The utility model provides a
trepanning mechanism for shipyard plate
processing, which belongs to the technical field of
trepanning mechanisms and comprises a worktable, an inverted L-shaped support is fixedly arranged in the center of the right side of the worktable, a hydraulic rod is mounted on the outer side of the upper surface of the inverted L-shaped support, a
trepanning motor is mounted at the output end of the hydraulic rod, and a
drill bit is mounted at the output end of the trepanning motor. In the drilling process, a shipbuilding is placed on a
workbench, a
drill bit is aligned with the drilling position, a drilling motor is started to drive the
drill bit to rotate, a hydraulic rod extends to drive the drilling motor to move downwards, a lifting
lantern ring firstly makes contact with a plate and moves upwards, and a guide rod moves upwards along a guide sleeve; the lifting
lantern ring is matched with the magnetic suction cylinder to form a relatively
closed space at the drilling position until the
drill bit makes contact with the drilling position and drills the plate,
metal chippings generated during drilling can be blocked by the lifting
lantern ring and the magnetic suction cylinder and prevented from splashing, the
metal chippings can be adsorbed by the inner side surface of the magnetic suction cylinder, and the effect of containing the
metal chippings is achieved.