Crankshaft Hole Concentricity Repair Method

A repair method and technology for crankshaft holes, applied in the field of parts repair, can solve the problems of high repair cost, hidden quality, time-consuming and labor-intensive problems

Active Publication Date: 2021-01-26
CRRC DALIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, repairing by coating is costly, time-consuming and labor-intensive, and the quality of coating is unstable, and the coating is easy to fall off during use, causing quality problems

Method used

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  • Crankshaft Hole Concentricity Repair Method
  • Crankshaft Hole Concentricity Repair Method
  • Crankshaft Hole Concentricity Repair Method

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of practice in sequences other than...

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Abstract

The invention provides a method for repairing the coaxiality of a crankshaft hole. Among them, the method for repairing the coaxiality of a crankshaft hole provided by the present invention includes: first removing the bolt group between the machine body and the tile cover to separate the body from the tile cover, and then grinding the first surface of the tile cover to form The second surface, so that the second surface of all the tiles is of the same height, and then the tiles after grinding are reinstalled to the body through the bolt group to form an elliptical hole, and finally the elliptical hole is adjusted according to the nominal size of the crankshaft hole. Boring to form a second crank bore, wherein the second crank bore is a reconditioned crank bore. The method for repairing the coaxiality of the crankshaft hole provided by the present invention can reliably repair the crankshaft hole of the machine body whose coaxiality is out of tolerance, and has stable quality and convenient and reliable operation.

Description

technical field [0001] The invention relates to the technical field of component repair, in particular to a method for repairing the coaxiality of a crankshaft hole. Background technique [0002] The 240 diesel engine is the main type of diesel engine equipped with diesel locomotives for railway transportation in my country in the late 1990s. After more than 20 years of use, it is now the peak period for overhaul of this type. The body of the diesel engine adopts a welded structure. Due to the complete release of welding stress and long-term use, when the diesel engine was overhauled and disassembled, it was found that the coaxiality of most of the crankshaft holes (a total of 9 positions) of the engine was out of tolerance, which made the engine unusable and caused great damage. waste. [0003] In the prior art, for the crankshaft hole of the machine body whose coaxiality is out of tolerance, for the size measured according to the coaxiality, the 9 crankshaft holes of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/00B23P15/00
CPCB23P6/00B23P15/00
Inventor 李良喜王立民李航刘扬史向前
Owner CRRC DALIAN CO LTD
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