NC Machining Path Segmentation for Stable Tool-Workpiece Posture
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Solution Overview
Problem
Existing machining technologies result in uneven surface roughness due to continuous changes in the relative posture of tools and workpieces, necessitating time-consuming program edits to maintain stability.
Innovation Solution
A numerical control device that includes a relative posture setting unit, a dividing unit, and an axis control unit to divide machining blocks or cycles into sections, ensuring stable relative postures throughout the program route by setting division points and controlling tool or workpiece movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the relative posture continuously changes partway through a block, then the machining efficiency is improved, but the surface roughness becomes uneven
Solution Approach 1:
The patent divides a machining block into multiple sections based on relative posture stability requirements. Each section maintains a stable relative posture configuration, allowing continuous machining while preventing surface roughness issues. The control device automatically identifies division points where posture changes should occur, segmenting the continuous machining path into manageable stable-posture segments.
2Manufacturing precision
If the block is divided into pieces to maintain stable relative posture, then the surface roughness is improved, but the program editing time increases
Solution Approach 1:
The control device automatically performs the block division and program correction functions without requiring manual intervention. The system analyzes the machining parameters and relative posture requirements, then autonomously divides blocks and adjusts feed rates at division points. This self-service capability eliminates the time-consuming manual program editing while maintaining stable relative postures throughout machining.
3Manufacturing precision
If the relative posture is kept stable throughout the program route, then the machining surface quality is improved, but the machining flexibility is reduced
Solution Approach 1:
The system dynamically adjusts the relative posture at automatically identified division points while maintaining stability within each section. The control device modifies feed rates and positioning commands at these division points to enable posture transitions, allowing the machining program to adapt to different surface quality requirements without manual editing. This dynamic approach preserves machining flexibility while ensuring stable postures during critical cutting operations.
Data Source
AI summary
The present invention performs continuous machining while keeping the relative attitude of a tool and a workpiece stable during a program route and thus prevents unevenness occurring in a machining surface of the workpiece. This numerical control device is for a machining tool that performs machining while changing the relative position and relative attitude of a tool and a workpiece in accordance with a program and is provided with: a relative attitude setting unit that sets the relative attitude of the tool and the workpiece during each block or cycle of the program; a dividing unit that provides one or more division points in each block/cycle to divide the block/cycle into two or more sections; and a shaft control unit that moves the tool and workpiece relative to each other such that the tool and the workpiece take the relative attitude set by the relative attitude setting unit in at least one section among the two or more sections.