Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
  • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
  • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
  • B23P19/06—Screw or nut setting or loosening machines
  • B23P19/062—Pierce nut setting machines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J15/00—Riveting
  • B21J15/02—Riveting procedures
  • B21J15/025—Setting self-piercing rivets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J15/00—Riveting
  • B21J15/10—Riveting machines
  • B21J15/36—Rivet sets, i.e. tools for forming heads; Mandrels for expanding parts of hollow rivets
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B17/00—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation
  • F16B17/006—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation of rods or tubes to sheets or plates
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
  • F16B5/04—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting

Definitions

• the invention relates to a device for inserting an auxiliary joining part into a workpiece, with a stamp for pressing the auxiliary joining part into an upper side of the workpiece, wherein the auxiliary joining part has a shank to be pressed into the workpiece with a circular circumference with a first, maximum diameter, with a Die for contacting an underside of the workpiece while the auxiliary joining part is being pressed in, the die having a contact area and a recess surrounded by the contact area, with an edge of the recess deviating from a circular shape, with the sections of the edge of the edge lying furthest to the outside in the radial direction Recess lie on an imaginary perimeter and where in the radial direction the innermost sections of the edge of the recess lie on an imaginary inscribed circle, the edge of the recess having at least three projections protruding into the perimeter of the recess and the projections touching the inscribed circle hear.
• a device for inserting an auxiliary joining part into a workpiece is known from the international published application WO 2011/009850 A1.
• the auxiliary joining part has a circular circumference with a head and a punched section.
• the auxiliary joining part is pressed into an unperforated metal sheet using a stamp.
• a circumferential punching edge of the auxiliary joining part punches a slug out of the workpiece.
• a die is applied to an underside of the workpiece, which die has a recess and a flat contact area surrounding the recess.
• the recess is designed as a through-opening and accommodates the punching slug created when the auxiliary joining part is pressed in.
• the recess has three projections projecting into an imaginary perimeter of the recess.
• An outer diameter of the auxiliary joining part in the punching section corresponds to the diameter of the perimeter of the recess.
• the projections touch an imaginary inscribed circle that is smaller than the outer diameter of the punched section of the auxiliary joining part.
• the projections deform the punched edge of the auxiliary joining part in sections.
• an undercut is formed between the auxiliary joining part and the workpiece.
• the auxiliary joining part is used to attach other workpieces. For example, an auxiliary joining part made of steel is stamped into an aluminum sheet and fastened there. Another workpiece made of steel can then be welded to the auxiliary joining part.
• the invention is intended to improve a device for inserting an auxiliary joining part into a workpiece, a method and an arrangement such that a center offset between auxiliary joining part and die does not lead to disadvantages when anchoring the auxiliary joining part in the workpiece.
• a device for inserting an auxiliary joining part into a workpiece with a punch for pressing the auxiliary joining part into an upper side of the workpiece the auxiliary joining part having a shank to be pressed into the workpiece with a circular circumference with a first, maximum diameter, and with a Die provided for contacting an underside of the workpiece while the auxiliary joining part is being pressed in, the die having a contact area and a recess surrounded by the contact area, with an edge of the recess deviating from a circular shape, with the outermost points of the edge in the radial direction of the recess lie on an imaginary perimeter and where the innermost points of the edge of the recess in the radial direction lie on an imaginary inscribed circle, the edge of the recess having at least three projections protruding into the perimeter of the recess and the projections touch circle, in which a diameter of the inscribed circle is between 4% and 10% smaller than the first diameter of the auxiliary joining part and in which a diameter
• each projection is formed between two side boundaries that are part of the edge of the recess, with the side boundaries of each projection enclosing an angle of 40° to a maximum of 180°.
• the angle is measured at the point of the projection that is furthest to the inside, that is, for example, at the inscribed circle. For example, the angle is measured at the top of a ledge and the side boundaries then extend from that point.
• the side boundaries of the projections are convex.
• the innermost point of the protrusion may be part of a curved line, particularly a portion of a circle.
• the angle between the two side boundaries of the protrusion is 180°.
• the side boundaries of each projection are concave.
• the side boundaries are sections of a polylobular profile of the edge of the recess.
• a polylobular gradient is a non-circular gradient that has small-radius, large-curvature sections and large-radius, small-curvature sections, with equal numbers of large-curvature and small-curvature sections, and each with a large-curvature section is located between two sections of small curvature.
• the polylobular curve has three regions of large curvature and small radius and three regions of small curvature and large radius. The three regions with a large curvature and a small radius are then spaced apart from one another, for example by 60°, as seen over the circumference, as are the three regions with a small curvature and a large radius. The three areas of large curvature and small radius then touch the perimeter, whereas the three areas of small curvature and large radius touch the incircle of the recess.
• the edge of the recess is formed by means of a plurality of adjacent sections of two polylobular peripheral lines.
• the sections with a smaller radius and larger curvature of the two polylobular peripheral lines are put together.
• the edge of the recess then consists of a plurality of arcuate sections which are placed together and which each form an inwardly projecting projection at the connection points.
• a section of the first polylobular peripheral line with a smaller radius and greater curvature adjoins a section of the second polylobular peripheral line with a larger radius and smaller curvature.
• connection points between a section of the first polylobular perimeter line and a section of the second polylobular perimeter line touch the inscribed circle of the recess and thereby form the innermost of the projections.
• Inward projections with concave side boundaries are formed from the perimeter of the recess.
• the first polylobular peripheral line and the second polylobular peripheral line are offset from one another by a predefined angle, in particular 60°, about the central longitudinal axis of the recess.
• the two polylobular peripheral lines each have three areas with a large curvature and a small radius and three areas with a small curvature and a large radius.
• the two polylobular peripheral lines each have an imaginary circumference, with the diameters of the circumferences being unequal.
• the diameters of the circles differ by 3% to 10%.
• the diameters of the circles are 10.5 mm and 10.8 mm.
• the maximum diameter of the auxiliary joining part on the shaft is 10.5 mm.
• the side boundaries of each projection enclose an angle of more than 150°.
• the diameter of an imaginary circumference of the recess is between 10 mm and 11.6 mm and is in particular 10.8 mm.
• the recess is designed as a through-opening through the die and is provided for discharging a slug produced when the auxiliary joining part is pressed in.
• the edge of the recess can be sharp-edged, beveled or rounded.
• a sharp-edged edge is formed at the transition between two, in particular, flat surfaces.
• a chamfer can form a beveled edge.
• a radius of curvature results in a rounded edge.
• the die has an embossing ring facing the underside of the workpiece, the inner edge of which forms the edge of the recess and which protrudes from the rest of the upper side of the die facing the underside of the workpiece, is at the same height as the upper side of the die or is recessed from the top of the die.
• a secure anchoring of the auxiliary joining part in the workpiece can be achieved by means of such an embossing ring.
• the height of the embossing ring compared to the remaining upper side of the die facing the underside of the workpiece is 0.3 mm, for example, and is advantageously in a range between 0.1 mm and 1 mm.
• the embossing ring can also be flush with the upper side of the die or lie below the upper side of the die.
• a height or a level of the embossing ring is constant when viewed over its circumference and a width of the embossing ring, measured in the radial direction parallel to the upper side of the die, changes over the circumference.
• a width of the stamping ring changes between 0.4 mm and 1 mm, for example.
• an outer edge of the embossing ring is circular.
• the invention also relates to a method for inserting an auxiliary joining part into a workpiece with a device according to the invention, wherein the application of a die to an underside of the workpiece, the placement of the auxiliary joining part on an upper side of the workpiece, the pressing of the auxiliary joining part by means of a punch into the upper side of the Workpiece, the punching out of a slug from the workpiece while the auxiliary joining part is pressed in by means of the auxiliary joining part and the deformation of the auxiliary joining part by means of a contact area of the die is provided.
• the invention also relates to an arrangement with an auxiliary joining part and a device according to the invention. Further features and advantages of the invention result from the claims and the following description of preferred embodiments of the invention in connection with the drawings. Individual features of the different, illustrated and described embodiments can be combined in any way without going beyond the scope of the invention. This also applies to the combination of individual features without other individual features with which they are shown or described in connection.
• the drawings show:
• FIG. 1 shows a sectional representation of a device according to the invention according to a first embodiment
• Fig. 2 shows an enlarged detail of Fig. 1,
• Fig. 3 shows a further enlarged detail of the die 14 of Fig. 2,
• Fig. 5 is a plan view of the auxiliary joining part of Fig. 4,
• FIG. 6 is a view of an auxiliary joining part and the matrix of the device of FIG. 1 from above, at an angle,
• FIG. 7 shows a schematic sectional view of the auxiliary joining part and the matrix of FIG. 6,
• FIG. 8 shows a further sectional view of the auxiliary joining part and the matrix of FIG. 6,
• Fig. 9 is a sectional plan view of the die of Fig. 3,
• FIG. 10 shows a plan view of a matrix according to a further embodiment of the invention.
• FIG. 11 shows a sectional plan view of a matrix according to a further embodiment of the invention.
• FIG. 12 shows a sectional view of the matrix of FIG. 11 from above
• Fig. 13 is a plan view of the die of Fig. 3,
• Fig. 14 is a view on section plane A-A in Fig. 13,
• FIG. 15 shows the detail X from FIG. 14 in an enlarged view
• FIG. 16 shows the detail F from FIG. 13 in an enlarged representation.
• FIG. 1 shows sections of a device 10 according to the invention for inserting an auxiliary joining part, not shown in FIG. 1, into a sheet-like workpiece 8 shown schematically in FIG. 1.
• Sheet metal material is generally provided as the workpiece.
• an auxiliary joining part made of steel is inserted into an aluminum sheet in order to then be able to fasten another workpiece made of steel to the auxiliary joining parts by spot welds, in order to be able to connect the aluminum sheet to the further workpiece made of steel.
• the workpiece 8 is usually not pre-punched.
• the device 10 has a C-frame 12, which is connected to a machine base, not shown, and which carries a die 14 on its lower leg, shown in Fig. 1, and which has a stamp 16 on its upper leg, shown in Fig. 1 connected is.
• the plunger 16 is actuated by means of a cylinder 18, for example a pneumatic cylinder, which is only partially shown in FIG.
• An auxiliary joining part is fed in by means of a feeding device 20 and then pressed into the workpiece 8 with the punch 16 .
• the workpiece 8 is arranged between the die 14 and the punch 16 before the auxiliary joining part is pressed in.
• Fig. 2 shows an enlarged detail of Fig. 1.
• the die 14 can be seen, onto which the workpiece 8 is then placed, as well as a hold-down device 6, which is lowered onto the workpiece 8 after the workpiece 8 has been pushed in and the workpiece 8 then holds onto the die 14.
• a through hole is provided in the hold-down device 6 , in which the auxiliary joining part is then pushed by the punch 16 in the direction of the workpiece 8 .
• FIG. 3 shows sections of the die 14 from FIG. 2.
• the die 14 has a recess 26 with an edge 28, the edge 28 not being circular but being polylobular.
• the rim 28 is trilobular. This means that it has three regions of large curvature, each spaced 120° apart, and three regions of small curvature, also spaced 120° apart. The areas with large curvature adjoin one another. To the Inwardly protruding projections or edges are formed at each transition, which can be seen in FIG. 3 .
• the die 14 also has a bearing area 24 with a raised stamping ring 40 .
• the embossed ring 40 protrudes beyond the rest of the contact surface 24 and surrounds the recess 26.
• an outer circumference of the embossed ring 40 is circular, an inner circumference of the embossed ring 40 is formed by the edge 28.
• the embossing ring 40 can protrude beyond the contact surface 24 , which forms the upper side of the die in sections, can be arranged at the same height as the contact surface 24 or can be arranged below the contact surface 24 .
• FIG. 4 shows an auxiliary joining part 22 that can be pressed into a workpiece 8 with the device of FIG.
• the auxiliary joining part 22 is circular and has a shank 23 and a head 25 .
• the head 25 has a larger diameter than the shank 23 .
• a punching section 27 of the auxiliary joining part 22 which is cylindrical and which forms the maximum diameter of the shank 23 .
• the diameter of the cylindrical, circular punching section 27 is decisive for a deformation of the auxiliary joining part 22 at the end remote from the head by means of the die 14.
• Fig. 6 shows the die 14 with an auxiliary joining part 22 placed on the die 14. It can be seen that the auxiliary joining part 22 has the head 25 and the shank 23, the head 25 having a larger outer diameter than the shank 23 and both the head 25 and the shank 23 have a circular outer circumference.
• the auxiliary joining part 22 is pressed into the unperforated workpiece 8, specifically an unperforated metal sheet, by means of the punch 16.
• the auxiliary joining part 22 punches a through-opening in the workpiece with its shank, and a punched slug produced is received by a recess in the die 14 .
• a lower end of the shaft of the auxiliary joining part 22 comes into contact with the embossing ring 40 of the die 14 and is thereby plastically deformed by further pressing in of the punch.
• an undercut is formed between the auxiliary joining part 22 and the workpiece, so that the auxiliary joining part is then securely connected to the workpiece.
• Fig. 7 shows a schematic sectional view of the die 14 and the auxiliary joining part 22 of Fig. 6.
• the sectional plane lies directly above the embossing ring 40.
• the auxiliary joining part 22 and the sectional plane are shown as translucent, so that the outer circumference of the auxiliary joining part 22 in the punching section 27 and the edge 28 of the recess 26 are shown superimposed. It can be seen that a total of three crescent-shaped overlapping surfaces 41 result between the underside of the punched section 27 and the embossing ring 40 .
• overlap areas lie radially outward of the portions of the rim 28 of small curvature.
• the outer circumference of the punched section 27 of the auxiliary joining part 22 lies within the edge 28 of the recess.
• the auxiliary joining part 22 is not deformed by the embossing ring 40 in these areas.
• the edge 28 can be sharp, beveled or rounded.
• FIG. 7 shows the situation when the auxiliary joining part 22 is arranged exactly centrically to the central longitudinal axis of the recess 26 of the die 14 . If a center offset between the auxiliary joining part 22 and the embossing ring 40 of the die 14 occurs during series production, which in principle cannot be avoided in all cases, the amount of overlap between the auxiliary joining part 22 and the embossing ring 40 increases. The crescent-shaped overlapping sections 41 are then no longer of the same size but of different sizes. Overall, however, the overlapping area increases, so that the auxiliary joining part is still reliably deformed and the auxiliary joining part 22 is consequently also securely anchored in the workpiece 8 .
• FIG. 8 shows another sectional view of the matrix 14 and the auxiliary joining part 22 in the state of FIG. 6.
• the sectional plane runs in FIG. 6 through the central longitudinal axis of the recess 26 of the matrix 14, in FIG. 6 from bottom left to top right.
• the die 14 and the auxiliary joining part 22 have been rotated in order to show a better view of the cutting plane.
• the punched section 27 does not touch the edge 28 of the recess 26 on the edge of the auxiliary joining part 22 on the left in FIG.
• FIG. 8 shows a slight penetration of the auxiliary joining part 22 and the embossing ring 40, which is only used for clarification and would not occur in reality.
• FIG. 9 shows a sectional plan view of the die 14.
• the die 14 has the contact area 24 which surrounds the recess 26.
• FIG. The recess 26 is designed as a through opening (see also FIGS. 13 to 16) and has the polylobular edge 28 .
• the polylobular edge 28 has three sections 30 spaced 120° apart with a large radius of curvature and small curvature and three sections 32 also spaced 120° apart from one another with a small radius of curvature and consequently large curvature.
• the small curvature sections 30 and the large curvature sections 32 are each spaced 60° apart.
• the edge 28 of the recess touches an imaginary perimeter 34 of the recess, with the outermost points of the sections 32 having large curvature touching the perimeter 34, respectively.
• the imaginary perimeter 34 has a diameter of 10.8 mm.
• the innermost points of the sections 30 with a small curvature each touch an imaginary inscribed circle 36.
• the sections 30 with a small curvature thus form inward projections protruding into the free space formed by the recess 26.
• the inscribed circle 36 has a diameter of 10.1 mm.
• Each of the projections formed by the sections 30 has a point 38 that protrudes furthest into the interior of the recess 26 .
• Side boundaries are arranged on both sides of this point 38 and are concave in the illustrated polylobular shape of the edge of the recess 26 .
• the two side boundaries, which run towards point 38, have an angle of 180° to one another at point 38.
• the matrix 14 is provided for inserting an auxiliary joining part with a circular circumference, see the auxiliary joining part 22 in Fig. 2.
• An outer diameter on the shaft of the auxiliary joining part 22 then lies between the diameter of the inscribed circle 36 and the circumscribed area 34.
• the diameter of the Shank of the auxiliary joining part 22 at 10.5 mm.
• the auxiliary joining part 22 is only deformed by the sections 30 with a small curvature when it is centered exactly in the middle.
• the sections 32 with a large curvature lie largely outside the circumference of the auxiliary joining part. This situation changes when the auxiliary joining part is no longer centered exactly in the middle of the recess 26 .
• the overlapping area between the auxiliary joining part and the die 14 increases as the center offset of a circular auxiliary joining part to the die 14 increases. Reliable anchoring of the auxiliary joining part 22 in the workpiece is thereby achieved even with a center offset.
• the die 14 has the embossing ring 40, the inner boundary of which is formed by the edge 28 of the recess 26 and the outer circumference of which is circular. See also FIGS. 14 and 15 , the embossing ring 40 is raised relative to the rest of the contact surface 24 of the die 14 .
• the height of the embossing ring 40 compared to the rest of the contact area 24 of the die 14 is about 0.3 mm.
• FIG. 10 shows a sectional plan view of a die 44 according to another embodiment of the invention.
• the die 44 has a recess 26 which has an edge 28 which is formed by three circular line sections, between which a radially inwardly projecting projection 46 is arranged.
• the three projections 46 are each spaced 120° apart.
• the projections 46 touch an imaginary inscribed circle 36 with their most inward point.
• the perimeter 34 has a diameter of 10.8 mm.
• the inscribed circle 36 has a diameter of 9.7 mm.
• the diameter of auxiliary joining part 22, which is inserted and pressed into a sheet-like workpiece by means of die 44, is 10.5 mm, as in the embodiment already explained, and is therefore between the diameter of inscribed circle 36 and the diameter of perimeter 34 of recess 26.
• the projections 46 are rounded at their most inwardly projecting point.
• an overlapping area between the auxiliary joining part 22 and the die 44 increases as the center offset of the auxiliary joining part to the recess 26 increases.
• FIG. 11 shows a sectional plan view of a die 54 according to another embodiment of the invention.
• the recess 26 of the die 54 has an edge 28 formed by the superposition of two polylobular perimeter lines.
• the rim 28 is defined by three concavely curved sections 56 of large curvature and three concavely curved Sections 58 are formed with a smaller curvature, with each section 58 being arranged between two sections 56 .
• Sections 56 form part of a first polylobular perimeter having three regions of high curvature and three regions of low curvature. Sections 56 form the regions of high curvature of the first polylobular perimeter.
• Regions 58 form part of a second polylobular perimeter having three regions of high curvature and three regions of low curvature. Regions 58 form the regions of high curvature of the second polylobular perimeter.
• FIG. 11 shows that an imaginary circumference 34 of the recess 26 touches the first sections 56 but not the second sections 58. At the apex of the first sections 56, these have a radius of 10.8 from a central longitudinal axis 60 of the recess 60 mm up. At the apex of the second sections 58, these are at a distance from the central longitudinal axis 60 of 10.5 mm.
• the die 54 is provided for the insertion of an auxiliary joining part 22 with a shank diameter of 10.5 mm.
• An inwardly projecting projection is formed at the transition between the first sections 56 and the second sections 58, the point 62 at which the two sections 56, 58 adjoin one another being located furthest inwards.
• the edge 28 of the recess touches an imaginary inscribed circle 36.
• the imaginary inscribed circle 36 has a diameter of 10.1 mm.
• Concave side boundaries are arranged on both sides of the points 62 in each case.
• the edge 28 of the recess 26 thus has six inwardly protruding projections, the innermost points of which are each formed by the points 62 . These projections are delimited on both sides by concave side borders. If the auxiliary joining part is placed exactly centrically to the recess 26, the auxiliary joining part is deformed by the matrix 54 only in the vicinity of the points 62. As the center offset of the auxiliary joining part 22 increases, the overlapping area between the auxiliary joining part 22 and the die 54 increases. As a result, a secure anchoring of the auxiliary joining part 22 in the workpiece can also be achieved in the event of a central offset of the auxiliary joining part 22 in relation to the die 54, which cannot be avoided in series production. Like the die 14 of FIG. 3, the die 54 includes a die ring 64 having an inner edge defined by the edge 28 of the recess 26 and having a circular outer edge.
• the width of the stamping ring 64 changes over the circumference of the stamping ring 64. This is also the case with the stamping ring 40 of FIG.
• FIG. 12 shows the die 54 of FIG. 11 in sections in a view obliquely from above.
• the recess 26 is deep enough to be able to accommodate a punched slug that occurs when the auxiliary joining part 22 is inserted.
• the recess 26 is designed as a through opening.
• the embossing ring 40 can be seen, which is raised by 0.3 mm compared to the rest of the upper side of the die 14 in the illustrated embodiment.
• the circular outer edge of the embossing ring 40 is beveled, with the bevel having an angle of about 45°.
• the maximum first diameter of the auxiliary joining part i.e. the maximum diameter of the shaft of auxiliary joining part 22 and generally the diameter of the punched section at the lower end of the auxiliary joining part, is between the diameter of an imaginary incircle of edge 28 of the recess and the imaginary diameter Perimeter of the recess is.
• a diameter of the inscribed circle is between 4% and 10% smaller than the maximum first diameter of the auxiliary joining part and a diameter of the circumference between 2% and 5% larger than the first diameter of the auxiliary joining part 22.
• the first diameter of the auxiliary joining part is 10.5 mm in each case.
• the diameter of the imaginary inscribed circle 36 is 9.7 mm for the die 44 according to FIG. 10, and 10.1 mm for the dies 14 and 54 of FIGS.
• the diameter of the imaginary circle 34 is 10.8 mm for the matrices 14, 44 and 54 in each case.
• the table below gives values for the overlapping area between the auxiliary joining part 22 and the matrices 14, 44, 54 for different directions of the center offset and different geometries of the edge 28 of the respective recess.
• the overlapping area between the shaft of the auxiliary joining part and the die increases with increasing center offset of the auxiliary joining part Central longitudinal axis of the recess in the die, regardless of the direction of the center offset.
• the auxiliary joining part is no longer deformed symmetrically to the central longitudinal axis of the die in the event of a center offset. Since the overlap area increases, there is greater deformation at least in sections in the edge area than with zero offset. This ensures that the auxiliary joining part is always securely anchored in the workpiece, even if there is an unavoidable center offset.
• the device according to the invention and the method according to the invention can thus ensure a process-reliable insertion of auxiliary joining parts into workpieces.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Forging (AREA)
• Shaping Metal By Deep-Drawing, Or The Like (AREA)

Applications Claiming Priority (2)

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• 2020
  • 2020-08-27 DE DE102020210839.0A patent/DE102020210839B4/de active Active
• 2021
  • 2021-08-09 US US18/023,134 patent/US20240238921A1/en active Pending
  • 2021-08-09 KR KR1020237010527A patent/KR20230058453A/ko unknown
  • 2021-08-09 WO PCT/EP2021/072127 patent/WO2022043037A1/de active Application Filing
  • 2021-08-09 EP EP21758369.9A patent/EP4204180A1/de active Pending
  • 2021-08-09 CN CN202180052709.4A patent/CN116323092A/zh active Pending

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