Fracture Forming Limits for Near Net Shape Forming of Sheet Metals

2019 ◽  
pp. 159-175
Author(s):  
J. P. Magrinho ◽  
M. B. Silva ◽  
P. A. F. Martins
Keyword(s):  
Sheet Metals ◽  
Forming Limits ◽  
Near Net Shape ◽  
Net Shape Forming

Mechanical Design for Accuracy of Linkage Servo Press for Near-Net Shape Forming

2018 ◽  
Author(s):  
Jing Tao ◽  
Huanan Qian ◽  
Suiran Yu
Keyword(s):  
Mechanical Design ◽  
Structure Design ◽  
Tolerance Allocation ◽  
Component Level ◽  
Eccentric Load ◽  
Servo Press ◽  
Near Net Shape ◽  
Net Shape Forming ◽  
Heavy Loads

The accuracy of machine is important to achieving highly accurate shapes. This paper is focused on mechanical design of highly accurate mechanical linkage servo press applicable to (near-)net shape forming. The effects of geometric errors, deformations under heavy loads and ram tilting are analyzed. A top-down design for accuracy approach is proposed: First, accuracy model for identification of inaccuracy-causing factors and their interlinking relations is developed. Then, based on this model, top accuracy index are decomposed and translated into structure design specifications at component level. Both analytic and simulation methods are employed for design for accuracy in aspects of dimensional and geometric tolerance allocation, stiffness synthesis and anti-eccentric load capability. A case study of mechanical design for accuracy of a six-linkage mechanical servo press is also presented to demonstrate and test the proposed design approaches.

Analysis of a Thixo-Lateral Forged Spindle from LTT C45, LTT C38 and LTT 100Cr6 Steel Grades

2014 ◽  
Vol 217-218 ◽  
pp. 347-354 ◽  
Author(s):  
Jokin Lozares ◽  
Zigor Azpilgain ◽  
Iñaki Hurtado ◽  
Iñigo Loizaga
Keyword(s):  
Mechanical Properties ◽  
Current Trend ◽  
Research Work ◽  
Raw Material ◽  
Key Factor ◽  
Steel Grades ◽  
Near Net Shape ◽  
Net Shape Forming ◽  
Near Net Shaping ◽  
Net Shaping

Due to the current trend in prices of raw material and their sources, near net shaping of mechanical components will become a key factor for the companies to get the desired competitiveness. Semisolid metal (SSM) forming is one of those near net shape forming techniques revealing a high potential to reduce material as well as energy consumption compared to conventional process technologies. Thus, the aim of this research work is to demonstrate the above by manufacturing a steel commercial automotive spindle by thixo-lateral forming from three different steel grades. The starting material, the microstructure and mechanical properties are analysed along the article. Material savings of 20% have been reported together with a substantial decrease of the forming forces. In addition, great mechanical properties have been achieved which brings the process closer to the desired final industrial application.

Manufacture of Aerospace Components With Pressure Welding

2010 ◽  
Author(s):  
Ho-Sung Lee ◽  
Jong-Hoon Yoon ◽  
Young-Moo Yi
Keyword(s):  
Attitude Control ◽  
Pressure Welding ◽  
Work Pressure ◽  
Welding Technology ◽  
Liquid Phases ◽  
Metallurgical Bonding ◽  
Suitable Amount ◽  
Near Net Shape ◽  
Net Shape Forming ◽  
Microscopic Deformation

Pressure welding technology is a solid state bonding process and generally involves heating the metal surfaces and then applying a suitable amount of axial pressure. In this state the metal components being joined undergo only microscopic deformation and the joining region is homogeneous and complete metallurgical bonding is possible without secondary materials or liquid phases. In the present work, pressure welding of titanium alloys has been investigated to fabricate several aerospace components with various complex configure. The result shows that the pressure welding method has been successfully applied with blow forming for near net shape forming of aerospace components, including high pressure tank for attitude control of spacecraft, and other lightweight structural panels.

scholarly journals The Effects of Lubrication on the Press Forming Limits of Sheet Metals

1967 ◽  
Vol 10 (37) ◽  
pp. 188-196 ◽  
Author(s):  
Kiyota YOSHIDA ◽  
Kunio MIYAUCHI ◽  
Hiroshi KOMORIDA
Keyword(s):  
Sheet Metals ◽  
Forming Limits ◽  
Press Forming ◽  
The Press

Characterization of Al3Fe Particle within Al-Al3Fe Functionally Graded Material Fabricated by Semi-Solid Forming

2005 ◽  
Vol 475-479 ◽  
pp. 1503-1506 ◽  
Author(s):  
Koichi Matsuda ◽  
Yoshimi Watanabe ◽  
Kazuhisa Yamagiwa ◽  
Yasuyoshi Fukui
Keyword(s):  
Volume Fraction ◽  
Functionally Graded ◽  
Shore Hardness ◽  
Graded Materials ◽  
Before And After ◽  
Graded Material ◽  
Near Net Shape ◽  
Net Shape Forming ◽  
Semi Solid

Near net shape forming of Al-Al3Fe functionally graded materials (FGMs) have been studied. FGM billets fabricated by a centrifugal method were extruded under the condition of a mixture of molten Al eutectic and solid Al3Fe particles. Both distribution and profile of Al3Fe particles were characterized by and the variation of volume fraction of Al3Fe particles was observed. Shore hardness of the Al matrix was also measured to evaluate the strength of the FGM before and after the semi-solid forming associated with the character of distributed Al3Fe particles. It was confirmed that Shore hardness increased with increasing the volume fraction of Al3Fe particles and after the semi-solid forming than before. This was due to the fact that Al3Fe particles after the semi-solid forming became fine by shear stress introduced by liquid Al flow.

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