Pipe bending device for ventilation pipe machining

The utility model provides a pipe bending device for ventilation pipe machining, and belongs to the technical field of ventilation pipes. The pipe bending device for vent pipe machining comprises a base, a pipe bending mechanism and an adjusting mechanism, a support is fixedly installed on the upper portion of the base, the pipe bending mechanism comprises a sliding base, an extension cylinder, an elbow and a first lead screw, the sliding base is slidably installed on the upper portion of the base, a second threaded block is fixedly installed on the lower portion of the sliding base, and a second lead screw is rotatably installed in an inner cavity of the base; the second lead screw is in threaded connection with the second threaded block, and a motor is fixedly installed on the side wall of the base. According to the pipe bending device, the pipe bending mechanism is arranged, a second lead screw can be driven to rotate through a motor, so that a second threaded block in threaded connection drives a sliding