Tool holder such as a boring head, a chuck, or a milling cutting arbor integrating a damping device

• US 8,899,891 B2
• Filed: 06/28/2011
• Issued: 12/02/2014
• Est. Priority Date: 06/28/2010
• Status: Active Grant

• Current Assignee: Seco EPB
• Original Assignee: Seco EPB
• Inventors: Freyermuth, Alain, Ostermann, Mathieu, Roos, Cdric
• Primary Examiner(s): Howell, Daniel
• Assistant Examiner(s): VITALE, MICHAEL J
• Application Number:
  US13/170,440
• Publication Number:
  US 20110318130A1
• Time in Patent Office: 1,253 Days
• Field of Search: 409/141, 409/234, 408/143, 408/56, 279/20, 279/102, 279/103, 279/157
• US Class Current: 409/234
• CPC Class Codes: B23B 2250/12 Cooling and lubrication
• CPC Class Codes: B23B 27/002 with vibration damping means
• CPC Class Codes: B23B 29/022 with vibration reducing means
• CPC Class Codes: B23B 31/1179 using heating and cooling
• CPC Class Codes: B23C 5/00 Milling-cutters for cutting gear-teeth B23F21/12
• CPC Class Codes: B23C 5/003 with vibration suppressing means
• CPC Class Codes: B23Q 11/10 Arrangements for cooling or lubricating tools or work incorporated in tools, see the relevant subclass for the tool , e.g. B23B27/10, B23B51/06, B23C5/28, B23D77/006; for circular saw blades B23D59/02, for cooling grinding surfaces B24B55/02
• CPC Class Codes: B23Q 11/1023 Tool holders, or tools in general specially adapted for receiving the cutting liquid from the spindle
• CPC Class Codes: Y10T 279/17111 Fluid-conduit drill holding
• CPC Class Codes: Y10T 279/34 Accessory or component
• CPC Class Codes: Y10T 408/44 with means to apply transient, fluent medium to work or product
• CPC Class Codes: Y10T 408/76 Tool-carrier with vibration-damping means
• CPC Class Codes: Y10T 409/303976 with means to control temperature or lubricate
• CPC Class Codes: Y10T 409/304312 with means to dampen vibration
• CPC Class Codes: Y10T 409/30952 with cutter holder

Abstract

A damping tool holder, such as a boring head, a chuck, or a milling cutting arbor, integrates a damping device (2), in the form of an elongated body. The damping device (2) is housed in a mounting body (3), connected by one end to the tool-holder body (1) and having at its other end an end fitting (4) for mounting a tool, whereby the mounting body (3) is equipped with at least one lubricant feed pipe (32), emptying at its front end into the end fitting (4) for mounting a tool and connected at its other end to a circular groove (102) for distributing lubricant that is provided on the front surface of the tool holder (1).

Claims

1. A Tool holder, comprising:

a mounting body (3);

a tool-holder body (1) located at a first end of the mounting body (3);

a circular groove (102) for distributing lubricant provided on a front surface of the tool holder body (1);

a first end fitting (4) for mounting a tool located at an opposite, second end of the mounting body (3);

a damping means (2), in the form of an elongated body, wherein the damping means (2) is housed in the mounting body (3); and

at least one lubricant feed pipe (32) located within the mounting body (3), the at least one lubricant feed pipe (32) having i) a front first end that empties into the first end fitting (4) for mounting a tool and ii) an opposite, second end connected to the circular groove (102) for distributing lubricant that is provided on the front surface of the tool holder (1).

2. Tool holder according to claim 1, wherein the mounting body (3) has a housing (31) for accommodating the damping means (2), the housing having a front end that is connected to the front end of the tool-holder body (1) by screwing or by force-fitting a second end fitting (101).

3. Tool holder according to claim 2, wherein the closing of the housing (31) of the damping means (2) is implemented by direct screwing or by force-fitting of the second end fitting (101) in the front end of the housing (31).

4. Tool holder according to claim 3, wherein in the case of implementing said first end fitting (4) for mounting a tool by clamping, the mounting body (3) is also equipped with a device (5) for preventing excessive heating of the damping means (2).

5. Tool holder according to claim 2, wherein the mounting body (3) comes in the form of a receptacle with thin walls.

6. Tool holder according to claim 2, wherein in the case of implementing said first end fitting (4) for mounting a tool by clamping, the mounting body (3) is also equipped with a device (5) for preventing excessive heating of the damping means (2).

7. Tool holder according to claim 1, wherein the mounting body (3) comes in the form of a receptacle with thin walls.

8. Tool holder according to claim 7, wherein in the case of implementing said first end fitting (4) for mounting a tool by clamping, the mounting body (3) is also equipped with a device (5) for preventing excessive heating of the damping means (2).

9. Tool holder according to claim 1, wherein in the case of implementing said first end fitting (4) for mounting a tool by clamping, the mounting body (3) is also equipped with a device (5) for preventing excessive heating of the damping means (2).

10. Tool holder according to claim 9, wherein the device (5) for preventing excessive heating of the damping means (2) consists of a heat-insulating buffer (51) that extends in front of the end of the damping means (2) from the side of the latter located close to the first end fitting (4).

11. Tool holder according to claim 9, wherein the device (5) for preventing excessive heating of the damping means (2) consists of a receptacle (52) for housing the damping means (2), whereby this receptacle is inserted into the housing (31) of the tool holder (1) and is closed by a wall (52′

) at least on one side rotated toward the first end fitting (4).

12. Tool holder according to claim 9, wherein the device (5) for preventing excessive heating of the damping means (2) essentially consists of the provision of a housing (31) of the damping means (2) of a length that is greater than the length of said damping means (2), with the prevention of excessive heating being implemented by a movement of the damping means (2) from an operating position, in which the damping means (2) is placed and is held at one end of the housing (31), as close as possible to the first end fitting (4), to a position for preventing heating, in which the damping means (2) is placed and is held at the opposite end of the housing (31).

13. Tool holder according to claim 12, wherein holding the damping means (2) in its two end positions is ensured by means of two pressure screws (53) that work—

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

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

14. Tool holder according to claim 12, 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).

15. A Tool holder, comprising:

a mounting body (3);

a tool-holder body (1) located at a first end of the mounting body (3);

a circular groove (102) for distributing lubricant provided on a front surface of the tool holder body (1);

a first end fitting (4) for mounting a tool located at an opposite, second end of the mounting body (3);

a damping means (2), in the form of an elongated body, wherein the damping device (2) is housed in the mounting body (3);

a lubricant feed pipe (32) located within the mounting body (3), said lubricant feed pipe (32) having i) a front first end that empties into the first end fitting (4) for mounting a tool and ii) an opposite, second end connected to the circular groove (102) for distributing lubricant that is provided on the front surface of the tool holder (1);

a housing (31) accommodating the damping means (2), the housing having a front end that is connected to the front end of the tool-holder body (1), said housing (31) having a length that is greater than a length of said damping means (2); and

a device (5) for preventing excessive heating of the damping means (2) providing 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 (31) nearest the first end fitting (4), and ii) a second position in which the damping means (2) is placed and is held at an opposite, second end of the housing (31) nearest the tool-holder body (1).

16. Tool holder of claim 15, wherein,

the damping means (2) comprises a circular median groove (21),

the device (5) for preventing excessive heating of the damping means (2) comprises two pressure screws (53),

a first of said two pressure screws (53) engages the circular median groove to hold the damping means (2) in the first, operating position in which the damping means (2) is placed and is held at the first end of the housing (31), and

a second of said two pressure screws (53) engages the circular median groove to hold the damping means (2) in the second position in which the damping means (2) is placed and is held at the opposite, second end of the housing (31).

17. Tool holder of claim 15, wherein,

the damping means (2) comprises a circular median groove (21),

the device (5) for preventing excessive heating of the damping means (2) comprises two retaining elements,

a first of said two retaining elements engages the circular median groove to hold the damping means (2) in the first, operating position in which the damping means (2) is placed and is held at the first end of the housing (31), and

a second of said two retaining elements engages the circular median groove to hold the damping means (2) in the second position in which the damping means (2) is placed and is held at the opposite, second end of the housing (31).

18. Tool holder of claim 17, wherein,

said two retaining elements comprise two retractable balls.