DE1921798B - Method of making a cell structure of high strength - Google Patents

Description

Fiber braid, e.g. B. fiberglass to rotate another manufacturing process is the

the shaped body is wound and with the longitudinal so-called winding method. Here a disassembled

and / or / or transversely bziv diagonally directed Barer core of the manufactured to forming the component to ipgselemente stiffened in the cell structure einge- \ fmatten the Kunststbf or ribbons are wound.

are stored, characterized, In order to these components seek the necessary strength

that provided by a molding (3) and to give rigidity will be next

Grooves (2) in the molded body (1) -profile grooves placed as reinforcement 15 step stiffening elements or ribs

stiffening elements from the pre-tensioned _and in turn with a top layer, which at the same time

wound fiber braid (6) during or iu> used for skinning, provided. Because of this it is

Immediately after the wrapping process, it is possible to press a one-piece, somewhat larger

and after hardening the skins produce a larger cell structure, and so it needs

follows. ao with no longer the smaller single shell parts

2. The method according to claim 1, thereby being connected to one another, but is indicates that arranged in the longitudinal direction only the production of a component up to one Profile grooves (2) possible by periodically pressing the certain size. The has a disadvantageous effect Form strip (3) depending on the turntable from enormous expenditure of time, which is necessary to the development of the molded body (1) by means of mechanical as individual layers of the cell structure, Drive via eccentric or cam disc (9) because the stiffening elements are generated on the base will. layer must be glued on. Through the invitation

3. The method according to claim 1, characterized in that stiffening elements of alien type are yeasted indicates that a transverse or diagonal professional materials, it can happen that thereby the loss due to an angular adjustment of the shape stiffening elements inside badly with the ledge (3). Are connected to the basic part and

4. The method according to claim 1 to 3, whereby the necessary strength would be achieved, characterized that at intersections of the In addition, the stiffening elements must mitein-profiling Nodal fittings (11) stored on the other are connected, and this in turn prepares will. 35 additional difficulties.

5. Cell structure according to claim 1 to 4, the object of the invention was to provide a cell through characterized in that in the profile grooves (2) to create len structure, in which z. B. a whole Stiffening strips (12) can be stored in a single piece in the fuselage of an aircraft which electrical or hydraulic lines can be produced. It should also be very strong are. 40 and, depending on requirements, longitudinal

. and / or. or transversely or diagonally directed stiffening elements stored in the cell structure

be, with a pre-tensioned tape or mat made of fiber mesh, wetted with a binding agent, 45 z. B. glass fiber to ge a rotating molded body

The invention relates to a method for manufacturing. According to the invention, the goal is thereby Development of a cell structure of high strength, in particular achieved that provided by a molded strip more for missiles, consisting of fiber-reinforced grooves in the molded body profile grooves as stiffening plastic, being with bias a wound with a lemente from the bias Binder-wetted tape or mat made of fiber mesh 50 fiber mesh during or immediately after the braid, e.g. glass fiber, can be pressed in around a rotating form-winding process and after being removed from the body is wound and the skinning takes place longitudinally and / or / or hardening. To you as much as possible or to allow transversely or diagonally directed stiffening elements to be used in accordance with elements are embedded in the cell structure. a further embodiment of the invention in the longitudinal

Methods are known for producing a profile grooves arranged in the direction by periodic

Plastic structure. For this purpose, the molding is usually pressed as a function of

a negative mold is used, in which a plastic - the rotational position of the molded body by means of mechanical

layer applied and with additional adjustment see drive via eccentric or cam disc

fastening elements, e.g. B. honeycomb is provided. Submitted.

then a so-called skin ^{6o is created.} This makes it possible to use a molded body

carried out so that the structure has a high Festig- per, the z. B. only from individual frames or ribs

receives. After hardening, this part is made of, one by one in a single operation

Taken out the form and, if necessary, woven a band of fiber braid moistened with a binding agent.

put together another part of the cell. This speed can and at the same time with this winding device

The cell part can be shaped as a fuselage part or a wing part and the stiffening elements

of an aircraft. This manufacturing skill. This creates a very firm and twisting

process has the disadvantage that the individual stable cell structure of any size without

Components require a basic shape. They insist that afterwards individual parts are assembled

must, Another advantage is the fact that anzuse- körpers 1 is achieved. Since at a certain angle

hen that the stiffening elements a certain idea of the shaped body II a stiffening groove

Have tension and thereby 'the finished parts must be pressed, with the help of an eccentric

weight-wise very easily with the same strength or a cam 9 the periodic movement

can be performed, 5 generation achieved. By means of a spring 10, the formula

Using an exemplary embodiment, let the first 3 be pulled out of the groove 2 again,

finding explained in more detail. But it shows Da not only for reasons of strength

Fig. 1 a schematic representation of a winding pre-longitudinal profiling is often not sufficient, is also a

aisle, cross or diagonal profiling necessary. Here

Fig. 2 to 5 arrangement of the stiffening element * o is set otherwise parallel to the longitudinal axis

ments, molding 3, which in the longitudinal profiling with the

F i g. 6 Training at the crossing points. same feed rate as the supply reel with the

As can be seen from Fig. 1, a steering roller is shown schematically in the axial direction continuously weiterbe-winding device. The shaped body 1 is moved, only by a certain angle of incidence is made up of individual ribs and ribs and serves as 15 adjusted, and a diagonal profile is obtained, the base frame of the component to be produced. As an example of a steep thread. If you set the game, a circular cross-section of a molding 3 perpendicular to the longitudinal axis of the molded body was selected, in which stiffeners in the longitudinal direction and the feed is switched off, you get fastening elements. A transverse profile on the outside. Of course, you can also see the molded body 1 are ao timely perform different profiles at certain intervals, placed in grooves 2. The molded body 1 is in which one can work several moldings with their own longitudinal axis rotatable on a frame 4 angle of incidence. This gives you how gert. In the horizontal plane from the center of rotation is shown in Fig. 2 to 5, stiffening elements a molding 3 on the frame 4 displaceable in different directions. Arranged for strength reasons. From a supply reel 5, an as can advantageously be profiled at the intersection points of tape 6 via a deflection roller 7 on the shaped body, as shown in FIG. 6 shown, also knot 1 wound up. Fittings 11 are stored above the pulley 7. As a result, a storage container provided with a binding agent is sufficient that the terminal 8, which arises depending on the load, is arranged on the underside of which the main flow of binding agent is not disturbed. Can flow out into the profile groove over the entire bandwidth. 30 th 2 stiffening strips 12 can be stored. The stiffening strips 12 can be wound from pipe. Since at the same time binders consist of shaped pieces similar to the previous one, in which the electricity container 8 flows out and wets the strip 6, hydraulic lines or hydraulic lines are stored. For the sake of simplicity, a per 1 was created in the first layer of the cell structure on the shaped body 35 in the drawing. Perio molding 3 with a semicircular cross-section is guided upwardly depending on the rotational position of the gearing means. However, the molding 3 made of con-shaped body 1 can also have a different shape, pressed in by the molding 3, the profile groove for structural reasons. The mechanical drive of the molding, of course, is limited to the production is shown in dashed lines and can, for. B. be designed as a chain 40 not only on circular cross-sections of the cell drive. This drive is so structured; All other profiles can also be required so that a periodic pressing of the cuts can be generated, such as oval profiles, wing molding, depending on the position of the molding profile and the like.

1 sheet of drawings

Claims (1)

only from smaller individual parts, which then have to be connected to patent claims: a whole. Care must be taken to ensure that the appropriate 1. Process for the production of a cell! · Joint structure with suitable connecting elements high strength, especially for flight 5 hen. In terms of strength, however, this has a great effect body, consisting of fiber-reinforced plastic, is disadvantageous because it is not possible to remove the components fabric, with a preload with a or stiffening element to create a preload Divide the wetted tape or mat.