WO2012076155A2

WO2012076155A2 - Element for producing a semi-finished fibre product, method and computer programme product for producing the element, device and method for producing a semi-finished fibre product and system for producing a fibre product

Info

Publication number: WO2012076155A2
Application number: PCT/EP2011/006107
Authority: WO
Inventors: Bernd Schottdorf
Original assignee: Cgb Carbon Grossbauteile Gmbh
Priority date: 2010-12-07
Filing date: 2011-12-06
Publication date: 2012-06-14
Also published as: DE102010053635B4; WO2012076155A3; EP2648892A2; DE102010053635A1

Abstract

The invention relates to an element (212; 318; 400) for producing a semi-finished fibre product and to a method and a computer programme product for producing such an element (212; 318; 400), comprising the steps: imaging the surface content of a further processed semi-finished fibre product (104; 200; 300; 412) onto an enveloping surface, defining the element (212; 318; 400) using the enveloping surface and forming the element (212; 318; 400) according to the enveloping surface. The invention further relates to a device and a method for producing a semi-finished fibre product, comprising the steps: defining a first angle (312, 314) of a fibre (302, 304, 306, 308, 322; 416) in relation to a longitudinal axis (202; 310; 414) of a fibre product (104; 200; 300; 412), defining a second angle (324, 326) as a function of the defined first angle (312, 314) and arranging the fibre (302, 304, 306, 308, 322; 416) on an element (212; 318; 400) for producing a semi-finished fibre product in order to form the semi-finished fibre product in the first (312, 314) and/or second angle (324, 326) in relation to a longitudinal axis (214; 320; 402) of the element (212; 318; 400). Finally, the invention relates to a system (100) for producing a fibre product (104; 200; 300; 412).

Description

ELEMENT FOR PRODUCING A FIBROUS SEMI-PRODUCT, METHOD AND COMPUTER PROGRAM PRODUCT FOR PRODUCING THE ELEMENT,

DEVICE AND METHOD FOR PRODUCING A

FIBER SEMINAR AND SYSTEM FOR THE PRODUCTION OF A

FIBER PRODUCT

FIELD OF THE INVENTION The present invention relates to an element for producing a semi-finished fiber product and to a method and computer program product for producing the element, to an apparatus and a method for producing a semi-finished fiber product, and to a system for producing a fiber product.

STATE OF THE ART

As elements for producing a semifinished fiber product, for example, cores, too

Winding cores or prototypes known Furthermore, devices and methods for

Production of semi-finished fiber from the "Handbuch Verbundwerkstoffe", Neitzel,

Mitschang, Hanser Verlag 2004, known. A known method, also called winding method, is used to produce fiber parts, fiber composite parts, moldings, such as

Containers, pipes, axles and shafts.

Suitable fibers are e.g. Carbon fibers, also called carbon fibers, glass fibers,

Aramid fibers or the like and / or combinations of such fibers. In cylindrical and conical moldings with one-sided bottom of the winding core after the

Production process pulled out of the molding and later used again. In other moldings, the hubs remain in the molding. They are called lost nuclei and may be e.g. improve the diffusion resistance of a molded part. There are also known fusible cores.

Among the known production processes include the peripheral winding and

Cross-winding, in which a filament discharges one or more continuous fibers or fiber bundles (rovings) on a rotating known winding core. A matrix provided for embedding the fibers consists, for example, of suitable synthetic resin mixtures. Suitable matrix systems are formable during winding, give the composite part its shape after curing and ensure the transmission of force between the fibers and fiber layers.

Further, from the Composite Materials Handbook by Schwartz, McGraw-Hill Verlag, 2nd edition 1991, a winding method for producing a fiber semi-finished product is known. In this case, a resin-impregnated fiber is wound onto a rotating steel cylinder to form a semi-finished fiber. The steel cylinder has a longitudinal notch. The longitudinal notch in the steel cylinder makes it possible to cut open the fiber semi-finished product and remove it from the steel cylinder. The removed fiber semi-finished product is cut into pieces and formed with a press into a fiber composite part and cured. Before pressing, a plastic film is applied to the semi-finished fiber, which simplifies handling. The plastic film is peeled off after pressing from the cured fiber composite part.

Furthermore, a method for producing a fiber-reinforced plastic product is known from DE 3 133 733 C2. The method provides for winding a fiber strand onto a rotatable drum. The winding takes place in a helical pitch and in an opposite slope. The fiber is impregnated or impregnated either before winding or thereafter with a resin. Following winding, a prepreg made in this way is cut from the drum. The prepreg serves as

Starting material for the production of products. In the manufacture of products from prepregs, however, it is known that expensive waste and residual material is obtained. Finally, DE 1 779 433 A1 describes a method and a device for

Production of a composite structure. The composite structure is formed by winding a fiber on a winding core. The orientation of the fibers runs depending on the direction of the main stress direction of the composite structure occurring during operation. Several windings form a laminate. After lifting several laminates from the winding core they are placed in mold cavities and supplied curable resin filling material. The laminates are then pressed there until hardened. By curing the laminates results in a composite structure, which is tailored to measure according to DE 1 779 433 AI. However, the cutting of the composite structure generates expensive waste or

Residual material. The object of the present invention is to produce semi-finished fiber products and fiber products more cost-effectively.

SUMMARY OF THE INVENTION

This object is achieved by the independent claims.

According to the invention, an element for producing a semi-finished fiber product comprises an envelope surface which defines the element and on which the semifinished fiber article can be formed. The Hüllfäche is formed depending on the surface content of a further processed semi-finished fiber.

Preferably, the element may be formed as a core, a winding core, a master mold and the like. In this case, the element can be designed as a coiling cylinder, cone, truncated cone, paraboloid or body with other suitable geometries. Also composed of bodies, such as cylinders with attached cone, hourglass-like double cone, cone-cylinder cone, etc. are included. In addition, the element forms with

Include undercuts. The fact that the element can have undercuts or other complex shapes, it differs from known removable archetypes. A

Undercut is generally a profile, relief or other protruding form. Undercuts in semifinished or further processed semifinished fiber products can practically not be realized with a common fiber winding process and removable hubs. The winding core would be blocked by the undercut and could not be removed from the semi-finished fiber. The

However, the element according to the invention preferably does not have to be pulled out of the semifinished fiber product, so that undercuts can be produced in the semi-finished fiber product.

Furthermore envelope surface means a surface which encloses, surrounds or surrounds the volume of the element. The envelope surface is not limited to an area that is covered by something. The envelope surface can also generally be a surface or the sum of a number of surfaces surrounding an arbitrarily shaped volume. The formation of the semifinished fiber product on the envelope surface preferably comprises a winding, covering, covering or the like of the envelope surface with a fiber, with a fiber roving, a sliver or with a similar elongated, thin, flexible and tensile fiber material. The fiber may be formed as an endless fiber. Alternatively, however, the fiber may also comprise a plurality of short or long individual fibers or fiber bundles.

The envelope surface of the element can be formed coextensive with the surface content.

Alternatively, it can be made larger. An advantage of the surface equality is that a semifinished fiber product can be produced with predetermined end or target dimensions and subsequent cutting is reduced or avoided. Since fiber materials such as carbon and aramid are expensive, the flatness of the surface can mean low-waste or no-waste

Semi-finished fiber can be produced at a lower cost.

Preferably, the envelope surface may be formed approximately coextensive with the surface content, i. 80% to 99% surface equality.

The material of the fiber may comprise, for example, the following materials: carbon, carbon, ceramic, boron carbide, quartz glass, silicon, silicon carbide, aluminum oxide,

Silicon carbide nitride, boron nitride, glass, synthetic material, aramid, polyethylene,

Polyamide, polyester, metal, boron, tungsten, steel, aluminum, natural material,

Vegetable fibers, flax fibers, sisal fibers and combinations thereof, e.g. B. a first material for a fiber core with a wrap of a second material.

The formed semi-finished fiber product is preferably a knitted fabric, mesh or scrim made of fibers without or substantially without a matrix. In addition, the fiber composite semifinished product is preferably not a hollow body, such as is produced in a known hub process.

The semi-finished fiber product may also comprise a matrix. The fabric of the matrix preferably comprises thermosets, such as epoxy resin, or thermoplastics. For thermally highly loaded fiber products can be used for the matrix on ceramic or metals. The matrix preferably serves as an adhesive between adjacent portions of the fiber, but is not limited to the action of an adhesive. The fiber and a non-cured matrix together preferably form a fiber composite semifinished product,

Semi-finished fiber or the like. Even in the cured state, the matrix and the fiber can be understood together as semi-finished fiber, namely in particular when the semifinished fiber is further processed into a further semi-finished or finished product.

Further processing of the semifinished fiber product may include shape, condition (e.g., cure), and dimensional change. The semi-finished fiber can be compressed in certain sections, stretched in others. The upsetting or stretching can lead to a change in the surface content of the further processed semi-finished fiber product compared to a trained semi-finished fiber.

The individual fibers or the endless fiber can be arranged side by side lying on the envelope surface. In addition, the fiber can be arranged in the form of a yarn package in superimposed layers.

The envelope surface can also be imaged depending on the surface content of the further processed semifinished fiber product. The mapping in this case means a mathematical relationship between the surface content and the envelope surface.

The avoidance or reduction of fiber cutting can advantageously be achieved with the element according to the invention in that the envelope surface of the element in FIG

Dependence on the surface content of the further processed semi-finished fiber product is formed. Would, for example, the surface content in the further processing of the

Semi-finished fiber, e.g. by upsetting or stretching to be too large (or too small) for a fibrous product, the envelope surface of the element may pass through

Dependency already be adapted in advance accordingly. As a result of less or no accumulating fiber waste, the semifinished fiber product can be produced more cheaply.

Further, forming also means making or machining, such as milling, turning, grinding, etc.

According to the invention, the enveloping surface can be arranged around a longitudinal axis of the element

be rotationally symmetrical lateral surface. The rotationally symmetrical lateral surface preferably forms a special case of the envelope surface.

An advantage of a rotationally symmetrical lateral surface lies in a simplified

Preparation of the element e.g. by means of a lathe or lathe. Lathes are usually simply constructed 2-dimensional processing machines and therefore built less expensive than 3-, 4- or 5-axis milling machines. Also the ratio of

Working space and processing machine price can be cheaper for lathes, so that the element with a lathe is cheaper to produce.

Such a lateral surface preferably additionally comprises a bottom and / or cover surface of the element enclosed by the lateral surface.

The envelope surface or the lateral surface can be smooth, guide grooves, one

Have anti-slip coating or otherwise rough surface. A rough surface or guide grooves may be advantageous for winding with a fiber to prevent slippage of the fiber on the element.

According to the invention, the envelope surface of the element can be formed as a function of the edge shape of the further processed semi-finished fiber product.

The edge shape, or the edge, can be used as a limitation of the surface content of the

further processed semi-finished fiber products are understood. For example, a rectangular edge shape during imaging leads to a cylindrical

Envelope of the element. As a further example, a trapezoidal edge shape of the semi-finished fiber product present in the further processed state leads to a frustoconical envelope surface of the element. If there is a further processed semifinished fiber product, which corresponds to simple geometric shapes, such as rectangle, square, triangle, trapezium, then advantageously an envelope surface can be formed depending on the surface content and / or the edge shape of the further processed semifinished fiber product. The dependence corresponds in this case to a winding of the simple geometric shape into a closed surface, namely the envelope surface. By winding such a simple geometric shape, a tubular envelope surface may be formed, which comprises a lid and / or bottom.

According to the invention, shell circumferences at intervals along the longitudinal axis of the element can correspond to semifinished fiber model transverse lengths at the same distances along a longitudinal axis of a semi-finished fiber model

The semifinished fiber model may e.g. be present as a prototype or created.

Preferably, the semifinished fiber model is made of an easily modelable material, such as wood, clay, plastic, etc.

Preferably, the longitudinal axes of the element and the semifinished fiber model are fixed. The fixing of the longitudinal axis preferably takes place before the production of the element and before the production of the semi-finished fiber model, e.g. also in a technical drawing.

The longitudinal axes serve advantageously as a common reference line for the distances. If a longitudinal axis is defined in the semi-finished fiber model, then a semifinished fiber model transverse length can correspond to the length of a perpendicular to this longitudinal axis, whereby the semi-finished fiber model transverse length is limited by the edge of the semifinished fiber model.

In addition, a reference point can be defined, wherein points on the semi-finished fiber product or semifinished fiber model or the element are determined by means of vectors with respect to the reference point. By means of a vector transformation, the surface content and / or the edge shape of the further processed semi-finished fiber product can be imaged onto the element.

One advantage of a semi-finished fiber model is that the surface content and / or the edge shape of the further processed semi-finished fiber product can be reproduced exactly or at least approximately on the envelope surface of the element, without having to use a computer model of the semifinished fiber product as the starting point.

The semifinished fiber model may also be a computer model, i. to be a virtual model. An advantage of the computer model is that no prototype or the like is to be made as a semifinished fiber model, so that the cost of producing the

inventive element can be reduced. According to the invention, the distances in areas of a curvature of the

be further processed semi-finished fiber or semi-finished fiber model and be large in linear areas of further processed semi-finished fiber product.

The curvatures can be present at the edges of the further processed semifinished fiber product. However, the curvatures may also include bulges in the surface of the further processed semi-finished fiber product. A linear region may include planes or even, flat surfaces, but also areas with a small curvature. Preferably, in a linear region of the wide-processed semi-finished fiber product, a distance defined by the beginning and end of the linear region is sufficient to image the linear region onto the envelope surface of the element. In areas of low curvature smaller distances may be provided, as in

Areas with large curvature.

An advantage of smaller distances is that the mantle or envelope surface of the element is more accurate to the surface content and / or the edge shape of the further processed

Semi-finished fiber can match. An advantage of the more precise correspondence of the surfaces can lie in less to no accumulating waste on the semi-finished fiber product.

If there are many only linear regions in the semifinished fiber product, it is advantageously possible to form an enveloping surface with a few spacings as a function of the surface content and / or of the edge shape of the further processed semi-finished fiber product.

Furthermore, according to the invention, a method for producing an element for

Production of a Semifinished Fiber Product Depicting the surface content of a further processed semi-finished fiber product on an enveloping surface, defining the element based on the enveloping surface and forming the element in accordance with the enveloping surface.

The imaging may preferably be mechanical based on an objective

Semi-finished fiber model and / or virtually done using a computer-generated semifinished fiber model. The imaging may also include forming. If the semi-finished fiber product is formed on the envelope surface and not further processed, then the surface content of the semifinished fiber product can essentially correspond to the surface content of the envelope surface. If the semifinished fiber product is further processed, the surface content of the semifinished fiber product may thereby change at least in sections. For example, if the semi-finished fiber product is pressed or otherwise shaped, the semifinished fiber product can be compressed or stretched so that the surface content changes.

According to the invention, the envelope surface can be imaged as a rotationally symmetrical lateral surface. The surface content of the further processed chaff can be mapped mathematically on the rotationally symmetrical lateral surface. This may in this case be a winding, i. be a reverse process.

According to the invention, the envelope surface may vary depending on the edge shape of the

further processed semi-finished fiber products are mapped. Is, for example, a

further processed semi-finished fiber, which corresponds to simple geometric shapes, it can advantageously be quickly and easily the envelope surface depending on the surface content and / or the edge shape of the further processed semi-finished fiber products are mapped. The dependency may in this case comprise a winding of the simple geometric shape into a closed surface, namely the envelope surface. By winding such a simple geometric shape, a tubular envelope surface may be formed, which comprises a lid and / or bottom.

According to the invention, the surface content of the further processed semifinished fiber product can be imaged in the same area on the enveloping surface. Imaging can also include a simple, in particular mechanical, copying the surfaces of a further processed semifinished fiber product.

According to the invention, the shape of the further processed semifinished fiber product can be determined, distances along a longitudinal axis of the further processed semifinished fiber product determined, semi-finished cross-fiber lengths are determined in the distances and fiber semi-finished cross-sections are mapped to cladding circumferences of the element at intervals along a longitudinal axis of the element. Preferably, the longitudinal axes are determined along the element or along the further processed semi-finished fiber product. The setting can be made using a technical drawing. The determination of the shape also means a predefinition or definition of the shape, in particular of the surface content and the edge shape of the further processed

Semifinished fiber. The determination or definition of the shape can be carried out on the basis of a simple technical drawing. The setting of the distances can be done for example by drawing. The determination of the semi-finished fiber transverse lengths can be done by means of a length measuring means. The mapping of the semifinished fiber cross-sections means

For example, a transfer of the measured semi-finished fiber cross-lengths on shell circumference of the element. A measured fiber semi-finished transverse length can be just as long as the corresponding shell circumference. The aforesaid steps can be carried out by simple means, e.g. Paper, measuring tape and the like or even with a simple

Computer program and a CAD drawing of the semi-finished fiber, or the

further processed semi-finished fiber products are performed.

According to the invention, a computer program product for creating an element model comprises a function for mapping a surface content of a semi-finished fiber model onto an envelope surface, which defines the element model. The computer program product preferably includes a CAD (Computer Aided Design) program and a CAM (Computer Aided Manufacturing) program. CAD means one in this case

Computer-aided design of the element model and / or semi-finished fiber model. The surface content of the semi-finished fiber model can be mapped by a mathematical function on the envelope surface of the element model. By means of a CAM program, the created element model can then be computer-aided, for example, by means of a CNC lathe. The computer-aided creation of the element model makes the manufacturing process for an element fast, repeatable, reliable, and accurate. According to the invention, an apparatus for producing a semifinished fiber article comprises an element with a longitudinal axis, a Faserablegeeinrichtung which arranges a fiber on the element at a defined first angle to the longitudinal axis to form the semifinished fiber, a further processing device for further processing of the semifinished fiber to a A fiber product, wherein the defined first angle is determined as a function of a second angle of the fiber in the fiber product with respect to a longitudinal axis of the fiber product.

A fiber depositing means may comprise any means which can arrange a fiber on the element, e.g. a guide eye, a robot arm and the like. The

Faserablegeeinrichtung preferably moves with a certain feed relative to the element in order to arrange the fiber at a defined angle to the longitudinal axis can. The feed rate of the Faserablegeeinrichtung can determine the slope of the applied fibers.

A cutting device may be provided to the formed on the element

Seperate semi-finished fiber and remove it from the element. The split

Semi-finished fiber can also fall down automatically from the element. The further processing device can the semi-finished fiber to another

Semi-finished fiber product, semi-finished fiber product, to further process a fiber product or a fiber end product.

Since the orientation of the fiber in semifinished fiber products can change as a result of further processing, an advantage of the dependence of the defined first angle on the second angle is that a fiber orientation or fiber direction desired in a fiber product is already taken into account when the semifinished fiber product is formed on the element. As a result, the fiber orientation after further processing can correspond to the desired fiber orientation in the fiber product.

By the dependence of the defined first angle of the second angle of the fiber in the fiber product, the stiffness-to-weight ratio of the entire fiber product can be advantageously improved. This is achievable in particular by the fact that the fiber, and thus the fiber weight, is inserted, wound, woven, installed, etc., where the fiber has the desired effect, such as rigidity, through the defined orientation or the defined angle essentially there in the fiber product achieved for the entire fiber product. In places of the fiber product, which acts in use stronger Belating, thereby more fiber material or thicker fiber layers may be present as in places where act on use of the fiber product low load. A desired fiber orientation in the fiber product further allows for stiffening or increasing the tensile strength in the fiber product in one or more particular directions.

Preferably, the aforementioned element for producing a semi-finished fiber product is an element according to the invention.

According to the invention, the fiber depositing device can at least partially arrange the fiber geodetically on the element.

Geodetic generally means the theoretically shortest connection between two points on a curved surface, the so-called geodesic line. On a spherical surface is a geodesic compound, for example, a circular arc. To arrange the fiber geodetically on the element essentially means to arrange the fiber on the shortest path between two points on the element. An advantage of geodetic placement may be that the fiber thereby slips less on the element.

Preferably, the fiber may be arranged on the sections of the element geodesically and on other sections at the defined first angle, e.g. to improve the tensile strength of the semifinished fiber in this orientation. Sections may in this case include portions of the fiber or layers of superimposed fibers.

According to the invention, the fiber depositing device can have at least one degree of freedom.

One degree of freedom generally corresponds to the number of movement possibilities of two objects to each other, for. B. a rotation of Faserablegeeinrichtung to the element or a translation of Faserablageinrichtung along the element. According to the invention, the Faserablegeeinrichtung the fiber sections on the

Arrange the element at the defined angle to the longitudinal axis of the element

According to the invention, the element can be rotatable about its longitudinal axis and the

Faserablegeeinrichtung may be movable parallel to the longitudinal axis. With this configuration, the semifinished fiber can be produced inexpensively, since only a frame for receiving the element, a rotary drive for rotating the element and a mounted on a rail Faserablegeeinrichtung may be required with a linear drive.

According to the invention, the further processing device may comprise a cutting device and / or a press. A cutting device is, for example, a knife, a pair of scissors or the like, which can be used to cut the semifinished fiber product formed on the element along the element with a cut, so as to obtain a flat semifinished fiber product. The semifinished fiber product may fall off the element after the cut. Alternatively, the

Semi-finished fiber products are removed from the element and fed to a press.

Subsequently, the semifinished fiber can be shaped and cured according to a pressing punch, a die or male.

According to the invention, a method for producing a semi-finished fiber product may comprise the steps of defining a first angle of a fiber with respect to a longitudinal axis of the semifinished fiber product, defining a second angle as a function of the defined first angle and arranging the fiber on the element for forming the semifinished fiber article at a second angle with respect to one Longitudinal axis of the element.

The orientation of fibers in a semi-finished fiber can affect the tensile strength or resilience of the semi-finished fiber in certain directions. An advantage of the method according to the invention for the production of the semifinished fiber product may be that to improve the accuracy of the orientation of the fibers in the semifinished fiber product.

According to the invention, a matrix may be supplied during or before the fiber is placed on the element.

An advantage of feeding the matrix during the placement of the fiber on the element may be that more time remains to cure or partially cure the matrix. An advantage of feeding a matrix before placing the fiber on the Element may be that the fiber is better impregnated with the matrix, so that less air pockets in the semi-finished fiber arise. The supply of a matrix from the semifinished fiber product may result in a fiber composite semifinished product. According to the invention, a first angle of a fiber with respect to the longitudinal axis in

Sections. In addition, the fiber may be arranged on the element at the second angle with respect to the longitudinal axis of the element in sections.

Preferably, a fiber passes over several sections, each with a defined angle around the element. This fiber guide can the tensile strength or

Improve resilience of the semifinished fiber in certain directions.

According to the invention, the fiber can be arranged at least in sections geodetically on the element. As a result, the fiber generally shifts less on the element.

According to the invention, the semi-finished fiber formed on the element, in particular along the longitudinal axis of the element, be cut open and removed from the element. The semi-finished fiber can be cut both parallel to the longitudinal axis of the element as well as at a certain angle thereto. To a certain edge shape of the

In addition, semifinished fiber can be cut in a defined curve. According to the invention, the semi-finished fiber product can be pressed into a further processed semi-finished fiber product and / or into a fiber product.

Preferably, the pressing comprises forming the semifinished fiber product from a flat to a three-dimensional shape. Preferably, the pressing of the semifinished fiber product also includes hardening of the semifinished fiber product to form a fiber product or to a fiber composite semifinished product or another semifinished fiber product.

According to the invention, a plurality of fiber products can be glued together. For example, fiber product with semi-finished fiber product, fiber product with

Semi-finished fiber composite, fiber composite semi-finished with fiber composite semi-finished, semi-finished fiber with semi-finished fiber and the like are glued together. Preferably, the fiber products are provided with a release agent prior to pressing. The release agent can take out, molding, forming or pressing the

Facilitate semi-finished fiber products in the press. After pressing, the release agent

preferably lasered in at least one section with a laser. The laser ablation involves evaporation or burning of the release agent.

Preferably, the fiber product is applied to the eroded portion with an adhesive, e.g. Adhesive, provided and bonded to another fiber product. As a result, stable, loadable, in particular hollow and therefore lightweight fiber composite profiles can be produced. According to the invention, the element for producing a semi-finished fiber for the

said steps be an inventive element.

According to the invention, a system for producing a fiber product comprises a

Imaging unit for imaging the surface content of a semifinished fiber model on an enveloping surface of a winding core to be produced, a manufacturing unit for producing the

Winding core based on the envelope surface, a winding unit for winding the enveloping surface of the winding core with a fiber at a defined angle to a semi-finished fiber

a cutting unit, which cuts the semifinished fiber product along the winding core, a release agent unit, which provides the cut semi-finished fiber product with release agent, a pressing unit, which provides the release-treated semi-finished fiber to a

Fiber product forms and cures, and a laser unit which ablates the release agent from the fiber product.

The semifinished fiber product may drop after cutting itself from the winding core or removed from a pickup and fed to the release agent unit.

Preferably, an imaging unit comprises a computer or simulation computer. The imaging unit may also include a mechanical copying device, marking dots and measuring tape, etc. The manufacturing unit preferably comprises a CNC-controlled Milling machine or lathe. The pressing unit preferably comprises a mechanical press. The laser unit preferably comprises a device for generating a high-energy radiation. According to the invention, the fiber may be impregnated with a matrix. If the fiber is impregnated with matrix, a fiber composite semi-finished product can be produced on the winding core. The fiber composite semifinished product can thus be more dimensionally stable than the semifinished fiber product in which only fiber is above fiber. The fabric of the matrix preferably comprises thermosets, such as epoxy resin, or thermoplastics. For thermally highly resilient fiber products can be used for the matrix on ceramic or metals.

According to the invention, a connection unit may comprise a plurality of fiber products and / or

Provide semifinished fiber products with an adhesive and connect them together. As a result, stable, loadable, in particular hollow and therefore lightweight fiber composite profiles can be produced. The adhesive preferably comprises a matrix material. But also suitable adhesives can be used. BRIEF DESCRIPTION OF THE DRAWINGS

The attached drawings show:

Fig. 1 shows an inventive system for producing a fiber product

2a shows a further processed semi-finished fiber product according to the invention

2b shows an inventive element for producing a semi-finished fiber product

Fig. 3 a shows a further processed semi-finished fiber product according to the invention

3b shows a method for producing a semifinished fiber product

Fig. 4a shows another inventive element for producing a semi-finished fiber product Fig. 4b another further processed semi-finished fiber product according to the invention DESCRIPTION OF THE EMBODIMENTS

Hereinafter, embodiments of the invention with reference to the accompanying

Schematic drawings explained in more detail.

Fig. 1 shows a system 100 for producing a fiber product or a

Fiber composite product 104. According to the system 100, an element model 102, also called a hub model, is first created virtually with a computer. Alternatively, this model can also be created manually. The element model 102 is based on a fiber product model, a further processed semi-finished fiber product or a fiber composite product 104 in its dimensions. The element model 102 is an illustration of the

Surface element and the edge shape of the fiber composite product 104. The element model 102 serves as a measure to produce on the basis of this data, for example by means of a CNC-controlled lathe 106, a material from an element, also called winding core. The material of the winding core may include metals such as aluminum or steel, and

for example, as a block or in other suitable geometries, from which the winding core is worked out.

The finished winding core is rotatably mounted and driven by a rotary drive (not shown). A Faserimprägnier- and storage device 108 impregnated or soaked a carbon fiber, for example, with epoxy resin, also called matrix. In a step 109, the rotating element is wound by the fiber impregnation and leveling device 108 with the impregnated carbon fiber. The Faserimprägnier- and

Laying device 108 moves with a certain feed along the

Longitudinal axis of the winding core. After several windings of the carbon fiber, a multi-layer fiber composite semi-finished product, also matrix-impregnated, is formed on the winding core

Called semi-finished fiber product.

A cutting device 1 10 cuts the finished fiber composite semifinished product in a section along the winding core, so that a mat-like or flat

Semi-finished fiber composite arises. The mat-like fiber composite semi-finished product is removed from the winding core, provided with a release agent and placed in a press 1 12. In the press 1 12, the mat-like fiber composite semi-finished product is pressed by means of a die and male in a particular shape, heated and cured at the same time, so that Fiber composite product 104 is formed. The release agent on the fiber composite semifinished facilitates the molding and removal from the press 1 12. The fiber composite product 104 is

according to the system after pressing and curing with a laser device 1 14 erasured. The laser 1 14 places it in areas, which subsequently with one or more others

Components are to be bonded, the fiber up to a predetermined depth freely. Of the

Laser 1 14 burns epoxy resin and release agent.

According to the system, the fiber composite product 104 is provided at the exposed areas with adhesive and with one or more other components, e.g. another one

Fiber composite product, glued.

Instead of the element model 102, the element can also be made by directly measuring a fiber composite product prototype and transferring the dimensions to the element. The mechanical or virtual transfer of dimensions of the fiber composite product from a technical drawing on the element is possible. An area is cut into planes parallel to each other. The resulting intersection lines are converted into circles whose extents correspond to the length of the respective intersection lines. The centers of all resulting circles are arranged on a straight line such that the circle planes are aligned parallel to one another and the distance of the center points corresponds to the distance of the cutting planes of the original surface.

FIG. 2 a shows a further processed semi-finished fiber product or a semi-finished fiber composite, for example a carbon fiber reinforced plastic, from which a B pillar 200 for a motor vehicle is formed. The B-pillar 200 is shown in plan view and has a longitudinal axis 202. The B-pillar 200 tapers trapezoidal from bottom to top. At the lower and upper end, the B-pillar 200 is equipped with flange areas. The

Flange areas may e.g. attached to the top of the roof and at the bottom of the vehicle frame. In the upper and lower regions 204, the B-pillar 200 is strongly arched or curved. In the middle region 206, the B-pillar is slightly curved, less than in the region 204 and designed almost linear.

In Fig. 2a, distances are determined along the longitudinal axis 202 depending on the curvatures. In the high curvature region 204, small distances 208 are set. in the Low curvature region 206 are set at greater distances 210 as compared to distances 208. Along the distances 208 and 210, cutting lengths Ii, I ₂ to I _{n of} the B-pillar 200 are measured. Fig. 2b shows a winding core 212 as an element for producing a semi-finished fiber product. The winding core 212 is initially present, for example, as a cylindrical rod material (not shown) and is, for example, by means of a lathe according to the

Circumference U | , u ₂ to u _n produced. For this purpose, the cutting lengths Ii, 1 ₂ to l _{n are} imaged on circumferences ui, u ₂ to u _{n of} the winding core 212. The winding core 212 has a longitudinal axis 214 which forms a central axis for the circumference ui, u ₂ to u _n . The circles are also arranged at the same distances 208, 210, respectively, as defined in the B-pillar 200.

With the technique illustrated in FIGS. 2 a and 2 b, the surface content and the edge shape of the B pillar 200 are reproduced on the winding core in reasonable accuracy with little effort, that is to say inexpensively. This eliminates any waste because the B-pillar 200 and the hub 212 are the same area.

3a shows a further processed semifinished fiber product 300. The fiber semifinished product 300 has a plurality of carbon fibers 302, 304, 306 and 308, which are arranged in a crosswise superimposed manner by a fiber depositing device (not shown). Furthermore, the semi-finished fiber 300 comprises a longitudinal axis 310. The carbon fibers 302 and 304 close to one another

Semi-finished fiber angle 312. The carbon fiber 302 and the longitudinal axis 310 enclose a further fiber semifinished product angle 314, also called a defined angle.

The orientation of the fibers 302, 304, 306 and 308 defines an angle, so that a high tensile load of the further processed semi-finished fiber 300 in the directions 316 may be allowed. The directions 316 correspond to the longitudinal directions of the fibers 302, 304, 306 and 308.

The further processed semi-finished fiber 300 is produced by means of an element or winding core 318. The element 318 may be made virtually or manually according to the technique illustrated in FIGS. 2a and 2b. The winding core 318 in FIG. 3b has an axis of rotation 320. On the winding core 318 several sections of a single continuous fiber 322 are visible. The endless fiber 322 is arranged in several turns on the winding core 318. The individual fibers 302, 304, 306, and 308 correspond to portions of the continuous filament 322. The filament 322 includes a mandrel angle 324 with the longitudinal axis 320 of the mandrel 318, also called a second angle. In addition, continuous filament 322 includes another mandrel angle 326 with itself. By repeatedly wrapping the element 318 with the endless fiber 322, a semifinished fiber product is produced, which is subsequently cut off from the winding core 318 and further processed. The further processing of the semifinished fiber product comprises a forming and / or hardening. During forming certain areas of the semifinished fiber product are warped, compressed or stretched. By further processing the semifinished fiber product, a further processed semifinished fiber product such as the further processed semifinished fiber product 300 can be produced. The fiber semifinished product angles 312 and 314 of the further processed semifinished fiber product 300 are imaged onto the winding core angles 324 and 326 before production of the semifinished fiber product which form the semifinished product angles 312, 314 from the angles 324, 326 after cutting off, removing and further processing the fiber semifinished product. The mapping of the angles can be done by the following steps:

1. Application of markings 328 on the continuous fiber of the semifinished product arranged on the element 318 in sections,

2. Determining the core core angle 324 of a section between two markings 328 with respect to the axis of rotation 320,

3. subsequent cutting, removal and further processing of the semifinished fiber product

4. Detecting the fiber semifinished product angle 314 of a section between two

Markings 328 with respect to the longitudinal axis 310,

5. Determining the deviation of the fiber semifinished product angle 314 from a desired

Semi-finished fiber angle

6. start again at step 1 and change the winding core angle 324 such that the deviation in step 5 becomes smaller,

7. Stop the iteration if the deviation is below a certain tolerance. FIG. 4 a shows a winding core 400 with a longitudinal axis 402. A carbon fiber 404 is arranged on the winding core 400. The winding core is substantially frusto-conical and has a circumference 410 at a distance 408 from the left side.

FIG. 4 b shows a boat hull 412 with a longitudinal axis 414. The hull 412 is formed from a fiber composite semifinished product mat that was previously formed on the winding core 400. The carbon fiber 404 on the winding core 400 corresponds to the carbon fiber 416 in the boat hull 412. The carbon fiber 416 runs in the hull 400 from the nose 418 to the stern lower 420 to provide high tensile strength of the boat hull 412

Provide longitudinal direction. At a distance 422 from the bow, a fuselage cross-section line 424 is defined in FIG. 4b. The distance 422 corresponds to the distance 408 and the length of

Hull cross-section line 424 corresponds to circumference 410.

By transmitting a plurality of distances and fuselage cross-sectional lengths on the winding core and forming the winding core on the basis of these dimensions, the winding core 400 is formed coextensive with the hull 412. Is on the winding core 400 a

Fiber composite semi-finished mat formed, then separated along the winding core 400, and formed to the boat hull 412, so eliminates any waste, since the boat hull 412 and the winding core 400 are the same area.

Claims

An element (212; 318; 400) for producing a semifinished fiber product, comprising:

an envelope surface defining the element (212; 318; 400) and on which

Semi-finished fiber can be formed,

characterized in that

the envelope surface is formed as a function of the surface content of a further processed semi-finished fiber product (200; 300; 412).

The element (212; 318; 400) of claim 1, wherein the envelope surface is a lateral surface about a longitudinal axis (214; 320; 402) of the element (212; 318; 400).

Element (212; 318; 400) according to claim 1 or 2, wherein the envelope surface in

Dependent on the edge shape of the further processed semi-finished fiber product (200, 300, 412) is formed.

An element (212; 318; 400) as claimed in any one of claims 1 to 3, wherein the envelope surface is coextensive with the surface content.

An element (212; 318; 400) according to any one of claims 1 to 4, wherein the skirt circumferences (ui, u ₂ , u _n ; 410) are spaced (408) along the longitudinal axis (214; 320; 402) of the element (212; 318; 400) corresponds to semifinished fiber model transverse lengths (Ii, 1 ₂ , l _n ; 402) at the same distances (208; 210; 422) along a longitudinal axis (202; 310; 414) of a semifinished fiber model.

An element according to claim 5, wherein the spacings

in regions of a curvature (204) of the further processed semi-finished fiber product or

Semi-finished fiber model transverse lengths are low (208), and

in linear regions (206) of the further processed semi-finished fiber product (210) are large.

7. A process for producing an element for producing a semi-finished fiber product comprising:

Imaging the surface content of a further processed semifinished fiber product onto an enveloping surface,

Defining the element based on the envelope surface and

Forming the element according to the envelope surface.

8. A method of making an element according to claim 7, further comprising

Depicting the envelope surface as a rotationally symmetrical lateral surface.

9. A method of producing an element according to claim 7 or 8, further comprising imaging the envelope surface in dependence on the edge shape of the further processed

Semifinished fiber.

10. A method for producing an element according to any one of claims 7 to 9, further comprising coextensive imaging of the surface content of the further processed semi-finished fiber product on the envelope surface.

1 1. A method for producing an element according to claim 7, further comprising

Determining the shape of the further processed semifinished fiber product,

Defining distances along a longitudinal axis of the semifinished fiber product present in a further processed state,

Determining semi-finished fiber cross-sections in the distances, and

Imaging the semifinished fiber cross-sections on cladding circumference of the element at intervals along a longitudinal axis of the element.

A computer program product for creating an element model (102) having a function of mapping a surface content of a semi-finished fiber model (104; 200; 300; 412) to an envelope surface defining the element model (102).

13. An apparatus for producing a semi-finished fiber product, comprising:

an element (212; 318; 400) having a longitudinal axis (214; 320; 402), fiber depositing means (108) comprising a fiber (302,304,306,308,322;

416) on the element (212; 318; 400) at a defined first angle (324, 324; 326) to the longitudinal axis (214; 320; 402) arranges to form the semi-finished fiber,

a further processing device (1 10; 1 12) for further processing the semifinished fiber product into a fiber product (104; 200; 300; 412),

characterized in that

the defined first angle (324, 326) in dependence on a second angle (312, 314) of the fiber (302, 304, 306, 308; 322; 416) in the fiber product (104; 200; 300; 412) with respect to a longitudinal axis ( 203, 310, 414) of the

Fiber product (104, 200, 300, 412).

14. An apparatus for producing a semi-finished fiber product according to claim 13, wherein the element (212; 318; 400) according to one of claims 1 to 6 is formed.

15. An apparatus for producing a semi-finished fiber product according to claim 13 or 14, wherein the Faserablegeeinrichtung (108) the fiber (302, 304, 306, 308, 416) at least partially geodetically on the element (212; 318; 400) arranges.

16. An apparatus for producing a semi-finished fiber product according to any one of claims 13 to

15, wherein the Faserablegeeinrichtung (108) has at least one degree of freedom.

17. An apparatus for producing a semi-finished fiber product according to any one of claims 13 to

16, wherein the Faserablegeeinrichtung (108) the fiber (302, 304, 306, 308, 416) in sections on the element (212; 318; 400) in the defined first angle (324, 326) to the longitudinal axis (214; 320, 402 ) of the element (212; 318; 400).

18. An apparatus for producing a semi-finished fiber product according to any one of claims 13 to

17, wherein the member (212; 318; 400) is rotatable about its longitudinal axis (214; 320; 402) and the fiber depositing means (108) is movable parallel to the longitudinal axis (214; 320; 402).

19. An apparatus for producing a semi-finished fiber product according to any one of claims 13 to

18, wherein the further processing device (1 10, 112) comprises a cutting device (1 10).

20. An apparatus for producing a semi-finished fiber product according to any one of claims 13 to 19, wherein the further processing device (1 10, 1 12) comprises a press (1 12).

21. Process for producing a semifinished fiber product, comprising:

Defining a first angle of a fiber with respect to a longitudinal axis of a fiber product,

Defining a second angle as a function of the defined first angle and

Arranging the fiber on an element for producing a semi-finished fiber to form the semi-finished fiber at the first and / or second angle with respect to a longitudinal axis of the element.

22. A method for producing a semi-finished fiber product according to claim 21, further comprising:

Feeding a matrix during or prior to placing the fiber on the element.

23. A method for producing a semi-finished fiber product according to claim 21 or 22, further comprising:

Determining the first angle of the fiber with respect to the longitudinal axis of the fiber product in sections and

Placing the fiber on the element at the second angle with respect to the longitudinal axis of the element in sections.

24. A method for producing a semi-finished fiber product according to any one of claims 21 to 23, wherein the fiber is at least partially arranged geodetically on the element.

25. A method for producing a fibrous product according to any one of claims 21 to 24, further comprising:

Cutting the formed on the element semifinished fiber and

Removing the semifinished fiber from the element.

26. A method for producing a semi-finished fiber product according to any one of claims 21 to 25, further comprising:

Pressing the semi-finished fiber product, in particular to a fiber product. A method of making a semi-finished fiber product according to claim 26, further comprising: bonding together a plurality of fiber products and / or further processed semi-finished fiber products.

A process for producing a semi-finished fiber product according to any one of claims 21 to 27, wherein the element is produced according to one of claims 7 to 1 1.

System (100) for producing a fiber product (104), comprising:

an imaging unit for imaging the surface content of a semifinished fiber model onto an enveloping surface of a winding core (102) to be produced,

a manufacturing unit for producing the winding core (212; 318; 400) on the basis of the envelope surface,

a winding unit for winding (109) the envelope surface of the winding core (212; 318; 400) with a fiber (416) at at least one defined angle (324, 326) to produce a semi-finished fiber product,

a cutting unit (110) which cuts the semifinished fiber product along the winding core (212; 318; 400),

a release agent unit which provides the cut fiber preform with release agent,

a press unit (112) which forms and cures the release-containing semi-finished fiber into a fiber product (104; 200; 300; 412), and

a laser unit (1 14), the release agent at least partially from

Fiber product (104; 200; 300; 412) ablaset !.

A system (100) for producing a fibrous product (104) according to claim 29, wherein the fiber (302, 304, 306, 308; 322; 416) is impregnated with a matrix.

A system (100) for producing a fiber product (104) according to claim 29 or 30, comprising a connection unit comprising a plurality of fiber products (104) and / or

Semi-finished fiber products (200; 300; 412) at least in sections with an adhesive (1 16) provides and interconnects.