DE19755827A1 - Automobile body panel testing device - Google Patents

Automobile body panel testing device

Info

Publication number
DE19755827A1
DE19755827A1 DE19755827A DE19755827A DE19755827A1 DE 19755827 A1 DE19755827 A1 DE 19755827A1 DE 19755827 A DE19755827 A DE 19755827A DE 19755827 A DE19755827 A DE 19755827A DE 19755827 A1 DE19755827 A1 DE 19755827A1
Authority
DE
Germany
Prior art keywords
handle
testing device
magnetic
test
layers
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.)
Ceased
Application number
DE19755827A
Other languages
German (de)
Inventor
Herbert Dipl Ing Schmitz
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.)
SCHMITZ HERBERT DIPL ING FH
Original Assignee
SCHMITZ HERBERT DIPL ING FH
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 SCHMITZ HERBERT DIPL ING FH filed Critical SCHMITZ HERBERT DIPL ING FH
Priority to DE19755827A priority Critical patent/DE19755827A1/en
Publication of DE19755827A1 publication Critical patent/DE19755827A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/825—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by using magnetic attraction force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2072—Floor protection, e.g. from corrosion or scratching
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
    • G01B7/105—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring thickness of coating

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  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Immunology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The testing device uses a flexible magnetic foil with a sensitive surface (1) having a high coercive field strength, and having spaced opposing poles attached to a handle (3) by a narrowed section (2) for manual movement relative to the tested part. An Independent claim is also included for application of a testing device for detecting nonmagnetic layers of a ferromagnetic material.

Description

Für den Käufer von Gebrauchtkraftfahrzeugen, Oldtimern und eventuell auch Neufahrzeugen, ist es wegen der modernen Kfz.-Reparaturtechniken (Fein-, Leicht-, Zink- und Spritzspachtel sowie Zinn) mit vertretbarem Aufwand nicht möglich, auf Karosserieblechen außer den normalen Lackschichten im µm Bereich aufgetragene Schichten nachzuweisen.For the buyer of used vehicles, vintage cars and possibly also new vehicles, it is because of the modern automotive repair techniques (fine, light, zinc and spray filler and tin) not possible with reasonable effort, on body panels other than to detect normal layers of paint applied in the µm range.

Schichtdickenmeßgeräte sind relativ teuer und nicht für jedermann beim Gebrauchtwagenkauf verfüg- und handhabbar.Layer thickness gauges are relatively expensive and not for everyone when buying used cars available and manageable.

Eine genaue Schichtdickenbestimmung im µm-Bereich ist meist nicht erforderlich, da es oft nur um die Frage geht: Liegt eine Beschädigung bzw. eine Reparatur am Fahrzeug vor, die auf den ersten Blick nicht erkennbar ist?An exact determination of the layer thickness in the µm range is usually not necessary, since it is often only the question is: Is there any damage or repair to the vehicle that affects the is not recognizable at first glance?

Der Erfindung liegt die Aufgabe zugrunde, ein einfach handhabbares, kostengünstiges und transportunempfindliches Prüfgerät zu schaffen, welches nahezu alle Schichten außer den werkseitig aufgebrachten Lackschichten nachweist. Dieses Prüfgerät sollte an ebenen und gewölbten Flächen, über ein akustisches Signal und gegebenenfalls über den aufzuwendenden Kraftaufwand der vom Prüfgerät ausgehenden Haftreibungskräfte, Spachtelschichten entsprechend ihrer Dicke eindeutig und reproduzierbar nachweisen.The invention is based, an easy to handle, inexpensive and the task to create transport-insensitive testing device, which almost all layers except the factory-applied layers of paint. This tester should be level and curved surfaces, via an acoustic signal and, if necessary, the area to be used Force exerted by the static friction forces emanating from the tester, filler layers clearly and reproducibly according to their thickness.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine wechselpolig aufmagnetisiertes Magnetfolienmaterial mit hoher Koerzitivfeldstärke und definierter geometrischer, flexibler Form auf die zuprüfende Fläche aufgelegt wird. Dabei ergibt sich je nach Auftragsdicke von nicht magnetischen Materialien und den daraus resultierenden Anziehungskräften ein mehr oder weniger lautes akustisches "Schnappgeräusch". Darüber hinaus kann an Hand der Haftreibungskräfte durch leichte horizontale Bewegungen des Prüfgerätes ein Fremdschicht­ auftrag von 0,2 mm aufwärts nachgewiesen werden. Als Referenz kann beim Prüfvorgang ein nicht mit Fremdschichten behandeltes ferromagnetisches Material herangezogen werden. This object is achieved in that an alternating magnetized Magnetic foil material with high coercive field strength and defined geometrical, more flexible Form is placed on the surface to be tested. Depending on the order thickness, this results in non-magnetic materials and the resulting attractive forces a more or less loud acoustic "snap sound". In addition, the Static friction forces due to slight horizontal movements of the test device order from 0.2 mm upwards can be proven. A reference can be used during the test process ferromagnetic material not treated with foreign layers can be used.  

Beschreibungdescription

Fig. 1 zeigt eine flexible Magnetfolie mit wechselnden Nord-Süd-Polen im Bereich der sensi­ tiven Fläche (1). Der verjüngte Teil des Prüfgerätes (2) wirkt wie eine Feder und ist keine meßaktive Fläche. Der Teil (3) dient zum Festhalten zwischen Daumen und Zeigefinger, wobei die Oberfläche in diesem Bereich zur besseren Griffsicherheit beschichtet ist (4).
Um Beschädigungen bzw. Kratzer auf den zu prüfenden Oberflächen zu vermieden, ist im vorderen Bereich (5) ein textiler Belag aufgebracht. Fig. 1 shows a flexible magnetic sheet with changing north-south Poland in the sensitive area ( 1 ). The tapered part of the test device ( 2 ) acts like a spring and is not a measuring surface. Part ( 3 ) is used to hold the thumb and forefinger in place, the surface being coated in this area for better grip ( 4 ).
In order to avoid damage or scratches on the surfaces to be tested, a textile covering is applied in the front area ( 5 ).

Fig. 2 zeigt das Auflegen des Prüfgerätes auf das Prüfobjekt. Die Feldlinien der N bzw. S- Pole (7) werden durch das ferromagnetische Material geschlossen. Die durch das Fixieren des Prüfgerätes mit den Fingern hervorgerufene Biegung des mittleren federartigen Teil (2) führt zu einem Anziehung der Magnetfolie und dem daraus resultierenden "Schnappgeräusch". Befinden sich nichtferromagnetische Materialien von mehr als 0,2 mm zwischen Magnetfolie und z. B. Stahlblech, so ist das "Schnappgeräusch" analog der Schichtdicke entsprechend leiser. Bei Schichtdicken von mehr als 3 mm sind keine Anziehungskräfte mehr vorhanden. Fig. 2 shows the placement of the test device on the test object. The field lines of the N and S poles ( 7 ) are closed by the ferromagnetic material. The bending of the middle spring-like part ( 2 ) caused by the fixing of the testing device with the fingers leads to an attraction of the magnetic foil and the resulting “snap noise”. Are non-ferromagnetic materials of more than 0.2 mm between magnetic film and z. B. sheet steel, the "snap noise" is correspondingly quieter analogous to the layer thickness. With layer thicknesses of more than 3 mm, there are no longer any attractive forces.

Fig. 3 zeigt die Handhabung des Prüfgerätes, um anhand von Haftreibungskräften der aktiven Fläche (6) und deren Überwindung durch die Prüfperson auf die entsprechend aufge­ aufgetragene Schichtdicke zu schließen (<0,2 mm). Fig. 3 shows the handling of the test device in order to deduce the correspondingly applied layer thickness (<0.2 mm) based on static friction forces of the active surface ( 6 ) and their overcoming by the test person.

Claims (10)

1. Vorrichtung zum Nachweis von Dia- und Paramagnetischen Schichten auf ferro­ magnetischem Material, dadurch gekennzeichnet, daß eine flexible Magnetfolie eine prüfaktive Fläche (6) mit hoher Koerzitivfeldstärke aus an der Oberfläche der Folie räumlich verteilte Magnetpole (N/S) aufweist und mit einer Handhabe (2,3) versehen ist.1. Device for the detection of dia- and paramagnetic layers on ferro-magnetic material, characterized in that a flexible magnetic film has a test surface ( 6 ) with a high coercive force from spatially distributed magnetic poles (N / S) on the surface of the film and with a Handle ( 2 , 3 ) is provided. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Handhabe (2) gegenüber der im wesentlichen rechteckigen prüfaktiven Fläche (6) verjüngt ist.2. Apparatus according to claim 1, characterized in that the handle ( 2 ) is tapered relative to the substantially rectangular test surface ( 6 ). 3. Vorrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß an der Magnetfolie (1) ein Schutzbelag (5) vorgesehen ist.3. Apparatus according to claim 1 and 2, characterized in that a protective covering ( 5 ) is provided on the magnetic film ( 1 ). 4. Vorrichtung, nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die äußere Form der Handhabe (2) zwischen prüfaktiver Fläche (6) durch die abgestimmte Verjüngung wie eine Feder wirkt.4. The device according to claim 1 to 3, characterized in that the outer shape of the handle ( 2 ) between the test-active surface ( 6 ) acts through the coordinated taper like a spring. 5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Teil (3) durch entsprechende Oberflächenbeschaffenheit griffsicher gestaltet ist.5. Device according to one of the preceding claims, characterized in that the part ( 3 ) is designed so that it is easy to grip by appropriate surface properties. 6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Handhabe (3) durch entsprechende Oberflächenbeschaffenheit griffsicher gestaltet ist.6. Device according to one of the preceding claims, characterized in that the handle ( 3 ) is designed to be secure by appropriate surface properties. 7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Prüffläche (6) zwischen 4 cm und 5 cm breit bzw. zwischen 3,5 cm und 5 cm lang ist.7. Device according to one of the preceding claims, characterized in that the test surface ( 6 ) is between 4 cm and 5 cm wide or between 3.5 cm and 5 cm long. 8. Verwendung einer Vorrichtung nach einem der Ansprüche 1-7 zum Nachweis von nicht magnetischen Schichten auf ferromagnetischem Material.8. Use of a device according to one of claims 1-7 for the detection of not magnetic layers on ferromagnetic material. 9. Verwendung nach Anspruch 8, dadurch gekennzeichnet, daß die Schichtdicke durch Auflegen nachgewiesen wird.9. Use according to claim 8, characterized in that the layer thickness by Hang up is proven. 10. Verwendung nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß beim Auflegen je nach Schichtdickenauftrag ein charakteristisches Geräusch entsteht.10. Use according to claim 8 or 9, characterized in that when hanging up depending on A characteristic noise is produced.
DE19755827A 1997-12-16 1997-12-16 Automobile body panel testing device Ceased DE19755827A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19755827A DE19755827A1 (en) 1997-12-16 1997-12-16 Automobile body panel testing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19755827A DE19755827A1 (en) 1997-12-16 1997-12-16 Automobile body panel testing device

Publications (1)

Publication Number Publication Date
DE19755827A1 true DE19755827A1 (en) 1999-06-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19755827A Ceased DE19755827A1 (en) 1997-12-16 1997-12-16 Automobile body panel testing device

Country Status (1)

Country Link
DE (1) DE19755827A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3440509A1 (en) * 1983-11-07 1985-05-15 DeFelsko Corp., Ogdensburg, N.Y. METHOD AND DEVICE FOR MAGNETICALLY MEASURING A COATING
DE8535133U1 (en) * 1985-12-13 1986-04-03 Hacklinger, Max, 8035 Gauting Thickness gauge
DE8802672U1 (en) * 1988-03-01 1988-04-28 Vier, Manfred, 5205 St Augustin Device for non-destructive testing of the substrate beneath the coating of coated iron materials such as body panels
DE8910201U1 (en) * 1989-08-25 1989-12-14 Vier, Manfred, 5205 St Augustin Device for non-destructive testing of the substrate beneath the coating of coated iron materials such as body panels
DE9207377U1 (en) * 1992-06-01 1992-08-13 Kampmann, Michael, 5840 Schwerte Detector for detecting filler application and any non-regular metallic substance on painted bodies, especially automobile bodies
DE4108914A1 (en) * 1991-03-19 1992-09-24 Wit Ronald W De Magnetic material, esp., metal detector - optically and/or acoustically displays movement of permanent magnet from rest position
DE19533708A1 (en) * 1995-09-12 1997-03-13 Panier Burkhard Dipl Ing Fh Test appts. which establishes quality of coated or enamelled metal sheet esp. of old car bodies

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3440509A1 (en) * 1983-11-07 1985-05-15 DeFelsko Corp., Ogdensburg, N.Y. METHOD AND DEVICE FOR MAGNETICALLY MEASURING A COATING
DE8535133U1 (en) * 1985-12-13 1986-04-03 Hacklinger, Max, 8035 Gauting Thickness gauge
DE8802672U1 (en) * 1988-03-01 1988-04-28 Vier, Manfred, 5205 St Augustin Device for non-destructive testing of the substrate beneath the coating of coated iron materials such as body panels
DE8910201U1 (en) * 1989-08-25 1989-12-14 Vier, Manfred, 5205 St Augustin Device for non-destructive testing of the substrate beneath the coating of coated iron materials such as body panels
DE4108914A1 (en) * 1991-03-19 1992-09-24 Wit Ronald W De Magnetic material, esp., metal detector - optically and/or acoustically displays movement of permanent magnet from rest position
DE9207377U1 (en) * 1992-06-01 1992-08-13 Kampmann, Michael, 5840 Schwerte Detector for detecting filler application and any non-regular metallic substance on painted bodies, especially automobile bodies
DE19533708A1 (en) * 1995-09-12 1997-03-13 Panier Burkhard Dipl Ing Fh Test appts. which establishes quality of coated or enamelled metal sheet esp. of old car bodies

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CARNIOL,Bohdan: Die Kompensierung des Abhebeeffektes bei der induktiven Dickenmessung nach dem Wirbelstromverfahren. In: messtechnik, 5/73, Bd. 81, S.137-141 *

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OP8 Request for examination as to paragraph 44 patent law
8122 Nonbinding interest in granting licences declared
8131 Rejection