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Zhang H.-W.,South China University of Technology | Zhang H.-W.,China Institute of Technology | Xia W.,South China University of Technology | Wu Z.-H.,China Institute of Technology | And 3 more authors.
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | Year: 2013

Double-toggle clamping device plays a vital role in ensuring the working performance of large die-casting machines. However, the problems existing during the design of clamping devices, namely, various design variables and complex parameters, decrease the expansion force coefficient of the designed clamping devices and reduce the performance of the double-toggle. In order to solve these problems, a multi-body dynamic mathematical model is proposed for the optimal design of the clamping device of a 25 MN die-casting machine, and the multi-body dynamic software MSC.Adams is employed to analyze and optimize the design parameters in the proposed mathematical model. The results show that, for the optimized clamping device, the expansion force coefficient increases from 18.93 to 23.59, the travel distance of the moving platen decreases by 17.4% and the clamping force increases to 32.27 MN, and that the optimization reduces the impact force, improves the stability of the mould clamping and rea-lizes the energy conservation. Then, the strength check for the optimized design is carried out by means of numerical simulation. It is found that the design requirements are met. Finally, the optimized design is applied to the prototype of a 25 MN die-casting machine.

Tao Z.,Guangdong Yizumi Precision Machinery Co. | Yongbing L.,Jilin University | Tiejun S.,Guangdong Yizumi Precision Machinery Co. | Binli L.,Guangdong Yizumi Precision Machinery Co. | And 2 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2010

Main technological requirements on semi-solid injecting forming for magnesium alloy were described. Based on experiments, control ways of injecting velocity in semi-solid injecting forming were investigated to realize the improvement of some performance in magnesium alloy semi-solid injecting forming machine such as fast dynamic response, stable pressure control and excellent velocity control.

Zheng Z.-X.,Guangdong Polytechnic Normal University | Zhang H.-W.,Guangdong Machinery Research Institute | Wu Z.-H.,Guangdong Machinery Research Institute | Jing Y.-Y.,Guangdong Yizumi Precision Machinery Co.
Advanced Materials Research | Year: 2012

The nonlinear contact mathematic model is constructed for the bolt joint structure on the fixed end of the Gelin column of die casting machinery and the FEM model and optimization mathematic model for the bolt joint structure are realized by software of ANSYS and the APDL language embedded in it. The structural parameters of different type of thread in Gelin column are optimized. After the comparison of equivalent contact stress in the region of the different type of the bolt joint in Gelin column, it is shown that there is more even load-bearing characteristics with the trapezoidal thread than zigzag thread and the maximum of the equivalent contact stress with the trapezoidal thread is decreased about 41% of that in zigzag thread which can effectively improve lifecycle and anti-fatigue performance of the threaded joint in the gelin column. © (2012) Trans Tech Publications.

Kong X.,Zhejiang University | Ling Z.,Zhejiang University | Zhang X.,Guangdong Yizumi Precision Machinery Co. | Ruan X.,Zhejiang University
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2011

An analysis instrument based on embedded technology for die casting machine was described, which could adapt to the harsh environment in the die casting plant. Besides the functions of displaying the technological curves and parameters, the instrument established the database of technological parameters and analyzed the database with statistical theory. As a result, the statistic parameters and probability distribution curves were drawn. A die casting machine could be desirably matched with its optimized mould design parameters. For the die casting whose technology parameters could not meet the requirements, an alarm signal would tell the operator to check the quality of the die castings.

Guangdong Yizumi Precision Machinery Co. | Date: 2011-01-07

Embossing machines; Foundry machines; Metalworking machines; Industrial machine presses; Industrial robots.

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