微细铣刀螺旋沟槽包络计算与微量补偿刃磨研究

发布时间：2018-12-27 16:03

【摘要】：微细刀具的制造方法是保证微细铣刀制造精度的技术关键。从砂轮与工件的相对运动关系出发,依据砂轮与工件的啮合条件,分析砂轮表面法矢量在母线交点处的变化情况,建立砂轮与螺旋沟槽完整公共接触线方程,由接触线围绕工件轴线回转形成回转面的轴向截形,推导出铣刀轴向截形的廓形方程,同时根据廓形方程仿真出沟槽截形,据此分析了安装参数对截形的误差敏感度。在刃磨微细铣刀螺旋沟槽过程时,提出采用Z轴插补对挠曲进行补偿的方法,通过计算刃磨过程的挠曲变形量,相应地在工件的轴向位置补偿变形量。实验表明,补偿后实得微细铣刀的前角和芯厚与仿真的铣刀螺旋槽几何参数吻合良好。
[Abstract]:The manufacturing method of micro cutting tools is the key to ensure the manufacturing accuracy of micro milling cutters. Based on the relative motion relationship between the grinding wheel and the workpiece, according to the meshing condition between the grinding wheel and the workpiece, the change of the normal vector on the surface of the grinding wheel at the intersection of the busbar is analyzed, and the complete common contact line equation between the grinding wheel and the spiral groove is established. The axial section of the rotary surface is formed by rotating the contact line around the axis of the workpiece, and the profile equation of the axial section of the milling cutter is derived. According to the profile equation, the groove section is simulated, and the error sensitivity of the installation parameters to the section is analyzed. In the process of grinding the spiral grooves of micro-milling cutters, a method of compensating the deflection by Z-axis interpolation is put forward. The deflection of the workpiece is compensated by calculating the flexural deformation of the grinding process and compensating the deformation in the axial position of the workpiece accordingly. The experimental results show that the pre-angle and core thickness of the compensated micro-milling cutter are in good agreement with the geometric parameters of the spiral groove of the simulated milling cutter.
【作者单位】：北京理工大学先进加工技术国防重点学科实验室;北京精密机电控制设备研究所;
【基金】：国家自然科学基金资助项目(51375055)
【分类号】：V261

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