Cell controller for finding cause of abnormality in manufacturing machine

Abstract

A cell controller includes an inside information acquiring unit for acquiring the inside information of the plurality of manufacturing machines, and an inside information comparing unit which compares, with regard to a first manufacturing machine and a second manufacturing machine, which are selected by the comparison object selecting unit, first inside information and second inside information, which are acquired, and the inside information comparing unit extracting a difference therebetween. The cell controller also includes an abnormality cause finding unit for finding a cause of an abnormality that occurs in the first manufacturing machine or the second manufacturing machine, based on the difference, and an abnormality cause conveying unit for conveying the cause of the abnormality to the outside of the cell controller.

Description

technical field [0001] The present invention relates to a unit control device that controls a plurality of manufacturing machines that construct a manufacturing unit. Background technique [0002] In manufacturing plants, machining of parts, welding, etc. are performed by manufacturing machines such as machine tools and robots. In addition, in order to manufacture products, a production line, such as a manufacturing cell, is constructed with a plurality of manufacturing machines. In this case, each manufacturing machine constituting the manufacturing cell is controlled by the cell control device via network communication. In addition, the unit control device drives each manufacturing machine in accordance with an instruction from a production management device that is a host computer. [0003] In such a manufacturing cell, an abnormality may occur in a manufacturing machine such as a robot, and the manufacturing machine may not operate normally, resulting in a decrease in ...

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Problems solved by technology

[0010] In addition, the device disclosed in Japanese Patent Application Laid-Open No. 2004-202624 has a problem in that, although component failures of manufacturing machines such as robots are predicted, it is impossible to predict failures caused by setting errors and operating errors of the manufacturing machines, that is, internal information of the manufacturing machines. caused the exception to occur

In the device disclosed in Japanese Patent No. 4739556, there is also the following problem: when the simulation part reproduces the actual motion and state of the robot for the motion command, if there is a simulation error, the abnormality judgment result will no longer be correct.

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