A processing method of a crescent groove of aero-engine valve shell

Abstract

The invention relates to a method for machining an aero-engine valve casing crescent groove. The method is that an electrical sparkle machine tool and a detection device are installed on the same basic clamp (10), and a valve casing (7) subjected to electrical sparkle machining, an electric machining clamp (8) of the valve casing and a movable clamp (9) are integrally transferred to the basic clamp (10) of the detection device. In the mode, the clamping accuracy in the transferring process is ensured on the basis that the valve casing (7) is not dismounted. Due to the fact that the electrical sparkle machine tool and the detection device are installed on the same basic clamp (10), high-accuracy repeated clamping and positioning on the basic clamp (10) in the transferring process can be achieved.

Description

technical field [0001] The invention relates to a processing method for a crescent groove of an aero-engine valve housing, belonging to the technical field of product molding and processing. Background technique [0002] The fuel nozzle assembly (hereinafter referred to as the nozzle) is one of the key components that affect the performance and efficiency of the aero-engine combustor. Generally speaking, the combustion efficiency of the main combustion chamber of the engine depends on the fuel flow and fuel atomization effect, while the structural design and manufacturing accuracy of tiny precision parts such as valve housings, plungers and auxiliary nozzles have a great impact on the fuel flow and atomization of the nozzles. Effects are very important. With the continuous development of my country's aero-engine technology, the technical requirements for nozzles are getting higher and higher, and the requirements for nozzle processing and testing technology are also getting...

AI Technical Summary

Problems solved by technology

The part cannot be used with general fixtures such as vise, V-shaped block, and three-jaw chuck, which makes it difficult to clamp the part during EDM and precision testing, resulting in inaccurate processing and measurement data.

This kind of problem is due to the high dimensional accuracy of the parts. Even if the same clamping datum is used in EDM and precision testing in conventional processing methods, the positioning accuracy during repeated clamping is still difficult to meet the technical requirements, resulting in tiny precision parts such as nozzles. When the key dimension of the machine is out of tolerance, it can only be "out of tolerance for use" or "scrap", and cannot be repaired

Therefore, the above-mentioned conventional processing method can only be used for the final inspection of nozzle-like tiny precision parts-judging whether the parts are qualified or not, it cannot be used for rework and clamping of parts, and the pass rate of nozzle-like tiny precision parts is low

Images