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The inspection work is very important for custom metal stampings. Next we will share many years of experience, hope will be help.
1, touch test. First wipe the surface with gauze, and then the inspector with a touch of gloves, and along the longitudinal direction of stamping.
2, flexible yarn mesh grinding. With the gauze surface clean, and then use the flexible network to close to the stamping sand surface, and along the longitudinal grinding the whole surface, in order to check whether there is pitting or surface indentation.
3, oil test. With the gauze surface clean, then oil for its entire surface, pay attention to maintain a consistent direction of oil. After the inspection under strong light, if there is pitting, ripple etc.