数控车床G76螺纹加工P,Q,R咋算,什么含义

G76螺纹中的PQRF表示什么意思,怎么算
2025-03-14 23:42:50
推荐回答(1个)
回答1:

举个例子G76P021060 Q50 R0.2G76X54.5 Z-50.0 P1374 Q200 F2.116 R-0.76P021060: 02表示螺纹精车R0.2次数是2次如果你给的是04就是4次,10表示退刀角度要不然刀片怎么出来的,如果有退刀槽的话可以不要角度直接00. 60表示刀片角度, Q50:是每次进给量,就是你每次单边车掉多少,以μ为单位。R0.2:是留给P02的精车次数的余量,以丝为单位。X54.5:刀片最后的X方向值,外螺纹时为螺纹底径 内螺纹时为螺纹大径,如果是锥螺纹你就需要分清内外螺纹是不样的。该是螺纹大段的值还是小段的值。明白意思就好理解了,Z-50.0:Z轴方向刀片的最后位置,一般比螺纹长这样就能避免毛刺。P1374:螺纹的单边牙高 ,以μ为单位Q200:第一刀单边车掉多少,以μ为单位F2.116:螺距就是书面上的导程。就是螺纹和螺纹的距离、R-0.76 :锥螺纹的螺纹比值。(确切的说是刀片走的锥度比,算法是起刀点,到终点的距离除以螺纹锥度比,这和螺纹的锥度有关系,我们常用的NPT螺纹是走刀长度除以32,因为NPT螺纹的锥度比是1/16这是固定的值。这一定要算上刀片定位的距离,不是Z-50.0就是50长,要加上G00定位的距离,例如G00X60.0Z5.0,那就是55除以螺纹锥度比了)负数时为外螺纹,正时为内螺纹,如果是直螺纹时可以省掉R一项不编上去。

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