NPT圆锥外螺纹中径测量的改进方法  

Improved measurement method of pitch diameter of NPT tapered thread

作　　者：程芳[1] 符伟民[1] 王建伟[1] 

机构地区：[1]上海市质量监督检验技术研究院

出　　处：《上海计量测试》2011年第5期17-20,共4页Shanghai Measurement and Testing

摘　　要：利用辅助工具,改进传统的L形垫块与三针的组合式测量方法,解决实际测量中对于小尺寸NPT螺纹塞规的测量死角问题,扩大测量范围,提高测量效率。Generally the pitch diameter is measured. The paper has improved the traditional combined measurement method by assistant tool in order to solve the dead space problem of small size of pitch diameter. This improved method expands measurement range and raise the measurement efficiency.

关 键 词：NPT螺纹塞规 中径测量 L形垫块 万能测长仪 

分 类 号：TG85[金属学及工艺—公差测量技术]