What are the characteristics of thinning and stretching of automobile stamping parts?
Stamping parts are often seen in our daily life, but when we use them, there will be the phenomenon of stamping parts waste, so how can we avoid them?
We need to select suitable raw materials, and then cooperate with the corresponding technology to manufacture. Of course, we must strictly implement the process, and we cannot make mistakes in any environment, otherwise it is easy to produce waste products. Secondly, for the machinery and equipment for manufacturing stamping parts, such as presses and dies, it must be ensured that they work in a normal environment without failure. After passing the qualification, the work of the day can be officially started, so that in the event of an accident, it can be dealt with in time and reduce the generation of waste. In production, it must be produced in a civilized manner. If the stamping parts are placed casually, it is easy to cause scars on the surface of the workpiece and affect the quality; after production, they should be neatly placed in the mold.
What are the characteristics of thinning and stretching of automotive stamping parts:
- 1. The gap between the concave and convex dies is smaller than the thickness of the blank, and the straight wall part of the blank is pressed when passing through the gap, resulting in a significant thinning phenomenon, which increases the height of the sidewall, so it is called thinning stretching.
- 2. The quality of the thinned and stretched parts is high, the wall thickness is relatively uniform, the wall thickness deviation is within ±0.01mm, and the surface roughness Ra value is below 0.2um. And due to the two-way compression, the grains are fine and the strength is improved.
- 3. The residual stress of the thinned tensile parts is relatively large, and some even crack during storage, which can be eliminated by low-temperature tempering.
- 4. There is no wrinkling problem (compared with non-thinning stretching), and no blank holder is required.
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