张哲宇　王海滨　张飞虎　王枫辉

摘 要：以成形砂轮为研究对象，采用PROE软件和Protel99se软件设计并研制出两坐标电火花砂轮修整装置，可对任意截面形状的金属基结合剂金刚石成形砂轮整形。修整装置采用回转电极结构修整成形砂轮，采用控制系统驱动两轴联动步进电机带动两坐标工作台完成修整器的砂轮整形运动轨迹。根据电火花修整极性效应试验结果，采用合适的放电参数：电压120 V、电流20 A，脉冲占空比50%，利用两坐标电火花砂轮修整装置修整成形砂轮，以修整后的成形砂轮对氧化铝陶瓷工件进行切入磨削加工试验，设定磨床主轴转速2 800 r/min、磨床工作台进给速度5 m/min、切入磨削深度为4 μm。试验结果表明，工件圆弧槽整体廓形较理想，圆弧槽误差小于5 μm。得出两坐标电火花砂轮修整装置整形后成形砂轮具有一定的整形精度，能够对工件进行磨削加工。

关键词：成形砂轮;电火花修整;两坐标砂轮修整装置;回转电极;整形精度

中图分类号：S225.93   文献标识码：A  文章编号：1006-8023（2019）04-0070-06

Development of Double-coordinate NC Electro-spark

Grinding Wheel Reshaping Device

ZHANG Zheyu1， WANG Haibin1*， ZHANG Feihu2， WANG Fenghui1

（1.College of Engineering and Technology， Northeast Forestry University， Harbin 150040;

2.College of Mechanical and Electrical Engineering， Harbin Institute of Technology， Harbin 150001）

Abstract：Taking formed grinding wheel as research object， a double-coordinate electro-spark reshaping device is designed and developed with ProE and Protel99se， which can be used to reshape metal-based bonded diamond grinding wheel with arbitrary cross-section. The grinding wheel dresser of reshaping device adopts rotating electrode structure to reshape the formed grinding wheel， two-axis linkage stepping motor driven by control system impels double-coordinate worktable to finish the grinding wheel shaping trail of dresser. According to the polarity effect test results of electro-spark reshaping， appropriate discharge parameters are adopted： voltage is 120 V， current is 20 A， pulse duty cycle is 50%. Double-coordinate electro-spark reshaping device is used to dress metal-based bonded diamond grinding wheel. After being dressed， the grinding wheel is used to grind the alumina ceramic workpiece in the cut-in grinding test， setting the spindle speed of the grinder as 2 800 r/min， the feed speed of the grinder table as 5 m/min and the cut-in grinding depth as 4 μm. Test results show that the ideal overall arc groove profile of the workpiece is achieved， the deviation of the arc groove is less than 5 μm. It comes to conclusion that after being dressed by double-coordinate electro-spark reshaping device， the grinding wheel has certain shaping accuracy and it can be used to grind the workpiece.

Keywords：Formed grinding wheel; electro-spark reshaping; double-coordinate grinding wheel reshaping device; rotary electrode; shaping accuracy

0 引言

當今，随着科技进步，在新型高性能、高精度的光学系统中，以氧化铝陶瓷和微晶玻璃等硬脆材料为元件制造的光学器件在林业遥感信息收集、卫星数据监测、森林资源调查，以及高精度、高性能林业遥感成像仪器研制开发中应用广泛。应用非球曲面光学零件，可以获得良好的成像效果，矫正多种像差，改善成像质量，提高图像鉴别能力[1-3]。

对于非球面零件的加工，主要根据零件的材料、精……