A blade height adjustment fixture

Abstract

The invention discloses a blade height adjustment fixture, which comprises a height adjustment device and a welding fixture of a fan casing; the height adjustment device includes a positioning ring and a lifting ring which are axially stacked sequentially from top to bottom. One end of the groove towards the circumference of the positioning ring is a bevel; the top surface of the lifting ring is provided with several protrusions, the number of protrusions and the grooves are the same and the positions are corresponding, and one end of the protrusion towards the circumference of the positioning ring is a slope. The slope of the bump and the groove is at the same end; the end of the positioning part of the welding fixture is provided with a first arc groove, and the height adjustment device is arranged in the first arc groove, and the bottom surface of the lifting ring and the groove bottom of the first arc groove touch. When the positioning ring and the lifting ring rotate relatively, the relative distance between the positioning ring and the lifting ring can be changed, and the height of the positioning ring can be adjusted, so that the height of the entire blade of the fan casing can be uniformly adjusted through the positioning ring, and the welding process of such parts can be solved. The problem of unstable quality.

Description

technical field [0001] The invention belongs to the field of assembly and welding of fan case assemblies, and relates to a blade height adjusting fixture. Background technique [0002] With the continuous development of science and technology, new processes and new methods have emerged at the historic moment. The requirements for welding precision of fan case are getting higher and higher, and the welding quality is also continuously improving. Such as figure 1 As shown, the fan case assembly is welded by the inner ring of the case and a circle of evenly distributed stator blades. The design requires that the height of more than 100 stator blades meet the requirement of H dimension when the fan casing assembly is at a given cross-sectional position of dimension L. The outer profile of the upper edge plate of the blade is matched with the casing groove, and the blade shape at the blade tip is matched with the inner ring blade hole. Because the wall thickness of the casing, ...

AI Technical Summary

Problems solved by technology

The outer profile of the upper edge plate of the blade is matched with the casing groove, and the blade shape at the blade tip is matched with the inner ring blade hole. Because the wall thickness of the casing, the inner ring and the stator blade is too thin, the thickness is only 1-2mm , the rigidity is poor and easy to deform, and the mating surface is very small. When the blade is installed between the casing and the inner ring, the blade always deviates downward under the action of gravity. The original welding completely depends on the experience of the operator, and each adjustment is done manually. The height of the blades, due to the large number of blades, it is difficult to ensure the uniformity of the axial height of the blades, which cannot meet the design requirements of the fan case assembly

The entire welding process is labor-intensive and inefficient, which has a great impact on the welding accuracy of the parts. The welding process has become the bottleneck link in the production of the parts

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