数控机床编程：第5讲-系统编程基础-g92螺纹循环切削加工指令

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1、第5讲 数控编程基础知识 G92指令,数控机床加工技术,1、程序段格式：,G92 X_Z_I_F_； X、Z螺纹终点坐标值； I锥螺纹起点和终点的半径差，一般按延伸后的值进行考虑；I的正负判别如下：锥面起点坐标大于终点坐标时取正，反之取负；圆柱螺纹直径相同，所以I为0，可省略。 F螺纹的导程；,第5讲 数控编程常用指令G92,一、螺纹切削循环指令G92,例题42-A：,第5讲 数控编程常用指令G92,一、螺纹切削循环指令G92,普通螺纹M241.5,13mm， 21mm。,第5讲 数控编程常用指令G92,一、螺纹切削循环指令G92,计算螺纹底径 d=d-20.62P=(24-20.621.5)

2、mm =22.14mm 确定背吃刀量 1mm 0.5mm 0.3mm 0.06mm 加工程序,第5讲 数控编程常用指令G92,一、螺纹切削循环指令G92,加工程序,O1004 N05 M03 S300; N10 T0202; N15 G00 X30.0 Z3.0; N20 G92 X23.0 Z-23.0 F1.5; N25 X22.5; N45 X22.2; N50 X22.14; N55 G00 X100.0; N60 Z100.0; N65 ,例题42-B：,第5讲 数控编程常用指令G92,一、螺纹切削循环指令G92,圆锥螺纹大端大径55, 圆锥螺纹小端大径35, P2mm； 13mm；

3、 22mm,第5讲 数控编程常用指令G92,一、螺纹切削循环指令G92,计算螺纹小端底径 d1=d1-20.62P=(35-20.622)mm =32.52mm 计算螺纹大端底径 d2=d2-20.62P=(55-20.622)mm =52.52mm 确定背吃刀量 1mm 0.7mm 0.5mm 0.2mm 0.08mm 加工程序,第5讲 数控编程常用指令G92,一、螺纹切削循环指令G92,加工程序,O1005 N05 M03 S300; N10 T0202; N15 G00 X70.0 Z3.0; N20 G92 X54.0 Z-42.0 I-10.0 F2.0; N25 X53.3; N3

4、0 X52.8; N35 X52.6; N40 X52.52; N45 G00 X100.0 Z100.0; N50 ,第5讲 数控编程常用指令G92,课后习题:G32指令练习,第5讲 数控编程常用指令G92,课后习题:G32指令与G92指令对比,O1004 N05 M03 S300; N10 T0202; N15 G00 X30.0 Z3.0; N20 X23.0; N25 G32 Z-23.0 F1.5; N30 G00 X30.0; N35 Z3.0; N40 X22.5; N45 G32 Z-23.0 F1.5; N50 G00 X30.0; N55 Z3.0;,N60 X22.2; N65 G32 Z-23.0 F1.5; N70 G00 X30.0; N75 Z3.0; N80 X22.14; N85 G32 Z-23.0 F1.5; N90 G00 X100.0; N95 Z100.0; N100 M05; N105 M30; %,O1004 N05 M03 S300; N10 T0202; N15 G00 X30.0 Z3.0; N20 G92 X23.0 Z-23.0 F1.5; N25 X22.5; N45 X22.2; N50 X22.14; N55 G00 X100.0; N60 Z100.0; N65 ,