CA6140机床后托架加工工艺及夹具设计

论文编号:JX022  包括设计论文和答辩稿,文献综述,开题报告,任务书和所有设计图纸,字数:17625,页数:51

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

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

目    录

摘   要................................................................... I
ABSTRACT ..................................................................II

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.................... 5
1.4.2 平面的加工.......................................................... 5
1.4.3孔的加工方案 .........................................................5
1.5 确定定位基准 ..........................................................6
1.5.1 粗基准的选择........................................................ 6
1.5.2 精基准选择的原则.................................................... 7
1.6 工艺路线的拟订 ........................................................7
1.6.1工序的合理组合....................................................... 7
1.6.2 工序的集中与分散.................................................... 8
1.6.3 加工阶段的划分...................................................... 9
1.6.4 加工工艺路线方案的比较............................................. 10
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........... 13
1.7.1 毛坯的结构工艺要求................................................. 13
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） ...................................17
1.8.1 工序1：粗、精铣底面................................................ 17
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.................................................. 25
1.8.4 工序4：钻侧面两孔.................................................. 29
1.9 时间定额计算及生产安排 ...............................................31
1.9.1 粗、精铣底面 .......................................................31
1.9.2 镗侧面三杠孔....................................................... 32
1.9.3 钻顶面四孔 .........................................................33
2  专用夹具设计 ..........................................................35
2.1 铣平面夹具设计....................................................... 35
2.1.1 研究原始质料 .......................................................35
2.1.2 定位基准的选择 .....................................................35
2.1.3 切削力及夹紧分析计算............................................... 35
2.1.4 误差分析与计算 .....................................................36
2.1.5 夹具设计及操作的简要说明........................................... 37
2.2 镗孔夹具设计 .........................................................37
2.2.1 研究原始质料....................................................... 37
2.2.2 定位基准的选择..................................................... 37
2.2.3 切削力及夹紧力的计算 ...............................................38
2.2.4 误差分析与计算..................................................... 40
2.3钻顶面四孔夹具设计.................................................... 40
2.3.1 研究原始质料....................................................... 40
2.3.2 定位基准的选择 .....................................................41
2.3.3 切削力及夹紧力的计算............................................... 41
2.3.4 误差分析与计算 .....................................................42
2.3.5 夹具设计及操作的简要说明 ...........................................42
结  论................................................................... 43
参考文献..................................................................44
致  谢 ...................................................................45