Although pressure regulating springs have the characteristics of high strength and good performance, various problems often occur during the processing of springs. If these problems are not found and solved, they cannot be used normally after production. Therefore, based on the feedback of the company's technical personnel, the editor has sorted out some common problems of pressure regulating springs. You will gain something from reading the article carefully.

1. The support ring can be selected from two methods, cold and hot, according to product requirements. It is not allowed to heat the spring to spark or turn white when using the heating method, and the temperature of silicon 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.
2. The characteristics of multiple springs can be determined by adjusting the lead, and the cable distance can be adjusted as necessary during winding. The twist distance can be taken as 3-14 times the diameter of the steel wire, but generally 8-13 times is preferred. The spring force is closely related to the free height, parallel end ring, outer diameter, and wire properties, and can be changed by adjusting one or more of them.
3. Springs without support rings and springs with wire diameters that are too thin should not have welded spring heads, but the end steel cables should not have obvious looseness and should be deburred. For multi strand springs that require welding of the head, the length of the welding area should be less than 3 times the cable diameter (with a maximum length of 10 millimeters). The heating length should be less than one circle, and it should be polished smooth after welding. During gas welding, the welding area should undergo local low-temperature annealing.
4. The surface treatment of springs generally requires phosphating treatment, but other treatments can also be carried out. When plating with zinc and cadmium, hydrogen removal treatment should be carried out after electroplating. After hydrogen removal, 3% of the sample should be tested for standing treatment, and there should be no fracture during the retest. The spring should be cleaned of surface dirt, salt stains, and oxide scale using methods such as sandblasting or gasoline cleaning, but acid washing should not be used.
5. The compression time for important springs is 24 hours, while for ordinary springs it is 6 hours or 3 to 5 consecutive compressions, each lasting 3 to 5 seconds. The gap between the spring and the core shaft during compression should be 10% of the core shaft diameter. If the gap is too small, it is difficult to operate, and if the gap is too large, it is easy for the spring to bend and deform. If one of the springs breaks during compression, the rest should be reprocessed.
The stress relaxation phenomenon of springs is more severe at high temperatures, which reduces the accuracy of springs and is not allowed for general precision springs. Therefore, these types of springs should undergo relaxation treatment after quenching and tempering.
The article ends here. The processing of pressure regulating springs is related to their effectiveness, so it is important to master the solutions to several common problems introduced in the manufacturer's article. If you want to gain more knowledge, please continue to follow the updates on this website. Thank you for reading.