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随着我国引进技术的不断扩大,英国惠氏螺纹标准 84:1956B.S.W 粗牙螺纹和 B.S.F细牙螺纹、牙型角为53°的圆牙螺纹已逐步在国内采用。而国内过去采用的英制螺纹螺纹公差大、牙型接触高度小,实际使用中连接强度很差,松动现象严重。近几年引进的产品图纸中已发现采用了惠氏 B.S.W,而有些技术人员误认为仍采用英制螺纹。致使连接件达不到使用的目的。为此,本文把两者的区别详尽地作一介绍。
With the continuous expansion of China’s introduction of technology, the British Whitworth thread standard 84: 1956B.S.W coarse thread and B.S.F fine thread, tooth angle of 53 ° of the round thread has been gradually adopted in the country. The domestic used in the past, the British thread thread tolerance, tooth-type contact height is small, the actual use of poor connection strength, loose serious. In recent years the introduction of the product drawings have been found using Wyeth B.S.W, while some technicians mistakenly believe that still use the British thread. Resulting in the use of connectors to reach the purpose. Therefore, this article makes a detailed introduction of the difference between the two.