Tool holder equipped with a damping means and comprising a device for preventing excessive heating of the damping means

• US 9,079,256 B2
• Filed: 06/28/2011
• Issued: 07/14/2015
• Est. Priority Date: 06/28/2010
• Status: Active Grant

• Current Assignee: Seco EPB
• Original Assignee: Seco EPB
• Inventors: Freyermuth, Alain, Ostermann, Matthieu, Roos, Cedric
• Primary Examiner(s): Howell, Daniel
• Assistant Examiner(s): VITALE, MICHAEL J
• Application Number:
  US13/170,254
• Publication Number:
  US 20110318127A1
• Time in Patent Office: 1,477 Days
• Field of Search: 409/141, 409/234, 408/143, 279/102, 279/103, 279/157
• US Class Current: 1/1
• CPC Class Codes: B23B 2250/16 Damping of vibrations
• CPC Class Codes: B23B 31/1179 using heating and cooling
• CPC Class Codes: B23C 2250/16 Damping vibrations
• CPC Class Codes: B23C 5/003 with vibration suppressing means
• CPC Class Codes: Y10T 279/17957 Friction grip
• CPC Class Codes: Y10T 408/76 Tool-carrier with vibration-damping means
• CPC Class Codes: Y10T 409/304312 with means to dampen vibration
• CPC Class Codes: Y10T 82/2595 with noise or vibration dampener

Abstract

A tool holder (1) in the form of a boring head, a chuck, a milling cutting arbor, or the like, is equipped with a damping element (2) in the form of an elongated body that is arranged in an end housing (3) of the tool holder (1), with corresponding shape and size. The tool holder that is characterized in that it includes a device (4) for preventing excessive heating of the damping element (2). The tool holder is more particularly applicable in the field of numerically-controlled machine tool accessories, machining centers, and flexible cells and workshops.

Claims

1. A tool holder, comprising:

an outer first part (1) having a rear end and an opposite front end, the front end having a sleeve (5) that accommodates one of a group consisting of a boring head, and a milling cutting arbor;

an end housing (3) within the outer first part;

a damping means (2) in the form of an elongated body, the damping means (2) being arranged in the end housing (3) and having a shape and a size corresponding to a shape and a size of the end housing, the damping means (2) having a first end towards the front end of the outer first part and a second end towards the read end of the outer first part; and

a device (4) for preventing excessive heating of the damping means (2), the device (4) being positioned between first end of the damping means (2) and the sleeve (5) such that the device (4) for preventing excessive heating provides a shield that covers an entirety of the first end of the damping means (2) in a plane perpendicular to a longitudinal axis of the tool holder at the first end of the damping means (2).

2. Tool holder (1), according to claim 1, wherein the device (4) for preventing excessive heating of the damping means (2) consists of a heat-insulating buffer (41) that extends in front of the end of the damping means (2) from the side of the latter located closest to the sleeve (5).

3. Tool holder (1), according to claim 2, wherein the damping means (2) is mounted in the end housing (3) of the tool holder (1) by the rear surface of the latter, on the side that is opposite to the sleeve (5) and is held in said end housing (3) by means of a plug (6).

4. Tool holder (1), according to claim 2, wherein the damping means (2) is mounted in the tool holder (1) by its front surface, with it being held securely in place by means of a plug that is also introduced by its front surface.

5. Tool holder (1), according to claim 1, wherein the device (4) for preventing excessive heating of the damping means (2) consists of a receptacle (42) for housing the damping means (2), whereby this receptacle is inserted into the end housing (3) of the tool holder (1) and is closed by a wall (42′

) at least on its side that is rotated toward the sleeve (5).

6. Tool holder (1), according to claim 5, wherein the damping means (2) is mounted in the end housing (3) of the tool holder (1) by the rear surface of the latter, on the side that is opposite to the sleeve (5) and is held in said end housing (3) by means of a plug (6).

7. Tool holder (1), according to claim 5, wherein the damping means (2) is mounted in the tool holder (1) by its front surface, with it being held securely in place by means of a plug that is also introduced by its front surface.

8. Tool holder (1), according to claim 1, wherein the damping means (2) is mounted in the end housing (3) of the tool holder (1) by the rear surface of the latter, on the side that is opposite to the sleeve (5), and is held in said end housing (3) by means of a plug (6).

9. Tool holder (1), according to claim 1, wherein the damping means (2) is mounted in the tool holder (1) by its front surface, with it being held securely in place by means of a plug that is also introduced by its front surface.

10. Tool holder (1), according to claim 1, wherein,

the outer first part (1) with the sleeve (5) has a longitudinal axis,

the end housing (3), the damping means (2) and the sleeve are aligned with each other and the longitudinal axis,

the device (4) for preventing excessive heating of the damping means (2) is positioned between the damping means (2) and the sleeve (5) and is aligned with the longitudinal axis,

the device (4) being one of another group consisting of

i) a heat-insulating buffer (41) that extends in front of an end of the damping means (2) from a side of the damping means (2) closest to the sleeve (5), the heat-insulating buffer (41) insulating said end housing (3) against heat obtained directly from the sleeve (5), and

ii) a receptacle (42) that houses the damping means (2), the receptacle located within the end housing (3) and closed by a wall (42′

) positioned between a) an end of the damping means (2) closest the sleeve (5) and b) the sleeve (5).

11. Tool holder (1), according to claim 1, wherein,

the outer first part (1) with the sleeve (5) has a longitudinal axis,

the end housing (3), the damping means (2) and the sleeve are aligned with each other and the longitudinal axis,

the device (4) for preventing excessive heating of the damping means (2) is positioned between the damping means (2) and the sleeve (5) and is aligned with the longitudinal axis,

the device (4) is a heat-insulating buffer (41) that extends in front of an end of the damping means (2) from a side of the damping means (2) closest to the sleeve (5), the heat-insulating buffer (41) comprising a material of glass fibers immersed in a resin, the heat-insulating buffer (41) insulating said end housing (3) against heat obtained directly from the sleeve (5).

12. Tool holder (1), according to claim 1, wherein,

the outer first part (1) with the sleeve (5) has a longitudinal axis,

the end housing (3), the damping means (2) and the sleeve are aligned with each other and the longitudinal axis,

the device (4) for preventing excessive heating of the damping means (2) is positioned between the damping means (2) and the sleeve (5) and is aligned with the longitudinal axis,

the device (4) is a receptacle (42) that houses the damping means (2), the receptacle located within the end housing (3) and closed by a wall (42′

) positioned between a) an end the damping means (2) closest the sleeve (5) and b) the sleeve (5).

13. A tool holder, comprising:

an outer first part (1) with a sleeve (5) that accommodates one of a group consisting of a boring head, and a milling cutting arbor;

an end housing (3) within the outer first part;

a damping means (2) in the form of an elongated body, the damping means (2) being arranged in the end housing (3) and having a shape and a size corresponding to a shape and a size of the end housing; and

a device (4) for preventing excessive heating of the damping means (2), wherein, a length of the end housing (3) is greater than a length of said damping means (2), and the prevention of excessive heating is carried out by a movement of the damping means (2) from i) an operating position, in which the damping means (2) is placed and is held at one end of the end housing (3), near the sleeve (5), to ii) a position for preventing the heating in which the damping means (2) is placed and is held at the opposite end of the end housing (3).

14. Tool holder (13), according to claim 13, wherein the holding of the damping means (2) in its two end positions is ensured by means of two pressure screws (43) that work—

each in one of the positions of the damping means (2)—

with a circular median groove (21) of said damping means (2).

15. Tool holder (1), according to claim 14, wherein the damping means (2) is mounted in the end housing (3) of the tool holder (1) by the rear surface of the latter, on the side that is opposite to the sleeve (5) and is held in said end housing (3) by means of a plug (6).

16. Tool holder (1), according to claim 13, wherein the holding of the damping means (2) in its two end positions is ensured by a device with two retractable balls that work—

each in one of the positions of the damping means (2)—

with a circular median groove (21) of said damping means (2).

17. Tool holder (1), according to claim 16, wherein the damping means (2) is mounted in the end housing (3) of the tool holder (1) by the rear surface of the latter, on the side that is opposite to the sleeve (5) and is held in said end housing (3) by means of a plug (6).

18. Tool holder (1), according to claim 13, wherein the damping means (2) is mounted in the end housing (3) of the tool holder (1) by the rear surface of the latter, on the side that is opposite to the sleeve (5) and is held in said end housing (3) by means of a plug (6).

19. Tool holder (1), according to claim 13, wherein the damping means (2) is mounted in the tool holder (1) by its front surface, with it being held securely in place by means of a plug that is also introduced by its front surface.

20. A tool holder (1), comprising:

an outer first part (1) with a sleeve (5) that accommodates a boring head;

a housing (3) within the outer first part;

a damping means (2) having an elongated body, the damping means (2) being arranged in the housing (3), a length of the housing (3) being greater than a length of the damping means (2); and

a device (4) for preventing excessive heating of the damping means (2), wherein the prevention of excessive heating is carried out by a movement of the damping means (2) from i) a first operating position in which the damping means (2) is placed and is held at a first end of the housing (3) near the sleeve (5), to ii) a second position for preventing the heating in which the damping means (2) is placed and is held at an opposite second end of the housing (3).