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Positioning method for ceramic core of single crystal turbine working blade

A positioning method and technology of ceramic core, applied in the direction of core, casting mold, casting mold composition, etc., can solve the problem that positioning cannot be used, and achieve the effect of increasing yield, high molding rate and reducing deviation

Active Publication Date: 2018-12-11
辽宁红银金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is more suitable for the positioning of single crystal guide vane ceramic cores, but cannot be used for the positioning of single crystal working blade ceramic cores

Method used

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  • Positioning method for ceramic core of single crystal turbine working blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment designs a core positioning method for single-crystal high-pressure turbine working blades. In the process of making blade wax parts, the outer side of the tenon extension is used as the fixed end of the tenon extension, and the mold is set at the fixed end of the tenon extension. The positioning hole is used as the fixed end of the tenon extension to fix the axial position. In other directions, the extension of the tenon is used as the fixed end, and the exhaust edge extension and blade tip extension are used as the free end. The positioning method of the core blade pot and the blade back Again, the anchor positions are completely symmetrical.

[0028] The width of the tenon of the working blade of the single crystal turbine is 36mm, the height of the tenon is 30mm, the fixed end of the tenon extension section along the height direction is 14mm, the width is 28mm, and the diameter of the positioning hole is 5mm. The extension of the tenon and the positio...

Embodiment 2

[0033] This embodiment designs a core positioning method for single-crystal high-pressure turbine working blades. In the process of making blade wax parts, the outer side of the tenon extension is used as the fixed end of the tenon extension, and the mold is set at the fixed end of the tenon extension. The positioning hole is used as the fixed end of the tenon extension to fix the axial position. In other directions, the extension of the tenon is used as the fixed end, and the exhaust edge extension and blade tip extension are used as the free end. The positioning method of the core blade pot and the blade back Again, the anchor positions are completely symmetrical.

[0034] The width of the tenon of the working blade of the single crystal turbine is 19mm, the height of the tenon is 12mm, the fixed end of the tenon extension section is 15mm in the height direction, the width is 14mm, and the diameter of the positioning hole is 4mm. The extension of the tenon and the position o...

Embodiment 3

[0039] This embodiment designs a core positioning method for single-crystal high-pressure turbine working blades. In the process of making blade wax parts, the outer side of the tenon extension is used as the fixed end of the tenon extension, and the mold is set at the fixed end of the tenon extension. The positioning hole is used as the fixed end of the tenon extension to fix the axial position. In other directions, the extension of the tenon is used as the fixed end, and the blade tip extension is used as the free end. Symmetrical, there is no exhaust channel on the exhaust side, and it is a closed channel.

[0040] The width of the tenon of the working blade of the single crystal turbine is 70mm, the height of the tenon is 54mm, the fixed end of the tenon extension section along the height direction is 19mm, the width is 65mm, and the diameter of the positioning hole is 14mm.

[0041] The exhaust side of the working blade of the single crystal turbine is a closed channel, w...

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Abstract

The invention relates to the technical field of high-temperature alloy investment casting precision casting, in particular to a positioning method of a ceramic core of a single crystal turbine workingblade. In a process of making a blade wax member, the outer side of an extension section of a tenon is used as a fixed end of the extension section of the tenon, a positioning hole is arranged at thefixed end of the extension section of the tenon for fixing an axial position, an extension section of a venting edge is a free end end, an extension section of blade tip is a free end, a core leaf basin is positioned in the same manner as a leaf back, and the position of positioning points is completely symmetrical. The method has the characteristics of stable positioning structure and high bladeforming rate, and especially for the single crystal turbine working blade with a complex inner cavity structure, the integrity of the casting can be greatly improved. The positioning method of the ceramic core of the single crystal turbine working blade can reduce the core shift and the broken core defect in a later casting process, reduce the deviation of wall thickness of a blade casting, and improve the yield of a single crystal superalloy casting.

Description

technical field [0001] The invention relates to the technical field of high-temperature alloy investment precision casting, in particular to a positioning method for a ceramic core of a single-crystal turbine working blade. Background technique [0002] In order to meet the increasing thrust and operating temperature requirements of aero-engines, nickel-based single crystal superalloys are still the preferred material for blades. However, the temperature bearing capacity of the single crystal alloy does not exceed 1150°C, while the gas temperature at the turbine inlet can reach above 1500°C. In addition to coating the surface of the blade, designing a complex cavity cooling structure is also an effective method. Therefore, single-crystal blades with complex cavity structures have become a hallmark of advanced aeroengines. But this also increases the difficulty of the casting process, especially the control of blade shaping and wall thickness. [0003] During the productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/10B22C9/04B22C9/24
CPCB22C9/04B22C9/108B22C9/24
Inventor 孟杰张朝威周亦胄孙晓峰
Owner 辽宁红银金属有限公司
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