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Method for forming turbine blade through round bar multi-directional die forging

A steam turbine blade and multi-directional die forging technology, which is applied to the multi-directional die forging of small blade forgings and the field of multi-directional die forging of round bar materials to form steam turbine blades, and can solve the problem of low material utilization and numerous process steps in the free forging manufacturing process To achieve the effect of improving the controllability of product quality, reducing production processes, and reducing manufacturing costs

Active Publication Date: 2016-07-27
TIANJIN HEAVY EQUIP ENG RES +1
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of numerous unidirectional die forging manufacturing processes of small blades and low utilization rate of free forging manufacturing process materials, the present invention provides a process method for forming small blades by multi-directional die forging of round bar-shaped blanks, which is suitable for heights less than 500mm Forming and manufacturing of small blade forgings

Method used

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  • Method for forming turbine blade through round bar multi-directional die forging
  • Method for forming turbine blade through round bar multi-directional die forging
  • Method for forming turbine blade through round bar multi-directional die forging

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Embodiment Construction

[0035] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0036] The present invention adopts a process method for forming a small blade forging of a steam turbine by heating and die-forging a round rod-shaped blank at one time, which is realized through the following steps:

[0037] (1) Design the forging drawing according to the blade parts drawing, the design blade body one-way allowance is 1.5mm~3.5mm, and the one-way allowance of the blade body section near the blade root is close to 1.5mm, preferably 1.5mm, which is close to the blade. The one-way allowance of the blade section of the top part is close to 3.5mm, preferably 3.5mm, and the forging allowance of the rest can be taken close to 2.5mm, preferably 2.5mm. Based on this, draw the forging drawing, such as figure 1 As shown, the three-dimensional model of blade forgings is established by modeling software;

[0038] (2) In the coordinate system of the ...

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Abstract

The invention discloses a method for forming a turbine blade through round bar multi-directional die forging. The method is suitable for manufacturing small blade forgings through one time of heating and forming. The method comprises the main process steps that (1) a whole round bar blank is heated to a temperature higher than the austenitic transformation temperature; (2) a die is formed by an upper die body, a lower die body, a blade top punch and a blade root punch, the punches are operated to given positions at first, the blank is placed on a punch positioning boss, and then the upper die body and the lower die body are assembled to form a blade body part; and (3) the blade top punch and the blade root punch move oppositely to form a blade top part and a blade root part. The blank forming and preforming procedures are avoided, a special preforming die does not need to be prepared, and the method is suitable for one time of heating and forming of the small blade forgings.

Description

Technical field [0001] The invention relates to a process method for forming steam turbine blades by multi-directional die forging of round bar materials, and is particularly suitable for multi-directional die forging manufacturing of small blade forgings, and belongs to the technical field of advanced material forming. Background technique [0002] Steam turbines are widely used in various social and economic sectors. Blades are the largest number of parts in steam turbines and are suitable for mass production. Blades play a key role in energy conversion. They are the "heart" parts of steam turbines and require high performance. Therefore, blade forging is suitable for the production of blades. The typical leaf structure consists of three parts: the root, the body and the tip. The blades are classified according to the length of the steam outlet side, the length <500mm belongs to the small blade, the length of 500~1000mm belongs to the medium blade, the length of 1000~1500mm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02
Inventor 刘晓芹李忠磊刘颖郭义
Owner TIANJIN HEAVY EQUIP ENG RES
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