A method for surface treatment of stainless steel servo valve spool pair

A technology of surface treatment and treatment method, which is applied in the finishing process of stainless steel servo valve precision matching slide valve pair, and the surface treatment field of stainless steel servo valve slide valve pair, which can solve the problem of high rejection rate and low processing efficiency, etc. question

Active Publication Date: 2020-10-23
北京实验工厂有限责任公司
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Problems solved by technology

At present, there is no effective method for the deburring of precision matching parts for servo valves, because the existing deburring technology alone cannot guarantee both deburring and micron-level machining accuracy of parts, so manual removal is generally used. Low efficiency and high scrap rate. In the current high-quality and high-reliability environment of the aerospace industry, manual methods need to be improved urgently

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  • A method for surface treatment of stainless steel servo valve spool pair

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Embodiment

[0054] A method for surface treatment of a stainless steel servo valve spool valve pair. The spool valve pair includes a valve core and a valve sleeve. The valve sleeve has a radial round hole, a radial square hole and an axial through hole. The hole is used to cooperate with the spool, such as figure 1 shown;

[0055] The method includes a treatment method for the outer surface of the valve core and a treatment method for the inner and outer surfaces of the valve sleeve, wherein the steps of the treatment method for the outer surface of the valve core include:

[0056] (11) The valve core is processed according to the structural design requirements of the valve core by means of turning and milling machine processing, and a process margin is left during the process of turning and milling machine, and the process margin is 0.2mm;

[0057] (12) adopting the outer contour centrifugal finishing method to carry out surface finishing and deburring to the valve core that step (11) o...

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Abstract

The invention relates to a surface treatment method for stainless steel material servo valve slide valve matching parts, in particular to a finishing process method for the stainless steel material servo valve precise matching slide valve matching parts (a valve core, a valve sleeve), and belongs to the technical field of precise machining. The finishing process (process flow) for the matching parts mainly aims at part precise machining process, different deburring process methods are added between each procedure, and each process method uses machining parameters according to the characteristics of part structure, dimensional accuracy and the like, that is, the purpose of deburring the matching parts is finally achieved through combination of the multiple deburring methods.

Description

technical field [0001] The invention relates to a method for surface treatment of a stainless steel servo valve slide valve pair, in particular to a stainless steel servo valve precision matching slide valve pair finishing process method, which belongs to the technical field of precision processing. Background technique [0002] Servo valve is an important component of aerospace servo mechanism, which has the characteristics of complex structure, high dimensional accuracy and difficult processing. In order to realize the function of electro-hydraulic conversion, the design of the servo valve adopts the coupling structure with multiple micron-level clearances, among which the coupling clearance of the spool valve pair is required to be 3-5 μm; the cylindricity of the matching shaft and hole is 1 μm, so It is extremely sensitive to burrs, even micron-scale burrs will hinder the normal movement of the coupling, and even cause the servo valve to fail in severe cases. The parts ...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F15B13/02B24B1/00B24B31/00B24B33/02C25F3/24
CPCB24B1/00B24B31/00B24B33/02C25F3/24F15B13/021
Inventor丁宇亭杨增辉朱晨曦杨强董超刘文轩傅思阳赵建斌何理论乔树林
Owner北京实验工厂有限责任公司