Hardware springs have a wide range of applications such as buffering and vibration reduction. Such as the shock-absorbing springs under automobiles and train carriages, the buffer springs of various buffers, etc.; controlling the movement of the mechanism. Such as valve springs in internal combustion engines, control springs in clutches, etc.; store and output energy. Such as clock springs, gun block springs, etc.; measure the size of force. Such as spring scales, springs in dynamometers, etc. Therefore, the application scenarios of hardware springs are very wide and the prospects are very good.