Narrow body flash welding and heat treatment normalizing all-in-one machine and method

Abstract

The invention belongs to the technical field of railway engineering mechanical equipment manufacturing, and provides a narrow body flash welding and heat treatment normalizing all-in-one machine and method.The all-in-one machine comprises a static end clamping mechanism, a movable end clamping mechanism, a pressure maintaining and overlap pushing mechanism, a normalizing assembly, a center shaft upsetting structure and a clamp balance oil cylinder; the static end clamping mechanism and the movable end clamping mechanism are distributed at the two ends of the all-in-one machine, the static end clamping mechanism and the movable end clamping mechanism are connected in a penetrating mode through a center shaft upsetting structure, and a pressure maintaining and overlap pushing mechanism and a clamp balance oil cylinder used for providing outward supporting force for a clamp are installed between the static end clamping mechanism and the movable end clamping mechanism. And a normalizing assembly combining rotary mold closing and turnover mold closing is mounted on the pressure-maintaining overlap pushing mechanism. According to the clamp balance oil cylinder, the stability of a welding machine and the straightness of a welded steel rail are improved. The bead pushing tool rest is guided by a central shaft, the rigidity of the bead pushing mechanism is increased, the normalizing assembly adopts a mode of combining rotary die assembly and turnover die assembly, and the requirement for operation in narrow space of a turnout can be met.

Description

Technical Field

[0001] The present application belongs to the technical field of railway engineering machinery and equipment manufacturing, and provides a narrow-body flash welding and heat treatment normalizing integrated machine and method. Background Art

[0002] Turnouts, also known as "crossovers", are an indispensable part of the railway system. They are responsible for connecting different tracks and realizing the functions of turning, diverting and merging trains, thereby ensuring efficient scheduling and flexible operation of railway transportation. However, due to its complex structure and narrow working space, turnouts are also regarded as one of the weak links in the seamless line, and together with curves and joints, they constitute the three major vulnerable points of the track. Therefore, improving the quality of turnout welding has become a key research direction to ensure the safety and reliability of railways.

[0003] At present, due to the complex structure of turnouts and limited working space, conventional flash welding machines are difficult to apply to such environments, resulting in the current turnout rail welding mainly relying on traditional aluminothermic welding technology. Aluminothermic welding generates high temperature through chemical reaction, injecting molten metal into the joint gap to form a weld. Although aluminothermic welding has the advantages of simple equipment and flexible operation, its welding quality is difficult to control, and it is easy to produce defects such as slag inclusions and pores. In addition, the deformation after welding is large, resulting in low productivity and increasing the cost and frequency of subsequent maintenance.

[0004] With the rapid development of high-speed rail, the safety and reliability of railways are becoming increasingly important, and the welding quality of rails is also constantly improving. At present, rail welding is mainly divided into three categories: flash butt welding, pneumatic welding, and thermite welding. Flash butt welding has been widely used because of its reliable quality, stable welding process, and high degree of equipment automation. Although flash welders for turnouts are gradually being used, most of the heat treatment equipment after turnout welding still uses flame normalizing or simple normalizing devices. The normalizing quality of both is greatly affected by human factors and the quality is unstable. Therefore, a device that can be applied to turnout joint welding and heat treatment normalizing is needed to realize the one-stop continuous operation of heat treatment normalizing after flash welding, which can improve the construction efficiency on site and reduce the waste of vehicle mobilization, manpower, and resources.

[0005] The existing turnout welding machine patent CN116511673B does not have the clamping balance cylinder in the present application, and does not have a heat treatment device, and cannot achieve the heat treatment function after rail welding.

[0006] The existing turnout welding machine patent CN213257640U has no knob pushing cylinder, no pressure-maintaining knob pushing function, a narrow clamping mechanism, insufficient clamping guidance when welding long rails, and no clamping balance cylinder in this application, which cannot meet the straightness requirements of long rails after welding.

[0007] The existing patent CN213379795U for the turnout welding machine has an upsetting auxiliary cylinder arranged on the upper part of the clamp in order to increase the upsetting force of the upsetting cylinder, but it cannot overcome the deformation caused by the unbalanced force of the clamp during the upsetting process. The force of the upsetting cylinder is opposite to that of the clamp balancing cylinder in this application. Summary of the invention

[0008] In view of the above-mentioned problems existing in the prior art, the present application provides a narrow-body flash welding and heat treatment normalizing integrated machine and method which can improve the stability of the welding machine and the straightness of the rail after welding.

[0009] In order to achieve the above technical effects, the technical contents of the present invention are as follows: A narrow-body flash welding and heat treatment normalizing integrated machine comprises a static end clamping mechanism, a dynamic end clamping mechanism, a pressure-maintaining and nodule-pushing mechanism, a normalizing assembly, a center shaft upsetting structure and a clamp balancing cylinder; the static end clamping mechanism and the dynamic end clamping mechanism are distributed at both ends of the integrated machine, the static end clamping mechanism and the dynamic end clamping mechanism are connected through the center shaft upsetting structure, a pressure-maintaining and nodule-pushing mechanism and a clamp balancing cylinder for providing outward supporting force to the clamp are installed between the static end clamping mechanism and the dynamic end clamping mechanism, and a normalizing assembly combining rotary mold clamping and flip mold clamping is installed on the pressure-maintaining and nodule-pushing mechanism.

[0010] Furthermore, the center shaft upsetting structure includes a center shaft and an upsetting cylinder, and the center shaft and the upsetting cylinder are connected by threads.

[0011] Furthermore, the static end clamping mechanism includes a clamping cylinder, a first static end clamp and a second static end clamp, the clamping cylinder is connected to the first static end clamp and the second static end clamp, and the opening and closing center of the static end clamping mechanism is the axis of the central axis.

[0012] Furthermore, the first clamp at the static end is provided with a first central axis single ear seat and a first central axis double ear seat, and the second clamp at the static end is provided with a second central axis double ear seat and a second central axis single ear seat, wherein the first central axis single ear seat and the second central axis double ear seat are a pair of central axis ear seats, the first central axis double ear seat and the second central axis single ear seat are a pair of central axis ear seats, the central axis passes through the two pairs of central axis ear seats, and the clamp is clamped and opened by rotating with the center line of the central axis as the axis, and the clamping length of the static end clamping mechanism is 567mm.

[0013] Furthermore, the movable end clamping mechanism includes a clamping cylinder, a first movable end clamp and a second movable end clamp, the clamping cylinder is connected to the first movable end clamp and the second movable end clamp, and the opening and closing center of the movable end clamping mechanism is the axis of the central shaft.

[0014] Furthermore, a third center axis double-ear seat is arranged on the first clamp at the movable end, and a third center axis single-ear seat is arranged on the second clamp at the movable end. The third center axis double-ear seat and the third center axis single-ear seat are a pair of center axis ear seats and are penetrated by the center axis, and the clamps are clamped and opened by rotating around the center line of the center axis. The clamping length of the clamping mechanism at the movable end is 300 mm.

[0015] Furthermore, there are two clamp balancing cylinders, which are respectively installed on both sides of the upper part of the integrated machine. The clamp balancing cylinder on each side is respectively connected to the clamp of the static end clamping mechanism and the clamp of the dynamic end clamping mechanism to provide clamp supporting force.

[0016] Furthermore, a conductive shaft is provided under each clamp balancing cylinder, and the conductive shaft runs through the clamps of the static end clamping mechanism and the dynamic end clamping mechanism. One end of the conductive shaft passes through the dynamic end clamping mechanism and is connected to the DC transformer outside the dynamic end clamping mechanism.

[0017] Furthermore, the pressure-maintaining tumor pushing mechanism includes a tumor pushing tool holder, a tumor pushing extension rod and a tumor pushing cylinder. The center axis of the center axis top forging structure passes through the tumor pushing tool holder, and the tumor pushing tool holder is guided by the center axis. Tool holder waist holes are provided on both sides of the tumor pushing tool holder. The tumor pushing extension rod passes through the tool holder waist holes and is connected by screws. The tumor pushing cylinder and the tumor pushing extension rod are connected by threads, and the tumor pushing cylinder and the tumor pushing extension rod are installed on the static end clamping mechanism.

[0018] Furthermore, the normalizing component is installed on the tumor pushing tool holder of the pressure-maintaining tumor pushing mechanism, and the normalizing component includes a normalizing transformer installed on the upper part of the tumor pushing tool holder, and the two poles of the normalizing transformer are respectively connected to the first normalizing coil and the second normalizing coil through the first normalizing bus and the second normalizing bus, the first normalizing coil is fixed on the first coil mold base; the second normalizing coil is fixed on the second coil mold base; and the bottom of the first normalizing coil is shorter than the bottom of the second normalizing coil; the first coil mold base is connected to the tumor pushing tool holder through the first coil mold base rotating pin, and the first clamping cylinder is connected to the first coil mold base through the pin, so as to realize the up and down flipping of the first coil mold base; the second coil mold base is installed on the tumor pushing tool holder through the upper and lower bearing seats, and the second clamping cylinder drives the horizontal rotation of the second coil mold base through the gear rack group on the upper part of the second coil mold base, so as to realize the clamping of the second normalizing coil.

[0019] Furthermore, a first air jet box is installed between the first coil mold base and the first normalizing coil, and a second air jet box is installed between the second coil mold base and the second normalizing coil, and the center of each air jet box coincides with the center of the corresponding coil, and the first air jet box and the second air jet box are both connected to a compressed air source.

[0020] A narrow body flash welding and heat treatment normalizing method comprises the following steps: Step 1: Before welding, remove rust and scale from the waist of the AT variable-section rail and the ordinary rail, hang the tumor-removing knife on the ordinary rail, and then perform initial alignment; Step 2: Place the narrow-body flash welding and heat treatment normalizing machine right above the AT variable-section rail and the ordinary rail, and make the rail top reference block contact the rail top. At the same time, the static end clamping mechanism and the dynamic end clamping mechanism are clamped, and the working edge of the butt-welded rail is adjusted to align, and precise positioning is completed; Step 3: The movable upsetting cylinder adjusts the distance between the static end clamping mechanism and the dynamic end clamping mechanism through the central axis to complete the distance adjustment between the AT variable-section rail and the ordinary rail; Step 4: Start the welding system, connect the welding power supply, power on the DC transformer, and start the flash burning process. After 90s~180s, the piston rod of the upsetting cylinder retracts and transmits the force to the moving end clamping mechanism through the central axis. The static end clamping mechanism and the moving end clamping mechanism are pulled closer within 0.5s~1s to complete the upsetting process. During the upsetting process, the lower part of the clamp of the static end clamping mechanism and the moving end clamping mechanism is subjected to an outward force F1, and the middle part of the clamp of the static end clamping mechanism and the moving end clamping mechanism is subjected to an inward pulling force F2 of the upsetting cylinder. The clamp balancing cylinder provides an outward force support F3 on the upper part of the clamp of the static end clamping mechanism and the moving end clamping mechanism, so that the force of the clamp of the static end clamping mechanism and the moving end clamping mechanism is balanced, ensuring the straightness of the rail after welding. Step 5: After the upsetting process is completed, the pusher cylinder moves, and the pusher cylinder applies force to the pusher tool holder through the pusher extension rod. The pusher tool holder pushes the pusher tool to complete the weld push. The pusher cylinder retracts the tool holder to complete the entire pressure-maintaining push process. Step 6: Open the static end clamping mechanism and the dynamic end clamping mechanism, lift the equipment away from the rail, and deal with the residual welding slag and weld nodules on the rail; Step 7: The narrow-body flash welding and heat treatment normalizing machine is hoisted and placed on the welded rail again. After the static end clamping mechanism and the dynamic end clamping mechanism are clamped again, the coils on the normalizing assembly are molded, and the first normalizing coil is turned down clockwise around the first coil die base pin along with the first coil die base, and the second normalizing coil is rotated 90° counterclockwise around the plumb line along with the second coil die base driven by the gear rack group. The upper and lower surfaces of the first normalizing coil and the second normalizing coil are in contact to form a closed loop. At this time, the coil is disconnected from the normalizing power supply, and the air jet is turned on. The first air jet box and the second air jet box spray compressed air to cool the completed welding seam to below 500°C; Step 8: After the weld temperature drops below 500℃, move the push cylinder, adjust the coil position, align the center of the coil with the weld center, and turn on the normalizing power supply. The normalizing transformer transmits the medium frequency current to the normalizing coil through the normalizing busbar, thus forming an induction loop. At this time, the coil begins to heat treat the weld; Step 9: After the rail head temperature rises to 900°C, the medium frequency current is automatically cut off and stopped, and the air spray is immediately turned on to cool the rail surface temperature to below 500°C through compressed air again to complete the heat treatment process.

[0021] The advantages of this application are: 1. This application adds a clamp balancing cylinder to improve the stability of the welding machine and the straightness of the rail after welding.

[0022] 2. The tumor pushing tool holder of the present application adopts central axis guidance, and the tumor pushing extension rod is only used to transmit the tumor pushing force but not to guide. The conventional tool holder guide shaft guidance is abandoned, the rigidity of the tumor pushing mechanism is increased, the overall deformation of the tool holder is reduced during the tumor pushing process, and the situation that the tumor pushing knife damages the base material after the tumor is pushed is prevented.

[0023] 3. This application adds a normalizing component on the basis of a narrow clamping seat welding machine, which can realize the integration of welding and normalizing and improve construction efficiency. The normalizing component of this application adopts an innovative clamping method that combines rotary clamping and flip clamping at the same time, which can meet the narrow space of the turnout for operation, wherein the rotary clamping refers to the horizontal rotation of the second normalizing coil, and the flip clamping refers to the upside-down flipping of the first normalizing coil.

[0024] 4. The present application designs the moving end clamp into a pair of center axis ear seat structures to reduce the clamping width of the clamp to meet the clamping length of 450mm of the AT variable section rail of the turnout.

[0025] 5. This application adds a heat treatment device to achieve the heat treatment function after rail welding. This application includes a knob-pushing cylinder, which has a pressure-maintaining knob-pushing function and can also meet the welding requirements of long rails and most turnouts.

[0026] 6. This application adopts the DC welding principle, and the flash butt welding clamping mechanism is made of high-strength carbon steel, which ensures the strength requirements of the equipment while reducing the size of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of this application.

[0028] Figure 2 Schematic diagram of the static end clamping mechanism.

[0029] Figure 3 Schematic diagram of the clamp of the static end clamping mechanism.

[0030] Figure 4 Schematic diagram of the moving end clamping mechanism.

[0031] Figure 5 Schematic diagram of the clamping mechanism of the moving end.

[0032] Figure 6Schematic diagram of the pressure-maintaining and tumor-pushing mechanism.

[0033] Figure 7 It is a schematic diagram of the clamping state of the static end clamping mechanism or the dynamic end clamping mechanism.

[0034] Figure 8 It is a schematic diagram of the released state of the static end clamping mechanism or the dynamic end clamping mechanism.

[0035] Figure 9-10 Schematic diagram of the normalizing assembly.

[0036] Fig.11 It is a closed schematic diagram of the first normalizing coil and the second normalizing coil.

[0037] Fig.12 for Fig.11 Top view of the .

[0038] Fig.13 Open the schematic diagram for the first normalizing coil and the second normalizing coil.

[0039] Fig.14 for Fig.13 Top view of the .

[0040] Fig.15 This is the force diagram of the clamp during the upsetting process.

[0041] In the attached figure: 1-static end clamping mechanism, 2-dynamic end clamping mechanism, 3-center shaft upsetting structure, 4-pressure-maintaining and pushing mechanism, 5-clamping balance cylinder, 6-normalizing assembly, 7-conductive shaft, 8-DC transformer, 10-AT variable-section rail, 101-clamping cylinder, 102-static end first clamp, 103-static end second clamp, 1021-first center shaft single-ear seat, 1022-first center shaft double-ear seat, 1031-second center shaft double-ear seat, 1032-second center shaft single-ear seat, 201-dynamic end first clamp, 202-dynamic end second clamp, 203-clamping cylinder, 2011-third center shaft double-ear seat, 20 21-the third center axis single ear seat, 301-center axis, 302-upsetting cylinder, 401-knob pushing tool holder, 402-knob pushing extension rod, 403-knob pushing cylinder, 4011-knob holder waist hole, 601-normalizing transformer, 602-the first normalizing bus, 603-the second normalizing bus, 605-the first coil mold base, 606-the first normalizing coil, 607-the second coil mold base, 608-the second normalizing coil, 609-the first mold closing cylinder, 610-the second mold closing cylinder, 611-the first coil mold base rotating pin, 612-gear rack set, 613-the first air spray box, 614-the second air spray box. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of the present application, it should be noted that the terms "upper", "vertical", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] Example 1 like Figure 1As shown, a narrow-body flash welding and heat treatment normalizing integrated machine includes a static end clamping mechanism 1, a dynamic end clamping mechanism 2, a pressure-maintaining and nodule-pushing mechanism 4, a normalizing component 6, a center shaft upsetting structure 3 and a clamp balancing cylinder 5; the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are distributed at both ends of the integrated machine, the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are connected through the center shaft upsetting structure 3, a pressure-maintaining and nodule-pushing mechanism 4 and a clamp balancing cylinder 5 for providing outward supporting force to the clamp are installed between the static end clamping mechanism 1 and the dynamic end clamping mechanism 2, and a normalizing component 6 combining rotary mold clamping and flip mold clamping is installed on the pressure-maintaining and nodule-pushing mechanism 4.

[0048] The present application adds a clamp balancing cylinder 5 to improve the stability of the welding machine and the straightness of the rail after welding. The present application's tumor-pushing tool holder 401 is guided by the central axis 301, and the tumor-pushing extension rod 402 is only used to transmit the tumor-pushing force without guidance, abandoning the conventional tool holder guide shaft guidance, increasing the rigidity of the tumor-pushing mechanism, reducing the overall deformation of the tool holder during the tumor-pushing process, and preventing the tumor-pushing knife from damaging the parent material after the tumor is pushed. The present application adds a normalizing component 6 on the basis of the narrow clamping seat welding machine, which can realize the integration of welding and normalizing and improve construction efficiency.

[0049] Example 2 like Figure 1 As shown, a narrow-body flash welding and heat treatment normalizing integrated machine includes a static end clamping mechanism 1, a dynamic end clamping mechanism 2, a pressure-maintaining and nodule-pushing mechanism 4, a normalizing component 6, a center shaft upsetting structure 3 and a clamp balancing cylinder 5; the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are distributed at both ends of the integrated machine, the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are connected through the center shaft upsetting structure 3, a pressure-maintaining and nodule-pushing mechanism 4 and a clamp balancing cylinder 5 for providing outward supporting force to the clamp are installed between the static end clamping mechanism 1 and the dynamic end clamping mechanism 2, and a normalizing component 6 combining rotary mold clamping and flip mold clamping is installed on the pressure-maintaining and nodule-pushing mechanism 4.

[0050] like Figure 2 As shown, the central shaft upsetting structure 3 includes a central shaft 301 and an upsetting cylinder 302 , and the central shaft 301 and the upsetting cylinder 302 are connected by threads.

[0051] The static end clamping mechanism 1 includes a clamping cylinder 101, a first static end clamp 102 and a second static end clamp 103. The clamping cylinder 101 is connected to the first static end clamp 102 and the second static end clamp 103. The opening and closing center of the static end clamping mechanism 1 is the axis of the central axis 301. The opening and closing of the first static end clamp 102 and the second static end clamp 103 are realized by the clamping cylinder 101.

[0052] like Figure 3As shown, the first clamp 102 at the static end is provided with a first center axis single ear seat 1021 and a first center axis double ear seat 1022, and the second clamp 103 at the static end is provided with a second center axis double ear seat 1031 and a second center axis single ear seat 1032, wherein the first center axis single ear seat 1021 and the second center axis double ear seat 1031 are a pair of center axis 301 ear seats, the first center axis double ear seat 1022 and the second center axis single ear seat 1032 are a pair of center axis 301 ear seats, the center axis 301 passes through the two pairs of center axis 301 ear seats, and the clamp is clamped and opened by rotating with the center line of the center axis 301 as the axis, and the clamping length of the static end clamping mechanism 1 is 567mm. The clamping length here refers to the length of the static end clamping mechanism 1 in contact with the ordinary rail 11 when it is in the clamping state, such as Figure 6 Length indicated at lower right.

[0053] like Figure 4 As shown, the movable end clamping mechanism 2 comprises a clamping oil cylinder 101, a movable end first clamp 201 and a movable end second clamp 202, the clamping oil cylinder 101 is connected to the movable end first clamp 201 and the movable end second clamp 202, the opening and closing center of the movable end clamping mechanism 2 is the axis of the central axis 301, and the opening and closing of the movable end first clamp 201 and the movable end second clamp 202 is realized by the clamping oil cylinder 101. The static end clamping mechanism 1 and the movable end clamping mechanism 2 are opened and closed synchronously.

[0054] like Figure 5 As shown, a third center axis double-ear seat 2011 is provided on the first clamp 201 at the moving end, and a third center axis single-ear seat 2021 is provided on the second clamp 202 at the moving end. The third center axis double-ear seat 2011 and the third center axis single-ear seat 2021 are a pair of center axis 301 ear seats and are penetrated by the center axis 301, and rotate with the center line of the center axis 301 as the axis to realize the clamping and opening of the clamp. The clamping length of the moving end clamping mechanism 2 is 300mm. When welding turnouts, the AT variable-section rail 10 has only a clamping length of 450mm, which can be clamped by the moving end clamping mechanism 2. The clamping length here refers to the length of the moving end clamping mechanism 2 in contact with the ordinary rail 11 when it is in the clamped state. Figure 6 Length indicated at lower left.

[0055] There are two clamp balancing oil cylinders 5, which are respectively installed on both sides of the upper part of the integrated machine. The clamp balancing oil cylinders 5 on each side respectively provide clamp support force between the clamps of the static end clamping mechanism 1 and the clamps of the dynamic end clamping mechanism 2. During the upsetting process, the clamp balancing oil cylinders 5 provide support force to the clamps of the static end clamping mechanism 1 and the clamps of the dynamic end clamping mechanism 2, so that the forces on the clamps of the static end clamping mechanism 1 and the clamps of the dynamic end clamping mechanism 2 remain balanced.

[0056] A conductive shaft 7 is provided below each clamp balancing cylinder 5, and the conductive shaft 7 runs through the inside of the clamps of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 to achieve synchronous opening and closing of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2. One end of the conductive shaft 7 passes through the dynamic end clamping mechanism 2 and is connected to a DC transformer 8 outside the dynamic end clamping mechanism 2.

[0057] like Figure 6-Figure 8 As shown, the pressure-maintaining and tummy-pushing mechanism 4 includes a tummy-pushing tool holder 401, a tummy-pushing extension rod 402, and a tummy-pushing oil cylinder 403. The central axis 301 of the central axis upsetting structure 3 passes through the tummy-pushing tool holder 401, and the tummy-pushing tool holder 401 is guided by the central axis 301. Both sides of the tummy-pushing tool holder 401 are provided with tool holder waist-shaped holes 4011. The tummy-pushing extension rod 402 passes through the tool holder waist-shaped holes 4011 and is connected by screws. The tummy-pushing extension rod 402 can slide up and down in the tool holder waist-shaped holes 4011. The tummy-pushing oil cylinder 403 is connected to the tummy-pushing extension rod 402 by threads, and the tummy-pushing oil cylinder 403 and the tummy-pushing extension rod 402 are installed on the static end clamping mechanism 1. A tummy-pushing oil cylinder 403 is installed on each of the static end first clamp 102 and the static end second clamp 103 of the static end first clamp 102, and each tummy-pushing oil cylinder 403 is connected to a tummy-pushing extension rod 402.

[0058] The anode pushing tool holder 401 of the pressure-maintaining anode pushing mechanism 4 of the present application adopts the central axis 301 as a guide, abandoning the conventional guide structure of the anode pushing cylinder 403 and the extension rod 402. At the same time, the installation position of the anode pushing cylinder 403 is higher than the top surface of the ordinary rail 11. The purpose is to reduce the space at the bottom of the equipment, so that the equipment can operate in the narrow space of the turnout.

[0059] like Figure 9-10As shown, the normalizing component 6 is installed on the pusher tool holder 401 of the pressure-maintaining pusher mechanism 4. The normalizing component 6 moves with the pusher tool holder 401. During normalizing, the normalizing coil position is adjusted to align with the weld by the pusher cylinder 403. The normalizing component 6 includes a normalizing transformer 601 installed on the upper part of the tumor pushing tool holder 401. The two poles of the normalizing transformer 601 are respectively connected to the first normalizing coil 606 and the second normalizing coil 608 through the first normalizing bus 602 and the second normalizing bus 603. The first normalizing coil 606 is fixed on the first coil mold base 605, and the two are completely insulated; the second normalizing coil 608 is fixed on the second coil mold base 607, and the two are completely insulated; and the bottom of the first normalizing coil 606 is shorter than the bottom of the second normalizing coil 608; the first coil mold base 605 is connected to the tumor pushing tool holder 401 through the first coil mold base rotating pin 611, and the first clamping cylinder 609 is connected to the first coil mold base 605 through the pin, so as to realize the up and down flipping of the first coil mold base 605; through the action of the first clamping cylinder 609, the first coil mold base 605 is driven to flip up and down, so as to realize the clamping of the first normalizing coil 606. The second coil mold base 607 is installed on the knob pusher 401 through the upper and lower bearing seats, and the second mold clamping oil cylinder 610 is fixed on 401 through screws. The second mold clamping oil cylinder 610 drives the second coil mold base 607 to rotate horizontally through the gear rack set 612 on the upper part of the second coil mold base 607, thereby realizing the mold clamping of the second normalizing coil 608. Specifically, a rack is installed at the front end of the piston rod of the second mold clamping oil cylinder 610, and a gear is installed on the second coil mold base 607. The gear and the rack are meshed, and the linear motion of the piston rod of the second mold clamping oil cylinder 610 is converted into the horizontal rotation motion of the second coil mold base 607 through the gear rack.

[0060] like Figure 11-Figure 14As shown, the normalizing component 6 of the present application abandons the opening and closing method of the coil of the conventional normalizing component 6. The coil of the conventional normalizing component 6 opens the coil by flipping upward on both sides, and the flipping angles on both sides are the same. Since the bottom lengths of the coils on both sides are the same, a larger flipping angle is required to vertically lift the normalizing component 6 off the rails, so the opening and closing method of this structure cannot meet the narrow space operation of the turnout. The opening and closing of the coil of the normalizing component 6 of the present application is composed of two methods. The opening and closing method of the first normalizing coil 606 is to flip upward in the vertical direction to open, and the bottom of the first normalizing coil 606 is shorter, and it only needs to be opened at a smaller angle to achieve opening, so the normalizing component 6 can be vertically lifted off the rails. The second normalizing coil 608 is opened and closed by horizontal rotation. Since the bottom of the first normalizing coil 606 is short, in order to form a normalizing circuit, the bottom of the second normalizing coil 608 must be lengthened. By rotating horizontally 90°, the bottom of the second normalizing coil 608 can be rotated to avoid the bottom of the rail, thereby ensuring that the normalizing assembly 6 can be vertically lifted off the rail and the coil will not collide with the rail. In addition, both methods require less opening and closing space on both sides of the rail, which can meet the narrow working space of the turnout. Figure 11-Figure 12 The two views are the front view and top view of the coil in the closed state. Figure 13-14 The two views are the front view and the top view of the coil in the open state.

[0061] A first air jet box 613 is installed between the first coil mold base 605 and the first normalizing coil 606, and a second air jet box 614 is installed between the second coil mold base 607 and the second normalizing coil 608, and the center of each air jet box coincides with the center of the corresponding coil. The first air jet box 613 and the second air jet box 614 are both connected to a compressed air source. After the normalizing heating stage is over, the air jet can be turned on immediately to quickly reduce the surface temperature of the rail by compressed air to ensure the quality of normalizing.

[0062] The present application adds a clamp balancing oil cylinder 5 to improve the stability of the welding machine and the straightness of the rail after welding. The tumor-pushing tool holder 401 is guided by the central axis 301, and the tumor-pushing extension rod 402 is only used to transmit the tumor-pushing force without guidance, abandoning the conventional tool holder guide shaft guidance, increasing the rigidity of the tumor-pushing mechanism, reducing the overall deformation of the tool holder during the tumor-pushing process, and preventing the tumor-pushing knife from damaging the parent material after the tumor is pushed.

[0063] The present application adds a normalizing assembly 6 on the basis of a narrow clamping seat welding machine, which can realize the integration of welding and normalizing and improve the construction efficiency. The normalizing assembly 6 of the present application adopts an innovative clamping method that combines rotary clamping and flip clamping at the same time, which can meet the narrow space of the turnout for operation, wherein the rotary clamping refers to the horizontal rotation of the second normalizing coil 608, and the flip clamping refers to the upside-down flipping of the first normalizing coil 606.

[0064] The present application designs the moving end clamp into a pair of center axis 301 ear seat structures to reduce the clamping width of the clamp to meet the clamping length of 450mm of the AT variable section rail of the turnout. The present application adds a heat treatment device to realize the heat treatment function after rail welding. The present application includes a knob pushing cylinder 403, which has a pressure-maintaining knob pushing function, and can also meet the welding requirements of long rails and most turnouts. The present application adopts the DC welding principle, and the flash butt welding clamping mechanism uses high-strength carbon steel, which ensures the strength requirements of the equipment while reducing the size of the equipment.

[0065] Example 3 A narrow body flash welding and heat treatment normalizing method comprises the following steps: Step 1: Before welding, the waist of the AT variable-section rail 10 and the ordinary rail is derusted and descaled, and the tumor pusher is hung on the ordinary rail, and then initially aligned; ensure that the equipment clamping mechanism can fall after opening; the tumor pusher here is a component of other equipment.

[0066] Step 2: Place the narrow-body flash welding and heat treatment normalizing machine right above the AT variable-section rail 10 and the ordinary rail, and the rail top reference block contacts the rail top, and at the same time, the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are clamped, and the working edge of the butt-welded rail is adjusted to align to complete precise positioning; wherein the rail top reference block belongs to the prior art and plays a positioning role, and the working edge alignment means that when the train is running, the rail will only contact one of the two sides of the rail head, and the contact edge is called the working edge, that is, the working variable alignment means that before the two rails are welded, the left and right positions of the two rails need to be adjusted. Due to the manufacturing error of the rails, the alignment can only be based on one of the two sides of the rail head.

[0067] Step 3: The movable upsetting cylinder 302 adjusts the distance between the static end clamping mechanism 1 and the movable end clamping mechanism 2 through the central axis 301 to complete the distance adjustment between the AT variable-section rail 10 and the ordinary rail; the movable upsetting cylinder 302 refers to the upsetting cylinder 302 extending and retracting back and forth.

[0068] Step 4: Start the welding system, connect the welding power supply, energize the DC transformer 8, and start the flash burning process. After 90s~180s, the piston rod of the upsetting cylinder 302 retracts and transmits the force to the moving end clamping mechanism 2 through the central axis 301. Within 0.5s~1s, the static end clamping mechanism 1 and the moving end clamping mechanism 2 are pulled closer to complete the upsetting process. Fig.15As shown, during the upset forging process, the lower part of the clamp of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 is subjected to an outward force F1. The upset forging process is to squeeze the AT variable-section rail and the ordinary rail toward each other. There will be resistance when squeezing the rail, and the resistance will react on the clamping mechanism, which is expressed as force F1. The middle part of the clamp of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 is subjected to an inward pulling force F2 by the upset forging cylinder 302, resulting in an unbalanced force on the clamp. The upper part of the clamp is tilted inward, which will cause the weld of the rail to be concave after welding. The clamp balancing cylinder 5 provides an outward force support F3 on the upper part of the clamp of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2, so that the force on the clamp of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 is balanced, ensuring the straightness of the rail after welding. Step 5: After the upsetting process is completed, the anode-pushing oil cylinder 403 is activated, and the anode-pushing oil cylinder 403 applies force to the anode-pushing tool holder 401 through the anode-pushing extension rod 402, and the anode-pushing tool holder 401 pushes the anode-pushing tool to complete the welding seam anode-pushing, and the anode-pushing oil cylinder 403 retracts the tool holder to complete the entire pressure-maintaining anode-pushing process; Step 6: Open the static end clamping mechanism 1 and the dynamic end clamping mechanism 2, lift the equipment away from the rail, and deal with the residual welding slag and welding nodules on the rail; the welding slag and welding nodules have nothing to do with this equipment, and the welding slag and welding nodules are generated during the welding process.

[0069] Step 7: The narrow-body flash welding and heat treatment normalizing integrated machine is hoisted and placed on the welded rail again. After the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are clamped again, the coils on the normalizing assembly 6 are molded together, and the first normalizing coil 606 is turned down clockwise around the pin of the first coil die base 605 along with the first coil die base 605. The second normalizing coil 608 is driven by the gear rack group 612 and rotates 90° counterclockwise around the plumb line along with the second coil die base 607. The upper and lower surfaces of the first normalizing coil 606 and the second normalizing coil 608 are in contact to form a closed loop. At this time, the coils are disconnected from the normalizing power supply, and the air jet is turned on. The first air jet box 613 and the second air jet box 614 spray compressed air to cool the completed welding seam to below 500°C. Step 8: After the weld temperature drops below 500°C, move the push cylinder 403, adjust the coil position, align the coil center with the weld center, and turn on the normalizing power supply. The normalizing transformer 601 transmits the medium frequency current to the normalizing coil through the normalizing busbar, thereby forming an induction loop. At this time, the coil begins to heat treat the weld. Step 9: After the rail head temperature rises to 900°C, the medium frequency current is automatically cut off and stopped, and the air spray is immediately turned on to cool the rail surface temperature to below 500°C through compressed air again to complete the heat treatment process.

[0070] Example 4 like Figure 1As shown, a narrow-body flash welding and heat treatment normalizing integrated machine includes a static end clamping mechanism 1, a dynamic end clamping mechanism 2, a pressure-maintaining and nodule-pushing mechanism 4, a normalizing component 6, a center shaft upsetting structure 3 and a clamp balancing cylinder 5; the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are distributed at both ends of the integrated machine, the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are connected through the center shaft upsetting structure 3, a pressure-maintaining and nodule-pushing mechanism 4 and a clamp balancing cylinder 5 for providing outward supporting force to the clamp are installed between the static end clamping mechanism 1 and the dynamic end clamping mechanism 2, and a normalizing component 6 combining rotary mold clamping and flip mold clamping is installed on the pressure-maintaining and nodule-pushing mechanism 4.

[0071] like Figure 2 As shown, the central shaft upsetting structure 3 includes a central shaft 301 and an upsetting cylinder 302 , and the central shaft 301 and the upsetting cylinder 302 are connected by threads.

[0072] The static end clamping mechanism 1 includes a clamping cylinder 101, a first static end clamp 102 and a second static end clamp 103. The clamping cylinder 101 is connected to the first static end clamp 102 and the second static end clamp 103. The opening and closing center of the static end clamping mechanism 1 is the axis of the central axis 301. The opening and closing of the first static end clamp 102 and the second static end clamp 103 are realized by the clamping cylinder 101.

[0073] like Figure 3 As shown, the first clamp 102 at the static end is provided with a first center axis single ear seat 1021 and a first center axis double ear seat 1022, and the second clamp 103 at the static end is provided with a second center axis double ear seat 1031 and a second center axis single ear seat 1032, wherein the first center axis single ear seat 1021 and the second center axis double ear seat 1031 are a pair of center axis 301 ear seats, the first center axis double ear seat 1022 and the second center axis single ear seat 1032 are a pair of center axis 301 ear seats, the center axis 301 passes through the two pairs of center axis 301 ear seats, and the clamp is clamped and opened by rotating with the center line of the center axis 301 as the axis, and the clamping length of the static end clamping mechanism 1 is 567mm. The clamping length here refers to the length of the static end clamping mechanism 1 in contact with the ordinary rail 11 when it is in the clamping state, such as Figure 6 Length indicated at lower right.

[0074] like Figure 4 As shown, the movable end clamping mechanism 2 comprises a clamping oil cylinder 101, a movable end first clamp 201 and a movable end second clamp 202, the clamping oil cylinder 101 is connected to the movable end first clamp 201 and the movable end second clamp 202, the opening and closing center of the movable end clamping mechanism 2 is the axis of the central axis 301, and the opening and closing of the movable end first clamp 201 and the movable end second clamp 202 is realized by the clamping oil cylinder 101. The static end clamping mechanism 1 and the movable end clamping mechanism 2 are opened and closed synchronously.

[0075] like Figure 5 As shown, a third center axis double-ear seat 2011 is provided on the first clamp 201 at the moving end, and a third center axis single-ear seat 2021 is provided on the second clamp 202 at the moving end. The third center axis double-ear seat 2011 and the third center axis single-ear seat 2021 are a pair of center axis 301 ear seats and are penetrated by the center axis 301, and rotate with the center line of the center axis 301 as the axis to realize the clamping and opening of the clamp. The clamping length of the moving end clamping mechanism 2 is 300mm. When welding turnouts, the AT variable-section rail 10 has only a clamping length of 450mm, which can be clamped by the moving end clamping mechanism 2. The clamping length here refers to the length of the moving end clamping mechanism 2 in contact with the ordinary rail 11 when it is in the clamped state. Figure 6 Length indicated at lower left.

[0076] There are two clamp balancing oil cylinders 5, which are respectively installed on both sides of the upper part of the integrated machine. The clamp balancing oil cylinders 5 on each side respectively provide clamp support force between the clamps of the static end clamping mechanism 1 and the clamps of the dynamic end clamping mechanism 2. During the upsetting process, the clamp balancing oil cylinders 5 provide support force to the clamps of the static end clamping mechanism 1 and the clamps of the dynamic end clamping mechanism 2, so that the forces on the clamps of the static end clamping mechanism 1 and the clamps of the dynamic end clamping mechanism 2 remain balanced.

[0077] A conductive shaft 7 is provided below each clamp balancing cylinder 5, and the conductive shaft 7 runs through the inside of the clamps of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 to achieve synchronous opening and closing of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2. One end of the conductive shaft 7 passes through the dynamic end clamping mechanism 2 and is connected to a DC transformer 8 outside the dynamic end clamping mechanism 2.

[0078] like Figure 6-Figure 8 As shown, the pressure-maintaining and tummy-pushing mechanism 4 includes a tummy-pushing tool holder 401, a tummy-pushing extension rod 402, and a tummy-pushing oil cylinder 403. The central axis 301 of the central axis upsetting structure 3 passes through the tummy-pushing tool holder 401, and the tummy-pushing tool holder 401 is guided by the central axis 301. Both sides of the tummy-pushing tool holder 401 are provided with tool holder waist-shaped holes 4011. The tummy-pushing extension rod 402 passes through the tool holder waist-shaped holes 4011 and is connected by screws. The tummy-pushing extension rod 402 can slide up and down in the tool holder waist-shaped holes 4011. The tummy-pushing oil cylinder 403 is connected to the tummy-pushing extension rod 402 by threads, and the tummy-pushing oil cylinder 403 and the tummy-pushing extension rod 402 are installed on the static end clamping mechanism 1. A tummy-pushing oil cylinder 403 is installed on each of the static end first clamp 102 and the static end second clamp 103 of the static end first clamp 102, and each tummy-pushing oil cylinder 403 is connected to a tummy-pushing extension rod 402.

[0079] The anode pushing tool holder 401 of the pressure-maintaining anode pushing mechanism 4 of the present application adopts the central axis 301 as a guide, abandoning the conventional guide structure of the anode pushing cylinder 403 and the extension rod 402. At the same time, the installation position of the anode pushing cylinder 403 is higher than the top surface of the ordinary rail 11. The purpose is to reduce the space at the bottom of the equipment, so that the equipment can operate in the narrow space of the turnout.

[0080] like Figure 9-10 As shown, the normalizing component 6 is installed on the tumor pushing tool holder 401 of the pressure-maintaining tumor pushing mechanism 4. The normalizing component 6 moves with the tumor pushing tool holder 401. During normalizing, the normalizing coil position is adjusted to align with the weld through the tumor pushing cylinder 403. The normalizing component 6 includes a normalizing transformer 601 installed on the upper part of the tumor pushing tool holder 401. The two poles of the normalizing transformer 601 are respectively connected to the first normalizing coil 606 and the second normalizing coil 608 through the first normalizing bus 602 and the second normalizing bus 603. The first normalizing coil 606 is fixed on the first coil mold base 605, and the two are completely insulated; the second normalizing coil 608 is fixed on the second coil mold base 607, and the two are completely insulated; and the bottom of the first normalizing coil 606 is shorter than the bottom of the second normalizing coil 608; the first coil mold base 605 is connected to the tumor pushing tool holder 401 through the first coil mold base rotating pin 611, and the first clamping cylinder 609 is connected to the first coil mold base 605 through the pin, so as to realize the up and down flipping of the first coil mold base 605; through the action of the first clamping cylinder 609, the first coil mold base 605 is driven to flip up and down, so as to realize the clamping of the first normalizing coil 606. The second coil mold base 607 is installed on the knob pusher 401 through the upper and lower bearing seats, and the second mold clamping oil cylinder 610 is fixed on 401 through screws. The second mold clamping oil cylinder 610 drives the second coil mold base 607 to rotate horizontally through the gear rack set 612 on the upper part of the second coil mold base 607, thereby realizing the mold clamping of the second normalizing coil 608. Specifically, a rack is installed at the front end of the piston rod of the second mold clamping oil cylinder 610, and a gear is installed on the second coil mold base 607. The gear and the rack are meshed, and the linear motion of the piston rod of the second mold clamping oil cylinder 610 is converted into the horizontal rotation motion of the second coil mold base 607 through the gear rack.

[0081] like Figure 11-Figure 14As shown, the normalizing component 6 of the present application abandons the opening and closing method of the coil of the conventional normalizing component 6. The coil of the conventional normalizing component 6 opens the coil by flipping upward on both sides, and the flipping angles on both sides are the same. Since the bottom lengths of the coils on both sides are the same, a larger flipping angle is required to vertically lift the normalizing component 6 off the rails, so the opening and closing method of this structure cannot meet the narrow space operation of the turnout. The opening and closing of the coil of the normalizing component 6 of the present application is composed of two methods. The opening and closing method of the first normalizing coil 606 is to flip upward in the vertical direction to open, and the bottom of the first normalizing coil 606 is shorter, and it only needs to be opened at a smaller angle to achieve opening, so the normalizing component 6 can be vertically lifted off the rails. The second normalizing coil 608 is opened and closed by horizontal rotation. Since the bottom of the first normalizing coil 606 is short, in order to form a normalizing circuit, the bottom of the second normalizing coil 608 must be lengthened. By rotating horizontally 90°, the bottom of the second normalizing coil 608 can be rotated to avoid the bottom of the rail, thereby ensuring that the normalizing assembly 6 can be vertically lifted off the rail and the coil will not collide with the rail. In addition, both methods require less opening and closing space on both sides of the rail, which can meet the narrow working space of the turnout. Figure 11-Figure 12 The two views are the front view and top view of the coil in the closed state. Figure 13-14 The two views are the front view and the top view of the coil in the open state.

[0082] A first air jet box 613 is installed between the first coil mold base 605 and the first normalizing coil 606, and a second air jet box 614 is installed between the second coil mold base 607 and the second normalizing coil 608, and the center of each air jet box coincides with the center of the corresponding coil. The first air jet box 613 and the second air jet box 614 are both connected to a compressed air source. After the normalizing heating stage is over, the air jet can be turned on immediately to quickly reduce the surface temperature of the rail by compressed air to ensure the quality of normalizing.

[0083] The present application adds a clamp balancing oil cylinder 5 to improve the stability of the welding machine and the straightness of the rail after welding. The tumor-pushing tool holder 401 is guided by the central axis 301, and the tumor-pushing extension rod 402 is only used to transmit the tumor-pushing force without guidance, abandoning the conventional tool holder guide shaft guidance, increasing the rigidity of the tumor-pushing mechanism, reducing the overall deformation of the tool holder during the tumor-pushing process, and preventing the tumor-pushing knife from damaging the parent material after the tumor is pushed.

[0084] The present application adds a normalizing assembly 6 on the basis of a narrow clamping seat welding machine, which can realize the integration of welding and normalizing and improve the construction efficiency. The normalizing assembly 6 of the present application adopts an innovative clamping method that combines rotary clamping and flip clamping at the same time, which can meet the narrow space of the turnout for operation, wherein the rotary clamping refers to the horizontal rotation of the second normalizing coil 608, and the flip clamping refers to the upside-down flipping of the first normalizing coil 606.

[0085] The present application designs the moving end clamp into a pair of center axis 301 ear seat structures to reduce the clamping width of the clamp to meet the clamping length of 450mm of the AT variable section rail of the turnout. The present application adds a heat treatment device to realize the heat treatment function after rail welding. The present application includes a knob pushing cylinder 403, which has a pressure-maintaining knob pushing function, and can also meet the welding requirements of long rails and most turnouts. The present application adopts the DC welding principle, and the flash butt welding clamping mechanism uses high-strength carbon steel, which ensures the strength requirements of the equipment while reducing the size of the equipment.

[0086] A narrow body flash welding and heat treatment normalizing method comprises the following steps: Step 1: Before welding, the waist of the AT variable-section rail 10 and the ordinary rail is derusted and descaled, and the tumor pusher is hung on the ordinary rail, and then initially aligned; ensure that the equipment clamping mechanism can fall after opening; the tumor pusher here is a component of other equipment.

[0087] Step 2: Place the narrow-body flash welding and heat treatment normalizing machine right above the AT variable-section rail 10 and the ordinary rail, and the rail top reference block contacts the rail top, and at the same time, the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are clamped, and the working edge of the butt-welded rail is adjusted to align to complete precise positioning; wherein the rail top reference block belongs to the prior art and plays a positioning role, and the working edge alignment means that when the train is running, the rail will only contact one of the two sides of the rail head, and the contact edge is called the working edge, that is, the working variable alignment means that before the two rails are welded, the left and right positions of the two rails need to be adjusted. Due to the manufacturing error of the rails, the alignment can only be based on one of the two sides of the rail head.

[0088] Step 3: The movable upsetting cylinder 302 adjusts the distance between the static end clamping mechanism 1 and the movable end clamping mechanism 2 through the central axis 301 to complete the distance adjustment between the AT variable-section rail 10 and the ordinary rail; the movable upsetting cylinder 302 refers to the upsetting cylinder 302 extending and retracting back and forth.

[0089] Step 4: Start the welding system, connect the welding power supply, energize the DC transformer 8, and start the flash burning process. After 90s~180s, the piston rod of the upsetting cylinder 302 retracts and transmits the force to the moving end clamping mechanism 2 through the central axis 301. Within 0.5s~1s, the static end clamping mechanism 1 and the moving end clamping mechanism 2 are pulled closer to complete the upsetting process. Fig.15As shown, during the upset forging process, the lower part of the clamp of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 is subjected to an outward force F1. The upset forging process is to squeeze the AT variable-section rail and the ordinary rail toward each other. There will be resistance when squeezing the rail, and the resistance will react on the clamping mechanism, which is expressed as force F1. The middle part of the clamp of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 is subjected to an inward pulling force F2 by the upset forging cylinder 302, resulting in an unbalanced force on the clamp. The upper part of the clamp is tilted inward, which will cause the weld of the rail to be concave after welding. The clamp balancing cylinder 5 provides an outward force support F3 on the upper part of the clamp of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2, so that the force on the clamp of the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 is balanced, ensuring the straightness of the rail after welding. Step 5: After the upsetting process is completed, the anode-pushing oil cylinder 403 is activated, and the anode-pushing oil cylinder 403 applies force to the anode-pushing tool holder 401 through the anode-pushing extension rod 402, and the anode-pushing tool holder 401 pushes the anode-pushing tool to complete the welding seam anode-pushing, and the anode-pushing oil cylinder 403 retracts the tool holder to complete the entire pressure-maintaining anode-pushing process; Step 6: Open the static end clamping mechanism 1 and the dynamic end clamping mechanism 2, lift the equipment away from the rail, and deal with the residual welding slag and welding nodules on the rail; the welding slag and welding nodules have nothing to do with this equipment, and the welding slag and welding nodules are generated during the welding process.

[0090] Step 7: The narrow-body flash welding and heat treatment normalizing integrated machine is hoisted and placed on the welded rail again. After the static end clamping mechanism 1 and the dynamic end clamping mechanism 2 are clamped again, the coils on the normalizing assembly 6 are molded together, and the first normalizing coil 606 is turned down clockwise around the pin of the first coil die base 605 along with the first coil die base 605. The second normalizing coil 608 is driven by the gear rack group 612 and rotates 90° counterclockwise around the plumb line along with the second coil die base 607. The upper and lower surfaces of the first normalizing coil 606 and the second normalizing coil 608 are in contact to form a closed loop. At this time, the coils are disconnected from the normalizing power supply, and the air jet is turned on. The first air jet box 613 and the second air jet box 614 spray compressed air to cool the completed welding seam to below 500°C. Step 8: After the weld temperature drops below 500°C, move the push cylinder 403, adjust the coil position, align the coil center with the weld center, and turn on the normalizing power supply. The normalizing transformer 601 transmits the medium frequency current to the normalizing coil through the normalizing busbar, thereby forming an induction loop. At this time, the coil begins to heat treat the weld. Step 9: After the rail head temperature rises to 900°C, the medium frequency current is automatically cut off and stopped, and the air spray is immediately turned on to cool the rail surface temperature to below 500°C through compressed air again to complete the heat treatment process.

Claims

1. A narrow body flash welding and heat treatment normalizing integrated machine, characterized in that: The invention comprises a static end clamping mechanism (1), a dynamic end clamping mechanism (2), a pressure-maintaining and nodule-pushing mechanism (4), a normalizing component (6), a center shaft upsetting structure (3) and a clamp balancing oil cylinder (5); the static end clamping mechanism (1) and the dynamic end clamping mechanism (2) are distributed at two ends of the integrated machine; the static end clamping mechanism (1) and the dynamic end clamping mechanism (2) are connected through the center shaft upsetting structure (3); a pressure-maintaining and nodule-pushing mechanism (4) and a clamp balancing oil cylinder (5) for providing an outward supporting force to the clamp are installed between the static end clamping mechanism (1) and the dynamic end clamping mechanism (2); and a normalizing component (6) combining a rotary mold clamping and a flip mold clamping is installed on the pressure-maintaining and nodule-pushing mechanism (4).

2. A narrow body flash welding and heat treatment normalizing integrated machine according to claim 1, characterized in that: The central shaft upsetting structure (3) comprises a central shaft (301) and an upsetting oil cylinder (302), and the central shaft (301) and the upsetting oil cylinder (302) are connected via threads.

3. A narrow body flash welding and heat treatment normalizing integrated machine according to claim 2, characterized in that: The static end clamping mechanism (1) comprises a clamping cylinder (101), a first static end clamp (102) and a second static end clamp (103); the clamping cylinder (101) is connected to the first static end clamp (102) and the second static end clamp (103); the opening and closing center of the static end clamping mechanism (1) is the axis of the central axis (301); The movable end clamping mechanism (2) comprises a clamping cylinder (101), a movable end first clamp (201) and a movable end second clamp (202); the clamping cylinder (101) is connected to the movable end first clamp (201) and the movable end second clamp (202); the opening and closing center of the movable end clamping mechanism (2) is the axis of the central axis (301).

4. A narrow body flash welding and heat treatment normalizing integrated machine according to claim 1, characterized in that: The first clamp (102) at the static end is provided with a first central axis single ear seat (1021) and a first central axis double ear seat (1022), and the second clamp (103) at the static end is provided with a second central axis double ear seat (1031) and a second central axis single ear seat (1032), wherein the first central axis single ear seat (1021) and the second central axis double ear seat (1031) are a pair of central axis (301) ear seats, the first central axis double ear seat (1022) and the second central axis single ear seat (1032) are a pair of central axis (301) ear seats, the central axis (301) passes through the two pairs of central axis (301) ear seats, and the clamp is clamped and opened by rotating with the center line of the central axis (301) as the axis, and the clamping length of the static end clamping mechanism (1) is 567 mm; The first clamp (201) at the movable end is provided with a third center axis double ear seat (2011), and the second clamp (202) at the movable end is provided with a third center axis single ear seat (221). The third center axis double ear seat (2011) and the third center axis single ear seat (221) are a pair of center axis (301) ear seats and are penetrated by the center axis (301). The clamps are rotated with the center line of the center axis (301) as the axis to achieve clamping and opening. The clamping length of the movable end clamping mechanism (2) is 300 mm.

5. The narrow body flash welding and heat treatment normalizing integrated machine according to claim 1, characterized in that: There are two clamp balancing oil cylinders (5), which are respectively installed on both sides of the upper part of the integrated machine. The clamp balancing oil cylinders (5) on each side are respectively connected to the clamp of the static end clamping mechanism (1) and the clamp of the dynamic end clamping mechanism (2) to provide clamp supporting force.

6. The narrow body flash welding and heat treatment normalizing integrated machine according to claim 1, characterized in that: A conductive shaft (7) is provided below each clamp balancing cylinder (5), and the conductive shaft (7) passes through the inside of the clamps of the static end clamping mechanism (1) and the dynamic end clamping mechanism (2). One end of the conductive shaft (7) passes through the dynamic end clamping mechanism (2) and is connected to a DC transformer (8) outside the dynamic end clamping mechanism (2).

7. The narrow body flash welding and heat treatment normalizing integrated machine according to claim 1, characterized in that: The pressure-maintaining tumor-pushing mechanism (4) comprises a tumor-pushing tool holder (401), a tumor-pushing extension rod (402) and a tumor-pushing oil cylinder (403); the central axis (301) of the central axis top forging structure (3) passes through the tumor-pushing tool holder (401); the tumor-pushing tool holder (401) is guided by the central axis (301); tool holder waist-shaped holes (4011) are provided on both sides of the tumor-pushing tool holder (401); the tumor-pushing extension rod (402) passes through the tool holder waist-shaped holes (4011) and is connected by screws; the tumor-pushing oil cylinder (403) and the tumor-pushing extension rod (402) are connected by threads; and the tumor-pushing oil cylinder (403) and the tumor-pushing extension rod (402) are mounted on the static end clamping mechanism (1).

8. The narrow body flash welding and heat treatment normalizing integrated machine according to claim 1, characterized in that: The normalizing assembly (6) is mounted on the tumor-pushing tool holder (401) of the pressure-maintaining tumor-pushing mechanism (4). The normalizing assembly (6) comprises a normalizing transformer (601) mounted on the upper part of the tumor-pushing tool holder (401). The two poles of the normalizing transformer (601) are respectively connected to the first normalizing coil (606) and the second normalizing coil (608) via a first normalizing busbar (602) and a second normalizing busbar (603). The first normalizing coil (606) is fixed on the first coil die base (605); the second normalizing coil (608) is fixed on the second coil die base (607); and the bottom of the first normalizing coil (606) is shorter than the bottom of the second normalizing coil (608). The bottom of the normalizing coil (608); the first coil mold base (605) is connected to the anti-bulge tool holder (401) through the first coil mold base rotating pin (611), and the first mold clamping cylinder (609) is connected to the first coil mold base (605) through the pin, so as to realize the upside down turning of the first coil mold base (605); the second coil mold base (607) is installed on the anti-bulge tool holder (401) through the upper and lower bearing seats, and the second mold clamping cylinder (610) drives the second coil mold base (607) to rotate horizontally through the gear rack group (612) on the upper part of the second coil mold base (607), so as to realize the second normalizing coil (608) mold clamping.

9. A narrow body flash welding and heat treatment normalizing integrated machine according to claim 8, characterized in that: A first air jet box (613) is installed between the first coil mold base (605) and the first normalizing coil (606), and a second air jet box (614) is installed between the second coil mold base (607) and the second normalizing coil (608), and the center of each air jet box coincides with the center of the corresponding coil, and the first air jet box (613) and the second air jet box (614) are both connected to a compressed air source.

10. A narrow body flash welding and heat treatment normalizing method, characterized in that: The steps include: Step 1: Before welding, the waists of the AT variable-section rail (10) and the ordinary rail are derusted and descaled, a tumor-removing knife is hung on the ordinary rail, and then initial alignment is performed; Step 2: The narrow-body flash welding and heat treatment normalizing integrated machine is placed directly above the AT variable-section rail (10) and the ordinary rail, and the rail top reference block is in contact with the rail top. At the same time, the static end clamping mechanism (1) and the dynamic end clamping mechanism (2) are clamped, and the working edges of the butt-welded rails are adjusted to align, thereby completing precise positioning; Step 3: The movable upsetting cylinder (302) adjusts the distance between the static end clamping mechanism (1) and the movable end clamping mechanism (2) through the central axis (301), thereby completing the distance adjustment between the AT variable-section rail (10) and the ordinary rail; Step 4: Start the welding system, connect the welding power supply, energize the DC transformer (8), and start the flash burning process. After 90s to 180s, the piston rod of the upsetting cylinder (302) retracts and transmits the force to the moving end clamping mechanism (2) through the central axis (301). Within 0.5s to 1s, the static end clamping mechanism (1) and the moving end clamping mechanism (2) are pulled closer to complete the upsetting process. During the upsetting process, the static end clamping mechanism (1) and the moving end clamping mechanism (2) are The lower part of the clamp of the mechanism (2) is subjected to an outward force F1, the middle part of the clamp of the static end clamping mechanism (1) and the dynamic end clamping mechanism (2) is subjected to an inward pulling force F2 by the top forging cylinder (302), and the clamp balancing cylinder (5) provides an outward force support F3 at the upper part of the clamp of the static end clamping mechanism (1) and the dynamic end clamping mechanism (2), so that the forces of the clamp of the static end clamping mechanism (1) and the dynamic end clamping mechanism (2) are balanced, thereby ensuring the straightness of the rail after welding; Step 5: After the upsetting process is completed, the anode-pushing oil cylinder (403) is activated, and the anode-pushing oil cylinder (403) applies force to the anode-pushing tool holder (401) through the anode-pushing extension rod (402), and the anode-pushing tool holder (401) pushes the anode-pushing tool to complete the welding seam anode-pushing, and the anode-pushing oil cylinder (403) retracts the tool holder to complete the entire pressure-maintaining anode-pushing process; Step 6: Open the static end clamping mechanism (1) and the dynamic end clamping mechanism (2), lift the device off the rail, and deal with the residual welding slag and weld nodules on the rail; Step 7: The narrow-body flash welding and heat treatment normalizing machine is hoisted again on the welded rail. After the static end clamping mechanism (1) and the dynamic end clamping mechanism (2) are clamped again, the coils on the normalizing assembly (6) are molded together, and the first normalizing coil (606) is turned down clockwise around the pin of the first coil mold base (605) along with the first coil mold base (605). The second normalizing coil (608) is driven by the gear rack assembly (612) and the second coil mold base (607) and rotates 90 degrees counterclockwise around the plumb line. The upper and lower surfaces of the first normalizing coil (606) and the second normalizing coil (608) are in contact to form a closed circuit. At this time, the coils are disconnected from the normalizing power supply, and the air spray is turned on. The first air spray box (613) and the second air spray box (614) spray compressed air to cool the completed welding seam to below 500°C. Step 8: After the temperature of the weld drops below 500°C, the push cylinder (403) is moved to adjust the position of the coil, align the center of the coil with the center of the weld, and turn on the normalizing power supply. The normalizing transformer (601) transmits the medium frequency current to the normalizing coil through the normalizing busbar, thereby forming an induction loop. At this time, the coil begins to heat treat the weld. Step 9: After the rail head temperature rises to 900°C, the medium frequency current is automatically cut off and stopped, and the air spray is immediately turned on to cool the rail surface temperature to below 500°C through compressed air again to complete the heat treatment process.

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