Correction device and correction method for inner ring of engine crankcase

Abstract

The invention provides a correction device and a correction method for an inner ring of an engine crankcase. The correction device comprises a correction clamp base, positioning pins and a pressure plate; the tooling surface of the correction clamp base is provided with a circular seam allowance, and the inner side of the seam allowance is provided with a circle of uniform positioning pin holes; and the middle section of the positioning pin has a round table step-shaped columnar structure, the taper of the round table of the middle section is as same as that of the inner ring of the crankcase, and the maximum diameter of the positioning pin enables the positioning pin inserted into the positioning hole not to interfere with a blade of the crankcase. The correction method comprises the following steps of: jointing the seam allowance of the crankcase and the seam allowance on the correction clamp base; inserting the positioning pins into the positioning pin holes, positioning the positioning pins and the inner ring of the crankcase in a two-section contact mode, and then fixing the crankcase on the correction clamp base through the pressure plate; welding the inner ring and the blade of the crankcase; and finally, pouring a glue layer into the inner side of the inner ring of the crankcase, and gluing the inner ring and the blade of the crankcase. The device and the method ensurethe concentricity of the easily-deformed inner ring and the outer crankcase and the ellipticity of the inner ring.

Description

technical field [0001] The invention relates to a shape-correcting device and a shape-correcting method for thin-wall easily deformable parts, in particular to a shape-correcting device and a shape-correcting method for an inner ring of an engine casing. Background technique [0002] The engine casing assembly is a thin-walled weldment, consisting of inner and outer rings and stator blades, which are connected between the inner and outer rings. The inner ring is a typical thin-walled easily deformable sheet metal part, the wall thickness is not greater than 1mm, and the diameter is greater than Φ800mm. When processing parts, the thin-walled inner ring can only control the ellipticity of the part in the limited state, but in the free state, its ellipticity can only be controlled at about 2-4mm, which is far from meeting the requirements of the casing assembly. The use requirements of the inner ring in the design state. From the existing technical means, simply relying on im...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that it is difficult to control the ellipticity of the thin-walled easily deformable inner ring in the prior art, the present invention proposes a shape-calibrating device and a shape-calibrating method for the inner ring of the engine casing. The specific technical scheme for the ellipticity of the thin-walled easily deformable inner ring is as follows:

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