Rolling device and the method thereof

Abstract

A rolling device for three-dimensional curved surface forming or thin sheet rolling of a sheet metal, comprising a forming roll ( 1 ), a supporting mechanism, an adjusting mechanism and a driving mechanism. The forming roll ( 1 ) comprises an upper forming roll ( 1 a ) and a lower forming roll ( 1 b ); the supporting mechanism is a multi-point supporting mechanism ( 2 a ) or an overall supporting mechanism ( 2 b ) for supporting the forming roll; the adjusting mechanism is a multi-point shape adjusting mechanism ( 3 ) and/or an overall displacing mechanism for adjusting the shape and/or relative height of the forming roll ( 1 ); and the driving mechanism applies a torque to one or two ends of the upper forming roll ( 1 a ) and/or the lower forming roll ( 1 b ). The present invention also provides a method for sheet rolling by using the rolling device. The rolling device and rolling method can achieve three-dimensional curved surface rolling or thin sheet rolling of a sheet metal simply, quickly and at a low cost.

1 . A rolling device, comprising a forming roll, a supporting mechanism, an adjusting mechanism and a driving mechanism, characterized in that,
 the forming roll comprises an upper forming roll and a lower forming roll, which have small diameters and are easy to be bending deformed;   the supporting mechanism is a multi-point supporting mechanism or an overall supporting mechanism for supporting the forming roll;   the adjusting mechanism is a multi-point shape adjusting mechanisms and/or an overall displacing mechanism, capable of adjusting the shape and/or relative height of the forming roll;   the driving mechanism is capable of applying a torque to one or two ends of the upper forming roll and/or the lower forming roll, so that the upper forming roll and/or the lower forming roll are/is caused to rotate, and whereby a sheet metal is passed through a roll gap between the upper forming roll and the lower forming roll and is roll formed.   
     
     
         2 . The rolling device according to  claim 1 , characterized in that,
 the forming roll is a rotating body having a generatrix of a straight or curved line;   the number of each of the upper forming roll and the lower forming roll is one or more.   
     
     
         3 . The rolling device according to  claim 1 , characterized in that,
 the upper forming roll and/or the lower forming roll are/is composed of two roll segments, which are capable of being rotated in opposite directions with different speeds, in opposite directions with the same speed, in the same direction with different speeds or in the same direction with the same speed.   
     
     
         4 . The rolling device according to  claim 3 , characterized in that,
 a centering mechanism is arranged between the two roll segments, for fixing a point on the sheet metal, so that the sheet metal is incapable of being moved as a whole, but only capable of being rotated about the point.   
     
     
         5 . The rolling device according to  claim 1 , characterized in that,
 the adjusting mechanism changes a deflection or relative height of the forming roll according to need before the sheet metal is passed through the roll gap and is roll formed; or changes the deflection or relative height of the forming roll in real time according to need during a process in which the sheet metal is passed through the roll gap and is roll formed.   
     
     
         6 . The rolling device according to  claim 1 , characterized in that,
 the overall supporting mechanism is a flexible supporting mechanism for providing a full-length support for the forming roll, and the flexible supporting mechanism has a sectional dimension larger than that of the forming roll, but is capable of being flexurally deformed;   the adjusting mechanism is a multi-point shape adjusting mechanism for performing a multi-point shape adjustment to the forming roll through the flexible supporting mechanism, or it further comprise an overall displacing mechanism for adjusting the relative height of the forming roll.   
     
     
         7 . The rolling device according to  claim 1 , characterized in that,
 the overall supporting mechanism is a rigid supporting mechanism for providing a full-length support for the forming roll, the rigid supporting mechanism has a sectional dimension much larger than that of the forming roll, and does not undergo a deformation or only undergoes a deformation in a very small degree during a rolling process;   the adjusting mechanism is an overall displacing mechanism for adjusting the relative height of the forming roll.   
     
     
         8 . The rolling device according to  claim 1 , characterized in that,
 the overall supporting mechanism is kept in surface contact with and sliding fit to the forming roll, and an oil groove is formed on a contact surface between the overall supporting mechanism and the forming roll, and additionally, one or more oil passages opening from the outside to the contact surface are formed in the overall supporting mechanism.   
     
     
         9 . The rolling device according to  claim 1 , characterized in that,
 the driving mechanism further comprises at least one driving roll, and the forming roll is driven by the driving roll, the driving roll is located between the supporting mechanism and the forming roll, the supporting mechanism is kept in surface contact with and sliding fit to the driving roll, and the driving roll is kept in line contact with and rolling fit to the forming roll.   
     
     
         10 . The rolling device according to  claim 1 , characterized in that,
 the rolling device further comprises one or more flexible holding mechanisms for supporting the sheet metal before and/or after a forming process, arranged in front of and/or behind the forming roll along a traveling direction of the sheet metal.   
     
     
         11 . The rolling device according to  claim 10 , characterized in that,
 the flexible holding mechanism comprises any one of a soft-shaft-based holding mechanism, a plurality of floating holding units and a multi-point holding mechanism with a function of height adjustment.   
     
     
         12 . A rolling method for sheet rolling by using the rolling device according to  claim 1 , characterized in that,
 the method comprises an adjusting step and a rolling step,   in the adjusting step, the adjusting mechanism adjusts the shape(s) or relative height(s) of the upper forming roll and/or the lower forming roll, so that the roll gap formed between the upper forming roll and the lower forming roll is non-uniformly distributed or uniformly distributed;   in the rolling step, a sheet metal is passed through the roll gap, and the sheet metal is roll formed by the upper forming roll and/or the lower forming roll.   
     
     
         13 . The rolling method according to  claim 12 , characterized in that,
 the adjusting step is executed before the rolling step, or the adjusting step and the rolling step are executed simultaneously.