Punching machine is a kind of press, which is mainly used in sheet metal production. In the production experience, the stamping process saves more materials and energy than the traditional processing, and is more efficient. It can be combined with various moulds to meet the needs of actual production, so it is widely used. For example, in air duct production, it is mainly used to produce TDF corner, TDC corner, cleat etc. Of course, different sheet metal thickness requires different specifications of punches, commonly used punches are 25T and 40T series.