The Multi-objective Optimization of Clamping Mechanism in the Injection Molding Machine Based on NSGA Ⅱ
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摘要: 以提高电火花线切割加工效率为目的,分析了电火花线切割加工间隙对加工效率的影响,建立了电极丝横向振动数学模型,揭示了各工艺参数对电极丝振幅及加工间隙的影响规律。采用直径1mm的钼丝进行了加工实验,得到了峰值电流、脉冲宽度和脉冲频率等参数对电极丝振幅的影响规律。结果表明所建立的振动模型正确,可为优化电火花线切割加工间隙,从而提高其加工效率提供参考。Abstract: The performance of a clamping system will directly affect the quality of injection-molding products. In the past,the performance of clamping units was optimized by using the single-objective optimization method or traditional multi-objective optimization method,however,the results were not ideal. In this paper,firstly,the mathematical model of the clamping system is established,and a sensitivity analysis method is adopted to determine significant factors from various parameters affecting of the objective functions as design variables,then the NSGAII is applied to optimize the ratio of force amplification and the smoothness of moving-platen speed. Finally,the comparison between the results before and after optimization in ADAMS shows that the ratio of force amplification has increased,and the motion smoothness of moving platen improves well.
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Key words:
- electric currents /
- laplace transfoms /
- machining /
- molybdenum
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