A subway chassis frame side beam centering clamp and operation process

Abstract

The application discloses a subway underframe frame side beam centering clamp and operation process, which comprises a base support plate, bolt fastening grooves are arranged in the two ends of the two sides of the top end of the base support plate, a mounting vertical plate is arranged in the middle of the top end of the base support plate, a reinforcing assembly is arranged at the bottom end of the two sides of the mounting vertical plate, a transverse adjusting hole is arranged in one side of the top of the mounting vertical plate, an adjusting mechanism is arranged in the transverse adjusting hole, and a supporting mechanism is arranged on one side of the adjusting mechanism. The application fully considers the underframe side beam centering assembly characteristics of the full-welded aluminum alloy underframe frame, can realize the rapid centering adjustment assembly of the underframe frame profile, has the advantages of good reliability, convenient use, easy disassembly, can satisfy various subway model underframe frame high-efficiency and low-cost assembly tooling, and improves the process quality of the underframe side beam centering assembly of the full-welded aluminum alloy subway underframe frame.

Description

Technical Field

[0001] This invention relates to the field of subway underframe processing technology, and more specifically, to a subway underframe side beam centering fixture and its operating process. Background Technology

[0002] The subway underframe is a crucial component of subway vehicles, bearing the weight of the car body and passengers and providing stable support and structure. The underframe side beams are among the key components, requiring precise alignment during manufacturing to ensure the underframe's stability and safety. However, due to the complex and diverse dimensions and shapes of the underframe side beams, certain tolerances exist during processing and assembly. These tolerances can lead to deviations in the side beam alignment, affecting the overall structure and performance of the underframe. To address this issue, the use of fixtures has become more widespread in the assembly and production of modern aluminum alloy subway underframes. During the assembly and welding of workpieces and components, the accuracy and controllability of the fixtures directly affect the precision and quality of the workpieces. Alignment fixtures have emerged as a result. These specially designed fixtures ensure the accurate alignment of the subway side beams during manufacturing. They typically employ components such as locating pins, clamping blocks, and support frames. Through precise positioning and adjustment, the side beams are fixed to the fixture, ensuring accurate alignment during assembly.

[0003] For example, Chinese Patent 202210441732.9 discloses a hydraulic support shield beam assembly clamping and assembly device and method. This device includes a limiting clamp component and a clamping and flipping component. The limiting clamp component includes a positioning lifting component, a first clamping component, and a second clamping component. It solves the problem that during hoisting, the shield beam assembly is easily damaged by impacts, affecting its appearance. However, the above-mentioned hydraulic support shield beam assembly clamping and assembly device has the following shortcomings in practical applications: First, the device uses multiple hydraulic supports. In order to properly clamp the workpiece, it often needs to be used in conjunction with a special clamping component for the workpiece, a hydraulic cylinder, and an electric telescopic cylinder. This means that traditional clamps cannot meet the clamping requirements of workpieces of different sizes and shapes. Furthermore, due to the tolerance issues in the machining of subway underframe side beams, the original end positioning can also lead to centering deviations, making the clamps unusable and increasing production costs.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0005] To address the problems in related technologies, this invention proposes a centering fixture for the side beams of a subway underframe, which has the advantages of enabling rapid assembly and adjustment of underframe profiles and improving the centering process quality of the side beams of the underframe. This solves the problem in existing technologies that it is difficult to meet the clamping requirements of workpieces of different sizes and shapes and that the fixture cannot be reused.

[0006] Therefore, the specific technical solution adopted by the present invention is as follows: According to one aspect of the present invention, a centering clamp for the side beam of a subway underframe is provided. The centering clamp for the side beam of the subway underframe includes a base support plate. Bolt fastening grooves are provided through both ends of the top two sides of the base support plate. An installation plate is provided in the middle of the top of the base support plate. Reinforcing components are provided at the bottom ends of both sides of the installation plate. A transverse adjustment hole is provided through one side of the top of the installation plate. An adjustment mechanism is provided in the transverse adjustment hole. A support mechanism is provided on one side of the adjustment mechanism.

[0007] Furthermore, to achieve lateral jacking movement relative to the end of the underframe side beam, aligning the underframe side beam with the centerline of the subway car body as required by the project, and increasing the versatility of the device, the reinforcement components include a first support reinforcement rib symmetrically arranged at the bottom end of one side of the mounting plate, and a second support reinforcement rib symmetrically arranged at the bottom end of the other side of the mounting plate; the height of the lateral adjustment hole is equal to the welding height of the underframe of the all-welded aluminum alloy production platform, and the width of the lateral adjustment hole is equal to the welding width of the underframe side beam of the subway car model in the all-welded aluminum alloy production platform. The adjustment mechanism includes an installation component on one side of the lateral adjustment hole and a fixing component on the other side of the lateral adjustment hole that cooperates with the installation component. The installation component includes a jack support base plate on one side of the lateral adjustment hole. The jack support base plate has symmetrically opened installation holes in the middle of one side of the jack support base plate, and fastening bolts are installed in the installation holes. The fixing component includes a connecting fastening plate on the other side of the lateral adjustment hole. The connecting fastening plate has symmetrically opened fastening holes in the middle of one side of the connecting fastening plate that cooperate with the fastening bolts. One end of the fastening bolt is provided with a fastening nut that cooperates with the fastening hole.

[0008] Furthermore, to ensure the side beam remains stable during clamping and does not shift, achieving precise positioning and leveling of the side beam, the support mechanism includes a U-shaped jack support seat located on one side of the adjustment mechanism. Both sides of one end of the U-shaped jack support seat are equipped with support seat reinforcement plates that cooperate with the installation components. A radial compensation component is located at the top of the other end of the U-shaped jack support seat. The height of the U-shaped jack support seat is equal to the welding height of the subway car's underframe assembly in the all-welded aluminum alloy production platform. The radial compensation component includes a U-shaped compensation support located at the top of one end of the U-shaped jack support seat. Symmetrically arranged at both ends of the U-shaped compensation support seat are first columnar supports that cooperate with the U-shaped jack support seat, and at the bottom of the U-shaped compensation support seat is a second columnar support that cooperates with the U-shaped jack support seat.

[0009] According to another aspect of the present invention, an operating process for a centering clamp for the side beams of a subway underframe is also provided, the operating process comprising the following steps: S1. Fix the invention to the east end of the base frame assembly welding jig by the cooperation of the bolt fastening groove and the bolt, place the jack horizontally to the top of the U-shaped jack support seat, and then use the overhead crane to lift the base frame side beam and lower the base frame side beam to the top of the base frame assembly welding jig. S2. The lateral position of the support mechanism is adjusted by the adjustment mechanism to adapt the support mechanism to the lateral cross-sectional dimensions of the side beams of the chassis of different vehicle models. S3. After the lateral adjustment is completed, if the side beam of the base frame is biased to the east in the longitudinal direction, the jacks are finely adjusted in the longitudinal direction using the U-shaped jack support and radial compensation components until the center point of the side beam of the base frame corresponds to the tooling center of the base frame. If the side beam of the base frame is biased to the west in the longitudinal direction, the center of the side beam of the base frame is biased to the east in the longitudinal direction by manually striking the west end of the side beam of the base frame. Then, the jacks are finely adjusted in the longitudinal direction using the U-shaped jack support and radial compensation components until the center point of the side beam of the base frame corresponds to the tooling center of the base frame. S4. After the end of the base frame side beam is adjusted to meet the process requirements, the base frame side beam at the top of the base frame assembly welding jig is welded and fixed.

[0010] The beneficial effects of this invention are as follows: (1) This invention fully considers the centering and assembly characteristics of the base frame side beams of the all-welded aluminum alloy base frame, which can realize the rapid centering and adjustment assembly of the base frame profiles, ensuring the centering of the base frame side beams and meeting the process requirements of the sleeper beams in the base frame; the difference is that before the use of this invention, when the subway base frame side beams were hoisted onto the base frame assembly jig, centering required operators at both ends of the base frame side beams, and one operator at the center line position in the middle to check the centering situation. At the same time, the operators at both ends needed to hold large wooden mallets and follow the instructions of the operator in the middle to hammer the ends of the base frame side beams in different directions to achieve the centering of the base frame side beams; after using this invention, the operators can quickly perform the assembly and adjustment of the base frame profiles, ensuring the operability and convenience of the operators during operation, improving the work efficiency of the operators, and greatly improving the process quality of the base frame side beam centering, which can effectively avoid the assembly quality problems of the base frame centering.

[0011] (2) By setting an adjustment mechanism, the present invention can adapt to the difference in the width direction of the aluminum alloy thick-walled profile of the subway underframe side beam in different projects. By manually adjusting the screw on the jack base, the jack can make a lateral support movement relative to the end of the underframe side beam, so that the underframe side beam is aligned with the position of the center line of the underframe frame car body required by the subway project. At the same time, by adjusting the installation components and fixing components, the clamp can adapt to the change in the lateral width of the underframe side beam in different projects, increasing the versatility of the device.

[0012] (3) By setting up a support mechanism, a stable support force can be continuously provided to ensure that the side beam remains stable during the clamping process and does not shift, thereby achieving precise positioning and leveling of the side beam. At the same time, the radial compensation component can adjust the height difference of the Y-axis direction of the side beam of the base frame, so that the fixture can be repeatedly used for processing subway base frame side beams with different tolerances. In addition, the U-shaped jack support seat can ensure that the jack will not roll when it is laid down, thereby effectively limiting the 5-ton jack laid down and ensuring the stability of the clamping process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments 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.

[0014] Figure 1 This is a schematic diagram of the structure of a subway underframe side beam centering clamp according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of a subway underframe side beam centering clamp from another angle according to an embodiment of the present invention; Figure 3 This is a structural schematic diagram of a subway underframe side beam centering clamp from another angle according to an embodiment of the present invention; Figure 4 yes Figure 1 A magnified view of a section at point A in the middle; Figure 5 yes Figure 1 A magnified view of a section at point B in the middle; Figure 6 This is a flowchart comparing the operation process of a subway underframe side beam centering clamp according to an embodiment of the present invention with that of existing technology.

[0015] In the picture: 1. Foundation support plate; 2. Bolt fastening groove; 3. Mounting plate; 4. Reinforcing components; 401. First support reinforcing rib plate; 402. Second support reinforcing rib plate; 5. Lateral adjustment hole; 6. Adjustment mechanism; 601. Mounting components; 6011. Jack support base plate; 6012. Mounting hole; 6013. Fastening bolt; 602. Fixing components; 6021. Fastening plate; 6022. Fastening hole; 6023. Fastening nut; 7. Support mechanism; 701. U-shaped jack support seat; 702. Support seat reinforcing plate; 703. Radial compensation components; 7031. U-shaped compensation support; 7032. First column support; 7033. Second column support. Detailed Implementation

[0016] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0017] According to an embodiment of the present invention, a centering fixture for the side beams of a subway underframe and an operating process are provided.

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-5 As shown, the subway underframe side beam centering clamp according to an embodiment of the present invention includes a foundation support plate 1. Bolt fastening grooves 2 are provided through both ends of the top two sides of the foundation support plate 1. An installation plate 3 is provided in the middle of the top of the foundation support plate 1. Reinforcing components 4 are provided at the bottom ends of both sides of the installation plate 3. A transverse adjustment hole 5 is provided through one side of the top of the installation plate 3. An adjustment mechanism 6 is provided in the transverse adjustment hole 5. A support mechanism 7 is provided on one side of the adjustment mechanism 6.

[0019] Specifically, the foundation support plate 1 can be stably fixed in the frame T-slot of the general tooling of the base frame by means of the bolt fastening groove 2.

[0020] With the help of the above-mentioned technical solution of the present invention, the present invention has a scientific and novel structure, which fully considers the centering and assembly characteristics of the base frame side beams of the all-welded aluminum alloy base frame, and can realize the rapid centering and adjustment assembly of the base frame profiles. After using the present invention, the operator can quickly perform assembly and adjustment of the base frame profiles, ensuring the operability and convenience of the operator during operation, improving the operator's work efficiency, and greatly improving the process quality of the base frame side beam centering, which can effectively avoid the generation of dimensional problems in the assembly quality of the base frame centering.

[0021] In one embodiment, for the aforementioned reinforcing component 4, lateral adjustment hole 5, and adjustment mechanism 6, the reinforcing component 4 includes a first supporting reinforcing rib plate 401 symmetrically arranged at the bottom end of one side of the mounting plate 3 (in specific applications, the cross-sections of the first supporting reinforcing rib plate 401 and the second supporting reinforcing rib plate 402 are set as triangular structures), and a second supporting reinforcing rib plate 402 symmetrically arranged at the bottom end of the other side of the mounting plate 3 (in specific applications, the bottom ends of both the first supporting reinforcing rib plate 401 and the second supporting reinforcing rib plate 402 are fixedly connected to the top end of the foundation support plate 1); the height of the lateral adjustment hole 5 is equal to the welding height of the base frame assembly of the all-welded aluminum alloy production platform, and the width of the lateral adjustment hole 5 is equal to the welding width of the side beam assembly of the base frame of the subway model in the all-welded aluminum alloy production platform; the adjustment mechanism 6 includes an installation component 601 arranged on one side of the lateral adjustment hole 5, and an installation component 601 arranged on the other side of the lateral adjustment hole 5. A fixing component 602 is provided to cooperate with the mounting component 601. The mounting component 601 includes a jack support base plate 6011 located on one side of the transverse adjustment hole 5. Mounting holes 6012 are symmetrically opened in the middle of one side of the jack support base plate 6011, and fastening bolts 6013 are installed in the mounting holes 6012. The fixing component 602 includes a connecting fastening plate 6021 located on the other side of the transverse adjustment hole 5. Fastening holes 6022 that cooperate with the fastening bolts 6013 are symmetrically opened in the middle of one side of the connecting fastening plate 6021. A fastening nut 6023 that cooperates with the fastening hole 6022 is provided at one end of the fastening bolt 6013. This allows the device to adapt to the difference in the width direction of the aluminum alloy thick-walled profiles of the subway underframe side beams in different projects. By adjusting the mounting component 601 and the fixing component 602, the clamp can adapt to the changes in the transverse width of the underframe side beams in different projects, increasing the versatility of the device.

[0022] The working principle of the reinforcing component 4, the lateral adjustment hole 5, and the adjustment mechanism 6 is as follows: First, through the combined action of the first supporting reinforcing rib plate 401 and the second supporting reinforcing rib plate 402, a stable force triangle structure is formed on both sides of the mounting plate 3, which can strengthen the support force on both sides of the mounting plate 3. Furthermore, the first supporting reinforcing rib plate 401 and the second supporting reinforcing rib plate 402 can offset and compensate for the lateral support force of the jack. Simultaneously, the height of the lateral adjustment hole 5 is equal to the welding height of the base frame assembly of the all-welded aluminum alloy production platform, and the width of the lateral adjustment hole 5 is equal to the welding height of the all-welded aluminum alloy production platform. In the aluminum alloy production platform, the welded width of the side beams of the subway car's underframe is equal, thus adapting to the use of different aluminum alloy underframe side beams. In addition, since the lateral dimensions of the underframe side beams vary for different car models, the adjustment mechanism 6 can be adjusted in the X-axis direction by adjusting the position of the jack support base plate 6011 and the connecting fastening plate 6021 to accommodate different underframe side beam widths. After the lateral adjustment is completed, the positions of the jack support base plate 6011 and the connecting fastening plate 6021 can be fixed by the cooperation of the fastening bolts 6013 and the fastening nuts 6023.

[0023] In one embodiment, the support mechanism 7 includes a U-shaped jack support 701 disposed on one side of the adjustment mechanism 6 (in specific applications, a 5-ton mechanical jack is horizontally placed at the top of the U-shaped jack support 701). Support reinforcement plates 702 that cooperate with the installation assembly 601 are provided on both sides of one end of the U-shaped jack support 701. A radial compensation assembly 703 is provided at the top of the other end of the U-shaped jack support 701. The height of the U-shaped jack support 701 is the same as the welding height of the subway car's underframe in the all-welded aluminum alloy production platform. Similarly, the radial compensation component 703 includes a U-shaped compensation support 7031 disposed at the top of one end of the U-shaped jack support 701. The two ends of the U-shaped compensation support 7031 are symmetrically provided with first columnar supports 7032 that cooperate with the U-shaped jack support 701, and the bottom end of the U-shaped compensation support 7031 is provided with a second columnar support 7033 that cooperates with the U-shaped jack support 701. Thus, the U-shaped jack support 701 can ensure that the jack will not roll when it is laid down, effectively limiting the 5-ton jack when it is laid down, and ensuring the stability of the clamping process.

[0024] The working principle of the support mechanism 7 is as follows: First, the 5-ton mechanical jack is placed horizontally on the top of the U-shaped jack support 701. The U-shaped structure of the U-shaped jack support 701 can effectively prevent the jack from rolling when it is lying down. Then, the U-shaped jack support 701 is reinforced by the support reinforcement plate 702 to increase the supporting force of the U-shaped jack support 701. At the same time, the first column support 7032 and the second column support 7033 can compensate for the radial height difference of the jack, which facilitates the fine adjustment of the radial height of the jack.

[0025] According to another embodiment of the present invention, an operating process for a centering clamp for the side beams of a subway underframe is also provided, such as... Figure 6 As shown, the operation process includes the following steps: S1. The invention is fixed to the east end of the base frame assembly welding jig by the cooperation of the bolt fastening groove 2 and the bolt. The jack is placed horizontally to the top of the U-shaped jack support seat 701. Then, the base frame side beam is hoisted by the overhead crane and placed to the top of the base frame assembly welding jig. Specifically, the base frame's inherent tooling is arranged in an east-west direction, with a length of 20 meters and a north-south width of 3.5 meters.

[0026] Specifically, using two overhead cranes and two 2-ton slings, the east and west traction bolsters were respectively hoisted and placed on top of the bottom frame welding jig.

[0027] Specifically, two overhead cranes and two 2-ton short slings are used to lift the side beams of the base frame onto the corresponding fixtures on the original base frame assembly jig. The fixtures of this invention are left and right parts, both placed at the east end of the base frame assembly jig, and fixedly connected to the two sides of the east end of the base frame assembly jig by the bolt fastening groove 2 and the bolt.

[0028] S2. Adjust the lateral position of the support mechanism 7 by adjusting the adjustment mechanism 6 so that the support mechanism 7 can adapt to the lateral cross-sectional dimensions of the side beam of the chassis of different vehicle models. Specifically, the transverse cross-sectional dimensions of the underframe side beams vary depending on the vehicle model, and the length of the processed underframe side beams also has tolerances. The transverse position of the support mechanism 7 can be adjusted by the adjustment mechanism 6 to adapt to the use of the underframe side beam ends in different projects, thereby satisfying the universality of the fixture for aluminum alloy profiles of underframe side beams with different end cross-sectional dimensions.

[0029] S3. After the lateral adjustment is completed, if the side beam of the base frame is biased to the east in the longitudinal direction, the jack is finely adjusted in the longitudinal direction by using the U-shaped jack support 701 and the radial compensation component 703 until the center point of the side beam of the base frame corresponds to the tooling center of the base frame. If the side beam of the base frame is biased to the west in the longitudinal direction, the center of the side beam of the base frame is biased to the east in the longitudinal direction by manually hitting the west end of the side beam of the base frame. Then the jack is finely adjusted in the longitudinal direction by using the U-shaped jack support 701 and the radial compensation component 703 until the center point of the side beam of the base frame corresponds to the tooling center of the base frame. S4. After the end of the base frame side beam is adjusted to meet the process requirements, the base frame side beam at the top of the base frame assembly welding jig is welded and fixed.

[0030] Specifically, after the ends of the base frame side beams are adjusted to meet the process requirements, the two base frame side beams inside the base frame mold and the traction end crossbeams on the east and west sides are separately segmentally welded and fixed. After the assembly and fixing are completed, all the tooling fixtures of the base frame mold are opened and rotated to a position that does not affect the exit of the base frame from the mold. Then, the base frame is lifted into the base frame positioner assembly and welding fixture using two overhead cranes and two 8-ton slings.

[0031] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below.

[0032] This invention fully considers the assembly characteristics of the all-welded aluminum alloy base frame's side beam alignment, enabling rapid alignment and adjustment of the base frame profiles. This ensures the alignment of the base frame's side beams and meets the process requirements of the bolster beams within the base frame. Unlike before this invention, when the base frame side beams were hoisted onto the base frame assembly jig, alignment required operators at both ends of the side beam, with another operator checking the alignment at the center line. The operators at both ends had to use large wooden mallets, following the instructions of the operator in the middle, to hammer the ends of the side beams in different directions to achieve alignment. With this invention, operators can quickly assemble and adjust the base frame profiles, ensuring operability and convenience, improving work efficiency, and significantly enhancing the alignment quality of the base frame's side beams. This effectively avoids dimensional errors caused by poor assembly quality during base frame alignment.

[0033] In practical application, firstly, two overhead cranes and two 2-ton long slings are used to hoist the east and west traction bolsters onto the top of the base frame assembly jig of the all-welded aluminum alloy production platform. The clamps of this invention are symmetrically arranged on both sides of the east end of the base frame assembly jig. Then, using two overhead cranes and two 2-ton short slings, the base frame side beams are hoisted onto the existing base frame assembly jig and lowered onto the corresponding universal tooling. The lateral position of the support mechanism 7 is adjusted by the adjustment mechanism 6 to adapt the clamps to the dimensions of the base frame side beam ends for different projects (adjustment). (The working principle of mechanism 6 is as described above). After the horizontal adjustment is completed, the jack is then finely adjusted longitudinally by the support mechanism 7 until the center point of the base frame side beam corresponds to the tooling center of the base frame (the working principle of support mechanism 7 is as described above). After adjusting the longitudinal dimension and allowing the jack's stroke margin, the bolts in the bolt fastening groove 2 are tightened to fasten the fixture in the T-slot of the base frame general tooling. Thus, the base frame side beam is clamped and fixed by the action of the clamps on both sides, and the welding and fixing operation of the base frame side beam at the top of the base frame welding jig can be carried out.

[0034] In summary, by utilizing the above-mentioned technical solution of this invention, rapid alignment and adjustment of the underframe profiles can be achieved, ensuring the alignment of the underframe side beams and meeting the process requirements of the sleeper beams within the underframe. Unlike before the invention, when the subway underframe side beams were hoisted onto the underframe welding jig, alignment required operators at both ends of the side beam, with another operator checking the alignment at the center line. Simultaneously, the operators at both ends needed to use large wooden mallets, following the instructions of the operator in the middle, to hammer the ends of the side beams in different directions to achieve alignment. With this invention, operators can quickly assemble and adjust the underframe profiles, ensuring operability and convenience during operation, improving work efficiency, and effectively avoiding dimensional problems in the underframe alignment, thus improving the process quality of the underframe side beam alignment.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A centering clamp for the side beams of a subway underframe, comprising a foundation support plate (1), characterized in that, Bolt fastening grooves (2) are provided through both ends of the top two sides of the foundation support plate (1). An installation plate (3) is provided in the middle of the top of the foundation support plate (1). Reinforcing components (4) are provided at the bottom of both sides of the installation plate (3). A transverse adjustment hole (5) is provided through one side of the top of the installation plate (3). An adjustment mechanism (6) is provided in the transverse adjustment hole (5). A support mechanism (7) is provided on one side of the adjustment mechanism (6). The adjustment mechanism (6) includes an installation component (601) provided on one side of the transverse adjustment hole (5). The support mechanism (7) includes a U-shaped jack support base (701) disposed on one side of the adjustment mechanism (6). Both sides of one end of the U-shaped jack support base (701) are provided with support base reinforcement plates (702) that cooperate with the installation component (601). The top of the other end of the U-shaped jack support base (701) is provided with a radial compensation component (703). The radial compensation component (703) includes a U-shaped compensation support (7031) disposed at the top of one end of the U-shaped jack support (701), with a first columnar support (7032) symmetrically disposed at both ends of the U-shaped compensation support (7031) to cooperate with the U-shaped jack support (701), and a second columnar support (7033) disposed at the bottom end of the U-shaped compensation support (7031) to cooperate with the U-shaped jack support (701).

2. The centering clamp for the side beams of a subway underframe according to claim 1, characterized in that, The reinforcing component (4) includes a first supporting reinforcing rib (401) symmetrically arranged at the bottom end of one side of the mounting plate (3), and a second supporting reinforcing rib (402) symmetrically arranged at the bottom end of the other side of the mounting plate (3).

3. The centering clamp for the side beams of a subway underframe according to claim 1, characterized in that, The height of the lateral adjustment hole (5) is equal to the welding height of the base frame of the all-welded aluminum alloy production platform, and the width of the lateral adjustment hole (5) is equal to the welding width of the side beam of the base frame of the subway model in the all-welded aluminum alloy production platform.

4. A centering clamp for the side beams of a subway underframe according to claim 1, characterized in that, On the other side of the lateral adjustment hole (5), there is a fixing component (602) that cooperates with the mounting component (601).

5. A centering clamp for the side beams of a subway underframe according to claim 4, characterized in that, The mounting assembly (601) includes a jack support base plate (6011) disposed on one side of the transverse adjustment hole (5), and mounting holes (6012) are symmetrically opened in the middle of one side of the jack support base plate (6011), and fastening bolts (6013) are disposed in the mounting holes (6012).

6. A centering clamp for the side beams of a subway underframe according to claim 5, characterized in that, The fixing component (602) includes a connecting fastening plate (6021) disposed on the other side of the transverse adjustment hole (5). A fastening hole (6022) that mates with the fastening bolt (6013) is symmetrically opened in the middle of one side of the connecting fastening plate (6021). A fastening nut (6023) that mates with the fastening hole (6022) is provided at one end of the fastening bolt (6013).

7. A centering clamp for the side beams of a subway underframe according to claim 1, characterized in that, The height of the U-shaped jack support (701) is equal to the welding height of the subway car's underframe assembly in the all-welded aluminum alloy production platform.

8. A process for operating a centering clamp for the side beams of a subway underframe, used to operate the centering clamp for the side beams of the subway underframe as described in any one of claims 1-7, characterized in that, The process includes the following steps: S1. Fix the present invention to the east end of the base frame welding jig by the cooperation of the bolt fastening groove (2) and the bolt, place the jack horizontally to the top of the U-shaped jack support seat (701), and then use the overhead crane to lift the base frame side beam and lower the base frame side beam to the top of the base frame welding jig. S2. The lateral position of the support mechanism (7) is adjusted by the adjustment mechanism (6) so that the support mechanism (7) can adapt to the lateral cross-sectional dimensions of the side beams of different vehicle models. S3. After the lateral adjustment is completed, if the side beam of the base frame is biased to the east in the longitudinal direction, the jack is finely adjusted in the longitudinal direction by means of the U-shaped jack support (701) and the radial compensation component (703) until the center point of the side beam of the base frame corresponds to the tooling center of the base frame. If the side beam of the base frame is biased to the west in the longitudinal direction, the center of the side beam of the base frame is biased to the east in the longitudinal direction by manually hitting the west end of the side beam of the base frame. Then the jack is finely adjusted in the longitudinal direction by means of the U-shaped jack support (701) and the radial compensation component (703) until the center point of the side beam of the base frame corresponds to the tooling center of the base frame. S4. After the end of the base frame side beam is adjusted to meet the process requirements, the base frame side beam at the top of the base frame assembly welding jig is welded and fixed.

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