NC Machining Path Analysis for Burr-Prone Corner Chamfering
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Solution Overview
Problem
Existing methods for preventing burrs on machined workpieces require time-consuming modifications to machining programs, making them inefficient.
Innovation Solution
A numerical control apparatus that includes an analysis unit to analyze machining programs and identify protruding corner parts prone to burrs, adding a curvilinear path to these parts to prevent burr formation during machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a machining path for chamfering is added to the machining program to prevent burrs, then burr prevention is achieved, but the time required to modify the machining program increases significantly
Solution Approach 1:
The protruding corner part identification unit performs preliminary analysis of the machining program to identify protruding corner parts before actual machining. This allows the system to pre-determine where burrs will occur and automatically generate appropriate chamfering paths, eliminating the need for manual program modification after burr occurrence is observed.
Solution Approach 2:
The numerical control apparatus performs self-analysis and self-modification of the machining program. The analysis unit and protruding corner part identification unit automatically examine the machining program, identify problematic areas, and the control unit automatically adds chamfering paths, making the system self-sufficient without requiring external manual intervention.
2Reliability
If manual modification of machining programs is performed to add chamfering paths, then burr occurrence is prevented, but the complexity and difficulty of program modification increases
Solution Approach 1:
The patent replaces manual mechanical program editing with an automated computational system. The analysis unit and protruding corner part identification unit use computer-based algorithms to automatically analyze machining programs, identify protruding corner parts, and generate modified paths, substituting manual operator intervention with automated intelligent processing.
Solution Approach 2:
The protruding corner part identification unit acts as an intermediary between the machining program and the control unit. It receives the machining program, identifies protruding corner parts, and provides this information to the control unit which then automatically generates appropriate chamfering paths, simplifying the overall process by introducing a specialized intermediate component.
3Manufacturing precision
If chamfering paths are added to prevent burrs on protruding corner parts, then machining quality improves, but the machining time increases
Solution Approach 1:
Instead of applying chamfering to all corners or entire workpieces, the system uses the protruding corner part identification unit to selectively identify only those specific corners where burrs will occur. Chamfering paths are then added only to these localized areas, maintaining surface quality where needed while minimizing unnecessary machining operations elsewhere.
Solution Approach 2:
The system applies chamfering only partially - specifically to protruding corner parts identified by the analysis unit - rather than applying it universally to all corners or features. This partial action approach prevents burrs where they would occur while avoiding the productivity loss that would result from unnecessary chamfering operations on all features.
Data Source
AI summary
The purpose is to provide a numerical control device that can easily suppress the occurrence of burrs. The numerical control device comprises: an analysis unit that analyses a processing program for processing a workpiece in a machine tool; and a corner specifying unit that specifies the corner that causes burrs on the workpiece based on the analyzed processing program.