Manufacturing method of plane wing-body fairing

A manufacturing method and fairing technology, which are applied in the field of aircraft wing body fairing production, can solve the problems of difficult adjustment of design results, difficult to guarantee the surface quality, difficult to control the lofting law, etc., and achieve simple and convenient modification, good surface quality and design Efficient effect

Inactive Publication Date: 2012-07-18
COMAC +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, spline curves are generally used in the shape design of fairings at present. The disadvantages are: (1) spline curves are difficult to design; (2) design results are difficult to adjust; (3) surface quality is difficult to guarantee; 4) lofting law is difficult to control

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  • Manufacturing method of plane wing-body fairing
  • Manufacturing method of plane wing-body fairing
  • Manufacturing method of plane wing-body fairing

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Embodiment Construction

[0046] Hereinafter, a description of preferred embodiments of the present invention will be provided in detail with reference to the accompanying drawings.

[0047] figure 1 Be according to the schematic diagram of the manufacture method of aircraft wing-body fairing of the present invention, wherein, 1 1 -l 4 The four vertical solid lines are the guide lines, the dashed lines are the tangent vectors at both ends of the quadratic curve, and the surface s is the lower boundary l 1 The stretched surface along the direction of the symmetry plane controls the tangent direction of the lower boundary during the sweeping process, and the dotted line controls the sweeping direction.

[0048] Figure 2a-2d A schematic diagram showing the principle of the method for determining the quadratic curve of the present invention. Conic algebraic expression: Ax 2 +Bxy+Cy 2 +Dx+Ey+F. =0 The geometric diagram of the quadratic curve is as follows Figure 2a As shown, among them, the quadr...

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Abstract

The invention provides a manufacturing method of a plane wing-body fairing, comprising the steps of taking two, three or four quadratic curves as guide curves, wherein one guide curve is a lower boundary line and the tangent vector direction of the lower boundary line is designated to be vertical to a symmetrical face of the plane body; using sweeping rules of the quadratic curves to generate a whole curved profile of the plane wing-body fairing; using the plane body and a wing shape to perform tailoring, then obtaining a wing-body fairing profile; and according to the obtained wing-body fairing profile, manufacturing a plane-wing fairing by hot-press forming. The manufacturing method of the invention uses the quadratic curves to implement quick parametric design of the wing-body fairing profile. Compared with the common methods, the step of controlling section lines is obviated.

Description

technical field [0001] The invention relates to the shape design of an aircraft wing body fairing, in particular to a manufacturing method of an aircraft wing body fairing. Background technique [0002] Aircraft wing-body fairings must meet the space requirements of many systems and structural arrangements, and the aerodynamic resistance generated at the same time should be as small as possible. In the shape design process of wing-body fairings, after multiple rounds of coordination and repeated optimization, the final shape is formed Generally, it is an irregular free-form surface. [0003] For irregular surfaces, it is often generated by guide lines and control section lines. Figure 6 In the current design shown, spline curves are widely used to generate guide lines 61 and control lines 62. Spline curves are characterized by flexibility and strong expressive ability, but at the same time, they are difficult to control and difficult to control in engineering design. Speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/00B64F5/10
Inventor 赵小辉丁玲陈迎春黄炜曹喜锋陈学刚王磊李启明
Owner COMAC
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