Cutting by use of rotating axially moving tool – Tool-support with means to move tool relative to tool-support – To move radially
Patent
1995-05-15
1997-03-18
Bishop, Steven C.
Cutting by use of rotating axially moving tool
Tool-support with means to move tool relative to tool-support
To move radially
82 12, 82131, 408143, 408147, B23B 324
Patent
active
056116519
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a boring tool comprising a tool body which can be clamped into a rotatingly driven spindle and rotates with this spindle, a tool slide displaceable in a guide means in the tool body transversely to its axis of rotation, a cutting plate interchangeably attached to the tool slide for removing material, a micrometer screw for adjusting the tool slide in its guide means, this micrometer screw being mounted in the tool body transversely to its axis of rotation so as to be rotatable and axially non-displaceable, and adjustable counterbalancing masses for balancing the boring tool in relation to its axis of rotation.
A boring tool of this type is known from DE-A1-35 10 259. With this boring tool, the unbalanced masses have to be adjusted separately from the adjustment of the tool slide in order to bring about the balancing of the boring tool.
The object of the invention is to develop a boring tool of the generic type further such that the displacements of mass occurring during the radial adjustment of the tool slide are automatically counterbalanced so that no troublesome, out-of-balance forces result.
This object is accomplished in accordance with the invention in that
a distance above the tool slide (7), leaving a space (16) free and drives a drive slide (19) displaceable in the tool body (2) transversely to its axis of rotation (B); between drive and tool slides (19 and 7, respectively), this lever engaging with its one arm on the drive slide (19) and with its other arm on the tool slide (7) such that when the drive slide (19) is displaced by the micrometer screw (17) the tool slide (7) is entrained in the opposite direction to the drive slide (19) in accordance with the leverage ratio of the transfer lever (22); and counterbalancing mass, wherein this mass, on the one hand, and the mass of the tool slide (7), including cutting plate (15), on the other hand, are determined such that the entire arrangement of drive and tool slides (7, 19) is always balanced in relation to the axis of rotation (B) during their movement in opposite directions.
With a known boring tool of a different type (DE-C2-39 26 026), a lever engaging on a sleeve via a ball is pivoted by axial displacement of the sleeve and this lever, with its other end, radially adjusts a head part which is flexible in itself and, for its part, supports a boring tool. During the radial adjustment of the head part, a radial adjustment of a slide takes place at the same time in the opposite direction via an additional ball which automatically results in a compensation of imbalances.
Due to the use of a separate slide for compensating imbalances which is not connected directly to a lever but requires a separate part, namely the ball 25, for its drive, this arrangement is complicated and susceptible to failures and is not comparable to the inventive solution because, in this case, the transfer lever directly triggers not only the adjustment of the tool slide but also the compensation of imbalances by displacing the drive slide. An additional part for compensating imbalances corresponding to the ball of the known arrangement is therefore omitted in the invention.
The following description of a preferred embodiment of the invention serves to explain the invention in greater detail in conjunction with the attached drawings. In the drawings:
FIG. 1 is a schematic view of an axial section of a boring tool;
FIG. 2 is a partially cutaway side view of the boring tool in the direction of arrow A in FIG. 1;
FIG. 3 is a part-sectional view similar to FIG. 1 with a tool slide in a different position and
FIG. 4 is a bottom view of a cover for the boring tool from FIGS. 1 to 3.
The boring tool 1 illustrated in the drawings comprises an essentially circular-cylindrical tool body 2 which is outwardly enclosed by a sleeve 3, preferably consisting of a chrome alloy. The tool body 2 has a shaft 4 projecting in one piece which can be clamped, e.g. by means of a chuck, into a rotatingly driven spindle 5 of a machine tool so that the boring tool 1 rotates a
REFERENCES:
patent: 4040315 (1977-08-01), Bellingham
patent: 4607549 (1986-08-01), Krempel
Gahr Harold
Maar Peter
Wohlhaupter Manfred
Wohlhaupter-Hermann Rolf
Bishop Steven C.
Wohlhaupter GmbH
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