Tool for machining workpieces

Patent metadata

Field	Value
Publication number	US-2016107250-A1
Application number	US-201514918124-A
Country	US
Kind code	A1
Filing date	Oct 20, 2015
Priority date	Oct 15, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

A tool ( 2 ) for machining workpieces, comprising a carrier ( 4 ) rotating in an axial direction (A) during operation, and further comprising multiple cutting segments ( 6 ), which are fastened to the carrier ( 4 ) in a radial direction (R), characterized in that at least one hydraulic clamping unit ( 21 ) is attached to the carrier ( 4 ) for clamping at least one of the cutting segments ( 6 ) to the carrier ( 4 ).

First claim

1 . A tool ( 2 ) for machining workpieces, comprising a carrier ( 4 ) rotating in an axial direction (A) during operation, and further comprising multiple cutting segments ( 6 ), which are fastened to the carrier ( 4 ) in a radial direction (R),
characterized in that
at least one hydraulic clamping unit ( 21 ) is attached to the carrier ( 4 ) for clamping at least one of the cutting segments ( 6 ) to the carrier ( 4 ).

2 . The tool ( 2 ) according to the preceding claim,
characterized in that
the cutting segments ( 4 ) can be reversibly fixed, by clamping, to the carrier ( 4 ) jointly by means of a clamping ring ( 12 ).

3 . The tool ( 2 ) according to claim 1 ,
characterized in that
the carrier ( 4 ) and the clamping ring ( 12 ) are spaced apart from one another in the axial direction (A) and form a clamping groove ( 14 ) in which the cutting segments ( 6 ) are seated.

4 . The tool ( 2 ) according to claim 2 ,
characterized in that
the clamping ring ( 12 ) can be displaced in the axial direction (A) relative to the carrier ( 4 ) for this purpose by means of the hydraulic clamping unit ( 21 ).

5 . The tool ( 2 ) according to claim 2 ,
characterized in that
each of the cutting segments ( 6 ) has a segment base ( 8 ), which is seated in the clamping groove ( 14 ), and at least one of the parts, selected from the parts that are the carrier ( 4 ) and clamping ring ( 12 ), has a circumferential collar ( 22 ), which tapers the clamping groove ( 14 ) on a radially external section and surrounds the segment base ( 8 ).

6 . The tool ( 2 ) according to claim 5 ,
characterized in that
the collar ( 22 ) has an oblique gripping surface ( 26 ) which points inwardly with respect to the clamping groove ( 14 ) and engages an outwardly pointing, oblique shoulder surface ( 28 ) of the segment base ( 8 ).

7 . The tool ( 2 ) according to claim 2 ,
characterized in that
a transformation element ( 16 ), which is designed to transform a radial movement generated by the hydraulic clamping unit ( 21 ) into an axial movement of the clamping ring ( 12 ), is arranged on the carrier ( 4 ).

8 . The tool ( 2 ) according to claim 7 ,
characterized in that
the transformation element has a clamping wedge ( 16 ), which can be displaced in the radial direction (R) by means of the hydraulic clamping unit ( 21 ) and, with a wedge surface ( 18 ), engages a wedge bearing surface ( 20 ) of the clamping ring ( 12 ) so as to axially displace the same.

9 . The tool ( 2 ) according to claim 2 ,
characterized by
a pull-out limiter ( 36 ), which specifies a maximum axial pull-out (A max ) of the clamping ring ( 12 ) during detachment of the cutting segments ( 6 ).

10 . The tool ( 2 ) according to claim 1 ,
characterized by
a clamping element ( 30 ), which is used to generate hydraulic pressure by means of the hydraulic clamping unit ( 21 ) and, for this purpose, can be toggled between a clamping position and a release position, so as to clamp and release the cutting segments ( 6 ).

11 . The tool ( 2 ) according to claim 10 ,
characterized by
multiple hydraulic clamping units ( 21 ), which can be actuated jointly by means of the clamping element ( 30 ).

12 . The tool ( 2 ) according to claim 10 ,
characterized in that
the clamping element ( 30 ) is formed as a rotating annulus, which can be toggled between the clamping position and the release position by a rotation.

13 . The tool ( 2 ) according to claim 10 ,
characterized in that
in order to toggle between the clamping position and the release position, at least one eccentric actuating element ( 34 ) is attached on the clamping element ( 30 ) so as to actuate the hydraulic clamping unit ( 21 ) when toggling into the clamping position.

14 . The tool ( 2 ) according to claim 1 ,
characterized in that
at least one slot nut ( 38 ) is fastened to the carrier ( 4 ) for each of the cutting segments ( 6 ) so as to position the cutting segments ( 6 ) in the circumferential direction (U).

15 . The tool ( 2 ) according to claim 1 ,
characterized in that
the hydraulic clamping unit ( 21 ) is a self-contained assembly, which is mounted to the carrier ( 4 ).

Assignees

• Kennametal Inc

Inventors

• Denks Norbert
• Foettinger Sebastian
• Heinloth Markus
• Kurz Jochen
• Lill F H Erich
• Sponsel Guenter

Classifications

• B23C5/2234

  for plate-like cutting inserts fitted on a ring or ring segment · CPC title

• B23C2270/025

  Hydraulics · CPC title

• B23D2043/063

  with cutters mounted externally · CPC title

• B23D43/06 Primary

  for cutting by rotational movement · CPC title