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由于产品防蚀的要求,多数的螺纹零件必须进行防蚀电镀处理,并要求螺纹在电镀后保证其装配性(滑配合)。我厂过去的生产方法是:内螺纹不扣除镀层余量,用标准丝锥攻制;外螺纹扣除四倍镀层厚度的余量。虽已采取了这一措施,但还没有彻底解决螺纹旋合的问题。因设计图纸中出现相结合的内外螺纹镀层厚度不一致,表面处理按资料要求电镀和工人凭经验操作,镀层厚薄不均,
Due to the corrosion protection requirements of the products, most of the threaded parts must be treated with anticorrosive plating and require the threads to ensure their assembly (slip fit) after plating. My factory in the past production methods are: internal thread does not deduct coating margin, tapping tapping standards; external thread deduction four times the thickness of the coating thickness margin. Although this measure has been taken, the problem of screwing has not been completely solved yet. Due to the design drawings appear in a combination of internal and external thread coating thickness is inconsistent, surface treatment according to the information requirements of electroplating and workers with experience in operation, uneven coating thickness,