Fixed steel rail normalizing equipment and method

Abstract

The invention relates to the technical field of steel rail flash welding, in particular to fixed steel rail normalizing equipment and method.The equipment comprises a movable trolley, a hydraulic pump station, a control cabinet, a machine head mounting base assembly and a steel rail guiding and supporting device are arranged on the movable trolley, and a normalizing machine head assembly is mounted on the machine head mounting base assembly; a coil opening and closing oil cylinder of the normalizing machine head assembly is hinged to a coil die holder, a normalizing coil comprises a left coil and a right coil, the left coil and the right coil are installed on the left coil die holder and the right coil die holder respectively and connected with a transformer through a busbar, and the air spraying device sprays air from the rail top, the rail bottom and the rail webs on the two sides. According to the automatic special equipment, the automation degree of the equipment is improved by achieving the functions of automatically positioning a welding seam and aligning and clamping a normalizing coil, and manual construction errors are reduced; and the normalizing efficiency and the normalizing quality of the steel rail are obviously improved.

Description

Technical Field

[0001] This application relates to the field of flash welding technology for rails, specifically to a fixed rail normalizing equipment and method suitable for base rail production lines, featuring dual-frequency automatic switching heating, intelligent positioning, and data collaborative management functions. Background Technology

[0002] According to the requirements of "TB / T1632.2-2014 Rail Welding Part 2 Flash Welding", rails need to undergo heat treatment (normalizing) after welding. Medium frequency electric normalizing or flame swing normalizing can be used for rail normalizing after welding. When normalizing rails, the initial heating temperature should be lower than 500℃ (rail head surface), the rail head heating temperature should be 900℃±20℃, and the rail base corner heating temperature should be 800℃~850℃ (the rail foot temperature measurement position is within 10mm inward from the edge of the rail foot); the rail head under-speed quenching should be cooled by jet compressed air.

[0003] The existing rail normalizing equipment has the following technical defects: The system fails to meet the high-precision and intelligent production requirements of seamless high-speed rail lines: Rotary coils are cumbersome to assemble and disassemble, requiring the removal of pins to replace different coil models, resulting in low maintenance efficiency; it lacks a rapid adaptation structure for different rail specifications, leading to insufficient versatility; and production data is only stored locally, hindering cross-departmental collaborative management. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this application proposes a fixed rail normalizing device that integrates dual-frequency automatic heating, precise automatic positioning, collaborative data management, and multi-scenario adaptability, thereby comprehensively improving the normalizing accuracy, efficiency, and intelligence level.

[0005] To achieve the above-mentioned objectives, the technical solution of this application is as follows: A fixed rail normalizing device includes a mobile trolley, on which a hydraulic pump station, a control cabinet, a machine head mounting base assembly, and a rail guide support device are respectively installed. A normalizing machine head assembly is installed on the machine head mounting base assembly. The normalizing head assembly includes a temperature sensor, a laser displacement sensor, a normalizing coil, a coil mold base, a transformer, and an air jetting device. The coil opening and closing cylinder is hinged to the coil mold base. The normalizing coil includes a left coil and a right coil, which are respectively installed on the left and right coil mold bases and are both connected to the transformer through a busbar. The air jetting device sprays air from the top of the rail, the bottom of the rail, and the sides of the rail.

[0006] Furthermore, the transformer is adapted to both 1553Hz low frequency and 2215Hz high frequency.

[0007] Furthermore, the air jet device includes four air jet boxes, which are arranged sequentially on both sides of the rail top, rail bottom, and rail waist. Each air jet box is connected to two air pipes and connected to the main air line through a ball valve.

[0008] Furthermore, the normalizer head assembly also includes a temperature display instrument, a straight-through baffle flow switch, a left and right lateral nut assembly, and a first proximity switch. The straight-through baffle flow switch is installed in the water circuit, the left and right lateral nut assembly is installed at the bottom of the normalizer head assembly, the first proximity switch is fixedly installed on one side parallel to the coil, and the temperature display instrument corresponds to the probe of a temperature sensor.

[0009] Furthermore, the control cabinet includes an electrical control cabinet and a normalizing power supply control cabinet, which are fixed on both sides of the hydraulic pump station respectively. The electrical control cabinet is equipped with a programmable logic controller (PLC) that transmits data to the ERP data collaborative management system. The normalizing power supply control cabinet is equipped with a normalizing power supply, contactors, and water-cooled capacitors.

[0010] Furthermore, the mobile trolley includes a trolley frame, on which limit switches, drive motors, master and slave wheel axle assemblies, and pull rope sensors are installed. The mobile trolley is used to carry the remaining equipment components.

[0011] Furthermore, the machine head mounting base assembly includes a machine head mounting bracket, on which a cable chain, left and right lead screws, a linear guide rail slider assembly, auxiliary support rollers, and a rail anti-deviation guide plate are mounted; rail anti-deviation guide plates are mounted on the upper parts of both ends of the machine head mounting bracket, and the rail anti-deviation guide plates are connected to the auxiliary support rollers; linear guide rail slider assemblies are mounted on both sides of the machine head mounting bracket, and a second proximity switch is provided below the linear guide rail slider assembly; the cable chain is mounted on the bottom of the machine head mounting bracket; and the left and right lead screws are fixedly mounted on the inner side of the machine head mounting bracket.

[0012] Furthermore, the rail guide support device includes a guide support fixing bracket, on which a rail bottom roller assembly, a side guide roller and a rail top roller are provided. A rail top pressing mechanism and an automatic centering clamping mechanism are connected above the rail top roller. The automatic centering clamping mechanism is connected to a clamping cylinder.

[0013] Furthermore, the main pump station of the hydraulic pump station is fixed on one side of the mobile trolley. The hydraulic pump station provides a power source for the equipment's actuating mechanism. It drives a hydraulic piston pump through a three-phase asynchronous motor to provide hydraulic oil to the entire hydraulic pump station. The pressure of different pipelines is set and adjusted through relief valves and pressure reducing valves to provide the system with both high-pressure and low-pressure operating conditions.

[0014] A method for normalizing fixed steel rails includes the following steps: Step 1: Check whether the mold base coil, automatic centering clamping mechanism and rail top clamping mechanism of the fixed rail normalizing equipment are in the open state to avoid interference and collision with the rail; Step 2: After the roller conveyor moves the rail welding head to the center of the fixed normalizing station, the roller conveyor is locked. Step 3: Click on automatic weld seam positioning, and the moving trolley will automatically move to the point where the mold base coil and the rail weld seam roughly coincide; Step 4: Check if the rail position is correct. Align the weld seam with the fine-tuning coil using the lead screw slider, and rotate the corresponding knob to fix the rail with the centering clamping mechanism and the pressing mechanism. Step 5: The mold base coil closes, switch to automatic mode, press and hold the normalizing start button, the normalizing equipment starts, and performs dual-frequency normalizing on the rail joint, automatically switching between low frequency and high frequency (automatically setting the phase change temperature); Step 6: After normalizing, the mold base coil automatically opens, the clamping and pressing devices are released, and the normalizing head assembly automatically moves to the air spray position to cool the weld seam (if no air spray is selected, there will be no movement of the head assembly). Step 7: Cool to the set temperature, stop the airflow, and the coil servo shaft will automatically return to the origin.

[0015] Step 8: Enable the roller conveyor line and the rails move to the next station.

[0016] The advantages of this application are: 1. This application proposes an automated special equipment that improves the automation level of the equipment and reduces human error by realizing the functions of automatic positioning of weld seams and alignment and clamping of normalizing coils; it significantly improves the efficiency and quality of rail normalizing.

[0017] 2. This application uses a coil opening and closing cylinder to hinge with the coil mold base, driving the left and right coils to move and close along the horizontal guide rail. Compared with the rotary hinge, the horizontal guide rail has a lower mechanical wear rate and higher precision. Moreover, the translational structure does not require disassembly of the pin shaft, resulting in shorter coil replacement time and significantly improved maintenance efficiency.

[0018] 3. The transformer in this application is compatible with 1553Hz low frequency and 2215Hz high frequency. The PLC automatically switches the frequency according to the phase transition temperature of the rail (Ac3=850℃) detected by the temperature sensor. Low frequency heating is used to ensure depth in the low temperature stage (500℃-850℃) and high frequency heating is used to ensure uniformity in the high temperature stage (850℃-920℃). It is compatible with rails of different materials for ordinary speed and high speed railways.

[0019] 4. This application uses a laser displacement sensor on the normalizing head to scan the weld contour and a rope sensor on the moving trolley to record position data, with a positioning error of ≤ ±0.3mm. During the air spraying stage, the screw mechanism on the mounting base of the head drives the head assembly to move precisely, eliminating the need for a moving trolley and improving the alignment efficiency by 40%.

[0020] 5. The PLC of the control cabinet in this application uploads data such as normalizing temperature, frequency, air jet parameters, clamping force, and equipment status to the ERP system in real time, supporting cross-departmental collaboration in production scheduling, quality traceability, and equipment maintenance. Attached Figure Description

[0021] Figure 1 , Figure 2 This is a structural schematic diagram of a fixed rail normalizing equipment assembly according to an embodiment of this application.

[0022] Figure 3 , Figure 4 This is a schematic diagram of the structure of a normalizing head assembly according to an embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the structure of a head mounting base assembly according to an embodiment of this application.

[0024] Figures 6-7 This is a structural schematic diagram of a rail guide support device according to an embodiment of this application.

[0025] Figure 8 This is a schematic diagram of the structure of a rail spraying device according to an embodiment of this application.

[0026] Figure 9 This is a schematic diagram of the human-machine interface of a fixed rail normalizing equipment according to an embodiment of this application.

[0027] In the attached image: 100-Head assembly, 200-Head mounting base assembly, 300-Rail guide support device, 400-Mobile trolley, 500-Control cabinet, 600-Hydraulic pump station, 101-Temperature sensor, 102-Busbar, 103-Coil opening and closing cylinder, 104-Normalizing coil, 105-Coil mold base, 106-Transformer, 107-Temperature display instrument, 108-Straight-through baffle type flow switch, 109-Left and right lateral sliding nut assembly, 110 - First proximity switch, 201- Rail anti-deviation guide plate, 202- Auxiliary support roller, 203- Cable chain, 204- Linear guide rail slider assembly, 205- Second proximity switch, 206- Left and right lead screws, 207- Machine head mounting bracket, 301- Rail top clamping mechanism, 302- Side guide roller, 303- Rail bottom roller assembly, 304- Automatic centering clamping mechanism, 305- Clamping cylinder, 306- Rail top roller, 307- Guide support fixing bracket. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the invention clearer, the technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this invention, it should be noted that the terms "upper," "vertical," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Example 1 like Figure 1 and Figure 2 As shown, a fixed rail normalizing equipment includes a mobile trolley 400, on which a hydraulic pump station 600, a control cabinet 500, a machine head mounting base assembly 200 and a rail guide support device 300 are respectively installed. A normalizing machine head assembly 100 is installed on the machine head mounting base assembly 200. The normalizing head assembly 100 includes a temperature sensor 101, a laser displacement sensor, a normalizing coil 104, a coil mold base 105, a transformer 106, and an air jet device. A coil opening / closing cylinder 103 is hinged to the coil mold base 105. The normalizing coil 104 includes a left coil and a right coil, which are respectively mounted on the left and right coil mold bases 105 and connected to the transformer 106 via a busbar 102. The air jet device sprays air from the top, bottom, and sides of the rail. During operation, the coil opening / closing cylinder 103 completely closes the two coils to form a circuit, achieving induction heating normalizing.

[0033] Example 2 like Figure 1 and Figure 2 As shown, a fixed rail normalizing equipment includes a mobile trolley 400, on which a hydraulic pump station 600, a control cabinet 500, a machine head mounting base assembly 200 and a rail guide support device 300 are respectively installed. A normalizing machine head assembly 100 is installed on the machine head mounting base assembly 200. The normalizing head assembly 100 includes a temperature sensor 101, a laser displacement sensor, a normalizing coil 104, a coil mold base 105, a transformer 106, and an air jet device. A coil opening / closing cylinder 103 is hinged to the coil mold base 105. The normalizing coil 104 includes a left coil and a right coil, which are respectively mounted on the left and right coil mold bases 105 and connected to the transformer 106 via a busbar 102. The air jet device sprays air from the top, bottom, and sides of the rail. During operation, the coil opening / closing cylinder 103 completely closes the two coils to form a circuit, achieving induction heating normalizing.

[0034] Transformer 106 is compatible with 1553Hz low frequency and 2215Hz high frequency.

[0035] The air jet device includes four air jet boxes, which are arranged sequentially on both sides of the rail top, rail bottom, and rail web. Each air jet box is connected to two air pipes and connected to the main air line through a ball valve.

[0036] The normalizing head assembly 100 also includes a temperature display instrument 107, a straight-through baffle-type flow switch 108, a left-right lateral movement nut assembly 109, and a first proximity switch 110. The straight-through baffle-type flow switch 108 is installed in the water path. When water reaches a certain flow rate, the flow switch outputs a signal to the programmable controller (PLC) to determine if the water path is flowing normally. The left-right lateral movement nut assembly 109 is installed at the bottom of the normalizing head assembly, forming a ball screw mechanism with the left and right lead screws 206 to realize the left and right movement of the normalizing head assembly on the head mounting base assembly 200. The first proximity switch 110 is fixedly installed on a side parallel to the coil. When the coil opens, the first proximity switch 110 detects the coil approaching and sends the signal to the PLC for safety interlock control. The temperature display instrument 107 corresponds to the probe of a temperature sensor 101.

[0037] The control cabinet 500 includes an electrical control cabinet and a normalizing power supply control cabinet, which are fixed on both sides of the hydraulic pump station 600 respectively. The electrical control cabinet is equipped with a programmable logic controller (PLC) and its related electrical equipment components to realize the action control of the equipment and the information processing of digital / analog signals. The programmable logic controller transmits data to the ERP data collaborative management system. The normalizing power supply control cabinet is equipped with a normalizing power supply, contactor, water-cooled capacitor and other accessories to provide working current for the induction normalizing coil 104.

[0038] The mobile trolley 400 includes a trolley frame, on which limit switches, a drive motor, master and slave wheel axle assemblies, and a pull rope sensor are installed. The mobile trolley 400 is mainly used to support other equipment components. The pull rope sensor enables precise control of the trolley's movement, and works in conjunction with the laser displacement sensor on the normalizing head to achieve automatic positioning of the weld seam.

[0039] The head mounting base assembly 200 mainly includes a head mounting bracket 207, on which a drag chain 203, left and right lead screws 206, a linear guide rail slider assembly 204, auxiliary support rollers 202, and a rail anti-deviation guide plate 201 are mounted. The upper ends of both ends of the head mounting bracket 207 are fitted with rail anti-deviation guide plates 201, which are connected to the auxiliary support rollers 202. Linear guide rail slider assemblies 204 are mounted on both sides of the head mounting bracket 207, and a second proximity switch 205 is located below each linear guide rail slider assembly 204. The drag chain 203 is mounted at the bottom of the head mounting bracket 207. The left and right lead screws 206 are fixedly mounted inside the head mounting bracket 207, and together with the lead screw nut 109, they enable the movement of the head assembly. The machine head mounting base assembly 200 is mainly used to support the normalizing machine head assembly 100 and provide it with reciprocating sliding function. After normalizing is completed, the air spray device on the normalizing machine head assembly 100 is moved to the rail weld bead for air spray cooling through the linear guide slider assembly 204, without the need to control the moving trolley 400.

[0040] The rail guide support device 300 includes a guide support fixing bracket 307, on which a rail bottom roller assembly 303, a side guide roller 302, and a rail top roller 306 are arranged. A rail top pressing mechanism 301 and an automatic centering clamping mechanism 304 are connected above the rail top roller 306. The automatic centering clamping mechanism 304 is connected to a clamping cylinder 305. When the clamping cylinder 305 extends, it drives the centering clamping mechanism 304 to rotate inward along the rotation center and engages with gears, thereby enabling the centering clamping mechanism to perform the clamping function.

[0041] The rail guide support device 300, through rollers, hydraulic clamping, and a centering clamping mechanism, ensures that both sides of the rail weld bead are on the same horizontal centerline during the normalizing heat treatment process. The centering clamping mechanism mainly uses a hydraulic cylinder to drive two pairs of gears to mesh and achieve contour clamping of the rail web, ensuring the straightness of the rail.

[0042] The main pump station of the hydraulic pump station is fixed on one side of the mobile trolley 400. The hydraulic pump station 600 mainly provides power source for the equipment's actuating mechanism. It drives the hydraulic piston pump through a three-phase asynchronous motor to provide hydraulic oil to the entire hydraulic pump station. The pressure of different pipelines is set and adjusted through the overflow valve and pressure reducing valve to provide the system with two different pressures: high working pressure (14MPa) and low pressure (5MPa), thereby improving the efficiency of the hydraulic pump station 600. It also provides oil pressure for the fixed normalizing equipment, which acts on the centering and clamping of the rails and the pressure holding during normalizing.

[0043] Example 3 like Figures 1-2As shown, a fixed rail normalizing device includes a mobile trolley 400, which carries a hydraulic pump station 600, a control cabinet 500, a rail guide support device 300, and a machine head mounting base assembly 200. The mobile trolley 400's supporting devices or components are all bolted to the trolley surface and move with it. A pull rope sensor is installed at one end of the mobile trolley 400 to achieve precise control of the trolley's movement. This, combined with a laser displacement sensor on the normalizing machine head, enables automatic weld seam positioning. In the automatic weld seam positioning function, when the trolley moves back and forth, the signal changes when the laser displacement sensor scans the weld seam, the data from the pull rope sensor at this stage is recorded, and finally, the trolley travels to the corresponding position.

[0044] like Figure 3 , Figure 4 The diagram shows the structure of the normalizing head assembly 100. The normalizing head assembly 100 mainly consists of a mold base fixing frame, a temperature sensor 101, a busbar 102, a coil opening and closing cylinder 103, a normalizing coil 104, a coil mold base 105, a transformer 106, a linear guide slider, an air jet device, a temperature display instrument 107, a straight-through baffle-type flow switch 108, a left and right lateral nut assembly 109, and a first proximity switch 110. All components are connected into a single unit by screws, nuts, wires, water pipes, and hydraulic oil pipes.

[0045] There are three temperature sensors 101 in total, which detect the temperature of the rail top, rail bottom, and rail after air jetting, respectively, and use this to determine the working state and power of the rail heat treatment. Each probe corresponds to a temperature display instrument 107, so there are a total of three display instruments on the normalizing head assembly 100. The rear end of the transformer 106 is connected to the busbar 102, and is connected to the normalizing coil 104 through the busbar 102. The large current after transformation is directly connected to the coil to realize coil induction heating.

[0046] The straight-through baffle-type flow switch 108 is mainly used to detect the flow and pressure of the system and generate feedback signals to participate in the pressure control of the hydraulic pump station 600. The left and right lateral nut assembly 109 works together with the left and right lead screws 206 in the head mounting base assembly 200 to provide power for the alignment movement of the head coil. A hydraulic cylinder is used as the power source and is connected to the mold base through a mechanism. The extension and retraction of the coil opening and closing cylinder 103 realizes the automatic opening and closing of the normalizing coil 104, and the first proximity switch 110 determines whether the mold base and the coil have been closed. The coil mold base 105 is made of non-magnetic stainless steel, which is high in strength and not easy to rust. It is used to fix the induction coil and protect the coil from deformation. The opening and closing structure of the mold closing can effectively prevent the coil from being damaged when passing through the equipment. The electro-hydraulic automatic control reduces labor intensity and improves production efficiency.

[0047] like Figure 5As shown, the machine head mounting base assembly 200 mainly consists of a machine head mounting bracket 207, a cable chain 203, a linear guide rail slider assembly 204, left and right lead screws 206, a second proximity switch 205, a telescopic lead screw protective cover, auxiliary support rollers 202, and a rail anti-deviation guide plate 201. The rail anti-deviation guide plate 201 and the auxiliary support rollers 202 are installed at both ends of the machine head mounting bracket 207 for guiding and conveying the rails; the linear guide rail slider assembly 204 needs to cooperate with the linear guide rail slider in the normalizing machine head assembly 100 to realize the movement of the machine head; the cable chain 203 wraps around the cables and pipes connected to the normalizing machine head to prevent the cables or pipes from interfering with or even breaking with other components when the machine head moves.

[0048] like Figures 6-7 As shown, the rail guide support device 300 consists of a guide support fixing bracket 307, a rail bottom roller assembly 303, a side guide roller 302, a rail top roller 306, a rail top pressing mechanism 301, an automatic centering clamping mechanism 304, and a clamping cylinder 305. The height of the rollers in the rail base roller assembly 303 must be consistent with the height of the rollers on the roller conveyor. The guide frame serves as the initial guide during the rail conveying process, enabling automatic clamping and centering of both ends of the rail to prevent the rail from directly impacting the ends of the equipment. The side guide roller 302 mainly consists of a side wheel guide frame, a side guide wheel shaft, a side guide wheel, bearings, and bearing caps, guiding the rail web to prevent the rail from tilting. The rail top roller 306 mainly consists of a rail top roller bracket, a rail top guide roller shaft, a bearing sleeve, bearings, and bearing end caps, limiting the rail top to prevent damage to the rail top clamping mechanism 301. The rail top clamping mechanism 301 consists of a clamping cylinder, a rail top clamping head, a rail top clamping head wear-resistant block, and a rail top clamping head detection ring, preventing the rail from shifting or tipping over during the grinding process after clamping. The automatic centering and clamping mechanism 304 mainly consists of a mounting base, clamping gear, clamping mechanism gear shaft, copper sleeve, nut, clamping wear-resistant block, proximity switch and other components. The automatic centering and clamping mechanism 304 adopts a V-type clamping and locking mechanism. After the rail enters the equipment, the two sides of the rail bottom of the centering mechanism fix and clamp the rail to ensure that the workpiece is always in the center position of the coil during the normalizing process. The clamping cylinder 305 moves horizontally to ensure that the clamping force is not affected by the wear of the wear-resistant block.

[0049] like Figure 8 The diagram shows the air-jetting device, which uses four air-jetting boxes to spray air from the top, bottom, and sides of the rail. Each air-jetting box is connected to two air pipes and then to the main air line via ball valves. The ball valves can be closed according to different process requirements, thereby changing the air-jetting cooling method after normalizing heat treatment and adapting to different types of rails and process requirements.

[0050] like Figure 9 The image shows the human-machine interface of the normalizing equipment. It can record the temperature of the rail top and bottom in real time during the normalizing and air-blasting stages, generate temperature curves, and record the corresponding process parameters after completion, which is convenient for process comparison and management.

[0051] Example 4 Based on Examples 1-3, the steps of the fixed rail normalizing method are as follows: Step 1: Check whether the mold base coil, automatic centering clamping mechanism 304 and rail top pressing mechanism 301 of the fixed rail normalizing equipment are in the open state to avoid interference and collision with the rail. Step 2: After the roller conveyor moves the rail welding head to the center of the fixed normalizing station, the roller conveyor is locked. Step 3: Click on automatic weld seam positioning, and the moving trolley 400 will automatically move to the point where the mold base coil and the rail weld seam roughly coincide; Step 4: Check if the rail position is correct. Align the weld seam with the fine-tuning coil using the lead screw slider, and rotate the corresponding knob to fix the rail with the centering clamping mechanism and the pressing mechanism. Step 5: The mold base coil closes, switch to automatic mode, press and hold the normalizing start button, the normalizing equipment starts, and performs dual-frequency normalizing on the rail joint, automatically switching between low frequency and high frequency (automatically setting the phase change temperature); Step 6: After normalizing, the mold base coil automatically opens, the clamping and pressing device is released, and the normalizing head assembly 100 automatically moves to the air spray position to cool the weld seam with air spray (if no air spray is selected, the head assembly 100 will not move). Step 7: Cool to the set temperature, stop the airflow, and the coil servo shaft will automatically return to the origin.

[0052] Step 8: Enable the roller conveyor line and the rails move to the next station.

[0053] The spacing between the coil and the rail is fixed, ensuring repeatable positioning accuracy when opening and closing the coil (the spacing between the rail top, rail web, rail bottom and the coil are all relatively fixed dimensions). The entire normalizing process is automated. Power parameters, frequency switching temperature, stop temperature, and air jet stop temperature during the dual-frequency normalizing stage can all be set through the human-machine interface. The normalizing operation uses pressure-holding clamping normalizing. During induction normalizing, due to the constraint of the rail-locking device, the welded joint of the rail is less likely to deform or be damaged under the temperature stress of the rail, thereby improving the quality of the weld joint.

Claims

1. A fixed rail normalizing device, comprising a mobile trolley (400), characterized in that: The mobile trolley (400) is equipped with a hydraulic pump station (600), a control cabinet (500), a machine head mounting base assembly (200), and a rail guide support device (300). The machine head mounting base assembly (200) is equipped with a normalizing machine head assembly (100). The normalizing head assembly (100) includes a temperature sensor (101), a laser displacement sensor, a normalizing coil (104), a coil mold base (105), a transformer (106), and an air spray device. The coil opening and closing cylinder (103) is hinged to the coil mold base (105). The normalizing coil (104) includes a left coil and a right coil. The left coil and the right coil are respectively installed on the left and right coil mold bases (105) and are both connected to the transformer (106) through a busbar (102). The air spray device sprays air from the top of the rail, the bottom of the rail, and the sides of the rail.

2. The fixed rail normalizing equipment according to claim 1, characterized in that: The transformer (106) is adapted to 1553Hz low frequency and 2215Hz high frequency.

3. A fixed rail normalizing device according to claim 1, characterized in that: The air jet device includes four air jet boxes, which are arranged sequentially on both sides of the rail top, rail bottom, and rail waist. Each air jet box is connected to two air pipes and connected to the main air line through a ball valve.

4. A fixed rail normalizing device according to claim 1, characterized in that: The normalizer head assembly (100) also includes a temperature display instrument (107), a straight-through baffle flow switch (108), a left and right lateral nut assembly (109), and a first proximity switch (110). The straight-through baffle flow switch (108) is installed in the water circuit, the left and right lateral nut assembly (109) is installed at the bottom of the normalizer head assembly (100), and the first proximity switch (110) is fixedly installed on one side parallel to the coil. One temperature display instrument (107) corresponds to the probe of one temperature sensor (101).

5. A fixed rail normalizing device according to claim 1, characterized in that: The control cabinet (500) includes an electrical control cabinet (500) and a normalizing power supply control cabinet (500), which are fixed on both sides of the hydraulic pump station (600). The electrical control cabinet (500) is equipped with an editable controller PLC, which transmits data to the ERP data collaborative management system. The normalizing power supply control cabinet (500) is equipped with a normalizing power supply, a contactor, and a water-cooled capacitor.

6. A fixed rail normalizing device according to claim 1, characterized in that: The mobile trolley (400) includes a trolley frame, on which limit switches, drive motors, master and slave wheel axle assemblies and pull rope sensors are provided. The mobile trolley (400) is used to carry the remaining equipment components.

7. A fixed rail normalizing device according to claim 1, characterized in that: The machine head mounting base assembly (200) includes a machine head mounting bracket (207), on which a drag chain (203), left and right lead screws (206), a linear guide rail slider assembly (204), an auxiliary support roller (202), and a rail anti-deviation guide plate (201) are mounted. The upper part of both ends of the machine head mounting bracket (207) is equipped with a rail anti-deviation guide plate (201), which is connected to the auxiliary support roller (202). The two sides of the machine head mounting bracket (207) are equipped with linear guide rail slider assemblies (204), and a second proximity switch (205) is provided below the linear guide rail slider assembly (204). The drag chain (203) is installed at the bottom of the machine head mounting bracket (207). The left and right lead screws (206) are fixedly installed inside the machine head mounting bracket (207).

8. A fixed rail normalizing device according to claim 1, characterized in that: The rail guide support device (300) includes a guide support fixing bracket (307), on which a rail bottom roller assembly (303), a side guide roller (302) and a rail top roller (306) are provided. A rail top pressing mechanism (301) and an automatic centering clamping mechanism (304) are connected above the rail top roller (306). The automatic centering clamping mechanism (304) is connected to a clamping cylinder (305).

9. A fixed rail normalizing device according to claim 1, characterized in that: The main pump station of the hydraulic pump station (600) is fixed on one side of the mobile trolley (400). The hydraulic pump station (600) provides a power source for the equipment's operating mechanism. It drives a hydraulic piston pump through a three-phase asynchronous motor to provide hydraulic oil to the entire hydraulic pump station (600). It also sets and adjusts the pressure of different pipelines through relief valves and pressure reducing valves, providing the system with both high-pressure and low-pressure operating conditions.

10. A method for normalizing fixed rails, comprising the following steps: Step 1: Check whether the normalizing coil (104), automatic centering clamping mechanism (304) and rail top clamping mechanism (301) of the fixed rail normalizing equipment are in the open state; Step 2: After the roller conveyor moves the rail welding head to the center of the fixed normalizing station, the roller conveyor is locked. Step 3: Click on automatic weld seam positioning, and the moving trolley (400) will automatically move to the point where the mold base coil and the rail weld seam coincide; Step 4: Check if the rail position is correct. Align the weld seam with the fine-tuning coil using the lead screw slider, and rotate the corresponding knob to fix the rail with the centering clamping mechanism and the pressing mechanism. Step 5: The normalizing coil (104) is closed, switch to automatic mode, press and hold the normalizing start button, the normalizing equipment starts, and the rail joint is subjected to dual-frequency normalizing. The low frequency and high frequency are automatically converted according to the automatically set phase change temperature. Step 6: After the normalizing is completed, the normalizing coil (104) automatically opens, the clamping and pressing device is released, and the normalizing head assembly (100) automatically moves to the air spray position to cool the weld with air spray. Step 7: Cool to the set temperature, stop the airflow, and the coil servo shaft will automatically return to the origin; Step 8: Enable the roller conveyor line and the rails move to the next station.

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