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  • Computer prediction for three-roll reducing process of seamless tube

    • 摘要:

      Based on U.L. method, this paper described the application of the finite element method for three-dimensional elastoplastic deformation to predict the seamless tube forming process by computer. The transforming matrix between the integrated coordinate and local coordinates was given in the wave front area. By using the finite method together with EPFEP3 program, its preparation and post-treating programs were developed. The simulation model for controlling product quality was established and a lot of information of workpiece deformation including displacement and flow field were given. The integration research of finite element method and computer-aided design was realized for seamless tube forming.

    • 作者:

      Du Fengshan;Huang Qingxue;Liu Cai

    • 刊名:

      Kang T Ieh Iron and Steel Peking

    • 在线出版时间:

      1995

  • Precise definition of contact angle field on high speed angular-contact ball bearing under axial load

    • 摘要:

      Based on the system analysis of dynamic equations group of high-speed angular-contact ball bearing, an analysis to find the ultimate variables of the adjunct equations was given, and a chart about coupled variables was obtained which showed that the contact angle are the ultimate variables. Based on above-mentioned analysis, according to the feature of the bearing under axial load, an algorithm has been put forward, which took the contact angle as the iterate variables. Based on the present calculation results, an analysis was given, which showed that the increment of internal contact angle is larger than that of external contact angle, the analysis would be helpful to define the contact angle field. By using the method of contact angle iterate, an example was given, which verified the analysis of increment of contact angle is correct. So the search field of contact angle has been reduced half, and the calculation is simplified obviously.

    • 作者:

      Zhao Chunjiang;Cui Guohua;Wang Guoqiang;Huang Qingxue;Zhang Fangping

    • 刊名:

      Nongye Jixie Xuebao Transactions of the Chinese Society of Agricultural Machinery

    • 在线出版时间:

      2008

  • Solution of the dynamic characteristic of angular-contact ball bearing based on analysis of contact angle variable deliver

    • 摘要:

      Based on the dynamic change of the contact angle during the high-speed operation of the angular-contact ball bearing, a systematic analysis on the equation group of its dynamic characteristic was performed. The variable deliver was analyzed from the adjunct equations to solve the dynamic characteristic, and it was found that every adjunct equation is the function of the inner and outer actual contact angle. Therefore, a method based on the search in the contact angle solution domain was suggested to calculate the dynamic characteristic of the angular-contact ball bearing to avoid the complexity and the potential of iterative divergence of the conventional Newto-Raphson iterative method in solving the dynamic equation group, thus the method of solving the equation group is changed into the method of proving the equation group. Besides, a least-square criterion to identify the optimum contact angle was given. An example was presented to demonstrate the feasibility of the suggested method.

    • 作者:

      Zhao Chun-Jiang;Cui Guo-Hua;Wang Guo-Qiang;Huang Qing-Xue;Sun Lian-Ke

    • 刊名:

      Jilin Daxue Xuebao Gongxueban Journal of Jilin University Engineering and Technology Edition

    • 在线出版时间:

      2009

  • Advanced Materials Research: Preface

    • 摘要:

    • 作者:

      Huang Qingxue;Jiang Zhengyi

    • 刊名:

      Advanced Materials Research

    • 在线出版时间:

      2011

  • Simulation and experimental study of cold-bend forming of high-strength stainless steel arc plate in underground

    • 摘要:

      Aiming at high precision requirement of stainless steel arc plate resulting in difficulty in forming process, bending angle expression consistent with high-strength stainless arc plate, energy equations of transverse and longitudinal deformation were deduced, according to Vlasov open-profile thin-walled beam theory. And so was the process planning. Based on theoretical calculation the mathematical model was established to simulate the forming process of arc plate. From defects such as wrinkle, flange and so on, the model was modified many times through plus side roller to obtain the optimal final plate shape. Meanwhile, through rolling force in forming process and springback value after stainless steel arc plate forming, the reasonability of theoretical pass deformation distribution was judged. According to the improved cold-roll forming equipment of cooperative enterprise and the optimum simulation results, high-strength stainless steel arc plate was rolled favorably after several modifications. The testing result in site indicated the spring-back amount after forming was small and the product quality met the precision requirement of the users.Thereby this study on the cold-bend forming of high-strength stainless steel arc plate is of great significance to the optimum processing technology, bending roller quality and precision.

    • 作者:

      Chu Zhi-Bing;Ma Li-Feng;Huang Qing-Xue;Pan Hai-Yan;Pan Li-Jun;Yan Zhi-Jie

    • 刊名:

      Suxing Gongcheng Xuebao Journal of Plasticity Engineering

    • 在线出版时间:

      2012

  • Equation of shape control and edge drop on ucmw tandem cold mill

    • 摘要:

      Edge drop of strip and sheet is a key technological issue besides of gauge control and shape control during the process of wide strip rolling, the reasonable control procedure of edge drop can increase the qualified product ratio, as well the quality and performance of product, it is especially effective for the silicon steel sheet, tin sheet and automobile body sheet. Therefore, more researchers focus on the edge drop of strip and its control technology in recent years. In this paper, a new strip profile control equation is established originally, according to the ways of strip shape control technology of large-scale tandem cold rolling mills. The new equation describes both the shape control and edge drop control. Some verification is developed in the equation based on the 1420mm UCMW tandem cold mill. The research result about mechanics of edge drop and it's control have been applied in tandem cold rolling mill. The good result is obtained according to the field measured data, and the control precision is increased greatly. © (2012) Trans Tech Publications, Switzerland.

    • 作者:

      Du Xiaozhong;Huang Qingxue;Yang Quan

    • 刊名:

      Advanced Materials Research

    • 在线出版时间:

      2012

  • Comprehensive study on principle of high-strength stainless steel arc strip in cold-forming

    • 摘要:

      Based on Vlasov open-profile thin-walled beam theory, bending angle expression consistent with high-strength stainless arc strip, energy equations of transverse and longitudinal deformation were deduced and process planning was obtained. The mathematical model of service behavior was established and the rolling force and spring back value after stainless arc strip being formed were simulated to judge the distribution reasonability of theoretical pass deformation. Depending on improved cold-roll forming equipment of cooperative enterprise and optimum simulation results, after several modification, high-strength stainless arc strip was rolled favorably, and testing result in site indicated that spring-back amount after forming is small and product quality could meet precision requirement of the users. Therefore the synthesis study on high-strength stainless arc strip of cold-bending principle is of great significance to optimum processing technology, bending roller quality and precision.

    • 作者:

      Chu Zhi-Bing;Ma Li-Feng;Huang Qing-Xue;Pan Hai-Yan;Pan Li-Jun;Yan Zhi-Jie

    • 刊名:

      Sichuan Daxue Xuebao Gongcheng Kexue Ban Journal of Sichuan University Engineering Science Edition

    • 在线出版时间:

      2012

  • Research on properties of compound linkage recapitulation rolling trace

    • 摘要:

      Through analyzing the theory of a new multi-degree -freedom composite linkage rod rolling shear mechanism, position loop equations of the link shear mechanism were established, and the guide rod and frame hinged position determination method was corrected.Based on a large steel mill hydraulic rolling shear machine development, the new shear movement trajectories were simulated.The precise simulation data for the electric hydraulic servo control system provides a guarantee to realize the speed and position control precision.The production of high quality steel plate shear section confirmes the reasonable institutions stem size can reduce knife arc horizontal displacement, improve the evenness of shear blade overlap, realize high precision cutting.

    • 作者:

      Ma Lifeng;Wang Gang;Huang Qingxue;Chu Zhibing;Huang Zhiquan;Han Heyong

    • 刊名:

      Zhongguo Jixie Gongcheng China Mechanical Engineering

    • 在线出版时间:

      2013

  • Effects of β-Mg17A112on edge crack of roll-casting AZ31B magnesium alloy plate

    • 摘要:

      The effects of β-Mg17Al12on the edge crack behavior of twin-roll casting AZ31B magnesium alloy plate were studied by optical microscope, field emission scanning electron microscope and tensile testing. The results indicate that in the surface and the edge of AZ31B magnesium alloy cast-rolling plate, β-Mg17Al12phase mainly distributes at the grain boundary and its density is big, forming net-shape; and in the center and the middle of the plate, spherical β-Mg17Al12phase disperses in α-Mg matrix, and forms lamellar-shape; the net-shaped β-Mg17Al12phase in the plate can decrease the mechanical properties, while the lamellar-shaped β-Mg17Al12phase improve its ductility. The bonding force between the β-Mg17Al12phase and the α-Mg matrix in the grain boundary is bad and characterized by brittleness. In the deformation of roll casting process, first of all, β-Mg17Al12phase separates from the α-Mg matrix, resulting in crack initiation and propagation in grain boundary; rolling pressure and friction produces tensile strain accumulation in the rolling region, and passes to the solidification shell which is on the both sides of liquid region (i.e. the slab edge), making grains break or tear along the grain boundary β-Mg17Al12phase to deepen longitudinally and as a result the edge crack forms.

    • 作者:

      Huang Zhiquan;Huang Qingxue;Ma Lifeng;Lin Jinbao;Pang Zhining

    • 刊名:

      Xiyou Jinshu Cailiao Yu Gongcheng Rare Metal Materials and Engineering

    • 在线出版时间:

      2014

  • Influence of performing process on bond effects of hot-rolled stainless steel and carbon steel clad billets

    • 摘要:

      The interface microstructure and properties of hot-rolled stainless steel and carbon steel clad billets prepared by vacuum electron beam welding (VEBW), all-around weld of interface and vacuuming (AAWIV) and all-around weld of interface (AAWI) process were studied. The results show that 100% union rates can be achieved for the hot-rolled clad billets prepared by AAWIV and VEBW, but those welded by AAWI have lower bonding rates after rolling. The microstructure in the successful bonded zones of hot-rolled clad billets prepared by the foregoing three methods are similar because they all have three regions of stainless steel, carbon steel and composite layer and decarburization zones in carbon steel side near the composite layer as well as discontinuously distributed inclusions close to the stainless steel side. The investigation of the bond strengths of hot-rolled clad billets prepared by VEBW and AAWIV reveals high strength composite achieves and the strength values of the VEBW clad billets are all slightly higher than that of the AAWIV clad billets.

    • 作者:

      Huang Qing-Xue;Yang Xiao-Rong;Zhou Cun-Long;Liu Guang-Ming;Ma Li-Feng;Li Hai-Bin

    • 刊名:

      Cailiao Rechuli Xuebao Transactions of Materials and Heat Treatment

    • 在线出版时间:

      2014

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