摘要
小模数齿轮齿槽间隙小,接触式测量难度高,且易损坏测头,本文主要研究基于视觉的未知参数小模数齿轮的齿距偏差和齿廓偏差测量。基于亚像素数字图像处理技术定位齿轮测量基准,即齿轮几何中心,并测量得到齿数、模数、齿顶圆直径和齿根圆直径;依据齿轮精度标准ISO1328-1:2013中偏差项目定义,给出了基于视觉测量的齿轮齿距偏差和齿廓偏差评定方法,开发了小模数齿轮视觉测量数据处理软件。对模数为0.5 mm的渐开线圆柱直齿轮进行了齿距和齿廓偏差视觉测量试验,并与齿轮测量中心的测量结果对比,左右齿面测量结果的绝对误差最大为4μm,最小为1μm,评定齿轮精度等级均为8级。本文给出的未知参数小模数齿轮视觉测量系统和偏差评定方法可在一定范围内用于小模数齿轮测量。
Using contact measurements for small modulus gears is difficult owing to the limited tooth spac⁃es.This work focuses on the vision measurement of small modulus gears with unknown parameters.Based on the sub-pixel technique used in digital image processing,the gear measurement datum,which is the geometric center of the gear,is located.Thereafter,the tooth number,modulus,diameter of the tooth addendum circle,and diameter of the tooth dedendum circle are calculated.According to the defini⁃tion of gear accuracy in ISO 1328-1:2013,this study introduces an evaluation method and a measurement process for gear pitch deviations and profile deviations based on visual measurements,and an evaluation software is developed.A visual measurement test on the pitch and profile deviations of involute cylindrical spur gears with a modulus of 0.5 mm was carried out,and the results were compared with those from a gear measurement center.The comparison indicated that the absolute error in the left and right tooth sur⁃face measurements had a maximum value of 4μm and a minimum value of 1μm;the gear accuracy for both cases was judged to be grade 8.This vision measurement system can be used for small modulus gears within a certain range.
作者
汤洁
刘小兵
李睿
TANG Jie;LIU Xiao-bing;LI Rui(Beijing Engineering Research Center of Precision Measurement Technology and Instruments,Beijing University of Technology,Beijing 100124,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2021年第1期100-109,共10页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.51635001)。
关键词
视觉测量
系统标定
齿距偏差
齿廓偏差
齿轮参数测量
vision measurement
system calibration
pitch deviations
profile deviations
gear parame⁃ters measurement
