The utility model discloses a rim plate body group welds uses frock, the frock includes that supporting seat, left support post, right support post, step motor, antifriction bearing, initiative chuck, minor axis, long jack catch, passive chuck, major axis, bearing housing, return stroke axle sleeve, return stroke are drawn set for the assembly welding, the promotion is drawn set, impeller -hub, thrust bearing, cylinder, work air chamber, return stroke air chamber, cylinder support, wherein the supporting seat includes two left and right support posts, and the minor axis passes through antifriction bearing and left support post interference fit connects, and the major axis is connected with bearing housing clearance fit, and the bearing housing is connected with right support post interference fit, and long jack catch inlays on initiative chuck and passive chuck. The technical scheme of the utility model, overcome the deformations problems that the wheel disk body freely quenches, solved and pressed the crack problem who quenches and bring, improved the yield of product.