Taylan Altan, Ph.D.

Professor and Director, ERC/NSM
The Ohio State University
1971 Neil Ave.
Columbus, OH 43210


Phone: 614-292-5063
www.cpforming.org
Contact via email

Warm forming magnesium, aluminum tubes

October 3, 2006

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Research shows that in forming lightweight materials such as aluminum and magnesium alloys, the formability increases as the temperature increases, especially in the range from 200 degrees C to 300 degrees C (392 degrees F to 572 degrees F).1-5 The Center for Precision Forming (CPF, formerly...

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Warm forming of stainless steels - Part II

August 8, 2006

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The ERC/NSM conducted experiments using round cup tooling to determine the influence of temperature on the limiting draw ratio – the largest draw ratio of the blank-to-cup diameter that can be drawn successfully.

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Warm forming of stainless steels - Part I

July 11, 2006

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To prevent martensitic transformation in stainless steel during drawing operations, warm forming has been explored. In experiments, warm forming eliminated intermediate annealing operations and substantially increased limiting draw ratio values.

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R&D Update: Evaluating dry film lubricants for automotive applications Part III

November 8, 2005

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In recent studies, dry-film lubricants have been shown to give better lubrication conditions when compared to oil-based liquid lubricants. This factor, as well as savings in the amount of lubricant used, has helped increase the use of dry-film lubricants in the automotive industry for forming of aluminum and high-strength steel stamped parts

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R&D Update: Air-assisted forming of aluminum alloy for automotive components

August 9, 2005

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Reducing weight while maintaining or improving functional requirements is one of the major goals of automotive design and manufacturing, as it decreases fuel consumption and improves structural design. As a result of these considerations, the use of aluminum alloys in car manufacturing continues to increase, not only in body panels but also in structural, power train, and suspension components.

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Hydroforming tapered engineered tubes

June 8, 2004

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Hydroforming often results in localized thinning. Using engineered tubes—tubes that have a thicker wall where the tube is most prone to thinning—can result in a stronger finished component.

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Using finite element analysis to roll-form tubes

October 9, 2003

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Roll forming is a common method for producing steel tubes. It is a continuous process in which a strip is guided through several sets of rolls that form the strip into the desired shape. After the final shape is achieved, tube edges are welded together to form a closed section. After the welding operation, the tube is sized through another set of rolls to obtain the required diameter.

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R&D Update: Predicting springback in air bending, straight flanging

October 9, 2003

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Editor's Note: This column was prepared by the staff of the Engineering Research Center for Net Shape Manufacturing (ERC/ NSM), The Ohio State University, Professor Taylan Altan, director.Air bending and straight flanging are the most prevalent types of bending in sheet metal forming. Predicting...

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R&D Update: Using binder force control, force modulation, to improve part quality, stamping efficiency

August 28, 2003

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Editor's Note: This column was prepared by the staff of the Engineering Research Center for Net Shape Manufacturing (ERC/ NSM), The Ohio State University, Professor Taylan Altan, director.Binder, or blank holder, force control is an important variable in the stamping process. Constant blank holder...

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R&D Update: Dieless NC forming

June 12, 2003

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Dieless NC forming or incremental sheet forming is a numerically controlled incremental process that can produce complex shapes from various materials. The process is based on localized plastic deformation in the sheet metal blank. It was developed as an alternative manufacturing method to prototype sheet metal stampings and produce panels in small lot sizes.

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R&D Update: Sheet hydroforming in automotive applications

April 15, 2002

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Sheet hydroforming can be used in the automotive industry for forming alloys with low formability and prototype applications, among other handy applications.

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R&D Update: Design rules for forming aluminum stampings—Part 1

February 2, 2002

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This brief overview discusses rules for aluminum stamping involving: die clearance, die radius, punch radius, minimum bend radii, round cups, rectangular box parts, and overhang limit.

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R&D Update: Design rules for forming aluminum stampings—Part 2

February 2, 2002

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Figure 1:Addendum types enable or improve the stamping of a sheet metal part. A draw wall, for example, connects the trim line and the punch opening line.Editor's Note: This column was prepared by the staff of the Engineering Research Center for Net Shape Manufacturing (ERC/ NSM), The Ohio State...

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R&D Update: The importance of the n value in sheet forming

October 11, 2001

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Strain hardening is represented by the exponent n in the flow stress equation, which approximates the relation between true stress and true strain during plastic deformation of a metal. The constant n plays a crucial role in sheet metal forming, and this brief article describes its effects.

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Hydroforming system

Successful tube hydroforming: Watching parameters, accurately simulating the process yield good results

June 15, 2001

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A typical tube hydroforming system is shown in Figure 1. Within this system, a host of factors must be taken into account, from starting tube geometry and material properties to the quality of the final part (such as thickness distribution and dimensional accuracy).

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