Method and Arrangement for Roll-forming a Plane Product with Varying Width

Abstract

During the roll-forming of a plate bar section ( 11 ) to a profile ( 12, 13 ) with variable width and upright sides ( 22,23 ) with (FIG. 1 ) or without (FIG. 2 ) flanges ( 24, 25 ), the upright sides ( 22, 23 ) are clamped in one of the last three forming stations (FIG. 12 ). This can yield a product with a plane bottom so that the product is not bent up (FIG. 8 ) or down (FIG. 10 ), which happens without the above-cited clamping (FIG. 13 ) of the upright sides ( 22, 23 ).

1 . Roll-forming machine comprising two rows of forming stations ( 32 ,  33 ) for forming a plane bar section ( 11 ) to a product ( 12 ,  13 ) with a central bottom part ( 21 ) with a width varying along the product's length and with upright sides ( 22 ,  23 ), wherein the forming stations ( 32 ,  33 ) can move laterally ( 61 ,  62 ) and rotationally ( 71 ,  72 ), 
       characterized by
 an arrangement ( 51 ,  52 ) in one of the three last forming stations ( 32 ,  33 ) on each side for clamping the upright profile side ( 22 ,  23 ), comprising 
 a clamping roller ( 45 ,  46 ) with a constant clamping force ( 55 ,  56 ) with a forming roller ( 41 ,  42 ) as holding-up tools, wherein 
 the contact surfaces of the forming rollers ( 41 ,  42 ) and the clamping rollers ( 45 ,  46 ) are parallel with the upright side ( 22 ,  23 ). 
 
     
     
         2 . Roller forming machine according to  claim 1 , 
       characterized by that
 the clamping arrangement ( 51 ,  52 ) is placed in the next to the last forming station. 
 
     
     
         3 . Roller forming machine according to  claim 1 , 
       characterized by that
 in the clamping arrangement ( 51 ,  52 ) are clamping rollers ( 45 ,  46 ) placed on the inside of the profile above the bottom part ( 21 ). 
 
     
     
         4 . Roller forming machine according to  claim 1 , 
       characterized by that
 in the clamping arrangement ( 51 ,  52 ) are clamping rollers ( 45 ,  46 ) placed on the outside of the profile. 
 
     
     
         5 . Roller forming machine according to  claim 1 , 
       characterized by that
 the clamping forces ( 55 ,  56 ) of the clamping rollers ( 43 ,  44 ) are produced by a pressure cylinder ( 57 ,  58 ). 
 
     
     
         6 . Roll-forming machine according to  claim 5 , 
       characterized by that
 the pressure cylinder ( 57 ,  58 ) is hydraulic. 
 
     
     
         7 . Roll-forming machine according to  claim 5 , 
       characterized by that
 the pressure cylinder ( 57 ,  58 ) is electrical. 
 
     
     
         8 . Roll-forming machine according to  claim 5 , 
       characterized by that
 the pressure cylinder ( 57 ,  58 ) is pneumatic. 
 
     
     
         9 . Method for roll-forming a plane bar section ( 11 ) to a product ( 12 ,  13 ) with a central, plane bottom part ( 21 ) with a varying width and upright sides ( 22 ,  23 ) by successively bending up the sides in a number of forming stations, 
       characterized by that
 the bent-up sides ( 22 ,  23 ) are clamped over the entire height of the sides with a constant force ( 55 ,  56 ) directly after or in conjunction with a complete bending up. 
 
     
     
         10 . Method according to  claim 9 , 
       characterized by that
 in one of the three last forming stations ( 32 ,  33 ) the bent-up sides ( 22 ,  23 ) are clamped with clamping rollers ( 45 ,  46 ) and the forming rollers ( 41 ,  42 ) of the forming stations are used as holding-up tools. 
 
     
     
         11 . Method according to  claim 10 , 
       characterized by that
 the clamping takes place on each side of the upright profile side ( 22 ,  23 ) in the next to the last forming station ( 32 ,  33 ). 
 
     
     
         12 . Roller forming machine according to  claim 2 , 
       characterized by that
 in the clamping arrangement ( 51 ,  52 ) are clamping rollers ( 45 ,  46 ) placed on the inside of the profile above the bottom part ( 21 ). 
 
     
     
         13 . Roller forming machine according to  claim 2 , 
       characterized by that
 in the clamping arrangement ( 51 ,  52 ) are clamping rollers ( 45 ,  46 ) placed on the outside of the profile. 
 
     
     
         14 . Roller forming machine according to  claim 2 , 
       characterized by that
 the clamping forces ( 55 ,  56 ) of the clamping rollers ( 43 ,  44 ) are produced by a pressure cylinder ( 57 ,  58 ). 
 
     
     
         15 . Roll-forming machine according to  claim 14 , 
       characterized by that
 the pressure cylinder ( 57 ,  58 ) is hydraulic. 
 
     
     
         16 . Roll-forming machine according to  claim 14 , 
       characterized by that
 the pressure cylinder ( 57 ,  58 ) is electrical. 
 
     
     
         17 . Roll-forming machine according to  claim 14 , 
       characterized by that
 the pressure cylinder ( 57 ,  58 ) is pneumatic.