Angular Scale Positioning with Dual Gauges in Limited Swivel Range
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Solution Overview
Problem
Existing methods for positioning a body with an angular scale in angular measuring systems are limited by the need for full 360° rotation and are not efficient when the machine part's swiveling ability is restricted, leading to inaccuracies due to eccentricity and the complexity of using multiple dial gauges.
Innovation Solution
A method involving two stationary distance gauges positioned offset from each other on the angular scale, measuring distance values at multiple positions within a limited angular range, calculating offsets, and shifting the body to align it precisely within permissible tolerances, allowing for precise attachment without full 360° rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single dial gauge is used for positioning, then the equipment complexity is reduced, but the measurement precision deteriorates due to the requirement of exact circular movement
Solution Approach 1:
The positioning method is segmented into multiple discrete angular positions (at least three different angular positions) rather than requiring continuous circular movement. This allows the use of simple dial gauges while achieving accurate positioning through discrete measurements at specific angles, resolving the contradiction between equipment simplicity and measurement precision.
Solution Approach 2:
Instead of requiring the full 360° circular movement demanded by traditional single-dial-gauge methods, the invention uses partial angular ranges (at least three positions within a limited swiveling range). This partial action approach maintains measurement precision while reducing the complexity of exact circular path execution.
2Measurement precision
If full 360° rotation is required for positioning, then the measurement precision is improved, but the adaptability deteriorates when the machine part's swiveling ability is restricted
Solution Approach 1:
The invention changes the parameter of angular range from the traditional full 360° rotation to a limited swiveling range (at least three positions within a restricted angular range). By modifying this key parameter, the method achieves accurate positioning without requiring complete rotational capability, thereby improving adaptability to machine parts with limited swiveling ability while maintaining positioning accuracy.
3Measurement precision
If multiple dial gauges are used for positioning, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The invention introduces the angular dimension as a new measurement parameter. By measuring distances at multiple discrete angular positions rather than requiring continuous circular movement, the method achieves accurate positioning using simple dial gauges. This dimensional approach resolves the contradiction by maintaining measurement precision without increasing device complexity.
4Measurement precision
If the body is positioned using traditional methods, then the measurement accuracy is improved, but the productivity deteriorates due to the time-consuming alignment process
Solution Approach 1:
The invention performs preliminary positioning by attaching the body to the machine part in an approximate central position before the measurement process. This preliminary action reduces the time and effort required for final alignment, as the subsequent measurement and adjustment process starts from a pre-positioned state rather than a completely unaligned state, thereby improving productivity while maintaining measurement accuracy.
Data Source
AI summary
A method for positioning a body that has a surface extending along a circular arc, includes: attaching the body to a machine part that is capable of swiveling; attaching a stationary, first distance gauge; attaching a stationary, second distance gauge; determining three first distance values and three second distance values at three defined angular positions of the machine part different from each other; calculating a first offset value, based on the three first distance values and the corresponding angular positions, and a second offset value, based on the three second distance values and the corresponding angular positions; shifting the body relative to the machine part, until the first offset value is determined by the first distance gauge and the second offset value is determined by the second distance gauge within permissible tolerances.