发动机不锈钢喷管沟槽工装

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By designing a tooling fixture for the stainless steel nozzle groove of an engine, and utilizing friction and bolt fixing, the problems of long processing cycle and insufficient precision of nozzle groove are solved, achieving efficient and precise nozzle processing.

CN224509086UActive Publication Date: 2026-07-17BEIJING AEROSPACE EXCELLENCE PRECISION MASCH MFG CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: BEIJING AEROSPACE EXCELLENCE PRECISION MASCH MFG CO LTD
Filing Date: 2025-08-14
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

In the existing technology, the processing cycle of engine nozzle grooves is too long, the fitting accuracy of the inner and outer walls is difficult to meet the requirements, and the nozzle is easily scratched.

Method used

A tooling for a stainless steel nozzle groove in an engine was designed, including a support structure, a top cover, and reinforcing ribs. The support structure is hollow and conforms to the inner wall of the nozzle groove. It is fixed by friction and bolts to ensure the positional stability of the nozzle during processing. The tooling is made of ductile iron QT450 to improve the structural rigidity.

Benefits of technology

It improves the machining accuracy and production efficiency of nozzle grooves, reduces the risk of nozzle scratches, and meets the needs of high-precision and high-efficiency machining.

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Abstract

本实用新型涉及发动机不锈钢喷管沟槽工装，包括支撑结构、顶盖和加强筋，支撑结构为中空结构，与喷管沟槽内壁随形；支撑结构上端通过螺栓与顶盖固定连接，内部通过加强筋进行轴向支撑；加工沟槽时喷管沟槽内壁套在支撑结构外壁面，通过摩擦力稳定所述工装与喷管沟槽内壁的相对位置关系，并通过螺栓对二者进行固定。本实用新型优化了喷管沟槽的加工方案，可操作性很强，解决了喷管沟槽内壁在铣沟槽时加工周期过长，喷管内外壁配合精度无法满足要求，且容易划伤喷管的问题，提高了生产效率，有效的保证了喷管的精度。

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Claims

1. An engine stainless steel nozzle slot tooling characterized by, It includes a support structure, a top cover, and reinforcing ribs. The support structure is hollow and conforms to the inner wall of the nozzle groove. The upper end of the support structure is fixedly connected to the top cover by bolts, and the interior is axially supported by reinforcing ribs. When machining the groove, the inner wall of the nozzle groove is fitted onto the outer wall of the support structure. The relative position of the tooling and the inner wall of the nozzle groove is stabilized by friction. The inner wall of the nozzle groove and the support structure are fixed together by bolts.

2. The engine stainless steel nozzle groove tooling of claim 1, wherein, The support structure includes a conformal support section and an extension section. The outer wall of the conformal support section is provided with an anti-slip pad to increase the static friction between the inner wall of the nozzle groove and the support structure. The bottom of the extension section is fixedly connected to the outside by bolts.

3. The engine stainless steel nozzle groove tooling of claim 2, wherein, The conformal support section and the extension section are transitioned by rounded corners.

4. The engine stainless steel nozzle groove tooling of claim 3, wherein, After the inner wall of the nozzle groove is fitted onto the outer wall of the support structure, the transition position of the conformal support section and the extension section corresponds to the outlet position of the inner wall of the nozzle groove. The support structure and the outlet of the inner wall of the nozzle groove are fixed by bolts.

5. The engine stainless steel nozzle groove tooling of claim 1, wherein, The supporting structure, top cover, and reinforcing ribs are all made of ductile iron QT450.

6. The engine stainless steel nozzle groove tooling according to claim 1, characterized in that, The thickness of the supporting structure ranges from 40 to 70 mm.

7. The engine stainless steel nozzle groove tooling of claim 6, wherein, The thickness of the top cover is consistent with the thickness of the supporting structure.

8. The engine stainless steel nozzle groove tooling of claim 1, wherein, The reinforcing ribs are evenly provided with multiple weight-reducing holes, the diameter of which does not exceed Φ200mm.

9. The engine stainless steel nozzle groove tooling of claim 1, wherein, The top cover is provided with lifting holes for lifting and transferring the tooling.

10. The engine stainless steel nozzle groove tooling of claim 1, wherein, The top cover has multiple threaded holes at different locations to accommodate support structures of different diameters.