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Pattern correction method of investment casting engine blade and pattern correction mould of method

A technology of engine blades and investment casting, which is applied in the direction of forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems that the casting deformation cannot be predicted, the casting size cannot meet the requirements, etc., and achieve the effect of improving the production pass rate

Inactive Publication Date: 2016-09-28
FALCON AEROTECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides a method for correcting the shape of investment casting engine blades, which can solve the problem that the casting size of the existing investment casting engine blades cannot meet the requirements due to the unpredictable casting deformation during the casting process ; For this reason, the present invention also provides this special-purpose correcting mold for the correcting method

Method used

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  • Pattern correction method of investment casting engine blade and pattern correction mould of method
  • Pattern correction method of investment casting engine blade and pattern correction mould of method

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Embodiment 1

[0021] Embodiment 1: For a titanium alloy engine blade used on an aero-engine, the investment casting method is used to obtain a casting with almost no margin. The precision casting is 310 mm long and 50 mm wide. 7mm, the blade body of this blade is relatively thin, and it is easy to deform during the casting process. It is still difficult to make the final size of the engine blade casting meet the requirements of the design drawings through wax model calibration; the calibration method of the present invention is used to correct the engine blade The casting is corrected, the specific calibration steps are as follows:

[0022] According to the size and structure of the titanium alloy blade casting, the same titanium alloy material as the casting material is used to process the special calibration mold, see figure 1 with figure 2 , the special calibration mold includes an upper mold 10 and a lower mold 20, and the upper mold 10 and the lower mold 20 are respectively processed...

Embodiment 2

[0028] The difference between this embodiment and Embodiment 1 is that the material of the mold used for calibration in Embodiment 1 is the same as that of the casting, which is a titanium alloy material. The size, weight and placement position of the molded parts have been modified. The size of the upper mold for the school mold in this embodiment is selected as 60mm wide and 220g in weight. The placement positions are respectively close to the bottom and upper part of the blade body. Other settings Same as Embodiment 1.

[0029] After the hot isostatic pressing treatment, the castings were taken out, and the size of the parts was detected by a three-coordinate instrument, and the pass rate of precision castings that met the design requirements of the drawings reached 83%.

[0030] The casting mold is used to calibrate the casting, which solves the deformation problem of the casting and achieves the purpose of precise control of the casting size.

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Abstract

The invention provides a pattern correction method of an investment casting engine blade. The problem that in the casting process of an existing investment casting engine blade, casting deformation cannot be prejudged, and consequently, the size of a casting cannot meet the requirement is solved. A special pattern correction mould is machined and manufactured according to the design size of an engine blade casting, a pattern correction cavity matched with the design profile of the engine blade casting is machined in the dedicated pattern correction mould, then the engine blade casting is put into the pattern correction cavity of the dedicated pattern correction mould, the engine blade casting is put into a hot isostatic pressing treatment furnace along with the dedicated pattern correction mould to be subject to hot isostatic pressing treatment, and the dedicated pattern correction mould carries out pattern correction on the engine blade casting while the engine blade casting is subject to hot isostatic pressing treatment. Therefore, the invention further provides the dedicated pattern correction mould used for the pattern correction method.

Description

technical field [0001] The invention relates to the technical field of processing engine blades, in particular to the technical field of processing engine blades by investment casting, and specifically relates to a method for correcting the shape of investment casting engine blades and a mold for correcting the shape thereof. Background technique [0002] Aeroengine blades are one of the core components of the engine. The function of the blade on the engine and its working characteristics determine that the blade is the part of the engine with complex shape, large size span, severe stress and the largest load. At present, aeroengine blades usually need to be made of materials such as titanium alloys, aluminum alloys, and high-temperature alloys with a high degree of alloying. In order to meet the requirements of high performance, operating safety, reliability and life of the engine, the blade must have precise dimensions, precise shape and strict surface integrity. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D3/14B21D53/78B21D37/10B21D37/01
CPCB21D3/14B21D37/01B21D37/10B21D53/78
Inventor 刘飞扬黄爱军
Owner FALCON AEROTECH LTD
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