Splicing and welding process method for straddle type monorail vehicle bogie frame

One or more embodiments of the specification provide a straddle type monorail vehicle bogie frame assembling and welding process method. The method comprises the following steps: assembling and welding a bottom plate pre-assembly; the carbon steel forged part guide wheel seat is machined and then assembled and welded with the bottom plate metal plate bending part; splicing and welding the side beam assembly; the carbon steel sheet metal part and the blanking part are spliced and welded in two steps. Splicing and welding the motor hanging seat; the carbon steel sheet metal part and the blanking part are spliced and welded to form the carbon steel sheet metal part. Assembling and welding the foundation frame; the motor lifting seat is formed by splicing and welding a bottom plate pre-assembly, a motor lifting seat assembly and a carbon steel sheet metal part in four steps, and welding deformation is controlled; the lateral deviation of the side beam assemblies at the two ends relative to the center line of the