How to check the quality of metal stamping parts?

For metal stamping processing, we must first control the quality of raw materials. The inspection time period can be divided into material acceptance and material cleaning, pre-production inspection and materials. Next, the stamped parts can be inspected by the following five test methods.

First, touch test

Wipe the surface of the outer cover with clean gauze. The inspector is required to wear a touch glove to touch the stamped surface along the longitudinal direction of the stamping. This method of inspection depends on the inspector's experience. If necessary, oil stone can be used to polish and detect the suspected area, but this method is an effective and quick method.

Second, oil stone polishing

1. First wipe the surface of the outer cover with clean gauze, then polish with oil stone, place with arc and hard to wear with relatively small oil stone.

2, the choice of oil particle size depends on the surface condition. Fine-grained oilstone is recommended. The direction of the stone grinding is basically in the longitudinal direction, and it fits well with the surface of the stamping part, and some special places can also complement the lateral grinding.

Third, the flexible gauze grinding

Wipe the surface of the outer cover with clean gauze. The surface of the stamping part is sanded to the entire surface in a longitudinal direction by a flexible sand net, and any pitting and indentation can be easily found.

Fourth, oil test

Wipe the surface of the outer cover with clean gauze. Then use a clean brush to evenly apply oil to the entire outer surface of the stamping in the same direction. The oil-coated stampings are placed under strong light and it is recommended that the stamped parts be placed in the body position. With this method, it is easy to find tiny pittings, ponds, and corrugations on the stampings.

V. Visual inspection

Visual inspection is mainly used to find the appearance abnormalities and macro defects of stamping parts.