The reasons for the concave and convex metal stamping parts are mostly caused by the dust or iron filings attached to the appearance of raw materials or molds. It makes the appearance of products low in character and also makes the productivity drop dramatically. So how can we avoid this problem? The following is based on the practice to summarize the following five methods to reduce the concave and convex metal stamping parts.
Five methods to reduce the concave and convex stamping parts:
- drawing die inspection and correction: drawing die need to do regular inspection and maintenance, in order to reduce the production of concave and convex and maintain a stable state. The usual practice is to use the sample to check the bonding scratch and machining surface (die fillet, punch fillet).
- Inspection and correction of shear die: the reason for convex and concave after the shearing process is that iron powder is produced in the shearing process, so iron powder must be observed before stamping to avoid the occurrence of convex and concave.
- appropriate manipulator speed: for semi-automatic drawing die production, when the drawing punch in the lower die position, the manipulator speed is very fast, the burr will fall in the upper part of the punch, causing convex and concave. In order to avoid this problem, we can do the discharging test of the parts before production, reasonably set the speed and discharging Angle of the manipulator, so that it will not meet the parts and the lower die.
- check the truncation surface: truncation roll, truncation die wear and damage will produce a lot of tiny iron powder attached to the edge, so before stamping production must be in the material area or punching line check double truncation surface, and cleaning sheet to remove burr.
- Inspection of sheet cleaning device: before stamping production, it is necessary to check and repair cleaning and settling at the same time, so that it may be more effective in cleaning sheet material, which is also very necessary, and it is necessary to pay attention to the quality of the roller gap and cleaning oil. The detailed method is to coat a steel plate with red paint and make it clean and settle. At present, check the shape of the former cause of the red paint being withdrawn. Assuming that the removal rate is not up to standard, it is necessary to check and repair the cleaning and settling. Cleaning oil shortage must be timely
