DEVICE AND METHOD FOR MATERIAL PROCESSING THE HEARTHEAD OF A SWITCHING ARRANGEMENT

Description

[0001] The invention relates to a device and a method for material processing of the frog point of a frog of a turnout arrangement of a track system, in particular for reprofiling the geometry of the wheel overrun area of ​​a frog point.

[0002] Frogs are important components of track switches in railway construction and serve to allow rail vehicles with flanged wheels to switch from one track to another in the area of ​​the switch where two tracks diverge or merge. The gaps in the running surface that inevitably exist in the area of ​​the frogs cause impacts, leading to significant wear on the frog, especially at the frog point.

[0003] Damage to the frog caused by wear is regularly repaired by welding. Afterwards, the correct frog geometry must be restored, for example, by lowering the frog point appropriately or creating the desired longitudinal height profile. Currently, this is often done through time-consuming manual grinding. Accurately producing the required frog point lowering and wheel overrun areas according to the applicable specifications is hardly possible by hand with the specified tight tolerances, and compliance with these tolerances must be constantly checked using rulers and gauges. Even prior measurement of the frog using laser scanners to determine reference values ​​and regular laser checks of the manually performed reprofiling are time-consuming and do not always lead to an improvement.Furthermore, the operational downtimes during which repairs can be carried out are often very short, meaning that the repair work must be performed under time pressure. As a result, the work is frequently carried out imprecisely, necessitating repeated repairs of the core component at relatively short intervals, thus reducing its service life.

[0004] Devices and methods for material processing of frogs of turnout systems are known, for example, from EP 1979543 ​​B1, EP 2808446 A1, DE 202006015507 U1, DE 2642072 A1, AT 510566 B1, US 2002 / 0194722 A1, US 6663476 B1, US 7442115 B1 and WO 02 / 06587 A1.

[0005] The object of the present invention is to provide a means by which a desired frog geometry, for example a desired frog tip lowering, can be restored in situ in the wheel overrun area of ​​the frog in the case of a worn or damaged frog of a turnout arrangement.

[0006] To solve the problem, the invention provides, in a first aspect, a device for material processing of a frog point of a frog of a turnout arrangement of a track system with rails for rail vehicles with flanged wheels, comprising a) a rigid base frame for resting on the turnout assembly in the area of ​​the frog, wherein the base frame has fastening means for fixing the base frame to at least one rail of the turnout assembly, b) a rigid support frame for supporting a milling or grinding machine, wherein the support frame i. is pivotally connected or connectable at a point of contact with a first support frame part to a first base frame part of the base frame, and ii. is mounted or mountable with a second support frame part on a second base frame part of the base frame in such a way that the second support frame part of the support frame is displaceable in a plane parallel to a plane formed by the base frame and perpendicular to this plane, and c) a milling or grinding machine with a milling or grinding head, wherein i.ii. the milling or grinding machine is held by a holder on the holder frame in such a way that the milling or grinding machine with its milling or grinding head is displaceable within the holder frame in a plane formed by the holder frame in the direction of the point of contact and the second holder frame part which is slidably mounted on the second base frame part of the base frame, as well as in a transverse direction thereto, and ii. the milling or grinding machine with its milling or grinding head is displaceable perpendicular to the plane of the holder frame formed by the holder frame and is pivotable about an axis oriented parallel to the direction of the point of contact and the second holder frame part which is slidably mounted on the second base frame part of the base frame.

[0007] The device according to the invention, also referred to herein as a "frog milling machine," enables precise and reliable reprofiling of rails or rail sections, in particular the frog of a turnout assembly, in situ, and is comparatively simple in design and handling. The milling or grinding machine of the device according to the invention, held by the support frame, is adjustable in six directions, so that the milling or grinding head can be positioned as desired. The device is preferably designed to be portable, so that it can be easily transported to the place of use. Furthermore, the device is preferably not rail-guided, i.e., it does not have flanged wheels or the like, by which the device can be guided along a track like a rail vehicle. This makes the device according to the invention more flexible in its application.

[0008] The core concept of the invention is to provide a base frame and a mounting frame, which is tiltable and rotatable relative to the base frame, for supporting a milling or grinding machine. The base frame is equipped with suitable fastening means for securing the base frame, and thus the entire device, to one or more rails of a turnout assembly. The mounting frame has means by which the position of the milling or grinding head of the milling or grinding machine can be precisely and flexibly moved to any desired position. The device can be transported to the installation site fully assembled or in individual parts, for example, divided into a base frame component and a mounting frame component, and assembled there.The base frame can, for example, be placed on a turnout assembly in the area of ​​a frog point to be reprofiled and fixed there to one or more suitable rails of the turnout assembly, so that the device is fixed to the turnout assembly during the milling and / or grinding work to be carried out on the frog point. The retaining frame is articulated at the point of contact, for example by means of a gimbal bearing, to the base frame, so that it can be rotated at this point about a first axis perpendicular to the plane of the base frame, tilted about a second axis perpendicular to this first axis, and pivoted in the direction of the slidably mounted retaining frame section.

[0009] The term "in situ" here refers to on-site deployment, i.e., at an already installed track layout.

[0010] Here, "rail" refers to a railway track, such as a grooved rail, Vignoles rail, or crane rail. "Shoe rail" refers to a rail in the area of ​​a turnout to which a switch blade can be attached. "Switch rail" (also "switch blade" or "lever") refers to an adjustable rail end of a turnout, used to reverse the direction of travel.

[0011] In this context, a "switch arrangement" refers to a track arrangement used to change the direction of travel for rail-bound vehicles, i.e., rail vehicles. A switch arrangement allows rail vehicles to change between different tracks without interrupting their journey. Essential components of a switch arrangement include, for example, the switch blade assembly, which comprises a pair of fixed stock rails and a pair of transversely movable switch rails, as well as the frog, which includes the frog point (also called the "frog point") and the associated wing rails running parallel to the frog point. The frog point is the part of the frog where the inner rails of two diverging or converging tracks meet at an acute angle.Since the track surface is interrupted in the area of ​​the so-called frog gap, impacts regularly occur when rail vehicles pass over it, leading to increased wear, especially on the frog point.

[0012] The term "non-rail-guided" refers to the absence of device elements, in particular flanged wheels, that enable the device to travel on a track or at least one rail thereof.

[0013] The term "reprofiling" refers to the restoration of the desired geometry of a rail running surface, for example, the wheel overrun area of ​​a frog point. Reprofiling can be carried out by milling and / or grinding. According to DIN 8589, "milling" is defined as machining with a circular cutting motion assigned to the tool and an arbitrary feed motion, whereby the axis of rotation of the cutting motion maintains its position relative to the tool regardless of the feed motion. According to DIN 8589, "grinding" is defined as machining with bonded abrasive grains as geometrically undefined cutting edges.

[0014] The term "portable" in relation to the device according to the invention means that the weight of the device is within a range that allows it to be transported by a maximum of two people using muscle power, either as a whole or divided into a maximum of two or three components. The weight of the device can, for example, be in the range of 40-80 kg, preferably in the range of 45-75 kg, and more preferably in the range of 50-70 kg. By using suitable materials, for example, light metals such as aluminum, or suitable plastics, the weight of the device can be kept within a portable range.

[0015] In this context, "trapezoidal" refers to a frame whose sides are planar quadrilaterals with at least two parallel sides. A "rectangular" frame is a trapezoidal frame where all interior angles are right angles. The term "rectangular" includes the term "square." A square frame is a "rectangular" frame where all four sides are of equal length.

[0016] When reference is made here to a plane formed by a frame, e.g., the base frame or the support frame, this refers to a plane in which the frame essentially extends, regardless of whether all the individual frame elements lie within this plane or not. With regard to the base frame, for example, this refers to a plane that, in the operating situation, lies parallel to the plane in which the rail surfaces lie in the area of ​​the turnout assembly. This plane will often, but not necessarily, run horizontally in the operating situation. With regard to the support frame, this refers to a plane in which the milling or grinding machine can move back and forth between the point of contact and the movable support frame part. This plane can run parallel to the base frame plane, but depending on the tilting position of the support frame, i.e.,It also depends on whether the movable support frame part is offset perpendicular to the plane of the base frame or not. In the case of a trapezoidal, for example rectangular, frame, the plane is defined by the plane in which the parallel frame parts lie. This applies to both the base frame and the support frame.

[0017] The expression stating that the support frame "is supported or can be supported by a support frame part on a base frame part of the base frame" means that the support frame is supported or can be supported directly or indirectly by a part, such as a frame section, frame leg, or the like, on a part of the base frame. "Indirectly" means that a device, such as a lifting column or the like, is attached to the support frame, extending towards the base frame and supported or can be supported thereat at one end.

[0018] The formulation stating that the milling or grinding machine is pivotable about an axis oriented parallel to the direction of the point of contact and the second support frame part slidably mounted on the second base frame part means that the milling or grinding machine is pivotable about an axis that runs in or parallel to the line connecting the point of contact and the second support frame part mounted on the second base frame part, preferably its center point. The pivot axis lies in or parallel to the plane of the support frame.In the case of a rectangular retaining frame with four legs and a point of contact located on a first retaining frame leg, the axis preferably runs in or parallel to a line that preferably runs from the center of the first retaining frame leg to the center of the second retaining frame leg opposite the first retaining frame leg and parallel to the lateral third and fourth retaining frame legs connecting the first and second retaining frame legs.

[0019] When the terms "horizontal" or "vertical" are used here in relation to the pivoting of the support frame or the milling or grinding machine, these terms refer, unless the context clearly indicates otherwise, to the plane of the base frame. In operational situations, the base frame plane lies in or parallel to the plane of the railhead surfaces. Depending on the application, the base frame may also run parallel to the plane of the earth's surface. However, this is not necessarily the case, for example, with turnout arrangements installed on ramps or in mountainous terrain. Therefore, unless the context clearly indicates otherwise, a "horizontal" displacement or pivoting here means a displacement or pivoting in a plane parallel to the plane of the base frame, while a "vertical" displacement or pivoting means a displacement or pivoting in a direction orthogonal to the base frame plane.

[0020] The terms "front," "rear," and "side" with reference to the device according to the invention refer here to the position of the point of contact or of the first retaining frame or base frame part and to the position of the second retaining frame or base frame part. "Front" here refers to the part of the device with the point of contact, and "rear" refers to the part of the device that comprises the second retaining frame or base frame part opposite the point of contact. In the operational situation, "front" is generally the area of ​​the device according to the invention that is closer to the tip of the frog, while "rear" refers to that part of the device that lies in the direction of the opening rail legs of the frog. "Side" thus refers to areas of the retaining or base frame that connect the front and rear parts of the respective frame.

[0021] Where the terms "top" and "bottom" are used here, they refer to the relative positions of the frames and the intended operating situation, in which the base frame is positioned on the rails and the support frame above it. "Bottom" therefore means towards the base frame or rails, "top" means towards the support frame or away from the base frame or rails.

[0022] The expression "parallel to" used here, for example in relation to an axis, a plane, the course of a line or the like, can also include the fact that the parallel structures referred to coincide and are not spaced apart from each other.

[0023] For example, a formulation such as "an axis runs parallel to a line from A to B" implies that the axis lies in the line, or vice versa, so that the axis and the line coincide, unless the context or technical situation clearly indicates otherwise.

[0024] The term "heart milling machine" used in relation to the device according to the invention includes grinding and milling machines.

[0025] Both the base frame and the support frame can have various geometric shapes. A polygonal shape, for example, is not strictly necessary. Rather, the frames can also be generally circular or elliptical. Polygonal shapes, such as trapezoidal frames, are preferred for manufacturing reasons. In particular, the base frame is preferably designed so that it can be securely attached to at least one rail, preferably more than one, that is part of a turnout assembly using suitable fastening means, e.g., clamps. For example, the device can be attached to the wing rails in the area of ​​the first base frame section, i.e., in the area of ​​contact, and to the running rails behind the frog in the area of ​​the second base frame section.The base frame can, for example, be trapezoidal with a first leg and a second leg arranged parallel to it. The base frame is preferably an isosceles trapezoid, but can also be rectangular. The support frame can also be trapezoidal with a first leg and a second leg arranged parallel to it. Preferably, the support frame is an isosceles trapezoid, and more preferably, it is rectangular. In the case of a rectangular frame, it is preferred that the frame is not square, but has a greater longitudinal than transverse dimension. A rectangular support frame preferably has a greater longitudinal dimension in the direction from the point of contact to the opposite support frame section, i.e., a greater longitudinal dimension in the direction of the rail alignment.Accordingly, the base frame preferably also has a correspondingly larger longitudinal extent in this direction. The frame shapes of the base frame and the support frame within a device according to the invention can be combined in any suitable manner. For example, the base frame can be isosceles trapezoidal, with the first leg of the base frame being shorter than the second leg, while the support frame is rectangular. The base and support frames are, of course, designed and adapted to one another in such a way that the milling or grinding machine can be moved or pivoted and aligned with the workpiece in a suitable manner as described here, so that machining of the workpiece is not obstructed.If the mounting frame is not rectangular, the mounting of the milling or grinding machine is designed in such a way that the milling or grinding machine can be moved within the mounting frame by suitable means, for example telescopic extensions.

[0026] In a preferred embodiment of the device according to the invention: The base frame is trapezoidal, comprising a first base frame leg encompassing the first base frame part and a second base frame leg arranged parallel to it, comprising the second base frame part; the support frame is trapezoidal, comprising a first support frame leg encompassing the first support frame part and a second support frame leg arranged parallel to it, comprising the second support frame part; the first support frame leg of the support frame is pivotally connected to the first base frame leg of the base frame at the point of contact; and the second support frame leg of the support frame is attached to a lifting column slidably arranged on the second base frame leg and is slidable along the lifting column perpendicular to the second base frame leg.

[0027] In this embodiment of the device according to the invention, the first base frame leg is preferably shorter than the second base frame leg, and the retaining frame is preferably rectangular, but preferably not square.

[0028] Since the support frame is rotatably mounted about an axis at the point of contact, allowing the support frame and its second support frame section to pivot about this axis parallel to the base frame plane (e.g., horizontally in the operating situation), a circular arc-shaped section is preferably provided on the second base frame leg in this embodiment. This section is preferably in the form of a U-shaped profile arranged on a linear base frame leg, serving as a sliding or running surface on which the lifting column is mounted. The lifting column can, for example, have wheels at its base, allowing the lifting column and the attached second support frame leg to be moved. The second support frame leg is attached to the lifting column in a suitable manner so that it can be moved perpendicular to the second base frame leg. Other sliding means can be provided instead of wheels.

[0029] The base frame and the support frame can be made of any suitable materials or material combinations, for example, metal or plastic, but are preferably made of metal. Metal profile frames for both the base frame and the support frame are particularly preferred. The materials are preferably selected to combine sufficient stability and wear resistance with the lowest possible weight.

[0030] The adjustment of the position of the support frame relative to the base frame, e.g., the degree of pivoting around the point of contact in the horizontal and / or vertical direction, and the adjustment of the milling or grinding machine within the support frame are preferably carried out by means of suitable mechanical or electromechanical devices, for example, by means of linear units that can be adjusted manually (e.g., by means of a handwheel) or by means of motors (e.g., by means of electrically or otherwise driven geared motors). The pivoting of, for example, the milling or grinding head or the support frame around a pivot axis can also be achieved by locking the pivot axis at specific angular increments that are precisely defined or definable.

[0031] The device according to the invention can also be designed and set up in such a way that the milling or grinding machine with its milling or grinding head is operated in a laser-controlled manner, so that the relative position of the milling or grinding head to the core tip can be adjusted in a laser-controlled manner.

[0032] In another aspect, the present invention also relates to a method for material processing of a frog point of a turnout arrangement of a track system with rails for rail vehicles with flanged wheels, comprising the following steps: a. Arranging a device according to one of the preceding claims with the base frame on a turnout assembly in the area of ​​the frog of the turnout assembly, b. Fixing the device by means of the fastening means of the base frame on the turnout assembly in the area of ​​the frog, c. Aligning the milling or grinding head of the milling or grinding machine in the holding frame in relation to the frog point, and d. Milling or grinding the frog point.

[0033] In a preferred embodiment of the method according to the invention, the milling or grinding head is positioned by means of laser control.

[0034] The invention is explained in more detail below with reference to the attached drawings for illustrative purposes only. Figure 1 . Schematic top view (A) of the frog of a turnout arrangement and profile view (B) of the frog point. Figure 2. Spatial view of an embodiment of a device according to the invention in use from one side. Figure 3 Spatial view of the in Figure 3 The illustrated embodiment of a device according to the invention is shown in use from another side. Figure 4 . Schematic views of an embodiment of a device according to the invention from a longitudinal side (A), in a top view (B), from a first narrow side (C) and the opposite narrow side (D). Figure 5 Detailed view of a part of the Figure 3 and 4 The illustrated embodiment of a device according to the invention with the contact point. Figure 6 Further detailed view of a part of the Figure 3 and 4 illustrated embodiment of a device according to the invention.

[0035] Figure 1Figure 1 shows a simplified schematic top view (A) of a frog 101 of a turnout arrangement 100 with a frog point 102, the wing rails 103 flanking the frog point 102 and the frog gap 108, i.e. the interruption of the running rails 109 in the area of ​​the frog 102. In the lower part of the Figure 1 (B) A side profile view of the frog point 102 is shown. As seen from Figure 1BAs can be seen, the frog point 102 has a specific height profile geometry in the wheel overrun area, i.e., a stepped lowering relative to the track level 110. The number and dimensions of the steps can vary depending on the application or region. In the embodiment shown here as an example, the frog point 102 is lowered overall in the horizontal direction over a length B and in the vertical direction over a height b, with a more steeply inclined step over a length A and a height a. This height profile can be lost during repair welding on the frog point 102 and must be renewed. Such reprofiling can be carried out using the device 1 according to the invention.

[0036] Figure 2 shows an embodiment of a device 1 according to the invention in an operational situation (see also Figure 3(from a different perspective). A core 101 with core tip 102 and wing rails 103 can be seen. The device 1 according to the invention has an isosceles trapezoidal base frame 2 made of metal profiles with four base frame legs 23, 24, 25 and 26. A first base frame leg 23 forms the front of the base frame 2, the second base frame leg 24 the rear part of the base frame 2. The third and fourth base frame legs 25, 26 are longer than the transverse front and rear base frame legs 23, 24 and form the side part of the base frame 2.The terms "front," "rear," and "side" refer here to the position relative to the frog point. The front part of the base frame 2 is the part that, in the operating situation depicted here, is closer to the frog point 102, while the rear part is the part of the base frame 2 that lies in the direction of the opening arms 111 of the frog 101. Without reference to a switch arrangement 100, the "front" part of the device 1 is also understood here to be the part of the device 1 with the contact point 5, and the "rear" part of the device 1 is understood to be the part of the device 1 opposite the contact point 5. The first (front) base frame arm 31, comprising a first base frame part 21, is shorter than the second (rear) base frame arm 24, comprising a second base frame part 22.The base frame 2 rests horizontally on rails in the area of ​​the frog 101 with its first (front) and second (rear) base frame legs 23, 24, and is fixed there by means of fastening means 27, which are only indicated here and may include, for example, clamping jaws or the like, so that the device 1 is fixed in the area of ​​the frog 101. The base frame 2 is oriented such that the longer lateral base frame legs 25, 26 extend essentially in the direction of the track alignment of the running rails 109 or wing rails 103, and the base frame opening 29 allows free access to the frog 101. The second (rear) base frame leg 24 comprises a second base frame part 22 on which a U-profile 28 shaped like a circular arc is arranged. The center of the arc is, for example, a point in the middle of the first (front) base frame leg 23.

[0037] The device 1 comprises a rectangular retaining frame 3 with four retaining frame legs 33, 34, 35, 36, a first (front) retaining frame leg 33 and a second (rear) retaining frame leg 34, and two third and fourth retaining frame legs 35, 36 that are longer (lateral) than the first and second retaining frame legs 33, 34. The first (here front) retaining frame leg 33 comprises a first retaining frame part 31, which is pivotally connected (for example, by means of a gimbal bearing) to the first base frame part 21 of the base frame 2 at a contact point 5. The retaining frame 3 is rotatably and tiltably mounted at this contact point 5, so that the retaining frame 3 can be rotated horizontally about the contact point 5 and tilted vertically.The first retaining frame leg 33 with the first retaining frame part 31 is opposite the second retaining frame leg 34 with the second retaining frame part 32. The retaining frame 3 is mounted on the second base frame part 22 of the base frame 2 via a lifting column 6 by means of the second retaining frame part 32, such that the second retaining frame part 32 of the retaining frame 3 lies in a base frame plane 20 parallel to a base frame plane 20 formed by the base frame 2 (see also ). Fig. 6The second mounting frame part 32 is displaceable within the mounting frame plane 30 and perpendicular to the base frame plane 20. The displacement of the second mounting frame part 32 within the mounting frame plane 30, which in practical use typically corresponds to a horizontal or lateral displacement, can be achieved, for example, manually or electrically using a linear unit 65. In the embodiment shown here, the linear unit 65 comprises a linear axis 64 with a spindle, which can be adjusted manually using a handwheel 63. Manual adjustment using a handwheel or the like is preferred for greater flexibility, so as not to be dependent on a power supply at the installation site.The second support frame part 32 is mounted on the second base frame part 22 via a lifting column 6, to which the second support frame part 32 is attached and can be moved in a perpendicular direction to the base frame plane 20, i.e., regularly in a vertical direction in the operating situation. In the case of... Fig. 2 In the illustrated embodiment, precise vertical displacement of the second support frame part 32 is possible by means of a handwheel 62 and a linear unit located in the lifting column 6. However, a motorized version, for example an electric motor, can also be used. The lifting column 6 has wheels 61 on its bottom side, i.e., towards the base frame 2, by means of which the lifting column 6 can be moved on the second base frame part 22. For this purpose, a U-profile 28 shaped like a circular arc is attached to the second base frame leg 24, in which the lifting column 6 with the wheels 61 can move.

[0038] The milling or grinding machine 4 is movably mounted in the support frame 3 by means of a bracket 7. The milling or grinding machine 4 is oriented towards the first support frame leg 33 with the first support frame part 31 and thus towards the point of contact 5 between the support frame 3 and the base frame 2. In the embodiment shown here, the bracket 7 comprises a plate 72 which can be moved longitudinally within the support frame 3 by means of a handwheel 38 via a double-tube linear unit 39 with linear axes 391 arranged outside the support frame 3 and running parallel to the third and fourth support frame legs 35, 36. "Longitudinally" means that the plate 72 can be moved back and forth between the first support frame leg 33 with the first support frame part 31 and the second support frame leg 34 with the second support frame part 32. Instead of manual operation via handwheel 38, the drive can also be motorized.The milling or grinding machine 4 is held by the support 7 on this plate 72 and can be moved with the plate 72 in the support frame 3. By means of a further linear unit 75, which includes a linear axis 74 and a handwheel 73, the milling or grinding machine 4 can be moved back and forth in the transverse direction, i.e., between the third support frame leg 35 and the fourth support frame leg 36, on the plate 72. In addition, a manually adjustable angle adjustment 77 is arranged on the plate 72 by means of a handwheel 76 and a linear axis 78, by means of which the milling or grinding machine 4 can be pivoted in the direction between the third and fourth support frame legs 35, 36. The milling or grinding machine 4 is connected to the angle adjustment 77 via a lifting column 71, to which the milling or grinding machine 4 is attached, so that the lifting column 71 can be swivelled together with the milling or grinding machine 4.The milling or grinding machine 4 can be pivoted in precise angular increments, preferably by locking the rotary axis 8 about which the milling or grinding machine 4 is pivoted, via the angle adjustment 77. The milling or grinding machine 4 can be moved forward and backward along the lifting column 71 towards the base frame 2, and thus, in the operating situation, towards a central component 101, by means of a handwheel 79, in order to adjust the feed rate of the milling or grinding machine 4.

[0039] Figure 3 Figure 1 shows a spatial view of the device 1 according to the invention, looking at the "back side", i.e., the part of the device 101 that is directed towards the opening legs 111 of the core in the operating situation. Figure 2 Device shown 1. To avoid unnecessary repetition, reference is made here to the description of Figure 2 referred.

[0040] The Figure 4 and 5show excerpts from certain areas of the device according to the invention from the Figure 2 and 3 . In Figure 4 Figure 1 shows a side view from an oblique angle of above of the front part of the device 1 according to the invention. Figure 5 A view of the reverse side of the bracket 7 for the milling or grinding machine 4. Reference numerals correspond to those in the Figure 2 and 3 used. In particular from Figure 4The contact point 5 with the gimbal bearing 55 is visible in greater detail. The gimbal bearing 55 comprises the pivot axis 51 and the rotation axis 52 (not visible) and is connected to the mounting frame 3 on one side and to the base frame 2 on the other via a plate 53 attached internally to the first support frame part 31, a plate 54 attached to the first base frame part 21, and a connecting piece 56. The bearing 55 is designed here as a pillow block bearing (e.g., type SYK 30 TF, SKF GmbH, Schweinfurt, Germany) with a deep groove ball bearing with a spherical outer ring surface. The support frame legs 33, 34, 35, 36 are connected at the corners by corner elements 301 and thereby stiffened against each other to make the support frame 3 as rigid as possible. Fig. 5 The bearing 81 for axis 8 for angle adjustment of the milling or grinding machine 4 is also recognizable.

[0041] Figure 6The figure shows, in a highly schematic form, the various adjustment options of the milling or grinding machine 4 in the device according to the invention. For ease of reference, a coordinate system is shown on the left in each figure. Figure 6A Figure 1 shows a side view. The device 1, with its base frame 2, is arranged and fixed on the frog 101 with its frog point 102. The base frame plane 20, which lies in the xy direction, runs parallel to the track plane 110. In the situation shown here, which, unlike the Figure 3 and 4In a position of the retaining frame 3 in which the second retaining frame leg 34 with the second retaining frame part 32 is arranged along the lifting column 6 in the lowest position, the retaining frame plane 30 is also parallel to the base frame plane 20 and the guide rail plane 110. However, this is no longer the case as soon as the retaining frame 3 with its second retaining frame part 32 is moved vertically relative to the base frame 2 along the direction indicated by arrow 203. A situation in which the second retaining frame part 32 is moved along the lifting column 6 into an upper position is shown in the Figure 3 and 4The retaining frame 3 is tilted or inclined about the axis 51 at the point of contact 5 between the retaining frame 3 and the base frame 2 when the second retaining frame part 32 is moved along the lifting column 6, as indicated by the arrow 201. The inclination relative to the base frame plane 20 can be, for example, 0-9°. The retaining frame 3 is preferably mounted on the axis 51, preferably gimbal-mounted, such that it can be retracted or advanced towards the lifting column 6 when the second retaining frame part 32 is moved in the z-direction, i.e., generally vertically. Figure 6BFigure 1 shows a top view of the device 1 according to the invention. The heart-shaped tip 102, located under the base frame 2 and the support frame 3 arranged on the base frame 2, is schematically indicated. The support frame 3 is rotatably mounted about the axis 52 at the point of contact 5, as indicated by arrow 206, and can be pivoted with its opposite second support frame part 32 in the y-direction, which generally corresponds to a horizontal direction, as indicated by arrow 207, for example by ±5°. The milling or grinding machine 4 can be moved in its support 7 along arrows 204 and 205 in the longitudinal direction (x-direction, arrow 205) and transversely to it (arrow 204), i.e., in the y-direction, depending on the frame size, for example by 0-1440 mm in the longitudinal direction and ±80 mm in the transverse direction.

[0042] The Figure 6Cand 6D show a front view of the device 1, i.e., of the first retaining frame part 31 and the first base frame part 21 ( Fig. 6C), and from behind onto the device 1, i.e., onto the second support frame part 32 and the second base frame part 22. The milling or grinding machine 4 can be moved vertically, or along the pivotable lifting column 71 (not shown here), in the z-direction (arrow 202) and in the y-direction, for example by 0-100 mm. In addition, the milling or grinding machine 4 can be pivoted in the y-direction about an axis 8, for example by ±30°, as indicated by arrow 208, for example for chamfering the frog point 102. Preferably, angle locks can be provided here to precisely set and fix the angle by which the milling or grinding machine 4 is pivoted. In Figure 6D, the displacement possibilities of the lifting column 6 in the direction of arrow 207 and of the second support frame part in the vertical direction are indicated by arrows 207 and 203.

Claims

1. A device (1) for material machining of a frog point (102) of a frog (101) of a points arrangement (100) of a track system with rails for rail vehicles with flanged wheels, with said device comprising a) a rigid base frame (2) for placement on the points arrangement (100) in the region of the frog (101), wherein the base frame (2) has fastening means (21) for fixing the base frame (2) on at least one rail of the points arrangement (100), b) a rigid holding frame (3) for holding a milling or grinding machine (4), wherein the holding frame (3) i. is or can be connected to a first base frame part (21) of the base frame (2) in an articulated manner at a contact point (5) by means of a first holding frame part (31) and ii. is or can be mounted on a second base frame part (22) of the base frame (2) by means of a second holding frame part (32) in such a way that the second holding frame part (32) of the holding frame (3) can be displaced in a plane lying parallel to a plane (20) formed by the base frame (2), as well as perpendicular to this plane, and c) a milling or grinding machine (4) with a milling or grinding head (41), wherein i. the milling or grinding machine (4) is held by the holding frame (3) by means of a bracket (7) in such a way that the milling or grinding machine (4) with its milling or grinding head (41) can be displaced within the holding frame (3) in the direction of the contact point (5) and the second holding frame part (32) displaceably mounted on the second base frame part (22) of the base frame (2), as well as transverse thereto, in a plane (30) formed by the holding frame (3), and ii. the milling or grinding machine (4) with its milling or grinding head (41) can be displaced perpendicular to the holding frame plane (30) formed by the holding frame (3) and pivoted about an axis (8) that is oriented parallel to the direction of the contact point (5) and the second holding frame part (32) displaceably mounted on the second base frame part (22) of the base frame (2).

2. The device (1) according to claim 1, wherein - the base frame (2) is designed in a trapezoidal manner with a first base frame piece (23) that comprises the first base frame part (21) and a second base frame piece (24) that comprises the second base frame part (22) and is arranged parallel to the first base frame piece, - the holding frame (3) is designed in a trapezoidal manner with a first holding frame piece (33) that comprises the first holding frame part (31) and a second holding frame piece (34) that comprises the second holding frame part (32) and is arranged parallel to the first holding frame piece, - the first holding frame piece (33) of the holding frame (3) is connected to the first base frame piece (23) of the base frame (2) in an articulated manner at the contact point (5), and - the second holding frame piece (34) of the holding frame (3) is fastened on a lifting column (6), which is displaceably arranged on the second base frame piece (24), and can be displaced perpendicular to the second base frame piece (24) along the lifting column (6).

3. The device according to claim 2, wherein the first base frame piece (23) is shorter than the second base frame piece (24) and the holding frame (3) is rectangular.

4. The device (1) according to one of claims 2 or 3, wherein the lifting column (6) can be displaced in a u-profile (28) fastened on the second base frame piece (24) by means of wheels (61).

5. The device (1) according to one of the preceding claims, wherein the base frame (2) and the holding frame (3) are metal profile frames.

6. The device (1) according to one of the preceding claims, wherein the device (1) is portable.

7. A method for material machining of a frog point (102) of a frog (101) of a points arrangement (100) of a track system with rails for rail vehicles with flanged wheels, particularly for reprofiling the frog point, wherein said method comprises the following steps: a. arranging the base frame (2) of a device (1) according to one of the preceding claims on a points arrangement (100) in the region of the frog (101) of the points arrangement (100), b. fixing the device (1) on the points arrangement (100) in the region of the frog (101) with the aid of the fastening means (27) of the base frame (2), c. aligning the milling or grinding head (41) of the milling or grinding machine (4) relative to the frog point (102) in the holding frame (3), and d. milling or grinding the frog point (102).

8. The method according to claim 7, characterized in that the alignment of the milling or grinding head (41) of the milling or grinding machine (4) takes place in a laser-controlled manner.