JP2017053788A - Rail end surface flatness measuring jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rail end surface flatness measuring jig which allows flatness of a rail end surface to be quickly and easily measured without requiring high skill.SOLUTION: A rail end surface flatness measuring jig 100 comprises: a top surface reference member 40 which is abutted against a top surface of a rail R and has a reference surface aligned with the top surface; a side surface reference member 50 which is abutted against one side surface of the rail and has a reference surface aligned to this side surface; a measuring plate 10 which is coupled with the top surface reference member and the side surface reference member so as to have a smooth measuring surface made perpendicular to the reference surfaces of the top surface reference member and the side surface reference member and is pressed against and fixed to an end surface of the rail; and fixing means 20 for fixing the top surface reference member, the side surface reference member, and the measuring plate to the rail. The measuring plate comprises a plurality of measuring through holes 11 provided in different positions corresponding to the end surface of the rail in order to measure distances between the measuring surface and the end surface of the rail.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rail end face flatness measuring jig used for measuring the flatness of a rail end face when gas-welding a rail for rail.

  The gas pressure welding method is a method in which the members to be joined are butted and pressed in the axial direction, the surroundings of the butted portion are heated to a high temperature with a gas flame, and a predetermined deformation amount is obtained and joined. It has been. When welding railroad rails by this gas pressure welding method, it is necessary to measure whether or not the flatness of the rail end surface is within an allowable range. When the joining operation is performed in a state in which there is a large gap in the rail butt, a large amount of oxidized inclusions remain at the pressure interface, and the oxidized inclusion becomes a bonding inhibition factor, so that the joint quality is deteriorated. Therefore, in the current rail gas pressure welding operation, in order to minimize the gap between the rail abutting portions, the flatness of the end face is adjusted using a dedicated device, and then the flatness is visually confirmed using a right angle ruler.

  FIG. 8 shows a method for measuring the flatness visually using a right angle ruler according to the prior art. As shown in the figure, one side of the right-angle ruler is brought into contact with the side surface, top surface or bottom surface of the rail R, and gaps x, y between the end surface of the rail R and the other side of the right-angle ruler, and the gap x , Y is determined. 2A shows an example of measuring the flatness in the horizontal direction at the lower part (base) of the rail R, and FIG. 2B shows an example of measuring the flatness in the vertical direction at the center line of the rail R. Show. X and y in the figure indicate gaps.

  In recent years, an apparatus for measuring the flatness of a workpiece end surface for measuring the flatness of a cutting end surface of a large workpiece has been proposed (Patent Document 1).

  A flatness measuring device for a workpiece end surface described in Patent Document 1 is disposed at a position facing the end surface of a workpiece placed on a table, and extends in the X-axis direction parallel to the workpiece end surface. A column mounted vertically and movable in the X-axis direction, and a cutting tool for cutting the workpiece end surface are mounted on the column so as to be movable in the Y-axis direction parallel to the workpiece end surface perpendicular to the X-axis direction. In a cutting apparatus that cuts the end face of a workpiece by moving the spindle head in the X-Y axis direction, a piano wire extending parallel to the X-axis direction stretched on the bed is provided. A position measuring device that is disposed on the column so that it can be detected and that measures the position of the piano wire in the Z-axis direction that intersects the XY direction when the column is moved along the bed. , When the spindle head moves along the column An inclinometer that measures the inclination, a displacement measuring device that is installed on the spindle head and detects the relative distance between the spindle head and the workpiece end surface, and the straightness of the movement trajectory in the X-axis direction of the column based on the measurement value of the position measuring instrument In addition to calculating the degree, the straightness of the movement trajectory of the spindle head in the Y-axis direction was calculated from the measured value with the inclinometer, and measured with the inclinometer when both straightness and the column were moved along the bed And a control device that calculates the flatness of the movement trajectory of the spindle head from the change in the inclination of the column in the Z-axis direction. When the spindle head is moved along the end surface of the workpiece, the movement trajectory of the spindle head The flatness of the workpiece end surface is calculated by adding the measured value obtained by the displacement measuring instrument to the flatness and calculating.

JP-A-8-278103

  However, in the conventional measurement method using the right angle ruler described above, skill is required for checking the flatness, and when the right angle ruler is not properly applied to the rail, the flatness cannot be properly grasped. There was a thing. When gas pressure welding was performed in a situation where the flatness was not properly grasped, a large gap was generated at the butt portion of the rail, and the joint quality could be degraded. In addition, even if it is attempted to correct the end face again, there has been a problem that the flatness of the end face is lowered in a situation where the flatness is not properly grasped.

  On the other hand, in the case of the flatness measuring device for a workpiece end surface described in Patent Document 1 described above, the configuration of the device is complicated and the cost is high.

  Accordingly, the present invention solves the above-mentioned problems of the prior art, and the object of the present invention is to provide a rail that can accurately and accurately measure the flatness of the end face of the rail without requiring skill. The object is to provide an end face flatness measuring jig.

  According to the present invention, the rail end surface flatness measuring jig contacts the upper surface of the rail and aligns the reference surface with the upper surface, and contacts the one side surface of the rail and aligns the reference surface with the side surface. The side reference member is connected to the upper reference member and the side reference member so that the smooth measurement surface is perpendicular to the upper reference member and the reference surface of the side reference member, and is fixed by being pressed against the end surface of the rail. A plate and a fixing means for fixing the upper surface reference member, the side surface reference member, and the measurement plate to the rail are provided. The measurement plate includes a plurality of measurement through holes provided at different positions corresponding to the end surface of the rail in order to measure the distance between the measurement surface and the end surface of the rail.

  When the upper surface reference member, the side surface reference member, and the measurement plate are fixed to the rail by the fixing means, the measurement plate is fixed to the end surface of the rail perpendicular to the extension direction of the rail. In this state, a distance measuring device (for example, a dial gauge) is sequentially inserted into a plurality of through holes for measurement, and the distance between the end surface of the rail and the measuring surface of the measuring plate at a plurality of points is measured, thereby the end surface of the rail. Variation in the distance between and the measurement surface. Therefore, it is possible to accurately measure the flatness of the rail end face quickly and easily without requiring skill.

  It is preferable that a support plate installed in parallel with the measurement plate is further provided, and that the upper surface reference member and the side surface reference member are connected between the measurement plate and the support plate.

  It further includes a connecting plate connected between the measuring plate and the support plate and extending in parallel with the upper surface reference member and the side surface reference member, and the fixing means is screwed to the connecting plate and the tip is on the other side surface of the rail. It is also preferable that a positioning screw member capable of contacting is provided. Thereby, accurate measurement is possible.

  First and second measurement position adjusting connection plates connected between the measurement plate and the support plate and extending in parallel with the upper surface reference member and the side surface reference member, and first and second measurement position adjustment connection plates. It is also preferable to further include first and second measurement position adjusting means each constituted by first and second adjusting screws that are respectively screwed and adjust the right and left tilt angles with respect to the rail. Thereby, the position of the measurement plate can be adjusted.

  The measuring plate has a zero point adjustment hole for the distance measuring device, and the zero point adjustment hole has a closed surface parallel to the measurement surface that closes the zero point adjustment hole at the position of the measurement surface. Is also preferable. Thereby, the zero point adjustment of the distance measuring device can be easily performed at the time of measurement.

  According to the present invention, a distance measuring device (for example, a dial gauge) is sequentially inserted into a plurality of measurement through-holes in a state where the measurement plate is fixed to the end surface of the rail perpendicularly to the rail extension direction. By measuring the distance between the end surface of the rail and the measurement surface of the measurement plate, it is possible to know the variation in the distance between the end surface of the rail and the measurement surface. Therefore, it is possible to accurately measure the flatness of the rail end face quickly and easily without requiring skill.

It is a perspective view which shows roughly the structure of the rail end surface flatness measuring jig in one Embodiment of this invention. It is a left view which shows roughly the structure of the rail end surface flatness measuring jig in embodiment of FIG. It is a right view which shows roughly the structure of the rail end surface flatness measuring jig in embodiment of FIG. It is the top view seen from the measurement board side which shows the structure of the rail end surface flatness measuring jig in embodiment of FIG. 1 schematically. It is the end elevation seen from the support plate side which shows roughly the composition of the rail end surface flatness measuring jig in the embodiment of FIG. It is an AA line sectional view showing roughly the composition of the rail end face flatness measuring jig in the embodiment of FIG. It is a top view for demonstrating the measurement point in the rail end surface flatness measuring jig in embodiment of FIG. It is a figure which shows the measuring method using the right angle ruler by a prior art.

  Hereinafter, an embodiment of a rail end face flatness measuring jig according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a configuration of a rail end surface flatness measuring jig 100 according to an embodiment of the present invention. The figure schematically shows the overall configuration of the rail end surface flatness measuring jig 100 and shows a state where it is installed on the rail. 2 is a side view of the rail end surface flatness measuring jig 100 viewed from the left side, FIG. 3 is a side view of the rail end surface flatness measuring jig 100 viewed from the right side, and FIG. 5 is a plan view seen from the side, FIG. 5 is an end view seen from the support plate side, and FIG. 6 is a cross-sectional view taken along line AA of FIG. FIG. 7 shows the positional relationship between the measurement through-hole 11 and the end surface Ra of the rail R in the rail end surface flatness measuring jig 100.

  As shown in FIGS. 1 to 6, the rail end surface flatness measuring jig 100 according to the present embodiment includes an upper surface reference member 40 that abuts the upper surface of the rail R and aligns the reference surface with the upper surface of the rail R, and one of the rails R. The side reference member 50 that abuts the side surface and adjusts the reference surface to the side surface, and the upper surface reference member 40 and the side surface reference member so that the smooth measurement surface 10a is perpendicular to the reference surfaces of the upper surface reference member 40 and the side surface reference member 50. 50, a measurement plate 10 that is pressed against and fixed to the end surface Ra of the rail R, and an upper surface reference member 40, a side surface reference member 50, and a fixing means for fixing the measurement plate 10 to the rail R. ing.

  The measurement plate 10 is made of, for example, a metal plate, and includes a smooth measurement surface 10a on the side that contacts the end surface Ra of the rail R (the back side in FIG. 1). The measurement plate 10 is provided with a plurality (9 in the present embodiment) of measurement through holes 11 at different positions corresponding to the end surface Ra of the rail R. The plurality of measurement through-holes 11 are for inserting a distance measuring device (dial gauge D) for measuring the distance between the measurement surface 10a and the end surface Ra of the rail R. It is distributed and provided corresponding to a plurality of measurement points on the end face Ra. The measurement plate 10 further includes a zero point adjusting hole 12 for the dial gauge D. A zero point adjusting plate 13 is attached to the position of the zero point adjusting hole 12 on the back side of the measuring plate 10. The zero point adjusting plate 13 has a closing surface 13a parallel to the measuring surface 10a for closing the zero point adjusting hole 12 at the position of the measuring surface 10a. The zero point adjusting plate 13 is fixed to the measuring plate 10 with screws 14. The plurality of measurement through holes 11 and the zero point adjustment holes 12 are formed to have a diameter into which a dial gauge D probe can be inserted. The number of measurement through holes 11 is not limited to nine, and can be increased or decreased as necessary.

  A support plate 30 parallel to the measurement plate 10 is installed at a position facing the measurement plate 10. Between the measurement plate 10 and the support plate 30, an upper surface reference member 40, a side surface reference member 50, and a connection plate 60 are sandwiched in parallel with each other. The fixing means 20 is provided with ball plungers 61a and 61b which are screw members for positioning, which are screwed to the connecting plate 60 and whose front end portions can be in contact with the other side of the rail R obliquely.

  Two (first and second) measuring position adjusting means 70 for adjusting the right and left tilt angles of the rail end surface flatness measuring jig 100 with respect to the rail R and thereby adjusting the distance measuring position of the dial gauge D are provided. Is provided. These measurement position adjusting means 70 are connected between the measurement plate 10 and the support plate 30 and are connected to two (first and second) measurement position adjustment connections extending in parallel with the upper surface reference plate 40 and the side surface reference plate 50. The plate 71 and two adjustment screws 72 that are respectively screwed into the two measurement position adjustment connecting plates 71 and adjust the right and left inclination angles with respect to the rail R are respectively configured.

  The support plate 30 is provided with a notch 31 having substantially the same shape as the cross section of the rail R. Further, on both sides of the notch portion 31 of the support plate 30, weights 32 for balance adjustment are provided.

  The upper surface reference member 40 is provided with a horizontal plate 41 fixed to the measurement plate 10 and the support plate 30 with screws at both ends, and a lower surface of the horizontal plate 41 at a predetermined interval, and is in contact with the upper surface of the rail R. The upper reference plane is made up of two blocks 42 that match the upper surface. In this case, the lower surface of the block 42 becomes the upper surface reference surface. That is, there are two upper reference surfaces. The block 42 is attached to the horizontal plate 41 with screws (not shown) or the like.

  The side reference member 50 is provided with a vertical plate 51 fixed to the measuring plate 10 and the support plate 30 with screws at both ends, and a predetermined interval on the inner surface of the vertical plate 51. It comprises two blocks 52 that come into contact with each other and align the side reference surface with this side surface. In this case, the inner surface of the block 52 is the side reference surface. That is, there are two side reference surfaces. The block 52 is attached to the vertical plate 51 with screws.

  Both ends of the connecting plate 60 are fixed to the measuring plate 10 and the support plate 30 with screws, parallel to the upper surface reference member 40 and the side surface reference member 50, and in a horizontal plane as is apparent from FIGS. In contrast, it extends at a predetermined angle. Further, as shown in FIG. 3, the connecting plate 60 is provided with screw holes for screwing the ball plungers 61a and 61b at predetermined intervals.

  The measurement position adjusting means 70 are provided on the left and right sides of the rail R, respectively, and adjusts the left and right inclination angles of the rail end surface flatness measuring jig 100 with respect to the rail R. Each measurement position adjusting means 70 is fixed to the lower end of the measurement plate 10 and the support plate 30 with screws at both ends, and the measurement position adjustment connecting plate 71 extends in parallel with the upper surface reference plate 40 and the side surface reference plate 50. And an adjustment screw 72 provided substantially at the center of the measuring position adjusting connecting plate 71. By turning the adjusting screw 72, the tip of the adjusting screw 72 comes into contact with and presses against the base portion Rb (see FIG. 6) of the rail R. Therefore, the left and right inclination angles of the rail end surface flatness measuring jig 100 with respect to the rail R are adjusted. Thus, the distance measurement position of the dial gauge D on the measurement plate 10 can be adjusted.

  Hereinafter, the operation in the case of measuring the flatness of the end face of the rail R using the rail end face flatness measuring jig 100 configured as described above will be described.

  First, the rail end surface flatness measuring jig 100 is inserted into the end of the rail R through the notch 31 from the support plate 30 side.

  Next, the measurement surface 10a of the measurement plate 10 is pressed against the end surface of the rail R, and the upper surface reference surface of the upper surface reference member 40 is brought to the upper surface of the rail R and the side surface reference surface of the side surface reference member 50 is pressed by the ball plungers 61a and 61b. The rail end surface flatness measuring jig 100 is fixed to the rail R in a state where the rail end surfaces are aligned with the side surfaces of the rail R.

  Thereafter, the right and left inclination angles of the rail end surface flatness measuring jig 100 with respect to the rail R are adjusted by the left and right measurement position adjusting means 70 so that the plurality of measurement through holes 11 are positioned on the end surface Ra of the rail R. To adjust the distance measurement position of the dial gauge D.

  Next, distance measurement by the dial gauge D is performed. Prior to this measurement, the measuring point of the dial gauge D is inserted into the zero point adjusting hole 12, and the tip thereof is brought into contact with the closing surface 13a to perform zero point adjustment. Next, the gauge gauge D probe is inserted into each of the plurality of through holes 11 for measurement, and the distance between the measurement surface 10 a and the end surface Ra of the rail R is measured. Thereafter, based on the measurement results in the plurality of through holes 11 for measurement, the flatness of the end surface Ra of the rail R is calculated. It is determined whether or not the calculated flatness is within a specified range. Needless to say, the flatness may be calculated using the measurement result as the reference measurement result without adjusting the zero point of the dial gauge D based on the measurement result in the zero point adjustment hole 12.

  As described above, according to the present embodiment, the rail end surface flatness measuring jig 100 is brought into contact with the upper surface of the rail R so as to align the reference surface with the upper surface, and on one side surface of the rail R. The upper surface reference member 40 and the side surface reference member 50 are brought into contact with each other so that the reference surface matches the side surface and the smooth measurement surface 10a is perpendicular to the reference surfaces of the upper surface reference member 40 and the side surface reference member 50. The measurement plate 10 is connected and fixed by being pressed against the end surface Ra of the rail R, and the upper surface reference member 40, the side surface reference member 50, and a fixing means for fixing the measurement plate 10 to the rail R are provided. The measurement plate 10 is provided with a plurality of through holes 11 for measurement provided in a distributed manner corresponding to a plurality of measurement points on the end surface Ra of the rail R where measurement is required. Thereby, the dial gauge D is inserted into the plurality of through holes 11 for measurement, and the distance between the end surface of the rail and the measurement surface of the measurement plate at a plurality of points is measured, whereby the end surface Ra of the rail R and the measurement surface 10a are measured. You can know the variation in distance. Therefore, it is possible to accurately measure the flatness of the rail end face quickly and easily without requiring skill.

  In the above-described embodiment, the fixing means 20 is screwed to the connecting plate 60, and the ball plungers 61a and 61b, which are positioning screw members that can be obliquely contacted with the other side surface of the rail R, are used. Although an example of the configuration has been described, the present invention is not limited to this. Other fixing means may be used.

  Further, in the above-described embodiment, the measurement plate 10 is attached to the position of the zero point adjustment hole 12 of the dial gauge D and the zero point adjustment hole 12 on the back side of the measurement plate 10, and at the position of the measurement surface 10 a. Although the example provided with the zero point adjustment plate 13 having the closing surface 13a parallel to the measurement surface 10a for closing the zero point adjusting hole 12 has been described, the present invention is not limited to this. Other zero point adjustment methods may be used.

  All the embodiments described above are illustrative of the present invention and are not intended to be limiting, and the present invention can be implemented in other various modifications and changes. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

  It can be used for the purpose of measuring the flatness of the rail end surface when gas-welding railroad rails.

DESCRIPTION OF SYMBOLS 10 Measurement plate 10a Measurement surface 11 Measurement through-hole 12 Zero point adjustment hole 13 Zero point adjustment plate 13a Closed surface 14 Screw 20 Fixing means 30 Support plate 31 Notch 32 Weight for balance adjustment 40 Upper surface reference member 41 Horizontal plate 42, 52 Block 50 Side reference member 51 Vertical plate 60 Connecting plate 61a, 61b Positioning ball plunger 70 Measuring position adjusting means 71 Measuring position adjusting plate 72 Adjustment screw 100 Rail end surface flatness measuring jig D Dial gauge R Rail Ra rail End face Rb Base part

Claims (5)

  An upper surface reference member that contacts the upper surface of the rail and aligns the reference surface with the upper surface, a side surface reference member that contacts one of the side surfaces of the rail and aligns the reference surface with the side surface, and a smooth measurement surface is the upper surface reference member And a measurement plate connected to the upper surface reference member and the side surface reference member so as to be perpendicular to the reference surface of the side surface reference member, and pressed against the end surface of the rail, and the upper surface reference member, A fixing means for fixing the side surface reference member and the measurement plate to the rail, and the measurement plate is provided on an end surface of the rail in order to measure a distance between the measurement surface and the end surface of the rail. A rail end surface flatness measuring jig comprising a plurality of through holes for measurement provided at different positions corresponding to each other.   A support plate installed in parallel with the measurement plate is further provided at a position facing the measurement plate, and the upper surface reference member and the side surface reference member are connected between the measurement plate and the support plate. The rail end surface flatness measuring jig according to claim 1.   And a connecting plate connected between the measurement plate and the support plate and extending in parallel with the upper surface reference member and the side surface reference plate member. The rail end surface flatness measuring jig according to claim 1, further comprising a positioning screw member capable of abutting against the other side surface of the rail.   First and second measurement position adjusting connection plates connected between the measurement plate and the support plate and extending in parallel with the upper surface reference member and the side surface reference plate member, and the first and second measurements. First and second measurement position adjusting means are respectively provided with first and second adjustment screws that are respectively screwed on the position adjustment connecting plate and adjust the right and left tilt angles with respect to the rail. The rail end surface flatness measuring jig according to claim 3, wherein   The measurement plate includes a zero point adjustment hole of a distance measuring device, and the zero point adjustment hole has a closing surface parallel to the measurement surface that closes the zero point adjustment hole at the position of the measurement surface. The rail end surface flatness measuring jig according to any one of claims 1 to 4, wherein the jig is a rail end surface flatness measuring jig.

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