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
  • B23P19/10—Aligning parts to be fitted together
• • 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
  • B23P19/001—Article feeders for assembling machines
  • B23P19/006—Holding or positioning the article in front of the applying tool
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B10/00—Drill bits
  • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
  • E21B10/58—Chisel-type inserts
• • 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
  • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
  • F16B19/04—Rivets; Spigots or the like fastened by riveting
  • F16B19/08—Hollow rivets; Multi-part rivets
  • F16B19/083—Self-drilling 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
  • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
  • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
  • F16B25/0094—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw the screw being assembled or manufactured from several components, e.g. a tip out of a first material welded to shaft of a second material
• • 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
  • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
  • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
  • F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action

Definitions

• the invention relates to a self-drilling fastening element with a shaft and a cutting plate which is prefabricated separately from drilling steel or hard metal and is mounted at one end of the shaft and which, in the assembled state, has a fastening section received in the shaft and a cutting section projecting freely over the end of the shaft.
• These cutting tips are inserted in the shaft of a fastening element in a form-fitting and / or non-positive manner, the correct position of these cutting tips being essential. It is based on an exact axis alignment, i.e. pay attention to an exact alignment to the longitudinal axis of the shaft of the fastening element, in order to thereby eliminate vibrations during subsequent use. For example, in a self-drilling fastener, the cutting tip may pull out if the cutting tip and the shank of the fastener are not precisely aligned.
• the grooves, holes or elevations provided on or in the fastening section of the cutting tip cannot serve for centering during the assembly process, because the fastening section has to be inserted into the slot in the shaft of the fastening element, cannot be recorded for centering purposes.
• Thickenings, which are provided on the cutting tip in order to achieve better heat dissipation in the cutting edge area, are also unsuitable for centering during the assembly process.
• VDI directive never specifies that if there is no perforation, blind perforation can be provided for centering. Such blind perforation would, however, in turn not be available for the centering process during assembly, since it would also be provided in the fastening section in order to be able to center the cutting tip when machining it.
• the object of the invention is to design the cutting tip in the case of a self-drilling fastening element of the type mentioned at the outset in such a way that it can be gripped in a precise position during the mounting of corresponding grippers and inserted in the shaft of the fastening element in exact alignment.
• the embodiment of the invention can be advantageous, in which a different number of recesses is provided on the two broad or narrow sides of the cutting tip. This then means two different rent grippers, which can grip the cutting tip. This is Ausge ⁇ staltung especially if it daily on ei p exact Mon ⁇ arrives a cutting tip advantageous in which always the same page of the same Breit ⁇ up or should face down.
• the recess (s) in the embodiment of the invention is or are cylindrical, spherical, conical, truncated, pyramid or truncated pyramid-shaped.
• the recess (s) in the embodiment of the invention is or are cylindrical, spherical, conical, truncated, pyramid or truncated pyramid-shaped.
• openings which pass through the cutting tip in the embodiment of the invention according to claim 5 these are circular or elliptical or polygonal in cross section. If, in the embodiment of the invention according to claim 7, these openings are rectangular, trapezoidal or elliptical in cross-section, then only one opening is sufficient, since even then, the gripping plate can be precisely aligned by appropriate design of the grippers.
• FIG. 1 shows a front view of an embodiment of a cutting tip
• FIGS. 2 to 4 each show a section along the line II in FIG. 1 with different recess variants; 5 shows a front view of a further embodiment of a cutting tip;
• 9 and 10 show two embodiments of grippers for holding the cutting tip during the assembly process with inserted cutting tip
• FIGS. 13 to 17 show various further embodiments of cutting tips, partially shown in the use position in a shaft
• 20 and 21 are a front view and a partially cut-away side view of the cutting tip used in the self-drilling rivet according to FIGS. 18 and 19.
• the cutting tip 1 according to FIGS. 1 to 4 has a fastening section 15 with an extension 2 and a cutting section 16 with a cutting edge 3 on the opposite side.
• the extension 2 serves to insert the cutting tip 1 into an opening on a self-drilling fastening element.
• recesses in the form of recesses 4 on one or both sides or in the form of a continuous opening 14 are formed on the cutting section 16 which projects freely above the end of the shaft 8 in the assembled state.
• corresponding depressions 4 are provided on both broad sides of the cutting tip 1 and in the embodiment according to FIG. 4 only on one broad side.
• a continuous opening 14 is formed in the embodiment according to FIG. 3.
• FIG. 3 In the embodiment according to FIG.
• the recesses 4 formed on both sides are arranged qleichachsiq qeqen lying one above the other.
• the cutting tip 1 has a wedge-shaped edge region at its mounting end, this design serving for special mounting in a slot of a self-drilling fastening element.
• circular recesses 4 or a continuous opening 14 are provided in cross-section, two recesses 4 or openings 14 being arranged in succession transversely to the axial direction 17 of the cutting tip 1. With such an arrangement, centering mounting of the cutting tip 1 by means of grippers is also possible.
• recesses of the same design in the form of depressions 4 or openings 14 are provided on the two broad sides of the cutting tip 1. It would also be conceivable to provide a different number of recesses on the two broad sides of the cutting tip 1, or else a different arrangement of the same, so that they do not lie opposite one another on the same axis.
• the depression 4 is, for example, spherical.
• the depressions can also be cylindrical, truncated, truncated, pyramid or truncated pyramid-shaped.
• the through openings 14 can also be designed in cross-section in a wide variety of ways, it being expedient to choose a circular or elliptical or polygonal cross-section.
• the cross section of the opening 14 is expediently rectangular, trapezoidal or elliptical in shape, in order to achieve a centering possibility by appropriately designing the grippers.
• FIG. 9 and 10 a schematic representation of such grippers 6 can be seen.
• These grippers 6 have elevations 7 corresponding to the recesses 4 or openings 14 to be corresponding, so that the cutting tips 1 can be held in a form-fitting and precisely aligned manner when they are installed between two grippers.
• 11 and 12 a cutting tip 1 is shown in the assembled state on a self-drilling screw. The cutting tip 1 is inserted into a corresponding slot at the free end of the shaft 8.
• a trapezoidal recess 4 or a corresponding continuous opening 14 is provided in order to be able to mount the cutting tip 1 in an exact axial alignment with the shaft 8.
• the cutting tip 1 is inserted into the slot on the shaft 8 by a snug fit or press fit, so that a correct alignment of the cutting tip 1 with respect to the shaft 8 is already ensured after this assembly. Whether this type of fastening is sufficient or whether the cutting plate 1 is finally fixed by additional deformations on the shaft 8 or by soldering, welding or gluing, the exact alignment of the two parts with respect to one another is always ensured.
• an additional opening 10 is provided in its fastening section 15, into which the end region of the shaft 8 is pressed for the positive mutual connection between the cutting plate 1 and the shaft 8. It can be seen from this that this additional opening 10 cannot serve as an assembly aid, since this opening 10 comes to rest in the end region of the shaft 8 and does not lie in the cutting section 16 of the cutting tip 1 which projects freely over the end of the shaft in the assembled state.
• Two continuous openings 14 or corresponding depressions 4 are again provided as assembly aids.
• Two openings 14 are provided here, which are arranged in succession in the axial direction 17 of the cutting tip 1.
• FIG. 14 shows an embodiment of a cutting tip 1 which is inserted into a shaft 8, the opening 14 provided here or a corresponding recess 4 being trapezoidal in cross section.
• an opening 14 with a rectangular cross section is again provided on the broad side of the cutting tip 1, recesses 11 being provided in the fastening section 15 of the cutting tip 1 opposite the cutting edge 3. can be seen which are used for subsequent positive and non-positive connection with the shaft 8.
• a partial region of the shaft 8 is then pressed into these depressions 11. Only the continuous opening 14 shown is relevant as an assembly aid.
• a cutting-like projection 9 is provided, which is in the bottom of the slot provided in the shaft 8 penetrates for additional fixation of the cutting tip 1.
• a self-drilling rivet 12 in which a cutting tip 1 is used as the drilling element.
• a corresponding slot is provided, in which the cutting tip 1 is inserted in a positive and / or non-positive manner.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
• Environmental & Geological Engineering (AREA)
• Fluid Mechanics (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Drilling Tools (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6399463

Family Applications (1)

Country Status (3)

Families Citing this family (5)

Citations (1)

Family Cites Families (5)

• 1990
  • 1990-02-05 DE DE19904003375 patent/DE4003375C1/de not_active Expired - Fee Related
  • 1990-12-21 AU AU70792/91A patent/AU7079291A/en not_active Abandoned
  • 1990-12-21 WO PCT/EP1990/002292 patent/WO1991011630A1/de unknown

Patent Citations (1)

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