Curved Tool Path Modification for High-Precision CNC Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing machining technologies face challenges in achieving high accuracy with low computational load, particularly when machining complex shapes, as inserting numerous command points to improve accuracy increases processing demands on numerical control devices.
Innovation Solution
A tool path modification device and method that acquires, adjusts, and curvilinearizes tool path information by modifying command points and extracting curvilinearization sections, replacing linear information with curve data to reduce computational load while maintaining high machining precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a large number of command points are inserted to improve machining accuracy, then manufacturing precision is improved, but computational load increases
Solution Approach 1:
The patent applies curvilinearization to replace linear command point sequences with curved path representations. By fitting curves (such as circular arcs or splines) through selected command points, the system maintains high machining accuracy along curved tool paths without requiring dense command point insertion, thereby reducing computational load while preserving manufacturing precision.
Solution Approach 2:
The tool path is segmented into multiple curvilinearization sections, each processed independently. This allows the system to apply curve fitting selectively to sections where high accuracy is needed, rather than uniformly processing the entire path, optimizing the balance between precision and computational efficiency.
2Manufacturing precision
If command points are densely distributed to reduce depth of cut error, then manufacturing precision is improved, but processing time increases
Solution Approach 1:
By representing tool paths as continuous curves rather than discrete linear segments between command points, the system achieves smooth depth of cut transitions without requiring excessive command points. The curve representations inherently provide continuous position and orientation information, reducing processing time while maintaining depth of cut accuracy.
Solution Approach 2:
The patent transforms the tool path representation from discrete coordinate points to continuous curve parameters. This parameter change allows the system to describe complex curved paths with fewer parameters, reducing processing time while maintaining the precision needed for accurate depth of cut control.
Data Source
AI summary
A tool path modification device according to an embodiment of the present disclosure, which enables high precision machining with a small computational load, is provided with: a tool path acquisition unit that acquires tool path information that specifies a tool path along which a tool for machining a workpiece travels using the coordinates of a plurality of command points through which the tool should pass; a command point adjustment unit that modifies the tool path information by changing the coordinates of the command points or adding or removing the command points; a curvilinearization section extraction unit that extracts, from the tool path information modified by the command point adjustment unit, a curvilinearization section for curvilinearizing the tool path; a tool path curvilinearization unit that replaces the information of the curvilinearization section in the tool path information modified by the command point adjustment unit with curve information; and a tool path output unit that outputs the tool path information after the tool path curvilinearization unit has replaced the information of the curvilinearization section.