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Numerical Simulation on Compacting Mechanism of Shaft by Trio Cross Wedge Rolling and Experimental Study

Author: WangFeiXue
Tutor: DuFengShan
School: Yanshan University
Course: Mechanical Design and Theory
Keywords: Three-roll cross wedge rolling Rigid-plastic finite element method Hollow-ware Mandrel Loose core part
CLC: TG333
Type: Master's thesis
Year: 2005
Downloads: 232
Quote: 3
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Abstract


Cross wedge rolling technology is a multidisciplinary problem , the design of new products not yet formed a system of theoretical science , repeated trial caused huge time and cost consumption . So , to carry the the parts to rolling forming mechanism simulation accurately solve parts forming process of the key issues that affect the quality of products , and of great significance to the establishment of the parts rolling system science theory . In this paper, the theoretical modeling of DEFORM finite element software , three-roll cross wedge rolling the entire rolling process simulation . Orthogonal test factors can affect a variety of rolling force to conduct a comprehensive and systematic in-depth study . The ability to measure its rolling mill , stiffness design, process optimization has important practical value . Papers on the basis of previous studies on a variety of three-roll cross wedge rolling pieces heart point stress strain curve tracking to draw alternating shear stress and shear strain is the main reason for the rolling ring loose . Cross wedge rolling process of heart cracks control there are some difficulties , at the same time , the core part of the shaft in quenching impervious phenomenon will reduce its life , so , direct application of thick-walled tube processing hollow tube axis will solve the core part of the cross wedge rolling the defect control problem . To this end , this paper establishes the finite element model of the three-roll cross wedge rolling hollow shaft parts . The hollow shaft of forming various stress field distribution , provides a theoretical basis for understanding and solving the hollow shaft parts forming regularity . In order to solve the uneven wall thickness of the hollow shaft part forming process and the conditions of rotational molding bad problem . With mandrel three-roll cross wedge rolling process and rolling process with the hollow shaft parts . Through various force field distribution and the stress-strain curve analysis , proved more favorable with mandrel rolling rolling quality . In this paper, the actual hot-rolled DS200 three-roll cross wedge rolling mill , plastic analysis of rolling forming regularity and rolling force of energy parameters , and compared with the calculation results of the finite element model was built , both consistent . The article also test ring loose three-roll cross wedge rolling pieces .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Rolling mill machinery equipment
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