车床后托架的机械加工工艺及夹具设计
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车床后托架的机械加工工艺及夹具设计(开题报告,中期检查表,论文说明书12500字,CAD图纸8张)
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
Design of Machining Process and Fixture for Back Bracket of The Lathe
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……………………………………………………………………………………1
关键词…………………………………………………………………………………1
1 前言 ………………………………………………………………………………2
2 CA6140 机床后托架加工工艺设计…………………………………………………2
2.1 CA6140机床后托架的结构特点和技术要求……………………………………3
2.2 工艺过程设计中应考虑的主要问题……………………………………3
2.2.1 加工方法选择的原则……………………………………………………3
2.2.2 加工阶段的划分…………………………………………………………3
2.2.3 工序的合理组合…………………………………………………………4
2.3 CA6140机床后托架的机械加工工艺过程分析…………………………………5
2.3.1 CA6140机床后托架零件图分析…………………………………………5
2.4 CA6140机床后托架的加工工艺路线……………………………………………5
2.4.1 主要工序的加工工艺路线产品…………………………………………5
2.4.2 CA6140机床后托架加工工艺路线的确定………………………………6
2.5 CA6140机床后托架的偏差,加工余量,工序尺寸及毛胚尺寸的确
定…………………………………………………………………………………8
2.5.1 毛胚的结构工艺要求……………………………………………………8
2.6 CA6140机床后托架的工序设计…………………………………………………9
2.6.1 工序基准的选择…………………………………………………………9
2.6.2 工序尺寸的确定………………………………………………………10
2.6.3 加工余量的确定………………………………………………………10
2.6.4 确定各工序的加工设备和工艺装备 …………………………………11
2.7 确定切削用量及工时定额 ……………………………………………………12
2.7.1 铣底平面A的切削用量及工时定额……………………………………12
2.7.2 钻、扩、铰、锪孔的切削用量及工时定额……………………………13
3 专用夹具设计 …………………………………………………………………………20
3.1 铣平面夹具设计…………………………………………………………21
3.1.1 研究原始质料……………………………………………………21
3.1.2 定位基准的选择…………………………………………………21
3.1.3 切削力及夹紧分析计算…………………………………………21
3.1.4 误差分析与计算…………………………………………………22
3.1.5 夹具设计及操作的简要说明……………………………………23
3.2 钻顶面四孔的夹具设计…………………………………………………23
3.2.1 研究原始质料……………………………………………………23
3.2.2 定位基准的选择…………………………………………………23
3.2.3 切削力及夹紧分析计算…………………………………………24
3.2.4 误差分析与计算…………………………………………………24
3.2.5 夹具设计及操作的简要说明……………………………………25
4 结论………………………………………………………………………………25
参考文献 ………………………………………………………………………………25
致谢……………………………………………………………………………………26
附录……………………………………………………………………………………26