A method for manufacturing a fine flow channel elbow polishing compensation structure

Through topological optimization design and computational fluid mechanics methods, the distribution of fluid and velocity field is improved, and the problem of uneven polishing of precision runner bends in abrasive flow polishing technology is solved, achieving uniform polishing and structural integrity of the bend part.

CN118789369BActive Publication Date: 2024-12-13ZHEJIANG UNIV
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Patent Information

Application Number
CN202411290290.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-14
Publication Date
2024-12-13
Estimated Expiration
2044-09-14

AI Technical Summary

Technical Problem

The existing abrasive flow polishing technology is difficult to achieve uniform polishing when the precision runner bends, resulting in uneven inner wall surfaces and cannot meet the requirements of high-precision products.

Method used

Through topological optimization design, the fluid and velocity field and pressure field distribution are improved, and SolidWorks and ANSYS Workbench are used for geometric modeling and meshing. Combined with numerical methods of calculating fluid mechanics, the runner structure is optimized and the wall thickness is increased to generate a manufacturable flow. The track body forms a "crescent-type" groove and symmetrical structure, suppresses the return region, and achieves the uniformity of the flow characteristics and pressure field.

Benefits of technology

The uniform polishing of the bent pipe part is achieved, the over-polishing problem during the high-speed abrasive flow polishing process is solved, and the structural integrity and polishing quality of the precision runner bent pipe is improved.

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Abstract

The present invention discloses a method for manufacturing a fine flow channel bend polishing compensation structure. The method extracts the flow channel diameter, the turning radius, and the turning angle based on the original bend part of the precision flow channel arc transition, thereby performing structural compensation on the abrasive flow polishing bend part; adopts the pipeline fluid topology optimization method, establishes a mathematical model with the solid isotropic penalty interpolation model SIMP (Solid Isotropic Material with Penalization) topology optimization theory, and solves the mathematical model with the OC optimization criterion topology optimization solution algorithm to reduce the pressure loss and make the velocity field in the flow domain uniformly distributed, thereby determining the length of the variable cross-section structure size of the flow channel bend part, as well as the amplitude change of the cross-section part. The present invention determines the compensation structure for the precision flow channel bend part, effectively avoiding the uneven polishing phenomenon generated during the fluid abrasive flow polishing bend process.
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