Common problems and reasons of sheet metal processing and stamping processing

1-Burr: Sheet metal stamping process or right angle full process of unnecessary raw materials and not thoroughly left, thick steel plate under the cross-section occurs burr. When the relative height of burr exceeds 0.2mm according to the cross section, the fan will destroy the die and cause convexity and concavity.

2-Convexity: Abnormal convexity occurs in the sheet metal surface, which is also due to uncoiling beneficial lines.

3- Dirt (iron pin and dust) in the sheet metal caused by mixing. Roll marks: This is caused by dirt adhering to the cleaning rollers or the infeed rollers (fixed immovable knuckle diameter). Generally, the dirt from the roll print on the printing paper can be removed.

4-Skid marks: sheet because of the roller.

5-Rolling, skid marks occur when the roller suddenly pauses or accelerates. Hot rolled strip crushing is likely to cause wrinkling at the edges: the guide rolls on the unrolling beneficial web are likely to cause wrinkling because of the small spacing between the guide rolls on the die, also because of the hot rolled strip.

6-Feeding imbalance caused by. Scratching: The primary factor for parts scratching is sharp scars on top of the die or metal material soot falling into the die. Preventive measures are grinding and polishing the scars on the die and eliminating metal material dust.

7-bottom crack: The primary factor for the bottom of the part to crack is the poor plasticity of the raw material or the pressure of the mold wrap-around strip ring is too tight. The preventive measure is to remove and replace the raw material with good plasticity or to loosen the edge banding device.

8-Wrinkling of the outer wall: The primary factor for wrinkling of the side wall of the sheet metal is the lack of thinness of the raw material (if the relativity is small, the thinness is allowed to be thin) or the occurrence of axial force in the assembly process of the left and right molds, resulting in a large gap on one side and a small gap on the other side. The preventive measure is to immediately remove and replace the raw material and adjust the mold again.