发动机连杆机械加工工艺设计.docx

毕业设计（论文） 题 目:发动机连杆机械加工工艺研究 院 系: 专业班级: 学 号: 姓 名: 指导老师: 教务二处制 摘 要 连杆是汽车发动机中重要的组成部分，本文主要论述了发动机连杆的机械加工工艺。连杆主要是把活塞和曲轴连接起来，使活塞的往复直线运动转换为曲轴的旋转运动。连杆承受的是冲击动载荷，因此要求连杆刚度和强度。由于连杆既是传动零件又是运动件，须综合材料选用、结构设计。在对其设计中我们先对连杆工艺过程分析，联系实际通过对其具体设计的了解进行连杆机械加工工艺过程分析及其机械加工余量、工序尺寸的确定。 关键词：连杆；工艺设计；加工余量；工序尺寸 Abstract Automotive engine connecting rod is an important part of this paper discusses the machining process of engine connecting rod. The main link is connected to the piston and the crankshaft, so that the reciprocating linear motion of the piston is converted to rotary motion of the crankshaft. Link to withstand the impact of dynamic load, thus requiring the link stiffness and strength. Since both the transmission link is part of moving parts, must be integrated material selection, structural design. In its design, we first link process analysis, and practice by conducting rod machining process analysis and mechanical allowance, the process to determine the size of their understanding of the specific design. Keywords: Link; Process design; Allowance 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc478060202 摘 要 PAGEREF _Toc478060202 \h I HYPERLINK \l _Toc478060203 目 录 PAGEREF _Toc478060203 \h I HYPERLINK \l _Toc478060204 1绪 论 PAGEREF _Toc478060204 \h 1 HYPERLINK \l _Toc478060205 1.1 设计的主要研究内容 PAGEREF _Toc478060205 \h 1 HYPERLINK \l _Toc478060206 1.2 加工工艺设计的目的及意义 PAGEREF _Toc478060206 \h 1 HYPERLINK \l _Toc478060207 2 汽车连杆机械加工工艺设计 PAGEREF _Toc478060207 \h 2 HYPERLINK \l _Toc478060208 2.1 连杆的结构特点及作用 PAGEREF _Toc478060208 \h 2 HYPERLINK \l _Toc478060209 2.2 连杆的主要技术要求 PAGEREF _Toc478060209 \h 3 HYPERLINK \l _Toc478060210 2.2.1 大、小头孔的尺寸精度、形状精度 PAGEREF _Toc478060210 \h 3 HYPERLINK \l _Toc478060211 2.2.2 大、小头孔中心距 PAGEREF _Toc478060211 \h 4 HYPERLINK \l _Toc478060212 2.3 连杆的材料和毛坯 PAGEREF _Toc478060212 \h 4 HYPERLINK \l _Toc478