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介绍自行设计新型液压脉振注射成型机的注射部分结构性能,分析了螺杆在振动力场下的轴向受力状况,通过将实际螺杆简化成广义螺杆,利用集中质量的方法建立了注射过程螺杆轴向振动响应的物理和数学模型,研究了此种振动装置在注射过程螺杆的动态响应。在工作频率范围内,随着振动频率增大,螺杆响应振幅减小,低频率激励的振幅动态放大系数高于高频率激励振幅放大系数,实验结果与理论分析相一致,为新型液压脉振注射成型机振动参数的确定提供了理论依据。
In this paper, the structure of the injection part of a new type of hydraulic pulse vibration injection molding machine designed by ourselves is introduced. The axial force condition of the screw under the vibration force field is analyzed. By the way of reducing the actual screw into the generalized screw, Axial and vibration response of the physical and mathematical model of the vibration of this device during injection screw dynamic response. In the operating frequency range, as the vibration frequency increases, the amplitude of the screw response decreases, the amplitude dynamic amplification coefficient of low-frequency excitation is higher than that of high-frequency excitation amplification. The experimental results are consistent with the theoretical analysis. Shaking machine vibration parameters to provide a theoretical basis.