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Hot forging forming method for cylindrical forged piece

A cylindrical and forging technology, used in forging/pressing/hammer devices, forging/pressing/hammering machinery, applications, etc., can solve the problems of mandrel drawing process forming, the difference between the inner and outer diameters is not large, and the forming cannot be used. , to avoid poor stress conditions, improve production efficiency, and improve the qualification rate.

Active Publication Date: 2015-01-28
CHINA ERZHONG GRP DEYANG HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, in the production of cylindrical forgings, there are many cylindrical forgings with long blind holes, little difference in internal and external diameters, and small wall thickness, which cannot be formed by traditional upsetting punching and mandrel elongation processes.

Method used

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  • Hot forging forming method for cylindrical forged piece
  • Hot forging forming method for cylindrical forged piece
  • Hot forging forming method for cylindrical forged piece

Examples

Experimental program
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Embodiment 1

[0055] Manufacture punch 1, cylinder die 2, chassis 3 according to the design size of the cylindrical forging that needs to be manufactured; the design length of the cylindrical forging is L=1740mm, the design outer diameter is Φ1=φ720mm, and the design inner diameter is Φ2=φ430mm, The design depth of the inner cavity is H=1740; the drain plate 5 is manufactured; the minimum diameter of the leak hole on the leak plate 5 is greater than Φ2=φ410mm, which is equal to φ500mm;

[0056] The punch 1 has a diameter of Φ3 and a length of H4, the Φ3=Φ2, H4=1900mm>L; the inner cavity of the barrel mold 2 has an inner diameter of Φ4=Φ720mm and a height of H5=1740mm,

[0057] 2) Heating the steel ingot to within the forging temperature range, elongating and rounding the steel ingot to Φ5; then elongating one end of the electroslag ingot or steel ingot until the total length of the steel ingot is L; the steel ingot is forged into an intermediate blank 4, and the intermediate blank 4 One sec...

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Abstract

The invention discloses a hot forging forming method for a cylindrical forged piece. According to the hot forging forming method, hot forging cracks generated in the forming process of the cylindrical forged piece are reduced, and the qualified rate of the cylindrical forged piece is improved; the hot forging forming method is suitable for long blind hole cylindrical forged pieces with thinner wall thicknesses. The hot forging forming method comprises the following steps: firstly, manufacturing a forming die according to the design size of the cylindrical forged piece to be manufactured; secondly, manufacturing an intermediate bank; thirdly, mounting the intermediate blank in the die; fourthly, downwardly pressing a punch by a pressing machine and performing impact extrusion on the intermediate blank. By adopting the hot forging forming method, hot forging cracks generated in the forming process of the cylindrical forged piece can be reduced, the qualified rate of the cylindrical forged piece is improved, the manufacturing period is shortened, and the production efficiency is improved. Besides, according to the hot forging forming method for the cylindrical forged piece, disclosed by the invention, stress conditions of the forging and forming process can be improved, the aims of greatly improving the finished product rate, the manufacturing efficiency and the qualified rate of the forged piece are achieved, and the manufacturing risk and the manufacturing cost are reduced. Meanwhile, the hot forging forming method is suitable for the long blind hole cylindrical forged pieces with the thinner wall thicknesses.

Description

technical field [0001] The invention relates to a forging method of a cylindrical forging in the forging industry, in particular to a hot forging forming method of a cylindrical forging. Background technique [0002] It is known that for some special materials, the special material refers to the material with strong hot cracking sensitivity and narrow forging temperature range, such as the retaining ring steel 1Mn18Cr18N. Due to the strong hot cracking sensitivity and narrow forging temperature range, it is often If the cracking is serious and the forging is stopped at any time, flame or gouging after cooling is used to clear the wound, resulting in many fires, long press time, low pass rate, low efficiency, and even scrapping midway due to severe cracking. Moreover, due to the characteristics of some materials, it is necessary to improve the grain size by forging. However, multiple fires, repeated forging stop and cleaning, and the reduction of deformation in the next proce...

Claims

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Application Information

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IPC IPC(8): B21J5/02B21J1/04B21J13/02B21K21/04
Inventor 程巩固孙海燕方鹏飞赵欣毛闯何文武
Owner CHINA ERZHONG GRP DEYANG HEAVY IND
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