Vehicle-mounted long-distance centering equipment for flash welding and heat treatment

Abstract

The utility model discloses long-distance centering equipment for vehicle-mounted flash welding and heat treatment, which comprises two movable frame auxiliary centering devices and two static frame auxiliary centering devices, wherein the two movable frame auxiliary centering devices and the two static frame auxiliary centering devices are positioned on a welding operation flat car; wherein the two movable frame auxiliary centering devices are used for clamping a steel rail b to be welded, the head of the steel rail b is located at a welding station in a flash welding machine, and the distance between the two movable frame auxiliary centering devices is larger than 1 meter; the two static frame auxiliary centering devices are used for clamping a to-be-welded steel rail a with the tail located at a welding station in the flash welding machine, and the distance between the two static frame auxiliary centering devices is larger than 1 meter. According to the vehicle-mounted flash welding and heat treatment long-distance centering equipment provided by the utility model, the steel rail to be welded is kept in a clamping state in the whole process from flash welding to heat treatment, so that the long-distance centering of the steel rail in the flash welding and heat treatment process is realized, and the straightness quality of a joint after welding and heat treatment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail welding, and more specifically, to a long-distance centering device for on-vehicle flash welding and heat treatment. Background Art

[0002] The on-vehicle rail flash welding system is arranged on a railway flat car and has two parallel rail welding production lines.

[0003] Currently, in on-vehicle welding, welding and heat treatment are at the same working station. During the welding process, pressure is maintained (the rails to be welded complete the entire welding process while being clamped), and the heat treatment process is completed in a non-pressure-maintaining state (the rails to be heat-treated complete the entire heat treatment process in a free state with the clamps loosened). This heating and cooling process in the non-pressure-maintaining state will have an adverse effect on the straightness of the rail welding joint.

[0004] Two rails to be welded (the tail of rail a and the head of rail b) need to be centered (aligned) before welding. The centering of existing on-vehicle welding is greatly affected by the state of long rails. Under the conditions of line superelevation and small curve radius, a 500-meter long rail will slide to one side of the welding machine under the action of gravity and line bending, and its shape will be curved. Therefore, the clamping mechanism inside the welding machine only clamps at a distance of 1 m from the rail end, and it cannot push the 500-meter long rail for effective centering, resulting in serious side bending and misalignment of the rails. In addition, the heat treatment process is completed in a non-pressure-maintaining state (the rails to be heat-treated complete the entire heat treatment process in a free state with the clamps loosened), that is, during heat treatment, the rails are not clamped. At this time, the rails to be welded are prone to heat treatment under non-centered conditions, which will reduce the straightness of the welding joint. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a long-distance centering device for on-vehicle flash welding and heat treatment, so as to ensure that the rails to be welded remain clamped throughout the process from flash welding to heat treatment, thereby realizing long-distance centering of the rails during flash welding and heat treatment, and improving the straightness quality of the welding joint after welding and heat treatment.

[0006] Based on the above purpose, the present utility model provides a long-distance centering device for on-vehicle flash welding and heat treatment, including two moving frame auxiliary centering devices and two static frame auxiliary centering devices, both of which are located on a welding operation flat car, wherein: the two moving frame auxiliary centering devices are used to clamp the rail b to be welded with its head located at the welding station inside the flash welding machine, and the distance between the two moving frame auxiliary centering devices is greater than 1 m; the two static frame auxiliary centering devices are used to clamp the rail a to be welded with its tail located at the welding station inside the flash welding machine, and the distance between the two static frame auxiliary centering devices is greater than 1 m.

[0007] Optionally, it further includes a rail pushing device located on the flat car for rail feeding operation. The rail pushing device is used to push the rail b to be welded, and the distance between the rail pushing device and the weld of the flash butt welder is greater than 1 meter. The rail pushing device is used to resist the sliding of the rail b to be welded along the direction perpendicular to the length of the rail b to be welded in the curve section.

[0008] Optionally, the moving frame auxiliary centering device includes a moving support and a moving frame vertical upper limit wheel, a vertically liftable moving frame vertical lower limit wheel, a left horizontal moving frame limit wheel, a right horizontal moving frame limit wheel, a moving frame claw device, a moving frame rail bottom positioning table, a first moving frame return spring, a second moving frame return spring, and a moving frame sliding shaft, all of which are installed on the moving support. The moving frame vertical upper limit wheel, the moving frame vertical lower limit wheel, the left horizontal moving frame limit wheel, and the right horizontal moving frame limit wheel define a first limit space for the rail b to be welded to pass through. The moving support includes a first cross beam. The moving frame claw device includes a first left clamping arm and a first right clamping arm. The first left clamping arm and the first right clamping arm are installed on the first cross beam in a manner that they can be opened or closed simultaneously. A raised first left claw head is provided on the first left clamping arm. The first left claw head includes a first left side surface and a first left bottom surface. The first left side surface is used to abut against the left side edge of the rail bottom of the rail b to be welded, and the first left bottom surface is used to abut against the upper left surface of the rail bottom corner of the rail b to be welded. A raised first right claw head is provided on the first right clamping arm. The first right claw head includes a first right side surface and a first right bottom surface. The first right side surface is used to abut against the right side edge of the rail bottom of the rail b to be welded, and the first right bottom surface is used to abut against the upper right surface of the rail bottom corner of the rail b to be welded. The moving frame rail bottom positioning table is installed on the first cross beam, and the height of the upper surface of the moving frame rail bottom positioning table from the horizontal plane is lower than the height of the bottom surface of the rail b to be welded located in the first limit space from the horizontal plane. The middle of the moving frame sliding shaft is installed on the first cross beam. The first cross beam and the moving frame claw device are both slidably arranged along the moving frame sliding shaft. The first moving frame return spring and the second moving frame return spring are respectively compressively installed at both ends of the moving frame sliding shaft.

[0009] Optionally, the moving frame claw device further includes a first hydraulic cylinder. The piston rod of the first hydraulic cylinder is installed on the first right clamping arm. The first left clamping arm and the first right clamping arm are rotatably installed on the first cross beam. A first left meshing tooth is provided on the side of the first left clamping arm facing the first right clamping arm, and a first right meshing tooth that cooperates with the first left meshing tooth is provided on the side of the first right clamping arm facing the first left clamping arm.

[0010] Optionally, there are two movable frame sliding shafts, two first movable frame return springs, and two second movable frame return springs. The two movable frame sliding shafts are installed at both ends of the first crossbeam in a relatively arranged manner.

[0011] Optionally, the movable frame auxiliary centering device further includes a second hydraulic cylinder and a first frame. The piston rod of the second hydraulic cylinder is installed on the first frame, and the movable frame vertical lower limit wheel is installed on the first frame. The telescopic movement of the piston rod of the second hydraulic cylinder drives the frame and the movable frame vertical lower limit wheel to lift and lower together.

[0012] Optionally, both the first left bottom surface and the first right bottom surface are arc-shaped surfaces.

[0013] Optionally, the stationary frame auxiliary centering device includes a stationary support, a stationary frame vertical upper limit wheel, a vertically liftable stationary frame vertical lower limit wheel, a left horizontal stationary frame limit wheel, a right horizontal stationary frame limit wheel, a stationary frame jaw device, and a stationary frame rail bottom positioning table, all of which are installed on the stationary support. The stationary frame vertical upper limit wheel, the stationary frame vertical lower limit wheel, the left horizontal stationary frame limit wheel, and the right horizontal stationary frame limit wheel define a second limit space for the rail to be welded a to pass through. The stationary frame jaw device includes a second left clamping arm and a second right clamping arm. The stationary support includes a second crossbeam. The second left clamping arm and the second right clamping arm are installed on the second crossbeam so as to be able to open or close simultaneously. A protruding second left jaw head is provided on the second left clamping arm. The second left jaw head includes a second left side surface and a second left bottom surface. The second left side surface is used to abut against the left side edge of the rail bottom of the rail to be welded a, and the second left bottom surface is used to abut against the upper surface of the left side of the rail bottom angle of the rail to be welded a. A protruding second right jaw head is provided on the second right clamping arm. The second left jaw head includes a second right side surface and a second right bottom surface. The second right side surface is used to abut against the right side edge of the rail bottom of the rail to be welded a, and the second right bottom surface is used to abut against the upper surface of the right side of the rail bottom angle of the rail to be welded a. The stationary frame rail bottom positioning table is installed on the second crossbeam, and the height of the upper surface of the stationary frame rail bottom positioning table from the horizontal plane is lower than the height of the bottom surface of the rail to be welded a located in the second limit space from the horizontal plane.

[0014] Optionally, the stationary frame jaw device further includes a third hydraulic cylinder. The second left clamping arm and the second right clamping arm are rotatably installed on the second crossbeam. The piston rod of the third hydraulic cylinder is installed on the second right clamping arm. A second left meshing tooth is provided on the side of the second left clamping arm facing the second right clamping arm, and a second right meshing tooth that cooperates with the second left meshing tooth is provided on the side of the second right clamping arm facing the second left clamping arm.

[0015] Optionally, the static frame auxiliary centering device further includes a fourth hydraulic cylinder and a second frame. The piston rod of the fourth hydraulic cylinder is installed on the second frame, and the static frame vertical lower limit wheel is installed on the second frame. The telescopic movement of the piston rod of the fourth hydraulic cylinder drives the second frame and the static frame vertical lower limit wheel to move up and down together.

[0016] Optionally, the rail pushing device includes a rail pushing bracket, a base, a rail pushing vertical upper limit wheel, a rail pushing vertical lower limit wheel, a left horizontal rail pushing limit wheel, a right horizontal rail pushing limit wheel, and a rail pushing oil cylinder, all of which are installed on the rail pushing bracket. The rail pushing vertical upper limit wheel, the rail pushing vertical lower limit wheel, the left horizontal rail pushing limit wheel, and the right horizontal rail pushing limit wheel define a third limit space for the to-be-welded rail b to pass through. A dovetail slideway is arranged on the base, and the dovetail slideway is perpendicular to the conveying direction of the rail b. The rail pushing oil cylinder includes a cylinder body and a telescopic rod that is drivingly connected to the cylinder body. The cylinder body is installed on the base, and the telescopic rod is installed on the rail pushing bracket. The rail pushing bracket is slidably installed on the dovetail slideway, and the telescopic movement of the telescopic rod drives the rail pushing bracket, the rail pushing vertical upper limit wheel, the rail pushing vertical lower limit wheel, the left horizontal rail pushing limit wheel, and the right horizontal rail pushing limit wheel to be slidably arranged along a direction perpendicular to the conveying direction of the to-be-welded rail b.

[0017] Optionally, the moving frame auxiliary centering device, the static frame auxiliary centering device, and the rail pushing device are all provided with four-way guide wheels.

[0018] The long-distance centering device for on-vehicle flash welding and heat treatment provided by the present utility model includes two moving frame auxiliary centering devices and two static frame auxiliary centering devices, both of which are located on a welding operation flatbed vehicle. First, the tail of the to-be-welded rail a and the head of the to-be-welded rail b are both transported to the welding station inside the flash welding machine. Then, two moving frame auxiliary centering devices are used to clamp the to-be-welded rail b, and the distance between the two moving frame auxiliary centering devices is greater than 1 meter. At the same time, two static frame auxiliary centering devices are used to clamp the to-be-welded rail a, and the distance between the two static frame auxiliary centering devices is greater than 1 meter. Finally, after the flash welding of the to-be-welded rail a and the to-be-welded rail b is completed, the clamping state of the two moving frame auxiliary centering devices on the to-be-welded rail b and the clamping state of the two static frame auxiliary centering devices on the to-be-welded rail a are continuously maintained to ensure that the to-be-welded rail a and the to-be-welded rail b always remain in a clamped state during the heat treatment process. The long-distance centering device for on-vehicle flash welding and heat treatment provided by the present utility model ensures that the to-be-welded rail remains in a clamped state throughout the entire process from flash welding to heat treatment, thereby realizing the long-distance centering of the rail during the flash welding and heat treatment processes and improving the flatness quality of the welded joint after welding and heat treatment. Description of the Drawings

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the objectives and advantages of the present invention, where:

[0020] Figure 1 Schematic diagram of the long-distance centering device for on-vehicle flash welding and heat treatment according to an embodiment of the present invention installed on a welding operation flatbed truck and a rail feeding operation flatbed truck;

[0021] Figure 2 First view of the moving frame auxiliary centering device in the long-distance centering device for on-vehicle flash welding and heat treatment according to an embodiment of the present invention;

[0022] Figure 3 Second view of the moving frame auxiliary centering device in the long-distance centering device for on-vehicle flash welding and heat treatment according to an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the structure among the first left clamping arm, the first right clamping arm, the first hydraulic cylinder, and the first cross beam in the long-distance centering device for on-vehicle flash welding and heat treatment according to an embodiment of the present invention;

[0024] Figure 5 First view of the static frame auxiliary centering device in the long-distance centering device for on-vehicle flash welding and heat treatment according to an embodiment of the present invention;

[0025] Figure 6 Second view of the static frame auxiliary centering device in the long-distance centering device for on-vehicle flash welding and heat treatment according to an embodiment of the present invention;

[0026] Figure 7 Schematic diagram of the structure of the rail pushing device in the long-distance centering device for on-vehicle flash welding and heat treatment according to an embodiment of the present invention.

[0027] Explanation of reference numerals:

[0028] 1: Welding operation flatbed truck; 2: Rail feeding operation flatbed truck; 3: Moving frame auxiliary centering device; 4: Static frame auxiliary centering device; 5: Rail pushing device; 6: Moving support; 7: Moving frame vertical upper limit wheel; 8: Moving frame vertical lower limit wheel; 9: Left horizontal moving frame limit wheel; 10: Right horizontal moving frame limit wheel; 11: Moving frame jaw device; 12: Moving frame rail bottom positioning table; 13: First moving frame return spring; 14: Second moving frame return spring; 15: Moving frame sliding shaft; 16: First limit space; 17: First crossbeam; 18: First hydraulic cylinder; 19: First left clamping arm; 20: First right clamping arm; 21: First left jaw head; 22: First left side; 23: First left bottom surface; 24: First right jaw head; 25: First right side; 26: First right bottom surface; 27: First left meshing tooth; 28: First right meshing tooth; 29: Second hydraulic cylinder; 30: Frame; 31: Static support; 32: Static frame vertical upper limit wheel; 33: Static frame vertical lower limit wheel; 34: Left horizontal static frame limit wheel; 35: Right horizontal static frame limit wheel; 36: Static frame jaw device; 37: Static frame rail bottom positioning table; 38: Second limit space; 39: Third hydraulic cylinder; 40: Fourth hydraulic cylinder; 41: Second frame; 42: Second crossbeam; 43: Second left jaw head; 44: Second right jaw head; 45: Rail pushing device; 46: Base; 47: Rail pushing vertical upper limit wheel; 48: Rail pushing vertical lower limit wheel; 49: Left horizontal rail pushing limit wheel; 50: Right horizontal rail pushing limit wheel; 51: Third limit space; 52: Dovetail slideway; 53: Rail pushing oil cylinder; 54: Flash welding machine moving frame side; 55: Heat treatment machine; 56: Weld seam; 57: Flash welding static frame side. Detailed implementation mode

[0029] The present utility model will be described in detail below in conjunction with embodiments. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component respectively.

[0030] As Figure 1 shown, the long-distance centering device for on-vehicle flash welding and heat treatment provided by the present utility model includes two moving frame auxiliary centering devices 3 and two static frame auxiliary centering devices 4 both located on the welding operation flatbed truck 1, wherein: the two moving frame auxiliary centering devices 3 are used for clamping the rail b to be welded with its head located at the welding station inside the flash welding machine, and the distance between the two moving frame auxiliary centering devices 3 is greater than 1 meter; the two static frame auxiliary centering devices 4 are used for clamping the rail a to be welded with its tail located at the welding station inside the flash welding machine, and the distance between the two static frame auxiliary centering devices 4 is greater than 1 meter.

[0031] It should be noted that: the flash welding machine and heat treatment equipment are both existing on-line equipment; flash welding includes the moving side 54 of the flash welding machine and the static side 57 of the flash welding machine. The moving side 54 of the flash welding machine is located on one side of the rail b to be welded, and the static side 57 of the flash welding machine is located on one side of the rail a to be welded.

[0032] The long-distance centering equipment for on-vehicle flash welding and heat treatment provided by the present utility model includes two moving frame auxiliary centering devices 3 and two static frame auxiliary centering devices 4 both located on the welding operation flatbed truck 1. First, the tail of the rail a to be welded and the head of the rail b to be welded are both transported to the welding station inside the flash welding machine; then, the two moving frame auxiliary centering devices 3 are used to clamp the rail b to be welded, and the distance between the two moving frame auxiliary centering devices 3 is greater than 1 meter; at the same time, the two static frame auxiliary centering devices 4 are used to clamp the rail a to be welded, and the distance between the two static frame auxiliary centering devices 4 is greater than 1 meter; finally, after the flash welding of the rail a to be welded and the rail b to be welded is completed, the clamping state of the two moving frame auxiliary centering devices 3 on the rail b to be welded and the clamping state of the two static frame auxiliary centering devices 4 on the rail a to be welded are continuously maintained to ensure that the rail a to be welded and the rail b to be welded are always in a clamped state during the heat treatment process. The long-distance centering equipment for on-vehicle flash welding and heat treatment provided by the present utility model ensures that the rail to be welded remains in a clamped state throughout the process from flash welding to heat treatment, thereby realizing the long-distance centering of the rail during the flash welding and heat treatment processes and improving the flatness quality of the welded joint after welding and heat treatment.

[0033] As Figure 1 shown, it further includes a rail pushing device 5 located on the rail feeding operation flatbed truck 2. The rail pushing device 5 is used to push the rail b to be welded, and the distance between the rail pushing device 5 and the weld 56 of the flash welding machine is greater than 1 meter. The rail pushing device 5 is used to resist the slip of the rail b to be welded in the curve section along the direction perpendicular to the length of the rail b to be welded. In this embodiment, the rail pushing device 5 can push the rail b to be welded towards the welding center line direction to balance the gravity of the rail b to be welded, reduce the influence of the curve of the curved rail, and improve the centering effect of the long-distance centering equipment for on-vehicle flash welding and heat treatment.

[0034] As Figure 2 、 Figure 3 and Figure 4As shown in the figure, the moving frame auxiliary centering device 3 includes a moving support 6, a moving frame vertical upper limit wheel 7, a vertically liftable moving frame vertical lower limit wheel 8, a left horizontal moving frame limit wheel 9, a right horizontal moving frame limit wheel 10, a moving frame jaw device 11, a moving frame rail bottom positioning table 12, a first moving frame return spring 13, a second moving frame return spring 14, and a moving frame sliding shaft 15, all of which are installed on the moving support 6. The moving frame vertical upper limit wheel 7, the moving frame vertical lower limit wheel 8, the left horizontal moving frame limit wheel 9, and the right horizontal moving frame limit wheel 10 define a first limit space 16 for the to-be-welded rail b to pass through. The moving support 6 includes a first cross beam 17. The moving frame jaw device 11 includes a first left clamping arm 19 and a first right clamping arm 20. The first left clamping arm 19 and the first right clamping arm 20 are installed on the first cross beam 17 in a manner that they can be opened or closed simultaneously. A protruding first left jaw head 21 is provided on the first left clamping arm 19. The first left jaw head 21 includes a first left side surface 22 and a first left bottom surface 23. The first left side surface 22 is used to abut against the left side edge of the rail bottom of the to-be-welded rail b, and the first left bottom surface 23 is used to abut against the upper surface of the left side of the rail bottom corner of the to-be-welded rail b. A protruding first right jaw head 24 is provided on the first right clamping arm 20. The first right jaw head 24 includes a first right side surface 25 and a first right bottom surface 26. The first right side surface 25 is used to abut against the right side edge of the rail bottom of the to-be-welded rail b, and the first right bottom surface 26 is used to abut against the upper surface of the right side of the rail bottom corner of the to-be-welded rail b. The moving frame rail bottom positioning table 12 is installed on the first cross beam 17, and the height of the upper surface of the moving frame rail bottom positioning table 12 from the horizontal plane is lower than the height of the bottom surface of the to-be-welded rail b located in the first limit space 16 from the horizontal plane. The middle part of the moving frame sliding shaft 15 is installed on the first cross beam 17. The first cross beam 17 and the moving frame jaw device 11 are both slidably arranged along the moving frame sliding shaft 15. The first moving frame return spring 13 and the second moving frame return spring 14 are respectively compressively installed at both ends of the moving frame sliding shaft 15. Specifically, the first limit space 16 is in an I-shape and is adapted to the cross-section of the to-be-welded rail. In this embodiment, two moving frame auxiliary centering devices 3 can clamp the to-be-welded rail b simultaneously, enabling the to-be-welded rail b to maintain a straight shape within a range of 1 meter, reducing the difficulty of centering inside the flash welding machine. Moreover, the first return spring and the second return spring can enable the moving frame auxiliary centering device 3 to reciprocate with the forward and backward movement of the moving frame side 54 of the flash welding machine, that is, during the entire welding process, the to-be-welded rail b can achieve flash and upsetting actions while being clamped, realizing the centering effect of the long-distance centering device for on-vehicle flash welding and heat treatment.

[0035] As Figure 4As shown in the figure, the moving frame jaw device 11 further includes a first hydraulic cylinder 18. The piston rod of the first hydraulic cylinder 18 is installed on the first right clamping arm 20. The first left clamping arm 19 and the first right clamping arm 20 are rotatably installed on the first cross beam 17. On one side of the first left clamping arm 19 facing the first right clamping arm 20, there is a first left meshing tooth 27. On one side of the first right clamping arm 20 facing the first left clamping arm 19, there is a first right meshing tooth 28 that cooperates with and meshes with the first left meshing tooth 27. Specifically, the first left clamping arm 19 and the first right clamping arm 20 can also be synchronized to open and close by setting the meshing of a gear and a rack, so as to further ensure the synchronous opening and closing between the first left clamping arm 19 and the first right clamping arm 20. The cylinder block of the first hydraulic cylinder 18 can be installed on the first cross beam 17 or on the first left clamping arm 19. In this embodiment, the meshing of the first left meshing tooth 27 and the first right meshing tooth 28 enables the first left clamping arm 19 and the first right clamping arm 20 to move synchronously, that is, it can further ensure that the first left jaw head 21 and the first right jaw head 24 maintain synchronous opening and closing, improving the clamping stability of the moving frame jaw device 11, and thus improving the clamping stability of the long-distance centering device for on-vehicle flash welding and heat treatment.

[0036] As Figure 2 shown, there are two moving frame sliding shafts 15, two first moving frame return springs 13, and two second moving frame return springs 14. The two moving frame sliding shafts 15 are relatively installed at both ends of the first cross beam 17. In this embodiment, when the first return spring and the second return spring are in a compressed state, they can enable the moving frame gripper device to reset after the welded rail completes the welding action, thus preparing for the next welding and improving the convenience of use of the long-distance centering device for on-vehicle flash welding and heat treatment.

[0037] As Figure 3 shown, the moving frame auxiliary centering device 3 further includes a second hydraulic cylinder 29 and a first frame 30. The piston rod of the second hydraulic cylinder 29 is installed on the first frame 30. The moving frame vertical lower limit wheel 8 is installed on the first frame 30. The telescopic movement of the piston rod of the second hydraulic cylinder 29 drives the first frame 30 and the moving frame vertical lower limit wheel 8 to lift and lower together. In this embodiment, the driving method of the hydraulic cylinder is stable and easy to operate, improving the convenience of use of the long-distance centering device for on-vehicle flash welding and heat treatment.

[0038] As Figure 4 shown, both the first left bottom surface 23 and the first right bottom surface 26 are arc-shaped surfaces. In this embodiment, the arc-shaped first left bottom surface 23 and the second right bottom surface can better fit the upper surface of the arc-shaped rail bottom corner of the rail to be welded, improving the clamping stability of the moving frame jaw device 11, and thus improving the clamping stability of the long-distance centering device for on-vehicle flash welding and heat treatment.

[0039] AsFigure 5 and Figure 6 As shown in Figure 6 , the static frame auxiliary centering device 4 includes a static support 31, a static frame vertical upper limit wheel 32, a vertically liftable static frame vertical lower limit wheel 33, a left horizontal static frame limit wheel 34, a right horizontal static frame limit wheel 35, a static frame jaw device 36, and a static frame rail bottom positioning table 37, all of which are installed on the static support 31. The static frame vertical upper limit wheel 32, the static frame vertical lower limit wheel 33, the left horizontal static frame limit wheel 34, and the right horizontal static frame limit wheel 35 define a second limit space 38 for the rail a to be welded to pass through. The static frame jaw device 36 includes a second left clamping arm and a second right clamping arm. The static support 31 includes a second cross beam 42. The second left clamping arm and the second right clamping arm are installed on the second cross beam 42 so as to be opened or closed simultaneously. A protruding second left jaw head 43 is provided on the second left clamping arm. The second left jaw head 43 includes a second left side surface and a second left bottom surface. The second left side surface is used to abut against the left side edge of the rail bottom of the rail a to be welded, and the second left bottom surface is used to abut against the upper surface of the left side of the rail bottom angle of the rail a to be welded. A protruding second right jaw head 44 is provided on the second right clamping arm. The second left jaw head 43 includes a second right side surface and a second right bottom surface. The second right side surface is used to abut against the right side edge of the rail bottom of the rail a to be welded, and the second right bottom surface is used to abut against the upper surface of the right side of the rail bottom angle of the rail a to be welded. The static frame rail bottom positioning table 37 is installed on the second cross beam 42, and the height of the upper surface of the static frame rail bottom positioning table 37 from the horizontal plane is lower than the height of the bottom surface of the rail a to be welded located in the second limit space 38 from the horizontal plane. Specifically, the second limit space 38 is in an I shape and is adapted to the cross section of the rail a to be welded. In this embodiment, two static frame auxiliary centering devices 4 can clamp the rail a to be welded simultaneously, enabling the rail a to be welded to maintain a straight shape within a range of 1 meter, reducing the difficulty of centering inside the flash welding machine, and achieving the centering effect of the long-distance centering device for on-vehicle flash welding and heat treatment.

[0040] In an embodiment of the present utility model, the static frame jaw device 36 further includes a third hydraulic cylinder 39. The second left clamping arm and the second right clamping arm are rotatably mounted on the second cross beam 42. The piston rod of the third hydraulic cylinder 39 is mounted on the second right clamping arm. A second left engaging tooth is provided on one side of the second left clamping arm facing the second right clamping arm, and a second right engaging tooth that is engaged with the second left engaging tooth is provided on one side of the second right clamping arm facing the second left clamping arm. The structure of the static frame jaw device 36 can be the same as that of the moving frame jaw device 11. Specifically, the second left clamping arm and the second right clamping arm can also be provided with the engagement of a gear and a rack to further ensure the synchronous opening and closing between the second left clamping arm and the second right clamping arm. The cylinder block of the third hydraulic cylinder 39 can be mounted on the second cross beam 42 or on the second left clamping arm. The engagement of the second left engaging tooth and the second right engaging tooth enables the second left clamping arm and the second right clamping arm to move synchronously, that is, it can further ensure that the second left jaw head 43 and the second right jaw head 44 maintain synchronous opening and closing, improving the clamping stability of the static frame jaw device 36, and thus improving the clamping stability of the on-vehicle flash welding and heat treatment long-distance centering device.

[0041] As Figure 5 and Figure 6 shown, the static frame auxiliary centering device 4 further includes a fourth hydraulic cylinder 40 and a second frame 41. The piston rod of the fourth hydraulic cylinder 40 is mounted on the second frame 41, and the static frame vertical lower limit wheel 33 is mounted on the second frame 41. The telescopic movement of the piston rod of the fourth hydraulic cylinder 40 drives the second frame 41 and the static frame vertical lower limit wheel 33 to move up and down together. In this embodiment, the driving mode of the hydraulic cylinder is stable and the operation is convenient, improving the usability of the on-vehicle flash welding and heat treatment long-distance centering device.

[0042] As Figure 7As shown in the figure, the rail pushing device 5 includes a rail pushing support 45, a base 46, a vertically upper rail pushing limit wheel 47, a vertically lower rail pushing limit wheel 48, a left horizontally rail pushing limit wheel 49, a right horizontally rail pushing limit wheel 50, and a rail pushing oil cylinder 53, all of which are installed on the rail pushing support 45. The vertically upper rail pushing limit wheel 47, the vertically lower rail pushing limit wheel 48, the left horizontally rail pushing limit wheel 49, and the right horizontally rail pushing limit wheel 50 define a third limit space 51 for the rail b to be welded to pass through. A dovetail slideway 52 is provided on the base 46, and the dovetail slideway 52 is perpendicular to the conveying direction of the rail b. The rail pushing oil cylinder 53 includes a cylinder body and a telescopic rod that is drivingly connected to the cylinder body. The cylinder body is installed on the base 46, and the telescopic rod is installed on the rail pushing support 45. The rail pushing support 45 is slidably installed on the dovetail slideway 52. The telescopic movement of the telescopic rod drives the rail pushing support 45, the vertically upper rail pushing limit wheel 47, the vertically lower rail pushing limit wheel 48, the left horizontally rail pushing limit wheel 49, and the right horizontally rail pushing limit wheel 50 to be slidably arranged along the direction perpendicular to the conveying direction of the rail b to be welded. Specifically, the third limit space 51 is in an I-shape and is adapted to the cross-section of the rail b to be welded. In this embodiment, through the sliding of the rail pushing support 45, the vertically upper rail pushing limit wheel 47, the vertically lower rail pushing limit wheel 48, the left horizontally rail pushing limit wheel 49, and the right horizontally rail pushing limit wheel 50, the rail b to be welded can be horizontally pushed (perpendicular to the length direction of the rail b to be welded) under the action of the rail pushing oil cylinder 53, so as to ensure the resistance to the sliding of the rail b to be welded caused by the super elevation in the curve section and correct the influence of the included angle between two flat cars (the rail conveying operation flat car 2 and the welding operation flat car 1) in the curve section, improving the convenience of use of the long-distance centering device for on-vehicle flash welding and heat treatment.

[0043] In an embodiment of the present utility model, the moving frame auxiliary centering device 3, the static frame auxiliary centering device 4, and the rail pushing device 5 are all provided with four-way guide wheels, improving the flexibility and convenience of the movement of the moving frame auxiliary centering device 3, the static frame auxiliary centering device 4, and the rail pushing device 5, thereby improving the convenience of use of the long-distance centering device for on-vehicle flash welding and heat treatment.

[0044] The long-distance centering device for on-vehicle flash welding and heat treatment provided by the utility model includes two moving frame auxiliary centering devices 3 and two static frame auxiliary centering devices 4, both of which are located on the welding operation flatbed truck 1. First, the tail of the rail a to be welded and the head of the rail b to be welded are both transported to the welding station inside the flash welder. Then, the two moving frame auxiliary centering devices 3 are used to clamp the rail b to be welded, and the distance between the two moving frame auxiliary centering devices 3 is greater than 1 meter. At the same time, the two static frame auxiliary centering devices 4 are used to clamp the rail a to be welded, and the distance between the two static frame auxiliary centering devices 4 is greater than 1 meter. Finally, after the flash welding of the rail a to be welded and the rail b to be welded is completed, the clamping state of the two moving frame auxiliary centering devices 3 on the rail b to be welded and the clamping state of the two static frame auxiliary centering devices 4 on the rail a to be welded are continuously maintained to ensure that the rail a to be welded and the rail b to be welded always remain in the clamped state during the heat treatment process. The long-distance centering device for on-vehicle flash welding and heat treatment provided by the utility model ensures that the rail to be welded remains in the clamped state throughout the process from flash welding to heat treatment, thereby realizing the long-distance centering of the rail during the flash welding and heat treatment processes and improving the flatness quality of the welded joint after welding and heat treatment.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A long-distance centering device for on-vehicle flash welding and heat treatment, characterized in that, It includes two movable frame auxiliary centering devices and two fixed frame auxiliary centering devices, both of which are located on the welding operation flatbed vehicle. Among them: The two movable frame auxiliary centering devices are used to clamp the rail b to be welded with its head located at the welding station inside the flash welding machine, and the distance between the two movable frame auxiliary centering devices is greater than 1 meter; The two fixed frame auxiliary centering devices are used to clamp the rail a to be welded with its tail located at the welding station inside the flash welding machine, and the distance between the two fixed frame auxiliary centering devices is greater than 1 meter.

2. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 1, characterized in that, It also includes a rail pushing device located on the rail feeding operation flatbed vehicle. The rail pushing device is used to push the rail b to be welded, and the distance between the rail pushing device and the weld of the flash welding machine is greater than 1 meter. The rail pushing device is used to resist the slip of the rail b to be welded along the length direction perpendicular to the rail b to be welded in the curve section.

3. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 1, wherein The movable frame auxiliary centering device includes a movable support, a movable frame vertical upper limit wheel, a vertically liftable movable frame vertical lower limit wheel, a left horizontal movable frame limit wheel, a right horizontal movable frame limit wheel, a movable frame jaw device, a movable frame rail bottom positioning table, a first movable frame return spring, a second movable frame return spring, and a movable frame sliding shaft, all of which are installed on the movable support. The movable frame vertical upper limit wheel, the movable frame vertical lower limit wheel, the left horizontal movable frame limit wheel, and the right horizontal movable frame limit wheel define a first limit space for the rail b to be welded to pass through. The movable support includes a first cross beam. The movable frame jaw device includes a first left clamping arm and a first right clamping arm. The first left clamping arm and the first right clamping arm are installed on the first cross beam so as to be able to open or close simultaneously. A convex first left jaw head is provided on the first left clamping arm. The first left jaw head includes a first left side surface and a first left bottom surface. The first left side surface is used to abut against the left side edge of the rail bottom of the rail b to be welded, and the first left bottom surface is used to abut against the upper surface of the left side of the rail bottom angle of the rail b to be welded. A convex first right jaw head is provided on the first right clamping arm. The first right jaw head includes a first right side surface and a first right bottom surface. The first right side surface is used to abut against the right side edge of the rail bottom of the rail b to be welded, and the first right bottom surface is used to abut against the upper surface of the right side of the rail bottom angle of the rail b to be welded. The movable frame rail bottom positioning table is installed on the first cross beam, and the height of the upper surface of the movable frame rail bottom positioning table from the horizontal plane is lower than the height of the bottom surface of the rail b to be welded located in the first limit space from the horizontal plane. The middle of the movable frame sliding shaft is installed on the first cross beam. The first cross beam and the movable frame jaw device are both slidably arranged along the movable frame sliding shaft. The first movable frame return spring and the second movable frame return spring are respectively installed at both ends of the movable frame sliding shaft in a compressed manner.

4. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 3, characterized in that, The movable frame jaw device further includes a first hydraulic cylinder. The piston rod of the first hydraulic cylinder is installed on the first right clamping arm. The first left clamping arm and the first right clamping arm are rotatably installed on the first cross beam. A first left meshing tooth is provided on one side of the first left clamping arm facing the first right clamping arm, and a first right meshing tooth that is meshed with the first left meshing tooth is provided on one side of the first right clamping arm facing the first left clamping arm.

5. The on-vehicle long-distance centering device for flash welding and heat treatment according to claim 3, characterized in that, There are two movable frame sliding shafts, two first movable frame return springs, and two second movable frame return springs. The two movable frame sliding shafts are oppositely installed at both ends of the first cross beam.

6. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 3, characterized in that, The movable frame auxiliary centering device further includes a second hydraulic cylinder and a first frame. The piston rod of the second hydraulic cylinder is installed on the first frame. The movable frame vertical lower limit wheel is installed on the first frame. The telescopic movement of the piston rod of the second hydraulic cylinder drives the first frame and the movable frame vertical lower limit wheel to lift and lower together.

7. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 3, wherein Both the first left bottom surface and the first right bottom surface are arc-shaped surfaces.

8. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 1, characterized in that, The static frame auxiliary centering device includes a static support, a static frame vertical upper limit wheel, a vertically liftable static frame vertical lower limit wheel, a left horizontal static frame limit wheel, a right horizontal static frame limit wheel, a static frame jaw device, and a static frame rail bottom positioning table, all of which are installed on the static support. The static frame vertical upper limit wheel, the static frame vertical lower limit wheel, the left horizontal static frame limit wheel, and the right horizontal static frame limit wheel define a second limit space for the to-be-welded rail a to pass through. The static frame jaw device includes a second left clamping arm and a second right clamping arm. The static support includes a second cross beam. The second left clamping arm and the second right clamping arm are installed on the second cross beam so that they can be opened or closed simultaneously. A convex second left jaw head is provided on the second left clamping arm. The second left jaw head includes a second left side surface and a second left bottom surface. The second left side surface is used to abut against the left side edge of the rail bottom of the to-be-welded rail a, and the second left bottom surface is used to abut against the upper surface of the left side of the rail bottom corner of the to-be-welded rail a. A convex second right jaw head is provided on the second right clamping arm. The second right jaw head includes a second right side surface and a second right bottom surface. The second right side surface is used to abut against the right side edge of the rail bottom of the to-be-welded rail a, and the second right bottom surface is used to abut against the upper surface of the right side of the rail bottom corner of the to-be-welded rail a. The static frame rail bottom positioning table is installed on the second cross beam, and the height of the upper surface of the static frame rail bottom positioning table from the horizontal plane is lower than the height of the bottom surface of the to-be-welded rail a located in the second limit space from the horizontal plane.

9. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 8, characterized in that, The static frame jaw device further includes a third hydraulic cylinder. The second left clamping arm and the second right clamping arm are rotatably installed on the second cross beam. The piston rod of the third hydraulic cylinder is installed on the second right clamping arm. A second left meshing tooth is provided on one side of the second left clamping arm facing the second right clamping arm, and a second right meshing tooth that is meshed with the second left meshing tooth is provided on one side of the second right clamping arm facing the second left clamping arm.

10. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 8, characterized in that, The static frame auxiliary centering device further includes a fourth hydraulic cylinder and a second frame. The piston rod of the fourth hydraulic cylinder is installed on the second frame, and the static frame vertical lower limit wheel is installed on the second frame. The telescopic movement of the piston rod of the fourth hydraulic cylinder drives the second frame and the static frame vertical lower limit wheel to lift and lower together.

11. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 2, characterized in that, The rail pushing device includes a rail pushing bracket, a base, and a rail pushing vertical upper limit wheel, a rail pushing vertical lower limit wheel, a left horizontal rail pushing limit wheel, a right horizontal rail pushing limit wheel, and a rail pushing oil cylinder that are all installed on the rail pushing bracket. The rail pushing vertical upper limit wheel, the rail pushing vertical lower limit wheel, the left horizontal rail pushing limit wheel, and the right horizontal rail pushing limit wheel define a third limit space for the to-be-welded rail b to pass through. A dovetail slideway is provided on the base, and the dovetail slideway is perpendicular to the conveying direction of the rail b. The rail pushing oil cylinder includes a cylinder body and a telescopic rod that is drivingly connected to the cylinder body. The cylinder body is installed on the base, and the telescopic rod is installed on the rail pushing bracket. The rail pushing bracket is slidably installed on the dovetail slideway, and the telescopic movement of the telescopic rod drives the rail pushing bracket, the rail pushing vertical upper limit wheel, the rail pushing vertical lower limit wheel, the left horizontal rail pushing limit wheel, and the right horizontal rail pushing limit wheel to be slidably arranged along the direction perpendicular to the conveying direction of the to-be-welded rail b.

12. The long-distance centering device for on-vehicle flash welding and heat treatment according to claim 2, characterized in that, The moving frame auxiliary centering device, the static frame auxiliary centering device, and the rail pushing device are all provided with four-way guide wheels.

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