Air Bearing Measuring Device for Wobble Deviation Control
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Solution Overview
Problem
Conventional measuring devices face precision issues due to wobble deviations between the slidable platform and horizontal guide rails in machine tools, leading to decreased machining accuracy, and the diffraction grating's susceptibility to loosening affects measurement accuracy.
Innovation Solution
A measuring device comprising a standard element and a first contour measuring probe with a tip extension that contacts a standard plane, allowing for precise calculation of deviation errors by comparing real movement paths with predetermined paths, using air bearings to minimize friction and maintain contact during measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a diffraction grating is fixed on the bottom surface of the slidable platform to measure wobble deviation, then measurement capability is provided, but the diffraction grating becomes loose due to platform movement, causing measurement errors
Solution Approach 1:
The patent introduces an air bearing as an intermediary between the slidable platform and the diffraction grating. The air bearing provides a stable, frictionless support that maintains the diffraction grating's position relative to the platform during movement, eliminating the loosening problem while preserving measurement capability
Solution Approach 2:
The patent uses pneumatic air bearings to support the diffraction grating on the slidable platform. The air pressure generated by the air bearing creates a stable, non-contact support system that prevents the diffraction grating from loosening during platform movement, thereby maintaining measurement reliability
2Ease of operation
If the slidable platform slides on horizontal guide rails with gaps, then the machine tool can move, but wobble occurs due to the gap, decreasing machining precision
Solution Approach 1:
The patent replaces the traditional mechanical contact-based gap measurement with an optical measurement system using a laser device and diffraction grating. This substitution allows the platform to move freely on the guide rails while the optical system accurately measures the wobble deviation, enabling both mobility and precision
Solution Approach 2:
The patent implements a feedback mechanism where the laser device continuously measures the wobble deviation of the slidable platform during movement. The measured deviation information is fed back to allow for real-time compensation or analysis, enabling the system to maintain awareness of position accuracy while preserving platform mobility
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
The solution enables high-precision measurement of deviation errors, reducing the impact of wobble and maintaining accuracy by ensuring consistent contact between the measuring probe and standard planes, thereby enhancing machining precision.
Implementation Method 1
using air bearings to minimize friction and maintain contact during measurement
Data Source
AI summary
An exemplary measuring device includes a standard element, a first contour measuring probe, and a controller. The standard element has a first standard plane opposite to a measured object. The first contour measuring probe has a tip extension. The controller is electrically connected to the first contour measuring probe. The tip extension contacts the first standard plane during a measuring process. In addition, a method for using the measuring device is also provided.