EP1136155A2 - Procédé et dispositif d'enlèvement de rivets poinçonnants - Google Patents

Procédé et dispositif d'enlèvement de rivets poinçonnants Download PDF

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Publication number
EP1136155A2
EP1136155A2 EP01302304A EP01302304A EP1136155A2 EP 1136155 A2 EP1136155 A2 EP 1136155A2 EP 01302304 A EP01302304 A EP 01302304A EP 01302304 A EP01302304 A EP 01302304A EP 1136155 A2 EP1136155 A2 EP 1136155A2
Authority
EP
European Patent Office
Prior art keywords
punch rivet
threaded mandrel
workpiece
punch
punched
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.)
Withdrawn
Application number
EP01302304A
Other languages
German (de)
English (en)
Other versions
EP1136155A3 (fr
Inventor
Reinhold Opper
Dieter Mauer
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.)
Newfrey LLC
Original Assignee
Newfrey LLC
Emhart LLC
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 Newfrey LLC, Emhart LLC filed Critical Newfrey LLC
Publication of EP1136155A2 publication Critical patent/EP1136155A2/fr
Publication of EP1136155A3 publication Critical patent/EP1136155A3/fr
Withdrawn legal-status Critical Current

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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
    • B21J15/00—Riveting
    • B21J15/38—Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting
    • B21J15/50—Removing or cutting devices for 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
    • B21J15/02—Riveting procedures
    • B21J15/025—Setting self-piercing rivets

Definitions

  • the invention relates to a process for removing punch rivets set in a workpiece, which are tubular and axisymmetric in design.
  • the invention also relates to devices for carrying out this process.
  • German Patent Application 197 26 104 to withdraw a punch rivet with a flat plate-like head or a punch rivet designed axisymmetrically from a workpiece after welding on of a pin.
  • a pin is guided in the immediate vicinity of the upper edge or surface of the set punch rivet to subsequently produce a permanent connection between pin and punch rivet through arc welding or resistance welding in the contact region of pin and upper side or upper edge of the punch rivet.
  • the pin is then withdrawn with the aid of an abutment arranged radially around the pin, the punch rivet being withdrawn from the workpiece.
  • the pin and the withdrawn punch rivet are waste products which can also be recycled.
  • a further disadvantage of the known process is that the welding onto the punch rivet thermally changes the surrounding workpiece material which therefore no longer has the same mechanical properties as before.
  • This known process is also disadvantageous in that the relatively large and heavy tool for withdrawing the punch rivet has to be placed exactly on the punch rivet head or punch rivet wheel in order to be able to ensure a reliable weld joint with the punch rivet. If the pin does not however sit exactly on the rivet head or the rivet edge the workpiece material can also be thermally stressed during the production of the arc.
  • the object of the invention is to facilitate the removal of punch rivets set in a workpiece.
  • this is achieved in that upon setting of the punch rivet, a punched-out piece remaining therein is removed by a tool and thereafter a threaded mandrel is screwed into the punch rivet with simultaneous formation of a substantially continuous distinctive thread, which threaded mandrel upon its subsequent withdrawal counter to the pressure of an abutment resting on the workpiece withdraws the punch rivet from the workpiece.
  • a very secure connection between the threaded mandrel and the punch rivet is ensured through the use of the threaded mandrel. Furthermore the surrounding material of the workpiece is not thermally stressed.
  • a further advantage of the process according to the invention is that the same tool can always be used for withdrawing the punch rivets whereas in the known process a correspondingly large amount of waste is produced by the welding-on of pins which are later thrown away.
  • the punched-out piece remaining therein is removed by a tool which is preferably a ram which is applied in the centre of the punch rivet and expels the punched-out piece from its connection to the workpiece.
  • a tool which is preferably a ram which is applied in the centre of the punch rivet and expels the punched-out piece from its connection to the workpiece.
  • the abutment which is advantageously designed as a hollow cylinder rests on a surface extending concentrically around the punch rivet, which surface is preferably dimensioned such that the pressure forces do not lead to a deformation of the workpiece.
  • the abutment can however also be formed from cylinder halves and therefore optionally adapt itself to narrow constructional conditions, as prevail for example in window recesses in the manufacture of cars.
  • the threaded mandrel After removal of the punch rivet the threaded mandrel is either removed manually from the screwed-on punch rivet or clamped in a tong-like tool in order to avoid injuries, and the threaded mandrel is unscrewed from the punch rivet with rotation in the opposite direction. The threaded mandrel can then immediately be screwed into the next punch rivet.
  • a device for carrying out the process according to the invention is expediently composed of a drive device provided with a clamping chuck for clamping of the threaded mandrel, which drive device rotates the clamping chuck with forward movement and is switched to backward movement, abutments, which are preferably constructed cylindrically, surrounding and being associated with the drive device.
  • a sensor is coupled to the drive device, which sensor measures the forward movement of a forward movement spindle and after an adjustable forward movement stops the rotation of the forward movement spindle and switches this to backward movement.
  • the device according to the invention has a threaded mandrel which is optionally provided at its tip with a ram for expelling the punched-out piece or a drill bit which can expel or drill out the punched-out piece from the punch rivet.
  • a ram for expelling the punched-out piece
  • a drill bit which can expel or drill out the punched-out piece from the punch rivet.
  • the movement steps of the device according to the invention required for the process according to the invention can take place using a drill bit on the tip of the threaded mandrel through the forward movement spindle which changes its speed accordingly in accordance with the machining requirements.
  • the forward movement spindle can be provided with a hydraulic device, the steps of which are matched to one another by means of a known processor.
  • Fig. 1a shows a punch rivet 7 in accordance with the above mentioned DE-OS 197 26 104 which is constructed axisymmetrically.
  • Fig. 1b the same punch rivet is shown in perspective view.
  • the punch rivet 7 has the male side 8 on one side and the female side 9 on its opposing side. Both the male side 8 and the female side 9 are provided with a surrounding cutting edge 10 and 11 in each case.
  • Fig. 1b shows the same punch rivet 7 in perspective view.
  • Fig. 2a the riveting of two sheets 12 and 13 which form the workpiece is illustrated by means of the punch rivet 23, which is based on the punch rivet 7 in accordance with Fig. la and 1b.
  • the punch rivet 23 is widened radially outwards on its male side with its cutting edge 10 and on its female side with its cutting edge 11 whereby the riveted joint is formed. This is a known design of a riveted joint.
  • Fig. 2b shows the riveted joint in accordance with Fig. 2a towards which the ram 18 moves.
  • the ram 18 is preferably designed at its end face in the form of a truncated cone so penetration into the punched-out piece is facilitated.
  • the ram can also be designed flat or concave at its end face.
  • Fig. 2c it is shown how the ram 18 moves through the riveted joint and in so doing pushes out the punched-out piece 21 from the centre of the punch rivet. It is also possible to drill out the punched-out piece with a drill bit (see Fig. 5).
  • Fig. 2d the beginning of the removal of the punch rivet 23 from the riveted joint is illustrated.
  • the forward movement spindle 30 with the threaded mandrel 20 arranged thereon is inserted in the punch rivet in a centred manner and is screwed by rotation into the inner surface of the punch rivet 23.
  • the thread of the threaded mandrel 20 cuts into the inner surface of the punch rivet during the rotation process and forms an interlocking and non-positive fit with it.
  • Fig. 2e shows the punch rivet 23 located on the threaded mandrel 20 and the two sheets 12 and 13 now separated.
  • Fig. 3 shows an enlarged view of the threaded mandrel 20 in its interlocking and non-positive fit with the punch rivet 23.
  • Fig. 4 shows another embodiment of the present invention in which the threaded mandrel 20 is provided with a ram 200 with which the punched-out piece is expelled from the punch rivet.
  • Fig. 5 shows a further embodiment of the threaded mandrel 20 according to the invention which has a drill bit 300 in order to drill out the punched-out piece from the punch rivet.
  • Fig. 6 shows a device according to the invention for withdrawing a punch rivet.
  • the device 60 according to the invention has a measuring device 50 which is arranged in such a way that rotational and pulling movements of the clamping jaws 25 or of the forward movement spindle 30 can be measured in order to convey information about the movement performed by the threaded mandrel 20 in each case.
  • a control circuit is produced between the measuring device 50 and the drive of the device 60 according to the invention which is not illustrated, which control circuit optionally supplies processing data from the device 60 according to the invention via additional sensors and therefore can ensure reliable and precise removal of punch rivets.
  • Fig. 7 shows the device according to the invention in accordance with Fig. 6, the ram 200 being arranged on the tip of the threaded mandrel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Automatic Assembly (AREA)
EP01302304A 2000-03-16 2001-03-13 Procédé et dispositif d'enlèvement de rivets poinçonnants Withdrawn EP1136155A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10012845 2000-03-16
DE2000112845 DE10012845A1 (de) 2000-03-16 2000-03-16 Verfahren und Vorrichtung zum Entfernen von Stanznieten aus einem Werkstück

Publications (2)

Publication Number Publication Date
EP1136155A2 true EP1136155A2 (fr) 2001-09-26
EP1136155A3 EP1136155A3 (fr) 2002-02-06

Family

ID=7634968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01302304A Withdrawn EP1136155A3 (fr) 2000-03-16 2001-03-13 Procédé et dispositif d'enlèvement de rivets poinçonnants

Country Status (3)

Country Link
EP (1) EP1136155A3 (fr)
JP (1) JP2001293536A (fr)
DE (1) DE10012845A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1645358A3 (fr) * 2004-10-07 2006-12-06 Textron, Inc. Outil de réparation améliorant la performance
WO2015017942A1 (fr) * 2013-08-08 2015-02-12 Bossard Ag Procédé d'assemblage de plusieurs segments de matériau en forme de plaque au moyen d'un rivet creux
WO2016036253A1 (fr) * 2014-09-02 2016-03-10 Aker Subsea As Outil d'extraction à interface de couple
CN106181856A (zh) * 2016-07-11 2016-12-07 徐州徐工基础工程机械有限公司 一种销轴拆卸方法
CN116648316A (zh) * 2020-12-22 2023-08-25 罗伯特·博世有限公司 铆接工具机或铆接附件装置的复位装置、带复位装置的铆接工具机和带复位装置的铆接附件装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2291757C2 (ru) * 2002-07-17 2007-01-20 Дженерал Электрик Компани Способ удаления соединительных штырей
JP4533703B2 (ja) * 2004-08-26 2010-09-01 株式会社リコー ブラインドリベット取外し方法
US7555820B2 (en) * 2005-01-24 2009-07-07 The Boeing Company Methods for removing blind fasteners
GB2426802B (en) * 2005-05-31 2008-07-16 Newfrey Llc A blind rivet, removal system and removal method
JP5436617B2 (ja) * 2012-06-04 2014-03-05 日本車輌製造株式会社 リベット取外し方法
JP2019010694A (ja) * 2017-06-29 2019-01-24 豊田鉄工株式会社 ブラインドナット取り外し工具及びブラインドナット取り外し構造

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4320068C1 (de) * 1993-06-17 1994-12-15 Audi Ag Verfahren und Vorrichtung zur Reparatur von Fahrzeugkarosserien aus Leichtmetallteilen
DE19726104A1 (de) * 1997-06-19 1998-12-24 Emhart Inc Verfahren zum Entfernen von in ein Werkzeug gesetzten Stanznieten
DE20010941U1 (de) * 2000-06-20 2000-09-28 Thiele, Hartmut, 30890 Barsinghausen Gerät zum Lösen von Hohlnieten

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1645358A3 (fr) * 2004-10-07 2006-12-06 Textron, Inc. Outil de réparation améliorant la performance
WO2015017942A1 (fr) * 2013-08-08 2015-02-12 Bossard Ag Procédé d'assemblage de plusieurs segments de matériau en forme de plaque au moyen d'un rivet creux
WO2016036253A1 (fr) * 2014-09-02 2016-03-10 Aker Subsea As Outil d'extraction à interface de couple
CN106181856A (zh) * 2016-07-11 2016-12-07 徐州徐工基础工程机械有限公司 一种销轴拆卸方法
CN106181856B (zh) * 2016-07-11 2017-12-12 徐州徐工基础工程机械有限公司 一种销轴拆卸方法
CN116648316A (zh) * 2020-12-22 2023-08-25 罗伯特·博世有限公司 铆接工具机或铆接附件装置的复位装置、带复位装置的铆接工具机和带复位装置的铆接附件装置

Also Published As

Publication number Publication date
JP2001293536A (ja) 2001-10-23
DE10012845A1 (de) 2001-09-20
EP1136155A3 (fr) 2002-02-06

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