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学院毕业设计(论文)
摘 要
后桥是汽车的基本零件之一，后桥主要由主减速器、差速器、半轴、桥壳、轮毂制动鼓总成、制动器等组成，其功能是将万向传动装置传来的发动机扭矩传给驱动车轮。输入的扭矩首先传给主减速器，在此增大扭矩并改变方向，然后经差速器分配给左、右半轴，最后通过半轴外端的法兰盘传给驱动车轮的轮毂。后桥的加工质量直接影响后桥的装配质量，进而影响汽车的使用性能和寿命。
本课题进行汽车后桥钻孔专用夹具设计，主要步骤和内容分为： 1）车桥的毛坯制定。
在分析了车桥的具体结构及其尺寸精度要求的基础上，绘制出毛坯图。 2）车桥总成工艺设计。
在毛坯图的基础上，根据桥壳总成零件图上各尺寸精度要求，详细制定了车桥加工工艺路线 (包括工件定位、夹紧、加工刀具的选择、切削用量的确定、切削力与切削功率的计算等)。
3）钻模夹具的设计。
根据被加工零件的结构特点、加工内容的尺寸和精度要求，确定钻模夹具的配置方案。对钻模夹具进行总体设计，并绘制装配图。 4）气缸的选用。
根据弹簧选中选出合适的汽缸，绘制其零件图。
关键词：车桥;毛坯;工艺;钻模夹具;汽缸
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学院毕业设计(论文)
ABSTRACT
The bridge is one of the basic spare partses of car. The bridge is mainly from lord decelerate machine, the machine, half stalk, bridge hull, round drum system moving with drum total become, making to move machine's etc. to constitute. Its function is ten thousand to spread to move equip to spread of launch machine to twist to pass to drive car wheel.Importation of twist to pass a lord deceleration machine first, at this enlarge twist combine change direction, then through bad soon machine allotment give left and right half stalk, passing half stalk outside carry of the method orchid dish pass to drive a felloe round drum.Empress the bridge process quality direct influence behind bridge of assemble quality, then influence car of usage function and life span.
This topic carry on empress the car bridge to drill a hole the design, main step and contents of the appropriation tongs to is divided into:
1)the semi-finished product establishment of the car bridge.
At analysis the concrete structure of the car bridge and the foundation of the its size accuracy request up, draw a semi-finished product diagram.
2)the car bridge is total to become a technological design.
On the foundation of semi-finished product diagram, according to bridge hull total become spare parts diagram up each size accuracy request, detailed establishment the car bridge process craft route.(include a work piece fixed position and clip tight, process knife of choice, slice to pare dosage really settle, slice to pare dint with slice to pare power of calculation etc.)
3)drilling the design of mold tongs.
According to is processed the structure characteristics of spare parts and process size and accuracy request of contents, assurance drill the allocation project of mold tongs.Carry on a total design towards drilling mold tongs, and draw to assemble diagram.
4)the air cylinder choosing to use.
Pick out cylinder of select the accommodation according to the spring coil, draw its spare parts diagram.
Keyword:Car bridge mi-finished product aft;Drill mold tongs linder
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学院毕业设计(论文)
目录
1绪论 ...................................................................... 1 1.1车桥发展概况 ........................................................... 1 1.1.1车桥发展及其现状 ................................................... 1 1.1.2本论文的主要工作 ................................................... 3 2桥壳加工工艺规程制订 ...................................................... 4 2.1零件的功用 ............................................................. 4 2.1.1车桥结构及其功能 ................................................... 4 2.1.2零件的工艺分析 ..................................................... 6 2.2工艺规程设计 ........................................................... 8 2.2.1确定零件生产类型 ................................................... 8 2.2.2确定零件毛坯的种类及制造方法 ....................................... 9 2.2.3定位基准的选择 ..................................................... 9 2.2.4零件各表面加工顺序的确定 .......................................... 10 2.2.5拟定工艺路线 ...................................................... 10 2.2.6毛坯余量和工序间余量的确定 ........................................ 13 2.2.7驱动桥壳的焊接方案 ................................................ 13 2.2.8桥壳加工热处理工艺要求 ............................................ 16 2.3切削用量和时间定额的确定 .............................................. 18 2.3.1切削用量的选择原则 ................................................ 18 2.3.2切削用量和时间定额 ................................................ 18 3.指定工序夹具设计 ......................................................... 24 3.1钻攻大面夹具工装设计 .................................................. 24 3.1.1机床的选择 ........................................................ 24 3.1.2钻模夹具的选择 .................................................... 24 结论 ....................................................................... 34 致谢 ....................................................................... 35 参考文献 ................................................................... 36 附录 ....................................................... 错误！未定义书签。
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