WO1984003751A1 - Dispositif de detection des variations d'epaisseurs d'un film lubrifiant pour cables - Google Patents

Dispositif de detection des variations d'epaisseurs d'un film lubrifiant pour cables Download PDF

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Publication number
WO1984003751A1
WO1984003751A1 PCT/SE1984/000090 SE8400090W WO8403751A1 WO 1984003751 A1 WO1984003751 A1 WO 1984003751A1 SE 8400090 W SE8400090 W SE 8400090W WO 8403751 A1 WO8403751 A1 WO 8403751A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire
lubricating film
measuring
draw plate
sensor
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
PCT/SE1984/000090
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English (en)
Inventor
Bruno Nilsson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1984003751A1 publication Critical patent/WO1984003751A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C9/00—Cooling, heating or lubricating drawing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors
    • G01R31/59—Testing of lines, cables or conductors while the cable continuously passes the testing apparatus, e.g. during manufacture

Definitions

  • This invention relates to a device for detecting vari ⁇ ations in thickness of lubricating film of wires by measuring electrical contact resistance at wire drawing in a drawing bench, the wire running between uncoiling and coiling capstans or pulleys via a drawing box provided with lubricant and draw plate and located between the capstans/pulleys, a part of the wire, the lubricating film, the draw plate and additional members associated with the drawing bench forming a closed electric circuit.
  • the new device is based on resistance measurement according to the current/voltage method. Measurement is to be carried out contactless against the moveable measuring object, i.e. the wire, and there is only one galvanic connection with the stationary part of the system. It is the object of the invention to provide a device making it possible to detect tearing in connection with wire drawing and to stop the wire drawing automatically. It is also intended to make it possible to predict wear of the draw plate by means of the new device and to perform quality control.
  • the minimum detectable resistance measured by the aid o the known construction corresponds to the resistance in the wire between the draw plates, thus approximately 10 milliohm.
  • the degree of tearing cannot be recorded as it presupposes resolution at a resistance value below 1 milliohm.
  • a detecting means of the type mentioned above which is primarily characterized in that an A.C. operated transformer is arranged to transmit current contactless to the wire included in the electric circuit and that a capacitive sensor is arranged in a casing galvanically connected to the draw plate for measuring the voltage across the lubricating film, an evaluating means electrically connected to the sensor being arranged to determine the resistance of the lubricating film according to the formula
  • T - U R x k * T
  • i the current through the measuring wire
  • U the voltage measured via the sensor
  • k is a constant.
  • the very wire is preferably included in the secondary winding of the transformer.
  • a detecting device of this kind can be designed for use at reaction times down to the range of 1 millisecond which allows registration of point-like defects at drawing velocities of several meters per second.
  • Fig. 1 shows an example of the main members of a wire drawing bench, in which the resistances and capacitances to be used with the electric circuits according to the principles of the invention are drawn
  • Fig. 2 shows a wire drawing plant with a detecting means which is embodied and installed according to the principles of the invention
  • Fig. 3 shows more in detail the new device according to the invention for providing current in the drawing wire and measurement of the electrical contact resistance be ⁇ tween the wire and the draw plate.
  • the drawing bench arrangement generally shown in Fig. 1 comprises a stationary support 10, on which an uncoiling capstan 12 and a coiling capstan 14 are rotatably mounted. Said capstans 12, 14 are shown only partially on the drawing. Between the capstans 12, 14 there is the so-called drawing box 16, which consists of a lubricant container 18 and a draw plate 22 arranged in a special space 20 and well sealed against the very drawing box by means of packings 24.
  • the draw plate 22 is cooled in operation by means of water 26, which makes contact with the draw plate 22 around its periphery.
  • the wire drawing the wire 28 is forced in known manner through the aperture 30 of the draw plate 22, the lubricating film applied around the wire - not shown - being continuous and uniform in order to obtain the best possible result.
  • FIG. 2 the drawing bench is shown schematically together with the connected detecting device according to the invention, the relative electric circuits corresponding to the construction according to Fig. 1 being indicated.
  • R ⁇ is the electric resistance across the lubricating film
  • R- is the resistance in the draw plate 22
  • R the contact resistance between the un ⁇ coiling capstan 14 and the wire 28, C-, being the corresponding capacitance
  • an oscillator 32 is used in the indicated example, which operates a current transformer 34.
  • the primary winding of the transformer 34 consists of a toroidal coil 36 which encloses the wire 28 which will thus be included in the secondary winding of the transformer 34.
  • the current paths appear from the arrows in Fig. 2.
  • the A.C. current of the measuring circuit is thus obtained contactless. i and i on the drawing indicate the currents through the primary and secondary windings of the transformer 34.
  • a capacitive measuring sensor 38 comprising a tubular electrode 40 as well as an associated amplifier 42 capacitively connected to the wire via the tube electrode 40 is arranged in a casing 44, which is galvanically connected to the draw plate 22 for measuring the voltage U across the lubricating film.
  • the casing 44 shields the measuring sensor 38 from outer electric interference fields.
  • the galvanic connection to the draw plate 22 is arranged so that undesired voltage drops are eliminated.
  • the casing 44 is directly connected to the draw plate 22 via an adapter 46 which is in good contact with a flange 48 projecting from the draw plate 22.
  • the tubular adapter 46 is provided with through-passing slots 50, through which non-desired lubricant scales coming off the lubricant film can easily pass.
  • a special current measuring transformer 58 is connected.
  • a toroidal coil 60 is included which encloses the wire 28 in the same way as the toroidal coil 36.
  • the two trans ⁇ formers 34, 58 are arranged in the immediate vicinity of each other.
  • the toroidal coil 60 is to make possible an accurate current measurement in the cases when great variations in impedance are to expected.
  • the contact resistance R - ⁇ . can then be calculated by dividing the measured voltag °e Ux by the measuring current ili ⁇ passing the electric conductor 62 connected to the toroidal coil
  • the oscillator 32, the measuring sensor 38 as well as the toroidal coil 60 of the transformer 58 are connected to a signal processor 64, which makes it possible to evaluate the measuring values obtained.
  • a signal processor 64 In the electric circuit from the oscillator there is also a detector 66 for failure of power supply.
  • the A.C. voltage signal received from the measuring sensor 38 is demodulated in a demodulator 68 and is then passed on to the signal processor 64.
  • the signal processor 64 can sound the alarm via the output 70 by means of predetermined criteria fed via the adjusting means 72.
  • the detecting device it is also possible to obtain alarm signals - at 74 - at an un ⁇ satisfactory detector function and to analyze data - at 76 - with information about calculated quality or wear of draw plate.
  • values concerning current, voltage and optionally calculated resistance can be obtained via an output 78.
  • the signal processor consists of a microprocessor but may in its simplest form consist of an analogous level discriminator.
  • a processing of signals is made by means of the described equipment after signal conversion, said processing being adapted to the primary object.
  • alarm is- sounded when you are below a predetermined resistance limit, optionally after a certain duration of time.
  • signal analysis is performed to obtain a rapid and safe reaction on changes or in order to correlate the result with experience as to plate wear and production quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

Dispositif de détection des variations d'épaisseurs d'un film lubrifiant pour câbles (28) mesurant la résistance électrique par contact lors de l'étirage du câble sur un banc d'étirage. Dans un banc d'étirage du type ci-décrit, le câble défile entre des cabestans (ou poulies) de débitage et d'enroulement (12 et 14, respectivement), une tête d'étirage (16) pourvue d'un lubrifiant et une filière (22) étant disposées entre les cabestans et les poulies, respectivement. Une partie du câble, le film lubrifiant, la filière et des organes supplémentaires associés au banc d'étirage forment un circuit électrique fermé. Le câble même (28) reçoit du courant sans contact via un transformateur (34), qui est alimenté à partir d'une source de courant alternatif (32). Un détecteur capacitif (38) contenant une électrode tubulaire (40) formant une connexion capacitive entre le câble et un amplificateur (42) est disposé dans un boîtier (44) relié de manière galvanique à la filière pour mesurer la tension au travers du film lubrifiant. Un organe d'évaluation (64) connecté électriquement au détecteur de mesure permet de déterminer la résistance du film lubrifiant selon la formule Rx = k (U/i), où i est le courant traversant le câble à mesurer (28), U est la tension mesurée via le détecteur (38) et k est une constante. Il est possible d'évaluer à l'aide de Rx ce qu'on appelle le déchirement, l'usure de la filière et les variations de qualité du câble produit.
PCT/SE1984/000090 1983-03-16 1984-03-14 Dispositif de detection des variations d'epaisseurs d'un film lubrifiant pour cables Ceased WO1984003751A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8301441A SE432996B (sv) 1983-03-16 1983-03-16 Anordning for att detektera variationer i smorjfilmtjocklek hos trad vid traddragning

Publications (1)

Publication Number Publication Date
WO1984003751A1 true WO1984003751A1 (fr) 1984-09-27

Family

ID=20350399

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1984/000090 Ceased WO1984003751A1 (fr) 1983-03-16 1984-03-14 Dispositif de detection des variations d'epaisseurs d'un film lubrifiant pour cables

Country Status (3)

Country Link
EP (1) EP0139695A1 (fr)
SE (1) SE432996B (fr)
WO (1) WO1984003751A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001048357A3 (fr) * 1999-12-24 2001-12-20 Univ Central Lancashire Systeme de commande de lubrification
EP3902670B1 (fr) 2019-03-20 2023-07-12 Siempelkamp Maschinen- und Anlagenbau GmbH Presse à fonctionnement en continu avec dispositif pour surveiller l'état de lubrification d'une bande rotative sur laquelle un lubrifiant a été appliqué et procédé pertinent

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8064424B2 (en) * 2005-07-22 2011-11-22 Qualcomm Incorporated SDMA for WCDMA
CN106001140B (zh) * 2016-06-13 2018-07-06 亚太轻合金(南通)科技有限公司 一种盘拉机拉拔装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030694A1 (fr) * 1979-12-17 1981-06-24 International Business Machines Corporation Dispositif automatique de graissage pour paliers à glissement et glissières

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030694A1 (fr) * 1979-12-17 1981-06-24 International Business Machines Corporation Dispositif automatique de graissage pour paliers à glissement et glissières

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001048357A3 (fr) * 1999-12-24 2001-12-20 Univ Central Lancashire Systeme de commande de lubrification
US7552799B2 (en) 1999-12-24 2009-06-30 University Of Central Lancashire Lubrication control system
EP3902670B1 (fr) 2019-03-20 2023-07-12 Siempelkamp Maschinen- und Anlagenbau GmbH Presse à fonctionnement en continu avec dispositif pour surveiller l'état de lubrification d'une bande rotative sur laquelle un lubrifiant a été appliqué et procédé pertinent

Also Published As

Publication number Publication date
SE8301441D0 (sv) 1983-03-16
SE432996B (sv) 1984-04-30
EP0139695A1 (fr) 1985-05-08

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