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
  • E01B31/17—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding
• • 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
• • 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
  • E01B31/13—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by milling

Definitions

• the present invention concerns a method and a machine for treatment of joints, primarily welding joints in railway rails.
• the splicing of rails is usually carried out by welding the ends of two rails together, and on welding a bead is formed. This bead must be removed so that the wheels of trains are not damaged and in order to make train journeys smoother.
• the object of the present invention is to provide a method and a machine for treatment of railway rail joints by means of which the manual work is eliminated to a large extent and, with this aim in mind, the method is characterized in that the treatment is performed as a numerically controlled process and in that the machine weighs so little that it can be easily handled by a man.
• the machine for carrying out the method is characterized in that it comprises a grinding beam with means that is in contact with the rail and that defines a reference plane, which grinding beam supports a height-adjustable treatment tool, which grinding beam is rotatable around a shaft that extends substantially in the rail's longitudinal direction over at least the upper part of the rail, and in that the treatment tool's movement along the rail takes place either by the treatment tool moving along the grinding beam or by the grinding beam's fasteners moving along the rail, the treatment tool's raising and lowering and rotation around the rail and the treatment motion along the rail are accomplished by electrically-powered shafts under the influence of a numerical process.
• the method of treatment of railway rail joints in which a machine that supports a treatment tool is used, comprises the following steps:
• step i) that the same procedure as in step d) to step h) is repeated from the opposite direction, so as to obtain the location as well as the height and width of the joint, j) that the grinding is started by the machine or the treatment tool being moved back and forth over the joint, at the same time as the treatment tool is rotated around a shaft that extends in the longitudinal direction of the rail over at least the upper part of the rail so that all parts that are to be treated are reached by the treatment tool.
• the method comprises the step that the treatment tool, when the treatment approaches the dimensions determined regarding the joint's height according to step i) is brought to move in a new way according to step d) to determine the treatment tool's wear relative to the reference plane which wear has taken place during the carried out treatment since the previous measurement, and a new reference value is calculated with regard to this wear, after which final treatment is carried out in accordance with step j).
• the present invention also concerns a machine for implementing the method according to any of the preceding embodiments of the invention.
• the machine includes a frame that is moveable along a railway rail, which frame supports a treatment tool holding beam with means that is in contact with the rail and that defines a reference plane, and that supports a height-adjustable treatment tool, which beam is rotatable about a shaft that extends substantially in the longitudinal direction of the rail, over at least the upper part of the rail, and that the frame's movement along the rail, the treatment tool's raising and lowering and rotation around the rail, and the treatment motion are accomplished by electrically-powered shafts under the influence of a numerical process.
• the frame includes means to non- rotatably lock the frame relative to the rail.
• the treatment tool is either a grinding tool or a cutting tool.
• Fig 1 shows in perspective and at angle from above, a short side of a machine according to the invention positioned on a section of railway rail.
• Figure 2 is a perspective view shown at an angle from above and from the opposite short side of the machine shown in Figure 1.
• Figure 3 is a perspective view shown at an angle from the short side shown in Figure 1 , whereby parts of the machine have been omitted to promote understanding, and a treatment tool-supporting part of the machine is angled around the longitudinal direction of the rail.
• Figure 4 is a perspective view corresponding to Fig 1 but with a part of the machine omitted in order to promote understanding, and
• Figure 5 is an end view of the machine according to the invention positioned on a rail and with the treatment tool-supporting part of the same positioned at an angle as in Figure 3.
• the machine is shown in Figure 1 in perspective placed on a section of a rail 1 , and it includes a carriage that is formed by an outer frame 2, and two rail fasteners 3, which grip the rail at two positions at a distance from each other in the longitudinal direction of the rail.
• Each fastener consists of a support roller 7 at the top of the rail and two V- shaped wheels 5 which grip around the corner between the side and the underside of the running surface on the rail.
• One support roller 7 is driven while the other is a measuring roller.
• the outer frame 2 is provided with a driving motor or a traction motor 6, via which the driven support roller 7 can drive the carriage back and forth on the rail.
• a treatment tool holding beam 8 whose angle is adjustable with respect to the outer frame, is arranged inside the outer frame 2.
• the treatment tool holding beam 8 supports two reference rollers located in the vicinity of the front and rear ends of the reference rollers 4, which rest against the rail's surface and form a common rotating mechanical reference plane that is always in contact with the rail.
• a substantially half-circular protecting plate 9 is arranged at the end of the machine shown closest in Figure 1.
• a vertically arranged driving motor 10 for a treatment tool 11 that can for example be a grinding tool or a cutting tool with which the un-evenness of the rail joint can be removed, can also be seen.
• Figure 2 shows the machine according to the invention in perspective from the opposite side compared to Figure 1 and it can here be seen that a cog track is located along the circular contour of the protecting plate 9.
• a fixed rotatable shaft 13 around which two rocker arms are pivotably arranged is arranged in the outer frame 2.
• the rotatable shaft 13 lies parallel to the rail 1 and just above the wear surface on the rail.
• the rocker arms and thereby the entire treatment tool holding beam 8 can be rotated around the rotatable shaft 13 by means of a drive unit, which includes a driving motor 14.
• the treatment tool holding beam's 8 main parts are a treatment tool 11 , such as a grinding cap, a grinding belt or a cutting tool and a driving motor 10 and reference rollers 4.
• the driving motor 10 is preferably an electric motor.
• the reference rollers 4 are fixedly mounted in the treatment tool holding beam 8 and form a plane that is in contact with the surface of the rail.
• the beam's two reference rollers 4 are pressed against the rail 1 with a force exerted by springs, so that the mechanical reference plane is in contact with the wear surface on the rail 1.
• the treatment tool's 11 distance to the surface of the rail is the same as to the reference plane and can be adjusted with high precision and is independent of the treatment tool holding beam's angle to the rotatable shaft.
• the treatment tool's driving motor 10 - and thus the treatment tool 11 - is raised and lowered by means of an actuator 15 arranged in the treatment tool holding beam 8.
• Figure 3 shows a side view from an angle from the side of the machine according to the invention where the front protecting plate has been omitted. This shows how the cog track 12 interacts with a drive wheel 16 that is preferably driven by an electric driving motor 14. It is apparent from this figure how the entire treatment tool holding beam 8 has been rotated through 80 ° around the rotatable shaft 13 in a clockwise direction so that the treatment tool will, in this position, be able to treat the surface of the rail 1 which lies between the underside of its wear surface and its side surface.
• the treatment tool holding beam 8 can of course also be rotated between ⁇ 0 and approximately ⁇ 90 °, so that the corresponding opposing surface of the rail can be treated. Since the treatment tool holding beam 8 during its rotation constantly describes an arc corresponding to the rail's profile around the shaft 13 the treatment tool 11 will constantly be located at the same distance from the mechanical reference plane formed by the two reference rollers 4 (see Figure 2). The treatment tool 11 can be moved to and from the treatment surface by means of the actuator 15, as will be explained further below.
• the machine is connected to a computer 18 that in a numerical process monitors and controls the various motors 6, 10 and 14 and the actuator 15. This computer 18 is shown schematically in Figure 1 located outside the outer frame 2 and is provided with conductors that are connected to the motors and actuators.
• Figure 4 is a perspective view essentially corresponding to Fig 1 but with the protecting plate omitted and with the treatment tool holding beam 8 in its neutral position, i.e. in the position in which the treatment tool 11 is in position for treating the rail's wear surface. It also shows how the V-shaped wheels 5 of the rail fasteners 3 are rotatably arranged on angled arms 7 that are pivotably mounted in the outer frame 2 to allow for simple fastening of the rail fasteners to the rail 1.
• the location of those angled arms 17 relative to the rail 1 can be adjustable with screws or the like.
• Figure 5 shows an end view of the machine according to the invention mounted on a rail 1 with a reference roller 4 in contact with the rail's wear surface, and two V-shaped wheels 5 engaging the rail's side surface and underside of the rail's wear surface.
• the machine is placed on the rail, above the joint, so that the joint is located at the side of treatment tool.
• the rail fasteners 3 are activated and the support rollers 7 and V-shaped wheels 5 are clamped on the rail 1 so that the machine is anchored to the rail.
• the machine is supplied with information about which side of the treatment tool 1 the joint is located.
• the machine receives a start signal from an operator.
• the machine begins to slowly rotate the treatment tool 11 using a motor at low power and lowers it to the rail. When the treatment tool 11 comes into contact with the rail the motor 10 detects this. This position is then the reference position for the treatment tool's position relative to the reference plane formed by the reference rollers 4.
• the treatment tool 11 then moves up a few mm from the reference plane.
• the traction motor 6 drives the outer frame and thus the treatment tool holding beam 8 and treatment tool 11 along the longitudinal direction of the rail until the treatment tool meets the joint. This is detected by the treatment tool's 11 driving motor 10. The treatment tool 11 is then raised in a stepwise manner until it loses contact with the joint.
• the machine then repeats the scaling of the joint from the other direction. This will provide information on the location, height and width of the joint.
• the treatment begins by the carriage moving back and forth over the joint while the treatment tool holding beam 8 is turned sideways so that all parts of the rail that are to be treated are reached by the treatment tool 1.
• the new reference value is used for final treatment with the desired accuracy.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Machines For Laying And Maintaining Railways (AREA)

Applications Claiming Priority (2)

Publications (1)

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Cited By (8)

Citations (2)

• 2009
  • 2009-11-13 SE SE0950855A patent/SE534317C2/sv not_active IP Right Cessation
• 2010
  • 2010-11-15 WO PCT/SE2010/051252 patent/WO2011059395A1/en active Application Filing

Patent Citations (2)

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