上海交通大学学报

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (06): 915-919.

• 金属学与金属工艺 • 上一篇    下一篇

基于可编程多轴控制器的电火花铣削伺服轨迹生成及控制方法

 黄河, 白基成, 卢泽生   

  1. (哈尔滨工业大学 机械制造及自动化系， 哈尔滨 150001)
  • 收稿日期:2010-07-13 出版日期:2011-06-29 发布日期:2011-06-29
  • 基金资助:

    国家高技术研究发展计划（863）项目（2007AA04Z345），国家自然科学基金资助项目（50875064）

Generation and Control Method of EDM Mill Servo Track Based on Programmable Multi-axis Controller

 HUANG  He, BAI  Ji-Cheng, LU  Ze-Sheng   

  1. (Department of Mechanical Machining and Automation, Harbin Institute of Technology, Harbin 150001, China)
  • Received:2010-07-13 Online:2011-06-29 Published:2011-06-29

摘要：   针对电火花铣削（EDM）加工过程中，要求控制系统具有能够根据加工间隙状态实时调整轨迹运动速度的功能以及特有的短路时按照原轨迹快速回退的功能，基于PC上位机和可编程多轴控制器（PMAC）构建了EDM数控系统，并按照实时性要求分配任务的执行. 提出使用正、反向2个运动程序结合后台PLC （Programmable Logic Controller）程序进行加工的方法，实现了加工过程中高效、精确的短路回退运动.利用PMAC时基功能，使工具电极的运动速度随加工间隙状态的变化而调整.轨迹运动方向和运动速度的改变完全由PMAC完成，减轻了上位PC机的运算负担，提高了加工的实时性.给出了三维型腔的加工实例.

关键词: 电火花铣削, 伺服控制, 时基功能, 可编程多轴控制器

Abstract:  An NC system based on PC and PMAC (Programmable Multi-Axis Controller) was constructed for EDM mill to meet the need of adjusting velocity and direction of movement relying on gap statement in the process. According to real-time requirements, system tasks were assigned to PC and PMAC. This improved system real-time feature and reliability. A couple of motion NC programs for same track with different directions were generated combined with PLC program to realize the backward movement of EDM mill. According to machine gap status, the time based function of PMAC was used to control electrode motion velocity. The direction and velocity of track movement were totally controlled by PMAC. This reduces   computing burden of the host PC and improves the real time feature of the processing. 3D cavities were machined to prove the effectiveness of the methods developed in this paper.

Key words: electrical discharge milling(EDM), servo control, time based function, programmable multi-axis controller(PMAC)

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