Forming machine

Abstract

A forming machine for forming a workpiece having a rotatably drivable gripping device. The gripping device comprises a first forming tool and a press-on tool adapted to press the workpiece in the direction of the first forming tool. The forming machine further comprises a second forming tool mounted at least substantially co-axially round the press-on tool. The second forming tool can be moved along the press-on tool.

What is claimed is:  
     
         1 . A forming machine for forming a workpiece comprising: 
 a rotatably drivable gripping device, the gripping device comprising a first forming tool and a press-on tool adapted to press the workpiece toward the first forming tool;    a second forming tool mounted at least substantially co-axially around the press-on tool, wherein the second forming tool can be moved along the press-on tool.    
     
     
         2 . The forming machine according to    claim 1    and further comprising a third forming tool mounted co-axially around the first forming tool, wherein the third forming tool can be moved along the first forming tool.  
     
     
         3 . The forming machine according to    claim 1   , wherein at least one of the second forming tool, the press-on tool and the third forming tool is movably mounted on the first forming tool.  
     
     
         4 . The forming machine according to    claim 3   , wherein the shape of said second and/or said third forming tool is at least partially complementary to the shape of the first and/or a second forming tool, respectively, complemented with the local thickness of the workpiece.  
     
     
         5 . The forming machine according to    claim 1    and further comprising two forming rollers.  
     
     
         6 . the forming machine according to    claim 5   , wherein the forming rollers are mounted on a single holder.  
     
     
         7 . A method for forming a workpiece comprising: 
 gripping the workpiece between a first forming tool and a press-on tool;    deforming the workpiece on the first forming tool by moving a forming roller in a path that corresponds to the shape of the first forming tool; and    deforming the workpiece on a second forming tool on side the workpiece remote from the first forming tool by moving a forming roller in a path that corresponds to the shape of the second forming tool.    
     
     
         8 . The method according to    claim 7    and further comprising deforming the workpiece on a third forming tool by moving a forming roller in a path that corresponds to the shape of the third forming tool.  
     
     
         9 . An exhaust system or a supply comprising a hollow product having a specific wall thickness, which has been obtained by means of the method according to    claim 7   .  
     
     
         10 . A forming machine for forming a workpiece comprising: 
 a rotatably drivable gripping device, the gripping device having a first forming tool and a press-on tool adapted to press the workpiece toward the first forming tool in a first direction; and    means for deforming the workpiece in a second direction substantially opposite from the first direction.