飞行器CADCAM技术大作业18号零件Word文件下载.docx

1、首先，通过拉伸得到“毛坯”，结果如下：图3 拉伸基体接着，通过“拉伸”方法，并选择“求差”选项，建出上层廓形。图4 拉伸切除得到上层外廓然后，再次采用“拉伸”特征，并求差，切出圆弧槽。图5 切出圆弧槽最后，采用“孔”特征，直接在上表面上插入两个12mm深30mm的钻孔。至此，建模过程完毕。图6 插入孔3.数控代码生成点击UG NX 7.5软件界面左上角的“开始”，将软件环境由之前的“建模”切换到“加工”，在弹出的加工类型选项框中选择“general_cam”和“mill_contour”，软件即进入如下的加工界面：图7 进入加工界面点击下方的“几何视图”，点按“MCS_MILL”前的“+”号，

2、展开后即可看到“WORKPIECE”，右键单击，在弹出的菜单中选择“编辑”，即可进入如下“铣削几何体”设置界面：图8 铣削几何体设置从上到下依次制定加工对象、设置毛坯尺寸，设置毛坯时点选“自动块”方式，可以自动以长方体包络当前零件模型，考虑上表面需要进行铣削，留出加工余量，所以“ZM+”设为2mm。点击下方的“加工方法视图”，可见软件已自动识别特征并排定加工工序：先粗铣，再半精铣，然后精铣，最后钻孔，但是由于该零件不需要精铣，所以我们可以从加工工序中删除“精铣”工序。图9 加工方法视图进入“加工”模式时之所以选择“MILL_CONTOUR”，是因为零件的主要加工方法都是z向铣削廓形，但是为了保

3、证上表面粗糙度和深度尺寸的准确度，需要先对毛坯上表面进行平面粗铣和半精铣，所以右击“未用项”“插入”“操作”，弹出如下“创建操作”界面：图10 创建操作选取“mill_planar”，具体加工类型选择“face_milling”，点确定后自动进入加工参数设置界面，刀具选择直径10mm的端铣刀，因为不用换刀，所以直接在工序内设置一步粗铣，铣削量1.5mm，一步半精铣，铣削量0.5mm，生成的刀轨如下图：图11 面铣刀轨粗铣上层外廓形，加工方法为“solid_profile_3d”选取直径12mm端铣刀，深度和厚度方向各进给6次，余量1mm，生成的刀轨如下所示：图12 外廓刀轨粗铣圆弧槽，加工方法

4、为“cavity_mill”，余量为1mm，刀具为直径8mm端铣刀，选取“深度优先”以便先加工完一个槽后再进入下一个槽的加工。刀轨如下：图13 弧槽铣刀轨半精铣上层外廓，为减少换刀次数，仍使用弧槽铣削的刀具，侧向的进给量设置为0.5mm，进刀2次；深度方向余量0.8mm，一次深切即可。生成的刀路轨迹如下：图14 半精铣外廓刀轨最后是钻两个直径12mm的孔，选取直径12mm的直柄麻花钻钻出两个孔即可，刀轨如下：图15 钻孔刀轨至此，数控加工的所有工艺参数设置完毕。4.生成的数控代码切换到“程序顺序视图”，可以看到自上而下列出的加工工序，在后处理前，工序列前面有一个黄色的感叹号。后处理生成数控代码

5、后，黄色感叹号会变成一个绿色的对号，表示处理完成。图16 程序顺序视图右击某一个工步，点选“后处理”，即可生成相应工步的数控加工程序，选择所有工步后右击，点选“后处理”，即可得到整个加工过程的数控程序代码。为方便查看，以下按加工工序列出相应数控代码，由于代码行数太多，只列出前20行和后20行。铣上表面%N0010 G40 G17 G90 G70N0020 M00N0030 G0 X2.0788 Y-1.7369 S0 M03N0040 G43 Z2.874 H00N0050 Z2.5492N0060 G1 Z2.4311 F9.8 M08N0070 X1.8469N0080 X-1.8469N

6、0090 G2 X-1.9546 Y-1.5053 I.4689 J.3589N0100 G1 X1.9546N0110 G3 X1.9685 Y-1.378 I-.5766 J.1273N0120 G1 Y-1.2737N0130 X-1.9685N0140 Y-1.0421N0150 X1.9685N0160 Y-.8106N0170 X-1.9685N0180 Y-.579N0190 X1.9685N0200 Y-.3474/*此部分略去*/N0650 X-1.9685N0660 Y.3474N0670 X1.9685N0680 Y.579N0690 X-1.9685N0700 Y.81

7、06N0710 X1.9685N0720 Y1.0421N0730 X-1.9685N0740 Y1.2737N0750 X1.9685N0760 Y1.378N0770 G3 X1.9546 Y1.5053 I-.5905 J0.0N0780 G1 X-1.9546N0790 G2 X-1.8469 Y1.7369 I.5766 J-.1273N0800 G1 X1.8469N0810 X2.0788N0820 Z2.5N0830 G0 Z2.874N0840 M02粗铣外廓形N0030 G0 X1.378 Y2.3425 S0 M03N0040 G43 Z2.7559 H00N0050 Z

8、2.3228N0060 G1 Z2.2047 F9.8 M08N0070 G2 X1.4309 Y2.3401 I0.0 J-.5708N0080 G1 X1.5667 Y2.3267N0090 X1.7481 Y2.2716N0100 X1.8281 Y2.2289N0110 G2 X1.9838 Y1.9838 I-.1392 J-.2604N0120 X2.2273 Y1.831 I-.0153 J-.2949N0130 G1 X2.275 Y1.737N0140 X2.3267 Y1.5667N0150 X2.3403 Y1.4278N0160 G2 X2.3425 Y1.378 I-

9、.5686 J-.0498N0170 G1 Y-1.378N0180 G2 X2.3398 Y-1.4339 I-.5708 J0.0N0190 G1 X2.3267 Y-1.5667N0200 X2.2716 Y-1.7481N5420 G0 Z2.7559N5430 X2.277 Y2.1217N5440 Z1.6929N5450 G1 Z1.5748N5460 X2.0655 Y2.0086N5470 G3 X1.9685 Y1.6889 I.1113 J-.2084N5480 G1 X1.9975 Y1.6346N5490 X2.0357 Y1.5088N5500 X2.0459 Y1

10、.405N5510 G2 X2.0472 Y1.378 I-.2742 J-.027N5520 G1 Y-1.378N5530 G2 X2.0459 Y-1.405 I-.2755 J0.0N5540 G1 X2.0357 Y-1.5088N5550 X1.9975 Y-1.6346N5560 X1.9685 Y-1.6889N5570 G3 X2.0655 Y-2.0086 I.2083 J-.1113N5580 G1 X2.277 Y-2.1217N5590 Z1.6929N5600 G0 Z2.7559N5610 M02铣弧槽N0020 G91 G28 Z0.0N0030 T00 M06

11、N0040 G0 G90 X-.1098 Y-1.259 S0 M03N0050 G43 Z2.8346 H00N0060 Z2.5591N0070 G3 X-.1417 Y-1.1693 Z2.3465 I.1098 J.0897 K.038 F9.8N0080 G1 X0.0 M08N0090 G3 X.8064 Y-.8467 I0.0 J1.1693N0100 X.7684 Y-.8068 I-.019 J.0199N0110 G2 X-.7684 I-.7684 J.8068N0120 G3 X-.8064 Y-.8467 I-.019 J-.02N0130 X0.0 Y-1.169

12、3 I.8064 J.8467N0140 G1 Y-1.3268N0150 G3 X.915 Y-.9608 I0.0 J1.3268N0160 X.6598 Y-.6928 I-.1276 J.134N0170 G2 X-.6598 I-.6598 J.6928N0180 G3 X-.915 Y-.9608 I-.1276 J-.134N0190 X0.0 Y-1.3268 I.915 J.9608N0200 G1 Y-1.1693N1860 G2 X.7684 I.7684 J-.8068N1870 G3 X.8064 Y.8467 I.019 J.02N1880 X0.0 Y1.1693

13、 I-.8064 J-.8467N1890 G1 Y1.3268N1900 G3 X-.915 Y.9608 I0.0 J-1.3268N1910 X-.6598 Y.6928 I.1276 J-.134N1920 G2 X.6598 I.6598 J-.6928N1930 G3 X.915 Y.9608 I.1276 J.134N1940 X0.0 Y1.3268 I-.915 J-.9608N1950 G1 Y1.1693N1960 Y1.3583N1970 G3 X-.9367 Y.9836 I0.0 J-1.3583N1980 X-.6381 Y.67 I.1493 J-.1568N1

14、990 G2 X.6381 I.6381 J-.67N2000 G3 X.9367 Y.9836 I.1493 J.1568N2010 X0.0 Y1.3583 I-.9367 J-.9836N2020 G1 Y1.2008N2030 Z2.1811N2040 G0 Z2.8346N2050 M02半精铣外廓形N0030 G0 X1.2352 Y2.126 S0 M03N0050 Z1.6929N0060 G1 Z1.5748 F9.8 M08N0070 X1.2346 Y2.1126N0080 G3 X1.3854 Y1.9487 I.1573 J-.0066N0090 G2 X1.3866

15、 Y1.9486 I-.0074 J-.177N0100 G1 X1.4339 Y1.9463N0110 X1.4894 Y1.9381N0120 X1.5437 Y1.9244N0130 X1.5965 Y1.9056N0140 X1.6472 Y1.8816N0150 X1.6952 Y1.8528N0160 X1.7402 Y1.8194N0170 X1.7818 Y1.7818N0180 X1.8194 Y1.7402N0190 X1.8528 Y1.6952N0200 X1.8816 Y1.6472N1560 X-1.8874 Y1.589N1570 X-1.8642 Y1.6379

16、N1580 X-1.8364 Y1.6843N1590 X-1.8042 Y1.7277N1600 X-1.7678 Y1.7678N1610 X-1.7277 Y1.8042N1620 X-1.6843 Y1.8364N1630 X-1.6379 Y1.8642N1640 X-1.589 Y1.8874N1650 X-1.538 Y1.9056N1660 X-1.4855 Y1.9187N1670 X-1.432 Y1.9267N1680 X-1.3857 Y1.9289N1690 G2 X-1.378 Y1.9291 I.0077 J-.1572N1700 G1 X1.378N1710 G3 X1.5354 Y2.0866 I0.0 J.1575N1720 G1 Y2.0889N1730 Z1.6929N1740 G0 Z2.7559N1750 M02钻孔N0040 G0 G90 X-1.378 Y-1.378 S0 M03N0050 G43 Z2.4803 H00N0060 G81 Z1.0392 R2.4803 F9.8N0070 X1.378 Y1.378N0080 G80N0090 M02