A manufacturing process of the side beam assembly at the end of the head car of a standardized EMU

Abstract

The invention discloses a process for manufacturing a standardization train-set head-car end portion side beam component, which comprises the steps that: 1 preparation before welding; 2 cleaning and polishing; 3 assembling and spot welding: a seat plate, rib plates and side beams are assembled, the two side beams are arranged back to back, and are fixed through a clamp, and then a pull plate is welded on the two side beams; 4 welding of the seat plate: the seat plate and the side beams are welded; 5 welding of crevasse sides of the rib plates: a train-set head-car end portion side beam component is fixed on a vertical tool, the crevasse sides of the rib plates are upwardly arranged, and are welded; and 6 welding of angle welding sides of the rib plates: the train-set head-car end portion side beam component is turned over toward non-crevasse sides of the rib plates, and is welded on the non-crevasse sides of the rib plates. The process for manufacturing the standardization train-set head-car end portion side beam component works by adopting a mode that the side beams are welded in the vertical direction, changes welding direction of welding lines, and guarantees welding quality of the welding lines.

Description

technical field [0001] The invention relates to the technical field of motor trains, in particular to a manufacturing process of a side beam assembly at the end of a standardized motor train unit. Background technique [0002] In China, trains with speeds of up to 250km / h or more are called "high speed trains". With the development of the times, bullet trains have gradually replaced traditional trains. The shape of the head car of the EMU is streamlined. This design can reduce the air resistance and noise during the operation of the EMU. The side beam assembly at the end of the head car of the EMU is used to change the cross-section of the end of the underframe of the head car to a streamlined shape. , A component that makes the car body look streamlined. The side beam assembly at the end of the head car of the EMU also plays the role of connecting the end structure of the underframe and the side beam of the underframe to bear the body of the head car. In addition, during...

AI Technical Summary

Problems solved by technology

Therefore, the welding quality of the side beam components at the end of the head car of the EMU is extremely important. The welds require CPC2 welds, the inspection level is CT3, and the standard requires 100% non-destructive testing, but the current process cannot meet the requirements of 100% non-destructive testing. In addition, the weld penetration of the side beam is large, and multi-layer and multi-pass welding are prone to defects such as insufficient penetration and unfused layers; the requirements for flatness and straightness are high, and adjustment is difficult, which cannot satisfy the market well. Requirements; the welding angle of the weld seam is difficult to achieve, and the welding quality cannot be guaranteed

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