In the national production, stamping technology is more and more widely used because of its advantages of saving materials and energy, high efficiency, low technical requirements for operators and products that can not be achieved by mechanical processing through various die applications. Therefore, the fluctuation of the feedback signal will inevitably lead to the reverse adjustment of the speed regulator, which will cause the vibration of the punch. Action status of balancing cylinder and test and inspection of oil circuit and joint of oil lubrication system. Test the accuracy of the whole machine (verticality, parallelism, comprehensive clearance, etc.), and adjust and correct it if necessary. In this state, the locking degree of the connecting rod lock nut must be adjusted in time, because it is related to safety.