How is the earless snap ring made? Now let’s have a look! Snap ring without ear the manufacturing process mainly includes winding, hook making or two end face processing, heat treatment and process performance test, as well as necessary strong pressure or shot peening and other strengthening treatments.
There are two methods of winding: cold winding and hot winding. The snap spring steel wire with a diameter of less than 8-10mm is used to make the spring with cold coil. The cold coil spring is mostly made of cold drawn excellent * carbon spring steel wire that has been overheated in advance. After being rolled, it is only tempered at low temperature to eliminate internal stress. The hot coil is used when the spring steel wire with larger diameter is manufactured. According to the different diameter of the spring wire, the hot coil temperature is selected in the range of 800-1000 ¡æ. Quenching and tempering treatment should be carried out after rolling.
For important compression springs, in order to ensure that the bearing surface at both ends is perpendicular to its axis, the end ring should be ground flat on a special grinder to reduce the possibility of deflection when loaded; For tension and torsion circlips, hooks shall be made at both ends to facilitate connection and loading. In order to improve the bearing capacity of the spring, strong pressure, strong tension treatment or shot peening treatment can be carried out. The strong pressure treatment of the compression spring is to compress the spring to contact each coil with a load exceeding the elastic limit of the spring material after the spring is rolled, and keep it for 6-48h, so as to produce plastic deformation in the spring wire, and generate residual stress in the spring after unloading. Because the direction of residual stress is opposite to the working stress, the * large stress of the spring in operation is smaller than that of the spring without strong pressure treatment, so the bearing capacity of the spring can be improved. The tension snap ring is subject to strong tension treatment. After the spring is subjected to strong pressure and strong tension treatment, it is not allowed to carry out any heat treatment, and it is not suitable to work at a high temperature of 150-450 ¡æ and long-term vibration, otherwise it will lose the above effect.
For more information about earless circlips, please visit the official website: https://www.lispring.com//
