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Large crankshaft mold with coupled biomimetic surfaces

A mold and crankshaft technology, which is applied in the field of large crankshaft die forging molds, can solve the problems that the service life of the mold cannot be significantly improved, and achieve the effects of easy automatic production, convenient and flexible processing, and increased hardness

Active Publication Date: 2021-04-30
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the current treatment method cannot significantly improve the service life of the mold

Method used

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  • Large crankshaft mold with coupled biomimetic surfaces
  • Large crankshaft mold with coupled biomimetic surfaces
  • Large crankshaft mold with coupled biomimetic surfaces

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Embodiment example

[0026] Such as figure 1 As shown, with reference to the wear condition of the scrapped large crankshaft mold, the present invention adopts a block strengthening method according to the wear appearance and furrow depth combined with the computer finite element analysis results of the force on the mold surface. The working surface of the large crankshaft mold is divided into three regions according to the force, damage mode and wear morphology. The convex part of the mold cavity with wear patterns such as furrows on the working surface is area A, the concave part of the cavity with less wear but more thermal fatigue lines is area B, and the upper and lower molds with fatigue lines and shallow furrows The contact surface of mold clamping is area C; different coupling bionic models are prepared in the three areas.

[0027] Aiming at the working surface of area A with greater wear, a unit body model with densely packed thick stripes was prepared. Such as Figure 2a , Figure 2b...

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Abstract

The invention relates to a large-scale crankshaft mold with a coupled bionic surface. The working surface of the mold is divided into three regions according to the force, destruction mode and wear appearance according to the wear condition of the scrapped mold: the convex part in the mold cavity is A area, the concave part of the mold cavity is area B, and the contact surface of the upper and lower molds is area C; area A is prepared with densely packed thick-striped unit models, which can effectively slow down wear; area B is prepared with sparse thin-striped unit models, It can effectively hinder the development of fatigue cracks and slow down wear; uniformly arranged grid-like unit models are prepared in area C to enhance the strength of the circular arc transition joints of the mold, which can effectively slow down wear. The invention can significantly improve the hardness, wear resistance and thermal crack development resistance of the working surface of the mold.

Description

technical field [0001] The invention belongs to the technical field of metal material surface strengthening, and relates to a large crankshaft die forging die with coupled bionic surface strengthening. Background technique [0002] During the forging process of a large crankshaft, the mold needs to withstand huge impact pressure. The surface shape of the mold cavity is complex and the depth is different, so that the force on the surface of each cavity is uneven. When the hot metal enters the mold cavity, the surface of the mold cavity heats up rapidly, which is equivalent to tempering treatment, and the flowing billet will scour, squeeze and rub the mold cavity, softening the mold and increasing wear. In this process, not only the surface roughness of the mold is destroyed, resulting in deviation of the forging, but also groove marks on the surface of the mold. In addition, during the repeated forging process, the mold is subjected to cyclic thermal stress and wear, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J13/02B21K1/08
CPCB21J13/02B21K1/08
Inventor 支本丰周宏李静平周倜张凯迅
Owner JILIN UNIV