Tool Path Correction Using Average Distance Extraction
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Solution Overview
Problem
Existing tool path generation methods for numerical control machine tools often result in step differences and surface irregularities due to positional offsets between machining points, making it difficult to achieve a smooth machined surface.
Innovation Solution
A method and apparatus that calculate distances from a correction machining point to nearby machining points, extract points within a predetermined distance, calculate an average position value, and correct the machining point data to generate a new tool path, thereby reducing positional offsets and smoothing the machined surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If approximation curves are calculated for multiple tool paths to derive auxiliary points, then the tool path generation accuracy is improved, but the processing time increases
Solution Approach 1:
The patent extracts only the essential information needed for tool path generation by calculating distances from machining points to the machined surface and selecting points within a predetermined distance range. This avoids the complex calculation of full approximation curves while retaining the necessary geometric relationships for accurate tool path generation.
Solution Approach 2:
The patent segments the tool path generation process into distinct steps: calculating distances from machining points to the machined surface, selecting points within a predetermined distance range, and generating the tool path based on these selected points. This segmentation allows each step to be optimized independently, reducing overall processing time while maintaining accuracy.
2Manufacturing precision
If complex approximation curve calculations are performed, then the machined surface smoothness is improved, but the device complexity increases
Solution Approach 1:
The patent uses simple distance calculations and point selection instead of complex approximation curves. This approach uses computationally inexpensive operations that can be performed quickly and discarded, replacing the need for complex, time-consuming curve calculations while achieving the same goal of smooth tool path generation.
3Manufacturing precision
If more calculation steps are added to derive auxiliary points, then the tool path accuracy is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent performs preliminary actions by calculating distances from machining points to the machined surface and pre-selecting points within a predetermined distance range before generating the final tool path. This preliminary processing simplifies the main tool path generation step while ensuring accuracy, making the overall process easier to implement and operate.
Data Source
AI summary
A tool path is generated with procedures that include: one of the processing points (Pi) on a multiple rows of tool paths (PA) obtained by connecting multiple prescribed processing points sequentially with straight lines is set as a revision processing point (Pt), points on the multiple rows of tool paths are set as distance calculation points (Pu), and the distance (L) from the revision processing point (Pt) to each of the distance calculation points (Pu) is calculated; the distance calculation points (Pu′) for which the distance (L) is within a prescribed value (ΔL) are extracted; the mean values of the position data for the distance calculation points (Pu′) and the position data for the revision processing point (Pt) are calculated; and the position data is revised by means of the mean values, and a new tool path (PA′) is created.