4CA6140车床法兰盘加工工艺及夹具设计最终版(2)

2019-04-09 22:53

摘要

CA6140车床后托架加工工艺及夹具设计

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。

关键词工序，工艺，工步，加工余量，定位方案，夹紧力

攀枝花学院本科毕业设计（论文） Abstract

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： The process, worker one, worker's step , the surplus of processing,

orient the scheme , clamp strength

III

摘要......................................................................................................................... II ABSTRACT ................................................................................................................ III

1 CA6140机床后托架加工工艺............................................................................... 3

1.1 CA6140机床后托架的工艺分析 ............................................................................... 3 1.2 CA6140机床后托架的工艺要求及工艺分析 ............................................................. 3 1.2.1 CA6140机床`后托架的技术要求 ...................................................................... 4 1.3 加工工艺过程 ........................................................................................................ 4 1.4 确定各表面加工方案 .............................................................................................. 4 1.4.1 在选择各表面及孔的加工方法时，要综合考虑以下因素 .................................. 4 1.4.2 平面的加工..................................................................................................... 4 1.4.3孔的加工方案 .................................................................................................. 4 1.5 确定定位基准 ........................................................................................................ 5 1.5.1 粗基准的选择 ................................................................................................. 5 1.5.2 精基准选择的原则 .......................................................................................... 6 1.6 工艺路线的拟订 ..................................................................................................... 6 1.6.1工序的合理组合 .............................................................................................. 7 1.6.2 工序的集中与分散 .......................................................................................... 7 1.6.3 加工阶段的划分.............................................................................................. 8 1.6.4 加工工艺路线方案的比较................................................................................ 9 1.7 CA6140机床后托架的偏差，加工余量，工序尺寸及毛坯尺寸的确定..................... 12 1.7.1 毛坯的结构工艺要求..................................................................................... 12 1.7.2 CA6140机床后托架的偏差计算...................................................................... 13 1.8 确定切削用量及基本工时（机动时间）................................................................ 16 1.8.1 工序1：粗、精铣底面 .................................................................................. 16 1.8.2 工序2 粗、半精、精镗CA6140侧面三杠孔................................................. 18 1.8.3 工序3：钻顶面四孔 ..................................................................................... 24 1.8.4 工序4：钻侧面两孔 ..................................................................................... 28 1.9 时间定额计算及生产安排..................................................................................... 30 1.9.1 粗、精铣底面 ............................................................................................... 31 1.9.2 镗侧面三杠孔 ............................................................................................... 31 1.9.3 钻顶面四孔................................................................................................... 32

2 专用夹具设计........................................................................................................ 34

2.1 铣平面夹具设计 ................................................................................................... 34 2.1.1 研究原始质料 ............................................................................................... 34 2.1.2 定位基准的选择............................................................................................ 34 2.1.3 切削力及夹紧分析计算 ................................................................................. 34 2.1.4 误差分析与计算............................................................................................ 35

2.1.5 夹具设计及操作的简要说明 .......................................................................... 36 2.2 镗孔夹具设计 ...................................................................................................... 36 2.2.1 研究原始质料 ............................................................................................... 36 2.2.2 定位基准的选择............................................................................................ 36 2.2.3 切削力及夹紧力的计算 ................................................................................. 37 2.2.4 误差分析与计算............................................................................................ 39 2.3钻顶面四孔夹具设计 ............................................................................................ 39 2.3.1 研究原始质料 ............................................................................................... 39 2.3.2 定位基准的选择............................................................................................ 40 2.3.3 切削力及夹紧力的计算 ................................................................................. 40 2.3.4 误差分析与计算............................................................................................ 41 2.3.5 夹具设计及操作的简要说明 .......................................................................... 41

结论.......................................................................................................................... 41 参考文献...................................................................................................................... 43 致谢.......................................................................................................................... 44

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