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Cross-Wedge Rolling of Shafts With an Eccentric Step

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Journal of Iron and Steel Research International 2011年第6期18卷 26-30页

作者： zbigniew pater Lublin University of Technology Lublin 20-618Poland

A new concept for forming eccentric shafts on the basis of the cross-wedge rolling （CWR） process was presented. This concept was based on the application of special guides, which, by acting on a billet, lead to its controlled movement in the vertical direction. This movement made possible eccentric cutting of tools into the billet. FEM calculations and experimental rolling tests clearly confirmed the effectiveness of the proposed forming method.

关键词： cross-wedge rolling process eccentric shaft FEM

Cavity formation in cross-wedge rolling processes

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Journal of Iron and Steel Research International 2019年第1期26卷 1-10页

作者： zbigniew pater Janusz Tomczak Tomasz Bulzak Department of Computer Modelling and Metal Forming Technologies Mechanical Engineering FacultyLublin University of TechnologyLublin 20-618Poland

The problem of end-face cavity formation in parts produced by cross-wedge rolling was studied in order to reduce material *** cavity depth was measured by the displacemern ***-one different cases of rolling were analysed by finile element method to determine the effects of process parameters such as the wedge tool angle,the temperature of material,the tool velocity and the reduction ratio on the depth of end-face *** between these parameters are examined in order to establish depe ndencies enabling quick and simple selection of a con cavity allowance in order to remove the *** equations for calculating the con cavity allowance were verified in an experimental process for manufacturing ball pins with the use of flat *** tests were performed using a billet with its length selected in compliance with the established *** experimental results demonstrate that the proposed solution is a viable method for end-face cavity removal.

关键词： Cross-wedge rolling End-face cavity Concavity allowance Ball pin

Analysis of the Cross-Wedge Rolling Process of Toothed Shafts Made from 2618 Aluminium Alloy

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Journal of Shanghai Jiaotong university(Science) 2011年第2期16卷 162-166页

作者： pater zbigniew GONTARZ Andrzej TOFIL Arkadiusz Mechanical Department Lublin University of Technology

The paper presents the results of a thermo-mechanical analysis of the rolling two stepped *** of the shafts has a toothed step with skew teeth,while the other has a worm winding in the shape of a trapezoidal *** shape of the rolling tools resembles that of the tools used in the Roto-Flo rolling method;yet unlike in Roto-Flo,the shafts are hot-rolled and no centres are used to stabilize the position of the workpiece during the forming *** the calculations made with use of the DEFORM-3D process simulation system it has been assumed that the rolled shafts are made from 2618 aluminium *** a result of the calculations made,it has been found that the toothed stepped shafts can be formed in one pass by means of the cross rolling ***,the temperature and strain distribution in the rolled product have been determined as well as some data concerning the forces which are necessary for the rolling process have been obtained.

关键词： cross rolling toothed shafts 2618 aluminium alloy finite element method (FEM)

Numerical Analysis of Unconventional Forging Process of Hollowed Shaft from Ti-6Al-4V Alloy

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Journal of Shanghai Jiaotong university(Science) 2011年第2期16卷 157-161页

作者： GONTARZ Andrzej pater zbigniew TOFIL Arkadiusz Department of Computer Modelling and Metal Forming Technologies Lublin University of Technology Technical Institute State School of Higher Education in Chelm

This paper presents theoretical analysis of unconventional forging process of hollowed shaft from Ti-6Al-4V alloy in a three-slide forging *** method in comparison with other metal forming methods allows for obtaining of hollowed *** designed process is verified theoretically by means of numerical simulations based on finite element method with assumption of 3D state of *** following factors are considered in the analysis:material flow kinematics,strain distribution,temperature distribution and force of *** the basis of results,it is stated that the application of designed technology allows for obtaining of a product of assumed quality.A comparison is made between material consumption in analyzed process and material consumption in typical metal forming methods,also in used at present technology of shaft manufacturing by machining *** is stated that the application of forging in the three-slide forging press allows for a considerable decrease of manufacturing costs due to material savings and decrease of labor consumption of operations at finishing.

关键词： hollowed shaft die forging three-slide forging press finite element method

Recent advances and trends in roll bonding process and bonding model:A review

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Chinese Journal of Aeronautics 2023年第4期36卷 36-74页

作者： Zixuan LI Shahed REZAEI Tao WANG Jianchao HAN Xuedao SHU zbigniew pater Qingxue HUANG College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030002China Institute of Materials Science Technische Universita¨t DarmstadtDarmstadt 64287Germany Faculty of Mechanical Engineering&Mechanics Ningbo UniversityNingbo 315211China Faculty of Mechanical Engineering Lublin University of TechnologyLublin20618Poland

This review presents a thorough survey of the roll bonding process with a focus on the bimetallic bars/tubes as well as the bonding models and *** review aims to provide insight into cold,hot and cryogenic bonding mechanisms at the micro and atomic scale and act as a guide for researchers working on roll bonding,other joining processes and bonding ***-while,the shortcomings of roll bonding processes are presented from the aspect of formable shapes,while bonding models are shown from the aspect of calculation time,convergence,interface behav-ior of dissimilar materials as well as hot bonding status *** well-accepted numerical methodologies of bonding models,namely the contact algorithm and cohesive zone model(CZM)of bonding models and in simulations of the bonding process are ***,recent advances and trends in the application of the combination of mechanical interlocking and metallurgical bonding,special energy fields,gradient structure,novel materials,green technology and soft computing method in the roll bonding process are also *** challenges for advancing and prospects of the roll bonding process and bonding model are presented in an attempt to shed some light on the future research direction.

关键词： Bimetallic Bonding mechanism Bonding model Numerical simulation Roll bonding process