EP3680040B1 - Multifunktionaler fliessbohrer - Google Patents

Multifunktionaler fliessbohrer Download PDF

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Publication number
EP3680040B1
EP3680040B1 EP18789472.0A EP18789472A EP3680040B1 EP 3680040 B1 EP3680040 B1 EP 3680040B1 EP 18789472 A EP18789472 A EP 18789472A EP 3680040 B1 EP3680040 B1 EP 3680040B1
Authority
EP
European Patent Office
Prior art keywords
segment
friction
drilling
calibration
multioperation
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.)
Active
Application number
EP18789472.0A
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English (en)
French (fr)
Other versions
EP3680040A1 (de
Inventor
João Paulo DAVIM TAVARES DA SILVA
Carlos Henrique LAURO
António José FONSECA FESTAS
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.)
University of Aveiro
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University of Aveiro
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Publication date
Application filed by University of Aveiro filed Critical University of Aveiro
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Application granted granted Critical
Publication of EP3680040B1 publication Critical patent/EP3680040B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/063—Friction heat forging
    • B21J5/066—Flow drilling

Definitions

  • the present disclosure relates to a friction drilling multioperation tool allowing three different final operations to be performed in the same drilling: drilling, calibration and threading.
  • the friction drilling tool of the present disclosure has, in one embodiment, a drilling or self-piercing segment, a calibration segment, a thread-opening segment and a stop segment.
  • the calibration segment allows calibrated holes to be obtained, if that is the final objective, or preparing the hole for a thread-opening operation in the material drained on the walls of the already-calibrated hole, depending on the user's choice.
  • CN265257 discloses a friction drilling tool, however it is limited to drilling holes by friction.
  • US2017106430 discloses a friction drilling tool which is a bolt using the friction drilling method for drilling and threading. In general, existing tools mainly drill and/or thread.
  • US3429171 on which the preamble of claim 1 is based, discloses a friction drilling tool provided with a drilling, a calibrating and a threading segment.
  • Friction drilling is a method that uses a hardened conical tipped cylindrical tool which, when pressed under rotation against the workpiece, the friction generated between the workpiece and the tool allows generating the necessary heat to reduce the mechanical strength of the metal material, allowing the conformation thereof by draining.
  • Friction drilling is applied to thin plates, pipes or workpieces of reduced thickness mainly of aluminium and steel. This technology makes it possible to substantially reduce the manufacturing time in an ecological way since not producing chips.
  • the present disclosure relates to a friction drilling method which uses a hardened conical tipped cylindrical tool pressed under rotation against the workpiece.
  • the friction generated between the workpiece and the tool allows generating the necessary heat to reduce the mechanical strength of the metal material, allowing the conformation thereof by draining.
  • the present description presents a cylindrical friction drilling tool containing a friction drilling or self-piercing segment, a calibration segment, a thread-opening segment and optionally a stop segment.
  • the friction drilling is applied to thin plates, pipes or workpieces of reduced thickness mainly of aluminium and steel.
  • This technology makes it possible to substantially reduce the manufacturing time in an ecological way since not producing chips.
  • This technology can be applied to CNC machines, possibly with appropriate variations.
  • the present description relates to a multioperation friction drilling tool that can use three active functions, drilling, calibration and threading.
  • the calibration segment has a length of at least twice the diameter of the calibration.
  • the calibration segment allows calibrated holes to be obtained, if that is the final objective, or preparing the hole for a final threading operation in the material drained on the walls of the already-calibrated hole, depending on the user's choice on the depth of operation of the tool, respectively the depth corresponding to the calibration and drilling segments and the depth corresponding to the thread-opening, calibration and drilling segments.
  • a multioperation friction drilling tool which sequentially comprises a support body or segment, a thread-opening segment, a calibration segment of predetermined diameter and a friction drilling or self-piercing segment.
  • One embodiment comprises a cylindrical stop-spacer segment having a diameter larger than those of the other segments.
  • the friction drilling or self-piercing segment has a pointed shape, in particular a tip with a particularly double-conical configuration.
  • the friction self-piercing segment has a conical tip or a rounded crown tip.
  • the friction self-piercing segment has a tip and, adjacent to said tip, a substantially frustoconical, substantially hyperboloid or substantially trumpet-shaped subsegment.
  • said subsegment is substantially hyperboloid.
  • the length of the drilling or self-piercing segment is identical to the length of the calibration segment.
  • the length of the thread-opening segment is identical to the length of the calibration segment.
  • One embodiment comprises, immediately following one another, i.e. adjacent and sequentially, the thread-opening segment, the calibration segment and the friction drilling (or self-piercing) segment.
  • One embodiment comprises, immediately following one another, i.e. adjacent and sequentially, the stop-spacer segment, the thread-opening segment, the calibration segment and the friction drilling segment.
  • the present disclosure relates to a multioperation friction drilling tool allowing three different final operations to be performed in the same drilling: drilling, calibration and threading.
  • the friction drilling tool of the present disclosure has a drilling segment, a calibration segment, a thread-opening segment and a stop segment.
  • the calibration segment allows calibrated holes to be obtained, if that is the final objective, or preparing the hole for a thread-opening operation in the material drained on the walls of the already-calibrated hole.
  • Figure 1 shows the schematic representation of the multioperation friction drilling tool consisting of a cylindrical support body or segment 1 , a pointy drilling segment 5 with hardened double-tapered tip which, when pressed under rotation against the relevant material, creates sufficient friction for performing drilling, a cylindrical calibration segment 4 containing a specific diameter to ensure calibration of the hole, a thread-opening segment 3 of the specific shape for opening a thread in the previously drilled and calibrated material and a cylindrical stop or spacer segment 2 having a diameter larger than the other segments.
  • Figure 2 illustrates the sequential representation of a possible application of a multioperation friction drilling tool, where the beginning of the friction drilling by the drilling segment (A), (B) and (C) is observed. Subsequently and due to the existence of the calibration segment, the hole calibration (D) is undertaken. If desired at this stage, the tool can be removed thus leaving a calibrated hole without a thread as shown (E) . If a calibrated and threaded hole (G) is desired, the tool continues until the thread-opening segment (F) is reached. The stop or spacer segment limits the stroke of the tool (F) .
  • the calibration zone allows calibrated holes to be obtained, if that is the final objective, or preparing the hole for a final threading operation.
  • the multioperation friction drilling tool begins to drill the hole using the double-tapered special tip.
  • the friction generated between the workpiece and the tool allows generating the necessary heat to reduce the mechanical strength of the material, allowing the conformation by draining the hole.
  • the calibration segment is then operable to obtain calibrated holes, if that is the final objective, or to prepare the hole for an operation 4 , and thereafter, if so desired, operates the final threading segment 3 in the material drained on the walls of the already-calibrated hole.
  • the operation can continue until the stop-spacer segment 2 is reached.
  • the drilling tool described in the present disclosure can be used for drilling/calibration/threading thin plates, pipes, thin workpieces made of metal material (aluminium, steels, etc.), in particular in drilling/calibration/threading operations in aluminium thin plates.
  • the drilling tool described in the present disclosure has advantages both at the manufacturing time and at an ecological level, as it does not produce chips or outer burr, allowing a calibrated or threaded hole to be undertaken more efficiently.
  • One embodiment of the friction drilling multioperation tool sequentially comprises a plurality of distinct axial segments: a support segment 1 , a thread-opening segment 3 , a calibration segment 4 of predetermined diameter and a friction self-piercing segment 5 .
  • One embodiment comprises a cylindrical stop-spacer segment 2 having a diameter larger than those of the other segments 3, 4, 5 of the tool.
  • the friction self-piercing segment 5 has a conical tip or a rounded crown tip.
  • the friction self-piercing segment 5 has a tip and, adjacent to said tip, a substantially frustoconical, substantially hyperboloid or substantially trumpet-shaped subsegment.
  • said subsegment is substantially hyperboloid.
  • the calibration segment 4 has a length of at least twice the diameter of the calibration segment.
  • the length of the friction self-piercing segment 5 is identical to the length of the calibration segment 4 .
  • the length of the thread-opening segment 3 is identical to the length of the calibration segment 4 .
  • One embodiment comprises, adjacent and sequentially: the thread-opening segment 3 , the calibration segment 4 and the friction self-piercing segment 5 .
  • One embodiment comprises, adjacent and sequentially: the stop-spacer segment 2 , the thread-opening segment 3 , the calibration segment 4 and the friction self-piercing segment 5 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling And Boring (AREA)

Claims (10)

  1. Multifunktionaler Fliessbohrer, umfassend eine Vielzahl aufeinanderfolgender unterschiedlicher axialer Segmente: ein Tragsegment (1), ein gewindeöffnendes Segment (3), ein Kalibrierungssegment (4) mit einem im Voraus festgelegten Durchmesser und ein selbstbohrendes Friktionssegment (5), dadurch gekennzeichnet, dass das Kalibrierungssegment (4) eine Länge von mindestens dem doppelten Durchmesser des Kalibrierungssegments (4) aufweist.
  2. Multifunktionaler Fliessbohrer nach dem vorangehenden Anspruch, umfassend ein zylinderförmiges Anschlag-Abstandshalter-Segment (2), dessen Durchmesser größer als der Durchmesser der anderen Werkzeugsegmente ist.
  3. Multifunktionaler Fliessbohrer nach einem der vorangehenden Ansprüche, wobei das selbstbohrende Friktionssegment (5) eine konische Spitze aufweist.
  4. Multifunktionaler Fliessbohrer nach Anspruch 1 oder 2, wobei das selbstbohrende Friktionssegment (5) eine abgerundete Kronenspitze aufweist.
  5. Multifunktionaler Fliessbohrer nach einem der vorangehenden Ansprüche, wobei das selbstbohrende Friktionssegment (5) eine Spitze und, anschließend an die genannte Spitze, ein im Wesentlichen kegelstumpfförmiges, im Wesentlichen hyperboloides oder im Wesentlichen trompetenförmiges Teilsegment aufweist.
  6. Multifunktionaler Fliessbohrer nach dem vorangehenden Anspruch, wobei das genannte Teilsegment im Wesentlichen hyperboloid ist.
  7. Multifunktionaler Fliessbohrer nach einem der vorangehenden Ansprüche, wobei die Länge des selbstbohrenden Friktionssegments (5) identisch mit der Länge des Kalibrierungssegments (4) ist.
  8. Multifunktionaler Fliessbohrer nach einem der vorangehenden Ansprüche, wobei die Länge des gewindeöffnenden Segments (3) identisch mit der Länge des Kalibrierungssegments (4) ist.
  9. Multifunktionaler Fliessbohrer nach einem der vorangehenden Ansprüche, anschließend und aufeinanderfolgend umfassend: das gewindeöffnende Segment (3), das Kalibrierungssegment (4) und das selbstbohrende Friktionssegment (5).
  10. Multifunktionaler Fliessbohrer nach dem vorangehenden Anspruch, anschließend und aufeinanderfolgend umfassend: das Anschlag-Abstandshalter-Segment (2), das gewindeöffnende Segment (3), das Kalibrierungssegment (4) und das selbstbohrende Friktionssegment (5).
EP18789472.0A 2017-09-07 2018-09-07 Multifunktionaler fliessbohrer Active EP3680040B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PT11028017 2017-09-07
PCT/IB2018/056842 WO2019049078A1 (pt) 2017-09-07 2018-09-07 Ferramenta multi-operação de furação por atrito

Publications (2)

Publication Number Publication Date
EP3680040A1 EP3680040A1 (de) 2020-07-15
EP3680040B1 true EP3680040B1 (de) 2022-04-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18789472.0A Active EP3680040B1 (de) 2017-09-07 2018-09-07 Multifunktionaler fliessbohrer

Country Status (3)

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EP (1) EP3680040B1 (de)
PT (1) PT2019049078B (de)
WO (1) WO2019049078A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102025105959A1 (de) * 2025-02-18 2026-08-20 Arcus Elektrotechnik Alois Schiffmann Gmbh Schraubverbinder für elektrische leiter sowie verfahren zum herstellen eines solchen schraubverbinders

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11465221B2 (en) 2020-12-28 2022-10-11 GM Global Technology Operations LLC Hybrid threading tool with cutting portion and rolling portion
US11577331B2 (en) * 2020-12-28 2023-02-14 Gm Global Technology Operatins Llc Methods of manufacturing part with hole having cut threads
US11597023B2 (en) 2021-02-22 2023-03-07 Gm Global Technology Operatins Llc Hybrid threading tap with reamer portion and thread cutting portion

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3909725C1 (en) * 1989-03-23 1990-09-06 Jaeger Eberhard Gmbh Hole- and thread-forming screw

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429171A (en) * 1965-10-21 1969-02-25 Joseph J Feher Radius spin drill
DE102004013640A1 (de) * 2004-03-19 2005-10-06 Gühring, Jörg, Dr. Werkzeug und Vorrichtung zur Herstellung von Gewindelöchern
DE102012216302B4 (de) * 2012-09-13 2014-08-28 Federal-Mogul Sealing Systems Gmbh Verfahren zum Herstellen einer definierten Materialverdickung in einer flachen metallischen Lage für einen Stopper einer Flachdichtung, sowie danach hergestellte Flachdichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3909725C1 (en) * 1989-03-23 1990-09-06 Jaeger Eberhard Gmbh Hole- and thread-forming screw

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102025105959A1 (de) * 2025-02-18 2026-08-20 Arcus Elektrotechnik Alois Schiffmann Gmbh Schraubverbinder für elektrische leiter sowie verfahren zum herstellen eines solchen schraubverbinders

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Publication number Publication date
WO2019049078A1 (pt) 2019-03-14
PT2019049078B (pt) 2023-08-02
EP3680040A1 (de) 2020-07-15

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