DE3219103C2 - - Google Patents

Info

Publication number
DE3219103C2
DE3219103C2 DE3219103A DE3219103A DE3219103C2 DE 3219103 C2 DE3219103 C2 DE 3219103C2 DE 3219103 A DE3219103 A DE 3219103A DE 3219103 A DE3219103 A DE 3219103A DE 3219103 C2 DE3219103 C2 DE 3219103C2
Authority
DE
Germany
Prior art keywords
sheet
temperature profile
determined
yield strength
separated
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 - Fee Related
Application number
DE3219103A
Other languages
German (de)
Other versions
DE3219103A1 (en
Inventor
Gerd-Joachim Dr.Rer.Nat. 4100 Duisburg De Deppe
Hans Heinrich Dr.Rer.Nat. 4134 Rheinberg De Ettwig
Heinz Dr.-Ing. 4000 Duesseldorf De Schneider
Wolfram Dr.-Ing. 4330 Muelheim De Hof
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Priority to DE3219103A priority Critical patent/DE3219103A1/en
Priority to JP58060639A priority patent/JPS58211820A/en
Priority to IT20606/83A priority patent/IT1160777B/en
Priority to FR838307818A priority patent/FR2526684B1/en
Priority to GB08313452A priority patent/GB2120590B/en
Publication of DE3219103A1 publication Critical patent/DE3219103A1/en
Application granted granted Critical
Publication of DE3219103C2 publication Critical patent/DE3219103C2/de
Granted legal-status Critical Current

Links

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
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D33/00—Accessories for shearing machines or shearing devices
    • B23D33/006—Accessories for shearing machines or shearing devices for obtaining pieces of a predetermined length, e.g. control arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/72—Investigating presence of flaws

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Control Of Metal Rolling (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Description

Die Erfindung betrifft ein Verfahren zur automatischen Endenschnittbestimmung an thermomechanisch gewalzten Blechen unter Berücksichtigung zulässiger Streckgrenzenwerte.The invention relates to a method for automatic Final cut determination on thermomechanically rolled sheets under Taking allowable yield strength values into account.

Die Endenabtrennung erfolgte bisher beim Walzen von Blechen nach Erfahrungswerten, die durch Stichprobennahme am erkalteten Blech überprüft wurden, und zwar unter Berücksichtigung der Notwendigkeit, die mechanischen Eigenschaften über die Blechlänge im wesentlichen gleich zu haben.Up to now, the end separation was carried out when sheet metal was rolled Experience based on random sampling on the cooled sheet have been checked, taking into account the Need the mechanical properties over the sheet length to have essentially the same.

Bei dieser Feststellungsart ist eine Optimierung der Endenabtrennung nicht möglich, d. h. es wurden bisher aus Sicherheitsgründen größere Blechendenlängen abgetrennt als notwendig.With this type of determination, an optimization of the End separation not possible, d. H. it has been out so far Larger sheet metal end lengths cut off than for safety reasons necessary.

Aus der DE 16 48 349 A1 ist es bekannt, die Oberflächentemperatur von Walzgut berührungslos zu messen, um damit eine zerstörungsfreie Werkstückprüfung durchführen zu können. Diesem Verfahren liegt die Feststellung zugrunde, daß Fehler im Werkstück z. B. Dopplungen, Einschlüsse und dergleichen sich durch abweichende Temperaturen in oder an der Oberfläche bemerkbar machen und somit eine Prüfung und letztlich Sortierung des Walzgutes zulassen, bevor dies in die weitere Verarbeitung geht.From DE 16 48 349 A1 it is known the surface temperature of rolling stock to be measured without contact in order to achieve a to be able to carry out non-destructive workpiece testing. This The method is based on the finding that defects in the workpiece e.g. B. duplications, inclusions and the like deviating temperatures noticeable in or on the surface make and thus an examination and ultimately sorting the Allow rolling stock before it goes into further processing.

Aufgabe der Erfindung ist es, ein Verfahren zur automatischen Endenschnittbestimmung an thermomechanisch gewalzten Blechen zu schaffen, mit dem eine Minimierung der abzutrennenden Blechendenlängen on-line ermöglicht wird.The object of the invention is a method for automatic Final cut determination on thermomechanically rolled sheets create with a minimization of those to be separated Sheet end lengths on-line is made possible.

Zur Lösung dieser Aufgabe wird erfindungsgemäß ein Verfahren vorgeschlagen, wie im Patentanspruch 1 beschrieben ist. Weiterbildungen ergeben sich aus den Unteransprüchen. According to the invention, a method is used to achieve this object proposed as described in claim 1. Further training results from the subclaims.  

Die Erfindung geht davon aus, daß die Enden jedes Bleches nach Beendigung des Walzvorganges deutlich dunkler und damit kälter als die Blechmitte sind. Untersuchungen haben gezeigt, daß ein Zusammenhang im Verlauf der Oberflächentemperatur mit den Streckgrenzenwerten besteht, und zwar derart, daß die Streckgrenzenwerte zu den Enden ansteigen. The invention assumes that the ends of each sheet after Completion of the rolling process significantly darker and therefore colder than are the middle of the sheet. Studies have shown that a Relation in the course of the surface temperature with the Yield strength values exist in such a way that the Yield strength values increase towards the ends.  

Durch die erfindungsgemäße Erfassung des Oberflächen- Temperaturprofils kann der Abfall durch die abgetrenn­ ten Endbereiche minimiert und gleichzeitig eine Ver­ gleichmäßigung der mechanischen Eigenschaften über die Blechlänge erreicht werden.Through the detection of the surface The waste profile can be separated by the temperature profile minimized end areas and at the same time a ver uniformity of the mechanical properties over the Sheet length can be achieved.

Die zur Durchführung des erfindungsgemäßen Verfahrens notwendigen Meßgeräte wie Pyrometer, Velemeter und ent­ sprechende Datenerfassungseinrichtungen sind bekannt und einfach auf das Verfahren einzurichten. Das Ver­ fahren ist unabhängig von Geschwindigkeitsschwankun­ gen des Walzgutes.To carry out the method according to the invention necessary measuring devices such as pyrometers, velometers and ent Talking data acquisition devices are known and easy to set up on the process. The Ver driving is independent of speed fluctuations against the rolling stock.

Bei dem Walzen von Blechen erfolgt unmittelbar nach dem Walzvorgang ein Richten des Bleches. Am Richtge­ rüst wird nun mit Hilfe eines Pyrometers das Tempera­ turprofil über genau definierte Meßflecke, die eine ovale oder rechteckige Form aufweisen können, ermittelt.When rolling sheet metal follows immediately straightening the sheet during the rolling process. At the direction The tempera is now set up with the help of a pyrometer turprofil over precisely defined measuring spots, which an oval or can have a rectangular shape.

Die hierbei über dem sich bewegenden Blech ermittel­ te Temperaturwerte werden mit Hilfe eines Velemeters einer Längskoordinate des Bleches zugeordnet und einem Rechner übermittelt. Das dem Rechner eingegebene Pro­ gramm ermittelt mit Hilfe einer Ausgleichsrechnung das Temperaturprofil über die Blechlänge. Die Festlegung der abzutrennenden Endenabschnitte erfolgt während des Be­ triebsablaufes durch den Rechner und entsprechende Steuer­ signale an die Trenneinrichtung.Determine this over the moving sheet te temperature values are measured using a velometer assigned to a longitudinal coordinate of the sheet and one Calculator transmitted. The pro entered into the calculator gram determines this with the help of a compensation calculation Temperature profile over the sheet length. The establishment of the end sections to be separated is carried out during loading drive sequence through the computer and corresponding tax signals to the separator.

Claims (4)

1. Verfahren zur automatischen Endenschnittbestimmung an thermomechanisch gewalzten Blechen unter Berücksich­ tigung zulässiger Streckgrenzenwerte, dadurch gekenn­ zeichnet, daß unmittelbar nach dem Richten des gewalzten Bleches die Länge des abzutrennenden Endes on-line in Abhängigkeit von dem berührungslos aufgenommenen Ober­ flächen-Temperaturprofil bestimmt wird.1. A method for automatic end cut determination on thermomechanically rolled sheets taking into account allowable yield strength values, characterized in that immediately after straightening the rolled sheet, the length of the end to be separated is determined on-line depending on the non-contact surface temperature profile recorded. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Messung der Temperatur über einen Meßfleck be­ stimmter Größe und Geometrie erfolgt.2. The method according to claim 1, characterized in that that the measurement of the temperature over a measuring spot be the right size and geometry. 3. Verfahren nach den Ansprüchen 1 und 2, dadurch ge­ kennzeichnet, daß eine genaue Längs-Koordinatenzuordnung des Temperaturprofils über eine integrierende Geschwin­ digkeitsmessung des Walzgutes erfolgt.3. The method according to claims 1 and 2, characterized ge indicates that an exact longitudinal coordinate assignment the temperature profile via an integrating speed  the rolling stock is measured. 4. Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die ermittelten Werte direkt zur Steuerung des Trennschnittes verwendet werden.4. The method according to claims 1 to 3, characterized characterized that the determined values directly to the Control of the separating cut can be used.
DE3219103A 1982-05-17 1982-05-17 METHOD FOR AUTOMATICALLY DETERMINING END CUTTING ON THERMOMECHANICALLY ROLLED SHEETS Granted DE3219103A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE3219103A DE3219103A1 (en) 1982-05-17 1982-05-17 METHOD FOR AUTOMATICALLY DETERMINING END CUTTING ON THERMOMECHANICALLY ROLLED SHEETS
JP58060639A JPS58211820A (en) 1982-05-17 1983-04-06 Method of automatically determining cut section of end section of plate material hot-rolled
IT20606/83A IT1160777B (en) 1982-05-17 1983-04-15 PROCEDURE FOR THE AUTOMATIC DETERMINATION OF THE CUTTING OF THE ENDS IN THERMOMECHANICALLY LAMINATED SHEETS
FR838307818A FR2526684B1 (en) 1982-05-17 1983-05-10 PROCESS FOR THE AUTOMATIC DETERMINATION OF THE CUT OF THE END OF THERMOMECHANICALLY LAMINATED SHEET METAL
GB08313452A GB2120590B (en) 1982-05-17 1983-05-16 Method of determining the end cut on rolled sheets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3219103A DE3219103A1 (en) 1982-05-17 1982-05-17 METHOD FOR AUTOMATICALLY DETERMINING END CUTTING ON THERMOMECHANICALLY ROLLED SHEETS

Publications (2)

Publication Number Publication Date
DE3219103A1 DE3219103A1 (en) 1983-11-17
DE3219103C2 true DE3219103C2 (en) 1990-08-09

Family

ID=6164157

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3219103A Granted DE3219103A1 (en) 1982-05-17 1982-05-17 METHOD FOR AUTOMATICALLY DETERMINING END CUTTING ON THERMOMECHANICALLY ROLLED SHEETS

Country Status (5)

Country Link
JP (1) JPS58211820A (en)
DE (1) DE3219103A1 (en)
FR (1) FR2526684B1 (en)
GB (1) GB2120590B (en)
IT (1) IT1160777B (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959851A (en) * 1933-03-14 1934-05-22 United Eng Foundry Co Circuit control
US3483721A (en) * 1966-12-30 1969-12-16 Automation Ind Inc Material tester
DE1623301A1 (en) * 1967-08-03 1970-12-23 Siemens Ag Method for determining the smallest length or width of rolled goods with irregularly shaped edges
DE2027703A1 (en) * 1969-06-10 1971-04-01 British Steel Corp A method and an associated device for measuring the position of an object without the use of construction parts, which were in real contact with the object to be measured
DE2040084C3 (en) * 1970-08-12 1981-10-22 Mitsubishi Denki K.K., Tokyo Photoelectric measuring and control device for actuating a cutting device for cutting off a flat rolled material guided through a rolling train
GB1575901A (en) * 1975-12-30 1980-10-01 British Steel Corp Shear cropping
DE2824050A1 (en) * 1978-05-30 1979-12-06 Mannesmann Ag Rolled metal sheet end edge trimmer - has two TV cameras focussed on edges to display pictures on screens at control station
EP0057290A1 (en) * 1981-02-02 1982-08-11 Hoogovens Groep B.V. Temperature scanner
DE3265608D1 (en) * 1981-06-19 1985-09-26 Europ Electronic Syst Ltd Crop shear control
DE3151384A1 (en) * 1981-12-24 1983-07-07 Thyssen AG vorm. August Thyssen-Hütte, 4100 Duisburg METHOD FOR MEASURING THE WIDTH, IN PARTICULAR OF THE HEAD, OF SELF-LUMINOUS ROLLING MATERIAL AND METHOD FOR SCOOPING THE HEAD OF SELF-LUMINOUS ROLLING MATERIAL

Also Published As

Publication number Publication date
GB8313452D0 (en) 1983-06-22
DE3219103A1 (en) 1983-11-17
FR2526684A1 (en) 1983-11-18
IT1160777B (en) 1987-03-11
IT8320606A0 (en) 1983-04-15
GB2120590A (en) 1983-12-07
JPS58211820A (en) 1983-12-09
FR2526684B1 (en) 1991-10-31
GB2120590B (en) 1985-09-18

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee