[Analysis of quality objection to the defect of collapsed knife]
The customer purchased a batch of stainless steel plates and found that the edges of these plates were abnormal when they were ready to use, which has seriously affected the use of the plates.
After the supplier receives the complaint, it immediately arranges a technician to inspect it at the customer. After the on-site inspection by the technicians, it was found that a convex residue appeared on the edges of this batch of plates for a certain distance, with obvious periodicity, with a period of about 1067mm. This cycle is consistent with the cycle of cutting edges with disc shears.
It can be confirmed that the quality objections of this batch of flat plates were caused by the cutting and cracking of the disc.
Anyone who knows the processing knows that during the high-speed shearing process, due to some abnormal factors or insufficient strength, the cutting edge of the disc shears will collapse and small gaps will appear. When the stainless steel strip passes through these small gaps, the shear will appear. An undesirable phenomenon that causes the incision to bulge in the direction of the notch.
If you find the phenomenon of knife collapse during edge trimming, you can choose to cut in the middle, rewind the cut part, and change the knife midway. However, if shearing is not allowed (customers may require that the weight of each roll must reach a certain amount), and the cracking phenomenon is not very serious, you can also choose to continue processing.
All in all, these choices depend on customer requirements. Some customers take the board back for blanking, there will definitely be leftovers, so there is no high requirement on the edge, and some customers take it back and require edge welding, and the requirement for the edge is higher. If the above defects are not allowed, then processing cannot be continued.