Full peripheral process unit for electric erosion machining valve bushes

Abstract

The invention discloses a full peripheral process unit for electric erosion machining valve bushes, and the full peripheral process unit provided by the invention can be used for improving the working efficiency and the machining precision, and the like. The technical scheme provided by the invention is as follows: the full peripheral process unit comprises an electrode assembly, wherein the electrode assembly is arranged corresponding to a valve bush fixedly clamped on a drive mechanism and can carry out axial or radial feed along the inner hole of the valve bush, the copper-tungsten alloy electrode of the electrode assembly is provided with raised shoulders, and the position and number of the raised shoulders are corresponding to those of throttling circular grooves of the valve bush; and the full peripheral process unit also comprises an oil groove for accommodating the valve bush. The full peripheral process unit disclosed by the invention is suitable for the processing of the valve bush with a plurality of throttling circular grooves.

Description

Technical field: [0001] The invention relates to a cylindrical valve element, in particular to an electrical discharge machining equipment with a cylindrical valve element. Background technique: [0002] With the rapid development of electro-hydraulic servo-hydraulic systems, the application fields of servo valves are becoming more and more extensive. Among the many parts of servo valves, it is more difficult to process the throttle groove of the valve sleeve. figure 2 It is a longitudinal cross-sectional view of the valve sleeve. The related dimensions of the throttle groove shown in the figure (such as A, B, B', etc.) require extremely high precision. The processing quality will directly affect the performance indicators and service life of the servo valve. Most of the valve sleeve throttle groove processing is completed by electro-erosion machine tools. The structure of the electro-erosion machine tool is that the machine tool has two sets of transmission mechanisms, one is to ...

AI Technical Summary

Problems solved by technology

[0003] 1. The throttling ring groove on the valve sleeve is processed in stages, it is difficult to accurately ensure the axial dimension accuracy between the ring grooves, which will seriously affect the performance of the servo valve;

[0004] 2. The double-rotation transmission mechanism is adopted. During processing, both the workpiece and the electrode are rotated, and the installation accuracy of the workpiece and the electrode is extremely high. In a machine tool with ordinary technical conditions, the machining error may be relatively large, and the structure of the machine tool is relatively large. complex;

[0005] 3. The existence of the above problems, in order to ensure the precision required by the servo valve, can improve the precision of the machine tool, or improve the operator's technical level, or carry out strict screening of the workpiece and other measures, but the result will greatly increase the production cost, and Extend the processing cycle;

[0006] 4. During processing, the cutting fluid passes through the oil pipe to wash and cool the workpiece, which will cause insufficient or uneven cooling and affect the processing quality;

[0007] 5. The processing of throttling ring grooves, double-rotation drive trains and cooling methods above makes it difficult for existing electro-erosion machine tools to meet the needs of large-scale production

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