< P style = "text indent: 2em;" > the three side punching of channel steel can add typing and cutting functions according to the actual needs, so it can meet the needs of users in various aspects of production. The following is about the structural characteristics of the channel steel three side punch. < br / > 1. The main machine adopts a closed structure, which is composed of the main and auxiliary bed. The main bed is fixed. There is a light and light bed structure inside, on which are installed a mold library and a stamping oil cylinder. The impact pressure is directly transmitted to the main bed through the oil cylinder and the lower die base, and the high rigid main bed bears the impact pressure. The movement of the auxiliary bed is rolling friction, the ball screw is directly driven, and the moving speed is fast, up to 50m / min. < br / > 2. The hydraulic system is a double pump and double pressure system, and the main oil cylinder is a composite structure. The size of the impact pressure is determined according to the size of the punching hole, which not only improves the efficiency, but also has great benefits to the stress of the whole bed. < br / > 3. The longitudinal beam feeding clamp is a floating structure, which avoids the large external force on the clamp due to the bending deformation of the beam itself. The clamp has the function of automatic collision avoidance, so that there is no dead zone in longitudinal beam processing. < br / > 4. The mold structure is turret mold library, which is a mature mold structure commonly used by CNC punch at that time, which is easy to maintain and easy to assemble and disassemble.