Tooling and method for removing burrs from aero-engine fuel injectors using abrasive flow technology

Abstract

The invention discloses a tooling and a method for removing burrs from an aeroengine fuel injector by using an abrasive flow process. The tooling includes an upper clamp and a lower clamp for clamping the fuel injector. The upper clamp is set at a position opposite to the inlet of the fuel injector. There is a central hole for the abrasive grain flow to enter the inlet of the fuel injector; the lower fixture is provided with a conical diversion structure at the position opposite to the conical surface of the conical nozzle hole of the fuel injector, and the taper of the conical diversion structure is consistent with the conical shape The conical surface of the nozzle hole has the same taper, the upper part of the conical diversion structure extends into the outlet of the nozzle, and there is a gap between the conical diversion structure and the conical surface of the nozzle hole for the outflow of abrasive particles; There is a discharge hole, and the discharge hole is used for the abrasive grain flow flowing out of the outlet of the fuel injector to flow out of the lower fixture. The invention can remove the burr of the spray hole of the fuel injection nozzle of the aero-engine with high efficiency and high consistency, and overcomes the defects caused by the traditional processing technology.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and in particular relates to a tool and a method for removing burrs from an aeroengine fuel injection nozzle by using an abrasive particle flow process. Background technique [0002] At present, the micro-holes of aero-engine injector parts are mostly processed by mechanical processing. The advantage is high processing efficiency, but the disadvantage is that it is easy to cause high roughness of the nozzle hole and a large number of burrs on the surface of the nozzle hole. At present, sandpaper, grinding head, etc. are mainly used as auxiliary tools for deburring nozzle holes of aero-engines, and manual deburring methods are used. Manual deburring is inefficient and poor in consistency, and there are often phenomena such as unclean deburring. Moreover, the through-hole diameter of the nozzle is small, and it is difficult for general tools to enter, and some burrs are difficult to completely r...

AI Technical Summary

Problems solved by technology

When the current fixture designed for this type of injector is in use, the abrasive flow is quickly ejected from the nozzle hole of the injector and the outlet hole of the fixture under the action of pressure, and the abrasive flow cannot remove the dust at the lower end of the injection port Burrs on the edge of the conical surface of the conical orifice

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