A method for precision machining of micro group holes and application thereof

By forming a sealed chamber between the workpiece and the fixture and using pressure to drive the medium jet, parallel and uniform finishing of micro-holes in aero-engines was achieved, solving the problems of long processing cycles and poor consistency in existing technologies, and improving processing efficiency and quality.

CN121624791BActive Publication Date: 2026-07-14NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202610162258.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-05
Publication Date
2026-07-14
Estimated Expiration
2046-02-05

AI Technical Summary

Technical Problem

Existing technologies are insufficient for efficiently and uniformly processing thousands of tiny holes on high-end equipment such as aero engines. They suffer from long processing cycles, inconsistent processing conditions for each hole, and inability to guarantee overall processing consistency, thus failing to meet the requirements of industrialized mass production.

Method used

By forming a sealed chamber between the workpiece and the fixture, an abrasive mixture or gas flow medium is injected into the chamber using a pressure-driven device. The driving medium is simultaneously ejected from all pre-made holes, achieving parallel and uniform grinding and polishing of micro-holes. It can also be combined with electrolytic machining or pneumatic jetting to integrate multiple processing techniques to improve efficiency and quality.

Benefits of technology

It enables the efficient processing of hundreds of micro-holes, ensuring the consistency of hole wall surface quality and group hole size, simplifying the process, reducing material consumption and process changeover, and improving production efficiency and process reliability.

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Abstract

The present application belongs to the technical field of micro-hole machining, and particularly relates to a precision machining method for micro-group holes and application. The present application realizes one-time, parallel and homogenization finishing of array micro-holes by constructing a unified pressure environment, greatly improves the machining efficiency, and fundamentally guarantees the consistency of group hole size and surface quality. The basic process can be combined with electrolytic machining technology according to specific needs to improve the removal rate of difficult-to-machine materials, or integrated with laser drilling and corresponding liquid protection, surface coating and other auxiliary means to form a highly flexible and adaptable precision machining system. The present application systematically solves the inherent bottlenecks of traditional serial or local machining methods in efficiency, consistency and surface integrity, and is particularly suitable for batch manufacturing of high-density and high-quality micro-group holes on key components such as turbine blades and combustion chamber flame tubes of an aero-engine.
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Citation Information

Patent Citations

  • Device for removing internally crossed tidy hole burrs by compositing electrolyte and micro-fine grinded powder

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  • Revolving body part laser prefabricating group hole grouping dynamic electrolytic machining device and method

    CN117943641A