Welding device and repair process for fracture of large crankshaft of high-pressure pump body

Abstract

The invention discloses a welding device for the fracture of a large crankshaft of a high-pressure pump body. The welding device comprises a structural part tool bottom plate. A left support is fixedly arranged on one side of the structural part tool bottom plate, a right support is slidably arranged on the other side of the structural part tool bottom plate, and a right support adjusting device is arranged between the right support and the structural part tool bottom plate. A left clamping fixing frame and a right clamping fixing frame are rotatably arranged on the left support and the right support respectively. A left fixing frame adjusting device is movably arranged between the left clamping fixing frame and the left support, and a right fixing frame adjusting device is movably arranged between the right clamping fixing frame and the right support. The invention further discloses a repair process for the fracture of the large crankshaft of the high-pressure pump body. By means of the welding device, welding repair of the fracture of the large crankshaft of the high-pressure pump body can be rapidly implemented, the purchase cost is reduced, the long-time procedure shutdown loss is reduced, and a guarantee is provided for reasonable production organization.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a welding device and a repairing process for a broken large crankshaft of a high-pressure pump body. Background technique [0002] At present, the high-pressure pump room of the key department of Baowu Masteel Railroad Material Technology Co., Ltd. has undergone several rounds of transformation, and there are now 12 conjoined high-pressure water pumps. However, due to the inaccurate maintenance and installation of the core drive crankshaft spare parts of several high-pressure water pumps and the inaccurate size of the connecting motor, and the quality of the lubricating medium of the crankshaft body is not up to standard, the key joints of the large crankshaft that do work are broken during the process of non-stop reciprocating motion. If the crankshaft spare parts are replaced as a whole, it will not only require a large amount of spare parts costs, but also because there are no ...

AI Technical Summary

Problems solved by technology

In addition, the main difficulties in the welding repair of the large crankshaft fracture of the high-pressure pump body are: 1. The irregular shape of the crankshaft body makes it difficult to control the combination of the fracture and all-position welding; 2. The welding of alloy steel ensures preheating--controlling the interlayer temperature-- Post-weld heat treatment eliminates welding stress and controls the deformation of the overall structural parts within the effective range; 3. After the welding of the fracture is completed, the surface is purely manual grinding, but the precision of the crankshaft must be reached; 4. The large-scale after the final overall repair After the crankshaft is installed, there will be no structural deformation, and it will not affect the internal structure, resulting in various substandard performances, especially after welding repair, the surface of the large crankshaft must not have any welding defects to avoid subsequent impact on the life cycle quality of high-pressure water pumps

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