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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.
Automotive Sheet Metal Fabrication

Pintejin Sheet Metal shop offers a cost-effective solution for a wide range of industries with our custom metal stamping and custom sheet metal fabrication capabilities. Our stampnig operations include a variety of sheet-metal forming manufacturing processes, such as punching, blanking, embossing, bending, flanging, and coining. Our professional, experienced and well-trained engineers can execute the complex metal stamping operations with precision and accuracy.

No matter what your metal fabrication needs are, Pintejin can offer the right solution: from single sheet metal part or sub-assembly of stamped metal parts to turnkey solutions for mechanical and electrical assemblies. We have the technology, equipment and the experience to fabricate customised metal products from aluminium sheet metal fabrication, steel, zinc plated steel, stainless steel sheet metal fabrication, brass and copper. Designs that require CNC machining of surfaces or components can be accommodated. We can supply polished, galvanized, zinc coated or powder coated finishes for any sheet metal work or stamped metal components. Coupled with our accurate and reliable metal fabricating equipment, we guarantee precision and repeatability in custom sheet metal work. You’ll be taking advantage of the best sheet metal fabrication china can produce.


With Pintejin automated and highly streamlined sheet metal fabrication service, you can expect a sheet metal fabrication quote within 12 hours and lead times as quickly as three days.Our rapid prototyping offering also includes a solid and reliable manufacturing capability (led by our expert team with 15+ years of experience) and technical and quality assurance, including SGS and RoHS material certifications, in-process quality reports, and First Article Inspection.



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