The invention discloses a
welding method of a railway passenger vehicle weather-proof steel sleeper beam complex cross structure. The
welding method of the railway passenger vehicle weather-proof steel sleeper beam complex cross structure includes the step of
welding the weather-proof steel sleeper beam complex cross structure by adopting a dual-step lift, fall and return method which includes: step 1, performing lift welding on the position of a right weld
toe of a weld joint I, marking the lift welding length as L, falling to the position half of the length L in fall welding, and then completing the first step by performing return welding to an intersection of the first-step lift welding right weld
toe and the position of an upper weld
toe of a weld joint II; and step 2, performing liftwelding on the position of a left weld toe of the weld joint I, then performing return welding to the position of a lower weld toe of the weld joint II after falling by one half in the second-step fall welding, completing the second-step lift, fall and return welding, and finally performing continuous weld so as to complete the whole operation. The welding method of the railway passenger vehicle weather-proof steel sleeper beam complex cross structure improves fusion performance of an intersection joint, not only can realize the purpose of improving post-welding one-time flaw detection passingrate to 70%, but also obtains the weld joints easy to polish after the welding, enables flaw
detection rate to reach 100% after
polishing, avoids a reworking procedure, reduces production cost, and improves production efficiency, and above all, the quality of the joint is effectively guaranteed.