【正文】 Y14. R19.N876 G1 N878 Y0.N880 X42. N882 Y14.N884 G2 X23. Y33. R19.N886 G1 X23.N888 G2 X42. Y14. R19.N890 G1 N892 Y0.N894 X42. N896 Y14.N898 G2 X23. Y33. R19.N900 G1 X0.N902 G3 X10. Y43. R10.N904 G1 Y53.N906 Z3.N908 G0 Z50.N910 X10. Y48.N912 N914 G1 Z7.N916 Y38.N918 G3 X0. Y28. R10.N920 G1 X23.N922 G2 X37. Y14. R14.N924 G1 N926 X32. N928 G3 R2.N930 G1 X37. N932 Y14.N934 G2 X23. Y28. R14.N936 G1 X23.N938 G2 X37. Y14. R14.N940 G1 N942 X32. N944 G3 R2.N946 G1 X37. N948 Y14.N950 G2 X23. Y28. R14.N952 G1 X0.N954 G3 X10. Y38. R10.N956 G1 Y48.N958 Z3.N960 G0 Z50.N962 X10. Y43.N964 N966 G1 Z7.N968 Y33.N970 G3 X0. Y23. R10.N972 G1 X23.N974 G2 X32. Y14. R9.N976 G1 N978 N980 G3 R7.N982 G1 X32. N984 Y14.N986 G2 X23. Y23. R9.N988 G1 X23.N990 G2 X32. Y14. R9.N992 G1 N994 N996 G3 R7.N998 G1 X32. N1000 Y14.N1002 G2 X23. Y23. R9.N1004 G1 X0.N1006 G3 X10. Y33. R10.N1008 G1 Y43.N1010 Z3.N1012 G0 Z50.N1014 G91 G28 Z0.(刀具名稱= 6. FLAT ENDMILL 刀具號碼=215 刀徑補(bǔ)正=0 刀長補(bǔ)正=0 刀具直徑=6. 刀角半徑=0. )(加工余量: XY方向=0. Z方向=0. )(工件坐標(biāo)= G54 )N1016 G0 G90 G54 N1018 S0 M5N1020 Z50.N1022 Z10.N1024 G1 Z7. N1026 G3 N1028 N1030 G1 N1032 N1034 N1036 N1038 N1040 N1042 N1044 N1046 N1048 N1050 N1052 N1054 N1056 N1058 N1060 N1062 N1064 N1066 N1068 N1070 N1072 N1074 N1076 N1078 N1080 N1082 N1084 N1086 N1088 N1090 N1092 N1094 N1096 N1098 N1100 N1102 N1104 N1106 N1108 N1110 N1112 N1114 N1116 N1118 N1120 N1122 N1124 N1126 N1128 N1130 N1132 N1134 N1136 N1138 N1140 N1142 N1144 N1146 N1148 N1150 N1152 N1154 N1156 N1158 N1160 N1162 N1164 N1166 N1168 N1170 N1172 N1174 N1176 N1178 N1180 N1182 N1184 N1186 N1188 N1190 N1192 N1194 N1196 N1198 N1200 N1202 N1204 X10. N1206 N1208 N1210 N1212 N1214 N1216 N1218 N1220 N1222 N1224 N1226 N1228 N1230 N1232 N1234 N1236 N1238 N1240 N1242 N1244 N1246 N1248 N1250 N1252 N1254 N1256 N1258 N1260 N1262 N1264 N1266 N1268 N1270 N1272 N1274 N1276 N1278 N1280 N1282 N1284 N1286 N1288 N1290 N1292 N1294 N1296 N1298 N1300 N1302 N1304 N1306 N1308 N1310 N1312 N1314 N1316 N1318 N1320 N1322 N1324 N1326 N1328 N1330 N1332 N1334 N1336 N1338 N1340 N1342 N1344 N1346 N1348 N1350 N1352 N1354 N1356 N1358 N1360 N1362 N1364 N1366 N1368 N1370 N1372 N1374 N1376 N1378 N1380 N1382 N1384 N1386 N1388 N1390 N1392 N1394 N1396 N1398 N1400 N1402 N1404 N1406 N1408 N1410 N1412 N1414 N1416 N1418 N1420 N1422 N1424 N1426 N1428 N1430 N1432 N1434 N1436 N1438 N1440 N1442 N1444 N1446 N1448 N1450 N1452 N1454 N1456 N1458 G3 N1460 N1462 G1 N1464 Y0.N1466 N1468 N1470 G3 N1472 G1 Z3.N1474 G0 Z50.N1476 N1478 Z10.N1480 G1 Z7.N1482 Y0.N1484 N1486 N1488 N1490 N1492 N1494 N1496 G3 R9.N1498 R9.N1500 G1 N1502 N1504 N1506 N1508 N1510 N1512 N1514 N1516 N1518 N1520 N1522 N1524 N1526 N1528 N1530 N1532 N1534 N1536 N1538 N1540 N1542 N1544 N1546 N1548 N1550 N1552 N1554 N1556 N1558 N1560 N1562 N1564 N1566 N1568 N1570 N1572 N1574 N1576 N1578 N1580 N1582 N1584 N1586 N1588 N1590 N1592 N1594 N1596 N1598 N1600 N1602 N1604 N1606 N1608 N1610 N1612 N1614 N1616 N1618 N1620 N1622 N1624 N1626 N1628 N1630 N1632 N1634 N1636 N1638 N1640 N1642 N1644 N1646 N1648 N1650 X15. N1652 G3 N1654 G1 N1656 G3 N1658 G1 N1660 N1662 Z3.N1664 G0 Z50.N1666 G91 G28 Z0.(刀具名稱= 7. DRILL 刀具號碼=17 刀徑補(bǔ)正=0 刀長補(bǔ)正=0 刀具直徑=7. 刀角半徑=0. )(加工余量: XY方向=0. Z方向=0. )(工件坐標(biāo)= G54 )N1668 G0 G90 G54 X29. Y0.N1670 S0 M5N1672 Z10.N1674 G99 G81 Z10. R10. N1676 G80N1678 G91 G28 Z0.(刀具名稱= 8. DRILL 刀具號碼=18 刀徑補(bǔ)正=0 刀長補(bǔ)正=0 刀具直徑=8. 刀角半徑=0. )(加工余量: XY方向=0. Z方向=0. )(工件坐標(biāo)= G54 )N1680 G0 G90 G54 X29. Y0.N1682 S0 M5N1684 Z10.N1686 G99 G81 Z17. R10. F3.N1688 G80N1690 G91 G28 Z0.N1692 M05N1694 M30結(jié)論與體會通過這次畢業(yè)設(shè)計，使我對數(shù)控知識有了更進(jìn)一步的了解，也使自己在學(xué)校期間所學(xué)的知識在實踐當(dāng)中得到了運(yùn)用，在實踐中我學(xué)到了很多在書本上學(xué)不到的知識。 本套夾具用于加工零件的外形及其上面的孔。kP (見《切削手冊》356表)解得 Fz =200 (N)其中CP=52， t=8mm, Sz=, B=8mm, D=63mm, Z=14, kP=(HB/198)在計算切削力時，必須考慮安全系數(shù)。 夾具的設(shè)計 1．定位基準(zhǔn)的選擇由零件圖可知，其設(shè)計基準(zhǔn)為一個比較光滑的面為定位基準(zhǔn)。在總圖中，工件可看作透明體，不遮擋后面夾具上的線條。有動力裝置的夾具，需計算夾緊力。1） 確定工件的定位方案，設(shè)計定位裝置。以零件的第II面為基準(zhǔn)，根據(jù)俯視圖，將第II面上的槽孔切除，之后利用曲面造型，將II面的中間輪廓完成曲面造型的過程。機(jī)床： 加工中心參考文獻(xiàn)[7]表30—31刀具：高速鋼三面刃圓盤銑刀：，D=4mm，齒數(shù)12，此為細(xì)齒銑刀。由查表得鋁合金的粗銑切削速度vc＝200m/min。Ф50槽刀轉(zhuǎn)速650 r/min。依據(jù)刀具性能及經(jīng)驗確定：粗銑的側(cè)吃刀量與背吃刀量為刀具直徑的75%，背吃刀量則可根據(jù)刀具條件與加工條件酌情加減。切削用量的選擇原則是：在保證零件的加工精度和表面粗糙度的前提下，允許充分發(fā)揮刀具的切削性能，保證合理的刀具耐用度并發(fā)揮機(jī)床的性能，最大程度地提高生產(chǎn)率，以降低成本。 硬質(zhì)合金刀具耐高溫，硬度高，主要用于加工硬度較高的工件，硬質(zhì)合金刀具需較高轉(zhuǎn)速加工，（但要注意冷卻，防止忽刀）否則容易崩刀。（2）工件的幾何形狀、加工余量、零件的技術(shù)經(jīng)濟(jì)指標(biāo)。隨著刀具材料性能的提高與結(jié)構(gòu)特性的改善，數(shù)控加工用刀具在耐用度、剛度、抗脆性、斷屑和調(diào)整更換等方面的性能已有很大的的改善。該毛坯為297*226*50mm的鋁板，考慮到單件加工，為了節(jié)省時間選擇通用夾具來完成，由于夾具確定了零件在數(shù)控機(jī)床坐標(biāo)系中的位置，因而根據(jù)要求夾具能保證零件在機(jī)床坐標(biāo)系的正確坐標(biāo)方向，同時協(xié)調(diào)零件與機(jī)床坐標(biāo)系的尺寸。因此程序不能太長，一道工序的內(nèi)容不能太多。機(jī)床設(shè)備和工藝裝備的選擇不僅要考慮設(shè)備投資的當(dāng)前效益，還要考慮產(chǎn)品改型及轉(zhuǎn)產(chǎn)的可能性，應(yīng)使其具有足夠的柔性該圖為