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Method for correcting bending and twisting size of turbine blade

A turbine blade, bending and twisting technology, which is applied to casting molding equipment, casting molds, cores, etc., can solve the problems of statistical deformation-verification-dressing that takes a lot of time, high cost, and long cycle, and shortens the problem of bending and torsion control. , the effect of improving production efficiency and reducing trial production costs

Pending Publication Date: 2022-03-18
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This anti-deformation technology has two deficiencies when dealing with out-of-tolerance precision casting turbine blades: First, it is necessary to count a certain batch of precision casting turbine blade sizes to determine the average deformation of precision casting turbine blades. The cost is high; second, the process of statistical deformation-verification-repair takes a lot of time and the cycle is long

Method used

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  • Method for correcting bending and twisting size of turbine blade
  • Method for correcting bending and twisting size of turbine blade
  • Method for correcting bending and twisting size of turbine blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The maximum height of a certain type of gas turbine blade is 290mm, the chord width is 49-53mm, the maximum thickness of the airfoil is 5.5-13mm, the twist of each section of the airfoil relative to its own theoretical surface is not more than ±15', and the bending is within ±0.25mm Inside.

[0044] When correcting the bending and torsion size of the precision casting turbine blade, the implementation steps are as follows:

[0045] Step 1: Manufacture the airfoil correction film conforming to the blade back of the precision-cast turbine blade;

[0046] Step 2: Paste 0.2mm wax sheets on both ends of the leaf shape correction membrane;

[0047] Step 3: Press the wax model corresponding to the precision-cast turbine blade, take it out immediately and place the back of the blade on the corresponding position of the blade shape correction membrane pasted with the wax sheet;

[0048] Step 4: Place a 500g sand bag in the middle of the precision casting turbine blade wax mode...

Embodiment 2

[0059] The maximum height of precision cast turbine blades for a certain type of gas turbine is 320mm, the chord width is 48-53mm, the maximum thickness of the blade profile is 5-12mm, and the twist of each section of the blade body relative to its own theoretical profile is not greater than ±15', and the bending Within ±0.25mm.

[0060] When correcting the bending and torsion size of the precision casting turbine blade, the implementation steps are as follows:

[0061] Step 1: Manufacture the airfoil correction film conforming to the blade back of the precision-cast turbine blade;

[0062] Step 2: Paste 0.2mm wax sheets on both ends of the leaf shape correction membrane;

[0063] Step 3: Press the wax model corresponding to the precision-cast turbine blade, take it out immediately and place the back of the blade on the corresponding position of the blade shape correction membrane pasted with the wax sheet;

[0064] Step 4: Place a 500g sand bag in the middle of the precisio...

Embodiment 3

[0074] A certain type of gas turbine working precision casting turbine blade is about 245mm long, the chord width is 75-85mm, and the maximum thickness of the blade shape is about 13mm. The twist of each section of the airfoil relative to its own theoretical profile is not more than ±15', and the bending is within ±0.30mm.

[0075] When correcting the bending and torsion size of the precision casting turbine blade, the implementation steps are as follows:

[0076] Step 1: Manufacture the airfoil correction film conforming to the blade back of the precision-cast turbine blade;

[0077] Step 2: Paste 0.2mm wax sheets on both ends of the leaf shape correction membrane;

[0078] Step 3: Press the wax model corresponding to the precision-cast turbine blade, take it out immediately and place the back of the blade on the corresponding position of the blade shape correction membrane pasted with the wax sheet;

[0079] Step 4: Place a 500g sand bag in the middle of the precision cast...

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Abstract

The method for correcting the bending and twisting size of the turbine blade comprises the following steps that firstly, wax sheets with the thickness ranging from 0.4 mm to 1 mm are fixed to the two ends of a blade profile correcting blank film conforming to the blade back of the turbine blade to be corrected, and the treated blade profile correcting blank film is obtained; 2, a wax mold corresponding to the turbine blade to be corrected is placed on the treated blade profile correction tire mold; and 3, a heavy object matched with the shape of the wax mold in the step 2 is placed in the center of the wax mold in the step 2 in the width direction of the wax mold in the step 2 to be pressed, the wax mold with the corrected bending and twisting size is obtained, investment casting is conducted on the obtained wax mold with the corrected bending and twisting size, and the turbine blade with the corrected bending and twisting size is obtained. Through a wax mold pre-deformation mode, the bending and twisting size reverse deformation can be quickly and effectively obtained, qualified castings are manufactured and applied to early wax mold control, the trial-manufacturing cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of investment precision casting, in particular to a method for correcting the bending and torsion size of a turbine blade. Background technique [0002] The gas turbine is the power source of the modern manufacturing industry, and the precision casting turbine blade is one of the core components of the gas turbine. Generally, the investment casting method is used to produce the high temperature alloy precision casting turbine blade. Due to the structure of the precision casting turbine blade and the setting of the gating system, the precision casting turbine blade will generate large thermal stress during the solidification and cooling process, resulting in surface deformation of the precision casting turbine blade, bending and twisting out of tolerance, and precision casting The scrap rate of turbine blades is high. Therefore, how to solve the problems of out-of-tolerance and out-of-tolerance deformation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02B22C9/04B22C9/28
CPCB22C7/02B22C9/04B22C9/28
Inventor 尹冬梅赵刁刁宋建兵尚相男李慧郭昌东逯雯君巩轩
Owner AECC AVIATION POWER CO LTD
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