Roundness Measuring Apparatus Parallel Motion Compact Footprint
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Solution Overview
Problem
Conventional roundness measuring apparatuses require large installation spaces and are prone to significant measurement errors due to temperature changes caused by the expansion and contraction of long arms.
Innovation Solution
A roundness measuring apparatus with a two-dimensional moving mechanism that allows the detector holder to move parallel to the measurement plane, reducing the required installation space and minimizing the impact of temperature changes on measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a long arm is used to allow the detector to reach the measurement point, then the measurement capability is improved, but the installation space required increases and temperature-induced measurement errors worsen
Solution Approach 1:
The patent repositions the column from the right side to the back side of the base, and changes the arm's movement from radial extension to parallel movement relative to the measurement plane. This dimensional reconfiguration allows the detector to reach the measurement point through a different spatial pathway, reducing the footprint area while maintaining measurement capability.
Solution Approach 2:
Instead of extending the arm radially outward from the rotation axis, the patent inverts the approach by having the column and arm structure move parallel to the measurement plane from the back side. This inversion of the mechanical arrangement achieves the same measurement function with reduced installation space.
2Adaptability or versatility
If a long arm is used to reach the measurement point, then the measurement capability is improved, but measurement precision deteriorates due to temperature-induced expansion and contraction
Solution Approach 1:
The patent changes the arm's movement direction from radial (along the measurement plane) to parallel to the measurement plane. This dimensional change ensures that temperature-induced expansion and contraction occur perpendicular to the measurement direction, making their effect on measurement precision negligible while preserving measurement capability.
3Adaptability or versatility
If the column is positioned at the right side of the base, then the arm can move radially to contact different cylinder surfaces, but the installation space required increases
Solution Approach 1:
The patent moves the column from the right side to the back side of the base and changes the arm's movement from radial to parallel relative to the measurement plane. This repositioning allows the detector to contact different cylinder surfaces through parallel movement, reducing the required installation footprint while maintaining measurement flexibility.
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 apparatus achieves a compact installation space and reduces measurement errors by eliminating the need for a long arm, thereby minimizing the influence of temperature fluctuations on the measurement results.
Implementation Method 1
the expansion and contraction of long arms
Data Source
AI summary
A roundness measuring apparatus, which has a small space required for installation and of which measurement error due to a temperature change is small, is disclosed. The roundness measuring apparatus includes: a base; a turn-table which is fixed to the base and rotates a work placed on the turn-table; a two-dimensional moving mechanism provided at the base so as to move a holder holding part in parallel to a measurement plane including a rotation axis of the turn-table and a measuring point of the work; a detector holder attached to the holder holding part; and a detector attached to the detector holder so that a probe can be displaced on the measurement plane.