Cylindrical part inner wall weld joint polishing device

The utility model discloses a tubular part inner wall weld joint polishing device, which relates to the technical field of welding and polishing, and comprises a main frame, a feeding mechanism and a polishing mechanism are respectively arranged in front of and behind the main frame, the feeding mechanism comprises a feeding support, a V-shaped plate and a feeding motor, the V-shaped plate is arranged at the upper end of the feeding support, a sliding block is fixed at the lower end of the feeding support, and the feeding motor is connected with the V-shaped plate. And the sliding block is matched with a sliding rail arranged on the main frame, a feeding gear is installed at the head of the output end of the feeding motor, a feeding rack is meshed with the upper end of the feeding gear, and the grinding mechanism comprises a grinding support, a grinding motor, a lifting air cylinder and an abrasive belt. A transverse reciprocating type grinding mode is adopted, compared with a rotary type grinding mode, the t