EP1871553A1 - Procede de production d'elements a corps creux, element a corps creux, piece d'assemblage, outil a suivre compose pour produire des elements a corps creux et laminoir - Google Patents

Procede de production d'elements a corps creux, element a corps creux, piece d'assemblage, outil a suivre compose pour produire des elements a corps creux et laminoir

Info

Publication number
EP1871553A1
EP1871553A1 EP06753856A EP06753856A EP1871553A1 EP 1871553 A1 EP1871553 A1 EP 1871553A1 EP 06753856 A EP06753856 A EP 06753856A EP 06753856 A EP06753856 A EP 06753856A EP 1871553 A1 EP1871553 A1 EP 1871553A1
Authority
EP
European Patent Office
Prior art keywords
profile
hollow body
broad side
hollow
annular recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06753856A
Other languages
German (de)
English (en)
Other versions
EP1871553B1 (fr
Inventor
Jiri Babej
Richard Humpert
Michael Vieth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Profil Verbindungstechnik GmbH and Co KG
Original Assignee
Profil Verbindungstechnik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Profil Verbindungstechnik GmbH and Co KG filed Critical Profil Verbindungstechnik GmbH and Co KG
Publication of EP1871553A1 publication Critical patent/EP1871553A1/fr
Application granted granted Critical
Publication of EP1871553B1 publication Critical patent/EP1871553B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/64—Making machine elements nuts
    • B21K1/70—Making machine elements nuts of special shape, e.g. self-locking nuts, wing nuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/64—Making machine elements nuts
    • B21K1/70—Making machine elements nuts of special shape, e.g. self-locking nuts, wing nuts
    • B21K1/702—Clinch nuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/64—Making machine elements nuts
    • B21K1/66—Making machine elements nuts from strip bars

Definitions

  • the present invention relates to a method for producing hollow body elements, such as nut elements, for attachment to usually made of sheet metal components, in particular for the production of hollow body elements with an at least substantially square or rectangular outer contour, by cutting individual elements of one in the form of a profile bar or a Wickels present profile after prior punching of holes in the profile, optionally with subsequent formation of a threaded cylinder using a progressive tool with multiple workstations in which respective operations are performed. Furthermore, the present invention relates to hollow body elements, which are produced by the method, assembly components, which consist of a hollow body member and a sheet metal part and progressive dies for performing the method and rolling mills, which can be used in combination with the progressive tools.
  • a method of the aforementioned type and corresponding hollow body elements and assembly components are known for example in the not previously published application PCT / EP2005 / 003893 from 13 April 2005.
  • Object of the present invention is to develop the method of the type mentioned so that hollow body elements, in particular rectangular nut elements are manufactured inexpensively without putting a strain on the tools used, causing them to fail prematurely.
  • the hollow body elements produced in this way should have excellent mechanical properties, for example a high pull-out force, excellent resistance to twisting and, moreover, a reduced notch effect, so that the fatigue properties of assembly components consisting of a component usually consisting of sheet metal and hollow body elements attached to it dynamic loads are improved.
  • the hollow body elements should be extremely inexpensive to produce.
  • a particularly advantageous design of a follow-on composite tool used in the production of the hollow body elements as well as a rolling mill which can be used for the purpose of producing hollow body elements should be provided according to the invention.
  • the object of the invention is achieved by a method according to claim 1, by a hollow body element according to claim 23, by an assembly component according to claim 37, by a progressive compound tool according to claim 41 and by a rolling mill according to claim 46, the respective subclaims representing preferred embodiments of the invention.
  • the profile used thus has a rectangular cross section and is therefore inexpensive to manufacture.
  • the production method according to the invention makes it possible to produce hollow body elements without the tools used being subject to high wear and without the punches failing prematurely. Furthermore, the problem of elongation of the profile strip in the follow-on composite tool has been overcome most effectively by the fact that, depending on the design of the incoming profile strip, only one forming station or at most two forming stations in the follow-on composite are necessary or that according to the invention a station for forming an undercut on the pilot part of the hollow body element in comparison to the aforementioned application PCT / EP2005 / 003893 is no longer required.
  • Fig. 1 shows an embodiment of a profile, which is processed in a progressive tool according to the figure 2, wherein the
  • FIG. 2 shows a representation of a follow-on composite tool cut in the direction of movement of the profile
  • 4A-4E is an illustration of the individual steps of the production of a hollow body element using the method and the progressive tool of FIGS. 2 and 3,
  • FIGS. 5A-5N show various views of the finished hollow body element of FIGS. 4A-4E, wherein FIG. 5A shows a perspective view of the hollow body element from below, FIG. 5B shows a plan view of the hollow body element from above, FIG. 5C shows a sectional view corresponding to the sectional plane CC or CC of FIG. 5B and FIG. 5D shows an enlarged representation 5E-5I show an ideal variant of the hollow body element of FIGS. 5A-5D, designed for thicker sheet-metal parts, while FIGS. 5J-5N show a further ideal variant, which corresponds to FIG Application designed with thinner sheet metal parts,
  • FIGS. 5A-5D are illustrations of another hollow body element which is a slight modification of the hollow body element according to FIGS. 5A-5D, FIG. 6A showing a plan view of the hollow body element from above, FIG. 6B being a sectional view along the sectional plane BB of FIG. 6A Fig. 6C is a sectional view corresponding to the sectional plane CC of Fig. 6A, and Figs. 6D and 6E are perspective views of the functional element from above and below,
  • FIG. 8A-8D representations of a further embodiment variant of a hollow body element with anti-rotation features in the form of radially extending ribs which bridge the annular recess
  • FIG. 8A is a view of the hollow body element from below
  • FIGS. 8B and 8C are sectional views corresponding to the horizontal sectional plane BB or the vertical sectional plane CC of FIG. 8A
  • FIG. 8D is a perspective drawing
  • FIGS. 8A-8D representations corresponding to FIGS. 8A-8D, but of an embodiment with inclined anti-rotation ribs extending in the radial direction over the annular recess and extend in the axial direction along the undercut of the punching section,
  • FIGS. 8A-8D 10A-1OD representations corresponding to FIGS. 8A-8D, but of an embodiment with angled anti-rotation ribs extending in the radial direction over the annular recess and in the axial direction along the undercut of the punching section,
  • FIGS. 8A-8D but of an embodiment with anti-rotation features formed by grooves or depressions, FIGS.
  • FIGS. 8A-8D representations corresponding to FIGS. 8A-8D, but of an embodiment with a polygonal in plan view annular shape, in the specific case of a square shape,
  • FIGS. 5A-5D are illustrations of a hollow body element according to the invention, which represents a modification of the hollow body element according to FIGS. 5A-5D, wherein FIG. 13A shows a view from below of the free front end of the hollow body element, FIG. 13B shows a sectional drawing corresponding to the sectional plane XI 13B shows an enlarged view of the area XI 1 IC of FIG. 13B and FIG. 13D shows the hollow body element in a perspective view, FIG. 14A-14D, the attachment of the hollow body element according to the invention by a riveting operation to a pre-punched sheet metal part,
  • FIG. 16 is an enlarged view of the central portion of FIG.
  • FIG. 17 shows a longitudinal section through a further progressive composite tool according to the invention, which is similar to the progressive compound tool of FIG. 15, FIG.
  • FIG. 18 is an enlarged view of the central portion of FIG.
  • 19A-19C is a schematic representation of a first rolling mill according to the invention.
  • 20A-20C is a schematic representation of a second inventive rolling mill
  • 21A-21C is a schematic representation of a third rolling mill according to the invention.
  • FIGS. 22A-22D are illustrations of another hollow body element according to the invention, FIG. 22A being a bottom view, FIG. 22B being a sectional view 22A, FIG. 22C is a sectional view corresponding to the sectional plane XXIIC-XXIIC of FIG. 22A, and FIG. 22D is a perspective view of the sectional plane XXIIB-XXIIB of FIG. 22A;
  • FIG. 23A-23D are views for explaining the attachment of the element of Figs. 22A-22D to a relatively thin sheet metal part (Fig. 23A);
  • FIGS. 24A-24D are views similar to FIGS. 23A-23D, but illustrating the attachment of the element to a relatively thick sheet metal part (FIG. 24A); FIGS.
  • 25A-25F is a series of drawings to illustrate the production of the inventive element according to FIGS. 22A-22D,
  • Fig. 26 is a cut in the longitudinal direction of the profile strip
  • Fig. 27 is an enlarged view of the central portion of
  • the longitudinal edges 9 of the profile can be rounded as shown. But they can also have a different shape, such as a chamfer or a rectangular shape.
  • the profile is machined in a follow-on composite tool to form hollow elements, for example, nut elements of substantially rectangular or square shape, manufacture. If the hollow elements are to be realized as nut elements, a thread must be cut or produced in the hole of the hollow body element. This is usually done outside of the progressive tool in a separate machine.
  • the thread only after attachment of the hollow body member to a sheet metal part, for example by means of a thread-forming or thread-cutting screw. Furthermore, it is not necessary to provide a thread in the hollow body element, but the perforation of the hollow body element could serve as a smooth bore for rotatably supporting a shaft or as a plug-in receptacle for receiving a plug pin.
  • a first progressive compound tool 10 which is used to produce hollow body elements from the profile 21 of FIG. 1 or a similar profile, is shown in FIG. 2 in longitudinal section, wherein the longitudinal section is made through the center of the profile.
  • a lower plate 12 which is usually attached to a press table, either directly or indirectly via an intermediate plate, not shown.
  • the lower plate 12 carries a plurality of columns 14, four in this example, two of which are apparent, namely the two columns which lie behind the cutting plane.
  • another plate 16 which is usually attached to the upper die plate of the press or to an intermediate plate of the press.
  • guides 18 are screwed (for example by means of screws, which are not shown here), wherein the guides 18 are designed to slide in accordance with the lifting movement of the press up and down the columns 14.
  • the profile 1 is advanced in the direction of the arrow 20 at each stroke of the press, by an amount equal to twice the longitudinal dimension L of the individual hollow bodies produced from the profile. elements is.
  • the profile 1 is guided with the second broad side 3 upwards through the sequence of the composite tool.
  • the progressive compound tool in this example comprises four workstations A, B, C, D, in which two machining operations are carried out simultaneously with each stroke of the press.
  • a so-called enforcing procedure is carried out as the first step a).
  • a punching operation is carried out in a second step b) and a squeezing operation is carried out in the third workstation C in a third step c).
  • a knock-down punch 22 is used to separate two hollow-body elements from the profile 1 at each stroke of the press.
  • the right side of the punch cuts through the profile at a separation point, which is located behind the first hollow body element, ie the hollow body element 21 in Fig. 3 and at a separation point behind the second hollow body element 21 '.
  • the progressive compound tool is shown in FIGS. 2 and 3 in the closed position, in which the two hollow body elements 21 and 21 'have just been separated from the profile 1.
  • the cam 24 presses on the right side of the nut member 21 and tilts this in the inclined position, which can be seen on the right side of Fig. 3.
  • the nut member 21 drops then on a chute from the work area of the progressive tool and can then be led out, for example, in the position shown in FIG. 2 laterally from the progressive tool, for example about its lateral slide under the action of gravity or with a blast of compressed air, etc.
  • the second hollow body member 21 passeses through a hole 28 in the tee die 30 and then through corresponding bores 32, 34, 36 and 38 formed in plates 40, 42, 44 and 12.
  • the bores or the hole 38 in the plate 12 can be aligned with a further bore (not shown) in the press table or in any intermediate plate provided between the plate 12 and the press table, which allows the removal of the nut elements such as 21 ', for example under the By gravity or by a lateral chute or by applying a blast of compressed air.
  • the plate 44 is bolted to the plate 12 via screws, not shown.
  • the plate 42 consists of a plurality of plate sections, which are assigned to the respective work stations, which are screwed to the continuous plate 44 via further, not shown screws (since arranged outside the plane of the sectional view).
  • the continuous plate 40 is also bolted to the sections of the plate 42, again by means not shown screws.
  • Above the continuous plate 40 are again plate sections 50, 52, 54, 56, 58 and 60, which in turn are bolted to the plate 40.
  • the plate 50 is a support plate, which forms a lower guide for the profile 1, more precisely for the first broad side 2 of the profile 1, which in this illustration shows the underside of the profile 1. forming side.
  • the plate sections 52, 54 and 56 are associated with the work stations A, B and C, while the plate sections 58 and 60, which form a receptacle for the tee die 30, are associated with the workstation D.
  • the parting plane of the follow-on composite tool is located above the profile 1 and is designated T in FIG. 3.
  • plate sections 72, 74, 76, 78 and 80 which are bolted to a continuous plate 82 - again on screws, not shown. Further, the plate 82 is bolted to the upper plate 16.
  • the plates 72, 74, 76, 78 and 80 are thus lifted with the plate 22 and the upper plate 16, so far that the two punch 84, 86 and the two upper Abflachst Zi 88 and 90, such as also the matrices 92 and 94, which cooperate with the enforcing punches 64, 66 and also the tee punches 22 out of engagement with the professional strip 1 arrive.
  • the profile strip 1 can be pushed further by twice the length dimension of the hollow body elements 21 in preparation for the next stroke of the press.
  • workstations A and B have a length dimension, i. in the direction of movement 20 of the profiled strip 1, which corresponds to four times the length dimension of a hollow body element 21.
  • the work station C has a length dimension which corresponds to three times the length dimension of a hollow body element 21, while the work station D has a length dimension which has a multiple of the length dimension of the hollow body element 21, in this example six times.
  • the perforated dies 100, 102 which cooperate with the punches 84, 86 together have a central bore 104 and 106, which are aligned with further bores 108, 110 in insert sleeves 112, 114, the make it possible to dispose of the punched slugs 116, 118. These fall through the bore 108, 114, which are larger in diameter than the bore 104, 106 and through the further holes 120, 122 in the plate 12 downwards and can pass through corresponding passages in the press table or in any intermediate plate provided in the same way as the parent elements 21 'disposed of or discharged.
  • guide elements which may be formed, for example, by cheeks of the plates 50, 52, 54, 56 and 58, which ensure that the profiled strip follows the desired trajectory through the follow-on composite tool. It may be provided a slight lateral clearance, which allows a possible expansion of the profile strip in the transverse direction.
  • a method for producing hollow body elements such as nut elements, for attachment to usually made of sheet metal components is realized.
  • the method is used to produce hollow body elements 21, 21 ', for example with an at least substantially square or rectangular outer contour, by cutting individual elements from a present in the form of a profile bar or a roll profile 1 after prior punching holes 23 in the profile 1, optionally with subsequent formation of a threaded cylinder using a progressive tool with multiple workstations A, B, C, D, in which respective processing is performed.
  • the method is characterized in that in each workstation A, B, C, D for the profile 1 or for a plurality of juxtaposed profiles in each case two machining operations for each stroke of the progressive tool are performed simultaneously. That is, it is basically possible to process several profiles 1 side by side and at the same time in the same progressive tool, provided that the corresponding number of individual tools, such as puncture punches, punches and associated matrices, is present.
  • the knock-off punch 22 cuts through the profile at a first location behind a first hollow body element 21 and at a second location behind a second hollow body element 21 ', wherein the second hollow body element 21' in the direction of the movement of the tee punch transversely to the longitudinal direction of the profile 1 from the movement path of the profile is led out.
  • the first hollow body element 21 is led out in the teetering station of the progressive tool at least for the time being generally in the direction of the movement path of the profile.
  • Each workstation of the follow-on composite tool has a length in the direction of travel of the profile which corresponds to three times or four times or several times the longitudinal dimension of a finished hollow body element 21, 21 '.
  • a spring-loaded cam 27 is biased against the force of a spring means 26 with a cam surface 24 inclined to the trajectory of the profile from the leading edge of the leading end of the profile at the exit end of the last work station. After separation of the formed at the front end of the profile hollow body member 21, this is tilted by the spring-loaded cam down to facilitate removal from the progressive tool.
  • the lower punches 64, 66 for carrying out the puncturing operation and the punches 84, 86 for carrying out the piercing operation operate from opposite sides of the profile 1 on this.
  • respective flattening punches 88, 90 act on the profi strip 1 from above, while the strip is supported in the region of the perforation by a plate section 56.
  • supporting mandrels on the plate section 56 at the locations of the holes in the profiled strip, if necessary, to support the profiled material in this area during the flattening process, for example in order to achieve a more sharp-edged design of the end face of the hollow piercing section.
  • FIGS. 4A-4E and FIGS. 5A-5D the process described so far for producing hollow body elements, such as nut elements, designed for attachment to usually sheet metal components will now be described.
  • this involves a method for producing hollow body elements 200 with an at least substantially square or rectangular outer contour 202 by cutting individual elements from a profile in the form of a profile bar (1, FIG. 1) or a coil after punching holes 204 into the profile, optionally with subsequent formation of a threaded cylinder 206 using a progressive compound tool ( Figures 2, 3) having a plurality of workstations A, B, C and D in which respective processes are performed.
  • a progressive compound tool Figures 2, 3 having a plurality of workstations A, B, C and D in which respective processes are performed.
  • the procedure is characterized by the following steps: a) In a first step, starting from a cross-sectionally rectangular profile 1, Fig. 4A), a piercing operation using the piercing dies 92, 94 coming from above and the piercing punches 64, 66 is performed.
  • the passage leads to a cylindrical recess 208 on a first broad side 2 of the profile 1 and a hollow cylindrical projection 210 on a second, the first broad side 2 opposite broad side 3 of the profile, which is surrounded by an annular recess 212, the in Fig. 4B is shown.
  • the securement strip 1 is pressed onto the ends of the puncturing punches 64 and 66 projecting above the plate section 52.
  • the protruding ends of the puncturing punches have a shape complementary to the shape of the cylindrical recess 208 shown in FIG. 4B.
  • the ends of the dies 92, 94 cooperating with the punch together have a shape complementary to that of the hollow cylindrical projection 210 and the annular recess 212 thereof as shown in FIG. 4B.
  • the hollow cylindrical projection 210 is flattened at its free front end 220 to form an undercut on the outside punching portion 222, whereby the end face 224 is formed in Fig. 4D, which is in a plane parallel to the broad sides 2 and 3 and perpendicular to the central longitudinal axis 226 of the hole 204.
  • the hollow body elements can be separated in the working station D from the profile and then optionally provided with thread 206, as shown in Fig. 4E and in the identical to FIG. 5C.
  • the third step could optionally be combined with step b).
  • the diameter of the cylindrical recess and the inner diameter of the hollow cylindrical projection are at least substantially equal.
  • the mouth 229 of the cylindrical recess 208 is preferably carried out at the first broad side 2 of the profile with a rounded or chamfered inlet edge 230 during the insertion process of step a) or during the punching process of step b) or the flattening process of step c) Elements forms the thread outlet.
  • step a) or the hole process of step b) or the flattening of step c) is preferably also the mouth 232 of the hollow cylindrical projection 210 at its free end with a rounded or chamfered outlet edge 234 provided in the completed element the thread inlet forms.
  • the hole 204 is produced with a diameter which at least substantially corresponds to the diameter of the cylindrical recess 208 and the inner diameter of the hollow cylindrical projection 210. Further, at The first step is performed by a) providing the free end of the hollow-cylindrical projection 210 with a chamfer 236 on the outside.
  • annular recess 212 is provided in this enforcing operation with an annular bottom portion 238 which is at least approximately in a plane parallel to the first and second broad side 2, 3 of the profile strip, on the radially inner side with an at least substantially rounded transition 240 in the outside of the hollow cylindrical projection 210 and on the radially outer side merges into a conical surface 242 having an included cone angle in the range between 60 to 120 °, preferably at about 90 °.
  • transition 243 from the annular portion 238 of the annular recess 212 in the conical surface 242 is rounded, as well as the outlet 245 of the conical surface of the annular recess 212 in the second broad side 3 of the profile.
  • the cone surface 242 may in practice be such that the rounded transition 243 merges tangentially into the rounded outlet 245.
  • the undercut 244 When the undercut 244 is produced, it is formed by a cylindrical part of the hollow cylindrical projection 210 which merges approximately at the height of the second broad side 3 of the profile 1 into a region 246 of the hollow cylindrical projection 210 that is thickened when step c) is carried out Essentially projecting beyond the second broad side 3 of the profile.
  • the thickened portion 246 of the hollow cylindrical projection 210 is at least substantially cone-shaped and diverges away from the first and second broad sides, wherein the cone angle of the thickened portion of the hollow cylindrical projection adjacent to the end face 224 in the range between 30 ° and 70 °, preferably at about 50 ° is.
  • the hollow cylindrical projection 219 terminates at its free end on the outside in a preferably sharp-edged punching edge 250.
  • the annular recess is designed with an outer diameter which is only slightly smaller than the smallest transverse dimension of the rectangular hollow body element in plan view, whereby the annular recess 212 with the second broad side 3 of the profile 1 at the narrowest points in the plane of the second broad side 3 remaining webs 284, 286 in the range of 0.25 to 1 mm, preferably of about 0.5 mm.
  • FIGS. 5E-5I and 5J-5N respectively show substantially the same elements as FIGS. 5A-5D, but with small deviations with respect to the formation of the punching section 222, which in the two versions according to FIGS. 5E-5I and FIG. 5J-5N has an ideal shape.
  • FIGS. 5E-5I and 5J-5N the same reference numerals have been used, which were also used in connection with the previous embodiments. It is understood that the previous description also applies to FIGS. 5E-5I and 5J-5N, respectively. that the earlier description of features with the same reference numerals or for the description of Figs. 5E-5I and 5J-5N applies. This convention is retained in the other figures, so that only essential differences or significant features are described here extra.
  • FIG. 5E shows a bottom view of the lower end face of the punching section 222, i. in the direction of arrow E of Fig. 5H.
  • FIG. 5F is a sectional view corresponding to the vertical sectional plane FF in FIG. 5E, so that in FIG. 5F, the two anti-rotation ribs 272 extending in the axial direction and located at the 12 o'clock and 6 o'clock position in FIG. 5E can each be seen in section.
  • the four other anti-rotation ribs 272 'shown in FIG. 5E can not be seen in either FIG. 5F or FIG. 5G showing a sectional view corresponding to the cutting plane G-G. They can also be detected only hinted in Fig.
  • FIGS. 5H and 51 each show an enlarged view of the areas shown in a dot-dashed rectangle in FIGS. 5G and 5F, respectively. It can be seen from FIGS. 5H to 51 that the lower end face 224 of the punching section 222 is illustrated in the sectional plane by a radius which terminates tangentially at the cutting edge 250.
  • 5D is per se formed by two radii which merge into one another at a turning point, in this example only a very short straight part, which is indicated by the two lines 301 and 303, and which also need not be present in practice, ie the two radii which form the inclined wall of the recess (curved portions 243 and 245), can be instantaneous tangentially merge into each other. Nevertheless, there is an area in the area of the inflection point which can be described as approximately flat, so that the term "at least substantially cronical" is justified. Of course, a clear, strictly cronical area could also be provided.
  • Figures 5J-5N are to be understood in the same way as Figures 5E-5I.
  • the only difference here is that the anti-rotation tabs 272 'in FIG. 5E can not be seen in FIG. 5J, and therefore not because they are actually hidden behind the annular punch edge 250.
  • the anti-rotation lugs 272 can be seen only in Fig. 5K and in Fig. 5N.
  • the diameter of the cylindrical recess 208 is greater than the inner diameter of the hollow cylindrical projection 210.
  • the thread 206 ends in a conical region 262 of a stepped hole 264, which may optionally be used in this example instead of a rounded thread spout (which also in the Execution according to FIGS. 4A to 4C or FIGS. 5A to 5D would be possible).
  • the bottom of the annular recess is formed in this embodiment solely by a rounded transition 243 from the hollow cylindrical projection 210 into the conical surface 242, which would also be possible in the embodiment according to FIGS. 4A to 4E or FIGS. 5A to 5D.
  • step a) by corresponding profiling of the piercing dies 92, 94, anti-rotation features 272 on the outside of the hollow-cylindrical projection 210 or on the inside of the annular recess 212 around the hollow-cylindrical protrusion 210 are provided educated.
  • These anti-rotation features may be formed by ribs 272 and / or grooves (not shown) on the radially outer side of the hollow cylindrical projection 210 (as shown). These ribs 272 extend in the axial direction 226 and bridge the undercut 244 of the hollow cylindrical projection 210. They have a radial width which corresponds at least substantially to between 40% and 90% of the maximum radial depth of the undercut.
  • a hollow body element 200 is produced for attachment to a component 270 (FIG. 7A or FIG. 7B) which is usually made of sheet metal and has an at least essentially square or rectangular shape Outer outline 202, with a first broad side 2 and a second broad side 3, with an undercut 244 having punching portion 246 which projects beyond the second broad side and is surrounded by an annular recess 212 in the second broadside and with a hole 204 extending from the extending the first broad side 2 through the punching section 246, wherein the hole optionally has a threaded cylinder 206 and the hollow body element is characterized in that anti-rotation features 272 outside of the hollow cylindrical projection 210 and / or inside in the region of the annular recess 212 around the hollow cylindrical projection 210 around be formed.
  • the hollow body element is further characterized in that the second broad side 3 is located radially outside the annular recess 212 in a plane, i. Apart from any curves or bevels at the transitions in the side edges of the hollow body member, and thus has no beams, grooves or undercuts in the area outside the annular recess.
  • the annular recess 212 is designed with an outer diameter which is only slightly smaller than the smallest transverse dimension of the rectangular in plan view hollow body element, whereby the annular recess with the second broad side 3 of the profile at the narrowest points 284, 286 in the plane of the second broad side remaining Webs in the range of 0.25 to 1 mm, preferably of about 0.5 mm forms.
  • FIGS. 7A and 7B show one and the same inventive element 200 according to FIGS. 5A to 5D with a thinner sheet metal part (FIG. 7A) of, for example, 0.7 mm thickness and with a thicker sheet metal part (FIG. 7B) of, for example, FIG. 85 mm thickness can be used.
  • the buffing material fills the entire after pressing by means of a die Ring recess 212 and is located on the full surface of the annular recess and the anti-rotation features 272 in the area of the undercut on. In both cases, therefore, a good cover with the anti-rotation ribs 272 and therefore a good anti-rotation between the hollow body member 200 and the sheet metal part 280.
  • the punching section 246, which is at least substantially not deformed in these examples, is self-piercing introduced into the sheet metal part.
  • the flattened end face 224 of the punching section 246 is at the level of the underside of the sheet metal part in thin sheets (as shown in Fig. 7A) and above the underside of the sheet metal part (ie, the side facing away from the body part of the hollow body member) sheet metal part).
  • there is an annular recess 282 around the punching section which is predetermined in its shape by the concrete shape of the complementarily shaped die in the self-piercing attachment of the hollow body element in a press or by a robot or in a C-frame.
  • the die as usual in the self-piercing attachment of fasteners, a central bore, through which the resulting punching is disposed of.
  • the hollow body elements according to the invention are self-piercing, they can still be used in pre-punched sheet metal parts.
  • a further thickness range of sheet metal parts for example 1.85 to 3 mm, can be covered. Only the punching section needs to be made longer.
  • the hollow body elements are square in plan view, no special orientation of the die is required per se with respect to the particular setting head used because the punching section in plan view is circular and therefore orientation-free. It only needs to be ensured that the setting head and the die are coaxial with each other and to the longitudinal axis 226 of the hollow body element.
  • the further component is usually attached below the sheet metal part by a screw (not shown), which is screwed from below into the thread. As a result, the connection between the hollow body element 200 and the sheet metal part is reinforced by tightening the screw.
  • anti-rotation ribs would be conceivable which radially cross the annular recess 212 or bridge over it, as shown for example in FIGS. 8A-8D, 9A-9D or 10A-1OD. Such anti-rotation ribs may be flush with the broad side 3 ( Figures 8A-8D) or recessed within the annular recess (such anti-rotation features are not shown in the drawings).
  • the free upper sides of the anti-rotation ribs lie in the same plane as the surface of the broad side 3 outside the annular recess 212.
  • the sides 272" can also extend from the broad side 3 be arranged back staggered. Since the anti-rotation ribs bridge over the annular recess 212, they can also be found on the side of the annular punching section 222 in the region of the undercut 244.
  • FIGS. 8A-8D the free upper sides of the anti-rotation ribs, which are indicated by 272 ", lie in the same plane as the surface of the broad side 3 outside the annular recess 212.
  • the sides 272" can also extend from the broad side 3 be arranged back staggered. Since the anti-rotation ribs bridge over the annular recess 212, they can also be found on the side of the annular punching section 222 in the region of the undercut 244.
  • FIGS. 9A-9C show a further variant in which the anti-rotation features are in the form of anti-rotation ribs which extend in the radial direction over annular recess 212, only the upper sides 272 '' of the anti-rotation ribs 272 of the embodiment according to FIGS. 9D inclined so that they rise in the direction of the punching section 222 rising and therefore not only extend in the radial direction over the annular recess and bridge it, but also in the axial direction of the undercut 244 of the punching section 222 over a considerable length or in the full length of the undercut 244 extend.
  • FIGS. 1 OA-1OD show an embodiment which is very similar to that of FIGS. 9A-9D, except that here the anti-rotation ribs are angled so that they have a radial portion 272 '"and an axial portion 272' '' facing one another are over a radius 272 "" "passing and therefore have the overall discussed the angled shape.
  • FIGS. 1A-1 ID show another type of anti-rotation feature, here in the form of depressions 272 '' '' or grooves formed in the oblique side wall of the annular recess 212, the depressions 272 '' '' here in plan view have an approximately cup-like shape.
  • Other shapes of the depressions are conceivable, for example elongated grooves, which are narrower in the region of the broad side 3.
  • Figs. 12A-12D show a slightly different shape of a hollow body member.
  • the ring here a polygonal shape 212 ' has, in the concrete case a square shape in plan view, wherein the annular recess has a corresponding number, ie four, inclined surfaces 400, 402, 404 and 406 by means of radii 408, 410, 412 and 414 merge into each other.
  • the annular recess 212 ' which is polygonal in plan view, there is a surface region which is defined by four corner regions 416, 418, 420 and 422 and is arranged in a plane perpendicular to the central longitudinal axis 226 of the element.
  • Punching section 222 transitions over a radius 424 into these corner regions, the radius at the radially outermost point having a diameter which is slightly larger than the maximum transverse dimension of the surface region formed by the four corners 416, 418, 420 and 422 that this radius eventually merges into the bottom of the four sloping surfaces. All thin parallel lines such as 426, 426 'and 426 "show radii or rounded surfaces which provide, inter alia, for a gentle bending of the sheet metal part.
  • the rounded areas between the inclined surfaces also have the advantage that there are no pronounced sharp features at these locations in the sheet-metal part, which can lead to fatigue, in particular dere with dynamic load of the component. Since the punching section 222, as in the other embodiments, generates a circular hole in the sheet metal part, no stress concentrations are to be expected here, which can lead to fatigue cracks during operation.
  • the element When attaching the hollow body member to a sheet metal part, the element is at least substantially not deformed, deformation is undesirable, and the sheet metal part is formed by a suitable complementary shape of the die in the square recess 212 'in the area around the punching portion 222 and completely in Plant brought with this punching section around the punching section around.
  • the hollow body member is planar on the first broad side 2, i. with an end face which is perpendicular to the central longitudinal axis 226 of the element, according to the previous embodiment of Figs. 5A-5N.
  • the corresponding front side could be formed similarly to the embodiment according to FIG. 6D.
  • the first manufacturing step a) according to claim 1 can be replaced here by a molding process in which the hollow cylindrical projection 210 is effected solely by material displacement from the region of the polygonal ring recess in plan view and in the region of the hollow cylindrical projection 210.
  • the body thus formed is then pierced through from the first broad side 2 to the bottom 216 of the cavity 232.
  • annular recess 212 need not necessarily be simultaneous with the piercing operation, but could be combined with the piercing or flattening process, i. the punches 84, 86 and the flattening dies 88, 90 would have to have a corresponding shape in this case.
  • the profile can be maintained or used after production of the general shape of the hollow body elements in sections or in rewound form, with a separation into individual hollow body elements takes place only when the profile in a setting head for attachment of the hollow body elements is used on a component.
  • FIG. 13A to 13D there is shown a hollow body member corresponding to the member of Figs. 5A to 5D, except for the fact that the pilot member, i. the hollow projection 210, here without undercutting is executed.
  • the axial anti-rotation ribs 272 can be better seen, since they are not hidden in an undercut, but protrude in the radial direction from the hollow cylindrical projection 210 here.
  • the thread in the hollow body elements according to the invention ends immediately before the hollow cylindrical projection, i. does not extend into the hollow cylindrical projection, since otherwise it would be deformed during the forming of the hollow cylindrical projection or rivet portion 210, which would make the introduction of a screw difficult or impossible.
  • hollow body element according to the invention has been described only in connection with a modification of the embodiment according to FIGS. 5A to 5D, all embodiments of hollow body elements described so far, ie inter alia the hollow body elements of FIGS. 5E to 5N, of FIGS. 6A to 6E, FIGS. 8A to 8D, the 9A to 9D, FIGS. 10A to 10D, of FIGS. 1A to 1D and FIGS. 12A to 12D, are made into hollow body members according to the present invention by omitting the undercut of the hollow projection 210 so as to make a cylindrical one
  • projection is formed with the configurations of the respective anti-rotation characteristics of the aforementioned figures.
  • the hollow cylindrical projection forming the rivet section is crimped by means of the rivet die 504 to the rivet bead 506, which surrounds the sheet metal part in the edge region of the perforation 500 in a between the Nietbördel 506 and the bottom surface of the annular recess 212 formed in the broad side 3 annular groove 508 receives by clamping.
  • the hollow cylindrical projection of the hollow body element according to the invention is not provided with an undercut, it can still be self-piercing attached to a sheet metal part, if this is done in two stages.
  • a first stage or station the hollow cylindrical projection is used with a suitable punching die, which is arranged on the other side of a sheet metal part to a hole in the sheet metal part punching and punching through the middle passage of the punching die (not shown).
  • the hollow body element in the sheet metal part "hang", due to the hole reveal of the hollow cylindrical projection or the anti-rotation features or ribs, if they engage in the hole edge.
  • the rivet section formed by the hollow cylindrical projection is crimped to a rivet bead with a suitable rivet die, such as, for example, the rivet die of FIG. 14C.
  • the shape of the hollow body element according to the invention also makes it possible to simplify the follow-on composite tool. Since the undercut on the hollow projection is missing, the previously third station C of the follow-on composite tool, in which the flattening of the hollow projection to the undercut, no longer required so that this station can be omitted with a corresponding simplification of the progressive tool.
  • the resultant shape of the progressive dies is shown in FIGS. 15 and 16.
  • the previously used reference numerals of Figs. 2 and 3 have been used in Figs. 15 and 16 where appropriate and will not be further described, since the previous description also applies to these corresponding features or parts.
  • This simplification means that only one forming station (station A) is required, namely the station where the wrapping process takes place, at which an elongation, ie an elongated extension of the profile strip, which is undesirable, can take place. In the remaining stations B and D, in which the punching process or the singling process take place, there is no elongation of the profile strip. These operations in the workstations B and D mean that the corresponding workstations B and D are not considered to be forming stations. A further simplification of the follow-on composite tool is possible and indeed the enforcement process can take place outside the follow-on composite tool, for example in a rolling mill corresponding to FIGS. 19A to 19C or FIGS. 2OA to 2OC or FIGS.
  • the rolling mill can be coupled with the progressive tool, in the sense that the rolling mill feeds the profile strip directly to the follow-on composite tool. This is not required.
  • the rolling mill can provide a profile strip with the necessary enforcements as an intermediate, which can be fed in lengths or in the form of a roll to the progressive die. The rolling can be done in a different factory than the further production in the progressive tool. If the penetration station is not present in the progressive tool, then no forming station is present and the problem of elongation no longer exists. This represents an optimal solution.
  • the follow-on composite tool is designed as shown in FIGS. 17 and 18.
  • the previously used reference numerals of Figs. 2 and 3 have been used where appropriate in Figs. 17 and 18 and will not be further described, since the previous description also applies to these corresponding features or parts.
  • the rolling mill is designed to produce from an incoming profile strip 1 with an at least substantially rectangular cross section with a first broad side 2 and an opposite broad side 3 an outgoing profile strip 1 'of regularly alternating profile sections, the incoming Strip for the progressive tool of Fig. 17 and 18 forms.
  • the outgoing profile strip 1 'of alternating profile sections which consist of first profile sections, which have at least substantially the cross-sectional shape of the incoming profile strip 1, and second profile sections, which are made of the incoming profiled strip 1 and each have a cylindrical recess 208 at the first broad side and a hollow cylindrical, surrounded by an annular recess 212 projection 210 on the second broad side 3 have.
  • the rolling mill consists of a first roller 600 and a second roller 602 which are disc-shaped, but only portions of which are shown, in a perspective view in Fig. 19A, partly in a side view and in a radial sectional plane in Fig. 19B and in an enlarged view in the region of the nip in FIG. 19C (the drawings of FIGS. 2OA to 2OC and 2A to 2C are drawn respectively).
  • the rollers 600 and 602 are synchronized with each other and run in opposite directions of rotation 604 and 606.
  • the incoming profile strip 1 is formed in a gap region 608, ie in the nip 610, between the rollers.
  • the first roller 600 has a plurality of regularly spaced-apart projections 612 having a shape complementary to that of the cylindrical recess 208.
  • the second roller 602 also has a plurality of mold portions 614 arranged at the same intervals as the projections of the first roller, each having a central portion, a shape 616 complementary to the shape of the hollow cylindrical projections 210, and a the central portion surrounding annular projection 618 having a shape which is complementary to the shape of the hollow cylindrical projection 210 surrounding annular recess 212.
  • the rollers are similarly configured except that a molding protrusion such as 618 of Fig.
  • annular recess 212 which is desired for the hollow body elements, must be produced in the progressive tool, for example.
  • the protrusions 612 of the first roll 600 and the mold portions 614 of the second roll 602 have clearances such as 620, i. a somewhat spherical shape, which differs from a circular cylindrical shape, which ensure that a clean rolling movement takes place in the rollers, i. no collisions of the rollers with the profile strip when leaving the expiring ProfiistMake can take place.
  • the volume of profile strip material displaced by each projection of the first roller should advantageously at least substantially correspond to the material volume of the material displacement on the side of the second roller, i. the volume, which is composed as follows: the volume of the hollow cylindrical projection 210 plus the volume of a bottom portion of the projection extending beyond the second broad side and minus the volume of any surrounding annular recess 212.
  • the projections 612 of the first roller 600 and / or the moldings 614 of the second roller can be replaced by respective inserts of the respective Gen rollers 600 and 602 are formed, as shown in FIGS. 19 to 21, wherein only in Fig. 2 IA to 2 IC, the mold parts 614 are not realized as inserts.
  • inserts facilitates the replacement of worn or broken inserts without having to replace the entire roller
  • the present invention is intended for the production of rectangular or square elements in the outer contour, it could also be used for the production of polygonal, oval or circular elements in the outer contour or of another shape, provided the tools used are designed to be the profile strip to produce the desired contour shape, for example by the use of appropriately designed punching tools.
  • a method for producing hollow body elements 200 for attachment to components usually made of sheet metal 280, in particular for the production of hollow body elements with an at least substantially square or rectangular outer contour 202, by cutting individual elements from one in the form of a Profile bar 1 or a roll present profile after pre-punching holes 204 in the profile, optionally with subsequent formation of a threaded cylinder 206 using a progressive tool 10 with multiple workstations A, B and D or B and D, in which respective operations are performed.
  • the process according to the invention is characterized by the following steps:
  • a penetration process is performed, which leads to a cylindrical recess 208 at a first broad side second the profile and a hollow cylindrical projection 210 on a second of the first width side 2 opposite broad side 3 of the profile leads, which is surrounded by an annular recess 212,
  • the penetration process can, as explained above, in the progressive tool or in an upstream operation, for example in a rolling mill, take place.
  • the diameter of the cylindrical recess 208 and the inner diameter of the hollow cylindrical projection 210 should be at least substantially equal.
  • a hole 204 is preferably produced with a diameter which corresponds at least substantially to the diameter of the cylindrical recess 208 and the inner diameter of the hollow cylindrical projection 210.
  • an annular elevation 260 can be formed on the first broad side (2) of the profile around the cylindrical depression 208.
  • anti-rotation features 272 can be formed on the outside of the hollow cylindrical projection 210 and / or on the inside in the region of the annular recess 212 around the hollow cylindrical projection 210.
  • the anti-rotation features may be formed by ribs 272 and / or grooves on the radially outer side of the hollow cylindrical projection 210.
  • the anti-rotation features are preferably formed by ribs 272 extending axially along a portion of the hollow cylindrical projection 210 between the bottom of the annular recess 212 and a location between the second broad side 2 of the profile and the free front end of the hollow cylindrical projection.
  • the anti-rotation ribs 272 may have a radial width that corresponds at least substantially in the range between 40% and 90% of the maximum radial depth of the undercut 244.
  • step a) also starting from a rectangular in cross-section profile 1, a molding operation can be performed in which on the first broad side 2 of the profile 1 optionally no cylindrical recess 208 is provided, but on the second broad side 3 of the profile 1 to a preferably polygonal in plan view, in particular square recess 212 'on the second Broad side 3 of the profile that surrounds the hollow cylindrical projection 210, which is partially formed from the material displaced by the formation of the recess 212 'and partially from the displaced by the formation of the cavity of the hollow cylindrical projection 210 material, wherein the recess 212' with one or more obliquely provided to the central longitudinal axis of the hollow body member annular surface or surfaces is provided and in the second step b) the material between the first broad side 2 of the profile 1 and the bottom 216 of the hollow cylindrical projection 210 to form a through hole 204th pierced or punched out.
  • the anti-rotation features are preferably formed by ribs 272 and / or grooves on the radially outer side of the hollow cylindrical projection 210.
  • the anti-rotation features may be formed by ribs 272 extending in the axial direction along the hollow cylindrical projection 210.
  • the anti-rotation ribs 272 may have a radial width which is at least substantially in the range between 10% and 60% of the wall thickness of the hollow cylindrical projection 210.
  • the anti-rotation features may also be provided in the form of radially extending ribs bridging the annular recess. An embodiment of this type is shown in FIGS. 22A-22D, which will be explained in more detail later.
  • anti-rotation features can be provided in the form of inclined anti-rotation ribs extending in the radial direction over the annular recess and in the axial direction along the hollow cylindrical projection.
  • anti-rotation features can be provided in the form of depressions, which are arranged in the inclined surface of the annular recess.
  • the second broad side 3 is preferably located radially outside the annular recess 212 in a plane, i. Apart from any curves or chamfers at the transitions in the side edges of the hollow body member, and thus has no beams, grooves or undercuts in the area outside of the annular recess 212.
  • the annular recess 212 is preferably made with an outer diameter which is only slightly smaller than the smallest transverse dimension of the in plan view rectangular hollow body member 200, whereby the annular recess with the second broad side of the profile at the narrowest points in the plane of the second broadside remaining webs in the range of 0.25 and 1 mm, preferably of about 0.5 mm.
  • the invention provides a hollow body element for attachment to a usually consisting of sheet metal component 280, with a particular at least substantially square or rectangular outer contour, with a first broad side 2 and a second broad side 3, with a hollow cylindrical projection, over the second broad side 3 and surrounded by an annular recess 212 'in the second broad side and with a hole 204 which extends from the first broad side 2 through the hollow cylindrical projection or through the punching section 210, wherein the hole optionally has a threaded cylinder 206, and the element is characterized in that the annular recess 212 'in plan view is polygonal and in particular square, and that the annular recess 212' is provided with one or more obliquely to the central longitudinal axis of the hollow body member surface or surfaces and the hollow cylindrical projection 210th no e has undercut.
  • An assembly part according to the invention consists of a hollow body element 200 of the abovementioned type according to the invention, which is attached to a component, for example a sheet metal part 280, wherein the material of the component or the sheet metal part 280 on the surface of the annular recess 212 of the hollow body element, on the surface of Anti-rotation features 272 as well as on the surface of the flanged to a Nietbördel hollow cylindrical projection 210 is applied.
  • a component for example a sheet metal part 280, wherein the material of the component or the sheet metal part 280 on the surface of the annular recess 212 of the hollow body element, on the surface of Anti-rotation features 272 as well as on the surface of the flanged to a Nietbördel hollow cylindrical projection 210 is applied.
  • the axial depth of the annular groove 282 in the sheet metal part depending on the length of the hollow cylindrical projection 210 and the thickness of the sheet metal part 280 is selected so that the Nietbördel does not or only slightly protrudes beyond the side of the sheet metal part, which faces away from the body of the hollow body member 200 and in the region below the second broad side 3 of the hollow body element around the annular recess 212 of the hollow body element is present.
  • the second broad side 3 of the hollow body element 200 in the region around the annular recess 212 of the hollow body element 200 is preferably at least substantially not or at most slightly pressed into the sheet material.
  • a follow-on composite tool for producing hollow body elements 200, such as nut elements, for attachment to components usually made of sheet metal 280, in particular for producing hollow body elements with an at least substantially square or rectangular outer contour 202, by cutting individual elements from one in the form of a profile bar or a Wickels present profile 1 after prior punching of holes 204 in the profile, optionally with subsequent formation of a threaded cylinder 206, wherein in each workstation for the profile or for several juxtaposed profiles each two treatments for each stroke of the progressive tool are simultaneously feasible, characterized characterized in that in a workstation (B) a hole process and in a downstream workstation (D) the separation of two hollow body elements of the or each profile by means of the Abschlagstemp els is feasible.
  • an enforcing process can be carried out, for example to form a cylindrical recess 208 on a first broad side of a cross-sectionally at least substantially rectangular profile 1 and a hollow cylindrical, surrounded by an annular recess 212 projection on a second the first broadside opposite broad side of the profile.
  • the piercing operation for piercing a remaining after the piercing operation between the bottom of the cylindrical recess 208 and the central passage of the hollow cylindrical projection web is performed.
  • the follow-on composite tool is designed in a variant to work with an incoming profile strip 1 with an at least substantially rectangular cross-section with a first broad side 2 and an opposite broad side 3, consisting of regularly alternating profile sections of the profile strip 1 and profile sections, from the Profi strips 1 are produced and each having a cylindrical recess 208 on the first broad side and a hollow cylindrical, surrounded by an annular recess 212 projection 210 on the second broad side 3.
  • FIGS. 22A-22D Such a design of a hollow body element 200 is shown in FIGS. 22A-22D.
  • the only significant difference from the element of FIGS. 13A-13D is that the anti-rotation ribs 272, as shown here, bridge the annular groove 212 in the radial direction, with the material containing the anti-rotation ribs 272 therein Design forms over clear radii in the rivet section 210 and in the bottom area and in the outer oblique side of the annular recess 212 passes.
  • the upper sides of the anti-rotation ribs 272 in Fig. 22D are slightly set back from the second broad side 3 of the element, but can also lie flush with this side.
  • the inner cylindrical side 288 of the cylindrical rivet portion 210 has an inner diameter which is slightly larger than the outer diameter of the thread 206, on the one hand in the riveted state, the insertion of a screw in the thread 206, in Fig. 22C
  • the inner diameter 288 forms the thread inlet via a conical region 288 "and merges into the thread, which also serves to center a screw when it is inserted into the thread 206.
  • the radius on the outside of the cylindrical rivet portion 210 is somewhat more pronounced than in the embodiment of FIGS. 13A-13D.
  • the inner cone-shaped surface 288 ' is smaller. Here it is shown slightly rounded, but it could also be performed in a conventional manner as a cone-shaped cutting surface.
  • FIG. 22C the anti-rotation ribs 272 on the left and right of the cylindrical rivet section are shown in an oblique side view, with the hatched representation representing a perspective view of the radii with which the material of the anti-rotation ribs 272 behind the plane of the cross-sectional view of FIG. 22C lie, in the inclined surface of the axial groove or the annular recess 212 passes.
  • a possible way of attaching the hollow body element according to FIGS. 22A-22D to a sheet metal part is in the drawings of FIGS. 23A-23D for a relatively thin sheet metal part 280 'and in FIGS. 24A-24D for a shown relatively thick sheet metal part.
  • the attachment itself is similar to the method already described in connection with FIGS.
  • the elevation 512 in plan view also ensures a visually appealing transition of the lower side of the hollow body element 200 into the sheet metal part 280 '.
  • one and the same hollow body element 200 can be used with sheet metal parts 280 'of different thicknesses and yet ensures a high-quality connection to the sheet metal part 280'.
  • a sheet thickness range between, for example, 0.6 mm and 3.5 mm (without limitation) cover.
  • the underside of the sheet metal part in the region of the element and the underside of the Nietbördeis 506 lies with the underside of the sheet metal part outside of the element in a plane, which is favorable for the screwing of another component on the underside of the sheet metal part. This can be achieved no matter what thickness of the sheet metal part is within the allowable range for the once fixed length of the rivet section.
  • the method for producing the hollow body element 200 according to FIGS. 22A-22D largely corresponds to the previously described method and will now be explained in more detail briefly with reference to FIGS. 25A-25F and 26 and 27, respectively.
  • the profile strip from which the elements are made is a substantially rectangular strip, but the side surfaces 7 and 8 are slightly skewed relative to each other, i.e., in the direction shown in Figs. are inclined, in such a way that they have from one another in the region of the first broad side 2 of the profile a smaller distance than in the region of the second broad side 3 of the profile.
  • Fig. 25B shows the profile strip after performing the clinching operation, in which the cylindrical recess 208 is formed with radius 230 in the first broad side 2 of the profile and the cylindrical rivet portion 210 and the surrounding annular groove 212 generates in the second broad side 3 of the profile becomes.
  • the anti-rotation ribs 272, which bridge the annular groove 212 are also produced in this first forming step.
  • notches, such as 514 are generated in the broad side 3 of the profile strip, which run perpendicular to the longitudinal direction of the profile strip, ie from one narrow side 7 to the other narrow side 8.
  • notches form weakenings which facilitate the later separation of the individual elements from the profiled strip. They form in Fig. 25B, the boundary of the shown middle part of the strip, which later forms a hollow element such as 200, where left of the left notch 514 part of another hollow body member and right of the right notch 514 part of a still further hollow body member 200 to see is.
  • the follow-on composite tool for fabricating the element of FIGS. 22A-22D corresponds to the fabrication steps illustrated and described in FIGS. 25A-25F and is shown in FIG. 26 and the major portion of the progressive tool on a large scale in FIG ,
  • the progressive tool of Figures 26 and 27, respectively, generally corresponds to the progressive tool of Figures 15 and 16 and, as explained above, the same reference numerals are used for corresponding parts or parts having the corresponding functions.
  • the follow-on composite tool according to FIGS. 26 and 27 essentially only the significant differences compared with the follow-on composite tool according to FIGS. 15 and 16 or the other follow-on composite tools already described are mentioned.
  • the puncturing punches 64, 66 below the profile strip 1 and the corresponding Matrices 92, 94 are arranged above the profile strip 1, in the example in FIGS. 26 and 27, the puncturing punches 64, 66 are arranged above the profile strip 1, while the corresponding dies 92, 94 are located below the profile strip.
  • the support of the piercing dies 92, 94 is somewhat different in the embodiment according to FIGS. 26 and 27, respectively, than in the embodiment according to FIGS. 15 and 16.
  • the dies are arranged in a fixed position in the lower die.
  • the purpose of the previously mentioned inclined arrangement of the side surfaces 7 and 8 of the profile strip is that the profile strip is stretched in the upper region adjacent to the cylindrical cavity 208 generated by the puncturing punches 64, 66 by the puncturing punches 64, 66 in the width, whereby the narrow sides 7 and 8 assume a position perpendicular to the upper and lower broad sides 2 and 3, which then ensure proper guidance of the profile strip on the way through the progressive tool.
  • the punches 84 and 86 are arranged above the profile strip 1, while the corresponding dies 100, 102 are located below the profile strip 1.
  • two expansion dies 704, 706 are provided, which serve to stretch the cylindrical rivet section 210 and the end formation of the expanded hollow cylindrical section 288 with the conical section 288 ", which forms the threaded inlet, and To define the cone-shaped or rounded inlet region 288 'below the profile strip, above the profile strip there are then two punches 700, 702 which are inserted into the profile strip already formed cylindrical recess 208 engage when closing the press and intercept the forces acting from the Aufweitmatrizen 704, 706 in the direction of the longitudinal axis 226 of the individual hollow body elements.
  • They can also be used for correcting the shape of the hollow body element in the region of the thread outlet and / or for calibrating the inner diameter of the region 208 or the through hole 204 before carrying out the threading process, which only after separation of the individual elements from the profile strip by the knock-stamp 222 and removal of individual hollow body elements takes place from the press.
  • the small surveys at reference numeral 708 are observed. These bumps serve to form notches such as 514. Note also the item numbered 710. This is a position sensor that dips into a cylindrical cavity 208 to ensure that the profile strip has been processed properly so far and is in the right place in the progressive tool.
  • the probe 710 does not dip into such a cavity 208 at the intended amount every stroke of the press, it encounters, for example, the upper broad side 2 of the profile strip adjacent to such a cavity or in the absence of such a cavity because it simply does not exist, For example, since the puncturing punches 64, 66 are worn or broken, the feeler 710 is displaced upward against the force of the spring 714 acting on the collar 712 of the probe 710 when closing the press, coming close to the force of the spring 714 Proximity sensor 716, which emits a corresponding signal that serves to immediately stop the press. The cause of the fault can then be investigated and the press put back into service after the required correction or repair has been carried out.
  • the upper tool must be raised so far that the puncture punches 64, 66, the probe 710, the punches 84, 86 and the Abstützstempel 700, 702 and the tee punches 22 come free from the top 2 of the profile strip, said the profile strip must be raised to the extent that it comes free of projecting parts of the lower tool, such as the fürrißmatrizen 92, 94, the notch-generating projections 708, the Lochmatrizen 100, 102 and the fixed Aufweitmatrizen 704, 706 and the tee die 30.
  • each station corresponds to a length which is an integer multiple of the length of a single hollow body member 200. It will be here, as shown in the drawings, several empty stations provided to create space for the individual tools of progressive die tool.
  • the present invention is intended for the production of rectangular or square elements in the outer contour, it could also be used for the production of polygonal, oval or circular elements in the outer contour or of another shape, provided the tools used are designed to be the profile strip to produce the desired contour shape, for example by the use of appropriately designed punching tools.

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Abstract

L'invention concerne un procédé de production d'éléments à corps creux (200), tels que des éléments d'écrou destinés à être fixés sur des composants généralement en tôle (280), en particulier un procédé de production d'éléments à corps creux présentant un profil extérieur (202) au moins sensiblement carré ou rectangulaire. Ce procédé consiste à découper des éléments individuels dans un profilé se présentant sous la forme d'une barre profilée (1) ou d'un rouleau après formation préalable de trous (204) dans le profilé par poinçonnage, un cylindre fileté (206) étant ensuite éventuellement formé au moyen d'un outil à suivre composé (10) comprenant plusieurs postes de travail. L'invention se caractérise en ce qu'un processus de perçage et un processus de poinçonnage sont mis en oeuvre dans les postes de travail. L'invention concerne également des éléments à corps creux (200), des pièces d'assemblage, des outils à suivre composés (10) et des laminoirs (600, 602).
EP06753856.1A 2005-05-25 2006-05-24 Procede de production d'elements a corps creux, element a corps creux, piece d'assemblage, outil a suivre compose pour produire des elements a corps creux et laminoir Not-in-force EP1871553B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005024220A DE102005024220A1 (de) 2005-05-25 2005-05-25 Verfahren zum Herstellen von Hohlkörperelementen, Hohlkörperelement, Zusammenbauteil, Folgeverbundwerkzeug zum Herstellen von Hohlkörperelementen sowie Walzwerk
PCT/EP2006/004977 WO2006125634A1 (fr) 2005-05-25 2006-05-24 Procede de production d'elements a corps creux, element a corps creux, piece d'assemblage, outil a suivre compose pour produire des elements a corps creux et laminoir

Publications (2)

Publication Number Publication Date
EP1871553A1 true EP1871553A1 (fr) 2008-01-02
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US (5) US8123446B2 (fr)
EP (1) EP1871553B1 (fr)
JP (2) JP5208731B2 (fr)
KR (1) KR101366602B1 (fr)
CN (4) CN102554110B (fr)
BR (1) BRPI0609931A2 (fr)
CA (2) CA2609689C (fr)
DE (1) DE102005024220A1 (fr)
ES (1) ES2470334T3 (fr)
MX (1) MX2007014684A (fr)
RU (1) RU2414985C2 (fr)
WO (1) WO2006125634A1 (fr)

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Also Published As

Publication number Publication date
JP2012192458A (ja) 2012-10-11
WO2006125634A1 (fr) 2006-11-30
US8123446B2 (en) 2012-02-28
RU2414985C2 (ru) 2011-03-27
MX2007014684A (es) 2008-01-28
RU2007148446A (ru) 2009-06-27
CN101947631A (zh) 2011-01-19
US8534973B2 (en) 2013-09-17
CN101947631B (zh) 2012-06-06
CN101954440A (zh) 2011-01-26
CA2864261C (fr) 2016-10-04
KR101366602B1 (ko) 2014-02-24
CN102554110A (zh) 2012-07-11
US8398348B2 (en) 2013-03-19
US8690693B2 (en) 2014-04-08
US20080187408A1 (en) 2008-08-07
US20120142440A1 (en) 2012-06-07
JP5208731B2 (ja) 2013-06-12
JP2008542028A (ja) 2008-11-27
CN102554110B (zh) 2016-03-02
CA2864261A1 (fr) 2006-11-30
US8434985B2 (en) 2013-05-07
CA2609689C (fr) 2015-02-17
US20120141224A1 (en) 2012-06-07
JP5706854B2 (ja) 2015-04-22
DE102005024220A1 (de) 2006-11-30
KR20080015879A (ko) 2008-02-20
ES2470334T3 (es) 2014-06-23
US20120148366A1 (en) 2012-06-14
US20120148370A1 (en) 2012-06-14
CA2609689A1 (fr) 2006-11-30
EP1871553B1 (fr) 2014-04-23
CN101198426A (zh) 2008-06-11
CN101954440B (zh) 2012-03-21
BRPI0609931A2 (pt) 2011-10-11

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