Bunched electrode high-speed discharge processing method

A cluster electrode and discharge machining technology, which is applied in the field of cluster electrode high-speed discharge machining, can solve problems such as limitations of processing methods, achieve reliable processing performance, realize processing, and process a wide range of applications

Active Publication Date: 2011-06-15
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in the methods of short arc machining disclosed in the above technologies, the relative movement between the tool electrode and the workpiece is used to achieve forced me

Method used

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  • Bunched electrode high-speed discharge processing method
  • Bunched electrode high-speed discharge processing method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Using the machine tool 3 with only a single spindle automatic servo feed and retract function, the proper arc discharge gap between the cluster electrode 1 and the workpiece 2 to be processed is maintained through the feed of the spindle. The area of ​​the end surface of the cluster electrode 1 is 500mm 2, the material is graphite, the material of workpiece 2 to be processed is titanium alloy (model TC4), the short arc processing is carried out by using the power parameters of peak voltage 50V, peak current 635A, pulse width 2000μs and pulse interval 200μs, and the water-based working fluid is cutting emulsification The working hydraulic pressure provided by the flushing system is 1.5MPa and the flow rate is 25L / min. Under these processing conditions, the material removal rate of titanium alloy TC4 that can be obtained through simple spindle sinking processing is as high as 6844mm 3 / min, this processing speed is much higher than the maximum material removal rate that c...

Embodiment 2

[0031] Change the workpiece material to fully verify the universal applicability of cluster electrode high-speed electric discharge machining to different materials. The workpiece material is selected as superalloy (GH4169), and the other processing conditions in Example 1 are kept unchanged. The material removal rate of superalloy GH4169 is as high as 6350mm 3 / min.

Embodiment 3

[0033] Select workpiece material to be carbon steel (S45C), keep other processing conditions constant in embodiment 1, the material removal rate of carbon steel S45C is up to 4320mm 3 / min.

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Abstract

The invention discloses a bunched electrode high-speed discharge processing method in the technical field of arc discharge processing. A bunched electrode is fixedly connected with a spindle of a machine tool, the end surface of the bunched electrode faces to a workpiece to be processed on an operating platform of the machine tool, and the workpiece can be immersed in a water-based operating fluid provided by a water-based operating fluid supply system; then a fluid loop is formed by the water-based operating fluid supply system, the bunched electrode and a machine tool operating fluid trough, and a current loop is formed by a discharge source, the bunched electrode, the interelectrode broken-down water-based operating fluid and the workpiece to be processed; the water-based operating fluid between the bunched electrode and the workpiece to be processed is circulated through the water-based operating fluid supply system; the bunched electrode is connected with the negative electrode of the discharge source, the workpiece to be processed is connected with the positive electrode of the discharge source, and direct current or pulse current is applied by the discharge source to form short arc discharge, so that the high-speed discharge processing is realized. The invention realizes strengthened high pressure and large flow fluid filling in multiple holes by utilizing the bunched electrode, ensures short arc discharge processing by applying a fluid hydrodynamic force arc-breaking mechanism and is a method capable of simply, conveniently and economically realizing the high-speed discharge processing of the bunched electrode, particularly the processing of curves and mold cavities.

Description

technical field [0001] The invention relates to a processing method in the technical field which adopts a fluid dynamic arc breaking mechanism to realize short arc discharge and aims at material removal, in particular to a high-speed discharge processing method for cluster electrodes. Background technique [0002] Realizing the high-speed and high-efficiency processing of high-hardness, high-toughness, high-strength and high-brittleness materials has always been the goal in the field of material processing. EDM has the advantages of small macro force, non-contact processing, etc., and the processing process is not affected by the mechanical properties of materials, thus providing an effective method for processing difficult-to-cut materials. EDM is a discharge machining method that realizes thermal erosion of materials by spark discharge between electrodes. Due to the nature of spark discharge, it is difficult to achieve high-efficiency machining with high discharge energy....

Claims

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Application Information

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IPC IPC(8): B23H1/00
Inventor 赵万生顾琳李磊向小莉
Owner SHANGHAI JIAO TONG UNIV
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