Two forming processes of spring

[guide] briefly introduce two forming processes of spring.

(1) Cold forming technology of spring

1) One time automation ability of cold forming process. At present, the cold forming machine has developed to 12 claws. The steel wire in the range of (0.3-14) mm can basically be formed in one time by 8-claw forming. At present, the 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 The durability of the equipment is improved by improving the precision of the equipment parts and strengthening the effect of heat treatment;

③ Length sensor and laser rangefinder are added to control the manufacturing process of CNC forming machine automatically.

2) Cold forming process range capability. At present, the spring coiler with large wire diameter has a maximum specification of 20 mm, 2000 MPa and a winding ratio of 5. The cold forming process of minic block spring and eccentric spring with variable or equal diameter material has limitations.

(2) Hot forming technology of spring

1) Hot forming process speed capability. At present, in China, there are only CNC2 axis hot spring coiler with the maximum speed of 17 pieces per minute. Compared with developed countries, there is a big gap.

2) Large spring hot forming process control ability. Because there are only CNC 2-axis hot coil spring machine, the shape control is less in three directions, and the accuracy is poor; moreover, there is no automatic bar rotation control and adjustment mechanism, so the forming process level and capacity of hot coil spring are low. Therefore, the accuracy level and surface oxidation decarburization level of the spring are also low.