摘要
根据凸轮轴X-C轴联动恒线速度磨削加工数学模型,建立了砂轮架进给位移与速度、凸轮工件主轴转速的理论方程。根据数控凸轮轴磨床加工能力的约束条件,对砂轮架进给中速度、加速度或加加速度值超出限定值的凸轮转角区间,通过积分反求方法求解出相应转角区间工件主轴所允许的转速值,并以该段转速值替换对应的转角区间上凸轮轴恒线速度磨削时理论转速值。对优化计算前后的工件主轴转速曲线进行了凸轮轴磨削加工实验。实验结果表明:采用优化后的凸轮工件主轴转速进行加工,相比于恒线速度理论转速加工,其升程最大误差与最大相邻误差减小,工件表面粗糙度降低,提高了凸轮轴高效精密磨削加工质量。
According to the constant speed camshaft grinding mathematical model in X-C axis,the equations of horizontal feed displacement and velocity of wheelhead,cam workpiece spindle theory speed were established.Based on the machine capacity constraints of CNC camshaft grinder,the allowed values of workpiece spindle speed were calculated with integration reverse method,where the values of horizontal feed velocity,acceleration or jerk of wheelhead exceeded the limit in the corresponding corner section.Then the calculated values of workpiece spindle speed were replaced with the theoretical speed value of constant speed camshaft grinding on the corresponding corner section.With the workpiece spindle speed curves before and after optimization,the camshaft grinding experiments were carried out.The experimental results indicate that：using the optimized workpiece spindle speed,the maximum cam lifting errors and maximum adjacent errors of the camshaft decrease compared to that processed by the theoretical constant speed;and the surface roughness also decreases.It shows that optimization method can improve the processing quality of the precision and efficient camshaft grinding.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2016年第5期652-657,共6页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51175163)
国家科技支撑计划资助项目(2015BAF23B01)
高等学校博士学科点专项科研基金资助项目(20110161110032)
关键词
凸轮轴
工件主轴
转速优化
砂轮架加速度
积分反求
camshaft
workpiece spindle
speed optimization
wheelhead acceleration
integration reverse
