How to detect the quality of a stamping parts?

A, touch test with a clean gauze to clean the surface of the outer covering parts. Inspector need to wear the touch gloves along the longitudinal pressing close to touch on the surface of the stamping, the inspection method depends on the checker's experience. Abrasive grinding if necessary by detection of suspicious areas and verified, but this method is an effective method of quick inspection. Second, oil stone grinding 1, first of all, with a clean gauze will clean the surface of the outer covering parts, and then polished with oil stone ( 20× 20× 100 mm or larger) , have the place with circular arc and hard-to-reach places with relatively small abrasive polishing ( For example: 8 & times; 100 mm semicircle sharpening stone) 2, selection of abrasive particle size depends on the surface condition ( Such as roughness, galvanized, etc. ) 。 Suggest using fine-grained whetstone. Oilstone grinding basically along the longitudinal direction, and a good joint on the surface of the stamping parts and some special place can also supplement horizontal grinding. Three, flexible gauze grinding with a clean cloth to clean the surface of the outer covering parts. With flexible sand nets to stamping surface along the longitudinal grinding to the surface of the whole, any pitting, indentation can easily be found. Four, oil test with a clean cloth to clean the surface of the outer covering parts. Again with a clean brush oil evenly across the same direction to the stamping parts of the outer surface. Under the strong light of pressing finish coating oil test, suggested that the vertical pressing on the body position. Using this method can be easily found on the stamping of slight pitting, pond, flat ripple. Five, the visual inspection visual detection is mainly used to detect the appearance of the stamping parts and macroscopic defects. Six, submit the test will be stamping into fixture, fixture based on manual operation requirements, to test the stamping parts. In this paper, starting from the original, if reprint please indicate the source and the author