How are springs made?

Hello, glad to answer your question! \x0d\ Coil springs are short for springs coiled into shape. Coiling springs is the first process of spring manufacturing, but also an important process, the precision of coiling plays an extremely important role in the entire manufacturing process, which basically determines the geometric dimensions and characteristics of the spring as well as the utilization of materials. \x0d\ spring coiling equipment is generally divided into a mandrel coiling spring machine and no mandrel coiling spring machine. The following describes the coiling of springs with a mandrel coiling machine and without a mandrel coiling machine, respectively. \x0d\ Coiling methods include single coiling and multiple continuous coiling. Individual coiling is generally used in the manufacture of strips of spring and oil seal springs, etc.; a number of continuous coiling is once coiled into a series of coil springs, and then cut into individual springs according to the size of each. \x0d\ In order to get the required dimensional accuracy after cold forming, in the spring design, spring process device design and preparation of process procedures, it is necessary to accurately grasp the various types of springs of different materials in the molding of the amount of springback. \x0d\ affect the amount of rebound of many factors, mainly the mechanical properties of the material, the spring coiling ratio and process equipment. \x0d\ rebound amount and the tensile strength of the material fb is proportional to the modulus of elasticity E is inversely proportional to the larger σ / E, the greater the amount of rebound. When the mechanical properties of the material are unstable, the amount of rebound is also unstable. The larger the winding ratio and pitch of the \x0d\ spring, the smaller the plastic deformation, the more unstable the internal stress, and the more difficult it is to control the accuracy of the spring diameter and pitch. Therefore, when coiling springs with large winding ratio and pitch, special attention should be paid to the operation of each process. For example, the speed of reversing should be slow, the handling of coiled spring blanks should be light, in the stress relief annealing before moving as little as possible. For spring blanks with a large spinning ratio, it is best to fix them after coiling and remove them from the mandrel after stress relief annealing at the same time as the mandrel. \x0d\ Hope this helps!