Modular carrier tool and tool head

Patent metadata

Field	Value
Publication number	US-10052698-B2
Application number	US-201414513590-A
Country	US
Kind code	B2
Filing date	Oct 14, 2014
Priority date	Oct 15, 2013
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

The modular carrier tool ( 2 ), in particular drilling tool, extends along a central longitudinal axis ( 4 ) in axial direction ( 6 ) and comprises a carrier ( 8 ) as well as a tool head ( 10 ) that can be reversibly mounted on the front-end of the carrier ( 8 ). The carrier ( 8 ) has a head retainer ( 14 ) for the insertion of the tool head ( 10 ) as well as clamping webs ( 24 ), which radially delimit the head retainer ( 14 ) and also have bearing surfaces ( 28 ). The tool head ( 10 ) comprises clamping surfaces ( 35 ) extending in axial direction as well as underhead bearing surfaces ( 34 ). In a mounted state the clamping webs ( 24 ) clamp the tool head ( 10 ) in radial direction to the clamping surfaces ( 35 ) and the underhead bearing surfaces ( 34 ) are pressed against the bearing surfaces ( 28 ). In order to generate a force component (K) acting in radial direction unto the clamping webs ( 24 ), the bearing surfaces ( 28 ) as well as the underhead bearing surfaces ( 34 ) are tilted in radial direction towards the central longitudinal axis ( 4 ) by a tilt angle α. This particularly supports the radially exerted clamping force of the elastic clamping webs ( 24 ).

First claim

The invention claimed is:

1. A modular carrier tool which extends along a central longitudinal axis in an axial direction and comprises a carrier as well as a tool head that can be reversibly mounted on a front-end of the carrier, wherein:
the carrier comprises:
a head retainer for the insertion of the tool head; and
clamping webs which define radially outermost portions of the head retainer and include bearing surfaces extending along a radial direction; and

the tool head comprises:
clamping surfaces extending in an axial direction;
underhead bearing surfaces;
flute sections; and
torque transmission surfaces which:
extend radially to an outer periphery of the tool head; and
extend axially from the underhead bearing surfaces toward a front of the tool head;

wherein, along a peripheral direction of the tool head, each of the underhead bearing surfaces extends between one of the torque transmission surfaces and one of the flute sections;

wherein, in a mounted state:
the clamping webs clamp the tool head to the clamping surfaces in a radial direction with respect to the central longitudinal axis; and
the underhead bearing surfaces are pressed against the bearing surfaces of the carrier;

wherein the bearing surfaces of the carrier and the underhead bearing surfaces are tilted at a tilt angle defined along a radial direction with respect to the central longitudinal axis, such that in the mounted state a force component is exerted on the clamping webs in a radial direction with respect to the central longitudinal axis.

2. The carrier tool according to claim 1 , wherein:
the bearing surfaces of the carrier and the underhead bearing surfaces are tilted radially outwardly, such that the exerted force component is oriented in a radial direction towards the central longitudinal axis.

3. The carrier tool according to claim 1 , wherein the tilt angle is in the range of 0.5 to 10°.

4. The carrier tool according to claim 1 , wherein the underhead bearing surfaces and the bearing surfaces of the carrier are conical shell segments.

5. The carrier tool according to claim 1 , wherein:
the clamping webs each have an open front end face;
each open front end face, in the mounted state, is not covered by the tool head;
the bearing surfaces of the carrier are recessed, in an axial direction, relative to the open front end faces; and
surfaces for torque transmission are formed between the end faces and the bearing surfaces of the carrier.

6. The carrier tool according to claim 1 , wherein, for clamping retention in the head retainer, a fastening pin is adjoined to the underhead bearing surfaces in an axial direction.

7. The carrier tool according to claim 1 , wherein:
the carrier has flutes; and
the flutes are extended into the tool head as the flute sections.

8. The carrier tool according to claim 1 , wherein the tool head is configured to be fastened in the head retainer solely via clamping.

9. The carrier tool according to claim 1 , wherein the carrier tool is a drilling tool.

10. A tool head for reversible fastening in a carrier for a carrier tool, the tool head extending in an axial direction along a central longitudinal axis, the tool head comprising:
clamping surfaces extending in an axial direction;
underhead bearing surfaces extending in an axial direction, via which the tool head sits on bearing surfaces of the carrier in a mounted state;
flute sections; and
torque transmission surfaces which:
extend radially to an outer periphery of the tool head; and
extend axially from the underhead bearing surfaces toward a front of the tool head;
wherein, along a peripheral direction of the tool head, each of the underhead bearing surfaces extends between one of the torque transmission surfaces and one of the flute sections;

wherein the underhead bearing surfaces are tilted at a tilt angle defined along a radial direction with respect to the central longitudinal axis.

11. The tool head according to claim 10 , wherein:
the underhead bearing surfaces are radially tilted in an outwardly sloped manner.

12. The tool head according to claim 9 , wherein the tilt angle is in the range of 0.5 to 10°.

13. The carrier tool according to claim 6 , comprising:
an insertion pin which extends axially away from the fastening pin, wherein the insertion pin and fastening pin are concentric with respect to one another;
the insertion pin defining a smaller outer diameter than the fastening pin;
the carrier including a receptacle for the fastening pin and a receptacle for the insertion pin;
the receptacle for the fastening pin and the receptacle for the insertion pin being concentric with respect to one another.

14. A modular carrier tool comprising:
a carrier for accommodating a tool head, the carrier comprising bearing surfaces extending along a radial direction with respect to a central longitudinal axis of the modular carrier tool; and
a tool head comprising:
underhead bearing surfaces which engage with the bearing surfaces of the carrier, when the tool head is accommodated in the carrier;
flute sections; and
torque transmission surfaces which:
extend radially to an outer periphery of the tool head; and
extend axially from the underhead bearing surfaces toward a front of the tool head;

wherein, along a peripheral direction of the tool head, each of the underhead bearing surfaces extends between one of the torque transmission surfaces and one of the flute sections;

wherein the bearing surfaces of the carrier and the underhead bearing surfaces are tilted at a tilt angle defined along a radial direction with respect to the central longitudinal axis.

15. The modular carrier tool according to claim 13 , wherein the tool head is configured to be reversibly mounted at a front-end of the carrier.

Assignees

• Kennametal Inc

Inventors

• Guter Tim

Classifications

• Y10T408/90987

  Wedge means · CPC title

• Y10T408/9098

  with means to retain Tool to support · CPC title

• Y10T408/9097

  Spiral channel · CPC title

• B23B2205/02

  Fixation using an elastically deformable clamping member · CPC title

• B23B51/02 Primary

  Twist drills · CPC title