文丘里管液压胀形工艺仿真研究

Simulation research on hydraulic bulging process of Venturi tube

针对文丘里管流量计现阶段生产工艺工序多、轻量化困难的问题,提出液压胀形工艺生产文丘里管流量计。为了探究各工艺参数对文丘里管流量计液压胀形的影响,以材料力学为理论基础,基于有限元软件进行单因素数值模拟,探究成形效果较好的加载路径、接触面摩擦因数以及加载压力。以数值模拟结果为依据进行实验验证,并将数值模拟结果与实验结果进行对比。结果表明,实验壁厚与仿真壁厚变化趋势一致。仿真壁厚最大减薄处位于过渡区与成形区结合处,减薄率为28.9%,最大应变为0.3043,整体壁厚变化连续性强。

In view of the problems of multiple production processes and difficult lightweigh of Venturi tube flowmeter at the present stage,the hydraulic bulging process was proposed to produce Venturi tube flowmeter.To explore the influence of various process parameters on the hydraulic bulging of Venturi tube flowmeter,based on the theory of material mechanics,the single factor numerical simulation was conducted based on the finite element software to explore the loading path,friction factor of contact surfaces and loading pressure with better forming effect.Based on the numerical simulation results,the experimental verification was carried out,and the experimental results were compared with the numerical simulation results.The results show that the change trend of the experimental wall thickness is consistent with that of the simulation wall thickness.The maximum thinning position of simulated wall thickness is located at the junction of the transition zone and the forming zone,the thinning rate is 28.9%,the maximum strain is 0.3043,and the overall wall thickness changes continuously.