Automobile part welding equipment

Abstract

The invention relates to the field of automobile part welding, in particular to automobile part welding equipment which comprises a fixing column, a mounting bottom plate and a mounting top plate, the mounting bottom plate and the mounting top plate are arranged at the two ends of the fixing column, an outer shell and an inner shell are arranged between the mounting bottom plate and the mounting top plate, and the outer shell and the inner shell are fixed through limiting tongs; the mounting bottom plate and the mounting top plate are symmetrically arranged up and down, a lower driving part and an upper driving part are arranged in the mounting bottom plate and the mounting top plate correspondingly, and welding heads are arranged on the lower driving part and the upper driving part correspondingly. Through reverse rotation design of the upper welding head and the lower welding head and cooperation of the transmission gear and the driving gear, the upper welding head and the lower welding head rotate synchronously in opposite directions, friction torque acting on a workpiece in the welding process is effectively counteracted, torsional deformation, caused by torque superposition, of a thin-wall shell is avoided, and the welding quality is improved. The cylindricity and end face parallelism precision of a welded workpiece can be conveniently improved, and the assembling requirement of a high-precision motor shell is met.

Description

Technical Field

[0001] This invention relates to the field of automotive parts welding, and more particularly to an automotive parts welding equipment. Background Technology

[0002] As the automotive industry rapidly transforms towards lightweighting and electrification, the motor housing of new energy vehicle drive motors, as a core load-bearing and sealing component, directly determines the motor's operational stability, sealing performance, and service life through its welding quality.

[0003] Existing double-end welding equipment generally adopts a design where the upper and lower welding heads rotate in the same direction. During the welding process, the frictional torque of the upper and lower end faces is superimposed in the same direction, directly acting on the thin-walled shell, causing the workpiece to undergo torsional deformation. The cylindricity error is usually ≥0.08mm, and the parallelism error of the upper and lower end faces is ≥0.06mm. This deformation will directly cause assembly interference between the motor housing and the stator and rotor, or cause uneven fitting clearance, which will seriously affect the rotational accuracy and service life of the motor. At the same time, the superposition of torque will also lead to uneven material flow on the welding surface, which is prone to defects such as porosity and incomplete fusion, reducing the sealing performance of the joint. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of workpiece deformation caused by torque superposition in the prior art, and to propose an automotive parts welding equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An automotive parts welding device includes a fixed column and a mounting base plate and a mounting top plate disposed at both ends of the fixed column, and an outer shell and an inner shell are disposed between the mounting base plate and the mounting top plate, wherein the outer shell and the inner shell are fixed by a limiting gripper; The mounting base plate and the mounting top plate are symmetrically arranged vertically, and the mounting base plate and the mounting top plate are respectively provided with a lower driving component and an upper driving component. Both the lower driving component and the upper driving component are provided with welding heads, and the lower driving component and the upper driving component drive the welding heads to rotate in opposite directions. The lower drive component and the upper drive component include a rotating gear and a driving gear. A transmission gear is also provided in the mounting top plate. The transmission gear is positioned between the rotating gear and the driving gear to change the rotation direction of the lower drive component and the upper drive component.

[0006] Preferably, both the lower drive member and the upper drive member are provided with a gear ring, and a limiting platform is provided in the gear ring. The limiting platform is fixedly connected to the mounting top plate by a fixed shaft. The drive gear is composed of two parallel external gears, external gear one and external gear two, and external gear two and the gear ring are on the same plane.

[0007] Preferably, the welding head consists of a welding head body and an electric push rod disposed on the welding head body. The upper end of the electric push rod is provided with a sliding platform, which is slidably disposed within the mounting top plate. The upper end of the sliding platform is provided with a rotating gear, which is disposed between the gear ring and the second external gear and meshes with the gear ring and the second external gear.

[0008] Preferably, the drive gear is sleeved on the outer wall of the fixed shaft, and the top end of the fixed shaft is rotatably installed in the mounting plate. The bottom end of the fixed shaft is provided with a placement groove, and an electro-hydraulic rod is provided in the placement groove. The bottom end of the electro-hydraulic rod is provided with a support member, which is driven to move up or down by the electro-hydraulic rod.

[0009] Preferably, the support includes a mounting platform, a movable platform is provided at the bottom of the mounting platform, and the movable platform is a T-shaped column structure. Multiple pressing rods are provided at the bottom of the movable platform, and an electric telescopic rod is provided between the pressing rods and the mounting platform. The inclination of the pressing rods is adjusted by extending and retracting the electric telescopic rod.

[0010] Preferably, the bottom end of the moving platform is provided with a limiting component, and the limiting component is disposed inside the inner shell, so that the inner shell is vertically limited by the limiting component being in contact with the inner wall of the inner shell; The limiting component includes multiple mounting blocks disposed at the bottom of the moving platform, and the multiple mounting blocks are rectangular in shape. A support rod is rotatably disposed between the mounting blocks, and the inner shell is limited by the end of the support rod abutting against the inner shell.

[0011] Preferably, the mobile platform is provided with an electric telescopic rod II, the bottom end of which is provided with a fixed block. Multiple connecting plates are provided on the fixed block, and a telescopic guide rod is provided on the support rod. The telescopic guide rod is rotatably disposed between the connecting plates. The electric telescopic rod II drives the fixed block to move up and down, adjusting the tilt angle of the support rod until it is in contact with the inner wall of the inner shell.

[0012] Preferably, the mounting block is provided with a limiting plate, and the limiting plate is located on the side close to the electric telescopic rod. The rotation of the support rod is limited by the limiting plate and the support rod abutting against each other.

[0013] Preferably, a drive shaft is rotatably provided between the fixed columns, with both ends of the drive shaft extending between the mounting base plate and the mounting top plate, and both ends of the drive shaft being fixedly connected to a rotating gear.

[0014] Preferably, a drive motor is provided inside the mounting top plate, and the output end of the drive motor is fixedly connected to a rotating gear. Both the mounting bottom plate and the mounting top plate are provided with circular sliding grooves, and the sliding table is slidably disposed in the sliding grooves.

[0015] Compared with the prior art, the present invention has the following advantages: 1. This invention achieves synchronous and opposite rotation of the upper and lower welding heads through the design of reverse rotation of the upper and lower welding heads and the cooperation of the transmission gear and the drive gear. This effectively counteracts the frictional torque acting on the workpiece during the welding process, avoids torsional deformation of the thin-walled shell caused by the superposition of torque, and facilitates the improvement of the cylindricity and end face parallelism accuracy of the welded workpiece, thus meeting the assembly requirements of high-precision motor housings.

[0016] 2. This invention, through the synergistic action of the support and limiting components, positions and supports the inner shell, preventing relative displacement or shaking between the inner and outer shells during welding, thus improving the stability and accuracy of welding. Combined with the electric telescopic rod and the adjustable pressing rod, it can adapt to inner shells of different sizes and shapes, enhancing the versatility of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an automotive parts welding equipment proposed in this invention; Figure 2 A schematic diagram of the outer shell and the limiting gripper structure; Figure 3 This is a schematic diagram of the support rod and inner shell structure; Figure 4 This is a schematic diagram of the gear ring and transmission gear structure. Figure 5 This is a schematic diagram showing the connection between the rotating gear and the sliding table; Figure 6 A schematic diagram showing the connection between the moving platform and the pressing rod; Figure 7 A schematic diagram showing the connection between the mobile platform and the electric telescopic pole; Figure 8 for Figure 7 Enlarged view of a portion of region A in the middle.

[0018] In the diagram: 1. Mounting base plate; 2. Mounting top plate; 3. Fixed column; 4. Lower drive component; 5. Upper drive component; 501. Drive gear; 502. Drive motor; 503. Rotary gear; 504. Transmission shaft; 505. Rotating gear; 506. Gear ring; 507. Limiting platform; 508. Fixed shaft; 6. Transmission gear; 7. Welding head; 701. Electric push rod; 702. Sliding table; 8. Mounting platform; 801. Electro-hydraulic rod; 802. Moving platform; 803. Electric telescopic rod one; 804. Pressing rod; 9. Support rod; 901. Mounting block; 902. Electric telescopic rod two; 903. Fixed block; 904. Telescopic guide rod; 905. Connecting plate; 906. Limiting plate; 10. Outer shell; 11. Inner shell; 12. Limiting gripper. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figures 1-8 An automotive parts welding device includes a fixed column 3 and a mounting base plate 1 and a mounting top plate 2 disposed at both ends of the fixed column 3. An outer shell 10 and an inner shell 11 are disposed between the mounting base plate 1 and the mounting top plate 2. The outer shell 10 and the inner shell 11 are fixed by limiting grippers 12. When the outer shell 10 and the inner shell 11 are placed on the support, the bottom ends of the outer shell 10 and the inner shell 11 are on the same horizontal plane. The limiting grippers 12 work together to clamp the outer shell 10 and the inner shell 11 to prevent the outer shell 10 and the inner shell 11 from rotating during friction welding. There are four sets of limiting grippers 12, symmetrically distributed on the upper and lower support. Each set of limiting grippers 12 has a built-in pressure sensor. The clamping force is adjusted through pressure feedback to avoid excessive clamping that causes shell deformation or excessive clamping that causes displacement.

[0021] The mounting base plate 1 and mounting top plate 2 are symmetrically arranged vertically, and the mounting base plate 1 and mounting top plate 2 are respectively provided with a lower drive component 4 and an upper drive component 5. Both the lower drive component 4 and the upper drive component 5 are provided with welding heads 7, and the rotation directions of the lower drive component 4 and the upper drive component 5 driving the welding heads 7 are opposite. The friction torque of the upper and lower welding surfaces (in opposite directions) can cancel each other out, preventing the workpiece from being twisted. The rotation speed and feed speed of the two welding heads 7 are completely synchronized, which facilitates torque balance, reduces deformation, and improves welding quality. There is no torsional vibration of the workpiece during the welding process, which can improve the coaxiality accuracy of the upper and lower welding surfaces and meet the high-precision assembly requirements of motor housing and stator or rotor. In this embodiment, the welding head 7 is a friction welding special stirring head, made of H13 hot work die steel, which is quenched and tempered to achieve a hardness of HRC48-52, ensuring wear resistance and structural stability during the welding process.

[0022] The lower drive component 4 and the upper drive component 5 include a rotating gear 503 and a drive gear 501. A transmission gear 6 is also provided in the mounting top plate 2. The transmission gear 6 is positioned between the rotating gear 503 and the drive gear 501 to change the rotation direction of the upper drive component 5.

[0023] Both the lower drive component 4 and the upper drive component 5 are provided with a gear ring 506. The gear ring 506 is provided with a limiting platform 507. The limiting platform 507 is set in the mounting top plate 2 through a fixed shaft 508. The drive gear 501 is composed of two parallel external gears, external gear one and external gear two, and external gear two and gear ring 506 are on the same plane. The internal gear module of gear ring 506 is the same as that of external gear two, ensuring that the transmission ratio is constant when rotating gear 505 meshes with both.

[0024] The welding head 7 consists of a welding head body and an electric push rod 701 mounted on the welding head body. A sliding table 702 is mounted on the upper end of the electric push rod 701, and the sliding table 702 is slidably mounted within the mounting top plate 2. A rotating gear 505 is mounted on the upper end of the sliding table 702, and the rotating gear 505 is positioned between the gear ring 506 and the second external gear, meshing with both. The electric push rod 701 is a ball screw type electric push rod with adjustable extension speed (5-20mm / s) and positioning accuracy ±0.02mm, ensuring precise control of the feed amount of the welding head 7. The outer wall of the sliding table 702 is provided with a lubrication groove containing lithium-based grease to reduce sliding resistance between the sliding table 702 and the sliding groove. The clearance between the sliding table 702 and the sliding groove is 0.03-0.05mm, balancing sliding flexibility and positioning stability.

[0025] The drive gear 501 is sleeved on the outer wall of the fixed shaft 508, and the top end of the fixed shaft 508 is rotatably installed in the mounting plate 2. The bottom end of the fixed shaft 508 has a placement groove, in which an electric hydraulic rod 801 is installed. The bottom end of the electric hydraulic rod 801 is provided with a support component, which is driven to move up or down by the electric hydraulic rod 801. The fixed shaft 508 is made of 45# steel with heat treatment, with an outer diameter of 50mm. The length is set according to the distance between the mounting plate 2 and the support component. Its top end is connected to the mounting plate 2 through a deep groove ball bearing. The bearing model is 6210, which ensures the coaxiality and smoothness of the fixed shaft 508 when rotating.

[0026] The support includes a mounting platform 8, with a movable platform 802 at its bottom. The movable platform 802 has a T-shaped columnar structure, and multiple pressing rods 804 are provided at its bottom. An electric telescopic rod 803 is provided between the pressing rods 804 and the mounting platform 8. The tilt of the pressing rods 804 is adjusted by extending and retracting the electric telescopic rod 803. When the welding head 7 moves close to the end of the pressing rod 804, the extension and retraction of the electric telescopic rod 803 pulls the pressing rod 804 to tilt. When tilted, the corresponding limit gripper 12 releases the limit on the outer shell 10 and the inner shell 11 to prevent interference during operation; four pressing rods 804 are provided, evenly distributed at the bottom of the moving platform 802, and the ends of the pressing rods 804 are provided with soft wear-resistant rubber pads (Shore hardness A70) to avoid scratches caused by hard contact with the shell surface; the extension speed of the electric telescopic rod is 10mm / s, and its extension action is limited by the limit switch to ensure that the tilt angle of the pressing rod 804 is controllable.

[0027] The pressing rod 804 consists of two sections. One section is a fixed end that is fixedly installed on the outer wall of the moving platform 802, and the other section is a rotating end that is rotatably installed on the fixed end. The rotating end is pushed to rotate by the electric telescopic rod 803 until it abuts against the end of the fixed end, so that the four pressing rods 804 are on the same plane. The connection between the rotating end and the fixed end is made of stainless steel hinges. The rotation gap of the hinges is ≤0.1mm, ensuring that the flatness error of the pressing rod 804 after unfolding is ≤0.2mm, thus ensuring the stability of the workpiece support.

[0028] Since the upper and lower welding heads 7 rotate in opposite directions, when the upper welding head 7 is placed on the far left of the outer shell 10, the lower welding head 7 is located on the far right of the outer shell 10. At this time, the limiting grippers 12 on the upper, lower, left and right sides of the outer shell 10 are all in the released state, which makes it easy for the inner shell 11 to rotate around the center. This rotational force is counteracted by the end of the support rod 9 abutting against the inner wall of the inner shell 11, preventing the distance between the inner shell 11 and the outer shell 10 from changing and preventing the friction welding quality from being affected. The end of the support rod 9 is also provided with a wear-resistant rubber head, and the surface of the rubber head is provided with anti-slip texture to increase the friction with the inner wall of the inner shell 11 and improve the limiting effect.

[0029] The bottom of the moving platform 802 is provided with a limiting component, which is located inside the inner shell 11. The limiting component and the inner wall of the inner shell 11 are in contact to vertically limit the inner shell 11. The limiting component includes multiple mounting blocks 901 set at the bottom of the moving platform 802. The multiple mounting blocks 901 are arranged in a rectangular shape. A support rod 9 is rotatably set between the mounting blocks 901. The inner shell 11 is limited by the end of the support rod 9 abutting against it. The mounting blocks 901 are fixed to the bottom of the moving platform 802 by welding. The center line of the four mounting blocks 901 forms a square. The side length is adapted to the inner diameter of the inner shell 11 to ensure that the support rod 9 can be evenly stressed after unfolding.

[0030] The moving table 802 is equipped with an electric telescopic rod 902. A fixed block 903 is located at the bottom of the electric telescopic rod 902. Multiple connecting plates 905 are mounted on the fixed block 903. A telescopic guide rod 904 is mounted on the support rod 9. The telescopic guide rod 904 is rotatably positioned between the connecting plates 905. The electric telescopic rod 902 drives the fixed block 903 to move up and down, adjusting the tilt angle of the support rod 9 until it is in contact with the inner wall of the inner housing 11. The electric telescopic rod 902 is a multi-stage electric telescopic rod, and its telescopic movement is automatically controlled by the central controller based on the inner diameter parameters of the inner housing 11, adapting to workpieces of different specifications. The telescopic guide rod 904 can compensate for the length changes of the support rod 9 during rotation, ensuring the connection stability between the connecting plate 905 and the support rod 9.

[0031] A limiting plate 906 is provided on the mounting block 901, and the limiting plate 906 is located on the side close to the electric telescopic rod 902. The rotation of the support rod 9 is limited by the limiting plate 906 and the support rod 9 abutting against each other. The limiting plate 906 is made of steel plate bent and formed and welded to the mounting block 901. A rubber buffer pad is provided at the contact point between its limiting surface and the support rod 9 to avoid wear caused by hard contact.

[0032] A drive shaft 504 is rotatably mounted between the fixed columns 3. Both ends of the drive shaft 504 extend between the mounting base plate 1 and the mounting top plate 2, and both ends of the drive shaft 504 are fixedly connected to the rotating gear 503. The drive shaft 504 is made of 40Cr alloy steel with a diameter of 40mm. Its length is set according to the distance between the mounting base plate 1 and the mounting top plate 2. Both ends are connected to the rotating gear 503 by flat keys to ensure the reliability of power transmission. The middle part of the drive shaft 504 is fixed to the fixed column 3 by a bearing seat. The bearing seat is a self-aligning roller bearing, model 22210, which can compensate for the coaxiality deviation caused by installation error.

[0033] The mounting top plate 2 is equipped with a drive motor 502, and the output end of the drive motor 502 is fixedly connected to the rotating gear 503. Both the mounting base plate 1 and the mounting top plate 2 are provided with circular sliding grooves, and the sliding table 702 is slidably disposed in the sliding grooves. The drive motor 502 is a servo motor with a power of 5.5kW, a rated speed of 3000r / min, and a speed accuracy of ±1r / min, to ensure the speed stability of the welding head 7. The inner diameter of the sliding groove is 0.05-0.1mm larger than the outer diameter of the sliding table 702, and the inner wall of the sliding groove is provided with a wear-resistant coating (material is TiN) to reduce the frictional loss when the sliding table 702 slides.

[0034] It should be noted that the specific models and specifications of electrical components such as drive motor 502, electric push rod 701, electric telescopic rod one 803, electric telescopic rod two 902, and electric hydraulic rod 801 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technology in this field, so they will not be elaborated here.

[0035] The functional principle of this invention can be explained through the following operational methods: The outer casing 10 and inner casing 11 of the motor housing to be welded are pre-treated to remove surface oil, oxide scale and other impurities to ensure that the cleanliness of the welding surface meets the requirements of the friction welding process. According to the workpiece specifications, the outer diameter of the outer casing 10, the inner diameter of the inner casing 11 and the height of the welding surface are input into the central controller and the system automatically matches the corresponding clamping and welding parameters. The outer housing 10 of the motor housing is fitted onto the outer wall of the inner housing 11, ensuring that the upper and lower end faces of both are flush. The assembled housing is then placed vertically on the pressing rod 804. The electric hydraulic rod 801 is activated to adjust the distance between the two support members, so that the pressing rod 804 of the upper and lower support members is in contact with the upper and lower end faces of the outer housing 10, respectively. The limit gripper 12 is activated to limit and clamp the upper and lower ends of the outer housing 10 and the inner housing 11. The pressure sensor provides real-time feedback of the clamping force data to ensure reliable clamping. Activate the electric telescopic rod 902 and pull the fixing block 903 upward, so that the connecting plate 905 pulls the telescopic guide rod 904 to move, thereby driving the support rod 9 to rotate around the mounting block 901 until the end of the support rod 9 abuts against the inner wall of the inner shell 11, the electric telescopic rod 902 stops moving, and the inner limit fixation is completed. Turn on the drive motor 502, causing the output of the drive motor 502 to drive the rotating gear 503 to rotate. The rotating gear 503 in the mounting top plate 2 drives the transmission gear 6 to rotate, and the transmission gear 6 drives the drive gear 501 to rotate in the same direction as the rotating gear 503. At the same time, the rotating gear 503 drives the rotating gear 503 in the mounting base plate 1 to rotate synchronously through the transmission shaft 504. The rotating gear 503 in the mounting base plate 1 directly drives the drive gear 501 to rotate, ultimately causing the lower drive component 4 and the upper drive component 5 to drive the welding head 7 in opposite directions (clockwise at the upper end and counterclockwise at the lower end). When the drive gear 501 rotates, it drives the rotating gear 505 to revolve around the gear ring 506 through the external gear 2. At the same time, the rotating gear 505 rotates on its own axis, which in turn drives the sliding table 702 to make circumferential motion along the sliding groove. The electric push rod 701 is activated to push the welding head 7 to feed towards the welding surface and apply the preset welding pressure. Through frictional heat generation, the welding surface material reaches a plastic state, and the welding is completed. During the welding process, the rotation speed and feed speed of the upper and lower welding heads 7 are completely synchronized to ensure uniform welding quality. After welding is completed, the electric push rod 701 drives the welding head 7 to retract, the drive motor 502 stops rotating, the electric telescopic rod 803 pulls the pressing rod 804 to tilt, the limit gripper 12 releases its clamp, the electric telescopic rod 902 drives the fixing block 903 to move down, the support rod 9 resets, the electric hydraulic rod 801 drives the upper support to move up, and the operator takes out the welded workpiece.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automotive parts welding apparatus characterized by comprising: The utility model relates to a kind of fixed column (3) and the installation bottom plate (1) and installation top plate (2) of setting in fixed column (3) both ends, and installation bottom plate (1) and installation top plate (2) between setting have outer shell (10) and inner shell (11), the outer shell (10) and the inner shell (11) are fixed by limiting gripper (12). The installation bottom plate (1) and the installation top plate (2) are symmetrically arranged, and a lower driving element (4) and an upper driving element (5) are respectively arranged in the installation bottom plate (1) and the installation top plate (2), the lower driving element (4) and the upper driving element (5) are provided with a welding head (7), and the rotation directions of the lower driving element (4) and the upper driving element (5) are opposite. The lower driving element (4) and the upper driving element (5) include a rotating gear (503) and a driving gear (501), and a transmission gear (6) is further arranged in the installation top plate (2) and disposed between the rotating gear (503) and the driving gear (501), so as to change the rotation directions of the lower driving element (4) and the upper driving element (5).

2. The apparatus of claim 1, wherein, The lower driving element (4) and the upper driving element (5) are provided with a gear ring (506), the gear ring (506) is provided with a limiting table (507), the limiting table (507) is fixedly connected by being arranged in the installation top plate (2) through a fixed shaft (508), the driving gear (501) is composed of two parallel outer gears, and the second outer gear and the gear ring (506) are in the same plane.

3. The apparatus of claim 1, wherein, The welding head (7) is composed of a welding head body and an electric push rod (701) arranged on the welding head body, the electric push rod (701) is provided with a sliding table (702) at the upper end, and the sliding table (702) is slidingly arranged in the installation top plate (2), the sliding table (702) is provided with a rotating gear (505) at the upper end, and the rotating gear (505) is arranged between the gear ring (506) and the second outer gear and is in meshing connection with the gear ring (506) and the second outer gear.

4. The apparatus of claim 2, wherein, The driving gear (501) is sleeved on the outer wall of the fixed shaft (508), and the top end of the fixed shaft (508) is rotatably arranged in the installation top plate (2), the bottom end of the fixed shaft (508) is provided with a placing groove, the placing groove is provided with an electric hydraulic rod (801), the bottom end of the electric hydraulic rod (801) is provided with a supporting element, and the supporting element is driven to move upward or downward by the electric hydraulic rod (801).

5. The apparatus of claim 4 wherein, The supporting element includes a mounting table (8), the mounting table (8) is provided with a moving table (802) at the bottom end, the moving table (802) is a T-shaped column structure, the moving table (802) is provided with a plurality of pressing rods (804) at the bottom end, and the electric telescopic rod one (803) is arranged between the pressing rod (804) and the mounting table (8), and the inclination of the pressing rod (804) is adjusted by the telescopic adjustment of the electric telescopic rod one (803).

6. The apparatus of claim 5, wherein, The bottom end of the moving table (802) is provided with a limiting element, and the limiting element is arranged in the inner shell (11), and the inner shell (11) is vertically limited by the close contact between the limiting element and the inner wall of the inner shell (11). The limiting piece comprises a plurality of mounting blocks (901) arranged at the bottom end of the moving table (802), and the mounting blocks (901) are arranged in a rectangular shape, and a support rod (9) is rotatably arranged between the mounting blocks (901), and the inner shell (11) is limited by abutting the end of the support rod (9) and the inner shell (11).

7. The vehicle component welding apparatus of claim 6, wherein, The moving table (802) is provided with a second electric telescopic rod (902), the bottom end of the second electric telescopic rod (902) is provided with a fixed block (903), a plurality of connecting plates (905) are arranged on the fixed block (903), a telescopic guide rod (904) is arranged on the support rod (9), the telescopic guide rod (904) is rotatably arranged between the connecting plates (905), and the fixed block (903) is driven to move up and down by the second electric telescopic rod (902), so as to adjust the inclination angle of the support rod (9) until the inner wall of the inner shell (11) is attached.

8. The apparatus of claim 6 wherein, The mounting block (901) is provided with a limiting plate (906), and the limiting plate (906) is arranged on the side close to the second electric telescopic rod (902), and the rotation of the support rod (9) is limited by abutting the limiting plate (906) and the support rod (9).

9. The apparatus of claim 1, wherein the apparatus is a vehicle component welding apparatus. The fixed column (3) is rotatably provided with a transmission shaft (504), the transmission shaft (504) extends between the mounting bottom plate (1) and the mounting top plate (2) at both ends, and the transmission shaft (504) is fixedly connected with the rotating gear (503) at both ends.

10. The vehicle component welding apparatus of claim 3, wherein, The mounting top plate (2) is provided with a driving motor (502), the output end of the driving motor (502) is fixedly connected with the rotating gear (503), and the mounting bottom plate (1) and the mounting top plate (2) are both provided with a circular sliding groove, and the sliding table (702) is slidably arranged in the sliding groove.

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