Production system including robot having function for correcting position

Patent metadata

Field	Value
Publication number	US-2016349741-A1
Application number	US-201615140483-A
Country	US
Kind code	A1
Filing date	Apr 28, 2016
Priority date	May 29, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A production system in which a position of a robot relative to a machine tool can be measured and an operation position of the robot can be corrected based on the measurement result, by using a simple configuration. The robot has a vision device attached to a movable part such as a robot arm. The machine tool has a visual target arranged on an outer surface of the machine tool.
An image of the visual target captured by a camera is processed by a robot controller or an image processor. Due to such image processing, the position of the robot relative to the machine tool can be measured. Further, the production system has a correcting part which corrects a position of a motion of the robot regarding supplying and ejecting a workpiece, based on the positional relationship between the robot and the machine tool.

First claim

1 . A production system including a machine tool and a robot which supplies or ejects a workpiece to or from the machine tool, the production system comprising:
a visual target arranged on an outer surface of the machine tool; a vision device arranged on a movable part of the robot, the vision device being configured to measure a positional relationship between the robot and the machine tool by capturing the visual target; and a correcting part which corrects a position of a motion of the robot when the robot supplies of ejects the workpiece to or from the machine tool, based on the positional relationship between the robot and the machine tool measured by the vision device.

2 . The production system as set forth in claim 1 , wherein the production system comprises a scheduling part which starts the measurement of the vision device at the same timing as beginning of processing in the machine tool or at a previously designated timing between the beginning of processing and termination of processing.

3 . The production system as set forth in claim 1 , wherein the visual target is constituted by a plurality of markers.

4 . The production system as set forth in claim 1 , wherein at least one of the machine tool and the robot is fixed to a floor by using an outrigger.

Assignees

• Fanuc Corp

Inventors

• Takahashi Hiromitsu
• Nishi Hiroji

Classifications

• G05B2219/40113

  Task planning · CPC title

• G05B19/41865

  characterised by job scheduling, process planning, material flow · CPC title

• G05B2219/50362

  Load unload with robot · CPC title

• G05B19/41825 Primary

  machine tools and manipulators only, machining centre · CPC title

• B23Q7/04 Primary

  by means of grippers {(B23Q7/1494 takes precedence)} · CPC title