A manufacturing process for the composition of the arc side wall of the railway freight car

Abstract

The invention relates to a wagon arc side wall assembly production process. The wagon arc side wall assembly comprises a first side wall plate, a second side wall plate and a third side wall plate which are cambered and welded successively from the top to the bottom. An upper side beam assembly is welded and fixed on a top end plate wall of the first side wall plate. A side wall stiffening beam assembly is welded and fixed longitudinally at the first side wall plate and second side wall plate side wall welding position. A lower side beam assembly is welded and fixed longitudinally at the second side wall plate and third side wall plate welding position. A lower side beam reinforcing beam assembly is welded and fixed longitudinally below the lower side beam assembly. According to the production process, by the side wall plate longitudinal splicing design mode and different-thickness design, spliced welded joints are hidden, the spliced welded joint length is reduced effectively, the joint groove machining amount and the welding material consumption are reduced, the production efficiency is improved, and costs are saved; the side wall flatness is controlled effectively, and the appearance is attractive; the process is simplified, the production difficulty and the labor intensity are reduced, the tooling equipment investment is simple, and the efficiency is improved effectively.

Description

technical field [0001] The invention relates to a manufacturing process of arc side walls, in particular to a manufacturing process of rail freight car arc side walls. Background technique [0002] With the development of society and the addition and expansion of global railway facilities, the demand for railway transportation of mineral resources has been greatly improved. At present, the railway wagons responsible for the transportation of mineral resources are mainly gondola cars and hopper cars. Most of the hopper cars use arc side wall structures, mainly composed of arc side wall panels, upper side beams, lower side beams and reinforced beams. It is convenient to increase the volume of the car body, and the design of the controlled bottom door structure realizes the automatic unloading of granular or massive bulk goods. It has become one of the main railway wagons for transporting mineral resources. [0003] Due to the different technical parameters of the vehicle, the...

AI Technical Summary

Problems solved by technology

[0012] 1) The arc side wall is an important load-bearing part of the railway hopper car. Its longitudinal force state is generally uniform, but its transverse lower part is far more complicated than the transverse upper part. The lower part bears much more than In the upper part, the conventional arc side wall panels adopt the horizontal splicing method, and the design thickness of the whole side wall panel is the same, so it is impossible to realize the same strength design of different thicknesses on the side wall panel and the lower part, which is not conducive to reducing the weight of the vehicle, resulting in waste of materials ,Increased costs

[0013] 2) The horizontal splicing method is difficult to achieve equal-strength design of different plate thicknesses on the side wall panels and lower parts. In order to ensure the bearing capacity and rigidity, the thickness of the entire side wall panel is generally designed to be greater than 4mm. The greater the load, the design plate thickness will vary. the increase

The design of the manufacturing process generally needs to be rounded first and then spliced. It is necessary to set up a special arc splicing tire position. The side wall assembly tire position also needs to be equipped with a profiling arc. The process and tooling are more complicated, and the investment is also large. Welding Reverse Deformation of Lower Side Beam

If the rounding process is cancelled, the process scheme of arc profiling assembly after the side wall panels are spliced ​​by flat plates is generally not convenient for the preparation of side wall arcs, and it is difficult to meet the requirements of vehicle assembly

[0014] 3) Assuming that each arc side wall is spliced ​​by at least 5 side wall craft parts, the horizontal splicing scheme has at least 4 splicing welds. With the increase of the vehicle design length, there will be more splicing welds, and the welding time will be longer , heavy workload

[0015] When using automatic welding, if one automatic welding device is used, the welding position needs to be adjusted several times in the whole splicing process to complete the welding of all spliced ​​welds, and it is difficult to realize the process plan of one-time adjustment and welding completion; if multiple automatic welding devices are used to realize simultaneous Welding, labor input, equipment investment is huge, and manufacturing cost is high

[0016] When using semi-automatic welding or manual welding, the operator needs to weld on the arc surface, which has great safety hazards, and the efficiency is low, and the welding quality is difficult to be effectively guaranteed

[0017] 4) There are a large number of transverse splicing welds on arc side wall panels, and it is difficult to control the pairing gap and misalignment of multiple arc panels, and all transverse splicing welds are side wall appearance welds, and the welds are formed Good or bad directly affects the appearance of the vehicle

[0018] 5) The total length of the weld seam for horizontal splicing is generally long. To ensure the quality of splicing appearance, grooves need to be prepared, and the amount of groove processing and welding consumables are relatively large. To ensure the quality of splicing, both ends of each weld need to be equipped ) arc plate, leading (receiving) arc plate needs to be specially cut, and processed into the same groove type as the splicing joint, the auxiliary investment required is relatively large

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