Machine Tool Frame Layout for Directional Force Transfer
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Solution Overview
Problem
Existing machine frames for machine tools, particularly laser cutting tools, face challenges in force transmission and rigidity, leading to insufficient fixation in the X-direction for short machines and oversized fastenings in the Y-direction for long machines, affecting part accuracy and resonance.
Innovation Solution
A machine frame design featuring two longitudinal members and two transverse members with specifically positioned and geometrically optimized floor fastening units, including triangular cross-sectional geometry and surface elements, to predominantly transmit forces and torques in the X and Y directions, enhancing rigidity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple floor fastenings are attached to the frame for force transmission, then force transmission capability is improved, but the fastenings become oversized for long machines and insufficient for short machines
Solution Approach 1:
The floor fastening system is segmented into two distinct types: first floor fastening units for X-direction force transmission attached to longitudinal members, and second floor fastening units for Y-direction force transmission attached to transverse members. This segmentation allows each fastening type to be optimized independently for its specific function and machine size requirements.
Solution Approach 2:
The patent implements dynamic adaptability by allowing the number and positioning of floor fastening units to be adjusted based on machine length. Short machines can use fewer fastenings while long machines can incorporate more, optimizing the force transmission system for each specific machine size without requiring oversized fastenings for all configurations.
2Manufacturing precision
If the machine frame is designed for high rigidity to improve part accuracy, then manufacturing precision is improved, but resonance issues may increase
Solution Approach 1:
The floor fastening system is designed to dynamically adapt to operational conditions by providing optimized force transmission paths for different directions and machine configurations. This dynamic capability allows the frame to maintain high rigidity for precision while avoiding resonance by distributing forces through appropriate fastening units based on the specific operational state.
Data Source
AI summary
A machine frame for a machine tool is disclosed having two longitudinal members running in a first direction and two transverse members connecting the longitudinal members and running in a second direction running transversely to the first direction, wherein the longitudinal members and the transverse members define a machining space for the machine tool, at least two, preferably at least four, first floor fastening units for the predominant transmission of forces in the first direction into a foundation, wherein the first floor fastening units are fastened to end regions of the longitudinal members, and at least two second floor fastening units for the predominant transmission of forces in the second direction into the foundation, wherein the second floor fastening units are fastened to at least one of the longitudinal members in its central region, wherein the at least one of the longitudinal members has a cross-sectional geometry for the predominant force transfer in the second direction.