Machine tool
In order to save the investment for a separate cold rolling machine for applying threads etc. a cold rolling unit is placed in a moveable manner onto the Z-drives of a turning machine wherein the cold rolling unit can be configured much larger and much more stable and with less wear than a cold rolling unit used in a tool revolver. Even parallel processing through turning and rolling is facilitated.
1. A material removing machine tool ( 1 ) with a work piece ( 100 ) driven in rotation about a rotation axis ( 10 ), which machine tool comprises:
a bed ( 5 );
a cold rolling unit ( 2 ) including a plurality of forming rollers ( 13 a, b ) and a base element ( 8 ) supporting the forming rollers ( 13 a, b );
a turning machine including a plurality of material removing tools ( 22 a , 22 b ) supported thereon, said turning machine also including a tool support ( 19 ) supporting the plurality of material removing tools;
a plurality of Z-guides ( 6 d , 6 c , 6 b ) on the bed for guiding movements of the tool support ( 19 ) in a direction of a Z-axis that is parallel to the rotation axis;
a plurality of Z-guides ( 6 c , 6 b , 6 a ) on the bed for guiding movements of the base element ( 8 ) in a direction of a Z-axis that is parallel to the rotation axis,
wherein some, but not all, of the plurality of Z-guides for guiding movements of the tool support ( 19 ) are the same as the plurality of Z-guides for guiding movements of the base element ( 8 ).
2. The material removing machine tool according to claim 1 , wherein the work piece is mounted in a spindle ( 17 ′) for rotation about the rotation axis ( 10 ), and wherein the tool support ( 19 ) is located between the cold rolling unit ( 2 ) and the spindle ( 17 ′).
3. The material removing machine tool according to claim 1 ,
wherein the base element ( 8 ) is moveable along the bed ( 5 ), and
wherein at least two forming roller units ( 9 a, b ) are moveable along the base element ( 8 ) in a direction towards the rotation axis ( 10 ) and in a direction away from the rotation axis ( 10 ), and
wherein the forming roller units are moved by hydraulic cylinders ( 15 a, b ).
4. The material removing machine tool according to claim 3 , wherein the forming roller units ( 9 a, b ) each include a respective drive motor ( 12 a, b ) for a respective one of the forming rollers ( 13 a, b ), and wherein the drive motors ( 12 a, b ) are synchronized with one another.
5. The material removing machine tool according to claim 3 , wherein the cold rolling unit ( 2 ) includes a tail stock center ( 14 ) which is moveable along the base element ( 8 ) of the cold rolling unit ( 2 ) along the Z axis far enough, so that the tail stock center ( 14 ) can support the work piece ( 100 ) during material removing processing.
6. The material removing machine tool according to claim 3 , wherein the work piece is mounted in a work piece spindle ( 17 ′) for rotation about the rotation axis ( 10 ), and wherein the machine tool ( 1 ) includes a tail stock or an opposite spindle that is located on an opposite side of the bed from the work piece spindle ( 17 ′), and wherein the forming roller units ( 9 a, b ) can be moved along the base element ( 8 ) and can be moved apart far enough in the direction ( 11 ) away from the rotation axis ( 10 ), so that the forming roller units can be moved in the direction of the Z-axis beyond a forward free end, which is configured to engage the work piece, of the tail stock center or of the opposite spindle of the machine tool ( 1 ).
7. The material removing machine tool according to claim 1 , wherein the forming rollers ( 13 a, b ) are each driven by a respective drive ( 12 a , 12 b ), and
wherein the machine tool ( 1 ) includes a control ( 16 ) which receives and processes signals with respect to speed and angular position of the forming roller drives and uses the signals for controlling material removing processing of the work piece ( 100 ).
8. The material removing machine tool according to claim 7 , wherein the machine tool ( 1 ) includes an automated measuring device for measuring the work piece ( 100 ), and the control ( 16 ) is configured to use measuring results of the measuring device for automatically adjusting the cold rolling unit ( 2 ).
9. The material removing machine tool according to claim 1 , wherein the cold rolling unit ( 2 ) is controlled by a control ( 16 ) of the machine tool ( 1 ).
10. The material removing machine tool according to claim 1 , wherein covers ( 23 a, b , 24 ) are provided that are moveable and are configured to completely enclose the cold rolling unit ( 2 ).
11. The material removing machine tool according to claim 1 , wherein the base element ( 8 ) is closed in an annular circumferential direction and internally supports forming roller units ( 9 a, b ) and is made from an integral one piece C-shaped base component ( 8 a ) which is moveable along the bed ( 5 ) and from a pull rod ( 8 b ) connecting the free ends of the C-shaped base component ( 8 a ).