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
Shear zone geometry characteristics

Blanking developments

September 11, 2007

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Editor's Note: This is Part IIIof a three-part series on blanking developments. Part I, which appeared in the July issue, focused on fineblanking and tool design. Part II, which ran in the August issue, covered fineblanking part and process design guidelines.This column was prepared by Serhat Kaya,...

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Blanking developments - Part III

September 11, 2007

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During high-speed blanking, press stroking rate and punch speeds, are higher than in conventional blanking. As a result, the shear zone has a higher strain rate, which affects a workpiece's sheared surface temperature and the tool surface.

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Fastblanking cycle diagram

Blanking developments - Part II

August 8, 2007

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Fineblanking in various forms is increasingly becoming accepted by the automotive industry for producing sheet metal components with smooth edges that don't require additional finishing operations.

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Ejector counter punch

Blanking developments - Part I

July 10, 2007

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Fineblanking allows the production of sheet metal components with smooth edges in a single press stroke. This column discusses basic terminology and the principles of this process.

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Stamping Diagram

Stamping research gains support

June 12, 2007

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Global competition continues to force the metal forming industry to reduce costs, improve technology, and increase productivity. With these trends in mind, the Ohio State University (OSU) and Virginia Commonwealth University (VCU) established in June 2006 the Center for Precision Forming to focus on the needs of the metal forming industry.

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Grind die diagram figure 2

Servo press forming applications

May 8, 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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R&D Update: Servo press forming applications - Part III

May 8, 2007

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This column discusses several applications of servomotor-driven mechanical presses for forming at room temperature and at elevated temperatures.

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R&D Update: Servo press forming applications - Part II

April 10, 2007

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Servo presses are classified into two main types based on their drive systems: direct drives with high-torque, low-speed servomotors, or low-torque, high- speed servomotors.

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R&D Update: 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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R&D Update: 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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R&D Update: 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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R&D Update: 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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R&D Update: Multipoint-control die cushion systems for stamping complex parts - Part II

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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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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