设计简介
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
目 录.... 1
1 后托架加工工艺.... 3
1.1 后托架的工艺分析... 3
1.2 后托架的工艺要求及工艺分析... 3
1.2.1 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... 6
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 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 后托架的偏差计算... 12
1.8 确定切削用量及基本工时(机动时间)... 16
1.9 时间定额计算及生产安排... 30
2 铣底面专用夹具设计.... 34
2.1 铣底面夹具设计... 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... 36
2.1.5 夹具设计及操作的简要说明... 37
结 论.... 37
参考文献.... 39
致 谢.... 40