CA1116997A - Transportable device for the removal of projecting excess weld material in rail joint-welding - Google Patents
Transportable device for the removal of projecting excess weld material in rail joint-weldingInfo
- Publication number
- CA1116997A CA1116997A CA000286677A CA286677A CA1116997A CA 1116997 A CA1116997 A CA 1116997A CA 000286677 A CA000286677 A CA 000286677A CA 286677 A CA286677 A CA 286677A CA 1116997 A CA1116997 A CA 1116997A
- Authority
- CA
- Canada
- Prior art keywords
- cylinders
- shearing
- weld material
- frame
- cross beams
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
- E01B31/02—Working rail or other metal track components on the spot
- E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
- E01B31/15—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by planing or filing
Abstract
TRANSPORTABLE DEVICE FOR THE REMOVAL OF PROJECTING
EXCESS WELD MATERIAL IN RAIL JOINT-WELDING
Abstract of the Disclosure This invention relates to an improvement in a portable device for the removal, down to the profile, of projecting excess weld material in rail joint-welding on laid track by a fluid operated cutting tool, the shearing blades of which are mounted so at least one can move towards the other in a pincer-like manner, the improvement comprising frame means which absorb reaction forces arising during the shearing opera-tion.
EXCESS WELD MATERIAL IN RAIL JOINT-WELDING
Abstract of the Disclosure This invention relates to an improvement in a portable device for the removal, down to the profile, of projecting excess weld material in rail joint-welding on laid track by a fluid operated cutting tool, the shearing blades of which are mounted so at least one can move towards the other in a pincer-like manner, the improvement comprising frame means which absorb reaction forces arising during the shearing opera-tion.
Description
~16997 This invention relates to a portable device for the removal, according to the profile, of projecting excess weld material in rail joint-weldîng on laid track by a fluid operated cutting tool, the shearing blades of which are arranged so that they can move towards one another like pincers.
A device is known from German Patent No. 1,502,758 issued April 28, 1970 to Elektro-Thermit GmbH, for the removal, down to the profile, of projecting excess weld material in rail joint-welding, in which a hydraulically operated cutting tool and a pressure fluid accumulator are provided and removal-of the particular pro;ecting excess weld material is effected by the cutting tool as the result of a single release of the loaded pressure fluid accumulator.
In this case, the necessary force in the longitudinal d~rection of the rail can be applied by pressure cylinders located parallel to the rail. For this, the device is support-ed on wedges on the rail.
It is a disadvantage of this device that pressure cylinders with a large stroke are required, because the shear-ing blades must be pressed completely through the pro~ectingexcess weld material. In addition, it is a disadvantage that, specifically because of its shape, the shearing blade is directed on the side of the head of the rail, but~not'in the vertical direction. Because of this, the blade does not cut off the pro~ecting excess weld material on the running surface of the rail in a defined manner, so that too much pro~ecting material still can remain on the head of the rail. In addition the device must be designed in such a way that it can be attached onto the rail so that the necessary forces can be transmitted.
As a fur~her development of this state of the art a device was developed in which the removal of the pro~ecting excess weld material is effected by the pincer-like movement 9~
towards each otller of two cutting tools. Ihis device is the subject of German Patent No. 2,263,773 issued November 13, 1975 to Elektro-Thermit GmbH. In this device, on two cylinders arranged parallel to the longitudinal axis of the rail, a cross beam is fastened, with a shearing blade, adapted to the rail profile, fixed to it and at the ends of the piston rods of the two cylinders, which pass through bores in the cross beam, via a further cross beam, a second shearing blade is fastened in the direction of the projecting excess weld material and the first shearing blade. If, in this device, pressure is applied to the hydraulic cylinder, the shearing blade, which is fastened to the cross beam located at the ends of the piston rods of the two cylinders, is pulled in the direction of the weld bead until the shearing blade comes into contact with the weld bead. Upon further application of pressure to the cylinder, the cross beam connected to the cylinders is now likewise pulled, although in the reverse direction, in the direction of the weld bead until this shearing blade also rests on the weld bead. Upon further increase of pressure, the two shearing blades cut off the weld bead in a pincer-like manner.
This device has proved useful in operation on build-ing sites bu~ has shown in practical use that a further saving in weight in this device would be desirable, and, in addition, ; that the hydraulically produced pressure needed for the shearing should be maintained as low as possible in order to be able to keep the auxiliary equipment, for the production of the hydraulic pressure, also small. Limits, however, were set to such improvements in that the hydraulic pressure could not act upon the entire surface of the pistons sliding in the cylinders but only upon the circular ring surface of the pistons, because the pressure acted from that side of the piston upon which the piston rod is fastened to the piston. With this construction, however, a reversal of the pressure application was not possible.
A device is known from German Patent No. 1,502,758 issued April 28, 1970 to Elektro-Thermit GmbH, for the removal, down to the profile, of projecting excess weld material in rail joint-welding, in which a hydraulically operated cutting tool and a pressure fluid accumulator are provided and removal-of the particular pro;ecting excess weld material is effected by the cutting tool as the result of a single release of the loaded pressure fluid accumulator.
In this case, the necessary force in the longitudinal d~rection of the rail can be applied by pressure cylinders located parallel to the rail. For this, the device is support-ed on wedges on the rail.
It is a disadvantage of this device that pressure cylinders with a large stroke are required, because the shear-ing blades must be pressed completely through the pro~ectingexcess weld material. In addition, it is a disadvantage that, specifically because of its shape, the shearing blade is directed on the side of the head of the rail, but~not'in the vertical direction. Because of this, the blade does not cut off the pro~ecting excess weld material on the running surface of the rail in a defined manner, so that too much pro~ecting material still can remain on the head of the rail. In addition the device must be designed in such a way that it can be attached onto the rail so that the necessary forces can be transmitted.
As a fur~her development of this state of the art a device was developed in which the removal of the pro~ecting excess weld material is effected by the pincer-like movement 9~
towards each otller of two cutting tools. Ihis device is the subject of German Patent No. 2,263,773 issued November 13, 1975 to Elektro-Thermit GmbH. In this device, on two cylinders arranged parallel to the longitudinal axis of the rail, a cross beam is fastened, with a shearing blade, adapted to the rail profile, fixed to it and at the ends of the piston rods of the two cylinders, which pass through bores in the cross beam, via a further cross beam, a second shearing blade is fastened in the direction of the projecting excess weld material and the first shearing blade. If, in this device, pressure is applied to the hydraulic cylinder, the shearing blade, which is fastened to the cross beam located at the ends of the piston rods of the two cylinders, is pulled in the direction of the weld bead until the shearing blade comes into contact with the weld bead. Upon further application of pressure to the cylinder, the cross beam connected to the cylinders is now likewise pulled, although in the reverse direction, in the direction of the weld bead until this shearing blade also rests on the weld bead. Upon further increase of pressure, the two shearing blades cut off the weld bead in a pincer-like manner.
This device has proved useful in operation on build-ing sites bu~ has shown in practical use that a further saving in weight in this device would be desirable, and, in addition, ; that the hydraulically produced pressure needed for the shearing should be maintained as low as possible in order to be able to keep the auxiliary equipment, for the production of the hydraulic pressure, also small. Limits, however, were set to such improvements in that the hydraulic pressure could not act upon the entire surface of the pistons sliding in the cylinders but only upon the circular ring surface of the pistons, because the pressure acted from that side of the piston upon which the piston rod is fastened to the piston. With this construction, however, a reversal of the pressure application was not possible.
- 2 -~16~97 The object on which the invention is based i~, now, to provide a sheari.ng device which makes it possible to work with pressure cylinders of the smallest possible dimensions and to enable pressure to be applied to the en-tire piston surface without having to abandon the principle of pincer-like shearing.
This object is achieved according to the invention when the device has a closed, rigid frame which takes up the reaction forces arising during the shearing operation.
The reaction forces act in this case, in particular, upon the cross beams of the frame, and, depending on the embodi-ment of the device according to the invention, either the cylinders are connected to the cross beams, and the pistons with the piston rods move with respect to the cross beam or, in a different embodiment, the piston rods are connected to the cross beams, and the cylinders move with respect to this cross beam.
Broadly speaking, therefore, the present invention provides in a portable device for the removal, down to the profile, ~f projecting excess weld material in rail joint-welding on laid track by a fluid operated cutting tool, the shearing blade means of which are mo~lnted so at least one can move towards the other in a pincer-like manner, the improvement comprising frame means which absorb reaction forces arising during the shearing operation, the frame means being composed of longitudinal members connected by cross beams, at least one fluid device connected to one o:E the cross beams, and blade means on the fluid device and adapted to be reciprocated thereby, whereby the blade means can be guided into the pro-jecting excess weld material and shear off the material down to the rail profile.
In one embodiment of the invention, two hydraulic devices opposite each other and each equipped with a shearing _3_ ~L6~1~7 blade are provided on a frame. For reasons of better guiding of the shearing blade it is recommended that each of the two hydraulic devices be equipped with two cylinders, the pistons sliding in the cylinders being rigid]y connected, via their piston rods, to a cross beam which, relative to the cross beam of the frame, is smal]er.
This device accordingly can be constructed in such a way that two hydraulic cylinders are located opposite each other on each of the two cross beams of the rigid frame, the piston rods of the two cylinders lying adjacent to each o-ther being connected by means of a cross beam. The cylinders on their part are frlctionally connected in each case to one of the two cross bea~s of the frame.
~16997 The two shearing blades are fastened opposite each other on the short cross beams which each connect the two connecting rods to-gether. If pressure is now applied to the cylinclers, the cross beams located on the piston rods, together with the shearing blades, move towards each other and shear off the projecting excess weld material.
The hydraulic pressure acts in this case on the entire surface of the particular hydraulic piston in the cylinder. By the use of four cylinders the hydraulic pressure needed for the shearing-off is, in addition, correspondingly reduced to 1/4. According to the invention, the reac-tion forces in this device arising during the shearing operation are taken up by the frame, upon which the pressure cylinders are supported against the two cross beams, and which pass the reaction forces into the two longitudinal members connectiny the two cross beams.
For a further saving in weight it is also possible to manage with a lower number of pressure cylinders by fastening one of the two shearing blades to the cross beam, opposite the other shearing blade, which, in turn, is located on one of the cross bcams connecl:lng the two piston rods of the two pressure cylinders. Thls device thus corre~
sponds to the device described above but with half the number oE pres-sure cylinders. The mode of action of this device differs from that of the device described above to the extent that upon application of pres-sure to the two cylinders, the cutting edge of the shearing blade, which is connected to the hydraulic device, is first guided into the weld bead.
Upon further application of pressure, the force needed to pull the entire frame, with the shearing blade located on the cross beam of the frame, towards the weld bead, is now less than the force needed for the shearing. If the shearing blade joined to the piston rods of the hydrau-lic device thus has now c~me into contact with the weld bead, the shearing blade located on the cross beam of the frame, is pulled towards , the opposite side of the weld bead. The pressure needed for the shear-ing now builds up on the cutting edges of the two shearing blades which then shear off -the vveld bead in a pincer-like counter movement.
Whereas with the above-mentioned device with only two hy-draulic cylinders the design in which the two cylinders are securely connected to a cross beam of the frame has been described, a techni-cally equivalent solution is possible of such design that the two piston rods are connected to the cross beams of the frame, and the application of pressure to the cylinder surfaces is effected in such a manner that the two cylinders, which are joined together by a cross member having a shearing blade, are moved in the direction of the other shearing blade.
The closed, rigid frame which takes up the reaction forces can, as already discussed, be composed of two cross beams and two longi-tudinal members rigidly joining these cross beams . It is also possible, however, especially for saving weight, to includ~ the cylinder walls in the frame. The frame, for example, in a device which has four cylinders and in which two cylinders in each case lie opposite e~ch other, then comprises the outer walls of the four cyllnders, the two cylinders which lie opposite each other being rigidly connected to one another by two longitudinal members, and the two adjacent cylinders each being rigidty connected to one another by short cross beams. With a device having only two pressure cylinders the Erame can be composed of a U-shaped frame member, the two ends of the U being rigidly fast-ened to the cylinder walls and the two adjacent cylinders being like-wise joined rigidly together by a short cross beam.
A further particularly preferred embodiment of the device accord-ing to the invention is composed, depending upon the type of device, of two or four hydraulic cylinders, mounted so that they can slide, in .
~16997 the longitudinal members collnecting the cross beams. In this device, the two piston rods are thus rigidly fastened to the cross beam. The shearing blade is moved by a relative move-ment, with respect to the frame of the two cylinders joined together, in the direction of the second shearing blade. The two longitudinal members of the frame thereby have not only the function of taking up the reaction forces but the additional task of guiding the two cylinders which can be moved relative to the frame. For this, the longitudinal members must have an appropriate profile, and for reasons of a perfect guiding it is preferred that these longitudinal members be constructed as sliding tubes. The sliding distance of the cylinder in these sliding tubes can be limited by dogs which are guided in guide slots in the sliding tubes.
The longitudinal members of the frame can have the form of carrying brackets or preferably of carrying brackets on either side. A machine for shearing off beads on rails joined by welding is indeed already known from U.S. Patent No.
This object is achieved according to the invention when the device has a closed, rigid frame which takes up the reaction forces arising during the shearing operation.
The reaction forces act in this case, in particular, upon the cross beams of the frame, and, depending on the embodi-ment of the device according to the invention, either the cylinders are connected to the cross beams, and the pistons with the piston rods move with respect to the cross beam or, in a different embodiment, the piston rods are connected to the cross beams, and the cylinders move with respect to this cross beam.
Broadly speaking, therefore, the present invention provides in a portable device for the removal, down to the profile, ~f projecting excess weld material in rail joint-welding on laid track by a fluid operated cutting tool, the shearing blade means of which are mo~lnted so at least one can move towards the other in a pincer-like manner, the improvement comprising frame means which absorb reaction forces arising during the shearing operation, the frame means being composed of longitudinal members connected by cross beams, at least one fluid device connected to one o:E the cross beams, and blade means on the fluid device and adapted to be reciprocated thereby, whereby the blade means can be guided into the pro-jecting excess weld material and shear off the material down to the rail profile.
In one embodiment of the invention, two hydraulic devices opposite each other and each equipped with a shearing _3_ ~L6~1~7 blade are provided on a frame. For reasons of better guiding of the shearing blade it is recommended that each of the two hydraulic devices be equipped with two cylinders, the pistons sliding in the cylinders being rigid]y connected, via their piston rods, to a cross beam which, relative to the cross beam of the frame, is smal]er.
This device accordingly can be constructed in such a way that two hydraulic cylinders are located opposite each other on each of the two cross beams of the rigid frame, the piston rods of the two cylinders lying adjacent to each o-ther being connected by means of a cross beam. The cylinders on their part are frlctionally connected in each case to one of the two cross bea~s of the frame.
~16997 The two shearing blades are fastened opposite each other on the short cross beams which each connect the two connecting rods to-gether. If pressure is now applied to the cylinclers, the cross beams located on the piston rods, together with the shearing blades, move towards each other and shear off the projecting excess weld material.
The hydraulic pressure acts in this case on the entire surface of the particular hydraulic piston in the cylinder. By the use of four cylinders the hydraulic pressure needed for the shearing-off is, in addition, correspondingly reduced to 1/4. According to the invention, the reac-tion forces in this device arising during the shearing operation are taken up by the frame, upon which the pressure cylinders are supported against the two cross beams, and which pass the reaction forces into the two longitudinal members connectiny the two cross beams.
For a further saving in weight it is also possible to manage with a lower number of pressure cylinders by fastening one of the two shearing blades to the cross beam, opposite the other shearing blade, which, in turn, is located on one of the cross bcams connecl:lng the two piston rods of the two pressure cylinders. Thls device thus corre~
sponds to the device described above but with half the number oE pres-sure cylinders. The mode of action of this device differs from that of the device described above to the extent that upon application of pres-sure to the two cylinders, the cutting edge of the shearing blade, which is connected to the hydraulic device, is first guided into the weld bead.
Upon further application of pressure, the force needed to pull the entire frame, with the shearing blade located on the cross beam of the frame, towards the weld bead, is now less than the force needed for the shearing. If the shearing blade joined to the piston rods of the hydrau-lic device thus has now c~me into contact with the weld bead, the shearing blade located on the cross beam of the frame, is pulled towards , the opposite side of the weld bead. The pressure needed for the shear-ing now builds up on the cutting edges of the two shearing blades which then shear off -the vveld bead in a pincer-like counter movement.
Whereas with the above-mentioned device with only two hy-draulic cylinders the design in which the two cylinders are securely connected to a cross beam of the frame has been described, a techni-cally equivalent solution is possible of such design that the two piston rods are connected to the cross beams of the frame, and the application of pressure to the cylinder surfaces is effected in such a manner that the two cylinders, which are joined together by a cross member having a shearing blade, are moved in the direction of the other shearing blade.
The closed, rigid frame which takes up the reaction forces can, as already discussed, be composed of two cross beams and two longi-tudinal members rigidly joining these cross beams . It is also possible, however, especially for saving weight, to includ~ the cylinder walls in the frame. The frame, for example, in a device which has four cylinders and in which two cylinders in each case lie opposite e~ch other, then comprises the outer walls of the four cyllnders, the two cylinders which lie opposite each other being rigidly connected to one another by two longitudinal members, and the two adjacent cylinders each being rigidty connected to one another by short cross beams. With a device having only two pressure cylinders the Erame can be composed of a U-shaped frame member, the two ends of the U being rigidly fast-ened to the cylinder walls and the two adjacent cylinders being like-wise joined rigidly together by a short cross beam.
A further particularly preferred embodiment of the device accord-ing to the invention is composed, depending upon the type of device, of two or four hydraulic cylinders, mounted so that they can slide, in .
~16997 the longitudinal members collnecting the cross beams. In this device, the two piston rods are thus rigidly fastened to the cross beam. The shearing blade is moved by a relative move-ment, with respect to the frame of the two cylinders joined together, in the direction of the second shearing blade. The two longitudinal members of the frame thereby have not only the function of taking up the reaction forces but the additional task of guiding the two cylinders which can be moved relative to the frame. For this, the longitudinal members must have an appropriate profile, and for reasons of a perfect guiding it is preferred that these longitudinal members be constructed as sliding tubes. The sliding distance of the cylinder in these sliding tubes can be limited by dogs which are guided in guide slots in the sliding tubes.
The longitudinal members of the frame can have the form of carrying brackets or preferably of carrying brackets on either side. A machine for shearing off beads on rails joined by welding is indeed already known from U.S. Patent No.
3,597,958 issued August 10, 1971 to Rock-Mill, Inc. In this device, however, there are two frames which can be slid into one another and can be coupled together. The main ob~ect of this device resides in reducing, by compression, the expansion, relative to the longitudinal direction of the rails, of the Xighly heated welded points in the rail by the application of compressive forces, and only then to shear off the welded bead.
This compression is effected by coupling together the two frames which can move relative to one another so that no relative movement ls possible. In the rigid frame produced in this manner, two compression members engage with each other in a pincer-like manner and reduce the cross-section of the weld point in the rail, as well as the thickness of the weld bead.
In a second operation, the two frames are now uncoupled and the outer of the two frames is clamped 6~3197 against the rail. In the shearing off of the weld bead which now fol-lows, there is no pincer-like movement but, supported against the rail, a cutting through of the weld bead in one direction with a shearing blade. The device is not suitable for use in shearing-off weld beads on laid jtrack. It is a large and relatively expensive device. Because of the mutual engagemen-t of the two frames and the releasable clamp-ing mechanisms, the device requires an extensive controlling means.
It has the additional disadvantage that no pincer-like cuts are made in the actual shearing operation, but again the cut is a sliding cut in a single direction, which results in tensional stresses being introduced in the weld point and a danger of cracks forming in the clamping area because the entire device is clamped to the rail.
Figures 1 through 5 illustrate embodiments of the device accord-ing to the invention, and Figures 6 and 7 show an embodiment of a constructional design according to Figure 3.
In Figures 1 through 5 the place where the prcssure is applied is indicated in each case by F.
Figure 1 shows a device with four hydraulic cylinders which are arranged in a rectangular frame. The frame is composed of two longi-tudinal members 1 and 2, and two cross beams 3 and 4 joining the longihldinal members. The two hydraulic cylinders 5 and 6 are fasten-ed to the cross beam 3 and the two hydraulic cylinders 7 and 8 are fastened to the cross beam 4. The pistons, with piston rods, sliding in the cylinders 5 and 6 and 7 and 8 are in each case joined togethnr by means of the corresponding cross beams 9 and 10. The shearing blades 11 and 12 are located opposite each other on the cross beams 9 and 10. Upon application of pressure to the four hydraulic ~16~97 cylinders, the pistons are moved in the cylinders in the direction of the center of the frame, the shearing blades 11 and 12 slide towards each other and shear off the projecting excess weld material.
Figure 2 shows a simplified embodiment of the device accord-ing to the invention with only two hydraulic cylinders arranged parallel to each other in a rectangular frame. The frame is composed of the longitudinal members 13 and 14 and two cross beams 15 and 16 joining the longitudinal members. The two hydraulic cylinders 17 and 18 are fastened to the cross beam 15, and a shearing blade 19 is fastened to the cross beam 16. The two piston rods of the hydraulic cylinders are again joined at their ends to a cross beam 20 which has a shearing blade 21.
As already described, upon application of pressure to the cyl-' inders, the shearing blade 21 first moves untLl it makes contact with the projecting excess weld material. Then the shearing blade 19 is likewise moved in the direction of the projecting excess weld material until it makes contact. Now the pressure needed to shear off the pro-jecting marerial is built up and the projecting exc.ess weld material is sheared off.
In Figure 3 a device similar to that in Figure 2 is illustrated, but in this case the ends of the piston rods of the hydraulic cylinders 17 and 18 are joined to the cross beam 15 and the cylinders are joined to the cross beam 20 carrying the shearing blade 21. The relative ; movement of the frame to the cylinders occurs in an analogous manner to that in the device shown in Figure 2.
It is of course also possible to provide in place of two hydraulic cylinders 17 and 18 only one hydraulic cylinder which is then arranged above the rail and parallel to the longitudinal axis thereof. If the cylinder is rigidly joined to the cross beam 15, the shearing blade 21 is then driven by the piston rod of the cylinder, or the shearing blade is fastened to the base of the cylinder if, corresponding to Figure 3, the piston rod is securely connected to the cross beam 15 . This device has the advantage of reducing the weight to the greatest possible extent. Driving the shearing blade with two pistons is, however, to be preferred because of more accurate guiding and because the requisite pressure is reduced as a result of the increase in the piston surface area. However, it is also possible to choose the converse method of construction and to provide the device with, for example, four cylinders, two cylinders in each case being arranged parallel, adjacent to one another and above one another, and the piston rods forming the corner points, for example of a rectangle. The four piston rods in the design according to Figure 2 or the four cylinder bases in the design according to F'igure 3 are rigidly joined to the cross beam 20 and drive the shear-ing blade 21. This device is to be preferred in particular when only hydraulic units which can c~evelop a relatively low pressure are avail-able, or also when the entire projectiny excess weld material on the head and web as well as at the base is to be sheared off, and when greater forces are required ~or this purpose.
Figures ~ and 5 show devices according to the invention in which the cylinder walls of the hydraulic cylinders are an integral part of the frame. In the device of F'igure 4 this frame is formed by the two longitudinal members 22 and 23, the cylinder walls 24, 25, 26, and 27, and the cross beams 28 and 29 each joining two cylinders. The further construction and mode of action of the device corresponds to that in Figure 1.
3~7 In Figure 5 the frame is formed from the U-shaped part of the frame, composed of the longitudinal members 30 and 31 and the cross beam 32, the cylinder walls 33 and 34 and the cross beam 35 joining the two cylinder bases. The mode of action of the device according to Figure 5 corresponds to the mode of action of the device according to Figure 2.
Figure 6 shows a side view and Figure 7 a plan view of an embodiment of a constructional design according to Figure 3, in which the longitudinal members 13 and 14 are constructed as tubular guide members for the cylinders 17 and 18. The two cross beams 15 and 16 are joined to the guide tubes 13 and 14. The two cylinders 17 and 18, joined to the cross beam 20, slide in the guide tubes. The ends of the piston rods of the hydraulic cylinders 17 and 18 are bolted tothe cross beam 15. The two shearing blades 19 and 21 are fastened to the two cross beams 16 and 20.
The two guide tubes 13 and 14 have openings 36 and 37 in which the tube connections 38 and 39 for the feed of hydraulic fluid move.
Located on the cross beams 15 and 16 are movable hold-down clamps 40, provided with handles, which hold down and guide the device dur-ing the shearing operation. The handles 41 of the hold-down clamps 40 serve at the same time for transporting, as well as for setting up and removing, the entire device.
If now, after setting up the device on the rail, with the shearing blades separated from each other, and the projecting excess weld material located between the blades, and after sliding the hold-down .,j clamps 40 under the head of the rail, hydraulic fluid is supplied to the two cylinders 17 and 18 via the tube connections 38, the two cylinders, and hence the cross beam 20 carrying the shearing blade 21, is pushed il~69~7 sufficiently far for the shearing blade to make contact with the project-ing excess weld material. With further build-up of pressure, the entire frame is now pulled in the opposite direction so that the shearing blade 19 is now brought up to the other side of the projecting excess weld materia I .
With further increasing pressure in the cylinders, the pincer-like shea.ing-off of the projecting excess weld material now occurs, with or without limitation of the stroke. Upon completion of the shearing-off operation, pressure is applied, via the tube connections 39, to the piston surfaces which are decreased by the cross-section of the piston rods, so that the cutting blades are moved back to their initial position.
After the hold-down clamps 40 have been pulled back, the device is -now lifted from the rail and can be immediately used for shearing off the next pro~ecting e~xcess weld material. Shearing off projecting ex-cess weld material with such a device, from the setting up of the device to its removal, can take place in less than one minute. The device according to the invention ensures easy handling and rapid resetting with rapid, and at the same time, reliable, shearing off of the project-ing excess weld material.
It will be obvious to those skilled in the art that many modifi-cations may be made within the scope of the present invention without departing from the spirit thereof, and the invention includes all such modifications .
This compression is effected by coupling together the two frames which can move relative to one another so that no relative movement ls possible. In the rigid frame produced in this manner, two compression members engage with each other in a pincer-like manner and reduce the cross-section of the weld point in the rail, as well as the thickness of the weld bead.
In a second operation, the two frames are now uncoupled and the outer of the two frames is clamped 6~3197 against the rail. In the shearing off of the weld bead which now fol-lows, there is no pincer-like movement but, supported against the rail, a cutting through of the weld bead in one direction with a shearing blade. The device is not suitable for use in shearing-off weld beads on laid jtrack. It is a large and relatively expensive device. Because of the mutual engagemen-t of the two frames and the releasable clamp-ing mechanisms, the device requires an extensive controlling means.
It has the additional disadvantage that no pincer-like cuts are made in the actual shearing operation, but again the cut is a sliding cut in a single direction, which results in tensional stresses being introduced in the weld point and a danger of cracks forming in the clamping area because the entire device is clamped to the rail.
Figures 1 through 5 illustrate embodiments of the device accord-ing to the invention, and Figures 6 and 7 show an embodiment of a constructional design according to Figure 3.
In Figures 1 through 5 the place where the prcssure is applied is indicated in each case by F.
Figure 1 shows a device with four hydraulic cylinders which are arranged in a rectangular frame. The frame is composed of two longi-tudinal members 1 and 2, and two cross beams 3 and 4 joining the longihldinal members. The two hydraulic cylinders 5 and 6 are fasten-ed to the cross beam 3 and the two hydraulic cylinders 7 and 8 are fastened to the cross beam 4. The pistons, with piston rods, sliding in the cylinders 5 and 6 and 7 and 8 are in each case joined togethnr by means of the corresponding cross beams 9 and 10. The shearing blades 11 and 12 are located opposite each other on the cross beams 9 and 10. Upon application of pressure to the four hydraulic ~16~97 cylinders, the pistons are moved in the cylinders in the direction of the center of the frame, the shearing blades 11 and 12 slide towards each other and shear off the projecting excess weld material.
Figure 2 shows a simplified embodiment of the device accord-ing to the invention with only two hydraulic cylinders arranged parallel to each other in a rectangular frame. The frame is composed of the longitudinal members 13 and 14 and two cross beams 15 and 16 joining the longitudinal members. The two hydraulic cylinders 17 and 18 are fastened to the cross beam 15, and a shearing blade 19 is fastened to the cross beam 16. The two piston rods of the hydraulic cylinders are again joined at their ends to a cross beam 20 which has a shearing blade 21.
As already described, upon application of pressure to the cyl-' inders, the shearing blade 21 first moves untLl it makes contact with the projecting excess weld material. Then the shearing blade 19 is likewise moved in the direction of the projecting excess weld material until it makes contact. Now the pressure needed to shear off the pro-jecting marerial is built up and the projecting exc.ess weld material is sheared off.
In Figure 3 a device similar to that in Figure 2 is illustrated, but in this case the ends of the piston rods of the hydraulic cylinders 17 and 18 are joined to the cross beam 15 and the cylinders are joined to the cross beam 20 carrying the shearing blade 21. The relative ; movement of the frame to the cylinders occurs in an analogous manner to that in the device shown in Figure 2.
It is of course also possible to provide in place of two hydraulic cylinders 17 and 18 only one hydraulic cylinder which is then arranged above the rail and parallel to the longitudinal axis thereof. If the cylinder is rigidly joined to the cross beam 15, the shearing blade 21 is then driven by the piston rod of the cylinder, or the shearing blade is fastened to the base of the cylinder if, corresponding to Figure 3, the piston rod is securely connected to the cross beam 15 . This device has the advantage of reducing the weight to the greatest possible extent. Driving the shearing blade with two pistons is, however, to be preferred because of more accurate guiding and because the requisite pressure is reduced as a result of the increase in the piston surface area. However, it is also possible to choose the converse method of construction and to provide the device with, for example, four cylinders, two cylinders in each case being arranged parallel, adjacent to one another and above one another, and the piston rods forming the corner points, for example of a rectangle. The four piston rods in the design according to Figure 2 or the four cylinder bases in the design according to F'igure 3 are rigidly joined to the cross beam 20 and drive the shear-ing blade 21. This device is to be preferred in particular when only hydraulic units which can c~evelop a relatively low pressure are avail-able, or also when the entire projectiny excess weld material on the head and web as well as at the base is to be sheared off, and when greater forces are required ~or this purpose.
Figures ~ and 5 show devices according to the invention in which the cylinder walls of the hydraulic cylinders are an integral part of the frame. In the device of F'igure 4 this frame is formed by the two longitudinal members 22 and 23, the cylinder walls 24, 25, 26, and 27, and the cross beams 28 and 29 each joining two cylinders. The further construction and mode of action of the device corresponds to that in Figure 1.
3~7 In Figure 5 the frame is formed from the U-shaped part of the frame, composed of the longitudinal members 30 and 31 and the cross beam 32, the cylinder walls 33 and 34 and the cross beam 35 joining the two cylinder bases. The mode of action of the device according to Figure 5 corresponds to the mode of action of the device according to Figure 2.
Figure 6 shows a side view and Figure 7 a plan view of an embodiment of a constructional design according to Figure 3, in which the longitudinal members 13 and 14 are constructed as tubular guide members for the cylinders 17 and 18. The two cross beams 15 and 16 are joined to the guide tubes 13 and 14. The two cylinders 17 and 18, joined to the cross beam 20, slide in the guide tubes. The ends of the piston rods of the hydraulic cylinders 17 and 18 are bolted tothe cross beam 15. The two shearing blades 19 and 21 are fastened to the two cross beams 16 and 20.
The two guide tubes 13 and 14 have openings 36 and 37 in which the tube connections 38 and 39 for the feed of hydraulic fluid move.
Located on the cross beams 15 and 16 are movable hold-down clamps 40, provided with handles, which hold down and guide the device dur-ing the shearing operation. The handles 41 of the hold-down clamps 40 serve at the same time for transporting, as well as for setting up and removing, the entire device.
If now, after setting up the device on the rail, with the shearing blades separated from each other, and the projecting excess weld material located between the blades, and after sliding the hold-down .,j clamps 40 under the head of the rail, hydraulic fluid is supplied to the two cylinders 17 and 18 via the tube connections 38, the two cylinders, and hence the cross beam 20 carrying the shearing blade 21, is pushed il~69~7 sufficiently far for the shearing blade to make contact with the project-ing excess weld material. With further build-up of pressure, the entire frame is now pulled in the opposite direction so that the shearing blade 19 is now brought up to the other side of the projecting excess weld materia I .
With further increasing pressure in the cylinders, the pincer-like shea.ing-off of the projecting excess weld material now occurs, with or without limitation of the stroke. Upon completion of the shearing-off operation, pressure is applied, via the tube connections 39, to the piston surfaces which are decreased by the cross-section of the piston rods, so that the cutting blades are moved back to their initial position.
After the hold-down clamps 40 have been pulled back, the device is -now lifted from the rail and can be immediately used for shearing off the next pro~ecting e~xcess weld material. Shearing off projecting ex-cess weld material with such a device, from the setting up of the device to its removal, can take place in less than one minute. The device according to the invention ensures easy handling and rapid resetting with rapid, and at the same time, reliable, shearing off of the project-ing excess weld material.
It will be obvious to those skilled in the art that many modifi-cations may be made within the scope of the present invention without departing from the spirit thereof, and the invention includes all such modifications .
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a portable device for the removal, down to the profile, of projecting excess weld material in rail joint-welding on laid track by a fluid operated cutting tool, the shearing blade means of which are mounted so at least one can move towards the other in a pincer-like manner, the improvement comprising frame means which absorb reac-tion forces arising during the shearing operation, said frame means being composed of longitudinal members connected by cross beams, at least one fluid device connected to one of said cross beams, and blade means on said fluid device and adapted to be recip-rocated thereby, whereby said blade means can be guided into said projecting excess weld material and shear off said material down to the rail profile.
2. A device according to claim 1 including two fluid devices mounted opposite each other on said cross beams in said frame means, and blade means on each of said fluid devices and adapted to be reciprocated thereby.
3. A device according to claim 1 including a second blade means connected to another of said cross beams.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2643260.0-25 | 1976-09-25 | ||
| DE2643260A DE2643260C2 (en) | 1976-09-25 | 1976-09-25 | Movable, portable device for working off excess weld metal when welding rails |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1116997A true CA1116997A (en) | 1982-01-26 |
Family
ID=5988855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000286677A Expired CA1116997A (en) | 1976-09-25 | 1977-09-14 | Transportable device for the removal of projecting excess weld material in rail joint-welding |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS5366840A (en) |
| AT (1) | AT353817B (en) |
| AU (1) | AU510765B2 (en) |
| CA (1) | CA1116997A (en) |
| CH (1) | CH621834A5 (en) |
| DD (1) | DD131905A5 (en) |
| DE (1) | DE2643260C2 (en) |
| FR (1) | FR2365658A1 (en) |
| GB (1) | GB1564466A (en) |
| IN (1) | IN148475B (en) |
| YU (1) | YU39622B (en) |
| ZA (1) | ZA775299B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2432908A1 (en) * | 1978-08-09 | 1980-03-07 | Delachaux C | DEVICE FOR SLICING EXCESS WELDING FORMED AFTER ALUMINOTHERMAL WELDING OF TWO END OF RAIL |
| DE29614532U1 (en) * | 1996-08-22 | 1996-10-31 | Elektro Thermit Gmbh | Device for shearing off excess weld metal during rail joint welding |
| DE29912713U1 (en) | 1999-07-21 | 2000-09-14 | Elektro Thermit Gmbh & Co Kg | Device for separating excess weld metal |
| SE543074C2 (en) * | 2018-08-13 | 2020-09-29 | Utv Center Ab | Weld cutting machine |
| CN110587013A (en) * | 2019-10-17 | 2019-12-20 | 江阴市宏力液压科技有限公司 | Three boss shearing equipment of deformed steel hydraulic pressure planer-type |
| CN110587012A (en) * | 2019-10-17 | 2019-12-20 | 江阴市宏力液压科技有限公司 | Hydraulic gantry type single-boss shearing equipment for special-shaped steel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5650408B2 (en) * | 1973-07-05 | 1981-11-28 |
-
1976
- 1976-09-25 DE DE2643260A patent/DE2643260C2/en not_active Expired
-
1977
- 1977-07-27 CH CH927577A patent/CH621834A5/en not_active IP Right Cessation
- 1977-07-28 AT AT553877A patent/AT353817B/en not_active IP Right Cessation
- 1977-08-17 IN IN1275/CAL/77A patent/IN148475B/en unknown
- 1977-08-29 YU YU2049/77A patent/YU39622B/en unknown
- 1977-09-01 AU AU28436/77A patent/AU510765B2/en not_active Expired
- 1977-09-01 ZA ZA00775299A patent/ZA775299B/en unknown
- 1977-09-13 DD DD7700201008A patent/DD131905A5/en unknown
- 1977-09-14 CA CA000286677A patent/CA1116997A/en not_active Expired
- 1977-09-22 FR FR7728563A patent/FR2365658A1/en active Granted
- 1977-09-23 GB GB39819/77A patent/GB1564466A/en not_active Expired
- 1977-09-26 JP JP11547977A patent/JPS5366840A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2365658A1 (en) | 1978-04-21 |
| AU2843677A (en) | 1979-03-08 |
| DE2643260B1 (en) | 1978-06-22 |
| GB1564466A (en) | 1980-04-10 |
| ATA553877A (en) | 1979-05-15 |
| CH621834A5 (en) | 1981-02-27 |
| AU510765B2 (en) | 1980-07-10 |
| AT353817B (en) | 1979-12-10 |
| YU39622B (en) | 1985-03-20 |
| FR2365658B1 (en) | 1981-05-29 |
| IN148475B (en) | 1981-03-07 |
| YU204977A (en) | 1982-10-31 |
| JPS5366840A (en) | 1978-06-14 |
| DD131905A5 (en) | 1978-08-09 |
| ZA775299B (en) | 1978-07-26 |
| DE2643260C2 (en) | 1979-02-15 |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |