Method for the production of a semi-finished product for a wing-shaped element
A manufacturing method and technology for semi-finished products, which are applied in the field of manufacturing semi-finished products of wing-shaped components, can solve problems such as surface irregularities
Inactive Publication Date: 2008-07-23
STORK FOKKER AESP
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Problems solved by technology
The disadvantage of this known method is that the surface obtained has irregularities
Method used
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[0027] When carrying out the method according to the invention, the raw materials used are figure 1 Shown in is a curved sheet 1 which has been bent such that a curved front edge 2, a concavely curved panel 3 and a convexly curved panel 4 are formed. The curved sheet 1 is placed on figure 2 In the edge pressing machine 5 shown in , the edge pressing machine has a base 6 with a rubber pad 7 and a pressing part 8 , wherein the pressing part can move up and down and the shaper 10 is fixed on it by a support part 9 . The former 10 or mandrel 10 is also shown in perspective view Figure 4 middle. It has the shape of the inner surface of the finished airfoil element, that is to say, with a leading edge, a trailing edge and curved top and bottom surfaces. The shaper can be prismatic and twisted.
[0028] When pressing a curved sheet 1 in an edge press, the front edge of the former 10 is pushed into the curved region 2 of the sheet 1 . In this way, the curved region is further c...
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Abstract
A method for the production of a semi-finished product (13) for a wing-shaped element (15) having, in cross-section, a front edge (2), a rear edge (14) and an arched bottom wall (3) and an arched top wall (4) that extend some distance apart between the front edge (2) and the rear edge (14), comprises the following steps: bending the sheet (1) with the formation of two panels (3, 4) as well as a curved region (2) which the panels (3, 4) adjoin, placing a former (10) in the bent sheet (1) with the front edge of the former (9) positioned in the curved region (2), forcing the pressure member (8) towards a rubber cushion (7) with the bent sheet (1) enclosed between them and deforming said sheet between the former (10) and the rubber cushion (7), placing the shaped sheet (F) in a rubber press provided with a bottom block having a cavity (16) which has a shape that at least approximately corresponds to the external shape of one of the walls (3, 4) of the shaped sheet (P), pressing the shaped sheet (F) with former (10) between the bottom block (11) and a rubber mat (12), removing the semi-finished product (13) from the rubber press.
Description
technical field [0001] The invention relates to a method of manufacturing a semi-finished product of an airfoil element as well as a method of manufacturing the airfoil element itself. Such airfoil elements are formed in many different forms. So-called vanes fastened to aircraft wing flaps are mentioned as examples. Background technique [0002] Various methods of manufacturing such airfoil elements are known. The extrusion of the component should be mentioned first. In this case, the element does not have to be composed of separate parts, which is quick and relatively economical. However, it suffers from poor dimensional tolerances. This defect occurs especially in the case of relatively small thicknesses. According to another known method, the element is manufactured from sheet material. After preforming the sheet, the sheet is stretched on a stretch-leveler for forming a part (profile) with a bottom and a top. The mandrel is contained in the preformed sheet. The w...
Claims
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IPC IPC(8): B21D53/78
CPCB21D53/78Y10T29/49339Y10T29/49622
Inventor 彼得鲁斯·亨德里克斯·德贝恩埃特谢-尼尔谢·斯特拉茨马毛里茨·埃赫贝特斯·V-D-波尔
Owner STORK FOKKER AESP