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Device and method for laser-induced plasma-assisted electric discharge composite machining under the action of magnetic field

A plasma and laser-induced technology, applied in the direction of electric processing equipment, accessory devices, metal processing equipment, etc., can solve the problems of difficult processing, low conductivity, difficult to achieve cross-scale processing, and insufficient processing surface quality

Active Publication Date: 2020-07-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a device and method for ultrashort pulse laser-induced plasma-assisted EDM under the action of a magnetic field. The purpose of the device and method is to combine laser-induced plasma processing with The unit, the EDM unit and the compound magnetic field unit are organically combined to solve the problems in the EDM technology that it is difficult to process low-conductivity materials, it is difficult to achieve cross-scale processing, and the quality of the processed surface is not high enough. It has a very broad application prospect

Method used

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  • Device and method for laser-induced plasma-assisted electric discharge composite machining under the action of magnetic field
  • Device and method for laser-induced plasma-assisted electric discharge composite machining under the action of magnetic field
  • Device and method for laser-induced plasma-assisted electric discharge composite machining under the action of magnetic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Processing environment: The EDM machine tool is AgieCharmilles’ FORM E350 high-performance EDM machine tool. The metal workpiece to be processed is titanium alloy Ti6Al4V, a difficult-to-machine material with a thickness of 10 mm; a cylindrical hole with a diameter of 20 μm and a depth of 10 μm is processed .

[0067] The pulse current pulse width provided by the EDM machine tool is 30μs, the pulse interval is 20μs, and the current is 6A. The current accuracy of the DC excitation power supply (connected to the electromagnet) is 10mA, and it can provide a current of 0-8A and a voltage of 0-10V. The direct current, the output power is 300W. It also includes ultrashort pulse lasers, optical path conversion components, five-degree-of-freedom precision platforms, and multiple pairs of electromagnets. The wavelength of the laser beam is 532nm, the frequency is 10KHz, the pulse width is 10ps, and the pulse energy is 3μJ. It is cooled by water cooling. The center of the chuck...

Embodiment 2

[0070] Processing environment: The EDM machine tool is AgieCharmilles' FORM E350 high-performance EDM machine tool. The metal workpiece to be processed is a difficult-to-machine material with a thickness of 5mm, which is 65% aluminum-based silicon carbide (low conductivity material). A cylindrical hole with a diameter of 0.5mm.

[0071] The pulse current pulse width provided by the machine tool is 40μs, the pulse interval is 30μs, and the current is 8A. The current accuracy of the DC excitation power supply of the auxiliary device used is 10mA, which can provide a current of 0-8A and a voltage of 0-10V. It is 300W; it also includes ultra-short pulse laser, electromagnet group, optical path conversion component, five-degree-of-freedom precision platform, electromagnet wire package spacing 80mm, electromagnet pole head diameter 12mm, two pole spacing adjustable within 80mm, the maximum can generate 1T magnetic field; the magnetic induction intensity of the generated magnetic fie...

Embodiment 3

[0074] Processing environment: The EDM machine tool is AgieCharmilles' FORM E350 high-performance EDM machine tool. The metal workpiece to be processed is nickel alloy, a difficult-to-machine material with a thickness of 10mm; a cylindrical hole with a diameter of 2mm is processed.

[0075] The pulse current pulse width provided by the machine tool is 50μs, the pulse interval is 40μs, and the current is 10A. The current accuracy of the DC excitation power supply of the auxiliary device used is 10mA, which can provide a current of 0-8A and a voltage of 0-10V. It is 300W; it also includes an ultra-short pulse laser, an optical path conversion component, an electromagnet group, and a five-degree-of-freedom precision platform. The wavelength of the laser beam is 532nm, the frequency is 10KHz, the pulse width is 10ps, and the pulse energy is 6μJ. Cooling, the optical path conversion component guides the laser beam from the ultrashort pulse laser into the machine tool, the laser beam...

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Abstract

The invention discloses an ultrashort pulse laser induced plasma assisted electric spark compound processing device and an ultrashort pulse laser induced plasma assisted electric spark compound processing method under action of a magnetic field and belongs to the field of laser processing and electric spark compound processing of special processing. The device compounds a laser induced plasma processing unit, an electric spark processing unit and a compound magnetic field unit together organically. The laser induced plasma processing unit comprises an ultrashort pulse laser, a laser power supply, a water cooler and a light path conversion assembly. The compound magnetic field comprises a direct current excitation power supply and an annular electromagnet. The electric spark processing unitcomprises a five-degree-of-freedom precision platform for controlling a workpiece to move expectedly. The device and the method provided by the invention sole the problem that it is hard to process alow conductivity material and achieve cross-dimension processing and the processed surface is not enough high in quality in the electric spark processing technology, and have a very wide applicationprospect.

Description

technical field [0001] The invention belongs to the fields of laser processing and composite electric discharge processing for special processing, and more specifically relates to a device and method for ultrashort pulse laser-induced plasma-assisted composite electric discharge processing under the action of a magnetic field. Background technique [0002] With the development of modern industry, the demand for small-scale products in many industrial sectors is increasing, and there are more stringent requirements for the dimensional accuracy and surface roughness of the products. Compared with traditional processing methods, special processing is through non-mechanical contact. Instead of generating macroscopic chip force, materials are removed through non-mechanical energy (electricity, magnetism, light, heat, and chemistry), which can more easily meet processing needs and meet the sustainable development concept of energy saving and environmental protection. [0003] EDM ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H5/00B23H11/00
CPCB23H5/00B23H11/00
Inventor 张臻张国军吴杰于海深张艳明
Owner HUAZHONG UNIV OF SCI & TECH
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