Threaded hole repair drill assembly and threaded hole repair method

Abstract

The invention provides a threaded hole repairing drill bit assembly and a threaded hole repairing method. The threaded hole repairing drill bit assembly comprises a first rod-shaped body, a second rod-shaped body and a third rod-shaped body which are sequentially used in a threaded hole repairing process. The first end of the first rod-shaped body, the first end of the second rod-shaped body and the first end of the third rod-shaped body are provided with connecting portions which are connected with a spanner, the second end of the first rod-shaped body, the second end of the second rod-shapedbody and the second end of the third rod-shaped body are provided with spiral cutting knives, and the diameter of the first rod-shaped body, the diameter of the second rod-shaped body and the diameter of the third rod-shaped body are matched with the inner diameter of a threaded hole. The end portion of the cutting knife of the first rod-shaped body and the end portion of the cutting knife of thesecond rod-shaped body are provided with guide parts used for being clamped into the threaded hole respectively, and the diameter of the guide parts is matched with the tooth top circle of the threaded hole. The threaded hole repairing drill bit assembly can be used for safely and rapidly repairing the threaded hole of which threads are damaged or the threaded hole which does not meet the requirement of a measurement standard.

Description

technical field [0001] The invention relates to the technical field of repairing and processing of large mechanical parts, in particular to a threaded hole repairing drill assembly and a threaded hole repairing method. Background technique [0002] Large parts on railway vehicles will fail during long-term operation. The bogie, as the part with the most accessories on the train, plays a decisive role in driving safety. Therefore, periodic maintenance of the vehicle and the bogie is required. The content of the maintenance mainly includes the connecting threaded holes assembled by the suspension parts. Due to the frequent disassembly during the installation and maintenance process, the thread teeth in the bolt holes of large parts are damaged or do not meet the requirements of the measurement standards (pass through, stop only). ), the threaded holes that do not meet the technical requirements need to be repaired. Due to the extremely cumbersome disassembly and installation ...

AI Technical Summary

Problems solved by technology

[0004] No matter the first method or the second method, the threaded hole to be repaired needs to be reamed. However, the first method mentioned above requires positioning operation for the electric drill and magnetic drill. Regular tooling, the design and production cycle of this tooling is long, which seriously affects the repair cycle; in addition, the installation space occupied by electric drills and magnetic drills is relatively large, and under some conditions there is no space, which affects repairing, and in special cases, magnetic drills cannot be used. Because the magnetic drill is magnetic, it will demagnetize or change the magnetism of the magnetic parts, so it is not suitable for the repair of the threaded holes of the nearby magnetic parts (such as the repair of the threaded holes on the axle box cover of the bogie turning wall, because the shaft Bearings in the box are magnetic)

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