Passenger car body framework assembly tool and method

Abstract

The invention relates to the technical field of passenger car body framework assembly, and discloses a passenger car body framework assembly tool and method, a mould is provided with a plurality of positioning blocks, the positioning blocks are used for positioning a car body framework, one side of each positioning block is provided with an electromagnetic attraction structure, and the mould fixes the position of the car body framework through the positioning blocks and the electromagnetic attraction structures; the jig frame serves as a jig supporting frame, the jig is fixed to the jig frame, a plurality of jacking structures are arranged on the jig frame, setting point positions of the jacking structures are correspondingly located at key stress point positions of the vehicle body framework, after the vehicle body framework is installed and welded, the electromagnetic attraction structure is powered off, the framework is jacked up through the jacking structures, and demolding is completed; by adopting the mode of combining adsorption fixation of the electromagnetic adsorption structure and multi-point ejection of the jacking structure, rapid positioning during assembly of the vehicle body framework and rapid ejection demolding after assembly are achieved, the problems that a traditional clamp is inaccurate in positioning, the framework deforms and the like when a large framework is assembled are solved, and the assembly efficiency and precision are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of bus body frame assembly, in particular to a bus body frame assembly tool and method. Background Art

[0002] With the rapid development of modern bus manufacturing industry, the complexity and precision requirements of the body structure are constantly increasing, especially the assembly of the left and right side frames of the bus is even more crucial. As the main load-bearing part of the body, the left and right side frames have complex shapes and large sizes, which puts extremely high requirements on the precision and efficiency of assembly. In the traditional assembly process, mechanical fixtures are widely used to fix and position the frames, but this method has many problems when dealing with large-area frames and cannot fully meet the current increasingly complex manufacturing needs.

[0003] Traditional mechanical clamps usually rely on positioning blocks and fixing bolts to position and fix the skeleton. This mechanical clamping method is cumbersome to operate and time-consuming and laborious to adjust, especially when dealing with left and right skeletons of different sizes and shapes. The clamps need to be frequently replaced or adjusted, which not only increases the complexity of production, but also affects assembly efficiency. In addition, the fixing position of traditional mechanical clamps is limited, and the positioning accuracy and stability are difficult to guarantee. Due to the large size and complex shape of the skeleton, a single mechanical clamp cannot achieve uniform support and fixation of the entire skeleton, which can easily cause local uneven force, resulting in slight deformation or displacement of the skeleton during the assembly process, affecting the final assembly quality.

[0004] In terms of frame demoulding, the bus body frame is mainly demoulded manually after welding. When the left and right side frames of the body are welded to the body structure, the frame assembly will experience thermal deformation, resulting in difficulty in demoulding. Operators often use lifting and lever prying to demould. Due to the small number of stress points and uniform force, this demoulding method is prone to cause frame deformation, which will directly increase the amount of frame correction deformation and affect the assembly accuracy of the vehicle frame. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a coach body frame assembly tool and method, which adopts a combination of electromagnetic suction structure adsorption and fixation and jacking structure multi-point ejection to achieve rapid positioning of the body frame during assembly and rapid ejection and demoulding after assembly. It not only solves the problems of inaccurate positioning, unstable fixation and uneven ejection force of traditional clamps when assembling large frames, but also greatly improves the efficiency and accuracy of assembly.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, a bus body frame assembly tool comprises:

[0008] A jig is provided with a plurality of positioning blocks, which are used to position the body frame. An electromagnetic suction structure is provided on one side of each positioning block. The jig fixes the position of the body frame through the positioning blocks and the electromagnetic suction structure.

[0009] The tire frame serves as a support frame for the tire jig, and the tire jig is fixed on the tire frame. The tire frame is provided with a number of jacking structures. The setting points of the jacking structures correspond to the key stress points of the vehicle body frame. After the assembly and welding of the vehicle body frame is completed, the electromagnetic suction structure is powered off, and the frame is lifted up by the jacking structure to complete the demoulding.

[0010] As a further implementation, the jig and the frame are both frame-type structures, and are both modular structures; corresponding jigs and frames can be spliced ​​according to different vehicle body frame types.

[0011] As a further implementation, the bottom of the tire frame is supported by a plurality of height-adjustable support legs to adjust the height of the tire frame.

[0012] As a further implementation method, a positioning steel plate is provided on the side of the positioning block, and the electromagnetic suction structure is installed on the positioning steel plate.

[0013] As a further implementation method, the positioning steel plate is provided with mounting holes and wiring holes for the electromagnetic suction structure.

[0014] As a further implementation, the jacking structure includes a cylinder, and the cylinder is installed on a tire frame or on the ground through a cylinder bracket.

[0015] As a further implementation method, the cylinder bracket is fixedly connected to the tire frame, and a buffer pad is provided at the connection; an elastic shock absorbing device is provided between the cylinder and the cylinder bracket.

[0016] As a further implementation method, the electromagnetic suction structure and the lifting structure are connected to a control system to achieve adjustable magnitudes of the magnetic suction force and the lifting force.

[0017] As a further implementation method, a positioning steel plate is welded on one side of the corresponding position on the frame structure of the mold for installing the electromagnetic suction structure.

[0018] In a second aspect, a bus body frame assembly method is provided, using any of the bus body frame assembly tooling as described above, comprising the following steps:

[0019] Install the tire frame and adjust its height, then install the jig and fix the jig to the tire frame; install the electromagnetic suction structure and the jacking structure, place the left and right side frames of the bus on the jig, start the electromagnetic suction structure to adsorb the frames to ensure that they are fixed; cut off the power of the electromagnetic suction structure and move the jacking structure for demoulding.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention arranges an electromagnetic suction structure at the position of the positioning block on the tire, and arranges a lifting structure on the tire frame. The electromagnetic suction structure is combined with the multi-point ejection of the lifting structure to achieve rapid positioning of the vehicle body frame during assembly and rapid ejection and demoulding after assembly. It not only solves the problems of inaccurate positioning, unstable fixation and uneven ejection force of traditional clamps when assembling large frames, but also greatly improves the efficiency and accuracy of assembly.

[0022] 2. The jacking structure of the present invention is evenly distributed on the key points of the tire frame, corresponding to the key stress points of the vehicle body frame to be assembled, so as to achieve uniform ejection of the vehicle body frame, ensure that each ejection point can exert force synchronously, ensure the force balance in the entire demoulding process, avoid deformation or stress concentration of the frame during ejection, and ensure the stability and smoothness of demoulding.

[0023] 3. The tire frame and the jig of the present invention adopt a modular design. Workers can quickly replace or adjust the modules according to different models of left and right side frames to meet different types of assembly requirements, so that the production line does not need to frequently replace the fixtures or perform complex adjustments when facing different models of left and right side frames of buses. Through simple module replacement or adjustment, the jig can adapt to various specifications of frame structures, greatly improving the adaptability and work efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 1 is a schematic diagram of the overall structure of a bus body frame assembly tool in an embodiment of the present invention;

[0026] Figure 2 It is a partially enlarged schematic diagram of a bus body frame assembly tooling according to an embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of the electromagnetic suction part in an embodiment of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the jacking structure in an embodiment of the present invention.

[0029] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0030] Among them: 1. tire frame; 2. cylinder bracket; 3. positioning steel plate; 4. tire jig; 5. electromagnet; 6. cylinder; 7. positioning block; 8. support foot. DETAILED DESCRIPTION

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] Embodiment 1

[0033] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a bus body frame assembly tool includes a jig and a jig frame, wherein the jig is used to cooperate with the body frame to realize the positioning of the body frame, and the jig frame is used to support the jig and fix the position of the jig. The structure of the assembly tool includes a jig frame 1, a cylinder bracket 2, a positioning steel plate 3, a jig 4, an electromagnet 5, a cylinder 6, and a positioning block 7.

[0034] A plurality of positioning blocks 7 are provided on the jig 4, and the positioning blocks 7 are used to position the vehicle body frame. An electromagnetic suction structure is provided on one side of each positioning block 7. The jig 4 fixes the position of the vehicle body frame through the positioning blocks 7 and the electromagnetic suction structure; wherein the positioning blocks 7 are used to limit the lateral position of the vehicle body frame, and the electromagnetic suction structure is used to limit the vertical displacement of the vehicle body frame.

[0035] The tire frame 1 serves as a support frame for the jig 4, and the jig 4 is fixed on the top of the tire frame 1. A number of jacking structures are provided on the tire frame 1. The setting points of the jacking structures correspond to the key stress points of the vehicle body frame. After the assembly and welding of the vehicle body frame is completed, the electromagnetic suction structure is powered off, and the frame is lifted up by the jacking structure to complete the demoulding.

[0036] The positioning block 7 stands on the jig 4, and the positioning block 7 is installed by welding. A positioning steel plate 3 is vertically arranged on the side of the positioning block 7, and the electromagnetic suction structure is installed on the positioning steel plate 3 on one side of the positioning block 7. The electromagnetic suction structure adopts an electromagnet 5, and a plurality of wiring holes with a diameter of 20 mm and a mounting hole with a diameter of 12 mm are reserved on the surface of the positioning steel plate 3. The mounting hole is used for positioning and installing the electromagnet 5, and the wiring hole is used for the wiring of the electromagnet, which is convenient for laying and fixing the wires of the electromagnet, and can effectively avoid the problems of cluttered lines or unstable installation of the electromagnet, and also improve the aesthetics and ease of operation of the fixture.

[0037] The material of the positioning steel plate 3 is high-strength steel, which can maintain a stable structure under a large load and will not deform due to long-term use. At the same time, the design of the wiring hole allows the circuit of the electromagnet 5 to be safely and neatly arranged to avoid affecting the normal use of the workpiece during assembly operation.

[0038] The positioning steel plate 3 is used as the installation platform of the electromagnet. A high-strength steel plate with a thickness of 10 mm is selected. A layer of anti-rust paint is coated on the surface of the steel plate to extend its service life, so that the steel plate has good corrosion resistance and deformation resistance.

[0039] The thickness of the positioning block 7 is greater than that of the positioning steel plate, and the material is a high-strength steel with a thickness of 15 mm, which can better support the weight of the skeleton and ensure that the skeleton does not move during the assembly process. The width and thickness of the positioning block can be adjusted according to the size of different skeletons to adapt to skeleton structures of different specifications. At the same time, the positioning block 7 is made of wear-resistant material to increase its service life and reduce the maintenance cost of the fixture. Through this improved design, the skeleton fixation has higher stability and reliability, which is particularly suitable for the assembly of large-area skeletons.

[0040] The positioning block 7 of this embodiment adopts a widened and thickened design, which effectively enhances the bearing capacity and stability of the positioning block, ensuring that the skeleton can be stably and accurately supported during assembly. Especially when facing a larger or irregularly shaped skeleton, the positioning block 7 can provide more comprehensive support to avoid the displacement problem caused by uneven force on the skeleton. The overall structure of the positioning block and the mold is connected by precision welding to ensure that it will not deform or loosen due to stress concentration during long-term use, thereby improving the reliability of assembly.

[0041] The length of the positioning block 7 is 100 mm to 300 mm, and the width is 50 mm to 150 mm. The layout of the positioning blocks is adjusted according to the shape and size of the skeleton to ensure its accuracy during assembly. When installing the positioning blocks, it is necessary to ensure that they are firmly connected to the mold to avoid loosening or displacement during long-term use. The precise design of the positioning blocks 7 effectively improves the accuracy of assembly and ensures that the skeleton maintains a stable position and direction during assembly.

[0042] The electromagnets 5 are evenly distributed on the positioning steel plate 3 of the mold 4, and are used to quickly adsorb and fix the left and right side skeletons during the assembly process. The adsorption force of each electromagnet is between 50N and 500N, which is adjusted by controlling the current to adapt to skeletons of different weights and sizes. The adsorption area of ​​the electromagnet is 30cm2 to 80cm2 to ensure the stable adsorption effect of the skeleton. When assembling the left and right side skeletons, the power on and off of the electromagnets are controlled by the central control system to achieve rapid adsorption and release of the skeleton. The arrangement of the electromagnets 5 is uniform and precise to ensure the stability of the skeleton during the assembly process. Since the adsorption force of the electromagnets 5 can be flexibly adjusted, when facing different types of skeletons, the adsorption force can be adjusted according to actual needs to avoid displacement or damage of the skeleton due to insufficient or excessive adsorption force.

[0043] Considering that traditional mechanical clamps mostly rely on physical locking and bolting to fix the frame to the mold, it is not only time-consuming and labor-intensive, but also prone to instability when handling complex frames.

[0044] This embodiment introduces an electromagnet adsorption system by arranging electromagnets 5 on the side of the positioning block 7. The advantage of the electromagnets 5 is that they can be quickly and stably fixed in a short time through electromagnetic adsorption force. The electromagnets 5 can be flexibly arranged on the positioning steel plate of the positioning block 7 according to the size and shape of different skeletons, and the skeleton is firmly adsorbed on the positioning block through magnetic force, providing stable support.

[0045] This electromagnetic adsorption method can complete the frame fixing operation in a short time. The rapid adsorption function of the electromagnet makes frame fixing easier and more efficient. Compared with the traditional mechanical locking method, the assembly time is significantly shortened, which improves the overall efficiency of the production line and avoids the repeated adjustments required when using traditional mechanical clamps, greatly improving the assembly efficiency. In addition, the strength of electromagnetic adsorption can be adjusted according to actual needs to adapt to frames of different weights and thicknesses, ensuring that the frame remains stable during processing and avoiding displacement or misalignment problems caused by unstable assembly.

[0046] The adsorption of the electromagnet 5 can not only quickly fix the frame, but also flexibly adjust the adsorption position according to the different sizes and shapes of the frame, so as to achieve all-round support for the frame. In a preferred example, the position of the positioning steel plate 3 is not limited to the side of the positioning block 7, but the positioning steel plate 3 can also be welded on the frame of the mold 4 corresponding to the key stress points of the body frame, and the electromagnet can be installed to achieve a reasonable arrangement of the position of the electromagnet 5 according to the type of the body frame.

[0047] Since the electromagnet 5 can be adsorbed instantaneously by electromagnetic force, the operator does not need to perform time-consuming steps such as complicated adjustments or tightening bolts, thereby greatly reducing the assembly time and improving production efficiency. At the same time, the adsorption strength of the electromagnet can be adjusted according to the weight and material properties of the skeleton to ensure that there will be no problems of unstable fixation or too little adsorption force during the adsorption process. This design makes the present invention particularly suitable for large-scale, fast-assembly production scenarios, greatly improving the automation level of the production line.

[0048] The jig of this embodiment adopts a modular design, including multiple replaceable jig modules, which are connected to the jig frame through a quick disassembly device. Workers can quickly replace or adjust the modules according to different models of left and right side frames to meet different types of assembly requirements, so that the production line does not need to frequently replace the fixture or perform complex adjustments when facing different models of left and right side frames of buses. Through simple module replacement or adjustment, the jig can adapt to various specifications of frame structures, greatly improving the adaptability and work efficiency of the production line.

[0049] The tire frame 1 is a supporting frame for the tire jig 4. The overall structure is a frame-type structure with a modular design. The tire frame 1 is composed of multiple sets of frame modules and can be flexibly adjusted according to the left and right side frames of different specifications. The tire frame 1 provides support for the entire tire jig 4. Its structural design is simple and sturdy, which is easy to install and maintain. The modular design of the tire frame 1 also allows the tire jig to be quickly replaced or adjusted to adapt to frames of different sizes and shapes, which improves the flexibility and adaptability of the production line.

[0050] Specifically, multiple groups of frame modules are fixed and spliced ​​by bolts or welding to ensure the firmness of the installation. The entire tire frame structure is light and high in strength, which can ensure stability while reducing the overall weight and reducing the difficulty of operation for workers.

[0051] Furthermore, the bottom of the tire frame is also designed with an adjustable support structure, which can be adjusted according to the height requirements of the production line to adapt to different production environments. The support structure includes support feet, each of which can be finely adjusted according to the actual height adjustment range of the production line, and the adjustment range is 50mm to 200mm to adapt to different assembly workbench heights. The top of the support foot 8 is fixedly connected to the bottom of the tire frame 1, and the bottom of the support foot 8 is used to support on the ground. The main structure of the tire frame 1 is made of high-strength steel and has good deformation resistance to ensure the overall stability of the tire.

[0052] In this embodiment, the cylinder bracket 2 is installed at 21 points of the tire frame. The lifting structure adopts the cylinder 6, which is fixed on the cylinder bracket 2. The cylinder bracket 2 and the cylinder 6 are connected by an elastic shock-absorbing device. The elastic shock-absorbing device includes a rubber pad and a shock-absorbing spring to reduce the vibration and impact generated during the ejection process of the cylinder, ensure the stability of the ejection process, and extend the service life of the cylinder and the bracket.

[0053] In a preferred example, the bottom end of the cylinder bracket 2 can be fixed on the ground, and the cylinder 6 is installed on the top end of the cylinder bracket 2. The cylinder bracket 2 can pass through the tire frame of the frame structure, so that the cylinder can lift the body frame upward at a specified position; the technician can choose to install the cylinder bracket on the tire frame or at a specified position on the ground according to specific circumstances. The height of the cylinder bracket 2 can be selected according to different circumstances.

[0054] The function of cylinder 6 is to eject the left and right side frames after assembly is completed, so as to facilitate the removal of the frames. The setting point of cylinder 6 corresponds to the key stress point of the body frame, so that the body frame can be ejected evenly during demoulding, avoiding deformation or damage of the frame due to uneven local stress during the ejection process. The ejection force and stroke of cylinder 6 can be adjusted to adapt to frames of different sizes and weights.

[0055] The ejection force of the cylinder 6 is accurately distributed according to the force requirements of each ejection point to ensure that the left and right side frames will not be locally subjected to excessive force during the ejection process, thereby avoiding deformation or damage of the frame.

[0056] The cylinder bracket 2 is used to support multiple ejection cylinders, and its layout can be adjusted according to the specific shape and size of the left and right side frames of the bus to adapt to the frames of different models. During the installation process, the cylinder bracket 2 is fixed to the specified position of the tire frame by bolts, and a buffer pad is installed at the connection to further reduce the impact force of the cylinder during the ejection process. After the cylinder bracket 2 is installed, the cylinder 6 is fixed to the bracket, and the layout of the cylinder bracket 2 is adjusted according to the shape of the left and right side frames to ensure that the ejection force is evenly distributed on the key parts of the frame to avoid deformation of the frame due to excessive local force. The cylinder bracket 2 is designed with an anti-vibration structure, which can effectively absorb vibration and impact during the ejection process of the cylinder 6 to ensure the stability of the ejection force.

[0057] The reasonable distribution of cylinder 6 and uniform ejection force can effectively avoid damage to the frame during demoulding, especially when dealing with large and complex structure frames, ensuring that all parts of the frame can be subjected to stable ejection force, reducing the risk of damage caused by excessive local stress concentration. This not only improves the assembly quality, but also reduces the chance of rework and repair, thereby improving the overall efficiency of the production line.

[0058] When installing the cylinder, fix the cylinder 6 on the cylinder bracket 2 and ensure that the position of each cylinder corresponds to the key point of the frame. The ejection force of the cylinder is driven by compressed air and is uniformly managed by the central control system to control the ejection speed and stroke of the cylinder 6. The ejection parameters of each cylinder 6 can be adjusted in real time through the control system to ensure smooth and uniform ejection of the frame.

[0059] The cylinder 6 of this embodiment is a double-acting cylinder. The working pressure range of the cylinder is 0.4MPa to 0.8MPa. The ejection force of the cylinder is adjusted by controlling the pressure of the compressed air. The ejection stroke of each cylinder is 50mm to 150mm. The ejection speed of the cylinder is uniformly managed by the central control system to ensure the uniformity and synchronization of the ejection force.

[0060] The control system of this embodiment can control the action of the cylinder 6 and the electromagnet 5, automatically adjust the adsorption force of the electromagnet 5 and the ejection force of the cylinder 6 according to different types of frames, and monitor the working status of each component in real time. When assembling the left and right side frames, the operator can adjust the working parameters of the electromagnet and the cylinder in real time through the control system interface to ensure the stability and safety of the assembly process.

[0061] The control system has a fault alarm function. When an abnormal situation occurs in the electromagnet or the cylinder, the system will automatically sound an alarm and stop operating. The operation process is as follows: first, place the skeleton on the mold, and activate the adsorption function of the electromagnet through the control system to firmly fix the skeleton. After the assembly is completed, the control system will cut off the power of the electromagnet, release the skeleton, and activate the ejection function of the cylinder to eject the skeleton from the mold.

[0062] The overall structure of the tooling in this embodiment is simple and reasonable, which is convenient for workers to install and maintain, and reduces the maintenance cost and downtime caused by complex equipment. Through the standardized design scheme, the factory can quickly adjust the equipment according to the needs of different products, enhancing the flexibility and efficiency of the production process.

[0063] Embodiment 2

[0064] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a bus body frame assembly method, using the bus body frame assembly tool of embodiment 1, comprises the following steps:

[0065] 1. Installation and debugging of the tire jig: Select the corresponding module according to the type of body frame at the designated station of the production line to install the tire frame 1, and adjust the height of the tire frame 1 through the support feet 8 and fix it to ensure that it is stable and level. Then install the tire jig 4 and fix the tire jig 4 to the tire frame 1. When installing the tire frame, first place the tire frame 1 on the assembly station in the workshop and ensure that it is horizontal. Then, fine-tune the support feet 8 at the bottom to ensure that the height of the tire frame is consistent with that of the production line, which is convenient for the subsequent assembly of the left and right side frames. After the adjustment of the tire frame 1 is completed, fix the tire frame 1 to the ground to prevent displacement during the assembly process, thereby ensuring the accuracy and safety of the assembly process.

[0066] 2. Installation and wiring of electromagnet 5: Arrange the electromagnet 5 evenly on the positioning steel plate 3, and lay the wires through the wiring holes and connect them to the control system.

[0067] 3. Installation and adjustment of cylinder 6: Fix cylinder 6 on cylinder bracket 2 and adjust its position to correspond to the key points of the frame.

[0068] 4. Body frame placement and adsorption: Place the left and right side frames of the bus on the jig, start the electromagnet to adsorb the frames to ensure they are fixed.

[0069] 5. Ejection process: After assembly is completed, the control system is powered off to release the electromagnet and start the cylinder to eject the frame.

[0070] 6. Assembly completed: After the frame is ejected, the operator removes it from the mold and proceeds to the next assembly cycle.

[0071] This automated assembly process not only reduces the technical requirements for operators, but also ensures a high degree of consistency in the assembly process, reduces the impact of human errors, and improves the overall quality and production efficiency of the product. At the same time, the introduction of automated devices makes the production line safer, and workers do not need to directly contact complex mechanical parts during operation, thereby reducing the occurrence of safety accidents.

[0072] It reduces workpiece damage and rework, thereby reducing material loss in the production process and improving overall economic benefits. At the same time, the modular design and easy maintenance of the equipment also reduce the cost of equipment maintenance and replacement, bringing significant economic benefits to the company.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bus body frame assembly tool, characterized in that: include: A jig is provided with a plurality of positioning blocks, which are used to position the body frame. An electromagnetic suction structure is provided on one side of each positioning block. The jig fixes the position of the body frame through the positioning blocks and the electromagnetic suction structure. The tire frame serves as a support frame for the tire jig, and the tire jig is fixed on the tire frame. The tire frame is provided with a number of jacking structures. The setting points of the jacking structures correspond to the key stress points of the vehicle body frame. After the assembly and welding of the vehicle body frame is completed, the electromagnetic suction structure is powered off, and the frame is lifted up by the jacking structure to complete the demoulding.

2. The bus body frame assembly tool according to claim 1, characterized in that: The tire jig and the tire frame are both frame-type structures and modular structures; corresponding tire jigs and tire frames can be spliced ​​according to different vehicle body frame types.

3. The bus body frame assembly tool according to claim 1, characterized in that: The bottom of the tire frame is supported by a plurality of height-adjustable supporting feet to adjust the height of the tire frame.

4. The bus body frame assembly tool according to claim 1, characterized in that: A positioning steel plate is provided on the side of the positioning block, and the electromagnetic suction structure is installed on the positioning steel plate.

5. The bus body frame assembly tool according to claim 4, characterized in that: The positioning steel plate is provided with mounting holes and wiring holes for the electromagnetic suction structure.

6. The bus body frame assembly tool according to claim 1, characterized in that: The jacking structure comprises a cylinder, and the cylinder is installed on a tire frame or on the ground through a cylinder bracket.

7. The bus body frame assembly tool according to claim 6, characterized in that: The cylinder bracket is fixedly connected to the tire frame, and a buffer pad is provided at the connection; an elastic shock absorbing device is provided between the cylinder and the cylinder bracket.

8. The bus body frame assembly tool according to claim 1, characterized in that: The electromagnetic suction structure and the lifting structure are connected to a control system to achieve adjustable magnitudes of the magnetic suction force and the lifting force.

9. The bus body frame assembly tool according to claim 2, characterized in that: A positioning steel plate is welded on one side of the corresponding position of the frame structure of the jig for installing the electromagnetic suction structure.

10. A method for assembling a bus body frame, characterized in that: The bus body frame assembly tool as claimed in any one of claims 1 to 9 comprises the following steps: Install the tire frame and adjust the height of the tire frame, then install the tire jig and fix the tire jig to the tire frame; install the electromagnetic suction structure and the jacking structure, place the left and right side frames of the bus on the tire jig, and start the electromagnetic suction structure to absorb the frames to ensure that they are fixed; The electromagnetic suction structure is powered off, and the lifting structure is moved for demoulding.

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