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介绍了HB 6999的修订背景和主要内容,对“最小拧紧力矩”和“最大拧紧力矩”术语的含义以及“拧紧力矩”和“扳拧角度”两种工艺方法进行了详尽说明,并对实施该标准过程中可能遇到的问题提出了解决的办法和应采取的措施。
The revised background and main contents of HB 6999 are introduced. The meanings of the terms “minimum tightening torque” and “maximum tightening torque”, as well as the “tightening torque” and “wrench angle” are described in detail. Possible problems encountered in the standard process put forward solutions and measures to be taken.