Method for producing at least one component element for a furniture fitting

Abstract

The invention relates to a method for producing at least one component element (1) for a furniture fitting, in particular a rail, particularly preferably for a drawer pull-out guide (4), the following method steps being performed in chronological order: - a flat metal sheet (5) with a longitudinal extent (6), with two outer faces (7), and with two side faces (9) spaced apart by a width (8) of the metal sheet (5), is made available as a semi-finished item (10) of the at least one component element (1), preferably a rail, - the metal sheet (5) is provided, preferably by at least one stamping punch and / or at least one stamping roll (12), with at least one notch (13) on at least one outer face (7), wherein the at least one notch (13) is arranged substantially parallel to the longitudinal extent (6), - the metal sheet (5) is mechanically separated in the region of the at least one notch (13), preferably being broken off, particularly preferably kinked and divided, - the separated metal sheet (5) is bent such that, in a cross section (14) orthogonal to the longitudinal extent (6), a profile (15) of the at least one component element (1), preferably a rail, is obtained.

Description

[0001] Method for producing at least one component for a furniture fitting

[0002] The invention relates to a method for producing at least one component for a furniture fitting, in particular a rail, particularly preferably for a drawer slide. Furthermore, the invention relates to a drawer slide for the movable mounting of a drawer on a furniture body according to the preamble of claim 13.

[0003] A general problem in the production of components such as rails, particularly for the furniture industry, is the need for metal, which is necessary for the production of one of the rails or the like. High material usage leads to high weight and increased costs in serial production. It is therefore desirable to use as little metal as possible, especially since resource-efficient use of raw materials brings both ecological and economic advantages.

[0004] One measure for saving metal is the use of thin-walled metal sheets, which also advantageously reduces the weight of the rail. In the prior art, rails, particularly for the furniture industry, are usually cut to length using a separating cut – for example, using a saw blade of a defined width – so that a rail with defined dimensions is generated. However, this creates a high level of metal as a waste product, and there has been a long-standing need in the furniture industry to save materials by preventing this type of metal scrap. A method for producing tubes and extruded profiles is already known from the document DE 10 2007 018 927 A1, wherein bevels in the tubes or extruded profiles are used to minimize the risk of injury and the degree of deformation after a cutting process step, without generating scrap.

[0005] A disadvantage of the current state of the art is that only semi-finished products are used as such for further transport. However, the pipes and extruded profiles must subsequently be adapted to the respective requirements, and the structural design of the semi-finished products is determined by the primary forming process. However, there is no process for a specific application area with defined tasks, individual purposes, structural designs, and specific challenges.

[0006] To further reduce material waste, attempts are made to position cut edges very close to one another during a punching process or to arrange them so that they overlap relative to one another, so that, for example, the geometry of the strip-shaped semi-finished product can be optimally utilized for a rail. However, this also results in sharp-edged longitudinal surfaces in the subsequently bent profile of the rail, which increases the risk of injury during use and requires complex post-processing steps or special protective devices to reduce the risk of injury.

[0007] The objective technical object of the present invention is therefore to provide a method for producing at least one component for a furniture fitting and an improved drawer pull-out guide which is improved compared to the prior art and in which the disadvantages of the prior art are at least partially eliminated and which are characterized in particular by a reduction in metal waste during the production of components for a furniture fitting and a reduced risk of injury when using the produced component.

[0008] This problem is solved by the features of claim 1.

[0009] It is therefore provided according to the invention that the following method steps are carried out in chronological order: a flat sheet with a longitudinal extent, two cover surfaces and two side surfaces spaced apart by a width of the sheet is provided as a semi-finished product of the at least one component, preferably a rail, the sheet is provided with at least one notch on at least one cover surface, preferably by at least one embossing die and / or at least one embossing roller, the at least one notch being arranged substantially parallel to the longitudinal extent, the sheet is mechanically separated in the region of the at least one notch, preferably broken off, particularly preferably folded and divided, the separated sheet is bent so that a profile of the at least one component, preferably a rail, is created in a cross-section orthogonal to the longitudinal extent.

[0010] This makes it possible to effectively prevent material waste, which occurs with conventional components such as rails or similar in the furniture industry due to the machining process of separating the rail from a profile material. This is associated with reduced disposal and / or recycling costs for metal scrap in mass production, cleaner component parts and a cleaner processing environment, less post-processing work and significant cost savings in production, since processing steps as well as punching waste or separation waste - due, for example, to the cutting width of a separating tool - are accumulated with each manufactured component.

[0011] In addition, a longitudinal surface of the profile can be automatically generated at the same time which has a taper and is so burr-free (due to plastic deformation) that the risk of injury when the component is used in furniture can be significantly reduced. In general, only one of the longitudinal surfaces can be machined in this way before bending, for example in order to be able to use the width of the raw material efficiently, or both longitudinal surfaces can be provided with a notch so that the component remains on the component during breaking off, separating, stripping, etc. In general, the taper can also be removed in a subsequent process step.

[0012] The sheet metal is preferably in the form of steel sheet metal. However, in the context of the invention, the term "sheet metal" is to be interpreted broadly so that other non-metallic plate-shaped materials—such as plastic plates, composite material plates, or the like—can also be considered as sheet metal in non-metallic form. The sheet metal is particularly preferably metallic.

[0013] Mechanical separation such as breaking, bending or splitting without the aid of cutting tools such as saw blades or punching tools is fundamentally an unusual measure in automated production in the furniture industry and especially for component parts such as rails, particularly since there has been a meticulous effort to date to minimize the impact on the complex geometric designs of rails or the like - primarily due to great material thicknesses and large cross-sectional diameters of the profiles, coupled with high demands on geometric accuracy and precision of the profile - by using machining processes. This can also be ensured according to the invention, wherein the geometry of the profile of at least one component is precisely maintained in the cross-section and over the longitudinal extent.

[0014] Particularly lightweight components with a low wall thickness can be manufactured particularly cost-effectively with little effort and low plastic deformation using the process, while also ensuring a highly aesthetically pleasing appearance of the component.

[0015] If the sheet metal (for example, in the form of flat steel) is profiled via notches prior to a bending process, complex geometries are also possible during the bending process to form the at least one component, wherein the at least one notch follows the complex geometry of the profile of the at least one component in order to be able to mass-produce component components particularly efficiently. The profile of the at least one component is not undesirably impaired by the at least one notch, in particular due to its introduction prior to the bending process.

[0016] The technical term mechanical cutting refers to all cutting processes that do not generate any material waste, for example through cutting processes.

[0017] The component can be, for example, a rail such as a

[0018] Carcass rail or a drawer rail, in particular for a drawer pull-out guide as a furniture fitting, or a hinge arm, an adjusting arm, a hinge part, a housing part or the like for a flap fitting or other furniture fitting, such as a hinge.

[0019] Another positive feature is that the at least one component represents a lower risk of injury for a furniture user and / or an assembler during installation due to the lack of a burr - caused by a machining separation process - and no reworking is required. In addition, cutting tools, for example, have a limited service life due to wear and tear, whereby maintenance and / or repair work in the mass production of components can be significantly reduced. The transverse expansion in width (and generally also the longitudinal expansion) of the at least one component can be flexibly adjusted via the positioning of the at least one notch, whereby the sheet metal does not have to be available in advance with the appropriate width dimensions (or length dimensions).

[0020] The at least one component can be, for example, a furniture rail, a carcass rail, a middle rail (preferably located at least partially between the carcass rail and the drawer rail), a drawer rail, a container rail (preferably for arranging a drawer on the container rail), etc. By work hardening in a cut-free, chip-free and preferably burr-free mechanical breaking process, the at least one notch can act as a predetermined breaking point, whereby particularly favorable material characteristics of the component are achieved in an area around the at least one notch.

[0021] The breaking off process of the component can be carried out by means of cutting tools without a cutting edge, such as a ram or the like, or manually. A semi-automatic or automatic hydraulic or pneumatic drive is particularly preferably used to remove the at least one component from a remaining material by pressure and / or tension (for example by pulling apart), whereby no punching tool, saw or grinding wheel (with certain burrs and post-processing steps) is required. The at least one notch can act as a defined breaking off edge to form the at least one component under bending stress, whereby the tensile / compressive loads are focused on the at least one notch.

[0022] The at least one notch can be introduced into the sheet metal in strip form, for example, using an embossing die such as a notching die or an embossing roller such as a notching roller. Generally, after mechanical separation (breaking off), a taper in the form of at least one chamfer is arranged on an end face of the profile of the component. Preferably, the at least one notch comprises two flanks, wherein, after the breaking-off process, one flank is assigned to the at least one component.

[0023] As stated at the outset, protection is also sought for a drawer pull-out guide for the movable mounting of a drawer on a furniture carcass, comprising at least one carcass rail to be fastened to the furniture carcass and at least one drawer rail to be connected to the drawer, which is mounted displaceably in a longitudinal direction relative to the at least one carcass rail, and optionally at least one central rail, which is arranged at least partially between the at least one carcass rail and the at least one drawer rail, and optionally at least one container rail for arrangement on the at least one drawer rail and / or on the drawer, wherein the at least one carcass rail and / or the at least one drawer rail has a profile formed from at least one flat sheet in a cross-section orthogonal to the longitudinal direction, characterized in thatthat the at least one carcass rail and / or the at least one drawer rail and / or the at least one optionally present middle rail and / or the at least one optionally present container rail is manufactured as a component by such a method, so that at least one, in particular two, longitudinal surface of the profile of the at least one carcass rail and / or the at least one drawer rail and / or the at least one optionally present middle rail and / or the at least one optionally present container rail is formed with a taper.,

[0024] However, the method can be used for other furniture fittings besides drawer slides.

[0025] The method can be used to generate a taper on at least one longitudinal surface of the profile. A center rail is not absolutely necessary, but can ensure full extension of the drawer relative to the furniture carcass and act as an intermediate link between a carcass rail and a drawer rail. A container rail is not absolutely necessary, but can, for example, in the case of a preferably metallic drawer frame, act as a link between a side wall of the drawer or a container and a drawer rail, wherein the container rail is preferably connected to a frame cap in a material-fit manner or by means of a collar and to the drawer extension guide by vertical support on the drawer rail. The longitudinal direction is generally identical to the longitudinal extent of the sheet metal.Particularly preferably, the taper extends over the entire profile of the at least one component in the longitudinal surface (and optionally in the end surface or the end surfaces).

[0026] Advantageous embodiments of the invention are defined in the dependent claims.

[0027] According to an advantageous embodiment of the invention, it is provided that at least two opposing notches are arranged on the two cover surfaces of the sheet, preferably lying one above the other in a direction orthogonal to at least one of the two cover surfaces.

[0028] By means of superimposed notches, a particularly symmetrical longitudinal surface (or end surface) of the component can be generated, whereby opposite and / or adjacent notches can generally have different depths and / or notch geometries.

[0029] Advantageously, it is provided that the bent sheet is mechanically separated, preferably broken off, particularly preferably bent and divided, at at least two, preferably at least two superimposed, notches.

[0030] In general, however, it is also conceivable to use only one notch for the mechanical separation process.

[0031] It has proven advantageous that the at least one component is formed with a substantially burr-free taper on at least one, preferably two, longitudinal surfaces of the profile, wherein it is preferably provided that the taper has a taper cross-section orthogonal to the longitudinal extent of the sheet metal substantially in the form of a, preferably isosceles, triangle, wherein the taper cross-section is particularly preferably convex and / or concave.

[0032] The taper is generally achieved by a combination of work hardening by the introduction of at least one notch and plastic deformation in the mechanical separation process step and generally extends over the entire longitudinal surface (or end surface) of the profile, the longitudinal surface constituting a side surface of the underlying sheet in the folded state of the profile.

[0033] According to an advantageous embodiment of the invention, it is provided that the sheet metal is broken in the region of the at least one notch without cutting, punching and waste, wherein the at least one notch is used as a predetermined breaking point during buckling or separating of the sheet metal, wherein it is preferably provided that the at least one component is formed without post-processing.

[0034] The type and method of mechanical separation is generally arbitrary, whereby no chip waste is produced during mechanical separation and, if necessary, subsequent machining can be provided - however, this is not absolutely necessary in order to be able to use at least one component directly, for example, as a furniture rail without a high risk of injury.

[0035] It has proven advantageous that the sheet has a wall thickness in the range of 0.5 mm and 1.8 mm, preferably between 0.6 mm and 0.8 mm.

[0036] The wall thickness of less than 1.8 mm - which is used for conventional components such as rails - results in a particularly light component which can be mechanically separated particularly favorably by the method according to the invention and which has a low material consumption.

[0037] An advantageous variant of the present invention consists in that the sheet metal is folded in the region of at least one longitudinal surface to form a fold, preferably during the bending of the sheet metal.

[0038] By means of a fold, a wall thickness can be doubled locally in order to increase strength and / or stability properties in desired areas of the component without doubling the weight of the component itself.

[0039] It is particularly preferred that the at least one notch is introduced into the sheet in the form of a groove or a profiling with an opening angle in the range between 40 ° and 140 ° , preferably between 75 ° and 105 ° , particularly preferably substantially 90 ° .

[0040] For example, identical or different depths and / or geometries can be used for the at least one notch in order to act as a defined predetermined breaking point for tearing and / or breaking off.

[0041] In one embodiment of the invention, it is provided that the at least one notch has a notch cross-section orthogonal to the longitudinal extent of the sheet in the form of a triangle, a trapezoid, an ellipse segment and / or a circle segment.

[0042] Particularly preferably, the at least one notch is formed after the bending process to the profile of the sheet such that between 0.05 mm and 0.2 mm, preferably between 0.08 mm and 0.12 mm, remain between the two cover surfaces. Particularly preferably, the at least one notch has a trapezoidal shape, wherein the smallest side length of the trapezoid between the two cover surfaces is between 0.1 mm and 0.4 mm, preferably between 0.15 mm and 0.25 mm.

[0043] According to a preferred embodiment of the invention, it is provided that for each component part, exactly two or four notches arranged in pairs on the two cover surfaces are introduced into the flat sheet metal parallel to the longitudinal extent, wherein the component part is formed by breaking off once or twice, preferably consecutively, over the two or four notches of the sheet metal.

[0044] This can both promote the mechanical separation process and maximize material savings.

[0045] It has proven advantageous to provide the sheet with a large number of notches arranged in pairs on the two cover surfaces and then to mechanically break off a large number of component parts.

[0046] This allows a large number of components to be manufactured in series in a time-efficient manner and preferably without interruption using one and the same semi-finished product.

[0047] It is particularly preferably provided that at least one further notch is arranged in the sheet metal transversely, preferably substantially parallel, to the longitudinal extent, wherein it is preferably provided that the, particularly preferably bent, sheet metal is mechanically separated, particularly preferably broken off or bent and divided, in the region of the at least one further notch to form at least one substantially burr-free further taper on at least one end surface of the component.

[0048] If, for example, both longitudinal surfaces and both end surfaces of a rail are each generated via a notch or further notch (so that in general there are four connected and / or adjacent tapers along the contour of the rail), a reduction in material waste and the risk of injury can be ensured to a particularly high degree.

[0049] Preferably, at least one, in particular two, end surfaces of the profile of the at least one carcass rail and / or the at least one drawer rail and / or the at least one optionally present central rail and / or the at least one optionally present container rail are formed with a further taper.

[0050] Furthermore, it is preferably provided that the taper and / or the further taper comprises an angle in the range between 60° and 140°, preferably between 75° and 105°, particularly preferably substantially 90°, wherein it is preferably provided that at least one, preferably both, longitudinal surface and / or end surface are designed to be substantially burr-free.

[0051] The geometry of the taper can be flexibly adjusted via the geometry of at least one notch.

[0052] In a further embodiment, it can be provided that the at least one carcass rail and / or the at least one drawer rail has at least one fastening section with a fastening side which, when mounted on the furniture carcass or at least one furniture part, can be brought to rest at least in sections on the furniture carcass or the at least one furniture part, wherein the at least one fastening section has at least one, preferably circular,

[0053] Opening for the passage of a fastening means, preferably a screw, wherein the at least one opening on a second side spaced apart from the fastening side by a material thickness of the fastening section, preferably between 0.5 mm and 1.8 mm, particularly preferably between 0.6 mm and 0.8 mm, is surrounded by a bead which projects transversely from the second side.

[0054] The bead reinforces the peripheral edge of the opening, distributing the force exerted by the underside of a screw head over a larger area. The bead prevents the screw head from sinking into the thin-walled metal of the fastening section. This reduces the risk of damage to the peripheral edge of the opening, and saves material.

[0055] According to an advantageous embodiment of the invention, it is provided that the at least one carcass rail and / or the at least one drawer rail and / or the at least one optionally present central rail and / or the at least one optionally present container rail is folded into a fold in the region of at least one profile surface of the profile.

[0056] The fold z can increase the ratio of the load capacity of the rail or another component to the weight of the rail / component.

[0057] It is particularly preferably provided that the at least one taper and / or the at least one further taper has a taper cross-section parallel and / or orthogonal to the longitudinal extent of the sheet, substantially in the form of a, preferably isosceles, triangle, wherein it is preferably provided that the taper cross-section is convex and / or concave.

[0058] According to a preferred embodiment, it is provided that the profile has at least one embossing, preferably oriented orthogonally to the longitudinal extent of the sheet, for stiffening the profile, wherein it is preferably provided that the at least one embossing extends over at least two substantially orthogonal profile surfaces and / or at least two embossings are provided which are arranged alternately in the direction of an inner region and in the direction of an outer region of the profile.

[0059] The at least one embossing promotes the stability and / or strength of the at least one component with particularly efficient material requirements.

[0060] Further details and advantages of the present invention are explained in more detail below with reference to the exemplary embodiments shown in the drawings.

[0061] Fig. 1a, 1b a drawer pull-out guide according to a particularly preferred embodiment comprising a carcass rail and a drawer rail as well as the drawer rail isolated in a perspective view,

[0062] Fig. 2a-2f Process steps in a preferred method for producing a rail for drawer slides according to the embodiment of Fig. 1a,

[0063] Fig. 3 chronological stages in the course of a preferred

[0064] Method for producing a rail according to the embodiment of Fig. 1b,

[0065] Fig. 4a-4c schematic illustration of a mechanical separation at notches of a sheet metal, Fig. 5a-5f, a preferred method comprising introduction of notches, mechanical separation and generation of tapers on longitudinal surfaces of a component to be formed for a furniture fitting,

[0066] Fig. 6 is a schematic representation of a preferred

[0067] Method for producing a rail, wherein additional notches are used transversely to a longitudinal extension.

[0068] Fig. 1a shows a drawer pull-out guide 4 for the movable mounting of a drawer on a furniture carcass, comprising a carcass rail 2 to be fastened to the furniture carcass and a drawer rail 3 to be connected to the drawer, which is mounted displaceably relative to the carcass rail 2 in a longitudinal direction 30. The carcass rail 2 and the drawer rail 3 have a profile 15 formed from flat sheet metal 5 in a cross-section 14 orthogonal to the longitudinal direction 30.

[0069] The carcass rail 2 and the drawer rail 3 are manufactured as component parts 1 in such a way that at least one (generally both) longitudinal surface 51 of the profile 15 of the carcass rail 2 or the drawer rail 3 is formed with a taper 16, the process steps for forming the tapers 16 being explained in detail in Figures 2a to 5f.

[0070] The carcass rail 2 has a fastening section 32 with a fastening side 33 which, when mounted on a furniture carcass, can be brought into contact with the furniture carcass, the fastening section 32 having circular openings 35 for the passage of fastening means, such as screws. The openings 35 are surrounded on a second side 38, which is spaced apart by a material thickness of the fastening section 32 of between 0.5 mm and 1.8 mm, by a bead 39 which projects transversely from the second side 38. The profile 15 of the carcass rail 2 comprises embossments 41 oriented orthogonally to the longitudinal extent 6 of the sheet metal 5 for stiffening the profile 5, wherein the drawer rail 3 can generally also have embossments 41 for increasing stability - for example extending over two orthogonally adjacent profile surfaces.The embossments 41 of the body rail are arranged alternately in the direction of an inner area 42 and in the direction of an outer area 43 of the profile 15.

[0071] Fig. 1b differs from Fig. 1a only in that the drawer rail 3 is shown in the disassembled state. The drawer rail has two longitudinal surfaces 51 and two end surfaces 17 of the profile 15. Further tapers 52 can generally be arranged on the end surfaces 17. According to the invention, a taper 16 is arranged on at least one of the two longitudinal surfaces 51, which is caused by a notch 13 which was arranged parallel to the longitudinal extent 6 during the production process.

[0072] Fig. 2a shows the introduction of the notches 13, which are arranged on the outside of the sheet 5. The enlarged detail shows that three notches 13 were arranged parallel to the longitudinal direction 30 via embossing rollers 12 (or generally embossing dies in the sense of a notch). Material for five rails can be cut from the width 8 of the sheet 5.

[0073] Fig. 2b shows the geometry of the notch shape on an enlarged scale, wherein the notch 13 is in the form of a groove 22 comprising a rounded profile 23 with an opening angle 24 in the range between 75° and 105° in the sheet 5. The notches 13 have a notch cross-section 25 orthogonal to the longitudinal extent 6 of the sheet 5 in the form of a triangle 19, wherein the shape is generally arbitrary and can be designed, for example, as a trapezoid, elliptical segment or circular segment.

[0074] Fig. 2c shows a rolling device for processing semi-finished products or raw materials for the production of rails, wherein two embossing rollers 12 arranged parallel to one another and orthogonal to the longitudinal direction 30 and the longitudinal extension 6 ensure the introduction of the notches 13.

[0075] The enlarged detail shows one of two additional rollers arranged orthogonally to the embossing rollers 12 and intended for rounding the outer edges. This rounding processing step can be omitted for longitudinal surfaces 51 formed by notches 13 and thus having tapered portions 16.

[0076] Fig. 2d shows the rolling device according to Fig. 2c in a view from the front, wherein the sheet 5 is continuously passed between the embossing rollers 12.

[0077] With reference to Fig. 2e, in which the embossing rollers 12 on the sheet 5 are shown in simplified form, a method for producing a component 1 for a furniture fitting in the form of a rail for mounting on a drawer pull-out guide 4 can be explained by way of example: A flat sheet 5 (usually sheet steel, although aluminum sheets or plastic-like plates are also possible) with a longitudinal extension 6, two cover surfaces 7 and two side surfaces 9 spaced apart by a width 8 of the sheet 5 is provided as a semi-finished product 10 or raw material for the rail. The sheet 5 is then provided with notches 13 on both cover surfaces 7 by the two embossing rollers 12, the notches 13 being arranged parallel to the longitudinal extension 6 (or the longitudinal direction 30).Chronologically following this, the sheet metal 5 is mechanically separated in the area of ​​the notch 13 (without chipping), whereby the sheet metal parts are broken off, for example, by bending and splitting or by pulling relative to one another.

[0078] The separated sheet 5 is subsequently bent to create a profile 15 of the component 1 (in this exemplary embodiment, a rail) in a cross-section 14 orthogonal to the longitudinal extension 6. Before or after the bending process, the sheet 5 / profile 15 can be provided with punchings or profiling.

[0079] Fig. 2 f shows the notched sheet material before mechanical separation in a perspective view, a view from the front and with an enlarged detail in the area of ​​the cross section of the notch 13.

[0080] Fig. 3 illustrates different stages in a preferred manufacturing process for the component parts in press production, wherein the sheet metal 5 is profiled and punched and divided into segments by plastic (non-cutting) deformation in order to bend a plurality of rails. The segmentation takes place orthogonally to the longitudinal extent 6 and in the direction of the longitudinal extent 6, wherein, in general, machining processes can also be provided for separating the segments in the longitudinal direction 30 of the sheet metal 5.

[0081] The sheet metal 5 was provided with a plurality of notches 13 (and further notches 50) arranged in pairs on the two cover surfaces 7 in order to subsequently be able to mechanically break off a plurality of component parts 1 which, in general, still have to be bent.

[0082] Fig . 4a to 4c illustrate the mechanical separation process ( transverse to the longitudinal extension 6 ) using the example of individual rails using breaking tools in the form of clamps .

[0083] In Fig. 4a, the clamps are moved towards each other so that the sheet 5 with the notches 13 is clamped between the clamps, this state being visible in Fig. 4b.

[0084] In Fig. 4c, pairs of clamps are displaced relative to adjacent pairs of clamps, so that the sheet metal is mechanically divided via the notches 13 as a predetermined breaking point. The rails are thus separated from the semi-finished tool by breaking, although bending or buckling operations can generally also be provided for the mechanical division (cf. Fig. 6).

[0085] In the perspective view in Fig. 5a as well as the side view in Fig. 5b with the associated detail section, the notches 13 are visible, which are introduced into the raw material by plastic deformation in order to be able to generate a division transverse to the profiling direction.

[0086] If the notched sheet material is plastically deformed according to Fig. 5c, the sheet 5 is segmented along the contours defined by the notches 13, this situation being shown schematically in Fig. 5d: After mechanical separation, four sheet metal parts are present which can be used to manufacture component parts 1, wherein the outer segments will be present with a burr-free taper 16 on a longitudinal surface 51 on the profile 15 to be bent and the two inner segments can be used for profiles 15 with tapers 16 formed on two longitudinal surfaces 51.

[0087] In Fig. 5e, the mechanical division of the sheet 5 via the notches 13 transverse to the longitudinal extent 6 has already taken place. Fig. 5f shows a view in the longitudinal direction 30 of one of the segments, wherein it can be seen that the tapers 16 each have a tapered cross-section 18 orthogonal to the longitudinal extent 6 of the sheet 5 in the form of a triangle 19. The tapered cross-sections 18 are convex in some areas and concave in some areas, wherein the contour of the tapered cross-section 18 can be influenced, for example, by the type of cutting process (a purely convex shape could be achieved, for example, by blunt tearing).

[0088] Using the example of the component 1, which can be formed according to Fig. 5f, exactly four notches 13 arranged in pairs on the two cover surfaces 7 were introduced into the flat sheet 5 parallel to the longitudinal extent 6, wherein the component 1 can be formed by twice successive breaking off over the four notches 13 of the sheet 5 (and subsequent bending).

[0089] On the two cover surfaces 7 of the sheet 5, a plurality of two opposing notches 13 were arranged one above the other in a direction orthogonal to one of the two cover surfaces 7. The sheet 5 was mechanically separated at two superimposed notches 13. The separation process can be carried out by tensile and / or compressive stress.

[0090] The tapers 16 (and the further tapers 52 shown in Fig. 6) each enclose an angle 31 in the range between 75° and 105° with respect to one another. Both longitudinal surfaces 51 (or end surface 17 according to Fig. 6) are essentially burr-free to prevent damage during use, although in general only one longitudinal surface 51 (or end surface 17) can be machined in this way.

[0091] The sheet metal 5 was broken or divided in the area of ​​the notches 13 without cutting, punching and cutting, wherein the notches 13 were used as a predetermined breaking point during buckling or separating of the sheet metal 5, so that a component 1 could be generated for which no machining step (necessary for safety reasons) is required.

[0092] The sheet 5 has a wall thickness 20 of 0.7 mm, with wall thicknesses in the range between 0.5 mm and 1.8 mm being preferred.

[0093] Fig. 6 shows a component 1 in the form of a drawer rail 3, wherein the sheet 5 was folded in the region of the two longitudinal surfaces 51 to form a fold 21 during the bending of the sheet 5 to form the profile 15.

[0094] In this component 1, in addition to the notches 13 and tapers 16, a further notch 50 was arranged in the sheet metal 5 parallel to the longitudinal extent 6. The sheet metal 5 can be mechanically separated in the bent state or in the unbent state in the region of this further notch 50 to form a substantially burr-free further taper 52 on an end surface 17 of the component 1. Here, too, the separation process can be carried out, for example, by splitting or bending.

[0095] One of the two end surfaces 17 of the profile 15 is formed with a further taper 52, wherein in general further tapers 52 can also be provided on both end surfaces 17. The tapered cross section 18 of the further tapers 52 is

[0096] (analogous to the tapers 16) in the form of a convex triangle 19, whereby the geometry of the further tapers 52 in

[0097] Generally, this is arbitrary and can be influenced by the further notches 50 and depending on the mechanical separation process.

Claims

Patent claims Method for producing at least one component (1) for a furniture fitting, in particular a rail, particularly preferably for a drawer pull-out guide (4), characterized by the following method steps to be carried out in chronological order: a flat sheet (5) with a longitudinal extension (6), two cover surfaces (7) and two side surfaces (9) spaced apart by a width (8) of the sheet (5) is provided as a semi-finished product (10) of the at least one component (1), preferably a rail, the sheet (5) is stamped, preferably by at least one stamping die and / or at least one stamping roller (12), on at least one cover surface (7) with at least one notch (13), wherein the at least one Notch (13) substantially parallel to the longitudinal extension (6), the sheet metal (5) is mechanically separated, preferably broken off, particularly preferably kinked and divided in the region of the at least one notch (13), the separated sheet metal (5) is bent so that a profile (15) of the at least one component part (1), preferably a rail, is created in a cross-section (14) orthogonal to the longitudinal extension (6). Method according to claim 1, wherein the at least one component part (1) is formed with a substantially burr-free taper (16) on at least one, preferably two, longitudinal surfaces (51) of the profile (15), wherein it is preferably provided that the taper (16) has a taper cross-section (18) orthogonal to the longitudinal extension (6) of the sheet metal (5) substantially in the shape of a, preferably isosceles, triangle (19), wherein the taper cross-section (18) is particularly preferably convex and / or concave. Method according to claim 1 or 2, wherein on the two cover surfaces (7) of the sheet (5) at least two opposing notches (13), preferably lying one above the other in a direction orthogonal to at least one of the two cover surfaces (7), are arranged. Method according to one of the preceding claims, wherein the sheet (5) is mechanically separated, preferably broken off, particularly preferably bent and divided at at least two, preferably at least two superimposed, notches (13). Method according to one of the preceding claims, wherein the sheet metal (5) is broken in the region of the at least one notch (13) without cutting cuts, without punching and without cutting, wherein the at least one notch (13) is used as a predetermined breaking point during bending or separating of the sheet metal (5), wherein it is preferably provided that the at least one component (1) is formed without post-processing. Method according to one of the preceding claims, wherein the sheet metal (5) has a wall thickness (20) in the range of 0.5 mm and 1.8 mm, preferably between 0.6 mm and 0.8 mm. Method according to one of the preceding claims, wherein the sheet metal (5) is folded in the region of at least one longitudinal surface (51) to form a fold (21), preferably during the bending of the sheet metal (5).Method according to one of the preceding claims, wherein the at least one notch (13) is introduced into the sheet metal (5) in the form of a groove (22) or a profiling (23) with an opening angle (24) in the range between 40° and 140°, preferably between 75° and 105°, particularly preferably substantially 90°. Method according to one of the preceding claims, wherein the at least one notch (13) has a notch cross-section (25). orthogonal to the longitudinal extension (6) of the sheet (5) in the form of a triangle (19), a trapezoid, an ellipse segment and / or a circle segment.

10. Method according to one of the preceding claims, wherein for each component (1) exactly two or four notches (13) arranged in pairs on the two cover surfaces (7) are introduced into the flat sheet (5) parallel to the longitudinal extent (6), wherein the component (1) is formed by breaking off once or twice, preferably consecutively, over the two or four notches (13) of the sheet (5).

11. Method according to one of the preceding claims, wherein the sheet metal (5) is provided with a plurality of notches (13) arranged in pairs on the two cover surfaces (7) and subsequently a plurality of component parts (1) are mechanically broken off.

12. Method according to one of the preceding claims, wherein at least one further notch (50) is arranged in the sheet metal (5) transversely, preferably substantially parallel, to the longitudinal extent (6), wherein it is preferably provided that the, particularly preferably bent, sheet metal (5) is mechanically separated, particularly preferably broken off or bent and divided, in the region of the at least one further notch (50) to form at least one substantially burr-free further taper (52) on at least one end surface (17) of the component (1).

13. Drawer pull-out guide (4) for the movable mounting of a drawer on a furniture body, comprising at least one to be fastened to the furniture body Carcass rail (2) and at least one drawer rail (3) to be connected to the drawer, which is mounted displaceably in a longitudinal direction (30) relative to the at least one carcass rail (2), and optionally at least one middle rail, which is arranged at least partially between the at least one Carcass rail (2) and the at least one drawer rail (3), and optionally at least one container rail for arrangement on the at least one drawer rail (3) and / or on the drawer, wherein the at least one carcass rail (2) and / or the at least one drawer rail (3) has a profile (15) formed from at least one flat sheet (5) in a cross-section (14) orthogonal to the longitudinal direction (30), characterized in that the at least one carcass rail (2) and / or the at least one drawer rail (3) and / or the at least one optionally present central rail and / or the at least one optionally present container rail is produced as a component (1) by a method according to one of the preceding claims, so that at least one, in particular two,The longitudinal surface (51) of the profile (15) of the at least one carcass rail (2) and / or the at least one drawer rail (3) and / or the at least one optionally present central rail and / or the at least one optionally present container rail is formed with a taper (16). Drawer pull-out guide (4) according to claim 13, wherein at least one, in particular two, end surfaces (17) of the profile (15) of the at least one carcass rail (2) and / or the at least one drawer rail (3) and / or the at least one optionally present central rail and / or the at least one optionally present container rail are formed with a further taper (52). Drawer pull-out guide (4) according to claim 13 or 14, wherein the taper (16) and / or the further taper (52) comprises an angle (31) in the range between 60° and 140°, preferably between 75° and 105°, particularly preferably substantially 90°, wherein it is preferably providedthat at least one, preferably both, longitudinal surface (51) and / or end surface (17) are substantially burr-free., Drawer pull-out guide (4) according to one of claims 13 to 15, wherein the at least one carcass rail (2) and / or the at least one drawer rail (3) has at least one fastening section (32) with a fastening side (33) which, when mounted on the furniture carcass or at least one furniture part, can be brought into contact with the furniture carcass or the at least one furniture part, at least in sections, wherein the at least one fastening section (32) has at least one, preferably circular, opening (35) for the passage of a fastening means, preferably a screw, wherein the at least one opening (35) is surrounded on a second side (38) spaced from the fastening side (33) by a material thickness of the fastening section (32), preferably between 0.5 mm and 1.8 mm, particularly preferably between 0.6 mm and 0.8 mm, by a bead (39) which projects transversely from the second side (38).Drawer pull-out guide (4) according to one of claims 13 to 16, wherein the at least one carcass rail (2) and / or the at least one drawer rail (3) and / or the at least one optionally present central rail and / or the at least one optionally present container rail is folded into a fold (21) in the region of at least one profile surface (40) of the profile (15). Drawer pull-out guide (4) according to one of claims 13 to 17, wherein the at least one taper (16) and / or the at least one further taper (52) has a taper cross-section (18) parallel and / or orthogonal to the longitudinal extent (6) of the sheet metal (5) substantially in the shape of a, preferably isosceles, triangle (19), wherein it is preferably provided that the taper cross-section (18) is convex and / or concave.Drawer pull-out guide (4) according to one of claims 13 to 18, wherein the profile (15) has at least one embossed portion (41), preferably oriented orthogonally to the longitudinal extent (6) of the sheet (5), for stiffening the profile (5), wherein it is preferably provided that the at least one embossed portion (41) extends over. at least two substantially orthogonal profile surfaces (40) and / or at least two embossments (41) are provided, which are arranged alternately in the direction of an inner region (42) and in the direction of an outer region (43) of the profile (15).

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