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Metal stamping parts acceptance criteria

by:Fortuna     2021-02-14
6. 1 acceptable general 6. 1. 1 acceptable defects can't affect the parts assembly and function, otherwise, will be rejected. 6. 1. 2 defect acceptable defines the area 1250 square millimeters maximum acceptable quantity of all kinds of defects. For larger parts surface, the number can be acceptable and the surface contains 1250 square millimeters is proportional to the number, however, cannot be connected to two or more than two defects. 6. 2 defect definition 6. 2. 1 the rainbow effect: galvanized may cause discoloration or 'rainbow' effect. 6. 2. 2 / oxidation rust: exposure to the metal surface chemical reactions in the air. 6. 2. 3 color: the color of the background or anticipated changes, or color is not consistent on the surface of the parts. 6. 2. Scratch: a strip of shallow groove on the surface of the parts. 6. 2. Indentation: caused by sharp objects in the surface of the parts of the trench, nails can feel. 6. 2. 6 mark/flow mark: plating parts due to uneven coating thickness on the surface of corrugated or strip abnormal area. 6. 2. 7: refers to the substrate material of small pit, bending or other marks that still cannot eliminate after coating. 6. 2. 8 dust or grease: in the process of our manufacturing and the smudges on the parts surface ( Not clean) 。 6. 2. Nine spots/sand/wool: coating surface or any unexpected foreign body parts surface. 6. 2. Pits: 10 parts surface crater defects. 6. 2. 11 moulding mark: mark caused by forming mould on the parts surface process, all parts molded mark the location and size are all the same, evenly distributed in forming/bending area. A: metal stamping parts
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