Rolling mill

Abstract

The present application relates to a rolling mill ( 100 ) for rolling metal rods, wires or pipes along a rolling axis, wherein the rolling mill ( 100 ) comprises two or more stands ( 1 ) which are arranged one behind the other along the rolling axis and are in each case received in a stand base ( 70 ), wherein each of the stands ( 1 ) comprises three rollers ( 20.1, 20.2, 20.3 ) which are positioned on one roller shaft ( 22.1, 22.2, 22.3 ) in each case, surround the rolling axis in a star-shaped manner, and together form a caliber ( 21 ), wherein at least two of the three roller shafts ( 22.1, 22.2, 22.3 ) of each of the stands ( 1 ) are in each case operatively connected to a drive unit ( 80.1, 80.2, 80.3 ). The drive unit ( 80.1, 80.2, 80.3 ) comprises a motor ( 81.1, 81.2, 81.3 ) having a motor shaft, and a gearbox ( 82.1, 82.2, 82.3 ) having a Z-shaped gearbox housing ( 83.1, 83.2, 83.3 ) and having a drive shaft ( 84.1, 84.2, 84.3 ) which is coupled to the motor shaft, and having an output shaft ( 86.1, 86.2, 86.3 ) which is offset in parallel with the drive shaft ( 84.1, 84.2, 84.3 ) and which is coupled to the roller shaft ( 22.1, 22.2, 22.3 ). The drive units ( 80.1, 80.2, 80.3 ) are configured in a first and in a second configuration, wherein a part of the drive shaft ( 80.1, 80.2, 80.3 ) protruding out of the gearbox housing ( 83.1, 83.2, 83.3 ), and a part of the output shaft ( 86.1, 86.2, 86.3 ) protruding out of the gearbox housing ( 83.1, 83.2, 83.3 ), are in each case arranged so as to overlap axially with or so as to be axially free of overlap with respect to a part of the gearbox housing ( 83.1, 83.2, 83.3 ).

1 . A rolling mill for rolling metal rods, wires, or pipes along a rolling axis, comprising:
 two or more stands arranged one behind the other along the rolling axis and each stand received in a stand base,   wherein each of the stands comprises three rollers each positioned on a respective roller shaft, the three rollers surrounding the rolling axis in a star-shaped manner, and collectively forming a caliber,   wherein at least two of the three roller shafts of each of the stands are operatively connected to a respective drive unit,   each drive unit comprising a motor having a motor shaft, and a gearbox having a Z-shaped gearbox housing, a drive shaft coupled to the motor shaft, and an output shaft offset in parallel with the drive shaft and coupled to the roller shaft, and   wherein the drive unit, of at least a first roller shaft of each respective stand, is configured in a first configuration,   wherein in the first configuration a part of the drive shaft protruding out of the gearbox housing, era part of the motor shaft and a part of the output shaft protruding out of the gearbox housing, or a part of the roller shaft, are configured to overlap axially with a part of the gearbox housing, and   wherein the drive unit of at least a second roller shaft of each respective stand the stands is configured in a second configuration,   wherein in the second configuration, a part of the drive shaft protruding out of the gearbox housing and the motor shaft, and a part of the output shaft protruding out of the gearbox housing and the roller shaft, are arranged without overlap, with respect to the gearbox housing.   
     
     
         2 . The rolling mill according to  claim 1 , wherein a third roller shaft of each respective stand is also operatively connected to a drive unit,
 wherein the drive unit of the third roller shaft of each respective stand comprises a motor having a motor shaft, and a gearbox having a Z-shaped gearbox housing, and having a drive shaft which is coupled to the motor shaft, and an output shaft offset in parallel with the drive shaft and coupled to the roller shaft,   wherein the drive unit is configured in the first configuration or in the second configuration.   
     
     
         3 . The rolling mill according to  claim 1 , wherein each drive shaft coupled to the motor shaft is flush with the motor shaft. 
     
     
         4 . The rolling mill according to  claim 1 , wherein each output shaft coupled to the roller shaft is flush with the roller shaft. 
     
     
         5 . The rolling mill according to  claim 1 , wherein the roller shafts of adjacent stands are oriented in parallel with one another and are configured to be offset from one another perpendicularly to the roller axis,
 wherein all the drive units operatively connected to the respective roller shafts that are oriented in parallel with one another are configured in the first configuration or are configured in the second configuration.   
     
     
         6 . The rolling mill according to  claim 5 , wherein the drive units of adjacent stands, which are operatively connected to respective roller shafts that are oriented in parallel with one another, are oriented such that the output shafts are offset alternately in opposite directions, relative to the drive shafts. 
     
     
         7 . The rolling mill according to  claim 1 , wherein a first of the three roller shafts of each of the stands is oriented such that the drive unit operatively connected thereto is located above the stands,
 wherein the drive units operatively connected to each of the first of the three roller shafts are configured in the first configuration.   
     
     
         8 . The rolling mill according to  claim 7 , wherein the motors of the drive units operatively connected to each of the first of the three roller shafts are mounted on the gearbox housing of the respective drive unit by way of a bracket. 
     
     
         9 . The rolling mill according to  claim 1 , wherein a second of the three roller shafts of each of the stands is oriented such that the drive unit operatively connected thereto is located below the stands,
 wherein the drive units operatively connected to each of the second of the three roller shafts are configured in the second configuration.   
     
     
         10 . The rolling mill according to  claim 1 , wherein a third of the three roller shafts of each of the stands is oriented horizontally, such that the drive unit operatively connected thereto is located next to the stands,
 wherein the drive units operatively connected to the third of the three roller shafts are configured in the second configuration,   or wherein the drive units operatively connected to the third of the three roller shafts are configured in the first configuration.   
     
     
         11 . The rolling mill according to  claim 1 , wherein the gearbox housing further comprises at least one intermediate shaft. 
     
     
         12 . The rolling mill according to  claim 11 , wherein the gearbox further comprises a switching shaft. 
     
     
         13 . The rolling mill according to  claim 1 , wherein the stand has a hexagonal external shape when viewed along the rolling axis.