Tool holder for a cutting insert

Patent metadata

Field	Value
Publication number	US-2016136733-A1
Application number	US-201514944601-A
Country	US
Kind code	A1
Filing date	Nov 18, 2015
Priority date	Nov 19, 2014
Publication date	May 19, 2016
Grant date	—

Abstract

The invention relates to a tool holder ( 10 ) for a cutting insert ( 18 ), having a shank ( 12 ), a counter bearing ( 14 ) on which a pocket ( 16 ) for a cutting insert ( 18 ) is provided, disposed on the front end of the shank, and a clamping segment ( 20 ) integrally joined to the shank ( 12 ) via a bending segment ( 22 ); wherein the clamping segment ( 20 ) has a clamping finger ( 28 ) and a clamping element ( 26 ) such that the clamping finger ( 28 ) is capable of acting against the counter bearing segment ( 14 ) by means of the clamping element ( 26 ), thereby enabling a cutting insert ( 18 ) to be clamped between the clamping finger ( 28 ) and the counter bearing segment ( 14 ); wherein the clamping segment ( 20 ) protrudes beyond the top side of the shank ( 12 ); and wherein a coolant supply passage ( 40, 42, 44, 46 ) extends through the shank ( 12 ) and the bending segment ( 22 ) into the clamping segment ( 20 ); wherein the coolant supply passage ( 40, 42, 44, 46 ) has a shank passage ( 46 ), a clamping finger passage ( 40 ), and a connecting passage ( 44 ) that starts from the shank passage ( 46 ) and extends through the bending segment ( 22 ); characterized in that the connecting passage ( 44 ) is disposed in a longitudinal center region of the tool holder ( 10 ) and, on its rear side ( 30 ) facing toward the shank ( 12 ), the clamping segment ( 20 ) extends less far in a direction toward the rear end of the shank ( 12 ) on both sides of the longitudinal center segment than it does in the longitudinal center segment.

First claim

1 . A tool holder ( 10 ) for a cutting insert ( 18 ), having a shank ( 12 ), a counter bearing ( 14 ) on which a seat ( 16 ) for a cutting insert ( 18 ) is provided, disposed on the front end of the shank, and a clamping segment ( 20 ) integrally joined to the shank ( 12 ) via a bending segment ( 22 ); wherein the clamping segment ( 20 ) has a clamping finger ( 28 ) and a clamping element ( 26 ), such that the clamping finger ( 28 ) is capable of being urged against the counter bearing segment ( 14 ) by means of the clamping element ( 26 ), thereby enabling a cutting insert ( 18 ) to be clamped between the clamping finger ( 28 ) and the counter bearing segment ( 14 ); wherein the clamping segment ( 20 ) projects beyond the top side of the shank ( 12 ); and wherein a coolant supply passage ( 40 , 42 , 44 , 46 ) extends through the shank ( 12 ) and the bending segment ( 22 ) into the clamping segment ( 20 ); wherein the coolant supply passage ( 40 , 42 , 44 , 46 ) has a shank passage ( 46 ), a clamping finger passage ( 40 ) and a connecting passage ( 44 ) that starts from the shank passage ( 46 ) and extends through the bending segment ( 22 ); characterized in that the connecting passage ( 44 ) is located in a longitudinal center region of the tool holder ( 10 ), and—on its rear side ( 30 ) facing away from the shank ( 12 )—the clamping segment ( 20 ) extends less far in a direction toward the rear end of the shank ( 12 ) on both sides of the longitudinal center segment than it does in the longitudinal center segment.

2 . The tool holder according to claim 1 , characterized in that the rear side ( 30 ) is of curved design and the center of curvature is located on the longitudinal center plane of the shank ( 12 ).

3 . The tool holder according to claim 1 , characterized in that the rear side ( 30 ) has a center segment ( 32 ) and on both sides thereof a side segment ( 34 ), wherein as considered in plan view the side segments ( 34 ) extend slightly forward starting from the center segment.

4 . The tool holder according to claim 3 , characterized in that each of the side segments ( 34 ) is flat.

5 . The tool holder according to claim 3 , characterized in that each of the side segments ( 34 ) is curved.

6 . The tool holder according to claim 3 , characterized in that the center segment ( 32 ) is flat.

7 . The tool holder according to claim 1 , characterized in that the rear side ( 30 ) extends at an angle in a range of 80° to 110° relative to the top side of the shank ( 12 ).

8 . The tool holder according to claim 7 , characterized in that the rear side ( 30 ) extends at an angle of about 90° relative to the top side of the shank ( 12 ).

9 . The tool holder ( 1 ) according to claim 1 , characterized in that the connecting passage ( 44 ) extends approximately perpendicular to the longitudinal center axis of the shank ( 12 ).

10 . The tool holder according claim 1 , characterized in that a transverse passage ( 42 ) is provided that connects the connecting passage ( 44 ) to the clamping finger passage ( 40 ).

Assignees

• Kennametal Inc

Inventors

• Kaufmann Igor
• Abdul Anwar Mohideen

Classifications

• B23B29/043

  with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts (B23B29/14 takes precedence) · CPC title

• Y10T407/25

  including cut off tool · CPC title

• B23B27/10 Primary

  Cutting tools with special provision for cooling {(drills with lubricating or cooling equipment B23B51/06; features relating to lubricating or cooling of milling cutters B23C5/28; arrangements or devices for cooling or lubricating tools or work B23Q11/10)} · CPC title

• B23B2250/12

  Cooling and lubrication · CPC title

• B23B2205/02

  Fixation using an elastically deformable clamping member · CPC title