What are the inspection methods of stamping parts

Touch inspection of stamping parts

Wipe the surface of the outer covering with clean gauze. The inspector should wear touching gloves and touch the stamping parts lengthwise close to the surface of the stamping parts. This inspection method depends on the inspector's experience. If necessary, the suspected area can be polished with oil stone and verified, but this method is an effective and rapid inspection method.

The stamping parts are polished with oil stone

1. First wipe the surface of the outer covering piece clean with clean gauze, and then polish the oil stone (20×20×100mm or larger). The place with circular arc and the place that is difficult to reach is polished with relatively small oil stone (such as :8×100mm semi-circular oil stone).

2, the choice of stone size depends on the surface condition (such as roughness, galvanized, etc.). A fine-grained whetstone is recommended. The direction of the oil stone grinding is basically along the longitudinal, and it fits the surface of the stamping part well. Some special places can also supplement the transverse grinding.

Flexible mesh grinding for stamping parts

Wipe the surface of the outer covering with clean gauze. With flexible sand mesh close to the surface of the stamping parts along the longitudinal grinding to the whole surface, any pitting, indentation will be easily found.

Stamping parts oiling inspection

Wipe the surface of the outer covering with clean gauze. Then apply oil evenly in the same direction with a clean brush to the entire outer surface of the stamping part. Put the oiled stamping part under a strong light for inspection. It is suggested to erect the stamping part on the position of the body. With this method, it is easy to find the tiny pitting points, dents and ripples on the stamping parts.

Visual inspection of stamping parts

Visual inspection is mainly used to find the abnormal appearance and macroscopic defects of stamping parts.

Inspection of stamping tools

Put the stamping part into the gage and test the stamping part according to the operation requirements of the gage instruction.

Safety production of stamping parts

In the actual production, the technology test similar to the stamping process is commonly used, such as deep drawing performance test, swelling performance test and so on to check the stamping performance of materials, so as to ensure the quality of finished products and high pass rate.

The precision and structure of die directly affect the forming and precision of stamping parts. Die manufacturing cost and life are important factors affecting the cost and quality of stamping parts. Die design and manufacturing requires more time, which prolongs the production preparation time of new stamping parts.

The standardization of die base, die stand and guide parts and the development of simple die (for small batch production), compound die, multi-station progressive die (for mass production), as well as the development of rapid die changing device, can reduce the stamping production preparation workload and shorten the preparation time, can be applied to reduce the stamping production preparation workload and shorten the preparation time, can be applied to mass production of advanced stamping technology The technique can be reasonably applied to small batch multi - variety production.

Stamping equipment in addition to the thick plate with hydraulic forming machine, generally use mechanical press. Conveying machinery and mold library and rapid mold change device, and the use of computer program control, can be composed of high productivity automatic stamping production line.

In the production of dozens or hundreds of stamping parts per minute, in a short time to complete the feeding, stamping, parts, waste discharge and other processes, often occur personal, equipment and quality accidents. Therefore, safety production in stamping is a very important problem.

General workpiece in the stamping process, because of the stamping process, especially in the cold forging stamping process, the temperature will soon rise, must add lubrication products lubrication, if do not use lubrication and direct stamping, welding - assembly, the surface of the parts without oil for welding and assembly. The research and practice show that the application of Ameco metal inert gas arc welding, tungsten gas shielded arc welding and resistance welding has good results.