Product quality must not be sloppy must be strictly in accordance with the corresponding standard production acceptance, non-standard screw acceptance standards are those? Specifically, the senior manager of the screw factory quality department explained to everyone.
First of all, non-standard screws are also the evolution of GB screws, and we also need to determine the specific inspection items according to GB surface defect standards. In this regard, please refer to the corresponding national standards. If the surface coating or plating affects the recognition of surface defects, Select before the inspection.
Non-standard flat head screws
Second, according to the requirements of the design drawings on the non-standard screw size and material inspection, this should pay attention to the detection of the material, the raw material manufacturers to provide a material certificate report. Second, high-end products must be SGS material certification, as well as send relevant laboratory for analysis of material composition, confirm whether the composition content meets the drawing material requirements.
Once again, the non-destructive inspection is required for the function. If non-destructive inspections are performed on the non-standard screws, if there are any inspections on the quenched cracks on the part, the bearing surface and the following wrinkles, etc., and whether the coating meets the RoSH environmental protection requirements.
Then there is the destructive test, such as non-standard screw hardness level to do the corresponding hardness test; internal hardness, mechanical properties, torque testing, etc. This will damage the non-standard screws, but the strong quality of the screw factory is this Must do test items.