Water-proof assembly process for sealing structure of rail vehicles

Abstract

The invention relates to a water seepage preventing assembly process of a rail vehicle sealing structure. The process comprises the following steps: a side wall plate and an outer edge groove of a chassis edge beam are in butt joint on a vehicle body assembly tire; the segment welding treatment is performed for an internal fillet welding line; the full welding treatment is performed for an external welding line; the seepage test is performed for the external welding line, that is, soapy water is coated in the external welding line, high-pressure wind is blown from the internal of a vehicle along the welding lines of the chassis edge beam and the side wall plate from inside to outside to check if surface air holes exist in external butt joint welding lines of the chassis edge beam and the side wall plate; if the air holes exist, the polishing repair welding is performed, and the seepage test is performed again; if the air holes still exist, the polishing repair welding is continuously performed until the seepage test is passed; the full welding treatment is performed for the internal fillet welding line; and a repair leveling procedure is performed. The process prevents the water seepage phenomenon of the chassis edge beam and the side wall plate sealing structure to provide powerful guarantee for quality of a later paint procedure, is easy to realize, and is excellent in quality control.

Description

technical field [0001] The invention relates to a rail vehicle sealing structure anti-seepage assembly process and the technical field of metal non-destructive flaw detection. Background technique [0002] The sealing structure composed of rail vehicle underframe side beams and side wall panels (such as figure 1 As shown, after the side wall panel 2 is docked with the outer groove 3 of the side beam of the underframe 1, the inside and outside are fully welded, A is an internal fillet weld, and B is an external weld) belongs to one of the main load-bearing structures of the car body. The assembly method of the structure directly affects its sealing effect and the assembly quality of the subsequent process. [0003] The original assembly process is to directly enter the repair and leveling process after the two normal welds of the structure are welded on the car body assembly tire. The original assembly process has the following disadvantages: [0004] 1. The two long (abou...

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Problems solved by technology

[0004] 1. The two long (about 20m) welds inside and outside are completely welded by hand, especially the outer weld is in the horizontal welding position, and there is a risk of defects such as pores due to fatigue caused by manual long-term operation;

[0005] 2. Since the deflection of the side wall panel is allowed to exist within 10mm, the external connection treatment of the side wall panel and the outer groove of the side beam of the chassis is 2mm, and the actual butt joint gap fluctuates between 2-12mm, resulting in an increase in the instability of welding quality ;

[0006] 3. There are risks of defects such as air holes in the quality of the external welds. Without effective preventive measures, it directly enters the repair and leveling process (this process requires a lot of watering), which will easily cause moisture to penetrate into the structure, causing corrosion and subsequent corrosion. Quality accidents such as peeling and peeling in the paint process

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