Spin-forming method for long-barrel-shaped part board

A technology of spinning forming and tube parts, which is applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve problems such as difficulty in molding, low product qualification rate, and non-fitting of molds, so as to reduce manufacturing costs and simplify processes Process, the effect of improving the pass rate

Active Publication Date: 2016-06-29
JIANGXI HONGDU AVIATION IND GRP
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AI Technical Summary

Problems solved by technology

[0002] The aircraft equipment cabin is a typical thin-walled long cylindrical part, which belongs to the cylindrical part with a large length-to-diameter ratio (generally refers to 2

Method used

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Embodiment Construction

[0021] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with the examples.

[0022] A method for forming a long tube plate by spinning, the specific steps are as follows:

[0023] 1) Select raw materials. The raw material for manufacturing the equipment cabin is 2024 aluminum alloy sheet, and the length-to-diameter ratio of the equipment cabin is > 2, the typical wall thickness is 4mm, and the structure is of equal wall thickness;

[0024] 2) Calculate the parameters of the spinning circular plate. According to the principle of constant volume before and after the spinning part is formed, the selected raw materials are calculated according to the length, outer diameter, wall thickness and additional process allowance of the equipment cabin in step 1), and the spinning circular plate is calculated. Blank sheet diameter φ485mm, thic...

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Abstract

The invention discloses a spin-forming method for a long-barrel-shaped part board. The spin-forming method comprises the following steps: firstly, selecting raw materials, and selecting an equipment compartment manufacturing raw material which is a 2024 aluminum alloy board; then, calculating to obtain the diameter and the thickness of a spun circular plate blank sheet according to the length, the outer diameter and the wall thickness of an equipment compartment as well as adding process allowance by virtue of the principle that the volume before and after forming of a spun part is unchanged; determining processing precision and a bilateral jerk value of a spinning mould, and selecting parameters of a spinning machine; under a room-temperature condition, carrying out room-temperature spin-forming workpiece trial production on the spun circular plate blank, thereby obtaining spin-formed workpiece blank; and when the surface of the spin-formed workpiece blank has pits with different depths, changing room-temperature forming into heating spin-forming, heating the spinning mould to overcome material deformation resistance, thereby obtaining a spin-formed workpiece. Circular plate blank is adopted for forming a long-barrel-shaped part with a relatively great length-diameter ratio, so that use of extrusion-formed seamless metal tube blank is reduced, and therefore, the manufacturing cost is reduced, the technological process is simplified, and the qualified rate of parts is high.

Description

technical field [0001] The invention relates to the technical field of spinning of cylindrical parts, in particular to a method for spinning of long cylindrical parts. Background technique [0002] The aircraft equipment cabin is a typical thin-walled long cylindrical part, which belongs to the cylindrical part with a large length-to-diameter ratio (generally refers to 2<length-to-diameter ratio<10) that needs to be thinned strongly, especially the rear end surface has a large inclination angle and a length of 10mm. For the preparation of cylindrical parts on the inclined table, it is difficult to determine the gap between the blank and the mold. After the part is formed, it often does not fit the mold and the part is short of material. Therefore, repeated sample trial production is required to select this parameter, and the plate Under the extrusion of the rotary wheel, the blank flows and gradually thins and sticks to the mandrel, causing great difficulties; there ar...

Claims

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Application Information

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IPC IPC(8): B21D22/16B21D37/16
CPCB21D22/16B21D37/16
Inventor 洪厚全邓进万渠郝桂珍毛端华陈龙董浩威王韬
Owner JIANGXI HONGDU AVIATION IND GRP
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