磨齿机分度误差传递规律  

Indexing error transfer law of a gear grinding machine

作　　者：凌四营[1] 李军[2] 于佃清 贾颖[2] 王立鼎[1,2] 娄志峰[1] 

机构地区：[1]大连理工大学精密特种加工及微系统教育部重点实验室,辽宁大连116023 [2]大连理工大学微纳米技术及系统辽宁省重点实验室,辽宁大连116023 [3]辽宁省计量科学研究院,辽宁沈阳110004

出　　处：《光学精密工程》2016年第8期1934-1939,共6页Optics and Precision Engineering

基　　金：国家自然科学基金青年基金资助项目(No.51305059);国家自然科学基金重点资助项目(No.U1508211);国家自然科学基金创新研究群体资助项目(No.51321004);国家科技支撑计划资助项目(No.2014BAF08B)

摘　　要：为预测被加工齿轮的齿距加工精度,研究了Y7125型大平面砂轮磨齿机系统分度误差的传递规律。采用全闭环测量法对用作角度测量基准的正36面棱体进行了高精度标定;基于该正36面棱体和相对测量法在机提取机床36个等分点系统分度误差曲线;最后在磨齿机上进行精密磨齿实验,通过比较齿轮试件的齿距累积偏差与机床原始系统分度误差的差异,研究机床分度误差的传递规律,并通过实验得到磨齿机分度误差传递过程中的不确定度。实验结果表明:采用全闭环测量法标定正36面棱体的测量不确定度达到±0.05;磨齿机系统分度误差传递到被加工齿轮后,齿距累积总偏差由2.1m增大到2.6m,相对误差增加了24%;通过磨齿实验得到磨齿机分度误差传递过程中的不确定度为±0.6m。得到的机床分度误差传递规律可用于预测齿轮的齿距累积加工精度,为制定科学的磨齿工艺提供技术支持。To predict the pitch machining accuracy of a gear to he ground, the transfer law of the sys- tematic indexing error of the gear-grinding machine （Y7125） with flat-faced grinding wheel was re- searched. The normal 36 prism for angle measurement datum was calibrated in high-precision by using the full closure measurement method, then the systematic indexing error curve with 36 equal points was extracted on-machine based on the normal 36 prism and the relative measurement method. Final- ly, the precision gear-grinding experiment was error transfer law of the machine was studied conducted on the gear-grinding machine. The indexing by comparing the difference between the cumulativepitch deviation of a gear specimen and the original systematic indexing error of the gear grinding ma- chine, and the uncertainty during the error transfer process of the gear-grinding machine was obtained by experiments. Experimental results show that the measurement uncertainty of the full closure meas- urement method to calibrate the normal 36 prism reaches to 0.05＂. The total cumulative pitch deviation varies from 2.1 μm to 2.6 μm and the relative error increases by 24% after the systematic indexing er- ror of the gear grinding machine transfers to the gear to be ground. Moreover, the uncertainty during the error transfer process is ±0. 6 μm. The transfer law of systematic indexing error of the gear- grinding machine from the experiments mentioned above can be used to predict the pitch machining ac- curacy of the gear to be ground and can provide technical supports for the development of the scientific gear-grinding process.

关 键 词：磨齿机 分度误差 齿距累积偏差 误差传递规律 全闭环测量法 

分 类 号：TG86[金属学及工艺—公差测量技术] TG616