Electric heating – Metal heating – Cutting or disintegrating
Reexamination Certificate
2005-09-20
2005-09-20
Evans, Geoffrey S. (Department: 1725)
Electric heating
Metal heating
Cutting or disintegrating
C219S069170, C219S069180
Reexamination Certificate
active
06946615
ABSTRACT:
An electric discharge machine for machining a workpiece (2a) made of insulating material or other materials comprises: a first comparison member (17) for comparing voltage (V) between the electrodes of the electrode (1) and the workpiece (2a) with the first reference voltage (V1) which is set at a value close to electric power source voltage (V0) not higher than electric power source voltage (V0); a second comparison member (18) for comparing voltage (V) between the electrodes with the second reference voltage (V2) which is set at a value lower than the first reference voltage (V1); and a control member (19) for setting a short electric discharge pulse width (TP1) in the case where voltage (V) between the electrodes is lower than the second reference voltage (V2) according to the result of comparison conducted by the second comparison member (18) at a point of time when a predetermined period of time (T0) has passed from the time when voltage (V) between the electrodes becomes lower than the first reference voltage (V1) according to the result of comparison conducted by the first comparison member (17), and for setting a long electric discharge pulse width (TP2) in the case where the voltage between the electrodes is higher than the second reference voltage (V2). This electric discharge machine is capable of stabilizing the machining of the workpiece (2a) made of insulating material or other materials and also capable of enhancing quality of a machined face.
REFERENCES:
patent: 5434380 (1995-07-01), Magara et al.
patent: 6501232 (2002-12-01), Goto et al.
patent: 62-218024 (1987-09-01), None
patent: 7-136849 (1995-05-01), None
patent: 8-1437 (1996-01-01), None
patent: 8-108318 (1996-04-01), None
patent: 8-229740 (1996-09-01), None
patent: 9-253935 (1997-09-01), None
patent: WO99/58743 (1999-11-01), None
Fukuzawa Yasushi
Goto Akihiro
Magara Takuji
Mohri Naotake
Evans Geoffrey S.
Mohri Naokate
LandOfFree
Method and system for electric discharge machining... 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 and system for electric discharge machining..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for electric discharge machining... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3414014