数控编程与操作技能实训任务书
题目名称基于Mastercam X的零件自动编程（零件见附图）
学生姓名所学专业班级
教师姓名所学专业职称
完成期限 20XX年12月4日至 20XX年12月8 日
一、实训的主要内容
1.零件的工艺分析：确定加工路线、选择刀具和切削用量；
2.利用Mastercam X软件进行面铣、挖槽、外形铣削和钻孔加工，生成刀具轨迹文件；
3.利用Mastercam X软件进行模拟仿真；
4.进行后置处理，生成NC程序；
5.完成设计并撰写不少于3000字的实训总结报告；
6.修改完善实训总结报告，准备答辩。
二、实训报告的基本要求
1. 数控编程与操作实训的要求及任务；
2. 数控编程与操作实训的主要内容（工艺分析过程、编程的操作步骤及操作说明、编程零件的原文件和结果文件、NC程序等）；
3. 数控编程与操作实训的心得体会；
4.参考文献（不少于5篇）。
指导老师意见：
指导老师签名：
2017 年 12月 7 日
目录
第一章实训的目的和要求 (2)
1.1实训的目的 (2)
1.2实训的要求 (2)
第二章工艺过程的设计与加工 (3)
2.1绘制零件图 (3)
2.2设定工件毛坯 (3)
2.3工艺过程分析 (3)
第三章编程步骤及操作说明 (4)
3.1选用平底刀的加工 (4)
3.2选用圆鼻刀的加工 (5)
3.3选用钻头的加工 (6)
第四章刀具路径检查及工件模拟加工 (8)
4.1 刀具路径检查 (8)
4.2 工件的模拟加工 (8)
第五章生成加工NC代码 (9)
第六章实训心得 (24)
第七章参考文献 (26)
第一章实训的目的和要求
1.1实训的目的
本实训主要通过实例介绍了MasterCAM的二维建模及加工。在二维建模加工中，首先建立一个零件模型，然后详尽的介绍了机床的选择、刀具参数设置、材料设置、模拟加工，最后生成NC程序。通过实训, 熟悉和掌握master cam绘图的常用命令与基本的操作方法, 掌握自动编程的过程, 掌握加工参数的设置。能够绘制基本的平面图形和一般机械图样, 并掌握其加工方法。使学生能够了解现代机械加工的发展并掌握较为先进的数控加工技术的应用。
1.2实训的要求
1.零件的工艺分析：确定加工路线、选择刀具和切削用量；
2.利用Mastercam X软件进行面铣、挖槽、外形铣削和钻孔加工，生成刀具轨迹文件；
3.利用Mastercam X软件进行模拟仿真；
4.进行后置处理，生成NC程序；
第二章工艺过程的设计与加工
2.1绘制零件图
在Mastercam X软件中，利用二维绘制附图中的零件图，如图2-1。
图2-1
2.2设定工件毛坯
选择【机床类型】/【铣削】/【默认】命令，选择刀具路径下的【属性】/【材料设置】，设置毛坯为x=120mm，y=120mm，z=25mm，将视角坐标设在x0，y0，z0。
2.3工艺过程分析
2.3.1 确定工艺方案和加工路线
根据图2-1要求和毛坯情况，确定工艺方案和加工路线。
（1）铣上端面
（2）2D挖槽
（3）2D岛屿挖槽
（4）钻深度为20mm的4ｘФ18的盲孔
（5）钻深度为12mm的4ｘФ10的盲孔
2.3.2 刀具的选择
根据加工要求的不同，所选的刀具也有所不同
（1）铣上端面用直径为10的平底刀。
（2）挖槽和岛屿挖槽分别用直径为1,5的圆鼻刀。
2.3.3 确定切削用量
切削用量/切削表主轴转速/（r/min）进给速度/(mm/r) 铣端面2000 700
2D挖槽2400 700
2D岛屿挖槽2000 200
钻孔2000 500
第三章编程步骤及操作说明
粗加工是以快速切除毛坯余量为目的，主要应用于成型结构零件或普通机床难于成形的结构零件。为了提高工作效率，在保证刀具、夹具和机床强度刚性足够的条件下，先将切削深度选大一些，在选取较大的进给量，然后选择适合的切削速度。挖槽粗加工是根据零件形状自动去除材料，大多数用于挖槽加工，如果是凸形加工，则必须创建边界。精加工一般用于粗加工后的工件或铸件的精加工，其目的就是为了精确的将三维模型结构表现出来。根据所用刀具不同，对编程步骤进行如下说明：
3.1选用平底刀的加工
选择【刀具路径】/【平面铣】命令，弹出串连选项边框，选取所要加工面并点击确认，在弹出对话框中新建刀具，刀具为平底刀，刀具参数如图3-1
图3-1
3.2选用圆鼻刀的加工
圆鼻刀一般用于挖槽，和精铣。挖槽时：选择【刀具路径】/【挖槽】命令，弹出串连选项边框，选取所要加工面并点击确认，在弹出对话框中选取圆鼻刀，刀具直径为1mm，刀具参数如图3-3。
图3-3
单击【粗加工/精加工的参数】选项卡，然后按图3-4设置加工参数。
图3-4
2D 挖槽和2D 岛屿挖槽所选用刀具相同，但直径不同，钻孔的深度也不同，粗加工和精加工的参数相同，在刀具选择时已提及，在此不再用图说明。
3.3选用钻头的加工
选择【刀具路径】/【钻孔】命令，弹出串连选项边框，选取所要加工面并点击确认，在弹出对话框中选取刀具，刀具为钻头，刀具参数如图3-5。
图3-5
钻Ф10和Ф17的孔所选用刀具相同，但直径不同，钻孔的深度也不同，在刀具选择时已提及，在此不再用图说明。
选择【刀具路径】/【钻孔】命令，弹出串连选项边框，选取所要加工面并点击确认，在弹出对话框中选取刀具，刀具为钻刀，刀具参数如图3-6。
图3-6
第四章刀具路径检查及工件模拟加工
4.1 刀具路径检查
刀具路径的检查，可以根据图4-1对话框进行更改。
图4-1
且各项意义如下：
（1）：模拟指定的操作；
（2）：验证指定的操作；
（3）：切换选取操作的刀具路径显示；
（4）：后处理指定的操作；
4.2 工件的模拟加工
刀具加工路径生成后，利用MasterCAM系统提供的零件加工模拟功能，可以真实观察实体切削加工的过程，可以看出工艺参数的设置是否合理，零件在数控实际加工中是否存在干涉，设备的运行动作是否正确，实际零件是否符合设计要求。这样可以在实际生产中省去试切的过程，可降低材料消耗，提高生产效率，增加经济效益。在【操作管理器】窗口中单击【选择全部操作】按钮，再按【刀具路径验证】按钮，其最后模拟加工成品图如图4-2所示。
图4-2
第五章生成加工NC代码
在模拟加工确认无误后，利用Masteream X的Post后处理功能，自动生成加工模型所需要的NC代码。点击符号，弹出图5-1后处理程式对话框，点击确认，输入程序名，对图5-2对话框进行保存，得到自动生成的加工程序，如图5-3所示。用户随时可以打开NC程式文件编辑器，对其进行检查和编辑。
图5-1
图5-2
图5-3
加工模型的“孙齐 NC文件”NC代码(部分)如下：
%
O0000(孙齐)
(DATE=DD-MM-YY - 06-12-17 TIME=HH:MM - 15:46)
(MCX FILE - C:\USERS\ASUS\DESKTOP\王宇.MCX-7)
(NC FILE - C:\USERS\ASUS\DESKTOP\孙齐.NC)
(MATERIAL - ALUMINUM MM - 2024)
( T219 | 10. FLAT ENDMILL | H219 | XY STOCK TO LEAVE - 0. | Z STOCK TO LEAVE - 1. )
( T134 | 10. BULL ENDMILL 1. RAD | H134 | XY STOCK TO LEAVE - 0. | Z STOCK TO LEAVE - 1. )
( T214 | 5. FLAT ENDMILL | H214 | XY STOCK TO LEAVE - 0. | Z STOCK TO LEAVE - 1. )
( T110 | 10. DRILL | H110 )
( T190 | 18. DRILL | H190 )
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N2260 X-42.024 Y-48.125
N2270 X-42.673 Y-43.125
N2280 X-48.515 Y-41.875
N2290 X-56.52 Y-40.
N2300 X-56.606 Y-55.625
N2320 X-40.608
N2330 X-41.23 Y-43.75
N2340 X-42.189 Y-41.875
N2350 X-53.901 Y-40.
N2360 X-57.51 Y-38.125
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N2380 X-58.62 Y-58.125
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N2540 X-59.494 Y-29.375
N2550 X-59.625 Y-59.375
N2560 X-60. Y-60.
N2570 Y-70. F119.3
N2580 Y-60. F700.
N2590 X-37.874
N2600 G2 X-38.5 Y-57. I6.874 J3. N2610 G1 Y-44.
N2620 G3 X-44. Y-38.5 I-5.5 J0.
N2630 G1 X-50.293
N2640 G2 X-57.123 Y-34.1 I0. J7.5 N2650 X-60. Y-26.875 I75.123 J34.1 N2660 G1 Y-60.
N2670 G0 Z16.
N2680 X-70. Y48.125
N2690 Z10.
N2700 G1 Z-9. F119.3
N2710 X-60. F700.
N2720 X-50.625
N2730 X-51.625 Y46.875
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N2760 X-51.625
N2770 Y46.875
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N2830 Y45.625
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N2890 Y44.375
N2900 X-54.625 Y43.125 N2910 X-51.912
N2920 X-44.782 Y45.
N2930 X-44.351 Y45.625 N2940 X-43.864 Y53.125 N2950 X-54.625
N2960 Y43.125
N2970 X-55.625 Y41.25 N2980 X-47.426 Y43.125 N2990 X-43.43 Y44.375 N3000 X-42.781 Y54.375 N3010 X-55.625
N3020 Y41.25
N3030 X-56.625 Y39.375 N3040 X-54.545 Y40.625 N3050 X-42.509 Y43.125 N3060 X-41.698 Y55.625 N3070 X-56.625
N3080 Y39.375
N3090 X-57.625 Y37.5 N3100 X-53.661 Y40.
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N4340 X52.625
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N4360 X50.478
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N4380 X46.031 Y-50.625
N4390 X44.947 Y-51.875
N4400 X53.625
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N4420 X51.09
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N4440 X44.947 Y-51.875
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N4490 X44.781 Y-45.
N4500 X44.351 Y-45.625