型腔零件的数控编程加工

济源职业技术学院毕业设计（论文）毕 业 设 计（论 文）题目 型腔零件的数控编程加工 系别 机电系 专业 机电一体化 班级 姓名 学号 指导教师 日期 目 录摘要 3前言 4零件图 51 零件工艺分析.62 设备选择.63 零件装夹方式及加工零点.64 加工顺序.65 刀具选择.76 加工程序.77 3D造型图 49结论50致谢51参考文献52摘 要随着科学技术的迅猛发展，数控机床在生产中大力应用使我国人力市场上出现了数控人才的紧缺现象，为了弥补这个空缺我国职业高等院校开展了类似的社会紧缺型人才的培训教育。经过三年在学校的学习，紧跟社会人才需要，加强我的专业技能，在系部老师的辅导下即将完成学业，在三年中掌握一些必要的机械设计技能，在数控技术方面也有很大的进步所以在我即将毕业之时，我的毕业设计课题就是型腔零件数控编程加工。本次设计综合了我三年所学的各种机械知识，最为重要的是联系大三所学的课程。其中包括了工件的分析，加工工序，刀具选择以及加工程序，程序大部分是使用CAXA制造工程师编制的，之后再手动连接起来。关键字： 工艺 工序 刀具 程序 前 言随着科学技术的迅猛发展，数控机床已经是衡量一个国家机械制造工业水平的重要标志。2001年，我国机床工业产值已进人世界前五名。2001年国内数控金切机床产量已达18万台，比上年增长285，金切机床行业产值数控化率从2000年的174 提高到2001年的227 。2近年来，我国数控机床生产一直保持两位数增长，但与发达国家相比，我国机床数控化率还不高，原因是多方面的，数控人才的匾乏无疑是主要原因之一、由于数控技术是最典型的、应用最广泛的机电光一体化综合技术，我国迫切需要大量的从研究开发到使用维修的各个层次的技术人才2。现在处于生产一线的各种数控人才主要来源：是大学、高职和中职的机电一体化或数控技术应用等专业的毕业生，他们都很年轻，具有不同程度的计算机应用、机械和电气基础理论知识和一定的动手能力，容易接受新工作岗位的挑战。本次毕业设计就是学校综合学生在校三年期间所学对学生专业知识的考核，考察学生是否能够胜任所走向的工作岗位。也是学生对自己专业知识综合运用能力的检验。我们这次设计的题目是型腔零件的数控编程，是以西门子802C数控铣床作为加工机床的，程序按照802C编制的。程序编制主要是使用编程软件编制主要部分及较复杂的程序，后把们插入到主程序中去，在该过程中严格按照先粗后精的原则3。首先用CAXA 制造工程师进行零件图的实体造型，再将工件分解成若干部分，对各个部分进行编程后按加工顺序编排在一起。3因为刚刚接触数控知识，有些地方考虑不周全，在设计中可能会出现错误，敬请老师指正。零件图一 零件图的工艺分析该零件由槽腔、孔、平面、弧面组成。零件的上表面有三个凸台中间的凸台是由多个圆弧组成的轴对称图形。凸台的中心由一个38mm精度为IT8级的贯穿整个工件的孔。孔与凸台的过渡是R10的曲面。空的粗糙度为1.6。平面的右上方是一个70度导圆角的等边三角形右下方是一个16mm的槽粗糙度都是是1.6。平面的左面是一个R85的曲面粗糙度为1.6。中间凸台的两边有两个对称的12mm的孔。二 设备选择由零件外型与对精度的要求选用西门子802C立式数控铣床进行加工。三 零件加工零点及装夹方式工件选用机用平口钳装夹，校正平口钳固定钳口，使之与工作台X轴移动方向平行。在工件下表面与平口钳之间放入精度较高的平行垫块利用木锤或铜棒敲击工件，使垫块不能移动后加紧工件1。工件零点为工件的左下角加工零点是相对坐标为（100，60）。以此为基准加工工件。四 加工顺序 先在普通铣床上加工一个16012010的矩形，上表面粗糙度为1.6，其它表面3.2。后换到数控铣床加工。因为上表面已加工过，所以直接精铣平面，粗加工凸台轮廓，精加工凸台轮廓，孔加工先用钻头钻中心孔，再换铣刀扩孔精加工。换键槽刀加工槽腔因为槽深度较小所以可直接精铣。曲面使用球头铣刀精加工。R85的曲面先加工成凸台再精铣成曲面。数控铣床加工工序卡学院数控培训中心数控加工工序卡产品名称零件名称零件图号01工艺序号程序序号夹具名称夹具编号使用设备01%jpj 机用平口钳西门子802c数控铣床工步号加工内容刀具号刀具规格主轴转速进给速度1精铣平面粗铣凸台轮廓T0110mm立铣刀（高速钢）1000rmin-1200mmmin-12精铣凸台轮廓T0110mm立铣刀（高速钢）1000rmin-1100mmmin-3打孔T0311.8麻花钻1500rmin-1100mmmin-4精加工孔T046键槽铣刀1000rmin-1200mmmin-5精铣槽腔T056键槽铣刀1500rmin-1200mmmin-6精铣曲面T064球头铣刀1500rmin-1200mmmin-五 刀具选择 加工过程中使用的刀具有10mm四槽立铣刀，6mm键槽4mm球头铣刀，11.8mm麻花钻。刀具卡编号刀具名称刀具规格用途T01立铣刀10mm四槽立铣刀铣平面,轮廓T02键槽铣刀6mm键槽挖槽，精精加工孔T03球头铣刀4mm球头铣刀精铣曲面T04钻头11.8mm麻花钻打中心孔六 加工程序备 注N0到N1782 加工平面及凸台轮廓N1784到N2184孔加工N2186到N2350精加工凸台N2352到N2952精铣大孔N2954到N7342精加工曲面SIEMENS802C%_N_XK3311_jpj;$PATH=/_N_jpj_DIR- 8 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