XZ25 50 变速箱工艺及钻床夹具设计.doc
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1、XZ25-50 变速箱工艺及钻床夹具设计Design of XZ25-50 Gearbox Technology and Drilling Fixture学生 姓 名 学院 名 称 专业 名 称 指导 教 师 机电 工 程 学 院 机械 设 计 制 造 及 其 自 动 化 2008年5月29日 摘要应用组合机床加工大批量零件,快捷高效,生产效率高是机械加工的发展方向。本次 设计任务是制定箱体结合件的加工工艺、组合钻孔工序的工装设计、液压控制系统设计、 组合机床设计。 在工艺制定过程中,通过生产批量的分析确定箱体结合件的加工方案,并寻求最佳的 工艺方案,借此说明了工艺在生产过程中的重要性;在组合
2、钻孔工序的工装设计过程中, 结合实例,介绍了夹具设计方法,特别是对孔的加工精度进行了探讨。 变速箱箱体零件的主要加工表面是平面及孔系。一般来说,保证平面的加工精度要比 保证孔系的加工精度容易。因此,本设计遵循先面后孔的原则。并将孔与平面的加工明确 划分成粗加工和精加工阶段以保证孔系加工精度。基准选择以变速箱箱体的输入轴和输出 轴的支承孔作为粗基准,以底面与两个工艺孔作为精基准。主要加工工序安排是先以支承 孔系定位加工出顶平面,再以顶平面与支承孔系定位加工出工艺孔。在后续工序中除个别 工序外均用顶平面和工艺孔定位加工其他孔系与平面。支承孔系的加工采用的是坐标法镗 孔。整个加工过程均选用组合机床。
3、夹具选用专用夹具,夹紧方式多选用气动夹紧,夹紧 可靠,机构可以不必自锁。因此生产效率较高。适用于大批量、流水线上加工。能够满足 设计要求。 关键词 组合机床;加工工艺;钻夹具;液压传动 I徐州 工 程 学 院 毕 业 设 计 (论文 )Abstract This paper introduces the design of the box joint part of carding machine drill combination machine,which is widely used for its high efficiency. This design task includes f
4、ive parts: working out processing technology of joint part of carding machine, design and assemble of drilling jig, design and assemble of ma in spind le box, design combination machine tool. During process pla nning, define the productive process of joint part of carding machine and find out the be
5、st process pla n by analyzing production lot, which show process pla nning is very important in product process; this paper introduces exper iences of attachment design by using a practica l exampleThe ma in machining surface of the car gearbox parts is the pla ne and a series of hole. Generally spe
6、aking, to guara ntee the working accuracy of the pla ne is easier tha n to guara ntee the hole s. So the design follows the principle of pla ne first and hole second. And in order to guara ntee the working accuracy of the series of hole, the machining of the hole and the pla ne is clearly divided in
7、to rough machining stage and finish machining stage. The supporting hole of the input bearing and output bearing is as the rough datum. And the top area and two technologica l holes are as the finish datum. The ma in process of machining technology is that first, the series of supporting hole fix an
8、d machine the top pla ne, and then the top pla ne and the series of supporting hole fix and machine technologica l hole. In the follow-up working procedure, all working procedures except severa l specia l ones fix and machine other series of hole and pla ne by using the top pla ne and technologica l
9、 hole. The machining way of the series of supporting hole is to bore hole by coordinate. The combination machine tool and specia l-purpose cla mping apparatus are used in the whole machining process. The cla mping way is to cla mp by pneumatic and is very helpful. The instruction does not have to lo
10、ck by itself. So the product efficiency is high. It is applicable for mass working and machining in assembly line. It can meet the design bination machine tool Keywords axle boxes IIhandicra ft drills cla mp 目 录 1 绪论 . 42.1 XZ25-50 变速器壳体的用途. 52.2 零件的工艺分析. 52.3 确定箱体的生产类型. 52.4 确定箱体毛坯制造形式和尺寸. 52.4.1 确
11、定毛坯的制造种类和制造方法. 52.4.2 毛坯余量和工序余量的确定. 52.5 定位基准的选择. 62.5.1 粗基准的选择. 62.5.2 精基准的选择. 62.6 确定箱体零件各加工表面的加工方案. 62.7 确定工艺方案的原则及注意问题. 62.7.1 粗、精加工阶段分开原则. 72.7.2 工序集中和分散原则. 72.7.3 制定工艺方案应注意的其它方面. 82.8 工艺路线的确定. 82.9 确定各表面的切削用量和基本工时. 92.9.1 工序 50 粗精铣上表面. 92.9.2 工序 60 钻上表面各螺纹底孔以及孔. 92.9.3 工序 70 攻上表面各螺纹以及铰孔. 102.9
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