Big Wire Diameter Coil Springs
Cold coiled springs are non-standard products. So the production is conducted basing on the drawings clients have provided. Our cold coil springs are mainly provided for elevators, metallurgy, and engineering machinery industries. The annual sales volume of cold coiled spring in Juneng reaches 300 million Yuan. Juneng has established comprehensive quality inspection system for each production process to ensure that our springs' precision, fatigue strength, as well as other properties have reached the international standards. Standard products are available in stock. Now Juneng has been the long-term spring suppliers for Mitsubishi elevator, Hebei Dongfang Fuda Machinery, and Shanghai Jiling Elevator.
Technical Parameters| Material | spring steel, stainless steel, carbon steel, 60Si2Mn, 65Mn, or other steels clients have required |
| Customization | springs are customized basing on clients' drawings, sample, and dimension |
| Spring diameter | 0.2mm-100mm |
| Packaging | wooden box |
Manufacturing Technique of Cold Coiled Spring
Coiling → Stress Removal & Annealing → Double-End Grinding → Sand Blasting, Correction, Stress Removing an Annealing → Heat Setting → Inspection → Anti-Corrosion Treatment on Spring Surface
Customizing
1. After receiving clients' drawings, samples or spring dimensions, we will discuss with clients to determine some details, and then the production will start. Technical advisory service is offered for free.
2. Product report and testing result will be sent to customers together with the springs.
Why Choose Us
1. We offer custom springs exactly according to clients' requirements
2. Juneng provides you comprehensive and considerate
3. DN high-speed quenching oil developed by Nanjing University of Aeronautics and Astronautics is used as the quenching medium. It has greatly reduced the deformation and cracking during quenching, as well as improved the hardness of springs.
4. With 3 large CNC salt bath tempering furnace, the internal stress of the springs is eliminated uniformly
5. 6 sets of end grinding machines and M4013 double-end grinding machine are adopted to prevent the overheating phenomenon occurred during grinding
6. Sand blasting is finished by a large suspended rotary shot blasting machine, ensuring a large surface hardness and long service life.
7. We use an advanced CJW-6000 magnetic particle flaw detection machine to check the internal flaws of the heat treated springs,
