Application of induction heating to control sheet flatness in cold rolling mills

a technology of induction heating and control sheet, which is applied in the field of cold rolling, can solve the problems of inability to provide rolled products, sections of rolled products being cut away and scrapped, and the strip edges are not easily prone to high tension

Inactive Publication Date: 2007-08-23
ARCONIC INC
View PDF22 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019] In one embodiment, the induction heating apparatus is configured to eliminate high tension on the strip edges that may be caused by the temperature gradient in the work rolls at the edges of the metal strip. In one embodiment, the induction heating apparatu

Problems solved by technology

Prior methods for forming aluminum strip have been unable to roll the strip uniformly over its entire width, and have not been able to provide rolled products being free of undesirable flatness undulations in the middle area, the edge area or the quarter area of the strip.
Unevenly distributed internal stress

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Application of induction heating to control sheet flatness in cold rolling mills
  • Application of induction heating to control sheet flatness in cold rolling mills
  • Application of induction heating to control sheet flatness in cold rolling mills

Examples

Experimental program
Comparison scheme
Effect test

examples

[0055]FIG. 4 graphically depicts a tension distribution across the rolled product that is provided by induction heaters corresponding to the edge diameter of a singular work roller, in comparison to the tension distribution provided by a similiarly prepared rolled product without induction heating. Referring to FIG. 4, the vertical axis represents the tension (pounds per square inch) that is measured in the rolled product, and the horizontal axis represents the width of the rolled product, wherein tension measurements were incrementally recorded from a flatness bar in which each zone of the sheet corresponded width of the rolled product. The tension distribution recorded in FIG. 4 is normalized to the nominal coiling tension, which may be on the order of 3000 Psi. The tension distribution depicted in FIG. 4 was produced by an Aluminum Association 3003 series aluminum alloy metal strip rolled by a single stand cold rolling mill from a thickness of approximately 0.035″ to 0.017″ at a ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Temperatureaaaaaaaaaa
Forceaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

A system for rolling metal sheet having a substantially uniform flatness including a rolling mill including a pair of work rollers for reducing the thickness of a metal sheet, an induction heating apparatus in close proximity to at least one roller, bending jacks corresponding to each of the rollers, and a cooling spray system in proximity to rollers; a flatness measuring device positioned to measure a differential in flatness of the metal sheet; and an mill control interface connected between the flatness measuring device and the rolling mill's actuators, in which the mill control interface is configured to actuate the induction heating apparatus, the bending jacks and the cooling spray system to substantially eliminate flatness differentials is the metal sheet's flatness. The induction coil heating apparatus is configured to eliminate high tension on the strip edges caused by the temperature gradients in the work rolls at the edges of the metal strip.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] The present invention claims the benefit of U.S. provisional patent application 60 / 774,974 filed Feb. 17, 2006 the whole contents and disclosure of which is incorporated by reference as is fully set forth herein.FIELD OF THE INVENTION [0002] In one embodiment, the invention relates to cold rolling, and a method of improving sheet flatness in cold rolled metal sheets utilizing induction heating. BACKGROUND OF THE INVENTION [0003] Strip products composed of metal, such as aluminum, are typically rolled in four high or six high rolling mill stands. Prior methods for forming aluminum strip have been unable to roll the strip uniformly over its entire width, and have not been able to provide rolled products being free of undesirable flatness undulations in the middle area, the edge area or the quarter area of the strip. Unevenly distributed internal stresses resulting from the material being processed with prior methods typically result in ed...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B21B37/28
CPCB21B27/106B21B37/28B21B37/32B21B37/42B21B2267/18B21B38/02B21B2003/001B21B2027/103B21B2263/04B21B37/44
Inventor BECK, WILLIAM J.GARIMELLA, SRINIVAS S.GLOBIG, MICHAELPUDA, MARK E.RINGLE, MICHAEL A.SCHULTHEIS, FREDERIC J.VERNON, NEAL
Owner ARCONIC INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap