塑性材料折断机构的虚拟设计

发布时间：2018-06-02 15:00

本文选题：应力断料 + 旋转斜面　；参考：《兰州理工大学》2012年硕士论文

【摘要】：下料往往影响着生产线效率和后续工序的质量。与传统下料方法相比，应力断料法有低能耗、高效率、节约原材料、减少刀具损耗等优点。本文设计了一种针对塑性材料的折断机构。本文以应力断料法和裂纹技术为基础，利用虚拟样机技术，探讨了塑性材料折断机构的工作原理，完成机构的初步设计，在此基础上进行虚拟建模和装配。最后对其进行了运动学和动力学分析。在本文中主要做了以下工作： 1.分析了传统下料方式存在的问题，论述了虚拟开发技术的优势，在此基础上，探讨了塑性材料折断机构的的工作原理，介绍其断裂判据，建立疲劳寿命的估算模型。 2.应用传统设计方法，对塑性材料折断机构中的主要机构-切槽机构和预荷机构进行结构设计，完成其装配图；分析出机构的薄弱环节，在后续部分对其进行运动学和动力学分析。 3.应用Pro/E软件对切槽机构和预荷机构进行虚拟虚拟建模和装配,对其进行干涉分析，修改并完善尺寸缺陷。 4.应用ADAMS软件对机构进行运动学分析，得出的结论验证了机构运动原理的合理性；以刀具运动平稳为目标，以斜面倾角为变量，对机构进行优化。 5.应用有限元分析方法，，使用ANSYS软件对主轴进行静力学分析，结论验证了强度和刚度符合要求；使用ANSYS对主轴进行模态分析，找出所存在的问题，为优化设计提供依据。
[Abstract]:Cutting often affects the production line efficiency and the quality of subsequent processes. Compared with the traditional cutting method, the stress cutting method has the advantages of low energy consumption, high efficiency, saving raw materials and reducing tool loss. In this paper, a fracture mechanism for plastic materials is designed. Based on stress cutting method and crack technology, this paper discusses the working principle of plastic material fracture mechanism and completes the preliminary design of the mechanism by using virtual prototyping technology. On this basis, virtual modeling and assembly are carried out. Finally, kinematics and dynamics are analyzed. In this paper, the following work has been done: 1. This paper analyzes the problems existing in the traditional blanking method and discusses the advantages of the virtual development technology. On this basis, the working principle of the plastic material fracture mechanism is discussed, the fracture criterion is introduced, and the fatigue life estimation model is established. 2. By using the traditional design method, the structural design of the main mechanism in the plastic material fracture mechanism, the slot cutting mechanism and the preloading mechanism, is carried out, the assembly drawing is completed, and the weak links of the mechanism are analyzed. In the following part, kinematics and dynamics are analyzed. 3. Virtual modeling and assembly of slot cutting mechanism and preload mechanism were carried out by using Pro/E software. The interference analysis was carried out to modify and perfect the dimension defect. 4. The kinematics analysis of the mechanism is carried out by using ADAMS software, and the conclusion verifies the reasonableness of the mechanism's motion principle, and the mechanism is optimized by taking the tool motion stationary as the target and the inclined angle as the variable. 5. The static analysis of the spindle is carried out by using the finite element analysis method and the ANSYS software. The conclusion is that the strength and stiffness meet the requirements, and the modal analysis of the spindle is carried out by using ANSYS to find out the existing problems, which provides the basis for the optimization design.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH12

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