Powder-mixed near-dry type electric spark machining device and method thereof

A processing method and processing device technology, which is applied in the field of mixed powder quasi-dry EDM devices, can solve the problems of difficult discharge of electric corrosion products, affect processing quality, and high processing short-circuit rate, so as to improve processing stability and processing stability Good, low roughness effect

Inactive Publication Date: 2009-03-18
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In-gas processing is considered to be a method that may replace in-liquid processing, but its processing short circuit rate is high. One of the main reasons is that the processing gap is small and the electro-corrosion products are not easy to discharge.
At the same time, part of the molten metal generated during the discharge process will stick to the surface of the part during the splashing process, which will affect the processing quality.

Method used

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  • Powder-mixed near-dry type electric spark machining device and method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The two output terminals of the pulse power supply 8 are respectively connected with the workpiece 7 and the tool electrode 6 . The control system controls to keep the tool electrode 6 and the workpiece 7 at a certain gap. The solid-liquid mixture is contained in the liquid cup 4, and the stirring device 3 stirs it evenly. The air compressor 1 is connected with the micro-quantity lubrication device 2, and the air and the solid-liquid mixture are mixed through the micro-quantity lubrication device to transfer the gas-liquid-solid three-phase flow mixture to Tubular tool electrode 6. The desired shape is machined by electric discharge at different corresponding positions between the electrode and the workpiece.

[0027] The processing polarity is negative, the pulse width is 2.4μs, the pulse interval is 5.6μs, the current is 1.6A, the servo voltage is 100V, the workpiece material is stainless steel, the electrode is copper, the tool electrode is copper tube, the outer di...

Embodiment 2

[0029] The processing polarity is negative, the pulse width is 2.4μs, the pulse interval is 5.6μs, the current is 25.6A, the servo voltage is 100V, the workpiece material is stainless steel, the electrode is copper, the tool electrode is copper tube, the outer diameter is 4mm, the inner diameter is 2mm, and the speed is 1000 / min, the air pressure is 0.6MPa, the powder is aluminum powder, the particle size is 5μm, the concentration is 2g / L, the liquid is kerosene, and the flow rate of solid-liquid mixture is 1.5ml / min. Using layered milling, the layered thickness is 20 μm, and the milling length is 15 mm. The surface roughness of the processed workpiece is Ra 1.7μm, and the material removal rate is 0.25mm 3 / min.

Embodiment 3

[0031] In this embodiment, the gas supply pressure is 0.2 MPa; the particle size of the silicon powder is 5 μm, and the concentration in the liquid is 0.5 g / L; the flow rate of the liquid-solid mixture is 3 ml / min; the rest are the same as those in Embodiment 1 and will not be repeated here.

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Abstract

The invention discloses a mixed powder quasi-dry typed electric spark processing device and a method, which has the advantages of low processing roughness, high precision, good processing stability, quick processing speed and the like. The structure of the electric spark processing device comprises an electric spark processing machine tool; the pipe-shaped tool electrode of the electric spark processing machine tool is connected with a slight lubrication device which is connected with an air compressor.

Description

technical field [0001] The invention relates to a special processing technology, in particular to a powder mixing quasi-dry electric spark processing device and a method thereof. Background technique [0002] At present, EDM technology is an indispensable and important part of advanced manufacturing technology. With the development of high and new technologies such as information technology, network technology, aviation and aerospace technology, and material science and technology, EDM technology is also moving towards a deeper level. , a higher level of development, occupying an important position in the processing of difficult-to-machine materials, complex profiles, molds and other processing fields. In-gas processing is considered to be a method that may replace in-liquid processing, but its processing short circuit rate is high. One of the main reasons is that the galvanic corrosion products are not easy to discharge because of the small processing gap. At the same time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H1/00B23H1/08B23H1/10
Inventor 高清张勤河苏树朋李永明王锋
Owner SHANDONG UNIV
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