复杂深孔内轮廓数控加工误差在位修正技术

On site correction technology for computer numerical control machining error of complex deep hole inner contour

提出了复杂深孔内轮廓数控加工误差在位修正技术,基于PID控制器构建了复杂深孔内轮廓数控机床运动学模型。采用正解模型和逆解模型,分别计算刀心位置轮廓误差和刀轴方向轮廓误差。采用复杂深孔内轮廓数控机床在位修正技术对输出的实际刀轴、刀心运动方位和进给轴运动方位进行比较。实验结果表明:应用该技术计算复杂深孔内轮廓数控机床轴刀尖位置较为精准,计算的数控加工误差数值与实际误差数值极为吻合,可减少加工误差,应用效果较佳,有效提升了复杂深孔零件的加工精度。

It proposes the in-place correction technique of internal profile NC machining error for the complex deep hole.Based on a PID,a kinematic model of a complex deep hole internal contour CNC machine tool is constructed.The forward solution model and inverse solution model are used to calculate the contour error of the tool center position and the contour error of the tool axis direction,respectively.The actual tool axis,tool center motion direction,and feed axis motion direction of the output are compared using the in-place correction technology of the complex deep hole internal contour CNC machine tool,The experimental results show that the application of this technology can calculate the position of the tool tip of the complex deep hole internal contour CNC machine tool shaft is relatively accurate,and the calculated CNC machining error value is very consistent with the actual error value,which can reduce machining errors and have a good application effect,effectively improving the machining accuracy of complex deep hole parts.