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How To Test The Quality Of Stamping Parts
Nov 16, 2017

Touch test

Clean the surface of the outer covering with clean gauze. The inspector should wear touch gloves and touch the stamping surface vertically along the stamping piece. This method depends on the experience of the inspector. If necessary, the suspicious area can be polished and verified by the whetstone, but this method is an effective and fast test method.


Two, Whetstone grinding

1. First clean the surface of the outer covering with clean gauze, then polish it with Whetstone, where there is arc and where it is difficult to touch, polish with relatively small whetstone

2. The choice of the size of the whetstone depends on the surface condition. Fine grained whetstone is recommended.  The grinding direction of the whetstone is basically along the longitudinal direction, and it fits the surface of the stamping parts well. In some special places, the transverse grinding can be added.


Three, flexible yarn grinding

Clean the surface of the outer covering with clean gauze.  Close to the stamping surface along the longitudinal grinding to the entire surface with a flexible screen, no pitting, indentation can be easily found.


Four, oil inspection

Clean the surface of the outer covering with clean gauze.  Then clean the entire surface of the stamping piece evenly with the clean brush in the same direction. The stamping parts coated with oil are put under strong light. It is suggested that the stamping parts should be vertical to the body position. This method can easily find stamping on the tiny pits, dent, corrugated.


Five visual inspection

Visual inspection is mainly used to find out the appearance abnormity and macro defect of stamping parts





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