Cutters – for shaping – Rotary cutting tool – Including holder having seat for inserted tool
Patent
1997-04-18
1999-02-09
Pitts, Andrea L.
Cutters, for shaping
Rotary cutting tool
Including holder having seat for inserted tool
407 38, 407 46, 407 53, 407 43, B23C 524
Patent
active
058685294
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This is a national phase application based upon a German application P 44 37 426.7 filed 20 Oct. 1994 and based, in turn, on an International application PCT/DE95/01453 filed 18 Oct. 1995 under the International Convention.
The invention relates to a milling cutter with a basic body and with an annular support element in the form of an emplacement ring for the cassettes with cutters arranged in the basic body.
BACKGROUND OF THE INVENTION
Basically milling cutters of the mentioned kind have been known for a long time. So for instance the DE 32 36 921 C1 describes a milling tool with an emplacement ring and with adjustment elements arranged between the emplacement ring and the cassette ends. Because of further functional elements being arranged therein, the shape and design of the recesses receiving the cassettes are expensive to produce and complicated. The production of the basic body is related to high costs and besides the basic body can only be used for special purposes.
OBJECT OF THE INVENTION
It is the object of the invention to provide the steps for a cost-effective production of a versatile basic body.
SUMMARY OF THE INVENTION
It is characteristic for the basic body of the invention that its channel-like recesses for the cassettes extend from one of its frontal surfaces to the other frontal surface without any projections and/or undercuts, whereby the bottom and walls of each recess receiving the cassettes are flat and smooth. Thereby it is not only possible to achieve a cost-effective production of the basic body itself due to less effort, but also to optimize the shape and design of the cassettes.
According to a further development of the invention, it is provided that to the basic body one or more of the following three annular support bodies be assigned, whereby a first annular support element has on the cassette side a continuous flat frontal surface, whereby in a further annular support element on the cassette side for each cassette a setting element is provided in a recess in the annular support element, whereby the clear width A of the recess is smaller towards the cassette than the width B of the support surface at the ring side end of the cassette and whereby a third annular support element has on the cassette side large contact surfaces for the direct engagement of the ends of respectively several cassettes, and in between respective separate frontally open recesses for adjustment elements, whereby again the clear width A of these recesses is smaller than the width B of the support surface at ring side end of the pertaining cassette.
The width B and the frontal clear width A of the recesses in the annular support element (emplacement ring) are adjusted to each other. This way it is achieved that the cassettes rest against the emplacement ring either in a fixed manner or are axially adjustable with the aid of the setting elements, which preferably are gibs. In this connection it is also finally provided that the setting elements/gibs are assigned only to individual cassettes, so that some cassettes serve for roughing-down machining, while the adjustable cassettes are provided for finishing.
Thus in principle on one and the same basic body three different emplacement rings can be used. A first emplacement ring has adjustment elements for each cassette. A second emplacement ring has no adjustment elements at all and in a third emplacement ring adjustment elements are provided for some, but not for all cassettes. In all cases the basic body remains the same.
BRIEF DESCRIPTION OF THE DRAWING
The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
FIG. 1 is a perspective view of the milling cutter;
FIG. 2 is a perspective view of the milling cutter at a smaller scale, as well as an exploded view;
FIG. 3 is a radial section through the milling cutter;
FIG. 4 is an exploded view of the essential parts of a modified milling
REFERENCES:
patent: 3359612 (1967-12-01), Mina et al.
patent: 3839772 (1974-10-01), Shimomura et al.
patent: 3847555 (1974-11-01), Pegler et al.
patent: 3946475 (1976-03-01), Hopkins
patent: 4264245 (1981-04-01), Lindsay
patent: 4995767 (1991-02-01), Segal
A New Range of Versatile Indexable-Tip Facing Cutters by W. Astrop, Midlands Editor, Machinery and Production Engineering, 8 Aug. 1973.
Maurer Jurgen
Rothballer Gerhard
Dubno Herbert
Pitts Andrea L.
Tsai Henry W. H.
Widia GmbH
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