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November, 2014

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Island international property for the overall distribution of Daikin air conditioning program

International Plaza, Blue Bay air conditioners why Hunan Daikin air conditioner

temperature in Hunan province to undertake international Blue Bay throughout the more than 70,000 square meters of office space of Daikin air conditioning and distribution program, using large equipment, CMS systems, from the concept of cost control and energy saving and environmental protection, which can ensure the overall program, also did a reasonable layout. This project all by my company design, construction and installation, after-sale maintenance.

Air conditioning, Blue Bay International Plaza configurationis located in the new town center of South Lake District, Changsha city, dominating the CBD core extension of print Riverside plots, with a unique vision delineation urban core high-end hotels, office buildings, residential enclave, run for the new spirit of CBD, proliferation of permanent lock. Rare stone mansion, the endorsements century monumental works, derived from European courtly neo-classical ideas architecture, temperament was born as honor, noble style origins long; facade has a full-bodied dry hanging stone + advanced helical tempered insulating glass curtain wall, tens of thousands of pieces of natural stone are the selection of ancient mountains, over thousands of years to temper, then by master carved out.

Safe to drink tap water _ Chinese air conditioning network

Safe to drink tap water technology streamlines the overall design, intelligent, moisture-proof, anti-fouling design.

Direct health drink, sweet and refreshing, cooking, soups, tea, taste nice. Nourishing the skin, eliminate secretion on the skin, can eliminate fat in the digestive system, for small household electrical appliances, so that appliances extend life, can also be used to breed fish.

Hunan thermostat smart Water Purifier features the blue float ZHRO-50-E-introduction

Introduce floating blue water machine

Simple design, patented “bottle cap” design allows the bucket with the machine is easy to separate, when the water when it is full, the machine automatically stops water, can produce 20 barrels of drinking water per day, a bucket capacity of 2.5 gallons, easy to carry out.

“big cap” design makes it easy and fast cleaning buckets without fear of secondary pollution, buckets and funnel can be applied to all. Five automatic water systems, imported booster pumps comply with CE and UL standards, low noise, high water, and long service life.

United States imported GE,RO film, much water, and machine imports, through ISO-900 certification, Enterprise patent exterior styling, patent cartridge style. &nbsp

Tier 1 link building by manual,1st tier backlinks built manually

Island international property for the overall distribution of Daikin air conditioning program 1

We provide service of Tier 1 link building by manual, to help your website get good rank in search engineer.

tier one buildingIn building websites,we accumulate many good high PR websites as resources to build Tier 1 link .

Therefore,we can supply service of  Tier 1 link building by manual to help your website get good rank in search engineer.

Remember:  we do link building only for Tier 1. We don`t provide serive to build  links for Tier 2 and Tier 3,which can be built by software automatically.

Remember: we build link only by manual/by hand. Refuse to automatic building by software.As we highly noticed that Tier 1 links require very high quality backlink! We assure 100% by manuel, with different IP and different time.Can do it with drop dip.

All backlinks are made on high PR web2.0,articles with contectual keyword in a complete article which long is more than 400 words.All link words pointed to your website are different,with different IP to build.

Benefits of Tier 1 link building by manual

Building backlinks in high PR websites by Manual can give your website a very solid foundation to rank in google search engineer.
After build your onpage contents,The first thing you need to do is to build tie 1 backlinks by manual in web 2.0′s,Social Networks, and high PR articles websites.

We creat a quality page/article for you that actually look like a real manuel blogs/article and then to pass more link juice and go unnoticed with Googles mystical super physic robots!

By building these quality backlinks alone can dramatically push your website to the first page in google search engineer.
Yes, we every seen many websites that only by building a few of these manual on web 2.0′s and social networks,his website therefore rockets the SERP’s! These Tier 1 links arevery powerful, but let me warn you.

We will prepare some contextual areticles which is related with your keywords.We assure that all of these content are hand written by us!All of content we creat for you are absolutely unique, and it is relevant to your subject/keywords.

We wouldn`t leave any trace!
Before build every backlinks,we`ll login a VPN service so that the I.P address cannot be traced, as there is no footprint leading back to you by the way, so the built web 2.0′s is completely unique.

Condenser Tube,Aluminum Alloy seamless Tube

Island international property for the overall distribution of Daikin air conditioning program 2

Condenser Tube,Aluminum Alloy seamless TubeItem: Condenser Tube,Aluminum Alloy seamless Tube

Short Description: It is Aluminum Alloy seamless Tube,widly used as condenser tube.High heat exchanging effience.

Material: Aluminium alloy 3003,1060,3102,etc

Dimension: OD:4-32mm Thick:0.4-2.5mm
Specification:1/4″ 3/8″ 1/2″ 5/8″ 3/4″ 7/8″ 11/4″;

Place of Origin: China

Service to world: Yes, accep order in bulk quantity or  in small quantity.

Models & Details for “Condenser Tube”

Product Features:

  • The condensation tube uses: mainly used for automobile air conditioner, condenser, cooler, air conditioner compressor,refrigerator, cold storage for refrigeration equipment

  • Condenser tube material: Aluminum  Alloy 3003, 1060,3102

  • O.D: 4-32mm

  • Wall thickness: 0.4-2.5mm

  • The condensation tube specifications: 1/4 “,3/8” ,1/2 “,5/8″, 3/4″,7/8″, 11/4”

More types we can provide:

Pipe O.D: 8-600 mm
Wall Thinkness:0.5-50mm

Aluminium Cat.1:1060、1070、1050、1100、1200、1035,etc

Aluminium Cat.2:2A11、2017、2A12、2024,etc

Aluminium Cat.3:3003、3A21,etc

Aluminium Cat.5:5005、5A02、5052、5A03、5A05、5A06、5083、5086 5754,etc

Aluminium Cat.6:6061、6063、6082、6005、6N01,etc

Aluminium Cat.7:7075、7005、7N01、7N04,etc

Aliminium tube:H112、F、O、T3、T4、T5、T6,etc

Aliminium round tube main specification:

O.D:8mm,10mm,12mm,15mm,16mm,20mm.22mm,25mm,

28mm,45mm,50mm,60mm,70mm,80mm,100mm,

150mm,200mm,250mm, 300mm,400mm,500mm,etc

Aliminium square tube main specification:

8x8mm,12x12mm,14x14mm,20x20mm,25x25mm,30x30mm,50x50mm,

18x12mm,30x20mm,40x20mm,40x30mm,60x30mm,60x40mm,70x40mm,

50x25mm,60x40mm,50x30mm, 80x50mm, 100x50mm,etc

Condenser TubeAluminum--Alloy-seamless-Tu Aluminum-condenser-tube

Buying Guide to “Condenser Tube”
  • The product is available for retail and wholesale;
  • The place of origin is in China,when you buy one or a small quantity,please consider international air freight as cost;
  • Accept bulk order with Container delivery;
  • Accept customized production;
  • More types of  Condenser Tube are not displayed on the web.If the item above doesn`t meet your requirement,please contact us to email: [email protected] ,we can supply a favourite item you need.

Metal Tube Bending without a Mandrel

Island international property for the overall distribution of Daikin air conditioning program 3

Metal Tube StampingMetal Products Fabricate In China  >> Metal Tube Fabrication >> Metal Tube Bending >> Metal Tube Bending without a Mandrel

tube bending-without mandrelMetal Tube Bending without a Mandrel

Carton steel Tube Bending without a Mandrel;
Stainless steel Tube Bending without a Mandrel;
Aluminium Tube Bending without a Mandrel;
Copper Tube Bending without a Mandrel;
… …
Many smaller diameter tubes can be bent successfully without a mandrel while maintaining acceptable levels of collapse and distortion in the bend area. This is accomplished by using specialized tooling and selecting the proper material and bend radius. By eliminating the use of a mandrel, parts can be easily processed with robotics and automated equipment and may not require any clean-up of bending lubricants. We use this method to produce oil lines, fuel lines, hydraulic lines, oxygen lines, and many other fluid and gas tubes.

Place of origin: China.  Service to worldwide.

Models & Details for “Metal Tube Bending without a Mandrel”

Product Features:

  • minimal collapse in the bending area;
  • used in tight radius and thin tube wall applications or where a constant flow area is critical to the performance of the product;
  • used in decorative applications with demanding visual requirements;
  • used in intake and exhaust pipes, aircraft components, and hand rails.
  • are available with carbon steel tube,stainless steel tube,aluminium tube,copper tube;
Buying Guide to “Metal Tube Bending without a Mandrel”
  • The service is available for customize;
  • The service place of origin is in China;
  • Accept bulk order with Container delivery;
  • Accept customized production;
  • Please contact us to email: [email protected] ,we can supply a favourite item you need.
General Knowledge on “Metal Tube Bending without a Mandrel”

 

 

Metal Products Fabricate In China  >> Metal Tube Fabrication >> Metal Tube Bending >> Tube Bending without a Mandrel

Duct Inline extract fan

Duct inline-extract-fan

HVAC Parts >>Ventilation Material>Air Duct Accessory>>Duct Inline extract fan

Duct inline-extract-fanItem: Duct Inline extract fan

Short Description: Round connector Dia.100mm,125mm,150mm,200mm.Extract air into and out to the air duct.

Models and Details: See as below;

Place of origin: China

 

Models & Details for “Duct Inline extract fan”

Models & Details:

Duct-Inline-extract-fan-1 Duct-Inline-extract-fan-2 Duct-Inline-extract-fan-3Duct-Inline-extract-fan-4

Buying Guide to “Duct Inline extract fan”
  • The product is available for retail and wholesale;
  • The place of origin is in China,when you buy one or a small quantity,please consider international air freight as cost;
  • Accept bulk order with Container delivery;
  • The connector is round.More types of  Duct Inline extract fan are not displayed on the web.If the item above doesn`t meet your requirement,please contact us to email: [email protected] ,we can supply a favourite item you need.
General Knowledge on “Duct Inline extract fan”


HVAC Parts >>Ventilation Material>Air Duct Accessory>>Duct Inline extract fan

Metal tube mandrel bending

Island international property for the overall distribution of Daikin air conditioning program 4

Metal Tube StampingMetal Products Fabricate In China  >> Metal Tube Fabrication >> Metal Tube Bending >> Metal tube mandrel bending

metal tube mandrel-bendingMetal tube mandrel bending

Carton steel tube mandrel bending;
Stainless steel tube mandrel bending;
Aluminium tube mandrel bending;
Copper tube mandrel bending;
… …
Metal tube mandrel bending means to deform tubes with minimal collapse in the bending area. It is most often used in tight radius and thin tube wall applications or where a constant flow area is critical to the performance of the product. It is also used in decorative applications with demanding visual requirements. This method is often more expensive than other bending practices due to the complexity of the tooling and set-up processes and because it is more difficult to automate loading and unloading. In addition, post-bending cleaning processes are usually required to remove drawing lubricant used during bending. This method is commonly used in intake and exhaust pipes, aircraft components, and hand rails.

Place of origin: China.  Service to worldwide.

Models & Details for “Metal tube mandrel bending”

Product Features:

  • minimal collapse in the bending area;
  • used in tight radius and thin tube wall applications or where a constant flow area is critical to the performance of the product;
  • used in decorative applications with demanding visual requirements;
  • used in intake and exhaust pipes, aircraft components, and hand rails.
  • are available with carbon steel tube,stainless steel tube,aluminium tube,copper tube;
Buying Guide to “Metal tube mandrel bending”
  • The service is available for customize;
  • The service place of origin is in China;
  • Accept bulk order with Container delivery;
  • Accept customized production;
  • Please contact us to email: [email protected] ,we can supply a favourite item you need.
General Knowledge on “Metal tube mandrel bending”

 

 

Metal Products Fabricate In China  >> Metal Tube Fabrication >> Metal Tube Bending >> Metal tube mandrel bending

Metal Lathing

Island international property for the overall distribution of Daikin air conditioning program 5

Metal LathingMetal Products Fabricate In China  >> Metal Lathing

Metal LathingMetal machining,Metal Lathing

Short Description: Lathing/Machining metal products according to customer`s drawing or sample;
Material: Carbon Steel,Stainless Steel,Aluminium,Copper,Brass,etc;
Shape & Size: Customized according to drawing;
Place of Origin: China;
Service to World: Yes;
Delivery Time:Depends on order`s quantity.

Related Service

  • Metal Cold Forging
  • Metal Cold Heading
  • Sheet Metal Drawing
  • Metal Impact Extruding
 What can we do for you?–Metal Lathing

MetalHelper provide service of Metal Lathing.The demand for high precision machining and tooling in today’s ever changing industrial landscape has called for new and improved equipment and techniques. As the demand for stronger and more sophisticated parts increases, so does the demand for high tech equipment.

Computer aided technology has allowed companies to greatly improve existing machining and tooling techniques at the micro level for exact detail and precision.

One such piece of equipment is the CNC Lathe Tooling Machine.

The CNC Lathe has enabled businesses to produce detailed, and sophisticated parts in a much more effective and efficient manner. With the advent of computer aided technology, the CNC Lathe Tooling Machine has allowed companies to produce intricate parts with much more detail in half the time needed by traditional techniques.

MetalHelper`s CNC has specialized in CNC Lathe Tooling for over 10 years. Our team of professional machinists will work with you and your business in helping you decide which method is the best fit for your applications. We will work in the most effective and efficient manner to create the perfect finished product, exactly to your specifications.

At Metalworks CNC, we employ the use of two high end lathes. The first is our CNC Mori Seiki lathe and the second is our manual Mori Seiki manual lathe. Both machines allow our machinists to create custom, precision made applications.

Metal Lathing products Metal Lathing equipments

 General Knowledge on “Metal Lathing,Metal machining”

What is Metal Lathing,Metal machining?

Lathing,also named with Machining, is any of various processes in which a piece of raw material is cut into a desired final shape and size by a controlled material-removal process. The many processes that have this common theme, controlled material removal, are today collectively known as subtractive manufacturing, in distinction from processes of controlled material addition, which are known as additive manufacturing. Exactly what the “controlled” part of the definition implies can vary, but it almost always implies the use of machine tools (in addition to just power tools and hand tools).

Machining is a part of the manufacture of many metal products, but it can also be used on materials such as wood, plastic, ceramic, and composites.A person who specializes in machining is called a machinist. A room, building, or company where machining is done is called a machine shop. Machining can be a business, a hobby, or both.Much of modern day machining is carried out by computer numerical control (CNC), in which computers are used to control the movement and operation of the mills, lathes, and other cutting machines.

Material for Metal Lathing,Metal machining

Usually,the following metal are always to do with Metal Lathing,Metal machining:

  • Brass or Bronze
  • Copper
  • All kinds of Aluminum
  • Carbon Steels wire or bar
  • Stainless steel
  • Alloy Steel
  • Nickle Alloys
  • ……

Popular Metal products made with Metal Lathing,Metal machining

The following metal parts are popular to be made with Metal Lathing,Metal machining technology:

  • Shaft;
  • Rod;
  • Socket;
  • Bolts;
  • Bottle;
  • Fastners;
  • Rivet;
  • Other machinery parts;
  • … … and so on
 Contact MetalHelper to Metal Lathing,Metal machining

 Submit drawings for Metal Lathing,Let Metalhelper manufacture it for you.

Let Metalhelper to help you process/manufacture Metal machining,Please send us the meassage with drawing or sample photo,and tell us your purchased quantity in first order,and then we`ll quote to you. The more details on product you provide,the more quick we can quote. You also can visit  http://www.metalhelper.com to contact Metalhelper company directly for Metal Extrusion Fabrication business

procedures

Request Quotation for Metal machining,Let China metal factory serve for you:

[contact-form-7 id=”19″ title=”Contact form 1″]

Metal Extrusion Fabrication

Metal Products Fabricate In China  >> Metal Lathing

Metal cold heading

Island international property for the overall distribution of Daikin air conditioning program 6

Metal cold heading

Service:Metal cold heading,Metal impact heading

Short Description: Manufacture metal products with cold heading(or named impact heading) technology according to customer`s drawing or sample;

Material: Aluminium,Copper,Brass,Steel,Stainless Steel,etc;

Shape & Size: Customized according to drawing;

Place of Origin: China,Do Metal cold heading to World;

Want “Metal cold heading Items”? Inquiry or Order it!
 What can we do for you?–Metal cold heading

cold-impact-heading-parts cold-heading-machine

 Benefits of Metal cold heading

Most of machined parts could be re-designed and re-manufactured  to be parts made by technology of cold heading,which help you to get significant cost savings.

  • Improve production effience and reduced Production costs:Because of using high speed manufacturing process. The speed reaches range from 10 pieces per minute for low volume large press work to to 450 pieces per minute on the cold heading process.
  • Save material cost: Compared to a traditional machining process, cold forming process  can save up to 70%.
  • Better control product tolerance: compared to more expensive machining processes,less tolerance can be achieved throughout the production process by coldforming
  • Higher and better quality surface: compared to conventional machined surfaces ,cold forming process can get result . The cold forming process can eliminate the need for costly secondary operations, such as welding, machining, etc, with careful product and process design,
  • Improved part performance and characteristics: due to the metal deformation resulting in improved grain structure, while work hardening can yield significantly improved product performance,cold forming process can improve metal part performance and its characteristics.

For many OEMs,cold heading represents clear opportunities for cost savings over traditional large component manufacturing methods.

Material and Process Cost Advantages:

See below charts to check how much you can save if made with cold heading technology:

cold-heading to save material

The Result: Lower Costs of Product to the Customer

Better Quality and Consistency: cold heading is a purely mechanical process that forms metal into net or near net shapes, but unlike traditional alternatives, it is performed at room temperature without using additional heat, providing more precise tolerances and part to part consistency than any other method.

The products made with Cold Forging:

  • Higher Strength: Cold forming work hardens the material raising its yield stress, making it significantly stronger than can be produced through other methods. With these higher strength properties, component design thickness can often be reduced offering further savings on weight, material and clearance.
  • Higher yields for exceptional strength
  • Most precise tolerances available
  • Improved physical properties by refining grain structure
  • Exceptional surface finish no scale
  • Part-to-part uniformity/repeatability
  • Better functional reliability
  • Reduced/eliminated machining & waste
  • May eliminate subsequent heat treating

Advantages of cold heading

SpeedDepending upon the size and complexity of the part and the nature of the equipment of producing them, production rates of 4000 pieces per hour can be achieved.
EconomyWhen compared to casting and machining labor the metal savings alone justify the conversion to an impact extrusion.In some cases when the aluminum slug is sized accurately, little or no trimming or other secondary operations are required.
StrengthThe impact process naturally work hardens non-heat treatable alloys, while the heat treatable alloys can be heat treated in normal fashion after processing.
ToughnessThe impact extruding process produces parts that are dense and porous-free in structure. This condition cannot be obtained in a casting process or by machining of a bar material.
VersatilityAfter impacting, the product can be treated the same as any other piece of material. Secondary operations such as machining, grinding, welding, bending, plating or anodizing can be performed in the same way as any other piece manufactured by a more conventional process.
ConsolidationImpacts can directly replace machined components, or welded or riveted assemblies, in many designs. The process often reduces product costs for secondary machining operations and in many cases increases the strength of a product that was previously an assembly.
 General Knowledge on “Metal Impact Extruding”

cold forging parts

What is Mtal Cold Heading Process?

Cold heading,also named impact heading,is volume specific and the process uses dies and punches to convert a specific “slug” or blank of a given volume into a finished intricately shaped part of the exact same volume.

Cold Heading process means to adopt quick automative “part formers” or “cold-headers” to cut off and push into or transform a metal wire or metal bar into a shaped die, then, in an outward direction,the protruding end is upset. Through the above process, the metal wire(bar) is shaped on the same axis and it always involves to change a diameter from the original wire size as an extrusion.It can do repetitive and tight tolerances by using a special tooling succession at a quick speed up to four hundred times every minute.It is a high efficient technology to manufacture metal fasteners,screws,nuts and custom various of metal parts and components according to your drawings or samples.

The secondary process after Metal cold heading:

Though metal parts coming from cold heading process are usually complete or near to be finished with very small minimal scrap, generating significant raw material savings compared to traditional screw machining process,it always still is used as the primary manufacturing process which produce as simple as a screw/nut blank. The part then always comes with secondary process including polishing,maching,etc to achieve more high precision part configuration with good tolerances grade.The best commen secondary process are:

  1. Heat Treatment. To achieve a desired result such as hardening or softening of a material. Heat Sometimes,heating and cooling are done for the specific purpose of altering properties intentionally, they often occur incidentally during forming.
  2. Polished.To polish the cold forming product,usually,they will be sprayed with mini stainless steel ball in a closed room,then all scraps,oils,burrs will be removed.
  3. machined or lathing.Machining process is usually to make screw thread or make a horizontal hole on the cold forming product.As cold forming process itself is diffcult to make thread or horizontal hole.
  4. Anodic oxidation or electroplating.After all processes are finished,some products are required to do electroplating.If the product is made from aluminium,it is always required to do anodic oxidation

Typical Design Considerations for Cold Heading Parts

cold-form-designs

The below designs are some typical metal part which are always to manufactured by the cold heading process :

  • Metal Hexagonal Head
  • Metal Round Head&Square Head
  • Round Head with Slit
  • Radial Slot & Recessed Drive
  • Double Reverse Extrusion
  • Diameter Reduction
  • Cylindrical Extrusion
  • Offset, Pierced and Embossed
  • Multi-Diameter Extrusion
  • Carriage Bolt
  •   Offset Head
  • Lugs&Collar

Material for cold heading process

Usually,the following metal are always to do cold heading processs:

  • Brass or Bronze
  • Copper
  • All kinds of Aluminum
  • Carbon Steels wire or bar
  • Stainless steel
  • Alloy Steel
  • Nickle Alloys
  • ……

With the development of computer and cold heading process machines, cold heading design capabilities will be more and more and “endless.”

Cold heading`s metallic materials requirements

1, the mechanical properties of metallic materials for cold heading request
According to metal cold heading process characteristics,here is the requirement on the mechanical properties of the steel:
1) Yield strength Re and deformation resistance should be as low as possible, it let the unit deformation force to be reduced accordingly, to extend the life of the die;
2) cold deformation performance of meterial should be good, that means the materials should have good plasticity performance, lower hardness, which can let product avoid cracking in a large degree of deformation . For example,when you are going to cold head high strength bolts ,you can use carbon steel which has higher carbon content, also can use low carbon steel, low alloy steel. If increase carbon content in the metal, it will increase the hardness, decrease plasticity performance, to let cold deformation performance reduce. But if you add a small amount of alloying elements (such as adding a small amount of boron 10B21,10B33 steel) in low carbon steel, the steel can significantly be improved the strength to meet the performance requirements of the product ,and without compromising its cold deformation properties;
3) It`s better to have the lower sensitivity of the work-hardening materials, so that it can avoid too large deformation force. The work hardening sensitivity of the available material can be reflected by the deformation resistance – strain curve slope. The larger the slope, the higher the hardening sensitivity. Such as stainless steel 0Cr18Ni9 (SUS304),it has the maximum slope of the curve. The hardening sensitivity of this material is more intense, as the deformation increases, the deformation resistance rise sharply.
The performance of the mechanical properties of steel not only t billets original Rm, Re, A, Z and hardness and other indicators, affected not only by the chemical composition of raw materials, macroscopic tissue microstructure, etc., but also by the material preparation process drawing various channels and also affect by heat treatment process between.

2,Requirements on chemical constituents.
⑴ carbon (C) is the most important element to effect carbon steel`s cold plastic deformation . The more carbon content, the higher the strength of steel,but the lower plasticity performance. Each carbon content increased by 0.1%, the yield strength Re improve 27.4MPa, tensile strength Rm increase (58.8-78.4MPa), while the lower elongation A 4.3% reduction of Z 7.3% lower. When the carbon content of steel <0.5%, manganese content of <1.2%, reduction of Z = 80%, the unit is cold deformation force P and the steel containing C, Mn approximate relationship between the amount as follows:
P = 1950C + 500Mn + 1860 (MPa) …………………… (1)
You can see, the carbon content of the steel for cold plastic deformation properties is significant. In the actual process,the metal cold heading extruding steel carbon content is greater than 0.25%, it is required to have the best annealing steel plastic tissue – a spherical pearlitic structure. For the degree of deformation of 65% -85% of the cold heading fasteners without intermediate heat treatment is performed three times upsetting deformation, the carbon content should not exceed 0.4%. When the carbon content exceeds 0.3% -0.5% in the carbon steel, it is necessary to increase the use of intermediate or adopt process of full annealing,or use warm heading.
⑵ The role of manganese (Mn) steel with iron smelting .
(Mn + FeO + MnO + Fe) mainly for steel deoxidation to join. Manganese in steel acts with iron sulfide (Mn + FeS + MnS + Fe), can reduce harmful sulfur to steel performance. The Manganese sulfide formed can improve the machinability of steel/metal. Manganese let steel strength increase, decrease plasticity,it is unfavorable for cold plastic deformation properties , but the impact of manganese on the deforming force is only about a quarter of carbon. Due to the special performance requirements of the finished product, allowing for the sulfur content of manganese five times. In addition to the special requirements of the finished product, but should not exceed 0.9%.
⑶ silicon (Si)
silicon is the deoxidizer`s residues in steel smelting . When the silicon content in steel increased by 0.1%, the increase 13.7mpa. Experience has shown that when the silicon content of more than 0.17%, and greater carbon content, has a great influence on the plasticity of lower steel. Appropriate increase in silicon content in the steel, mechanical properties of steel, especially advantageous elastic limit, can also enhance corrosion resistance of steel. But when silicon steel exceeds 0.15%, so that the formation of non-metallic inclusions sharp steel, high silicon steel annealing does not even soften dramatically reduced cold plastic deformation properties of steel. If silicon is present in the steel in the form of silicic acid, the dispersion of the fine particles in the steel will be too worn mold. Therefore, in addition to product performance requirements of high-strength, cold heading steel always try to reduce the content of silicon.
⑷ sulfur (S)
Sulfur are harmful impurities. The sulfur in steel causes cold heading separated from each other at the time caused the crack. The presence of sulfur has also prompted to produce hot brittle and rusted steel. Thus the sulfur content should be less than 0.06%. When heading high-strength fasteners, should be controlled within 0.04%. Since the compounds of sulfur, phosphorus and manganese can improve cutting performance, the sulfur content of cold heading steel nut can be raised to 0.08% -0.12%, to facilitate for tapping.
⑸ phosphorus (P)
Phosphorus to solution strengthening and work hardening is very good.Severe segregation in the steel, increasing cold brittleness and temper brittleness of steel,to let the steel erodible acid. phosphorus will worsen cold plastic deformation properties in the drawing manipulation wire breakage, cracking in cold heading workpiece manipulation. Phosphorus content of the steel should desirably be controlled 0.045% or less.
⑹The effect from other alloying elements chromium (Cr), molybdenum (Mo), nickel (Ni), vanadium (V), tungsten (W) and other alloying elements on the cold deformation properties of steel is lower than carbon. In general, increases in steel alloying elements, mechanical strength index steel hardenability increases, performance decreases cold deformation.

3, microstructure request
In order to better adapt to the cold steel forging process, for the distribution of steel structure and the size and form of non-metallic inclusions has certain requirements.
⑴ steel structure
In addition to the ferritic steels in vitro, as well as pearlite. The higher the carbon content, the more the number of pearlite. Soft ferrite matrix, in the soft matrix embedded with hard pearlite particles. Piles of pearlite distribution is disadvantageous for cold deformation, will be the formation of cracks. Organization of steel should be closely uniform, so. Cold heading steel use as uniformly distributed spherical grain structure.
⑵ grain size
Deformation of the metal is due to the deformation of crystal grains and grain itself slip occurs. Within a certain volume, the number of fine grains of metal grains more inevitable than coarse grains of metal, plastic deformation position when slip of the grain to the benefit is greater, distortion can be uniformly dispersed in each grain. Corresponding to the fine-grained metal deformation inhomogeneity and unevenness due to deformation caused by stress concentration are small, so the chance of cracking is also small, appear to increase the amount of plastic deformation can withstand before cracking, plastic is better reflects foreign . The smaller the grains, the grains produced by excitation of adjacent slip stress is smaller. For the deformation continues, the applied stress must be increased, reflecting a larger external deformation resistance. Therefore should not be used for cold heading steel too small grains. Grains too, will make the surface rough, resulting in significant scars and cracks. Coarse grained steel work hardening sensitivity than fine grain steels, and less plastic, cold deformation performance is poor. Cold heading steel grain size requirements for the 4-6 grade, grain size specification is as follows: the average grain diameter of about (0.02-0.06) mm; the number of grains per mm2 of about 250-2300 months; average grain an area of about (400-4000) μm2.
⑶ nonmetallic inclusions
Regardless of the method of smelting steel, there will always be more or less non-metallic inclusions. An oxide or sulfide inclusions, causes the crystal structure of the metal close intermittently. In the form of inclusions, the number and distribution of different properties of steel for cold deformation effects are different. Cold heading wire is a hot-rolled steel products for use after cold drawing, rolling and cold drawing process, these inclusions have been elongated along the direction of deformation. In general, fine, uniform distribution of inclusions little damage. Small and scattered sulfide inclusions can be better with the deformation direction deformation, thus representing a number of other inclusions smaller damage resulting deformation. Particularly harmful alumina inclusions. Alumina fine particles not only extremely hard, it will damage the mold; and hard to combine with the steel substrate, often tearing manipulation in severe cold deformation of the workpiece. Thick or thin and local concentration of inclusions, for cold heading steel properties influence.

4, the requirement of surface quality
Surface condition of the majority of ordinary hot-rolled steel is not good enough. Hot-rolled steel surface defects after cold drawing (if the compression ratio is too small) can not be eliminated, resulting in cold heading product surface defects and waste, will be unable to produce serious.
⑴ billet surface defects
Steel smelting, steel ingot leaving bubbles, shrinkage and other defects. After hot-rolled and cold drawn, the wire with a more serious penetrating longitudinal, upsetting significantly when exposed to the product surface. Defects folded ears, segregation, cracks and other raw materials in the rolling, cold heading will cause serious harm. Such as: bolts breakage, cracking nuts; workpiece while rubbing and thread, screw blanks crushed in half and so on. Improper handling of raw materials in pickling, the steel surface pitting, corrosion. If pitting, corrosion minor, after cold drawing, is elongated pits on the surface is basically not show signs of cold heading in Buzhi Yu therefore cracks. If the pits will form a serious gap; the gap is presented in more corners of the large deformation of the workpiece. Cracks and other surface defects deeper, cold deformation performance worse. Experiments show: Whether cold-drawn or cold heading, shape deformation degree for cracks little effect, but the impact is great crack depth. For larger deformation cold heading materials, critical depth of surface defects is 0.04-0.10mm, deeper defects must be avoided.
In the low-carbon steel is heated atmosphere will cause decarbonization. Although the quality of the products from the appearance of decarbonization not see anything, but any change in the carbon content of the surface have a significant effect on the mechanical properties of the workpiece. Especially on the carbon content of more than 0.30% of the steel, the surface of the workpiece decarbonization fatigue strength and wear resistance obviously harmful. Material in order to prevent decarburization annealing, the protective gas should be used.
Contrary to carburization and decarburization. High carbon steel in high temperature environments will produce carburizing. While the finished product is equivalent to the carburizing for hard shell is acceptable, sometimes need to adopt a method of producing the soft-core, but for the cold heading process is quite harmful. There carburizing steel surface layer as thin as eggshells hard. When the material restructuring or cold heading, the surface will produce cracks or peeling, reduce cold deformation properties of steel. Therefore, cold heading steel should completely avoid decarbonization and carburizing. Decarbonization and carburizing steel case can be microscope examination.
⑵ dimensional accuracy requirements
The dimensional accuracy of the wire for cold heading has a great influence on product quality and process. Cold heading wire and molds are usually processed separately specialization. If the wire diameter exceeds the maximum allowable value, when the upsetting piece of metal on the head too, will have adverse burrs or workpiece curving bar. Or because the wire diameter is larger than the diameter of the die hole leaving the die hard feed. And the stem portion of the workpiece to be brushed die hole, the hole in the mold to form a sharp metal tumors. If the wire diameter is less than the minimum allowable value, while not upsetting the metal mold cavity is completely filled, causing the workpiece edges unclear. So cold heading material to be sufficiently close to the true circle, uniform diameter. Cold heading wire diameter tolerance is generally 0.20-0.35mm, roundness tolerance of 1/2 of the diameter tolerance.

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Metal Products Fabricate In China  >> Metal cold heading

Metal Cold Forging

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metal cold forging

Service: Custom Metal Cold Forging Products,Save material,Improve performance

Short Description:Cold forging use compressive force to manufacture and form metal parts,including to forge metal screws,sockets, bolts, power nuts, non-standard hardware parts, machinery parts, auto parts, construction parts,ground pins,sleeve bushing, rivets,ring gear,housing,etc.Adopting technology of cold forging/cold heading,not only save materials,but also increase density,and improve item`s performance.

Material: Aluminium,Copper,Brass,Carbon Steel,Stainless Steel,Zinc,etc;

Shape & Size: Customized according to drawing;

Place of Origin: China,Service to World;

Want “Metal Cold Forging Items”? Inquiry or Order it!
 Experienced products made with technology of Metal Cold Forging

Metal Cold Forging, also named cold extrusion, cold heading, is cold working, a process of metal defroming working and material forming, is carried out at a normal temperature. The material for cold forging are mostly small, better deforming ,mainly are aluminum alloys, copper and some alloys, low carbon steel, carbon steel, low alloy steel. The product surface with cold forging manufacturing is high quality, high dimensional accuracy, can replace some of the cutting. It makes material strengthen and improve the strength of the parts.

experienced cold forging metal parts cold-forming-parts-2 Metal Cold Forging Fabrication equipments fabricate Cold Forging metal parts manufacture cold forged parts

  • Aluminium cold forging parts
  • Copper cold forging parts
  • Brass cold forging parts
  • Carbon steel cold forging parts
  • … …
 Popular Metal parts made with metal cold forging/heading technology

The following metal parts are popular to be made with cold forging technology.Not only can save materials,save cost,but also can improve item`s strength density and production effience.

custom cold forged bushing- cold heading metal sleeve bushing

Custom cold forged nuts cold heading metal nuts

cold-forged-bolts-cold-heading

Custom cold forged pins cold heading pinston pins

custom cold forged socket cold heading metal housing socket

custom-cold-heading-rivets

Custom-cold-forged-terminal

Ring-Gears

  • Other non-standard parts

metal-cold-forging

 Benefits of metal cold forging

Most of machined parts could be re-designed and re-manufactured  to be parts made by technology of cold forming,which help you to get significant cost savings.

  • Metal Cold Forging improve production effience and reduced Production costs:Because of using high speed manufacturing process. The speed reaches range from 10 pieces per minute for low volume large press work to to 450 pieces per minute on the cold heading process.
  • Metal Cold Forging save material cost: Compared to a traditional machining process, cold forming process  can save up to 70%.
  • Better control product tolerance: compared to more expensive machining processes,less tolerance can be achieved throughout the production process by coldforming
  • Higher and better quality surface: compared to conventional machined surfaces ,cold forming process can get result . The cold forming process can eliminate the need for costly secondary operations, such as welding, machining, etc, with careful product and process design,
  • Metal Cold Forging improve part performance and characteristics: due to the metal deformation resulting in improved grain structure, while work hardening can yield significantly improved product performance,cold forming process can improve metal part performance and its characteristics.

For many OEMs,Cold Forging represents clear opportunities for cost savings over traditional large component manufacturing methods.

Material and Process Cost Advantages:

See below charts to check how much you can save if made with cold forging technology:

cold forging save materials

The Result: Metal Cold Forging can be lower Costs of Product to the Customer

Better Quality and Consistency: Cold Forming/Forging is a purely mechanical process that forms metal into net or near net shapes, but unlike traditional alternatives, it is performed at room temperature without using additional heat, providing more precise tolerances and part to part consistency than any other method.

The products made with Cold Forging:

  • Higher Strength: Cold forming work hardens the material raising its yield stress, making it significantly stronger than can be produced through other methods. With these higher strength properties, component design thickness can often be reduced offering further savings on weight, material and clearance.
  • Higher yields for exceptional strength
  • Most precise tolerances available
  • Improved physical properties by refining grain structure
  • Exceptional surface finish no scale
  • Part-to-part uniformity/repeatability
  • Better functional reliability
  • Reduced/eliminated machining & waste
  • May eliminate subsequent heat treating
 General Knowledge on “Metal Cold Forging”

What is Metal Cold Forging?

Cold forging,also named cold forming.In Japan ,called cold forging, In China, called cold heading,is a process descripted as a technology process with high speed manufacturing to let metal block(including steel,aluminium,brass,copper,etc) formed and shaped at normal circumstance temperature,the process ofen doesn`t require to remove the scrap of material..it is a manufacturing process,and also is a processing method. Same as cold stamping process,cold forging has basically same procedures . Cold forging process is composed by materia, molds, and equipment. The difference is that in cold stamping, the material is primarily sheet metal, but in the cold forging, the material is mainly discs or solid wire.

Basic concepts:
Metal Cold forging refers to the various volumes of metal carried below the recrystallization temperature of the molding.
Shapes of cold forging parts become more and more complex, from the initial stepped shaft, screws, bolts, nuts and catheters, etc., to the more complex shape parts. The typical process of spline shaft is: being extruded rod Department – upsetting the middle of the first part – extruded spline; splined sleeve main process is as follows: anti-extrusion cup – made of red bottom ring member – positive squeeze bushings. Cold cylindrical gear extrusion technology also successfully used in the production. In addition to black metal, the copper alloy, magnesium alloy and aluminum alloy cold extrusion applications are increasingly widespread.
Technology Advantages
Cold forging process is a precision plastic forming technology with cutting unparalleled advantages, such as good mechanical properties of products, high productivity and high utilization of materials, particularly suitable for mass production.It is adopted as a method of manufacturing the final product (Net-shape Forming), means of transportation in the aerospace and machine tool industry and other industries with a wide range of applications.

Process shortcomings
It has high requirement on Materials; not suitable for a small amount of processing; mold cost is high.

Technical Requirements
Cold forging technology is more diffcult than the warm forging and hot forging, It has unique advantages in the field of precision forming . It increased bore finishing, dimensional accuracy, surface strength, extending the life of the barrel.

Applications of metal cold forging
The current rapid development of automobile industry, motorcycle industry and the machine tool industry for the development of the traditional cold forging technology to provide a driving force. For example, China’s national output in 1999 had more than 11.26 million units of motorcycles, according to preliminary estimates of 2000, China’s total demand for cars to 2005 will reach 3.3 million, of which 130 to 1.4 million cars only forging needs of the automotive industry in 50 to 60 tons. Cold forging technology in China, although not too late to start, but the pace of development, but there is a big gap with the developed countries, so far, China’s production of cold forging weight of cars on the lack of 20kg, equivalent to half of the developed countries, developing great potential to strengthen and promote the use of cold forging technology development is an urgent task of our country.

Metal Cold Forging Die

Cold forging can be divided to being squeezed, anti-extrusion and coextrusion. Cold forging punch stands greater dynamic loads, to prevent fatigue failure die early, avoid excessive stress concentration, and should pay attention to the stability of the punch, punch the aspect ratio (L:D) is not too large when pressed steel, L:D≤3:1, extruded copper and its alloys L:D≤5:1, extruded aluminum and its alloys L:D≤10:1. When the stress exceeds the mold material σ0.2 / 2, the die need to be added with prestressing ring which can taper between the die and the prestressing ring (0.5 ° ~ 1 °) fit or shrink-fit (red jacket) .

Materials for Cold Forging

Currently,the available materials for cold forging and cold extrusion are: lead, tin, silver, aluminum (L1 ~ L5), aluminum (LF21, LY11, LY12, LD 10, etc.), copper and oxygen-free copper (T1, T2, T3 , TU1, TU2, etc.), brass (H62, H68, etc.), bronze (QSn6.5 a 0.1, etc.), nickel (N1, N2, etc.), cadmium zinc and zinc alloy, iron, carbon steel (Q195, Q215, Q235, Q255, 08, 10, 15 20, 25 30, 35, 40, 45, 50 numbers, steel, etc.), low-alloy steel (15Cr, 20Cr, 20MnB, 16Mn, 30CrMnSiA, 12CrNiTi, 35CrMnSi etc. ) and stainless steel (1Cr13, 2Cr13, 1Cr18Ni9Ti, etc.). In addition, for some titanium and titanium alloys, tantalum, zirconium, and Kovar alloy, also can be cold extrusion, even bearing steel GCr9, GCr15 and HSS W6Mo5Cr4V2 also can be a certain amount of deformation of cold forging and cold extrusion.

Low carbon steel cold forging dies require high hardness (59 ~ 66HRC), high compressive yield strength and toughness appropriate. Commonly used mold materials Cr12MoV, Cr12Mo1V1, W6Mo5Cr4V2 steel and base steel, prestressed ring often used 4Cr5MoVSi, 4Cr5MoV1Si steel (46 ~ 48HRC), prestressing steel outer ring usually 4Cr5MoVSi, 5CrNiMo so on.

Aluminum cold forging die

Carbon Steel can be T7A, T10A, Cr12, Cr12MoV, GCr15,9SiCr and CrWMn so on.

The mold with Excellent material, design right, good hot and cold processing, good heat treatment,though due to improper use of the machine adjustment and operation, it may still be invalid during the early failure. Machine adjustments and operational factors, including the accuracy, rigidity, gap adjustment machine, positioning allowed and occasional overload. Seriously these factors will help to identify the real cause of die failure, the greater volatility in the life of the mold production, often with the machine to adjust and use the operating factors, must be given adequate attention.

The secondary process after metal cold forging:

Though metal parts coming from cold forming process are usually complete or near to be finished with very small minimal scrap, generating significant raw material savings compared to traditional screw machining process,it always still is used as the primary manufacturing process which produce as simple as a screw/nut blank. The part then always comes with secondary process including polishing,maching,etc to achieve more high precision part configuration with good tolerances grade.The best commen secondary process are:

  1. Heat Treatment. To achieve a desired result such as hardening or softening of a material. Heat Sometimes,heating and cooling are done for the specific purpose of altering properties intentionally, they often occur incidentally during forming.
  2. Polished.To polish the cold forming product,usually,they will be sprayed with mini stainless steel ball in a closed room,then all scraps,oils,burrs will be removed.
  3. machined or lathing.Machining process is usually to make screw thread or make a horizontal hole on the cold forming product.As cold forming process itself is diffcult to make thread or horizontal hole.
  4. Anodic oxidation or electroplating.After all processes are finished,some products are required to do electroplating.If the product is made from aluminium,it is always required to do anodic oxidation

Cold forging,same as cold extrusion, due to friction,maybe cause cracks in the surface of the metal extrusion attached under the influence of tensile stress. Therefore, the better the metal material`s plastic performance, the lower the hardness, the lower the carbon content and the less fit sulfur, phosphorus and other inclusions, the weaker of work hardening sensitivity,then it is more favorable to cold forging/cold extrusion, the process quality of forging and extrusion will be better.

 Contact us to Customize Metal Cold Forging Products

 Submit drawings for Metal Cold forging,Let Metalhelper manufacture it for you.

Let Metalhelper to help you process/manufacture Metal Cold forming,Please send us the meassage with drawing or sample photo,and tell us your purchased quantity in first order,and then we`ll quote to you. The more details on product you provide,the more quick we can quote. You also can visit  http://www.metalhelper.com to contact Metalhelper company directly for Metal Extrusion Fabrication business

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