When brazing on the top of the flange, the welding angle is difficult to ensure, and there is no reinforcing plate under the tube plate. Therefore, in the operation of the locomotive, the brazing seam is often cracked and leaked due to vibration and the like. It is recommended that when the tube hole is flushed on the tube sheet, it is not required to be punched into the flat tube hole of the tube sheet to form a burring hole. Reinforced joint box strength The radiator joint box is installed on the locomotive cooling device header, and the joint box functions to support the weight of the radiator. At present, the radiator coupling boxes produced by various manufacturers are roughly divided into three types of cast steel joint boxes which are integrally cast, which have high strength, but large machining capacity, and low yield due to poor quality of casting blanks, etc. . Secondly, the elbow is made of cast steel and then welded together with the box of the profiled part (the joint box with the elbow bottom and the thick box is welded together, because the thickness of the box is not enough and the weld is welded The bearing surface is narrow, so the strength of the joint box of this structure is not enough. The third type is the stamping and welding joint box used by our factory. The flange base elbow and the lug are welded together to increase the strength of the joint box. The base is formed by pressing a single steel plate. In addition, the flange extends to the top of the base and is welded with the base and the elbow to improve the strength of the joint box. Strengthen the side guard plate to protect the radiator side guard. Clamp the role of the cooling core.

So far, all manufacturers have adopted steel plate pressing parts. In order to strengthen the strength and rigidity of the side protection plates, the side protection plates are pressed out of the reinforcing ribs on both sides, and the two ends are punched and the two ends are brazed on both sides of the tube plate (Fig. The two sides of the side guard plate are notched, which damages the press-type reinforcing ribs and reduces the rigidity of the side guard plates. Although the side guard plates used in our factory also press the reinforcing ribs on both sides, the two ends do not punch the notch and directly braze. On the bottom surface of the reinforcing plate, the heat sink forms a solid frame structure, and at the same time, the two tube sheets are positioned at a distance. In addition, the side guard plate flanging height can be reduced to reduce the windward windward surface wind resistance, and the side guard plate is The ribs are thickened to the extent necessary to strengthen the lacing strength. The inner side of the side slab must be rust-removed and tinned so that the corrugated strips of the near side slab are brazed together by brazing, thereby strengthening the cooling core. Sub-rigidity. (End)

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