Synchronous welding mold frame for vehicle frame

The utility model discloses a frame synchronous welding mould base which comprises a bottom frame, a welding box mechanism, a welding angle mechanism, a welding pipe mechanism and a welding cylinder mechanism, the welding box mechanism, the welding angle mechanism, the welding pipe mechanism and the welding cylinder mechanism are sequentially arranged above the bottom frame from right to left, the welding box mechanism comprises a support and a box frame connected to the upper portion of the support, and a first pressing rod is movably connected to the front portion of the box frame. The side of the box frame is movably connected with a second moving block, the fillet welding mechanism comprises a backer and a third pressing rod movably connected with the backer, the pipe welding mechanism comprises a vertical plate and a clamping block movably connected to the upper portion of the vertical plate, a first concave cavity is formed in the upper surface of the vertical plate, a clamping groove is formed in the c