Shaft sleeve mounting and welding production line of pump truck base

The invention provides a shaft sleeve mounting and welding production line for a pump truck base, and relates to the technical field of pump truck chassis production. The pump truck base comprises a pump truck chassis box body and a hinge assembly. The hinge assembly comprises a lower panel, a lower shaft sleeve, an upper panel, an upper cover plate and an upper shaft sleeve. The pump truck chassis box body comprises a bottom plate, an upper annular side wall and a lower annular side wall. The lower annular sidewall is joined to the base plate. The bottom plate, the lower embedded plate, the upper embedded plate and the upper cover plate are provided with a first round hole, a second round hole, a third round hole and a fourth round hole respectively. The production line comprises a first accompanying fixing assembly, a coaxiality assembly and a shaft fixing assembly used for fixing the positioning shaft. The coaxiality assembly comprises a first positioning circular ring, a second positioning circular ring,