Tool Path Discretization Using Interaction-Based Support Point Removal
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Solution Overview
Problem
Existing numerically controlled machining methods often result in long sequences of control commands with many support points, which can be challenging for numerical controlled machines to process, potentially leading to deviations in workpiece geometry and surface quality.
Innovation Solution
A method is proposed to optimize the tool path by comparing interaction parameters at each support point and removing points where changes are minimal, resulting in a shorter discretized tool path that maintains the predetermined workpiece geometry, using thresholds for force, torque, temperature, and movement trajectory changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a long sequence of control commands with many support points is used, then the workpiece geometry precision is improved, but the device complexity and processing difficulty increase
Solution Approach 1:
The patent extracts and removes redundant support points from the control command sequence that do not contribute to maintaining workpiece geometry precision. By comparing interaction parameters (force, torque, temperature) between consecutive support points, the method identifies and eliminates points where parameter changes are minimal, thereby reducing sequence complexity while preserving essential geometric accuracy.
Solution Approach 2:
The patent uses interaction parameters (force, torque, temperature) as criteria for evaluating and reducing support points. By monitoring changes in these physical parameters between consecutive support points and comparing them against thresholds, the method dynamically determines which support points can be removed without compromising workpiece geometry precision.
2Manufacturing precision
If a long sequence of control commands with many support points is used, then the workpiece geometry precision is improved, but the processing time increases
Solution Approach 1:
The patent extracts and removes redundant support points from the control command sequence that do not contribute to maintaining workpiece geometry precision. By comparing interaction parameters (force, torque, temperature) between consecutive support points, the method identifies and eliminates points where parameter changes are minimal, thereby reducing sequence length and processing time while preserving essential geometric accuracy.
3Manufacturing precision
If a long sequence of control commands with many support points is used, then the workpiece surface quality is improved, but the tool wear and deflection risk increase
Solution Approach 1:
The patent extracts and removes redundant support points that do not contribute to surface quality. By analyzing interaction parameters between consecutive support points, the method identifies points where tool interaction with the workpiece is minimal, removing these points to reduce cumulative tool wear and deflection risk while maintaining surface quality at critical locations.
Solution Approach 2:
The patent uses interaction parameters (force, torque, temperature) as criteria for evaluating and reducing support points. By monitoring changes in these physical parameters between consecutive support points and comparing them against thresholds, the method dynamically determines which support points can be removed without compromising workpiece surface quality, thereby reducing tool wear and deflection.
Data Source
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AI summary
The invention relates to a method for providing a discretised tool path for machining a workpiece to obtain a predetermined workpiece geometry. The method comprises providing a first discretised tool path for machining the workpiece with a pre-determined numerical controlled machine, wherein the first discretised tool path is defined by a first sequence of support points; providing for each support point of the first sequence of support points at least a value for at least one interaction parameter describing an interaction of the tool with the workpiece; comparing at least one support point, except for the first and last support point of the first sequence of support points, of the first sequence of support points and the associated value of the at least one interaction parameter of the support point with the subsequent support point and the value of the at least one interaction parameter associated with the subsequent support point; and removing the respective support point from the first sequence of support points based on the result of the comparison to obtain a second sequence of support points defining a second discretised tool path for machining the workpiece with the predetermined numerical controlled machine to obtain the predetermined workpiece geometry. Furthermore, a computer program for performing the method and a sequence of control commands for a numerical controlled machine obtained by the method is provided.