Blank pre-upsetting forming die and method

A technology for forming molds and blanks, which is applied in the field of blank pre-upsetting forming molds and forming, can solve the problems of uneven deformation of cylindrical blanks, easy to appear bulging, etc., and achieve uniform deformation, small flow obstruction, and small contact area.

Inactive Publication Date: 2015-03-04
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to provide a high-diameter ratio billet pre-upsetting forming die and method, which solves the problem of uneven deformation and prone to drum shape of the cylindrical billet in the existing upsetting technology

Method used

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  • Blank pre-upsetting forming die and method

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Embodiment

[0044] Embodiment: billet pre-upsetting forming die and method

[0045] Figure 1~3 Shows the structure of the billet pre-upsetting forming die. The forming die includes an upper template 1 and a lower template 2. The upper template 1 and the lower template 2 can be buckled together. When the parting contact surfaces of the upper template 1 and the lower template 2 are completely attached The cavity is formed inside, and the length of the upper template 1 and the lower template 2 along the central axis direction is 160mm; the inner cavity includes three chambers: elliptical frustum cavity I3, fixed cavity 4, elliptical truncated cone cavity Cavity II5; the length of the central axis of the fixed cavity is 115 mm, the fixed cavity 4 is located between the elliptical frustum cavity I3 and the elliptical frustum cavity II5, and the elliptical frustum cavity I3 and the elliptical frustum cavity II5 are distributed On both sides, it is symmetrically distributed; the cross-sectiona...

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Abstract

The invention discloses a blank pre-upsetting forming die and a blank pre-upsetting forming method, and belongs to the technical field of material forging. The blank pre-upsetting forming die is firstly designed, a cylindrical blank with a high height-diameter ratio is changed into a blank of which the two ends are frustum-shaped and which is low in height-diameter ratio, and a flat anvil upsetting technology is carried out. For an original blank with a high height-diameter ratio, the original blank is pre-upset by adopting the method in the upsetting forming process to form a cylindrical structure of which the two ends are frustum-shaped; as a contact area between the blank and the die is small, the die slightly hinders the flow of metal on the end part of the blank, and a hard deformation area does not exist, the blank difficultly forms a drum type in the later upsetting process, the deformation is uniform, and the upsetting effect is good. The invention provides a good preprocessing method for upsetting and forming the cylindrical blank with the high height-diameter ratio.

Description

technical field [0001] The invention belongs to the technical field of material forging, and in particular relates to a billet pre-upsetting forming die and a forming method. Background technique [0002] Upsetting is one of the basic processes of free forging, and it is also an essential step in the processing of most forgings. Upsetting can destroy the as-cast dendritic structure, refine the grains of the internal structure of the forging, increase the strength of the material, improve the toughness of the forging and the ability to resist damage, and plays a vital role in the free forging process. [0003] During the upsetting process, due to the friction between the tool and the cylindrical blank, the deformation is not simultaneous and uneven. As a result, the upsetting blank is prone to bulging, or even a double drum shape. The aspect ratio of upsetting blanks generally does not exceed 2.5. In order to reduce the side drum shape of the upsetting blank, the friction c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J13/02B21J5/08B21J5/02
CPCB21J1/06B21J5/02B21J5/08B21J13/02
Inventor 汪程鹏李克伟杨琳池成忠
Owner TAIYUAN UNIV OF TECH
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