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Which step is performed first for punching and bending of automotive stampings?

A large number of cold stamping processes are used in the production of automobile stamping parts, which is suitable for the needs of multi-variety and mass production of automobile stamping parts. In medium and heavy-duty vehicles, most of the cover parts such as body outer panels, and some load-bearing and support parts such as frame, carriage and other auto parts are auto stamping parts. The steel used for cold stamping is mainly steel plates and steel strips, which account for 72.6% of the steel consumption of the whole vehicle. The relationship between cold stamping materials and the production of automobile stamping parts is very close. The quality of the materials not only determines the performance of the product, but also directly affects the production. The process design of the automobile stamping process affects the quality, cost, service life and production organization of the product, so the rational selection of materials is an important and complex task.

Cold stamping of stamping parts, from a professional point of view, refers to the use of a die on a press to apply a certain pressure to the material to separate or plastically deform it, thereby obtaining the desired finished product. The two processes of punching and bending, generally speaking, are punched first and then bent to facilitate the fabrication of CNC punching machines. However, in some special cases, it is necessary to bend and then punch.

On stamping parts, the number of processes generally refers to the number of repetitions of processes of the same nature. Therefore, under the premise of ensuring the quality of stamping parts, the number of processes should be minimized, so as to improve the production efficiency of the workpiece and improve its economic benefits. Moreover, this requirement must be strictly implemented, and there should be no sloppy and lax actions to ensure the above-mentioned effects.

When selecting materials, first, according to the type of automobile stamping and the characteristics of use, metal materials with different mechanical properties are selected to achieve the purpose of not only ensuring product quality, but also saving materials.

Usually, the following principles should be followed when selecting materials for automotive stamping parts:

  • a The selected materials should first meet the performance requirements of auto parts;
  • b The selected material should have good process performance;
  • c The selected material should have good economy.
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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