Multi-coating structure of 3D welding material printing mold and coating thickness determining method

A cladding and welding material technology, used in the manufacture of tools, forging/pressing/hammer devices, forging/pressing/hammering machines, etc., to achieve long service life, reduce deformation, and improve service life.

Pending Publication Date: 2018-10-02
HUBEI TRI RING FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, only one material is generally used in the mold cavity, mainly to increase the fatigue resistance, but how to absorb the huge impact force dur

Method used

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  • Multi-coating structure of 3D welding material printing mold and coating thickness determining method
  • Multi-coating structure of 3D welding material printing mold and coating thickness determining method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example one.

[0025] Such as figure 1 As shown, the multilayer coating structure of a 3D welding material printing mold of this embodiment is provided with tightly joined three-layer coatings in the forging mold cavity. The three-layer coatings are the surface layer, the middle layer, and the bottom layer in order from the outside to the inside. The outer surface of the surface layer is the same as the forging cavity, and the inner surface of the three-layer cladding is the profiling curved surface of the forging cavity, and the hardness and elastic modulus of the three-layer cladding decrease from the outside to the inside. The cladding structure set in the mold cavity of the present invention conforms to the mold cavity, thereby forming a hardness gradient from the cladding to the mold, and the hardness of the cladding (especially the surface layer) is higher, thereby improving the fatigue resistance of the cavity surface Secondly, the structure of the multi-layer coati...

Example Embodiment

[0028] Example two.

[0029] Compared with the first embodiment, this embodiment provides a simplified design of the multilayer coating structure of the 3D welding material printing mold, that is, the three-layer coating structure adopts a simple mathematical ratio, and the thickness of the surface layer is the total thickness of the three-layer coating The thickness of the middle layer is 30% of the total thickness of the three-layer cladding, and the thickness of the bottom layer is 50% of the total thickness of the three-layer cladding. This solution is a simplified process and can obtain a better one than the prior art. Kind of implementation, but not the best implementation.

Example Embodiment

[0030] Example three.

[0031] This embodiment provides a method for determining the coating thickness of the multilayer coating structure of a 3D welding material printing mold. The method is as follows: establish a spatial coordinate system, perform finite element analysis to simulate the forging process, and obtain the forging force F(t ) Curve with time, such as figure 2 As shown, the figure includes the billet making stage and the final forging stage. The dies used in the two stages are different. The design method of the present invention is aimed at the final forging stage (the pre-forging stage can also be used for the pre-forging stage).

[0032] During the forging process, t 1 The metal begins to deform to t 2 It is the first stage when the metal is basically filled with the cavity, t 2 Time to t 3 The second stage when the metal is completely filled with the cavity, t 3 Time to t 4 The end of forging is the third stage, the surface of the cavity is Σ 1 :z 1 =f 1 (x,y), ...

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Abstract

The invention relates to the technical field of mold processing, in particular to a multi-coating structure of a 3D welding material printing mold and a coating thickness determining method. Three coatings tightly connected in a welded mode are arranged in a mold-forging cavity and are the surface coating, the middle coating and the bottom coating sequentially from outside to inside, the surface coating shares the same outer surface with the mold-forging cavity, the inner surfaces of the three coatings are profiled curved faces of the mold-forging cavity, and the three coatings from outside toinside are sequentially reduced in hardness and elasticity modulus. By means of the technical scheme, the coatings (particularly the surface coating) have higher hardness, so that the endurance of the surface of a mold cavity is improved; secondly, due to the multi-coating structure, the forging impact absorption capacity of the mold is improved by aid of the middle coating and the bottom coating, the service life of the mold is prolonged accordingly, and the deformation amount of the mold after repeated usage is reduced; and the influences of different forging processes on the coatings are taken into consideration in the design method, the thickness of each coating can be easily determined, the specific structure of the coatings is obtained accordingly, and the multi-coating structure has a longer service life.

Description

technical field [0001] The invention relates to the technical field of mold processing, in particular to a multi-layer cladding structure of a 3D welding material printing mold and a method for determining the thickness of the cladding. Background technique [0002] Forging is one of the commonly used technologies in the production of mechanical products. The mold used in forging is the key to product forming. Due to the repeated strong forging of the mold during forging, after a certain period of time, the mold cavity will have different geometric dimensions. Cracks develop in some places and need to be repaired. In order to improve the service life of the forging die, in the prior art, when making and repairing the die, special metals are used in the die cavity by additive welding or surface treatment is carried out, thereby increasing its fatigue resistance. [0003] In the prior art, only one material is generally used in the mold cavity, mainly to increase the fatigue ...

Claims

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Application Information

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IPC IPC(8): B21J13/02B23P6/00
CPCB21J13/02B23P6/00
Inventor 张运军陈天赋杨杰晏洋李生仕余国林周明张鹏吴冬波张君妮
Owner HUBEI TRI RING FORGING
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