快餐合凹模的课程设计说明书.doc

目 录一、 数控机床课程设计目的2二、 数控机床课程设计任务2三、 数控机床课程设计内容2四、 数控机床课程设计要求3五、 数控机床课程设计参考资料3六、 快餐盒凹模的加工工艺4、模具的工艺分析4、选择加工设备4、加工工艺设计4（）模具的工艺分析4（）确定数控编程加工坐标系5（）确定装夹方案5（）确定加工顺序5（）选择加工刀具6（）选择切削用量7七、快餐盒凹模的数控加工程序7一、 数控机床课程设计目的1、 通过这次实践使学生进一步掌握和消化数控技术基本内容。2、 通过这次的设计掌握数控编程的步骤和内容。3、 能够熟练应用CAD/CAM软件，为今后从事数控领域的工作打下基础。二、 数控机床课程设计任务1、 设计题目：简单模具设计及其型腔数控加工程序自动编制。现以快餐盒的凹模设计及其数控加工程序的自动编制为列。2、 所要完成的工作量： （1）零件图 A1 1张 （2）课程设计说明书一份，内容包括课程设计目的，本人的设计任务，设计步骤，工艺及刀具卡片，零件加工程序等内容。三、 数控机床课程设计内容1、 应用Pro/e或UGII等软件设计该模具。2、 根据零件图样要求、毛坯情况，指定加工部位，制定该模具型腔的数控加工工艺。3、 选择所需刀具、确定切削用量。4、 工件坐标系、对刀点和换刀点的选择。5、 采用自动编程软件（如UGII或Pro/e的CAM模块）编制该模具的数控加工程序。四、 数控机床课程设计要求1、 图纸必须符合制图标准，图面应正确、完整、美观，零件应具有良好的工艺性能。2、 工艺卡、刀具卡必须符合规范，切削用量的选择应有技术根据，工件坐标系等的选择应满足加工操作简单、方便计算等要求。3、 说明书按一定的格式单面书写、要求简明扼要、 图文并茂、装订成册。4、 不得抄袭、拷贝网络资源或同学设计内容。五、 数控机床课程设计参考资料1、 朱晓春主编.数控技术.北京:机械工业出版社,2003。2、 张宇主编.数控技术实践.北京:机械工业出版社,2004。3、 邵群涛主编.数控系统综合实践.北京:机械工业出版社,2004。4、 各种UGII和Pro/e应用教材。六、 快餐盒凹模的加工工艺1、 模具的工艺分析该模具的毛坯为45钢，外形尺寸为200mm*300mm*80mm的长方体，模具外形的六个表面在前道工序都已铣削至尺寸，现只需要铣削加工模具的型腔即可。该模具型腔的表面粗糙度为Ra3.2um。2、 选择加工设备由于快餐盒凹模所要加工的型腔都在上表面，根据这个特点，我们选择立式加工中心就可以完成加工。加工表面不多，只需粗铣、半精铣、精铣等工步，所需刀具不超过20把。故选用国产XH714或VTC-16即可满足上述要求。此类机床工作台面为400mm*800mm,X轴行程为600mm，Y轴为400mm ,Z轴为400mm，主轴端面到工作台距离125525mm，定位精度和重复定位精度分别为0.02mm和0.01mm，刀库容量为18把，工件一次站装夹后可自动完成铣、半精铣、精铣等工步的加工。3、 加工工艺设计（1） 确定数控加工程序的编程方法根据模具所要加工的内容比较复杂，而且是三维的，无法手动编程，故数控加工程序选用MasterCAM软件自动编程（2） 确定数控编程加工坐标系为了加工操作简单、方便计算，根据该模具的加工特点，选择模具上表面中心点为数控编程加工坐标系原点。（3） 确定装夹方案选用毛坯的底面和上表面边部不要加工的部位作为定位，用压块从上表面往下夹紧。（4） 确定加工顺序根据快餐盒凹模的型腔特点，按先粗加工去除该模具大部分所要加工的材料，再半精加工、精加工表面，使模具的外形尺寸、表面光粗糙度达到加工要求。具体请见下页的数控加工工序卡片。快餐盒凹模的数控加工工序卡片南昌大学数控自考数控加工工序卡片产品名称零件名称材料图号模具快餐盒凹模45钢10工序号程序编号夹具夹具使用设备车间O0001工步号工步内容刀具号刀具规格mm主轴转速r/mm进给速度mm/min背吃刀量mm1粗加工快餐盒凹模的型腔留余量0.5mmT011260012012半精加工快餐盒凹模的型腔留余量0.2mmT0261000800.33精加工快餐盒凹模的型腔至尺寸T0261600600.2（5） 选择加工刀具 根据快餐盒凹模的型腔特点和尺寸，粗加工选用12mm 键槽刀，半精加工和精加工选用6m球刀。具体请见下面的数控加工刀具卡片。快餐盒凹模的数控加工刀具卡片零件名称快餐盒凹模零件图号10程序编号O0001工步号刀具号刀具名称刀柄型号刀具补尝值mm备注直径mm长度mm1T0112 mm键槽刀BT40-M1-4512实测2T026 mm球刀BT40-M1-456实测 ()选择切削用量查表确定切削速度和进给量，然后计算出机床主轴转速和进给速度，详见上页快餐盒凹模的数控加工工序卡片。七、 快餐盒凹模的数控加工程序第 55 页 共 55 页%O0001(PROGRAM NAME - Kuai can he ao mo)(DATE=DD-MM-YY - 17-03-09 TIME=HH:MM - 14:54)N10G21N20G0G17G40G49G80G90( 12. 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OFF. - 1 LEN. - 1 DIA. - 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6. BALL ENDMILL TOOL - 2 DIA. 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