(1) Spring cold forming process

1) One-time automation ability of cold forming process. Cold forming machine has been developed to 12 claw. In the range of (0.3 ~ 14)mm steel wire, basically in 8 claw forming machine forming. Current development direction of forming process equipment:

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

(2) Improve the durability of equipment by improving the precision of equipment parts and strengthening the effect of heat treatment;

The length sensor and laser rangefinder are added to automatically control the manufacturing process of CNC forming machine.

2) Cold forming process range ability. At present, large wire diameter spring coiling machine, specification can reach 20mm, 2000MPa, winding ratio 5. The cold forming process of minIC-block spring and eccentric spring with variable diameter or equal diameter material still has limitations.

(2) spring hot forming process

1) Speed ability of hot forming process. At present, there are only CNC2 hot spring coiling machine on the specification of (9 ~ 25)mm in China, and the speed is 17 pieces per minute. Compared with developed, the gap is large.

2) Large spring hot forming process control ability. Because there is only CNC2 axis hot spring coiling machine, so the shape control has less effect in three directions, and the precision is poor; And there is no automatic rod rotation control and adjustment mechanism, so the hot coil spring forming technology level and ability is low. Therefore, the accuracy level of spring and surface oxidation decarbonization level is also low.