This paper describes a new method and device for measuring helical line, pitch diameter, taper and half-angle of thread of petroleum thread gauges.
本文介绍一种测量石油螺纹量规的螺旋线、中径、锥度和牙形半角的新方法及装置。
2
The method of stress analysis for pipe with special joints including Y joint and taper - taper joint is indicated through the analysis of vacuum transfer line.
A simplified method based on fuzzy weight function is proposed in this paper. 3d taper beam is replaced with line beam in the new method, which can avoid sawtooth phenomenon.