Inspection of each process of precision stamping parts
1、 Inspection basis: work instruction for precision stamping parts, customer approved drawings or approved templates, process procedures, etc.
2、 Judgment criteria: product defect classification table, sampling standard, relevant inspection standards, etc.
3、 Inspection items and tools:
1. Appearance inspection: it is generally verified by visual inspection, hand feeling and limited samples.
2. Dimension inspection: generally use calipers, micrometers, feeler gauges and other measuring tools to verify.
3. Structure inspection: it is generally verified by means of puller, torsion device and pressure gauge.
4. Characteristic inspection of precision stamping parts: for example, electrical, physical, chemical and mechanical characteristics, the testing instruments and specific methods are generally used to verify.