Method for determining blanks of different thickness for local loading forming of three-dimensional frame-shaped member

A local loading and billet technology, applied in the field of thick billets, can solve the problems of high cost, failure to consider the local loading characteristics of the mold partition, and the area cannot be filled, etc.

Inactive Publication Date: 2012-07-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0018] In order to overcome the problems existing in the prior art that some areas cannot be filled, or the local loading characteristics of the mold partitions are not consid

Method used

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  • Method for determining blanks of different thickness for local loading forming of three-dimensional frame-shaped member
  • Method for determining blanks of different thickness for local loading forming of three-dimensional frame-shaped member
  • Method for determining blanks of different thickness for local loading forming of three-dimensional frame-shaped member

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Embodiment Construction

[0118] This embodiment is a method for determining a three-dimensional frame-shaped component with unequal thickness blanks for local loading and forming. The component in this embodiment is a frame-shaped component 6, such as Figure 4b As shown, the upper surface and the lower surface have ribs distributed symmetrically; the upper mold is divided into two pieces, and the center of the partition rib 8 is the mold partition position; the material of the component is TA15 titanium alloy. The forming process in this embodiment has two loading steps.

[0119] In this embodiment, the isothermal forming process is adopted for the local loading forming of the three-dimensional frame-shaped member, the forming temperature is 970°C, the loading speed of the upper die is 0.2 mm / s, and the friction factor m is taken as 0.3.

[0120] The shape of the component in this embodiment is divided into two sections: one section is located at one end of the component, one side surface of this sec...

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Abstract

Disclosed is a method for determining blanks of different thickness for local loading forming of a three-dimensional frame-shaped member. The method includes steps of determining a calculating formula for sizes of inflow ribbed cavity materials according to various loading states in a forming process to realize fast analysis of a simplified interface and shortening time for determining blank shapes, and modifying blank shapes according to numerical simulation results, and determining the blanks of different thickness which meet the filling demands so as to reduce cost. By the method, the determined size distribution of the blanks of different thickness is reasonable, the flaws such as insufficient filling, folding and the like in the forming process are eliminated, machining allowance and forming load are reduced, and the blanking is easy due to the simple blank shapes.

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 local loading and forming of frame-shaped three-dimensional components. technical background [0002] The use of high-performance lightweight alloy materials, such as titanium alloys, and lightweight structures, such as thin-walled, integral, and ribbed structures, is an effective technical way to improve the performance and reliability of parts and realize lightweight equipment. The large-scale rib-plate 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] Such large and complex components are not only difficult to deform, but also complex in structure and large in projected area. Usi...

Claims

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Application Information

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IPC IPC(8): B21J5/00
Inventor 杨合张大伟樊晓光
Owner NORTHWESTERN POLYTECHNICAL UNIV
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