Five-Axis Machine Tool Head Layout to Reduce Column Overhang
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Solution Overview
Problem
Existing machine tools with two rotary feed axes and three linear feed axes suffer from increased weight and overhang, leading to deformation of the column and reduced machining accuracy due to the protrusion of the moving body.
Innovation Solution
Incline one of the rotary feed axes, specifically the C-axis pivot shaft, to shift the center of gravity towards the column, reducing the overhang and minimizing deformation of the column and saddle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the moving body including two rotary feed axes and spindle head is positioned to control tool posture, then the functionality is improved, but the overhang from the column increases causing deformation
Solution Approach 1:
The patent applies asymmetry by inclining one of the rotary feed axes (specifically the C-axis) relative to the other (A-axis). This asymmetric configuration shifts the center of gravity of the moving body toward the column, reducing overhang and preventing torsional deformation while maintaining the ability to control tool posture through coordinated rotation of both axes
2Adaptability or versatility
If the moving body is extended to accommodate rotary feed axes and spindle head, then the operational capability is improved, but the weight increases causing column deformation
Solution Approach 1:
The patent introduces a dimensional change by inclining the C-axis rotary feed axis at an angle (typically 45 degrees) relative to the horizontal A-axis. This spatial reconfiguration in three-dimensional space allows the moving body to achieve the necessary operational capability while positioning its center of gravity closer to the column support, effectively reducing the detrimental effects of weight-induced deformation
Data Source
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AI summary
Provided is a machine tool having two rotary feed shafts that control the orientation of a tool and three linear feed shafts that move the location of a workpiece relative to the tool, wherein the machine tool is provided with: a main shaft having a tip to which the tool is mounted; a main shaft head that supports the main shaft such that the main shaft can rotate around a main shaft axis of rotation; a main shaft head support part which supports the main shaft head such that the main shaft head can rotate around a first axis that extends perpendicular to the main shaft axis of rotation; a first rotary feed shaft device which is provided in the main shaft head support part, and rotates and feeds the main shaft head around the first axis; a saddle which supports the main shaft head support part such that the main shaft head support part can rotate around a second axis that is perpendicular to the first axis and inclined with respect to the vertical direction; and a second rotary feed shaft device which is provided in the saddle, and rotates and feeds the main shaft head support part around a second axis of rotation.