DF4D internal combustion locomotive connecting rod tooth part repairing and milling combined device

Abstract

The invention discloses a DF4D internal combustion locomotive connecting rod tooth part repairing and milling combined device. The DF4D internal combustion locomotive connecting rod tooth part repairing and milling combined device comprises a device body, a cutter adjusting block, a positioning pin, positioning blocks, a fine adjusting device, an adjusting nut and a pressing plate. The device bodyis composed of a base, a mounting plate and a reinforcing rib and is fixedly integrated through overall casting. The cutter adjusting block is arranged in a cutter adjusting block mounting groove inthe top of the mounting plate. The positioning pin is arranged in a positioning pin mounting hole in the mounting plate. The positioning blocks are symmetrically fixed in positioning block mounting holes in the two sides of the mounting plate. The fine adjusting device is arranged on one side of a mounting plate mounting connecting rod body. The adjusting nut is arranged on a reinforcing rib at one side of the mounting plate. The device is scientific in design, and unifies the manufacturing and assembly standard and overhaul and positioning standard of a connecting rod. In the aspect of toothshape alignment, the position problem that the difference of one half of a tooth shape exists between a connecting rod body and a connecting rod cover is effectively solved, so that the precision of an overhauled connecting rod is consistent with the precision of a newly manufactured connecting rod, the rejection rate of connecting rods is reduced, and more economic benefits are brought to enterprises.

Description

technical field [0001] The invention belongs to the technical field of manufacture and maintenance of diesel locomotive vehicle parts, and in particular relates to a planer-milling combination device for repairing cracks in connecting rod teeth of DF4D diesel locomotives. Background technique [0002] As one of the key moving parts of the diesel engine, the connecting rod converts the linear reciprocating motion of the piston into the rotary motion of the crankshaft, and transmits the force between the piston and the crankshaft. In recent years, with the implementation of the high-speed and heavy-duty railway strategy and the increase in the service life of locomotives, the operating conditions and conditions of diesel locomotives have become worse and worse, and the incidence of cracks in the connecting rod teeth of DF4D diesel locomotives has continued to increase. Among them, the failure mode and tooth cracks of the scrapped connecting rods have reached 60% according to r...

AI Technical Summary

Problems solved by technology

[0003] The most obvious difference between the overhaul connecting rod process and the newly manufactured connecting rod process is: in the newly manufactured connecting rod process, the process flow is: first mill the end faces of the connecting rod body and the connecting rod cover, and then plan and mill the teeth. Then align with the tooth shape, first bore and then grind the big and small holes of the connecting rod, so that the big and small holes used for the assembly reference of the connecting rod are produced later, and the process of repairing the connecting rod is: grinding of the broken teeth, welding repair, and planing off excess welding material, re-milling, grinding, and finally fine boring and fine grinding processes. If the tooling used in the original manufacturing connecting rod is used, the tooth profile is still used for alignment, fine boring, and fine grinding of large holes. At this time, the connecting rod assembly benchmark The large and small holes have already been produced. Because the connecting rod body and the connecting rod cover are half a tooth profile apart, and some tooth profiles have defects, the alignment accuracy is low. Often less than 85%, there is a great risk of tile burning; in order to ensure that the visible area after grinding holes is greater than 85%, and to avoid the risk of diesel engine tile burning, this DF4D type diesel locomotive connecting rod precision repair gear planing and milling combination device was designed and manufactured

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