Modular metal constructing forming method

A modular, metal technology, applied in the direction of metal rolling, metal processing equipment, electron beam welding equipment, etc., can solve the problems of overall billet scrapping, high equipment requirements, and difficult forming, so as to achieve reliable quality, reduce production costs, Improve the effect of tensile stress state

Inactive Publication Date: 2018-02-23
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for large forgings (especially more than 100 tons), it is extremely difficult to build and form at one time, and the requirements for equ

Method used

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Examples

Experimental program
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Example Embodiment

[0026] Step (2) Preparation of multi-level modules,

[0027] (2-1) First, the preforms are welded together in the vacuum chamber to make 2 N-1 Class I modules,

[0028] (2-2) Then by heating the I-level module, upsetting and deformation in the height direction and heat preservation between forgings are carried out to form an intermediate blank.

[0029] (2-3) Next, the intermediate blank is welded two by two in the vacuum chamber to make 2 N-2 Two level II modules, after heating level II modules, implement upsetting and deformation along the height direction and heat preservation between forgings. Depending on the number of preforms, this step may be repeated multiple times;

[0030] Step (3) The intermediate blank is made into a blank;

[0031] Step (4) process the blank into parts or parts.

[0032] In the present invention, the I-level module made from the prefabricated blank and the II-level module or multi-level module made from the intermediate blank are all hourglass-shaped module...

Example Embodiment

[0037] Example 1

[0038] The target product of this embodiment is a large annular forging.

[0039] In the first step, the steel ingot is obtained by pouring, the steel ingot is heated and billet forging to form a preform. The dimensions of the preform are: diameter 2100mm, height 1500mm, see figure 2 (a).

[0040] The second step is to heat the preform before forging, and the maximum heating temperature is not less than 1200°C. Die forging the preform to form a Class I frustum shape unit, see figure 2 (b).

[0041] The third step is to perform vacuum electron beam welding on the I-level frustum shape unit. In the vacuum chamber, vacuum electron beam sealing welding is performed on the stacked I-level frustum-shaped unit blanks, and the welding depth is 20-50mm to form I-level hourglass-shaped modules, see figure 2 (c).

[0042] The fourth step is to heat the welded I-level hourglass module before forging, and the maximum heating temperature is not less than 1200°C. Place the hea...

Example Embodiment

[0048] Example 2

[0049] The target product of this embodiment is a large tube blank.

[0050] In the first step, the stainless steel continuous casting slab made by continuous casting is cut into 11 blanks with a size of 1500mm×1500mm×200mm. The 6 faces of each continuous casting billet are machined and the surface to be welded is cleaned to expose the fresh metal surface.

[0051] In the second step, vacuum electron beam welding is performed on the blank. In the vacuum chamber, vacuum electron beam welding is performed around the stacked blanks, the welding depth is 20-50mm, and the dimensions after welding are: width 1500mm, length 1500mm, height 2200mm, see image 3 (a).

[0052] The third step is to heat the welded billet before forging. The maximum heating temperature is not less than 1200°C, and the heating rate is required to be less than 100°C / h. Place the heated billet on the operating table of the press so that the height of the billet is in the vertical direction. Alo...

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Abstract

The invention relates to a modular metal constructing forming method. According to the method, a large forging preformed blank is divided into multistage modules to be constructed correspondingly according to concrete conditions, finally, the blank is formed, and parts or components are machined. The constructing quality of the method is more reliable and controllable, each module can be detectedafter being forged, and it is ensured that the modules are recycled after qualification; multiple pieces can be fed during feeding, the project duration can be effectively guaranteed. The method can improve the yield of large metal constructing forming, can greatly improve the production efficiency under the condition of using the same specification press, solves the bottleneck problem in the manufacturing process of large constructed formed forgings, and reduces the production cost.

Description

technical field [0001] The invention relates to a method for manufacturing metal materials, in particular to a method for forming modular metal structures. Background technique [0002] When preparing large-scale metal materials or composite metal materials, the existing methods propose to use casting slabs, forging slabs, and rolling slabs as primitives. After surface processing and cleaning, multiple primitives are packaged together, and the interior of the interface is kept high. Vacuum state, and then apply the forging and welding process characterized by upsetting deformation, heat preservation between forgings, and multi-directional forging, and finally prepare large metal devices. For example, Chinese patent application 201511026272.X "Method for forming homogeneous metal structures", 201511027492.4 "Method for forming metal structures", and 201511027686.4 "Method for forming cylindrical metal structures", all of which use one-time forming methods to manufacture metal...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00B21H1/06B21J5/08B21J1/04B21J1/02B23P2700/12B23K20/023B23K15/06B21J5/12B21J1/06B21K1/761B23P13/00
Inventor 燕春光徐海涛刘强李雅平孙刚刘兆阳王明政杨孔雳
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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