Bottom plate welding frock

The utility model provides a bottom plate welding frock belongs to car rivet welding technical field. This bottom plate welding frock includes: portal frame, the tool platform who is used for compressing tightly end sheet extrusion device and is used for placing the bottom plate. The portal frame is striden and is located tool platform, the portal frame with tool platform sliding connection, the extrusion device one end with portal frame sliding connection, the other end of extrusion device is neighbouring the bottom plate, the slip direction of portal frame with the slip direction of extrusion device is perpendicular. The portal frame is in the last longitudinal movement of tool platform, the extrusion device passes through the portal frame and is in the last lateral shifting of tool platform, extrusion device and portal frame cooperation among the bottom plate welding frock can compress tightly effective control bottom plate welding deformation to the optional position of bottom plate to keep the plane degree of bottom plate in welding process, in order to ensure the welded quality.