Welding method for embedded stud of air rail power supply support

Abstract

The invention belongs to the technical field of steel structure construction, and particularly relates to a welding method for an air rail power supply support embedded stud. Comprising the following steps of: welding a top plate, a web plate and a top plate side external stiffening rib into a groove shape according to a pre-arch line type on an assembly jig frame by adopting an upside-down method and taking one side of a track beam box body as a reference end; the constraint of the assembly jig frame is relieved, the assembly jig frame is turned over, the web plate on the embedded stud side is placed at the horizontal position, and a positioning size line is marked; manufacturing an internal thread sleeve, and preparing a protective ceramic ring; the embedded stud is in threaded connection with the internal thread sleeve, the outer side of the embedded stud is sleeved with a protection ceramic ring, and welding is conducted according to the positioning dimension line and the welding process parameters; welding sundries are cleaned after welding, and appearance inspection is carried out; and the track beam box body is turned over, a notch faces upwards, and other plates are installed and welded. According to the method, the track beam box body is assembled through an upside-down mounting method, the welding points are accurately positioned, the welding process parameters and the quality detection process are optimized, and the technical problems that welding operation is difficult and the quality is unstable in a narrow space are solved.

Description

Technical Field

[0001] This invention belongs to the field of steel structure construction technology, specifically a welding method for pre-embedded studs in an air rail power supply support. Background Technology

[0002] As a new mode of transportation developed on the basis of mature transportation technology, Skyrail technology effectively makes up for the shortcomings of existing urban transportation capacity and provides great convenience for residents' travel with its advantages such as small footprint, high resource utilization rate and good environmental performance.

[0003] In the manufacturing process of the track beam box body for the monorail project, the relatively narrow internal space (typically 780mm × 1100mm) and the need to pre-weld studs with a spacing of 40mm / 49mm / 120mm (used to fix the insulating supports of the built-in power supply rail) on the inner web plate significantly complicate the welding operation and subsequent weld grinding. Particularly during the welding of the pre-embedded studs, the space constraints make welding gun operation inconvenient, welding parameters difficult to control precisely, and welding defects are easily generated. Furthermore, the lack of effective methods for positioning pre-embedded studs and welding quality control in existing technologies makes it difficult to guarantee the welding position accuracy and quality of the pre-embedded studs, posing a potential threat to the reliability of the final product. In addition, controlling the heat-affected zone, preventing welding deformation, and real-time monitoring of welding quality are all challenging when performing multiple welding processes in a confined space. Summary of the Invention

[0004] To address the problems mentioned above, this invention provides a welding method for pre-embedded studs in the overhead rail power supply support. By appropriately adjusting the welding sequence of the track beam box and using a self-made internal threaded sleeve clamping device, the design quality requirements are ultimately met.

[0005] The present invention adopts the following technical solution:

[0006] A welding method for pre-embedded studs in an overhead rail power supply support, the welding method comprising the following steps:

[0007] S1. Track beam box body manufacturing: The inverted assembly method is adopted on the assembly jig, and the top plate, web plate and external stiffening ribs on the side of the track beam box body are welded into a groove shape according to the pre-arched line shape, with one side of the track beam box body as the reference end.

[0008] S2. Determine the positioning dimension line: Release the restraints of the assembly jig and turn it over so that the web plate on the side of the pre-embedded stud is in a horizontal position, and mark the positioning dimension line of the stud;

[0009] S3. Preparations before welding the embedded stud: Make an internal threaded sleeve that matches the embedded stud, connect it to the chuck of the welding gun, and prepare the protective ceramic ring for welding.

[0010] S4. Welding of embedded studs: Screw the embedded studs to the internal threaded sleeve, and at the same time, install a protective ceramic ring on the outside of the embedded studs. Then, according to the positioning dimension line, weld according to the corresponding welding process parameters.

[0011] S5. After each embedded stud is welded, clean up the welding debris and visually inspect the welding quality of the embedded stud until all embedded studs are welded.

[0012] S6. Turn the track beam box over with the slot facing upward, assemble the bottom plate, the outer stiffening ribs on the web side, and the longitudinal ribs of the bottom plate, and complete the welding of the relevant welds.

[0013] Furthermore, step S3 also includes cleaning the harmful substances in the area to be welded at the positioning point of the pre-embedded stud welding point, inspecting the appearance of the pre-embedded stud, and discarding pre-embedded studs that do not meet the appearance requirements.

[0014] Furthermore, in step S4, before the formal welding, at least two pre-embedded studs are test welded according to the specified process parameters. After welding, appearance and 15° angle bending tests are performed. If they pass the tests, the formal welding is carried out. If they fail, the welding process parameters are adjusted and the test welding is repeated until the welding passes the tests before the formal welding is carried out.

[0015] Furthermore, in step S4, the welding of the pre-embedded stud is carried out in a flat position, and the welding gun is not allowed to be moved before the weld is completely solidified; after the weld cools down, it is tapped to the protective ceramic ring, and after the welding is completed, a uniform weld bead is extruded at the bottom corner of the pre-embedded stud at 360°.

[0016] Furthermore, in step S5, the welded embedded studs are visually inspected, and those that do not meet the appearance requirements are ground and repaired; the unqualified embedded studs are removed, and the removed parts are ground smooth. The embedded studs are then re-welded according to step S4, and the welding quality is checked.

[0017] Furthermore, in step S3, the protective ceramic ring is of type RF12. Before welding, the protective ceramic ring needs to be baked at 100~150℃. Before use, the integrity of the protective ceramic ring must be checked and it must not be damaged.

[0018] Furthermore, in step S4, after the pre-embedded stud is screwed to the internal threaded sleeve, the length of the pre-embedded stud extending out of the protective ceramic ring is 2.0~3.0mm.

[0019] Furthermore, in step S4, the welding of the pre-embedded studs gradually extends from the center to both sides along the length of the track beam box, and the grounding wire is symmetrical to the pre-embedded studs being welded.

[0020] Furthermore, the pre-embedded stud is M12×50, and the internal threaded sleeve is φ22×60mm×M12; the welding parameters for the pre-embedded stud are: lifting height of 2.0~2.5mm, welding time of 0.5s, and welding current of 510~530A.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This application provides a welding method for pre-embedded studs in an overhead rail power supply support. By assembling the track beam box body using an inverted method, accurately positioning the welding points, and optimizing welding process parameters and quality inspection procedures, it solves the technical problems of difficult welding operations and unstable quality in confined spaces. It has the advantages of improving welding accuracy, ensuring welding quality stability, and improving construction efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a partially enlarged schematic diagram of an application scenario for a pre-embedded stud provided in an embodiment of this application;

[0025] Figure 2 A cross-sectional view of a track beam box body provided in one embodiment of this application;

[0026] Figure 3 for Figure 2 Enlarged view of part A in the image;

[0027] Figure 4 This is a schematic diagram of a stud welding torch provided in one embodiment of this application;

[0028] Wherein: 1-top plate, 2-top plate side stiffening rib, 3-web plate, 4-web plate side stiffening rib, 5-bottom plate, 6-bottom plate longitudinal rib, 7-embedded stud, 8-internal threaded sleeve, 9-protective ceramic ring, 10-welding torch, 11-clamp. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0030] The following is in conjunction with the appendix Figure 1 To be continued Figure 4 The invention is described in detail with specific embodiments.

[0031] In existing technologies, monorail technology has significant advantages as a new mode of transportation. However, during the manufacturing process of the track beam box, the narrow internal space and dense arrangement of embedded studs make traditional welding methods difficult. To address this, this application proposes a welding method for embedded studs in monorail power supply supports. This method optimizes the welding work surface by adjusting the structure and designs special auxiliary tools to improve welding accuracy. Figure 1 The diagram shows a partial enlarged view of the application scenario of the embedded stud. As can be seen from the diagram, the space for the embedded stud 7 is narrow, and the requirements for the weld formation of the embedded stud 7 are relatively high.

[0032] See Figures 1 to 4 The welding method includes the following steps:

[0033] S1. Track beam box body manufacturing: The inverted assembly method is adopted on the assembly jig, and the top plate 1, web plate 3, and top plate side stiffening rib 2 are welded into a groove shape according to the pre-arched line shape, with one side of the track beam box body as the reference end.

[0034] S2. Determine the positioning dimension line: Release the restraints of the assembly jig and turn it over so that the web plate 3 on the side of the embedded stud is in a horizontal position, and draw the positioning dimension line of the stud; it should be noted that when drawing the positioning dimension line of the stud, the influence of the shrinkage of the box welding and correction on the positioning dimension of the embedded stud should be considered.

[0035] S3. Preparations before welding the embedded stud: Make an internal threaded sleeve 8 that is compatible with the embedded stud 7 to serve as a clamping device for the embedded stud 7, and connect it to the chuck 11 of the welding gun. At the same time, prepare several protective ceramic rings 9 for welding. It can be seen that the length of the embedded bolt 7 used in the welding method of this application is relatively small, usually about 50mm. The clamping length of the welding gun 10 is insufficient. By making the internal threaded sleeve 8, the chuck 11 of the welding gun 10 can indirectly clamp the embedded stud 7 through the internal threaded sleeve 8.

[0036] S4. Welding of pre-embedded studs: Screw the pre-embedded studs 7 to the internal threaded sleeves 8, and at the same time, install protective ceramic rings 9 on the outside of the pre-embedded studs 7. Then, according to the positioning dimension lines, weld according to the corresponding welding process parameters.

[0037] S5. After each embedded stud 7 is welded, clean up the welding debris and visually inspect the welding quality of the embedded stud. For embedded studs that do not meet the quality requirements, remove them as required and re-weld them until all embedded studs are welded.

[0038] S6. Turn the track beam box over with the slot facing upward, assemble the bottom plate 5, the side stiffening ribs 4 of the web plate, and the longitudinal ribs 6 of the bottom plate, and complete the welding of the relevant welds.

[0039] In the above scheme, the inverted assembly method refers to prioritizing the welding of the top plate 1 and the web plate 3 to form a reference structure, ensuring the stability of the reference for subsequent welding; the internal threaded sleeve 8 is a connecting component that is threadedly matched with the pre-embedded stud 7. The chuck 11 of the welding torch 10 clamps and fixes the internal threaded sleeve 8, and the welding torch 10 and the pre-embedded stud 7 are quickly positioned by screwing the internal threaded sleeve 8 to the pre-embedded stud 7, eliminating manual alignment errors; the protective ceramic ring 9 is an annular protective device sleeved on the outside of the pre-embedded stud 7, which isolates air and prevents oxidation during the welding process. Specifically, after the track beam box body forms a groove structure through the inverted assembly method, the web plate 3 is adjusted to a horizontal position and a positioning line is drawn to provide a precise reference for the dense arrangement of pre-embedded studs 7; the welding torch 10 clamps the pre-embedded studs 7 through the internal threaded sleeve 8, and together with the protective ceramic ring 9, forms a closed welding environment. During welding, the work is carried out sequentially according to the positioning dimension line. After the welding of each pre-embedded stud 7 is completed, the slag is immediately cleaned and the weld appearance is checked to avoid the accumulation of defects. The final assembly stage combines the pre-embedded studs and other components such as the housing and base plate, achieving process separation.

[0040] This application utilizes a phased construction approach to advance the welding of pre-embedded studs to the open state of the track beam box girder. Combined with structural overturning to optimize the work surface, it achieves precise mechanical connection through an internally threaded sleeve 8, and enhances weld quality with a protective ceramic ring 9, ensuring a stable and controllable welding process and reducing quality fluctuations caused by human factors. This effectively solves the construction challenge of dense stud welding in confined spaces. Furthermore, this welding method can utilize existing factory equipment, reducing manufacturing costs, increasing production efficiency, and offering strong technical versatility. While ensuring production quality, it meets relevant design requirements, thereby satisfying the workshop's production needs.

[0041] Furthermore, step S3 also includes cleaning the area within the welding zone of the pre-embedded stud 7 to remove harmful substances, and inspecting the appearance of the pre-embedded stud 7, discarding any that fail to meet the appearance requirements. Harmful substances within the welding zone typically refer to oil, moisture, primer, rust, scale, etc., which can be removed by mechanical grinding to prevent the formation of porosity or cracks during welding. The visual inspection of the pre-embedded stud 7 involves visually inspecting or measuring for rust, thread damage, or structural deformation on the stud surface. Specifically, a magnifying glass and calipers can be used for dimensional measurement. Defective parts are then removed to prevent insufficient welding strength.

[0042] Specifically, before welding, the area to be welded needs to be ground to expose the metallic luster of the substrate surface, eliminating the influence of contaminants on the metallurgical reaction of the molten pool and ensuring an effective bond between the weld and the substrate. Simultaneously, each embedded stud undergoes visual inspection to eliminate studs with surface defects or dimensional deviations, preventing a decrease in the load-bearing capacity of the weld joint due to material defects. This process, by controlling the cleanliness of the substrate and the quality of the materials step by step, eliminates potential causes of welding defects at their source.

[0043] Furthermore, in step S4, before each shift's formal welding, at least two pre-embedded studs 7 must be test-welded according to the specified process parameters. After welding, appearance and 15° angle bending tests are performed. If the tests are passed, formal welding can proceed; if they fail, the welding process parameters are adjusted and test welding is repeated until the welds are qualified before formal welding. Appearance inspection refers to the inspection method of visually inspecting the weld surface formation quality. Specifically, this can be achieved by using a magnifying glass to observe the uniformity of the weld bead, cracks, and porosity, to determine whether the weld appearance quality meets the standards. The 15° angle bending test is a mechanical testing method that involves bending the pre-embedded stud 15 degrees in any direction and observing whether the weld cracks. Specifically, this can be achieved by using a special fixture to clamp the stud root and perform directional bending, to verify whether the weld joint strength meets the load-bearing requirements. Based on the above test welding structure, the welding current, time, and other process conditions are adjusted to ultimately find the optimal welding parameters.

[0044] Specifically, after the web plate 3 of the track beam box is horizontally positioned, the operator first selects two pre-embedded studs 7 in the area to be welded for trial welding. During the welding process, the welding torch 10 is kept stationary until the weld is completely solidified. After cooling, the protective ceramic ring 9 is knocked off. The trial weld sample is then double-checked: the weld bead is observed under a magnifying glass to check if a 360-degree uniform fusion edge is formed, confirming the absence of cracks and slag inclusions; a bending test device is used to apply a 15-degree lateral force to the studs to check for cracking at the weld interface. When both tests are qualified, the current process parameters are deemed suitable for formal welding. If the tests fail, the welding current or time parameters are adjusted according to a gradient, and the trial welding is repeated until a qualified weld is obtained, thus establishing a parameter optimization mechanism.

[0045] Furthermore, in step S4, the welding of the pre-embedded stud 7 is performed in a flat position, and the welding torch is not allowed to be moved before the weld is completely solidified; after the weld cools, it is tapped onto the protective ceramic ring 9. After welding is completed, a uniform weld bead is extruded at the bottom corner of the pre-embedded stud 10 at 360°. The welding machine in this application is a stud welding machine. Directly using existing stud welding methods cannot achieve the welding operation. Therefore, an internal threaded sleeve 8 is self-made as a clamping device for the pre-embedded stud 7.

[0046] Specifically, during the welding process, the welding torch is kept vertical, ensuring that the arc heat input is evenly applied to the mating surface between the embedded stud 7 and the web 3. After the arc is extinguished, the welding torch 10 remains stationary until the molten pool metal completes the solidification process, eliminating welding defects caused by premature movement. After the weld cools to ambient temperature, the protective ceramic ring 9 is completely removed by axial tapping to prevent adhesion between the ceramic ring and the weld at high temperatures. After optimization of the welding parameters, the molten metal forms a continuous and uniform annular weld bead at the bottom corner of the embedded stud 7, covering the entire circumferential area of ​​the connection interface. This solution effectively controls the molten pool morphology and metallurgical process by limiting the welding posture and operation sequence, ensuring the weld bead formation quality and appearance consistency, and achieving stable control of the welding quality of embedded studs in confined spaces.

[0047] Furthermore, in step S5, the welded embedded studs 7 undergo visual inspection. Those that do not meet the appearance requirements are ground and repaired. Defective embedded studs 7 are removed, and the removed areas are ground smooth. The embedded studs are then re-welded according to step S4, and the welding quality is checked. Specifically, after the welding process is completed, a systematic visual inspection process is first used to perform a 360° circumferential inspection on the weld of each embedded stud 7, focusing on the uniformity of the weld bead and the surface finish. For welds with surface irregularities or spatter, immediate local repairs are performed until the weld contour smoothly transitions with the base material. When internal defects are found in the weld, the embedded stud along with the defective weld is removed using a thermal cutting tool. The base material surface is then smoothed to remove residual weld beads and oxide layers. The treated area is re-welded, and the visual inspection process is repeated after cooling, forming a closed-loop quality control mechanism of inspection-treatment-re-inspection. This application enables real-time monitoring and precise processing of the welding quality of each embedded stud, ensuring that the weld appearance meets the standard requirements. At the same time, it completely eliminates internal welding defects through a closed-loop rework process, solving the problems of large fluctuations in welding quality and difficulty in rework in narrow spaces, and significantly improving the connection reliability of embedded studs.

[0048] Furthermore, in step S3, the protective ceramic ring 9 is of type RF12. Before welding, the protective ceramic ring needs to be baked at 100-150℃. Before use, the integrity of the protective ceramic ring must be checked to ensure it is not damaged. It can be understood that the RF12 type protective ceramic ring is a ring-shaped protective device matched with the welding process of the pre-embedded stud. Its inner diameter is adapted to the outer diameter of the pre-embedded stud 7, and the material has high-temperature resistance properties, such as being made of ceramic composite materials, which can stably encapsulate the molten pool area during welding. The protective ceramic ring 9 plays a role in weld formation and compression, while the baking treatment removes any possible moisture and dampness, ensuring the dryness of the protective ceramic ring and preventing porosity during welding. The above-mentioned solution of this application effectively avoids weld porosity defects caused by moisture or damage to the protective ceramic ring 9 during welding, while ensuring the uniformity of the molten pool shape, enabling the formation of a complete and continuous weld leg at the bottom corner of the pre-embedded stud 7, significantly improving the stability of the forming quality of welding operations in narrow spaces.

[0049] Furthermore, in step S4, after the pre-embedded stud 7 is screwed to the internal threaded sleeve 8, the length of the pre-embedded stud 7 extending beyond the protective ceramic ring 8 is 2.0~3.0mm. The extension length refers to the vertical distance by which the end of the pre-embedded stud 7 extends beyond the plane of the protective ceramic ring 8. This parameter directly affects the contact area between the arc action area and the base material. Too short a length will lead to uneven energy distribution in the molten pool, while too long a length will cause arc deviation. In this application, when the extension length is controlled at 2.0~3.0mm, the arc energy is concentrated at the contact interface between the end of the pre-embedded stud and the base material, allowing the metal to melt uniformly within the annular area defined by the protective ceramic ring. The molten metal solidifies synchronously along the circumference under the constraint of the inner wall of the protective ceramic ring 9, forming a continuous and highly consistent weld bead profile. This length range balances the relationship between the arc penetration force and the molten pool constraint force, avoiding both root incomplete fusion due to insufficient energy and weld bead collapse due to an excessively large molten pool.

[0050] Furthermore, in step S4, the welding of the embedded studs 7 proceeds gradually from the center to both sides along the length of the track beam box body, with the grounding conductor symmetrical to the embedded studs 7 being welded. During the welding process, heat is evenly distributed to the entire structure of the track beam box body through a diffusion welding sequence from the center to both sides, avoiding thermal stress concentration caused by continuous welding on one side. At the same time, the symmetrical arrangement of the grounding conductors ensures that the welding current forms a uniform electromagnetic field in the contact area between the stud and the base material, and the molten pool achieves uniform penetration under the action of a stable current.

[0051] Furthermore, the pre-embedded stud 7 is M12×50, and the internally threaded sleeve 8 is φ22×60mm×M12. The welding parameters for the pre-embedded stud 7 are: lifting height of 2.0~2.5mm, welding time of 0.5s, and welding current of 510~530A. The M12×50 pre-embedded stud 7 refers to a threaded fastener with a diameter of 12mm and a length of 50mm. Its length is designed to avoid interference with internal components of the housing while meeting mechanical strength requirements. The φ22×60mm×M12 internally threaded sleeve 8 refers to a connecting component with an outer diameter of 22mm, a length of 60mm, and an M12 internal thread. This size is suitable for the installation space of the welding torch chuck and ensures the stable fixation of the protective ceramic ring. The above welding parameters enable the welding process to be completed in a single operation within a narrow space, reducing the need for post-weld grinding. It should be noted that the lifting height is set to 2.0~2.5mm in this application. On the one hand, this can prevent short circuits during droplet transfer, which would affect the stability of the arc and the quality of the weld. On the other hand, it can control the length of the pre-embedded stud after final welding to meet the design requirements.

[0052] In summary, the welding method for pre-embedded studs of the overhead rail power supply support provided in this application solves the technical problems of difficult welding operations and unstable quality in confined spaces by assembling the track beam box body by inverted assembly, accurately positioning the welding points, optimizing welding process parameters and quality inspection procedures. It has the advantages of improving welding accuracy, ensuring welding quality stability and improving construction efficiency.

[0053] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the nature and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention.

Claims

1. A welding method for pre-embedded studs in an overhead rail power supply support, characterized in that, The welding method includes the following steps: S1. Track beam box body manufacturing: The inverted assembly method is adopted on the assembly jig, and the top plate, web plate and external stiffening ribs on the side of the track beam box body are welded into a groove shape according to the pre-arched line shape, with one side of the track beam box body as the reference end. S2. Determine the positioning dimension line: Release the restraints of the assembly jig and turn it over so that the web plate on the side of the pre-embedded stud is in a horizontal position, and mark the positioning dimension line of the stud; S3. Preparations before welding the embedded stud: Make an internal threaded sleeve that matches the embedded stud, connect it to the chuck of the welding gun, and prepare the protective ceramic ring for welding. S4. Welding of embedded studs: Screw the embedded studs to the internal threaded sleeve, and at the same time, install a protective ceramic ring on the outside of the embedded studs. Then, according to the positioning dimension line, weld according to the corresponding welding process parameters. S5. After each embedded stud is welded, clean up the welding debris and visually inspect the welding quality of the embedded stud until all embedded studs are welded. S6. Turn the track beam box over with the slot facing upward, assemble the bottom plate, the outer stiffening ribs on the web side, and the longitudinal ribs of the bottom plate, and complete the welding of the relevant welds.

2. The welding method for the pre-embedded studs of the overhead rail power supply support according to claim 1, characterized in that, Step S3 also includes cleaning the harmful substances in the welding area of ​​the positioning point at the pre-embedded stud welding point, inspecting the appearance of the pre-embedded stud, and discarding pre-embedded studs that do not meet the appearance requirements.

3. The welding method for the pre-embedded studs of the overhead rail power supply support according to claim 1, characterized in that, In step S4, before the formal welding, at least two pre-embedded studs are test welded according to the specified process parameters. After welding, appearance and 15° angle bending tests are performed. If they pass the tests, the formal welding is carried out. If they fail, the welding process parameters are adjusted and the test welding is repeated until the welding passes the tests before the formal welding is carried out.

4. The welding method for the pre-embedded studs of the overhead rail power supply support according to claim 1, characterized in that, In step S4, the welding of the pre-embedded stud is carried out in a flat position. The welding gun is not allowed to be moved before the weld is completely solidified. After the weld cools down, the protective ceramic ring is knocked down. After the welding is completed, a uniform weld bead is squeezed out at the bottom corner of the pre-embedded stud at 360°.

5. The welding method for the pre-embedded studs of the overhead rail power supply support according to claim 1, characterized in that, In step S5, the welded embedded studs are visually inspected. Those that do not meet the appearance requirements are ground and repaired. The unqualified embedded studs are removed, and the removed parts are ground smooth. The embedded studs are then re-welded according to step S4, and the welding quality is checked.

6. The welding method for the pre-embedded studs of the overhead rail power supply support according to claim 1, characterized in that, In step S3, the protective ceramic ring is of type RF12. Before welding, the protective ceramic ring needs to be baked at 100~150℃. Before use, the integrity of the protective ceramic ring must be checked and it must not be damaged.

7. The welding method for the pre-embedded studs of the overhead rail power supply support according to claim 1, characterized in that, In step S4, after the pre-embedded stud is screwed to the internal threaded sleeve, the length of the pre-embedded stud extending out of the protective ceramic ring is 2.0~3.0mm.

8. The welding method for the pre-embedded studs of the overhead rail power supply support according to claim 1, characterized in that, In step S4, the welding of the embedded studs gradually extends from the center to both sides along the length of the track beam box, and the grounding wire is symmetrical to the embedded studs being welded.

9. The welding method for the pre-embedded studs of the overhead rail power supply support according to claim 1, characterized in that, The embedded stud is M12×50, and the internal thread sleeve is φ22×60mm×M12; the welding parameters for the embedded stud are: lifting height of 2.0~2.5mm, welding time of 0.5s, and welding current of 510~530A.

Images