Development of CAM system for automatic compound dressing of superabrasive grinding wheels
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摘要: 在超硬磨料砂轮修整领域,多工艺复合修整有明显优势,但是目前暂无砂轮复合修整自动化系统相关研究,为了使复合修整方法中多种工艺更系统的整合,提高成形砂轮的修整效率,本文结合自主研制的激光-机械复合修整装备,开发了一套CAM系统,该系统可根据不同砂轮截面形状,自动规划多工艺、多修整策略下的修整轨迹,计算平面三轴联动修整刀路,自动生成加工代码,同时设计了可视化界面仿真加工过程。对金刚石青铜结合剂砂轮进行修整试验,结果表明:该系统可以在保证机床不发生碰撞和过切的情况下,生成激光粗修、半精修,机械精修的加工程序,大幅提高复合修整方法的编程效率,修整后的砂轮轮廓误差在9.1 µm以内,圆跳动误差6.1 µm。
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关键词:
- 计算机辅助制造 /
- 轨迹规划 /
- 成形砂轮 /
- 激光-机械自动化复合修整
Abstract: In the field of superabrasive wheel dressing, multi-process composite dressing has obvious advantages, but there is no research related to the automation system of grinding wheel composite dressing. In order to make the integration of multiple processes in the composite dressing method more systematic and improve the dressing efficiency of shaped grinding wheels, this paper develops a CAM system by self-developed laser-mechanical composite dressing equipment, which can, according to different grinding wheel section shapes, automatically plan the dressing trajectory under multiple processes and dressing strategies, calculate the dressing toolpath with planar three-axis linkage, automatically generate the machining code, and at the same time design a visualisation interface to simulate the machining process. The results of dressing experiments on 150# diamond bronze bonded grinding wheels show that the system can generate machining programs for laser roughing, semi-finishing and mechanical finishing without collision and overcutting of the machine tool, and significantly improve the programming efficiency of the compound dressing method. And the dressing wheel profile error is within 9.1 µm and circular runout error is 6.1 µm.
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