毕业设计（论文）-复合钻头的设计有限元分析（全套图纸）.docVIP

PAGE 22 PAGE 7分 类 号 密 级 宁毕业设计(论文)复合钻头的设计和有限元分析所在学院机械与电气工程学院专 业机械设计制造及其自动化班 级11机自x班姓 名学 号指导老师 2015 年 3 月 31 日 PAGE 21摘 要复合钻头组由复合钻头体、复合钻头大头盖、复合钻头小头衬套、复合钻头大头轴瓦和复合钻头螺栓（或螺钉）等组成。复合钻头组承受活塞销传来的气体作用力及其本身摆动和 HYPERLINK /subview/40982htm \t /_blank 活塞组往复惯性力的作用，这些力的大小和方向都是周期性变化的。因此复合钻头受到压缩、拉伸等交变载荷作用。复合钻头必须有足够的疲劳强度和结构刚度。疲劳强度不足，往往会造成复合钻头体或复合钻头螺栓断裂，进而产生整机破坏的重大事故。若刚度不足，则会造成杆体弯曲变形及复合钻头大头的失圆变形，导致偏磨。关键词：复合钻头，强度全套图纸，加153893706AbstractThe link group comprises a connecting rod, the connecting rod cover, connecting rod bushing, connecting rod bearing and rod bolts (or screws). The connecting rod group under gas force piston pin came and its swing and piston reciprocating inertia forces, the magnitude and direction of these forces are cyclical changes. The connecting rod by compression, stretching and alternating load. The connecting rod must have enough fatigue strength and structural stiffness. The fatigue strength is insufficient, often caused by fracture of connecting rod or the connecting rod bolt, resulting in destruction of the major accident. If the lack of rigidity, it will cause deformation of round rod bending deformation and the connecting rod, piston, cylinder, cause partial grinding bearing and crank pin.Key Words: rice thresher threshing; improved design;目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc414700856 摘 要 PAGEREF _Toc414700856 \h III HYPERLINK \l _Toc414700857 Abstract PAGEREF _Toc414700857 \h IV HYPERLINK \l _Toc414700858 目 录 PAGEREF _Toc414700858 \h V HYPERLINK \l _Toc414700859 第1章 绪论 PAGEREF _Toc414700859 \h 1 HYPERLINK \l _Toc414700860 第2章 复合钻头轴承结构介绍 PAGEREF _Toc414700860 \h 2 HYPERLINK \l _Toc414700861 2.1 复合钻头工作原理 PAGEREF _Toc414700861 \h 2 HYPERLINK \l _Toc414700862 2.2复合钻头总体设计 PAGEREF _Toc414700862 \h 3 HYPERLINK \l _Toc414700863 2.2.1复合钻头的类型定位 5 HYPERLINK \l _Toc414700864 2.2.2 复合钻头的整机结构及选择 7 HYPERLINK \l _Toc414700865 2.2.3 复合钻头复合钻头的工作流程 9 HYPERLINK \l _Toc414700866 第3章 复合钻头结构设计 11 HYPERLINK \l _Toc41