EP2366806A1 - Maschine zur Durchführung der Wärmebehandlung von mechanischen Teilen in Form von Festkörpern in Rotation, insbesondere zum Härten von Schienenrädern oder dergleichen - Google Patents

Maschine zur Durchführung der Wärmebehandlung von mechanischen Teilen in Form von Festkörpern in Rotation, insbesondere zum Härten von Schienenrädern oder dergleichen Download PDF

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Publication number
EP2366806A1
EP2366806A1 EP10155890A EP10155890A EP2366806A1 EP 2366806 A1 EP2366806 A1 EP 2366806A1 EP 10155890 A EP10155890 A EP 10155890A EP 10155890 A EP10155890 A EP 10155890A EP 2366806 A1 EP2366806 A1 EP 2366806A1
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EP
European Patent Office
Prior art keywords
tank
mechanical part
machine according
treatment fluid
nozzles
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Granted
Application number
EP10155890A
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English (en)
French (fr)
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EP2366806B1 (de
Inventor
Andrea Pedrali
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GENERAL FORNI S.R.L.
Original Assignee
Elti Suisse Sa
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Priority to EP10155890.6A priority Critical patent/EP2366806B1/de
Publication of EP2366806A1 publication Critical patent/EP2366806A1/de
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Publication of EP2366806B1 publication Critical patent/EP2366806B1/de
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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D9/0037—Rotary furnaces with vertical axis; Furnaces with rotating floor
    • 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
    • C21D9/34—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group

Definitions

  • the present invention relates to a machine for performing heat treatment of mechanical parts shaped like solids of rotation, in particular for hardening railroad wheels or the like.
  • Hardening for satisfying the requirements of mechanical strength, usually affects the tread of the wheel by including or excluding the protruding lateral edge that axially delimits said tread on one side, or can be required also for other parts of the wheel, such as for example the annular portion located on the side of the wheel that is furthest from the lateral edge.
  • the immersion method consists in supporting the wheel so that its axis is vertical and in immersing it gradually in a tank that contains a cooling liquid.
  • the immersion of the wheel can vary, and specific regions of the wheel can be shielded so that the cooling performed by the liquid affects only certain regions, resulting in a heat treatment effect that is differentiated by regions, known as "selective hardening".
  • This hardening method in contrast with an extremely simple plant for its execution, has the drawback of not allowing high rates of cooling and thus of being unsuitable to thermally treat newly engineered materials that require higher cooling rates.
  • Another drawback of this method is the reduced possibility of setting up and controlling precisely the hardening parameters, which makes it practically impossible to repeat precisely the treatment in order to obtain substantially equal mechanical characteristics for an equal number of mechanical parts treated.
  • the reduced cooling rate has the effect of slowing down the entire production line.
  • the spray method is generally performed by supporting the wheel so that its axis is vertical and by arranging nozzles so that they face the tread or other preset regions of the wheel and propelling, by means of said nozzles, a cooling liquid against the region to be cooled.
  • the wheel is generally turned about its own axis.
  • a method of this type is disclosed, for example, in EP-1772558 .
  • This method too, has the drawback of reaching cooling rates that are not always able to completely meet the hardening requirements of newly engineered steels.
  • the aim of the present invention is to provide a machine for performing heat treatment of mechanical parts shaped like a solid of rotation, particularly for hardening railroad wheels or the like, which can operate according to parameters that can vary precisely so as to meet the most disparate requirements.
  • an object of the invention is to provide a machine that can repeat heat treatment cycles precisely so as to obtain qualitatively high and uniform treatment effects.
  • Another object of the invention is to provide a machine that can be configured and can operate both according to the immersion method and according to the spray method, depending on the requirements.
  • Another object of the invention is to provide a machine that, in particular, can reach without problems the desired cooling rates required in the heat treatment of recently formulated steels.
  • a machine for performing heat treatment of mechanical parts shaped like a solid of rotation, particularly for hardening railroad wheels or the like comprising:
  • the machine according to the invention comprises a tank 2 that is adapted to accommodate at least a portion of a mechanical part 3 to be treated, which is constituted, in the illustrated embodiment, by a railroad wheel.
  • the tank 2 has a polygonal plan shape, but it may also have a circular plan shape or another shape according to the requirements.
  • the machine is provided with means 61 for supplying a treatment fluid to the tank 2 and with means 62 for supporting the mechanical part 3 to be treated so that the rotation axis of the mechanical part 3 is arranged substantially vertically.
  • the machine comprises first means 63 for dispensing a treatment fluid, which are arranged in the tank 2 and have a dispensing direction that is oriented towards the lateral surface of the mechanical part 3 that is arranged on the supporting means 62 in the tank 2.
  • the tank 2 extends around a vertical axis which constitutes the main axis 4 of the machine.
  • the means 61 for supplying the treatment fluid to the tank 2 comprise one or more ports 5 which are connected to a first chamber 6 which extends around the main axis 4 below the bottom of the tank 2. Said first chamber 6 is connected, by means of connecting ducts 7 which have a vertical axis and pass through a second chamber 8, which also extends around the main axis 4 between the first chamber 6 and the bottom of the tank 2, to an annular duct 9 located on the bottom of the tank 2.
  • the annular duct 9 supplies outlets 10 which have a vertical axis and on which filler nozzles 11 are fitted; said nozzles have an elbow-shaped body so that the dispensing direction of the jets emitted by said filler nozzles 11 is substantially horizontal and inclined with respect to a direction which is radial with respect to the main axis 4.
  • the corners of the tank 2 are delimited by vertical walls 12 in which the face that is oriented towards the main axis 4 is shaped like a portion of a cylindrical surface whose axis coincides with the main axis 4.
  • the set of said vertical walls 12 defines a cylindrical surface interrupted by recesses 13.
  • the corner regions 14 delimited by the lateral walls of the tank 2 and by said vertical walls 12 are connected, by means of adapted passages 15 defined on the bottom of said corner regions 14, to the second chamber 8, which in turn is connected to a central discharge chamber 16, which is connected to a discharge port 17.
  • the upper edge of the vertical walls 12 that delimit the corner regions 14 of the tank 2 defines the level of the free surface 80 of the treatment fluid that is introduced in the tank 2 when it is in liquid state, i.e., when it is constituted by a treatment liquid.
  • the bottom of the tank 2 is connected, by means of one or more drain holes 18, to the central discharge chamber 16.
  • drain holes 18 there are plugs 19, which can be actuated automatically in order to block the associated drain hole 18 in order to allow the filling of the tank 2 with the treatment liquid or in order to open the associated drain hole 18 so as to discharge the treatment liquid introduced previously into the tank 2.
  • each plug 19 is composed of a plate 20 which has a vertical axis and is provided, on its lower side, with a gasket 21 that can be engaged with the bottom of the tank 2 around the associated drain hole 18.
  • Each plug 19, below the plate 20, has guiding fins 22 which can be engaged slidingly with the corresponding drain hole 18 so as to keep the plug 19 correctly positioned with respect to the corresponding drain hole 18.
  • the plate 20 is fixed to the upper end of a rod 23 having a vertical axis, which is connected to the stem of the piston of a fluid-operated cylinder 24 whose body is supported by the supporting structure of the machine.
  • the fluid-operated cylinder 24 can be supplied with a pressurized fluid so as to actuate the upward movement of the rod 23 and of the plate 20, i.e., actuate the opening of the corresponding drain hole 18.
  • the upward movement of the rod 23 and the plate 20 is contrasted by a return spring 25, which, when the fluid-operated cylinder 24 is connected to the discharge, causes the lowering of the rod 23 and of the plate 20, actuating the closure of the corresponding drain hole 18.
  • the machine is provided with means for varying the position of the mechanical part 3 with respect to the free surface 80 of the treatment liquid in the tank 2.
  • a hollow cylinder 26 whose axis coincides with the main axis 4 is fixed to the center of the bottom of the tank 2.
  • the hollow cylinder 26 supports, so that it can slide along the main axis 4 and rotate about said main axis 4, a main shaft 27, to the upper end of which a disk-like element 28 is coaxially and jointly connected.
  • the main shaft 27 and the disk-like element 28 constitute the supporting means 62 for the mechanical part 3, which is rested on the disk-like element 28, as will become better apparent hereinafter.
  • the means for varying the position of the mechanical part 3 with respect to the free surface 80 of the treatment liquid in the tank 2 comprise means for the translation of the supporting means 62 along a substantially vertical direction.
  • the translation means comprise a fluid-operated cylinder 29, which is fixed with its body to the lower end face of the hollow cylinder 26 and is arranged coaxially to the main shaft 27 and thus with its axis at the main axis 4.
  • the fluid-operated cylinder 29 is connected, by means of the stem of its piston, to the lower end of the main shaft 4 so that an actuation of the fluid-operated cylinder 29 generates a lifting or lowering of the main shaft 27 along the main axis 4.
  • the main shaft 27 is connected to the output shaft of an electric gearmotor 30, whose actuation causes the rotation of the main shaft 27 about its own axis, which coincides with the main axis 4 with respect to the hollow cylinder 26 and thus the tank 2.
  • the main shaft 27 is supported by the hollow cylinder 26 so that it can rotate about its own axis by way of pairs of bearings 31, 32 and the main shaft 27 is provided with a tab 33 that extends along part of the length of the main shaft 27, so as to maintain the connection, during rotation about the main axis 4, between the main shaft 27 and the output shaft of the gearmotor 30 during the translation of the main shaft 27 along the main axis 4.
  • the disk-like element 28 closes in an upward region a cylindrical jacket 34, whose axis coincides with the main axis 4, and such cylindrical jacket 34 mates, so as to allow axial sliding, with the hollow cylinder 26 by means of the interposition of sealing gaskets 35.
  • the inside of the hollow cylinder 26 is connected to the central discharge chamber 16 by one or more lateral openings 36.
  • the first dispensing means 63 comprise first nozzles 37 for dispensing treatment fluid, which face the lateral surface of the mechanical part 3 arranged on the supporting means 62, and there are first means for moving the first nozzles 37 along a direction with a radial component with respect to the main axis 4.
  • first nozzles 37 are supported by box-like bodies 38, which are arranged around the main axis 4 and are accommodated in the recesses 13 located between the vertical walls 12 that delimit the corner regions 14 of the tank 2.
  • Each box-like body 38 is shaped substantially like a parallelepiped and bears the first nozzles 37 on one of its lateral faces.
  • Each box-like body 38 is supported, so that it can rotate about a vertical axis, at the end of a supporting arm 39, which is fixed, with its opposite end, to the upper end of a shaft 40 which has a vertical axis and is supported, so that it can rotate about its own axis, by the tank 2.
  • Each box-like body 38 is fixed to a pivot 41, which has a vertical axis and is mated, so that it can rotate about its own axis, with the supporting arm 39.
  • the pivot 41 is connected, by means of a linkage 42, to a region of the tank 2 that is spaced from the axis of the shaft 40. Thanks to this connection, a rotation of the shaft 40 about its own axis in relation to the tank 2 causes a rotation of the supporting arm 39 and therefore a movement of the corresponding box-like body 38 toward or away from the main axis 4 and, at the same time, causes a partial rotation of the box-like body 38 about the axis of the pivot 41 in relation to the supporting arm 39.
  • the length of the connecting rod 42 can be adjusted during the setup of the machine so as to adjust, according to the requirements, the orientation of the first nozzles 37 with respect to the lateral surface of the mechanical part 3 that they face.
  • each shaft 40 protrudes downwardly from the bottom of the tank 2 and the ends of the several shafts 40 are kinematically connected to each other by way of linkages 43 so that the rotation imposed on one shaft 40 about its own axis is transmitted to the other shafts 40.
  • the first movement means comprise a linear actuator 44, which is operated by a corresponding electric motor 45, which is connected to the bottom of the tank 2 and is connected to a shaft 40.
  • a supply coupling 46 is arranged around the end portion of each one of the shafts 40 that protrudes downwardly from the tank 2, above the region where the linkages 43 are connected, the supply coupling being connected to a corresponding duct 47 for supplying the treatment fluid to the first nozzles 37.
  • Each shaft 40, at the corresponding supply coupling 46 is provided with lateral openings for the flow of the treatment fluid from the supply coupling 46 to the axial duct 48.
  • the machine according to the invention comprises second means 64 for dispensing a treatment fluid, which are arranged proximately to the bottom of the tank 2 and propel such fluid toward the surface of the mechanical part 3 that is directed toward the bottom of the tank 2.
  • Said second dispensing means 64 comprise second nozzles 50 for dispensing the treatment fluid, which face the surface of the mechanical part 3, arranged on the supporting means 62, that is directed toward the bottom of the tank 2, and there are second means for moving the second nozzles 50 along a direction with a radial component with respect to the main axis 4.
  • each one of the second nozzles 50 is connected to a hollow arm 51, which is arranged inside the tank 2 proximately to its bottom on a substantially horizontal plane and is fitted over the upper end of a hollow shaft 52, which has a vertical axis and is arranged substantially flush with the bottom of the tank 2.
  • Each hollow shaft 52 is supported by the tank 2 so that it can rotate about its own axis and passes through the second chamber 8, the first chamber 6 and a third chamber 53, which is arranged below the first chamber 6 around the central discharge chamber 16.
  • Each hollow shaft 52 protrudes, with its lower end, below the third chamber 53 and said lower end can be connected, in a manner similar to the one described with reference to the shafts 40, to an actuator which can be operated so as to cause the rotation of the hollow shafts 52 about their respective axes.
  • each one of the hollow shafts 52 is connected, by means of a lever system 54, to one of the shafts 40 so as to be able to use, in order to move the second nozzles 50 around the axis of the corresponding hollow shaft 52, the linear actuator 44 that moves the first nozzles 37 around the axis of the shafts 40.
  • the lever system 54 that connects the hollow shafts 52 to the shafts 40 can be provided so as to transmit the rotary motion between the two shafts 40 and 52 with an adequate ratio for the correct positioning of the second nozzles 50 with respect to the mechanical part 3.
  • each hollow shaft 52 that is located in the third chamber 53 is crossed by at least one passage 55 for the treatment fluid that must be supplied to the second nozzles 50, and the third chamber 53 can be connected, through a port 56, to a supply duct of such fluid.
  • the hollow arms 51 may be omitted and the upper end of the hollow shafts 52 may be closed by a plug, as shown in Figure 5 .
  • the disk-like element 28 is arranged so that its axis lies at the main axis 4 and defines, with its upper face, a substantially horizontal resting contact surface for the mechanical part 3.
  • the disk-like element 28 has a central protrusion 57 for facilitating the positioning of the mechanical part 3 with its axis at the main axis 4.
  • the disk-like element 28 can have a larger diameter than the one shown, and its upper face can be provided with a sealing layer, which can engage the regions of the mechanical part 3 that one wishes to preserve from contact with the treatment fluid.
  • the machine is provided with means for controlling the position of the disk-like element 28 along the main axis 4 and with means for controlling the position of the first nozzles 37 and of the second nozzles 50, if provided, with respect to the main axis 4.
  • the means for controlling the position of the disk-like element 28 along the main axis 4 may be constituted by a linear encoder, of a known type, which is associated or integrated with a fluid-operated cylinder 29.
  • the means for controlling the position of the first nozzles 37 and/or of the second nozzles 50 can be constituted by an encoder, of a known type, which is fitted on, or connected to, the linear actuator 44, which as mentioned moves both the first nozzles 37 and the second nozzles 38.
  • the machine comprises a control and monitoring element 58 of the programmable electronic type, by way of which it is possible to control and vary the parameters of the heat treatment according to preset programs, so as to be able to achieve precise and reliable repeatability of the treatments performed.
  • control and monitoring element 58 is connected to the fluid-operated cylinder 29 and to the encoder that controls the positioning of the disk-like element 28 along the main axis 4 so as to actuate and control the translation of the disk-like element 28 and therefore of the mechanical part 3 along the main axis 4, and also vary the speed with which the mechanical part 3 is translated along the main axis 4.
  • the control and monitoring element 58 is connected to the electric gearmotor 30, which can be provided with a variable-speed electric motor with an encoder or other device for controlling the rotation rate, so as to control and actuate the speed at which the mechanical part 3 is rotated about the main axis 4.
  • the control and monitoring element 58 is connected to a central supply unit 59, which supplies the nozzles 11, 37 and 50 so as to vary, according to preset programs, the characteristics of the treatment fluid.
  • the treatment fluid that is introduced in the tank 2 through the filler nozzles 11, as well as the treatment fluid that is supplied to the nozzles 37 and 50 is preferably constituted by water or compressed air, optionally with the addition of specific polymers, or by a mixture of said components.
  • the several components of the treatment fluid supplied to the tank 2 and of the treatment fluid supplied to the nozzles 37 and 50 are supplied to the central supply unit 59, in which it is possible to vary the composition, the flow-rate and the pressure of the fluid that is supplied to the nozzles 11, 37 and 50 by way of drivable components of a known type, such as for example electric valves, flow meters, pressure gauges, flow-rate regulators and pressure regulators.
  • the central supply unit 59 by way of the electric valves, the flow regulators and pressure regulators, the flow-rate and pressure measurement units, is controlled by the control and monitoring element 58 according to preset programs.
  • heating means and temperature sensors which are also functionally connected to the control and monitoring element 58, which varies and controls the treatment fluid temperature according to preset programs.
  • control and monitoring operations described above instead of being managed by the control and monitoring element 58, might be managed manually.
  • the components of the machine to be managed manually are not connected to the control and monitoring element 58 or may be disconnected from such control and monitoring element 58 if needed.
  • box-like bodies 38 are supplied individually through corresponding ducts 47, so that the control and monitoring element 58 can actuate, simultaneously or sequentially, all or part of the first nozzles 37.
  • nozzles 11, 37 and 50 can be of the flat fan, solid stream, solid cone or hollow cone type according to the requirements.
  • the tank 2 is filled with the treatment liquid, which is introduced in the tank 2 by way of the filling nozzles 11, which are supplied by the annular duct 9, in turn supplied through the port 5.
  • the free surface 80 of the treatment liquid is at the level of the upper end of the vertical walls 12 and the box-like bodies 38 are arranged in the recesses 13.
  • the mechanical part 3 to be cooled is placed on the disk-like element 28, which is placed beforehand above the free surface 80 so that its axis coincides with the main axis 4.
  • the disk-like element 28 By actuating the fluid-operated cylinder 29, the disk-like element 28 is lowered, allowing the gradual immersion of the mechanical part 3 in the treatment liquid, and during the immersion the main shaft 27, and thus the mechanical part 3, can be rotated about the main axis 4 in the same direction of rotation as the treatment liquid, or in the opposite direction, depending on the mechanical characteristics required for the article to be tempered.
  • Immersion of the mechanical part 3 can be complete or it can be stopped so as to immerse specific regions of the mechanical part 3 that must be cooled faster than other regions.
  • the mechanical part 3 is constituted by a railroad wheel arranged with its lateral rim on the side opposite to its side resting on the disk-like element 28, as shown, immersion can be stopped before the lateral rim is immersed, so as to cool rapidly only the wheel tread.
  • the waiting time of the mechanical part 3 before immersion is parameters that can be managed with extreme precision by the control and monitoring element 58 according to preset programs.
  • the tank 2 is not filled with the treatment liquid but the mechanical part 3 is placed on the disk-like element 28, arranged in the tank 2 and turned about the main axis 4 in a manner similar to what has already been described with reference to cooling by immersion.
  • the position of the first nozzles 37 and the second nozzles 50 is adapted to the dimensions of the mechanical part 3.
  • the first nozzles 37 and the second nozzles 50 are thus supplied with the treatment fluid, which is propelled onto the mechanical part 3, cooling it.
  • the waiting time of the mechanical part 3 before the actuation of the first nozzles 37 and optionally of the second nozzles 50, the rotation rate of the mechanical part 3 about the main axis 4, the temperature, the pressure, the flow-rate and the quality of the treatment fluid supplied to the nozzles 37 and 50, the number of box-like bodies 38 and thus of the first nozzles 37 that are supplied, as well as the total treatment time, are parameters that can be managed with extreme precision by the control and monitoring element 58 according to preset programs.
  • the treatment fluid dispensed through the filler nozzles 11 can be in gaseous form and can be constituted, for example, by compressed air optionally with the addition of specific polymers.
  • the machine according to the invention in the particular application for performing the hardening of railroad wheels and/or similar products such as wheel rims and wheel hubs for railroad vehicles, can perform different hardening types, including:
  • the machine according to the invention by being able to manage the treatment parameters according to preset programs, ensures high precision in the repetitiveness of the treatments, achieving high and uniform quality standards.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Articles (AREA)
EP10155890.6A 2010-03-09 2010-03-09 Maschine zur Durchführung der Wärmebehandlung von mechanischen Teilen in Form von Festkörpern in Rotation, insbesondere zum Härten von Schienenrädern oder dergleichen Active EP2366806B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10155890.6A EP2366806B1 (de) 2010-03-09 2010-03-09 Maschine zur Durchführung der Wärmebehandlung von mechanischen Teilen in Form von Festkörpern in Rotation, insbesondere zum Härten von Schienenrädern oder dergleichen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10155890.6A EP2366806B1 (de) 2010-03-09 2010-03-09 Maschine zur Durchführung der Wärmebehandlung von mechanischen Teilen in Form von Festkörpern in Rotation, insbesondere zum Härten von Schienenrädern oder dergleichen

Publications (2)

Publication Number Publication Date
EP2366806A1 true EP2366806A1 (de) 2011-09-21
EP2366806B1 EP2366806B1 (de) 2015-06-17

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EP10155890.6A Active EP2366806B1 (de) 2010-03-09 2010-03-09 Maschine zur Durchführung der Wärmebehandlung von mechanischen Teilen in Form von Festkörpern in Rotation, insbesondere zum Härten von Schienenrädern oder dergleichen

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014201097A1 (en) * 2013-06-12 2014-12-18 Firth Rixson Limited Cooling systems for heat-treated parts and methods of use

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282322A (en) 1938-11-10 1942-05-12 Ohio Crankshaft Co Apparatus for electric heating
US6030471A (en) 1998-11-30 2000-02-29 Mhe Technologies, Inc. Method for producing a hardened wheel
EP1215291A1 (de) 2000-12-15 2002-06-19 Bochumer Verein Verkehrstechnik GmbH Verfahren zum Abkühlen und Behandeln erhitzter, rotationssymmetrischer Körper aus metallischen Werkstoffen wie Stahl bzw. Stahllegierungen und Vorrichtung zum Durchführen des Verfahrens
EP1772558A1 (de) 2005-10-07 2007-04-11 HEESS GmbH & Co. KG Vorrichtung zur gezielten Wärmebehandlung von Eisenbahn-Schienenrädern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282322A (en) 1938-11-10 1942-05-12 Ohio Crankshaft Co Apparatus for electric heating
US6030471A (en) 1998-11-30 2000-02-29 Mhe Technologies, Inc. Method for producing a hardened wheel
EP1215291A1 (de) 2000-12-15 2002-06-19 Bochumer Verein Verkehrstechnik GmbH Verfahren zum Abkühlen und Behandeln erhitzter, rotationssymmetrischer Körper aus metallischen Werkstoffen wie Stahl bzw. Stahllegierungen und Vorrichtung zum Durchführen des Verfahrens
EP1772558A1 (de) 2005-10-07 2007-04-11 HEESS GmbH & Co. KG Vorrichtung zur gezielten Wärmebehandlung von Eisenbahn-Schienenrädern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014201097A1 (en) * 2013-06-12 2014-12-18 Firth Rixson Limited Cooling systems for heat-treated parts and methods of use

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EP2366806B1 (de) 2015-06-17

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