Use a dial indicator to move the slider and the bottom of the task table vertically and horizontally, and calculate the area through the measured values. A punch is a punch. In national production, stamping technology has been more and more widely used because of its advantages of saving materials and energy, high efficiency, low technical requirements for operators and products that cannot be machined through various molds. Stamping production is mainly aimed at sheet metal. Blanking, punching, forming, stretching, trimming, fine punching, shaping, riveting and extrusion can be carried out through the die, which is widely used in various fields.