Method for forging annular cylinder by aid of electroslag remelted hollow blank

An electroslag remelting and hollow technology, which is applied in metal processing equipment and other directions, can solve problems such as lengthy process flow, uneven deformation, material waste, etc., and achieve the effect of improving the mechanical properties of products, improving the internal quality, and developing dendrites

Inactive Publication Date: 2012-07-18
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The disadvantage of this forging method is that ① the center material of the solid blank is treated as waste in the punching process, resulting in material wa

Method used

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  • Method for forging annular cylinder by aid of electroslag remelted hollow blank
  • Method for forging annular cylinder by aid of electroslag remelted hollow blank
  • Method for forging annular cylinder by aid of electroslag remelted hollow blank

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Embodiment Construction

[0020] 1. Such as figure 1 As shown, the upsetting spool 1 and the upsetting drum die 2 assembled with it are placed on the press platform, and the heated electroslag remelted hollow blank 3 is placed on the upsetting drum 2 On the drain plate 1 for internal upsetting, put the "T" type anvil 4 for upsetting on the hollow blank 3 of electroslag remelting, and start the press to apply the "T" type anvil 4 to the hollow blank 3 through the upsetting. Press to produce upsetting deformation until the upper surface of the upsetting "T"-shaped anvil 4 is flush with the upper end of the upsetting drum mold 2, and stop applying pressure, and place a cushion block 5 on the upsetting "T"-shaped anvil 4, Start the press again through the spacer block 5 and upsetting with the "T" type anvil 4 to continue to press the hollow blank 3 until the hollow blank 3 reaches the set height H1, and the upsetting blank 10 is obtained;

[0021] 2. Such as figure 2 , image 3 As shown, the lower positionin...

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Abstract

A method for forging an annular cylinder by the aid of an electroslag remelted hollow blank belongs to the technical field of hot forming of annular cylinder forgings. The method is characterized by including the process steps: firstly, performing closed upsetting for the electroslag remelted hollow blank by a set upsetting die on a press to reach the height set in a process; secondly, performing expanding extrusion composite deformation for the upset blank by a set expanding extrusion die on the press; and thirdly, performing shrinkage deformation for the blank after expanding extrusion by a set shrinkage die on the press to meet the requirement of a finished forging on size. The method has the advantages that firstly, materials can be saved and cost can be reduced as compared with the prior art; secondly, in-die forming is adopted, high controllability is achieved, materials are in pressure stress during deformation and can be prevented from cracking, and original defects in a casting blank can be forged; and thirdly, remarkable shearing strain can be generated in the blank by means of in-die upsetting deformation, expanding extrusion composite deformation and shrinkage deformation, dendritic crystal in the electroslag cast blank can be broken to obtain thin and smooth microstructures, and the quality of the materials is improved.

Description

Technical field [0001] The invention belongs to the technical field of hot forming of ring-cylinder forgings, and in particular relates to a method for forging ring-cylinder parts by using electroslag remelted hollow blanks. technical background [0002] At present, the method of forging large ring-tube parts at home and abroad is mainly to use solid blanks, which are heated, upset, and punched to form ring blanks, and then the mandrel is drawn or the horse bar is expanded to the corresponding size. The disadvantage of this forging method is that the center material of the solid blank is treated as waste in the punching process, resulting in material waste and increased energy consumption. ②Long process flow, too many fires, uneven deformation, easy to produce additional stress and cause forging cracks. Summary of the invention [0003] The purpose of the present invention is to provide a method for forging ring cylinder parts from hollow blanks remelted by electroslag, which can...

Claims

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Application Information

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IPC IPC(8): B21J5/06
Inventor 安红萍刘建生武建国郑晓华
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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