Method of and apparatus for cutting narrow grooves

Details Method of and apparatus for cutting narrow grooves Method of and apparatus for cutting narrow grooves

B - Operations, Transporting

26

D

164/31

B26D 1/00 (2006.01) B23H 9/14 (2006.01)

Patent

CA 1145241

Abstract of the Disclosure An electrochemical machining method uses a rotatable electrode disk to cut narrow groove in a workpiece. An electric current of relatively low density is established between major sides of the electrode disk and side surfaces of the groove to prevent electrolytic erosion of the groove. In practicing the method, a thin flexible electrode disk is rotated relative to the workpiece. An electrical potential and a flow electrolyte are established between the rotating electrode disk and the workpiece. The electrode disk is then moved into close proximity with the workpiece to initiate formation of the groove. Continued formation of the groove results in the disk entering the groove so that a flow of electrical current is established between side surfaces of the groove and major sides of the rotating electrode disk. The density of the electrical current between the major sides of the electrode disk and the side surfaces of the groove tends to be minimized by providing openings in the major sides of the electrode disk. These openings reduce the side area of the electrode disk which is available for current flow.

391884

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