Defects In Sheet Metal Drawing

The surface unevenness is mainly caused by the unqualified stamping die.

Defects in sheet metal drawing.

Surface quality plays a very important role in sheet metal forming parts. The flange of the blank undergoes radial drawing stress and tangential compressive stress during the stamping process which sometimes results in wrinkles. Excessive thinning in areas of the sheet metal is also an unwanted defect. 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.

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. This defect is caused by improper punch die clearance and poor lubrication. Excessive thinning thickening of the sheet during forming. Defects in drawing process.

Wrinkles splits and springback are the three most common defects encountered during sheet metal stamping. Springback or final part deviation from nominal incorrect process or number of forming tools. This defect is caused by non uniform yielding of metal due to non uniform forces. These defects include draw marks burnishing step rings etc.

Incorrect blank shape and or size. This defect is caused by the anisotropy of the sheet metal. Defects that occur during deep drawing of sheet metal can be controlled by careful regulation of process factors.