2195 aluminum-lithium alloy special-shaped section structure and spinning method thereof

A special-shaped cross-section, aluminum-lithium alloy technology, applied in the field of aerospace parts, can solve problems such as easy stacking, spinning resistance fracture, and high material extension resistance, so as to save mold manufacturing costs, reduce the risk of scrapping, and shorten the product processing cycle Effect

Active Publication Date: 2021-01-22
TIANJIN AEROSPACE CHANGZHENG ROCKET MFGCO
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Problems solved by technology

However, in view of the special-shaped structural features, material accumulation is very likely to occur at the junction of the flange and the cone wall, and the extension resistance of the material at the local convex hole feature is relatively large, and the spinning resistance can easily lead to fracture problems

Method used

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  • 2195 aluminum-lithium alloy special-shaped section structure and spinning method thereof

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Embodiment Construction

[0036] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention Creation and simplification of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should no...

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Abstract

The invention provides a 2195 aluminum-lithium alloy special-shaped section structure and a spinning method thereof. The special-shaped section structure is characterized in that a curved surface flanging structure is arranged in the center area of a spatial smooth profile, the flanging profile is of a curve fitting structure, the top diameter is 240 mm, and the profile precision requirement is high. The deformation amount of each pass is controlled to be in a range of 10.5-15.5% through circulating hot strong spinning forming, quenching, shape correcting, machining and artificial aging, gradient decreasing is achieved, the rotating speed of a main shaft is 25 rpm/min, and hot spinning machining integrated forming of the 2195 aluminum-lithium material special-shaped structure is achieved.The two-pass forming scheme that according to traditional forming of the special-shaped structure, a rigid die is adopted to draw a smooth molded surface firstly, and then local flanging is conductedto form the special-shaped structure is broken through, the scrap risk caused by cracks occurring in the rigid die drawing and flanging process is obviously reduced, a hot spinning integrated formingthought is created, forming of the new material special-shaped structure is realized, and a foundation is laid for new material engineering application.

Description

technical field [0001] The invention belongs to the field of aerospace parts, and in particular relates to a 2195 aluminum-lithium alloy special-shaped cross-section structure and a spinning method thereof. Background technique [0002] With the advancement of the aerospace industry, new rockets are developing in the direction of lightweight and high performance. In order to effectively reduce the structural mass and significantly increase the payload, new requirements are put forward for material performance and key structural reliability. As a new type of alloy, 2195 Al-Li alloy has the characteristics of low density, high strength, high specific modulus, good corrosion resistance and low temperature performance. It is considered as one of the ideal structural materials and has broad prospects in the aerospace field. Many key components of the rocket fuel storage tank are large-scale thin-walled complex structures, which are a special-shaped cross-section structure of 2195...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21D22/16C22F1/04C21D9/00
CPCB23P15/00B21D22/16C22F1/002C22F1/04C21D9/0068
Inventor 田恕李继光张杰刚杜正勇冯叶素穆菁毕海娟张下陆杨菊鹏胡正根巴忠辉冯运华
Owner TIANJIN AEROSPACE CHANGZHENG ROCKET MFGCO
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