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.

This defect is caused by improper punch die clearance and poor lubrication. Tearing is one of the most common defects. These defects include draw marks burnishing step rings etc. Excessive thinning thickening of the sheet during forming.

Wrinkles splits and springback are the three most common defects encountered during sheet metal stamping. Incorrect blank shape and or size. The surface unevenness is mainly caused by the unqualified stamping die. Springback or final part deviation from nominal incorrect process or number of forming tools.

The flange of the blank undergoes radial drawing stress and tangential compressive stress during the stamping process which sometimes results in wrinkles. 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. Defects in drawing process. Excessive thinning in areas of the sheet metal is also an unwanted defect.

This defect is caused by non uniform yielding of metal due to non uniform forces. 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. Causes of these are mostly too high or improper force distribution and material considerations.