Defects In Sheet Metal Drawing

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

Defects in sheet metal drawing.

Wrinkles splits and springback are the three most common defects encountered during sheet metal stamping. These defects include draw marks burnishing step rings etc. 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. 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.

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. This defect is caused by non uniform yielding of metal due to non uniform forces. This defect is caused by improper punch die clearance and poor lubrication. Defects in drawing process.

Incorrect blank shape and or size. Tearing is one of the most common defects. Causes of these are mostly too high or improper force distribution and material considerations. Surface quality plays a very important role in sheet metal forming parts.

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. Excessive thinning thickening of the sheet during forming.