TH40829B - Method for producing sheet metal strips - Google Patents

Abstract

DC60 (10/10/46) This invention relates to a method for producing sheet metal strips from cast metal by rolling in which the technique of edge rolling is combined with sheet rolling. The material for the sheet metal strip is first cast using a casting technique to produce a cast metal edge that is thicker at the center than at the sides, and the cast metal edge is fed into a continuous rolling machine in approximately one step, where during at least two edge rolling steps, the cast metal edge is divided into two symmetrical sections and maintained as two equal sections. These sections are spread out into the lateral region of the material to be rolled into a flat edge, which is the object for at least one sheet rolling step, so that a spreading ratio between the central dimensions of the cast metal edge and the width of the sheet of greater than 2.8:1 is achieved. This invention relates to a method for producing sheet metal strips from cast metal by rolling in which the technique of edge rolling is combined with sheet rolling. The material for the sheet metal strip is first cast using a casting technique to produce a cast metal edge that is thicker at the center than at the sides. Cast metal with a thicker center than sides and a cast metal edge shape is fed into a continuous rolling machine in approximately two stages, where, during at least two rolling stages, the cast metal edge is divided into two equal parts. These parts are spread out into the side areas of the material to be rolled into a flat edge, which is the object for at least one sheet rolling stage, so that a spreading ratio between the center dimensions of the cast metal edge and the sheet width of greater than 2.8:1 is achieved.

Claims (12)

1. A method for producing sheet metal strips from cast metal by rolling in which the technique of edge rolling is combined with sheet rolling is used. This method consists of: casting the material for the sheet metal strip to produce a cast metal edge that is thicker at the center than at the sides; continuously conveying the cast metal edge into the rolling machine, primarily during at least two edge rolling stages; arranging the rolling surface of the work rollers to include at least a central portion that is continuously curved in cross-section; dividing the cast metal edge into two symmetrical and equal sections; and spreading these two equal sections into the lateral region suitable for one sheet rolling stage so that the spreading ratio between the sheet width and the central dimension of the cast metal edge is greater than 2.8:1. 2. The method under claim 1, which includes incorporating casting in the vertical direction as a key element. 3. The method under claim 2, which includes additional input of the bar material to be rolled in each rolling stage, into the gap between the two finishing rollers. 4. The method under Claim 1, which includes additional casting in the horizontal direction as a primary aspect. 5. The method under claim 4, which includes additional input, involves feeding the bar material to be rolled in each rolling stage into the gap between the two work rollers. 6. The method under Claim 1, which includes additional casting at an inclined position. 7. The method under claim 1, which includes additional feeding of the bar material to be rolled in each rolling stage, into the gap between the two work rollers. 8. The method under claim 1, which includes additional rolling procedures for edge rolling and for sheet and strip rolling in separate rolling equipment. 9. The method under claim 1, which is further enhanced by the use of work rollers, where the rolling surface of the first work roller in each rolling step is significantly identical to the rolling surface of the second work roller in the same rolling step. 10. The method under Claim 1, which is further enhanced by the provision of the use of work rollers in which the shortest distance between the rolling surfaces of each pair of work rollers in each step of the edge rolling process is significantly uniform. 11. The method under claim 1, which incorporates additional mechanical contact area between the material to be rolled and the rolling surface of the work roller, is gradually increased during edge rolling. 12. The method under claim 1, which is further incorporated by providing a rolling surface of the work roller that is convex at its center in cross-section.