AU2019343430A1

AU2019343430A1 - Device for re-profiling and deburring rails

Info

Publication number: AU2019343430A1
Application number: AU2019343430A
Authority: AU
Inventors: Karsten CESCHIA; Sergei KOOP; Sven KUMMER
Original assignee: Goldschmidt Holding GmbH
Current assignee: Goldschmidt Holding GmbH
Priority date: 2018-09-17
Filing date: 2019-09-03
Publication date: 2021-03-18
Anticipated expiration: 2039-09-03
Also published as: EP3853415A1; AU2019343430B2; EP3853415B1; DE202018004312U1; WO2020057769A1; CN112955607A

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

SPECIFICATION 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, here for removing weld metal overhangs, is known from WO 2011/059395 Al, for example. A grinding tool with an inner frame that carries a drive is here held so that it can swivel around an axis extending axially parallel to the rail connection to be machined in an outer frame. The swiveling axis defined in this way is located above the railhead of the rail connection. The outer frame is supported by support rollers against the railhead area of the one of two rails of a track, and can be moved along the rail connection. A rotatory feed motion of the grinding tool carried through the inner frame is established in a plane perpendicular to the longitudinal direction of the rial connection, specifically along a semicircular guide fixedly connected with the outer frame. The guiding tool is further arranged so that it can be fed in the direction toward the rail profile, wherein all of these feed motions can be numerically controlled. Additional feed motions are not provided. In this device, the exemplarily depicted cylindrical grinding tool in conjunction with the disclosed feed motions must be regarded as non-optimal in this device, so that a per se desired largest possible contact surface cannot always be produced on the rail profile to be machined. A comparably complicated system of support rollers that partially engage underneath the railhead is required to establish a stable position for the device during a machining process. Finally, establishing the rotatory feed motion requires moving relatively extensive masses, specifically the complete inner frame.

AT 13916 Ul describes another comparable device, which is likewise intended for machining a railhead profile. Provided here is an outer frame rack arranged so that it can traverse the lateral, opposing rails of a track in their longitudinal direction, in which the grinding tool is arranged so that it can be fed vertically and horizontally, specifically in the direction toward the railhead to be machined. Another feed motion is further established along arc-shaped slits in a horizontal plane. The feed motions are characterized by spindle drives, and can be manually initiated. However, a significant construction volume is required for technically producing these feed motions, due among other things to long spindles for being able to provide the required movement ranges.

The feed motions of the machining tools evident from this prior art are not to be regarded as optimal, since a largest possible contact surface for the tool against the rail surface to be machined in the area of the railhead is not given in all cases, and at the very least appears in need of improvement.

Against this backdrop, the object of the invention is to develop a device of the kind described at the outset, which opens up a largest possible movement range for an exemplarily cylindrical grinding tool, and hence in particular allows an optimal positioning on the railhead. This object is achieved in such a device by the features in the characterizing clause of claim 1.

Essential to the invention here is the technical production of the feed motions, which is pursued with the objective of generating stable and highly precise motions. The frame-like carrier set up to produce a translatory, horizontal motion can be designed like a drawer and mounted with little or no play in special guides of the outer frame. This provides a very precise guide for the carrier, and hence this horizontal feed motion. Further essential to the invention is that two arc-shaped guides spaced apart from each other are provided on the carrier for producing the rotatory motion, which impart a very precise and loadable guidance to the tool carriage, and hence to the tool it carries, even for this movement component.

According to the features of claim 2, the tool carriage is arranged between the mentioned guides. This enables a symmetrical transmission of the reaction forces arising from the machining process to the carrier, and thus the outer frame.

According to the features of claim 3, a movable carrier structure arranged on the tool carriage is provided, which can be guided like a drawer on both sides, and is configured like the tool carrier. As a consequence, a precise guide is established for this feed motion as well.

The features in claims 4 and 5 are geared toward the more detailed structural configuration of the elements intended for producing the rotatory motion. In each instance, a fixed toothed profile is arranged on the mentioned guides, which engages with a drivable gearwheel or chainwheel.

The brake mechanism according to features in claim 6 serves to secure the working position of the tool carriage while machining a railhead profile.

According to features in claim 7, the outer frame is mounted on the rails by wheels. The wheels are expediently equipped with a parking brake, so as to secure the position of the device in the machining position.

As evident from the above statements, the device according to the invention provides a device which, aside from a precise alignment of the feed motions, enables a variety of possible adjustments to a railhead profile to be machined, a high coverage of the profile, and hence an efficient reprofiling.

The invention will be described in more detail below with reference to the attached drawing figures. Shown on:

Fig. 1 is a perspective view of the device according to the invention in a work position;

Fig. 2 is an isolated, perspective view of the swiveling mechanism of the device in the one end position;

Fig. 3 is an isolated, perspective view of the swiveling mechanism of the device in the other end position;

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

Fig. 5 is a planar view or front view of the tool carriage V on Fig. 4;

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

Denoted by 1 on Fig. 1 is a track, wherein the device is mounted on its rails 2, 3 on both sides by wheels 4. The device consists of a roughly rectangular outer frame 7, on whose four corners the wheels 4 are each mounted.

In the direction of the arrows 5 transverse to the longitudinal extension of the rails 2, 3, a drawer-like carrier 6 is horizontally movably received in the frame 7. The globally rectangular carrier 6 as viewed from above is mounted in the frame 7 on both sides, and in this way is precisely guided suitable for the load. Spaced apart transversely to the longitudinal direction of the rails 2, 3 in their longitudinal direction, the carrier 6 is provided with two circular arc-like guides 8, 9, which extend parallel to each other in vertical planes, and each serve to mount a roller chain 10, 11.

The carrier 6 can be moved in this frame 7 by means of a drive 17 to produce a feed motion in the direction of the arrows 5. The drive 17 can be a hydraulic drive.

Each roller chain 10, 11 engages with a chainwheel 12, which is operatively connected with a drive arranged on a tool carriage 13, wherein the tool carriage 13 is mounted so that it can swivel around an ideal horizontal axis 14 relative to the carrier 6. The system of guides 8, 9 thus forms circular paths around a pivot point, which is produced by the ideal axis 14 on the carrier 6.

In order to secure the work position of the tool carriage 13 under a working load while machining the rails 2, 3, in particular the respective railhead, a brake mechanism 18 is provided, which is automatically released during an adjustment along the mentioned circular path. For example, the brake mechanism 18 is designed as a hydraulic brake, but other techniques are not precluded.

At the end of the tool carriage 13 facing the rails 3 to be machined, two cylindrical grinding means carriers 15 can be driven so as to rotate around an axis, which extends in the direction toward the railhead to be machined. The feed motion of the grinding means carrier 15 ideally takes place in the direction of a virtual pole. In order to produce the feed motion in the direction toward the railhead, the tool carriage 13 is provided with a carrier structure 20, via which the grinding means carrier 15 is fed in this direction. The tool carriage 13 comprises the rotary drive of the grinding means carrier 15 as well as a drive for producing the feed motion in the direction of the mentioned axis, and hence of the arrows 16.

As a consequence, three feed motions of the grinding means carrier 15 are set up for machining the railhead, specifically a rotatory motion around the axis 14, a first translatory motion in the direction of the arrows 5 in a horizontal plane, and a second translatory motion in the direction of the arrows 16, and hence in a direction toward the railhead.

A controller is provided for coordinating the feed motions of the grinding means carrier 15, thus enabling partially or even fully automatic operation.

Finally, 19 denotes a rod-shaped carrier for a light fixture or signal device.

Reference List:

1 Track 2 Rail 3 Rail 4 Wheel Direction 6 Carrier 7 Frame 8 Guide 9 Guide Roller chain 11 Roller chain 12 Chainwheel 13 Tool carriage 14 Axis Grinding means carrier 16 Arrows 17 Drive 18 Brake mechanism 19 Carrier Carrier structure

Claims

1. A device for machining rails (2, 3), with an outer frame (7) that can be placed on the rails on both sides, in which a tool is held so that it can be fed in the direction toward the rails with feed motions for machining purposes, wherein the feed motions are established in a direction transverse to the longitudinal extension of the rails (2, 3), and comprise a first translatory motion in the axial direction of the tool, a second translatory motion in the horizontal plane, and a rotatory motion around an axis (14) extending parallel to the longitudinal direction of the rails, characterized in that the second translatory motion is produced by mounting a frame-like carrier (6) in the outer frame (7) so that it can slide in the direction of the arrows (5), and that, in order to produce the rotatory motion, a tool carriage (13) that carries the tool can be moved along two circular arc like guides (8, 9) that extend in parallel vertical planes spaced apart from each other and are arranged on the carrier (6), thereby inducing a swiveling around the horizontal axis (14).

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

3. The device according to one of claims 1 or 2, characterized in that that the first translatory motion is produced by arranging a carrier structure (20) that carries the tool and can move in the direction of the tool axis on the tool carriage (13).

4. The device according to one of the preceding claims 1 to 3, characterized in that the respective guide (8, 9) carries a fixed toothed profile, which engages with a drivable gearwheel to produce the rotatory motion.

5. The device according to claim 4, characterized in that the toothed profile is formed by a fixedly arranged roller chain (10, 11), and the gearwheel is formed by a chainwheel (12).

6. The device according to one of the preceding claims 1 to 5, characterized in that a brake mechanism (18) is provided to fix the tool carriage (13) under a working load, and engaged so as to be automatically released upon introduction of an adjustment motion.

7. The device according to one of the preceding claims 1 to 6, characterized in that the outer frame can be mounted on both opposing rails (2, 3) of a track (1) by wheels (4).

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