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METHOD OF MAKING PARTIALLY WELDED SPOTS IN WIRE-CUT ELECTRICAL DISCHARGE MACHINING

  • US 20140374385A1
  • Filed: 05/22/2013
  • Published: 12/25/2014
  • Est. Priority Date: 06/13/2012
  • Status: Active Grant
First Claim
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1. A method of welding a cut-out part with a workpiece in wire electrode discharge machining, comprising of the steps of cutting a part to be separated from the workpiece with electrical discharge using spark energy generated by application of an inter-electrode voltage which occurs across a wire electrode and the workpiece lying in opposition to the wire electrode and, in doing so, changing an electrical processing condition applied across the wire electrode and the workpiece from a cutting phase to a welding phase at a preselected spot in a cutting path or kerf of the part, fusing at least partially the wire electrode and welding the part with the workpiece at the spot in a preselected contour of the part to retain the part on the workpiece,and further comprising of the steps of changing the electrical processing condition to the cutting phase at a preselected spot to weld the part with the workpiece, thereby carrying out the discharge machining to rough cut the workpiece in a thickness direction of the workpiece along a cutting contour in the workpiece to form a rough cut surface on the part, and then tilting the wire electrode in posture with respect to the rough cut surface lying in the thickness direction of the workpiece, subsequently changing the electrical processing condition to the welding phase to execute a welding process on the workpiece along the rough cut surface thereby forming the welded spot to weld the part with the workpiece along the rough cut surface at an ingress side of the workpiece for the wire electrode, the welded spot extending over a preselected length at a preselected area in the thickness direction of the workpiece to retain the part on the workpiece with the welded spot.

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