The grinding capacity of 10 tons punch die is certain, if the value is reached, the punch will be scrapped. If continue to use, easy to cause mold and machine damage outweighs the loss. When replacing the die and blade die, pay attention to safety before and after starting the equipment to prevent damage to the equipment, die and human body. 10 tons of punch die should be regularly cleaned and lubricated. Different plate thickness and different materials should be used for different clearance under the die, the clearance is too small to chew the die, too large burr. Different material moulds should be used for different material plates, such as stainless steel and aluminum copper plates, special steel should be used. To regularly check the coaxial punch up and down the mold seat, the mold is not correct, easy to unilateral bite mold or broken mold. The forming mold should be the striking head from the lowest Ken upward fine tuning to the appropriate position, otherwise, it is easy to cause a break mold.