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Wax injection mold for investment casting of hollow turbine blade and its rapid manufacturing method

A technology of turbine blade and investment casting, which is used in manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of high cost, long production cycle, poor accuracy, etc., and achieve low manufacturing cost, short cycle, and guaranteed accuracy. Effect

Inactive Publication Date: 2016-07-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims at the problem of poor precision existing in the rapid manufacturing scheme of the existing wax injection mold, and the problems of high cost and long production cycle of the existing wax injection mold core positioning scheme, and invents a new wax injection mold Construction and Rapid Manufacturing Solutions

Method used

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  • Wax injection mold for investment casting of hollow turbine blade and its rapid manufacturing method
  • Wax injection mold for investment casting of hollow turbine blade and its rapid manufacturing method
  • Wax injection mold for investment casting of hollow turbine blade and its rapid manufacturing method

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Embodiment Construction

[0085] The present invention will be further described below in conjunction with drawings and embodiments.

[0086] An embodiment of a wax injection mold for investment casting of hollow turbine blades, such as Figure 1-11 shown.

[0087] A wax injection mold for investment casting of hollow turbine blades, which is mainly composed of a cavity mold, a core 2000 and ancillary structures, and the cavity mold includes an upper mold 1100 and a lower mold 1200, such as Figure 4 As shown, the upper mold is used for forming the back surface of the turbine blade, and the lower mold is used for forming the basin surface of the turbine blade. Both the upper mold and the lower mold are combined structures, and the upper mold is composed of a blade root block 1110, a blade body block 1120 and an end cover plate 1130 ( figure 1 ), the lower mold is composed of the main cavity block 1210 and the end cover plate 1230 ( figure 1). Each block of the upper mold and the lower mold is made ...

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Abstract

The invention discloses a wax injection mold for investment casting of hollow turbine blades and a method for rapidly and accurately manufacturing the wax injection mold. The mold consists of a cavity mold, a mold core and an accessory structure, wherein the cavity mold comprises an upper mold and a lower mold of a combined structure; each mold block forming the cavity mold consists of an external aluminum mold frame, an internal cast zinc alloy inlay and a conformal cooling copper pipe embedded into the inlay; a mold core positioning piece which can be decomposed at a high temperature is arranged on a longitudinal rib of the mold core; and water-soluble core blocks used for forming exhaust openings in the rear edges of the turbine blades are arranged on rear edge ribs of the mold core. The matching precision of the mold core positioning piece and the cavity mold is guaranteed by adopting a cavity mold interior running-in method, and the matching precision of the water-soluble core blocks and the cavity mold is guaranteed by adopting a cavity mold interior adhesion method. The wax injection mold disclosed by the invention is low in manufacturing cost and short in period, and the high wax pattern precision and core positioning precision can be obtained.

Description

technical field [0001] The invention relates to the technical field of rapid mold making, in particular to the structure of a wax injection mold for investment casting of thin-walled hollow parts and its rapid manufacturing method, in particular to a wax injection mold for investment casting of hollow turbine blades and rapid manufacturing methods thereof. Background technique [0002] Hollow air-cooled turbine blades are key parts in gas turbines and aero-engines. Due to the complex internal cooling channels and the need to use single crystal casting technology to improve high temperature resistance, they are all produced by investment casting. In investment casting, the precise manufacture of wax patterns is the primary link to obtain precision castings. In the mass production stage, the blade wax pattern can be pressed in a precision-machined hard metal mold, and the manufacturing cost of the mold can be shared by the mass-produced blades; but in the product pre-research...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C7/02B22C9/04B22C9/24
CPCB22C7/02B22C9/04B22C9/24
Inventor 刘泗岩徐赛男廖文和叶文华张亮亮
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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