TH32481B - Methods and devices for the use of particularly adaptive tensile stress distribution In the edge of the cold rolled metal strip - Google Patents

Abstract

DC60 This invention deals with methods and devices for applying stress distribution. adjustable pull Especially in the edge area during cold rolling of metal strips (16), especially metal foils. In order to reduce the risk of excessive tensile build-up and cracking at the edge of the band, which can lead to negative consequences of band cracking and reduced production, and in order to improve the surface of the Bands and their planeness Even at the bar movement speed relatively high It also reduces the strip trim width. To achieve these purposes, at least one or a combination of the following two methods is used: a) Separation of lubrication and cooling. of working rolling by lubrication on the running side and cooling on the discharge side; b) creating an additional effect of the band edges using hot edge spraying In particular, by spraying (21) different temperature rolling oils in different areas c) the use of cross-sectional schemes. Special type of working roller (12,12') in the area of the edge of the bar. which will create material accumulation some during molding Such deposition creates a longer band edge in subsequent passages, thereby reducing the risk of excessive tensile stress build-up. The invention involves methods and devices for applying the normal tensile stress distribution, specifically stated at the edges. during the cold winding of the metal strip (16), especially the metal foil. in order to reduce the risk of excessive tensile build-up and cracking at the edge of the band, which may lead to the detrimental effect of band cracking and reduced production; and to Improve the texture of the bar and its planeness. Even at the bar movement speed relatively high It also reduces the strip trim width. To contain these purposes, at least one or a combination of the following two methods is used: a) separating lubrication and cooling; of working rolling by lubrication on the running side and cooling on the discharge side; b) creating an additional effect of the band edges using hot edge spraying In particular, by spraying (21) different temperature rolling oils in different areas c) the use of cross-sectional schemes. Special type of working roller (12,12') in the area of the edge of the bar. which will create material accumulation some during the molding Such deposition creates a longer band edge in subsequent passages, thereby reducing the risk of excessive tensile stress build-up.

Claims (7)

1. Method for applying an adaptive tensile stress distribution in the edge area during cold rolling of the metal strip for the purpose of reducing the risk of the preparation with excess tensile stress. And the risk of edge breakage in the bar This can have a negative effect that occurs after the rupture of the bar. And therefore production will be reduced. And for the purpose of improving the strip texture and its flatness. Equally at a relatively high speed of the band. And reduction of the width of the cut-off edge of the strip consisting of a procedure of a) the separation of lubrication and cooling of the operating roller by lubrication on the side Added and cooling on the discharge side The adjustment consists of an additional step of b) additional indentation of the edge banding by Spraying hot edges by spraying oil for C) Using a working roller with a special cross-section profile in the area of the strip edge. Which special framework is Freedom from hot edge spraying for partial material preparation during rough passes. Resulting The longer edge of the band subsequently passes and inhibits the risk of the normal preparation of the tensile stress. 2. Method according to claim 1, where the reduction in the larger diameter of the working roller is Performed at the edge as some of the diameter increases during shaping by giving Induction hot 3. Method according to claim 1, where the tensile stress distribution of the bar is altered by Concave-bendable rollers or rollers that bend in such a way that the tensile stress of the bar is It is reduced at the edge of the strip and is made up in the center of the strip. 4. Method according to claim 1, where in passing the rough In which the material is prepared at the edge of the strip by Spray the edges with high viscosity lubrication. 5. A device for developing an adaptive tensile stress distribution in the edge area during drawing. Cool metal bar The device consists of a system of at least one spray nozzle (11,11 \ ') on the added side. For the use of lubricants and routes for cooling the cylindrical tanks of the operating rollers on the discharge side where a double nozzle system (11,11 \ ') is connected to separate the delivery path. A spraying medium (19,19 \ ') for spraying a lubricant in the form of oil for the roller with different temperatures in Distinct regions (10,10 \ ') of each service roller (12) and where each working roller (12,12 \') has a special cross-section (13,13 \ ') with an increased diameter. up At the tip of the working roller (12,12 \ ') for the purpose of lengthening the curled strip edge too Simultaneous decrease in tensile stress and a decrease in strip fiber length in the region close to the edge of the strip. 6. Method for claim 1 consisting of a yawed roller (15) that is bent, concave or made. It is bent in the guide (14) and is positioned between the guide rollers (17) to vary Spread the tension bar (16) before it enters the roller stand (20). 7. Method according to claim 5, where on the added side of the roller stand (20), where it will have a route (21) for the direct use of the addition to the rolled bar (16) and On the released side of the operating roller (12,12 \ '), where it provides a path (22) for cooling the working roller cylindrical tank and, appropriately, an additional path (23,23 \'). For removing lubricants The resulting spray was applied onto the coiled strips (16) both from the top of the strip and the bottom of the strip with the combined spraying medium. 8 Method according to claim 5, where it will have a device which removes the coolant on the released side of the location (20).