Vibrating Electrodes Or Workpiece Patents (Class 219/69.2)
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Publication number: 20020125217Abstract: A small hole electric discharge machine for forming a small hole in a workpiece by generating electric discharge between a rotating elongate pipe electrode (49) having a diameter of 1.0 mm or less and the workpiece. The small hole electric discharge machine comprises a column (11), a W-axis slider (21, 23) attached to the column so as to be moveable in the direction of a vertical W-axis, a Z-axis slider (31) attached to the W-axis slider so as to be moveable in the direction of a vertical Z-axis, a machine head (40) attached to the Z-axis slider the pipe electrode being attached to the machine head, a linear motor (90) for moving the Z-axis slider, and a gas spring (50) for generating a balance force to counteract the gravitational force acting on the Z-axis slider.Type: ApplicationFiled: February 4, 2002Publication date: September 12, 2002Inventors: Kazuo Kato, Yoshihiro Kurosaka, Yuzo Dohi
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Publication number: 20020113042Abstract: In a micro electro discharge machining method and apparatus, the shapes of minute holes are transferred to a tool electrode through a plate electrode serving as an intermediate electrode, and a workpiece is machined using the tool electrode. As a result, the time for machining is reduced. During the electro discharge machining process, the relative distance between the tool electrode and the plate electrode or the workpiece is changed at a prescribed frequency and discharge pulse output is controlled in synchronization with the change in the relative distance between the tool electrode and the plate electrode or the workpiece, so that high precision machining is enabled.Type: ApplicationFiled: February 15, 2002Publication date: August 22, 2002Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTDInventors: Takeshi Masaki, Toshihiko Wada
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Patent number: 6410877Abstract: A method of rough shaping a prosthetic joint component that includes a generally spherical polycrystalline diamond compact by electric discharge machining is disclosed. The discharge machining electrode roughens a polycrystalline diamond compact sphere while the electrode and the sphere are rotating about different axes. By controlling the amount of discharge current, the depth and amount of the heat affected zone can be minimized. In the case of a polycrystalline diamond compact, the heat affected zone can be kept to about 3 to 5 microns in depth and is easily removable by grinding and polishing.Type: GrantFiled: January 30, 2000Date of Patent: June 25, 2002Assignee: Diamicron, Inc.Inventors: Richard H. Dixon, Louis M. Pope
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Patent number: 6373018Abstract: An apparatus for electrical discharge machining multiple holes in an electrically conductive work piece, includes an electrical discharge machine for rotatably mounting a first electrode, and at least one electrical discharge unit for rotatably mounting at least one second electrode. The electrical discharge machine includes a driver and a controller, the driver is desirably coupled to the electrical discharge machine and the electrical discharge unit for rotating the first electrode and the at least one second electrode, and the controller is desirably coupled to the electrical discharge machine and the at least one electrical discharge unit for controlling a supply of electrical energy from the first electrode and second electrode to the workpiece.Type: GrantFiled: February 7, 2000Date of Patent: April 16, 2002Assignee: General Electric CompanyInventors: Bin Wei, Martin Kin-Fei Lee
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Patent number: 6369343Abstract: An electrical discharge machining (EDM) apparatus includes a single workpiece fixture for holding a workpiece and a plurality of machining heads for machining different features into the workpiece. For example, a first machining head is arranged to machine a first feature into the workpiece, and a second machining head is arranged to machine a second feature into the workpiece. Each machining head is connected to a separate control system so as to operate independently.Type: GrantFiled: September 20, 2000Date of Patent: April 9, 2002Assignee: General Electric CompanyInventors: Rudi Oskar Krenz, Brett Wayne Byrnes, Willem Thomas DeGraaff
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Patent number: 6353199Abstract: An electric discharge machining apparatus comprises a quill 8 movable in the vertical direction, at least one set of linear motor movers attached to the quill, symmetrically about a center axis of the quill, and a single set of linear motor stators facing the set of movers. An electrode mounting device (9) for holding a tool electrode (6) is attached to a lower end of the quill, coaxially with the quill. Preferably, the set of movers includes magnetic plates (12, 14) attached to the quill and a row of permanent magnets (11, 13, 15, 16) arranged on the magnetic plates, and the set of stators includes a yoke (31, 41) and a coil (32, 42) wound around the yoke. The quill has a hole (8a) in its center extending in the vertical direction, and an air cylinder (61) providing counter balance for the load of the quill is preferably disposed in this hole.Type: GrantFiled: July 14, 2000Date of Patent: March 5, 2002Assignees: Sodick Co., Ltd., KHS Co., Ltd.Inventors: Akio Hosaka, Sadao Sano, Yoichi Seki
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Patent number: 6348668Abstract: A method having the steps of: securing a first electrode (120) to an indexing unit (121) which indexes the angle of the first electrode; modifying the first electrode (120) into a predetermined shape by a discharging operation of a second electrode (131) or a machining operation of a second tool connected and secured to a main shaft (112) which is moved in a vertical direction when the surface of the first electrode (120) is modified; changing the second electrode (131) or the second tool connected and secured to the main shaft (112) to a first tool (110) by an automatic tool changing unit; indexing the first electrode (120) to a predetermined angle of rotation by the indexing unit (121); causing discharge to occur while relatively moving the tip of the first tool (110) along the surface of the first electrode (120) such that the tip is made to be opposite to the surface of the first electrode (120) while a predetermined distance is being maintained; and forming a hard coating film on the tip of the first tooType: GrantFiled: January 10, 2000Date of Patent: February 19, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshio Moro, Akihiro Goto
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Patent number: 6339203Abstract: The main spindle (1A) for the main spindle device of a diesinker electric discharge machine is connected to a high rotor inertia, high output servo motor (15) without passing through a speed reducer; the servo motor (15) is equipped with a high resolution encoder (14). A main spindle rotation speed detection signal is detected by the encoder (14) when the main spindle (1A) is rotating in the high speed mode, and a main spindle angle position and rotation speed detection signal are detected when the main spindle (1A) is being angle divided, and these signals are fed back to the servo motor (15) motor driver (16). High speed rotational control and angle position precision angle division control are accomplished by a single servo motor and a single encoder.Type: GrantFiled: June 26, 2000Date of Patent: January 15, 2002Assignee: Sodick Co., Ltd.Inventors: Takahiro Nakamura, Kenji Yamada
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Patent number: 6329624Abstract: The machine includes a saddle (26) which is displaceable along a spindle axis (E) and transversely thereof under numerical control. A tool spindle (28) is supported on the saddle (26) so as to be driven in rotation about the spindle axis (E) and adapted to be equipped with a disc-shaped tool for cutting work to be done on a workpiece (10). The machine further includes a workpiece slide (42) which is displaceable along the workpiece slide guide (40) under numerical control and carries a workpiece support (44). The tool (30) is embodied by an electrically conductive member of an electric circuit (30, 36, 46, 48, 10) which is closed through the workpiece (10) when this is touched by the tool (30). The tool spindle (28) is adapted to be driven by a motor (84) which can be switched from a rotational operating speed to do cutting work on the workpiece (10) to a rotational measuring speed which is considerably slower.Type: GrantFiled: March 10, 2000Date of Patent: December 11, 2001Assignee: Vollmer Werke Maschinenfabrik GmbHInventors: Peter Lenard, Norbert Bailer, Rudi Schmucker
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Patent number: 6326579Abstract: An electric discharge machine includes a machine base configured to support a work piece, a y-axis alignment assembly having a first direction of travel and mounted to the machine base, and an electrode alignment assembly mounted to the machine base and configured to hold an electrode during a machining process. The electrode alignment assembly has a second, a third, and a fourth direction of travel, and an attached rotary indexer has a fifth direction of travel. Movements in the first, second, third, fourth, and fifth directions of travel are automatically controlled by a processor.Type: GrantFiled: August 5, 1999Date of Patent: December 4, 2001Assignee: General Electric CompanyInventors: David M. Krawczyk, Charles L. Ball
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Patent number: 6310313Abstract: Separately from an electrode jumping operation (an amount of rise of a first electrode jump (22)) aimed at discharging machining debris produced during electrical discharge machining, an electrode jumping operation (an amount of rise of a second electrode jump (23)) is inserted for which is set an amount of rise of jump with which balls or rollers used on a sliding portion of a mechanically driving part undergo one revolution or more. Further, in a case where an abnormality of a lubricant supplying unit (101) is detected, as for a program being continued, machining is stopped after the termination of the program, or machining is stopped after continuing the program within a fixed time duration, or a program other than for machining operation is made executable.Type: GrantFiled: June 12, 2000Date of Patent: October 30, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Mitsuaki Akune, Hajime Ogawa, Takashi Kanaya
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Patent number: 6265686Abstract: A discharge processing machine includes a base, a work platform, a machine head seat, a fixation seat, and a main shaft seat. The work platform is slidably mounted on the base. The machine head seat is mounted on one side of the base and is provided with a fixation arm, which is fastened at one end thereof with the fixation seat. The main shaft seat is slidably mounted on the fixation seat such that the main shaft seat slides along the direction of the normal line of the work platform. The fixation seat has a threaded hole, whereas the main shaft seat has a threaded rod which is driven by a servomotor to engage with various depths of the threaded hole of the fixation seat, so as to actuate the main shaft seat to displace along the direction of the normal line of the work platform.Type: GrantFiled: November 24, 1999Date of Patent: July 24, 2001Inventor: Ton-Shih Lai
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Patent number: 6225589Abstract: In a three dimensional generic electric discharge machining (EDM) apparatus the positionable driver assembly (4) houses a discharge electrode (1) that is in the form of a continuous wire, exposing only a predetermined length, the working portion, of that wire for discharge machining. Additional portions of that wire are incrementally advanced (5) from the housing as needed. In one embodiment, that need arises from electrode erosion, and, as an incremental portion of the electrode's working portion is eroded away, an additional increment of wire is advanced from the housing to restore the working portion to the desired length.Type: GrantFiled: March 15, 1999Date of Patent: May 1, 2001Inventor: Stephen Bartok
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Patent number: 6211482Abstract: A method of repairing a substrate includes the step of excavating a well in the substrate with an electrical discharge machining operation. A wire is then delivered to the well. Simultaneously, laser energy is routed to the well such that the laser energy intersects with the wire to produce a reconstruction weld in the well. A tool delivery system with an electrical discharge machining tool head and a reconstruction welding tool head is used to perform the excavation and welding operations.Type: GrantFiled: October 24, 1997Date of Patent: April 3, 2001Assignee: Electric Power Research Institute, Inc.Inventors: Shane J. Findlan, Gregory J. Frederick, Artie G. Peterson, Jr., J. Darryl Baucom
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Patent number: 6184486Abstract: Electrode tools for electroerosion (EDM) where a cavity or a relief is machined by hollowing out the part at great speed and in successive layers or slices by means of a rotating electrode tool of a simple shape which is independent of the cavity to be eroded, called “EDM slices milling”.Type: GrantFiled: November 3, 1997Date of Patent: February 6, 2001Assignee: Charmilles Technologies S.A.Inventors: Jean-Claude Diot, Willi Zaugg, GĂ©rald Naville, Jean-Paul Briffod