Turning – Lathe – Tool rest
Reexamination Certificate
2000-12-27
2003-02-04
Tsai, Henry (Department: 3722)
Turning
Lathe
Tool rest
C082S161000, C082S158000, C082S121000
Reexamination Certificate
active
06513410
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a tool support for machine tools comprising a base unit, a holding member which is arranged on the base unit and on which two supporting surfaces extending at an acute angle to one another are arranged for supporting a tool holder in a first supporting area and a second supporting area, and a clamping device for acting on a clamping member of the tool holder in a clamping direction extending in such a manner that the tool holder acts upon the supporting surfaces with the first and the second supporting areas.
Tool supports of this type are known, for example, from EP 0 799 663.
With this solution, the clamping device is, however, provided with a tightening screw which is complicated to actuate.
The object underlying the invention is therefore to improve a tool support of the generic type in such a manner that clamping of a tool holder is possible in as simple a way as possible.
SUMMARY OF THE INVENTION
This object is accomplished in accordance with the invention, in a tool support of the type described at the outset, in that the clamping element is mounted in the holding member for rotation about an axis and bears a wedge surface movable on a path around the axis for acting on the clamping member and that the wedge surface of the clamping element engages over the clamping member proceeding from an insert position during the rotation in a first direction of rotation and acts upon this clamping member so as to displace it increasingly in the clamping direction.
The advantage of the inventive invention is to be seen in the fact that with it it is possible to clamp the tool holder in a simple manner since a rotation of the clamping element through less than 360° is adequate to clamp the clamping member by means of the clamping device.
As a result, a clamping of the tool holder can be realized with a simple rotary movement of the clamping element.
In principle, it is possible to arrange the clamping element at any optional location. In order to be able to act on the tool holder in a particularly simple manner and, in particular, to ensure a simple insert movement of the tool holder without the clamping element being arranged, for example, on the drive side of the tool holder, it is provided for the clamping element to be arranged in an area of the holding member bearing the supporting surfaces.
A particularly advantageous arrangement of the clamping element provides for this to be arranged in the holding member on a side of one of the supporting surfaces located opposite the tool holder.
The rotatable mounting of the clamping element can be brought about in the most varied of alignments thereof. One advantageous solution provides for the clamping element to be rotatable about an axis extending transversely to the supporting surface.
The mounting of the clamping element is favorably brought about such that this is rotatably mounted in a bore passing through the holding member.
With respect to the arrangement of the clamping link member, the most varied of possibilities are conceivable. One advantageous type of arrangement provides for the clamping element to be movable in such a manner that the wedge surface crosses the insert path of the clamping member.
In this respect, it is particularly favorable when the wedge surface, in the insert position of the clamping element, is arranged outside an insert path of the clamping member which this describes during the insertion of the tool holder into the tool support and when the wedge surface extends transversely to this insert path with the area acting upon the clamping member following rotation of the clamping element in the first direction.
As a result, the tool holder may be inserted in a particularly simple manner and this insertion also takes place without hindrance and allowance for the wedge surface used for the clamping.
It is particularly advantageous when the adjusting clamping element is arranged such that it is in a position to act on the clamping member which can be introduced in an entry channel arranged in the holding member so as to be recessed in relation to one of the supporting surfaces.
A particularly favorable solution for the insertion of the tool holder provides for the holding member to be designed such that it allows a straight insert path for the clamping member and thus for the tool holder, as well.
In this respect it is particularly favorable when the insert path extends parallel to one of the supporting surfaces.
With respect to the rotary movement which is necessary in order to clamp the tool holder, it has merely been assumed thus far that a rotation of the clamping element through less than 360° is necessary. It is particularly favorable when the clamping element is rotatable through an angle of less than 270°, even better of less than 180°, for the clamping of the tool holder.
So far, it has not been discussed in detail how the wedge surface is intended to be designed and arranged on the clamping element. A particularly advantageous constructional solution provides for the clamping element to comprise a clamping link member bearing the wedge surface.
In this respect, the clamping link member is preferably designed to be bent in the shape of a sickle so that, accordingly, the wedge surface is also bent in the shape of a sickle and can be brought into abutment on the clamping member in a simple manner by way of rotation of the clamping element.
In order, in particular, to facilitate the insertion of the tool holder, it is preferably provided for the clamping element to have a recess which is located in front of an initial area of the clamping link member and through which the clamping member can be brought into the operative area of the clamping link member during its movement in insert direction. In this respect, the clamping link member is preferably not designed as a link member closed in a circular shape but rather has on one side an opening which is preferably arranged so as to be aligned with the insert path of the clamping member when the clamping element is in an insert position.
In principle, it would be conceivable with the inventive solution to form the clamping link member on an outer casing surface of a rotatable member, for example, in the form of a ridge with a wedge surface located so as to face away from the member.
A particularly favorable solution from a constructional point of view which is particularly space-saving does, however, provide for the clamping link member to bear the wedge surface on a side facing the axis of the clamping element.
A particularly simple solution for the production of a clamping element provides for the clamping element to comprise a hollow cylinder which forms the clamping link member with a wall section, wherein, particularly in the case of a recess in front of the initial area of the clamping link member, the wall section is not a closed, cylindrical wall section but rather extends only over an angular area of less than 360°.
It is particularly favorable for a secure clamping of the tool holder when the wedge surface is designed as a self-locking wedge surface.
With respect to the alignment of the supporting surfaces and the clamping element relative to one another, no further details have so far been given. In principle, there are no limitations as long as the clamping member can be brought into the operative area of the clamping element.
One particularly favorable solution provides for the supporting surfaces and the clamping element to be arranged relative to one another in such a manner that the tool holder can be abutted with the first and the second supporting areas on the corresponding supporting surfaces due to a movement along a straight insert path and can be brought into the operative area of the clamping element with the clamping member.
Constructionally, this may be realized in any optional manner. For example, it would be conceivable for the clamping element to project beyond one of the supporting surfaces and, for example, for the corresponding supporting area of the tool holder to be subdiv
Forst Heinz
Koeneke Rainer
Sonnek Werner
Lipsitz Barry R.
Traub Drehmaschinen GmbH
Tsai Henry
LandOfFree
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