Roll forming machine of adjusting vertical spacing of up-down mainshaft

This utility model relates to an upper and down main spindles longitudinal distance adjustment rolling machine, comprising bed, upon which are upper main spindle installed inside the upper spindle sheathing that is first rotating spindle, and down main spindle installed inside the down spindle sheathing that mounted with second rotating spindle. The upper main spindle sheathing connects with one end of up-down connecting bar, the other side of which connects with upper main spindle up-down decelerator, the down main spindle sheathing connected with the piston of down main spindle lifting cylinder which connected with bed through cylinder seat. The utility model can adjust the longitudinal distance of upper and down main spindles according to the requirement, so that the size of processing work piece can be enlarged and reconditioning quality of the can be increased an therefore the service life of is prolonged.