How to effectively control the quality of automobile stamping parts?

2023-05-09 08:49:23

Hardware and automotive stamping parts are becoming more and more sophisticated, with more and more varieties, and the market scale is expanding. Due to the increasingly high requirements for quality and precision in various industries, how to ensure quality has become a key factor. There are many reasons for poor stamping parts. Unloading may also damage stamping parts. Therefore, details should be fully considered in every link of the entire manufacturing process to avoid quality problems as much as possible.

The scrap rate of automobile stamping parts directly affects the profit margin of stamping parts. The reasons for the high scrap rate of stamping parts are not complicated. The following are some reasons and solutions for the scrapping of stamping parts:

1. Causes:

1. The quality of the purchased steel does not meet the national standard, such as unstable material, out-of-tolerance size, substandard surface precision, etc.; iron powder is produced when the coil is cut; after the coil is cut, there are burrs on the truncated surface; Dirt was attached during transportation.

2. The stamping die is not installed and used correctly;

3. The stamping workers did not strictly install the positioning device to feed during the operation;

4. After the mold is used for a long time, the gap becomes larger or the mold parts are worn out, resulting in waste products; due to uneven stress, poor matching of drawbeads or poor control of the press slider, etc., the r corner of the part or embossing Bending of the part, bending and straining of the workpiece;

5. Due to the huge impact force that the mold needs to withstand during the stamping process, the bolts or other accessories are loosened, which affects the normal production of the entire mold;

2. Solutions:

1. When the stamping factory purchases raw materials, it must strictly install the national standard to choose. When the factory conditions permit, the composition, surface roughness and dimensional accuracy of the steel should be tested. Qualified raw materials are the premise to ensure the quality of stamping parts. When purchasing raw materials, try to choose regular steel dealers or choose products from large steel mills;

2. After the stamping process is designed, the stamping workers must operate in strict accordance with the process regulations during the operation process. Each stamping product has a different stamping process, which requires the manager to formulate a plan for this product before processing the product. process regulations;

3. The punches and stamping dies used in the factory must be guaranteed to be in a stable operating state at all times, and the punches and stamping dies must be regularly maintained and overhauled; the inspection and correction of the drawing dies require regular inspections and repairs. Maintenance to reduce the generation of bumps and maintain a stable state. The usual practice is to use samples to check the bonding scratches of the blankholder ring and the condition of the processed surface (die fillet, punch fillet).

4. Formulate a complete quality inspection regulation. The first batch of products must be fully inspected before formal production, and sampling inspections must be carried out regularly during the production process; the problem that often occurs on the surface of parts in stamping production is unevenness. It is caused by dust or iron filings attached to the surface of the material or mold, which reduces the surface quality of the part and also reduces productivity.

5. Appropriate tools must be used for feeding and picking up parts, so as not to scratch the product;

The above content is about the bad factors and solutions of precision metal stamping parts. Precision metal stamping parts have the characteristics of rich varieties, diverse materials, large batches of automated production, high precision, complex shapes, high technical content and high added value.