Stamping parts for Geely Car are becoming more and more sophisticated, with more and more varieties, and the market size is expanding. As various industries have increasingly higher requirements for quality and precision, how to ensure quality has become a key factor. There are many reasons for poor stamping parts. The selection of stamping materials and stamping operations and on-site equipment loading and unloading may also damage stamping parts. Therefore, in The entire manufacturing process should fully consider the details and try to avoid quality problems.
1. Reasons
① The quality of the steel purchased does not meet national standards, such as unstable materials, poor dimensions, and surface accuracy that does not meet standards, etc.; iron powder is produced when the coil is cut; there are burrs on the section after the coil is cut; there is dirt when the plate is stored or transported.
② Improper installation and use of stamping dies;
③ During the operation, the stamping workers did not strictly install the positioning device to feed the material;
④ After the mold is used for a long time, the gap becomes larger or the mold parts are worn, resulting in waste; due to uneven stress. Poor matching of tensile ribs or poor control of the compressor slider causes the R-angle or embossed part of the part to be bent. Parts twist.
⑤ Since the mold needs to withstand huge impacts during the stamping process, bolts or other accessories may become loose, affecting the normal production of the entire mold;
2. Solutions
① When purchasing raw materials, stamping factories must strictly comply with national standards for selection. Where factory conditions permit, the composition of the steel should be tested. Surface roughness. Dimensional accuracy. Qualified raw materials are the prerequisite for ensuring the quality of stamping parts. When purchasing raw materials, try to choose products from regular steel dealers or large steel plants;
②After the stamping process design is completed, stamping workers must strictly follow the process rules during the operation. Each stamping product has a different stamping process, which requires managers to formulate the process rules for this product before processing the product;
③The punches and stamping dies used in the factory must always maintain stable operation, and the punches and stamping dies must be regularly maintained; the inspection and correction of the drawing dies require regular inspection and maintenance to reduce the occurrence of convexity and maintain a stable state. A common practice is to use samples to check the bonding scratches and machined surface of the blank holder.
④ Develop a complete quality inspection charter. The first batch of products must be completely inspected before formal production, and sampling inspections are carried out regularly during the production process; a common problem on the surface of parts in stamping production is unevenness, mainly due to dust or iron filings attached to the surface of the material or mold. , reducing the surface quality and production capacity of the parts.
⑤Appropriate tools must be used for feeding and picking up to avoid scratching the product.