Pneumatic punch 160 tons can be overloaded. According to the relevant technical standards of the press, the press has a certain overload (overload) ability. The pressure of the rigid bursting safety block is 1.25 times greater than the nominal force, and the unloading force of the hydraulic overload safety device is 1.05 ~ 1. 1 times greater than the nominal force, so the punch is overloaded to some extent. Note that in order to increase the overload force of the punch, this customer adjusted the unloading force of the overload pump without authorization and replaced the safety block. However, if the main components (fuselage, slider and crankshaft) are damaged, the main engine factory will not carry out three guarantees.