บทบาทและความส าคัญของเทคโนโลยี การขึ้นรูปเหล

บทบาทและความสาคัญของเทคโนโลยี
การขึน้ รู ปเหล็ก High Strength Steel (HSS)
ในอุตสาหกรรมชิ้นส่ วนยานยนต์
Role and Importance of Forming Technology of High
Strength Steel (HSS) for Automotive Part Making
Industry
ผศ. ดร. วิทรู อุทยั แสงสุข
Asst. Prof. Vitoon Uthaisangsuk, Dr.-Ing.
ภาควิชาวิศวกรรมเครื่ องกล มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
Department of Mechanical Engineering,
King Mongkut’s University of Technology Thonburi
Safety Structure & Light Weight
Aero Dynamic Shape
Green Environment
Source: http://www.metalformingfacts.com/industry-news/developments-gigapascal-strength-steels.html
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A range of 4.5 - 6 % reduction of fuel consumption per 10 % weight
saving and 0.15 - 0.7 l/100 km fuel consumption reduction per 100 kg
weight saving have been well reported.
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Source: http://articles.sae.org/12090
Source: http://autospeed.com/cms/title_Steel-Identification-Using-Hardness-Testing/A_109717/article.html
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5
Source: http:// www.metalformingmagazine.com
Strength
Light Weight
FSV
Performance
Passenger
Safety
Future Steel Vehicle (FSV) [2015-2020]
Source: http://www.metalformingfacts.com/industry-news/developmentsgigapascal-strength-steels.html
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Source: http://autospeed.com/cms/title_Steel-Identification-Using-Hardness-Testing/A_109717/article.html
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2012 Mercedes Benz E-Class Cabriolet
Source: http://mercedes-benz-blog.blogspot.com/2010/03/new-mercedes-benz-e-class-cabriolet_2785.html
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2011 Volvo V70 Body Structure
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Source: http://boronextrication.com/tag/list-of-vehicles-with-boron-and-uhss
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Source: http://www.autosteel.org/en/Research/Growth%20of%20AHSS.aspx
Optimized panel thickness for reduced body mass
Source: http://www.grm-consulting.co.uk/wp-ontent/uploads/2010/12/TRUPRODUCT_ford_fiesta_biw_results.png
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Source: http://autospeed.com/cms/title_Steel-Identification-Using-Hardness-Testing/A_109717/article.html
As material strength increases, forming process requires
modification due to the higher tensile strengths and
reduced elongations.
Source: World Auto Steel., 2009, Advanced High Strength Steel (AHSS) Application Guidelines Version 4.0
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Source: World Auto Steel., 2009, Advanced High Strength Steel (AHSS) Application Guidelines Version 4.0
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Source: World Auto Steel., 2009, Advanced High Strength Steel (AHSS) Application Guidelines Version 4.0
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Steel grades available for Future Steel Vehicle
Source: World Auto Steel.,
2009, Advanced High
Strength Steel (AHSS)
Application Guidelines
Version 4.0
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High Strength = High Forming Force
Source: World Auto Steel., 2009, Advanced High Strength Steel (AHSS) Application Guidelines Version 4.0
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Forming force for high strength steels
Forming force / kN
Forming force = ram force – blank holder force
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Source: ThyssenKrupp Steel Europe
Forming forces for high strength steels
Required drawing energy / J
For example: B-pillar reinforcement
Drawing depth = UT
Energy demand
for embossing
and stepping
Drawing depth / mm
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Source: ThyssenKrupp Steel Europe
Source: IFU
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Stretched Edge Cracking
Buckles
Source: IFU
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Springback effect in high strength steels
Source: Chongthairungruang et al., 2013, Materials and Design, Vol.50, pp. 253-266.
World Auto Steel., 2009, Advanced High Strength Steel (AHSS) Application Guidelines Version 4.0
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Source : World Auto Steel., 2009, Advanced High Strength Steel (AHSS) Application Guidelines Version 4.0
Chen, P. and Koç, M., 2007, J Mat Proc Tech, Vol. 190, pp. 189-198.
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Source: World Auto Steel., 2009, Advanced High Strength Steel (AHSS) Application Guidelines Version 4.0
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Die design & materials
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Recommendations for tool materials and coating
inserts:
inserts:
Restriking
Source : IFU
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Recommendations for tool hardening process
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Tool materials for deep drawing and cutting of sheet
metals with tensile strength of Rm > 650
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Die face design (Die face compensation)
Delivered in drawing or, most often
nowadays in CAD format.
Die face design specifies the geometry
of the die surface for each station
considered.
Source: http://www.metalformingmagazine.com/assets/issue/images/2013/05/NewInDieDesign/DieDesign-B.jpg
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Outcomes
1. Design Concept & Die Production – Guideline - Standards - Procedures
2. Die Production & Quality Control Guideline for internal use
3. Die & Part samples with company quality standard acceptance.
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Die tryout
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Guideline
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