Machining method for fuel nozzle precise small hole

A precision small hole and fuel nozzle technology, which is applied in the field of precision small hole processing of fuel nozzles, can solve the problems of fuel nozzle angle difference, low production efficiency and pass rate, high labor intensity, etc., achieve good coaxiality and improve processing quality , the effect of reducing labor intensity

Inactive Publication Date: 2018-01-09
AECC AVIATION POWER CO LTD
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AI Technical Summary

Problems solved by technology

During the grinding process, the hand-held steel wire grinding process is used, which is easy to cause the precision small holes of the parts to be trumpet-shaped, and the hole shape is elliptical, which makes the angle of the fuel nozzle out of tolerance
This process method has high labor intensity, low production efficiency and qualified rate

Method used

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  • Machining method for fuel nozzle precise small hole
  • Machining method for fuel nozzle precise small hole
  • Machining method for fuel nozzle precise small hole

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Embodiment Construction

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described herein are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] Such as figure 1 As shown, the diameter of the precision hole of the fuel nozzle to be processed is φ0.69 +0.025 mm, the large hole is φ2.8mm, and the beating of the small hole to the large hole is 0.013.

[0020] 1. Production preparation and processing plan for machining precision small holes of fuel nozzles:

[0021] (1) The semi-finishing production preparation for the precision small hole of the fuel nozzle is:

[0022] A turning and milling ...

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Abstract

The invention discloses a machining method for a fuel nozzle precise small hole. The machining method of drilling, reaming and small hole punching is adopted. Firstly, the small end of a component issubjected to semi-finishing, and the precise small hole is extruded and machined through a punching bar. According to the machining technology, linkage is tight, the machining size consistency is good, coaxiality is good, and the fuel nozzle debugging qualification rate can be effectively increased. According to the precise small hole punching method, the situation that by means of an original steel wire precise small hole grinding method, a hole is ground into a horn mouth is effectively avoided, and the precise small hole machining quality can be improved through the punching machining method. Ultrafine machining of the fuel nozzle precise small hole is conducted through punching, the component machining quality is improved, the fuel nozzle manual debugging workload is reduced, the laborintensity of production workers is reduced, and the production efficiency is improved by 50% or above compared with the original technology.

Description

technical field [0001] The invention relates to the field of machining precision small holes of fuel nozzles, in particular to a processing method for precision small holes of fuel nozzles. Background technique [0002] The fuel nozzle material of a certain type of aircraft engine is 9Cr18 martensitic stainless steel, the structure is shown in the figure, and the precision hole is φ0.69 +0.025 mm Its function is to spray fuel from the small hole, control the flow and angle of the fuel, and directly affect the stability of the nozzle. [0003] At present, the central small hole processing method is drilling φ0.66 on the CNC lathe +0.025 mm hole, then manually grind the hole to φ0.69 +0.025 mm, the roughness is Ra0.4μm. After the heat treatment of the fuel nozzle, the hardness reaches HRC55-60, and the length of the straight section of the small hole is only 0.3mm. During the grinding process, the hand-held steel wire grinding process is used, which can easily cause the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P17/02
Inventor 张强虎许斌席丽娜杨能阁董少锋刘点李国峰朱婷
Owner AECC AVIATION POWER CO LTD
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