Variable Multi-Axis Machine Tool Spindle Guidance
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Solution Overview
Problem
Conventional multi-axis machine tools face challenges in processing complex and fine shapes due to large body volume, increased processing errors with movement distance, complex structures, high costs, and excessive energy consumption, particularly in micro-processing fields.
Innovation Solution
A variable machine tool design that maximizes rotary motion with a mechanical structure incorporating two-axial rotary motion and three-axial translation, featuring a spindle smoothly guided by cross-arranged rotating frames with reduced friction, allowing precise posture adjustment and simplified configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-axis translation is used for processing, then the machine tool can process three-dimensional targets, but the structure becomes complex and the number of components increases
Solution Approach 1:
The patent combines multiple translation functions into a single rotating frame structure. The rotating frame integrates movements that would traditionally require separate linear axes, reducing the number of independent components while maintaining three-dimensional processing capability through coordinated rotation and tool positioning.
Solution Approach 2:
The patent transitions from static linear translation to dynamic rotary motion. The rotating frame allows the tool to access three-dimensional space through rotational movement rather than multiple independent linear translations, simplifying the mechanical structure while preserving versatility.
2Adaptability or versatility
If the tool moves over long distances to process complex shapes, then complete coverage is achieved, but processing error increases
Solution Approach 1:
The patent employs a rotating frame mechanism that moves the tool in curved, rotational paths rather than long linear translations. This spherical/curved motion pattern reduces the cumulative error associated with long-distance linear movements while still enabling complete coverage of complex three-dimensional surfaces.
3Productivity
If the tool moves faster or farther to process complex shapes, then productivity is improved, but energy consumption increases
Solution Approach 1:
The rotating frame mechanism enables efficient energy utilization by leveraging rotational inertia and smooth circular motion. The system can maintain higher processing speeds with lower energy input compared to linear translation, as rotational motion is inherently more energy-efficient for covering three-dimensional space.
4Adaptability or versatility
If a large body volume machine tool is used, then it can accommodate multi-axis movement, but the apparatus size increases
Solution Approach 1:
The patent replaces large linear translation mechanisms with a compact rotating frame structure. The rotation-based approach achieves multi-axis positioning within a smaller footprint, eliminating the need for extensive linear travel paths and reducing the overall machine tool volume while maintaining versatility.
Data Source
AI summary
According to an exemplary embodiment of the present invention, a variable machine tool capable of multi-axis machining includes: a base frame; a first rotating frame rotating on the base frame and comprising a first sliding member sliding along a circumference while being contact-supported through an interior diameter; a second rotating frame cross-disposed inside the first rotating frame to rotate in a direction crossing the first rotating frame, and comprising a second sliding member sliding along a circumference while being contact-supported through an interior diameter; and a spindle of which position and posture displacement is adjusted when the first sliding member and the second sliding member slide by interworking with rotation of the first rotating frame and the second rotating frame, the spindle being installed while passing through the first sliding member and the second sliding member.