Multi-pass inverse curve track spinning forming method for aluminum alloy plate
An aluminum alloy plate, spinning forming technology, applied in the field of manufacturing, can solve the problems of increasing spinning process, unfavorable engineering application, cycle and cost increase, etc., to achieve the effect of meeting the preparation requirements
Pending Publication Date: 2022-03-08
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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Problems solved by technology
However, this process increases the spinning process, which greatly increases the cycle and cost, which is not conducive to engineering applications
Method used
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[0047] The present invention will be further described below in conjunction with drawings and embodiments.
[0048] Example
[0049] Adopt the method of the present invention, manufacture such as Figure 2(a) ~ Figure 2(c) As shown, the radius of the ball in Figure 2(a) is 500mm, there is a margin of 60mm at the upper end, the diameter is φ1000mm, and the wall thickness partial The base is a disk with a diameter of The non-welded hemispherical shell, the specific steps are as follows:
[0050] (1) Calculation of billet specifications: The machining allowance of the inner and outer surface of the spinning part is designed to be 4mm, and then according to the machining allowance, the wall thickness required for the thinnest part of the spinning part is determined to be 11.5mm, and then according to the law of constant volume of the blank before and after spinning , Determine the blank size specification δ20mm×φ1320mm.
[0051] (2) Cutting: According to the determined bla...
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Abstract
The invention belongs to the technical field of advanced manufacturing, and provides a multi-pass reverse curve track spinning forming method for an aluminum alloy plate, which comprises the following steps of: firstly, performing spinning according to a composite curve track, and continuously performing bending spinning according to a reverse arc curve track after preset 2-4 passes of spinning until a round blank is completely attached to a die and is formed into a spinning part; the composite curve track spinning mode comprises the steps that firstly, stretching common spinning is conducted on a clamped round plate blank through a positive curve track, the round plate blank is divided into a film pasting part and a film non-pasting part, and when a spinning roller conducts spinning to the 1 / 2-2 / 3 position of the section line of the film non-pasting part of the round blank, bending spinning is conducted through a reverse arc curve track; according to the method, the problems that the blank is prone to instability, large in thinning amount, thin in wall and insufficient in follow-up machining allowance during multi-pass common spinning forming (stretching common spinning) of the large-specification plate blank are solved, and the qualified spinning part which has enough machining allowance and can be subjected to follow-up finish machining of the product is prepared.
Description
technical field [0001] The invention relates to a method for forming a hemispherical shell by spinning an aluminum alloy plate with a multi-pass anti-curve track, which belongs to the field of manufacturing technology, and is mainly used for spinning and forming a large-sized aluminum thick plate to prepare an aluminum alloy hemispherical shell. Background technique [0002] At present, many models of products in my country use large-size aluminum alloy shell components. The traditional preparation process generally uses pressed melon petals, then welded, and then machined. The weld seam is the weak link of the shell, which deteriorates the product's carrying capacity and service level to a certain extent, so reducing the number of weld seams can significantly improve the reliability of the product. [0003] At present, in addition to using the melon petal forming method in the manufacture of super-large-diameter propellant tanks (such as space shuttle external tanks, Ares-V...
Claims
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IPC IPC(8): B21D22/16C21D1/26
CPCB21D22/16C21D1/26
Inventor 李启军张亚莲黄啸辰韩冬峰沈正章马鹏程常若寒涂罡及可然赵世强
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH