Columnar Structure Positioning for Uniform Coating
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Solution Overview
Problem
Existing methods for coating columnar structures, such as cylindrical and honeycomb structures, face challenges in achieving precise alignment and uniform coating due to manual labor requirements, leading to inefficiencies and potential flaws or cracks in the coating, which affect properties like thermal shock resistance and mechanical stress.
Innovation Solution
A method and device for positioning a columnar structure that uses a positioning fixture and a positioning adjustment fixture to support the structure at three or four points, ensuring precise alignment of the central axis with the seat, thereby maintaining a constant distance and preventing unnecessary contact, which allows for improved coating uniformity and reduced flaws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If centering boards with circular arc configuration are used to abut on the outer circumferential surface, then the coating can be applied, but the precision of axis coincidence fluctuates according to the circumferential configuration
Solution Approach 1:
The positioning device is divided into multiple independent centering boards (at least two) that can be independently adjusted. Each centering board contacts the columnar structure at separate locations, allowing independent control of positioning to eliminate fluctuations caused by circumferential configuration variations.
Solution Approach 2:
The centering boards are designed to be movable relative to each other and to the columnar structure. This dynamic adjustment capability allows the positioning system to adapt to different circumferential configurations and maintain consistent axis coincidence precision throughout the coating process.
2Manufacturing precision
If manual labor is used for coating, then skilled workmen can apply coating, but it takes a large amount of man-hours and reduces efficiency
Solution Approach 1:
The positioning device is designed to automatically position the columnar structure without requiring skilled manual intervention. The self-positioning mechanism uses the columnar structure's own geometry to achieve precise alignment, eliminating the need for skilled workmen while maintaining coating quality.
Solution Approach 2:
Manual mechanical positioning is replaced with an automated positioning system that uses mechanical principles (centering boards, support surfaces) to achieve alignment automatically. This substitution maintains positioning precision while dramatically reducing manual labor requirements and increasing productivity.
3Ease of operation
If the central axis of the columnar structure is shifted toward the centering board that first contacts the outer circumferential surface, then positioning is achieved, but the precision of axis coincidence is unduly impaired
Solution Approach 1:
The positioning operation is segmented into multiple independent contact points through at least two centering boards. This segmentation ensures that no single contact point can cause unwanted axis shifting, as each board independently maintains its position relative to the columnar structure's central axis.
Solution Approach 2:
The positioning system is designed beforehand to prevent axis shifting by distributing contact forces across multiple centering boards. This pre-designed distribution cushions against the harmful effect of premature contact at any single location, maintaining axis coincidence precision throughout the positioning process.
4Manufacturing precision
If clearance between the outer circumferential surface and leveling board is made small to avoid contact, then coating can be applied, but coating thickness increases and cracks are produced during drying
Solution Approach 1:
The positioning system dynamically maintains optimal clearance between the columnar structure and leveling board throughout the coating process. The movable centering boards allow continuous adjustment to ensure consistent, appropriate clearance that prevents both excessive coating thickness and contact-induced defects, thereby maintaining coating integrity during drying.
Data Source
AI summary
The method and the device for positioning a columnar structure which can promote properties of the resulting columnar structure, such as thermal shock resistance, isostatic strength, thermal stress, mechanical stress, and the like, and can exhibit improved productivity due to excellent drying performance of the coated areas by approximation of the central axis of the columnar structure and the central axis of the seat, thereby flattening the coating thickness when a coating is applied to the outer circumferential surface of the columnar structure, are provided. After causing the positioning fixture to abut on the seat mounting the columnar structure thereon, the columnar structure is moved from the seat using a positioning adjustment fixture placed opposing the positioning fixture, while keeping the columnar structure to abut on the positioning adjustment fixture at one or two points, thereby causing the columnar structure to abut on the positioning fixture.