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棒料折断机构的基本原理与虚拟开发

作　者: 刘波
导　师: 李有堂；剡昌锋
学　校: 兰州理工大学
专　业: 机械设计
关键词: 折断机棒料理工大学基本原理虚拟装配硕士学位论文虚拟样机技术旋转弯曲兰州广义坐标
分类号: TG333.2
类　型: 硕士论文
年　份: 2006年
下　载: 23次
引　用: 2次
阅　读: 论文下载

内容摘要

The subject is sponsored by the plan of Gansu Province of key scientific and technical problems, and aimed at the creative design of blanking equipment of bar stock and based on the breaked blanking model of bar stock. The research of the elementary theory and the working principle of the breaked blanking model of bar stock are studied in this paper;moreover, the development research of the technology and the equipment of the breaked blanking bar stock are carried out.Firstly, several common blanking models are introduced and compared in the paper. By analyzing their characteristics, means of implementation and scopes of application, recommend their essential problems. Based on them, a new type of stress blanking model — —the breaked blanking model is referred to. Then the basis theory and the working principle are introduced.According to breaked blanking principle, implementing means of clamping bar stock is discussed, and the structural design of bar stock breaked blanking is carried out. The virtual development environment and the related technology of breaked blanking mechanism are studied by researching the breaked blanking mechanism. Furthermore, geometric model building, feature model building, parameterization model building, virtual assembly environment, basic steps and basic flow sheet of geometric model building are discussed on emphasis. Based on them, the building of solid model, virtual assembly and interference check are carried out on the components of the breaked blanking equipment using Pro/E.Depending on the related important technology of virtual product development technology, by virtue of CAD/CAE/PDM software, and utilizing virtual building of solid model and situation environment of Pro/E—ADAMS, introducing the basic method of dynamic analysis, importing the model of the breaked blanking machine into Adams from Pro/E by virtue of the interface software—Mechanism/Pro, the dynamics simulation of the clamping process and the blanking process are carried out by importing the model of the breaked blanking machine into Adams from Pro/E with the interface software — Mechanism/Pro. The results indicate that, it is clear the cold cropping can succeed in completing the clamping process, the blanking process and the reset process.

全文目录

目录  5-7
ABSTRACT  7-8
第一章绪论  8-19
  1.1 概述  8-17
    1.1.1 传统断料方式的概述  8-10
    1.1.2 新型断料设备的现状  10-13
    1.1.3 虚拟产品设计的概述  13-17
  1.2 课题的来源、研究目的及意义  17-19
    1.2.1 课题来源  17
    1.2.2 课题研究的内容、路线  17
    1.2.3 课题的目的、意义  17-19
第二章折断机的理论依据及工作原理  19-24
  2.1 几种棒料断裂模型和折断原理  19-21
    2.1.1 旋转弯曲模型  19-20
    2.1.2 逆旋转弯曲模型  20
    2.1.3 三点弯矩模型  20
    2.1.4 双弯矩模型  20-21
  2.2 折断机的理论依据  21-23
    2.2.1 脆性材料单一裂纹的判据  21-22
    2.2.2 脆性材料的线弹性断裂过程的断裂机理  22-23
  2.3 折断机的工作原理  23
  2.4 需解决的技术难点  23-24
第三章折断机的结构设计及三维实体建模  24-45
  3.1 折断机的结构设计  24-27
    3.1.1 棒料夹紧的实现  24
    3.1.2 夹紧与折断连续性的实现  24-25
    3.1.3 对机构折断棒料后复位问题的解决  25-26
    3.1.4 折断机的总体结构  26-27
  3.2 几何建模基础  27-31
    3.2.1 几何建模方法  27-28
    3.2.2 常用的实体造型方法  28-29
    3.2.3 特征造型  29
    3.2.4 参数化设计基础  29-31
  3.3 零件设计的基本步骤及基本流程  31-32
  3.4 折断机机零件模型的建立  32-36
    3.4.1 拉伸件模型的建立  33-35
    3.4.2 旋转件模型的建立  35
    3.4.3 弹簧模型的建立  35-36
  3.5 虚拟装配  36-45
    3.5.1 虚拟装配的定义  36-37
    3.5.2 在Pro/中的虚拟装配  37-45
第四章折断机的动力学仿真分析  45-63
  4.1 动力学分析方法  45-46
    4.1.1 广义坐标的选择  45
    4.1.2 ADMAS多刚体自由度  45-46
    4.1.3 ADAMS动力学方程的建立  46
    4.1.3 动力学方程的求解  46
  4.2 仿真前的准备工作  46-57
    4.2.1 MECHANISM/Pro的设计流程  46-51
    4.2.2 模型导入过程中还应注意的问题  51-52
    4.2.3 ADAMS中还需添加的工作  52-57
  4.3 仿真结果及结果分析  57-63
第五章关键零件的强度分析  63-70
  5.1 关键部件的受力分析  63-64
  5.2 相关的三维有限元理论  64-67
    5.2.1 单元体的选取  64
    5.2.2 六面体刚度矩阵  64-67
  5.3 应力分析的步骤  67-70
    5.3.1 材料特性  68
    5.3.2 单元的选择及划分  68-69
    5.3.3 加载与求解  69-70
第六章总结与展望  70-72
  6.1 总结  70
  6.2 展望  70-72
参考文献  72-77
致谢  77-78
附一: 导入的Marker点表  78-87

棒料折断机构的基本原理与虚拟开发

内容摘要

全文目录

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