Lap joint part external grinding method for turbine case sealing ring

Abstract

The invention relates to the technical field of machining, in particular to a lap joint part external grinding method for a turbine case sealing ring. The lap joint part external grinding method for the turbine case sealing ring comprises the steps that the turbine case sealing ring is embedded into an installation sleeve; a lap joint part of the turbine case sealing ring is positioned to a radial milling zone, and the remaining parts of the turbine case sealing ring are positioned to the inner side of the radial milling zone; the turbine case sealing ring is pressed and positioned in the axial direction to retreat from the installation sleeve; and the lap joint part is milled. By means of the application of the lap joint part external grinding method, the rejection rate, caused by external milling, of the turbine case sealing ring is greatly reduced; and meanwhile, the machining convenience and efficiency of the lap joint part can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of machining, in particular to a method for grinding the lap joint of a turbine case sealing ring. Background technique [0002] With the development of the mechanical processing industry, the processing methods for various parts have been continuously innovated and applied. Among them, grinding processing is required for the lap joint processing of the turbine case seal ring. [0003] In the prior art, in the process of machining the turbine casing sealing ring, it is necessary to process sequentially through multiple processes, so as to finally obtain a turbine casing sealing ring with a qualified size. The turbine casing seal ring is specifically an annular part with an opening. There are two overlapping ends at the opening position. The overlapping portion formed by the two ends needs to be ground to make the outer circle of the overlapping portion smooth and smooth. At the same time, because the stagge...

AI Technical Summary

Problems solved by technology

The turbine casing seal ring is specifically an annular part with an opening. There are two overlapping ends at the opening position. The overlapping portion formed by the two ends needs to be ground to make the outer circle of the overlapping portion smooth and smooth. At the same time, because the staggered depth dimension of the two ends of the lap joint in the direction of the annular circumference is also the inspection dimension that determines the pass rate, this leads to the installation and overall grinding of the turbine case seal ring. In this state, while the lap joint reaches the radial dimension and the staggered depth dimension, the turbine casing seal ring is also ground at other positions on the circumference, which makes the dimensional tolerances at various positions In the case of fluctuating within the range, the possibility of out-of-tolerance for the staggered depth dimension is caused, so that the turbine casing seal ring becomes an unqualified waste product

Moreover, the method of processing the overall circumference also makes it necessary to install and position the circumference accurately in the processing link for the purpose of processing the overlapping parts, so that the convenience and efficiency of processing are low.

[0004] In the above prior art, the defects such as the convenience and low efficiency of processing the overlapping portion of the turbine casing seal ring, and the high rejection rate are technical problems that those skilled in the art need to solve at present.

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