What details should be paid attention to when performing surface treatment on sheet metal parts?
Release time:
2025-11-26
The sheet metal stamping process is suitable for punching, blanking, and chamfering operations on cabinet structures such as silent cabinets and distribution cabinets. Punch presses: The appropriate tonnage of punch press should be selected based on the punching force required for the workpiece. The dies used must pass inspection and be deemed合格 before they can be put into service.
The sheet metal stamping process is suitable for punching, blanking, and chamfering operations on cabinet structures such as silent cabinets and distribution cabinets. Punch presses: The appropriate tonnage of punch press should be selected based on the punching force required for the workpiece. The dies used must pass inspection and be deemed qualified before they can be put into service.
Strictly implement first-piece inspection, intermediate spot checks, and final-reinspection. Workpiece dimensions shall be inspected according to the drawings or process documents. The edges of punched holes should not exhibit stretching or bending, and the height of burrs should not exceed 10%–15% of the material thickness.
During the trial run, verify the safety and reliability of mechanical and electrical performance. Parts requiring machining must pass inspection in the preceding process before being processed. Before machining begins, clearly define the technical requirements and check carefully to ensure that there are no errors in the incoming materials. Also, make sure to select the appropriate die according to the machining requirements. First, bring the punch slide to its top dead center, insert the upper die into the slide’s die holder groove, and ensure it is properly aligned and flat. Then, tighten the screws and set screws securely—there must be no gap between the upper die and the bottom surface of the slide.
Wipe the bed surface clean, removing all oil stains and iron filings. Then, place the lower die module onto the punch press table. Start the machine by jogging or manually turning the flywheel to bring the slide down to the bottom dead center and fully insert it into the lower die. Adjust the connecting rod height to ensure that the die stroke is appropriate. Set the clearance between the upper and lower dies so that the clearance around the perimeter is uniform. Press and flatten the clamping plate of the lower die module; make sure that the shims are at the same height as the base die plate, and that the fixing points are symmetrical. Tighten the connecting rod and check whether the die assembly is secure and free from any looseness. Perform a trial punch using the material to verify that the cross-section is neat, uniform, and consistent. Adjust the die plate according to dimensional requirements, establishing both the vertical reference (front-to-back) and the horizontal reference (left-to-right). Be aware that during machining, the material must be tightly pressed against the die plate and laid flat on the base die. When punching holes or chamfering edges, pay close attention to the direction of machining to avoid errors. After completing the machining, arrange the finished parts neatly in separate categories and clearly label them.
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