Cutting by use of rotating axially moving tool – Processes – Bit detachable
Reexamination Certificate
1999-07-09
2001-09-11
Wellington, A. L. (Department: 3722)
Cutting by use of rotating axially moving tool
Processes
Bit detachable
C408S002000, C408S054000, C408S083000, C408S708000
Reexamination Certificate
active
06287057
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a device comprised of at least one guide bearing and a tool with a base member having cutting blades for machining bores in a workpiece whereby the bores are coaxially arranged relative to one another. The invention further relates to a method for machining bores in a workpiece by employing the aforementioned device, wherein the tool is axially inserted into the bores and, subsequently, the bores are machined by the cutting blades of the rotating tool.
It is known to machine with tools by cutting multiple bores that are arranged axially spaced in a row behind one another by. Since the bores generally have the same diameter and are arranged coaxially to one another and the cutting blades are fixedly adjusted, the insertion of the tool into the bores is complicated and difficult.
It is an object of the present invention to embody the aforementioned device and the aforementioned method such that the tool for machining of the bores is constructively simple and can be inserted easily into the workpiece whereby the bores are cut by a pulling cut to prevent return traces whereby the workpiece and the guide bearing are in a fixed spacial arrangement relative to one another during machining.
SUMMARY OF THE INVENTION
This object is inventively solved for the device in that the tool and the guide bearing are shaped such that during machining guiding as well as centering is possible and that also a simple, offset insertion into and removal from the workpiece bores and the guide bearing is possible, whereby the axis of the bore and the axis of the guide bearing remain in a coaxial position relative to one another.
The inventive method is characterized in that the tool is inserted eccentrically into the bores and into the inner ring of at least one guide bearing and that the tool is aligned relative to the inner ring such that the cutting blades and the supports of the tool, when viewed in the axial direction of the inner ring, are positioned at the level of the pockets of the inner ring.
The inventive tool is guided in the guide bearing and centered therein. The cutting blades provided for machining the bore are positioned at the level of the profilings (pockets) of the guide bearing so that the cutting blades will not come into contact with the guide bearing. According to the inventive method, the tool is inserted eccentrically into the bores and pushed through the inner ring of the guide bearing. Due to the shaping of the tool and/or of the guide bearing, a collision of the cutting blades with the inner ring of the guide bearing or the precut bore sections is prevented with this inventive insertion method. Since the bore axis and the guide bearing axis remain coaxial to one another, a simple constructive design of the inventive device is realized.
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Becker R. W.
Carter Monica
Gebr. Heller Maschinenfabrik GmbH
R. W. Becker & Associates
Wellington A. L.
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