SL1 (semi-closed high-precision connecting rod punch)-widely used in electronics, communications, computers, household appliances, furniture, transportation (automobiles, motorcycles, bicycles), metal parts and other stamping and molding. It is suitable for precision continuous die processing. Without the drawback of opening throat of type C punching machine frame, it can save the maintenance cost of die. High steel frame can ensure long-term stability and precision, high safety, high affinity, Multifunctional electronic control system. Can be matched with a variety of automatic peripheral equipment, easy to operate. Connecting rod transmission mechanism, with the characteristics of rapid drop, slow processing, rapid recovery. Mold with flexible slow contact, greatly reduce vibration, Noise and high heat, extend die life, and improve die punch accuracy and yield, improve die life, stamping parts and finished product yield.