US20240084520A1 - Device and method for grinding a profile - Google Patents

Device and method for grinding a profile Download PDF

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Publication number
US20240084520A1
US20240084520A1 US18/257,966 US202118257966A US2024084520A1 US 20240084520 A1 US20240084520 A1 US 20240084520A1 US 202118257966 A US202118257966 A US 202118257966A US 2024084520 A1 US2024084520 A1 US 2024084520A1
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United States
Prior art keywords
profile
grinding
grinding body
relative
axis
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US18/257,966
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English (en)
Inventor
Frank Mevert
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Schweerbau International & Co KG GmbH
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Schweerbau International & Co KG GmbH
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Assigned to SCHWEERBAU INTERNATIONAL GMBH & CO. KG reassignment SCHWEERBAU INTERNATIONAL GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MEVERT, FRANK
Publication of US20240084520A1 publication Critical patent/US20240084520A1/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
    • E01B31/02—Working rail or other metal track components on the spot
    • E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
    • E01B31/17—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/004—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding rails, T, I, H or other similar profiles
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/01—Devices for working the railway-superstructure with track
    • E01B2203/012—Devices for working the railway-superstructure with track present, i.e. in its normal position

Definitions

  • Embodiments of the present invention relate to a mobile device which is designed as a rail-bound vehicle for grinding a profile. Embodiments of the present invention further relate to a method for grinding the profile.
  • DE 69 201 811 T2 has already disclosed a mobile device which is designed as a rail-bound vehicle and which has a plurality of grinding wheels for grinding a rail track with a convex running surface and a defining side surface.
  • the device is movable in the feed direction along the rail track, while the grinding wheels can be driven at the same time in a rotationally movable manner about an axis of rotation.
  • the grinding wheels have in each case an inclined axis of rotation which does not intersect the rail profile, the grinding wheels being arranged on a frame of the rail-bound vehicle which is displaceable transversely to the rail track and being guided by means of rollers which bear against the rail track.
  • the frame serves to displace the support both in a transverse direction and perpendicular to the longitudinal axis of the rail.
  • the support has at least one support roller which is arranged in the immediate vicinity of the axis of the corresponding grinding wheel. These support rollers are applied against the inner face of the rail head.
  • DD 219 230 A5 describes a device for re-profiling a rail head, wherein the axis of rotation of the grinding wheel is inclined relative to the vertical and the horizontal plane.
  • the grinding wheel is guided vertically and laterally relative to the rail on a grinding frame by means of grinding shoes or rollers.
  • the grinding wheel has a planar grinding surface which is post-machined by a pin serving for dressing the grinding wheel during the grinding process.
  • the convex rail head is thus only partially machined, so that facets are generated thereby and the rail transverse profile is provided with a discontinuous path.
  • Inclined counter-rotating grinding wheels with offset axes which do not intersect the profile are disclosed in DE 26 12 173 A1, the grinding wheels being mounted on tool supports which are vertically and transversely displaceable by means of a tracking system assigned to each rail.
  • the grinding tools arranged on each rail side act on the rail head upper face with the same delivery movement, wherein the transverse displaceability of the two frame parts relative to one another results in a centering relative to each rail independently of one another.
  • a grinding device is disclosed in DE 32 27 343 A1 in which a tool support is arranged in a height-adjustable manner below a chassis for each of the rails, the tool support guiding a rotatable machining tool, in particular a cup grinding wheel, in a defined manner via lateral rollers which run on the profile, the axis of rotation of the machining tool intersecting the profile of the rail.
  • face milling profiling wheels are arranged on a chassis on a machining plate which is adjustable in terms of angle relative to the rail in the vertical and transverse direction as a compound slide in a linear manner and additionally about the longitudinal and vertical axis, wherein measuring sensors sliding on the rail supply the reference variable for the adjustment.
  • the tracking of the tool on the rail can take place, for example, by means of an articulated robot.
  • the device disclosed in U.S. Pat. No. 4,583,893 A comprises a support element which can be displaced in a linear manner relative to a rail and which comprises a contoured milling cutter.
  • a cutting depth reference guide for the tool bearing can be applied against the upper face of the running surface of the rail and a lateral cutting depth reference guide can be applied against the side surface.
  • the two cutting depth reference guides are rotatably mounted about a common shaft and are arranged in the feed direction in front of the milling cutter.
  • grinding devices having at least two cup wheels which are arranged one behind the other in the longitudinal direction of the rail head and which are applied against the running surface on the front face on opposing sides of the rail head, and which have a grinding profile corresponding to the running surface profile.
  • a method for machining railroad tracks in which a plurality of rotating grinding wheels is used, the grinding wheels being arranged adjacent to one another and one behind the other, wherein some of the grinding wheels are inclined according to the original profile of the rail heads. Only an approximation to the original profile of the rail heads can be achieved by such a grinding method.
  • EP 0 315 704 B1 has already described a grinding machine for re-profiling rail heads with a grinding head which can be adjusted by a lifting device, wherein the grinding heads can be lifted and lowered successively and offset to one another.
  • each grinding module is mounted with a frame so as to be at least approximately vertically adjustable and is mounted on the frame so as to be at least approximately horizontally adjustable with a chassis.
  • cup grinders are also known, the cup grinders being brought into engagement on the front face with the rail surface and preferably being set with a tilting angle relative to the rail surface to be ground.
  • a front surface of the grinding tool is also used for machining the rail but is contoured according to the rail geometry. This is made possible by the axis of rotation not running through the rail but with a lateral spacing thereto.
  • the grinding zone is thus not located in front of the axis of rotation in the direction of the feed movement but transversely between the axis of rotation and the rail.
  • a high rotational speed and/or high pressing force is set. In practice, this leads to flying sparks and thus to the risk of fire.
  • EP 2 525 933 B1 relates to a device for material-removing post-machining of the running surface of a rail head with a frame guided along the rail head.
  • the machining tools are configured as face milling cutters which can be driven so as to rotate in opposing directions, the axes of rotation thereof running in a common plane and the cutting regions thereof overlapping one another transversely to the longitudinal direction of the rail head.
  • a device for grinding a rail running surface with a grinding belt aligned parallel to the rail longitudinal axis is also disclosed in EP 0 444 242 A1, wherein a further belt which is configured as a pressure belt is arranged between the pressure rollers and the grinding belt.
  • sliding stones are also used for profile-grinding the heads of railroad tracks.
  • grinding trains are used, grinding stones being arranged on the underside thereof and being guided under pressure over the rail surfaces.
  • Grinding by sliding stones is based on an oscillating translatory movement of the grinding body along the rail during the movement of the vehicle.
  • a drawback of the grinding method using sliding stones is that after a short time the sliding stone is already adapted to the worn profile of the rail surface, so that while a removal of ripples and corrugations in the rail surface is achieved, it is not possible to restore the original profile of the rail head.
  • DE 21 32 220 A proposes to provide a grinding means support which can be fastened to the grinding train and which has individual guide channels which face toward the rail surface for a relatively coarse-grained grinding means with loose grit which is supplied through the channels under pressure to the rail surface and held there by the channel walls, wherein the lower defining edges of the guide channels have a spacing relative to the rail surface which is smaller than the grain size of the grinding means.
  • the arcuate cutting path of the individual cutting edges of the milling cutter caused by such peripheral milling leads to a surface of the rail head which is corrugated in the rail longitudinal direction, wherein the surface quality is impaired with an increasing feed rate due to the increasing distance between the material removal of successive cutting edges.
  • face milling cutters as disclosed in U.S. Pat. No. 4,583,893 A for example, the face milling cutters being arranged on one side of the rail head and being used with a complex guide which has a freely rotatably mounted guide wheel and a plurality of guide rollers on the opposing rail side.
  • WO 02/06587 A1 also describes a method for re-profiling at least the convex part of the rail head cross-sectional profile of a rail by peripheral milling, with more than five milling tracks adjacent to one another in the longitudinal direction of the rail.
  • EP 2 177 664 A1 proposes to move the cutting edge along a straight path during the material-removing machining of the workpiece.
  • Embodiments of the present invention provide a device configured as a rail-bound vehicle for grinding a profile with a running surface and a side surface defining the profile.
  • the device includes at least one profiled grinding body that is capable of being driven in a rotationally movable and/or oscillating manner about an axis of rotation.
  • the at least one grinding body is concave at least in some portions.
  • the axis of rotation is capable of being positioned so as to be inclined with an orientation relative to a vertical plane and/or relative to a horizontal plane.
  • the device further includes a support arranged on the device so as to be movable in a translational manner in a transverse plane relative to the profile and/or relative to a feed direction via a guide.
  • the at least one grinding body is arranged on the support.
  • the device further includes at least one contact element that is coupled to the support and is capable of being applied against the profile in a region of a contact surface of the profile.
  • the support with the grinding body is automatically aligned thereby in the transverse plane relative to the profile and relative to the device.
  • the axis of rotation of the at least one grinding body, with a transverse axis relative to a longitudinal axis of the profile spans a plane which intersects at least one contact surface of the at least one contact element on the profile.
  • FIG. 1 shows a cross section through a profile and a grinding body arranged inclined at an angle of 35° according to an embodiment
  • FIG. 2 shows a further view of the profile with a grinding body arranged inclined at an angle of 5° according to an embodiment
  • FIG. 3 shows a front view of a support of a device with the grinding body shown in FIG. 1 according to an embodiment
  • FIG. 4 shows a front view of the support with a grinding body arranged inclined at an angle of 5 according to an embodiment
  • FIG. 5 shows a front view of the support during the adjustment of the position and orientation according to an embodiment
  • FIG. 6 shows a side view of the support during the adjustment of the position and orientation according to an embodiment
  • FIG. 7 shows an enlarged cross section through the profile according to FIG. 1 according to an embodiment
  • FIG. 8 shows two grinding bodies with axes of rotation inclined toward one another in a front view according to an embodiment.
  • Embodiments of the present invention can improve substantially the removal capacity when grinding profiles, at the same time with high demands for the surface quality and the dimensional accuracy of the profile thus machined.
  • Embodiments of the present invention provide a device for grinding, in which the axis of rotation can be positioned to be inclined with an orientation relative to the vertical plane and/or relative to the horizontal plane, and the axis of rotation does not run through the profile, and in which the support is arranged in a transverse plane on the device, in particular, so as to be movable in a translatory manner relative to the transverse plane to the feed direction, and the support is kinematically coupled to at least one contact element which can be applied non-positively against the profile as lateral copying and/or vertical copying, by which the support with the grinding body is automatically aligned in the transverse plane relative to the profile and relative to the device.
  • the inventors recognized that it is possible to maintain small tolerances when machining the profiles by means of the mobile device designed as a rail-bound vehicle, by the support of the grinding body being movable both relative to the profile and relative to the mobile device and being automatically aligned during use of the device. At the same time, the working result is achieved irrespective of wear occurring on the grinding body, which thus does not have a negative effect on the quality of the surface machining.
  • the device is provided with a contact element, for example a sliding element, such as a slide, or an arrangement with at least one roller or a wheel.
  • a contact element for example a sliding element, such as a slide, or an arrangement with at least one roller or a wheel.
  • Such a forcibly guided lateral copying is preferably non-positively applied against the internal or medial side surface facing the respective other rail track.
  • the support bears at the same time a paired arrangement of a plurality of grinding bodies which are arranged in a common transverse plane of the device, such that the grinding bodies can be aligned together both relative to the parallel rail tracks and relative to one another.
  • a separate contact element is assigned to each grinding body, it is also possible to compensate for inaccuracies of the profile along its main extent or deviations from the ideal parallel alignment of the rail tracks.
  • the contact element is pretensioned with a predetermined, in particular adjustable, pretensioning force relative to the profile, in particular the rail track.
  • the grinding bodies are spread apart from one another at the same time, so that in particular no additional abutment is needed for receiving the bearing force.
  • a further contact element which can be designed as a roller is pretensioned from above against the running surface of the profile or the rail track, in order to achieve in this manner an automatic adaptation in the vertical direction.
  • the contact element can also have two bearing surfaces in order to permit the horizontal alignment relative to the side surface and the vertical alignment relative to the running surface at the same time with a single contact element.
  • the device thus equipped is independent of the movement of the rail-bound vehicle during operation, due to the vertical and horizontal guidance of the supports and the grinding bodies connected thereto, so that for the first time a working platform does not form the reference for the adjustment of the tools, as in the prior art, but directly the profile itself to be machined, which clearly leads to substantially fewer errors.
  • the machining quality can be further improved by an arrangement of the grinding bodies in a common transverse plane of the device or the cross-sectional plane of the profile with the contact element assigned thereto.
  • the position of the contact element as lateral copying is directly related to the center of rotation of the grinding body, which is designed in particular as a cup grinding wheel, so that no lateral offset occurs even in the case of cornering. Rather, the contour of the grinding body always remains in congruence with the profile.
  • the axis of rotation of the grinding body is oriented with a lateral or medial offset in the cross-sectional plane of the profile such that this axis of rotation does not intersect the profile.
  • a negative shape of the profile is formed in the grinding body by a setting angle and an eccentric position of the cup grinding wheel.
  • a contact surface which is of variable length in terms of its contact length is thus produced over the surface of the profile, which is distributed over the rail transverse profile. Due to this contact surface which is lengthened in the radius region of the profile, the grinding tool is automatically stabilized in the longitudinal direction which leads to an optimal flattening of the surface, in particular the residual corrugations of the profile.
  • a plurality of grinding bodies are arranged on one respective support one behind the other in the feed direction, wherein the axes of rotation of the grinding bodies are not aligned in parallel but inclined relative to one another.
  • Different setting angles of the grinding bodies generate different grinding regions on the surface of the profile.
  • the entire transverse profile can be ground with two grinding bodies one behind the other at different angles, by different grinding bodies being used for machining different surface portions (tracks) with different inclination angles running parallel to one another in the direction of the main extent of the profile.
  • the grinding bodies can be operated in synchronism or counter-rotating, so that the rotational direction of the grinding bodies is identical in the feed direction and counter to the feed direction.
  • a tangential removal stream is produced which always acts in the same direction irrespective of the direction of movement of the device by the rotating grinding body.
  • the rotational axes of the grinding bodies are not arranged parallel to the cross-sectional plane of the profile to be machined, but are oriented so as to be inclined in the feed direction or counter thereto, the larger surface component of the contact surface between the grinding body and the profile is located in front of or behind the plane of the axis of rotation. In this manner, a trailing or leading machining relative to the feed direction is implemented in a simple manner relative to a cross-sectional plane of the profile.
  • a trailing or following arrangement for hobbing or surface milling can also be implemented for smoothing the residual corrugations.
  • a combination of a plurality of grinding bodies can also be expediently used, at least one axis of rotation thereof passing through the profile and at least one further axis of rotation having a lateral offset to the profile, wherein this is not oriented in a cutting manner.
  • the grinding bodies bear relative to the profile in a force-dependent manner, in particular with an adjustable or limitable pressing force or pretensioning force.
  • the control of the pressing force or pretensioning force is carried out expediently by considering the relevant parameters of the profile and the surrounding conditions, wherein the detected torque of the grinding body and the feed rate of the device can also be included.
  • the support or the axis of rotation can be adjusted in a path-controlled manner.
  • the support is designed to be movable in a reversable translatory manner in a plane parallel to the main extent of the profile or the rail track. Since at least one of the grinding bodies, which is designed as a grinding wheel, is moved at the same time by a reversing translatory movement of the support provided with the grinding body in a plane parallel to the main extent of the rail track, during the rotating or oscillating movement to and fro along a specific circular path, the grinding means is repeatedly engaged in each rail portion.
  • the shape of the rail track to be machined is not determined by the geometry of the grinding body but by the setting angle thereof, so that it does not lead to a deviation in size in the context of a rotating or oscillating movement.
  • a combination of a plurality of grinding bodies known per se has already proved expedient here.
  • the axis of rotation of at least one grinding body encloses an acute angle with the longitudinal axis of the profile.
  • the reference shape of the grinding process to be generated is accordingly achieved by a plurality of grinding bodies, which together produce the desired profile.
  • the axes of rotation of different grinding bodies enclose an acute angle relative to one another.
  • the setting angle of at least one grinding body can be designed to be adjustable, wherein preferably the angle of inclination of the respective axis of rotation is also designed to be adjustable during the operation of the device.
  • the setting angle can also be selected according to the desired profile clearance, in order to be able to achieve optimal grinding results even under spatially restricted operating conditions.
  • the axis of rotation of the grinding body encloses an acute angle with the transverse plane of the rail track, a rapid transport of the material removed from the machining zone is achieved in a simple manner, so that the removed material cannot collect in the grinding gap.
  • the grinding body has a rotationally symmetrical shape.
  • a variant of the grinding body has at least in some portions a concave shape of the peripheral surface or the front surface, wherein the concave grinding surface is adapted to the geometry of the profile of the rail track.
  • the grinding body and/or the support has at least one electrical and/or hydraulic drive in order to provide the desired drive power and also to undertake a rapid change in the speed of the support or the grinding body by a deceleration or acceleration, and as a function of the respective operating conditions.
  • the drive can be arranged centrally on the device or decentrally on the support, wherein a plurality of grinding bodies can be supplied with the required drive power by a common drive.
  • a further embodiment of the invention which is also promising, is also achieved by the rotational or oscillating movement of the at least one grinding body, on the one hand, and the translatory movement of the support, on the other hand, taking place in a synchronized manner by a kinematic coupling.
  • the rotational or oscillating movement is adapted to the movement sequence of the support, which due to the reversing translatory movement is decelerated in a cyclical manner at the reversal points.
  • the change associated therewith in the relative movement of the grinding body relative to the rail track is compensated by the kinematic coupling.
  • a superimposition of a different drive power of the grinding body can thus also be implemented in a simple manner by a further drive power provided by means of the kinematic coupling.
  • a further drive power provided by means of the kinematic coupling.
  • toothed racks, connecting rods, coupling rods or the like can be used for the power transmission.
  • an additional speed component of the rotation or oscillation of the grinding wheel rotation is superimposed on the at least one grinding body, primarily in a direction of movement of the support opposing the direction of travel.
  • the lateral copying and the guide are pretensioned relative to the profile by a pretensioning force, while the grinding body, for example, can be lifted away on one side.
  • the drive power of the support is used as the sole drive power for the rotation of the grinding tool, by using the coupling.
  • the synchronized rotational or oscillating movement of the at least one grinding body, on the one hand, and the translatory movement of the support, on the other hand takes place by a hydraulic, pneumatic or electromechanical coupling.
  • the additional or sole drive power for the at least one grinding body is produced by the cyclical pressure increase or pressure reduction of the hydraulic or pneumatic pressure of the drive of the support, which is effective in the regions of the reversal points of the reversing movement.
  • the relative speed of the grinding body which is moved in a rotational or oscillating manner, and also translatory manner, by means of the support relative to the rail track can be kept constant within predetermined limit values.
  • a pressure accumulator can also be provided in order to be able to provide a drive power which is as uniform as possible.
  • Embodiments of the present invention provide a method for grinding a profile, in particular a rail track intended for rail-bound vehicles, in which at least one grinding body which is arranged on a support is driven in a rotationally movable or oscillating manner about an axis of rotation, in that during the rotational or oscillating movement of at least one grinding body, the support bearing the grinding body is driven at least temporarily in a reversing translatory manner for introducing a superimposed movement parallel to a longitudinal axis of the profile.
  • a repeated engagement of the grinding body takes place in each profile portion, in which the supports are moved to and fro in the longitudinal direction of the rail track, while the grinding body ensures the desired material removal by its rotational or oscillating movement.
  • the axis of rotation of the grinding body is arranged, in particular, so as to be inclined at an acute angle relative to the plane of the surface portion to be machined and/or to the cross-sectional plane of the rail track.
  • the axis of rotation is inclined such that the lateral axis portion is located in front of the medial axis portion relative to the rail track in the direction of travel.
  • the medial side denotes the side facing the adjacent rail track and the lateral side denotes the side facing away from the adjacent rail track.
  • the rotational speed can thus be reduced, whereby flying sparks are also significantly reduced during operation, while the relative speed can still be increased between the rail surface of the rail track and the grinding body.
  • the rotation is preferably controlled such that the rotational speed of the grinding body is increased in the region of the reversal points of the translatory reversing movement of the support.
  • the rotational speed of the rotating movement of the grinding body is adapted reciprocally to the translatory movement.
  • the translatory speed is added with the movement in the direction of travel and the translatory speed is subtracted with the movement counter to the direction of travel.
  • the absolute translatory speed of the grinding body is not zero in the region of the reversal points during operation. Rather, the speed of the support between the reversal points in the direction of travel is greater than counter to the direction of travel. To compensate, the rotational speed is further reduced in the direction of travel but increased counter to the direction of travel.
  • a practical development of the method according to embodiments of the invention is also achieved in that the rotational speed or the frequency of the rotating or oscillating movement of at least one grinding body in the region of the reversal points of the translatory reversing movement is changed, in particular is increased, relative to a region between the reversal points, in order to compensate for the deceleration of the translatory movement of the support correspondingly by an increase in the rotational or oscillating movement.
  • the change in the rotational speed or the frequency of the rotating or oscillating movement is adjusted in a reciprocal manner to the reversing translatory movement.
  • the rotational or oscillating movement of the at least one grinding body, on the one hand, and the translatory movement of the support, on the other hand can be introduced kinematically coupled together in order to keep the control effort low.
  • the support can also be connected to an energy storage device, for example a pressure vessel, which is filled in the region of the maximum speed of the support.
  • an energy storage device for example a pressure vessel, which is filled in the region of the maximum speed of the support.
  • the stored energy can be taken and used to increase the rotational speed or frequency of the grinding bodies.
  • the grinding body is brought into contact with the surface of the rail track with a grinding surface on the peripheral side or front face, in order to be able to machine a large portion of the rail head by a corresponding contouring of the grinding body, and to ensure a high machining accuracy.
  • An offset grinding method is preferably used in combination with milling.
  • the device 1 which is shown in this variant is designed specifically for machining rail tracks which run parallel, as profiles 2 to be ground.
  • FIG. 3 For better understanding, parallel rail tracks and the grinding bodies 4 which are assigned thereto and arranged mirror symmetrically and which are arranged together on the device 1 , are shown in FIG. 3 by way of indication, as is explained hereinafter in further detail.
  • the grinding bodies 4 are provided with a grinding surface 5 on the front face, with bonded grain and a geometrically undefined cutting edge.
  • different inclination angles ⁇ ; ⁇ between 5° and 90° of an axis of rotation 6 of the grinding bodies 4 can be provided relative to a central longitudinal plane 7 of the profile 2 .
  • the axis of rotation 6 is not only arranged inclined relative to the vertical and the horizontal but is additionally oriented eccentrically with an offset, such that the axis of rotation 6 of the grinding body 4 does not intersect the profile 2 .
  • a circular sector or a circular segment with a center angle of less than 180° is in contact with the profile 2 .
  • a concave grinding surface 5 of the grinding body 4 can be implemented in the radial direction relative to the axis of rotation 6 .
  • This concave shape 8 can be already introduced into the grinding body 4 in the production process, which in use is optimally adapted to the profile 2 , so that the occurring wear cannot lead to an undesired shape deviation.
  • the grinding surface 5 engages sufficiently far around the convex surface portion 9 between the running surface 3 and an inner side surface 10 , which defines the profile 2 medially, that it permits a machining quality regarding dimensional accuracy and shape accuracy which was previously unachievable.
  • Each of the grinding bodies 4 is arranged on a support 11 which, to compensate for wear, permits an axial delivery of the grinding body 4 parallel to the axis of rotation 6 relative to the profile 2 and also an adjustment of desired inclination angle ⁇ , ⁇ which is optimal for the respective conditions of use.
  • the support 11 in turn is movable by means of a guide 12 in a translatory manner relative thereto in a plane parallel to the cross-sectional plane of the profile 2 or in the transverse plane to the feed direction of the device 1 .
  • a guide 12 in a translatory manner relative thereto in a plane parallel to the cross-sectional plane of the profile 2 or in the transverse plane to the feed direction of the device 1 .
  • the control of this lateral medial movement or lateral movement of the supports 11 is achieved by the support 11 being connected to at least one contact element 13 , which can be applied non-positively against the profile 2 , the support 11 being automatically aligned thereby with the grinding body 4 in the transverse plane relative to the profile 2 and relative to the device 1 .
  • the contact element 13 which is provided as a slide with a sliding surface, can be applied against the side surface 10 of the profile 2 , while for detecting the height a further contact element 14 which is designed as a roller is supported from above against the running surface 3 so that the two contact elements 13 , 14 together form a reference for the alignment of the grinding body 4 , and the support 11 is automatically aligned relative to the profile 2 and relative to the device 1 due to an adjustable pretensioning force F in the transverse plane.
  • a plurality of, for example also different, grinding bodies 4 with differently inclined axes of rotation 6 can be arranged one behind the other on one respective support 11 in the feed direction of the device 1 , wherein the axes of rotation 6 of the grinding bodies 4 enclose an acute angle (p.
  • the grinding bodies 4 permit the machining of different surface portions 9 of the convex or planar surface as parallel tracks.
  • a superimposed reversing movement of the grinding body 4 which can be driven in a rotationally movable or oscillating manner about its axis of rotation 6 , with its grinding surface 5 can be implemented when grinding the profile 2 .
  • the support 11 of the grinding body 4 is designed to be movable in a reversing translatory manner for introducing a superimposed movement during the rotating or oscillating movement of the grinding body 4 parallel to the central longitudinal plane 7 of the profile 2 . Due to this translatory movement of the grinding body 4 superimposed on the rotational movement, the grinding body repeatedly reaches each surface portion of the profile 2 even when the vehicle bearing the device follows the path of the profile 2 at its own usual speed.
  • a rail portion is not only reached once by the grinding surface 5 of the grinding body 4 but can be passed over repeatedly thereby so that very good surface qualities can be produced.
  • the axes of rotation 6 which are inclined at the angle ⁇ to one another, ensure that the removed material is transported out of the grinding gap and cannot accumulate therein. Due to the efficient machining and the high level of material removed, the rotational speed can be reduced and flying sparks can also be reduced thereby, in addition to the wear, while at the same time the relative speed is increased between the surface of the profile 2 and the grinding body 4 .
  • the rotation preferably can also be controlled such that the rotational speed of the grinding body 4 is increased in the region of the reversal points of the reversing movement.
  • the rotational speed of the rotating movement is reciprocally adapted to the translatory movement. Since the translatory movement is also superimposed by the intrinsic movement of the vehicle along the profile 2 , the translatory speed is added with the movement in the direction of travel and the translatory speed is subtracted with the movement counter to the direction of travel, so that the rotational speed of the grinding body 4 is also adjusted as a function of the leading or trailing phase.
  • the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise.
  • the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
US18/257,966 2020-12-22 2021-11-23 Device and method for grinding a profile Pending US20240084520A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102020134657 2020-12-22
DE102020134657.3 2020-12-22
PCT/EP2021/082672 WO2022135814A2 (de) 2020-12-22 2021-11-23 Vorrichtung und verfahren zum schleifen eines profils

Publications (1)

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US20240084520A1 true US20240084520A1 (en) 2024-03-14

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US18/257,966 Pending US20240084520A1 (en) 2020-12-22 2021-11-23 Device and method for grinding a profile

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US (1) US20240084520A1 (de)
EP (1) EP4267798B1 (de)
JP (1) JP2024500798A (de)
KR (1) KR20230098639A (de)
CN (1) CN116457532A (de)
AU (1) AU2021406469A1 (de)
CA (1) CA3202132A1 (de)
WO (1) WO2022135814A2 (de)

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Publication number Publication date
EP4267798C0 (de) 2024-07-31
CN116457532A (zh) 2023-07-18
WO2022135814A2 (de) 2022-06-30
AU2021406469A9 (en) 2024-10-03
WO2022135814A3 (de) 2022-09-01
KR20230098639A (ko) 2023-07-04
AU2021406469A1 (en) 2023-06-15
EP4267798B1 (de) 2024-07-31
JP2024500798A (ja) 2024-01-10
EP4267798A2 (de) 2023-11-01
CA3202132A1 (en) 2022-06-30

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