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Simulation of industrial cold forming processes
Communications in Applied Numerical Methods, 1987AbstractA microcomputer‐based system for the simulation of cold metalforming processes is described. The simulation uses a nonlinear elastic–plastic finite element method developed for use on a 16‐bit microcomputer. The suitability of such a system is demonstrated by reviewing its application to industrial forming processes such as heading and ...
A. A. M. Hussin +3 more
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Energy Evaluation of Cold-Forming Processes
CIRP Annals, 1990Summary The contribution first discusses the specific energy consumed in cold forming processes. In order to make on objective comparison of the specific energies consumed in forming as opposed to cutting, the paper proposes the introduction of a new parameter called the degree of structure fineness S. Considering this parameter an energy evaluation
K. Kuzman, J. Peklenik
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Virtual Process Design for Cold Formed Components
Key Engineering Materials, 2015Finite element models optimizing cold forged products have to incorporate the complete manufacturing pathway. Virtual process design as a method based on a multistep operation approach can describe interacting phenomena. Thus, inheritance effects like residual stress and damage evolution can be tracked throughout the processing chain.
Sonja Schratter +3 more
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Some comments on cold forming process stability analysis
Journal of Materials Processing Technology, 2003Abstract The paper deals with accuracy problems in different forming processes. In cold forging, the outcoming part is exactly defined with tolerances and mechanical properties. On the incoming side, where the material is defined, the definition of geometry and mechanical properties fluctuations is not so clear, because they depend also of the chosen
M Nastran, K Kuzman
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Zweistufiges Kaltumformungsverfahren für Zahnräder/Two-stage cold forming process for gear wheels
wt Werkstattstechnik online, 2022Das Querfließpressen wird seit mehreren Jahren zur Fertigung von Stirnrädern verwendet. Dieses Verfahren erfordert hohe Prozesskräfte für die Ausfüllung zahnförmiger Kavitäten, was die Werkzeugstandzeit und die Werkstückqualität reduziert. Am Institut für Umformtechnik IfU wurde das Free-Divided-Flow-Verfahren (FDF) entwickelt, um beim Prägen die ...
Andre Weiß +2 more
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Cracking during cold forming process of rear brake component
Engineering Failure Analysis, 2008Abstract The root cause for cracking of rear brake components occurred during cold forming process was investigated. Optical micrographs showed the abundance of extended inclusions with several rounded ones in the steel. SEM image revealed the fracture surface which contained many extended cavities formed by extended inclusions and dimples all ...
O. Elkoca, H. Cengizler
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Nitridable steels for cold forming processes
Metallurgical Transactions A, 1981Low carbon titanium steels with nickel and/or manganese and silicon additions were developed to combine formability, nitradability with increased strength. The strength, formability, and nitradability of 16 different compositions were investigated. Neither the depth nor the great hardness of nitrided layers, due to TiN particles < 15A in size, was ...
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Spring-back analysis in the cold-forming process of ship hull plates
The International Journal of Advanced Manufacturing Technology, 2018Hull structures and offshore structures are composed of curved thick plates. Line heating method has traditionally been used to produce such curved plates. However, it is recognized that the hot-forming process causes a variety of issues on doubly or multiple curved plates.
Wei Shen +3 more
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Strengthening Mechanisms of 1H18N9T Austenitic Steel Buildups Created with Cold Forming Processes
Advanced Materials Research, 2007In metal forming processes in the tool-workpiece contact area occur high pressure, surface expansion and elevated temperature. It makes ideal circumstances for braking of the lubricant film that causes a direct contact between metallic surfaces. Such a contact usually leads to buildups creation on the tool surface. These phenomena mainly result product
W. Presz, M. Kaczorowski
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A mesoscopic approach of ductile damage during cold forming processes
1997Publisher Summary The mesoscopic model avoids restrictive assumptions usually used in analytical models and appears to give a good account of ductile damage phenomena (nucleation, growth, and coalescence) for all kinds of loading conditions. It represents a very efficient tool for validating analytical models, for understanding the mechanisms and the
G. Brethenoux +4 more
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