Analysis of the cold stamping process

Analysis of the cold stamping process

1. Characteristics of cold stamping

(1) It can stamping out parts with complex shapes that are difficult or impossible to process by other processing techniques. For example, from small parts of instrumentation to large parts such as car panels and longitudinal beams, they are all completed by stamping.

(2) The quality of stamping parts is stable and the dimensional accuracy is high. Because the stamping process is formed by the die, the mold manufacturing precision is high, the service life is long, so the quality of the stamping parts is stable, and the interchangeability of the parts is good. The dimensional accuracy can generally reach IT10~IT14 level, and the highest can reach IT16 level, and some parts can meet the assembly and use requirements without mechanical reprocessing.

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(3) The stamping parts have the characteristics of light weight, high strength, good rigidity and small surface roughness.

(4) High productivity. For example, the production efficiency of large stamped parts such as automotive panels can reach several pieces per minute; High-speed stamping of small parts, up to 1,000 pieces per minute.

(5) High material utilization. It is 70%~85% at one time, so the stamping process can achieve less or even no waste production. In some cases, the leftovers can be fully utilized.

(6) The operation is simple and easy to organize production.

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(7) It is easy to realize mechanization and automatic production. Since most of the blanks used in stamping are strips or strips, and they are cold processed, it is easy to realize mechanization and automation in mass production.

(8) Cold stamping is characterized by long manufacturing cycle and high manufacturing cost, so it is not suitable for single-piece small batch production.

2. Classification of cold stamping process

Due to the different shapes, dimensions, and accuracy requirements of stamped parts, there are various methods of cold stamping. According to the deformation characteristics of the material and the current habits of the enterprise, the basic process of cold stamping can be divided into two categories: separation process and plastic deformation process.

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The separation process is a stamping processing method that separates the stamping parts from the sheet metal along the required contour and obtains a certain cross-sectional quality.

The plastic deformation process is a stamping processing method that makes the stamping blank plastically deformed under the condition of not breaking, so as to obtain the required shape and size of the part. In order to improve labor productivity, two or more basic processes are often combined into one process, which is called a compound process.