| 金属增材制造液压阀块内部流道优化设计研究 |
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| 引用本文： | 张军辉,刘淦,郑神.金属增材制造液压阀块内部流道优化设计研究[J].液压与气动,2019,0(1):21-25. |
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| 作者姓名： | 张军辉 刘淦 郑神 |
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| 作者单位： | 浙江大学流体动力与机电系统国家重点实验室， 浙江杭州310027 |
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| 基金项目： | 国家自然科学基金（51605425） |
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| 摘 要： | 液压阀块是液压系统的重要组成部分,采用锻造-钻铣传统方法加工的流道只能采用直孔形式并且管路交叉沟通不灵活。选区激光熔融增材制造克服了传统加工的限制,可实现两端盲孔流道加工、任意走向及任意曲率流道加工,并能剔除非必需质量,实现液压阀块的集成化、轻量化和节能化设计。与传统阀块相比,金属增材制造液压阀块体积降低30%以上,重量降低50%以上。但是金属增材制造受到悬垂部件阈值角度限制,传统圆形截面流道加工存在局部支撑结构,而阀块内部复杂流道的支撑结构很难去除,因此削弱了增材制造技术在轻量化和节能化方面的效果。以减少内部流道的辅助支撑为目标,提出采用异形截面流道的设计方案,通过理论分析和仿真对比,实现少支撑甚至零支撑的内部流道设计效果,为液压元件的增材制造技术提供理论支撑。
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| 关 键 词： | 液压阀块 内部流道 增材制造 选区激光熔融 |
| 收稿时间： | 2018-01-04 |
Optimization of Internal Channels for Hydraulic Manifolds Using Metal Additive Manufacturing Technology |
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| ZHANG Jun-hui,LIU Gan,ZHENG Shen.Optimization of Internal Channels for Hydraulic Manifolds Using Metal Additive Manufacturing Technology[J].Chinese Hydraulics & Pneumatics,2019,0(1):21-25. |
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| Authors: | ZHANG Jun-hui LIU Gan ZHENG Shen |
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| Affiliation: | State Key Laboratory of Fluid Power & Mechatronic Systems, Zhejiang University, Hangzhou, Zhejiang310027 |
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| Abstract: | Hydraulic manifolds are important parts of a hydraulic system, and channels produced by traditional processes like forging, drilling and milling can only take the straight form along with inflexible intersection of channels. Selective laser melting (SLM) can overcome constrains that exist in traditional manufacturing, and can produce channels with two blind ends with arbitrary directions and arbitrary curvatures. Meanwhile, it can reduce unnecessary mass and realize compactness, lightweight and energy-saving goals. Compared with traditional manifolds, metal additive manufacturing ones can reduce more than 30% in volume and 50% in weight. However, metal additive manufacturing is limited by threshold angle of overhanging parts, while the traditional circular cross-section flow channel has local support structures that are hard to be removed especially in complex path, and this limitation detracts the advantages of additive manufacturing in lightweight and energy-saving. In order to reduce support structures, the maximum diameter of channel without support structures is determined. A profiled cross-section flow channel is proposed and it can reduce or even eliminate support structures based on theoretical analysis and the comparison of simulation results. Hopefully, it may provide a theoretical basis for additive manufacturing of hydraulic components. |
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| Keywords: | hydraulic manifold internal channels additive manufacturing selective laser melting |
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