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Superfine back taper hole spark-erosion machining electrode movement guide mechanism

A technology of guide mechanism and reverse taper hole, which is applied in the field of fine reverse taper hole electric discharge machining electrode motion guide mechanism, can solve the problems of affecting the flow coefficient of the nozzle hole, improving and unfavorable fuel injection efficiency, etc., and achieve the effect of uniform loss

Inactive Publication Date: 2008-12-10
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

[0005] (1) In the micropores of traditional EDM, the aperture at the electrode inlet is larger, while the aperture at the electrode outlet is smaller, often presenting a "positive cone" hole, which affects the flow coefficient of the nozzle hole, which is not conducive to fuel injection efficiency improvement

Method used

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  • Superfine back taper hole spark-erosion machining electrode movement guide mechanism
  • Superfine back taper hole spark-erosion machining electrode movement guide mechanism
  • Superfine back taper hole spark-erosion machining electrode movement guide mechanism

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Embodiment Construction

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] figure 1 Shown is an embodiment of the micro-reverse taper hole EDM device composed of the micro-electrode servo drive mechanism and the micro-electrode loss automatic compensation mechanism of the present invention and the micro-EDM device.

[0025]In this device, the automatic compensation mechanism for fine electrode loss is mainly composed of a normally open wire clamping mechanism 41 and a normally closed wire clamping mechanism 33, and the normally closed wire clamping mechanism 33 is located in the normally open wire clamping mechanism 41 and the fine reverse taper hole EDM electrode between motion guides. The fine electrode wire 2 is clamped by the normally closed wire clamping mechanism 33, and the normally closed wire clamping mechanism 33 is fixedly connected to the lower end of the connecting rod 35 through the normally closed clamp bracket 34, and th...

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Abstract

The invention relates to an electrode movement guide mechanism for the electric spark processing of micro inverted taper holes and belongs to the technical field of the special micro machining. The mechanism adopts an external cylindrical surface of a rotating shaft to position the movement guidance of the micro electrode wires which are restricted and positioned into a rectangular guide groove which consists of a left cushion block and a right cushion block under the rotating shaft; the thickness of the cushion blocks is adjusted so as to cause the left cushion block and the rectangular guide groove to incline; the micro electrode wires incline to the axis of the rotating shaft for certain angle and the intersection point of the micro electrode wires and the axis is positioned at the upper surface of a work piece. When in processing, the micro electrode wires perform servo feed under the action of an automatic compensation mechanism for the micro electrode loss and at the same time move along a set conical surface driven by the electrode movement guide mechanism of the invention, thus processing the inverted taper holes on the work pieces. The electrode movement guide mechanism is arranged below a normal-closed screw clamping mechanism and forms an electric spark processing device for micro inverted taper holes with a micro electrode servo driving mechanism and the automatic compensation mechanism for the micro electrode loss to be used in the processing of micro inverted jet orifices of oil injection nozzles.

Description

technical field [0001] The invention belongs to the technical field of special micro-machining, and relates to a movement guide mechanism for a micro-reverse taper hole electric spark machining electrode. Background technique [0002] With the continuous development of micro-EDM technology, the minimum diameter of EDM micro-pores can reach several microns, the dimensional accuracy can reach the order of microns, and the surface roughness can reach the order of sub-microns. On the other hand, with the progress and development of science and technology, some advanced industrial products have put forward special requirements for micro-pore processing. For example, with the increasing requirements of various countries for the exhaust emission standards of motor vehicles, higher requirements are put forward for the fuel injection system of motor vehicles. As the core component of the fuel injection system, the shape and dimensional accuracy of the nozzle orifice have a very impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H7/26B23H9/14
Inventor 李勇刘伟徐明刚吕善进贾维溥
Owner TSINGHUA UNIV
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