Plastic profile line-following punching machine

The invention relates to a plastic profile line-following punching machine. The plastic line-following punching machine comprises a punching die, a base, a line guide rail which is arranged at the upper end of the base and a sliding block which is fixed at the bottom of the die and is matched with the line guide rail, a die driving device, a travel switch, a speed sensor and a programmable logic controller (PLC) system, wherein the die driving device comprises a servo motor, a screw and a coupler, the travel switch is fixed on the base and controls a moving starting point position and a final position of the die, the speed sensor measures a moving distance of a profile online, and the PLC system controls the servo motor to rotate and reverse, controls the rotating speed of the servo motor and drives an air cylinder to act according to the profile moving speed. The plastic profile line-following punching machine can automatically adjust the punching frequency, moving speed and the like of the punching die, and the plastic profile line-following punching machine has the advantages that the precision of the interval between punching holes or grooves is high, punching efficiency is high, punching stability is good, the waste produced is little and the like.