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Method for determining blank with different thicknesses for two-dimensional integrated loading and forming

A billet, unequal technology, applied in the field of hot forging of hard-to-deform alloys, which can solve the problems of high cost, failure to consider local loading characteristics, and inability to fill the area.

Inactive Publication Date: 2013-11-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to overcome the problems existing in the prior art that some areas cannot be filled, or the local loading characteristics in the overall forming are not considered, or the high cost is high, the present invention proposes a method for determining the unequal-thickness blanks for two-dimensional overall loading forming. method

Method used

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  • Method for determining blank with different thicknesses for two-dimensional integrated loading and forming
  • Method for determining blank with different thicknesses for two-dimensional integrated loading and forming
  • Method for determining blank with different thicknesses for two-dimensional integrated loading and forming

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Embodiment 1

[0107] This embodiment is a method for determining blanks of unequal thickness for overall loading and forming of ribbed members.

[0108] Such as Figure 4 As shown, the lower surface of the forming member in this embodiment has six ribs, and two of the ribs are respectively located at both ends of the member. The ribs at both ends of the component have different widths. Starting from the end of the rib having the wide end surface, each rib is sequentially referred to as the first rib to the sixth rib. The material of the component is Ti-6A1-4V titanium alloy. The forming process in this embodiment has a loading step in total.

[0109] In this embodiment, the overall loading and forming of ribs and plates adopts the isothermal forming process, the forming temperature is 950C, the loading speed of the upper die is 1 mm / s, and the friction factor m is taken as 0.3.

[0110] The specific process of determining the shape of the blank with different thickness is as follows:

...

Embodiment 2

[0184] This embodiment is a method for determining blanks of unequal thickness for overall loading and forming of rib-like members, such as Figure 8 As shown, there are three ribs on the upper surface and the lower surface of the component in this embodiment; the ribs on the upper surface and the lower surface of the component are distributed symmetrically. And a pair of ribs are located at the ends of a pair of members. The material of the components is 7075 aluminum alloy. The forming process in this embodiment has a loading step in total.

[0185] In this embodiment, the integral loading and forming of ribs and plates adopts the hot die forging process, the blank temperature is 450°C, the mold temperature is 400°C, the loading speed of the upper die is 10mm / s, and the friction factor m is taken as 0.3.

[0186] The specific process of determining the shape of the blank with different thickness is as follows:

[0187] Step 1, simplify the cross-sectional shape of the mem...

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Abstract

The invention discloses a method for determining a blank with different thicknesses for two-dimensional integrated loading and forming. The method comprises the following steps of: quickly forecasting material flowability and cavity filling of a multi-rib structural member during two-dimensional forming based on partial loading characteristics according to a resolving analysis calculation formula; quickly determining the shape of the blank with different thicknesses of a two-dimensional base body by quickly analyzing the material flowability and the cavity filling on a cross section; performing value simulation; modifying the shape of the blank with different thicknesses according to a value simulation result by considering the partial loading flow characteristics; and obtaining the final shape of the blank with different thicknesses by adjusting and modifying for zero or a plurality of times. According to the determined blank with different thicknesses, the problem that the cavity cannot be filled fully during forming can be solved completely, and the optimized design time is shortened. The determined of the blank with different thicknesses is distributed rationally; shortcomings that the cavity cannot be filled fully, the blank is folded and the like during forming are overcome; the machining allowance and the forming load are reduced; the shape of the blank is simple; and the blank is easy to make.

Description

technical field [0001] The invention relates to hot-working forging of hard-to-deform alloys in the field of hot-working, in particular to a method for determining blanks of unequal thickness for two-dimensional overall loading and forming. technical background [0002] The use of high-performance lightweight alloy materials, such as aluminum alloys and titanium alloys, and the use of lightweight structures, such as thin-walled, integral, and ribbed structures, are effective technical ways to improve the performance and reliability of parts and achieve lightweight equipment . The ribbed integral member with high-reinforcement and thin-web structure effectively improves structural efficiency, reduces equipment weight and has excellent service performance. It is an important lightweight load-bearing member in aerospace vehicles. [0003] Generally, in order to reduce unwanted material flow, the shape of the blank in horizontal projection should be close to that of the forging...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J1/00B21J5/02
Inventor 杨合张大伟樊晓光
Owner NORTHWESTERN POLYTECHNICAL UNIV