With the development of high-tech, the application field of punching machine is more and more extensive. From the early national defense field and aerospace field, it has been extended to the fields of machinery and medical treatment. According to the shape of the material processed, the punching machine is divided into flat plate punching machine, round pipe punching machine, square tube punching machine and U-shaped steel punching machine. According to the needs of different industries, different parts and their thickness, the punching machine is designed Light, professional, bill and factory punching machines, such as enterprises and institutions of full-automatic professional punching machine, personal economic stapler, etc.; now in order to adapt to the trend of the times, to meet the needs of the market, punching machines are moving towards the direction of beauty and efficiency. Today, we will learn about the design requirements of punching machine. < br style = "list style type: none;" / > & nbsp; & nbsp; (1) space requires that the punching machine can process multiple surfaces after the workpiece is installed, so the fixture is required to meet the requirements of space, and each tool can be close to all machined surfaces. In addition, the supporting plate of the fixture moves, supports, sinks and rotates, so the fixture should not interfere with the machine tool. < br style = "list style type: none;" / > & nbsp; & nbsp; (2) quick reset requirement & nbsp; CNC punching machine can change the processing object by changing the processing program quickly. In order to reduce the auxiliary time of changing tooling and the waiting idle time of expensive equipment, the fixture is required to have the function of quick reset or replacement of positioning clamping elements when the processing workpiece is replaced. In addition, due to the multi surface processing in NC machining, the processing time of single piece increases. If the fixture is designed to be able to replace the workpiece outside the working area of the machine tool, the production efficiency can be improved. In order to meet the requirements of relative motion between workpiece and cutter in the coordinate system of machine tool, the workpiece of punching machine should be completely positioned in the fixture, and the base fluid of workpiece should be strictly located relative to the origin of machine tool. At the same time, the fixture should also be fully positioned on the machine tool. Each positioning surface on the fixture should have accurate coordinate size relative to the origin of the machine tool, so as to meet the requirements of positioning and installation in NC machining. Precision requirements: because the punching machine has the characteristics of continuous multi surface automatic processing, the accuracy and stiffness of the stainless steel punching machine fixture are higher than that of the general machine tool fixture, which can reduce the positioning error, clamping error and deformation error in rough machining.