Loose control method for fine and long thin-wall crowned isometric crystal cast turbine blade

A technology of turbine blades and control methods, applied in casting molding equipment, casting molds, casting mold components, etc., can solve problems such as size difference, large internal stress, blade body cracks, etc., to expand the number of pieces, improve production efficiency, and reduce production. cost effect

Active Publication Date: 2018-06-19
GUIYANG AVIC POWER PRECISION CASTING
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existence of the ingate makes the size of the local area connecting the blade body and the ingate significantly different, which changes the te

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
  • Loose control method for fine and long thin-wall crowned isometric crystal cast turbine blade
  • Loose control method for fine and long thin-wall crowned isometric crystal cast turbine blade

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] (1) Embodiment 1

[0032] 1. Wax mold preparation

[0033] like figure 1 As shown in the figure, in the porosity control method of the slender thin-walled equiaxed crystal casting turbine blade with crown of the present invention, the wax mold combination adopts a straight plate-shaped module, and the runner is "I"-shaped, including the sprue cup 1 and the sprue cup. The transitional drainage cylinder 2 , the tenon end runner 3 , the blade crown end runner 8 and the center column pipe 9 are formed in communication with the pouring cup 1 . The tenon end runner 3 is connected with the blade tenon gate 4, the blade tenon gate 4 is connected with the blade tenon 5, the crown end runner 8 is connected with the blade crown gate 10, and the blade crown gate 10 is connected with The leaf crown 7 is connected. The welding positions on both sides of the "I"-shaped runner correspond to each other, and are symmetrically distributed with respect to the central axis of the central...

Example Embodiment

[0040] (2) Embodiment II

[0041] like figure 2 As shown, in the porosity control method of the slender thin-walled equiaxed crystal casting turbine blade with crown of the present invention, the wax mold combination adopts a circular module, including a sprue cup 1 and a transition connected to the sprue cup 1. The drainage cylinder 2, the tenon end runner 3, the blade crown end runner 8 and the central column pipe 19 are composed. The tenon end runner 3 is in the shape of petals, and the positions are equally divided along the circumference. The tenon end petal-shaped runner 3 is connected with the blade tenon gate 4, the blade tenon gate 4 is connected with the blade tenon 5, and the blade crown end runner 8 is in the shape of a round cake and is connected with the blade crown gate 20. The crown gate 10 is connected to the blade crown 7 .

[0042] In this embodiment, the length of the blade is about 150mm, the maximum wall thickness of the blade is about 5mm, and the mi...

Example Embodiment

[0048] (3) Embodiment III

[0049] The thickness of the insulation cotton used is 13mm. The implementation of the remaining steps is carried out with reference to the requirements for the preparation of wax molds, the preparation of mold shells, and the smelting and casting process in Example I, Example II or Example III.

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
Thicknessaaaaaaaaaa
Lengthaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of investment pattern precision casting, in particular to a loose control method for a fine and long thin-wall crowned isometric crystal cast turbine blade. According to the provided loose control method for the fine and long thin-wall crowned isometric crystal cast turbine blade, a blade body inner pouring gate does not need to be additionally arrangedduring wax pattern combination, the opening design is made on a prepared shell when the 1/3 section of the middle portion of a blade body is wrapped by heat preservation cotton, the temperature at the blade body cotton wrapping opening position of the shell is low, solidification is fast, and the 1/3 section of the middle portion of the blade body can be promoted to be preferably solidified; goodfeeding can be provided for the preferably-solidified 1/3 section of the middle portion of the blade body through the non-solidified or slowly-solidified tenon end blade body 1/3 section and the blade crown end blade body 1/3 section, good feeding can be provided for the tenon end blade body 1/3 section and the blade crown end blade body 1/3 section through a blade crown inner pouring gate, a tenon inner pouring gate and a transverse sprue, accordingly, the sequential solidification mode that the 1/3 section of the middle portion of the blade body is preferably solidified can be achieved, andthe loose degree of the fine and long thin-wall crowned isometric crystal cast turbine blade can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of investment precision casting, in particular to a porosity control method for a thin-walled crowned equiaxed crystal casting turbine blade. Background technique [0002] The shape and size of aero-engine turbine blades vary greatly depending on the design of the engine. In general, aero-engine turbine blades with a length-to-width ratio of more than 3 are called slender blades, and blades with a minimum wall thickness of less than 1mm are called thin-walled blades. blade. Aeroengine turbine blades are manufactured by investment casting. The process used for casting equiaxed crystal blades is generally a rapid solidification process. Due to the existence of a certain temperature range for alloy solidification, the liquid alloy in the final stage of solidification of the blade casting or its hot spots The casting cannot be effectively fed, so porosity develops inside the blade casting. Part of the loosenes...

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
IPC IPC(8): B22C9/04B22C9/08B22C9/22B22D27/04
Inventor 任维鹏陈通张丽辉关心光齐闯
Owner GUIYANG AVIC POWER PRECISION CASTING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap