METHOD OF AUTOMATICALLY CONNECTING WIRE ELECTRODE IN WIRE CUT ELECTROSPARK MACHINING APPARATUS

摘要

PURPOSE:To enable a wire electrode to be automatically connected securely and easily by inserting the wire electrode into an elastically expansible opening in a wire guide jig inserted in a working start hole in a workpiece, transferring the jig to make the wire electrode extend through the start hole and then removing the jig. CONSTITUTION:A wire guide jig 9 is provided with an opening 9' consisting of opening pieces 9', 9''... slitted like a cross longitudinally of a pipe from one end and flared. The jig 9 is previously disposed movably in a working start hole 3 in a workpiece 1 which is displaced to align the center of said hole 3 with the electrode insertion position Xa in which a chuck 14 is installed. The jig 9 is held by the chuck 14, while delivery rollers 10 and the upper guide 11 are moved to the position Xa. And an electrode wire 4 is sent out to be securely introduced into the opening 9' even if the end of the wire is somewhat bent, and the chuck 14 is moved in the delivery direction so that the electrode 4 is taken up by a take-up roller.