Lightweight door ring processing device and door ring thereof

The invention discloses a lightweight door ring processing device and a door ring thereof, relates to the technical field of door ring processing equipment, and aims to solve the technical problem that welding positions are slightly staggered due to the fact that adjacent door ring raw materials are not horizontally aligned in the processing process. If the horizontal infrared transmitter and the horizontal infrared receiver on the same stable adjusting mechanism both recognize, it is indicated that the stable adjusting mechanism is damaged or the door ring raw materials are uneven in alignment, and then the vertical distance between the distance sensor and the bottom face of the door ring raw materials is judged through the distance sensor; if the distance is wrong with the actually set distance and is a stable adjusting mechanism corresponding to the failure of the horizontal infrared transmitter, the door ring raw material at the position is wrong, then correction is carried out, correction is carried out