【摘要】：由于大型液壓機零部件多、尺度大,新產品研發(fā)、銷售展示和教學實驗中,采用虛擬三維模型不能直觀呈現,試制樣機成本較大,周期較長,本研究將3D打印技術應用于大型液壓機教學展示模型設計制造,縮短了產品研發(fā)周期,降低了制造成本。然而,基于用戶體驗、生產實際以及耐用性等方面的考慮,大型液壓機的3D打印模型需要進行一系列的結構優(yōu)化設計,從而滿足許多特殊的需求。本文以三梁四柱大型液壓機為例,從3D打印模型的機械強度、剛度、穩(wěn)定性、材料節(jié)約性、整體美觀性、實用性等要求出發(fā),對大型液壓機3D打印模型進行結構優(yōu)化設計研究,分別提出了大型液壓機3D打印模型的拓撲優(yōu)化方案和蒙皮框架結構設計方案。為了在拓撲優(yōu)化時保護模型外形細節(jié),對部件模型進行了特殊的抽殼處理,并利用ANSYS Workbench軟件的Shape Optimization模塊和Static Structural模塊分別對受載荷及邊界復雜的大型液壓機部件模型內部實體實施了拓撲優(yōu)化分析,以及優(yōu)化前后的應力、應變、總變形位移、Y向變形位移的分析對比,進一步驗證其拓撲優(yōu)化結果是否滿足強度和剛度要求;采用板殼理論以及材料力學等理論,結合大型液壓機輔助部件模型的不同受力情況,設計出符合要求的蒙皮框架結構,并對蒙皮框架結構的基本尺寸進行計算校核,拓撲優(yōu)化和蒙皮框架結構設計之后的各部件模型被進一步拆分打印實現。各部件模型優(yōu)化和設計前后的質量變化被呈現出來,并通過計算和分析優(yōu)化和設計前后各部件模型的質量比率和實際耗材質量比率,驗證了本研究中的大型液壓機3D打印模型的優(yōu)化設計方案的可行性和必要性。
[Abstract]:Because the large hydraulic press has many parts and large scale, new product research and development, sales display and teaching experiment, the virtual 3D model can not be visualized, the cost of the prototype is high and the period is longer. In this study, 3D printing technology is applied to the design and manufacture of large hydraulic press teaching demonstration model, which shortens the product development cycle and reduces the manufacturing cost. However, based on the considerations of user experience, production practice and durability, 3D printing model of large hydraulic press needs a series of structural optimization design to meet many special needs. Taking a large hydraulic press with three beams and four columns as an example, from the requirements of mechanical strength, stiffness, stability, material saving, overall aesthetics and practicability of 3D printing model, the structural optimization design of 3D printing model of large hydraulic press is studied in this paper. The topology optimization scheme of 3D printing model of large hydraulic press and the design scheme of skin frame structure are put forward respectively. In order to protect the shape details of the model during topology optimization, a special shell extraction process is carried out for the component model. Using the Shape Optimization module and Static Structural module of ANSYS Workbench software, the topology optimization analysis of the internal entity of the large hydraulic press component model with complex load and boundary is carried out respectively, and the stress and strain before and after optimization are also analyzed. The analysis and comparison of the total deformation displacement and Y direction deformation displacement further verify whether the topological optimization results meet the requirements of strength and stiffness, and adopt the theory of plate and shell and material mechanics, etc. According to the different force condition of the auxiliary parts model of large hydraulic press, the skin frame structure which meets the requirements is designed, and the basic dimensions of the skin frame structure are calculated and checked. After topology optimization and skin frame structure design, each component model is further split and printed. The quality changes before and after the optimization and design of each component model are presented, and the mass ratio of each component model and the actual material quality ratio before and after optimization and design are calculated and analyzed. The feasibility and necessity of the optimal design of 3D printing model of large hydraulic press in this study are verified.
【學位授予單位】：合肥工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG315.4

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