(1) Cold forming process of springs

1) The one-time automation capability of cold forming process. The cold forming machine has now developed to 12 claws. Steel wires within the range of (0.3-14) mm can be formed in one go with an 8-claw forming function. The current development direction of forming process equipment:

① Improving the forming speed, the main development trend is to improve the forming speed of equipment, that is, production efficiency;

② Improve equipment durability by improving the precision of equipment components and enhancing heat treatment effects;

③ Add length sensors and laser rangefinders for automatic closed-loop control of the CNC forming machine manufacturing process.

2) Scope and capability of cold forming process. At present, the maximum specification of the large wire diameter spring coiling machine can reach 20mm, 2000MPa, and the winding ratio is 5. The cold forming process of variable or equal diameter Mini Block springs and eccentric springs still has limitations.

(2) Hot forming process of springs

1) Hot forming process speed capability. At present, there is only a CNC2 axis hot coil spring machine available in China for forming (9-25) mm specifications, with a maximum speed of 17 pieces per minute. Compared to developed countries, there is a significant gap.

2) Ability to control the hot forming process of large springs. Due to the limited CNC2 axis hot spring machine, shape control lacks three directional effects and has poor accuracy; Moreover, there is no automatic bar rotation control and adjustment mechanism, so the level and capability of the hot coil spring forming process are relatively low. Therefore, the accuracy level and surface oxidation decarburization level of the spring are also relatively low.