|Place of Origin:||China|
|Minimum Order Quantity:||1000 Pieces|
|Packaging Details:||Carton+ Wood box|
|Payment Terms:||T/T, D/P, L/C, Western Union|
|Supply Ability:||1000000 Piece/Pieces per Month According to the order|
|Wire Diameter:||4.5mm||Material:||Stainless Steel|
|Packing:||Carton+ Wood Box||Height:||Custom|
Stainless Steel 304 Extension Coil Springs,
4.5mm Extension Coil Springs,
4.5mm metal tension springs
Stainless Steel 304 316 Extension Springs Return Springs
Product introduction: Tension springs (also called tension springs, referred to as tension springs) are coil springs that bear axial tension. Tension springs are generally made of round cross-section materials. When not under load, the coils of the tension spring are generally tight and there is no gap.
The two ends are divided into a variety of specifications such as with hook, without hook (protective cover), with pull ring or one with hook and one with tension spring.
Model and material: customized or designed according to user drawings
Extension Springs product attributes
|Material||Spring Steel wire,304/303/316Stainelss Steel,Music wire,copper wire, Phosphor bronze Wire or any available wire.|
|Finishing||End rounding,polishing, electrochemical polishing etc.|
|Application field||Electronic spare part,furniture parts,cellphone parts,auto hardware parts,gym equipment fittings ,etc.|
Anodizing, Polishing, Powder coating, Passivation, Sandblasting, Nickal plating,
Zinc plating, Chrome plating, Heat treatment, Oxidation
Electronic, auto, electric appliance, electrical machine, toy, medical treatment,
loudspeaker box, furniture and fitness equipment and other industries.
|Design||According to customer drawing or sample|
CNC spring machines,CNC punching machines, CNC milling machines, CNC turning machines,
CNC machining center, Automatic lathes, Linear cutting, Grinding machine etc.
|Standard||JIS, DIN, ANSI, EN, etc.|
|Tolerance||0.005mm - 0.01mm|
|Surface Roughness||Ra 1.6 -3.2|
Foam polybag + Outer -Standard Carton Box/Carton Box with Pallet
+ Stretch Film
|Software||Auto CAD, Solid work, UG: PDF, DWG, DXF, IGS, STEP, SLDPRT|
Application of Extension Springs
Long-term use will cause changes in the shape and performance of the extension spring. If it has been under certain conditions, the extension spring may undergo qualitative changes due to external conditions. Generally there are the following situations:
1. Wear of the extension spring:
Wear is divided into: abrasive, fatigue and corrosion wear fracture.
2. Brittle fracture:
Most of the spring fractures are brittle fractures. Only when the working temperature is high, can plastic fracture occur. In engineering, fatigue fracture, stress corrosion fracture and hydrogen embrittlement fracture are called brittle fracture.
3. Fatigue fracture of tension spring:
The spring breaks under cyclic loading.
4. Hydrogen embrittlement, cadmium embrittlement, black embrittlement:
Brittle fracture caused by excessive impurities in the spring material.
5. Corrosion fatigue fracture:
The tension spring breaks under the combined action of cyclic load and corrosive medium.
6. Stress corrosion fracture:
The tension spring breaks under the combined action of tensile stress and corrosive media.
How to choose spring material
The choice of spring material should be determined according to factors such as the nature of the spring load, the stress state, the magnitude of the stress, the working temperature, the environmental medium, the service life, the requirements for conductive and magnetic conductivity, process performance, material source and price. When determining the material profile
The choice of spring material should be determined according to factors such as the nature of the spring load, the stress state, the magnitude of the stress, the working temperature, the environmental medium, the service life, the requirements for conductive and magnetic conductivity, process performance, material source and price.
When determining the cross-sectional shape and size of materials, the series of sizes specified by national standards and ministerial standards should be selected first, and materials with non-standard series specifications should be avoided as far as possible.
Small and medium-sized springs, especially spiral tension springs, should be given priority to steel wires that have been strengthened, lead bath isothermal cold drawn steel wires and oil-quenched tempered steel wires, which have higher strength and good surface quality, and their fatigue performance is higher than that of ordinary quenching. Tempered steel wire, simple processing, good manufacturability and stable quality.
Carbon spring steel wire and piano steel wire produce large residual stress after cold drawing. After processing the spring, there is a large residual stress, and the size changes after tempering, which makes it difficult to control the dimensional accuracy. Oil-quenched and tempered steel wire is modulated and strengthened after the steel wire is drawn to the specified size. There is basically no residual stress. After the spring is formed, it is tempered at low temperature, the size change is small, and the heat resistance stability is better than cold drawn Strengthen the steel wire.
Custom Extension Springs
When you require a special spring design, our design specialists will assist you in ordering custom extension springs. We will work with you to make sure that your custom extension springs meet all of your needs and work within your budget. As an experienced expert in the manufacture of extension springs, HuiHuang can work from new or existing custom designs to deliver the extension springs you need
Xinxiang Huispring Spring Co., Ltd. is the governing unit of China Spring Industry Association and the governing unit of China Internal Combustion Engine Electrical and Electronic Industry Association. Founded in 1987, it is a national high-tech enterprise and has passed IATF16949 international quality system certification. The company is located in Xinxiang City, Henan Province The industrial development zone covers an area of 45 acres and has a construction area of 20,000 square meters. It has convenient transportation and beautiful environment. The company has strong technical force. It has international advanced spring production equipment and testing equipment. It has Zhongyuan Spring Research Institute and Henan Engineering Technology Center. Bringing together a large number of professionals and management talents in the industry, the company has become a strong professional spring manufacturing company. The company has always adhered to innovative development and established a cooperative relationship with the Chinese Academy of Sciences Mechanical Research Institute. The main products of the company are: car starter motor springs, scroll springs, flat springs, switch springs, household appliances springs, oil pump springs, various switch springs, seat recliner springs, wave springs, cylindrical springs, disc springs, Stamping parts, and various extension springs and other special-shaped springs. Honesty, high quality, and casting Huispring have always been our business philosophy.
Product packaging: generally a certain number of transparent plastic bags, and then by the carton packaging.Of course, if you have special requirements, we can also meet them.We have several regular partners: Bosch, Petra, Hitachi, dicks, dongfeng electric, etc.We have experience working with customers from all over the world, such as the United States, India and Australia.So you don't have to worry about transportation as long as your products are in our production range.
Q: Are you a factory?
A: We are a 32-year-old factory, we pick up OEM orders.
Q: When can I get a quote?
A: We will quote you within 24 hours after receiving your inquiry. If you are in urgent need of price, please call us or let us know in your email address so that we can respond to your inquiry first.
Q: How to customize (OEM/ODM)?
A: If you have product drawings or samples, please send them to us and we can customize them according to your requirements. We will also provide our professional advice on products to maximize design performance..
Q:How long is your delivery time?
A: It usually takes 5~15 days, depending on the quantity you need. If time is urgent, you can arrange it.
How to choose a spring manufacturer? We can judge by inspecting the following 10 points of spring manufacturers:
1. Types of springs that can be produced.
Different types of springs require different production equipment. The more types that can be produced, the more complete the production equipment of the company.
2. Ask about the production accuracy of the spring.
The precision of producing springs represents the production technology capability of the spring factory. The higher the production precision, the more attention the spring factory pays to the quality of the products.
3. Whether there is a research and development team.
The R&D team is indispensable for an enterprise. The R&D team of the spring factory can make this enterprise develop in the direction of new processes and new technologies. ~Innovative ability
4. Whether the production equipment is imported.
Most of the domestic spring equipment is used to produce some non-important parts of the spring, the overall production accuracy is low, and there is a certain gap in product consistency. The higher the precision of the spring equipment, the higher the precision of the spring can be made.
5. Output of spring production.
The production output of springs represents the production capacity of this enterprise. The greater the production capacity, the stronger the supply capacity and the stronger the relative delivery guarantee.
6. Which manufacturers are the suppliers for?
As the saying goes, to marry a wife, you must choose the right person, and you also need to find a partner. For example, you are in the automotive industry, and Xinxiang Huispring Spring Co., Ltd. is a spring for the automotive industry. They directly supply the German Bosch company, so the product quality must be very guaranteed. This is very suitable for you. If you are making a ballpoint pen and you want an ordinary ballpoint pen spring, then this bright spring spring may not be suitable for you. You should choose an ordinary spring factory.
7. Whether there is a special testing department and whether the testing equipment is complete.
The inspection department is a necessary department of the spring enterprise. If no one supervises quality control, or quality control cannot use effective equipment for inspection, then no one would dare to use such products.
8. What is the defective rate of the spring produced? ,
The defective rate of springs of qualified spring manufacturers is generally between 5 and 12 parts per million. This data contains the data of nonconforming products detected by the manufacturer. The smaller the data, the stronger the accuracy and consistency of spring production.
9. Where are the raw materials of the springs purchased and whether they are inspected plate by plate.
The production process of the spring is very important, and the raw material of the spring is more important. For the same material, some material dealers sell it for 5 yuan, and some material dealers sell it for 10 yuan. Why is this? On the one hand, it is the consistency of the steel wire, such as some places where it is thick and some places, on the other hand, whether the composition of the spring material is evenly distributed and whether the content is qualified. The spring produced by unqualified spring raw materials is also unqualified, such as frequent breakage or deformation, and the spring load cannot be reached.
10. Whether it has the qualification certificate of the relevant industry.
For the spring industry, are some certificates very difficult to obtain, such as IATF16949 and GJB 9001C. These are very rare certificates. If this spring company has these qualifications, at least it proves to be very formal.
Finally, we still have to conduct on-site inspections and see how much the registered capital of this spring factory is, so as to avoid subsequent supply problems.