Special-shaped weld joint forming method, bogie welding method and vehicle

Abstract

The invention provides a special-shaped weld joint forming method, a bogie welding method and a vehicle, and belongs to the technical field of welding. The special-shaped weld joint forming method comprises the step that welding parameters are determined according to welding conditions, and further comprises the steps that check blocks are arranged on the sides of a weld joint according to the target shape of the weld joint, the check blocks are used for defining a groove together with to-be-welded parts, the groove is used for containing molten pool metal and limiting natural flowing of the molten pool metal, welding is conducted, and after the molten pool metal is solidified in the groove, a weld joint in a target shape is formed. According to the special-shaped weld joint forming methodprovided by the invention, the welding efficiency can be remarkably improved, the production cost is reduced, and meanwhile the welding quality is improved.

Description

technical field [0001] The invention belongs to the field of welding technology, and more specifically relates to a method for forming a special-shaped weld seam, a bogie welding method and a vehicle. Background technique [0002] The bogie is one of the important parts of the rail vehicle, which is used to support the car body and make it run on the track. Welding is involved in the manufacturing process of the bogie, and there is no lack of welding of special-shaped welds. Irregular welds mean that the connection surface of the parts to be welded is not a regular plane, or the required weld shape is irregular, and it is a three-dimensional weld in three-dimensional space, which makes it impossible to weld by conventional welding methods, for example, in bogie frames Existing multiple dovetail welds. [0003] In the prior art, the special-shaped welds are generally welded by multi-layer and multi-pass surfacing welding. The filling amount of each pass should not be too la...

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Problems solved by technology

[0003] In the prior art, multi-layer and multi-pass surfacing welding is generally used to weld special-shaped welds, and the filling amount of each pass should not be too large to prevent the molten pool metal from It flows freely under the action of gravity, and each layer of welding needs to go through intermediate links such as waiting for the weld to cool down, grinding the molten metal to prevent welding defects such as unfused, inclusions, etc. The welding time is long, the efficiency is low, and it is difficult to control the welding quality; At the same time, in order to ensure the required weld size, the weld size is generally piled up to exceed the drawing requirements during surfacing, and then the excess part is ground off. The hardness of the deposited metal is high, and grinding is time-consuming and laborious, and wastes welding materials.

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