A milling tool for a rocket engine bumper and a method of use

By designing milling fixtures and machining methods for rocket engine buffers, the deformation problem in milling holes of liquid rocket engine buffers was solved, enabling rapid clamping and efficient machining, and ensuring the accuracy and quality of the holes.

CN122322909APending Publication Date: 2026-07-03XIAN SPACE ENGINE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN SPACE ENGINE CO LTD
Filing Date
2026-04-29
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In the existing technology, the milling of buffers for liquid rocket engines suffers from problems such as dimensional deviations due to deformation, high scrap rates, and low processing efficiency.

Method used

A milling fixture for rocket engine buffers is adopted, including a fixture body, a tightening ring, a tightening wrench, and a tightening screw. This fixture enables rapid clamping and milling of the buffer. Roughing and finishing are performed using a five-axis machining center to avoid deformation and ensure the positional accuracy and sharp edge requirements of the holes.

Benefits of technology

It improves processing efficiency, reduces product deformation and rework, ensures the roundness and positional accuracy of holes, meets the requirements for sharp edges of hole openings, and reduces product scrap rate.

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Abstract

This invention provides a milling fixture and its application method for rocket engine buffers, aiming to solve the clamping problems during the processing of buffers and the high scrap rate caused by product deformation. The fixture mainly consists of a fixture body, a tightening ring, a tightening wrench, and tightening screws. Through the use of the fixture and the improvement of the processing method, product clamping is reliable and quick, effectively eliminating the product scrap problem caused by product deformation.
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