Method for reducing residual stress of high-speed extrusion formed blades

A technology of extrusion forming and residual stress, which is applied in the field of forging, can solve problems such as complex process, high energy consumption, and increased manufacturing cost, and achieve the effects of reducing residual stress, improving pass rate, and reducing bending deformation

Active Publication Date: 2020-01-17
CHINA HANGFA SOUTH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, these solutions have high energy consumption, and on the other hand, the process is more complicated, so the manufacturing cost will be greatly increased.

Method used

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  • Method for reducing residual stress of high-speed extrusion formed blades
  • Method for reducing residual stress of high-speed extrusion formed blades
  • Method for reducing residual stress of high-speed extrusion formed blades

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Embodiment Construction

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. Wherein, the same parts adopt the same reference numerals.

[0031] As mentioned in the background art, the existing high-speed extrusion molding process has the disadvantages of large residual stress and easy bending deformation of the blade. The inventor has carried out in-depth calculation and analysis on its principle, see figure 2 As shown, in the cavity of the blade body part formed by the blade pot mold 11 and the blade back mold 12, since the contour line of the blade back is longer than the contour line of the blade pot, when the blade blank is extruded at a high speed , the surface area of ​​the metal in contact with the leaf back mold 12 is greater than the surface area in contact with the leaf basin mold 11, which eas...

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Abstract

The invention discloses a method for reducing residual stress of high-speed extrusion formed blades. The method comprises the following steps: (A) basic molded surfaces and parameters of correspondingcharacteristic sections of blade blanks are obtained according to theoretical blade profile data of blade parts; (B) new blade basin part curves are obtained on each characteristic section of the blade blanks obtained by the step (A); (C) continuous and complete molded surfaces and parameters of blade body parts of new blade blanks are obtained after molded surfaces and parameters of all characteristic sections of the new blade blanks obtained in the step (B); and (D) new blade basin molds are designed according to the molded surfaces and the parameters of the new blade blanks obtained in thestep (C) to manufacture the new blade blanks. The method for reducing the residual stress of the high-speed extrusion formed blades can effectively control the residual stress of the blades in the high-speed extrusion forming process to greatly improve the subsequent machining pass percent of the blade blanks.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a method for reducing the residual stress of high-speed extrusion-formed blades during the manufacture of aero-engine blades when blade blanks are manufactured using a high-speed extrusion-forming process. Background technique [0002] The blade is one of the important parts of the aero-engine. For the blade, the accuracy of the surface size of the airfoil is very important. The compressor blade is located near the air inlet of the aero-engine. This type of blade is generally made of blade blank by forging forming process, and then enters the subsequent process for precision machining (including electrolysis, digital milling, polishing, etc.). [0003] figure 1 It is a schematic diagram of the process principle of high-speed extrusion of the blade; figure 2 for figure 1 Schematic diagram of the sectional structure of the airfoil part of the forming female mold. In order to fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C25/10
CPCB21C25/02B21C25/10
Inventor 江杨辉朴学华隆如军秦婷婷彭谦之张强
Owner CHINA HANGFA SOUTH IND CO LTD
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