Gfm Gesellschaft Fur Fertigungstechnik Und Maschinenbau

Gfm Gesellschaft Fur Fertigungstechnik Und Maschinenbau Gesellschaft

Boehlerit Gmbh & Co. Kg.

Peter Kirchberger

Gottfried Blaimschein

Bruno Kralowetz

An indexable insert for a milling tool that includes at least one mounting surface having a through bore for fixing the insert to a rotatable tool, a rounded cutting edge defined by at least one cutting face and a lateral surface, and the at least one cutting face being arranged on a lateral side of the insert and extending from a base. The base is angled with respect to the at least one mounting surface. This abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Indexable insert for milling tools

A method of centering and thus balancing workpieces to be machined only in part comprises a provision of centering bores in and faces of the workpiece and/or a circular machining of peripheral surfaces on which the workpiece is adapted to the gripped. Before the workpiece is machined it is repositioned so that the rotary unbalance of the workpiece is reduced in that the position and/or mass distribution of the workpiece relative to its axis of rotation is changed. The workpiece is subsequently provided with the centering bores and/or with the surfaces to be gripped, which define the balanced and centered position of the workpiece and the associated axis of rotation. To permit a more economical final balancing of the workpiece when it has been machined the required change of the position and/or mass distribution of the workpiece is determined in that in the total rotary unbalance of the workpiece, on the one hand, and the rotary unbalance which is due to those portions of the workpiece which are to be machined, on the other hand, are determined, and that the rotary unbalance which is due to those portions of the workpiece which are intended not to be machined is subsequently determined by a computation from the rotary unbalances which have previously been determined.

Method of centering and thus balancing workpieces to be machined only in

A clamping device (5) is provided, which serves to fix a rotarty cutter (3, 3a) to a toolholder (2, 2a). The rotary cutter (3, 3a) has a planar radial contacting surface (15, 15a) for engaging a planar radial end face (16, 16a) of the toolholder. Load-applying means (7, 8a) are provided for forcing the rotary cutter by means of a conical interface (13) against the toolholder (2). In order to provide a simple clamping device by which the rotary cutter is secured to the toolholder exactly in a desired position, the load-applying means (7, 7a) engage clamping means (6, 6a), which define the conical interface (13) with the rotary cutter (3, 3a) and which are supported on the toolholder (2, 2a) at a cylinder interface (14) and are elastically deformed by the load-applying means.

Clamping device for fising a disklike rotary cutter to a toolholder

An inserted tooth cutter comprises a disc-shaped cutter body, which is provided at its periphery with an annular series of tooth holders, each of which is individually fixed and adapted to receive at least one platelike cutting tooth. In order to ensure that the tooth holders will be mounted in a stable position with an optimum utilization of space, each tooth holder is fixed by means which force the tooth holder against the cutter body in a generally radial direction and each tooth holder has at one end a shoulder-forming extension bearing on a mating extension of an adjacent tooth holder and has adjacent to the other end a bottom surface portion bearing on a mating surface of the cutter body.

Inserted tooth cutter

A disc-shaped cutter body (1; 101; 201) is provided with a multiplicity of tooth plates (4; 104; 204, 204a), which engage suitable backing and end-supporting surfaces (5, 6, 7; 105, 106, 107, 205, 205a, 206, 206a, 207, 207a) of tooth holders (3; 103; 203) inserted in recesses formed by radial grooves (2; 102; 202) in the cutter body. Each tooth plate is clamped between a tooth holder and a head portion (9; 109; 209a, 209b) of an elongated holding-back member (8; 108; 208), which has a foot portion (10; 110; 210) that is disposed in the recess of the cutter body and bears on said tooth holder. To enable the tooth plates to be reliably fixed in a narrow cutter body by means which involve only a small expenditure and with a controlled clamping force and to facilitate the handling of the tooth plates and the means for fixing them, each tooth plate (4; 104; 204, 204a) is held in position by the head portion (9; 109; 209; 209a ) of a resilient holding-back member (8; 108; 208), which between its head and foot portions bears on a surface (12; 112; 212) of the recess in the cutter body.

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Haag, Austria

Peter Kirchberger