WO2020057769A1

WO2020057769A1 - Device for re-profiling and deburring rails

Info

Publication number: WO2020057769A1
Application number: PCT/EP2019/000252
Authority: WO
Inventors: Sven KUMMER; Sergei KOOP; Karsten CESCHIA
Original assignee: Goldschmidt Thermit Gmbh
Priority date: 2018-09-17
Filing date: 2019-09-03
Publication date: 2020-03-26
Also published as: AU2019343430A1; EP3853415A1; EP3853415B1; DE202018004312U1; HUE066284T2; CN112955607A; AU2019343430B2

Abstract

A device for re-profiling and deburring rails (2, 3) consists of a frame that can be placed against the rails (2, 3) on both sides thereof, in which frame a tool is held adjustably in the direction of the rails (2, 3) for the purpose of machining. Adjustment movements are configured in the form of a first translational movement in the axial direction of the tool, a second translational movement in the horizontal plane and a third rotational movement about an axis extending parallel to the rail longitudinal direction. In order to produce the second translational movement, a frame-like carrier (6) is mounted in the outer frame so as to be able to slide in the direction of the arrows (5), wherein in order to produce said rotational movement a tool slide supporting the tool is movable along two arcuate guides which extend in parallel vertical planes spaced from one another and which are arranged on the carrier, thus resulting in a pivoting movement about the axis extending parallel to the rail longitudinal direction.

Description

Device for reprofiling and deburring rails

The invention relates to a device according to the preamble of claim 1.

A device intended for machining rail connections, in this case for removing weld metal excesses, is known, for example, from WO 2011/059395 A1. Here, an inner frame carrying a grinding tool with a drive is held in an outer frame so as to be pivotable about an axis extending axially parallel to the rail connection to be treated. The pivot axis defined in this way is located above the rail head of the

Rail connection. The outer frame is supported by support rollers on the rail head area of one of the two rails of a track and can be moved along the rail connection. In a plane perpendicular to the longitudinal direction of the rail connection, specifically along a semicircular guide which is fixedly connected to the outer frame, a rotary feed movement of the grinding tool carried by the inner frame is set up. The grinding tool is also arranged to be deliverable in the direction of the rail profile, all of these infeed movements being numerically controllable. No further delivery movements are planned. In this device, the cylindrical grinding tool shown by way of example in connection with the disclosed infeed movements is not to be considered optimal, so that the largest possible contact surface on the rail profile to be machined cannot always be represented. To display a stable position of the device during a machining process, a comparatively complicated system of support rollers is required, which partially engage under the rail head. Finally, relatively large masses, namely the entire inner frame, have to be moved to represent the rotary feed movement.

CONFIRMATION COPY A further comparable device, also intended for machining a rail head profile, is described in AT 13916 U1. In this case, an outer frame is provided on the laterally opposite rails of a track, which can be moved in their longitudinal direction and in which the grinding tool can be adjusted vertically and horizontally, namely in the direction of the rail head to be machined. In addition, there is a further infeed movement along arcuate slots in a horizontal plane

set up. The feed movements are characterized by spindle drives and can be carried out manually. However, a considerable amount of construction is required for the technical representation of these infeed movements. a. through long spindles in order to be able to provide the required movement ranges.

The infeed movements of the machining tools that can be seen from this prior art are not to be regarded as optimal, since the largest possible contact surface of the tool on the rail surface to be machined in the area of the rail head does not always exist, or at least appears to be in need of improvement.

Against this background, it is the object of the invention to design a device of the type described at the outset which opens up as much movement space as possible of a cylindrical grinding tool, for example, and thus in particular allows optimal positioning on the rail head. This object is achieved in such a device by the features of the characterizing part of claim 1.

Essential to the invention here is the technical representation of the infeed movements, which was carried out with the aim of achieving stable and highly precise movements

to generate. The frame-like carrier, which is designed to represent a translatory horizontal movement, can be designed like a drawer and can be mounted on both sides with little or no play in special guides of the outer frame. In this way, the carrier is guided very precisely and thus this horizontal feed movement. It is also essential to the invention that two circular arc-shaped guides, spaced apart from one another, are provided on the carrier to represent the rotary movement, through which the Tool slide and thus the tool carried by it also experiences a very precise and resilient guidance for this movement component.

According to the features of claim 2, the tool slide is arranged between said guides. This enables the reaction forces arising from the machining process to be transferred symmetrically to the carrier and thus to the outer frame.

According to the features of claim 3, a displaceable support structure is provided on the tool slide, which can be guided like a drawer on both sides and is designed as a support for the tool. Precise guidance is thus also set up for this infeed movement.

The features of claims 4 and 5 are directed to the more detailed design of the elements intended to represent the rotary movement. In any case, a fixed tooth profile is arranged on the guides mentioned, which is in engagement with a drivable toothed or sprocket.

The braking device according to the features of claim 6 serves to secure the working position of the tool slide during the machining of a

Rail head profile.

According to the features of claim 7, the outer frame is supported by wheels on the rails. The wheels are expediently equipped with a

Parking brake equipped to the position of the device in the

Secure processing position.

It can be seen from the above explanations that the device according to the invention provides a device which, in addition to a precise alignment of the infeed movements, enables versatile adaptation options to a rail head profile to be machined, high profile coverage and thus efficient reprofiling. The invention will be explained in more detail below with reference to the accompanying drawing figures. Show it:

Figure 1 is a perspective view of the device according to the invention in the working position.

2 shows an isolated perspective view of the pivoting mechanism of the device in one end position;

Figure 3 is an isolated perspective view of the pivoting mechanism of the device in the other end position.

Fig. 4 is an isolated perspective view of the tool carriage of the

Contraption;

FIG. 5 shows a plan view of the tool slide V of FIG. 4 on the order side; FIG.

Fig. 6 is a sectional view of the device corresponding in a vertical plane.

1 in FIG. 1 is a track, on the rails 2, 3 of which the device is supported on wheels 4 on both sides. The device consists of an approximately rectangular outer frame 7, at the four corners of which the wheels 4 are each mounted.

In the frame 7, in a direction of the arrows 5 transversely to the longitudinal extent of the rails 2, 3, a drawer-like carrier 6 is accommodated to be horizontally displaceable. The globally rectangular carrier 6 in plan view is supported on both sides in the frame 7 and in this way is guided precisely and in accordance with the stress. The carrier 6 is - transversely to the longitudinal direction of the rails 2, 3 spaced in the longitudinal direction - provided with two circular guides 8, 9, which extend parallel to each other in vertical planes and each serve to support a roller chain 10, 11. The carrier 6 can be displaced in the frame 7 by means of a drive 17 in order to show a feed movement in the direction of the arrows 5. The drive 17 can be a hydraulic drive.

Each roller chain 10, 11 is in engagement with a sprocket 12, which is operatively connected to a drive arranged on a tool slide 13, the tool slide 13 being pivotally mounted about an ideal horizontal axis 14 relative to the carrier 6. The system of the guides 8, 9 thus forms circular paths around a pivot point, which is represented by the ideal axis 14 on the carrier 6.

To secure the working position of the tool slide 13 under workload during the machining of the rails 2, 3, in particular the respective rail head, a braking device 18 is provided, which is automatically released during an understanding along the said circular path. The braking device 18 is designed, for example, as a hydraulic brake, but others

Techniques cannot be excluded.

At the end of the tool slide 13 facing the rail 3 to be machined, two cylindrical abrasive carriers 15 can be driven to rotate about an axis which extends in the direction of the rail head to be machined. The feed movement of the abrasive carrier 15 ideally takes place in the direction of a virtual pole. To represent the infeed movement in the direction of the

Toward the rail head, the tool slide 13 is provided with a carrier structure 20, via which the abrasive carrier 15 is advanced in this direction. The tool slide 13 comprises the rotary drive of the abrasive carrier 15 and a drive for the purpose of displaying a feed movement in the direction of the axis mentioned, thus the arrows 16.

Thus, three infeed movements of the abrasive carrier 15 are set up for machining the rail head, namely a rotational movement around the axis 14, a first translatory movement in the direction of the arrows 5 in a horizontal plane and a second translatory movement in the direction of the arrows 16, thus in the direction of the

Rail head. A control is provided for the coordination of the infeed movements of the abrasive medium carrier 15, so that partially or even fully automatic operation is possible.

Finally, 19 denotes a rod-shaped support for a luminous or signal body.

Reference symbol list:

1 track

2 rails

3 rails

4 impeller

5 direction

6 carriers

7 frames

8 leadership

9 leadership

10 roller chain

1 1 roller chain

12 sprocket

13 tool slides

14 axis

15 abrasive carriers

16 arrows

17 drive

18 braking device

19 carriers

20 support structure

Claims

EXPECTATIONS

1. Device for machining rails (2, 3), with an outer frame (7) which can be placed on both sides of the rails and in which a tool can be delivered in the direction of the rails for processing, the infeed movements being transverse to the Longitudinal extension of the rails (2, 3) and thus comprise a first translational movement in the axial direction of the tool, a second translational movement in the horizontal plane and a rotational movement about an axis (14) extending parallel to the longitudinal direction of the rail characterized in that a frame-like carrier (6) is slidably mounted in the direction of the arrows (5) to represent the second translational movement and that a tool carriage (13) carrying the tool along two circular arcs is used to represent the rotational movement , extending in mutually spaced parallel vertical planes, on the carrier (6) a named guides (8, 9) is movable, thereby causing a pivoting about the axis (14).

2. Device according to claim 1, characterized in that the tool slide (13) is arranged between the guides (8, 9).

3. Device according to claim 1 or 2, characterized in that for the representation of the first translational movement on the tool slide (13) a carrying the tool in the direction of the tool axis

displaceable support structure (20) is arranged.

4. Device according to one of claims 1 to 3, characterized in that the guide (8, 9) each carries a fixed tooth profile which is in engagement with a drivable gear wheel for the purpose of representing the rotational movement.

5. The device according to claim 4, characterized in that the toothed profile is formed by a fixed roller chain (10, 11) and the gear by a chain wheel (12).

6. Device according to one of the preceding claims 1 to 5, characterized in that a brake device (18) is provided for fixing the tool slide (13) under workload, the engagement of which can be automatically released when an adjustment movement is initiated.

7. Device according to one of the preceding claims 1 to 6, characterized in that the outer frame via wheels (4) on two mutually opposite rails (2, 3) of a track (1) can be supported. .