The punching dies for CNC busbar processing equipment can be divided into three types. The punching die of turret CNC busbar processing equipment is used to process various specifications of copper bar, an aluminum bar, and other bus bars. As long as in the corresponding processing unit. The bus bar can be punched separately, which is matched with the CNC busbar processing. Specifically, there are several structural types, such as circular and elliptical. The punching die of the copper aluminum busbar is durable, with high punching precision and a smooth surface. Maintenance of manual busbar processing machine and CNC busbar processing . The moving parts of punching, shearing, and bending units should be coated with lubricating oil before the shift, once in the morning and afternoon. The worktable and each unit shall be oiled before work. The punching die should be coated with lubricating oil once every 20 times of operation. A lubricating oil should be applied once every 20 working