Double-wheel servo automatic weld joint tracking mechanism

The invention discloses a double-wheel servo automatic weld joint tracking mechanism which is designed for efficiently and intelligently welding a pipeline. According to the tracking mechanism, two tracking wheels with protection covers are respectively provided with a conical outer end face, and each conical outer end face is connected with a benchmark wheel with the diameter smaller than the diameter of the corresponding tracking wheel; the two tracking wheels are fixed to the two ends of a servo wheel frame in opposite directions in a staggered mode respectively through an axle; a welding torch is fixed to the middle of the servo wheel frame, the servo wheel frame is connected with a supporting plate and a spring adjusting nut through a stud sleeved with a spring, and the supporting plate is connected and fixed to a welding unit of a welding machine body. The tracking mechanism is combined with existing automatic welding, and is suitable for tracking weld joints of V-shaped grooves, U-shaped grooves and X-