An ultrasound and magnetic field-assisted wire cut electrical discharge machining method and device

Abstract

The invention provides an ultrasound and magnetic field-assisted wire cut electrical discharge machining method. A magnetic field is utilized to make electrons in a discharge channel generated between an electrode wire and a workpiece perform curvilinear motion, so that the radius of the discharge channel is increased and the smoothness of the surface of the machined workpiece is improved; ultrasound waves are adopted to make corrosion removing particles generated by wire cut electrical discharge machining perform horizontal reciprocating vibration and be discharged by the action of ultrasound vibration, so that the machining speed is increased. The invention also provides an ultrasound and magnetic field-assisted wire cut electrical discharge machining device comprising a workbench, an electrode wire device, a pulse power source, an ultrasound generator and a magnetic field device, wherein the electrode wire device has a wire storage drum, a plurality of guide rollers and a guide device; the negative electrode of the pulse power source is connected to the electrode wire via a conductive block and the positive electrode is connected to a workpiece; the ultrasound generator comprises an ultrasound generating unit, an ultrasound transducer, an amplitude-change pole and a tool rod; the magnetic field device comprises two permanent magnets installed on the two sides of the workpiece symmetrically and used for providing a magnetic field.

Description

technical field [0001] The invention belongs to the field of precision composite processing, and in particular relates to an ultrasonic magnetic field-assisted wire electric discharge processing method and device. Background technique [0002] With the development of science and technology, miniaturization and precision have become the development trend in many fields such as aerospace and biomedical equipment, and mechanical parts are developing in the direction of complexity, diversification and miniaturization. TiNi-01 shape memory alloy has high ductility and high thermal recovery, and has been widely used in medical devices. [0003] Due to the characteristics of the material itself, the macroscopic cutting force generated by traditional cutting has a relatively large impact on the machining accuracy of the material, and special processing is required to ensure the high machining accuracy of the material. At present, special processing methods mainly include wire elect...

AI Technical Summary

Problems solved by technology

The thickness of the workpiece processed by wire electric discharge cutting usually does not exceed 20mm. When the thickness of the workpiece increases, the stability of the processing will drop significantly, and broken wires and short circuits will occur frequently, seriously affecting the processing accuracy and processing efficiency.

In addition, re-threading and starting up in the middle of the process will cause burns on the surface of the workpiece and affect the integrity of the processing process

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