H - Electricity – 02 – H
Patent
H - Electricity
02
H
327/34
H02H 1/00 (2006.01) B23H 7/10 (2006.01) B23H 9/00 (2006.01) B28B 3/20 (2006.01)
Patent
CA 1191556
ABSTRACT OF THE DISCLOSURE Method and apparatus are set forth for forming a substantially enclosed longitudinal path along the cutting surface of a workpiece and substantially enclosing a cutting wire of electrical discharge machining equipment so as to confine and direct dielectric fluid supplied thereto along such cutting wire to flush out eroded particles formed during the cutting of a slot in the surface of the workpiece. Furthermore, a method of improving the cutting rate and depth of cut of multiple slots produced within a workpiece is disclosed which includes the formation of initial counter slots in the surface of the workpiece having a width sub- stantially larger than the width of the desired functional slots to be formed in said workpiece. The invention is of particular interest in the formation of long thin slots of accurate configuration such as in ceramic honeycomb structures which require accurately parallel sidewalls which must be burr-free and have consistent surface finish. In particular, it achieves good repeatability by providing consistently identical channels or slots in work pieces.
404305
Cunningham George M.
Majestic Peter J.
Corning Glass Works
Gowling Lafleur Henderson Llp
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