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Spinning forming method for large-diameter ratio thin-walled aluminum alloy special-shaped member

A technology of special-shaped components and large length-to-diameter ratio, which is applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of increased cost, many processes, and decreased precision, so as to improve production efficiency, shorten the process flow, and improve the forming process. The effect of precision

Active Publication Date: 2018-09-28
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 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 directly spinning the shell blank of a thin-walled aluminum alloy special-shaped member with a large length-to-diameter ratio from a plate, which can overcome the deficiencies of the prior art. More processes, increased cost and decreased accuracy

Method used

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  • Spinning forming method for large-diameter ratio thin-walled aluminum alloy special-shaped member
  • Spinning forming method for large-diameter ratio thin-walled aluminum alloy special-shaped member
  • Spinning forming method for large-diameter ratio thin-walled aluminum alloy special-shaped member

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Embodiment

[0098] A specific implementation case is given below. In this implementation case, the raw material of the housing is 5A06 aluminum alloy in the precision spinning forming method of the large-length-diameter ratio aluminum alloy special-shaped component shell, the length-diameter ratio is 1.8, and the maximum inner diameter of the hemispherical surface is Ф340 ~342mm, wall thickness is . The specific process of integral precision spinning is as follows:

[0099] (1) Manufacture the spinning mold. The surface of the spinning mold is a hemisphere + straight line segment, and its maximum diameter and total height are Φ336mm and 690mm respectively. In addition, the spinning mold is hollow, with a rib structure inside and an outside Molds with Φ60~80mm flat-bottomed small end faces, such as Figure 2a and Figure 2b shown.

[0100] (2) Prepare the spinning blank, calculate the specifications of the spinning blank by using the principle of volume invariance, and cut an aluminum...

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Abstract

The invention relates to a spinning forming method for a shell of a large-diameter ratio thin-walled aluminum alloy special-shaped member for aerospace, and belongs to the technical field of storage tank forming. A circular plate blank is adopted, precise numerical control spinning forming of the shell of the large-diameter ratio thin-walled aluminum alloy special-shaped member is directly carriedout, and auxiliary processes such as pre-forming and intermediate heat treatment are not required; and through process design and precise control, a spinning path is adopted, specifically, firstly, 11-times (hot strong spinning-hot normal spinning) forming is alternately performed in a circulating mode, and then finishing is carried out through one-time hot strong spinning. Only one set of spinning dies is needed, one-time loading clamping is needed, precise spinning forming of the shell of the large-diameter ratio thin-walled aluminum alloy special-shaped member can be achieved in one numerical control program, the process flow is shortened, the production efficiency is improved, the forming precision of the member can be greatly improved, the unilateral clearance between the inner profile of the shell of the formed special-shaped member and the theoretical profile template is less than 0.1mm, and the wall thickness difference is less than 0.2mm.

Description

technical field [0001] The invention relates to a spinning forming method of a thin-walled aluminum alloy special-shaped component with a large length-to-diameter ratio for aerospace, and belongs to the technical field of tank forming. The "large aspect ratio" in the thin-walled aluminum alloy special-shaped component with a large aspect ratio refers to the ratio of the total height of the component blank to its maximum diameter not less than 1.8; the "special-shaped component" refers to the profile of the component The number of profile categories is not less than 2. For example, the profile of a component includes a circular arc profile and a straight tube profile. Thin-walled means that the wall thickness of a component is not greater than 2mm. Background technique [0002] For thin-walled aluminum alloy special-shaped components with a large aspect ratio ≥ 1.5 and a wall thickness ≤ 2 mm, the following two methods are generally used for forming: Option 1 is to use multip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/16B21D37/16
CPCB21D22/16B21D37/16
Inventor 温涛阴中炜沈正章张绪虎赵磊尹嘉明张亚莲
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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