TOOL HOLDER

• US 20110217135A1
• Filed: 11/25/2009
• Published: 09/08/2011
• Est. Priority Date: 11/27/2008
• Status: Active Grant

• Current Assignee: Mapal Fabrik fuer Praezisionswerkzeuge Dr Kress KG (MAPAL Holding GmbH)
• Original Assignee: Mapal Fabrik fuer Praezisionswerkzeuge Dr Kress KG (MAPAL Holding GmbH)
• Inventors: Reinauer, Josef
• Granted Patent: US 8,430,004 B2
• Time in Patent Office: Days
• US Class Current: 409/136
• CPC Class Codes: B23B 2250/12 Cooling and lubrication
• CPC Class Codes: B23B 29/046 with an intermediary toolholder
• CPC Class Codes: B23B 31/261 clamping the end of the toolholder shank
• CPC Class Codes: Y10T 279/17411 Spring biased jaws
• CPC Class Codes: Y10T 409/304032 Cutter or work
• CPC Class Codes: Y10T 409/30952 with cutter holder
• CPC Class Codes: Y10T 82/2587 Turret type holder [e.g., multiple tools, etc.]
• CPC Class Codes: Y10T 82/2589 Quick release tool or holder clamp

Abstract

A tool holder includes a hollow taper shank chucking device having a center axis, a chucking device, a tension rod which cooperates with the chucking device and an actuating unit by means of which the tension rod may be actuated, i.e., displaced. The actuating unit has an actuating element which is movable at an angle relative to the center axis and which includes at least one actuating part. The angle may be 90°. The tension rod is provided with at least one engagement part. The actuating part and engagement part form a wedge mechanism which is used to convert a radial motion of the actuating element, i.e., a displacement perpendicular to the center axis, into an axial displacement of the tension rod in the direction of the center axis.

Claims

1-25. -25. (canceled)

26. A tool holder comprising:

a center axis;

a chucking device having at least one collet chuck insertable into a hollow shaft of a tool;

a tension rod having at least one engagement part, the tension rod movable in a direction of the center axis and cooperable with the at least one collet chuck such that in a first function position of the tension rod the at least one collet chuck is displaced radially outwardly into a chucking position, and in a second function position of the tension rod the at least one collet chuck is able to yield radially inwardly in the direction of the center axis; and

an actuating unit cooperating with the tension rod, the actuating unit having an actuating element which is movable at an angle of 90°

relative to the center axis, and which includes at least one actuating part, the actuating part and the engagement part forming a wedge mechanism, so that the actuating part causes an axial displacement of the tension rod when the actuating element is radially displaced.

27. The tool holder according to claim 26, wherein the wedge mechanism has a double-acting design.

28. The tool holder according to claim 26, wherein the actuating element laterally engages with the tension rod.

29. The tool holder according to claim 26, wherein the actuating element includes a receiving slot having two inner faces parallel to one another and oriented radially with respect to the center axis, in which the tension rod may be situated, an actuating part being provided at least one inner face which cooperates with an engagement part at the tension rod.

30. The tool holder according to claim 29, wherein an actuating part is provided at both inner faces.

31. The tool holder according to claim 26, wherein the actuating unit has a threaded spindle which on the one hand engages in the actuating element and on the other hand engages in the tool holder.

32. The tool holder according to claim 26, further comprising a threaded element introduceable into the tool holder and having an internal thread for the threaded spindle and the threaded element being a threaded ring having an external thread.

33. The tool holder according to claim 26, further comprising a coolant/lubricant supply.

34. The tool holder according to claim 33, further comprising a coolant/lubricant control unit.

35. The tool holder according to claim 26, wherein the tension rod has a hollow design.

36. The tool holder according to claim 35, wherein an actuating element is passed through the hollow tension rod.

37. The tool holder according to claim 35, wherein a coolant/lubricant tube is inserted in the tension rod and extends coaxially with respect to the center axis.

38. The tool holder according to claim 37, wherein the coolant/lubricant control unit is a fixing device which engages in an interior end of the coolant/lubricant tube.

39. The tool holder according to claim 38, wherein the fixing device is situated essentially perpendicular to the center axis.

40. The tool holder according to claim 34, wherein the coolant/lubricant control unit is situated in a coolant/lubricant channel of the coolant/lubricant supply.

41. The tool holder according to claim 40, wherein the coolant/lubricant channel has a first section which leads to a receptacle in the tool holder that accommodates a coolant/lubricant tube which may be inserted into the hollow tension rod and which extends coaxially with respect to the center axis.

42. The tool holder according to claim 40, wherein the coolant/lubricant channel has a second section which leads to an end face of the tool holder into which a tool having a hollow taper shank may be inserted.

43. The tool holder according to claim 42, wherein the coolant/lubricant control unit is designed in such a way that a fluid connection between the first section and a cavity may be closed by the coolant/lubricant control unit, while a fluid connection between the first section and the second section may be enabled.

44. The tool holder according to claim 42, wherein the coolant/lubricant control unit is designed in such a way that a fluid connection between the first section and the coolant/lubricant tube may be enabled by the coolant/lubricant control unit, while a fluid connection between the first section and the second section may be closed.

45. The tool holder according to claim 42, wherein the coolant/lubricant control unit has a first function position and a second function position, wherein:

in the first function position a fluid connection between the first section and a cavity may be closed, while a fluid connection between the first section and the second section may be enabled; and

in the second function position the fluid connection between the first section and the coolant/lubricant tube may be enabled, while the fluid connection between the first section and the second section may be closed.

46. The tool holder according to claim 26, further comprising a guide unit radially supporting the tension rod in the tool holder.

47. The tool holder according to claim 26, further comprising a mounting flange for fixing the hollow taper shank chucking device in the tool holder.

48. The tool holder according to claim 26, wherein the tool holder has multiple hollow taper shank chucking devices.

49. The tool holder according to claim 26, wherein the tool holder is designed as a drum turret.

50. The tool holder according to claim 26, wherein the tool holder is designed as a star turret.