A method for ultrasonic electromagnetic rheological composite grinding and polishing of slender tubes with ultra-high aspect ratio

By employing an ultrasonic-electro-rheological composite machining method, which utilizes a composite polishing technology combining ultrasound, electromagnetic fields, and rheological fluids, the problems of low efficiency and dust pollution in the surface finishing of slender tubes with ultra-large aspect ratios have been solved. This method enables efficient and environmentally friendly one-step processing of both inner and outer surfaces, and is applicable to the nuclear industry, shipbuilding, and aerospace fields.

CN117961657BActive Publication Date: 2025-12-02HUNAN UNIV
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Patent Information

Application Number
CN202410293303.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-14
Publication Date
2025-12-02
Estimated Expiration
2044-03-14

AI Technical Summary

Technical Problem

Existing technologies are difficult to perform internal and external surface finishing on slender tubes with ultra-large length-to-diameter ratios in an efficient and environmentally friendly manner. Problems such as abrasive accumulation, dust pollution, and low processing efficiency exist. Furthermore, existing tools are difficult to design and have low processing efficiency.

Method used

An ultrasonic electromagnetic rheological composite processing method is adopted, which uses a composite polishing technology of ultrasound, electric field and magnetic field to form a high-strength semi-solid chain structure on the inner and outer surfaces of a slender tube by using electromagnetic composite rheological fluid, so as to achieve simultaneous processing of the inner and outer surfaces. The same process control system and rheological fluid circulation and recovery system are used.

Benefits of technology

It improves processing efficiency, reduces costs, avoids dust pollution, and achieves efficient finishing of the inner and outer surfaces of slender tubes in a single process, meeting the requirements of industrial production.

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Abstract

This invention provides an ultrasonic electromagnetic rheological composite grinding and polishing method for ultra-large aspect ratio pipes. The method is characterized by: using a composite polishing method combining ultrasound, electric field, and magnetic field to simultaneously perform ultra-precision machining on the inner and outer surfaces of the ultra-large aspect ratio slender pipe (21); forming a composite field of ultrasound and electromagnetic field on the outer surface of the slender pipe, forcing the electromagnetic composite rheological fluid in the composite field to transform from a liquid into a high-strength semi-solid chain structure, forming a flexible polishing brush head to complete the outer surface machining; forming a composite field of ultrasound and magnetic field inside the slender pipe, forcing the grinding fluid (15) and its contained abrasive particles in the composite field to rotate along the inner pipe wall under the action of the composite field, completing the inner pipe machining; the same electromagnetic composite rheological fluid is used for both the inner and outer surface machining of the slender pipe. This method achieves simultaneous machining of the inner and outer surfaces in one process, greatly reducing machining time and improving machining efficiency while meeting the pipe machining requirements.
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Citation Information

Patent Citations

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