DE648323C - Device for finding cracks in magnetizable objects - Google Patents

Device for finding cracks in magnetizable objects

Info

Publication number
DE648323C
DE648323C DES112742D DES0112742D DE648323C DE 648323 C DE648323 C DE 648323C DE S112742 D DES112742 D DE S112742D DE S0112742 D DES0112742 D DE S0112742D DE 648323 C DE648323 C DE 648323C
Authority
DE
Germany
Prior art keywords
magnetizable objects
finding
cracks
finding cracks
test
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.)
Expired
Application number
DES112742D
Other languages
German (de)
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.)
Sperry Products Inc
Original Assignee
Sperry Products Inc
Publication date
Priority to DES112742D priority Critical patent/DE648323C/en
Application granted granted Critical
Publication of DE648323C publication Critical patent/DE648323C/en
Expired 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
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9093—Arrangements for supporting the sensor; Combinations of eddy-current sensors and auxiliary arrangements for marking or for rejecting

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Credit Cards Or The Like (AREA)

Description

Einrichtung zum Auffinden von fihseh,ii@ magnetisierbaren Gegenständen Es ist bereits vorgcsclilagen worden, einen magnetischen Leiter nach Rihstellen dadurch zu untersuchen, dali eine Prüfvorrichtung für das Auffinden von Längsrissen und eine von ihr getrennte Prüfvorrichtung zum Aulfinden von Querrissen nacheinander verwendet wurden; die in:tgnetisclien Felder standen dabei im rechten Winkel zueinander. Eine derartige Unterteilung der Prüfvorrichtung ist in der Praxis nachteilig. Gegenstand der vorliegenden Erfindung ist die t@b @erwindun- dieses Mangels. Das geschieht dadurch, dal,') beide 1sraftflul:)erzeuger als eine Einheit zusammenbebaut sind und die beiden Anzeigevorrichtungen die Prüfei-gebirisse schaubildlich nehOiieinander auf derselben Sclireilitititci-lage anzeigen. Auf diese Wcisc werden die verscltiedenst;2n Arten von Fehlstellen in einem magnetischen Gegenstand, z. B. in einer ' Eisenbad inschiene, unUnterbrochen aufgezeichnet, und zwar in einem einzigen 1'rüfvorgittig.Device for finding fihseh, ii @ magnetizable objects It has already been proposed to set up a magnetic conductor to investigate thereby, dali a test device for the finding of longitudinal cracks and a test device separate from it for finding transverse cracks one after the other were used; the in: tgnetic fields were at right angles to each other. Such a subdivision of the test device is disadvantageous in practice. object The present invention addresses this shortcoming. This happens by the fact that ') both power generators are assembled as one unit and the two display devices show the test details diagrammatically next to one another show on the same sclireilitititci location. On this wcisc the most varied; 2n Types of voids in a magnetic object, e.g. B. in an 'iron bath in-track, recorded continuously, in a single audit trail.

Auf der Zeichnung ist eine Afisfülirtnigsform der Erfindung; und zwar als Einrichtung zum Untersuchen von Gleisschienen dargestellt.In the drawing is a form of the invention; in fact shown as a device for examining track rails.

Die beiden rechtwinklig zueinander angeordneten Kraftiluberzeuger to, to' sind nahe aneinander als eine Einheit in einem Ti-ä,cr 41 zusammengebaut. Der Träger .li sitzt etwas oberhalb der Schiene an einem Schlitten 4.o. Die Kraftilutßerzeuger bestehen zweckmäßig aus Elektromagneten, die von einer entsprechenden Kraftduell, aas erregt werden. Mit jedem Kraftiiußerzeuger ist eine gesonderte Prüfspule verbunden. Von jeder Prüfspule führen Leitungen zu Verst:irkern A, .=1', die entsprechend getrennte Elektromagn<°te N, N' für Schreibstifte P, P' steuern. Dies auf einer gemeinsamen Karte C schreibenden Stifte P, I" werden durch .elektrische Spannungen zur Wirkung gebracht, die in den Prüfspulen durch Kraftflußschwankungen erzeugt werden.The two power generators arranged at right angles to one another to, to 'are assembled close together as one unit in a Ti-ä, cr 41. The carrier .li sits a little above the rail on a slide 4.o. The power flow producers consist expediently of electromagnets, which by a corresponding force duel, aas be aroused. A separate test coil is connected to each force generator. Lines lead from each test coil to amplifiers A,. = 1 ', the correspondingly separated Control solenoids N, N 'for pens P, P'. This on a common Pens P, I "that write on card C are activated by electrical voltages brought, which are generated in the test coils by force flux fluctuations.

Dit die Kraftflußerzeuger nahe beieinander als eine Einheit ausgebildet sind, beeinflußt eine Fehlstelle in der Schiene den einen oder den anderen oder beide Kraftflüsse, je nach der Art der Fehlstelle. Eine harte Stelle in der Schiene verändert den hraftfluß in beiden Richtungen. so dah in beiden Prüfspulen Spannungen induziert werden; die Anzeige erfolgt durch beide Schreibstifte, wie es bei 2o dargestellt ist. Indessen beeinflußt ein QuerriVt nur den Kraftfluß vom Kra-ftflußerzeuger 1o, so dal:) nur der Schreibstift P eine Anzeige vermittelt; in ähnlicher .Weise ruft ein Längsschlitz nur eine Anzeige 22 des Schreibstiftes P hervor.So the force flux generators are formed close together as one unit are, a flaw in the rail affects one or the other or both power flows, depending on the type of defect. A hard point in the rail changes the flow of force in both directions. so there are voltages in both test coils be induced; the display is made by both pens, as shown at 2o is. Meanwhile, a transverse rift only influences the power flow from the power flow generator 1o, so that :) only the pen P conveys an advertisement; in a similar way a longitudinal slot only a display 22 of the pen P out.

Claims (1)

PATENTANSPRUCH Einrichtung zttm Auffinden von Rissen in inagnetisierbaren Gegenständen, bestehend aus zwei im allgemeinen senkrecht zueinander gerichteten magnetischen Kraftflußerzeugern mit voneinander getrennten Anzeigevorrichtungen, dadurch gekennzeichnet, da13 beide Kraftflußerzeuger (1o, 1o') als eine Einheit zusammengebaut sind und die beiden Anzeigevorrichtungen (P N, PN') die Prüfergebnisse schaubildlich nebeneinander auf derselben Schreibunterlage anzeigen. PATENT CLAIM Device for locating cracks in non-magnetizable objects, consisting of two magnetic flux generators directed generally perpendicular to each other with separate display devices, characterized in that both power flux generators (1o, 1o ') are assembled as a unit and the two display devices (PN, PN ') display the test results graphically side by side on the same writing pad.
DES112742D Device for finding cracks in magnetizable objects Expired DE648323C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES112742D DE648323C (en) Device for finding cracks in magnetizable objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES112742D DE648323C (en) Device for finding cracks in magnetizable objects

Publications (1)

Publication Number Publication Date
DE648323C true DE648323C (en) 1937-07-28

Family

ID=7531998

Family Applications (1)

Application Number Title Priority Date Filing Date
DES112742D Expired DE648323C (en) Device for finding cracks in magnetizable objects

Country Status (1)

Country Link
DE (1) DE648323C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745697C (en) * 1938-06-15 1944-12-01 Device for non-destructive testing of materials
DE746226C (en) * 1939-03-08 1944-12-16 Schiff Und Maschb Ag Deutsche Device for locating defects in iron workpieces using magnetic methods

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745697C (en) * 1938-06-15 1944-12-01 Device for non-destructive testing of materials
DE746226C (en) * 1939-03-08 1944-12-16 Schiff Und Maschb Ag Deutsche Device for locating defects in iron workpieces using magnetic methods

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