Stamping is the most widely used processing method in metal processing. Metal stamping refers to a sheet metal mold for steel or non-ferrous metals under room temperature conditions. The pressure required for processing is provided by a press to form a specified shape. So how do hardware stamping manufacturers test the quality of metal stamping parts? The following celebration hardware is for everyone to share.
For metal stamping processing, we must first control the quality of raw materials, inspection time can be divided into the material acceptance and material cleaning, before production inspection and materials. The following five inspection methods can be used to test the stamped parts.
Hardware stampings
First, touch inspection
Clean the surface of the outer cover with a clean gauze. The inspector needs to wear a touch glove to touch the surface of the stamping part along the longitudinal direction of the stamping part. This inspection method depends on the inspector's experience. If necessary, whetstones can be used to polish the suspected area of interest and verify it, but this method is an effective method of rapid inspection.
Second, oil stone polishing
1, first clean the surface of the outer cover with a clean gauze, and then polish with a relatively small amount of whetstone polished with oilstone, arced and hard-to-reach areas
2, the choice of oilstone particle size depends on the surface conditions. It is recommended to use fine-grained whey stone. The direction of grinding of the whetstone is basically in the longitudinal direction, and it fits well on the surface of the stamping part. Part of the special place can also supplement the horizontal grinding.
Third, soft gauze grinding
Clean the surface of the outer cover with a clean gauze. The surface of the stamping part is closely attached to the entire surface by means of a flexible sand net, and any pits and indentations can be easily found.
Fourth, oil inspection
Clean the surface of the outer cover with a clean gauze. Then use a clean brush to evenly apply oil to the entire outer surface of the stamping in the same direction. The stamped parts coated with oil should be tested under strong light. It is recommended to place the stamped parts upright on the body. With this method, it is easy to find tiny pits, ripples, and ripples on stampings.
V. Visual inspection
Visual inspection is mainly used to find abnormal appearance and macro defects of stampings.