Precision Machining by Local Machining Station Method

局部加工站法精密加工

• 批准号: 07650155
• 负责人: FURUTANI Katsushi
• 金额: $ 1.79万
• 依托单位: Toyota Technological Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650155/
• 关键词: precision machining; end effector; electrical discharge machining; robot; positioning; parallel mechanism; パラレルメカニズム

In this study, Local Machining Station (LMS) method is proposed for automatic machining systems with industrial robots. This method aims to improve the positioning accuracy for a local area of a large workpiece and the stiffness of the robot machining system. The LMS consists of a reference plate with displacement senosors, several legs and a movable small machine tool. The length of the legs is variable. The lags and the machine tool are fixed on the reference plate. The LMS is mounted on a robot arm as an end-effector. When the LMS is clamped onto a large workpiece with its legs, the stiffness of the robot machining system increases. Since the position of the movable machine tool is measured with the displacement sensors on the reference plate, the positioning accuracy for a local area of the large workpiece becomes higher. A prototype of LMS is manufactured in trial. A pencil-size electrical discharge machine is installed on the reference plate as the movable machine tool. The prototype is positioned by the PI control. The length of the legs is measured with potentiometers. The positioning accuracy of the prototype is several tens micrometer order. A coordinate system is settled by using holes on a workpiece and some other holes are machined on the coordinate system. The accuracy of machined holes by the LMS method is better than that with a robot.

在这项研究中，本地加工站（LMS）的方法，提出了自动加工系统与工业机器人。该方法旨在提高大型工件局部区域的定位精度和机器人加工系统的刚度。LMS由一个带位移传感器的基准板、几个支腿和一个可移动的小型机床组成。腿的长度是可变的。样板和机床固定在基准板上。LMS安装在机器人手臂上作为末端执行器。当LMS用其腿夹持在大型工件上时，机器人加工系统的刚度增加。由于利用基准板上的位移传感器测量可动机床的位置，因此大型工件的局部区域的定位精度变得更高。并试制了一台LMS样机。在基准板上安装一台小型电火花加工机作为可动机床。样机的定位采用PI控制。腿的长度用电位计测量。样机的定位精度达到几十微米量级。利用工件上的孔建立坐标系，并在此坐标系上加工其它孔。用LMS方法加工孔的精度优于用机器人加工孔的精度。

项目成果

毛利尚武ほか: "多面体校正法による機上形状計測(第1報)-放電加工機への適用-" 精密工学会誌. 61. 849-853 (1995)

Naotake Mori 等人：“使用多面体校准方法进行机上形状测量（第 1 次报告）- 在放电加工机中的应用 -”日本精密工程学会杂志 61. 849-853 (1995)。

N.Mohri et al.: "On-the-mechine Measurement by a Calibration System with Polyhedra (1st Report) -Application to Electrical Discharge Machine-" Journal of the Japan Society for Precision Engineering. Vol.61, No.6. 849-853 (1995)

N.Mohri 等人：“多面体校准系统的机上测量（第 1 次报告）-放电加工机的应用-”日本精密工程学会杂志。