Book ChapterDOI
Estimation of the Grain Size Number and Microstructure Analysis of AA6061 Alloy Flow Formed Tubes
Venkateshwarlu G,K. Ramesh Kumar,G. Gopi,T. A. Janardhan Reddy +3 more
- pp 757-766
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TLDR
In this paper, the AA6061 aluminum alloy is considered for flow forming and the mechanical properties of this alloy are dependent on the rate at which the alloy is heated and quenched.Abstract:
Flow forming process is a chipless metal forming process used for the production of high accuracy axi-symmetrical cylindrical components. During this process there is an increase in tube length and decrease in thickness without any change in internal diameter. Generally forming is performed with a single roller or three rollers over a rotating mandrel and the present work is with three roller setup. The work material is plastically deformed in the radial direction by compression due the rollers and made to flow in an axial direction and the thickness reduction is achieved with single pass. The AA6061 aluminum alloy, usually used in defense components is considered for flow forming. The mechanical properties of this alloy are dependent on the rate at which the alloy is heated and quenched. Solution treatment has been carried out at 400 °C for 2 h followed by quenching in water. Microstructure of the finished product has been studied by using SEM and grain size is estimated for different reduction ratios and stagger distance using the intercept method.read more
References
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Journal ArticleDOI
Experimental study and FEM analysis of redundant strains in flow forming of tubes
TL;DR: In this paper, a coupled set of experiments and numerical simulations using the commercial finite element code ABAQUS/Explicit was used to study the evolution of redundant strains in a single-roller flow forming process in one pass.
Journal ArticleDOI
Experimental study of thickness reduction effects on mechanical properties and spinning accuracy of aluminum 7075-O, during flow forming
TL;DR: In this article, the effects of thickness reduction on the mechanical properties and spinning accuracy are experimentally investigated on 7075-O aluminum tube on which a prototype spinning machine has been designed and manufactured.
Journal ArticleDOI
Plastic Flow Instability Under Compressive Loading During Shear Spinning Process
Micha Gur,Jehuda Tirosh +1 more
Journal ArticleDOI
Analysis of Diametral Growth and Working Forces in Tube Spinning
Masujiro Hayama,Hiroaki Kudo +1 more
TL;DR: In this article, the best method to estimate the accuracy of the diameter of the parts and the working forces in tube spinning process is discussed, where the deformation energy of the tube consumed on the contact area between the roller and the mandrel is minimized.
Journal ArticleDOI
A study of the rational matching relationships amongst technical parameters in stagger spinning
Xue Kemin,Lu Yan,Zhao Xianming +2 more
TL;DR: In this article, the technical parameters in stagger spinning are analyzed and processed, and the rational matching relationships amongst the parameters are obtained by establishing the objective function and constraints, and selecting the proper penalty factor on the basis of optimization design theory.