Apparatus for continuously leveling thin metal strip
AssigneeBWG Bergwerk- und Walzwerk-Maschinenbau GmbH
InventorsOskar Noe, Andreas Noe, Rolf Noe
Life of this patent
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Abstract
The stretch leveling or stretch-bend leveling of aluminum or stainless steel strip of a thickness of 0.1 to 0.5 mm is carried out following a measurement of strip nonplanarity or strip profile by regulating the stretch in the stretch leveler or the contour of a roller thereof or both and/or by regulating the depth of penetration or degree of bending by the stretch-bend rollers. The tension in the strip just before coiling is varied in response to measurement of the thickness of the strip across the width, thereby optimizing the leveling and surface qualities of the strip.
Claims5
An apparatus for continuously processing thin metal strip, comprising:
- an upstream bridle traversed by a continuous thin metal strip and exerting a braking force thereon;
- a downstream bridle spaced from said upstream bridle and advancing said strip to apply tension to said strip;
- a coiler downstream of said downstream bridle for receiving said strip and winding said strip up in a coil;
- a stretch-bend leveler between said upstream bridle and said downstream bridle and having rolls engaging said strips from opposite sides and penetrating to respective depths into a planar path of said strip, said rolls having respective sags;
- a correcting roll around which said strip extends between said upstream bridle and said downstream bridle and having a variable curvature over a length thereof;
- a measuring station upstream of said upstream bridle for measuring at least one parameter of the thin metal strip selected from unplanarity of the strip and the strip profile;
- and
- control means connected to said measuring station for maintaining an optimum setting of said parameter by continuously varying selectively:
- at least one of a plurality of characteristics of said stretch-bend leveler selected from said tension of said strip in the stretch-bend leveler, said depths and said sags,
- said curvature by changing the radius of curvature of said roll, and
- varying said tension of said strip immediately upstream of said coiler
- in response to the measurement of said parameter.
Dependencies are inferred from the claim text.