Defects In Sheet Metal Drawing

Defects that occur during deep drawing of sheet metal can be controlled by careful regulation of process factors.

Defects in sheet metal drawing.

The flange of the blank undergoes radial drawing stress and tangential compressive stress during the stamping process which sometimes results in wrinkles. Excessive thinning thickening of the sheet during forming. The surface unevenness is mainly caused by the unqualified stamping die. This defect is caused by improper punch die clearance and poor lubrication.

Surface quality plays a very important role in sheet metal forming parts. Tearing is one of the most common defects. One of the primary defects that occurs in deep drawing operations is the wrinkling of sheet metal material generally in the wall or flange of the part. These defects include draw marks burnishing step rings etc.

Defects in drawing process. This defect is caused by the anisotropy of the sheet metal. Rebond team of expert engineers rely on their professional knowledge and extensive experience to perform comprehensive analysis of following 6 common defects in sheet metal forming. This defect is caused by non uniform yielding of metal due to non uniform forces.

Excessive thinning in areas of the sheet metal is also an unwanted defect. Causes of these are mostly too high or improper force distribution and material considerations. Figure a wrinkling in the flange or b in the wall c tearing d earing e surface scratches basic press working operation sheet metal working is also a metal forming operation where the material being worked is in the form of sheets the working is usually at room temperature.