Method for manufacturing at least one member component for a furniture fitting - Patent application

Abstract

A method for manufacturing at least one component (1) for furniture fittings, in particular a rail for a drawer guide (4) for a drawer, comprising the following method steps: - preparing a flat sheet metal (5) with one longitudinal extension (6), two cover surfaces (7) and two side surfaces (9) spaced apart by the width (8) of the sheet metal (5) as a semi-finished product (10) of the at least one component (1), preferably a rail; - embossing the sheet metal (5) preferably by means of at least one embossing punch and / or at least one embossing roller (12). a method for forming at least one cut (13) in at least one cover surface (7) of a sheet metal member (1), the at least one cut (13) being arranged substantially parallel to the longitudinal direction (6); a method for mechanically separating, preferably by folding and breaking, particularly preferably by folding and splitting, the sheet metal member (5) in the region of the at least one cut (13); and a method for bending the separated sheet metal member (5) to thereby form, in a cross section (14) perpendicular to the longitudinal direction (6), at least one profile (15) of a rail.

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing at least one component for a furniture fitting, in particular a rail for a drawer guide, particularly preferably for a drawer. The present invention further relates to a drawer guide for a drawer for movably supporting a drawer in a furniture cabinet, according to the preamble of claim 13.

[0002] A common problem in the manufacture of components such as rails, especially for the furniture industry or furniture sector, is the amount of metal required to manufacture rails or the like. The use of more material increases the weight and increases the costs in mass production. Therefore, it is desirable to use as little metal as possible, and the use of raw materials that are easy to recycle offers ecological and economic benefits.

[0003] One way to save metal is to use thin-walled sheet metal, which also advantageously reduces the weight of the rail. In the prior art, rails, especially for the furniture industry, are usually cut into short pieces with a defined width by means of a saw, for example, to produce rails of defined dimensions. However, this generates a large amount of metal as waste, and there has long been a need in the furniture industry to save material by suppressing such metal waste.

[0004] A method for producing tubes and extrusion press profiles is already known from DE 10 2007 018 927 A1, in which a chamfer is used in the tube or extrusion press profile, which makes it possible to minimize the risk of injury and the degree of deformation after the separation process step without generating any separation waste.

[0005] A drawback of the prior art is that the semi-finished product itself is used solely for further transport of the semi-finished product, but the tube and extrusion press profile must then be adapted to the respective field of demand, and the structural configuration of the semi-finished product is determined by the primary deformation process, whereas no method is provided for specific fields of demand with defined tasks, individual objectives, structural configurations and special challenges.

[0006] In order to further reduce the material waste, attempts have been made to position the cutting edges for the punching process very close to one another or to arrange them so that they overlap relative to one another, thereby making it possible to utilize the optimum geometry of the strip-shaped semi-finished product, for example for a rail. However, this still results in sharp longitudinal edges in the subsequently bent profile of the rail, which increases the risk of injury during use, and requires complex post-processing steps or separate protective devices to reduce the risk of injury.

[0007] The technical problem addressed by the present invention is therefore to provide an improved method for manufacturing at least one component for furniture fittings, and an improved drawer guide for a drawer, which method and drawer guide for a drawer are superior to the prior art, in that the drawbacks of the prior art are at least partially overcome and which are distinguished in particular by a reduction in metal waste during the manufacture of the component for furniture fittings and a reduction in the risk of injury when using the manufactured component.

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

[0009] Thus, according to the invention, the following method steps are performed: - providing a flat sheet metal with a longitudinal extension, two cover sides and two side faces spaced apart by the width of the sheet metal as at least one component, preferably a semi-finished rail; - forming at least one cut in at least one cover surface of the metal sheet, preferably by means of at least one embossing punch and / or at least one embossing roller, the at least one cut being arranged substantially parallel to the longitudinal extension direction; - a method step in which the metal sheet is mechanically separated in the region of at least one cut, preferably by breaking and breaking, particularly preferably by bending and splitting, - bending the separated metal sheet, thereby forming, in a cross section perpendicular to the longitudinal direction, a profile of at least one component, preferably a rail; It is specified that the following should be carried out in chronological order:

[0010] This makes it possible for the first time to effectively prevent the waste material that occurs during the process of cutting away rails from profiled material in general-purpose component parts, such as rails or similar in the furniture industry. This reduces the disposal and / or recycling costs of scrap metal during mass production, results in cleaner component parts, cleaner processing conditions, reduces post-processing costs, and achieves significant cost savings during production, since the processing steps and punching or separation waste that occur, for example due to the cutting width of the separation tool, accumulate with each component part that is produced.

[0011] Furthermore, tapered longitudinal faces of the profile can be generated automatically at the same time, and these longitudinal faces are formed without burrs (due to plastic deformation), so that the risk of injuries during use of the part component in furniture can be significantly reduced. Typically, only one of the longitudinal faces can be processed before bending, for example, to make effective use of the width of the raw material, or both longitudinal faces can be processed via cuts to provide a tapered portion that remains in the part component during breaking, separation, pulling apart, etc. Typically, the tapered portion can also be removed in a subsequent method step.

[0012] The metal sheet is preferably present as a steel sheet. However, the term "metal sheet" should be broadly interpreted in the context of the present invention, so that other non-metallic plate-like materials, such as plastic sheets, composite sheets, synthetic material sheets, or the like, can also be considered as non-metallic forms of the metal sheet. Particularly preferably, the metal sheet is made of metal.

[0013] Mechanical separation, such as breaking, bending, or splitting without using cutting tools such as saw blades or punches, is not a procedure typically used in the furniture industry, particularly in automated manufacturing of component parts such as rails. This is because careful efforts have been made to minimize the damage to the complex geometric configuration of rails and the like by using cutting separation methods, primarily due to the large material thickness and large cross-sectional diameter of the profiles, as well as the high demands on geometric accuracy and precision of the profiles. This can also be ensured according to the present invention, with the geometry of the profile of at least one component part being accurately maintained in cross section and in the longitudinal direction.

[0014] Particularly lightweight component parts with small wall thicknesses can be produced particularly well by the method of the present invention with low forces and small plastic deformation, while also providing a high level of aesthetically pleasing appearance of the component parts.

[0015] If the sheet metal (e.g., existing as flat steel) is shaped by cutting before the bending process, complex geometries are also possible in the bending process to form the at least one component, with the at least one cutting following the complex geometric shape of the profile of the at least one component, which allows the component to be produced particularly efficiently in mass production. The profile of the at least one component is not undesirably damaged by the at least one cutting, especially due to processing before the bending process.

[0016] The term mechanical separation is to be understood as any separation method that does not generate material waste, as occurs for example with separation methods by machining.

[0017] The member component may be a rail such as a cabinet rail or a drawer rail, particularly for a drawer guide for a furniture fitting, or a band arm, an adjustable arm, a hinge part, a housing part or the like for other furniture fittings such as a flap fitting or a hinge.

[0018] Further positive properties include the fact that the at least one component is free of burrs resulting from the cutting separation method, which reduces the risk of injury to the furniture user and / or the installer of the component, and no reworking is required. Furthermore, for example, the separation tool has a limited service life due to wear phenomena, which can significantly reduce maintenance and / or repair work in the mass production of component parts. The lateral extension (and generally also the longitudinal extension) of the at least one component in width can be flexibly adapted by positioning the at least one notch, and the metal sheet does not have to already be present in the appropriate width (or length) dimension beforehand.

[0019] The at least one member component may be, for example, a furniture rail, a cabinet rail, an intermediate rail (preferably arranged at least partially between a cabinet rail and a drawer rail), a drawer rail, a container rail (preferably for arranging a drawer on the container rail), etc. By cold hardening in a mechanical folding breaking process without separation cuts, without generating chips and preferably without burrs, the at least one notch can act as a target break point, and particularly favorable material properties of the member component occur in the area around the at least one notch.

[0020] The breaking process by folding the part components can be carried out by a separating tool without a separating cut, such as a plunger or the like, or manually. Particularly preferably, semi-automatic or automatic hydraulic or pneumatic drives are used, by which at least one part component can be removed from the remaining material by pressing and / or pulling (e.g., pulling against one another), without the need for punching tools, saws, or grinding machines (which generate burrs and require further processing). The at least one notch acts as a defined breaking edge for forming the at least one part component under bending load, with the tensile / pressure load being concentrated at the at least one notch.

[0021] At least one cut can be applied to the sheet metal in the form of a strip, for example via an embossing punch such as a notch punch or an embossing roller such as a notch roller, and after mechanical separation (breaking by folding), a tapered portion in the form of at least one chamfer is arranged on the end face of the profile of the workpiece component. Preferably, the at least one cut has two sides, one side of which corresponds to the at least one workpiece component after the breaking by folding process.

[0022] As mentioned at the outset, protection of the present invention is also sought for a drawer guide for a drawer for movably supporting a drawer in a furniture cabinet, said drawer guide comprising: - at least one cabinet rail to be fixed to the furniture cabinet; - at least one drawer rail to be coupled to the drawer, the drawer rail being supported for longitudinal movement relative to the at least one cabinet rail; - optionally at least one intermediate rail disposed at least partially between the at least one cabinet rail and the at least one drawer rail; - possibly with at least one drawer rail and / or at least one container rail for placement in the drawer; It has A drawer guide for a drawer, in which at least one cabinet rail and / or at least one drawer rail has, in a cross section perpendicular to the longitudinal direction, a profile formed from at least one flat sheet metal, At least one cabinet rail and / or at least one drawer rail and / or at least one, optionally provided intermediate rail and / or at least one, optionally provided container rail are manufactured as a component by this method, whereby at least one, in particular two, longitudinal faces of the profile of the at least one cabinet rail and / or at least one drawer rail and / or at least one, optionally provided intermediate rail and / or at least one, optionally provided container rail are formed with a tapered portion. It is characterized by:

[0023] However, the method can be used for other furniture fittings other than drawer guides for drawers.

[0024] The method allows for the creation of a tapered portion on at least one longitudinal surface of the profile. An intermediate rail, although not necessarily required, can ensure full extension of the drawer relative to the furniture cabinet and can function as an intermediate element between the cabinet rail and the drawer rail. A container rail, although not necessarily required, can serve as a connecting element between the drawer or container side wall and the drawer rail, for example, in the case of a preferably metal cross-section of the drawer, where the container rail is preferably connected to the drawer guide for the drawer in a material-bonded manner or by means of a neck at the cross-section hat and a vertical support at the drawer rail.

[0025] The longitudinal direction generally corresponds to the longitudinal extension of the sheet metal. Particularly preferably, the tapered portion extends over the entire profile of at least one part component in the longitudinal plane (possibly at one or more end faces).

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

[0027] According to one advantageous embodiment of the invention, it is provided that at least two mutually opposing cuts are arranged on both cover surfaces of the metal sheet, preferably at least two mutually opposing cuts positioned one above the other in a direction perpendicular to at least one cover surface of both cover surfaces.

[0028] By means of cuts located above one another, particularly symmetrical longitudinal faces (or end faces) of the member component can be generated, and cuts that are opposite one another and / or arranged next to one another may generally have different depths and / or cut geometries.

[0029] It is preferred that the bent sheet metal is mechanically separated, preferably broken by folding, particularly preferably split by folding, preferably at at least two cuts located above and below each other.

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

[0031] It has proven advantageous to form at least one component with a tapered portion that is substantially burr-free on at least one, preferably two, longitudinal faces of the profile, wherein the tapered portion preferably has a tapered cross-section perpendicular to the longitudinal extension of the metal sheet that is substantially triangular, preferably isosceles triangular, and it has been specified that the tapered cross-section is particularly preferably formed convexly and / or concavely.

[0032] The tapered portion is typically formed by a combination of cold hardening by machining at least one notch and plastic deformation in a mechanical separation method step, and typically extends over the entire longitudinal face (or end face) of the profile, the longitudinal face being the side face of the underlying metal sheet in the folded state of the profile.

[0033] According to one advantageous embodiment of the present invention, it is specified that the metal sheet is broken in the region of at least one notch without separation cuts, punching and chips, and that the at least one notch is used as a target break point during bending or separating of the metal sheet, and preferably at least one component is formed without further processing.

[0034] The form of mechanical separation is generally optional, and no chips are generated during mechanical separation, and post-processing by cutting may be performed in some cases, however, such post-processing is not necessarily required in order to be able to use at least one part component, for example directly as a furniture rail, without a high risk of injury.

[0035] It has proven advantageous if the metal sheet has a wall thickness in the range of 0.5 mm to 1.8 mm, preferably 0.6 to 0.8 mm.

[0036] Wall thicknesses of less than 1.8 mm, which are used in general-purpose component parts such as rails, result in particularly lightweight component parts which can be mechanically separated particularly advantageously by the method according to the invention and which use only small amounts of material.

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

[0038] The folds allow the wall thickness to be locally doubled, thereby increasing the strength and / or stability characteristics of the member component in desired areas without doubling the weight of the member component itself.

[0039] Particularly preferably, at least one incision is made in the sheet metal in the form of a groove or profile with an opening angle in the range of 40° to 140°, preferably 75° to 105°, particularly preferably substantially 90°.

[0040] For example, the same or different depths and / or geometries can be used for the at least one cut to act as a defined target failure point for tearing and / or breaking by folding.

[0041] In one embodiment of the invention, it is specified that at least one incision has a cutout cross section in the form of a triangle, a trapezoid, an elliptical segment and / or a circular segment, perpendicular to the longitudinal extension of the metal sheet.

[0042] Particularly preferably, the at least one cut is such that after bending the sheet metal into a profile, a gap of 0.05 mm to 0.2 mm, preferably 0.08 mm to 0.12 mm, remains between the two cover faces.Particularly preferably, the at least one cut is trapezoidal, the smallest side length of the trapezoid being 0.1 mm to 0.4 mm, preferably 0.15 to 0.25 mm, between the two cover faces.

[0043] According to one preferred embodiment of the invention, it is specified that for each component, exactly two or four cuts, each arranged in pairs on both cover faces, are machined parallel to the longitudinal direction of a flat metal sheet, and the component is formed by folding and breaking the metal sheet once or twice, preferably consecutively, through the two or four cuts.

[0044] This can expedite the mechanical separation process and also maximize material savings.

[0045] It has proven advantageous to provide the sheet metal with a number of cuts arranged in pairs on both cover faces, and then to mechanically bend and break the component parts.

[0046] This allows large numbers of component parts to be produced in a time-efficient, mass-produced manner, preferably without interruption, from identical semi-finished products.

[0047] Particularly preferably, at least one further cut is arranged in the metal sheet transversely, preferably substantially parallel to the longitudinal extension direction, and it is then preferably specified that the metal sheet, particularly preferably the bent metal sheet, is mechanically separated, particularly preferably folded and broken or folded and split, in the region of the at least one further cut, in order to form at least one substantially burr-free further tapered portion on at least one end face of the part component.

[0048] For example, if both longitudinal faces and both end faces of the rail are each produced by one or another cut (which generally results in four related and / or adjacent tapered sections along the rail contour), it can be ensured that material waste and the risk of injury are reduced particularly significantly.

[0049] Preferably, at least one, in particular two, end faces of the profile of at least one cabinet rail and / or at least one drawer rail and / or at least one, optionally provided intermediate rail and / or at least one, optionally provided container rail are formed with a further tapered portion.

[0050] More preferably, the tapered portion and / or the further tapered portion has an angle in the range of 60° to 140°, preferably 75° to 105°, particularly preferably substantially 90°, and in this case, it is preferably specified that at least one, preferably both longitudinal faces and / or both end faces are formed substantially burr-free.

[0051] The geometry of the tapered portion can be flexibly adjusted by the geometry of the at least one cut.

[0052] In one further embodiment, it may be specified that the at least one cabinet rail and / or at least one drawer rail has at least one fixing section with a fixing side which can be at least partially brought into contact with the furniture cabinet or at least one furniture part during installation in the furniture cabinet or at least one furniture part, and that the at least one fixing section has at least one, preferably circular, opening for passing a fixing means, preferably a screw, and that the at least one opening is surrounded on its second side by a ridge protruding laterally from the second side, the ridge being spaced from the fixing side by a distance of preferably 0.5 mm to 1.8 mm, particularly preferably 0.6 mm to 0.8 mm, depending on the material thickness of the fixing section.

[0053] The raised portion reinforces the periphery of the opening and divides the force acting from below the screw head over a larger area. The raised portion prevents the screw head from sinking into the thin-walled metal of the fastening section. This reduces the risk of damage to the periphery of the opening and saves material.

[0054] According to one advantageous configuration of the invention, it is provided that at least one cabinet rail and / or at least one drawer rail and / or at least one, optionally provided intermediate rail and / or at least one, optionally provided container rail is folded in the region of at least one profile surface of the profile to form a crease.

[0055] The folds can increase the ratio of the load-bearing capacity of the rail or another member component to the weight of the rail / member component.

[0056] It is particularly preferred that at least one tapered section and / or at least one further tapered section have a tapered section cross-section parallel and / or perpendicular to the longitudinal extension of the metal sheet, which cross-section is substantially triangular, preferably isosceles triangle, and it is particularly preferred that the tapered section cross-section is formed convexly and / or concavely.

[0057] According to one preferred embodiment, the profile is specified to have at least one embossment for reinforcing the profile, preferably oriented perpendicular to the longitudinal extension direction of the metal sheet, wherein preferably the at least one embossment extends over at least two profile surfaces that are substantially perpendicular to each other and / or at least two embossments are provided that are arranged alternately towards the inner region and towards the outer region of the profile.

[0058] The at least one embossment promotes stability and / or strength of the at least one member component with particularly efficient material consumption.

[0059] Further details and advantages of the invention are explained in more detail below by the description of the figures with reference to the exemplary embodiments shown in the drawings. [Brief explanation of the drawings]

[0060] [Figure 1a] 1 is a perspective view of a particularly preferred embodiment of a drawer guide for a drawer having a cabinet rail and a drawer rail; FIG. [Figure 1b] FIG. 2 is a perspective view showing the drawer rails individually. [Figure 2a] 1b shows different process steps in a preferred method for manufacturing rails for a drawer guide for a drawer according to the embodiment shown in FIG. 1a; [Figure 2b] 1b shows different process steps in a preferred method for manufacturing rails for a drawer guide for a drawer according to the embodiment shown in FIG. 1a; [Figure 2c] 1b shows different process steps in a preferred method for manufacturing rails for a drawer guide for a drawer according to the embodiment shown in FIG. 1a; [Figure 2d] 1b shows different process steps in a preferred method for manufacturing rails for a drawer guide for a drawer according to the embodiment shown in FIG. 1a; [Figure 2e] 1b shows different process steps in a preferred method for manufacturing rails for a drawer guide for a drawer according to the embodiment shown in FIG. 1a; [Figure 2f] 1b shows different process steps in a preferred method for manufacturing rails for a drawer guide for a drawer according to the embodiment shown in FIG. 1a; [Figure 3] 1c-1d show chronological steps during a preferred method for manufacturing a rail according to the embodiment shown in FIG. 1b; [Figure 4a] 1A and 1B are schematic diagrams illustrating mechanical separation at the cut of a sheet metal; [Figure 4b] 1A and 1B are schematic diagrams illustrating mechanical separation at the cut of a sheet metal; [Figure 4c] 1A and 1B are schematic diagrams illustrating mechanical separation at the cut of a sheet metal; [Figure 5a]1A-1C show a preferred method including the cutting of cuts, mechanical separation and creation of tapers in the longitudinal faces of the member components to be formed for furniture fittings. [Figure 5b] 1A-1C show a preferred method including the cutting of cuts, mechanical separation and creation of tapers in the longitudinal faces of the member components to be formed for furniture fittings. [Figure 5c] 1A-1C show a preferred method including the cutting of cuts, mechanical separation and creation of tapers in the longitudinal faces of the member components to be formed for furniture fittings. [Figure 5d] 1A-1C show a preferred method including the cutting of cuts, mechanical separation and creation of tapers in the longitudinal faces of the member components to be formed for furniture fittings. [Figure 5e] 1A-1C show a preferred method including the cutting of cuts, mechanical separation and creation of tapers in the longitudinal faces of the member components to be formed for furniture fittings. [Figure 5f] 1A-1C show a preferred method including the cutting of notches, mechanical separation and generation of tapers in the longitudinal faces of the piece components to be formed for furniture fittings. [Figure 6] 10 shows a preferred method for manufacturing a rail, in which additional cuts transverse to the longitudinal extension are used. FIG.

[0061] 1a shows a drawer guide 4 for a drawer for movably supporting a drawer in a furniture cabinet, the drawer guide 4 for a drawer comprising a cabinet rail 2 to be fixed to the furniture cabinet and a drawer rail 3 to be fixed to the drawer, the drawer rail 3 being supported so as to be movable in a longitudinal direction 30 relative to the cabinet rail 2. The cabinet rail 2 and the drawer rail 3 have, in a cross section 14 perpendicular to the longitudinal direction 30, a profile 15 formed from a flat sheet metal 5.

[0062] The cabinet rails 2 and drawer rails 3 are manufactured as part components 1 in such a way that at least one (generally two) longitudinal surfaces 51 of the profile 15 of the cabinet rail 2 or drawer rail 3 are formed with a tapered portion 16, the process steps for forming the tapered portion 16 being detailed in Figures 2a to 5f.

[0063] The cabinet rail 2 has a fixing section 32 with a fixing side 33 that can contact the furniture cabinet when attached to the furniture cabinet, and the fixing section 32 has circular openings 35 for passing fixing means such as screws. These openings 35 are surrounded by ridges 39 that protrude laterally from the second side 38, spaced apart by 0.5 mm to 1.8 mm depending on the material thickness of the fixing section 32.

[0064] The profile 15 of the cabinet rail 2 has embossments 41 for reinforcing the profile 15, oriented perpendicular to the longitudinal extension 6 of the metal sheet 5, and the drawer rail 3 may generally have similar stabilizing embossments 41, for example extending across two adjacent profile faces perpendicular to each other. The embossments 41 of the cabinet rail are arranged alternately towards the inner region 42 and the outer region 43 of the profile 15.

[0065] Figure 1b differs from Figure 1a only in that the drawer rail 3 is shown removed. The drawer rail has two longitudinal faces 51 and two end faces 17 of the profile 15. A further taper 52 may generally be arranged on the end faces 17. According to the invention, a taper 16 is arranged on at least one of the longitudinal faces 51, which is formed in the manufacturing process by a cut 13 arranged parallel to the longitudinal extension 6.

[0066] 2a shows the processing of the cuts 13 arranged on the outside of the metal sheet 5. As can be seen in the enlarged detail, three cuts 13 are arranged parallel to the longitudinal direction 30 via the embossing roller 12 (or embossing punch, generally in the sense of cut stitches). From the width 8 of the metal sheet 5, material for five rails can be cut out.

[0067] FIG. 2b shows an enlarged view of the geometry of the cutouts 13, which are provided in the sheet metal 5 in the form of grooves 22 with rounded chamfered profiled portions 23 with an opening angle 24 in the range of 75° to 105°.

[0068] The notch 13 has a notch cross section 25 in the form of a triangle 19 perpendicular to the longitudinal extension 6 of the metal sheet 5, but the shape can generally be any shape and can be formed, for example, as a trapezoid, an elliptical segment or a circular segment.

[0069] FIG. 2c shows a rolling mill for processing semi-finished products or raw materials for producing rails, in which two embossing rollers 12 arranged perpendicular to the longitudinal direction 30 and the longitudinal extension direction 6 and parallel to each other serve to process the incisions 13.

[0070] In the enlarged detail view, two further rollers can be seen, which are arranged perpendicular to the embossing roller 12 and which are provided for rounding the outer edges. This rounding step can be omitted for longitudinal surfaces 51 which are formed via notches 13 and thus have tapered portions 16.

[0071] FIG. 2 d shows a front view of the rolling mill shown in FIG. 2 c, in which the metal sheet 5 is guided continuously between the embossing rollers 12 .

[0072] 2e, which shows a simplified representation of an embossing roller 12 in contact with a metal sheet 5, can be used to explain, by way of example, a method for producing a component 1 for a furniture fitting in the form of a rail for attachment to a drawer guide 4 for a drawer. A flat metal sheet 5 (often a steel sheet, but also an aluminum sheet or a plastic-like plate) with one longitudinal extension 6, two cover surfaces 7 and two side surfaces 9 spaced apart by the width 8 of the metal sheet 5 is provided as a semi-finished product 10 or raw material for the rail.

[0073] The sheet metal 5 is then provided with cuts 13 on both cover sides 7 by the two embossing rollers 12, the cuts 13 being arranged parallel to the longitudinal extension direction 6 (or to the longitudinal direction 30). Subsequently, the sheet metal 5 is mechanically separated (without chips) in the region of the cuts 13, and the sheet metal parts are broken, for example by bending and splitting, or torn by pulling relative to one another.

[0074] The separated metal sheet 5 is then bent, thereby forming a profile 15 of the part component 1 (a rail in this example) in a cross-section 14 perpendicular to the longitudinal extension 6. Before or after the bending process, the metal sheet 5 / profile 15 can be stamped or shaped.

[0075] FIG. 2f shows the cut sheet metal material before mechanical separation in a perspective view and also shows an enlarged, detailed elevational view of the cross-sectional area of ​​the cut 13.

[0076] 3 shows various stages in a preferred manufacturing process for a component in press manufacturing, in which a metal sheet 5 is profiled and stamped and divided into segments by plastic deformation (non-machining deformation) to bend a number of rails. The division into segments takes place both transversely to the longitudinal direction 6 and in the longitudinal direction 6, and generally cutting methods can also be used to separate the segments in the longitudinal direction 30 of the metal sheet 5.

[0077] The metal sheet 5 is provided with a number of notches 13 (and further notches 50) arranged in pairs on both cover surfaces 7, which then make it possible to mechanically fold and break a number of member components 1 which are generally to be further bent.

[0078] In Figures 4a to 4c the mechanical separation process (transverse to the longitudinal extension direction 6) is shown in the example of the individual rails via a breaking tool in the form of a clamp.

[0079] In Figure 4a the clamps are moved relative to one another so that the sheet metal 5 with the notches 13 is clamped between the clamps, as shown in Figure 4b.

[0080] In Fig. 4c, the clamp pair is moved relative to the adjacent clamp pair, whereby the sheet metal is mechanically separated via the cutout 13 as the target breaking point. The rail is thereby separated from the half tool by breaking, and generally a bending or folding process can also be carried out for the mechanical separation (see Fig. 6).

[0081] The cuts 13 shown in the perspective view of FIG. 5a and in the side view of FIG. 5b with the associated partial detail are produced in the raw material by plastic deformation, which allows a division transverse to the direction of the profile formation.

[0082] When the cut sheet metal material is plastically deformed as shown in Fig. 5c, the sheet metal 5 is divided into segments along the contours defined by the cuts 13, a phenomenon which is shown diagrammatically in Fig. 5d. After mechanical division, four sheet metal parts are obtained, which can be used to manufacture the component 1, with the outer segment being formed with a burr-free tapered portion 16 on one longitudinal side 51 of the profile 15 to be bent, and both inner segments being used for the profile 15 with tapered portions 16 formed on both longitudinal sides 51.

[0083] In Figure 5e, the sheet metal 5 has already been mechanically divided via incisions 13 transverse to the longitudinal extension 6. In Figure 5f, one of the segments is shown in the longitudinal direction 30, and it can be seen that the tapered sections 16 each have a tapered cross section 18 in the form of a triangle 19, which is perpendicular to the longitudinal extension 6 of the sheet metal 5. These tapered cross sections 18 are formed partly convex and partly concave, and the contour of the tapered cross section 18 can be influenced, for example, by the type of separation process (by tearing at an obtuse angle, for example, a purely convex shape can be obtained).

[0084] In the example of a component 1 that can be formed as shown in Figure 5f, exactly four paired cuts 13 are machined in the flat metal sheet 5 on each of the two cover sides 7, parallel to the longitudinal extension direction 6, and the component 1 can be formed by folding the metal sheet 5 twice in succession via the four cuts 13 and breaking it (and then bending it).

[0085] A large number of two notches 13 are arranged on both cover surfaces 7 of the metal sheet 5, each one positioned above the other and facing each other in a direction perpendicular to one of the cover surfaces 7. The metal sheet 5 is mechanically separated at the two notches 13 positioned above each other. The separation process can be carried out by applying tensile and / or compressive stress.

[0086] The tapered portion 16 (and the further tapered portion 52 shown in FIG. 6) each form an angle 31 with respect to one another in the range of 75° to 105°. Both longitudinal faces 51 (or end faces 17 shown in FIG. 6) are formed substantially burr-free with respect to injury during use, and typically only one longitudinal face 51 (or end face 17) may be so machined.

[0087] The metal sheet 5 is broken or split in the area of ​​the notch 13 without separation cuts, punching and chips, and the notch 13 is used as a target break point during bending or separating the metal sheet 5, thereby making it possible to produce a part component 1 that does not require a post-processing step by cutting (which is necessary for safety reasons).

[0088] The metal sheet 5 has a wall thickness 20 of 0.7 mm, with a wall thickness in the range of 0.5 mm to 1.8 mm being preferred.

[0089] FIG. 6 shows a component 1 in the form of a drawer rail 3, in which the sheet metal 5 is folded in the area of ​​both longitudinal faces 51 during bending of the sheet metal 5 into a profile 15, forming folds 21.

[0090] In such a component 1, in addition to the cut 13 and the tapered portion 16, a further cut 50 is arranged in the sheet metal 5 parallel to the longitudinal extension 6. The sheet metal 5 can be mechanically separated, in the bent or unbent state, in the region of this further cut 50 in order to form a further tapered portion 52 at the end face 17 of the component 1 that is substantially burr-free. In this case too, the separation process can be carried out, for example, by splitting or bending.

[0091] One of the end faces 17 of the profile 15 is formed with a separate tapered portion 52, but in general both end faces 17 may be provided with a separate tapered portion 52.

[0092] The tapered cross section 18 of the further tapered portion 52 is provided in the form of a convex triangle 19 (similar to the tapered portion 16), and the geometry of the further tapered portion 52 is generally arbitrary, and this geometry can be influenced by the further cuts 50 and in conjunction with the mechanical separation method.

Claims

1. A method for manufacturing at least one component (1) for a furniture fitting, particularly preferably a rail for a drawer guide (4) for a drawer, comprising the following method steps to be carried out in chronological order: - providing a flat sheet metal (5) with a longitudinal extension (6), two cover faces (7) and two side faces (9) spaced apart by the width (8) of the sheet metal (5) as said at least one component (1), preferably as said rail semi-finished product (10); - forming at least one incision (13) in at least one cover surface (7) of said metal sheet (5), preferably by means of at least one embossing punch and / or at least one embossing roller (12), said at least one incision (13) being arranged substantially parallel to said longitudinal extension direction (6); - a method step of mechanically separating, preferably breaking and particularly preferably bending and splitting, said sheet metal (5) in the region of said at least one incision (13), bending the separated metal sheet (5) to form, in a cross section (14) perpendicular to the longitudinal extension (6), a profile (15) of the at least one component (1), preferably a rail; A method characterized by:

2. 2. The method according to claim 1, wherein the at least one workpiece component (1) is formed with a substantially burr-free tapered portion (16) on at least one, preferably two, longitudinal faces (51) of the profile (15), wherein the tapered portion (16) preferably has a tapered cross-section (18) perpendicular to the longitudinal extension (6) of the metal sheet (5) that is substantially in the form of a triangle (19), preferably in the form of an isosceles triangle, and wherein the tapered cross-section (18) is particularly preferably formed convexly and / or concavely.

3. 3. The method according to claim 1, wherein at least two mutually opposing cuts (13) are arranged in the two cover surfaces (7) of the metal sheet (5), preferably at least two mutually opposing cuts (13) positioned one above the other in a direction perpendicular to at least one of the two cover surfaces (7).

4. 4. The method according to claim 1, wherein the metal sheet (5) is mechanically separated, preferably broken by folding, particularly preferably split by folding, at at least two notches (13), preferably at at least two notches (13) located above and below each other.

5. 5. The method according to claim 1, wherein the metal sheet (5) is broken in the region of the at least one incision (13) without separation cuts, punching, and chips, and the at least one incision (13) is used as a target break point during bending or separating the metal sheet (5), and preferably the at least one part component (1) is formed without further processing.

6. Method according to any one of the preceding claims, characterized in that the metal sheet (5) has a wall thickness (20) in the range of 0.5 mm to 1.8 mm, preferably 0.6 to 0.8 mm.

7. 7. The method according to claim 1, wherein the metal sheet (5) is folded in the region of at least one longitudinal surface (51), preferably during bending of the metal sheet (5), to form a fold (21).

8. 8. The method according to claim 1, wherein the at least one incision (13) is machined into the metal sheet (5) in the form of a groove (22) or a profile (23) with an opening angle (24) in the range of 40° to 140°, preferably 75° to 105°, particularly preferably substantially 90°.

9. 9. The method according to claim 1, wherein the at least one incision (13) has a cutout cross section (25) perpendicular to the longitudinal extension (6) of the metal sheet (5) in the form of a triangle (19), a trapezoid, an elliptical segment and / or a circular segment.

10. 10. The method according to claim 1, further comprising the steps of: forming, for each component (1), exactly two or four cuts (13) arranged in pairs on both cover faces (7) in the flat metal sheet (5) parallel to the longitudinal direction (6); and forming the component (1) by folding and breaking the metal sheet (5) once or twice, preferably consecutively, via the two or four cuts (13).

11. 11. The method according to claim 1, further comprising the steps of: forming a plurality of cuts (13) in the sheet metal (5) arranged in pairs on both cover surfaces (7); and then mechanically bending and breaking the plurality of component parts (1).

12. 12. The method according to claim 1, wherein at least one further cut (50) is arranged in the metal sheet (5) transversely, preferably substantially parallel to the longitudinal extension direction (6), and the metal sheet (5), particularly preferably the bent metal sheet (5), is preferably mechanically separated, particularly preferably broken and broken or broken and split, in the region of the at least one further cut (50) in order to form at least one substantially burr-free further tapered portion (52) on at least one end face (17) of the part component (1).

13. A drawer guide (4) for a drawer for movably supporting a drawer in a furniture cabinet, comprising: - at least one cabinet rail (2) to be fixed to said furniture cabinet; - at least one drawer rail (3) to be coupled to said drawer, said drawer rail (3) being supported so as to be movable in a longitudinal direction (30) relative to said at least one cabinet rail (2); - optionally at least one intermediate rail arranged at least partially between said at least one cabinet rail (2) and said at least one drawer rail (3); - optionally, said at least one drawer rail (3) and / or at least one container rail for placement on said drawer; It has A drawer guide (4) for a drawer, wherein the at least one cabinet rail (2) and / or the at least one drawer rail (3) has, in a cross section (14) perpendicular to the longitudinal direction (30), a profile (15) formed from at least one flat sheet metal (5), The at least one cabinet rail (2) and / or the at least one drawer rail (3) and / or the at least one, optionally provided intermediate rail and / or the at least one, optionally provided container rail are manufactured as a component (1) by the method according to any one of claims 1 to 12, whereby at least one, in particular two, longitudinal faces (51) of the profile (15) of the at least one cabinet rail (2) and / or the at least one drawer rail (3) and / or the at least one, optionally provided intermediate rail and / or the at least one, optionally provided container rail are formed with a tapered portion (16). A drawer guide (4) for a drawer, characterized in that

14. 14. The drawer guide (4) for a drawer according to claim 13, wherein at least one, in particular two, end faces (17) of the profile (15) of the at least one cabinet rail (2) and / or the at least one drawer rail (3) and / or the at least one, optionally provided intermediate rail and / or the at least one, optionally provided container rail are formed with a further tapered portion (52).

15. Drawer guide (4) for a drawer according to claim 13 or 14, characterized in that the tapered portion (16) and / or the further tapered portion (52) have an angle (31) in the range of 60° to 140°, preferably 75° to 105°, particularly preferably substantially 90°, and preferably at least one, preferably both longitudinal faces (51) and / or both end faces (17) are formed substantially burr-free.

16. 16. The drawer guide (4) for drawers according to any one of claims 13 to 15, wherein the at least one cabinet rail (2) and / or the at least one drawer rail (3) has at least one fixing section (32) with a fixing side (33) which can be at least partially brought into contact with the furniture cabinet or the at least one furniture part during installation in the furniture cabinet or the at least one furniture part, the at least one fixing section (32) having at least one, preferably circular, opening (35) for passing a fixing means, preferably a screw, therethrough, the at least one opening (35) being surrounded on its second side (38) by a ridge (39) protruding laterally from the second side (38) at a distance from the fixing side (33) preferably of 0.5 mm to 1.8 mm, particularly preferably of 0.6 mm to 0.8 mm, depending on the material thickness of the fixing section (32).

17. 17. A drawer guide (4) for a drawer according to any one of claims 13 to 16, wherein the at least one cabinet rail (2) and / or the at least one drawer rail (3) and / or the at least one, optionally provided intermediate rail and / or the at least one, optionally provided container rail are folded in the region of at least one profile surface (40) of the profile (15) to form a fold (21).

18. 18. A drawer guide (4) for a drawer according to any one of claims 13 to 17, wherein the at least one tapered portion (16) and / or the at least one further tapered portion (52) have a tapered portion cross-section (18) parallel and / or perpendicular to the longitudinal extension (6) of the metal sheet (5) that is substantially in the form of a triangle (19), preferably in the form of an isosceles triangle, and preferably the tapered portion cross-section (18) is formed convexly and / or concavely.

19. 19. A drawer guide (4) for a drawer according to any one of claims 13 to 18, wherein the profile (15) has at least one embossment (41) for reinforcing the profile (5), preferably oriented perpendicular to the longitudinal extension (6) of the metal sheet (5), and wherein preferably the at least one embossment (41) extends over at least two profile faces (40) that are substantially perpendicular to one another and / or at least two embossments (41) are provided that are arranged alternately towards an inner region (42) and towards an outer region (43) of the profile (15).

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