左支座钻21孔夹具设计

左支座钻21孔夹具设计

摘 要

在生产过程中，使生产对象（原材料，毛坯，零件或总成等）的质和量的状态发生直接变化的过程叫工艺过程，如毛坯制造，机械加工，热处理，装配等都称之为工艺过程。在制定工艺过程中，要确定各工序的安装工位和该工序需要的工步，加工该工序的机车及机床的进给量，切削深度，主轴转速和切削速度，该工序的夹具，刀具及量具，还有走刀次数和走刀长度，最后计算该工序的基本时间，辅助时间和工作地服务时间。

关键词：工艺规程；定位误差；夹紧；加工余量；夹紧力

ABSTRACT

Enable producing the target in process of production (raw materials, the blank , state of quality and quantity on part become always ) take place direct course of change ask craft course, if the blank is made, machining, heat treatment , assemble etc. and call it the craft course. In the course of making the craft , is it confirm every erector location and worker step that process need this of process to want, the locomotive of processing , this process , and the entering the giving amount of the lathe, cut depth , the rotational speed of the main shaft and speed of cutting, the jig of this process, the cutter and measuring tool, a one hundred sheets of number of times still leaves and a one hundred sheets of length leaves, calculate basic time of this process , auxiliary time and service time of place of working finally.

Keywords：Technical instruction, position error ,clump , the surplus of processing ,clamp strength

左支座钻21孔夹具设计

目 录

摘 要 ................................................................................................................................. I 绪 论 ................................................................................................................................ 1 第1章 车床左支座零件的分析及毛坯的确定 ............................................................ 2

1.1 车床左支座的作用和工艺分析 .................................................................................................... 2 1.1.1 零件的作用 ................................................................................................................................ 2 1.1.2 零件的工艺分析......................................................................................................................... 2 1.2 零件毛坯的确定 ........................................................................................................................... 3 1.2.1 毛坯材料的制造形式及热处理 ................................................................................................. 3 1.2.2 毛坯结构的确定......................................................................................................................... 4

第2章 车床左支座的加工工艺设计 ............................................................................ 5

2.1 工艺过程设计中应考虑的主要问题 ............................................................................................ 5 2.1.1 加工方法选择的原则 ................................................................................................................. 5 2.1.2 加工阶段的划分......................................................................................................................... 5 2.1.3 加工顺序的安排......................................................................................................................... 6 2.1.4 工序的合理组合......................................................................................................................... 7 2.2 基准的选择 ................................................................................................................................... 7 2.2.1 粗基准和精基准的具体选择原则 ............................................................................................. 7 2.2.2 选择本题零件的基准 ................................................................................................................. 8 2.3 机床左支座的工艺路线分析与制定 ............................................................................................ 9 2.3.1 工序顺序的安排的原则 ............................................................................................................. 9 2.3.2 工艺路线分析及制定 ................................................................................................................. 9 2.4 机械加工余量 ............................................................................................................................. 12 2.4.1 影响加工余量的因素 ............................................................................................................... 12 2.4.2 机械加工余量、工序尺寸以及毛坯余量的确定 ................................................................... 12 2.5 确定切削用量及基本工时 .......................................................................................................... 15 2.5.1 工序一 粗铣Ø80H9( 0

0.087

)mm孔大端端面 ........................................................................... 15

2.5.2 工序二 粗镗Ø80H9内孔 ....................................................................................................... 18 2.5.3 工序三 精铣Ø80H9大端端面 ............................................................................................... 19

第3章 专用夹具设计 .................................................................. …… 此处隐藏：12995字，全部文档内容请下载后查看。喜欢就下载吧 ……