Forming method for large high-modulus ellipsoidal molded surface hemispherical shell of aluminum alloy storage box

An aluminum alloy, high-modulus technology, applied in the field of tank forming, can solve the problems of increased cost, many processes, and reduced precision, and achieves the effects of saving energy, shortening the process flow, and improving the forming accuracy.

Inactive Publication Date: 2018-01-12
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, and to provide a method for forming a hemispherical shell of a l...

Method used

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  • Forming method for large high-modulus ellipsoidal molded surface hemispherical shell of aluminum alloy storage box
  • Forming method for large high-modulus ellipsoidal molded surface hemispherical shell of aluminum alloy storage box
  • Forming method for large high-modulus ellipsoidal molded surface hemispherical shell of aluminum alloy storage box

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Embodiment

[0090] A specific implementation case is given below. In this implementation case, the raw material of the hemispherical shell of the ellipsoidal surface storage tank is 2219 aluminum alloy, the modulus of the hemispherical shell is 2, the maximum inner diameter in the long axis direction is Ф1339~1340mm, and the wall thickness is The following is the specific process of integral precision forming:

[0091] (1) Manufacture the spinning mold. The spinning mold made is an ellipsoidal hemispherical shell + a straight line segment. The maximum diameters in the long axis direction and short axis direction are Φ1336mm and Φ664mm respectively. In addition, the spinning mold is hollow , A mold with a ribbed structure inside and a small end face with a flat bottom of Φ200-250mm outside, such as Figure 2a and Figure 2b shown.

[0092] (2) Prepare the spinning blank, calculate the specifications of the spinning blank by using the volume constant principle and cut an aluminum alloy d...

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Abstract

The invention relates to a forming method of a large high-modulus thin-wall ellipsoidal molded surface hemispherical shell of an aluminum alloy storage box for spaceflight and belongs to the technicalfield of storage box forming. A round plate blank is used for direct precise numerical-control spinning forming of the large high-modulus ellipsoidal molded surface hemispherical shell of the aluminum alloy storage box, and auxiliary working procedures such as pre-forming and intermediate heat-treatment are not needed; through the technical design and precise control, the combined technique of heat conventional spinning and then heat power spinning at the first stage and heat conventional spinning at the second stage is adopted, and the large high-modulus ellipsoidal molded surface hemispherical shell of the aluminum alloy storage box can be precisely formed only by using a spinning block, through clamping at a time and in one numerical-control program, so that the technical process is shortened, the production efficiency is improved, and the forming precision of a member can be greatly improved; and a unilateral gap between the inner molded surface of the formed ellipsoidal molded surface hemispherical shell and a theoretical molded surface template is smaller than 0.2 mm, and the wall thickness difference of the inner molded surface of the formed ellipsoidal molded surface hemispherical shell and the theoretical molded surface template is smaller than 0.2 mm.

Description

technical field [0001] The invention relates to a method for forming a hemispherical shell of a large-scale high-modulus thin-wall aluminum alloy tank with an ellipsoidal surface for aerospace, and belongs to the technical field of tank forming. The "large" in the large-scale high-modulus thin-walled ellipsoidal surface means that the maximum diameter of the ellipsoidal surface is not less than Φ1300mm; high modulus means that the ratio of the major axis to the minor axis of the ellipsoidal surface is not less than 2 , Thin-walled means that the wall thickness of the ellipsoidal surface is not greater than 5mm. Background technique [0002] For large-scale high modulus thin-walled ellipsoidal aluminum alloy storage tank hemispherical shells with inner diameter>Ф1300mm and wall thickness<5mm, it is difficult to directly form raw materials into target components, and the wall thickness accuracy is not easy to control; more reasonable forming The path is to first form th...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 温涛阴中炜微石张绪虎姚草根
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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