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简答题 编程题: 用数控车床加工如图所示零件,材料为45号钢调质处理,ø50外圆已经加工到尺寸。毛坯留出外圆和内孔的加工余量均为0.4mm(X向)和O.1mm(Z向)。钻头直径为8mm,螺纹加工用G92指令。X向加工4个90°均布孔,使用直径8mm的键槽铣刀加工。工件程序原点如图示。按要求完成零件的加工程序编制。 (1)加工程序使用固定循环指令; (2)对所选用的刀具规格、切削用量等作简要工艺说明; (3)加工程序单要字迹工整。 说明:X向4个90°均布ø8孔可以不进行加工,但将扣去2分。
  • 根据题意刀具规格、切削用量选择见下表:

    加工程序如下:(采用FANUC系统)
    00001;程序名
    M41;
    G50S1500:
    N1;工序I:端面车削
    G0G40G99S400T0808M04F0.1;
    X62.0Z0;
    G96S120;
    G01X0;
    G0G97S500Z50.0;
    G28U0W0TOM05;
    N2;工序Ⅱ:打中心孔
    G0G40G97G99S800M04T0101F0.02;
    X0Z2.0;
    G74R0.2;打中心孔时,每次退刀量为0.2mm
    G74Z-5.0Q2000中心孔深5mrn,每次钻削深度2mm
    G28U0W0T0M05;
    N3;工序Ⅲ:钻孔(钻头直径为8mm)
    G0G40G97G99S250M04T0303F0.2;
    X0Z2.0;
    G74R1.0;钻孔时每次退刀量为1mm
    G74Z-20.0Q3000;孔深20mm,每次钻孔深度3mm
    G28U0W0TOM05;
    N4;工序Ⅳ:外圆粗加工
    G0G40G97G99S400M04T0202F0.25
    X64.0Z2.0;
    G71U2.0R0.5;
    G71P10Q11U0.4W0.1;
    N10G0G42X16.0;
    G01Z0;X36.0;
    X40.0Z-16.O;
    Z-40.0;
    X60.0Z-50-0;
    Z-60.0;
    N11G01G40X64.0;
    G28U0W0T0M05;
    N5;工序V:内径粗加工
    G0G40G97G99S350T0707M04F0.2;
    Z16.0Z2.0;刀具定位至内径粗加工循环点
    G71U1.5R0.5;粗车每次切深1.5mrn,退刀量0.5mm
    G7lP12Q13U-0.4W0.1;
    N12G00G41X28.0;刀尖R补偿方向为左
    G01Z0;
    G02X20.0Z-4.0R4.0;
    G01Z-20.0;X18.0;
    N13G01G40X16.0;
    G28U0W0T0M05;
    N6;工序Ⅵ:外径精加工
    G00G40G97G99S500M04T0404F0.1;
    X64.0Z2.0;
    G96S150;
    G70P10Q11;
    G00G97X100.0S500;
    G28U0W0T0M50;
    N7;工序Ⅶ:内径精加工
    G00G40G97G99S300M04T1010F0.1;
    X16.0Z2.0:G96S120;
    G70P10Q11;
    G00G97Z50.0S300;
    G28U0W0T0M05;
    N8;工序Ⅷ:加工外环槽工
    G00G40G97S250T0505M04F0.05;
    X42.0Z-20.0;
    G01X36.0;
    G0lX42.0F0.2;
    G28U0W0T0M05;
    N9;工序Ⅸ:加工锥螺纹
    G0G40G97G99S500T0606M04;
    X42.026.0;刀具定位至螺纹加工循环点
    G92X39.7Z-18.0R-3.0F1.5;
    X39.1;
    X38.7;
    X38.6;
    X38.55;
    G28U0W0T0M05;
    N10;工序X:铣削径向孔
    M54;
    G28H-30.0;
    G50C0;设定c轴坐标系
    G0G40G97G98S700M04T0909;
    Z-30.0;
    X42.0;
    M98P40010;调用00010子程序4次
    G28U0W0H0T0M05;X轴、Z轴、C轴自动回归原点
    M55;C轴离合器脱开
    M30;程序结束
    O0010;子程序
    G01X30.0F5;
    G01X42.0F20;
    G00H90.0;
    M99;子程序调用结束
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