Method for repairing fractured track rolling bearing of numerical control gate type pipe making machine

Abstract

The invention provides a method for repairing a fractured track rolling bearing of a numerical control gate type pipe making machine. The method for repairing the fractured track rolling bearing of the numerical control gate type pipe making machine comprises the following steps firstly, the fractured track rolling bearing is detached from a pipe making unit and is thoroughly polished with a grinding wheel, and torn small cracks in a fracture surface are eliminated; secondly, oxygen- acetylene is used for heating a fracture surface body to reach 250-350 DEG C; thirdly, welding is performed, a welding rod is used to form a convex surface on a bearing body in a build-up welding mode, the protruding height is 15 mm, then, the convex surface is polished to become a conical slope through the grinding wheel, and a small connector of the bearing is connected through a method of combining the welding rod with metal; fourthly, a heater is immediately used for heating the welded position to reach 650 DEG C after welding, the temperature is kept for 3-5 hours, and then the welded position is cooled to reach the room temperature; fifthly, the welded position is polished, and the appearance of a welded joint is polished so that the welded joint and a base material can be in smooth transition. The method for repairing the fractured track rolling bearing of the numerical control gate type pipe making machine has the technical advantages that the repaired track rolling bearing can be normally used again, can basically reach or approach to the original level, and is good in effect and normal in operation, and therefore time and cost are greatly saved.

Description

technical field [0001] The invention relates to a method for repairing broken roller bearings of a numerically controlled gantry-type pipe making machine, and belongs to the field of mechanical technology. Background technique [0002] The pipe making machine is also called the welded pipe machine, the pipe making unit, and the welded pipe unit. It is produced by decoiling, forming, welding, grinding, sizing, straightening, cutting to length, cutting and other processes. Due to the forming of stainless steel welded pipes and the maturity of welding technology, seamless pipes have been replaced in many fields. Such as anti-theft doors and windows, stair handrails, drinking water pipes, food hygiene pipes, automobile exhaust pipes, muffler tail pipes, heat exchanger pipes, petrochemical pipes, ship pipes, etc. [0003] During the production process of the pipe making unit, it has been in a state of continuous high-speed operation. When the steel strip is formed, the roller ...

AI Technical Summary

Problems solved by technology

[0003] During the production process of the pipe making unit, it has been in a state of continuous high-speed operation. When the steel strip is formed, the roller bearings are subject to great extrusion force and friction. The working conditions are harsh, and the roller bearings are easy to break, which affects the processing of the coiled pipe.