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7/27/2019 CPF Presentation
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CPF
Center for Precision Forming(www.cpforming.org)
Taylan Altan, Director (email: altan.1@osu.edu)
A short Review
July, 2011
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CPF
The Ohio State University (OSU) and have established theIndustry/University Cooperative Research Center (I/UCRC) on
Precision Forming (CPF) focusing on research needs of metal
forming industry.
Funding is provided by National Science Foundation (NSF) andmember companies.
CPF (www.cpforming.org) benefits from research conducted at
Engineering Research Center for Net Shape Manufacturing
(ERC/NSM www.ercnsm.org).
Introduction
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http://www.cpforming.org/http://www.cpforming.org/http://www.cpforming.org/http://www.cpforming.org/http://www.cpforming.org/http://www.cpforming.org/7/27/2019 CPF Presentation
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CPFObjectives
Improve existing metal forming processes/products and develop new
innovative processes, tooling and equipment.
Conduct projects in close collaboration with industry and transfer the
results to the member companies.
Train and educate engineers in the fundamentals and practice of metal
forming science and technology.
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CPFCurrent Members Aida- America Corp.
Boeing
EWI
Honda
ESI North America
General Motors Corp.
Interlaken Technology Corp.
POSCO (Korea)
IM Steel
Scientific Forming Technologies (SFTC) Corp.
IMRA America
Metalsa
JCI
Thixomat
Tyco
Labein
Cincinatti, Inc 4
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CPF
CPF 1.1: Elevated temperature stamping and hydroforming of Al, Mg and
Stainless Steel
Objective:
Develop guidelines for elevated temperature sheet forming (process optimization,
lubricant evaluation and Finite Element Modeling)
Warm deep drawing (in cooperation with AIDA Engineering, Ltd.)
Current Projects
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CPF
CPF 1.4: Investigation of springback in forming Advanced/High
Strength Steel (A/HSS)Objectives:
Determine the variation ofYoungs Modulus with deformation /strain
Predict and reduce springback in stamping A/HSS
Planned experiments (Tool concept)
1. Straight flanging
2. Stretch flanging
3. Shrink flanging4. Straight hat shape drawing and stretching
5. Curved hat shape drawing and stretching
Current Projects
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CPF
CPF- 2.1: Determination of room temperature properties of Al and steel
sheet materials under biaxial conditions
Develop a standardized tool design and procedure to determine flow stress,
anisotropy and formability under biaxial deformation
Objective:
Sheet bulge test
(Viscous Pressure Forming VPF)
Current Projects
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CPF
Hole
Modified Limiting Dome Height
(MLDH) Test
Formed sample
(OD = 14in, t0 = 0.034in)
CPF- 2.2: Determination of flow stress of Al and Mg sheet materials at
elevated temperaturesObjective:
Determine flow stress of sheet materials at elevated temperatures for the warm
forming process.
Inverse Analysis Technique
Current Projects
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CPF
CPF- 2.3: Investigation of tribological conditions in forming uncoated
and galvanized Advanced/Ultra High Strength Steels (A/UHSS)
Determine the effect of process parameters (interface temperature, pressure and
relative sliding speed) on galling / reduce galling
Objective:
Twist compression Test (TCT)
Current Projects
T
P
A
rm
Testing materials: DP 600 Bare with Lub A Testing conditions: P = 170 MPa & N= 8.9 RPM
Tool surface
Galling
Micrograph of galled surface
9( in coo peration with IRMCO)
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CPF
CPF - 4.1: Multi Point Control (MPC) die cushion and blank holder
technology in stampingObjective:
Develop an automated system to optimize the Blank Holder Force for robust
stamping
Proposed system for robust stamping using MPC
Current Projects
Die
Blank holder /
Binder
Individual hydraulic
cylinders for each
cushion pin
(Source: Mller Weingarten)
Location of cushion pins/
cylinders in the die
(cont inue)
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CPF
Parts formed with OSU software by USCAR (try-out reduced from 3 days to 3 hours)
Current Projects
Al 6111-t4 (t = 1 mm) BH210 (t = 0.81 mm) DP500 (t = 0.78 mm)
CPF - 4.1: Multi Point Control (MPC) die cushion and blank holder
technology in stamping (continue)
Sample parts [GM lift gate inner panel] with different materials and sheet thickness was formed in
the same die by simply adjusting the BHF.
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CPF
CPF- 4.2: Applications of Tube Hydroforming (THF) Technologies
Objective:
Utilize past R&D experience at OSU to assist interested companies in
introducing and/or improving the hydroforming technology
Current Projects
12General concept of Tube Hydroforming Process(Hydroforming of the T-shape part)
A.
B.
C.
D.
[Leitloff , 1997 ]
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CPF
New tasks under consideration
Cold and Warm Hydroforming of Al and Mg alloys
Simulation of Hot Stamping of Boron Steels
Precision /Flashless Forging of automotive components (for example
tie rods, pinion gears and bevel gears)
Prediction and reduction of residual stresses in machining and burnishing
(advanced FE analysis)
Micro-stamping for electronic applications (lead frames, CD drive
components, etc.)
Center for Precision Forming(CP-Forming-www.cpforming.org)
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