Steel rail head shape inspection sample plate

Abstract

A steel rail head shape inspection template belongs to the technical field of steel rail quality inspection tools and is used for inspecting the shape of a steel rail head. According to the technical scheme, an inspection sample plate is a rectangular steel plate, the edge of one side of the steel plate is a railhead side wall inclination inspection area, and the edge of the other side of the steel plate is a railhead thickness inspection area, a rail crown standard arc comparison area and a rail crown arc deviation value inspection area. The rail head side wall inclination inspection areas correspond to the outer contours of a rail head, a rail web and a rail bottom of a standard steel rail respectively, and the rail head thickness inspection areas correspond to the rail crown end face arc contour, the rail head side wall contour and the rail head lower jaw contour of the standard steel rail. And the rail crown standard arc comparison area and the rail crown arc deviation value inspection area respectively correspond to the rail crown top surface arc outline and the rail head side wall outline of the standard steel rail. The device is compact in structure and simple to operate, realizes rapid and quantitative inspection and evaluation of the shape of the railhead, and can accurately guide adjustment and control of the shape of the railhead in steel rail production.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sample board for checking the shape of a rail head, belonging to the technical field of rail quality detection tools. BACKGROUND

[0002] Rail is a very important product in railway construction. At present, rail production mainly adopts rolling process. In the production process of rail, the molten steel after refining is cast into a billet of a certain size by a continuous casting machine, the billet is heated to a rolling temperature in a walking beam furnace, and then is sent to a blooming mill to form a rail roughcast, then is reversibly multi-pass rough rolled in a universal rolling mill train, and finally is rolled into a finished product on a universal finishing mill. The finished rail is cut into a fixed size by a hot saw in a hot state, and the cut rail is sent to a walking beam cooling bed for cooling. The rail is straightened after cooling, is sent to a flat-stand combined straightening machine for straightening, and is subjected to ultrasonic and eddy current flaw detection for surface and internal quality to ensure the quality of the rail.

[0003] The cross-sectional shape of the rail is relatively complex, and the rail head contour is composed of multiple straight lines and circular arcs. In the rail inspection process, the rail head side wall slope, rail head thickness, rail crown circular arc lack of meat, and left-right symmetry and other shape characteristics need to be detected one by one to reduce the occurrence of profile overage and welding misalignment problems and improve the stability of the rail head shape. At present, measuring and inspection are carried out by using a caliper, a ruler, and a plug gauge, which is complicated to operate and has low measurement accuracy, cannot provide accurate guidance for rolling mill adjustment, seriously affects the production inspection efficiency, and needs to be improved. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem of providing a rail head shape inspection sample board. The sample board can check the shape of the rail head, the inspection process is fast and convenient, the rail head side wall slope, rail head thickness, rail crown circular arc lack of meat, and left-right symmetry and other shape characteristics can be quantitatively inspected, the inspection time is reduced, the inspection efficiency is improved, the basis for rail head shape control adjustment is provided, and the product appearance quality consistency is improved.

[0005] The technical solution to solve the above technical problems is:

[0006] The utility model provides a rail head shape inspection sample plate, and the inspection sample plate is a rectangular steel plate, one side edge of the steel plate is a rail head side wall slope inspection area, the middle part of the edge of the other side of the steel plate is a rail head thickness inspection area, the upper part of the edge is a rail crown standard circular arc comparison area, and the lower part of the edge is a rail crown circular arc deviation value inspection area, the edge shape of the rail head side wall slope inspection area corresponds to the external contour of the rail head, rail waist and rail bottom of a standard rail respectively, the edge of the rail head thickness inspection area corresponds to the circular arc contour of the rail crown end face, rail head side wall contour and rail head lower jaw of a standard rail, the edge shape of the rail crown standard circular arc comparison area corresponds to the circular arc contour of the rail crown top face and rail head side wall contour of a standard rail respectively, and the edge of the rail crown circular arc deviation value inspection area corresponds to the circular arc contour of the rail crown top face and rail head side wall contour of a standard rail respectively.

[0007] The edge of the rail head side wall slope inspection area of the above-mentioned rail head shape inspection sample plate is composed of a rail head side wall inspection line, a rail waist inspection line and a rail bottom inspection line, the rail head side wall inspection line is located at the upper part of the edge of the rail head side wall slope inspection area, is a vertical line, corresponds to the rail head side wall of a standard rail, has two semicircular convex points on the rail head side wall inspection line, the two semicircular convex points are opposite to the two end points of the rail head side wall of a standard rail, the rail waist inspection line is located at the middle part of the edge of the rail head side wall slope inspection area, is a horizontal U-shaped line, the top surface of the U-shaped line is a circular arc, and the circular arc corresponds to the outside contour of the rail waist of a standard rail, and the rail bottom inspection line is located at the lower part of the edge of the rail head side wall slope inspection area, is a horizontal inclined line segment, and corresponds to the upper surface of the rail bottom of a standard rail.

[0008] The edge of the rail head thickness inspection area of the above-mentioned rail head shape inspection sample plate is a C-shaped rail head thickness inspection line, the upper part of the C-shaped rail head thickness inspection line is a circular arc line segment, the middle part is a vertical line segment, and the lower part is a horizontal inclined line segment, the circular arc line segment corresponds to the circular arc contour of the rail crown end face of a standard rail, the middle part vertical line segment corresponds to the rail head side wall of a standard rail, the lower part horizontal inclined line segment corresponds to the rail head lower jaw of a standard rail, and a certain gap is left.

[0009] The edge of the rail crown standard circular arc comparison area of the above-mentioned rail head shape inspection sample plate is an L-shaped rail crown circular arc inspection line, the upper part of the L-shaped rail crown circular arc inspection line is a vertical line, the lower part is a horizontal inclined line, there is a circular arc between the vertical line and the horizontal inclined line, the upper part vertical line corresponds to the rail crown top face circular arc, the lower part horizontal inclined line corresponds to the rail head side wall, and the middle circular arc corresponds to the rail crown end face circular arc.

[0010] The rail head shape inspection sample plate, the rail head side wall inspection line of the L-shaped edge of the rail head side wall slope inspection area of the steel plate, the rail waist inspection line of the rail head side wall inspection line, and the rail bottom inspection line of the rail head side wall inspection line can inspect the rail head side wall, the rail waist, and the rail bottom external contour shape, and whether the rail head is meat-deficient.

[0011] The rail head shape inspection sample plate has the advantages that:

[0012] The rail head side wall inspection line of the L-shaped edge of the rail head side wall slope inspection area of the steel plate, the rail waist inspection line of the rail head side wall inspection line, and the rail bottom inspection line of the rail head side wall inspection line can inspect the rail head side wall, the rail waist, and the rail bottom external contour shape, and whether the rail head is meat-deficient.

[0013] The rail head shape inspection sample plate has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of a steel rail;

[0015] Figure 2 It is a structural schematic view of the utility model;

[0016] Figure 3 It is a schematic view of the utility model for inspecting a rail head side wall;

[0017] Figure 4 It is a schematic view of the utility model for inspecting a rail head thickness;

[0018] Figure 5 It is a schematic view of the utility model for inspecting whether a rail head crown arc is meat-deficient;

[0019] Figure 6 It is a schematic view of the utility model for inspecting a rail head crown arc contour deviation value.

[0020] The figure is marked as follows: rail head 1, rail waist 2, rail bottom 3, rail crown 4, rail crown top surface arc 5, rail crown end surface arc 6, rail head side wall 7, rail head lower jaw 8, inspection template 9, rail head side wall slope inspection area 10, rail head thickness inspection area 11, rail crown standard arc comparison area 12, rail crown arc deviation value inspection area 13, rail head side wall inspection line 14, rail waist inspection line 15, rail bottom inspection line 16, semicircular convex point 17, rail head thickness inspection line 18, rail crown arc inspection line 19, rail crown arc deviation inspection line 20. DETAILED DESCRIPTION

[0021] Figure 1 It is shown that the steel rail is composed of rail head 1, rail waist 2, and rail bottom 3. The upper end of the rail head 1 is the rail crown 4, the top surface of the rail crown 4 has the rail crown top surface arc 5, the two ends of the rail crown 4 have the rail crown end surface arc 6, the two sides of the rail head 1 are the rail head side wall 7, and the lower end of the rail head 1 is the rail head lower jaw 8. When the steel rail is inspected, the shapes of these parts need to be inspected.

[0022] Figure 2 It is shown that the inspection template 9 is a rectangular steel plate, four inspection areas are respectively arranged on both sides of the steel plate of the inspection template 9, the edges of the steel plate of the four inspection areas respectively have different shapes, these shapes are respectively the same as the shapes of the rail head and rail body of the standard steel rail, and the edges of the steel plate of these inspection areas are respectively opposite to the rail head and rail body of the steel rail to be inspected, so that whether the steel rail to be inspected is the same as the standard steel rail can be checked, and the inspection is fast and accurate.

[0023] The four inspection areas of the inspection template 9 are respectively the rail head side wall slope inspection area 10, the rail head thickness inspection area 11, the rail crown standard arc comparison area 12, and the rail crown arc deviation value inspection area 13. The rail head side wall slope inspection area 10 is located on one side edge of the inspection template 9, the upper part of the edge on the other side of the inspection template 9 is the rail crown standard arc comparison area 12, the middle part of the edge is the rail head thickness inspection area 11, and the lower part of the edge is the rail crown arc deviation value inspection area 13.

[0024] Figure 2 It is shown that the steel plate edge of the rail head side wall slope inspection area 10 of the inspection template 9 is composed of the rail head side wall inspection line 14, the rail waist inspection line 15, and the rail bottom inspection line 16, which respectively correspond to the external contours of the rail head 1, the rail waist 2, and the rail bottom 3 of the standard steel rail, and are used for checking the external shapes of the rail head 1, the rail waist 2, and the rail bottom 3 of the steel rail to be inspected.

[0025] The rail head side wall inspection line 14 is located on the upper part of the steel plate edge of the rail head side wall slope inspection area 10, the rail head side wall inspection line 14 is a vertical line, the rail head side wall inspection line 14 corresponds to the rail head side wall 7 of the standard steel rail, and the rail head side wall inspection line 14 has two semicircular convex points 17, which correspond to the two end points of the rail head side wall 7 of the standard steel rail.

[0026] The rail waist inspection line 15 is located in the middle of the steel plate edge of the rail head side wall slope inspection area 10, and is a horizontal U-shaped line. The top surface of the U-shaped line is a circular arc, which corresponds to the outside profile of the rail waist 2 of the standard rail.

[0027] The rail bottom inspection line 16 is located in the lower part of the steel plate edge of the rail head side wall slope inspection area 10, and is a horizontal inclined line segment, which corresponds to the upper surface of the rail bottom 3 of the standard rail.

[0028] Figure 2 As shown, the rail head thickness inspection line 18 of the rail head thickness inspection area 11 of the inspection sample plate 9 is a C-shaped line, which is used to check whether the thickness of the rail head 1 meets the requirements. The upper part of the C-shaped rail head thickness inspection line 18 is a circular arc line segment, the middle part is a vertical line segment, and the lower part is a horizontal inclined line segment. The circular arc line segment corresponds to the rail crown end surface circular arc 6 of the standard rail, the middle part vertical line segment corresponds to the rail head side wall 7 of the standard rail, and the lower part horizontal inclined line segment corresponds to the rail head lower jaw 8 of the standard rail, and a certain gap is left.

[0029] Figure 2 As shown, the rail crown circular arc inspection line 19 of the rail crown standard circular arc comparison area 12 of the inspection sample plate 9 is an L-shaped line, which is used to check the shape of the rail crown top surface circular arc 5 and the rail head side wall 7 of the rail head 1 of the steel rail to be inspected. The rail crown circular arc inspection line 19 corresponds to the rail crown top surface circular arc 5 profile and the rail head side wall 7 profile of the standard rail respectively. The upper part of the L-shaped rail crown circular arc inspection line 19 is a vertical line, and the lower part is a horizontal inclined line. The vertical line and the horizontal inclined line are connected by a circular arc. The upper part vertical line corresponds to the rail crown top surface circular arc 5 of the standard rail, the lower part horizontal inclined line corresponds to the rail head side wall 7, and the middle circular arc corresponds to the rail crown end surface circular arc 6 of the standard rail.

[0030] Figure 2 As shown, the rail crown circular arc deviation inspection line 20 of the rail crown circular arc deviation value inspection area 13 of the inspection sample plate 9 is an L-shaped line, which is used to check the shape of the rail crown top surface circular arc 5 of the steel rail to be inspected. The upper part of the L-shaped rail crown circular arc deviation inspection line 20 is a horizontal straight line segment, and the lower part is a vertical inclined line segment. The upper part straight line segment is consistent with the rail head side wall 7 profile of the standard rail, and the lower part inclined line segment corresponds to the rail crown top surface circular arc 5 of the standard rail. There are three semicircular convex points 17 on the lower part inclined line segment. The positions of the three semicircular convex points 17 correspond to the junction points of the rail crown top surface circular arc 5 of the standard rail respectively. The lowermost semicircular convex point 17 is in contact with the rail head vertex, and the upper two semicircular convex points 17 leave a certain gap with the rail crown top surface circular arc 5 of the standard rail.

[0031] Figure 3As shown, when the rail head side wall slope inspection area 10 of the inspection template 9 is used for inspection, the rail waist inspection line 15 is attached to the rail waist 2 of the steel rail to be inspected, and the lower rail bottom inspection line 16 is attached to the upper surface straight line segment of the rail bottom 3, so as to realize the positioning of the inspection template 9. After positioning, the clearance between the two semicircular convex points 17 of the rail head side wall inspection line 14 and the rail head side wall 7 is measured by using the feeler gauge, and the clearance is compared with the rail head side wall 7 of the standard steel rail, so as to obtain the deviation of the two rail head side walls, and the deflection amount of the rail head center line relative to the rail waist center line can be evaluated.

[0032] Figure 4 As shown, when the rail head thickness inspection area 11 of the inspection template 9 is used for rail head 1 thickness inspection, the rail head thickness inspection line 18 of the steel plate edge of the inspection template 9 is attached to the rail crown end surface arc 6, the rail head side wall 7 and the rail head lower jaw 8 of the steel rail to be inspected, so as to realize the positioning of the template. After positioning, the clearance t between the lower horizontal oblique line segment of the rail head thickness inspection line and the rail head lower jaw 8 is measured by using the feeler gauge. When the template is designed, the profile is larger than the standard cross-section rail head thickness by t0, so the measured rail head thickness deviation is t0-t. A positive value indicates that the rail head thickness is greater than the standard value, and a negative value indicates that the rail head thickness is less than the standard value. By comparing the deviation values of the two rail head 1 thicknesses, the symmetry of the rail head 1 thickness can be evaluated.

[0033] Figure 5 As shown, when the rail crown standard arc comparison area 12 of the inspection template 9 is used for the steel plate edge to check whether the rail crown top surface arc 5 is undercut, the lower oblique line of the rail crown arc inspection line 19 is attached to the rail head side wall 7, and the inspection template 9 is moved downward along the rail head side wall 7 until the arc segment of the rail crown arc inspection line 19 is in contact with the rail crown top surface arc 5 and cannot be moved any more, so as to realize the positioning of the template. After positioning, the clearance between the arc segment of the rail crown arc inspection line 19 and the rail crown top surface arc 5 is visually inspected, so as to judge the consistency of the rail crown profile of the steel rail to be inspected with the rail crown profile of the standard steel rail, and whether the rail crown top surface arc 5 has excess material or undercut. If there is no clearance between the rail crown arc inspection line 19 and the rail crown top surface arc 5, and there is clearance between the rail crown arc inspection line 19 and the rail crown end surface arc 6, it indicates that the rail crown end surface arc 6 has undercut. If there is clearance between the rail crown arc inspection line 19 and the rail crown top surface arc 5, and there is no clearance between the rail crown arc inspection line 19 and the rail crown end surface arc 6, it indicates that the rail crown end surface arc 6 has excess material.

[0034] Figure 6The rail head side wall 7 is adhered to the rail head top surface arc 5, and the check sample 9 is positioned on the rail head top surface arc 5.

[0035] One embodiment of the utility model is as follows:

[0036] The length of the check sample 9 is 160 mm, the width is 96 mm, and the thickness is 5 mm.

Claims

1. A rail head profile inspection template, characterised in that: The inspection sample plate (9) is a rectangular steel plate, one side edge of the steel plate is a rail head side wall slope inspection area (10), the middle part of the other side edge of the steel plate is a rail head thickness inspection area (11), the upper part of the edge is a rail crown standard circular arc comparison area (12), and the lower part of the edge is a rail crown circular arc deviation value inspection area (13), the steel plate edge shape of the rail head side wall slope inspection area (10) corresponds to the external contour of the rail head (1), rail waist (2) and rail bottom (3) of the standard steel rail respectively, the steel plate edge of the rail head thickness inspection area (11) corresponds to the rail crown end face circular arc (6) contour, rail head side wall (7) contour and rail head lower jaw (8) contour of the standard steel rail, the steel plate edge shape of the rail crown standard circular arc comparison area (12) corresponds to the rail crown top face circular arc (5) contour and rail head side wall (7) contour of the standard steel rail respectively, and the steel plate edge of the rail crown circular arc deviation value inspection area (13) corresponds to the rail crown top face circular arc (5) contour and rail head side wall (7) contour of the standard steel rail respectively.

2. The rail head profile inspection template of claim 1, wherein: The steel plate edge of the rail head side wall slope inspection area (10) is composed of a rail head side wall inspection line (14), a rail waist inspection line (15) and a rail bottom inspection line (16), the rail head side wall inspection line (14) is located at the upper part of the steel plate edge of the rail head side wall slope inspection area (10), the rail head side wall inspection line (14) is a vertical line, the rail head side wall inspection line (14) corresponds to the rail head side wall (7) of the standard steel rail, the rail head side wall inspection line (14) has two semicircular convex points (17) opposite to the two end points of the rail head side wall (7) of the standard steel rail, the rail waist inspection line (15) is located at the middle part of the steel plate edge of the rail head side wall slope inspection area (10), the rail waist inspection line (15) is a horizontal U-shaped line, the top surface of the U-shaped line is a circular arc, the circular arc corresponds to the outside contour of the rail waist (2) of the standard steel rail, and the rail bottom inspection line (16) is located at the lower part of the steel plate edge of the rail head side wall slope inspection area (10), the rail bottom inspection line (16) is a horizontal inclined line segment, and the rail bottom inspection line (16) corresponds to the upper surface of the rail bottom (3) of the standard steel rail.

3. The rail head profile inspection template of claim 1 wherein: The steel plate edge of the rail head thickness inspection area (11) is a C-shaped rail head thickness inspection line (18), the upper part of the C-shaped rail head thickness inspection line (18) is a circular arc line segment, the middle part is a vertical line segment, and the lower part is a horizontal inclined line segment, the circular arc line segment corresponds to the rail crown end face circular arc (6) contour of the standard steel rail, the middle part vertical line segment corresponds to the rail head side wall (7) of the standard steel rail, the lower part horizontal inclined line segment corresponds to the rail head lower jaw (8) of the standard steel rail, and a certain gap is left.

4. The rail head profile inspection template of claim 1 wherein: The steel plate edge of the rail crown standard circular arc comparison area (12) is an L-shaped rail crown circular arc inspection line (19), the upper part of the L-shaped rail crown circular arc inspection line (19) is a vertical line, the lower part is a horizontal inclined line, and a circular arc is arranged between the vertical line and the horizontal inclined line, the upper part vertical line corresponds to the rail crown top face circular arc (5), the lower part horizontal inclined line corresponds to the rail head side wall (7), and the middle circular arc corresponds to the rail crown end face circular arc (6).

5. The rail head profile inspection template of claim 1 wherein: The rail head arc deviation checking area (13) is a rail head arc deviation checking line (20) with L-shaped steel plate edges, the upper part of the L-shaped rail head arc deviation checking line (20) is a horizontal straight line segment, and the lower part is a vertical inclined line segment, the upper straight line segment is consistent with the rail head side wall (7) profile of the standard steel rail, the lower inclined line segment is opposite to the rail head top surface arc (5) of the standard steel rail, three semicircular convex points (17) are arranged on the lower inclined line segment, the three semicircular convex points (17) are respectively located at the junction points of the rail head top surface arc (5) of the standard steel rail, the lowermost semicircular convex point (17) is attached to the vertex of the rail head (1), and the upper two semicircular convex points (17) are left with a certain gap from the rail head top surface arc (5) of the standard steel rail.

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