EP0446425A1 - Procédé et dispositif pour contrôler et régler le comportement à la déformation de pièces lors de leur traitement thermique - Google Patents

Procédé et dispositif pour contrôler et régler le comportement à la déformation de pièces lors de leur traitement thermique Download PDF

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Publication number
EP0446425A1
EP0446425A1 EP90122010A EP90122010A EP0446425A1 EP 0446425 A1 EP0446425 A1 EP 0446425A1 EP 90122010 A EP90122010 A EP 90122010A EP 90122010 A EP90122010 A EP 90122010A EP 0446425 A1 EP0446425 A1 EP 0446425A1
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EP
European Patent Office
Prior art keywords
workpiece
temperature
tool
pressure
flow
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.)
Withdrawn
Application number
EP90122010A
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German (de)
English (en)
Inventor
Karl Heinz Schweikert
Karl Heess
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.)
Karl Heess GmbH and Co Maschinenbau
Original Assignee
Karl Heess GmbH and Co Maschinenbau
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 Karl Heess GmbH and Co Maschinenbau filed Critical Karl Heess GmbH and Co Maschinenbau
Publication of EP0446425A1 publication Critical patent/EP0446425A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • 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
    • C21D1/673—Quenching devices for die 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

Definitions

  • the invention relates to a method and a device for controlling and regulating the shape change behavior of workpieces to be subjected to heat treatment during the heat treatment process.
  • the geometry i.e.
  • the constructive design of components has a further decisive influence on the distortion when hardening workpieces.
  • Different wall thicknesses and complicated non-symmetrical shapes inevitably lead to severe deformations during heating and quenching.
  • the different hardenability in a steel batch should also be noted. This is often due to the steel manufacturing process. It is Z. For example, it is well known that large ingots have greater curability variations than small ones.
  • Optimizing the process parameters such as temperature, atmosphere etc. and keeping them as constant as possible, have a significant influence not only on the hardness and structural condition, but also on the delay in hardness.
  • Another possibility is to install automated measuring devices after the hardening machine. In this way, ongoing corrections of the parameters can be made via control loops and drifting measured values can be corrected. If a measured workpiece is outside the tolerance range, it can be automatically rejected and / or sent to a post-processing step. Measuring after the hardening machine means 100% control, which means that faulty workpieces can be eliminated from the further production flow.
  • the invention is therefore based on the object of providing a method and a device for controlling and regulating the dimensional accuracy of workpieces to be subjected to heat treatment during the working process, with almost 100% of the workpieces produced being within the tolerance specifications with regard to workpiece diameter, planicity, ovality, hardness and structural condition should be.
  • the measurement, control and regulation should take place during the structural transformation with controlled outflow of the thermal energy.
  • the method according to the invention provides for Controlling and regulating the shape change behavior of workpieces to be subjected to during the heat treatment process before the cooling medium used for cooling is used to measure the temperature behavior, with the respective temperature of the cooling medium being recorded as the actual value at defined points in time, this actual value being compared with predetermined target values and the required correcting variable is corrected by introducing at least one coolant flow with a temperature deviating from the actual size into the possibly circulating coolant flow and additionally or alternatively the flow rate or the flow rate of the coolant flow in the cooling circuit and / or the mechanical and thermal variables such as pressure and heating parameters in accordance with the required setpoint can be changed.
  • a special procedure of the invention provides that in addition to the coolant temperature measurement by means of appropriate thermal receptors on the workpiece or on the tool or temperature-compensated sensors, a workpiece or tool temperature measurement by measuring the geometric behavior via a displacement measuring system, the mandrel and / or the workpiece receiving or is integrated in the plan support of the workpiece and actual values are obtained by measuring the pressure change behavior, which flow into the control chain.
  • the comparison of the actual values with the target values is carried out by feeding the determined values into a data processing system, in which the corresponding target values are stored and available for comparison with all actual values to be taken into account, after which, in the event of a deviation from the target values, the actuators are influenced accordingly.
  • the device for carrying out this method consists of a die receiving the workpiece with a press ram and / or expanding mandrel, the device having a cooling circuit for the purpose of a cooling medium flowing around the workpiece.
  • at least one sensor arranged in the cooling circuit, in the flow direction spatially downstream of the workpiece, for detecting the coolant temperature as the actual value is provided, with at least one actuator for correcting the flow rate and / or flow velocity and / or at least in the feed line in the flow direction spatially in front of the workpiece has a further supply line for a cooling medium with a temperature deviating from the cooling circuit, it being provided that at least one thermal receptor for detecting the workpiece temperature and / or at least one temperature-compensated sensor is arranged in the workpiece support. Alternatively or additionally, these measures are taken on the tool.
  • the aim of the device according to the invention is to incorporate as many actual values as possible into the control chain, it also being taken into account that measuring sensors are arranged in the area of the flat support and / or that the mandrel receiving the workpiece and / or the press ram is inserted Provides path measuring system or a pressure measuring system for detecting the vertical movement or the pressure occurring.
  • thermocouple the sensor for detecting the temperature of the coolant is in the form of a thermocouple, a transmitter and measuring amplifier being assigned to these sensors.
  • tool 3 is to be understood to mean all elements influencing workpiece 2, such as mandrel 6, hold-down 11, flat support 7, die 15, etc.
  • the workpiece 2 is located on the plane or workpiece support 7.
  • the receptors or sensors or sensors 4 can be seen.
  • the reference numerals 4a of the sensor are arranged in the fault direction, spatially after the workpiece 2, for detecting the coolant temperature; with the reference symbol 4b the thermal receptors or sensors of the tools 3, such as mandrel 6, flat support 7, Hold-down 11 and the thermal receptors or sensors on the workpiece 2 are identified by the reference symbol 4c.
  • the cooling medium is defined by reference number 1 and its flow direction by the arrow display.
  • the flow lines, the amount of cooling medium flowing in and, if appropriate, the coolant supply are manipulated at a lower or higher temperature by the supply lines 8 and 10 in accordance with the values which have flowed into the control chain and the control requirements.
  • the arrangement of the receptors or sensors 4 is selected as an example in this embodiment. Of course, it is within the meaning of this invention to vary the position of the receptors or sensors 4 according to the requirements and the efficiency and, if necessary, to increase their number and to optimize the arrangement and quantity.
  • Figure 3 shows, for example, the plan or workpiece support 7 with position measuring system 5 and pressure measuring system 12.
  • the reference number 5a denotes the position measuring system on the mandrel 6 and 5b the position measuring system on the plane support 7.
  • Pressure load cells can possibly be used to record the forces.
  • these values can also be used to prevent mechanical influences, e.g. B. back pressure on the tools to change according to requirements.

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)
  • Forging (AREA)
EP90122010A 1990-02-13 1990-11-17 Procédé et dispositif pour contrôler et régler le comportement à la déformation de pièces lors de leur traitement thermique Withdrawn EP0446425A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904004295 DE4004295A1 (de) 1990-02-13 1990-02-13 Verfahren und vorrichtung zum haerten von werkstuecken mittels presswerkzeugen
DE4004295 1990-02-13

Publications (1)

Publication Number Publication Date
EP0446425A1 true EP0446425A1 (fr) 1991-09-18

Family

ID=6399984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122010A Withdrawn EP0446425A1 (fr) 1990-02-13 1990-11-17 Procédé et dispositif pour contrôler et régler le comportement à la déformation de pièces lors de leur traitement thermique

Country Status (2)

Country Link
EP (1) EP0446425A1 (fr)
DE (1) DE4004295A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1006539C2 (nl) * 1997-07-10 1999-01-12 Skf Ind Trading & Dev Werkwijze voor het uitvoeren van een warmtebehandeling op metalen ringen, en aldus verkregen lagerring.
DE10352622A1 (de) * 2003-11-12 2005-06-16 Bayerische Motoren Werke Ag Verfahren und Vorrichtung zum Abschrecken von Werkstücken
WO2006075120A1 (fr) * 2005-01-17 2006-07-20 Etudes Et Constructions Mecaniques Cellule de trempe au gaz pour pieces en acier
WO2009137940A1 (fr) * 2008-05-16 2009-11-19 Mattson Technology Canada, Inc. Procédé et appareil de prévention de rupture de pièce ouvrée
US8454356B2 (en) 2006-11-15 2013-06-04 Mattson Technology, Inc. Systems and methods for supporting a workpiece during heat-treating
US9627244B2 (en) 2002-12-20 2017-04-18 Mattson Technology, Inc. Methods and systems for supporting a workpiece and for heat-treating the workpiece

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4135313A1 (de) * 1991-10-25 1993-04-29 Ipsen Ind Int Gmbh Verfahren zum abkuehlen einer werkstueckcharge innerhalb eines waermebehandlungsprozesses
DE29504242U1 (de) * 1995-03-11 1995-05-04 Karl Heess GmbH & Co Maschinenbau, 68623 Lampertheim Spreizdorn für Härtevorrichtungen
DE102009001012B3 (de) 2009-02-19 2010-06-10 Ema Indutec Gmbh Härtemaschine und Verfahren zum induktiven Fixturhärten
DE102019006203A1 (de) * 2019-05-09 2020-11-12 Aerospace Transmission Technologies GmbH Fixtur zum Abschrecken und Abschrecken und Härten eines Zahnrads
DE102019006202A1 (de) 2019-05-09 2020-11-12 Aerospace Transmission Technologies GmbH Fixtur zum Abschrecken und Härten eines Werkstücks mit gezielt ansteuerbaren Kanälen zum Zuführen von Abschreckmedium
DE102019006201A1 (de) 2019-05-09 2020-11-12 Aerospace Transmission Technologies GmbH Verfahren und Fixturhärtevorrichtung zum Fixturhärten von Bauteilen
DE102024126575A1 (de) 2024-09-16 2026-03-19 Liebherr-Aerospace Lindenberg Gmbh Vorrichtung und Verfahren zur Druckmessung bei der Fixturhärtung
DE102024134036A1 (de) * 2024-11-20 2026-05-21 Liebherr-Aerospace Lindenberg Gmbh Vorrichtung und Verfahren zum Fixturhärten

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4360189A (en) * 1980-07-28 1982-11-23 Duncan James P Quench press
DE3307041A1 (de) * 1982-11-26 1984-05-30 Jenny Pressen AG, 8500 Frauenfeld Verfahren und vorrichtung zum serienmaessigen, verzugsarmen haerten von werkstuecken sowie anwendung des verfahrens
DE8806545U1 (de) * 1988-05-19 1988-07-07 Karl Heess GmbH & Co, 6840 Lampertheim Vorrichtung zur kontrollierten Beeinflussung des Innen- und/oder Außendurchmessers beim Abkühlvorgang von zu härtenden Werkstücken
US4844427A (en) * 1988-02-01 1989-07-04 The Gleason Works Quenching apparatus
DE9001640U1 (de) * 1990-02-13 1990-04-19 Karl Heess GmbH & Co, 68623 Lampertheim Vorrichtung zum Steuern und Regeln des Formveränderungsverhaltens von einer Wärmebehandlung zu unterwerfenden Werkstücken während des Wärmebehandlungsverfahrens

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1508432A1 (de) * 1966-08-18 1969-10-23 Olin Mathieson Vorrichtung zur Schnellabschreckung von Metallblechen oder -streifen
US3533261A (en) * 1967-06-15 1970-10-13 Frans Hollander Method and a device for cooling hot-rolled metal strip on a run-out table after being rolled
CH647811A5 (de) * 1981-06-19 1985-02-15 Maag Zahnraeder & Maschinen Ag Verfahren zur verringerung des haerteverzugs beim einsatzhaerten grosser zahnkraenze aus stahl und hierfuer geeigneter stuetzkoerper.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4360189A (en) * 1980-07-28 1982-11-23 Duncan James P Quench press
DE3307041A1 (de) * 1982-11-26 1984-05-30 Jenny Pressen AG, 8500 Frauenfeld Verfahren und vorrichtung zum serienmaessigen, verzugsarmen haerten von werkstuecken sowie anwendung des verfahrens
US4844427A (en) * 1988-02-01 1989-07-04 The Gleason Works Quenching apparatus
DE8806545U1 (de) * 1988-05-19 1988-07-07 Karl Heess GmbH & Co, 6840 Lampertheim Vorrichtung zur kontrollierten Beeinflussung des Innen- und/oder Außendurchmessers beim Abkühlvorgang von zu härtenden Werkstücken
DE9001640U1 (de) * 1990-02-13 1990-04-19 Karl Heess GmbH & Co, 68623 Lampertheim Vorrichtung zum Steuern und Regeln des Formveränderungsverhaltens von einer Wärmebehandlung zu unterwerfenden Werkstücken während des Wärmebehandlungsverfahrens

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1006539C2 (nl) * 1997-07-10 1999-01-12 Skf Ind Trading & Dev Werkwijze voor het uitvoeren van een warmtebehandeling op metalen ringen, en aldus verkregen lagerring.
WO1999002744A1 (fr) * 1997-07-10 1999-01-21 Skf Engineering & Research Centre B.V. Procede d'execution d'un traitement thermique sur des bagues metalliques, et bagues de roulement ainsi obtenues
US6585834B1 (en) 1997-07-10 2003-07-01 Skf Engineering And Research Centre B.V. Method for performing a heat treatment of metallic rings, and bearing ring thus obtained
US9627244B2 (en) 2002-12-20 2017-04-18 Mattson Technology, Inc. Methods and systems for supporting a workpiece and for heat-treating the workpiece
DE10352622A1 (de) * 2003-11-12 2005-06-16 Bayerische Motoren Werke Ag Verfahren und Vorrichtung zum Abschrecken von Werkstücken
WO2006075120A1 (fr) * 2005-01-17 2006-07-20 Etudes Et Constructions Mecaniques Cellule de trempe au gaz pour pieces en acier
FR2880898A1 (fr) * 2005-01-17 2006-07-21 Const Mecaniques Sa Et Cellule de trempe au gaz pour pieces en acier
US8454356B2 (en) 2006-11-15 2013-06-04 Mattson Technology, Inc. Systems and methods for supporting a workpiece during heat-treating
WO2009137940A1 (fr) * 2008-05-16 2009-11-19 Mattson Technology Canada, Inc. Procédé et appareil de prévention de rupture de pièce ouvrée
US9070590B2 (en) 2008-05-16 2015-06-30 Mattson Technology, Inc. Workpiece breakage prevention method and apparatus

Also Published As

Publication number Publication date
DE4004295C2 (fr) 1992-01-23
DE4004295A1 (de) 1991-08-14

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