High-instantaneous-energy-density electric spark high-speed milling method

An energy density, high-speed milling technology, applied in the field of mechanical processing, can solve problems such as reducing processing flexibility, achieve the effect of efficient processing and ensure processing stability

Inactive Publication Date: 2013-04-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing method is a forming processing method, that is, the tool electrode and the workpiece do not rotate relative to each other, which reduces the processing flexibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Using a machine tool with three-axis automatic servo feed and retract function, the spindle speed is 3000 r / min, the diameter of the tool electrode 1 is 10 mm, the diameter of the central flushing hole is 4 mm, and the material is high-purity graphite. The material of workpiece 2 is die steel 8407, and the pulse width is 3 ms, the pulse interval is 1 ms, the peak voltage is 80 V, and the peak current is 800 A. The working fluid is an oil-in-water emulsion with a water content of 95%. , the working fluid pressure provided by the internal flushing system is 0.5 MPa, and the outlet pressure of the working fluid provided by the external flushing system is 0.3 MPa. The machining trajectory is that the tool electrode is fed vertically downward by 5 mm, and then moves horizontally by 50 mm. A keyway structure is processed, and the material removal rate of the obtained mold steel 8407 is 8952 mm 3 / min.

Embodiment 2

[0023] Change the workpiece material to fully verify the universal applicability of high-speed arc discharge milling to different materials. The workpiece material is selected as titanium alloy (model TC4), and other processing conditions in Example 1 are kept unchanged. The material removal rate of TC4 is 14263 mm 3 / min.

Embodiment 3

[0025] Select the workpiece material as carbon steel (S45C), keep other processing conditions unchanged in Example 1, and the material removal rate of carbon steel S45C is 10127 mm 3 / min.

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Abstract

The invention relates to a high-instantaneous-energy-density electric spark high-speed milling method, which belongs to the field of machining. The method comprises the following steps of: connecting a rotary rod-like electrode with an inner flushing fluid hole with a negative electrode of a power supply, connecting a to-be-machined workpiece with a positive electrode of the power supply and melting to remove the workpiece material by utilizing high-instantaneous-energy-density spark discharge between the electrodes and the workpiece in a machining process; discharging molten material out of a discharge gap by working fluid which flows at a high speed; and cooling the machined workpiece. According to the method, by utilizing high-instantaneous-energy-density spark discharge and a high-pressure forced inner flushing fluid and low-pressure outer flushing fluid combined method, the stability and the high efficiency of machining are realized, and high-efficiency machining on any conductive material, including conventional difficult-to-machine materials such as engineering ceramic with weak conductivity and high-temperature alloy, can be realized.

Description

technical field [0001] The invention relates to a high-instantaneous-energy-density electrical discharge high-speed milling method, which belongs to the field of mechanical processing. Background technique [0002] At present, traditional processing methods are difficult to efficiently process some materials with high hardness, high strength, high toughness and high brittleness, and the processing cost is generally high. The processing of some nickel-based alloys, titanium-based alloys and some engineering ceramics commonly used in the aerospace field has always been a difficult problem in the processing field. Electric discharge machining provides an effective method for the processing of the above materials. Compared with expensive high-speed milling equipment and its processing cost, the electric discharge machining method reflects its good economy. EDM is a machining method that removes material by continuous spark discharge between the electrode and the workpiece to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H1/00B23H1/10B23H1/04B23H1/08
Inventor 刘永红张彦振王飞申泱唐泽民纪仁杰蔡宝平
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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