Magnetic Dual-Target Fixture for Single-Cycle CNC Axis Measurement
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Solution Overview
Problem
Existing methods for measuring machine tool accuracy are time-consuming and prone to error due to the need for multiple setups and limited reference circles, which can overlook inaccuracies in untraversed areas and introduce positioning errors.
Innovation Solution
A device with two spaced measuring elements and a spacer element, allowing for simultaneous measurement of multiple axes with minimal setup adjustments, using a probe or other point-measuring systems, and featuring magnetic fastening for flexible attachment and a rigid connection to maintain a constant distance, reducing the impact of environmental changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple measurement setups are used to measure different axes, then measurement coverage is improved, but measurement time increases and positioning errors are introduced
Solution Approach 1:
The patent combines multiple measurement functions into a single integrated measurement setup. The measuring device includes a carrier with multiple measuring probes positioned at different locations, allowing simultaneous measurement of multiple axes and machine tool components without requiring relocation of the measurement setup.
Solution Approach 2:
The measurement device is designed as a universal system that can measure various machine tool axes (linear and rotary) and components (spindle, table, guides) using the same setup. The carrier can be positioned at different locations and the probes can measure different features, making the device multi-functional without requiring multiple specialized measurement setups.
2Measurement precision
If measurement setup is relocated to measure specific axes, then measurement accuracy for specific axes is improved, but additional error influences are introduced
Solution Approach 1:
The patent combines multiple measurement functions into a single integrated measurement setup. The measuring device includes a carrier with multiple measuring probes positioned at different locations, allowing simultaneous measurement of multiple axes and machine tool components without requiring relocation of the measurement setup.
3Device complexity
If limited reference circles are used for circularity tests, then measurement setup complexity is reduced, but machine inaccuracies in untraversed areas are overlooked
Solution Approach 1:
The patent extends measurement from limited circular paths to three-dimensional volumetric measurement. The multiple probes positioned at different heights and radial locations enable measurement of spherical surfaces and volumetric accuracy, covering areas beyond what single-plane circular tests can detect.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and accurate measurement of machine tool axes in a single cycle, improving calibration and reducing the need for complex revisions, while maintaining simplicity and flexibility in use.
Implementation Method 1
at least the first or the second fastening element has a magnet holder for fastening to the machine part of the numerically controlled machine tool
Data Source
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AI summary
The present invention relates to a device 1 for use on a numerically controlled machine tool 100 for use in a method for measuring the numerically controlled machine tool 100, comprising: a first measuring element 3 for measurement by a measuring device, a second measuring element 3 for measurement by the measuring device, a spacer element 2 on which the first measuring element 3 and the second measuring element 3 are arranged spaced apart from each other, a first fastening element 4 with a first fastening section for fastening the device 1 to a machine part 20 of the numerically controlled machine tool 100, and a second fastening element 4 with a second fastening section for fastening to the machine part 20 of the numerically controlled machine tool 100.wherein the first fastening element 4 and the second fastening element 4 are arranged spaced apart from each other on the spacer element 2 and at least the first or the second fastening element 4 has a magnetic holder for fastening to the machine part 20 of the numerically controlled machine tool 100.