模具边界邻域气压砂轮进动光整轨迹优化  

Pneumatic Wheel Precession Finishing Trajectory Optimization in Neighborhood of Mould Boundaries

作　　者：蔡东海[1] 计时鸣[1] 张鹤腾[1] 金明生[1] 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室,杭州310032

出　　处：《中国机械工程》2016年第8期1084-1089,共6页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51175471;51205358);浙江省科技厅创新团队资助项目(2011R50011-07);浙江省科技厅公益性技术应用研究计划资助项目(2015C31060)

摘　　要：针对气压砂轮进动光整在模具边界区域的振动加剧和边界棱线过度磨损等问题,提出在进动光整轨迹规划过程中对气压砂轮与工件相对切削速度方向进行约束的方案,推导出边界约束条件,并编写具有边界约束条件的进动光整轨迹生成程序。优化后的进动光整轨迹在连续曲面/平面内采用常规的进动光整方法,在边界附近采用具有约束的进动光整方法,因此兼具了进动光整方法切削速度方向的无序性优势,又避免了在工件边界附近引起剧烈振动和材料过度去除等问题。应用边界约束条件后的进动光整轨迹相比无约束的进动光整轨迹,在边界附近具有更小的振动和更完好的边界线,对加工过程和加工结果的改善在实际加工中得到了验证。For the vibration intensified and excessive removal of material in finishing the neighbor- hood of mould boundaries by pneumatic wheel precession finishing technology, the direction con- straint of relative cutting speed was applied in precession finishing trajectory planning process and the boundary constraint conditions were derived. Then the precession finishing trajectory generation pro- gram with boundary constraint conditions was compiled. The optimized precession finishing trajectory means used the normal precession to finish the continuous surface and used constraint precession to finish the boundary. It provided with disordered cutting directions and avoided vibration intensified and excessive removal of material. Precession finishing trajectory with boundary constraint conditions had even smaller vibration and more intact boundary line, compared to unconstrained precession fin- ishing trajectory. This boundary constraint conditions improve both of the process and the outcome of pneumatic wheel precession finishing method, and has been verified at the actual processing.

关 键 词：气压砂轮 轨迹规划 边界约束条件 振动 

分 类 号：TH16[机械工程—机械制造及自动化] TP391[自动化与计算机技术—计算机应用技术]