机械制造与自动化毕业设计建筑模型设计与加工.doc

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毕业设计设计题目：建筑模型设计与加工专业：机械制造与自动化班级：09级机械试点班姓名：指导教师：设计时间：2011年10月10~11月11 目录板块一：摘要（绪论） 1. 课题背景 2. 设计内容板块二：建立电火花线切割加工概念 1. 数控电火花线切割加工机床的基本组成 2. 慢速走丝与快速走丝线切割机床的主要区别 3. 电火花线切割加工的原理 4. 正确使用数控电火花线切割机床的外部必备条件板块三：工艺规程设计 1. 分析项目图纸 2. 选择工艺基准和工艺 3. 电极丝的调整板块四：电火花线切割加工工件 1. 装夹工件 2. 工件的调整 3. 线切割机床操作前准备 4. 线切割机床加工操作流程板块五：分析零件质量 1. 分析的方法步骤 2. 快走丝线切割机床影响切割精度的几个主要方面 3. 关于切割条纹起因和措施 4. 关于切割工件表面粗糙度差的原因和对策 5. 快速线切割机床加工过程中断丝原因分析 6. 解决断丝问题的方法板块六：设计总结版块七：致谢老师板块一：摘要绪论制造业是国家经济发展的基础和支柱，制造技术是制造业赖以发展的支撑，是发展竞争优势的有力武器。21世纪是以知识经济和信息社会为特征的时代，制造业正面临着知识、信息、环境和资源的严重挑战，因此，制造业必须使用新技术、新材料和新工艺来满足不断变化的市场需求。本项目我们就通过完成压块零件的加工来学习一门新技术——电火花线切割加工。对于快走丝线切割，电极丝的损耗也是一项重要的指标，要降低电极丝的损耗首先必须减少放电过程中离子对电极丝的轰击作用，并尽量减少电极丝对放电能量的吸收，这就需电极丝表面能快速汽化，使电极丝表面在得到冷却的同时把热能释放回放电通道内，形成汽化压力，从而提高对蚀除产物的排除能力，因此只有保持极间均匀冷却作用才可使工作介质在电极丝表面形成一层吸附膜，以减缓正离子对电极丝有轰击作用，同时通过工作介质自身的挥发带走大量的热量，以降低电极丝的损耗并提高其耐用度。课题背景由于大学三年即将毕业，为了检验我们在校期间的学习成果，学院交给我们一项设计任务，希望我们提高自身的操作水平，增长实践经验，为了以后更好的在社会上发展打下了基础。设计内容运用数控线切割机床，做一个工艺品（两个三层塔，中间有两个桥连接，两边各有一个桥），使我们掌握数控线切割机床，并达到熟练应用。板块二：建立电火花线切割加工概念数控电火花线切割加工机床的基本组成数控电火花线切割加工机床可分为机床主机和控制柜两大部分。（1）控制柜：控制柜中装有控制系统和自动编程系统，能在控制柜中进行自动编程和对机床坐标工作台的运动进行数字控制。（2）机床主机：机床主机主要包括坐标工作台、运丝机构、丝架、冷却系统和床身五个部分。慢速走丝与快速走丝线切割机床的主要区别电火花线切割加工原理电火花切割时，电极丝和工件之间进行脉冲放电。电极丝接脉冲电源的负极，工件接脉冲电源的正极。当接受一脉冲电压时，在电极丝和工件之间产生一次火花放电，在放电通道的中心瞬时温度可高达10000℃以上，高温使工件金属融化，甚至有少量气化，高温也使电极丝和工件之间的工作液部分产生气化，这些气化后的工作液和金属蒸汽瞬间迅速膨胀，并具有爆炸的特性。这种热膨胀和局部微爆炸抛出融化和气化的金属材料而实现对工件材料进行电蚀切割加工。数控快走丝线切割机床的参数及工艺水平产品型号 CTW320TB 工作台尺寸mm 630440 XY工作台行程mm 40320 最大切削厚度mm 300 最大切削锥度/h=100mm 30 电极丝速度m/sec 1.7~11.8 加工精度mm 小于等于0.015 最佳表面粗糙度Ra/um Ra小于等于2.5 重复定位精度(mm) 0.02 最大切学速度mm2/min 大于等于100 正确使用数控电火花线切割机床的外部必备条件电源外接电源为三相50HZ380V。加工时的电压波动绝对值<10％，如波动电压>10％一般需自备稳压电源。工作液必须使用线切割机床专用工作液工作环境机床工作环境需无尘、干燥，无震动、无腐蚀、无大功率电器设备干扰，光线充足，通风良好，室内温度应控制在5ºC--35ºC范围内。板块三：工艺规程设计分析项目绘出以下图纸,产生3B代码：程序 B124B837B837GYL2 B14311B0B14311GXL1 B7155B15723B15723GYL2 B7156B15723B15723GYL3 B124B837B837GYL4 DD B0B4367B4367GYL2 B53648B0B53648GXL1 B0B5000B5000GYL2 B9800B0B9800GXL1 B0B5000B5000GYL4 B22731B0B22731GXL1 B0B2500B2500GYL4 B2700B0B2700GXL1 B0B52200B52200GYL2 B2700B0B2700GXL3 B0B2500B2500GYL4 B22731B0B22731GXL3 B0B5000B5000GYL4 B9800B0B9800GXL3 B0B5000B5000GYL2 B53969B0B53969GXL3 B0B5000B5000GYL4 B9800B0B9800GXL3 B0B5000B5000GYL2 B5200B0B5200GXL3 B0B47200B47200GYL4 B5200B0B5200GXL1 B0B5000B5000GYL2 B9800B0B9800GXL1 B0B5000B5000GYL4 B321B0B321GXL1 B0B4367B4367GYL4 DD B0B3170B3170GYL2 B40051B0B40051GXL1 B0B5000B5000GYL2 B9800B0B9800GXL1 B0B5000B5000GYL4 B12500B0B12500GXL1 B0B2500B2500GYL4 B2700B0B2700GXL1 B0B52200B52200GYL2 B2700B0B2700GXL3 B0B2500B2500GYL4 B12500B0B12500GXL3 B0B5000B5000GYL4 B9800B0B9800GXL3 B0B5000B5000GYL2 B40200B0B40200GXL3 B0B5000B5000GYL4 B9800B0B9800GXL3 B0B5000B5000GYL2 B12500B0B12500GXL3 B0B2500B2500GYL2 B2700B0B2700GXL3 B0B52200B52200GYL4 B2700B0B2700GXL1 B0B2500B2500GYL2 B12500B0B12500GXL1 B0B5000B5000GYL2 B9800B0B9800GXL1 B0B5000B5000GYL4 B149B0B149GXL1 B0B3170B3170GYL4 DD 1. 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B20B1011B1011GYL1 B563B227B563GXL3 B77B33B77GXL3 B19B225B225GYL3 B108B726B726GYL3 B182B660B660GYL3 B289B601B601GYL3 B73B115B115GYL3 B180B488B488GYL1 B158B588B588GYL1 B117B723B723GYL1 B30B449B449GYL1 B313B128B313GXL3 B88B24B88GXL3 B35B8B35GXL2 B67B38B67GXL2 B84B58B84GXL2 B79B55B79GXL2 B23B28B28GYL2 B4B30B30GYL1 B55B21B55GXL2 B264B338B338GYL2 B198B287B287GYL2 B192B198B198GYL3 B16B1516B1516GYL3 B37B1904B1904GYL3 B50B971B971GYL3 B49B326B326GYL3 B69B284B284GYL2 B76B409B409GYL2 B24B208B208GYL2 B25B459B459GYL1 B76B1158B1158GYL1 B77B1698B1698GYL1 B1B96B96GYL1 B216B169B216GXL2 B63B174B174GYL3 B226B514B514GYL3 B249B494B494GYL3 B225B369B369GYL3 B218B314B314GYL3 B215B311B311GYL3 B102B130B130GYL3 B348B740B740GYL1 B7300B0B7300GXL3 B53B427B427GYL4 B131B468B468GYL4 B39B244B244GYL4 B133B212B212GYL3 B299B164B299GXL3 B441B57B441GXL3 B460B91B460GXL2 B371B272B371GXL2 B277B404B404GYL2 B169B480B480GYL2 B96B560B560GYL2 B61B635B635GYL2 B4B888B888GYL2 B76B1331B1331GYL1 B77B1184B1184GYL1 B4B505B505GYL2 B208B56B208GXL2 B334B38B334GXL3 B332B62B332GXL3 B85B18B85GXL3 B0B120B120GYL4 B4B611B611GYL3 B11B1057B1057GYL3 B57B1195B1195GYL3 B145B1021B1021GYL3 B212B864B864GYL3 B186B510B510GYL3 B95B402B402GYL3 B431B939B939GYL3 B452B501B501GYL3 B373B265B373GXL3 B24B270B270GYL3 B31B79B79GYL3 B9B23B23GYL2 B78B412B412GYL2 B65B455B455GYL2 B21B262B262GYL2 B21B472B472GYL1 B66B1098B1098GYL1 B65B1818B1818GYL1 B3B311B311GYL1 B229B201B229GXL2 B294B751B751GYL3 B364B739B739GYL3 B393B673B673GYL3 B370B527B527GYL3 B230B275B275GYL3 B37B100B100GYL1 B181B305B305GYL1 B299B548B548GYL1 B403B866B866GYL1 B317B783B783GYL1 B8281B0B8281GXL3 B151B980B980GYL3 B265B1092B1092GYL3 B337B773B773GYL3 B339B473B473GYL3 B269B196B269GXL3 B147B41B147GXL3 B0B137B137GYL2 B209B105B209GXL1 B266B286B286GYL1 B272B573B573GYL1 B237B736B736GYL1 B160B783B783GYL1 B96B649B649GYL1 B46B347B347GYL1 B23B201B201GYL1 B28B411B411GYL2 B60B282B282GYL1 B25B434B434GYL1 B8B645B645GYL1 B19B672B672GYL2 B58B512B512GYL2 B77B426B426GYL2 B79B436B436GYL2 B177B343B343GYL2 B401B43B401GXL2 B323B576B576GYL3 B105B1372B1372GYL3 B38B1416B1416GYL4 B142B705B705GYL4 B218B257B257GYL4 B71B9B71GXL4 B48B414B414GYL3 B29B1B29GXL3 B198B182B198GXL2 B200B532B532GYL2 B145B806B806GYL2 B49B989B989GYL2 B38B626B626GYL1 B7328B0B7328GXL3 B73B667B667GYL4 B40B1579B1579GYL4 B58B1739B1739GYL3 B191B1344B1344GYL3 B292B842B842GYL3 B38B28B38GXL3 B28B247B247GYL2 B99B229B229GYL1 B133B678B678GYL1 B99B1127B1127GYL1 B32B1671B1671GYL1 B33B1701B1701GYL2 B98B1216B1216GYL2 B173B755B755GYL2 B310B317B317GYL2 B307B318B318GYL3 B164B754B754GYL3 B91B1221B1221GYL3 B30B1698B1698GYL3 B15B1563B1563GYL4 B45B805B805GYL4 B61B428B428GYL4 B60B427B427GYL4 B63B273B273GYL4 B5B298B298GYL3 B233B713B713GYL2 B179B1345B1345GYL2 B59B1737B1737GYL2 B59B1712B1712GYL1 B179B1274B1274GYL1 B229B807B807GYL1 B199B302B302GYL1 B166B37B166GXL1 B168B39

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