Product Description
Coil springs are key element of suspension on rolling stock. It is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. It can be divided into primary suspension also called journal box spring, and secondary suspension also called bolster spring.
| Parameters |
| Wire diameters(d) |
12-70mm |
| Coil diameters(D) |
60-500mm |
| Free height(L0) |
180-1000mm |
| Weight(Kg) |
4-160 |
| Number of active coil(N) |
3-12 or depend on drawing |
| Elements |
Internal spring and external spring |
| Materials |
60Si2Mn, 60Si2MnA, 60Si2CrVA, 60Si2CrVAT,50 CrV4, 51CrMoV4 and so on |
| Certifications |
ISO 9001,UIC 822 DIN 2096,EN 13298. |
| Usage |
Bogie of K2, K4, K8, Y25 with axle load of 21t, 22.5t, 25t etc. |
| Export destination |
We have exported to Vietnam, Pakistan, Namibia, Venezuela, Burma, Thailand, Angola,Sudan, Australia, etc. |
Product Features
1) New technology of surface modification and composite strengthening. In order to solve the world's major technical problem of surface decarburization of spring products in the process of hot rolling, the new technology of surface ultrasonic deep rolling or high load rolling is creatively adopted to modify the spring steel hot rolled bar material before hot rolling, and obtain the deformation texture layer with gradient structure, which provides a new way to greatly improve the mechanical properties and life of the spring. In order to solve the problem of fatigue crack initiation caused by stress concentration, high pressure water jet technology was used to strengthen the local high energy composite modification.
2) New methods of organizational regulation. In order to improve the yield strength of spring products, an innovative new process is proposed, that is, after slow cooling after hot winding, a low temperature area slightly above the critical zone Ac3 is heated for rapid quenching, which can not only achieve ultra-fine grain, but also obtain micro-nano scale twin substructure during the rapid cooling process, which significantly improves the yield strength and elastic reduction resistance of spring products. Aiming at the existing spring steel, especially the ultra-high strength spring steel with low plastic toughness, which leads to cracks in cold coiling forming process and difficulties in cold coiling forming, the spring wire after hot rolling is obtained by Q-I-Q-T heat treatment process with martensite plus transitional bainite and metastable residual austenite multiphase structure. Thus, the cold-forming performance of the spring is significantly improved.
3) New process of spring flattening and grinding. By increasing the thickness of the roller tip and the length of the roller tip without increasing the length of the material, the twisting phenomenon caused by bending and torsion deformation in the rolling process is reduced, and the length of the spring contact line is guaranteed. Automatic flattening, high flatness, no folding and no distortion of flat surface is realized by using automatic grinding tip forging equipment. After heat treatment, brittle secondary quenching martensite is easy to form during high temperature cooling, which leads to early fracture. Automatic spring grinding equipment is adopted, and the brittle problem of secondary martensite is eliminated by refining grain, optimizing grinding process and cooling conditions, and conducting short-time rapid tempering at medium temperature.
4) Fully automatic rolling production line development. In view of the relatively backward equipment of spring winding machine in China, poor spring precision, low degree of automation, and extremely low production efficiency, a fully automatic electric heating, spring winding, heat treatment, pressure spring, end treatment, inspection production line has been developed jointly with equipment manufacturing enterprises to achieve good deformation consistency in the rolling process, spring dimensional precision control and high precision in section grinding.
Company Overview:
Chongqing XinRail Technology Co., Ltd. - Your Trusted Partner for Premium Track Accessories. We specialize in providing top-quality products and innovative solutions for the railway and rail transit industries. Since our inception, we've been dedicated to enhancing the efficiency and safety of track systems worldwide with reliable products and exceptional service.
Our Advantages
1. Superior Quality Control - Ensuring products meet the highest standards.
2. Highly Competitive Prices - Get the best value for your investment. 3. Cutting-Edge Technology - State-of-the-art products for modern living.
4. Expert Team - Professional and passionate about lifestyle electronics.
5. Seamless Communication - Smooth, responsive, and easy to work with.
6. Effective OEM & ODM Services - Tailored solutions to meet your unique needs.
Our Mission
Our mission is to advance the safety and efficiency of the rail transit industry by providing excellent track accessories and services. We are dedicated to being a reliable partner for our clients, together facing future challenges and opportunities.
Please feel free to contact us for more information. We look forward to working with you and contributing to the development of the rail transit industry!
What are the main factors to consider when selecting track accessories?
When selecting track accessories, key factors include:
Compatibility: Ensure the accessories match the specifications of your existing track system.
Quality Standards: Look for products that meet international quality and safety standards. Durability: Consider the environmental conditions and load requirements to choose durable materials. Cost-effectiveness: Balance cost with the long-term performance and maintenance requirements of the accessories.
How do you ensure the quality of your products?
We ensure product quality through: Rigorous Testing: All products undergo thorough testing and quality control procedures. Certified Manufacturers: We source our products from internationally recognized manufacturers with proven track records. Compliance: Our products comply with industry standards and regulations to guarantee performance and safety.
Can you provide customized solutions for specific projects?
Yes, we offer customized solutions tailored to specific project requirements. Our team of experts can work with you to understand your needs and provide tailored products and solutions to meet your project's specifications.
Do you offer technical support and after-sales service?
Yes, we provide comprehensive technical support and after-sales service. Our team is available to assist with installation, maintenance, and troubleshooting to ensure the optimal performance of our products.
Do you ship internationally?
Yes, we offer international shipping to a wide range of countries. Shipping costs and arrangements will be provided based on the destination and order details.
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