CN211897638U - Grinding template for steel rail in straight section of ordinary speed railway - Google Patents
Grinding template for steel rail in straight section of ordinary speed railway Download PDFInfo
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- CN211897638U CN211897638U CN201922227001.0U CN201922227001U CN211897638U CN 211897638 U CN211897638 U CN 211897638U CN 201922227001 U CN201922227001 U CN 201922227001U CN 211897638 U CN211897638 U CN 211897638U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000005498 polishing Methods 0.000 claims abstract description 20
- 230000001788 irregular Effects 0.000 claims abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 7
- 238000009415 formwork Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Machines For Laying And Maintaining Railways (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
A grinding template for steel rails of a straight line section of a conventional speed railway comprises a template body and a positioning part, wherein the template body is arranged at the upper end of the positioning part and is plate-shaped; the template body comprises a measuring template and a connecting template, the measuring template and the connecting template are both of rectangular plate structures, the connecting template and the measuring template are arranged vertically on the same plane, the short edge of the measuring template is collinear with the long edge of the connecting template, and the length of the long edge of the measuring template is greater than that of the short edge of the connecting template; the measuring template comprises a measuring template body and an inner groove, the inner groove is formed in the long edge position of the inner side of the measuring template, and the groove surface of the inner groove is an irregular curved surface. The steel rail after being polished can better adapt to the operation environment of the ordinary speed railway through the optimized polishing target profile, the contact area is increased, the contact stress is reduced, a proper wheel diameter difference is provided, the curve passing performance is improved, and the development rate of abrasion and contact damage is reduced.
Description
Technical Field
The utility model belongs to railway engineering measurement and maintenance field, concretely design rail template of polishing.
Background
Wheel rail surface contact stresses tend to exceed the material yield limit and rail wear, plastic deformation and contact fatigue damage have been the major forms of rail surface contact damage. The rail contact fatigue not only affects the rail flaw detection precision, but also the development characteristics of the rail contact fatigue are difficult to predict and become an important risk source of rail fracture accidents, the rail abrasion and plastic deformation change the rail profile, the wheel-rail contact parameters such as wheel-rail contact point distribution, equivalent taper, wheel diameter difference, contact angle difference and the like are directly affected, the vehicle linear stability is reduced when the equivalent taper exceeds a certain limit value, the vehicle critical speed is lower than the normal running speed, the wheel set generates large-amplitude transverse movement at the moment and can not be automatically converged, the wheel-rail force is rapidly increased, the great potential safety hazard is formed, and the development of rail contact damage is aggravated. Wheel rail contact damage and wheel rail dynamic characteristic evolution enter a vicious circle, and if effective measures are not taken for intervention, the wheel rail dynamic performance is greatly reduced, and the service life of the steel rail is shortened.
The rail grinding becomes an important measure for removing the fatigue damage on the surface of the rail, optimizing the contact state of the wheel rail and improving the dynamic performance, effectively prolongs the service life of the rail, reduces the potential safety hazard and is widely applied at home and abroad. The selection of the steel rail grinding target profile is vital, the reasonable grinding target profile effectively removes the contact damage on the surface of the steel rail, and realizes good wheel rail dynamic performance, otherwise, the contact damage initiation and development rate on the surface of the steel rail are increased.
The patent CN201410598757.5 discloses a steel rail cross section contour detection template, which relates to a steel rail cross section contour detection template, and comprises a template body, wherein the template body is a rectangular template with a hollow part at the edge, the contour of the hollow part is consistent with the standard contour or the designated contour of the steel rail cross section, and the template body is also provided with scale marks for indicating the angle of the steel rail cross section contour and corresponding scales; when the detection template is used, the detection template is vertically placed on the cross section of the steel rail to be detected, whether the outline of the hollowed part is matched with the outline of the cross section of the steel rail to be detected or not is judged, if yes, the steel rail to be detected is qualified, and if not, the steel rail to be detected is evaluated according to the size of a gap between the outline of the hollowed part and the outline of the cross section of the steel rail to be detected and the scale corresponding to the gap.
Compared with the prior art, the comparison file is low in manufacturing cost, simple to install and use and convenient to carry, and can be used for conveniently detecting the cross section profile of the steel rail on site and the cross section profile of the steel rail after finishing the grinding operation, so that the cross section state of the steel rail is quickly evaluated. But it can not solve the problem that the rail polishing target profile is the standard profile of the rail cross section due to different influence degrees on the vehicle dynamics performance after the wheel tread is abraded, the polishing completion can not be ensured, the stability of the freight train can be considered, and the stability of the passenger train can be ensured.
The prior steel rail grinding template can design the profile of a steel rail grinding target by taking the maintenance of reasonable wheel diameter difference and the reduction of contact stress as targets.
Disclosure of Invention
The utility model relates to a wheel tread wearing and tearing back is less to the lead to contact angle that the influence degree difference of vehicle dynamics performance caused among the solution prior art, has the problem of great safety risk, provides a rail template of polishing, has solved above-mentioned problem through formulating specific curved surface template.
The utility model provides a polishing template for steel rails in straight sections of a general speed railway, which comprises a template body and a positioning part, wherein the template body is arranged at the upper end of the positioning part and is in a plate shape; the template body comprises a measuring template and a connecting template, the measuring template and the connecting template are both of rectangular plate structures, the connecting template and the measuring template are arranged vertically on the same plane, the short edge of the measuring template is collinear with the long edge of the connecting template, and the length of the long edge of the measuring template is greater than that of the short edge of the connecting template; the measuring template comprises a measuring template body and an inner groove, the inner groove is formed in the long edge position of the inner side of the measuring template, and the groove surface of the inner groove is an irregular curved surface.
The measuring template is used for contacting the rail head of the steel rail and determining a grinding area. When the rail top is worn or generates plastic deformation, the stability of the vehicle is reduced, the transverse moving amplitude of the wheel set is increased, the distribution range of wheel-rail contact points is increased, the contact points are expanded to rail shoulders, and the contact fatigue damage is easy to occur due to the small wheel-rail contact area and large contact stress at the rail shoulders. The linear section wheel tread is mainly contacted with two sections of circular arcs R300mm and R80mm, and the width range of the formed contact area is 40-50 mm. Therefore, to ensure the stability of the straight section, the critical speed of the vehicle is made higher than the running speed. The average abrasion molded surface of the wheel tread is obtained by largely investigating and researching the abrasion data of the wheel tread of the common-speed railway, the reasonable equivalent taper is kept as the target, the rail grinding target profile is designed, and the inner groove surface is formulated.
A straight line district section rail template of polishing of ordinary speed railway, as preferred mode, the inner groovy includes first end curved surface, second end curved surface and functional curved surface, first end curved surface and second end curved surface set up in functional curved surface both ends to radial 6 equidivisions of functional curved surface, the mid point height that uses 6 equidivide points is horizontal line, the extreme point and the equidivide point height of functional curved surface from left to right are-2.9 mm, -0.4mm, 0.17mm, 0mm, -0.5mm, -1.9mm, -5.81 mm.
A general fast railway straight line district section rail template of polishing, as preferred mode, set up indent trench position at the measuring template body and be provided with the scale mark that is used for instructing rail section profile angle.
The scale marks mark the corresponding angle of each polishing area, and can be used for guiding the angle adjustment of the polishing motor on site.
A general fast railway straight line district section rail template of polishing, as preferred mode, location portion includes vertical location portion and horizontal location portion, vertical location portion and horizontal location portion be with the cube board of template body aequilate, vertical location portion and horizontal location portion set up perpendicularly.
The transverse positioning part is used for contacting the rail waist at the non-working side to realize transverse positioning of the template. Vertical location portion is used for contacting the rail upper surface, realizes the vertical location of template, and this template of polishing realizes the location with rail self rail end and web, does not receive track geometric dimensions's such as track level, gauge, height, direction, superelevation influence.
A general fast railway straight line district section rail template of polishing, as preferred mode, vertical location portion and connection template side collineation.
A general fast railway straight line district section rail template of polishing, as preferred mode, 0 groove of scale mark sets up in highly being 0.17 mm's halving point position.
A general fast railway straight line district section rail template of polishing, as preferred mode, vertical location portion, horizontal location portion, survey template and connection template thickness equal, vertical location portion, horizontal location portion and connection template side collineation.
The utility model discloses beneficial effect as follows:
(1) the vertical positioning of the template is realized by arranging the vertical positioning part, and the polishing template realizes the positioning by the rail bottom and the rail waist of the steel rail and is not influenced by the geometric dimensions of the rails such as the level, the gauge, the height, the direction, the superelevation and the like of the rails;
(2) the transverse positioning of the template is realized by arranging a transverse positioning part to contact the rail web at the non-working side;
(3) the steel rail after being polished can better adapt to the operation environment of the ordinary speed railway through the optimized polishing target profile, the contact area is increased, the contact stress is reduced, a proper wheel diameter difference is provided, the curve passing performance is improved, and the development rate of abrasion and contact damage is reduced.
Drawings
FIG. 1 is a schematic view of a rail grinding template for a straight section of a conventional railway;
FIG. 2 is a schematic view of a template body of a grinding template for steel rails in a straight section of a conventional speed railway;
FIG. 3 is a schematic view of a general speed railway straight line section steel rail grinding template measuring template;
FIG. 4 is a schematic view of a groove in a grinding template for a steel rail in a straight section of a conventional speed railway;
FIG. 5 is a schematic view of a general speed railway straight line section steel rail grinding template positioning part;
FIG. 6 is a schematic diagram of a grinding target profile curve of a grinding template for a steel rail in a straight section of a general speed railway.
Reference numerals:
1. a template body; 11. measuring the template; 111. measuring a template body; 112. an inner groove; 1121. a first end curved surface; 1122. a second end curved surface; 1123. a functional curved surface; 12. Connecting the templates; 2. a positioning part; 21. a vertical positioning part; 22. a transverse positioning portion.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example 1
As shown in fig. 1, the grinding template for the steel rail in the straight line section of the ordinary speed railway comprises a template body 1 and a positioning part 2, wherein the template body 1 is arranged at the upper end of the positioning part 2, and the template body 1 is plate-shaped.
As shown in fig. 2, the formwork body 1 includes a measuring formwork 11 and a connecting formwork 12, the measuring formwork 11 and the connecting formwork 12 are both rectangular plate-shaped structures, the connecting formwork 12 and the measuring formwork 11 are arranged vertically on the same plate surface, a short side of the measuring formwork 11 and a long side of the connecting formwork 12 are collinear, the length of the long side of the measuring formwork 11 is greater than the length of the short side of the connecting formwork 12
As shown in fig. 3, the measuring template 11 includes a measuring template body 111 and an inner groove 112, the inner groove 112 is disposed at a long side position inside the measuring template 11, and a groove surface of the inner groove 112 is an irregular curved surface.
As shown in fig. 4, the inner groove 112 includes a first end curved surface 1121, a second end curved surface 1122 and a functional curved surface 1123, the first end curved surface 1121 and the second end curved surface 1122 are disposed at both ends of the functional curved surface 1123, equally divided in the radial direction of the functional curved surface 1123, and the height of the middle point of the 6 equally divided point is taken as a horizontal line, and the height of the end point and the equally divided point of the functional curved surface 1123 from left to right are-2.9 mm, -0.4mm, 0.17mm, 0mm, -0.5mm, -1.9mm, -5.81 mm.
And scale marks for indicating the profile angle of the section of the steel rail are arranged at the positions of the inner grooves 112 arranged on the measuring template body 111.
As shown in fig. 5, the positioning portion 2 includes a vertical positioning portion 21 and a horizontal positioning portion 22, the vertical positioning portion 21 and the horizontal positioning portion 22 are cube plates having the same width as the template body 1, and the vertical positioning portion 21 and the horizontal positioning portion 22 are vertically disposed.
The vertical positioning portion 21 is collinear with the side of the connecting template 12.
The 0 scale line of the scale mark is arranged at the position of an equal division point with the height of 0.17 mm.
The vertical positioning part 21, the transverse positioning part 22, the measuring template 11 and the connecting template 12 are equal in thickness, and the side edges of the vertical positioning part 21, the transverse positioning part 22 and the connecting template 12 are collinear.
The cross-sectional profile of the inner groove 112 is the grinding target profile. The principle of curve formulation is as follows:
the general-speed railway needs to run a general-speed passenger train and a freight train with the axle weight below 25t, the initial wheel profiles of the two types of vehicles are LM-shaped treads, but the requirements of suspension parameters and dynamic performance indexes of the two types of vehicles are different, the influence degrees of the wheel treads on the dynamic performance of the vehicles after being worn are different, and therefore, when the rail grinding target profile is matched with the wheel treads with different wear degrees, the stability of the freight train can be considered, and the stability of the passenger train can be ensured.
The general speed railway mainly adopts 60kg/m steel rail, the rail top R13mm + R80mm + R300mm + R80mm + R13mm five sections of circular arcs form, the wheel tread of the straight line section is mainly contacted with the two sections of circular arcs R300mm and R80mm, and the width range of the formed contact area is 40-50 mm. When the rail top is worn or generates plastic deformation, the stability of the vehicle is reduced, the transverse moving amplitude of the wheel set is increased, the distribution range of wheel-rail contact points is increased, the contact points are expanded to rail shoulders, and the contact fatigue damage is easy to occur due to the small wheel-rail contact area and large contact stress at the rail shoulders.
Therefore, the average abrasion molded surface of the wheel tread is obtained by largely investigating and researching the abrasion data of the wheel tread of the common-speed railway, and the rail grinding target profile is designed to form the groove surface of the inner groove 112 with the aim of keeping reasonable equivalent taper.
The rail template of polishing of this embodiment guides the scene to polish, and to polish the train for example 96, the rail surface contact damage can effectively be clear away to the straight line section 1 ~ 2 times of polishing, improves wheel rail contact state, improves straight line stability.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The utility model provides a general fast railway straight line section rail template of polishing which characterized in that: the template comprises a template body (1) and a positioning part (2), wherein the template body (1) is arranged at the upper end of the positioning part (2), and the template body (1) is plate-shaped; the template body (1) comprises a measuring template (11) and a connecting template (12), the measuring template (11) and the connecting template (12) are both rectangular plate-shaped structures, the connecting template (12) and the measuring template (11) are arranged vertically on the same plate surface, one short side of the measuring template (11) is collinear with one long side of the connecting template (12), and the length of the long side of the measuring template (11) is greater than that of the short side of the connecting template (12); the measuring template (11) comprises a measuring template body (111) and an inner groove (112), the inner groove (112) is formed in the long side position of the inner side of the measuring template (11), and the groove surface of the inner groove (112) is an irregular curved surface.
2. The grinding template for the steel rails of the straight section of the ordinary speed railway according to claim 1, which is characterized in that: the inner groove (112) comprises a first end curved surface (1121), a second end curved surface (1122) and a functional curved surface (1123), the first end curved surface (1121) and the second end curved surface (1122) are arranged at two ends of the functional curved surface (1123), the functional curved surface (1123) is equally divided in the radial direction by 6, the height of the middle point of the 6 equal division point is taken as a horizontal line, and the heights of the end point and the equal division point of the functional curved surface (1123) from left to right are-2.9 mm, -0.4mm, 0.17mm, 0mm, -0.5mm, -1.9mm and-5.81 mm.
3. The grinding template for the steel rails of the straight section of the ordinary speed railway according to claim 2, wherein the grinding template comprises the following components: and scale marks for indicating the profile angle of the section of the steel rail are arranged at the position of the measuring template body (111) where the inner groove (112) is arranged.
4. The grinding template for the steel rails of the straight section of the ordinary speed railway according to claim 1, which is characterized in that: the positioning part (2) comprises a vertical positioning part (21) and a transverse positioning part (22), the vertical positioning part (21) and the transverse positioning part (22) are cube plates with the same width as the template body (1), and the vertical positioning part (21) and the transverse positioning part (22) are vertically arranged.
5. The grinding template for the steel rails of the straight section of the ordinary speed railway according to claim 4, wherein the grinding template comprises the following components: the vertical positioning part (21) is collinear with the side edge of the connecting template (12).
6. The grinding template for the steel rails of the straight section of the ordinary speed railway according to claim 3, wherein the grinding template comprises the following components: and the 0 scale line of the scale mark is arranged at the position of the equal division point with the height of 0.17 mm.
7. The grinding template for the steel rails of the straight section of the ordinary speed railway according to claim 4, wherein the grinding template comprises the following components: the thickness of the vertical positioning part (21), the thickness of the transverse positioning part (22), the thickness of the measuring template (11) and the thickness of the connecting template (12) are equal, and the side edges of the vertical positioning part (21), the thickness of the transverse positioning part (22) and the connecting template (12) are collinear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922227001.0U CN211897638U (en) | 2019-12-12 | 2019-12-12 | Grinding template for steel rail in straight section of ordinary speed railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922227001.0U CN211897638U (en) | 2019-12-12 | 2019-12-12 | Grinding template for steel rail in straight section of ordinary speed railway |
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| Publication Number | Publication Date |
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| CN211897638U true CN211897638U (en) | 2020-11-10 |
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| CN201922227001.0U Active CN211897638U (en) | 2019-12-12 | 2019-12-12 | Grinding template for steel rail in straight section of ordinary speed railway |
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