Flash welding mechanism for variable cross-section steel rail and using method

Abstract

The invention discloses a flash welding mechanism for a variable-cross-section steel rail and a using method.The flash welding mechanism comprises a static frame clamp, a movable frame clamp, an upsetting cylinder, a first clamping cylinder, a second clamping cylinder and a center shaft, a rail top block is installed on the center shaft, a first clamping piece comprises an outer side electrode and an abutting piece, and firstly, a first side face abuts against the rail head side face of the variable-cross-section steel rail; then, the abutting end abuts against the rail head lower jaw of the variable-section steel rail, the spring is installed on the installation end and the outer side electrode in a compressed mode, and the bolt is installed at the installation end in a threaded mode; and finally, the variable-cross-section steel rail is clamped through the first clamping piece, the normal steel rail is clamped through the second clamping piece, the upsetting cylinder drives the upsetting piston rod, and flash welding of the normal steel rail and the variable-cross-section steel rail is achieved. According to the flash welding mechanism for the variable-cross-section steel rail and the using method, the variable-cross-section steel rail can be clamped and welded.

Description

Technical Field

[0001] The invention relates to the technical field of railway turnout welding, and more specifically to a flash welding mechanism for a variable-section rail and a use method thereof. Background Art

[0002] The existing mobile flash welding mechanism is only suitable for welding conventional rails or grooved rails. Its typical structure is described in Chinese patent documents with application numbers 98105796.9, 98106266.0, 200910182212.5, 201020650427.3, 201110431236.7, 201310199232.X, and 201310314592.X. The fuselage structure includes: two pairs of clamps A rail clamping mechanism with consistent openings, a clamping device and an upsetting cylinder are arranged at one end of the machine body, the upsetting cylinder is located in the horizontal plane of the rail waist, and a clamping device and a convex cylinder are arranged at the other end; the clamping device comprises left and right clamp boxes which are hinged to each other through a fixed central hinge shaft in the middle, the lower parts of the left and right clamp boxes are respectively provided with relatively protruding left and right jaws, the upper ends of the left and right clamp boxes are respectively hinged to the two ends of the clamping cylinder, the central hinge shaft is provided with a lifting shaft sleeve, and a positioning block is fixed at the lower part of the lifting shaft sleeve.

[0003] The problem with the above welding machine structure is that the width of the clamp box is too wide, and the top forging cylinder occupies the horizontal position of the rail waist. In the railway switch area, there are AT variable-section rails in the switch area. The characteristic of this rail is a variable section, with a standard rail at the front end and an asymmetric rail with a shorter height at the back. The clamp of the above welding machine cannot clamp the AT variable-section rail, so the AT variable-section rail cannot be welded. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a flash welding mechanism and a method for using a variable-section rail, so as to be able to clamp and weld the variable-section rail.

[0005] Based on the above purpose, the present invention provides a flash welding mechanism for a variable-section rail, comprising a stationary frame clamp, a movable frame clamp, two relatively arranged upsetting cylinders, a first clamping cylinder, a second clamping cylinder, and a central axis, wherein: the upsetting cylinder comprises an upsetting cylinder body and an upsetting piston rod, the upsetting cylinder body and the upsetting piston rod are respectively and correspondingly mounted on the stationary frame clamp and the movable frame clamp, and the extension and retraction of the upsetting piston rod drives the movable frame clamp to reciprocate; the first clamping cylinder comprises a first clamping cylinder body and a first clamping piston rod, the first clamping cylinder body is mounted on the central axis, and the upper end of the stationary frame clamp is symmetrically mounted on the first clamping piston rod. On the plug rod, the first clamping piston rod is telescopically arranged in a direction perpendicular to the central axis; the second clamping cylinder includes a second clamping cylinder body and a second clamping piston rod, the second clamping cylinder body is installed on the central axis, the upper end of the movable frame clamp is symmetrically installed on the second clamping piston rod, and the second clamping piston rod is telescopically arranged in a direction perpendicular to the central axis; the central axis passes through the static frame clamp and the movable frame clamp respectively, so that the static frame clamp and the movable frame clamp can be rotatably installed on the central axis; the lower end of the static frame clamp includes two first clamping members, and the lower end of the movable frame clamp includes two second Two clamping members, the two first clamping members are used to clamp or loosen the variable-section rail, and the two second clamping members are used to clamp or loosen the normal rail; a rail top block is installed on one end of the central axis above the rail head of the variable-section rail, the first clamping member includes an outer electrode and an abutment member, the abutment member includes a positioning block, a bolt and a spring, the outer electrode includes a first side surface and a second side surface connected to each other, the first side surface is used to abut on the side surface of the rail head of the variable-section rail, the first side surface is provided with a first through hole, the second side surface is provided with a second through hole connected to the first through hole, the first through hole and the second through hole are connected The hole forms an accommodating cavity inside the outer electrode, the abutment is located in the accommodating cavity, and can be slidably arranged in the accommodating cavity along a direction perpendicular to the lower jaw surface of the rail head of the variable-section rail. The positioning block includes an abutting end and a mounting end arranged oppositely, the abutting end is used to abut the lower jaw of the rail head of the variable-section rail, the spring is compressed and installed on the mounting end and the outer electrode, the bolt is threadedly installed on the mounting end, and when the abutting end abuts the lower jaw of the rail head of the variable-section rail, the spring lifts the variable-section rail so that the rail head tread of the variable-section rail abuts against the rail top block.

[0006] Optionally, a top screw is also included, which is installed on the installation end and abuts against the outer side surface of the bolt.

[0007] Optionally, the spring is a butterfly spring.

[0008] Optionally, the transverse width between the lower ends of the two first clamping members is less than or equal to the transverse width between the lower ends of the two second clamping members.

[0009] Optionally, the second clamping member includes a pressure-maintaining tumor pushing cylinder and a tumor pushing tool holder, the tumor pushing cylinder includes a tumor pushing cylinder body and a tumor pushing rod drivingly connected to the tumor pushing cylinder body, the second clamping member has a jaw end, the tumor pushing cylinder body is installed on the jaw end, and the tumor pushing tool holder is installed on the tumor pushing rod.

[0010] Optionally, it also includes a first guide shaft and a second guide shaft, the first guide shaft is installed on the stationary frame clamp and the movable frame clamp, and is located above the first clamping member and the second clamping member arranged on the same side, and the second guide shaft is installed on the stationary frame clamp and the movable frame clamp, and is located above the first clamping member and the second clamping member arranged on the same side.

[0011] Optionally, the static frame clamp includes a first horizontal rod, a first clamping rod, a second clamping rod and two static frame arms, the first clamping piston rod is installed at the center of the first horizontal rod, the first horizontal rod includes a first end and a second end arranged opposite to each other, the first end is rotatably installed at one end of the first clamping rod, the other end of the first clamping rod is rotatably installed at the upper end of one of the static frame arms, the second end is rotatably installed at one end of the second clamping rod, and the other end of the second clamping rod is rotatably installed at the upper end of the other static frame arm; the dynamic frame clamp includes a second horizontal rod, a third clamping rod, a fourth clamping rod and two dynamic frame arms, the second clamping piston rod is installed at the center of the second horizontal rod, the second horizontal rod includes a third end and a fourth end arranged opposite to each other, the third end is rotatably installed at one end of the third clamping rod, the other end of the third clamping rod is rotatably installed at the upper end of one of the dynamic frame arms, the fourth end is rotatably installed at one end of the fourth clamping rod, and the other end of the fourth clamping rod is rotatably installed at the upper end of the other dynamic frame arm.

[0012] Based on the same inventive concept, the present invention also provides a method for using a flash welding mechanism for a variable-section rail. Using the flash welding mechanism for a variable-section rail as described in any of the above-mentioned items comprises the following steps: Step 1: The lower end of the static frame clamp comprises two first clamping members, the first clamping members comprise an outer electrode and an abutting member, the outer electrode comprises a first side surface and a second side surface connected to each other, and the first side surface is abutted against the side surface of the rail head of the variable-section rail; Step 2: The abutting member comprises a positioning block, a bolt and a spring, the abutting member is located in an accommodating cavity, and is slidably arranged in the accommodating cavity along a direction perpendicular to the lower jaw surface of the rail head of the variable-section rail, and the positioning block comprises an abutting end and an installation end arranged opposite to each other , the abutting end is abutted against the lower jaw of the rail head of the variable-section rail, the spring is compressed and installed on the mounting end and the outer electrode, the bolt thread is installed on the mounting end, and the end of the central axis located above the rail head of the variable-section rail is installed with a rail top block. When the abutting end is abutted against the lower jaw of the rail head of the variable-section rail, the rail top block abuts against the rail head tread of the variable-section rail; step three, the lower end of the dynamic frame clamp includes two second clamping members, the two second clamping members clamp the normal rail, and the two first clamping members clamp the variable-section rail; step four, the forging cylinder drives the forging piston rod, thereby driving the dynamic frame clamp to move in the direction of the static frame clamp to achieve flash welding of the normal rail and the variable-section rail.

[0013] The flash welding mechanism and the use method of the variable-section rail provided by the present invention include a stationary frame clamp, a movable frame clamp, two forging cylinders arranged opposite to each other, a first clamping cylinder, a second clamping cylinder, and a central axis. The lower end of the stationary frame clamp includes two first clamping members, and the lower end of the movable frame clamp includes two second clamping members. A rail top block is installed at one end of the central axis located above the rail head of the variable-section rail. The first clamping member includes an outer electrode and an abutting member. The abutting member includes a positioning block, a bolt, and a spring. First, a first side is abutted against the variable-section rail. On the side of the rail head of the rail; then, the abutting end is abutted against the lower jaw of the rail head of the variable-section rail, the spring is compressed and installed on the mounting end and the outer electrode, and the bolt thread is installed on the mounting end. When the abutting end is abutted against the lower jaw of the rail head of the variable-section rail, the rail top block abuts against the rail head tread of the variable-section rail; finally, the two first clamping members clamp the variable-section rail, and the two second clamping members clamp the normal rail. The forging cylinder drives the forging piston rod, thereby driving the dynamic frame clamp to move in the direction of the static frame clamp to achieve flash welding of the normal rail and the variable-section rail. The flash welding mechanism and use method of the variable-section rail provided by the present invention can clamp and weld the variable-section rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 objects and advantages of the present invention, wherein:

[0015] Figure 1It is a structural schematic diagram of a flash welding mechanism for a variable cross-section rail according to an embodiment of the present invention;

[0016] Figure 2 It is a front view of a flash welding mechanism for a variable cross-section rail according to an embodiment of the present invention;

[0017] Figure 3 A partial view of a flash welding mechanism for a variable-section rail according to an embodiment of the present invention;

[0018] Figure 4 Another partial view of the flash welding mechanism of the variable cross-section rail according to one embodiment of the present invention;

[0019] Figure 5 A side view of a flash welding mechanism for a variable cross-section rail according to an embodiment of the present invention;

[0020] Figure 6 It is a schematic structural diagram of a flash welding mechanism for a variable-section rail according to an embodiment of the present invention, in which an outer electrode abuts against a rail head of the variable-section rail;

[0021] Figure 7 It is a schematic structural diagram of the outer electrode in the flash welding mechanism of the variable cross-section rail according to one embodiment of the present invention;

[0022] Figure 8 A cross-sectional view of a flash welding mechanism for a variable-section rail according to an embodiment of the present invention showing an abutment member installed in an outer electrode;

[0023] Fig. 9 The present invention is a flowchart of a method for using a flash welding mechanism for a variable-section rail according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1: static frame clamp; 2: dynamic frame clamp; 3: pusher cylinder; 4: second clamping cylinder; 5: center axis; 6: rail head tread; 7: upsetting piston rod; 8: first clamping piston rod; 9: second clamping piston rod; 10: rail head side; 11: second clamping piece; 12: normal rail; 13: variable section rail; 14: rail top block; 15: outer electrode; 16: abutment; 17: positioning block; 18: bolt; 19: Spring; 20: first side; 21: second side; 22: abutment end; 23: mounting end; 24: lower jaw of rail head; 25: top screw; 26: first clamping member; 27: first horizontal rod; 28: first clamping rod; 29: second clamping rod; 30: stationary frame arm; 31: second horizontal rod; 32: third clamping rod; 33: fourth clamping rod; 34: moving frame arm; 35: first clamping cylinder; 36: top forging cylinder. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the embodiments. The same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0027] like Figures 1 to 8As shown, the flash welding mechanism of the variable-section rail provided by the present invention comprises a stationary frame clamp 1, a dynamic frame clamp 2, two relatively arranged upsetting cylinders 36, a first clamping cylinder 35, a second clamping cylinder 4, and a central shaft 5, wherein: the upsetting cylinder 36 comprises an upsetting cylinder 36 body and an upsetting piston rod 7, the upsetting cylinder 36 body and the upsetting piston rod 7 are respectively and correspondingly mounted on the stationary frame clamp 1 and the dynamic frame clamp 2, and the extension and retraction of the upsetting piston rod 7 drives the dynamic frame clamp 2 to reciprocate; the first clamping cylinder 35 comprises a first clamping cylinder 35 body and a first clamping piston rod 8, the first clamping cylinder 35 body is mounted on the central shaft 5, and the upper end of the stationary frame clamp 1 is symmetrically mounted on the first clamping piston rod 8, the first clamping piston rod 8 is telescopically arranged in a direction perpendicular to the central axis 5; the second clamping cylinder 4 includes a second clamping cylinder 4 body and a second clamping piston rod 9, the second clamping cylinder 4 body is installed on the central axis 5, the upper end of the movable frame clamp 2 is symmetrically installed on the second clamping piston rod 9, and the second clamping piston rod 9 is telescopically arranged in a direction perpendicular to the central axis 5; the central axis 5 passes through the static frame clamp 1 and the movable frame clamp 2 respectively, so that the static frame clamp 1 and the movable frame clamp 2 can be rotatably installed on the central axis 5; the lower end of the static frame clamp 1 includes two first clamping members 26, and the lower end of the movable frame clamp 2 includes two second clamping members 11, and the two first clamping members 26 are used The first clamping member 26 is used to clamp or release the variable-section rail 13, and the two second clamping members 11 are used to clamp or release the normal rail 12; a rail top block 14 is installed on one end of the central axis 5 located above the rail head of the variable-section rail 13, the first clamping member 26 includes an outer electrode 15 and an abutment member 16, the abutment member 16 includes a positioning block 17, a bolt 18 and a spring 19, the outer electrode 15 includes a first side surface 20 and a second side surface 21 connected to each other, the first side surface 20 is used to abut on the rail head side surface 10 of the variable-section rail 13, the first side surface 20 is provided with a first through hole, the second side surface 21 is provided with a second through hole connected to the first through hole, and the first through hole and the second through hole are provided on the outer An accommodating cavity is formed inside the side electrode 15, and the abutment member 16 is located in the accommodating cavity and can be slidably arranged in the accommodating cavity along a direction perpendicular to the lower jaw surface of the rail head of the variable-section rail 13. The positioning block 17 includes an abutting end 22 and a mounting end 23 that are relatively arranged. The abutting end 22 is used to abut against the lower jaw 24 of the rail head of the variable-section rail 13. The spring 19 is compressed and installed on the mounting end 23 and the outer electrode 15. The bolt 18 is threadedly installed on the mounting end 23. When the abutting end 22 abuts against the lower jaw 24 of the rail head of the variable-section rail 13, the spring 19 lifts the variable-section rail 13 so that the rail head tread 6 of the variable-section rail 13 abuts against the rail top block 14.

[0028] It should be noted that: the upsetting cylinder 36 includes an upsetting cylinder 36 body and an upsetting piston rod 7 drivingly connected to the upsetting cylinder 36 body, the first clamping cylinder 35 includes a first clamping cylinder 35 body and a first clamping piston rod 8 drivingly connected to the first clamping cylinder 35 body, and the second clamping cylinder 4 includes a second clamping cylinder 4 body and a second clamping piston rod 9 drivingly connected to the second clamping cylinder 4 body.

[0029] The flash welding mechanism of the variable-section rail provided by the present invention comprises a stationary frame clamp 1, a dynamic frame clamp 2, two upsetting cylinders 36 arranged opposite to each other, a first clamping cylinder 35, a second clamping cylinder 4, and a central shaft 5. The lower end of the stationary frame clamp 1 comprises two first clamping members 26, and the lower end of the dynamic frame clamp 2 comprises two second clamping members 11. A rail top block 14 is installed at one end of the central shaft 5 located above the rail head of the variable-section rail 13. The first clamping member 26 comprises an outer electrode 15 and an abutting member 16. The abutting member 16 comprises a positioning block 17, a bolt 18 and a spring 19. First, the first side surface 20 is abutted against the rail head side surface 10 of the variable-section rail 13; then , the abutting end 22 is abutted against the lower jaw 24 of the rail head of the variable-section rail 13, the spring 19 is compressed and installed on the mounting end 23 and the outer electrode 15, and the bolt 18 is threadedly installed on the mounting end 23. When the abutting end 22 is abutted against the lower jaw 24 of the rail head of the variable-section rail 13, the rail top block 14 is abutted against the rail head tread 6 of the variable-section rail 13; finally, the two first clamping members 26 clamp the variable-section rail 13, and the two second clamping members 11 clamp the normal rail 12. The upsetting cylinder 36 drives the upsetting piston rod 7, thereby driving the dynamic frame clamp 2 to move toward the direction of the static frame clamp 1, and realizing the flash welding of the normal rail 12 and the variable-section rail 13. The flash welding mechanism of the variable-section rail provided by the present invention can clamp and weld the variable-section rail 13.

[0030] like Figure 8 As shown, it also includes a top screw 25, which is installed at the installation end 23 and abuts against the outer side of the bolt 18. In this embodiment, the top screw 25 can prevent the bolt 18 from circumferential movement, thereby improving the structural stability of the flash welding mechanism of the variable-section rail.

[0031] In one embodiment of the present invention, the spring 19 is a butterfly spring. The butterfly spring has good wear resistance and a longer service life, thereby increasing the service life of the flash welding mechanism of the variable-section rail.

[0032] like Figure 4 As shown, the lateral width between the lower ends of the two first clamping members 26 is less than or equal to the lateral width between the lower ends of the two second clamping members 11. In this embodiment, the two narrow first clamping members 26 can better clamp the variable-section rail 13, thereby improving the convenience of the flash welding mechanism of the variable-section rail.

[0033] like Figure 2As shown, the second clamping member 11 includes a pressure-maintaining and pushing-out tube cylinder 3 and a pushing-out tube tool holder, the pushing-out tube cylinder 3 includes a pushing-out tube cylinder body and a pushing-out tube rod connected to the pushing-out tube cylinder 3 body, the second clamping member 11 has a jaw end, the pushing-out tube cylinder body is mounted on the jaw end, and the pushing-out tube tool holder is mounted on the pushing-out tube rod. In this embodiment, after the welding upset is completed, the steel rail is in a clamping and pressure-maintaining state, and the force of the pushing-out tube cylinder 3 can quickly complete the removal of the weld nodule, so that the joint surface is relatively smooth, which is conducive to ensuring the appearance quality of the welded joint.

[0034] In one embodiment of the present invention, it also includes a first guide shaft and a second guide shaft. The first guide shaft is installed on the stationary frame clamp 1 and the movable frame clamp 2, and is located above the first clamping member 26 and the second clamping member 11 arranged on the same side. The second guide shaft is installed on the stationary frame clamp 1 and the movable frame clamp 2, and is located above the first clamping member 26 and the second clamping member 11 arranged on the same side. The first guide shaft and the second guide shaft improve the structural rigidity between the stationary frame and the movable frame, thereby avoiding the adverse effect of the upsetting torque on the straightness of the welded joint, and improving the welding quality of the flash welding mechanism of the variable-section rail.

[0035] like Figure 2 and Figure 3 As shown, the stationary frame clamp 1 includes a first horizontal rod 27, a first clamping rod 28, a second clamping rod 29 and two stationary frame arms 30, the first clamping piston rod 8 is installed at the center of the first horizontal rod 27, the first horizontal rod 27 includes a first end and a second end that are arranged opposite to each other, the first end is rotatably installed at one end of the first clamping rod 28, the other end of the first clamping rod 28 is rotatably installed at the upper end of one stationary frame arm 30, the second end is rotatably installed at one end of the second clamping rod 29, the other end of the second clamping rod 29 is rotatably installed at the upper end of the other stationary frame arm 30 End; the movable frame clamp 2 includes a second horizontal rod 31, a third clamping rod 32, a fourth clamping rod 33 and two movable frame arms 34, the second clamping piston rod 9 is installed at the center of the second horizontal rod 31, the second horizontal rod 31 includes a third end and a fourth end arranged opposite to each other, the third end is rotatably mounted on one end of the third clamping rod 32, the other end of the third clamping rod 32 is rotatably mounted on the upper end of one movable frame arm 34, the fourth end is rotatably mounted on one end of the fourth clamping rod 33, and the other end of the fourth clamping rod 33 is rotatably mounted on the upper end of the other movable frame arm 34. In this embodiment, the above-mentioned rotating connections can all be hinged, through the rotating connection between the first horizontal rod 27, the first clamping rod 28, the second clamping rod 29 and the static frame arm 30, and through the rotating connection between the second horizontal rod 31, the third clamping rod 32, the fourth clamping rod 33 and the dynamic frame arm 34, the clamping force of the lower end of the static frame clamp 1 on the variable-section rail 13 and the lower end of the dynamic frame clamp 2 on the normal rail 12 are increased, thereby improving the clamping force of the flash welding mechanism of the variable-section rail.

[0036] like Figures 1 to 9 As shown, based on the same inventive concept, an embodiment of the present invention further provides a method for using a flash welding mechanism for a variable-section rail. The flash welding mechanism for a variable-section rail using any of the aforementioned embodiments comprises the following steps: Step 1, the lower end of the static frame clamp 1 comprises two first clamping members 26, the first clamping member 26 comprises an outer electrode 15 and an abutting member 16, the outer electrode 15 comprises a first side surface 20 and a second side surface 21 connected to each other, and the first side surface 20 is abutted against the rail head side surface 10 of the variable-section rail 13; Step 2, the abutting member 16 comprises a positioning block 17, a bolt 18 and a spring 19, the abutting member 16 is located in the accommodating cavity, and can be slidably arranged in the accommodating cavity along a direction perpendicular to the lower jaw surface of the rail head of the variable-section rail 13, the positioning block 17 comprises an abutting end 22 and a mounting end 23 arranged opposite to each other, The abutting end 22 abuts against the lower jaw 24 of the rail head of the variable-section rail 13, the spring 19 is compressed and installed on the mounting end 23 and the outer electrode 15, the bolt 18 is threadedly installed on the mounting end 23, and the end of the central axis 5 located above the rail head of the variable-section rail 13 is installed with a rail top block 14. When the abutting end 22 abuts against the lower jaw 24 of the rail head of the variable-section rail 13, the rail top block 14 abuts against the rail head tread 6 of the variable-section rail 13; Step three, the lower end of the movable frame clamp 2 includes two second clamping members 11, the two second clamping members 11 clamp the normal rail 12, and the two first clamping members 26 clamp the variable-section rail 13; Step four, the forging cylinder 36 drives the forging piston rod 7, thereby driving the movable frame clamp 2 to move toward the direction of the static frame clamp 1, so as to realize the flash welding of the normal rail 12 and the variable-section rail 13.

[0037] The flash welding mechanism and use method of the variable-section rail provided by the present invention include a stationary frame clamp 1, a movable frame clamp 2, two top forging cylinders 36 arranged opposite to each other, a first clamping cylinder 35, a second clamping cylinder 4, and a center shaft 5. The lower end of the stationary frame clamp 1 includes two first clamping members 26, and the lower end of the movable frame clamp 2 includes two second clamping members 11. A rail top block 14 is installed at one end of the center shaft 5 located above the rail head of the variable-section rail 13. The first clamping member 26 includes an outer electrode 15 and an abutting member 16. The abutting member 16 includes a positioning block 17, a bolt 18 and a spring 19. First, the first side surface 20 is abutted against the rail head of the variable-section rail 13. On the side 10; then, the abutting end 22 is abutted against the lower jaw 24 of the rail head of the variable-section rail 13, the spring 19 is compressed and installed on the mounting end 23 and the outer electrode 15, and the bolt 18 is threadedly installed on the mounting end 23. When the abutting end 22 is abutted against the lower jaw 24 of the rail head of the variable-section rail 13, the rail top block 14 abuts against the rail head tread 6 of the variable-section rail 13; finally, the two first clamping members 26 clamp the variable-section rail 13, and the two second clamping members 11 clamp the normal rail 12. The upsetting cylinder 36 drives the upsetting piston rod 7, thereby driving the dynamic frame clamp 2 to move toward the direction of the static frame clamp 1, and realizing the flash welding of the normal rail 12 and the variable-section rail 13. The flash welding mechanism and use method of the variable-section rail provided by the present invention can clamp and weld the variable-section rail 13.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flash welding mechanism for a variable cross-section rail, characterized in that: It includes a static frame clamp, a dynamic frame clamp, two top forging cylinders arranged opposite to each other, a first clamping cylinder, a second clamping cylinder, and a central axis, wherein: The upsetting cylinder comprises an upsetting cylinder body and an upsetting piston rod, wherein the upsetting cylinder body and the upsetting piston rod are respectively and correspondingly mounted on the static frame clamp and the dynamic frame clamp, and the extension and retraction of the upsetting piston rod drives the dynamic frame clamp to reciprocate; The first clamping cylinder comprises a first clamping cylinder body and a first clamping piston rod, the first clamping cylinder body is mounted on the central axis, the upper end of the stationary frame clamp is symmetrically mounted on the first clamping piston rod, and the first clamping piston rod is telescopically arranged in a direction perpendicular to the central axis; The second clamping cylinder comprises a second clamping cylinder body and a second clamping piston rod, the second clamping cylinder body is mounted on the central axis, the upper end of the movable frame clamp is symmetrically mounted on the second clamping piston rod, and the second clamping piston rod is telescopically arranged in a direction perpendicular to the central axis; The central shaft passes through the static frame clamp and the dynamic frame clamp respectively, so that the static frame clamp and the dynamic frame clamp can be rotatably mounted on the central shaft; The lower end of the static frame clamp includes two first clamping members, and the lower end of the dynamic frame clamp includes two second clamping members, the two first clamping members are used to clamp or release the variable-section rails, and the two second clamping members are used to clamp or release the normal rails; A rail top block is installed at one end of the central axis located above the rail head of the variable-section rail, the first clamping member includes an outer electrode and an abutment member, the abutment member includes a positioning block, a bolt and a spring, the outer electrode includes a first side surface and a second side surface connected to each other, the first side surface is used to abut against the side surface of the rail head of the variable-section rail, the first side surface is provided with a first through hole, the second side surface is provided with a second through hole connected to the first through hole, the first through hole and the second through hole form a receiving cavity inside the outer electrode, and the abutment member is located at a position The spring is compressed and mounted on the mounting end and the outer electrode, and the bolt is threadedly mounted on the mounting end. When the abutting end abuts against the lower jaw of the rail head of the variable-section rail, the spring lifts the variable-section rail so that the tread of the rail head of the variable-section rail abuts against the rail top block.

2. The flash welding mechanism for variable cross-section rail according to claim 1, characterized in that: It also includes a top screw, which is installed on the installation end and abuts against the outer side surface of the bolt.

3. The flash welding mechanism for a variable cross-section rail according to claim 1, characterized in that: The spring is a butterfly spring.

4. The flash welding mechanism for a variable cross-section rail according to claim 1, characterized in that: The transverse width between the lower ends of the two first clamping members is less than or equal to the transverse width between the lower ends of the two second clamping members.

5. The flash welding mechanism for a variable cross-section rail according to claim 1, characterized in that: The second clamping member includes a pressure-maintaining tumor-pushing cylinder and a tumor-pushing tool holder. The tumor-pushing cylinder includes a tumor-pushing cylinder body and a tumor-pushing rod drivingly connected to the tumor-pushing cylinder body. The second clamping member has a jaw end. The tumor-pushing cylinder body is installed on the jaw end. The tumor-pushing tool holder is installed on the tumor-pushing rod.

6. The flash welding mechanism for a variable cross-section rail according to claim 1, characterized in that: It also includes a first guide shaft and a second guide shaft, the first guide shaft is installed on the stationary frame clamp and the movable frame clamp, and is located above the first clamping member and the second clamping member arranged on the same side, and the second guide shaft is installed on the stationary frame clamp and the movable frame clamp, and is located above the first clamping member and the second clamping member arranged on the same side.

7. The flash welding mechanism for a variable cross-section rail according to claim 1, characterized in that: The static frame clamp includes a first horizontal rod, a first clamping rod, a second clamping rod and two static frame arms, the first clamping piston rod is installed at the center of the first horizontal rod, the first horizontal rod includes a first end and a second end arranged opposite to each other, the first end is rotatably installed at one end of the first clamping rod, the other end of the first clamping rod is rotatably installed at the upper end of one of the static frame arms, the second end is rotatably installed at one end of the second clamping rod, and the other end of the second clamping rod is rotatably installed at the upper end of the other static frame arm; the dynamic frame clamp includes a second horizontal rod, a third clamping rod, a fourth clamping rod and two dynamic frame arms, the second clamping piston rod is installed at the center of the second horizontal rod, the second horizontal rod includes a third end and a fourth end arranged opposite to each other, the third end is rotatably installed at one end of the third clamping rod, the other end of the third clamping rod is rotatably installed at the upper end of one of the dynamic frame arms, the fourth end is rotatably installed at one end of the fourth clamping rod, and the other end of the fourth clamping rod is rotatably installed at the upper end of the other dynamic frame arm.

8. A method for using a flash welding mechanism for a variable-section rail, characterized in that: The flash welding mechanism for the variable cross-section rail according to any one of claims 1 to 7 comprises the following steps: Step 1: The lower end of the static frame clamp includes two first clamping members, the first clamping members include an outer electrode and an abutting member, the outer electrode includes a first side surface and a second side surface connected to each other, and the first side surface is abutted against the side surface of the rail head of the variable-section rail; Step 2, the abutment member includes a positioning block, a bolt and a spring, the abutment member is located in the accommodating cavity, and is slidably arranged in the accommodating cavity along a direction perpendicular to the lower jaw surface of the rail head of the variable-section rail, the positioning block includes an abutment end and a mounting end arranged oppositely, the abutment end is abutted against the lower jaw of the rail head of the variable-section rail, the spring is compressed and mounted on the mounting end and the outer electrode, the bolt is threadedly mounted on the mounting end, and a rail top block is installed on the end of the central axis located above the rail head of the variable-section rail, when the abutment end abuts against the lower jaw of the rail head of the variable-section rail, the rail top block abuts against the tread of the rail head of the variable-section rail; Step 3: The lower end of the movable frame clamp includes two second clamping members, and the two second clamping members are used to clamp the normal rails, and the two first clamping members are used to clamp the variable-section rails; Step 4: The upsetting cylinder drives the upsetting piston rod, thereby driving the dynamic frame clamp to move toward the static frame clamp to achieve flash welding of the normal rail and the variable-section rail.

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