Electric spark machining method for inverted cone micropores

A processing method and micro-hole processing technology, which is applied in the field of electric discharge machining of inverted cone micro-holes, can solve the problems that cannot be adapted to the micro-hole processing of fuel injectors, and achieve the effect of rapid industrial application

Inactive Publication Date: 2012-05-30
SUZHOU MINGGUNA TECH
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  • Abstract
  • Description
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Problems solved by technology

The EDM micro-hole machining method in the prior art cannot adapt to the micro-hole machining of fuel injectors of the Euro IV emission standard

Method used

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  • Electric spark machining method for inverted cone micropores
  • Electric spark machining method for inverted cone micropores

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Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: An EDM machining method for inverted taper micro-holes is realized by using an EDM micro-hole machining device to detect the machining depth of the hole in real time, and control the pulse power supply parameters and servo feed speed of the EDM device to make the pulse power supply The discharge energy increases gradually with the increase of machining depth; the servo feed speed decreases gradually with the increase of machining depth. When machining micro-holes, first process with a fixed discharge energy to about half the depth of the hole to be processed, then gradually increase the discharge energy of the pulse power supply, and gradually adapt to reduce the servo feed speed until the discharge energy of the pulse power supply at the exit The initial 120%, and the servo feed speed is 80% of the initial, which gradually increases the probability of secondary discharge at the exit of the micro-hole, thus realizing the machining of the inverted-taper micro...

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Abstract

The invention discloses an electric spark machining method for inverted cone micropores, which is implemented by an electric spark micropore machining device. The method is characterized by comprising the flowing steps of: in real-time, detecting the machining depth of the pores, controlling pulse power supply parameters and servo feeding speed of the electric spark machining device, gradually increasing the discharging energy of a pulse power supply along with the increase of the machining depth; gradually reducing the servo feeding speed along with the increase of the machining depth, and gradually increasing the secondary discharging ratio at a miropore outlet, and machining the inverted cone micropores. The method changes the control method of the electric spark machining for the micropores so as to implement the electric spark machining for the inverted cone micropores.

Description

Technical field [0001] The invention relates to an electric spark machining method, in particular to an electric spark machining method of an inverted cone micro-hole. Background technique [0002] During EDM, one pole of the pulse power supply is connected to the tool electrode and the other pole is connected to the workpiece electrode. Both poles are immersed in a liquid medium with a certain degree of insulation (usually kerosene, mineral oil or deionized water), and the tool electrode is automatically fed The adjustment device is controlled to ensure that the tool and the workpiece maintain a small discharge gap (0.01~0.05mm) during normal processing. When the pulse voltage is applied between the two poles, the liquid medium at the closest point between the poles under the current conditions is broken down to form a discharge channel. Due to the small cross-sectional area of ​​the channel and the extremely short discharge time, the energy is highly concentrated. The instanta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H9/14
Inventor 高强张筱云阎伟王觉鸣周建明
Owner SUZHOU MINGGUNA TECH
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