Machining auxiliary device for bent pipe

The invention discloses a machining auxiliary device for a bent pipe. The machining auxiliary device consists of an upper die and a lower die; the lower die part comprises a positioning sleeve, a pressing plate, a positioning pin, a limiting plate, a lower die holder, a fixed wheel and a pin shaft b; the fixed wheel is fixed to the lower die holder through the pin shaft b; the positioning sleeve, the limiting plate and the pressing plate are respectively fixed to the lower die holder through screws; the positioning pin is mounted in a hole between the pressing plate and the limiting plate; the upper die comprises a rotating wheel, a wheel fork, an upper die plate, a limiting column, a guide column and a pin shaft a; the wheel fork, the limiting column and the guide column are respectively fixed to the upper die plate through screws; and the rotating wheel is fixed to the wheel fork through the pin shaft a. Products machined through the device are consistent in bending size and angle, the surfaces of the produ