DE8910440U1 - Holder for a machine tool - Google Patents

Description

U ₁ ^-ING. RALF MINETTI 2000 Hamburg &igr;. the 31st,..Mgu.|t. 1 9£ PATENT ATTORNEY Ballindamm 15 10/44 EUROPEAN PATENT ATTORNEY Phone: (040) 33 5115

Telex: 21 61 560 mine d Fax: (040)33 64 44

* Bank: Commerzbank AO, Account No. M/57

(Bank code 200 400 00) Postal check: Hamburg 2509 00-207

Note: Company Wilhelm Fette GmbK, {SLSsswoaaj

2053 Schwarzenbek my file: 6162/89

Holder for a machine tool

The invention relates to a holder for a machine tool, in particular a thread rolling head, which consists of a tool holder with a shaft and a cylindrical head as well as a base body for receiving the tool such as a thread rolling head.

When using modern machine tools such as NC and CNC lathes, which are of different designs, there is a need to be able to exchange tools of different sizes, such as different types of tangential rolling heads, in a simple and quick manner. It is therefore useful if the tool holders are designed in such a way that, on the one hand, they can be used on different types of machines, which also differ in the type of tool holder, and, on the other hand, are suitable for quick

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Exchange of tools such as tangential rolling heads of different sizes.

This requirement is met according to the invention in that, in a holder of the aforementioned type, the tool holder has a clamping bar that is adjustable in the direction of the shaft, which extends with its clamping body into a slot-shaped recess in the base body and has a threaded hole for receiving a clamping screw, which clamps the base body, which is adjustable to the head, to the head when tightened. This has the advantage that the center distance between a tool and the holder can be changed to suit the respective operating conditions and, in addition, tool holders of different sizes can be attached to a base body, so that holders of different sizes can be used on the machines for the use of tools and, for a given size of a holder, base bodies of different sizes can be used to hold tools of different sizes.

Easy handling is ensured if the clamping bar and the slot-shaped recess are prismatic or the slot-shaped recess is dovetail-shaped in the case of a prismatic design of the clamping bar, so that after loosening the clamping devices, a lateral displacement of the

base body to the tool holder and then clamp it again in a different position that is adapted to the respective operating conditions and the size of the tool. For this purpose, it has proven to be advantageous if the clamping surface of the head of the tool holder and the base body are each provided with a toothing, as this contributes to the absorption of the tangential forces that have to be absorbed by a tangential rolling head and also enables precise positioning of the tool.

These and other features of the invention are explained in more detail below using an embodiment, which is described with reference to a drawing. In the drawing:

Figure 1: a holder for a thread rolling head in perspective view;

Figure 2: the top view of the bracket; Figure 3: the bracket in the front view; Figure 4: the bracket in the side view and

Figure 5: a schematic representation of the possible applications.

The holder shown in the drawing for a thread rolling head in a machine not shown in the drawing consists of a tool holder 1 and a base body 2. The tool holder 1 has a cylindrical shaft 3 which is flattened on its upper side and provided with a toothing 6. The different sizes of the shaft 3 are standardized and thus adapted to the different mounts of different types of machines.

On its front side, the shaft 3 of the tool holder 1 has a cylindrical head 4 through which a slot-shaped groove 5 passes. The front side of the head 4, which forms the flange side for the base body 2, is provided with a 90° toothing 7.

For connecting a base body 2 to the tool holder 1, a clamping strip 8 is provided, which carries a prismatic base body 9 and a strip 10, which extends into the groove 5. The strip 10 is provided with a threaded hole 12 in its center, into which a clamping screw 13 extends, which runs through the shaft 3. By tightening the clamping screw 13, a clamping is achieved between the base body 2 and the tool holder 1, whereby precise positioning is achieved by a toothing 14 on the clamping surface of the base body 2, which

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interacts with the teeth 7 of the tool holder 1 and contributes to the absorption of tangential forces.

Two additional clamping screws 15 and 16, which extend through the head 4 into threaded holes in the terminal block 8, contribute to secure mounting.

The base body 2 is fork-shaped on its front side to accommodate a thread rolling head. Its two side walls 18 and 19 are connected by a bearing pin 20 for holding the thread rolling head 21, which is secured against twisting by a spring 23.

This makes it possible, after loosening the clamping screws, to change the distance between the two axes A-A and B-B and thus the distance between the axis of the tool holder and the position of the tool to the workpiece by appropriately moving the base body 2 to the tool holder 1 and to adjust it to suit the respective requirements. In addition, it is possible to connect a "round body 2" and its tool, such as a thread rolling head, to different tool holders 1 by exchanging them for a tool holder of a different size.

These extended application possibilities are shown schematically in Figure 5, from which it can be seen

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let that four tool holders 1 of different sizes with four base bodies 2 of different sizes can be used , which are designated there with Hi and Hs, Hs and H«. These different rolling head holders or base bodies 2 serve to accommodate differently sized tangential rolling heads Ti, Tt, Ts and T«, which carry different thread rollers 22.

Claims (1)

DlPL-ING. RALF MINETTI 2000 Hamburg &igr;, 31 August: PATENT ATTORNEY Ballindamm 15 * 1 Ö/4- EUROPEAN PATENT ATTORNEY Phone: (040) 3351 15 Telex: 21 61 560 mine d Fax: (040) 33 64 44 Bank: Commerzbank AQ. Account No. 38/57 (Bl-Z 200 400 00) Postal check: Hamburg 2909 00-207 Note: Wilhelm Fette GmbH, <bu 2001002» 2053 Schwarzenbek
my file: 6162/89 Expectations i^_ Holder for a machine tool, in particular a thread rolling head, consisting of a tool holder (1) with a shaft (3) and a cylindrical head (4) as well as a base body (2) for receiving the tool (21), characterized in that the tool holder (1, 3) carries a clamping bar (8) which is adjustable in the direction of the shaft (3), which extends with its clamping body (9) into a slot-shaped recess (11) of the base body (2) and has a threaded bore (12) for receiving a clamping screw (13) which, when tightened, clamps the base body (2) which is adjustable to the head (4) to the head (4). ii_ Holder according to claim 1, characterized in that the clamping strip (β) and the slot-shaped recess (11) are prismatic. &bull;t 3. Holder according to claim 1, characterized in that the clamping strip (8) carries a strip-shaped projection (10) which lies in a longitudinal groove (5) of the head (4) . 4. Holder according to claim ₁ , characterized in that the clamping screw (13) extends through the shaft {3}' and further screws (15, 16) for holding the terminal block (8) are arranged on the sides of the clamping screw (13). 5. Holder according to claim 1, characterized in that the clamping surface of the head (4) and the base body (2) is provided with a toothing (7, 14).