Machine Tool Column Layout for Lower Torsional Tool Displacement
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Solution Overview
Problem
Existing machine tools experience displacement due to torsion during machining, which can lead to reduced precision and accuracy.
Innovation Solution
The column design includes a mounting surface for the up-down guide portion and an intersection guide portion positioned closer to the workbench than the mounting surface, which reduces the distance from the rotation center of torsion to the tool tip, thereby minimizing displacement due to torsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the column is designed with conventional guide portion positioning, then the structure is simpler, but the displacement due to torsion increases
Solution Approach 1:
The patent positions the intersection guide portion not only in the vertical dimension but also extends it forward toward the workbench in the horizontal dimension. This spatial repositioning moves the torsion rotation center closer to the workbench, reducing the lever arm and minimizing tool displacement during machining operations.
Solution Approach 2:
The patent changes the positional parameter of the intersection guide portion relative to the mounting surface. By positioning the intersection guide portion forward of the mounting surface in the front-back direction, the design alters the column's torsional characteristics, moving the rotation center to a more favorable location that reduces machining displacement.
2Manufacturing precision
If the intersection guide portion is positioned closer to the workbench, then the displacement due to torsion is reduced, but the column structure becomes more complex
Solution Approach 1:
The column's guide system is segmented into two distinct portions: the mounting surface for the up-down guide and the separately positioned intersection guide portion. This segmentation allows independent optimization of each guide's position, enabling the intersection guide to be placed forward of the mounting surface to reduce torsional displacement without compromising the up-down guidance function.
Solution Approach 2:
The intersection guide portion acts as an intermediary element that mediates between the column's structural requirements and the machining precision requirements. By positioning this guide portion forward, it serves as a strategic intermediate structure that reduces the effective lever arm for torsional forces, thereby minimizing tool displacement while maintaining overall structural integrity.
Data Source
AI summary
Provided is a column. In this machine tool, a spindle head extends in the Z-axis direction and is disposed on the front surface of a column through a Y-axis moving mechanism. A rotary table is located forward of the spindle head. The spindle head is movable in the Y-axis direction (up-down direction) by being guided by a pair of guides that are mounted on mounting surfaces of the column. The mounting surface is located at a left front end of a right wall. The mounting surface is located at a right front end of a left wall. The column is movable in the Z-axis direction (front-back direction) through sliding members thereof being guided by a pair of guides. The sliding member has a portion located further forward than the mounting surfaces in a plan view.