Eccentric Work Spindle Mounting for 5-Axis Gigacasting
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Solution Overview
Problem
Existing machine tools struggle to efficiently machine complex geometries in large-volume workpieces, particularly gigacasting components, due to limitations in multi-axis machining capabilities and spindle positioning, leading to reduced productivity and increased machine footprint.
Innovation Solution
A machine tool design featuring a base frame with independently movable machining units and a work spindle mounted eccentrically from pivot axes, allowing for five-axis simultaneous machining with reduced spindle pitch and interference contours, utilizing a horizontal main machining direction and symmetrical fork heads for enhanced rigidity and accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional machine tool design with centrally mounted spindle is used, then the machine structure is simple, but the spindle travel distance is long and interference contours occur during five-axis machining
Solution Approach 1:
The patent applies asymmetry by mounting the work spindle eccentrically at a distance from the pivot axes rather than centrally. This asymmetric positioning allows the spindle to achieve five-axis machining capability with reduced travel distance and minimized interference contours, resolving the contradiction between structural simplicity and machining efficiency
2Adaptability or versatility
If multi-axis machining capabilities are added to machine large-volume workpieces, then machining versatility is improved, but machine footprint and complexity increase
Solution Approach 1:
The patent merges multiple machining units onto a single machine platform, sharing common structural elements and control systems. This consolidation provides multi-axis machining versatility for large-volume workpieces while minimizing the overall machine footprint by avoiding redundant separate machines
3Productivity
If five-axis simultaneous machining is implemented, then productivity is increased, but machine complexity and control difficulty increase
Solution Approach 1:
The patent implements a computer-controlled system that automatically coordinates all five motion units and machining operations. The control system self-manages the complex five-axis simultaneous machining by integrating motion control, tool path calculation, and process parameter optimization, enabling high productivity without proportionally increasing operational complexity
Data Source
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AI summary
The invention relates to a single- or preferably multi-spindle machine tool (1) with at least one five-axis machining unit (28.1) by means of which a work spindle is linearly movable in the direction of a first to third linear axes (X, Y, Z) and pivotable about a first and second pivot axes (36, 37). In order to optimize the machine tool (1) for machining particularly large-volume workpieces, it is proposed that the work spindle (13) be mounted eccentrically at a distance (E) from the first and second pivot axes (36, 37).