Turning – Process of turning
Reexamination Certificate
2000-04-19
2001-10-09
Tsai, Henry (Department: 3722)
Turning
Process of turning
C082S047000, C082S113000, C082S131000
Reexamination Certificate
active
06298757
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of Invention
The present invention relates to a system for presetting the cutting tools of a shaft.
2. Description of the Related Art
In the art of pipe cut-off machines, wherein the cutting is performed without chip removal, the cutting wheel and a calendar roll opposite thereto must be set at a desired initial spacing for machining, whenever the pipe or shaft diameter changes. In a prior art known cut-off machine, the adjustment or setting must be performed while the cassette is secured to the machine and the machine is shut down. The setting is a comparatively labor intensive and tedious process and the site of a setting procedure within the machine is not readily accessible.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved system and method, whereby the tools in a quick-change cutting tool cassette can be preset outside a machine while, at the same time, the cut-off machine may have another cutting tool cassette mounted thereon, such that the cut-off machine can be in operation while the presetting of the cutting tools of another cassette is in progress.
This object is achieved by the presently claimed invention, wherein a system for presetting the cutting tools of a cut-off machine for a pipe or shaft comprises:
a cutting tool cassette provided with coupling and aligning means for securing the cassette to a rotatable cutting head, having a center axis of rotation (I) which coincides with the center axis of a pipe or a shaft to be cut;
at least one sharp-edged cutting wheel, which functions as a non-chipping cutter;
a cutting wheel clamp, to which the cutting wheel is rotatably journal and which clamp is guided along maneuvering tracks for the cassette to travel (an arrow II) away from said center axis (I) in response to a centrifugal force and spring-back factor as the cutting head, along with the cassette mounted thereon, are rotating;
an adjusting device associated with the clamp for setting the operating range of the cutting wheel to comply with the diameter of a pipe or shaft to be cut by adjusting a radial distance (III) of the adjusting device from the cutting wheel clamp, the adjusting device being provided with a bevelled guide surface which forms an acute angle with said center axis (I); and
a power unit associated with the cutting head, which comes to contact with said bevelled guide surface of the adjusting device and carries the cutting wheel, along with its clamp, toward said center axis (I) in opposition to said centrifugal force and springback factor until the cutting wheel arrives at a radial distance from said center axis (I) as set by the adjusting device.
The invention relates also to a method for carrying out said presetting.
REFERENCES:
patent: 3662633 (1972-05-01), Bourgeois
patent: 4126064 (1978-11-01), Tarrant
patent: 4302958 (1981-12-01), Andriessen et al.
patent: 4665782 (1987-05-01), Vander Pol
patent: 5014579 (1991-05-01), Galonska
patent: 5894771 (1999-04-01), Braun et al.
Klauber & Jackson
T-Drill Oy
Tsai Henry
LandOfFree
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