EP1064111A1 - Procede permettant de commander, de surveiller et de controler une operation de formage d'une machine de formage, notamment d'une riveteuse - Google Patents

Procede permettant de commander, de surveiller et de controler une operation de formage d'une machine de formage, notamment d'une riveteuse

Info

Publication number
EP1064111A1
EP1064111A1 EP99907589A EP99907589A EP1064111A1 EP 1064111 A1 EP1064111 A1 EP 1064111A1 EP 99907589 A EP99907589 A EP 99907589A EP 99907589 A EP99907589 A EP 99907589A EP 1064111 A1 EP1064111 A1 EP 1064111A1
Authority
EP
European Patent Office
Prior art keywords
forming
piston
pressure
workpiece
change
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
EP99907589A
Other languages
German (de)
English (en)
Other versions
EP1064111B1 (fr
Inventor
Thomas Zemp
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.)
BALTEC MASCHINENBAU AG
Original Assignee
BALTEC MASCHINENBAU AG
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 BALTEC MASCHINENBAU AG filed Critical BALTEC MASCHINENBAU AG
Publication of EP1064111A1 publication Critical patent/EP1064111A1/fr
Application granted granted Critical
Publication of EP1064111B1 publication Critical patent/EP1064111B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B21J15/12—Riveting machines with tools or tool parts having a movement additional to the feed movement, e.g. spin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups

Definitions

  • the present invention relates to a method for controlling, monitoring and checking a forming process of a forming machine, in particular a riveting machine, on a workpiece by means of a piston which is moved against the workpiece, an upper piston surface and / or a lower piston surface for moving the piston with pressure is applied and a forming machine operated according to the above Method.
  • Forming machines in particular riveting machines, are known and used in a wide variety of forms and designs in the prior art. They are primarily used to machine mechanical material deformations, especially riveting. Such should. Machines can be integrated into automation processes. Essentially, this involves the production of riveted joints using a riveting machine cold forming, since two parts can be joined together during material deformation.
  • a device for checking material deformations is known from EP 0 699 490 AI, a deviation possibly being determined via two different displacement sensor arrangements and via push buttons.
  • the disadvantage here is that such a device is complex and complex to manufacture and no exact determination of a rivet start is possible.
  • DE 37 15 905 C2 discloses a method for mechanically producing riveted connections and a riveting machine for carrying out the method, in which a striker is shifted against a workpiece from a predetermined zero position. This movement onto a workpiece takes place with a measuring force that is smaller than the force required for the deformation of the rivet. The feed distance of the striker caused by the measuring force is measured and is compared as an actual value with a target value. The disadvantage of this is that the rivet cannot be driven with full feed force. Monitoring the complete riveting process is not possible here.
  • the present invention has for its object a method for controlling, monitoring and checking a
  • Such a pressure change which is measured in a pressure line and / or vent line for moving the piston, or in an upper or a lower piston chamber itself via at least one sensor element, determines an exact start of forming when the piston strikes a workpiece If a piston or rivet head moves on a workpiece, there is a pressure change that is detected and determined directly in the sensor element, in particular the pressure sensor.
  • a change in pressure can also be used to exactly determine and control the change in the force with which the forming takes place
  • a change in force can also provide information about the start of forming
  • the sensor element should preferably be provided in the machine housing near the upper and / or lower piston chamber. This is connected to a control device which evaluates the data
  • the piston can be moved permanently with full feed and, if necessary, constant feed force when shaping onto the workpiece. Only the pressure change is displayed immediately when the riveting tool strikes the workpiece and can be measured using a position measuring device - 4 -
  • a predetermined path in particular the forming path, is continued until the predetermined path is reached within a certain time.
  • the piston can also be moved against the workpiece for a certain time with a predetermined feed or forming force until after a certain forming or comparison time the Forming is carried out as desired
  • predefined comparison parameters which can be determined, for example, by experiment, it can be determined exactly whether the forming has been carried out as desired.It can be determined exactly, for example whether the rivet was sufficient, whether a rivet was present at all, or whether the forming time or the forming path was exact This was possible by determining the exact start of forming
  • a method and a forming machine are created, with which a rivet start or forming start can be determined very precisely.
  • the time for a specific forming path can be used as a comparison criterion to provide information about a to receive faulty or non-faulty forming
  • time is also possible for the time to be predetermined and for the forming path covered during this time to be used as a comparison criterion for determining a forming state. This ensures that an automated forming process can also be continuously monitored and controlled
  • a predetermined forming path is followed, with a time comparison and / or an additional comparison of the forming force (effective Force action in Newtons N) on the rivet or workpiece, the unit of time or the force at the moment in which the predetermined molding path is reached, a forming process is monitored and a forming result is determined.
  • a forming force effective Force action in Newtons N
  • time and force can be recorded continuously during the complete forming process.
  • the sampling rate can be bpsw. done in 100 Hz and gives the size of the work performed per unit of time.
  • a very precise error detection or a determination of the cause of the error is preferably always carried out using two comparison variables with a predetermined parameter, in order to rule out that two errors together with the opposite value compensate one another and thus prevent an error from being detected.
  • the ascertainable forming work per unit of time also allows an exact assessment of the riveting process and, in particular, an exact conclusion about the strength properties of the formed workpiece.
  • FIG. 1 shows a schematically illustrated partial longitudinal section through a riveting machine according to the invention
  • FIG. 2 shows a schematically illustrated partial longitudinal section through a further exemplary embodiment of the riveting machine according to FIG. 1.
  • Figure 1 is a forming machine, in particular
  • Riveting machine R shown which essentially has components of a conventional riveting machine, as shown in EP 0 699 490 AI. Reference is expressly made to this prior art, since essentially all components of a conventional riveting machine are described in detail there. A further description of the individual components is therefore omitted.
  • a forming machine R has a machine frame 1 which is only indicated by dashed lines and which has a vertical support arm which is only indicated and in which a support surface 2 is preferably connected at right angles.
  • the support surface 2 carries the workpieces 27 to be machined. These are not numbered in detail here.
  • the machine frame 1 and in particular on the vertical support arm, a machine housing 3 is fixed, which is hollow inside.
  • a preferably hollow, displaceable pneumatic piston 4 is arranged in the machine housing 3.
  • the cavity 6 is divided into an upper piston chamber 7 and a lower piston chamber 8 by the projecting flange 5.
  • the projecting flange 5 accordingly has a Upper piston chamber 7 facing upper piston surface 9 and a lower piston surface 10
  • a preferably pneumatic or hydraulic pressure line 11 flows into the upper piston chamber 7.
  • a pneumatic or hydraulic ventilation line 12 connects to the lower piston chamber 8.
  • a control valve 13, 14, in particular a throttle, is inserted into the pressure line 11 and ventilation line 12, which is connected to a control device 16 via connection lines 15 1, 15 2.
  • a further connection line 15 3 establishes the connection between a drive motor 17, in particular an electric motor. This can also be designed as a hydraulic motor.
  • the electric motor drives a sleeve 18 1 in which the position can be changed Projecting end 18 2 of a drive shaft 19 is mounted.
  • the drive shaft 19 is rotatably supported in a cavity 20 of the piston 4 by means of bearings only indicated here.
  • a rivet head 21 is connected to the drive shaft 19 at the bottom.
  • the rivet head 21 also serves as a tool holder Riveting tool a dop per 22 included
  • the preferably stationary machine housing 3, as well as the piston 4, which is movable in the machine housing 3 in the direction of a Z axis 23, has a displacement measuring device 24, which is connected to the control device 16 via a further connecting line 15 4.
  • This control device 16 takes over all controls and Controls that are required to operate the riveting machine R.
  • the data required for this can optionally be entered via a computer 25 and evaluated during or after a work process and output there.
  • a control device 16 can be integrated into an existing one Production can be integrated in order to operate a corresponding R riveting machine fully automatically.
  • a sensor element 26.1 is inserted in the pressure line 11 and a sensor element 26.2m in the ventilation line 12.
  • the sensor elements 26 1, 26 2 are preferably used near the machine housing 3 m, the pressure line 11 or the ventilation line 12.
  • the sensor elements 26.1, 26.2 are also connected to the control device 16 via connecting lines 15.5, 15 6. It is also important here that the sensor elements 26.1, 26.2 are inserted between the control valves 13, 14 and the machine housing 3 in the pressure line 26.1 or vent line 26 2.
  • the sensor elements 26.1, 26.2 which are preferably designed as pressure sensors, but also as pressure transmitters, can very precisely determine a pressure change in the pressure line 11 or vent line 12 when the piston 4 strikes a workpiece 27 to be machined during the movement.
  • a pressure change is caused in the pressure line 11, which is immediately registered via the sensor elements 26.1, 26.2 and accordingly in the vent line 26.2.
  • This pressure change causes a start or a shift in the zero point can be calculated
  • the exact determination of the start of the riveting is necessary in order to be able to exactly determine the forming path required for optimal forming. If the start of the rivet is known, the forming path can be exactly determined by means of a further method using the displacement measuring device 24. This can also be possible using a continuous method and time determination. It is advantageous here that an exact determination of the - 10 -
  • Forming can be detected by the pressure change in the sensor elements 26.1, 26.2
  • a forming machine R lr in particular a riveting machine, in which the sensor elements 26 3, 26 4 are inserted into an upper piston chamber 7 and a lower piston chamber 8.
  • a throttle valve 29, which is adjustable, is preferably inserted into the ventilation line 12. This can be connected to the control device 16.
  • the method of the piston 4 can be steamed in particular into a lower position. A hard impact of the piston after the downward movement is prevented by this throttle valve 29.
  • the flow of the spool can be regulated by means of the throttle valve 29, it also being possible to change the speed of the travel of the spindle or of the piston 4.
  • the sensor elements 26.3, 26 4 are connected to the control device 16 via the connecting lines 15.7, 15 8.
  • the rivet start be exactly determined by the pressure change, but also the forming force calculated from the pressure change.
  • the riveting results can be checked and determined exactly by determining the start of the rivet or the start of the forming process, which is to be equated with a process start, whereby either the riveting time or the path are specified
  • the quality of the forming process is influenced by an additional time comparison. If a specific predetermined path is covered within a certain time, the forming or riveting is - 11 -
  • a certain time is determined in the experiment, for example, a time tolerance measure is established in order to identify a positive or negative riveting result
  • a predetermined time for forming or riveting can be specified, in which case the travel path is used as a comparison parameter in order to assess a riveting result.
  • the travel path can be exactly determined via the distance measuring unit, but is, for example, by experiment or a path tolerance is specified by a specific specification, which serves as a comparison tolerance ass for successful forming
  • Cavity 39 72 upper piston chamber 40 73 lower piston chamber 4 1 74 upper piston surface 42 75 lower piston surface 43 7 6

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Control Of Presses (AREA)

Abstract

L'invention concerne un procédé permettant de commander, de surveiller et de contrôler une opération de formage effectuée sur une pièce (27) par une machine de formage, notamment une riveteuse (R), à l'aide d'un piston (4). Ce dernier est déplacé en direction de la pièce (27). Pour déplacer le piston (4), une pression est appliquée sur une surface supérieure (9) et/ou une surface inférieure (10) du piston. Lorsque le piston (4) entre en contact avec la pièce (27), on mesure la modification de pression et/ou la modification de force pour déterminer le début d'un formage, notamment le début d'un rivetage.
EP99907589A 1998-03-20 1999-03-03 Procede permettant de commander, de surveiller et de controler une operation de formage d'une machine de formage, notamment d'une riveteuse Expired - Lifetime EP1064111B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19812133A DE19812133A1 (de) 1998-03-20 1998-03-20 Verfahren zum Steuern, Überwachen und Überprüfen eines Umformvorganges einer Umformmaschine, insbesondere Nietmaschine
DE19812133 1998-03-20
PCT/EP1999/001365 WO1999048633A1 (fr) 1998-03-20 1999-03-03 Procede permettant de commander, de surveiller et de controler une operation de formage d'une machine de formage, notamment d'une riveteuse

Publications (2)

Publication Number Publication Date
EP1064111A1 true EP1064111A1 (fr) 2001-01-03
EP1064111B1 EP1064111B1 (fr) 2002-10-16

Family

ID=7861581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99907589A Expired - Lifetime EP1064111B1 (fr) 1998-03-20 1999-03-03 Procede permettant de commander, de surveiller et de controler une operation de formage d'une machine de formage, notamment d'une riveteuse

Country Status (9)

Country Link
US (1) US6089062A (fr)
EP (1) EP1064111B1 (fr)
AU (1) AU2727699A (fr)
BR (1) BR9908917A (fr)
CA (1) CA2325040A1 (fr)
CZ (1) CZ12039U1 (fr)
DE (2) DE19812133A1 (fr)
ES (1) ES2185320T3 (fr)
WO (1) WO1999048633A1 (fr)

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US9015920B2 (en) * 1997-07-21 2015-04-28 Newfrey Llc Riveting system and process for forming a riveted joint
US6276050B1 (en) * 1998-07-20 2001-08-21 Emhart Inc. Riveting system and process for forming a riveted joint
DE19846463C2 (de) * 1998-10-08 2002-10-31 Masch Und Werkzeugbau Dorothe Verfahren zum Steuern einer Nietvorrichtung und eine solche Vorrichtung
US6240613B1 (en) * 1998-10-21 2001-06-05 Emhart Inc. Rivet setting tool cycle control
DE19927103A1 (de) * 1999-06-14 2000-12-21 Univ Dresden Tech Verfahren, Vorrichtung sowie Hilfsfügeteil zum mechanischen Fügen
DE19950884A1 (de) * 1999-10-22 2001-04-26 Wella Ag Kombinationsverpackung
US7658089B2 (en) * 2003-02-14 2010-02-09 Newfrey Llc Automated monitoring for clinching joints
ES2234394B1 (es) * 2003-04-30 2006-03-16 Aguirregomezcorta Y Mendicute, S.A. Proceso de remachado.
US7313852B2 (en) * 2003-12-23 2008-01-01 Magna Structural Systems, Inc. Method of forming a rivet using a riveting apparatus
EP1738845B1 (fr) * 2005-06-27 2013-01-16 Gebr. Titgemeyer Gmbh & Co. KG Appareil de rivetage modulaire
JP2007007716A (ja) * 2005-07-04 2007-01-18 Fanuc Ltd ダイクッション機構の衝突判定装置および衝突判定システム
DE102010051978B3 (de) * 2010-11-19 2012-03-08 Audi Ag Vorrichtung zur Bestimmung von Niederhaltekräften
CN102513494A (zh) * 2011-11-30 2012-06-27 苏州工业园区高登威科技有限公司 铆接方法
CN102513496A (zh) * 2011-11-30 2012-06-27 苏州工业园区高登威科技有限公司 铆接机标定方法
US9027220B2 (en) 2012-08-07 2015-05-12 Newfrey Llc Rivet setting machine
CN103157743B (zh) * 2013-04-09 2015-11-25 苏州工业职业技术学院 用于铆压装配机的侧铆压机构
DE102013111594B4 (de) 2013-10-21 2015-04-30 Federal-Mogul Bremsbelag Gmbh Verfahren zur Herstellung eines Trägerkörpers mit Tilgermasse zur Veränderung der Schwingung für einen Bremsbelag einer Scheibenbremse
DE102013111584A1 (de) 2013-10-21 2015-05-07 Federal-Mogul Bremsbelag Gmbh Trägerkörper für einen Bremsbelag einer Scheibenbremse mit Tilgermasse zur Veränderung der Schwingung
DE102014223034A1 (de) * 2014-11-12 2016-05-12 Robert Bosch Gmbh Werkzeug und verfahren zur behandlung eines werkstücks mit einem werkzeugelement eines werkzeugs
CN105057398A (zh) * 2015-09-29 2015-11-18 梧州恒声电子科技有限公司 一种防端子铆反检测夹具
CH712279A1 (de) * 2016-03-18 2017-09-29 Baltec Maschb Ag Vorrichtung zur Beaufschlagung eines Verbindungselements mit einer Beaufschlagungskraft.
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Also Published As

Publication number Publication date
DE59903091D1 (de) 2002-11-21
EP1064111B1 (fr) 2002-10-16
ES2185320T3 (es) 2003-04-16
US6089062A (en) 2000-07-18
BR9908917A (pt) 2000-11-21
AU2727699A (en) 1999-10-18
CZ12039U1 (cs) 2002-03-04
WO1999048633A1 (fr) 1999-09-30
DE19812133A1 (de) 1999-09-23
CA2325040A1 (fr) 1999-09-30

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