JPH1082006A - Removing device for deposited-metal extra-banking section of rail-joining welding section - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability by manufacturing a shearing-knife control cylinder and the girder material of a mounting frame for the control cylinder of strong steel or an aluminum alloy. SOLUTION: An extra-banking removing device is composed of a frame consisting of vertical girders 1, 2 and horizontal girders 3, 4, a moveble horizontal girder 6 guided by the girders 1, 2, piston-cylinder units 7, 8, in which end sections are combined with the girders 4, 6, shearing knifes 13, 14 installed to the girders 3, 6, etc. The knives 13, 14 surround the rail head of the deposited-metal extra-banking section of the rail-Joining welding section to be removed, and shear and machine the flank and travelling surface of at least the rail head. The girders 1, 2, 3, 4 and the units 7, 8 are manufactured of strong particulate steel and aluminum alloy, and the girder 6, the mounting plates 15, 16, 29, hold-down members 17, 18, hand grips 24, 25, a directional control valve 9, etc., are produced of the same material as required. Accordingly, the removing device can be lightened while being easily handled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The invention relates to a device of the type defined in the preamble of claim 1.

[0002]

2. Description of the Related Art As is well known, a joint weld between two rail ends located opposite to each other on a laying track is formed by depositing a solution-like deposited metal in a gap separating a rail end surrounded from the outside by a molding device. By supplying
It is very easily performed by the thermit method. in this case,
The solution deposited metal is formed by igniting a thermite solvent consisting of aluminum particles and iron oxide particles, in which case the iron oxide is reduced during the strong exothermic reaction, the slag containing aluminum oxide floats and Solution iron is cast into the gap. An advantage of this method, which is very important in real-world on-site processing, is that no external energy source is required to prepare the deposited metal in solution.

[0003] The space filled with the deposited metal is
It is limited by the mutually facing end faces of the rail ends and by a longitudinally divided forming device, which usually has at least one leg and a head feeder (· Steiger), and which covers the gap on both sides. You. However, in accordance with the profile of the rail end to be joined, a weld metal overfill (Schweissgutueberstaende) requiring post-processing occurs at least in the functional surface area of the rail head. A profile match of the deposited metal area to the part profile is desired. During the post-processing, at the same time, the feeder part (Steiger) having the target breaking point in the joint area with the rail profile must be removed.

[0004] For energy reasons, it is advantageous if the major part of the weld metal overburden is removed by shearing in the hot state, thus maintaining a certain dimensional error with respect to the rail head profile in the weld metal area. In addition, precision machining must be performed over the subsequent grinding process.

[0005] From DE-A-264 43 260, various types of devices are known which are suitable for carrying out the shearing process in view of the field conditions, that is to say on laying tracks, in which case a weld metal overfill is known. In order to remove the parts, shearing knives are provided on both sides of the weld metal overhang which can be moved toward and away from each other in a hydraulically scissor-like manner. In this case, a closed frame is provided to receive the reaction forces generated by the shearing process, and the frame is provided with two or more piston-cylinder units.

In this known arrangement, two stringers are provided which extend parallel to one another and which are joined by cross beams at the end, in which case one of the cross beams has two piston-cylinder units. Has been fixed. The piston rods of this piston-cylinder unit running parallel to one another support another movable crosspiece. The movable girder as well as the girder opposite the girder, which are fixed to the girder, each have a shearing knife adapted to the rail profile to be worked.

The stringers are configured as tubular or L-shaped guide members for the piston / cylinder unit, and both cross beams connecting the stringers are provided with holding members on both sides of the rail profile, respectively. The hold-down member is configured to engage the rail head from below, so that the vertical reaction force generated by the shearing process is reliably received by the rail profile. At the same time, the cutting height of the shearing knife is adjusted by the holding member.

For the operation of the device, additional equipment is provided for preparing the hydraulic medium under the required pressure. However, in this case, the additional equipment does not form a structural unit with the device. These components are usually made of steel, e.g. structural steel, since the girder and cross girder together with the working cylinder must be designed to receive high reaction forces depending on the thickness and temperature of the weld metal overlay to be sheared. Is done. However, this results in a relatively bulky machine configuration that is cumbersome to handle on site.

In the construction of the known device, the problem of weight reduction is also taken into account, but the measures taken are limited to changing the number of piston and cylinder units prepared for the shearing process. I have. However, this type of mass reduction is relatively narrowly limited due to the reaction forces predefined by the shearing process. Furthermore, in many cases the shearing process must take into account not only the weld metal fill in the rail head area, but also the weld metal fill and riser in the area of the other components of the rail profile.

In particular, there is a great need for the provision of a weld metal overfill shearing device with improved use characteristics in order to avoid physiological disturbances due to the continuous processing of relatively heavy masses.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device of the type described at the outset which can be designed in consideration of the operating characteristics, in particular the field conditions.

[0012]

The object is achieved according to the invention by a device according to the invention as set forth in the characterizing part of claim 1.

[0013]

What is important to the invention is that, in order to reduce the mass accordingly and to take advantage of the increased material strength compared to the materials used conventionally, the part defining the mass of the device is made of special material. For example, using a tough (fine grain) steel or aluminum alloy, such as F53.
The purpose of this measure is to facilitate the handling of the equipment, i.e. the transport, the placement of the equipment on the laying track to be processed and the subsequent removal of the equipment, thus reducing the burden on the personnel operating the equipment. is there.

Since, for example, the girder and the girder are made from the above-mentioned fine-grained steel and at least one piston-cylinder unit is made from an aluminum alloy, it is not absolutely necessary to make the whole device homogeneous in material. . However, a materially homogeneous configuration is advantageous. Therefore, according to the invention, the part defining the mass of the device is made of the above-mentioned tough special steel, as long as this is technically possible and cost-effective.

According to claim 2, the holding member, the holding grip and the U-shaped guide are made of a strong steel or aluminum alloy. This component corresponds to a component known per se from a structural and functional point of view. By making these components out of tough special steel, a further reduction in mass is obtained.

By means of the measures of claims 3 and 4, a further improvement in the use properties is obtained, as long as the safety risks which essentially exist are avoided. In relation to the pressure load of the piston that can be loaded on both sides, a pressure difference is created on both sides of the piston based on the different faces loaded by the pressure medium, and this pressure difference is such that the piston face is completely loaded on one side of the piston When the piston face opposite to the piston face which is provided and fully loaded is reduced by the cross-section of the piston rod, and a check valve arranged in the connection pipe to the tank is provided, When closed due to the connection, an unacceptable pressure build-up occurs in the space allocated to the reduced piston face. The pressure limiting valve used in this case ensures that such a pressure increase is avoided, in which case the opening pressure of the pressure limiting valve corresponds, for example, to the maximum allowed pressure, which is
Allowed in the connecting conduit between the directional control valve and the pressure generator. The directional control valve and the pressure limiting valve advantageously form, according to the invention, also a structural unit of substantially the same type of tough special steel.

The features of claims 5 and 6 define another measure for reducing the mass of the device. The holding member and the U-shaped guide are made from the tough material described above, which also applies to the mounting plate attached to the cross beam, which serves as a support for the holding member and the U-shaped guide. The mounting plate simultaneously exerts a reinforcing effect on the cross beam.

The features of claims 7 and 8 define the structural design of the device, in which substantially known components are used, which components are made from the tough materials mentioned at the outset. Be produced.

According to claims 9 and 10, the components to be connected to one another of the device are welded to one another if the components consist of tough steel. This is an advantageous type of connection. Of course, the components are provided with a retaining grip, a U-shaped guide and a guide mechanism for the holding member. If these components are made of a tough aluminum alloy, a screw connection is basically also taken into account, but in this case a tough steel is advantageously used and the components are welded.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS.

The device according to the invention has an outer rigid frame consisting of two stringers 1, 2 extending parallel to one another, said stringers being fixed on the end side at a fixed cross beam. They are connected to one another via 3,4. FIG. 3 and FIG.
As can be seen, the stringers 1, 2 are configured as L-shaped features and are arranged in the frame so as to face each other. The stringers 1 and 2 form guides for the movable transverse beam 6 which extend parallel to the transverse beams 3 and 4 in the direction of the longitudinal beam, ie in the direction of the arrow 5. All horizontal beams 3,
Reference numerals 4 and 6 designate plate-shaped members and the longitudinal beams 1, 2
Extending perpendicular to a basic plane including. The section of the movable crosspiece 6 facing the stringers 1 and 2 is designed in consideration of its engagement with the L-shaped formation of the stringer, so that it can be guided by the stringer in the movement in the direction of arrow 5. Function is exerted.

Strictly between these opposing sides of the movable cross beam 6 and the stationary cross beam 4, these edge regions include:
One piston-cylinder unit 7, 8 extends in each case. The respective cylinders of the piston-cylinder units 7, 8 are connected on the end face side to a movable cross beam 6 and the respective piston rods to a stationary cross beam 4. The piston-cylinder units 7, 8 are loadable on both sides and have a four-port, three-position, directional control valve 9 whose casing is designed in a suitable manner, not shown, in a piston-cylinder unit. It is fixed to cylinders 7 and 8. The directional control valve 9 is operable by means of a hand lever 10 and is connected via a connecting line (not shown) to a pressure generator having a tank, preferably a pump which can be driven electrically. The connection of the directional control valve 9 used for the connection of the pressure generator and the connecting conduit connected to the directional control valve are advantageously a quick-disconnect coupling element which shuts off the flow of the pressure medium when the connecting conduit is disconnected. It has a check valve.

The respective connecting conduits 11, 12 are arranged between the piston / cylinder units 7, 8 and the directional control valve 9 and selectively pressurize the piston / cylinder units in the direction of arrow 5 The movement of the cross beam 6 is produced.

The stationary cross beam 3 and the movable cross beam 6 have, on opposite sides, shearing knives 13, 14 which surround the rail head to be machined and at least have a flank of the rail head. And suitable for shearing in the area of the running surface. Since the shearing knives are advantageously detachably fixed to the crossbeam, different knife profiles are used, especially for shearing the weld metal excess in the railhead area and also for the feeder section. Also suitable for.

Each of the mounting plates 15 and 16 is
In the central area of the cross beams 3, 6, it is fixed on the side of the cross beam opposite to the shearing knife. The mounting plates 15, 16 extend substantially perpendicular to the plane of the cross beams 3, 6. The mounting plate 15 has a central section 15 'extending parallel to the basic plane defined by the stringers 1, 2,
In this case, on both sides of this central section 15 ', an identically designed section 1 bent over said basic plane
5 "and 15"'extend.

The mounting plate 16 is formed only from a central section 15 extending parallel to the basic plane.

The central section 15 'of the mounting plate 15 and the mounting plate 16 are likewise used for mounting holding members 17, 18 formed identically to one another.
Each mounting plate 15, 16 has a vertical central plane 19
Holding member 1 located at the same interval on different sides of
7,18 are assigned. The holding members 17, 18
It is used to grip the rail profile to be worked from below and thus to transmit the vertical reaction force generated by the shearing process to the rail profile.

Each of the holding members 17 and 18 comprises a screw pin 20 having a handgrip 21 at one upper end and a rail profile at the other lower end so as to grip the rail profile from below. A defined and configured holding element 22 is arranged. Each screw pin 20 is held in a guide cylinder 23 which extends perpendicularly to the central section 15 ′ or to the mounting plate 16, which is guided through a corresponding hole in said mounting plate 16. I have. Each guide cylinder 23 is provided with a threaded section at a suitable point, in this case a nut which is fixedly connected to this point and which engages the thread of the threaded pin, so that the rotation of the threaded pin causes the holding element 22 to move. It is raised and lowered relatively to the plane of the mounting plate 16.

The holding grips 24, 25 are fixed in a suitable manner to the outer surfaces of the stringers 1, 2 and are in particular welded to the strings 1, 2 and are used for transporting the device by hand.

The vertically extending legs 26 ', 26 "of the generally U-shaped member 26 form at their lower end a guide surface 27 which contacts the rail profile to be machined. The U-shaped member or U-shaped guide 26 is retained. For this purpose, a guide cylinder 28 is provided, which receives the side legs 26 ', 26 "and is itself arranged on a mounting plate 29,
9 is fixed on the side of the cross beam 4 facing the cross beam 6. The guide surfaces 28 extend below the mounting plate 18 because the guide cylinders 28 are arranged in alignment with the corresponding holes in the mounting plate 29.

The U-shaped member 26 can be fixed in a suitable manner in a guide cylinder 28.

The cross beams 3, 4 and 6 are each provided with a notch on the lower side symmetrically with respect to the vertical center plane 30, and the inner diameter of the notch is determined by the profile of the rail head 31 to be machined. Is designed to be large, so the rail head 3
During the shearing of No. 1, the vertical supporting force is directly
6 is not transmitted to the rail head 31.

As already mentioned, the piston-cylinder units 7, 8 can be loaded on both sides, in which case the directional control valve 9 is provided in a manner not shown in FIGS.
Connected to pressure generator. The pressure generator is usually equipped with a pressure limiting valve, for safety reasons, to protect the components of the pressure generator as well as the connecting lines to the directional control valve from mechanical overload. However, additional safety measures are taken into account in the pressure medium system of the device according to the invention. This will be described below with reference to FIG.

As shown in FIG. 5, connecting conduits 32, 33
Can be connected to the connecting lines 11, 12 via the directional control valve 9 according to the switching position of the directional control valve, in which case
A corresponding movement of the shearing knife 14 in the direction of arrow 5 results. In this case, the connecting conduit 32 is a pressure conduit, while the connecting conduit 33 is a return conduit.

The connecting lines 34, 35 are led to a pressure generator, in which case the connecting line 34 forms the pressure line and the connecting line 35 forms the return line to the tank. All connecting conduits 32 to 35 have check valves 36 at the ends facing each other.
And can be connected to each other via a connecting member (schematically shown) 37. In the respective uncoupled state, the end of the connecting line is closed via a check valve 36, so that an undesired outflow of the pressure medium is prevented. On the other hand, the connecting member 3
7 is formed so that the check valve does not function in the connected state.

The pressure limiting valve 38 is adjusted to a specified maximum pressure, in particular in relation to the characteristics of the directional control valve 9. The purpose of the pressure limiting valve 38 is to connect the check valve 36 at the end of the connecting lines 32, 33, the ends of the connecting lines 32, 33 being incorporated in the casing of the directional control valve 9. This will be described below.

During the shearing stroke of the shearing knife 14, the piston faces of the piston-cylinder units 7, 8 are completely loaded, in which case the pressure medium is connected via the connecting line 33 in the connection of the connecting line 35 according to the feed stroke. It is returned into the pressure generator tank. In this case, the maximum permissible pressure of the conduit system is defined by a safety valve associated with the pressure generator. If, for some reason, the connection between the connecting lines 33, 35 is still not available, so that the check valve 36 belonging to these connecting lines occupies a closed state, the piston and the connecting line 32 will be subjected to continuous pressure loading. Different pressures occur on both sides of the pistons of the cylinder units 7,8. This is because, on the side opposite to the piston surface on the pressure side, there is only the piston surface reduced by the cross section of the piston rod.

Therefore, in the connecting conduit functioning as the return conduit, a pressure is built up, including all parts which are regarded as return parts of the directional control valve, and this pressure is determined by the area ratio of the front and back sides of the effective piston face. It becomes higher than the pressure in the connection line 32 by a defined factor, which can cause mechanical damage, especially of the directional control valve 9, due to overload. In this case, via the pressure limiting valve 38, the connecting line 3
It is ensured that the pressure in the pressure medium 3 does not exceed a specified value, so that a predetermined maximum pressure, for example on the pressure generator side, is used as reference for all the conduit systems of the pressure medium. Local occurrences are prevented.

According to the invention, the girder 1,2, the girder 3,4 and the mounting plates 15,16,29 are made, for example, of strong fine-grained steel and are welded together. Similarly, a movable cross beam 6, holding members 17, 18,
The handgrips 24, 25, the U-shaped members 26 and the connecting conduits 11, 12 are produced. The directional control valve 9 is provided with the piston / cylinder units 7, 8 as a whole or at least in major part by a suitable aluminum alloy, for example F5
3, but can also be made as a whole or as a main part from strong steel.

To use the device, it is mounted on the rail head to be treated on both sides of the weld metal overlay to be sheared and fixed by adjustment of the holding members 17, 18, ie the holding element of the holding member 22 are fixed so as to grip the rail head from below on both sides of the central plane 19. In the vertical and lateral directions, the device is now supported by the shearing knives 13, 14 in connection with the U-shaped member 26. It is desired to shear the weld metal overlay to a height of 1 to 2 mm. In this case, the weld metal overburden is then cut off by grinding or another attrition. The holding members 17, 18 ensure that the shearing is effected up to the overfill.

The cross beam 6 is then moved by the pressure load of the piston and cylinder unit in the direction of the weld metal to be machined and comes into contact therewith, in which case the shearing knife 13 is driven by the subsequent extrusion of the piston and cylinder unit.
Is also pulled in the direction of the weld metal overlay. This movement and the subsequent shearing movement, which is characterized by the scissor-like mutual movement of the shearing knives 13, 14, which shear the weld metal overfill to said reserve, are carried out by the shearing knives 13, 13.
14 and the profile of the U-shaped member 26 while being guided laterally. After finishing the shearing process, the piston / cylinder units 7, 8 are
Is applied in the opposite direction and returned to the starting position shown.

The device according to the invention is distinguished by a very low mass and thus an improved manual operability compared to known designs. This can be achieved with material measures, using tough steel or a suitable aluminum alloy, but also with structural measures, i.e., the parts which are mechanically heavily loaded, e.g. It can also be obtained by sufficient reinforcement with a mounting plate mounted on the cross beam. Furthermore, the shearing knife is best guided along the rail profile to be machined, especially during its movement triggered by the piston-cylinder units 7,8. Furthermore, the device according to the invention can also take into account safety measures in connection with the control of the pressure medium, in which case unacceptably high pressures in the area of the directional control valve in the case of poor connection of the return line. Occurrence is avoided.

[Brief description of the drawings]

FIG. 1 is a plan view of an apparatus according to the present invention.

FIG. 2 is a side view of the device as viewed in the direction of arrow II in FIG.

FIG. 3 is a simplified front view of the device as seen in the direction of arrow III in FIG.

FIG. 4 is a front view of the device, showing the rail head to be machined, as viewed in the direction of arrow IV in FIG. 1;

FIG. 5 is a partial view of a hydraulic circuit attached to the device.

[Explanation of symbols]

 1, longitudinal stringer 9 directional control valve 13,14 shearing knife 3,4,6 transverse beam 7,8 piston / cylinder unit 13,16,29 mounting plate 17,18 holding member 19 central plane 24,25 holding grip 26U V-shaped guide 31 Rail head 34, 35 Connecting conduit 36 Check valve 38 Pressure limiting valve

Claims (10)

[Claims] An apparatus for removing a weld metal surplus portion of a rail / joint weld, comprising at least a rail head (3).
Two shearing knives (13, 14) operable with a pressure medium arranged to be used for shearing the weld metal overfill in the area of 1) with scissors, and stringers (1, 2) and A closed frame consisting of end crossbeams (3, 4) is provided, on which a shearing knife (13, 4) is attached.
14) and at least one piston-cylinder unit (7, 8) used for operating the shearing knife are arranged, one shearing knife (13) having a cross beam (3) facing the inside of the frame. On the side and the other shearing knife (14) is arranged on the side of the movable crosspiece (6) facing the crossbeam (3), the movable crosspiece (6) being at the same time the piston-cylinder unit ( 7, 8) and is movable relative to the frame, and the stringers (1, 2)
Is configured to be used as a guide mechanism for moving a cross beam (6) supporting a shearing knife (14), wherein the vertical beams (1, 2) and the horizontal beams (3, 4) are used.
And an apparatus for removing a weld metal excess portion of a rail / joint weld, wherein the piston / cylinder unit (7, 8) is made of a tough steel or aluminum alloy. 2. A holding member (17,1) used for gripping a rail head (31) from below in an engagement connection manner.
The device according to claim 1, characterized in that the U-shaped guide (26) used for gripping the rail head (31) from the side and the rail head (31) is made of a strong steel or aluminum alloy. 3. A piston / cylinder unit (7, 8).
Can be loaded on both sides, and the connection of the pressure medium conduit system or the directional control valve (9) of the device used to connect the pressure generator and the tank reaches the check valve (36). The non-return valve is connected to the pressure generator as well as to the connecting conduit (34, 35) guided to the tank.
Occupies the closed position in the uncoupled state of the directional control valve (9) and the piston / cylinder unit (7,
8) a pressure limiting valve (38) is provided for limiting the pressure difference between the connecting conduit functioning as a pressure conduit and the connecting conduit (32, 33) functioning as a return conduit; 3. The device according to claim 2, wherein (9) is made of at least substantially tough steel or aluminum alloy together with the pressure limiting valve (38). 4. The pressure limiting valve (38) is a directional control valve (9).
4. The device according to claim 3, wherein the structural unit is integrated with the frame to form a structural unit, the structural unit being fixedly connected to the frame. 5. A holding member (17, 18) is provided, wherein the holding member (17, 18) is provided with a shearing knife (13, 1).
4) arranged on different sides of a vertical central plane (19), a U-shaped guide (26) is arranged adjacent to the stationary cross beam (4), and a holding member (17). , 18) and U-shaped guide (26)
5. The device according to claim 2, wherein the device is made of a tough steel or aluminum alloy. 6. A mounting plate (13, 14, 2) extending substantially perpendicularly to the plane of the cross beam (3, 4, 6).
9) are provided, and the mounting plates (13, 14, 29) respectively form supports for the holding members (17, 18) and the U-shaped guide (26), and the mounting plates (13, 14, Device according to claim 5, characterized in that 29) is made of a tough steel or aluminum alloy. 7. The stringers (1, 2) have an L-shaped configuration, and the inner surfaces of the legs of the L-shaped columns (1, 2), which are arranged opposite to each other, are provided. 7. The device as claimed in claim 1, wherein the device comprises a guide surface for a movable cross beam. 8. A fixed cross beam (4) and a movable cross beam (6).
Two piston-cylinder units (11, 12), which are commonly controllable via a directional control valve (9), are connected to the lateral edge regions of the piston-cylinder units, The part relatively movable with respect to the stationary cross beam (4) is operatively connected to the guide surface of the stringer (1, 2), and the shearing knife is symmetrical with respect to a vertical central plane (19). 8. Device according to claim 7, characterized in that a (13, 14) and a U-shaped guide member (26) are arranged. 9. Stringers (1,2) made from tough steel
, Fixed cross beams (3, 4) and mounting plates (15,
Device according to any one of claims 6 to 8, characterized in that a weld joint is provided between the device and (29). 10. A weld joint between a movable crosspiece (6) made of tough steel and a mounting plate (15, 29). The device according to any one of the preceding claims.