Six-Axis Interpolation Turning for Collision-Free Undercut Machining
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Solution Overview
Problem
Existing interpolation turning methods are limited by fixed tool chuck inclination and rigid workpiece holders, leading to inaccessible machining areas and collision risks, especially for asymmetrical workpieces with rotationally symmetrical sections.
Innovation Solution
A method and machine tool employing six-axis simultaneous interpolation turning, allowing flexible tool positioning relative to the workpiece, with simultaneous control of three translational and two rotary axes, enabling continuous adjustment of the tool's engagement with the workpiece to avoid collisions and access previously inaccessible areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed tool chuck inclination is used in interpolation turning, then the machine structure is simpler, but machining areas become inaccessible and collision risks increase
Solution Approach 1:
The patent applies dynamics by making the tool chuck inclination adjustable during machining operations. The tool bearing is designed to incline the height axis S about the A and/or B axes, allowing the inclination angle to be dynamically changed based on the workpiece geometry and machining requirements. This resolves the contradiction by enabling the system to adapt its configuration rather than being fixed, thus improving accessibility to difficult-to-reach areas while maintaining structural simplicity through controlled adjustability.
Solution Approach 2:
The patent changes the parameter of tool chuck inclination angle from a fixed value to a variable parameter that can be adjusted during machining. The control system enables continuous adjustment of the inclination angle to optimize the cutting tool's engagement with the workpiece, allowing access to previously inaccessible machining areas without fundamentally redesigning the machine structure.
2Stability of the object's composition
If rigid workpiece holder is used, then the workpiece positioning is stable, but the workpiece and tool cannot move relative to each other to avoid collisions
Solution Approach 1:
The patent introduces dynamic capability to the workpiece holder system by enabling rotational movement about height axis Z and linear displacement parallel to it. The mounting direction M of the workpiece holder can be inclined with respect to height axis Z, allowing the workpiece to move relative to the tool during machining. This maintains positioning stability through controlled motion rather than rigidity, resolving the contradiction between stability and adaptability.
3Device complexity
If constant tool chuck inclination is maintained, then the control system is simpler, but complex workpiece geometries cannot be machined without collisions
Solution Approach 1:
The control system is designed to dynamically adjust the tool chuck inclination angle during machining operations. The numerical control device coordinates the movement of the tool bearing to incline the height axis S about the A and/or B axes, enabling the cutting tool to access complex workpiece geometries without collisions while maintaining relatively simple control logic through standardized motion control.
4Adaptability or versatility
If additional rotary axes are added for flexible tool positioning, then accessibility to machining areas improves, but the machine structure becomes more complex
Solution Approach 1:
The patent achieves flexible tool positioning by making existing axes multi-functional. The tool bearing not only supports standard linear movements but also provides inclination capability about A and/or B axes. The workpiece holder provides both stable mounting and rotational/displacement capability. This multi-functionality approach delivers enhanced adaptability without proportionally increasing structural complexity, as existing components perform multiple functions.
Data Source
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AI summary
Disclosed are a method and an electronic machine control and a machine tool with which a six-axis interpolation turning of rotationally symmetrical sections (7a) of workpieces (7) is possible.