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A Method for Determining the Shape and Dimensions of Variable-thickness Slabs for Bulkhead Forgings

A technology of variable thickness and forging, applied in metal processing equipment and other directions, can solve the problems of inability to achieve accurate and reasonable distribution of slabs, metal transverse rib flow, product quality cannot be guaranteed, etc., to eliminate the phenomenon of rib flow and reduce forging. The effect of the margin and the elimination of the outcropping of the streamline

Active Publication Date: 2016-08-24
山西管家营法兰锻造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is impossible to accurately and rationally distribute the volume of each part of the slab according to the structural size of the die forging of the bulkhead, so that the slab is prone to filling and dissatisfaction defects during the open die forging forming process; the metal at the web is also prone to transverse flow through the ribs, or Defects such as turbulence and folding occur, and the product quality cannot be guaranteed

Method used

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  • A Method for Determining the Shape and Dimensions of Variable-thickness Slabs for Bulkhead Forgings
  • A Method for Determining the Shape and Dimensions of Variable-thickness Slabs for Bulkhead Forgings
  • A Method for Determining the Shape and Dimensions of Variable-thickness Slabs for Bulkhead Forgings

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Experimental program
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Embodiment 1

[0045] For the definition of web 101, peripheral rib 102 and middle rib 103 in the bulkhead forging described in the present invention, see pages 79 and 786 of Forging Technology Manual (Volume 1), National Defense Industry Press (first edition in 1989).

[0046] In this embodiment, the following steps are followed in order to accurately determine the shape and size of the variable-thickness slab for the bulkhead forging:

[0047]1) The bulkhead forging piece 107 is 650mm long and 490mm wide. It is a double-sided symmetrical rib structure, with 5 ribs interlaced in the vertical and horizontal directions. The rib width is 10mm, and the rib height on one side is 30mm. degree, the thickness of the web 101 is 15mm, and the total area of ​​its plan view is 318480mm 2 . Use the modeling software UG to draw the three-dimensional modeling of the frame forging part 107, as shown in the attached figure 2 shown.

[0048] 2), use the computer drawing software CAXA electronic drawing b...

Embodiment 2

[0069] For the definition of web 101, peripheral rib 102 and middle rib 103 in the bulkhead forging described in the present invention, see pages 79 and 786 of Forging Technology Manual (Volume 1), National Defense Industry Press (first edition in 1989).

[0070] In this embodiment, the following steps are followed in order to accurately determine the shape and size of the variable-thickness slab for the bulkhead forging:

[0071] 1) The frame forging part 2 109 is 555mm long and 150-400mm wide. It is a double-sided symmetrical rib structure. There are 5 vertical ribs and 3 horizontal ribs interlaced with each other. The rib width is 10mm. The height of the rib 102 is 30mm, the height of the single lateral middle rib 103 is 26mm, there is no forging slope, the thickness of the web 101 is 15mm, and the total area of ​​the plan view is 134006mm 2 . Use the modeling software UG to draw the three-dimensional modeling of the frame forging part 2 109, as shown in the attached Fig...

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Abstract

The invention provides a method for determining the shape and dimension of a bulkhead forging thickness-variable slab, and belongs to the technical field of forging forming in the aerospace industries. The method is characterized in that the method includes the following steps that 1, three-dimensional modeling is conducted on a bulkhead forging according to the required dimension; 2, a plane graph of the bulkhead forging is drawn; 3, defined by unit, the bulkhead forging is divided into units and numbered; 4, the plane graph area and the ideal thickness of all the units of the slab are determined; 5, the ideal shape and dimension, determined in step 4, of the thickness-variable slab are simplified; 6, correction is conducted on steps formed on junctions of different thicknesses and obtained after simplifying is conducted through a transition slope, and the shape and dimension of the thickness-variable slab are determined finally. By means of the method, the requirements for reasonable distribution of the volume in the closed die forging forming process slab design of the bulkhead forging can be met, the defects of crossflow, turbulent flow, folding and the like are overcome effectively, product quality is improved, and the requirement for precise forming of the partition frame forging is met; meanwhile the material utilization rate is increased, and the production cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of forging forming in the aerospace industry, in particular to the technical field of determining the shape and size of a slab formed by closed precision die forging for a bulkhead forging. Background technique [0002] Bulkhead die forgings are load-bearing structural parts widely used in aerospace vehicles. They are made of high-performance lightweight alloy materials (such as aluminum alloys and titanium alloys). They are mainly composed of ribs and webs. They are usually open Die forging process, hot die forging on large-scale die forging hydraulic press. The open die forging has a large allowance, has a flash structure, low material utilization rate, and high production cost. Moreover, in the open die forging process, the design of the preform is first calculated to obtain a slab of equal thickness according to the principle of constant volume, and then roughly redistribute the volume according to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/02
Inventor 陈慧琴刘嘉辰刘岩赵晓东刘建生
Owner 山西管家营法兰锻造股份有限公司
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