Straightenting machine for straightening elongated bodies

Abstract

A straightening machine for straightening an elongated body, such as a pipe, a composite pipe or a rod, including a machine frame ( 2,3 ) and a number of radially adjustable straightening rolls ( 32 - 35 ) mounted alongside a straightening channel ( 20 ) and offset or alternatingly on supports ( 24 - 27 ) in the direction of the longitudinal axis ( 10 ) and in a circumferential direction. The machine allows an adjustment to different diameters or outer contours of the elongated bodies, and for this purpose, the supports ( 24 - 27 ) are guided in at least one displacement plate ( 8, 9 ) about the longitudinal axis ( 10 ) of the straightening channel ( 20 ). The displacement plate ( 8, 9 ) includes first adjustment elements ( 36 - 39 ) which engage second adjustment elements ( 40, 41 ) on the supports ( 24 - 27 ) such that the radial spacing of the straightening rolls ( 32 - 35 ) relative to the longitudinal axis ( 10 ) is changed by turning the displacement plate ( 8, 9 ).

What is claimed is:  
     
         1 . A bending machine for straightening an elongated body, comprising a machine frame and a plurality of straightening rollers disposed in said frame, said rollers being mounted on supports along a straightening channel displaced along and circumferentially around an axis of said straightening channel, and said straightening rollers being radially adjustable such that the elongated body can be moved through the straightening channel, wherein said supports are guided in at least one displacement plate that can be rotated about the longitudinal axis of the straightening channel; said displacement plate comprising first adjustment elements which engage second adjustment elements on the supports, and wherein the radial distance of the radially adjustable straightening rollers relative to the longitudinal axis can be changed by rotating the displacement plate.  
     
     
         2 . A bending machine according to  claim 1 , wherein the first adjustment elements are constructed as spiral grooves and the second adjustment elements are constructed as shafts that engage the spiral grooves.  
     
     
         3 . A bending machine according to  claim 1 , wherein the first adjustment elements are constructed as shafts, and the second adjustment elements are constructed as spiral grooves in which said shafts engage.  
     
     
         4 . A bending machine according to  claim 1 , wherein the machine frame comprises openings through which the body to be straightened is passed.  
     
     
         5 . A bending machine according to  claim 1 , wherein the machine frame comprises two guide plates spaced an axial distance from one another.  
     
     
         6 . A bending machine according to  claim 5 , wherein said guide plates comprise openings through which the body to be straightened is passed.  
     
     
         7 . A bending machine according to  claim 1 , wherein the supports are axially mounted between the two axially spaced displacement plates.  
     
     
         8 . A bending machine according to  claim 1 , wherein the displacement plates are axially mounted between two guide plates arranged at a distance from one another on the machine frame.  
     
     
         9 . A bending machine according to  claim 1 , wherein the displacement plates are connected to one another by an adjustment handle.  
     
     
         10 . A bending machine according to  claim 1 , wherein the machine frame has at least one axial projection having an outer surface upon which the displacement plate is rotatably mounted.  
     
     
         11 . A bending machine according to  claim 5 , wherein the guide plates have at least one axial projection having an outer surface upon which the displacement plate is rotatably mounted.  
     
     
         12 . A bending machine according to  claim 1 , wherein the machine frame has at least one guide surface coaxial to the longitudinal axis for the displacement plate.  
     
     
         13 . A bending machine according to  claim 5 , wherein the guide plates have support surfaces coaxial to the longitudinal axis for the displacement plate.  
     
     
         14 . A bending machine according to  claim 1 , wherein the machine frame and/or the guide plates ( 2 ,  3 ) have essentially radially aligned guide grooves ( 46 - 49 ) for radially guiding the supports.  
     
     
         15 . A bending machine according to  claim 1 , wherein guide bodies on respective supports engage the guide grooves.  
     
     
         16 . A bending machine according to  claim 15 , wherein the guide bodies are constructed as essentially axially aligned shafts.  
     
     
         17 . A bending machine according to  claim 1 , wherein each of the respective supports is axially penetrated by at least one rod.  
     
     
         18 . A bending machine according to  claim 17 , wherein the second adjusting elements are formed by free ends of the rods projecting from the supports and engage the spiral groove of the first adjusting elements.  
     
     
         19 . A bending machine according to  claim 17 , wherein the rods have free ends which engage radial guide grooves in the guide plate associated with the respective support.  
     
     
         20 . A bending machine according to  claim 1 , further comprising a cutting device comprising at least two cutting rollers.  
     
     
         21 . A bending machine according to  claim 20 , wherein the cutting device including the cutting rollers is mounted on two diametrically opposed supports.  
     
     
         22 . A bending machine according to  claim 1 , wherein the straightening rollers are respectively arranged between two bearing blocks of the associated support and are rotatably mounted.