Forming device for obtaining curved ribbed panel and its forming process

Abstract

The present invention provides a forming device and a forming process for obtaining a curved wall panel with ribs. The ribbed panel includes a panel 100 and ribs 110 welded on the panel 100. The forming device includes a punch 1 and Die 2, punch 1 includes punch base plate 11 and bump 12 located on punch base plate 11, die base 21 includes die base 21, and die base 21 is provided with a concave die that cooperates with bump 12. Cavity 22, the projection 12 is provided with the opening 13 for accommodating the upper rib 110 of the wall plate 100, the opening 13 forms a closed-loop cavity 14 with the inner top surface 102 of the wall plate 100 after the punch 1 and the die 2 are closed. , the closed-loop chamber 14 is provided with a pressing device for pressing the ribbed panel to be formed so that the outer bottom surface 101 of the panel 100 and the arc-shaped surface 211 on the die base 21 are in close contact.

Description

technical field [0001] The invention relates to the technical field of sheet metal forming, in particular to a forming device for obtaining a curved ribbed wall plate and a forming process thereof. Background technique [0002] Compared with traditional riveted wall panels, integral ribbed panels include machine-added integral panels and welded integral panels, which can meet the needs of modern aircraft for high-performance structures, such as higher strength and stiffness, lighter weight, Reduce processing costs and improve fatigue resistance. Therefore, integral ribbed panels are widely used in the field of modern aerospace as the main component. [0003] Creep aging forming technology is a technology developed for forming parts with complex shapes, especially integral panel parts. It is a forming method that uses the creep characteristics of metals to synchronize forming and aging. In the creep aging forming process, the metal part blank is elastically deformed by a ce...

AI Technical Summary

Problems solved by technology

The cold bending of ribbed panels with large curvature and complex shapes has the following problems: since the pressure head for bending directly acts on the ribs or the surface of the panel, when the curvature of the shape is large and the shape is complex, the ribs are directly loaded Defects such as instability and twisting often occur at the place; when the deformation resistance is large, cracking often occurs

Moreover, the point-by-point bending forming process is adopted, the friction stir welded ribbed panel undergoes severe plastic deformation, and there is a large residual tensile stress after forming, which will have a great impact on the service life of the panel and cannot fully meet the design requirements

[0007] As a new forming method for FSW ribbed panels, aging forming has many advantages, but there are problems such as incongruous deformation between the welded area of ​​the ribs and the panel and the non-welded area of ​​the panel, which affects the appearance accuracy of the panel

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