Stamping processing is to rely on presses, hydraulic presses, forging presses and molds to apply external force to plates and strips (copper sheets, brass sheets, cold-rolled iron sheets, aluminum sheets) to cause plastic deformation or separation to obtain the desired shape. and dimensions of semi-finished products. The stamping finished product is the first process flow, and the lines, letters, and patterns must be clear and complete, and the size must be accurate.