METHOD OF MAKING PARTIALLY WELDED SPOTS IN WIRE-CUT ELECTRICAL DISCHARGE MACHINING
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
In a method of welding a cut-out part with a workpiece at a preselected area in a thickness direction of the workpiece in a wire electrical discharge machining to retain temporarily or tentatively the part on the workpiece, a wire electrode 5 tilted in posture cuts the workpiece 6 to form a slant cutting surface 30 at a spark discharge location in a desired contour 21 in the workpiece 6. The wire electrode 5 after kept in an upright posture executes the welding process on the workpiece 6 along the slant cutting surface. A plurality of the welded spots is formed over a preselected length at preselected areas in the thickness direction of the workpiece 6. Even if the cut-out part 26 weighs more or the spark discharge is executed on the workpiece 6 overlapped one on the other, the welding spot 20 is formed in the thickness direction of the workpiece 6 adequately depending on the working situation to tentatively retain the cut-out part 26 on the workpiece 6.
36 Citations
10 Claims
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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.
Specification