Method and system for varying the gage of metal strips
a technology of metal strips and gage, which is applied in the direction of metal rolling, metal rolling stands, manufacturing tools, etc., can solve the problems of reducing the amount of weight required, and concentrating stress of subsequent bending, etc., and achieves cost-effective effects
Inactive Publication Date: 2017-09-21
METALSA SA DE CV
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Benefits of technology
The patent is about a method for making metallic strips that can be used in the manufacturing of commercial vehicle side rails. The method allows for the creation of a variable thickness profile, which improves the strength and flexibility of the side rails. This allows for better performance and durability of the commercial vehicles.
Problems solved by technology
The main disadvantage that these blanks for some later manufacturing processes is that subsequent bending imparts concentrated stress zones over the welds that could affect the final component characteristics.
Additionally, the welding precision required for the attachment of tailor-welded blanks have cost implications, since an inaccurate welding operation could have severe performance implications for the final component.
A disadvantage of this process is that each rolling step can only reduce thickness in a small percentage of the total thickness, therefore, significant number of rollers are required to achieve considerably high thickness reductions, as the ones needed in the commercial vehicle industry.
Some other attempts have been made to achieve variable thickness in steel materials, but none has been found suitable the amount of weight reduction required the manufacturing of steel side rails for the transportation industry.
Method used
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[0017]Various embodiments of the invention are described with reference to the attached drawings wherein like reference numerals are used for like parts throughout the various views. The drawing figures are not necessarily to scale. Certain features of the invention may be shown exaggerated in scale or in somewhat schematic form. Likewise, some details of conventional elements may not be shown for the sake of clarity and conciseness.
[0018]The preferred embodiments of the invention refer to a method and system for varying the gage of a strip. The invention is susceptible to embodiments of different forms. Specific embodiments of the invention are shown in the drawings, and will be further described, with the understanding that the specification will be considered as an exemplification of the principles of the invention and it is not intended to limit the invention to that as illustrated and described herein. It will be fully recognized that the different teachings of the embodiments ...
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Abstract
A variable thickness process and system for processing steel strips to obtain a profile with at least two different thicknesses along its width which includes at least one heating step, and at least one stretching step and one straightening step.
Description
TECHNICAL FIELD[0001]The present invention relates to a method and system for obtaining metal strips characterized by having at least two different thicknesses along its width. The method combines manufacturing processes such as stretch forming, rolling, flattening and localized heating in order to vary the metal strips thickness at specific areas. Particularly, the present method refers to efficiently and effectively achieve a thickness reduction in particular areas of a metal strip.BACKGROUND OF THE INVENTION[0002]Lighter structural components have become increasingly important in the transportation industry. Higher standards and regulations have demanded structural components manufacturers to increase their competencies in the use of alternative methods and materials which can achieve significant weight reduction without sacrificing safety and performance. Specifically in the manufacture of chassis frames components, such as side rails, steel has proven to be the material with be...
Claims
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IPC IPC(8): B21D35/00B21D1/05B21D5/14
CPCB21D35/006B21D5/14B21B31/18B21D1/02B21D1/05B21D1/00B21D25/00B21D17/04B21H8/00
InventorGONZALEZ FANFALONE, FRANCISCO JAVIERCARDENAS FLORES, PEDRO
OwnerMETALSA SA DE CV