Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Laser machining process of special-shaped film hole of turbine blade

A technology of laser processing and turbine blades, which is applied in the direction of metal processing equipment, laser welding equipment, manufacturing tools, etc., can solve the problems of difficult manufacturing and repair, high price, and low processing efficiency, so as to reduce the thickness of recasting layer and facilitate scale The effect of streamlining production and improving surface integrity

Pending Publication Date: 2020-01-03
QINGDAO TECHNOLOGICAL UNIVERSITY
View PDF6 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used method in China is electric discharge machining (EDM), but now complex special-shaped holes often require high three-dimensional precision machining capabilities, and EDM processing is difficult to meet the increasingly high precision requirements
Secondly, EDM processing consumes a lot of tool electrodes, but it is difficult to manufacture and repair, and the price is expensive; at the same time, EDM processing will also produce remelting layers and microcracks, and the post-processing process is complicated and cumbersome
In addition, EDM cannot process non-conductive materials, so in the future blades with thermal barrier coatings, ceramic matrix composite materials, carbon-silicon composite materials and other new material blades with excellent performance will not be able to use EDM
Both electrochemical machining and electrohydraulic beam machining will not produce remelted layers, microcracks, and heat-affected zones, but both have significant limitations, such as low machining efficiency, poor repeatability, and stray corrosion , resulting in difficulty in controlling the contour shape of the opening, etc., which cannot meet the mass production requirements of complex special-shaped holes

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Laser machining process of special-shaped film hole of turbine blade
  • Laser machining process of special-shaped film hole of turbine blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Attached below figure 1 , attached figure 2 The laser processing technology of the cat-ear special-shaped hole of the DD6 superalloy turbine blade disclosed in this embodiment is further explained:

[0067] Import and slice processing of air film hole CAD model. Import the designed three-dimensional special-shaped hole CAD model file into the air film hole laser automatic processing control software V1.0, perform layered slicing processing and generate CNC code that can drive the five-axis motion system.

[0068] Filling and clamping for wall protection. The black silicon carbide purchased in the market needs to be ground and filtered first, and then the small black silicon carbide particles are poured into the blade flow channel through the hole at the top of the turbine blade to fill the internal cavity of the blade. In this way, when the laser passes through the small hole, it is absorbed, reflected, and scattered by the black silicon carbide particles in the cav...

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
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a laser machining process of a special-shaped film hole of a turbine blade. The process comprises the following steps of film hole CAD model introducing and slicing; wall protecting and filling, and blade assembling and clamping; blade surface MARK point identifying / matching automatic positioning and reference correcting; laser machining and online monitoring; post-machining treatment; and industrial CT multi-angle flaw detection and detecting. The machining process has the beneficial effects of realizing precise machining of the complex special-shaped film hole, improving the surface integrity of film hole machining, having great significance for improving the quality of a turbine engine / gas turbine, and providing technical support for the development of a newgeneration turbine-type aero-engine and marine gas turbine.

Description

technical field [0001] The invention belongs to the technical field of laser processing, and in particular relates to a laser processing technology for special-shaped air film holes of turbine blades. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Modern advanced turbo-type aero-engines / gas turbines generally use small-hole film cooling technology to increase the temperature before the turbine, thereby increasing the thrust-to-weight ratio of the engine. The main structural feature of the small-hole film cooling technology is that a large number of film holes are designed on the leading edge of the turbine blade, the airfoil profile, and the edge plate. The angles of th...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/382B23K26/60B23K26/70
CPCB23K26/382B23K26/60B23K26/70
Inventor 邵勇孙树峰王萍萍张丰云胡坤曹颖
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com