1. Cold forming
1) One-time automation capability of cold forming process. The cold forming machine has been developed to 12 jaws. Steel wires in the range of (0.3 to 14) mm can be formed at one time in the 8-jaw forming machine. Development direction of forming process equipment:
① To improve the forming speed, the main development trend is to improve the forming speed of the equipment, that is, the production efficiency;
② Improve the durability of the equipment by improving the precision of the equipment parts and strengthening the heat treatment effect;
③Add a length sensor and a laser range finder to stop the automatic closed-loop control of the manufacturing process for the CNC forming machine.
2) The ability of cold forming process. Large wire diameter spring coiling machine, the maximum size can reach 20mm, =2000MPa, the winding ratio is 5. There are still limitations in the cold forming process of reducing or equal diameter Minic-Block springs and eccentric springs.
2. Thermoforming
1) Hot forming process speed ability. Our country only has CNC 2-axis hot coil spring machine for forming on the (9~25) mm specification, with a maximum speed of 17 pieces per minute. Compared with prosperous countries, the gap is large.
2) Large spring hot forming process control ability. Since there is only a CNC 2-axis hot coil spring machine, the shape control is less effective in three directions, and the accuracy is poor; and there is no automatic bar rotation control and adjustment mechanism, so the degree and ability of the hot coil spring forming process are low. Therefore, the accuracy of the spring and the degree of oxidative decarburization of the surface are also low.
