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

A technology of guiding mechanism and reverse taper hole, which is applied in electric processing equipment, electrode manufacturing, metal processing equipment, etc., can solve the problems of affecting the flow coefficient of the nozzle hole, adversely affecting the fuel injection efficiency, and improving the efficiency, and achieve the effect of uniform loss.

Inactive Publication Date: 2010-04-14
TSINGHUA UNIV
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  • Claims
  • Application Information

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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 in conjunction with the accompanying drawings.

[0024] figure 1 Shown is the embodiment of the present invention, the micro electrode servo drive mechanism and the micro electrode loss automatic compensation mechanism of the micro electric discharge machining device to form the micro back taper hole electric discharge machining device.

[0025]In this device, the micro electrode loss automatic compensation mechanism 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 between the normally open wire clamping mechanism 41 and the fine inverted taper hole EDM electrode. between motion-guiding mechanisms. The fine electrode wire 2 is clamped by a normally closed clamp wire mechanism 33, and the normally closed clamp wire mechanism 33 is affixed to the lower end of the connecting rod 35 through the...

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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 guidegroove 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 uppersurface 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 mov e 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 isarranged 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 micromachining, and relates to a movement guiding mechanism of a microscopic reverse taper electric discharge machining electrode. Background technique [0002] With the continuous development of micro-EDM technology, the minimum pore diameter of EDM micro-holes can reach several microns, the dimensional accuracy can reach the micron level, and the surface roughness can reach the sub-micron level. On the other hand, with the progress and development of science and technology, some advanced industrial products have put forward special requirements for micro-hole processing. For example, with the increasing requirements for motor vehicle exhaust emission standards in various countries, higher requirements are put forward for the fuel injection system of motor vehicle engines. The fuel injector is the core component of the fuel injection system, and the shape and dimensional accuracy of the nozzle h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H7/26B23H7/10B23H9/14
Inventor 李勇刘伟徐明刚吕善进贾维溥
Owner TSINGHUA UNIV
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