教案：数控铣床【项目二】任务三-外轮廓铣削加工

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1、重庆市永川职业教育中心教师统一备课用纸科目数控铳床班级数控11级时间2012.12课时4课题:【项目二】任务三外轮廓铳削加工教学掌握外轮加工的工艺目标教材重难点：根据工艺编制合理的程序分析I.导入语教学过程⑷00弧进给G02/G03格式:fGO21G，9]GO3lY说明：G02：顺时针圆弧插补（如图3310所示）：GO3：逆时针圆弧插补（如图3.3.10所示）:G17：XT平面的圆弧；G18：ZY平面的圆弧；G19：KZ平面的圆弧。X,Y,Z：G90时为圆弧终点在工件坐标系屮的坐标：G91时为圆弧终点相对于圆弧起点的位移量°I,J,K：圆心相对于圆弧起点的有向距离。（见图

2、33.11）无论绝对或增量编程时都是以增量方式指定:整圆编程时不可以使用凡只能用人J・KaR：圆弧半径。当圆弧圆心角小于180。为劣弧时，R为正值：当圆弧圆心角人于1X0。为优弧时，R为负值。F：被编程的两个轴的合成进给速度。注：不是整圆编程时，定义R方式与定义1、J、K方式只需选择—种。当两种方式都定义.以R方式有效。谢3.3.10不阿平面的GO2埒GO3选择II、新授课一、根据平面图构建立体图二、根据立体图编制合理加工程序%0003N10TOM6N12G90G54GOX—45.Y-57.5S3000M03N14G43HOZ100.M07N16Zl.N18G01Z-4.

3、F1000N20Y-50.F1200N22Y50.F2000N24G17G02X-40.Y55.15.JO.N26G01X40.N28G02X45.Y50.10.J-5.N30G01Y-50.N32G02X40.Y-55.1-5.JO.N34G01X-40.N36G02X-45.Y-50.10.J5.N38G01X-42.898Y-49.OilF1200N40G02X-45.Y-43.89149.901J23.475F2000N42G01Y50.N44G02X-40.Y55・I5・JO.N46GO1X40.N48G02X45.Y50.IO.J—5.N50GO1Y-50.N

4、52G02X40.Y-55.1-5.JO.N54GO1X-39.613N56G02X-42.898Y-49.011146.616J29.464N58GO1X-40.183Y-47.734F1200N60G02X-45.Y-29.405147.186J22.198F2000N62G01Y-21.666N64G02X-44.096Y-15.137152.003J-3.87N66X-45.Y-14.515129.066J43.181N68G01Y50.N70G02X-40.Y55.15.JO.N72G01X40.N74G02X45.Y50.IO.J-5.N76G01Y-50.N

5、78G02X40.Y-55.1-5.JO.N80G01X-36.022N82G02X-40.183Y-47.734143.025J29.464N84G01X-37.469Y-46.457F1200N86G02X-40.71Y-13.75144.472J20.921F2000N88X-45.Y-10.789125.679J41.793N90G01Y50.N92G02X-40.Y55.15.JO.N94G01X40.N96G02X45.Y50.10.J-5.N98G01Y-50.N102G01X-32.332N106G01X-34.754Y-45.18F1200N108G02

6、X-37.21Y-12.316141.757J19.644F2000NUOX-45.Y-6.922122.179J40.359N112GO1Y50.N114G02X-40.Y55.15.JO.N116GO1X40.N118G02X45.Y50.IO.J—5.N120GO1Y-50.N122G02X40.Y-55.1-5.JO.N124GO1X-28.513N126G02X-34.754Y-45.18135.516J29.464N128GO1X-32.039Y-43.903F1200N130G02X-33.556Y-10.819139.042J18.367F2000N132

7、X-45.Y-2.864118.526J38.862N134G01Y50.N136G02X-40.Y55.15.JO.N138G01X40.N140G02X45.Y50.IO.J-5.N142G01Y-50.N144G02X40.Y-55.1-5.JO.N146G01X-24.49N148G02X-26.075Y-53.24123.714J22.949N150X-32.039Y-43.903133.078J27.704N152G01X-29.325Y-42.626F1200N154G02X-29.684Y-9.232136.3