DE4337796A1 - Method for monitoring the quality of crimped joints - Google Patents
Method for monitoring the quality of crimped jointsInfo
- Publication number
- DE4337796A1 DE4337796A1 DE4337796A DE4337796A DE4337796A1 DE 4337796 A1 DE4337796 A1 DE 4337796A1 DE 4337796 A DE4337796 A DE 4337796A DE 4337796 A DE4337796 A DE 4337796A DE 4337796 A1 DE4337796 A1 DE 4337796A1
- Authority
- DE
- Germany
- Prior art keywords
- crimping
- force
- measurement
- curve
- curves
- 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- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0094—Press load monitoring means
-
- 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
- G01L5/0061—Force sensors associated with industrial machines or actuators
- G01L5/0076—Force sensors associated with manufacturing machines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
- H01R43/0486—Crimping apparatus or processes with force measuring means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
- H01R43/0488—Crimping apparatus or processes with crimp height adjusting means
Abstract
Description
Es sind verschiedene Verfahren und Vorrichtungen zur Überwa chung des Crimpvorgangs und zur Kontrolle der Qualität der Crimpverbindungen bekannt. In der DE-OS 37 37 924 wird eine Vorrichtung zum Verbinden von elektrischen Leitungen und Anschlußelementen beschrieben, bei der die von einem Kraft sensor ermittelte maximale Crimpkraft mit einem vorgegebenen Sollwert verglichen wird. Da es jedoch verschiedene Ursachen gibt, die die Qualität einer Crimpverbindung beeinflussen können, ist die Heranziehung des Maximalwertes der Crimp kraft zur Bewertung der Qualität der Crimpverbindung nicht ausreichend. So gibt es Ursachen für eine fehlerhafte Crimp verbindung, die sich vor oder nach Erreichen der maximalen Crimpkraft im momentanen Verlauf der Crimpkraft nachweisen lassen.There are various methods and devices for monitoring the crimping process and to control the quality of the Known crimp connections. In DE-OS 37 37 924 a Device for connecting electrical lines and Connection elements described in which the force sensor determined maximum crimping force with a predetermined Setpoint is compared. However, since there are different causes that affect the quality of a crimp connection the maximum value is the crimp not by force to assess the quality of the crimp connection sufficient. So there are causes of a bad crimp connection that occurs before or after reaching the maximum Verify crimping force in the current crimping force curve to let.
In der DE-OS 40 38 653 wird daher vorgeschlagen, den Verlauf der Crimpkraft inkremental in Abhängigkeit von der jeweili gen Position des Preßstempels zu ermitteln. Durch Verglei chen der gespeicherten Inkrementwerte der tatsächlichen Hüllkurve mit denen einer idealen Hüllkurve und dem Vergleich der durch die Hüllkurven definierten Flächen können Rückschlüsse auf die Qualität der zu bewertenden Crimpverbindung gezogen werden. Nachteilig bei dieser Lösung ist der große bauliche Aufwand zur Ermittlung der Inkrement werte des Wegverlaufs, da dazu ein mechanisch angetrie benes Wegmeßsystem in Form eines Inkrementcodierers notwen dig ist. Ein Vergleich der von den Hüllkurven definierten Flächen bietet nicht immer eine korrekte Aussage über die Qualität des Crimpvorgangs, da sich die Auswirkungen ver schiedener Fehler kompensieren können.DE-OS 40 38 653 therefore proposes the course the crimping force incrementally depending on the respective to determine the position of the ram. By comparison the saved increment values of the actual Envelope with those of an ideal envelope and the Comparison of the areas defined by the envelopes can draw conclusions about the quality of the items to be assessed Crimp connection to be pulled. A disadvantage of this solution is the great structural effort to determine the increment values of the course of the route, as this is mechanically driven benes measuring system in the form of an increment encoder is dig. A comparison of those defined by the envelopes Areas do not always provide a correct statement about the Quality of the crimping process because the effects change can compensate for various errors.
Aus der DE-OS 40 14 221 ist ein Verfahren zur Fertigungs überwachung beim Crimpen bekannt, bei dem aus vorher wegab hängig ermittelten Masterkurven durch Zuordnen einer positi ven und einer negativen Toleranzgrenze ein Toleranzband erzeugt wird, mit welchem die eigentlichen Meßkurven vergli chen werden. Auch hier ist der bauliche Aufwand zum Ausrü sten der Crimppressen durch die Notwendigkeit eines Wegmeß- System sehr hoch, was sich insbesondere beim Nachrüsten von Crimppressen sehr nachteilig auswirkt.From DE-OS 40 14 221 is a method for manufacturing Monitoring of crimping known, from which previously dependent master curves by assigning a positi a tolerance band and a negative tolerance limit is generated with which the actual measurement curves are compared will be. Here, too, the construction effort is sufficient most of the crimping presses due to the need for a System very high, which is particularly important when retrofitting Crimping presses has a very disadvantageous effect.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Überwachen der Qualität von Crimpverbindungen anzugeben, bei dem der gesamte Crimpkraftverlauf zur Bewer tung des Crimpvorgangs herangezogen wird, wobei jedoch auf ein gesondertes Wegmeßsystem verzichtet werden kann.The present invention is based on the object Method for monitoring the quality of crimp connections to indicate, in which the entire crimp force curve to the evaluator device of the crimping process is used, but on a separate measuring system can be dispensed with.
Diese Aufgabe wird durch das im Patentanspruch 1 angegebene Verfahren gelöst.This object is achieved by the specified in claim 1 Procedure solved.
Durch das Normieren, d. h. bezüglich ihrer Kraftmaximalwerte erfolgende Übereinanderlegen der Referenzmeßkurven auf der Zeitachse, besteht keine Notwendigkeit, die einzelnen Mes sungen exakt in Abhängigkeit vom Weg des Preßstempels durch zuführen. Die Anwendung des erfindungsgemäßen Verfahrens erfordert bei sehr hoher Überwachungssicherheit keine Ausrü stung der Crimppressen mit zusätzlichen Wegmeßsystemen.By normalizing, i.e. H. regarding their maximum force values overlaying of the reference measurement curves on the Timeline, there is no need to measure each solutions exactly depending on the path of the ram respectively. The application of the method according to the invention requires no equipment with very high surveillance security Crimping presses with additional measuring systems.
Ein Ausführungsbeispiel der Erfindung wird an Hand der Zeichnungen näher beschrieben.An embodiment of the invention is based on the Drawings described in more detail.
Es zeigenShow it
Fig. 1 eine Schar ermittelter Referenzkurven Fig. 1 is a family of determined reference curves
Fig. 2 eine auf der Zeitachse im Punkt der Maximalkraft normierte Kurvenschar Fig. 2 is a normalized on the time axis at the point of maximum force curves
Fig. 3 eine gemittelte Meßkurve Fig. 3 is an averaged trace
Fig. 4 ein Toleranzband Fig. 4 shows a tolerance band
Fig. 5 eine in das Toleranzband verschobene tatsächliche Meßkurve Fig. 5 is a shifted in the tolerance band actual measurement curve
Fig. 6 ein Blockschaltbild mit den zur Durchführung des Verfahrens notwendigen elektronischen Baugruppen. Fig. 6 is a block diagram with the electronic modules required to carry out the method.
Zur Durchführung des erfindungsgemäßen Überwachungsverfah rens ist ein Kraftsensor im Kraftfluß einer Crimppresse angeordnet. Vor Beginn der eigentlich zu überwachenden Crimpvorgänge wird eine beliebige Anzahl von Referenzcrim pungen durchgeführt, d. h. die Ergebnisse der einzelnen Crimpvorgänge werden auf Ordnungsmäßigkeit der Crimpverbin dung kontrolliert. Die entsprechenden Referenzmessungen erfolgen dabei flankengetriggert und zeitabhängig. Die gemessenen Kraft-Zeit-Verläufe der für gut befundenen Crimp vorgänge werden in einem Analog-/Digitalumsetzer digitali siert und im RAM abgelegt. Die ermittelten Kraft-Zeit- Funktionen werden dann bezüglich ihres Kraftmaximalwertes normiert, indem in der CPU programmgesteuert eine Transfor mation vom Zeitbereich in einen Ortskoordinatenbereich erfolgt, und das Ergebnis wiederum im RAM gespeichert wird. Durch die CPU erfolgt eine Mittelwertsbildung aus allen normierten Meßkurven und die Ablage im RAM. An die gemittel te Meßkurve wird dann eine obere und eine untere beabstande te Kurve angelegt, wodurch ein Toleranzband entsteht. Im einfachsten Fall werden diese Kurven äquidistant oberhalb und unterhalb an die gemittelte Meßkurve gelegt. Das so erhaltene Toleranzband kommt ebenfalls im RAM zur Ablage.To carry out the monitoring method according to the invention rens is a force sensor in the force flow of a crimping press arranged. Before the start of the actually to be monitored Crimping will be any number of reference crimps pungen carried out, d. H. the results of each Crimping operations are based on the correctness of the crimp connection controlled. The corresponding reference measurements are edge-triggered and time-dependent. The measured force-time profiles of the crimp that was found to be good processes are digitalized in an analog / digital converter and stored in RAM. The determined force-time Functions are then maximum force normalized by a Transfor mation from the time range into a location coordinate range takes place, and the result is again stored in RAM. The CPU averages all of them standardized measurement curves and storage in RAM. To the means te curve then becomes an upper and a lower distance te curve created, which creates a tolerance band. in the In the simplest case, these curves are equidistant above and placed below the averaged measurement curve. That so tolerance band obtained is also stored in RAM.
Die Meßkurven der zu überwachenden Crimpvorgänge werden nun durch die CPU mit dem im RAM gespeicherten Toleranzband verglichen. Wird dabei der durch das Toleranzband vorgegebe ne Bereich verlassen, kann der Crimp als Fehlcrimp ausgewie sen werden. In Fig. 5 wird beispielsweise ein Fehlerfall dargestellt, der einen erhöhten Kraftaufbau im Crimpprozeß zur Folge hat, was zu einem Verlassen des Toleranzbandes im mittleren oberen Bereich führt.The measurement curves of the crimping processes to be monitored are now compared by the CPU with the tolerance band stored in RAM. If the area specified by the tolerance band is left, the crimp can be identified as a false crimp. In Fig. 5, for example, an error is shown, which results in an increased build-up of force in the crimping process, which leads to the tolerance band being left in the upper middle region.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4337796A DE4337796A1 (en) | 1993-11-05 | 1993-11-05 | Method for monitoring the quality of crimped joints |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4337796A DE4337796A1 (en) | 1993-11-05 | 1993-11-05 | Method for monitoring the quality of crimped joints |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4337796A1 true DE4337796A1 (en) | 1995-05-11 |
Family
ID=6501893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4337796A Withdrawn DE4337796A1 (en) | 1993-11-05 | 1993-11-05 | Method for monitoring the quality of crimped joints |
Country Status (1)
Country | Link |
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DE (1) | DE4337796A1 (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19749682A1 (en) * | 1997-11-10 | 1999-05-12 | Draexlmaier Lisa Gmbh | Nondestructive testing of a welded connector |
WO1999054092A1 (en) * | 1998-04-22 | 1999-10-28 | Michael Kretzschmar | Pressure tongs |
DE19824600A1 (en) * | 1998-06-02 | 1999-12-16 | Thyssenkrupp Stahl Ag | Method for testing integrity of weld seam connecting two metal work pieces, e.g. strips or sheets |
EP1071173A2 (en) * | 1999-07-23 | 2001-01-24 | Yazaki Corporation | Terminal crimping quality decision method/device and frictional wear state detection method of crimping die |
DE10041237A1 (en) * | 2000-08-22 | 2002-03-21 | Freudenberg Carl Kg | Machine function quality evaluation method for impact press, uses press force measuring sensor for read-out of dynamic press force during press operation |
DE10232470A1 (en) * | 2002-07-17 | 2004-02-05 | Bernhard Schäfer Werkzeug- und Sondermaschinenbau GmbH | Method and device for quality assurance of crimp connections |
EP1520642A1 (en) * | 2003-10-01 | 2005-04-06 | Eldes S.n.c. di Paolo Bellotto & C. | Method and system for controlling a moulding plant |
DE10127854B4 (en) * | 2000-06-12 | 2006-02-02 | Yazaki Corp. | Method for checking the crimping state of a crimping terminal and crimping terminal therefor |
DE102004043776B3 (en) * | 2004-09-10 | 2006-06-14 | Bernhard Schäfer Werkzeug- und Sondermaschinenbau GmbH | Motor-driven crimping device |
DE102008030773A1 (en) | 2008-06-28 | 2009-12-31 | GFE - Gesellschaft für Fertigungstechnik und Entwicklung Schmalkalden e.V. | Electronic measuring equipment integration arrangement for four-mandrel crimping pliers, has adjusting unit provided with sensor system consisting of material measure elements with electrically or electromagnetically operating read heads |
EP2156944A1 (en) | 2008-08-21 | 2010-02-24 | Siemens Aktiengesellschaft | Drive device for controlling a pressing procedure of a press |
WO2010116339A1 (en) * | 2009-04-09 | 2010-10-14 | Schleuniger Holding Ag | Method of monitoring a crimping process, crimping press and computer program product |
WO2012078180A3 (en) * | 2010-12-07 | 2012-07-26 | Tyco Electronics Corporation | Crimping apparatus having a crimp quality monitoring system |
CN103123327A (en) * | 2013-02-22 | 2013-05-29 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Fitting crimping quality detecting device |
US8904616B2 (en) | 2009-04-09 | 2014-12-09 | Schleuniger Holding Ag | Method of monitoring a crimping process, crimping press and computer program product |
US9300102B2 (en) | 2010-04-13 | 2016-03-29 | Schleuniger Holding Ag | Crimping press |
EP3396796A1 (en) | 2017-04-25 | 2018-10-31 | Wezag GmbH Werkzeugfabrik | Press, crimping or cutting tool and tool group |
EP3307453A4 (en) * | 2015-06-15 | 2019-02-20 | Milwaukee Electric Tool Corporation | Hydraulic crimper tool |
DE102019101016A1 (en) * | 2019-01-16 | 2020-07-16 | Harting Electric Gmbh & Co. Kg | Method and device for checking the quality of a crimp |
EP3820001A1 (en) | 2019-11-11 | 2021-05-12 | WEZAG GmbH & Co. KG | Crimping pliers, group of crimping pliers and use of a die half |
EP4243222A1 (en) | 2022-03-09 | 2023-09-13 | WEZAG GmbH & Co. KG | Crimping tool force sensor and crimping tool |
-
1993
- 1993-11-05 DE DE4337796A patent/DE4337796A1/en not_active Withdrawn
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19749682A1 (en) * | 1997-11-10 | 1999-05-12 | Draexlmaier Lisa Gmbh | Nondestructive testing of a welded connector |
WO1999054092A1 (en) * | 1998-04-22 | 1999-10-28 | Michael Kretzschmar | Pressure tongs |
DE19824600A1 (en) * | 1998-06-02 | 1999-12-16 | Thyssenkrupp Stahl Ag | Method for testing integrity of weld seam connecting two metal work pieces, e.g. strips or sheets |
EP1071173A2 (en) * | 1999-07-23 | 2001-01-24 | Yazaki Corporation | Terminal crimping quality decision method/device and frictional wear state detection method of crimping die |
EP1071173A3 (en) * | 1999-07-23 | 2002-04-03 | Yazaki Corporation | Terminal crimping quality decision method/device and frictional wear state detection method of crimping die |
DE10127854B4 (en) * | 2000-06-12 | 2006-02-02 | Yazaki Corp. | Method for checking the crimping state of a crimping terminal and crimping terminal therefor |
DE10041237A1 (en) * | 2000-08-22 | 2002-03-21 | Freudenberg Carl Kg | Machine function quality evaluation method for impact press, uses press force measuring sensor for read-out of dynamic press force during press operation |
DE10041237B4 (en) * | 2000-08-22 | 2006-02-02 | Engberts & Schäfer GmbH | Method and device for detecting machine quality on stop presses |
DE10232470A1 (en) * | 2002-07-17 | 2004-02-05 | Bernhard Schäfer Werkzeug- und Sondermaschinenbau GmbH | Method and device for quality assurance of crimp connections |
EP1520642A1 (en) * | 2003-10-01 | 2005-04-06 | Eldes S.n.c. di Paolo Bellotto & C. | Method and system for controlling a moulding plant |
DE102004043776B3 (en) * | 2004-09-10 | 2006-06-14 | Bernhard Schäfer Werkzeug- und Sondermaschinenbau GmbH | Motor-driven crimping device |
DE102008030773B4 (en) * | 2008-06-28 | 2013-12-24 | GFE - Gesellschaft für Fertigungstechnik und Entwicklung Schmalkalden e.V. | Arrangement for integrating measuring electronics in crimping tools |
DE102008030773A1 (en) | 2008-06-28 | 2009-12-31 | GFE - Gesellschaft für Fertigungstechnik und Entwicklung Schmalkalden e.V. | Electronic measuring equipment integration arrangement for four-mandrel crimping pliers, has adjusting unit provided with sensor system consisting of material measure elements with electrically or electromagnetically operating read heads |
EP2156944A1 (en) | 2008-08-21 | 2010-02-24 | Siemens Aktiengesellschaft | Drive device for controlling a pressing procedure of a press |
US8904616B2 (en) | 2009-04-09 | 2014-12-09 | Schleuniger Holding Ag | Method of monitoring a crimping process, crimping press and computer program product |
WO2010116339A1 (en) * | 2009-04-09 | 2010-10-14 | Schleuniger Holding Ag | Method of monitoring a crimping process, crimping press and computer program product |
US8671538B2 (en) | 2009-04-09 | 2014-03-18 | Schleuniger Holding Ag | Method of monitoring a crimping process, crimping press and computer program product |
US9300102B2 (en) | 2010-04-13 | 2016-03-29 | Schleuniger Holding Ag | Crimping press |
US9331447B2 (en) | 2010-12-07 | 2016-05-03 | Tyco Electronics Corporation | Crimping apparatus having a crimp quality monitoring system |
WO2012078180A3 (en) * | 2010-12-07 | 2012-07-26 | Tyco Electronics Corporation | Crimping apparatus having a crimp quality monitoring system |
CN103123327B (en) * | 2013-02-22 | 2015-11-04 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Gold utensil crimp quality prospecting apparatus |
CN103123327A (en) * | 2013-02-22 | 2013-05-29 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Fitting crimping quality detecting device |
US11685028B2 (en) | 2015-06-15 | 2023-06-27 | Milwaukee Electric Tool Corporation | Hydraulic crimper tool |
EP3307453A4 (en) * | 2015-06-15 | 2019-02-20 | Milwaukee Electric Tool Corporation | Hydraulic crimper tool |
US10618151B2 (en) | 2015-06-15 | 2020-04-14 | Milwaukee Electric Tool Corporation | Hydraulic crimper tool |
EP3396796A1 (en) | 2017-04-25 | 2018-10-31 | Wezag GmbH Werkzeugfabrik | Press, crimping or cutting tool and tool group |
US10958030B2 (en) | 2017-04-25 | 2021-03-23 | Wezag Gmbh Werkzeugfabrik | Jaw tool and jaw tool group |
WO2020147889A1 (en) | 2019-01-16 | 2020-07-23 | Harting Electric Gmbh & Co. Kg | Method and device for checking the quality of a crimping |
CN113316873A (en) * | 2019-01-16 | 2021-08-27 | 哈廷电子有限公司及两合公司 | Method and device for checking the quality of crimping |
DE102019101016A1 (en) * | 2019-01-16 | 2020-07-16 | Harting Electric Gmbh & Co. Kg | Method and device for checking the quality of a crimp |
CN113316873B (en) * | 2019-01-16 | 2024-03-01 | 哈廷电子有限公司及两合公司 | Method and device for checking crimp quality |
EP3820001A1 (en) | 2019-11-11 | 2021-05-12 | WEZAG GmbH & Co. KG | Crimping pliers, group of crimping pliers and use of a die half |
US11346732B2 (en) | 2019-11-11 | 2022-05-31 | Wezag Gmbh & Co. Kg | Crimping pliers, group of crimping pliers and use of a die half |
EP4007087A1 (en) | 2019-11-11 | 2022-06-01 | WEZAG GmbH & Co. KG | Crimping tool |
EP4243222A1 (en) | 2022-03-09 | 2023-09-13 | WEZAG GmbH & Co. KG | Crimping tool force sensor and crimping tool |
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