Method for producing profile sealing rings

Abstract

A method for producing profile sealing rings, in particular in a C-, V-, or U-shape, in which a profile strand ( 24 ) of definable cross-sectional shape is obtained from a band-shaped carrier part ( 2 ) by forming and the use of forming rolls ( 14, 16, 20, 22 ), the process of forming proceeding such that the profile strand ( 24 ) assumes at least part of an arc shape or spiral shape after forming.

1 . A method for producing profile sealing rings, in particular in a C-, V-, or U-shape, in which a profile strand ( 24 ) of definable cross-sectional shape is obtained from a band-shaped carrier part ( 2 ) by forming and use of forming rolls ( 14 ,  16 ,  20 ,  22 ), the process of forming proceeding such that the profile strand ( 24 ) assumes at least part of an arc shape or spiral shape after forming. 
     
     
         2 . The method according to  claim 1 , characterized in that sections of length of the profile strand ( 24 ), which is in an arc shape, are connected, in particular by welding, on the end side for forming the ring body of the profile sealing ring. 
     
     
         3 . The method according to  claim 1  or  2 , characterized in that the profile strand ( 24 ) is formed from the carrier part ( 2 ) which moves in the lengthwise direction in several forming stages ( 6 ,  8 ), the forming rolls ( 20 ,  22 ) which form the last forming stage ( 8 ) on the facing surfaces of the profile strands causing varied friction and/or deformation in order to produce the arc-shaped or spiral curvature of the profile strand ( 24 ) which emerges from this forming stage ( 8 ). 
     
     
         4 . The method according to  claim 3 , characterized in that the flat carrier part ( 2 ) is supplied by means of conveyor rollers ( 4 ) to the first forming stage ( 6 ) in which the first forming roll ( 14 ) with a convexly raised jacket part ( 28 ) and an opposite second forming roll ( 16 ) with a concavely depressed jacket part ( 30 ) shape the carrier part ( 2 ) into the preformed profile strand ( 18 ). 
     
     
         5 . The method according to  claim 4 , characterized in that at least one forming roll ( 14 ,  16 ,  20 ,  22 ) of the two forming stages ( 6 ,  8 ) can be adjusted in the working direction and transversely to the working direction to change the roll gap. 
     
     
         6 . The method according to  claim 5 , characterized in that the preformed profile strand ( 18 ) of the last forming stage ( 8 ) emerging from the first forming stage ( 6 ) is supplied by way of guide rollers ( 12 ) which can be adjusted transversely to the working direction. 
     
     
         7 . The method according to  claim 6 , characterized in that in the last forming stage ( 8 ) with a third forming roll ( 20 ) which has a convexly raised jacket part ( 32 ) and fourth forming roll ( 22 ) with a concavely depressed jacket part ( 34 ) the final profile shape is formed and by adjusting the peripheral velocities and the forming pressure in the last forming stage ( 8 ) the curvature of the emerging profile strand ( 24 ) is formed. 
     
     
         8 . The method according to  claim 7 , characterized in that the direction of curvature is chosen in order to obtain as desired a profile strand ( 24 ) with a profile which is opened to the inside or outside, relative to the arc shape, by shaping and positioning at least the fourth forming roll ( 22 ) and by setting the peripheral speed of at least one of the third ( 20 ) and fourth forming rolls ( 22 ). 
     
     
         9 . The method according to  claim 1 , characterized in that the profiled arc shape is formed from the band-shaped carrier part ( 2 ) by forming, using a pair of forming rolls ( 20 ,  22 ), in the manner of a rocking motion by continuous back-and-forth movement of the carrier part ( 2 ) along the pair of forming rolls ( 20 ,  22 ).