DE4401134A1 - Method for monitoring effectiveness of blind riveting operation - Google Patents

Method for monitoring effectiveness of blind riveting operation

Info

Publication number
DE4401134A1
DE4401134A1 DE19944401134 DE4401134A DE4401134A1 DE 4401134 A1 DE4401134 A1 DE 4401134A1 DE 19944401134 DE19944401134 DE 19944401134 DE 4401134 A DE4401134 A DE 4401134A DE 4401134 A1 DE4401134 A1 DE 4401134A1
Authority
DE
Germany
Prior art keywords
force
rivet
setting process
measurement
setting
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
DE19944401134
Other languages
German (de)
Other versions
DE4401134C2 (en
Inventor
Klaus Dr Ing Dehlke
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.)
INFERT GmbH
Original Assignee
INFERT GmbH
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Filing date
Publication date
Application filed by INFERT GmbH filed Critical INFERT GmbH
Priority to DE19944401134 priority Critical patent/DE4401134C2/en
Publication of DE4401134A1 publication Critical patent/DE4401134A1/en
Application granted granted Critical
Publication of DE4401134C2 publication Critical patent/DE4401134C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • B21J15/10—Riveting machines
    • B21J15/28—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups
    • B21J15/285—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups for controlling the rivet upset cycle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means
    • G01L5/0033—Force sensors associated with force applying means applying a pulling force

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Insertion Pins And Rivets (AREA)

Abstract

The method involves using a pneumatic/hydraulic hand tool and a pressure sensor. The sensor determines the thrust experienced by the rivet head in opposition to the force exerted on the rivet by its traction stem during the deformation phase following rivet insertion. The force/time relationship during this phase is compared with stored norms for the process. A further sensor measures the linear travel of the rivet stem until its separation by shearing. The latter sensor also provides an additional control parameter for confirming satisfactory performance.

Description

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur Überwachung von Setzprozessen von Blindbefe­ stigern gemäß dem Oberbegriff im Patentanspruch 1.The present invention relates to a method and a Device for monitoring the setting processes of blind commands Tiger according to the preamble in claim 1.

Blindnieten gehört zu den mechanischen Verbindungstechniken. Der Fügepartnerzusammenhalt wird durch Umformung des Hilfs­ fügeteils Blindniet bzw. Blindbefestiger erreicht. Das Setzen von Blindbefestigern ist ein Prozeß, der weitgehend unabhängig vom Verarbeitenden abläuft. Setzgerät und Blind­ befestiger sind aufeinander abgestimmt und bilden ein Sy­ stem.Blind rivets are one of the mechanical joining techniques. Joining partner cohesion is achieved by reshaping the auxiliary partially reached blind rivet or blind fastener. The Placing blind fasteners is a process that is largely runs independently of the processor. Setting tool and blind fasteners are coordinated and form a sy stem.

Von Nachteil ist, daß der Verarbeitende den Prozeß nicht kontrollieren kann. Blindbefestiger werden vor allem dort eingesetzt, wo die Verbindungsstelle nur einseitig zugäng­ lich ist. Damit ist die für die Verbinderfunktion notwendige Schließkopfbildung in der Regel keiner Kontrolle zugänglich. Mögliche Fehler können so nicht bzw. nicht rechtzeitig erkannt werden.The disadvantage is that the processor does not process can control. Blind fasteners are mainly there used where the connection point is only accessible from one side is. This is necessary for the connector function Closing head formation generally not accessible to any control. This means that possible errors cannot be made, or not in time be recognized.

Nach EP 0454 890 A1 ist ein Nietsetzgerät vorgeschlagen worden, bei dem eine Kraftmeßeinrichtung im Zugmechanismus des Gerätes angebracht ist, die sicherstellt, daß das Niet­ setzgerät mit einer vorgegebenen Zugkraft arbeitet und somit den Setzvorgang von Blindnieten oder Blind-Einnietmuttern überwacht und fehlerhafte Setzvorgänge anzeigt, den Ver­ schleiß des Spannmechanismus feststellt und eine notwendige Wartung anzeigt. Der Nachteil dieser Lösung besteht darin, daß der Setzprozeß der Blindbefestiger nicht in die Überwa­ chung mit einbezogen wird. According to EP 0454 890 A1, a rivet setting device is proposed been in which a force measuring device in the pull mechanism of the device is attached, which ensures that the rivet setting tool works with a given tensile force and thus the setting process of blind rivets or blind rivet nuts monitors and displays incorrect setting processes, ver wear of the tensioning mechanism and a necessary Indicates maintenance. The disadvantage of this solution is that the setting process of the blind fasteners is not excessive is involved.  

Der Setzprozeß und damit auch die Ausbildung der Verbindung werden von einer Vielzahl von Faktoren beeinflußt. Während der Umformung werden auch die Eigenschaften der Verbindung ausgeprägt. Diesen Umformprozeß gilt es zu überwachen.The setting process and thus the formation of the connection are affected by a variety of factors. While the forming also becomes the properties of the connection pronounced. It is important to monitor this forming process.

Der vorliegenden Erfindung liegt dementsprechend die Aufgabe zugrunde ein Verfahren und eine Vorrichtung zu entwickeln, das die Überwachung von Setzprozessen von Blindnieten zuläßt und bei der die Kraftmeßeinrichtung am oder im Setzgerät angebracht ist.The object of the present invention is accordingly to develop a method and a device that allows the monitoring of setting processes of blind rivets and in which the force measuring device on or in the setting tool is appropriate.

Erfindungsgemäß wird dazu die Prozeßgröße Kraft genutzt. Gemessen wird jedoch nicht die aufgebrachte Zugkraft, son­ dern die durch den Blindniet geflossene, umgelenkte, und der Zugkraftrichtung entgegengesetzte Kraftkomponente. In Größe und Verlauf dieser Kraftkomponente widerspiegeln sich im wesentlichen der Ablauf des Umformprozesses. Damit kann über die Überwachung der Setzgerätefunktion in Erfindung EP 0 454 890 A1 hinausgehend auch der Setzprozeß in die Überwachung mit eingebunden werden. Die ermittelten Meßkurven sind dazu mit Sollkurven zu vergleichen. Ziel ist es zu ermitteln, ob der Umformprozeß in der gewünschten Weise abläuft bzw. abgelaufen ist. Die Sollkurven können in Datenbanken abge­ legt sein bzw. jederzeit Istkurven als Sollkurven vorgegeben werden.According to the invention, the process variable force is used for this. However, the tensile force applied is not measured because the riveted, redirected, and the Direction of opposite force component. In size and the course of this force component are reflected in the essentially the sequence of the forming process. So that can the monitoring of the setting tool function in invention EP 0 454 890 A1 going beyond this, the setting process in monitoring be involved. The determined measurement curves are included to compare with target curves. The goal is to determine whether the forming process proceeds in the desired manner or has expired. The target curves can be stored in databases sets its or actual curves at any time as target curves become.

Im Gegensatz zu Patent EP 0 454 890 A1 ist bei der erfin­ dungsgemäßen Lösung die Kraftmeßeinrichtung außerhalb des Zugmechanismus angebracht.In contrast to patent EP 0 454 890 A1, the inventor Invention solution the force measuring device outside of Pull mechanism attached.

Ein weiterer Informationsgewinn kann durch eine zeitgleiche Messung des Setzweges bis zum Dorn- oder Nietnagelabriß bzw. Dorndurchzug erreicht werden. Dazu ist eine Wegmessungsein­ richtung am Setzgerät anzubringen bzw. eine externe Wegmes­ sung vorzunehmen.A further information gain can be achieved by a simultaneous Measurement of the setting path until the mandrel or rivet tears or Mandrel passage can be achieved. For this there is a distance measurement direction on the setting tool or an external measuring tool solution.

Die Erfindung wird am nachfolgenden Ausführungsbeispiel erläutert. Es zeigen:The invention is based on the following embodiment explained. Show it:

Fig. 1 das Meßprinzip und Fig. 1 shows the principle of measurement and

Fig. 2 die Sensoranordnung an einem an sich bekannten pneumatisch-hydraulischen Blindnietsetzgerät. Fig. 2 shows the sensor arrangement on a known pneumatic-hydraulic blind rivet setting device.

Fig. 1 stellt das Meßprinzip der Erfindung dar, nach dem die durch den Blindniet geflossene, umgelenkte und der Zugkraft­ richtung entgegengesetzte Kraftkomponente gemessen wird. Diese Kraftkomponente ist die für den Umformprozeß erforder­ liche Gegenhaltekraft. Der am Blindnietsetzgerät angebrachte Wegsensor mißt den Weg des Zugmechanismus. Fig. 1 shows the measuring principle of the invention, according to which the force flowed through the blind rivet, deflected and the tensile force direction opposite force component is measured. This force component is the counter force required for the forming process. The displacement sensor attached to the blind rivet setting device measures the displacement of the pulling mechanism.

Nach Fig. 2 wird eine Kraftmeßeinrichtung am Setzgerät derart angebracht, daß die für eine am Nietdorn bzw. -nagel anliegende Zugkraft am Setzkopf notwendigerweise auftretende Gegenkraft gemessen werden kann.According to FIG. 2, a force measuring device is attached to the setting tool in such a way that the counterforce that necessarily occurs at the setting head for a tensile force applied to the rivet mandrel or nail can be measured.

Claims (5)

1. Verfahren zur Überwachung der Verarbeitung von Blindbefe­ stigern, dadurch gekennzeichnet, daß
  • a) die durch den Blindniet geflossene, umgelenkte, und der Zugkraftrichtung entgegengesetzte Kraftkomponente gemessen wird,
  • b) Kraftverlauf und -größe über den Setzvorgang erfaßt werden und
  • c) die Meßsignalauswertung als Soll-Ist-Vergleich im Echtzeitbetrieb im Zeitraum zwischen Setzprozeßende und Beginn des nachfolgenden Setzprozesses erfolgt oder eine nicht setzprozeßparallele Meßsignalauswer­ tung mit eindeutiger Zuordnungsmöglichkeit des Ergeb­ nisses zum entsprechenden Niet vorgenommen wird.
1. A method for monitoring the processing of Blindbefe stigern, characterized in that
  • a) the force component flowed through the blind rivet, deflected and opposite to the direction of the tensile force is measured,
  • b) force course and magnitude are detected via the setting process and
  • c) the measurement signal evaluation is carried out as a target-actual comparison in real time in the period between the end of the setting process and the beginning of the subsequent setting process or a measurement signal evaluation that is not parallel to the setting process is carried out with a clear possibility of assigning the result to the corresponding rivet.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Kraftmessung direkt oder indirekt am Setzgerät er­ folgt.2. The method according to claim 1, characterized in that the force measurement directly or indirectly on the setting tool follows. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine direkte oder indirekte Messung des Hubes des Setzge­ rätes parallel und zeitgleich zur Kraftmessung erfolgt.3. The method according to claim 1 or 2, characterized in that a direct or indirect measurement of the stroke of the riser advised in parallel and simultaneously with the force measurement. 4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Meßsignalauswertung an einer nicht näher dargestell­ ten Verarbeitungseinheit und/oder unabhängig von ihr erfolgt.4. The method according to claim 1 to 3, characterized in that the measurement signal evaluation on a not shown th processing unit and / or independently of it he follows. 5. Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß der Kraftsensor und der Wegsensor am oder im Setzgerät angebracht sind.5. Device for performing the method according to Claims 1 to 4, characterized in that the force sensor and the displacement sensor on or in the setting tool are attached.
DE19944401134 1994-01-17 1994-01-17 Procedures for monitoring the processing of blind fasteners Expired - Fee Related DE4401134C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19944401134 DE4401134C2 (en) 1994-01-17 1994-01-17 Procedures for monitoring the processing of blind fasteners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944401134 DE4401134C2 (en) 1994-01-17 1994-01-17 Procedures for monitoring the processing of blind fasteners

Publications (2)

Publication Number Publication Date
DE4401134A1 true DE4401134A1 (en) 1995-07-27
DE4401134C2 DE4401134C2 (en) 1997-08-28

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19614734A1 (en) * 1996-04-15 1996-10-17 Klaasens Ursula Pressure measuring device for hot tool butt welding machines
EP0738551A2 (en) * 1995-04-20 1996-10-23 Emhart Inc. Blind rivet system verification system and method
EP0738550A2 (en) * 1995-04-20 1996-10-23 Emhart Inc. Blind rivet setting system and method for setting a blind rivet then verifying the correctness of the set
EP0772033A3 (en) * 1995-11-06 1998-11-04 Ford Motor Company Limited Method of monitoring and controlling shear strength in riveted joints
EP1302258A1 (en) * 2001-10-11 2003-04-16 Techspace Aero S.A. Real-time monitoring of the quality of a rivet joint
WO2003059551A1 (en) * 2002-01-21 2003-07-24 MS Gerätebau GmbH Placing tool with means for controlling placing processes
WO2003059550A1 (en) * 2002-01-21 2003-07-24 Ms Verwaltungs- Und Patentgesellschaft Mbh Setting tool comprising a device for measuring tensile stress
EP1382405A2 (en) * 2002-07-18 2004-01-21 Newfrey LLC Improved blind fastener setting tool
WO2005025772A1 (en) * 2003-09-12 2005-03-24 Avdel Verbindungselemente Gmbh Rivet processing apparatus
DE102006002237A1 (en) * 2006-01-17 2007-07-19 Böllhoff Verbindungstechnik GmbH Monitoring process for set bolt joint making involves using reaction force and/or end position of bolt to evaluate and/or influence process
US7343764B2 (en) 2002-01-21 2008-03-18 Ms Geraetebau Gmbh Placing tool with means for controlling placing processes
EP1992429A1 (en) 2002-01-21 2008-11-19 MS Gerätebau GmbH Setting tool with means for monitoring setting procedures
DE112004000952B4 (en) * 2003-06-05 2013-01-17 Richard Bergner Verbindungstechnik Gmbh & Co. Kg Pre-assembled assembly unit of a blind rivet and method for riveting two components with a blind rivet

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19846463C2 (en) * 1998-10-08 2002-10-31 Masch Und Werkzeugbau Dorothe Method for controlling a riveting device and such a device
DE20210840U1 (en) * 2002-01-21 2003-05-28 Ms Verwaltungs Und Patentgmbh Setting tool, especially a riveting tool has a piezoelectric sensor for measuring the tensile force applied to the rivet shaft so that the force can be accurately measured without a power supply to the sensor
DE102010015325B4 (en) 2010-04-17 2012-11-15 Bayerische Motoren Werke Aktiengesellschaft Testing device for a riveting tool
DE102012012013A1 (en) 2012-06-16 2012-12-13 Daimler Ag Method for determination of strength of RIVTAC connection between metal sheets, involves exerting test forces on end region of joining element and region of component, and increasing forces until joining element is fed from component
DE102012022622B4 (en) 2012-11-20 2014-10-30 Audi Ag Device for carrying out setting experiments with blind rivets
DE102014206373B4 (en) * 2014-04-03 2022-09-08 Bayerische Motoren Werke Aktiengesellschaft Procedure for determining the clamping force of a riveted joint

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454890A1 (en) * 1990-05-04 1991-11-06 VVG Befestigungstechnik Beteiligungs-GmbH Control device for blind rivet setting tools

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454890A1 (en) * 1990-05-04 1991-11-06 VVG Befestigungstechnik Beteiligungs-GmbH Control device for blind rivet setting tools

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0738551A2 (en) * 1995-04-20 1996-10-23 Emhart Inc. Blind rivet system verification system and method
EP0738550A2 (en) * 1995-04-20 1996-10-23 Emhart Inc. Blind rivet setting system and method for setting a blind rivet then verifying the correctness of the set
EP0738551A3 (en) * 1995-04-20 1996-11-13 Emhart Inc. Blind rivet system verification system and method
EP0738550A3 (en) * 1995-04-20 1997-01-29 Emhart Inc Blind rivet setting system and method for setting a blind rivet then verifying the correctness of the set
US5661887A (en) * 1995-04-20 1997-09-02 Emhart Inc. Blind rivet set verification system and method
US5666710A (en) * 1995-04-20 1997-09-16 Emhart Inc. Blind rivet setting system and method for setting a blind rivet then verifying the correctness of the set
EP0772033A3 (en) * 1995-11-06 1998-11-04 Ford Motor Company Limited Method of monitoring and controlling shear strength in riveted joints
DE19614734A1 (en) * 1996-04-15 1996-10-17 Klaasens Ursula Pressure measuring device for hot tool butt welding machines
EP1302258A1 (en) * 2001-10-11 2003-04-16 Techspace Aero S.A. Real-time monitoring of the quality of a rivet joint
WO2003059550A1 (en) * 2002-01-21 2003-07-24 Ms Verwaltungs- Und Patentgesellschaft Mbh Setting tool comprising a device for measuring tensile stress
WO2003059551A1 (en) * 2002-01-21 2003-07-24 MS Gerätebau GmbH Placing tool with means for controlling placing processes
US7343764B2 (en) 2002-01-21 2008-03-18 Ms Geraetebau Gmbh Placing tool with means for controlling placing processes
EP1992429A1 (en) 2002-01-21 2008-11-19 MS Gerätebau GmbH Setting tool with means for monitoring setting procedures
CZ305122B6 (en) * 2002-01-21 2015-05-13 MS Gerätebau GmbH Insertion tool and method of checking insertion processes for such a tool
EP1382405A2 (en) * 2002-07-18 2004-01-21 Newfrey LLC Improved blind fastener setting tool
EP1382405A3 (en) * 2002-07-18 2004-06-30 Newfrey LLC Improved blind fastener setting tool
US7055393B2 (en) 2002-07-18 2006-06-06 Newfrey Llc Blind fastener setting tool
DE112004000952B4 (en) * 2003-06-05 2013-01-17 Richard Bergner Verbindungstechnik Gmbh & Co. Kg Pre-assembled assembly unit of a blind rivet and method for riveting two components with a blind rivet
WO2005025772A1 (en) * 2003-09-12 2005-03-24 Avdel Verbindungselemente Gmbh Rivet processing apparatus
DE102006002237A1 (en) * 2006-01-17 2007-07-19 Böllhoff Verbindungstechnik GmbH Monitoring process for set bolt joint making involves using reaction force and/or end position of bolt to evaluate and/or influence process
DE102006002237B4 (en) * 2006-01-17 2012-09-20 Böllhoff Verbindungstechnik GmbH Method and device for monitoring a joining process for connecting at least two components by means of a setting bolt

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