EP3108018A1 - System, production plant, and method - Google Patents
System, production plant, and methodInfo
- Publication number
- EP3108018A1 EP3108018A1 EP15708456.7A EP15708456A EP3108018A1 EP 3108018 A1 EP3108018 A1 EP 3108018A1 EP 15708456 A EP15708456 A EP 15708456A EP 3108018 A1 EP3108018 A1 EP 3108018A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- inductor
- side cooling
- cooling
- heating
- 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- Withdrawn
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
-
- 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 present invention relates to a system for spatially limited heating of a workpiece during its curing and a method for inductive hardening, in particular surface hardening of a workpiece.
- Inductive hardening is a widely used method for the partial hardening of workpieces and is known, for example, from the document DE 10 2012 101 304 A1.
- an alternating magnetic field caused by an inductor is directed to the conductive workpiece.
- the magnetic field induces eddy currents in a target area (an edge region of the workpiece) that cause heating required for the hardening process.
- temperatures of about 1000 ° C in the workpiece edge can be achieved in this way.
- the present invention achieves the object by a system for limited heating in a workpiece hardening process, the system comprising an inductor for partially heating the workpiece and a side cooling for limiting heat generation in the workpiece caused by the inductor, the side cooling being applied directly to the inductor is arranged.
- the present invention has the advantage that by means of the side cooling, the area of the workpiece is adjacent, which immediately adjacent to the target area, where target area is the area to be hardened by the heating. This allows the heat development of the workpiece to be limited to the target area.
- the workpiece is a roller bearing, in particular a large roller bearing.
- Such slewing bearings are used for example in giant wheels or wind turbines. The occurring forces require high demands on the hardening, so that the rolling bearings can guarantee long-term safe operation.
- the inductor comprises a coil or
- Conductor loop in particular a copper coil, with an alternating current with a
- the target area on the workpiece is preferably heated within a few seconds directly to a temperature of about 1000 ° C.
- the side cooling is fixed in position relative to the inductor. By fixing the user of the system is also spared to align a device for cooling in changing workpieces again and again to the desired location on the workpiece.
- the system is arranged stationary and the workpiece is movable relative to the system along a machining direction, wherein the inductor and the side cooling are arranged adjacent to each other along the machining direction.
- the inductor and the side cooling are connected via supply lines with current or quenching means for a local cooling of the workpiece.
- Supply lines should be sized and designed so that they could be carried along in an otherwise necessary movement along the circumference of the workpiece.
- Basic body having an outlet bore for guiding a cooling jet comprising a quenching agent.
- the outlet hole specifies at which point next to the target area the cooling should take place, wherein the outlet bore is advantageously dimensionally stable during the hardening process and thus the orientation of the cooling jet relative to the target area remains substantially constant in the hardening process.
- the outlet bore is inclined to a direction perpendicular to the machining direction.
- the outlet bore is inclined so that the inclination determines the distance between the target area and the area cooled by the quenching means.
- the amount of quenching agent supplied to the workpiece can be determined or determined, adapted to the workpiece.
- the side cooling for metering a volume flow of the cooling jet comprises a pressure reducer and / or a set screw.
- the cooling can be set even more precisely by the side cooling. It is conceivable that via pressure reducer and / or screw fine tuning takes place.
- pressure reducer and adjusting screw change the cooling flow during the curing process or post-corrected.
- pressure reducer and screw are part of a control loop, which ensures a correction of the set cooling current as soon as a temperature is detected in the environment of the system, which exceeds a threshold.
- the adjusting screw can be fixed. As a result, it can be ensured in an advantageous manner that the cooling flow does not change unintentionally during the hardening process.
- the system comprises a further side cooling, which is arranged directly on the inductor and fixable in position, wherein the inductor between the side cooling and the further side cooling is arranged along the machining direction.
- the quenching agent comprises air, water, oil, a solution and / or an emulsion.
- the quenching agent comprises air, water, oil, a solution and / or an emulsion.
- Quenchant before it is fed to the workpiece pre-cooled.
- the appropriate quenching agent can be the desired areas on the workpiece efficiently and selectively cool.
- the system comprises a plurality of inductors
- the inductor has an adapted to the workpiece Induktorgeometrie and / or
- the main body comprises a plurality of outlet holes. As a result, several sections can be cured simultaneously, which advantageously accelerates the curing process.
- the system comprises a drive for a feed movement of the workpiece, wherein the feed movement is controllable by the drive.
- the drive is a rolling drive, the causes the feed movement of the workpiece.
- a continuous movement of the workpiece can be realized by the drive.
- Another object is a production plant for manufacturing a rolling bearing, preferably a large rolling bearing, wherein the manufacturing plant one of the above
- Another object is a method for inductive hardening, in particular for
- the workpiece is moved by means of a drive relative to a system consisting of the inductor and the side cooling, in particular relative to one of the systems described above.
- the workpiece is shaped, preferably cast and / or milled, in a zero-step method step upstream of the first method step. It is conceivable that the workpiece is hardened immediately after it has been cast, forged and / or milled.
- Figure 1 shows in a perspective view a system for spatially limited heating of a workpiece during curing according to a first exemplary
- FIG. 2 shows a system for spatially heating a workpiece during curing according to a second exemplary embodiment of the present invention.
- FIGS. 3a to 3d each show a system for spatially heating a workpiece during curing according to third, fourth, fifth and sixth exemplary embodiments of the present invention.
- FIG. 1 shows a system 1 for spatially heating a workpiece 10 during its hardening according to a first exemplary embodiment of the present invention.
- an inductor 2 is provided, which is supplied with an alternating current and then partially applied to the workpiece 10 via a magnetic field caused by the alternating current, i. spatially limited, acts.
- an edge layer of the workpiece 10 is heated and thereby, preferably within a few seconds, heated to about 1000 ° C.
- the commonly used materials is in the outer layer through the
- quenching occurs at a high cooling rate using a showerhead which directs the quenching agent onto the workpiece.
- a showerhead which directs the quenching agent onto the workpiece.
- it is possible to generate a heat-in-depth or a Rht-profile which, in addition, can also be generated by the temperature distribution in the surface layer of the workpiece or by the frequency of the alternating current
- the workpiece 10 is a rolling bearing, in particular a large rolling bearing, as used for example in giant wheels or wind turbines.
- Such workpieces 10 are preferably formed in advance of the curing process, in particular cast and / or milled. It is provided in particular that a closed curve of the workpiece 10, in particular a running surface of a bearing ring, is hardened. For the hardening of the entire workpiece 10 or only of certain areas of the workpiece 10, it is provided that the inductor 2 in
- the movement along the machining direction B preferably takes place continuously.
- the inductor 2 is directed to an inner side and / or an outer side of the workpiece 10. To prevent the heated edge area from obstructing other areas of the workpiece 10 or others
- the system 1 next to the inductor 2 comprises a side cooling 3, which is arranged directly on the inductor 2.
- a side cooling 3 which is arranged directly on the inductor 2.
- Side cooling 3 is fixed, which it saves the user of the system 1 in an advantageous manner, re-align the side cooling 3 time-consuming repeated when changing the workpiece 10.
- the side cooling 3 is arranged behind the inductor 2 when viewed in the machining direction B, in order to protect already hardened area from renewed and unwanted heating. It is also conceivable that the
- Side cooling 3 is designed such that the side cooling 3 prevents heat transfer from the heated edge region, the target area, in several directions.
- a further side cooling in the processing direction B is arranged in front of the inductor 2 in order to preserve areas of the workpiece 10 that have not yet hardened before the unwanted heating.
- rolling bearings is a limitation of
- FIG. 2 shows a system 1 for spatially limited heating of a workpiece 10 when it is hardened according to a second exemplary embodiment of the present invention, with only part of the embodiment shown in FIG.
- Machining direction B moving workpiece 10 is illustrated.
- this includes System 1 according to the second embodiment of the present invention, two inductors 2, on each of which a side cooling 3 is arranged directly.
- the inductors 2 on each of which a side cooling 3 is arranged directly.
- Inductors 2 with respect to the workpiece 10 arranged opposite to each other, whereby the workpiece 10, both along the inside and along the outside, preferably simultaneously, can be cured.
- the side cooling 3 while the heat development of the workpiece 10 is limited or limited to a heating area 9 in a positive manner.
- FIGS. 3 a to 3 d systems 1 for spatially limited heating of a workpiece 10 during its hardening according to a third, fourth, fifth and a sixth exemplary embodiment of the present invention are respectively shown.
- the systems 1 are each shown in the already known from Figure 2 detailed representation.
- the side cooling 3 has an outlet bore 12, which serves to guide a quenching agent comprehensive cooling flow.
- the quenching agent comprises air, oil, water or a special emulsion or solution.
- the cooling flow directed to the workpiece 10 in the side cooling 3 from FIG. 3 a will be greater than that of the side cooling from FIG.
- the cooling flow can be aligned to a desired range relative to the area heated by the inductor 2 by aligning the outlet bore 12.
- the general profile of the outlet bore 12 is inclined relative to a direction perpendicular to the machining direction B, as shown in the embodiment in Figure 3c.
- the dosage of the volume flow by means of a pressure reducer 17 can be regulated.
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)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014102288.2A DE102014102288A1 (en) | 2014-02-21 | 2014-02-21 | System, manufacturing plant and process |
PCT/EP2015/053347 WO2015124585A1 (en) | 2014-02-21 | 2015-02-17 | System, production plant, and method |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3108018A1 true EP3108018A1 (en) | 2016-12-28 |
Family
ID=52630332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15708456.7A Withdrawn EP3108018A1 (en) | 2014-02-21 | 2015-02-17 | System, production plant, and method |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3108018A1 (en) |
CN (1) | CN106029916A (en) |
DE (1) | DE102014102288A1 (en) |
WO (1) | WO2015124585A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016114895A1 (en) * | 2016-08-11 | 2018-02-15 | Thyssenkrupp Ag | Method for hardening a rolling body raceway of a rolling bearing ring and rolling bearing ring |
DE102020103299A1 (en) | 2020-02-10 | 2021-08-12 | Sms Elotherm Gmbh | Process for inductive surface hardening |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE767227C (en) * | 1939-09-30 | 1952-03-03 | Deutsche Edelstahlwerke Ag | Method and device for surface hardening of metallic objects by means of inductive heating |
DE864561C (en) * | 1949-03-14 | 1953-01-26 | Robert Dr Pribyl | Surface hardening of plate-shaped objects |
DE956231C (en) * | 1944-10-01 | 1957-01-17 | Siemens Ag | Workpiece cooling device on induction hardening machines |
DE955514C (en) * | 1944-02-16 | 1957-01-17 | Siemens Ag | Method and device for inductive surface hardening of workpieces by means of hardened strips placed next to one another |
US3174884A (en) * | 1961-03-04 | 1965-03-23 | Deutsche Edelstahlwerke Ag | Method of surface hardening steel rolls and apparatus for carrying out the same |
JP2000054027A (en) * | 1998-08-06 | 2000-02-22 | Nippon Seiko Kk | Production of linear guide rail |
DE102008009009B3 (en) * | 2008-02-13 | 2009-01-02 | Esser-Werke Gmbh & Co. Kg | Procedure for heat treatment of a tube body of a feed pipe to transport highly abrasive solids, comprises heating and hardening the internal surface of a tube body while subjecting the external surface of the tube body with a coolant |
DE102008012577B3 (en) * | 2008-02-13 | 2009-01-29 | Esser-Werke Gmbh & Co. Kg | Heat-treatment device for pipe body of auto-cement pump, has annular space formed between cylindrical body of receptacle and pipe body |
DE102009053197A1 (en) * | 2009-11-06 | 2011-05-12 | Imo Holding Gmbh | Method and device for inductive hardening of large annular workpieces |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005330545A (en) * | 2004-05-20 | 2005-12-02 | Ntn Corp | High frequency induction hardening method and its apparatus |
JP2008126915A (en) * | 2006-11-24 | 2008-06-05 | Ntn Corp | Heat treatment method of outer member in bearing device for wheel |
JP5105228B2 (en) * | 2007-02-20 | 2012-12-26 | 高周波熱錬株式会社 | Induction heat treatment equipment |
JP2008303402A (en) * | 2007-06-05 | 2008-12-18 | Nsk Ltd | High frequency induction-hardening apparatus and method for manufacturing rolling bearing, rolling bearing |
CN101701285A (en) * | 2009-11-17 | 2010-05-05 | 地质矿产部无锡钻探工具厂 | Device and technique for processing rope drill rod in medium-frequency induction way |
KR101502019B1 (en) * | 2011-07-13 | 2015-03-12 | 토피 고교 가부시키가이샤 | Heat processing system and heat processing method |
DE102012101304A1 (en) | 2012-02-17 | 2013-08-22 | Thyssenkrupp Rothe Erde Gmbh | Method and arrangement for feed surface hardening |
DE102012101309A1 (en) * | 2012-02-17 | 2013-08-22 | Thyssenkrupp Rothe Erde Gmbh | Method for inductive surface hardening of an annular surface |
-
2014
- 2014-02-21 DE DE102014102288.2A patent/DE102014102288A1/en not_active Ceased
-
2015
- 2015-02-17 WO PCT/EP2015/053347 patent/WO2015124585A1/en active Application Filing
- 2015-02-17 CN CN201580009291.3A patent/CN106029916A/en active Pending
- 2015-02-17 EP EP15708456.7A patent/EP3108018A1/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE767227C (en) * | 1939-09-30 | 1952-03-03 | Deutsche Edelstahlwerke Ag | Method and device for surface hardening of metallic objects by means of inductive heating |
DE955514C (en) * | 1944-02-16 | 1957-01-17 | Siemens Ag | Method and device for inductive surface hardening of workpieces by means of hardened strips placed next to one another |
DE956231C (en) * | 1944-10-01 | 1957-01-17 | Siemens Ag | Workpiece cooling device on induction hardening machines |
DE864561C (en) * | 1949-03-14 | 1953-01-26 | Robert Dr Pribyl | Surface hardening of plate-shaped objects |
US3174884A (en) * | 1961-03-04 | 1965-03-23 | Deutsche Edelstahlwerke Ag | Method of surface hardening steel rolls and apparatus for carrying out the same |
JP2000054027A (en) * | 1998-08-06 | 2000-02-22 | Nippon Seiko Kk | Production of linear guide rail |
DE102008009009B3 (en) * | 2008-02-13 | 2009-01-02 | Esser-Werke Gmbh & Co. Kg | Procedure for heat treatment of a tube body of a feed pipe to transport highly abrasive solids, comprises heating and hardening the internal surface of a tube body while subjecting the external surface of the tube body with a coolant |
DE102008012577B3 (en) * | 2008-02-13 | 2009-01-29 | Esser-Werke Gmbh & Co. Kg | Heat-treatment device for pipe body of auto-cement pump, has annular space formed between cylindrical body of receptacle and pipe body |
DE102009053197A1 (en) * | 2009-11-06 | 2011-05-12 | Imo Holding Gmbh | Method and device for inductive hardening of large annular workpieces |
Non-Patent Citations (1)
Title |
---|
See also references of WO2015124585A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102014102288A1 (en) | 2015-08-27 |
WO2015124585A1 (en) | 2015-08-27 |
CN106029916A (en) | 2016-10-12 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20160808 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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AX | Request for extension of the european patent |
Extension state: BA ME |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ZEDLER, TATIANA Inventor name: BURTCHEN, MARCO Inventor name: LANGELS, MATHIEU |
|
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: THYSSENKRUPP ROTHE ERDE GMBH Owner name: THYSSENKRUPP AG |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: THYSSENKRUPP ROTHE ERDE GMBH Owner name: THYSSENKRUPP AG |
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17Q | First examination report despatched |
Effective date: 20180207 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20190918 |