This invention relates to the field of
laser cutting machine technology, specifically a
laser tube
cutting machine, comprising a base, a movable chuck, a fixed chuck, and a
laser cutting head. It also includes a main rack, a connecting mechanism, a
dumbbell seat, a positioning seat, a guide wheel
assembly, a
diagonal rod, a drive mechanism, and a
grinding disc. The connecting mechanism is connected to the main rack, the
dumbbell seat and the positioning seat are both connected to the connecting mechanism, the
diagonal rod is hinged to the positioning seat, the drive mechanism is connected to the
diagonal rod, and the
grinding disc is connected to the drive mechanism. When the movable chuck moves the tube towards the fixed chuck, the main rack controls the operation of the connecting mechanism and drives the guide wheel
assembly away from the
dumbbell seat via the positioning seat. After the guide wheel
assembly is in contact with the inner wall of the tube, the diagonal rod, under pressure, drives the
grinding disc outward through the drive mechanism to
grind the
cut. During tube cutting, the positioning seat and the guide wheel assembly support the inner wall of the tube and simultaneously cool and
grind the
cut, improving the tube cutting effect.