NC Tool Path Correction for Wear and Deflection Compensation
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Solution Overview
Problem
Conventional NC machine tools require rewriting of the NC program every time the tool is changed, worn, or deflected, leading to increased complexity and errors due to contour errors caused by tool deflection and wear.
Innovation Solution
Incorporating an arithmetic expression into the NC program to calculate and correct the tool's position based on contour errors, wear, and deflection, allowing for continuous processing without re-creating the program.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the NC program uses specific numbers for tool position, then the program configuration is simple, but the program must be rewritten each time the tool is changed, worn or deflected
Solution Approach 1:
The patent changes the parameter representation from fixed specific numbers to variable expressions that incorporate tool contour error data. The NC program uses parameters like tool contour error values and cutting transfer distances that can be dynamically updated without rewriting the entire program, thus maintaining simplicity while improving adaptability
Solution Approach 2:
The patent introduces dynamic correction mechanisms where the NC program automatically adjusts tool position based on real-time tool contour error measurements and cutting distance calculations. This dynamic approach allows the program to adapt to tool wear and deflection without manual rewriting, resolving the contradiction between simplicity and adaptability
2Manufacturing precision
If the NC program is rewritten each time the tool is changed, worn or deflected, then the processing accuracy is maintained, but the work and errors in rewriting increase
Solution Approach 1:
The system implements self-service correction where the NC program automatically calculates and applies tool position corrections based on measured contour errors and cutting distances. The program self-updates without external intervention, maintaining processing accuracy while eliminating the complexity and errors associated with manual rewriting
Solution Approach 2:
The patent incorporates feedback mechanisms where tool contour error measurements and cutting distance data are fed back into the NC program to automatically adjust tool position corrections. This closed-loop feedback system maintains high processing accuracy without requiring manual program rewriting, thus reducing complexity
Data Source
AI summary
A processing apparatus for processing a workpiece includes a tool holding part 9 for holding a tool 3 for processing a workpiece 5, a transferring part 11 for transferring the tool 3 for processing the workpiece 5 with the tool 3, and a control unit 13 for controlling the transferring part 11 so as to transfer the tool 3 with respect to the workpiece 5 on the basis of an NC program, and in the NC program, an arithmetic expression for calculating the position of the tool 3 is incorporated and the program is corrected on the basis of the relationship between the cutting transferring distance, the wear amount, and the deflection amount in addition to the contour error of the tool 3.