Technology for machining conical gas film holes of turbine guide blade

Abstract

The invention provides a technology for machining conical gas film holes of a turbine guide blade. The technology mainly comprises the following steps that (1) a machining mode is selected; (2) a machining electrode is designed and manufactured; (3) a clamp is designed and manufactured; (4) cylindrical micro holes are machined; (5) parts are clamped; (6) the electrode is clamped and aligned; (7) the conical gas film holes are machined; and (8) the conical electrode is trimmed. By the adoption of the machining technology, the machining difficulty of the conical gas film holes is lowered, and thus the technical problem that the conical gas film holes are hard to machine in a blade body and a mounting plate of the high-pressure turbine guide blade is solved; machining and production operation of the blade is effectively guaranteed, production efficiency is greatly improved, it is guaranteed that products can be delivered on schedule, and meanwhile the percent of pass of the finished products is increased; the blank of the technology in the aviation turbine blade micro hole machining industry in China is filled.

Description

technical field [0001] The invention relates to a machining process for a conical air film hole of a turbine guide vane, which belongs to the technical field of precision machining. Background technique [0002] The high-pressure turbine guide vane of a certain type of engine has two structures: double-joint and triple-joint, both of which are composed of a large mounting plate, a blade body, and a small mounting plate. The blade is an equiaxed complex air-cooled hollow blade of investment casting precision casting. Several air film holes are processed on the blade body and mounting plate of the triple high-pressure turbine guide vane, and the air film holes need to be processed into conical air film holes and Cylindrical air film holes with high machining accuracy, the diameter of the air film holes on the blade body is The diameter of the air film hole on the mounting plate is [0003] According to the requirements of the design drawing, process tapered air film holes...

AI Technical Summary

Problems solved by technology

[0004] During the production process of the blade, due to the difficulty of processing the tapered air film hole, and there is no relevant experience to learn from, the processing of the blade cannot be carried out, the production stagnates, the delivery of the product cannot be guaranteed, and it is difficult to guarantee the processing quality of the product. The qualified rate of finished products is low, causing huge economic losses to the company

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