Turbine blade air film hole precision forming method

A turbine blade and precision forming technology, applied in chemical instruments and methods, self-solidification method, casting mold composition, etc., can solve the problems of uncontrollable machining dimensional accuracy, inability to process special-shaped holes and multi-angle inclined holes, and low machining efficiency. , to reduce the recast layer and micro-cracks, speed up the rapid research and development, and eliminate the positioning error.
CN110732637AInactive Publication Date: 2020-01-31XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2020-01-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a turbine blade air film hole precision forming method, and belongs to the field of rapid casting based on a photocuring forming technology. The turbine blade air film hole precision forming method comprises the following steps: 1) manufacturing a turbine blade resin mold by using the photocuring rapid forming technology; 2) pouring ceramic slurry into a resin mold prototype of a turbine blade through a gel casting method to obtain a casting mold blank body, so that forming of an air film hole ceramic core is realized; 3) further strengthening the air film hole ceramiccore through vacuum freeze drying and high-temperature sintering, so that forming of different ceramic-based air film hole ceramic cores is realized; and 4) for the air film hole ceramic cores with different types of ceramic bases, combining a directional solidification technology to realize air film hole casting forming of various high-temperature alloys, and finally removing the ceramic cores remained in a metal blade and an air film hole through a core removing process, so that high-quality forming of the cast air film hole is realized. The turbine blade air film hole precision forming method is reasonable in design and simple and convenient to operate, and can realize forming of the high-quality cast air film hole.
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Description

technical field

[0001] The invention belongs to the field of rapid casting based on light curing molding technology, and relates to a precision forming method for air film holes of turbine blades. Background technique

[0002] Hollow turbine blade high-efficiency film cooling technology is one of the core technologies in the development of heavy-duty gas turbines, and the film holes are developing in the direction of miniaturization, irregular structure and dense distribution. At present, the air film cooling holes of blades are realized by post-processing. After the blade casting blank is polished and trimmed to determine the process reference plane, laser drilling, electric spark drilling, electro-hydraulic beam drilling and other methods are used to realize the processing of gas film holes.

[0003] Laser drilling technology uses the high temperature at the laser focus point to instantly melt and vaporize the blade material, and the melted and vaporized substances are ej...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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