Turning – Lathe – Multiple
Reexamination Certificate
1999-10-13
2001-01-16
Tsai, Henry W. H. (Department: 3722)
Turning
Lathe
Multiple
C082S137000, C082S142000, C082S154000, C082S165000
Reexamination Certificate
active
06173630
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a working machine, and more particularly to a computer numeric control (abbreviated as CNC hereinafter) working machine that can be used for machining both ends and the mediate portion of a workpiece.
2. Description of the Related Prior Art
A conventional CNC working machine comprises a chuck for securing one end of a workpiece, and a rotatable cutter blade for machining the other end of the workpiece. However, the conventional CNC working machine cannot be used for machining both ends of the workpiece simultaneously.
The closet prior arts of a working machine are disclosed in U.S. Pat. No. 5,758,554 to Miyano, entitled “MACHINE TOOL AND METHOD FOR MACHINING A LONG-SHAFTED WORKPIECE”, and U.S. Pat. No. 5,842,393 to Nagel, entitled “MACHINE TOOL”. In the Miyano prior art, it has to use a clamping device in conjunction with two sets of cutter devices so as to machine both ends of the workpiece. In the Nagel prior art, it has to use three sets of clamping devices in conjunction with two sets of cutter devices so that it is necessary to detach the workpiece from the clamping device to machine both ends of the workpiece.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a working machine for machining a workpiece comprising a base including a first track and a second track mounted therein and arranged in parallel with each other; at least one clamping device slidably mounted in the first track and including a chuck for clamping the workpiece therein; and at least one cutter device slidably mounted in the second track to mate with the at least one clamping device for machining the workpiece, wherein, the at least one cutter device is movable relative to the at least one clamping device to machine the two ends of the workpiece.
The at least one cutter device includes a seat slidably mounted in the second track, a slide slidably mounted on the seat to move therewith and slidable along a direction perpendicular to that of the second track, and a cutter element secured to the slide to move therewith so that the cutter element is slidable along the second track and is slidable along a direction perpendicular to that of the second track.
The working machine further comprises at least one positioning device slidably mounted in the first track and including a centering member detachably abutting one end of the workpiece for positioning the one end of the workpiece.
According to the embodiment of the present invention, the working machine comprises a first clamping device mating with a first cutter device, and a second clamping device mating with a second cutter device. The working machine also comprises a first positioning device mating with the first clamping device, and a second positioning device mating with the second clamping device.
The working machine further comprises a first motor mounted on the base for moving the at least one clamping device and for moving the at least one positioning device, a second motor mounted on the base for rotating the chuck of the at least one clamping device, and at least one servo motor mounted on the base and including a slidable threaded rod for moving the at least one cutter device.
Further objectives and advantages of the present invention will become apparent after a complete reading of the detailed description with reference to the accompanying drawings.
REFERENCES:
patent: 5152201 (1992-10-01), Izawa
patent: 5758554 (1998-06-01), Miyano
patent: 5787560 (1998-08-01), Schalles
patent: 5815902 (1998-10-01), Osterried et al.
patent: 5904082 (1999-05-01), Link et al.
patent: 0186501 (1983-10-01), None
patent: 403117501 (1991-05-01), None
patent: 406134603 (1994-05-01), None
Baxley Charles E.
Tsai Henry W. H.
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