CN111570988B - Tramcar turnout flash welding method - Google Patents
Tramcar turnout flash welding method Download PDFInfo
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- CN111570988B CN111570988B CN202010546017.2A CN202010546017A CN111570988B CN 111570988 B CN111570988 B CN 111570988B CN 202010546017 A CN202010546017 A CN 202010546017A CN 111570988 B CN111570988 B CN 111570988B
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- extension steel
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- 238000003466 welding Methods 0.000 title claims abstract description 268
- 238000000034 method Methods 0.000 title claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 114
- 239000010959 steel Substances 0.000 claims abstract description 114
- 239000000463 material Substances 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003832 thermite Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/04—Flash butt welding
- B23K11/046—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a tram turnout flash welding method, which comprises a tram turnout flash welding inverted welding device, wherein the welding method is divided into an upright welding process and an inverted welding process. The present invention realizes that the tramway turnout and the extension steel rail with different types of structures can be welded by flash, the flash welding has high automation degree relative to arc welding and thermite welding, and the welding joint quality is more stable and reliable. By adopting the invention, the same railroad switch lengthening steel rail is welded by flash, the production efficiency is improved, the appearance of the finished product is more unified and attractive, and the design difficulty of the seamless track tram railroad switch is reduced.
Description
Technical Field
The invention relates to the technical field of tram tracks, in particular to a tram turnout flash welding method.
Background
At present, in the flash welding production process of a tramcar turnout and a steel rail, workpieces are positively welded, and the flash welding of the turnout and the steel rail with the sizes exceeding the size range of a welding platform of a flash welder cannot be realized, and only seamless connection can be realized by thermite welding, arc welding and other methods, so that the welding method of the same product is different, the manufacturing flow is long, the efficiency is low, and great difficulty is caused to the design of the turnout.
Disclosure of Invention
Aiming at the problems that the existing seamless track tramway turnout has complex and various structure types and large turnout dimension specifications and can not uniformly finish welding on a flash welder, the first aim of the invention is to provide a tramway turnout flash welding inverted welding device.
The invention adopts the following technical scheme: the invention provides a tram switch flash welding method, which comprises a tram switch flash welding inverted welding device.
The tram turnout flash welding method adopts the tram turnout flash welding inverted welding device, and the welding method is divided into an upright welding process and an inverted welding process and specifically comprises the following steps of:
step 1: the method comprises the steps of preparing a tram turnout and an extension steel rail, wherein the tram turnout is of a cross structure and is provided with 4 welding ends, namely a first welding end, a second welding end, a third welding end and a fourth welding end, wherein the first welding end and the fourth welding end are arranged on the same side, the second welding end and the third welding end are arranged on the same side, the first welding end is opposite to the second welding end, and the third welding end is opposite to the third welding end; the number of the extension steel rails is 4, and the extension steel rails are respectively a first extension steel rail, a second extension steel rail, a third extension steel rail and a fourth extension steel rail;
step 2: the method comprises the steps that a first welding end and a first extension steel rail are subjected to forward welding, in the forward welding process, a fixed end backing plate is not placed on a fixed end welding platform, a movable end backing plate is not placed on a movable end welding platform, a tramcar turnout is placed on the fixed end welding platform for positioning and fixing, the first extension steel rail is placed on the movable end welding platform for positioning and fixing, and flash welding is completed after the movable end welding platform moves to butt the first extension steel rail with the first welding end;
step 3: the second welding end and the second extension steel rail are subjected to forward welding, the tramcar turnout is rotated 180 degrees and placed on the fixed end welding platform to be positioned and fixed, the second extension steel rail is placed on the movable end welding platform to be positioned and fixed, at the moment, the second welding end is opposite to the second extension steel rail, and after the movable end welding platform moves to butt-joint the second extension steel rail and the second welding end, flash welding is completed;
step 4: the third welding end and the third extension steel rail are subjected to inverted welding, in the inverted welding process, a fixed end backing plate is placed on a fixed end welding platform and positioned, a movable end backing plate is placed on a movable end welding platform and positioned, and the tramcar turnout after the step 3 is completed is turned upside down, at the moment, the rail top of the tramcar turnout is downward, when the third welding end is placed on the fixed end backing plate, the rail head of the rail top of the third welding end falls on the first step position, and the rail lip of the rail top of the third welding end falls on the first inclined plane;
turning the third extension steel rail upside down, placing the rail top of the third extension steel rail on a movable end backing plate, enabling the rail head of the rail top of the third extension steel rail to fall on a second horizontal plane, enabling the rail lip of the rail top of the third extension steel rail to fall on a second inclined plane, and adjusting the position of the rail top of the third extension steel rail so that the third extension steel rail can be aligned with a third welding end;
after the third extension steel rail is aligned with the third welding end, the movable end welding platform moves to butt joint the third extension steel rail with the third welding end, and then flash welding is completed;
step 5: the fourth welding end and the fourth extension steel rail are subjected to inverted welding, the tram turnout after the step 4 is completed is rotated for 180 degrees, the fourth welding end is placed on the fixed end backing plate, the rail head of the rail top of the fourth welding end falls on the first step position, and the rail lip of the rail top of the fourth welding end falls on the first inclined plane;
turning over and inverting the fourth extension steel rail, placing the rail top of the fourth extension steel rail on a movable end backing plate, enabling the rail head of the rail top of the fourth extension steel rail to fall on a second horizontal plane, enabling the rail lip of the rail top of the fourth extension steel rail to fall on a second inclined plane, and adjusting the position of the rail top of the fourth extension steel rail so that the fourth extension steel rail can be aligned with a fourth welding end;
after the fourth extension steel rail is aligned with the fourth welding end, the movable end welding platform moves to butt the fourth extension steel rail with the fourth welding end, and then flash welding is completed.
The tram turnout flash welding inverted welding device comprises a fixed end backing plate arranged on a flash welding machine fixed end welding platform and a movable end backing plate arranged on a flash welding machine movable end welding platform.
The tram switch flash welding inversion welding set, wherein: the center of the upper surface of the fixed end backing plate is lifted upwards to form a first step position, the first step position is connected with a first inclined surface which is inclined upwards, namely, the upper surface of the fixed end backing plate is divided into a left part and a right part by the first step position, one part is a first horizontal plane, and the other part is the first inclined surface.
The tram switch flash welding inversion welding set, wherein: the right side of the upper surface of the movable end base plate is lifted upwards to form a second step position, and the second step position is connected with a second inclined surface which is inclined upwards, namely the upper surface of the fixed end base plate is divided into a left part and a right part by the second step position, one part is a second horizontal plane, and the other part is a second inclined plane.
The tram switch flash welding inversion welding set, wherein: the front part of the fixed end backing plate and the rear part of the movable end backing plate are made of copper materials, and the rear part of the fixed end backing plate and the front part of the movable end backing plate are made of steel materials.
The beneficial effects of the invention are as follows:
(1) The invention realizes the flash welding of the large-specification tramway turnout and the lengthening steel rail.
(2) The present invention realizes that the tramway turnout and the extension steel rail with different types of structures can be welded by flash, the flash welding has high automation degree relative to arc welding and thermite welding, and the welding joint quality is more stable and reliable.
(3) By adopting the invention, the same railroad switch lengthening steel rail is welded by flash, the production efficiency is improved, the appearance of the finished product is more unified and attractive, and the design difficulty of the seamless track tram railroad switch is reduced.
Drawings
Fig. 1 is a schematic illustration of a prior art tram switch weld size exceeding the weld platform size range of a flash welder.
Fig. 2 is a schematic diagram of a tram switch flash welding inverted welding device.
Fig. 3 is a schematic view of a railroad switch rail top and an extension rail top.
Fig. 4 is a schematic view of a tram switch inverted and placed on a fixed end pad.
Fig. 5 is a schematic view of the extension rail placed on the movable end pad after inversion.
Fig. 6 is a schematic diagram of step 2 of the tram switch flash welding method.
Fig. 7 is a schematic diagram of step 3 of the tram switch flash welding method.
Fig. 8 is a schematic diagram of step 4 of the tram switch flash welding method.
Fig. 9 is a schematic diagram of step 5 of the tram switch flash welding method.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is evident that the described embodiments are only a few embodiments of the present invention and that all other embodiments that a person skilled in the art would obtain without making any inventive effort fall within the scope of the present invention.
Example 1
For flash welder power and configuration reasons, if it is desired to complete all welding of a tram switch using a flash welder, the size of the tram switch cannot exceed the welding platform size range of the flash welder.
As shown in fig. 1, the tram switch 1 has a cross structure, and has 4 welding ends, namely a first welding end 2, a second welding end 3, a third welding end 4 and a fourth welding end 5, wherein the first welding end and the fourth welding end are on the same side, the second welding end and the third welding end are on the same side, the first welding end is opposite to the second welding end, and the third welding end is opposite to the third welding end.
The length-extending steel rails are 4, namely a first length-extending steel rail 6, a second length-extending steel rail 7, a third length-extending steel rail 8 and a fourth length-extending steel rail 9.
In the prior art, when the first welding end 2 and the first extension steel rail 6 are subjected to flash welding, the second welding end 3 and the second extension steel rail 7 are subjected to flash welding, and then the flash welder is used for welding the third welding end 4 and the third extension steel rail 8, the welding seam of the third welding end 4 and the third extension steel rail 8 is required to be placed between two electrodes of a welding platform of the flash welder, but due to the limitation that the width of the welding platform of the flash welder is 480mm, the width of a workpiece in fig. 1 is 676mm, and obviously, the width of the welding platform of the flash welder cannot meet the welding requirement. Therefore, a tramcar turnout flash welding inverted welding device is provided.
Referring to fig. 2 to 5, a railroad switch flash welding inverted welding device includes a fixed end pad 12 disposed on a flash welding machine fixed end welding platform 10 and a movable end pad 13 disposed on a flash welding machine movable end welding platform 11.
The center of the upper surface of the fixed end backing plate is lifted upwards to form a first step position 14, and the first step position is connected with a first inclined surface 15 which is inclined upwards, namely the upper surface of the fixed end backing plate is divided into a left part and a right part by the first step position, one part is a first horizontal surface 16, and the other part is the first inclined surface 15.
The right side of the upper surface of the movable end base plate is lifted upwards to form a second step position 17, and the second step position is connected with a second inclined surface 18 which is inclined upwards, namely the upper surface of the fixed end base plate is divided into a left part and a right part by the second step position, one part is a second horizontal surface 19, and the other part is the second inclined surface 18.
The top surfaces of the tramway turnout and the lengthened steel rail form a groove, so that the tramway turnout and the lengthened steel rail cannot be erected when being inverted and welded on a platform.
The structure of the fixed end pad and the movable end pad can be designed to be upright when the extension rail of the tramway turnout is inverted.
As shown in fig. 4 and 5, the tram switch in fig. 4 is placed on the fixed end pad after being inverted, the rail top of the tram switch is downward, the rail head 21 of the rail top of the tram switch is placed on the first step position, and the rail lip 22 of the rail top of the tram switch is placed on the first inclined surface.
In fig. 5, the extension steel rail is placed on the movable end pad after being inverted, the rail head of the rail top of the extension steel rail falls on the second horizontal plane, the rail lip of the rail top of the extension steel rail falls on the second inclined plane, and the position of the rail top of the extension steel rail can be adjusted appropriately, so that the extension steel rail can be accurately butted with a tram turnout.
The front part of the fixed end backing plate and the rear part of the movable end backing plate are made of copper materials, the rear part of the fixed end backing plate and the front part of the movable end backing plate are made of steel materials, namely, the parts, in the fixed end backing plate and the movable end backing plate, contacted with the electrode are made of copper materials, and the rest parts are made of steel materials. The reason for this is: the copper material portion is in contact with the electrode 20, utilizing the good conductivity of copper, the steel material arrangement can save costs for better soldering results.
The lengths of the fixed end backing plate and the movable end backing plate are moderate, the supporting effect on the workpiece is required to be met, the workpiece can be inclined due to the too short length, and the fixed end backing plate and the movable end backing plate with different sizes are manufactured according to the actual lengths of the workpiece in actual use.
Example 2
Referring to fig. 2 to 9, a tram switch flash welding method, which is an inverted welding device for tram switch flash welding as described in embodiment 1, is used, and the welding method is divided into an upright welding process and an inverted welding process, and specifically includes the following steps:
step 1: the method comprises the steps of preparing a tram turnout and an extension steel rail, wherein the tram turnout is of a cross structure, 4 welding ends are respectively a first welding end 2, a second welding end 3, a third welding end 4 and a fourth welding end 5, the first welding end and the fourth welding end are on the same side, the second welding end and the third welding end are on the same side, the first welding end is opposite to the second welding end, and the third welding end is opposite to the third welding end.
The length-extending steel rails are 4, namely a first length-extending steel rail 6, a second length-extending steel rail 7, a third length-extending steel rail 8 and a fourth length-extending steel rail 9.
Step 2: as shown in fig. 6, the first welding end 2 is welded with the first extension steel rail 6 in a positive manner, in the positive welding process, the fixed end backing plate is not placed on the fixed end welding platform, and the movable end backing plate is not placed on the movable end welding platform. That is, the flash welder in this case is a welder of the prior art.
The tram switch is placed and is fixed in the fixed end welding platform location, and first extension rail is placed and is fixed in the fixed position on the expansion end welding platform, and expansion end welding platform removes and dock first extension rail and first welding end after, accomplishes flash welding.
Step 3: as shown in fig. 7, the second welding end 3 is welded with the second extension steel rail 7 in a forward manner, the tram turnout is rotated 180 degrees and placed on the fixed end welding platform for positioning and fixing, the second extension steel rail is placed on the movable end welding platform for positioning and fixing, at this time, the second welding end is opposite to the second extension steel rail, and after the movable end welding platform moves to butt-joint the second extension steel rail with the second welding end, flash welding is completed.
Step 4: as shown in fig. 8, the third welding end 4 and the third extension rail 8 are welded upside down, and in the process of welding upside down, a fixed end pad is placed and positioned on the fixed end welding platform, and a movable end pad is placed and positioned on the movable end welding platform, that is, the upside-down welding device of embodiment 1 is used.
And 3, turning upside down the tram turnout after the step 3 is finished, wherein at the moment, the rail top of the tram turnout faces downwards, and when the third welding end is placed on the fixed end backing plate, the rail head of the rail top of the third welding end falls on the first step position, and the rail lip of the rail top of the third welding end falls on the first inclined plane. As in fig. 4.
The third welding end is fixed after being positioned.
The third extension rail is turned upside down, the rail top of the third extension rail is placed on the movable end pad, the rail head of the rail top of the third extension rail falls on the second horizontal plane, and the rail lip of the rail top of the third extension rail falls on the second inclined plane, as shown in fig. 5. And adjusting the position of the rail top of the third extension rail so that the third extension rail can be aligned with the third welding end and fixing the third extension rail.
After the third extension steel rail is aligned with the third welding end, the movable end welding platform moves to butt the third extension steel rail with the third welding end, and then flash welding is completed.
Step 5: as shown in fig. 9, the fourth welding end 5 and the fourth extension rail 9 are welded upside down, the tramway switch after the completion of the step 4 is rotated 180 degrees, the fourth welding end is placed on the fixed end pad, the rail head of the fourth welding end is placed on the first step, and the rail lip of the rail head of the fourth welding end is placed on the first inclined surface.
The fourth welding end is fixed after being positioned.
And turning the fourth extension steel rail upside down, placing the rail top of the fourth extension steel rail on a movable end backing plate, enabling the rail head of the rail top of the fourth extension steel rail to fall on a second horizontal plane, enabling the rail lip of the rail top of the fourth extension steel rail to fall on a second inclined plane, adjusting the rail top position of the fourth extension steel rail, enabling the fourth extension steel rail to be aligned with a fourth welding end, and fixing the fourth extension steel rail.
After the fourth extension steel rail is aligned with the fourth welding end, the movable end welding platform moves to butt the fourth extension steel rail with the fourth welding end, and then flash welding is completed.
The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention, so that all equivalent modifications made by the appended claims shall be included in the scope of the present invention.
Claims (1)
1. The tram turnout flash welding method comprises a tram turnout flash welding inverted welding device, and is characterized in that: the welding method is divided into a normal welding process and an inverted welding process, and specifically comprises the following steps:
step 1: the method comprises the steps of preparing a tram turnout and an extension steel rail, wherein the tram turnout is of a cross structure and is provided with 4 welding ends, namely a first welding end, a second welding end, a third welding end and a fourth welding end, wherein the first welding end and the fourth welding end are arranged on the same side, the second welding end and the third welding end are arranged on the same side, the first welding end is opposite to the second welding end, and the third welding end is opposite to the third welding end; the number of the extension steel rails is 4, and the extension steel rails are respectively a first extension steel rail, a second extension steel rail, a third extension steel rail and a fourth extension steel rail;
step 2: the method comprises the steps that a first welding end and a first extension steel rail are subjected to forward welding, in the forward welding process, a fixed end backing plate is not placed on a fixed end welding platform, a movable end backing plate is not placed on a movable end welding platform, a tramcar turnout is placed on the fixed end welding platform for positioning and fixing, the first extension steel rail is placed on the movable end welding platform for positioning and fixing, and flash welding is completed after the movable end welding platform moves to butt the first extension steel rail with the first welding end;
step 3: the second welding end and the second extension steel rail are subjected to forward welding, the tramcar turnout is rotated 180 degrees and placed on the fixed end welding platform to be positioned and fixed, the second extension steel rail is placed on the movable end welding platform to be positioned and fixed, at the moment, the second welding end is opposite to the second extension steel rail, and after the movable end welding platform moves to butt-joint the second extension steel rail and the second welding end, flash welding is completed;
step 4: the third welding end and the third extension steel rail are subjected to inverted welding, in the inverted welding process, a fixed end backing plate is placed on a fixed end welding platform and positioned, a movable end backing plate is placed on a movable end welding platform and positioned, and the tramcar turnout after the step 3 is completed is turned upside down, at the moment, the rail top of the tramcar turnout is downward, when the third welding end is placed on the fixed end backing plate, the rail head of the rail top of the third welding end falls on the first step position, and the rail lip of the rail top of the third welding end falls on the first inclined plane;
turning the third extension steel rail upside down, placing the rail top of the third extension steel rail on a movable end backing plate, enabling the rail head of the rail top of the third extension steel rail to fall on a second horizontal plane, enabling the rail lip of the rail top of the third extension steel rail to fall on a second inclined plane, and adjusting the position of the rail top of the third extension steel rail so that the third extension steel rail can be aligned with a third welding end;
after the third extension steel rail is aligned with the third welding end, the movable end welding platform moves to butt joint the third extension steel rail with the third welding end, and then flash welding is completed;
step 5: the fourth welding end and the fourth extension steel rail are subjected to inverted welding, the tram turnout after the step 4 is completed is rotated for 180 degrees, the fourth welding end is placed on the fixed end backing plate, the rail head of the rail top of the fourth welding end falls on the first step position, and the rail lip of the rail top of the fourth welding end falls on the first inclined plane;
turning over and inverting the fourth extension steel rail, placing the rail top of the fourth extension steel rail on a movable end backing plate, enabling the rail head of the rail top of the fourth extension steel rail to fall on a second horizontal plane, enabling the rail lip of the rail top of the fourth extension steel rail to fall on a second inclined plane, and adjusting the position of the rail top of the fourth extension steel rail so that the fourth extension steel rail can be aligned with a fourth welding end;
after the fourth extension steel rail is aligned with the fourth welding end, the movable end welding platform moves to butt joint the fourth extension steel rail with the fourth welding end, and then flash welding is completed;
the tramcar turnout flash welding inverted welding device comprises a fixed end backing plate arranged on a flash welding machine fixed end welding platform and a movable end backing plate arranged on a flash welding machine movable end welding platform;
the center of the upper surface of the fixed end backing plate is lifted upwards to form a first step position, and the first step position is connected with a first inclined surface which is inclined upwards, namely the first step position divides the upper surface of the fixed end backing plate into a left part and a right part, one part is a first horizontal plane, and the other part is a first inclined surface;
the right side of the upper surface of the movable end base plate is lifted upwards to form a second step position, and the second step position is connected with a second inclined surface which is inclined upwards, namely the upper surface of the fixed end base plate is divided into a left part and a right part by the second step position, one part is a second horizontal plane, and the other part is a second inclined plane;
the front part of the fixed end backing plate and the rear part of the movable end backing plate are made of copper materials, and the rear part of the fixed end backing plate and the front part of the movable end backing plate are made of steel materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546017.2A CN111570988B (en) | 2020-06-16 | 2020-06-16 | Tramcar turnout flash welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546017.2A CN111570988B (en) | 2020-06-16 | 2020-06-16 | Tramcar turnout flash welding method |
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| CN111570988A CN111570988A (en) | 2020-08-25 |
| CN111570988B true CN111570988B (en) | 2023-12-05 |
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| CN113199204B (en) * | 2021-05-06 | 2022-08-12 | 中铁宝桥集团有限公司 | Rapid welding maintenance method for tramcar turnout |
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| CN201906946U (en) * | 2010-11-10 | 2011-07-27 | 中铁山桥集团有限公司 | Assembly welding mould of turnout frog backing plate |
| CN203960688U (en) * | 2014-05-14 | 2014-11-26 | 中铁工程设计咨询集团有限公司 | The fastening devices of a kind of track switch and stock rail thereof |
| CN107116292A (en) * | 2017-06-19 | 2017-09-01 | 中国铁道科学研究院金属及化学研究所 | A kind of fixed flash welder equipment of track flat car |
| CN108884643A (en) * | 2016-04-01 | 2018-11-23 | 普拉塞-陶伊尔铁路机械出口股份有限公司 | The weld assembly of two rails for welded rails |
| CN210194344U (en) * | 2019-06-13 | 2020-03-27 | 中铁山桥集团有限公司 | Turnout rail brace structure for e-shaped elastic strip |
| CN212398463U (en) * | 2020-06-16 | 2021-01-26 | 中铁宝桥集团有限公司 | Tramcar turnout flash welding inversion welding device |
-
2020
- 2020-06-16 CN CN202010546017.2A patent/CN111570988B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201906946U (en) * | 2010-11-10 | 2011-07-27 | 中铁山桥集团有限公司 | Assembly welding mould of turnout frog backing plate |
| CN203960688U (en) * | 2014-05-14 | 2014-11-26 | 中铁工程设计咨询集团有限公司 | The fastening devices of a kind of track switch and stock rail thereof |
| CN108884643A (en) * | 2016-04-01 | 2018-11-23 | 普拉塞-陶伊尔铁路机械出口股份有限公司 | The weld assembly of two rails for welded rails |
| CN107116292A (en) * | 2017-06-19 | 2017-09-01 | 中国铁道科学研究院金属及化学研究所 | A kind of fixed flash welder equipment of track flat car |
| CN210194344U (en) * | 2019-06-13 | 2020-03-27 | 中铁山桥集团有限公司 | Turnout rail brace structure for e-shaped elastic strip |
| CN212398463U (en) * | 2020-06-16 | 2021-01-26 | 中铁宝桥集团有限公司 | Tramcar turnout flash welding inversion welding device |
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| CN111570988A (en) | 2020-08-25 |
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