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Crankshaft hole coaxiality repairing method

A repair method and crankshaft hole technology, applied in the field of parts repair, can solve the problems of time-consuming and laborious, high repair cost, hidden quality problems, etc.

Active Publication Date: 2018-12-18
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 coaxiality repairing method
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  • Crankshaft hole coaxiality repairing 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 crankshaft hole coaxiality repairing method. The method comprises the following steps: dismounting bolt sets between a machine body and tile covers in order to separate the machine body and the tile covers; grinding the first surfaces of the tile covers to form second surfaces, wherein the second surfaces of all tile covers are consistent in height; mounting the grinded tile covers to the machine body through the bolt sets again in order to form elliptic holes; and boring the elliptic holes based on the nominal size of a crankshaft hole in order to form second crankshaft holes, wherein the second crankshaft holes are repaired crankshaft holes. With the adoption of the method, the crankshaft holes, with ultra-low coaxiality, of the machine body can be reliably repaired, and moreover, the quality is stable, and the operation is convenient and reliable.

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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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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