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

Wax mold assembly structure of a single-crystal blade with integral casting of cover plate and cantilever structure

A technology of single crystal blades and wax molds, which is applied in the direction of casting molding equipment, etc., can solve the problems of small casting aperture, inability to locate, and exposed cores, so as to reduce the forming tendency and solve the effect of easily eccentric or exposed cores

Active Publication Date: 2022-03-15
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, at present, research on cantilever single crystal blade castings is rarely carried out in China.
[0004] Due to the integral casting of the blade cover plate and the small casting hole diameter on the cover plate, the ceramic core of the blade (the part where the casting hole of the blade tip is formed) is easily broken
In addition, the blade is a cantilever structure, which cannot be positioned, which leads to defects such as core eccentricity, exposed core, and miscellaneous crystals and stripe crystals in the blade during the directional solidification process.
However, the combination of wax patterns is the main factor affecting the above defects

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
  • Wax mold assembly structure of a single-crystal blade with integral casting of cover plate and cantilever structure
  • Wax mold assembly structure of a single-crystal blade with integral casting of cover plate and cantilever structure
  • Wax mold assembly structure of a single-crystal blade with integral casting of cover plate and cantilever structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The following examples will further illustrate the present invention, but do not limit the present invention thereby.

[0025] The invention provides a wax mold assembly structure for integral casting of a cover plate and a single crystal blade with a cantilever structure. The specific preparation sequence includes: core preparation, wax pressing, combination, coating, dewaxing and the like.

[0026] The traditional core fixing process of sheet transfer is as follows: figure 1 , the tail beam at the bottom extends out of the wax sheet as a fixed end; while the blade core of the wax mold assembly structure of the present invention has no fixed end in a strict sense, the top of the blade core is provided with a core head, the bottom is provided with a tail beam, and the core The tail boom is stopped inside the wax sheet, and two pairs of windows with a diameter of 4-7mm are opened on the side of the tail boom, and then fixed by paint, such as figure 2 shown.

[0027] I...

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

No PUM Login to View More

Abstract

The invention belongs to the field of complex hollow single-crystal blade casting, and in particular relates to a wax mold assembly structure of a single-crystal blade with integral casting of a cover plate and a cantilever structure. Since the blade cover plate is integrally cast and the casting hole diameter on the cover plate is small, the ceramic core of the blade (the part where the casting hole of the blade tip is formed) is easily broken. In addition, the blade is a cantilever structure, which cannot be positioned, which leads to defects such as eccentricity, exposed core, and miscellaneous crystals and stripe crystals in the blade during the directional solidification process. However, the combination of wax patterns is the main factor affecting the above defects. The invention solves the problem of blade eccentricity by rationally designing the ceramic core boss at the tip margin of the blade; rationally designing the degree of freedom of the core and the fixed end based on the expansion difference between the core and the shell to avoid fracture of the core; and adjusting the position of the sprue Reduces propensity for blade defect formation. The pass rate of single crystal blades formed by the molding method of the invention is relatively high.

Description

technical field [0001] The invention belongs to the field of complex hollow single-crystal blade casting, and in particular relates to a wax mold assembly structure of a single-crystal blade with integral casting of a cover plate and a cantilever structure. Background technique [0002] Single crystal superalloy blades are the core hot-end components of advanced aerospace, gas turbines and ship engines, and their performance largely determines the comprehensive performance of advanced power systems. [0003] With the continuous development of advanced engines, the traditional process route of separate casting and combined welding of blades and cover plates cannot meet the development needs of engines. Therefore, the integral casting technology of the cover plate is considered to be the development trend of complex hollow blades in the future. In addition, there are few researches on cantilever single crystal blade casting in China at present. [0004] Since the blade cover...

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 Patents(China)
IPC IPC(8): B22C7/02
CPCB22C7/02
Inventor 王栋申健董加胜张健楼琅洪
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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