Automatic parameter adjustment device for adjusting parameter corresponding to processing condition

Patent metadata

Field	Value
Publication number	US-2016202688-A1
Application number	US-201614993254-A
Country	US
Kind code	A1
Filing date	Jan 12, 2016
Priority date	Jan 13, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

An automatic parameter adjustment device capable of quantitatively determine the degree of importance of a processing time and a processing accuracy, and effectively adjusting a parameter in accordance with a processing condition. The adjustment device includes: a parameter changing part which changes a control parameter; a test program executing part which transmits a test program to a numerical controller for executing the test program; an execution result obtaining part which obtains an execution result of the test program; a storing part which stores the execution result and the parameter corresponding thereto; a weighting part which determines weighting coefficients of the processing time and processing accuracy as evaluation criteria based on input or setting by an operator; and a parameter extracting part which evaluates the execution result based on the weighted evaluation criteria, and extracts an optimum parameter from the storing part based on the evaluated execution result.

First claim

1 . An automatic parameter adjustment device for automatically adjusting a control parameter of each of at least one drive axis of a machine tool, the control parameter being set to a numerical controller for controlling the machine tool, the automatic parameter adjustment device comprising:
a weighting part which determines weighting coefficients of a processing time and a processing accuracy of the machine tool, as evaluation criteria for automatically adjusting the control parameter; a parameter changing part which changes the control parameter; a test program executing part which transmits a test program used in automatically adjusting the control parameter to the numerical controller for executing the test program by the numerical controller; an execution result obtaining part which obtains an execution result by executing the test program, the execution result including a commanded trajectory and an actual trajectory of a representative point of the machine tool and an execution time of the test program; a storing part which stores the execution result and a control parameter corresponding to the execution result; and a parameter extracting part which evaluates the execution result based on the two weighted evaluation criteria, and extracts an optimum control parameter based on the evaluated execution result, wherein the test program is executed multiple times while changing the control parameter, and the extracted control parameter corresponds to an execution result having a high evaluation among a plurality of execution results obtained by executing the test program multiple times.

2 . The automatic parameter adjustment device as set forth in claim 1 , wherein the parameter extracting part evaluates the execution result of the test program, based on an evaluation value calculated by: normalizing the execution time of the test program and normalizing an integration value of an absolute value of a trajectory error corresponding to a difference between the commanded trajectory and the actual trajectory; and adding a product of the normalized execution time and the weighting coefficient of the processing time determined by the weighting part to a product of the normalized integration value and the weighting coefficient of the processing accuracy determined by the weighting part.

3 . The automatic parameter adjustment device as set forth in claim 1 , wherein the execution result obtaining part obtains the execution result of a specified portion of the test program.

4 . The automatic parameter adjustment device as set forth in claim 1 , wherein the storing part has a function for generating or outputting a report including detailed information regarding the automatic adjustment of the control parameter.

Assignees

• Fanuc Corp

Inventors

• Ogawa Hajime
• Tezuka Junichi

Classifications

• G05B2219/32053

  Adjust work parameter as function of other cell · CPC title

• G05B19/404 Primary

  characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia (G05B19/19, G05B19/41 take precedence) · CPC title

• G05B2219/49065

  Execute learning mode first for determining adaptive control parameters · CPC title

• G05B2219/49067

  Find optimum between production rate and quality, number of points and speed · CPC title

• G05B2219/42128

  Servo characteristics, drive parameters, during test move · CPC title