Tool for the turning/turn broaching of workpieces

Patent metadata

Field	Value
Publication number	US-9707632-B2
Application number	US-201414315392-A
Country	US
Kind code	B2
Filing date	Jun 26, 2014
Priority date	Jul 23, 2013
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A tool for the turning/turn broaching of workpieces is provided, including a carrier which can be attached directly or indirectly to a machine tool with a plurality of segments which are fastened to the carrier. Each of the segments is provided with a plurality of tool bits. In addition, each of the segments is attached to the carrier by at least two fastening elements, which act obliquely to a plane (E) lying perpendicular to the rotational axis (R) of the tool.

First claim

What is claimed is:

1. A tool for the turning/turn broaching of workpieces, comprising a carrier which can be attached directly or indirectly to a machine tool and comprising a plurality of segments which are fastened to the carrier, wherein each of the segments is provided with a plurality of tool bits, wherein each segment is attached to the carrier by means of at least two fastening elements, which act obliquely to a plane lying perpendicular to the rotational axis of the tool;
wherein each of the fastening elements is arranged in a pocket, in which a clamping means for one of the tool bits is also provided.

2. The tool as claimed in claim 1 , wherein the fastening elements are screws.

3. The tool as claimed in claim 1 , wherein a driver is provided that acts between the carrier and the segment in the peripheral direction.

4. The tool as claimed in claim 3 , wherein the driver is attached to the carrier and engages in a recess on the segment.

5. The tool as claimed in claim 1 , wherein the carrier is provided with a collar against which the fastening elements pull the appropriate segment.

6. The tool as claimed in claim 1 , wherein a loss prevention device for the fastening element is fitted in the pocket.

7. The tool as claimed in claim 1 , wherein a plurality of positioning elements, which guarantee a clear positioning of each segment on the carrier, are provided.

8. The tool as claimed in claim 7 , wherein the positioning element is realized as a screw pin, which, starting from a contact surface on the carrier, extends outward and projects into a bore in the appropriate segment.

9. The tool as claimed in claim 1 , wherein each segment, on its front and rear end viewed in the peripheral direction, is provided radially on the inside with a bevel.

10. A tool for the turning or turn broaching of workpieces, said tool comprising:
a carrier which is attachable directly or indirectly to a machine tool; and
a plurality of segments fastened to the carrier, wherein each of the segments is provided with a plurality of tool bits;
each of the segments being fastened to the carrier via at least two corresponding fastening elements;
wherein each of the fastening elements acts obliquely with respect to a plane lying perpendicular to the rotational axis of the tool, and pulls the corresponding segment toward an axial stop;
wherein each of the fastening elements is arranged in a pocket of the corresponding segment; and
wherein each pocket includes a clamping arrangement for a corresponding one of the tool bits.

11. The tool as claimed in claim 10 , wherein:
the carrier comprises a peripheral face onto which the segments are fastened; and
the axial stop protrudes radially outwardly beyond the peripheral face of the carrier.

12. The tool as claimed in claim 11 , wherein the axial stop protrudes radially outwardly beyond the peripheral face of the carrier, at an axial end of the carrier.

13. The tool as claimed in claim 11 , wherein the axial stop comprises a collar which is fixed with respect to the carrier.

14. The tool as claimed in claim 13 , wherein the collar and carrier are configured in one piece with respect to one another.

15. The tool as claimed in claim 10 , wherein the fastening elements comprise screws.

16. The tool as claimed in claim 10 , further comprising:
a driver which acts, in a peripheral direction, between the carrier and at least one of the segments;
wherein the driver is attached to the carrier and engages in a recess on the at least one of the segments.

17. The tool as claimed in claim 10 , wherein a loss prevention device for the fastening element is fitted in the pocket.

18. The tool as claimed in claim 10 , further comprising:
a plurality of positioning elements, which guarantee a clear positioning of each segment on the carrier;
wherein each positioning element comprises a screw pin which, starting from a contact surface on the carrier, extends outwardly and projects into a bore in the corresponding segment.

19. The tool as claimed in claim 10 , wherein each segment, on its front and rear end viewed in a peripheral direction, is provided radially on the inside with a bevel.

Assignees

• Kennametal Inc

Inventors

• Heinloth Markus
• Sponsel Günter
• Grünler Jan
• Föttinger Sebastian

Classifications

• Y10T407/15

  Rotary broach · CPC title

• B23D43/06 Primary

  for cutting by rotational movement · CPC title

• B23C2240/24

  Connections using screws · CPC title

• B23C5/08

  Disc-type cutters · CPC title

• B23D2043/063

  with cutters mounted externally · CPC title