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Asymmetric cutting method for electrospark wire-electrode cutting

A cutting method and wire electric discharge technology, applied in the field of wire electric discharge machine tools, can solve problems such as the influence of cutting speed, achieve the effect of improving efficiency and speed, and smooth slag discharge

Inactive Publication Date: 2010-06-09
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The width and interval of the electric pulse of the existing WEDM machine tool are set to be the same in different wire walking directions. For thick workpieces, in order to smoothly discharge slag when the wire walking direction is not conducive to slag discharge, the electric pulse should be set Larger pulse interval, and the pulse interval is too large for the direction of wire travel that is conducive to slag discharge, so the overall cutting speed is affected

Method used

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  • Asymmetric cutting method for electrospark wire-electrode cutting
  • Asymmetric cutting method for electrospark wire-electrode cutting
  • Asymmetric cutting method for electrospark wire-electrode cutting

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Experimental program
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Effect test

Embodiment 1

[0034] When using the DK7750 wire electric discharge machine tool, the molybdenum wire diameter is 0.15mm, and the cutting thickness is 480mm No. 45 steel workpiece, in the direction of the wire that is conducive to slag discharge, the ratio of the discharge pulse width to the pulse gap is set to 1:8; adjust so that The average current of the molybdenum wire does not exceed 5A, and the cutting feed is kept moving forward for processing. In the direction of wire travel that is not conducive to slag discharge, set the ratio of discharge pulse width to pulse gap to 1:16; adjust so that the cutting feed is advancing, and the average current of molybdenum wire is processed between 1 and 3A.

Embodiment 2

[0036]When using the DK7750 wire electric discharge machine tool, the molybdenum wire diameter is 0.15mm, and the thickness is 250mm when cutting No. 45 steel workpieces, the ratio of the discharge pulse width to the pulse gap is set to be 1:7 in the direction of wire travel that is conducive to slag discharge; adjust so that The average current of the molybdenum wire does not exceed 5A, and the cutting feed is kept moving forward for processing. In the direction of wire travel that is not conducive to slag discharge, set the ratio of discharge pulse width to pulse gap to 1:13; adjust so that the cutting feed is advancing, and the average current of molybdenum wire is processed between 1 and 3A.

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Abstract

The invention discloses an asymmetrical cutting method used in the electrical discharge wire-cutting. The method is characterized by performing the wire-cutting by adopting the bidirectional wire winding and power pulse discharging, discharging the slag during the intervals of the power pulse, changing the discharge pulse parameters of the power supply in two different wire winding directions andgenerating different pulse widths and pulse gaps to perform the processing. By generating the discharge pulse with different parameters at different wire winding directions, the asymmetrical cutting method is favorable for discharging the slag smoothly and is suitable for the fast cutting of work pieces with different thicknesses and improves the efficiency and speed of the electrical discharge wire-cutting with fast wire winding.

Description

technical field [0001] The invention relates to a wire electric discharge machine tool widely used in industrial manufacturing, in particular to an asymmetrical cutting method of the wire electric discharge machine tool, which can process molds, special-shaped precision parts and the like. Background technique [0002] Wire EDM machine tools are divided into fast wire, medium wire and slow wire machine tools. The fast-feeding WEDM machine adopts a two-way wire-feeding mechanism. The molybdenum wire is wound on the wire drum and cuts with reciprocating motion. The workpiece is cut with electric pulses. The slag discharge is mainly carried out during the power pulse interval. It is beneficial to slag discharge, and it is not conducive to slag discharge when the wire running direction is from bottom to top. The width and interval of the electric pulse of the existing WEDM machine tool are set to be the same in different wire walking directions. For thick workpieces, in order t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H7/02B23H7/04
Inventor 姜文刚李建华蔡蓝图
Owner JIANGSU UNIV OF SCI & TECH