Dr. Taylan Altan

Director
Center for Precision Forming
339 Baker Systems
1971 Neil Ave.
Columbus, OH 43210-1271


Phone: 614-292-9267
www.cpforming.org
Contact via email

Servo press forming applications Part I

March 13, 2007

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A servomotor gives a press slide motion flexibility in terms of accurate speed, motion, and position control. This flexibility produces infinite slide motion variations that may improve part quality and operations such as painting and assembly during one press stroke.

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Steel strength diagram

Hot-stamping boron-alloyed steels for automotive parts - Part I

February 13, 2007

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Hot-stamped parts are being used increasingly in cars in Europe and North America. Ultrahigh-strength steels, like boron alloys, which meet automotive safety and crash requirements, are difficut to form with cold stamping, so hot stamping with die quenching has been applied.

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FE Simulation Table

Hot-stamping boron-alloyed steels for automotive parts - Part III

February 13, 2007

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To accurately model the hot-stamping process, FE simulation needs to account for the mechanical, thermal, and microstructural changes in the workpiece.

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Hot stamping diagram

Hot-stamping boron-alloyed steels for automotive parts - Part II

January 18, 2007

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Compared with cold-formed parts, hot-stamped parts provide better formability at high temperatures and exhibit no springback on the final part.

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BHF-chart

Multipoint-control die cushion systems for stamping complex parts

November 7, 2006

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In deep drawing of complex, asymmetrical parts such as stainless steel kitchen sinks, blank holder force (BHF) needs to be controlled locally to regulate the flow of the sheet metal. An MPC blank holder system allows this control by placing individually programmable cushion pins around the blank perimeter, with an appropriate BHF selected at each pin location.

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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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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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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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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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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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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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Sheet hydroforming diagram

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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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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