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Analyze the causes of wrinkling and cracking of deep-drawn stamping parts?

Postview: 613 Date: June 1, 2020

China Dalilai Mfg is Engaged in deep drawing stamping processing for 15 years.

When the stamping parts processing factory processes the deep drawn stamping parts, the problems that are easy to appear are: the wrinkling of the flange deformation area and the pulling of the cylinder wall force transfer area;

What is wrinkling in the flange area?
It is the bending caused by the loss of stability of the sheet due to tangential compressive stress;

What is cracking in the power transmission area?
It is caused by the tensile stress exceeding the tensile strength of the sheet material fracture;

The wrinkling of the flange deformation area is mainly due to;

1. The size of the tangential compressive stress σ3, the larger the more likely to be unstable wrinkling;
2. The ability of the sheet material in the flange area to resist instability;

The larger the flange width and the thinner the thickness, the smaller the elastic modulus and hardening modulus of the material, and the smaller the resistance to instability;
The cracking of the cylinder wall mainly depends on the following two;

1. Anti-stress in the cylinder wall force transfer area;
2. The tensile strength of the cylinder wall force transfer area;

When the tensile stress of the cylinder wall exceeds the tensile strength of the cylinder wall material, the deep-drawn stamping part will break at the corner of the bottom where the corner is tangent to the cylinder wall-“dangerous section”;

Dalilai Mfg has rich experience in sheet metal die stamping services, can provide high-quality deep drawn stamping processing services.

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