Electric heating – Metal heating – Cutting or disintegrating
Patent
1995-05-11
1998-04-14
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6917, 219 692, B23H 110, B23H 914
Patent
active
057394970
ABSTRACT:
The technical field of the invention generally concerns electroerosively drilling small diameter holes, e.g. holes 6.0 mm in diameter and smaller. Such a small hole drilling apparatus includes a worktable for receiving a workpiece, together with a chuck and an electrode guide which receives and retains an elongated and thin tubular electrode. The drilling apparatus also includes a fluid supply and pump which delivers a first flow of machining fluid to an inner bore of the tubular electrode at a pressure of at least 20 kg/cm.sup.2. The drilling apparatus also includes a power supply for applying a series of electrical machining pulses between the tubular electrode and the workpiece. As material is removed from the workpiece, an electrode feed mechanism included in the drilling apparatus advances the tubular electrode into the workpiece to maintain the spacing between the tubular electrode and the workpiece. The improved drilling apparatus includes a secondary machining fluid control and a flushing nozzle which directs a second flow of the machining fluid along the outer surface of the tubular electrode toward the machining gap. As the tubular electrode pierces through the workpiece, the second flow of machining fluid keeps the space between the electrode's outer surface and the workpiece including the machining gap filled with machining fluid.
REFERENCES:
patent: 3468784 (1969-09-01), Joyce et al.
patent: 3847781 (1974-11-01), Bellows
patent: 4393292 (1983-07-01), Inoue
patent: 4538048 (1985-08-01), Alexander
patent: 4705932 (1987-11-01), Aso et al.
patent: 4990737 (1991-02-01), Obara
patent: 5004530 (1991-04-01), Tanaka
patent: 5019683 (1991-05-01), Abdukarimov et al.
patent: 5128505 (1992-07-01), Matter
patent: 5245152 (1993-09-01), McCall
patent: 5281788 (1994-01-01), Abiko et al.
Evans Geoffrey S.
Schreiber Donald E.
LandOfFree
Method of and apparatus for increasing the productivity of an el does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of and apparatus for increasing the productivity of an el, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and apparatus for increasing the productivity of an el will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-637121