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A device and method for accurately preparing cooling holes of turbine blades by picosecond laser

A cooling hole and ultra-fast laser technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of expensive, difficult to apply, high operation and maintenance costs, and achieve low maintenance and use costs, high processing quality, The effect of reducing energy loss

Active Publication Date: 2022-03-29
BEIJING UNIV OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a device and method for accurately preparing cooling holes of turbine blades by picosecond laser, which is used to solve the problems caused by the upper and lower surfaces of the blades and the inner wall of the cavity during the processing of blade cooling holes such as EDM and long pulse width laser processing. Defects such as recasting layers in the heat-affected zone, while overcoming the relatively complex structure, high price and high operation and maintenance costs of femtosecond lasers, which are difficult to apply to actual production and medium-level technical and engineering applications

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  • A device and method for accurately preparing cooling holes of turbine blades by picosecond laser

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0032] The invention involves the use of a fixed laser beam, a six-position translation platform to clamp the workpiece to be processed, CCD real-time monitoring and feedback, according to different material types and processing requirements, the use of corresponding processing methods and process parameters, and the realization of the process through integrated programming software A high-quality and high-efficiency gas film hole preparation method and device for controlled automatic processing.

[0033] Specifically, it can be achieved by the following methods:

[0034] Step 1. Perform equipment attribute selection and performance debugging according to the material type of the workpiece to be processed; program writing and software setting according to the parameters of the gas film hole to be processed;

[0035] Step 2: Directly irradiate the...

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Abstract

A device and method for precisely preparing cooling holes of turbine blades by picosecond laser belong to the field of ultrafast laser precision machining. By controlling the control software integrating coaxial CCD, laser and 6DOF translation stage, the machining process of turbine blade cooling holes is divided into two stages: equipment attribute selection and programming, machining work development and real-time monitoring. Using a fixed-position Gaussian beam emitted by a picosecond solid-state laser, a six-degree-of-freedom translation stage clamps the workpiece to move, so that the picosecond laser irradiates the workpiece surface along a preset path, and the laser interacts with the material, thereby to be processed. The invention can realize high-quality cooling hole machining with high roundness, low taper, no microcracks and heat-affected zone.

Description

technical field [0001] The invention belongs to the field of ultrafast laser precision machining, and in particular relates to a device and method for accurately preparing cooling holes of turbine blades by picosecond laser. Background technique [0002] The engine thrust-to-weight ratio is an important index to measure the technical performance of the engine. The key to increasing the thrust-to-weight ratio is to improve the thermal efficiency, which further puts forward requirements for the high-temperature performance of the turbine blades. At present, the temperature in front of the engine turbine has exceeded 2000K, which has far exceeded the normal working temperature of the current blade superalloy material. Generally, high-quality air film hole cooling technology is used to solve this problem. [0003] Traditional processing of gas film holes mainly adopts special processing methods, including EDM drilling, electrochemical drilling, long pulse laser drilling, etc. H...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/382B23K26/064B23K26/70
CPCB23K26/382B23K26/0648B23K26/702
Inventor 刘富荣孙腾李文强韩钊李玉陈清远
Owner BEIJING UNIV OF TECH
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