What matters should be paid attention to in spring processing?
Today, let us follow the steps of the editor of Dongguan Tianzhu Spring Factory to understand what should be paid attention to in spring processing. I hope our sharing will enable you to better understand Spring.
What should be paid attention to in spring processing?
1. Springs without support rings and springs with too thin steel wire diameters cannot be welded, but the clues at the ends cannot be obviously loosened, and burrs must be removed. For multiple springs that need to be welded on the head, the length of the welded part must be less than 3 times. The heating length should be less than one circle, and it should be polished smoothly after welding, and the welded part should be annealed locally at low temperature.
2. The support ring can choose two methods of cold and hot according to product requirements. The spring shall not be heated to sparks and white by heat and method, and the temperature of silico-manganese steel shall not exceed 850℃. The support ring and the effective ring should be in effective contact, and the gap should not exceed 10% of the nominal gap between the rings.
3. The characteristics of multiple springs can be determined by the adjustment guide, and the cable distance can be adjusted when winding. The twisting distance can be 3 to 14 times the diameter of the steel wire, but it is generally best to take 8 to 13 times. The spring force is closely related to the free height, parallel end ring, outer diameter, wire performance, etc., and can be changed by adjusting some of these items or some items.
4. The compression time of the key spring is 24 hours, and the ordinary spring is 6 hours or continuous compression 3-5 times, each time holding for 3-5 seconds. The gap between the spring and the mandrel during pressing is preferably 10% of the diameter of the mandrel. If the gap is too small, it is difficult to operate, and the spring is easy to bend and deform when the gap is too large. One of the springs that broke when pressed, the rest must be processed again.
5. For multiple springs with a large H0/D2 value, attention should be paid to deformation during heat treatment, considering whether to pass through the mandrel, attention to the configuration method, and selection of suitable heat treatment equipment. Under repairable conditions, it can be tempered and hot pressed multiple times to achieve the purpose.
6. The spring surface treatment is generally phosphating treatment, but other treatments can also be carried out. When the coating is zinc and cadmium, the coating is subjected to hydrogen removal treatment after the coating, and 3% (more than 3 pieces) standing treatment is performed again after the removal of hydrogen. The spring must be cleaned of dirt, salt marks, and oxide scale on the surface. The method can be washed with sand blowing and gasoline, but not pickled.
What matters should be paid attention to in spring processing?
1. The surface of the spring produced by the spring manufacturer should not be rough or scratched.
2. The compression spring support ring with the two ends of the spring parallel and flattened is more than three-quarters of the circumference. The thickness of the end is generally more than one-eighth of the diameter of the steel wire. The spring is forged flat at both ends. The thickness of the head is less than one-third of the diameter of the steel wire, and the width is more than seventy of the diameter of the steel wire.
3. According to the application requirements, the unevenness of the spring pitch can be checked. The tolerance is 10% of the pitch, and the minimum tolerance is generally 0.3mm. When the compression spring is compressed to 80% of the full deformation, the spring coils with normal spacing are not Allowed contact
4. The diameter tolerance of the compression spring axis is half of the vertical tolerance.
5. The vertical tolerance between the two end rings of the compression spring and the spring axis is 2.5 minutes of the free height, and the minimum tolerance is 1 mm.
