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How to solve the problem of cracks in automobile stamping parts?

In the automotive stamping industry, stamping is sometimes called sheet forming, but it is slightly different. The so-called plate forming refers to the forming method of CNC machining plastic fabrication using plates, thin-walled tubes, thin profiles, etc. as raw materials, which is collectively referred to as plate forming. At this time, the deformation of the thick plate direction generally causes hardware damage and prevention measures.

According to the temperature during stamping, there are two methods: cold stamping and hot stamping. This depends on the strength, plasticity, thickness, degree of deformation and equipment capacity of the material, etc., and the original heat treatment state and end-use conditions of the material should be considered. Any rolled sheet has anisotropic physical properties. If the bending line is the same as the rolling direction, cracks are easy to appear at the bend; if the bending line is perpendicular to the rolling direction, cracks are not easy to appear at the bend.

There are three solutions:

  • 1. If the design allows, choose a softer material;
  • 2. If the design allows, the arc radius of the bending can be increased;
  • 3. When blanking the stamping parts, pay attention to the rolling direction, and try to make the bending line and the rolling direction at a corresponding angle.

The stamping process can be roughly divided into two categories: separation process and forming process (also divided into bending, deep drawing, and forming). The separation process is to separate the stamping part and the blank along the corresponding contour lines during the stamping process, and the quality of the separated section of the stamping part must also meet the corresponding requirements; the forming process is to make the stamping blank plastic deformation under the condition of no damage, And convert it into the required finished shape, and at the same time, it should also meet the requirements of dimensional tolerance and so on.

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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