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Content about CPF (Center for Precision Forming) - Page 2
- From The Fabricator
R&D Update: Practical use of servo hydraulic cushions in stamping operations
- By Ali Fallahiarezoodar, Darrell Quander Jr., Pratik Mehta, and Taylan Altan, Ph.D.
- Mar 15, 2017
- Bending and Forming
- Article
In deep drawing, with or without draw beads, the sheet metal blank is restrained at the periphery of the die by the blank holder force (BHF). The relative motion between the punch and the die forces the metal to flow into the die cavity (see Figure 1). The quality of the formed part is determined...
- From The Fabricator
R&D Update: Practical methods for estimating formability of sheet materials
- By Ali Fallahiarezoodar, Berk Aykas, David Diaz-Infante, Dr., and Taylan Altan, Ph.D.
- Jul 7, 2016
- Bending and Forming
- Article
Formability is the ability of a sheet material to deform without failure or fracture. Information on formability helps process and tool design engineers predict failure during analysis of sheet metal forming processes for tool design. Formability information also is used to evaluate...
- From The Fabricator
R&D Update: Lightweighting in the automotive industry using sheet metal forming, Part 1
- By Ali Fallahiarezoodar and Taylan Altan, Ph.D.
- Jan 7, 2016
- Bending and Forming
- Article
The Ohio State University's Center for Precision Forming provides an overview of design considerations and materials used in lightweighting in the automotive industry in the first part of a two-part series.
- From The Fabricator
R&D Update: Flow stress data and FE simulation
- By Ali Fallahiarezoodar, Taylan Altan, Ph.D., and Zeming Yin
- Nov 30, 2015
- Bending and Forming
- Article
Finite element (FE)-based computer software commonly is used in the sheet metal forming and stamping industry for die design and for predicting metal flow and thinning in the formed part. It is a useful tool for predicting and preventing forming defects such as fracture and wrinkling. However,...
- From The Fabricator
R&D Update: Determining flow stress data by combining uniaxial tensile and biaxial bulge tests
- By Ali Fallahiarezoodar and Taylan Altan, Ph.D.
- Oct 8, 2015
- Bending and Forming
- Article
In the sheet metal forming industry, finite element (FE) simulation is an important tool for fabricators predicting metal flow, optimizing geometry, and selecting process variables before developing new dies. The accuracy of the simulation results depends highly on the accuracy of the input...
- From The Fabricator
R&D Update: Heat generation in forming of AHSS
- By Ali Fallahiarezoodar, Ruzgar Peker, and Taylan Altan, Ph.D.
- Mar 10, 2015
- Bending and Forming
- Article
Advanced high-strength steel (AHSS) materials are multiphase steels that contain martensite, bainite, and/or retained austenite. The use of AHSS materials in the automotive industry is increasing every day, because these steels provide strength and satisfy functional requirements at reduced weight....
- From The Fabricator
R&D Update: Examining lubricant performance in forming of AHSS
- By Ali Fallahiarezoodar, Taylan Altan, Ph.D., and Suraj Appachu
- Feb 5, 2015
- Bending and Forming
- Article
Lubrication plays an important role in stamping, as it reduces friction at the tool-workpiece interface. Reducing that friction also reduces die and tool wear in large-volume production, which in turn increases tool life. It also allows smoother flow of the sheet material into the die cavity and...
- From The Fabricator
R&D Update: Lubrication and galling in stamping of galvanized AHSS - Part III
- By Taylan Altan, Ph.D.
- Apr 15, 2008
- Bending and Forming
- Article
Forming of galvanized AHSS involves higher contact pressures at the tool-workpiece interface compared to forming mild steel. Under these severe interface conditions, improper selection of lubricants, tool materials and tool coatings may result in high scrap rates and galling in stamping production.. Based on SDT results, polymer-based lubricant with EP additives and water-soluble DFL were found to be most effective, Synthetic lubricants showed also reasonably small frictional responses with a PVD coated die in forming GA coated strips.
- From The Fabricator
Blanking developments
- By Taylan Altan, Ph.D.
- Sep 11, 2007
- Bending and Forming
- Article
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...
- From The Fabricator
Blanking developments - Part I
- By Serhat Kaya and Taylan Altan, Ph.D.
- Jul 10, 2007
- Bending and Forming
- Article
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.
- From The Fabricator
Stamping research gains support
- By Taylan Altan, Ph.D.
- Jun 12, 2007
- Bending and Forming
- Article
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.
- From The Fabricator
Servo press forming applications
- By Taylan Altan, Ph.D.
- May 8, 2007
- Bending and Forming
- Article
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.
- From The Fabricator
R&D Update: Servo press forming applications - Part I
- By Taylan Altan, Ph.D.
- Mar 13, 2007
- Bending and Forming
- Article
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.
- From The Fabricator
R&D Update: Hot-stamping boron-alloyed steels for automotive parts - Part I
- By Taylan Altan, Ph.D.
- Feb 13, 2007
- Bending and Forming
- Article
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.
- From The Fabricator
R&D Update: Hot-stamping boron-alloyed steels for automotive parts - Part II
- By Taylan Altan, Ph.D.
- Jan 18, 2007
- Bending and Forming
- Article
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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