摘要
研究滚齿机热变形对滚齿切削点位置偏差及齿向偏差的影响,是提高滚齿切削精度的重要方法之一。在金属材料热膨胀原理、构件轴线可伸长理论及温度分布不均匀梁的Euler-Bernoulli和Kirchhoff平截面假定理论基础上,提出了针对双柱立式数控滚齿机的床身与立柱弯曲热变形的一种计算新模型,并提出了基于变形微元与隔离体法的滚齿机立柱轴向变形与弯曲变形的耦合理论。经比较本文提出的热变形理论及实验测试数据,两者相对误差低于5%,表明该方法对双柱立式数控滚齿机结构优化、切削点位置偏移量预测及补偿具有指导意义。
Based on the theory of thermal expansion deformation of metallic materials,extensional beam theory,non-uniform temperature distribution of the Euler-Bernoulli beam and Kirchhoff theory of plane-section assumption,a novel model was proposed to calculate the bending thermal deformation of lathe bed and upright column of double-column vertical NC gear hobbing machine.The research on the axial deformation and bending deformation of the upright column were also carried out by utilizing the deformation theory of the deformation element and equilibrium element Method.Compared the calculation results with the practical experimental values of the thermal deformation of the machine tool,it was shown that the relative error of the results was lower than 5%.The above analysis indicated the effectiveness and validity of the research method,which has great reference value and instructive significance for optimum structural design,cutting point position error prediction and compensation on double-column vertical NC gear hobbing machine.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2011年第3期225-232,共8页
Journal of Sichuan University (Engineering Science Edition)
基金
国家科技重大专项资助项目(2009ZX04001-081)
国家杰出青年科学基金资助项目(50925518)
重庆市2011年科技攻关重点计划资助项目
关键词
双立柱
数控滚齿机
热变形
温度梯度
切削点
齿向偏差
double upright column
NC gear hobbing machine
thermal deformation
temperature gradient
cutting point
tooth trace deviation
