数控铣齿机定位误差的热影响分析及其分段建模  

Thermal Impact Analysis of NC Gear Milling Machine Positioning Error and Its Segment Modeling

作　　者：李兴达[1] 李自汉[1] 杨建国[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《机械设计与制造》2015年第5期92-95,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51275305);2013年度上海市产学研项目(沪CXY-2013-29);2013年度上海市引进技术的吸收与创新技术项目(13XI-07);国家科技重大专项课题(2011ZX04015-31)

摘　　要：为了提高YKHS2210A型数控铣齿机的定位精度,根据最小二乘法分段直线拟合原理提出了对热误差斜率分段建模的补偿模型。该数控铣齿机丝杠的固定方式是一段固定一段自由,通过仿真发现丝杠固定端和自由端的温度场差异非常大,因此利用最小二乘法分段直线原理将定位误差的热动态部分分成两段进行拟合,建立了高精度、高可靠性的误差补偿模型。最后在数控铣齿机上进行补偿试验验证,实验结果显示经补偿,在温度变化过程中,机床定位误差一直能减少在53%以上。In order to improve the position accuracy of YKHS2210 A NC gear milling machine,a new compensation model is proposed,using the piecewise linear least squares fitting method on its thermal part. One end of its screw is fixed and the other end is free,so the temperature field of both ends shows very different through the simulation. A precise and robust position error model is created by using the piecewise linear least squares fitting method to separate its thermal part into two.To verify the effect of the model,an experiment is carried out on a NC gear milling machining and the compensation result is very good： its position error is reduced by 53% when the temperature is changing.

关 键 词：数控铣齿机 最小二乘法分段直线拟合 温度场 定位误差建模 

分 类 号：TH16[机械工程—机械制造及自动化] TH161