Curvature-Based Tool Path Compensation for Accurate Surface Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tool path compensation devices fail to accurately machine workpieces with curved surfaces due to the tool veering away or cutting into the target shape between command points, resulting in errors in the final machined surface.
Innovation Solution
A tool path compensation device that includes a tool path acquisition unit, a tool shape acquisition unit, a target shape acquisition unit, and a density adjustment unit, which adjusts the density of command points based on the curvature of the target shape to ensure accurate machining by compensating the tool path, allowing the tool to closely follow the target shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the tool moves along a tool path made by connecting a plurality of command points by straight lines, then the tool path can be simply defined, but the tool may veer away from or cut into the target shape between command points, resulting in machining errors
Solution Approach 1:
The tool path is segmented into multiple command points along the curved target shape. By dividing the continuous curved path into discrete segments connected by straight lines, the system approximates the curve while maintaining simple definition. Increasing the number of segments improves accuracy without significantly increasing complexity.
Solution Approach 2:
The patent applies curvature adjustment to command points based on the target shape's curvature characteristics. Command points are positioned to account for the curvature of the target surface, allowing straight-line connections to better approximate curved paths and reduce veering or cutting errors.
2Device complexity
If the position of command points is not appropriate, then the tool path definition remains simple, but the tool may veer away from or cut into the target surface at command points, causing errors
Solution Approach 1:
The system performs preliminary positioning of command points based on curvature calculation before actual machining. By pre-calculating optimal command point positions that account for target surface curvature, the system ensures accurate tool path definition without adding complexity to the machining process itself.
3Device complexity
If uniform density of command points is used, then the tool path definition is simple, but the tool may not accurately follow curved portions of the target shape
Solution Approach 1:
The patent implements variable density distribution of command points based on local curvature characteristics. Areas with high curvature receive higher density (more command points) to accurately follow the curved shape, while low curvature areas use lower density. This local adaptation improves machining accuracy without uniformly increasing complexity throughout the entire tool path.
Data Source
AI summary
A tool path compensation device according to an aspect of the present disclosure includes: a tool path acquisition unit which acquires tool path information that specifies a tool path on which a tool machining a workpiece moves by way of a plurality of command points through which the tool should pass; a tool shape acquisition unit which acquires tool shape information that specifies a shape of the tool; a target shape acquisition unit which acquires target shape information specifying a target shape after machining of the workpiece; and a density adjustment unit which adjusts a density of the command points, so that the density of the command points becomes larger as curvature of the target shape increases.