Large spur gear online welding repairing process

Abstract

The invention discloses a large spur gear online welding repairing process. The large spur gear online welding repairing process is characterized in that the process is performed according to preparation before welding, welding treatment, and treatment after welding. The welding treatment comprises weldment position adjusting and pre-welding washing, welding broken tooth part flattening and weldment heating, transition base coat welding, and surfacing layer welding; and after welding is finished, comparing is performed through a pre-manufactured tooth template, residual weld joints are cut andflattened through a plasma gouge, then coping is roughly performed through a corner grinding machine, the size of the tooth template is met, and stress is eliminated finally. The large spur gear online welding repairing process has the advantages that online welding repairing of the to-be-welded gear part is finished in a narrow space, a spur gear after surfacing meets the operation size throughmanual grinding, the surface of the spur gear has no welding defect, the subsequent operation period quality is ensured, the maintenance time is shortened, the maintenance cost is reduced, the halt loss is reduced, and reasonable assembly and production are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of gear maintenance, and in particular relates to an online welding repair process for broken teeth of large spur gears on a wheel and hoop rolling mill. Background technique [0002] The tire rolling mill is responsible for the rolling of the flange of the tire. The main drive system is realized by the main motor through the main reducer, the main drive shaft, the bevel gear, and the large and small spur gears to drive the vertical shaft of the main roll and the horizontal roll to rotate respectively. The small spur gear Installed on the main transmission shaft, the large spur gear meshing with it is installed on the horizontal roll shaft, and a pair of large and small spur gears meshing with each other mainly play the role of matching speed and transmitting torque when the tire rolling mill is working. With the extension of the working time of the tire rolling mill, the meshed spur gears have been operatin...

AI Technical Summary

Problems solved by technology

With the extension of the working time of the tire rolling mill, the meshed spur gears have been operating under load for a long time, and the large spur gears (m=28, Z=73) have partially broken teeth, which affects the running accuracy of the shaft system and makes the tires Larger vibration and noise are generated when the rolling mill is working

Due to the large size of the spur gears of the wheel rolling mill, there are certain difficulties in disassembly, hoisting and transportation. It takes a long time to transport them to the factory for repair, and the procurement cycle for spare parts required for on-site replacement is long. Perform welding repairs

In the prior art, the application of various gear wear and fracture welding repairs is relatively common, and many literatures have described it, but the application of on-site welding repairs for large spur gear broken teeth is still relatively rare

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