发明申请
US20110180516A1 POSITION DETECTION DEVICE AND A POSITION DETECTION METHOD FOR A WORKPIECE TO BE WELDED
审中-公开
位置检测装置和待焊接工件的位置检测方法
- 专利标题: POSITION DETECTION DEVICE AND A POSITION DETECTION METHOD FOR A WORKPIECE TO BE WELDED
- 专利标题(中): 位置检测装置和待焊接工件的位置检测方法
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申请号: US12978812申请日: 2010-12-27
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公开(公告)号: US20110180516A1公开(公告)日: 2011-07-28
- 发明人: Hiromitsu TAKAHASHI , Toshimichi Aoki , Masanobu Hatada , Akinori Nishimura
- 申请人: Hiromitsu TAKAHASHI , Toshimichi Aoki , Masanobu Hatada , Akinori Nishimura
- 申请人地址: JP Minamitsuru-gun
- 专利权人: FANUC LTD
- 当前专利权人: FANUC LTD
- 当前专利权人地址: JP Minamitsuru-gun
- 优先权: JP2010-017202 20100128
- 主分类号: B23K11/11
- IPC分类号: B23K11/11
摘要:
A position detection device for a workpiece to be welded including a spot welding gun having a pair of electrodes adapted to be disposed opposite each other across the workpiece; a robot for holding either one of the spot welding gun and the workpiece in a manner movable relate to each other; a servo motor for allowing the pair of electrodes to approach the workpiece and separate from the workpiece; a physical quantity detection section for detecting a physical quantity correlative to a torque of the servo motor when the servo motor allows one of the pair of electrodes to approach a surface of the workpiece so that the one of the pair of electrodes abuts against the surface of the workpiece; a position detection section for detecting positions of the pair of electrodes; a storage section for storing the physical quantity detected by the physical quantity detection section and a value detected by the position detection section; and a computation section for calculating a contact start time at which the one of the pair of electrodes comes into contact with the surface of the workpiece based on time-series data of the physical quantity stored in the storage section, and computing a position of the workpiece at the contact start time based on the value detected by the position detection section stored in the storage section.