X-Ray Inspection Bearing Adjustment for Circular Rotation Accuracy
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Solution Overview
Problem
Conventional X-ray inspection apparatuses face challenges in achieving a perfect circular rotation locus for the object being inspected, leading to reduced accuracy in reconstructed images due to deformation of the outer race of the rolling bearing, which affects the rotation mechanism's precision.
Innovation Solution
A rotation mechanism for X-ray inspection apparatuses that includes a rolling bearing with adjustable outer race, utilizing multiple adjustment members arranged in the circumferential direction to deform and fix the outer race, ensuring a perfect circular rotation locus through precise adjustment and fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the outer race of the rolling bearing is press-fitted and fixed on the inner circumferential side of the outer race fixer, then the outer race can be fixed to the table holding member, but the outer race may deform depending on the shape of the inner circumferential surface of the outer race fixer
Solution Approach 1:
The invention performs preliminary adjustment of the outer race shape using adjusting members before final fixation. The outer race is adjusted to have a predetermined shape (perfect circle) while still in the adjustable state, then fixed in this optimized configuration. This preliminary action prevents the deformation problem that would occur with direct press-fitting, as the outer race is now in its optimal shape before being permanently secured.
2Measurement precision
If the outer race is adjusted to achieve a perfect circular rotation locus, then the rotation accuracy is improved, but the device complexity increases due to the need for adjustment members and adjustment processes
Solution Approach 1:
The invention changes the shape parameter of the outer race using adjusting members that apply localized forces. By modifying the geometric parameters of the outer race (its circularity and roundness), the system achieves high rotation locus accuracy. The adjusting members enable controlled parameter changes without requiring complex automated systems, as manual or semi-automated adjustment suffices for this application.
3Manufacturing precision
If the outer race is made deformable to allow adjustment, then the rotation locus can be optimized, but the structural strength and rigidity of the outer race may be compromised
Solution Approach 1:
The outer race is designed to be temporarily deformable only during the adjustment phase, not during operation. Adjusting members apply controlled forces to modify the outer race shape to a perfect circle, after which the adjustment members are removed or locked. The outer race then maintains its optimized shape through its inherent rigidity during rotation, achieving both precision and strength without compromise.
Data Source
AI summary
In the rotation mechanism for an X-ray inspection apparatus, a plurality of adjustment members configured to adjust the shape of an outer race of a bearing by deforming the outer race are arranged in a circumferential direction of the bearing. The adjustment members are movable relative to an adjustment member holder in a diameter direction of the bearing and contactable with an outer circumferential surface of the outer race. A gap S configured to allow deformation of the outer race is formed between the outer circumferential surface of the outer race and the adjustment member holder in the diameter direction of the bearing.