1. The bending machine (hydraulic press) processes steel parts into angled straight edges (straight lines). For example, fold a steel plate 90 degrees. Very thick plates can be processed.

2. The crimping machine is used for rounding or processing into linear shapes (curves). For example, a rectangular steel plate with a side length of 3.14*1 meters can be processed into a cylinder with a diameter of 1 meter and a height of 1 meter.

3. Punch machines are used to punch holes or cut steel plates, and are generally used for thin plate processing. For example, make a hole in a board, change the punch to a round one, and use strong impact force to punch out a hole in the board.

The tonnage of bending machines generally includes 400T, 800T and 1250T. The tonnage of crimping machines and punching machines is smaller than that of bending machines, about 300T. Their processing methods are all cold processing.