气门摇杆轴支座 说明书

毕业设计（论文）

气门摇杆轴支座机械加工工艺规程及夹具设计

专 业 机械设计制造及其自动化 班 级 2011级机制二班 姓 名 学 号 2011403010234 指导教师 贾伟杰

年 月 日

JINGCHU UNIVERSITY OF TECHNOLOGY 荆楚理工学院毕业设计

I 气门摇杆轴支座机械加工工艺规程及夹具设计

摘 要 本次毕业设计课题是摇杆轴支座加工工艺规程与专用镗孔夹具设计，设计中综合应用了工程图学，机械设计，机械制造工程学，机械几何精度设计等相关课程知识。本毕业设计在摇杆轴支座工艺规程设计过程中，详细的分析了摇杆轴支座的加工工艺，通过工艺方案的比较与分析选择得到了符合技术要求的工序，形成了机械加工工艺过程卡和机械加工工序卡。本设计进行了专用夹具的设计，阐述了定位方案的选择、夹紧方案的确定、夹具体设计，运用AutoCAD完成了此专用夹具的装配图和夹具体的零件图。此外，还进行了摇杆轴支座零件的和镗夹具主要零件三维造型设计。 【关键词】零件加工 工艺规程 专用夹具 AutoCAD 荆楚理工学院毕业设计

II Abstract The graduation design task is design of process and boring fixture of rocker shaft pedestal. This design is comprehensively applied the knowledge of correlated curriculum such as engineering graphic, mechanical design, mechanical manufacturing, engineering and mechanical geometry precision design. This graduation design detailed analysis process of rocker shaft pedestal. Process what is in keeping with technical requirements is selection through comparing and analyzing process scheme, to obtain the machinery process card and mechanical processes card. This design designed boring fixture of rocker shaft pedestal, expounds about the positioning scheme selection, determine the clamping schemes. Boring mould design and fixture pedestal design. Use AutoCAD completed the assembly of this special fixture and part drawing of fixture base. In addition, the 3-D modeling designs of the part of the rocker shaft pedestal. Key Words： Parts processing，Process flow，Internal boring， Dedicated fixture，AutoCAD 荆楚理工学院毕业设计

III 目 录

1 摇杆轴支座机械加工工艺规程设计 ............................................. (1) 1.1零件的图纸与工艺分析 ................................................ (1) 1.1.1零件的作用 .................................................... (1) 1.1.2零件的工艺分析 ................................................ (1) 1.2工艺规程定性设计 .................................................... (2) 1.2.1确定毛坯的类型、制造方法和尺寸及其公差 ........................ (2) 1.2.2机械加工余量、工艺尺寸及毛坯尺寸的确定 ........................ (2) 1.2.3定位基准的选择 ................................................ (3) 1.2.4 表面加工方法的确定 ........................................... (3) 1.2.5 工艺路线的确定 ............................................... (4) 1.2.6确定机械加工余量、工序尺寸及公差 .............................. (5) 1.2.7 机床设备及工艺装备的选用 ..................................... (5) 1.3工艺规程定量设计 .................................................... (6) 1.3.1切削余量及基本工时的确定 ...................................... (6) 2 夹具的设计 ................................................................ (7) 2.1拟定夹具的结构方案 ................................................. (11) 2.1.1选择工序及其分析 ............................................. (11) 2.1.2对夹具的设计要求 ............................................. (11) 2.1.3加工本道工序的加工设备、刀具及量具的选择 ..................... (11) 2.2定位方案及定位元件的选择与设计 ...................................... (11) 2.2.1定位方案的确定 ............................................... (11) 2.2.2定位元件的设计 ............................................... (12) 2.3导向方案及导向元件的选择和设计 ...................................... (12) 2.3.1导向方案 ..................................................... (12) 2.3.2导向元件设计 ................................................. (13) 2.4钻模板设计 ......................................................... (13) 2.5夹紧装置设计 ....................................................... (13) 2.6夹紧力的计算 ....................................................... (13) 2.6.1夹紧力方向的确定 ............................................. (13) 2.6.2夹紧力作用点的选择 ........................................... (13) 2.6.3夹紧力大小的确定 ............................................. (13) 2.7夹具体的设计 ....................................................... (14) 2.8夹具体的选择 ........................................................ (16) 2.9误差分析 ............................................................ (16) 2.10 夹具总图设计....................................................... (17) 2.10.1夹具总图上应标注的尺寸和公差 ..................................... (18) 2.10.2夹具的主要技术要求 ............................................... (18) 结 论 ..................................................................... (20) 致 谢 ...................................................................... (21)