Punching defects of sheet metal
Punching defects of sheet metal (also called stamping defects) are problems resulting from the processing of sheet metal or in the production process of sheet metal parts. The punching defects of sheet metal mainly include cavity fracture, burr, cracking, folding, hooking, indentation and overhang, which affect the normal quality and performance of sheet metal components.
Punching defects of sheet metal are generally caused by improper die design, improper press selection, insufficient process parameters and inappropriate blanking process, etc. If punching defects of sheet metal occur, it will cause serious consequences. The most common of these are cracking, deformation, and even holes that are too small or too big. It not only increases the production cost, but also produces scrap, leads to the storage of unqualified products, and affects the use of products.
Therefore, it is very important for the organization and control of punching process to guarantee the quality of punching parts. Generally, press processing personnel should take specific measures to guarantee the quality of punch machining and reduce the occurrence of punching defects.
The first is to optimize the design structure and die structure of the punched parts. Reasonably design the shape and size of the tools, process the required standard parts first, and then produce other parts. Moreover, reasonable selection of materials and reasonable control of pressing speed and pressure can improve the quality of components and reduce the occurrence of punching defects of sheet metal.
Secondly, in the punching process, the feedback of stamped parts should be strengthened to effectively deduce some unstable parameters, such as the force and speed of the punching machine, and reasonable understand the process and parameters of the die, so as to improve the molding accuracy and reduce the blanking defects.
In addition, reasonable maintenance and lubrication of the stamping die often affects the quality of stamping parts. In the process of press processing, the gap on the surface between the punch and the die should be maintained at a low, uniform and reasonable level.
Finally, the cooperation of the staff is very important in the punching process. All personnel must be fully trained and understand the basic operation process of the punching machine, establish the correct mental outlook and set correct operation methods, and cooperate closely in the maintenance and debugging of the die and punching machine.
In brief, although punching defects of sheet metal will affect the performance and use of the components, they can be avoided or reduced by reasonable organizational control and reasonable use of the punching machine in the production process.
