Test Methods for Stamping Parts

The followings are the test methods used for stamping parts.

 

Touching 

Use clean gauze to clean up the surface of covering parts. Inspector should put on gloves and touch the surface of stamping parts closely, along with lengthways of stamping parts. The method depends on inspectors’ experience. On occasion, oilstone can be used to polish detected suspected area for verification. Without doubt, the method is a kind of effective fast test methods. 

 

Oilstone polishing 

1. Firstly, use clean gauze to clean up the surface of covering parts, then, use oilstone to polish. Arc and untouchable areas can be polished by using relatively small oilstone. 

2. Granularity of oil stone depends on sure face of stamping parts, such as roughness and galvanization. Oilstone having low granularity is suggest. Polishing direction is basically along with lengthways, and fit with the surface of stamping parts well. Particular area can even be polished sideways. 

 

Flexible gauze polishing

The surface should be also cleaned up by using clean gauze. Use flexible gauze to cling to the surface of stamping parts and polish the whole surface along with lengthways. Any mottling and indentation can be detected easily. 

 

Coating oil

Use clean gauze to clean up the surface of covering parts. Use a clean bush to coat equably oil on the whole surface of stamping parts along with one direction. Test stamping parts having coated under highlight. Tiny mottling, flat ponds and ripples on stamping parts can be detected easily. 

 

Visual test 

Visual test is mainly used to detect abnormal appearance and macroscopic defects of stamping parts.

 

Gauge 

Put stamping parts on gauge. Test the stamping parts according to operation requirements on specification.