Composite processing method and device for blade air film hole

A composite processing and processing device technology, applied in metal processing and other directions, can solve the problems of low efficiency of single crystal alloys, thermal damage, inability to process thermal barrier coatings, etc., to eliminate residual stress, the method is simple and easy, and the punch The effect of efficiency and quality

Active Publication Date: 2021-10-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a composite processing method and device for performing laser-assisted drilling, electrolysis, and post-polishing post-treatment on superalloy blades with thermal barrier coatings, so as to solve the problem that conventional electrical processing methods cannot process thermal Barrier coatings, and ultrashort pulse laser processing of single crystal alloys have disadvantages such as low efficiency and thermal damage

Method used

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  • Composite processing method and device for blade air film hole
  • Composite processing method and device for blade air film hole

Examples

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Effect test

Embodiment 1

[0030]Example 1: This example is a composite processing method of laser-assisted drilling, electrolysis, and post-polishing post-treatment for superalloy blades with thermal barrier coatings. The outer surface of the quartz rod is coated and embedded in the drill bit , so that the laser beam produces total reflection inside the quartz rod, and then irradiates on the surface of the material to be processed, resulting in a local high temperature area, softening the material near the drill bit contact position, greatly reducing the drilling difficulty, increasing the drilling efficiency, and improving the drilling quality. After drilling through, with the drill bit as the cathode and the blade material as the anode, the drill bit rotates at a high speed and moves up and down, and performs electrolytic post-treatment on the metal part of the gas film hole to eliminate the residual stress, microcracks, and thermal damage areas of the hole wall; at the same time, the electrolyte in th...

Embodiment 2

[0034] Example 2: Coaxially embed the coated quartz rod in the drill bit, utilize the low absorption and total reflection of the laser in the quartz rod, irradiate the laser energy evenly on the surface to be processed, soften the material, and improve the drilling efficiency And quality, and rely on electrolysis and particle impact scratching to further improve the quality of air film holes. The processing method is divided into two steps. First, through laser heating to assist drilling, the required size of the air film hole is quickly drilled on the thermal barrier coating and the superalloy substrate; second, the high-speed rotating drill bit is used as the cathode, and the blade is used as the anode. , the drill bit moves up and down, and performs on-line electrolytic post-treatment on the gas film holes of the metal substrate to eliminate the residual stress and heat-affected zone defects during the drilling process; at the same time, there are tiny abrasive particles sus...

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Abstract

The invention discloses a compound processing method and device for blade air film holes, which relate to the field of special processing, through laser heating to assist drilling, and quickly drill air film holes of required size on a thermal barrier coating superalloy substrate; secondly, The high-speed rotating drill bit is used as the cathode, the blade is used as the anode, and the drill bit moves up and down to perform online electrolytic post-treatment on the gas film holes of the metal substrate to eliminate residual stress and heat-affected zone defects during the drilling process; at the same time, the electrolyte is suspended There are tiny abrasive particles, driven by the high-speed rotating drill bit, to perform micro-impact scratches on the hole wall, resulting in a similar grinding and polishing effect, and further improving the overall inner wall quality of the gas film hole including the thermal barrier coating. The method is simple and easy, the laser transmission is not affected by the surrounding environment, the environment adaptability is strong, and there is no need for multiple tool setting, which solves the problem that the conventional electrical machining method cannot process the thermal barrier coating, and the laser processing single crystal alloy has low efficiency and easily generates heat. defects such as damage.

Description

technical field [0001] The invention relates to the technical field of special processing, in particular to a composite processing method and device for laser-assisted drilling, electrolysis, and post-polishing treatment of air film holes in a blade with a thermal barrier coating. Background technique [0002] Increasing the combustion gas temperature at the turbine part is an important means to improve the performance of the aero-engine. However, limited by the performance of the engine blade material, excessive temperature will cause the blade metal material to fail. A layer of ceramic-based material is prepared on the surface of the blade at the high-temperature end of the engine to form a thermal barrier coating to separate the high-temperature gas from the metal material of the blade, thereby achieving the purpose of protecting the blade and slowing down the temperature rise. At the same time, a cold air channel is left inside the blade, and micro-holes are drilled on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B23H5/06B23H5/14B23P25/00
CPCB23H5/06B23H5/14B23P15/00B23P25/006
Inventor 朱浩杜文武王超张朝阳徐坤赵斗艳冒森山
Owner JIANGSU UNIV
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