摘要
针对洛氏硬度实验中,测量不确定分量及影响测量质量的因子较多,采用鱼骨图分析法,从“人、机、物、法、环”五个方面来确定洛氏硬度(C标尺)测量结果的不确定度分量。将测量不确定度分量进行归类,并最终在置信度95%的情况下,计算出洛氏硬度(C标尺)的扩展不确定度是0.612 HRC,然后根据标准不确定度占比图,找出了影响洛氏硬度(C标尺)实验测量不确定度的最大分量来自于硬度计偏差,并建议除严格按照实验规范进行实验外,还需定期对硬度计进行校验。最终实验表明,鱼骨图分析法可便于快速确定、分类和理解洛氏硬度测量不确定度的相关分量,并根据主次原因,找出影响实验结果的主要来源,制定解决问题的措施,提高测量质量。
On account of during Rockwell hardness experiment,there are many uncertain components and factors affecting the quality of measurement.Therefore,fishbone diagram analysis method is used to determine the uncertain components of Rockwell hardness(C gauge)measurement results from five aspects:human,machine,material,method and environment.The measurement uncertainty components are classified and the extended uncertainty of Rockwell hardness(C gauge)is calculated to be 0.612 HRC with 95%confidence.Then,according to the standard uncertainty proportion chart,the maximum component affecting the measurement uncertainty of Rockwell hardness(C gauge)is found to come from the deviation of hardness tester.It is suggested that the hardness tester should be checked regularly besides strictly following the experimental specifications.Fishbone diagram analysis method can be used to quickly determine,classify and understand the relevant components of Rockwell hardness measurement uncertainty.According to the primary and secondary reasons,the main sources affecting the experimental results are found out,and the measures to solve the problems are formulated to improve the measurement quality.
作者
吴颖
周宏林
黄新
周江
WU Ying;ZHOU Honglin;HUANG Xin;ZHOU Jiang(Laboratory and Practice Management Center,Wenzheng College of Suzhou University,Suzhou 215104,China;College of Mechanical and Electrical Engineering,Suzhou University,Suzhou 215006,China)
出处
《机械工程师》
2019年第12期7-9,共3页
Mechanical Engineer
基金
产学合作协同育人项目(201802355031)
关键词
洛氏硬度
不确定度
鱼骨图
人、机、物、法、环
Rockwell hardness
uncertainty
fishbone diagram
human
machine
object
method
environment
