• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a sheet-metal component (1) bent from a sheet metal blank (7) with at least one triangular corner (2), two edges (3, 4) of the triangular corner (2) being separated by a first part and a second part (11) ) of the sheet metal blank (7) bent sheet metal legs (5, 6) of the sheet metal blank (7) and the third edge (8) of the triangular corner (2) by two mutually weldable outer edges (9, 10) of the two bent sheet metal legs (5, 6) and wherein the sheet metal blank (7) has, in the intersection region of the two outer edges (9, 10), a cutout (13) reaching into the base part (11). According to the invention, the cutout (13) of the sheet metal blank (7) opens into the outer edge (9) of the first sheet-metal limb (5, 6) and hook-shaped by a curved and in the first sheet metal leg (5) and in the base part (11) concave or polygonal first edge (14) and a in the first and third leg (5) extending in the base (11), in the direction of the first edge (14) projecting, arc and / or polygon-shaped second edge (15) is formed, the second Rim (15) extends with a serration (16) beyond the straight line defined by the bending line (A) of the first bending mandrel (5) by at most the sheet thickness (t) and the serrated tip (17) from the first edge (14) at least around the sheet thickness (t) is spaced apart, and that, in the case of bent-over bent legs (5, 6), the points (16) are encompassed by the first edge (14) and the scarf (13) is at least substantially closed by the point (16).
    公开号:AT514192A2
    申请号:T50157/2014
    申请日:2014-03-04
    公开日:2014-10-15
    发明作者:
    申请人:Trumpf Werkzeugmaschinen Gmbh；
    IPC主号:
    专利说明:

    1
    (39669) HEL
    The present invention relates to a bent from a sheet metal sheet metal part having at least one triangular corner, wherein two edges of the triangular corner by a first and a second, each bent from a base of the sheet metal sheet leg of the sheet metal blank and the third edge of the triangular corner by two welded together Outside edges of the two bent sheet metal legs are formed and wherein the sheet metal blank has in the intersection of the two outer edges a reaching into the base part cutout. The invention also relates to a sheet metal blank for bending to a sheet-metal component having at least one triangular corner, and to a method for producing a bent corner of a sheet-metal component bent from a sheet metal blank.
    Such a sheet metal blank and such a bent sheet-metal component have become known, for example, from DE 10 2009 004 798 A1. For laser welding of boxes, hoods or other sheet metal structures, the components must be designed so that the gap tolerance for the subsequent joining process is maintained. For good welding results with sufficient process reliability, the three-edged corners of the sheet metal construction must generally have a gap of no more than 0.1 to 0.2 mm. In addition, the sheet metal legs should be designed to overlap by a certain amount. In particular, in the field of visual seams, an overlap of at least about 70% of the sheet thickness is recommended. Correspondingly, a preparation of the corner is required of the component preparation, which is to be considered between two bending legs of the underlying sheet metal blank. 2/14 2
    In the general case, i. in a (free) bend with no further requirements for subsequent process steps, at the intersection of the bend lines, a e.g. 3/4-circular recess produced by a punching with the diameter d. The diameter is chosen as a function of the sheet thickness t.
    From DE 10 2009 004 798 A1, it is already known to provide a wedge-shaped cutout ("free-linking", "corner notching") in the inner corner of the sheet metal blank located between two bending creases, which pinching during bending and an associated bulging of the sheet Bending parts in this area avoids. With this wedge-shaped cutout existing between the two bent sheet metal legs gap width can be reduced to a small gap, as required for laser welding of the two sheet metal legs or visible edges with high demands. Due to their narrow geometry, the wedge-shaped cutout can only be produced by means of laser cutting. For thin sheet metal and high quantities punching blanks are, however, more economical than laser blanks, so that boxes with thin wall thickness are previously welded together from several stamping parts.
    In contrast, it is the object of the present invention to provide a stampable geometry for the cutout of the underlying sheet metal blank in a laser weldable sheet metal component of the type mentioned as well as to provide a method for Flerstellen a bent from the sheet metal blanks triangular corner.
    This object is achieved in the sheet metal part according to the invention that the cutout of the sheet metal blank opens into the outer edge of the first sheet metal leg and hook-shaped by a concave in the first sheet leg and in the base concave, arched and / or polygonal first edge and in the first sheet leg and in Base running, towards the first 3/14 3
    Edge protruding, arcuate and / or polygonal second edge is formed, wherein the second edge extends with a spike on the line defined by bending line of the first bending mandrels out at most the sheet thickness and the serrated point from the first edge at least by the sheet thickness. stands is, and that with bent sheet metal legs of the teeth embraced by the first edge and the cut is at least largely closed by the spike.
    According to the invention, the cutout is dimensioned so large that the punch is not substantially smaller than the sheet thickness in cross section. So that the cut does not lead to a hole after bending, which can not be closed by welding, the cut is closed by the teeth so far that the teeth and the first edge can be welded together or that between the teeth and the first edge possibly still existing gap is closed by welding. Preferably, the gap width of such a gap is at most about 0.2 mm. If the point of the spike still protrudes beyond the sheet metal component, this supernatant is melted off during welding and additionally supplies material to close the gap.
    The free-cutting size is adapted to the sheet thickness and the bending parameters, so that a special punch and die are to be provided for each sheet thickness. The cut-out can be made by laser cutting or punching. The sheet-metal component according to the invention enables small "laser-weldable" gap dimensions, in particular from 0.1 to 0.2 mm, and is particularly suitable for sheet thicknesses of 1 to 2 mm and for the materials S235, X5CrNi18-10 and AIMg3. The invention opens up the possibility of welding punched one-piece boxes with the laser (thermal conduction welding). This is more economical than laser blanks for larger numbers and thin sheets, and especially for straight cut edges on the components. 4/14 4
    In particular in the area of visual seams, it is advantageous if the gap width of a gap present between the first and the second bent sheet metal leg is about 0.2 mm at the maximum and if the two outer edges of the two bent sheet metal legs overlap one another. Preferably, the overlap of the two bent sheet metal legs amounts to at least approximately 70% of the sheet metal thickness of the sheet metal blank.
    Advantageously, the first edge of the cutout is formed as a circular arc in sheet metal blank to allow simple contours in the punching tools.
    Particularly preferably, in the sheet metal blank of the teeth on two mutually obtuse converging flanks. The prongs may lie on the bending line of the second sheet-metal limb, so that at least partially the rear prong flank is formed by the base part and the front prong flank is formed by the second sheet-metal limb.
    In the case of sheet metal cutting, the straight line defined by the bending line of the second sheet-metal limb preferably also extends through the first sheet-metal limb, whereas the straight line defined by the bending line of the first sheet-metal limb extends outside the second sheet-metal limb.
    Particularly preferably, the first edge and the jaws embraced by the first edge and also the two outer edges of the bent sheet metal legs, welded together, in particular laser welded, to form a self-contained corner.
    The invention also relates to the sheet metal blank underlying the sheet metal component described above.
    Furthermore, the invention relates to a method for producing a bent from a sheet metal blank triangular corner of a sheet metal component, comprising the following steps: 5 - providing the sheet metal blank described above by punching or laser cutting of the cutout; and - bending the two sheet metal legs around the bending lines to the triangular corner; - In addition preferably welding, in particular laser welding, the first edge and the jaws embraced by the first edge and the two outer edges of the bent sheet metal legs.
    Finally, the invention also relates to a computer program product having code means adapted for laser cutting the above-described cutout in a sheet metal blank when the program is run on a laser processing machine.
    Further advantages of the invention will become apparent from the claims, the description and the drawings. Likewise, the features mentioned above and the features listed further can be used individually or in combination in any combination. The embodiments shown and described are not to be understood as exhaustive enumeration, but rather have exemplary character for the description of the invention.
    Show it:
    1 shows a sheet metal component according to the invention with a triangular corner;
    Figure 2 shows the sheet metal blank from which the sheet metal component shown in Figure 1 is gebo conditions.
    3 is a detailed view of a cutout of the sheet metal blank according to III in Fig. 2. and
    Fig. 4 shows the geometric construction of the recess shown in Fig. 3.
    Fig. 1 shows a sheet metal component 1 with a triangular corner 2, wherein two edges 3, 4 of the corner 2 by a first and a second, respectively bent by 90 ° sheet leg 5, 6 of a sheet metal blank 7 (Figure 2) are formed and Give the third edge 8 of the corner 2 through the two overlapping bent sheet metal 6/14 6! 5, 6 is formed. More precisely, the third edge 8 is formed by subsequent laser welding of the outer edges 9, 10 of the two bent sheet metal legs 5, 6. The location of these outer edges 9, 10 results from the constructed coverage of 70% and half the reduction value based on the bending line.
    The two sheet metal legs 5, 6 are bent by a base 11 of the sheet metal blank 7 by the same inner bending radius R by 90 ° around the bending lines A and B by free bending, wherein the overlap 12 of the two bent sheet metal legs 5, 6 at least about 70th % of the sheet thickness t of the sheet metal blank 7 is. If there is any, between the two bent sheet metal legs 5, 6 existing gap of the triangular corner 2 is a maximum of about 0.2 mm.
    As shown in FIGS. 2 and 3, the flat sheet metal blank 7 has, in the region of intersection of the two outer edges 9, 10, a cutout 13 reaching into the base part 11. The cutout 13 opens into the outer edge 9 of the first sheet-metal limb 5 and is hook-shaped by a circular edge 14 running concavely in the first sheet-metal limb 5 and in the base 11 and a toothed rim 15 projecting in the direction of the circular-arc edge 14 in the second sheet-metal limb 6 and in the base 11 educated. The serrated edge 15 extends with a triangular serrations 16 beyond the straight line defined by the bending line A by at most the sheet thickness t, the rounded serrated tip 17 being spaced from the circular arc edge 14 by at least the sheet thickness t. The spike 16 has a rear and a front edge 18a, 18b, which converge at an obtuse angle to each other and meet in the rounded point of the spike 17. The straight line defined by the bending line A runs outside the second sheet-metal limb 10 and parallel to its outer edge 10. The bending line B terminates at the trailing edge 18a of the serration 16, the straight line defined by the bending line B within the first sheet-metal limb 5 and in parallel spacing extends to the outer edge 9. 7/14 7
    When bending the two sheet metal legs 5, 6 each 90 ° to the triangular laser welding corner 2 and the spike 16 along the bending line B is bent by 90 ° and forms, as shown in Fig. 1, the one end of the edge 4. In bent sheet metal legs 5, 6, the spike 16 is encompassed by the first edge 14, and the recess 13 is at least largely closed by the spike 16. In this case, both the gap width of an existing between the serrated tip 17 and the first edge 15 gap 19 and the gap width of an optionally between the two outer edges 9,10 existing gap 20 is a maximum of about 0. 2, to this column 19, 20 then Welding with filler metal (heat conduction welding) to fill and weld. Preferably, either no gap at all or a gap width of not more than 0.1 to 0.2 mm is not exceeded.
    With reference to FIG. 4, the steps of a geometric construction of the cutout 13 shown in FIG. 3 will be described under the following boundary conditions: The overlap 12 of the two bent sheet metal legs 5, 6 is approximately 70% of the sheet thickness t. - The gap 20 between the outer edges 9,10 is smaller than 0,1mm. - The final welding is done by thermal conduction welding. - The location of these outer edges 9,10 results from the constructed coverage of 70% and half the reduction value based on the bending line. The outer edge 9 extends beyond the bend line B by the dimension K ', and the outer edge 10 is set back by the dimension K "behind the bending line A, where K': sheet thickness t - Vz bending shortening, K": coverage of 70% - K '. K "depends on the coverage; with an overlap of 0%, K '= K "The sign only revolves because it is added in the description starting from the bend line. 1. Defining a square 21 in the intersecting bending lines A, B, wherein the square is symmetrical to both bending lines A, B and the side length b 8/14 8 has. This side length b results from the following formula: b = + Ax 2 X (fi + tBlech) tan (^) with η inner bending radius of the sheet metal legs 5, 6, tßiech sheet thickness, α bending angle of the sheet metal legs 5, 6, Δχ shortening factor to the the sheet metal blank shortens when bending. 2. 3. 4. 5. 6. 7.
    Connecting the square ends of the bending lines A, B: S1. Center perpendicular M1 of the route S1.
    Parallel displacement of the mid-perpendicular M1 in the direction of the sheet metal leg 5 by the sheet thickness t: straight line G1.
    Connecting the point of intersection P1 of S1 and M1 with the outer corner (point P2 on the outer edge 10) of the square on the second sheet metal leg 6:
    Route S2.
    Center perpendicular M2 of the range S2.
    Connecting the point of intersection P3 of M1 and M2 with the point P2: distance S3. 8. Circle K through P1 and P2 and tangent to G1. 9. Extend outer edge 9 of first bending tooth 5 by distance S4 to circle K (intersection P4). 10. The circular arc from P4 to P1 forms the circular arc edge 14 and the line P2, P3, P1 forms the jagged edge 15 of the recess 13. 11. rounding of the point tip P3. 9.14
    权利要求:
    Claims (14)
    [1]
    Patent Attorneys Dipl.-Ing. Helmut Hübscher Dipl.-Ing. Claims 1. A sheet metal component (1) bent from a sheet metal blank (7) with at least one triangular corner (2), two edges (3, 4) of the triangular corner (2) passing through a first and a second sheet metal limb (5, 6) bent over in each case by a base part (11) of the sheet metal blank (7) of the sheet metal blank (7) and the third edge (8) of the triangular corner (2) by two outer edges (9 , 10) of the two bent sheet metal legs (5, 6) are formed and wherein the sheet metal blank (7) in the intersection of the two outer edges (9,10) has a reaching into the base (11) reaching into the recess (13), characterized in that the cutout (13) of the sheet metal blank (7) opens into the outer edge (9) of the first sheet-metal limb (5, 6) and hook-shaped by a bow-shaped and / or polygonal shape running concavely in the first sheet limb (5) and in the base part (11) first edge (14 ) and in the first sheet-metal leg (5) and in the base part (11) extending, in the direction of the first edge (14) projecting, arc and / or polygonal second edge (15) is formed, wherein the second edge (15) itself extending with a serration (16) beyond the straight line (t) defined by the bending line (A) of the first bending gimp (5) and the serrated point (17) being spaced from the first edge (14) at least by the sheet thickness (t), and in the case of bent sheet metal legs (5, 6), the serrations (16) are encompassed by the first edge (14) and the cutout (13) is at least substantially closed by the serrations (16). 10/14
    [2]
    2. Sheet metal component according to claim 1, characterized in that the gap width of a between the first and the second bent sheet metal leg (5, 6) existing gap (20) is a maximum of about 0.2 mm.
    [3]
    3. Sheet metal component according to claim 1 or 2, characterized in that the overlap (12) of the two bent sheet metal legs (5, 6) at least about 70% of the sheet thickness (t) of the sheet metal blank (7).
    [4]
    4. Sheet metal component according to one of the preceding claims, characterized in that the sheet metal blank (7) of the first edge (14) of the cutout (13) is formed as a circular arc.
    [5]
    5. Sheet metal component according to one of the preceding claims, characterized in that the sheet metal blank (7) of the teeth (16) has two mutually obtuse mutually tapered edges.
    [6]
    6. Sheet metal component according to one of the preceding claims, characterized in that the sheet metal blank (7) the serrated tip (17) rounded Ausausge forms.
    [7]
    7. Sheet metal component according to one of the preceding claims, characterized in that the sheet metal blank (7), the bending line (B) of the second sheet-metal leg (6) passes through the teeth (16).
    [8]
    8. Sheet metal component according to one of the preceding claims, characterized in that the sheet metal blank (7) through the bending line (B) of the second sheet-metal leg (6) defined straight line through the first sheet-metal leg (5).
    [9]
    9. Sheet metal component according to one of the preceding claims, characterized in that the sheet metal blank (7) through the bending line (A) of the first sheet-metal leg (5) defined straight line outside the second sheet-metal leg (6). 11/14
    [10]
    10. Sheet metal component according to one of the preceding claims, characterized in that the first edge (14) and the first edge (14) encompassed teeth (16), in particular also the two outer edges (9, 10) of the bent sheet metal legs (5, 6 ), welded together, in particular laser welded.
    [11]
    11. sheet metal blank (7) for bending to a sheet metal component (1) having at least one triangular corner (2) according to one of the preceding claims.
    [12]
    12. A method for producing a bent from a sheet metal blank (7) triangular corner (2) of a sheet metal component (1), comprising the following method steps: - providing a sheet metal blank (7) according to claim 11 by punching or laser cutting of the cutout (13); and - bending the two sheet metal legs (5, 6) around the bending lines (A, B) to the triangular corner (2).
    [13]
    13. The method according to claim 12, characterized in that the first edge (14) and the first edge (14) encompassed teeth (16), in particular also the two outer edges (9,10) of the bent sheet metal legs (5, 6), welded together, in particular laser welded.
    [14]
    A computer program product comprising code means adapted to laser cut a cutout (13) in a sheet metal blank (7) according to claim 11 when the program is run on a laser processing machine. Linz, 4 March 2014 TRUMPF Werkzeugmaschinen GmbH + Co. KG by: / Dl Karl Winfried Hellmich / (electronically signed) 12/14
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2463780A|1945-04-24|1949-03-08|Korrol Irving|Blank base and the method of its manufacture|
    US3127862A|1958-03-12|1964-04-07|Michael C Presnick|Box and method of making the same|
    DE1552082A1|1966-11-02|1970-01-29|Siemens Elektrogeraete Gmbh|Process for the production of a sheet metal wall part|
    DE19531103B4|1995-08-24|2004-07-08|Hartwig Wollert|Process for the production of hygienic square containers and device|
    JP2007229774A|2006-03-02|2007-09-13|Toyota Auto Body Co Ltd|Method for press-forming metallic case and metallic case|
    ES2332849B1|2008-02-07|2011-01-26|Proyectos Y Construcciones Metalicas Josman, S.L.|PAN MOLD.|
    DE102009004798B9|2009-01-13|2013-01-31|Trumpf Laser- Und Systemtechnik Gmbh|Sheet metal component with a laser-welding-compatible triangular corner, associated sheet metal blank and method for producing and optimizing the sheet metal blank|CN107511617B|2017-07-03|2019-07-05|湖北精工钢结构有限公司|The production method and its multisided surface abnormity body structure of multisided surface abnormity cabinet|
    JP6511507B2|2017-12-08|2019-05-15|株式会社アマダホールディングス|Method for bending plate-like work, mold and bending product|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE201310206183|DE102013206183B3|2013-04-09|2013-04-09|Laser-weldable sheet component e.g. box, has tooth engaged by arc edge when legs are bent, and blank including cutout in section region of outer edges, where cutout is closed by tooth, and tooth tip is spaced at distance from arc edge|
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