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WO2025180740A1 - Procédé et dispositif de traitement d'une roue pour un véhicule ferroviaire - Google Patents

Procédé et dispositif de traitement d'une roue pour un véhicule ferroviaire

Info

Publication number
WO2025180740A1
WO2025180740A1 PCT/EP2025/052066 EP2025052066W WO2025180740A1 WO 2025180740 A1 WO2025180740 A1 WO 2025180740A1 EP 2025052066 W EP2025052066 W EP 2025052066W WO 2025180740 A1 WO2025180740 A1 WO 2025180740A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel
heat source
track
circumferential direction
laser
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.)
Pending
Application number
PCT/EP2025/052066
Other languages
German (de)
English (en)
Inventor
Johannes KRASA
Salvatore PFENNICH
Martin Rieger
Karl Zöscher
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.)
Siemens Mobility Austria GmbH
Original Assignee
Siemens Mobility Austria GmbH
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 Siemens Mobility Austria GmbH filed Critical Siemens Mobility Austria GmbH
Publication of WO2025180740A1 publication Critical patent/WO2025180740A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/02—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body integral with rim
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
    • B60B3/12—Means of reinforcing disc bodies
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • C21D1/34—Methods of heating
    • 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
    • C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails

Definitions

  • the invention relates to a method for machining a wheel for a rail vehicle, wherein a surface of a wheel rim of the wheel is machined by means of at least one heat source, wherein the wheel and the at least one heat source are mounted so as to be movable relative to one another and the at least one heat source is arranged at a distance from the wheel, wherein a relative movement is initiated between the wheel and the at least one heat source, wherein thermal energy is introduced into the wheel via the surface by means of at least one first beam emitted by the at least one heat source, and wherein a circumference of the wheel is completely swept over at least once by means of the at least first beam or a plurality of beams.
  • Wheels of rail vehicles are often subject to high operational loads, which lead to high stresses on the wheels in small contact areas between the wheels and rails. These stresses can lead to abrasion of wheel material and consequently to defects in the contact areas.
  • a wheel mileage is reached and/or a wheel wear limit is exceeded, the wheels are often reprofiled.
  • the wheel tread profiles are regenerated, for example, through a defined material removal process (e.g., by turning on an underfloor lathe).
  • the wheels often have wear reserves between the wheel running circle diameter and the wheel's operating limits. When these operating limits are reached, a wheel or wheel set replacement is usually carried out.
  • WO 2022/083907 A1 is known from the prior art, which describes a laser hardening method for a railway wheel.
  • a laser beam projects a laser spot onto a surface of the railway wheel to be machined, wherein the railway wheel is rotated about its axis of rotation and the laser beam is modulated.
  • This creates a laser track on the surface which can have a narrow line shape, wherein lines of this line-shaped laser track can be aligned obliquely to the axis of rotation.
  • EP 0116 359 A2 shows a wheel for a rail vehicle in which a running surface of the wheel and/or a section of a wheel flange is/are laser hardened.
  • the invention is based on the object of specifying a method with which high-quality mechanical properties of a wheel can be achieved and which is also easy to carry out.
  • this object is achieved by a method according to claim 1, in which at least one first track is formed on the surface in the circumferential direction of the wheel by means of the at least first beam, wherein an angular position of the at least first track with respect to the circumferential direction of the wheel and a rotational axis of the wheel is varied in sections and/or gradually.
  • the first track in the circumferential direction of the 202323682 Wheel can have a zigzag shape or a serpentine shape, etc.
  • a gradual variation of the angular position can be achieved, for example, with an arc-shaped first track.
  • a sequence of annular track elements can be projected onto the surface using the first beam. It is also possible to scan areas of the surface multiple times at short time intervals using the first beam, etc.
  • the surface is temporarily swept by the first beam in a positive circumferential direction and temporarily in a negative circumferential direction, etc.
  • the relative movement between the wheel and the heat source can be initiated, for example, by rotating the wheel about its axis of rotation and sweeping the circumference of the wheel using the first beam during rotation of the wheel.
  • the wheel can be rotatably mounted for this purpose.
  • the surface machined by the method can, for example, be a wheel tread and a wheel flange, or a section of the wheel flange facing the tread, exclusively the tread, or exclusively the wheel flange, etc.
  • a laser source emitting laser beams can act as the heat source, for example.
  • the heat source can be an electron beam welding system emitting electron beams, etc.
  • the first beam can be emitted as a single beam by means of the heat source, but a plurality of beams can also be emitted, etc.
  • the first track can be formed as a single track, but a plurality of tracks (e.g., offset from one another) can also be formed, etc. 202323682 Both direct or immediate irradiation of the surface by means of the first beam or the plurality of beams and indirect or mediate irradiation of the surface by means of the first beam or the plurality of beams (e.g.
  • the wheel by reflection of the first beam or the plurality of beams on a mirror when the first beam is embodied as a laser beam or the plurality of beams as laser beams, etc.) are possible.
  • the wheel is hardened and then tempered, whereby a hardening of the wheel can be achieved, etc.
  • defined material properties can be set in the region of the surface. For example, an adjustment of structural properties and/or a hardness profile, etc. in the region of the surface is conceivable. Further advantageous embodiments of the method according to the invention arise from the subclaims.
  • the at least first track is curved with respect to the circumferential direction of the wheel and the rotational axis of the wheel.
  • the at least first track comprises at least one first track element, by means of which a first surface section of the surface is completely enclosed. It may also be helpful if a first section of the at least first track and a second section of the at least first track are arranged adjacent to one another, wherein a 202323682 The angular position difference between the first section and the second section is less than 90°. This measure can be used, for example, to form V-shaped track elements.
  • a uniform hardness distribution in the area of the surface is achieved when a first section of the at least first track has an absolute angular value of greater than 60° with respect to the rotation axis of the wheel. Such an angular adjustment of the first track enables the finished wheel to roll on a rail with low vibration.
  • a strong and concentrated thermal energy input into the wheel is made possible when the at least one heat source is a laser source, the at least first beam is a laser beam, and the at least first track is a laser track. It can also be advantageous if the at least first beam emitted by the at least one heat source is reflected onto the surface via a movable scanning mirror.
  • This measure achieves a variable orientation of a reflection of the first beam, whereby, for example, a movable mounting of the heat source and an actuator for moving the heat source can be dispensed with.
  • a movable mounting of the heat source and an actuator for moving the heat source can be dispensed with.
  • High hardness values in the surface area and a required toughness of the wheel can be achieved if the surface is hardened to a 202323682 Hardening temperature greater than an austenitizing temperature of a material of the wheel, the wheel is cooled after the hardening step by means of a first cooling step, the surface is heated to a tempering temperature of at least 600 °C after the first cooling step by means of a tempering step and the wheel is cooled after the tempering step by means of a second cooling step.
  • a high hardness of the wheel is set in the area of the surface.
  • the tempering step the toughness of the wheel is increased.
  • the hardening step, the first cooling step, the tempering step and the second cooling step effect a hardening and tempering of the wheel.
  • a preferred solution is obtained if a power curve of the at least one heat source is set depending on a curve of the at least first track transverse to the circumferential direction of the wheel.
  • a varying power consumption of the wheel due to variable material thickness and contour curves of the wheel can be compensated.
  • a temperature distribution in the wheel can be determined using a thermal camera. The determined temperature distribution can be used to regulate the power of the heat source, etc.
  • the power profile of the at least one heat source is adjusted exclusively depending on the profile of the at least first track transverse to the circumferential direction of the wheel.
  • a power profile can be defined for the heat source, which is used to form each track element in the circumferential direction, etc.
  • Overlapping machining of the wheel is enabled if the at least first beam or the plurality of 202323682 blasting, the wheel's circumference is completely swept more than once. It is also possible, for example, for the first beam to sweep over certain surface sections multiple times during a complete sweep of the circumference, etc. Surface oxidation is avoided if the heat energy is introduced into the wheel in a protective gas or in a vacuum.
  • a promising implementation of the method according to the invention can be expected with a device having means configured for carrying out the method according to the invention, wherein the means are configured for machining a surface of a wheel rim of a wheel for a rail vehicle using at least one heat source, wherein the means comprise the at least one heat source, wherein the means are configured to mount the at least one heat source and the wheel so as to be movable relative to one another and spaced apart from one another, wherein the means comprise a first mounting device for the wheel and a second mounting device by means of which the at least one heat source is mounted, wherein the means are configured to initiate a relative movement between the wheel and the at least one heat source, to introduce heat energy into the wheel via the surface by means of at least one first beam emitted by the at least one heat source, to completely sweep a circumference of the wheel at least once by means of the at least first beam or a plurality of beams, to form at least one first track on the surface in the circumferential direction of the wheel by means of the at least first beam,
  • the device can be arranged, for example, in a depot or in a maintenance or repair facility for rail vehicles (e.g., in a maintenance pit beneath a rail vehicle, etc.).
  • the method according to the invention can be applied to wheels of a rail vehicle during maintenance or repair work on a rail vehicle. This can increase the wear resistance of the wheels and extend the service life of the wheels.
  • the wheel can be mounted, for example, so as to be rotatable about its axis of rotation.
  • the heat source can be mounted, for example, immovably or pivotably, etc.
  • the heat source can be, for example, a laser beam emitting laser source or an electron beam emitting electron beam welding system, etc.
  • An advantageous embodiment of the device is obtained if the at least one heat source is designed as a laser source, the at least first beam is a laser beam and the at least first track is a laser track, wherein the means comprise a movable scanning mirror assigned to the at least one heat source for reflecting the at least first beam onto the surface. This measure enables a strong and concentrated input of thermal energy into the wheel.
  • the scanning mirror ensures variable deflection of the beam.
  • Fig. 1 A flow chart for an exemplary first embodiment of a method according to the invention for machining a wheel for a rail vehicle, Fig.
  • FIG. 2 A side view of a section of a wheel for a rail vehicle machined by means of the exemplary first embodiment of a method according to the invention, wherein a laser track is formed as a sequence of elliptical laser track elements by means of the first embodiment of a method according to the invention
  • Fig. 3 A side view of a section of a wheel for a rail vehicle machined by means of an exemplary second embodiment of a method according to the invention, wherein laser tracks formed by means of the second embodiment of a method according to the invention have zigzag shapes
  • Fig. 4 An exemplary embodiment of an apparatus according to the invention for machining a wheel for a rail vehicle in a schematic representation. 202323682 Fig.
  • FIG. 1 shows a flow chart for an exemplary first embodiment of a method according to the invention for machining a wheel 1 for a rail vehicle.
  • the wheel 1 is shown as an example in Fig. 2 and Fig. 4.
  • a surface 3 of a wheel rim 4 of the wheel 1 is machined by means of a heat source 2 shown as an example in Fig. 4, wherein the surface 3 to be machined comprises a running surface 5 of the wheel 1 and a part of a wheel flange 6 of the wheel 1 assigned to the running surface 5.
  • the wheel 1 and the heat source 2 are mounted so as to be movable relative to one another and spaced from one another.
  • the wheel 1 is mounted so as to be rotatable about a rotation axis 7 of the wheel 1.
  • a relative movement between the wheel 1 and the heat source 2 is initiated, wherein the wheel 1 is set in rotation by means of a speed-adjustable electric motor 13, shown by way of example in Fig. 4, and the heat source 2 maintains its position.
  • the first method step 8 is followed by a second method step 9, a third method step 10, a fourth method step 11 and a fifth method step 12.
  • heat energy is introduced into the wheel 1 by means of a first beam 14 emitted by the heat source 2, shown by way of example in Fig.
  • the second method step 9 is a hardening step, in which the surface 3 is heated by means of the first beam 14 to a hardening temperature greater than an austenitizing temperature of a material of the wheel 1.
  • the wheel 1 is cooled by means of the third method step 10, which is a first cooling step.
  • the fourth method step 11 is a tempering step, in which the surface 3 is heated after the third method step 10 by means of the further beam to a tempering temperature of 650 °C.
  • the wheel 1 is cooled again by means of the fifth method step 12, which is a second cooling step. This results in a hardening of the wheel 1 in the area of the surface 3.
  • a first hardness of the wheel 1 is therefore approximately 380 HV5 on the surface 3, and a second hardness at a depth of 2 mm below the surface 3 is approximately 310 HV5.
  • the fourth method step 11 is carried out with a first minimum power of the heat source 2 of 8 kW, and the second method step 9 with a second minimum power of the heat source 2 of greater than 8 kW.
  • the feed rate of the first beam 14 and the further beam on the surface 3 is on average 150 mm/min. The feed rate can be varied by means of speed control of the electric motor 13.
  • the power of the heat source 2 is determined by setting a power curve of the heat source 2 depending on the curves of the first track 15 and the further track transverse to a circumferential direction 17 of the wheel 1, as shown by way of example in 202323682 Fig. 2 is shown, varies during the second method step 9 and during the fourth method step 11.
  • a first power control step 18 is carried out, during the fourth method step 11 a second power control step 19.
  • a temperature distribution in the wheel 1 is determined by means of a thermal camera 20, as described by way of example in connection with Fig. 4. The determined temperature distribution is used to control the power of the heat source 2. If a surface temperature of the surface 3 locally exceeds a defined temperature limit value, the power of the heat source 2 is temporarily reduced.
  • the aim of the power control is to keep the surface temperature within a defined temperature range with a uniform temperature distribution.
  • the power of the heat source 2 is increased or reduced as required.
  • the power curve of the heat source 2 is adjusted exclusively as a function of the course of the first track 15 transverse to the circumferential direction 17 of the wheel 1.
  • the power curve can, for example, be adjusted independently of a feed rate of the first beam 14 in the circumferential direction 17 of the wheel 1.
  • the thermal energy is introduced into the wheel 1 in an argon protective gas.
  • the protective gas is applied by means of a protective gas nozzle 21, as shown by way of example in Fig. 4, during the second method step 9 and the third method step 10 by means of a first application step 22 and during the fourth method step 11 and the fifth method step 12 202323682 is applied to the surface 3 by means of a second application step 23.
  • the thermal energy is introduced into the wheel 1 in a vacuum.
  • the heat source 2 and the wheel 1 can be arranged in an evacuable chamber 24, as shown by way of example in Fig. 4.
  • the first track 15 is formed on the surface 3 in the circumferential direction 17 of the wheel 1 during the second method step 9, and by means of the further beam, the further track is formed on the surface 3 in the circumferential direction 17 of the wheel 1 during the fourth method step 11.
  • the further track continues the first track 15.
  • the angular positions of the first track 15 and the further track with respect to the circumferential direction 17 of the wheel 1 and the rotation axis 7 of the wheel 1 are gradually varied.
  • Fig. 2 shows, by way of example, the first track 15 formed in this way as a sequence of elliptical track elements. According to the invention, it is also conceivable that, for example, an angular position of the first track 15 is varied in sections.
  • the first track 15 can have a zigzag shape, as shown by way of example in Fig. 3.
  • the heat source 2 is a laser source
  • the first beam 14 and the further beam are laser beams
  • the first track 15 and the further track are laser tracks.
  • the first beam 14 emitted by the heat source 2 and the further beam emitted by the heat source 2 are reflected onto the surface 3 via a movable scanning mirror 25, as shown by way of example in Fig. 4, thereby enabling a variation of the angular positions of the first track 15 and the further track.
  • the heat energy is thus introduced indirectly into the wheel 1 by means of the first beam 14 and the further beam, whereby by means of the first beam 14 and the further beam 202323682 the circumference of the wheel 1 is indirectly swept and the first track 15 and the further track are indirectly formed by means of the first beam 14 and the further beam.
  • the heat source 2 it is also possible for the heat source 2 to be pivotally mounted, for example, and for the first beam 14 and the further beam to be projected directly onto the surface 3 (e.g. without reflection via the scanning mirror 25).
  • the heat source 2 it is further conceivable for the heat source 2 to be, for example, an electron beam emitting electron beam welding system, etc. Fig.
  • FIG. 2 shows a side view of a section of a wheel 1 for a rail vehicle machined by means of the exemplary first embodiment of a method according to the invention described in Fig. 1.
  • a first track 15 is formed as a sequence of elliptical track elements by means of the method according to Fig. 1.
  • the first track 15 is curved with respect to the circumferential direction 17 of the wheel 1 and a rotational axis 7 of the wheel 1, thus having an angular position that varies gradually with respect to the circumferential direction 17 and the rotational axis 7.
  • the first track 15 comprises a first track element 26 and further track elements, which are only partially shown in Fig. 2.
  • a first surface section 27 of a surface 3 of a wheel rim 4 of the wheel 1 is completely enclosed by the first track element 26, and further surface sections of the surface 3 are completely enclosed by the further track elements.
  • the first track 15 is formed on a running surface 5 of the wheel rim 4 and on a part of a wheel flange 6 of the wheel rim 4 facing the running surface 5.
  • the surface 3 to be machined comprises the running surface 5 and that part of the wheel flange 6 facing the running surface 5.
  • FIG. 3 shows a side view of a section of a wheel 1 for a rail vehicle machined by means of an exemplary second embodiment of a method according to the invention.
  • the exemplary second embodiment of a method according to the invention is similar to the exemplary first embodiment of a method according to the invention, which is described in connection with Fig. 1.
  • a first track 15 and a second track 16 are formed in the circumferential direction 17 of the wheel 1 by means of a laser source and laser beams on a surface 3 of a wheel rim 4 of the wheel 1, which have angular positions that vary in sections with respect to the circumferential direction 17 of the wheel 1 and a rotation axis 7 of the wheel 1.
  • the surface 3 of the wheel rim 4, on which the first track 15 and the second track 16 are formed, comprises a running surface 5 of the wheel rim 4 and a part of a wheel flange 6 of the wheel rim 4 facing the running surface 5.
  • the first track 15 and the second track 16 have zigzag shapes, wherein a first section 28 of the first track 15 and a second section 29 of the first track 15 as well as further sections of the first track 15 and the second track 16 202323682 are arranged adjacent to one another and angular position differences between the first section 28 and the second section 29 as well as between the further sections amount to 50°.
  • the first section 28, the second section 29 and the further sections of the first track 15 and the second track 16 have absolute angular values of 65° with respect to the axis of rotation 7 of the wheel 1.
  • further tracks (not shown in Fig. 3) are formed, which are designed like the first track 15 and the second track 16.
  • FIG. 4 shows a schematic representation of an exemplary embodiment of a device according to the invention for machining a wheel 1 for a rail vehicle.
  • the device can be used to carry out the exemplary first embodiment of a method according to the invention according to Fig. 1 as well as the exemplary second embodiment of a method according to the invention described in connection with Fig. 3.
  • the device can be used to form the laser tracks described in connection with Fig. 2 and Fig. 3.
  • the device has means configured to carry out such methods.
  • the means are configured to machine a surface 3 of a wheel rim 4 of a wheel 1 for a rail vehicle using a heat source 2, wherein the means comprise the heat source 2.
  • the means are further configured to mount the heat source 2 and the wheel 1 so as to be movable relative to one another and spaced apart from one another, wherein the means comprise a first mounting device 30 for the wheel 1 and a second mounting device 31, by means of which the heat source 2 is mounted.
  • the wheel 1 is rotatably mounted about a rotational axis 7 of the wheel 1 via the first bearing device 30.
  • the first bearing device 30 is coupled to a speed-adjustable electric motor 13, by which the wheel 1 can be set in rotation.
  • the heat source 2 is pivotally mounted via the second bearing device 31.
  • the means are further configured to initiate a relative movement between the wheel 1 and the heat source 2, wherein the wheel 1 is set in rotation by means of the electric motor 13.
  • the means are configured to introduce heat energy into the wheel 1 via the surface 3 by means of a first beam 14 emitted by the heat source 2 or a plurality of beams, to completely sweep a circumference of the wheel 1 once or several times by means of the first beam 14 or the plurality of beams, to form a first track 15, as shown for example in Fig. 2, or a plurality of tracks, as shown for example in Fig. 3, on the surface 3 in the circumferential direction 17 of the wheel 1 by means of the first beam 14 or the plurality of beams, and to vary an angular position of the first track 15 or angular positions of the plurality of tracks with respect to the circumferential direction 17 of the wheel 1 and the rotation axis 7 of the wheel 1 in sections and/or gradually.
  • the heat source 2 is designed as a laser source, the first beam 14 is a laser beam, and the first track 15 is a laser track.
  • the means comprise a movable scanning mirror 25 associated with the heat source 2 for reflecting the first beam 14 onto the surface 3.
  • the first beam 14 emitted by the heat source 2 is thus deflectable and is projected indirectly onto the surface 3 via the scanning mirror 25.
  • the scanning mirror 25 is mounted for rotation about two mutually perpendicular axes.
  • the means further comprise a thermal camera 20, which is directed at the surface 3 to be treated and is mounted so as to be pivotable and displaceable.
  • the thermal camera 20 is connected to the heat source 2 and the electric motor 13 for controlling the heat source 2 and the electric motor 13.
  • the thermal camera 20 which is designed as an infrared camera, a temperature distribution in the area of the surface 3 is determined. If the temperature distribution is uneven, for example, the power of the heat source 2 and/or, via a speed control of the electric motor 13, a speed of the wheel 1 can be adjusted in order to achieve a balanced temperature distribution in the area of the surface 3.
  • the means further comprise a protective gas nozzle 21, which is mounted so as to be pivotable and displaceable and via which a protective gas can be applied to the surface 3 to prevent oxidation.
  • the means further comprise a hermetically sealed chamber 24 in which the wheel 1, the electric motor 13, the heat source 2, the scanning mirror 25, the thermal camera 20, the shielding gas nozzle 21, as well as the first bearing device 30 and the second bearing device 31 are arranged.
  • the chamber 24 can be evacuated to form a vacuum to prevent oxidation effects on the surface 3. According to the invention, it is also conceivable, for example, to dispense with the scanning mirror 25 and to project the first beam 14 directly onto the surface 3. According to the invention, it is also possible for the heat source 2 to be designed as an electron beam-emitting electron beam welding system, etc.
  • Second bearing device 202323682 List of designations 1 Wheel 2 Heat source 3 Surface 4 Wheel rim 5 Tread 6 Wheel flange 7 Rotation axis 8 First process step 9 Second process step 10 Third process step 11 Fourth process step 12 Fifth process step 13 Electric motor 14 First beam 15 First track 16 Second track 17 Circumferential direction 18 First power control step 19 Second power control step 20 Thermal camera 21 Shielding gas nozzle 22 First application step 23 Second application step 24 Chamber 25 Scanning mirror 26 First track element 27 First surface section 28 First section 29 Second section 30 First bearing device 31 Second bearing device

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne un procédé de traitement d'une roue (1), une surface (3) d'une jante de roue (4) étant traitée au moyen d'au moins une source de chaleur (2), la roue (1) et la source de chaleur (2) étant mobiles l'une par rapport à l'autre et espacées l'une de l'autre, un mouvement relatif entre la roue (1) et la source de chaleur (2) étant initié et de l'énergie thermique étant introduite dans la roue (1) au moyen d'au moins un premier faisceau (14) émis par la source de chaleur (2), une circonférence de la roue (1) étant complètement balayée au moins une fois. Selon l'invention, au moins une première piste (15) est formée, au moyen du premier faisceau (14) sur la surface (3) dans le sens circonférentiel (17) de la roue (1), la position angulaire de ladite piste par rapport au sens circonférentiel (17) et un axe de rotation (7) de la roue (1) variant par sections et/ou progressivement. Il en résulte un traitement thermique efficace et performant.
PCT/EP2025/052066 2024-02-29 2025-01-28 Procédé et dispositif de traitement d'une roue pour un véhicule ferroviaire Pending WO2025180740A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50176/2024A AT527420B1 (de) 2024-02-29 2024-02-29 Verfahren und Vorrichtung zur Bearbeitung eines Rads für ein Schienenfahrzeug
ATA50176/2024 2024-02-29

Publications (1)

Publication Number Publication Date
WO2025180740A1 true WO2025180740A1 (fr) 2025-09-04

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Application Number Title Priority Date Filing Date
PCT/EP2025/052066 Pending WO2025180740A1 (fr) 2024-02-29 2025-01-28 Procédé et dispositif de traitement d'une roue pour un véhicule ferroviaire

Country Status (2)

Country Link
AT (1) AT527420B1 (fr)
WO (1) WO2025180740A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0116359A2 (fr) 1983-02-09 1984-08-22 Asea Ab Roue de véhicule ferroviaire
WO1995009736A1 (fr) * 1993-10-05 1995-04-13 Olofsson Johan Lennart Parties superficielles traitees pour roues de vehicules sur rail et procede de traitement associe
CN2487620Y (zh) * 2001-04-23 2002-04-24 张准胜 一种激光强化的铁道车辆车轮
WO2005080686A1 (fr) * 2004-02-23 2005-09-01 Sandro Favilli Durcissement laser d'equipements ferroviaires, et materiel a cet effet
WO2022083907A1 (fr) 2020-10-23 2022-04-28 Johann Fimbinger Procédé de durcissement par laser d'une surface cylindrique d'une pièce

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD267740A1 (de) * 1987-12-10 1989-05-10 Deutsche Reichsbahn Verfahren zum verschleissfestmachen von metallraedern
US7057134B2 (en) * 2003-03-18 2006-06-06 Loma Linda University Medical Center Laser manipulation system for controllably moving a laser head for irradiation and removal of material from a surface of a structure
DE10337962B4 (de) * 2003-08-19 2012-04-26 Mahle Gmbh Verfahren zum Härten der Nutflächen, insbesondere der Nutflanken der Ringnuten eines Stahlkolbens

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0116359A2 (fr) 1983-02-09 1984-08-22 Asea Ab Roue de véhicule ferroviaire
WO1995009736A1 (fr) * 1993-10-05 1995-04-13 Olofsson Johan Lennart Parties superficielles traitees pour roues de vehicules sur rail et procede de traitement associe
CN2487620Y (zh) * 2001-04-23 2002-04-24 张准胜 一种激光强化的铁道车辆车轮
WO2005080686A1 (fr) * 2004-02-23 2005-09-01 Sandro Favilli Durcissement laser d'equipements ferroviaires, et materiel a cet effet
WO2022083907A1 (fr) 2020-10-23 2022-04-28 Johann Fimbinger Procédé de durcissement par laser d'une surface cylindrique d'une pièce

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AT527420A4 (de) 2025-02-15
AT527420B1 (de) 2025-02-15

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