Pb-GF卧式挤压机液压系统的设计与研究

发布时间：2018-06-12 12:22

本文选题：复合线材 + 侧向包覆挤压　；参考：《燕山大学》2016年硕士论文

【摘要】：Pb-GF(Lead-Glass Fiber)复合线材因其高抗拉强度、优良导电性和很好的抗腐蚀性而广泛应用于电动汽车(EVs)和混合型汽车(HEVs)电源栅板,防辐射织物,隔音降噪材料等领域。Pb-GF复合线材是典型的连续脆性纤维增强金属基复合丝材。目前,这种材料的制造技术尚未完全成熟,仍处于不断完善的阶段。本文主要研究了Pb-GF复合线材挤压成形过程,设计了卧式挤压机液压系统,在挤压成形工艺分析的基础上,对卧式挤压机液压系统进行了仿真研究。本文应用DEFORM-3D软件对Pb-GF侧向挤压成形整体过程进行了有限元数值模拟分析,重点研究了温度对稳定成形挤压力的影响以及金属的塑性流动情况。通过对不同温度成形挤压过程的数值模拟分析,找出了工艺可行的温度范围来控制整个侧向挤压成形过程。依据Pb-GF复合线材挤压成形工艺要求,设计了1800kN Pb-GF卧式挤压机液压系统,实现了空程快进,慢进,工进挤压,快速回程的工艺过程。通过采用方向控制插装阀和充液阀相结合的方式来实现系统的差动空程快进,采用调速阀来控制工进挤压时的速度,采用顺序阀来调节回程速度,实现了空程快进到工进挤压时流量、速度由高到低的平稳转换。最后,应用液压系统仿真软件AMESim对复合作用缸、方向控制插装阀和顺序阀等关键液压元件进行建模与仿真。在此基础上,对180吨Pb-GF卧式挤压机液压系统进行了AMESim建模与仿真。研究工作完成了基于工艺的液压系统联合仿真,为该新型设备的产业化奠定了基础。
[Abstract]:Pb-GFN Lead-Glass Fiber-based composite wire is widely used in electric vehicles (EVss) and hybrid vehicles (HEVs) power grid, radiation resistant fabric because of its high tensile strength, excellent electrical conductivity and good corrosion resistance. Pb-GF composite wire is a typical continuous brittle fiber reinforced metal-based composite wire in the field of soundproof and noise reduction materials. At present, the manufacturing technology of this material is not fully mature, still in the stage of continuous improvement. In this paper, the extrusion process of Pb-GF compound wire is studied, and the hydraulic system of horizontal extruder is designed. Based on the analysis of extrusion process, the hydraulic system of horizontal extruder is simulated. In this paper, the finite element numerical simulation of the whole process of Pb-GF lateral extrusion forming is carried out by using DEFORM-3D software. The influence of temperature on the extrusion force and the plastic flow of metal are studied. Through the numerical simulation and analysis of different temperature forming process, the feasible temperature range is found to control the whole lateral extrusion process. The hydraulic system of 1800kN Pb-GF horizontal extruder was designed according to the technological requirements of Pb-GF compound wire extrusion. By adopting the combination of direction-controlled cartridge valve and liquid-filled valve to realize the rapid advance of differential air program, the speed control valve is used to control the speed of extrusion, and the sequential valve is used to adjust the return speed. It realizes the smooth conversion from high speed to low speed when the flow rate is high to low. Finally, the hydraulic system simulation software AMESim is used to model and simulate the key hydraulic components, such as compound acting cylinder, direction-controlled cartridge valve and sequential valve. On this basis, the hydraulic system of 180 t Pb-GF horizontal extruder is modeled and simulated with AMESim. The research completed the process-based hydraulic system simulation, which laid a foundation for the industrialization of the new equipment.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U468.2

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