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一、引言当前国内鲜有对管钳扳手的研究,中华人民共和国住房和城乡建设部行业标准JGJ107-2010《钢筋机械连接技术规程》对管钳扳手的准确度等级提出了明确的要求,必须满足国家计量检定规程JJG707-2014《扭矩扳子检定规程》中5级或10级的要求。但是,在实际日常拧紧或检测中,管钳式扳手的使用往往出现较多的影响量,很少有管钳式扳手能满足规程的要求,示值偏离较为严重。因此,有必要对其偏离原因及校
I. INTRODUCTION There are few researches on the pipe wrench at present in China. The industry standard JGJ107-2010 of the Ministry of Housing and Urban-Rural Construction of the People’s Republic of China stipulates the accuracy requirements of the pipe wrench and must meet the requirements National Metrology Verification Regulation JJG707-2014 “torque wrench test procedures” 5 or 10 requirements. However, the actual daily tightening or testing, the use of pipe wrenches tend to have more impact on the volume, very few pipe wrenches to meet the requirements of the regulations, the indication deviation is more serious. Therefore, it is necessary to deviate from the reasons and school