WO2018047017A1 - Procédé de surveillance d'un processus de durcissement dans une machine de durcissement par induction - Google Patents

Procédé de surveillance d'un processus de durcissement dans une machine de durcissement par induction Download PDF

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Publication number
WO2018047017A1
WO2018047017A1 PCT/IB2017/001512 IB2017001512W WO2018047017A1 WO 2018047017 A1 WO2018047017 A1 WO 2018047017A1 IB 2017001512 W IB2017001512 W IB 2017001512W WO 2018047017 A1 WO2018047017 A1 WO 2018047017A1
Authority
WO
WIPO (PCT)
Prior art keywords
inductor
workpieces
hardening
machine
cooling medium
Prior art date
Application number
PCT/IB2017/001512
Other languages
German (de)
English (en)
Inventor
Harry Kroetz
Christian Krause
Friedrich GAISER
Original Assignee
EMAG GmbH & Co. KG
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 EMAG GmbH & Co. KG filed Critical EMAG GmbH & Co. KG
Publication of WO2018047017A1 publication Critical patent/WO2018047017A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to a method for monitoring the hardening process in one
  • DE 2 322 720 A shows a circuit arrangement for monitoring an induction hardening plant.
  • the amount of heat supplied to the hardening plant is determined as electrical energy by switching the induction voltage and the induction current proportional voltages to a multiplier. Because the power supplied changes during the heating phase, it is integrated over the heating time.
  • the output of the multiplier is connected to the input of an integrator.
  • a disadvantage with controlled hardening devices is that certain errors, for example in the resonant circuit of the alternator, can not be detected because they are compensated by the control.
  • Fig. 1 shows an induction hardening machine in a schematic representation
  • Fig. 2 shows an inductor in an enlarged view
  • FIG. 1 an induction hardening machine 1 is shown schematically.
  • the workpiece 2 is rotationally driven in the working space 14 of the induction hardening machine 1 in a workpiece holding device consisting of a workpiece spindle 3 and a tailstock 4
  • An inductor 5 is movably guided on a carriage 6 on a traveling column 7 in the vertical direction (Z-axis).
  • the traveling column 7 is movable in the horizontal direction (X axis).
  • the power supply is housed together with a machine control 9 a cabinet 8 and is connected via the high current cable 17 to the inductor 5.
  • a spray nozzle 1 1 is arranged, from which quenching of the workpieces 2, a cooling medium 12 exits.
  • the cooling medium 12 is collected in a collecting container 13 and conveyed from there with a pump 15 to the spray nozzle 1 1.
  • the quality of the cooling medium 12 is checked continuously with a viscometer 14.
  • the measured values determined in this case are transmitted via a connection (not shown) to the machine controller 9 and compared with reference values. So far it has been customary to control the viscosity by measuring the refractive index. However, this measuring method has the disadvantage that the proportion of polymer chains broken under the influence of light and heat can not be determined. The viscosity is advantageously measured in the viscometer 14 with the aid of ultrasound. This measuring procedure also provides information about the condition of the polymer chains.
  • Heating can be measured at the inductor 5 Induktorfußschreib U s .
  • This electrical characteristic is directly related to the directly generated magnetic flux and varies depending on the temperature of the workpiece. Different error factors, eg wrong material or loading with wrong
  • a storage medium 18, preferably an RFI D chip is attached to the inductor 5.
  • important performance data such as the remaining service life or pending maintenance intervals can be read out and buffered. If there are any tool defects or errors, the process no longer starts.
  • information about manufacturing tolerances of the tool (inductor) can be given to adjust the axis if necessary independently.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Induction Heating (AREA)

Abstract

La présente invention concerne un procédé de surveillance d'un processus de durcissement dans une machine de durcissement par induction (1) comprenant une commande machine (9) et une unité d'écriture-lecture (16), un viscosimètre (14), des pièces (2) étant chauffées au moyen d'un inducteur (5) puis trempées au moyen d'un agent de refroidissement (12), l'inducteur (5) présentant un support d'enregistrement (18), le procédé comprenant les étapes consistant à : a. lire le support d'enregistrement (18) au moyen de l'unité d'écriture-lecture (16) avant le début de la production et comparer les données d'état avec des valeurs théoriques; b. chauffer les pièces (2) avec mesure simultanée de la tension du pied d'inducteur Us et comparer à des valeurs théoriques prédéterminées; c. refroidir les pièces (2) au moyen de l'agent de refroidissement (12) avec mesure simultanée de la viscosité de l'agent de refroidissement (12) au moyen du viscosimètre (14) et comparer à des valeurs théoriques prédéterminées.
PCT/IB2017/001512 2016-09-12 2017-09-14 Procédé de surveillance d'un processus de durcissement dans une machine de durcissement par induction WO2018047017A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016010888.6A DE102016010888A1 (de) 2016-09-12 2016-09-12 Verfahren zum Überwachen des Härteprozesses in einer Induktionshärtemaschine
DE102016010888.6 2016-09-12

Publications (1)

Publication Number Publication Date
WO2018047017A1 true WO2018047017A1 (fr) 2018-03-15

Family

ID=60943050

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/001512 WO2018047017A1 (fr) 2016-09-12 2017-09-14 Procédé de surveillance d'un processus de durcissement dans une machine de durcissement par induction

Country Status (2)

Country Link
DE (1) DE102016010888A1 (fr)
WO (1) WO2018047017A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2322720A1 (de) 1973-05-05 1974-11-21 Volkswagenwerk Ag Schaltungsanordnung zur ueberwachung einer induktions-haerteanlage
US5630957A (en) * 1995-01-12 1997-05-20 Adkins; Douglas R. Control of power to an inductively heated part
DE10143652A1 (de) * 2000-09-06 2002-04-25 Volkswagen Ag Verfahren zum Induktionshärten von Werkstücken
US20060213588A1 (en) * 2005-03-23 2006-09-28 Ntn Corporation Induction heat treatment method, induction heat treatment installation and induction-heat-treated product
EP2407564A1 (fr) * 2009-03-12 2012-01-18 Neturen Co., Ltd. Système de gestion pour trempe haute fréquence

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537513A1 (de) 1985-10-22 1987-04-23 Ema Elektromaschinen Schultze Vollautomatisch arbeitende induktionshaertemaschine
US8447574B2 (en) 2010-08-13 2013-05-21 GM Global Technology Operations LLC Method for simulating transient heat transfer and temperature distribution of aluminum castings during water quenching

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2322720A1 (de) 1973-05-05 1974-11-21 Volkswagenwerk Ag Schaltungsanordnung zur ueberwachung einer induktions-haerteanlage
US5630957A (en) * 1995-01-12 1997-05-20 Adkins; Douglas R. Control of power to an inductively heated part
DE10143652A1 (de) * 2000-09-06 2002-04-25 Volkswagen Ag Verfahren zum Induktionshärten von Werkstücken
US20060213588A1 (en) * 2005-03-23 2006-09-28 Ntn Corporation Induction heat treatment method, induction heat treatment installation and induction-heat-treated product
EP2407564A1 (fr) * 2009-03-12 2012-01-18 Neturen Co., Ltd. Système de gestion pour trempe haute fréquence

Also Published As

Publication number Publication date
DE102016010888A1 (de) 2018-03-15

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