光学精密工程2025，Vol.33Issue(6)：862-873,12.DOI:10.37188/OPE.20253306.0862
基于光谱共焦原理的钻杆接头内螺纹参数测量
A measurement method for the internal thread parameters of drill pipe joints based on spectral confocal principle
摘要
Abstract
To achieve measurement of drill pipe thread parameters in an automated and contactless meth-od,this paper proposed a scanning measurement method for large taper thread profile by a short-range sen-sor based on the spectral confocal measurement principle.This method used the cooperative movement of the spectral confocal sensor and the measured thread to quickly obtain the cross-sectional profile data pass-ing through the thread axis,which characterized the thread surface quality.To correct the measurement er-ror caused by the non-coaxiality of the thread axis and the rotary table axis,a conical thread point laser measurement model was established,a thread tooth profile distortion compensation algorithm was devel-oped,and a two-dimensional laser measurement system for the inner thread parameters of the drill pipe joint was developed and integrated with the automated production line.The measurement system adopted a vertical structure and was mainly composed of a base,a precision five-axis displacement platform,a grat-ing sensor,a control system,a software system,etc.At the same time,a two-dimensional measurement and evaluation software for the inner thread parameters of the drill pipe joint was developed to calculate and evaluate key parameters such as pitch,tooth height,taper,tooth profile angle,and base diameter.Experi-mental results show that the compensation rate of the base diameter by the tooth profile distortion compen-sation algorithm is 45.4%,the compensation rate of the tooth profile half-angle is 45%,the compensation rate of the taper is 26.7%,the compensation rate of the tooth height is 25%,and it has almost no effect on the pitch;the measurement accuracy of the developed measurement system can reach±2 μm,and the measurement cycle is 102 seconds.Compared with the traditional measurement method,this measure-ment system has the characteristics of non-contact measurement,high automation,and high precision,which meets the precision requirements of drill pipe thread measurement.关键词
钻杆螺纹/螺纹测量/轮廓扫描测量/光谱共焦传感器/螺纹参数Key words
drill pipe thread/thread measurement/contour scanning measurement/spectral confocal sen-sor/parameter of thread分类
机械工程引用本文复制引用
陈彦宇,田东庄,居培..基于光谱共焦原理的钻杆接头内螺纹参数测量[J].光学精密工程,2025,33(6):862-873,12.基金项目
陕西省重点研发计划项目(No.2024GX-YBXM-525) （No.2024GX-YBXM-525）
