| 基于CFD动网格优化快速锻造机补液模型研究 |
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| 引用本文： | 王欲进,柳渊,韩贺永.基于CFD动网格优化快速锻造机补液模型研究[J].液压与气动,2021,0(3):108-113. |
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| 作者姓名： | 王欲进 柳渊 韩贺永 |
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| 作者单位： | 1.太原学院机械工程系, 山西太原 030032;2.太原科技大学机械工程学院, 山西太原 030024 |
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| 基金项目： | 山西省重点研发计划(201903D121041);山西省高等学校优秀成果培育项目(2020KJ019);山西省高等学校优秀青年学术带头人支持计划(20191044);山西省“1331”项目(2020-44) |
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| 摘 要： | 随着汽车行业的发展,汽车对金属材料的加工要求越来越高,尤其对车轴的金属质量和加工精度提出了更加严格的要求。目前加工车轴的快速锻造机,采用充液罐进行补液,此方式无法实现高质量和高精度的加工。使用充液罐补液存在两个不足:一是充液罐压力低,滑块在下行接触工件后,液压油流速低,补液时间较长,建压缓慢,导致工作效率低;二是液压缸进口压力及滑块下行速度对液压缸内的空化量影响较大。通过ANSYS建立快速补液装置的模型,并进行计算仿真和数值分析,研究了快速锻造机的补液装置的进口压力和滑块下行速度对于补液流速和空化量的影响,发现补液流速随着进口压力的增加而增加,同时空化量减少;降低滑块(活塞)下行速度,有利于减少空化量,增加控制精度。
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| 关 键 词： | CFD动态网格 混合物模型 空化 控制模型 锻造 |
| 收稿时间： | 2020-11-05 |
CFD Dynamic Grid Optimization Fluid Replenishment Model: Rapid Forging Machine |
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| WANG Yu-jin,LIU Yuan,HAN He-yong.CFD Dynamic Grid Optimization Fluid Replenishment Model: Rapid Forging Machine[J].Chinese Hydraulics & Pneumatics,2021,0(3):108-113. |
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| Authors: | WANG Yu-jin LIU Yuan HAN He-yong |
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| Affiliation: | 1. Department of Mechanical Engineering, Taiyuan University, Taiyuan, Shanxi030032;2. School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi030024 |
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| Abstract: | With the development of the automobile industry, automobiles have kept improving the processing requirements of metal materials, especially the metal quality and processing accuracy of the axles. However, the current rapid forging machine for processing axles uses a liquid-filled tank for rehydration, which cannot achieve high-quality and high-precision processing. There are two shortcomings in using the filling tank for rehydration: one is the low pressure of the filling tank. After the slider contacts the work-piece downward, the hydraulic oil flow rate is low and the fluid replenishment takes a long time, resulting in slow pressure build-up, resulting in low work efficiency; second, the hydraulic cylinder inlet The pressure and the downward speed of the slider have a greater influence on the cavitation in the hydraulic cylinder. This paper established the model of the rapid refill device through Ansys, and performed calculation simulation and numerical analysis, and studied the influence of the inlet pressure of the refill device of the rapid forging machine and the descending speed of the slider on the fluid replenishment flow rate and cavitation amount. It is found that the fluid supplement flow rate increases with the increase of inlet pressure, while the cavitation volume decreases. Reducing the downward speed of the slider (piston) will help reduce the amount of cavitation and increase the control accuracy. |
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| Keywords: | CFD dynamic grid mixture model cavitation control method forging |
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