Turning – Lathe – With program control
Reexamination Certificate
2002-06-19
2004-06-08
Fridie, Jr., Willmon (Department: 3722)
Turning
Lathe
With program control
C082S129000
Reexamination Certificate
active
06745654
ABSTRACT:
This application claims the benefit of German Patent Application No. 101 30 760.8 filed on Jun. 22, 2001.
BACKGROUND OF THE INVENTION
The invention relates to a lathe, comprising a machine frame, a first working spindle held on the machine frame and rotatable about a first spindle axis, this working spindle having a first receiving means for a first workpiece, at least one first tool carrier which can be moved in an X direction transversely to the first spindle axis for the machining of the first workpiece, a second working spindle which is rotatable about a second spindle axis, has a second workpiece receiving means for a second workpiece and in relation to the first working spindle can be brought from a position coaxial with the second spindle axis in relation to the first spindle axis into a non-coaxial position in a transverse direction extending transversely to the X direction and transversely to the first spindle axis, the first and the second spindle axes being arranged at a distance from one another in this non-coaxial position, and a first tool carrier on the front side for the machining of the first workpiece, this tool carrier being associated with a first working space and being movable from an inactive into an active position and vice versa with at least one tool as a result of a movement transversely to the X direction, as well as a second tool carrier on the front side for the machining of the second workpiece, this tool carrier being associated with a second working space and being arranged so as to be offset in the transverse direction in relation to the first working space.
Lathes of this type are known from the state of the art, for example, German patent application 196 21 406, wherein, in this known solution, the first tool carrier on the front side and the second working spindle can be moved together in the transverse direction.
As a result, it is necessary to coordinate the machining of the first workpiece with the tools arranged in the first tool carrier on the front side and the machining of the second workpiece with the tools arranged on the second tool carrier on the front side exactly with one another.
SUMMARY OF THE INVENTION
The object underlying the invention is, therefore, to design a lathe of the type described at the outset in such a manner that it is possible for machining operations on the first workpiece and the second workpiece to be as flexible as possible.
This object is accomplished in accordance with the invention, in a lathe of the type described at the outset, in that the first tool carrier on the front side and the second working spindle can be moved relative to one another in the transverse direction controlled by the machine control so that the movements of the second working spindle and the first tool carrier on the front side can be realized independently of one another.
As a result, it is possible to machine the first workpiece and the second workpiece at the same time, wherein the machining operations can be carried out disconnected from one another.
A tool carrier on the front side is to be understood within the scope of this application as a tool carrier which is arranged on a front side of a working space, in particular, opposite the working spindle. This tool carrier on the front side may bear tools, with which a front side of the workpiece can be machined but also tools for the circumferential machining at least close to the front side of the workpiece.
The relative movability of the second working spindle and the first tool carrier on the front side may be realized in the most varied of ways. It would, for example, be conceivable to move both in transverse direction on a common slide and to provide on this common cross slide an additional cross slide for the movement either of the second working spindle or of the first tool carrier on the front side in the transverse direction.
For reasons of the rigidity of the construction and the simplicity of the control, it is, however, particularly favorable when the first tool carrier on the front side and the second working spindle are each seated on a cross slide which can be moved in the transverse direction.
In principle, the first tool carrier on the front side could be displaceable with the cross slide directly in relation to the machine frame and independently thereof the second working spindle could also be arranged so as to be displaceable with the cross slide on the machine frame.
A solution which is particularly favorable from a constructional point of view on account of the space required provides for the first tool carrier on the front side to be seated on the same console as the second working spindle with its cross slide so that the mounting of the two relative to the machine frame is brought about via the console.
It is, therefore, possible, for example, to provide common guide means for the cross slide of the first tool carrier on the front side and the cross slide of the second working spindle, both being guided in the transverse direction on these guide means.
In order to have an additional axis of movement available during the machining of the first workpiece with the first tool carrier on the front side, it has proven to be favorable when the first tool carrier on the front side and the second working spindle are seated on a common slide movable in X direction in relation to the machine frame. Such a slide can be formed, for example, by the console.
This slide offers the possibility, on the one hand, of moving the tools of the first tool carrier on the front side not only in transverse direction but also in the X direction; on the other hand, this solution offers a simple possibility of positioning the second working spindle coaxially to the first working spindle for the transfer of the first machined workpiece to the second working spindle.
With respect to the movability of the second tool carrier on the front side relative to the second spindle axis, no further details have so far been given.
In principle, it is sufficient to utilize the movability of the second working spindle in the transverse direction for positioning the second workpiece relative to the tool of the second tool carrier on the front side.
If, for example, the second tool carrier on the front side is provided with a row of tools extending in the transverse direction, different tools can also be approached as a result of displacement in the transverse direction and machining operations can also be carried out at different radial distances from the second spindle axis due to the relative position of the second spindle axis in relation to the respective tool in the transverse direction.
However, in order not to allow the constructional size of the lathe to increase in the transverse direction and, therefore, also to keep the rigidity of the construction as great as possible during the machining of the second workpiece, it is preferably provided for the second tool carrier on the front side to be movable transversely to the second spindle axis and in a direction extending transversely to the transverse direction.
As a result, it is possible, on the one hand, to position the second workpiece relative to the respective tools of the second tool carrier on the front side due to the displacement of the second working spindle in the transverse direction but, at the same time, it is also possible to change from one tool of the second tool carrier on the front side to the other tool due to movement of the second tool carrier transversely to the transverse direction and, at the same time, to have two axes, namely and conventionally speaking, an X and a Y axis available for the machining of the second workpiece with each individual tool of the second tool carrier on the front side.
In this respect, the second tool carrier on the front side is preferably movable approximately in X direction.
In order, on the one hand, to achieve as rigid a construction as possible and in order, on the other hand, to keep the resources for the control of the machining of the second workpiece as small as possible, it is pr
Fridie Jr. Willmon
Lipsitz Barry R.
McAllister Douglas M.
Traub Drehmaschinen GmbH
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