Folding bicycle frame welding device and welding method

Abstract

The invention provides a folding bicycle frame welding device and method, and belongs to the technical field of frame welding, the folding bicycle frame welding device and method comprise a supporting frame and two moving tables connected to the supporting frame in a sliding mode, and further comprise an adjusting mechanism, the adjusting mechanism comprises a moving part, a frame placing part and a frame, and the moving part is connected with the frame placing part; wherein the frame is connected to the frame placing component; the moving part comprises two groups of mounting seats, a screw rod, a screw rod nut, a connecting block and an adjusting assembly; according to the device, through cooperative work of a motor, a lead screw, gear chain transmission, a second gear, a third gear and the like and a robot arm, high automation of position adjustment of the movable table, clamping and fixing of the frame, welding path planning and paint spraying treatment is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of frame welding, and particularly relates to a welding device and a welding method for a folding bicycle frame. Background Art

[0002] Traditional bicycle frame welding typically relies on manual labor, which is not only labor-intensive but also requires high worker skills. Furthermore, manual welding is susceptible to human error, resulting in inconsistent weld quality. Existing fixture systems often lack flexibility and struggle to adapt to frames of varying sizes and shapes. This is especially true when handling multiple models of folding bicycles, requiring frequent fixture changes or adjustments, increasing production setup time. Summary of the Invention

[0003] The purpose of the present invention is to provide a folding bicycle frame welding device and welding method, aiming to solve the problems of low manual welding efficiency, inflexible clamp system and insufficient automation in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A folding bicycle frame welding device includes: a support frame and two movable platforms slidably connected thereto, and further includes:

[0006] The adjustment mechanism includes a moving part, a frame placement part and a frame, wherein:

[0007] The frame is connected to the frame placement component;

[0008] The movable parts include two groups of mounting seats, screw rods, screw rod nuts, connecting blocks and adjustment components. The two groups of mounting seats are respectively fixedly connected to the lower inner wall of the support frame, the two groups of screw rods are respectively rotatably connected to the two groups of mounting seats, the two groups of screw rod nuts are respectively fixedly connected to the circumferential surfaces of the two groups of screw rods, the two groups of connecting blocks are respectively fixedly connected to the upper ends of the two groups of screw rod nuts, the two groups of connecting blocks are respectively connected to the two groups of moving platforms, and the adjustment component is arranged at the side end of the support frame to realize adjustment between the two groups of screw rods;

[0009] The frame placement component includes a lifting assembly, a cross frame, a first slide, a first fixed frame, a second adjustment block, a third adjustment block, a fourth fixed frame and a fifth fixed frame, the cross frame is fixedly connected to the upper end of the lifting assembly, the first slide is opened at the side end of the cross frame, the first fixed frame is fixedly connected to the side end of the cross frame, the second adjustment block is slidably connected to the side end of the first slide, the third adjustment block is slidably connected to the side end of the first slide, the fourth fixed frame is rotatably connected to the side end of the third adjustment block, and the fifth fixed frame is fixedly connected to the side end of the third adjustment block.

[0010] As a preferred solution of the present invention, the adjusting assembly includes two first gears, a cross slide, a round rod, a cross block, a limit block, a first chain, a first electric telescopic rod, a connecting plate and a spring, the two first gears are respectively fixedly connected to the side ends of the two screw rods, the cross slide is opened at the side end of one of the first gears, the round rod is fixedly connected to the side end of one of the screw rods, the cross block is fixedly connected to the side end of the round rod, the limit block is fixedly connected to the side end of the cross block, the cross slide matches the cross block, the first chain meshes and rotates to be connected to the circumferential surface of the two first gears, the first electric telescopic rod is fixedly connected to the side end of the support frame, the connecting plate is fixedly connected to the output end of the first electric telescopic rod, the side end of the connecting plate is fixed to the first gear, and the connecting plate is slidably connected to the round rod, and the spring is sleeved and connected to the circumferential surface of the output end of the first electric telescopic rod.

[0011] As a preferred solution of the present invention, the side end of one of the screw rods is fixedly connected to the third gear, the side end of the support frame is fixedly connected to the motor, the output end of the motor is fixedly connected to the second gear, and the second gear and the third gear are meshed and rotatably connected with a second chain.

[0012] As a preferred solution of the present invention, the first fixing frame further includes a second slide groove, a first adjusting block, a second fixing frame, a third slide groove, two first L-shaped clamping plates, two first clamping protrusions and an arc-shaped limiting frame, the second slide groove is opened at the side end of the first fixing frame, the first adjusting block is slidably connected to the side end of the second slide groove, the second fixing frame is rotatably connected to the side end of the first adjusting block, the third slide groove is opened at the side end of the second fixing frame, the two first L-shaped clamping plates are respectively slidably connected to the side ends of the third slide groove, the two first clamping protrusions are respectively threadedly connected to the side ends of the two first L-shaped clamping plates by bolts, the arc-shaped limiting frame is fixedly connected to the side ends of the second fixing frame, and the arc-shaped limiting frame is threadedly connected to the first adjusting block by bolts.

[0013] As a preferred solution of the present invention, the second adjustment block also includes a third fixing frame, a fourth slide groove, a placement frame, and a round rod. The third fixing frame is fixedly connected to the side end of the second adjustment block, the fourth slide groove is opened at the side end of the third fixing frame, the placement frame is slidably connected to the side end of the fourth slide groove, and the round rod is threadedly connected to the side end of the placement frame by a bolt.

[0014] As a preferred solution of the present invention, the fourth fixing frame also includes a fifth slide groove, a second L-shaped clamping plate, a second clamping protrusion and a light rod, the fifth slide groove is opened at the side end of the fourth fixing frame, the second L-shaped clamping plate is slidably connected to the side end of the fifth slide groove, the second clamping protrusion is threadedly connected to the side end of the second L-shaped clamping plate by a bolt, and the light rod is fixedly connected to the side end of the fourth fixing frame.

[0015] As a preferred solution of the present invention, the fifth fixed frame also includes a sixth slide groove, two fourth adjustment blocks and two elastic clamps, the sixth slide groove is opened at the side end of the fifth fixed frame, the two fourth adjustment blocks are respectively slidably connected to the upper and lower ends of the sixth slide groove, and the two elastic clamps are respectively fixedly connected to the side ends of the two fourth adjustment blocks.

[0016] As a preferred solution of the present invention, the lifting assembly includes a base plate, a lifting frame, an upper plate and a first electric telescopic rod. The base plate is fixedly connected to the upper end of the mobile platform, the lifting frame is connected to the base plate, the upper plate is connected to the upper end of the lifting frame, and the first electric telescopic rod is rotatably connected between the base plate and the lifting frame through a rotating shaft.

[0017] As a preferred solution of the present invention, the lower end of the support frame is fixedly connected to the base, the left and right sides of the upper end of the base are respectively fixedly connected to slide rails, the two slide rails are connected to mounting platforms, the upper ends of the two mounting platforms are fixedly connected to robot arms, the side end of one of the robot arms is connected to a welding device, and the side end of the other robot arm is connected to a painting device.

[0018] A welding method for a folding bicycle frame welding device comprises the following steps:

[0019] S1: Equipment initialization and adjustment: Start the device and check whether the supporting frame, movable platform, screw rod, cross frame, first fixed frame, second adjustment block, third adjustment block, fourth fixed frame, fifth fixed frame and other components are in normal working condition; use the adjustment component to synchronously adjust the two sets of screw rods to ensure that the movable platform can slide smoothly to the specified position; use the lifting component to adjust the height of the cross frame to adapt it to the size of the frame to be welded and the welding requirements;

[0020] S2: The frame is placed and fixed: Small frame fixing mode: four small frames are placed on four frame placement components respectively, specifically: two small frames are fixed on the first fixing frame and the fourth fixing frame respectively, and are clamped and fixed by the first L-shaped clamping plate, the first clamping protrusion, the arc-shaped limiting frame, the second L-shaped clamping plate, the second clamping protrusion and other components; the other two small frames are fixed on the placement frame on the second adjustment block and the elastic clamping claw on the fifth fixing frame respectively, to ensure that the frame remains stable during the welding process; by adjusting the positions of each slide, the second slide, the fourth slide, the fifth slide, and the sixth slide, ensure that the four The spacing between the small frames is moderate to avoid mutual interference during welding; large frame fixing mode; the two ends of a large frame are placed on two sets of frame placement components respectively, specifically: one end of the frame is fixed on the first fixing frame and the fourth fixing frame, and the other end is fixed on the second adjustment block and the fifth fixing frame; the movement of the two sets of screw rods is controlled by the adjustment component to make the two sets of frame placement components close to each other to adapt to the length of the large frame, and the adjustment is achieved through the cooperation of the first chain and the motor; the large frame is firmly fixed by various clamping components, the second L-shaped clamping plate, the elastic clamping claws, etc. to ensure stability during the welding process;

[0021] S3: Welding path planning and execution: Small frame welding mode: According to the welding requirements of four small frames, two sets of robotic arms respectively drive the welding device and the painting device to perform path planning, determine the welding points and welding sequence of each frame; start the welding device to synchronously weld the welding points of the four frames, and at the same time use the painting device to immediately spray the completed welded parts for protection; monitor the welding quality in real time, and fine-tune the position of the frame by adjusting the components when necessary to ensure the welding requirements; Large frame welding mode: According to the welding requirements of large frames, two sets of robotic arms work together: one set of robotic arms drives the welding device to weld one side of the frame, and the other set of robotic arms drives the painting device to spray the welded part on the other side for protection; or the two sets of robotic arms perform welding operations at the same time, each responsible for different welding areas of the frame, to improve welding efficiency; during the welding process, the positions of the components of the two sets of frames are adjusted in real time by adjusting the components to ensure that the welding path covers the entire frame;

[0022] S4: Post-welding processing and equipment reset: After welding is completed, loosen all clamping parts, the second L-shaped clamping plate, elastic clamping claws, etc., and remove the frame; clean and maintain the welding device and painting device to ensure the long-term stable operation of the equipment; reset the movable table and cross frame to the initial position, turn off the power, and complete the entire welding process.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This solution utilizes a motor, screw, gear chain drive, secondary and tertiary gears, and robotic arms to achieve highly automated positioning of the mobile platform, frame clamping, welding path planning, and painting. The welding and painting units are operated independently or collaboratively by two sets of robotic arms, enabling simultaneous welding of multiple small frames or sectioned welding of a single large frame, significantly improving production efficiency.

[0025] 2. In this solution, the frame mounting components are equipped with various slides, secondary and quaternary slides, adjustment blocks, and clamping mechanisms such as elastic clamps and L-shaped clamps, enabling flexible adjustment and secure fixation of frames of varying sizes and shapes. The adjustable functions of the lifting assembly and mobile platform allow for precise adjustment of the crossbar height and position. Combined with the precise control of the robotic arm, this ensures accurate positioning of welding points and painting areas.

[0026] 3. In this solution, the cross slot and cross block of the device, the detachable design of the bolt connection, and the first clamping protrusion facilitate maintenance and replacement. The spring buffer design and the limiting function of the limit block enhance the stability and safety of the equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 A perspective view of the present invention;

[0029] Figure 2 An exploded view of the present invention;

[0030] Figure 3 For the present invention Figure 2 Exploded view of the middle support frame;

[0031] Figure 4 For the present invention Figure 3 Exploded view of the middle support frame;

[0032] Figure 5 For the present invention Figure 4 Enlarged view of the middle screw;

[0033] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0034] Figure 7 For the present invention Figure 3 Exploded view of the midsole plate;

[0035] Figure 8 For the present invention Figure 7A magnified view of the midsole plate;

[0036] Figure 9 For the present invention Figure 8 Exploded view of the midsole plate;

[0037] Figure 10 For the present invention Figure 7 Exploded view of the middle cross frame;

[0038] Figure 11 For the present invention Figure 10 Exploded view of the middle cross frame.

[0039] In the figure: 1. Support frame; 101. Moving platform; 102. Mounting seat; 103. Screw; 104. Screw nut; 105. Connecting block; 106. First gear; 1061. Cross slide; 1062. Limit block; 1063. Round rod; 1064. Cross block; 107. First chain; 108. Motor; 109. Second gear; 110. Third gear; 111. Second chain; 2. First electric telescopic rod; 201. Connecting plate; 202. Spring; 3. Bottom plate; 301. Lifting frame; 302. Upper plate; 303. First electric telescopic rod; 4. Horizontal frame; 401. First slide; 5. First fixing frame; 501. Second slide; 502. First adjustment Block; 503, second fixing frame; 504, third slide; 505, first L-shaped clamping plate; 506, first clamping protrusion; 507, arc-shaped limiting frame; 6, second adjusting block; 601, third fixing frame; 602, fourth slide; 603, placement rack; 604, round rod; 7, third adjusting block; 8, fourth fixing frame; 801, fifth slide; 802, second L-shaped clamping plate; 803, second clamping protrusion; 804, polished rod; 9, fifth fixing frame; 901, sixth slide; 902, fourth adjusting block; 903, elastic clamping claw; 10, frame; 11, base; 12, slide rail; 13, mounting table; 14, robot arm; 15, welding device; 16, painting device. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] Example 1

[0044] See also Figure 1-11 , the present invention provides the following technical solutions:

[0045] A folding bicycle frame welding device includes: a support frame 1 and two movable platforms 101 slidably connected thereto, and further includes:

[0046] The adjustment mechanism includes a moving part, a frame placement part and a frame 10, wherein:

[0047] The frame 10 is connected to the frame placement component;

[0048] The moving parts include two sets of mounting seats 102, screw rods 103, screw rod nuts 104, connecting blocks 105 and adjustment components. The two sets of mounting seats 102 are respectively fixedly connected to the lower inner wall of the support frame 1, the two sets of screw rods 103 are respectively rotatably connected to the two sets of mounting seats 102, the two sets of screw rod nuts 104 are respectively fixedly connected to the circumferential surfaces of the two sets of screw rods 103, the two sets of connecting blocks 105 are respectively fixedly connected to the upper ends of the two sets of screw rod nuts 104, the two sets of connecting blocks 105 are respectively connected to the two sets of moving platforms 101, and the adjustment component is provided at the side end of the support frame 1 to realize the adjustment between the two sets of screw rods 103;

[0049] The frame placement components include a lifting assembly, a cross frame 4, a first slide 401, a first fixed frame 5, a second adjusting block 6, a third adjusting block 7, a fourth fixed frame 8 and a fifth fixed frame 9. The cross frame 4 is fixedly connected to the upper end of the lifting assembly, the first slide 401 is opened at the side end of the cross frame 4, the first fixed frame 5 is fixedly connected to the side end of the cross frame 4, the second adjusting block 6 is slidably connected to the side end of the first slide 401, the third adjusting block 7 is slidably connected to the side end of the first slide 401, the fourth fixed frame 8 is rotatably connected to the side end of the third adjusting block 7, and the fifth fixed frame 9 is fixedly connected to the side end of the third adjusting block 7.

[0050] In a specific embodiment of the present invention, the support frame 1 serves as the basic support structure for the entire device, providing a stable working platform. It ensures the overall rigidity and stability of the device, preventing degradation of welding accuracy due to vibration or external forces. It also provides space and a base for installing other components. Through fixed connections, the support frame 1 provides a mounting base for the movable platform 101, the adjustment mechanism, and the frame mounting components, ensuring coordinated operation among these components. The movable platform 101 is used to carry and secure certain components of the frame and can slide along the support frame. It can accommodate frames of varying sizes, enhancing the versatility of the device. The sliding function facilitates adjustment of the frame position, reducing manual handling and repositioning time. The movable platform 101 is connected to the screw nut 104 via a connecting block 105, enabling sliding adjustment driven by the screw 103. The adjustment mechanism mounting base 102 provides a mounting location for the screw 103 and ensures its rotational stability. This improves the rotation of the screw 103 and prevents wobble or misalignment. The mounting base 102 is fixed to the support frame 1, providing a stable support point for the screw 103. The screw 103 converts rotational displacement into linear displacement through rotational motion. The linear displacement control is achieved to facilitate the adjustment of the position of the movable platform 101. The screw rod 103 is mounted on the mounting base 102 by a rotational connection and cooperates with the screw nut 104 to drive the movable platform 101 to slide. The screw nut 104 cooperates with the screw rod 103 to convert the rotational motion into linear motion. It provides efficient transmission efficiency and ensures the smooth sliding of the movable platform 101. The screw nut 104 is connected to the connecting block 105 by a fixed connection to transmit the displacement to the movable platform 101. The connecting block 105 connects the screw nut 104 and the movable platform 101 to transmit the displacement. It ensures the stability of the displacement transmission and avoids looseness or error accumulation. The connecting block 105 is fixedly connected to the screw nut 104 and the movable platform 101 respectively to form a transmission chain. The adjustment component controls the rotation of the screw rod 103 to adjust the position of the movable platform 101. It provides an automatic adjustment method to make the operation more convenient. The adjustment component is arranged at the side end of the support frame 1 and is linked with the screw rod 103 to drive the entire adjustment mechanism to work. The lifting assembly adjusts the height of the cross frame 4. It adapts to different welding height requirements and improves operational flexibility. The lifting assembly is fixedly connected to the cross frame 4, driving the entire frame to lift and lower the components. The cross frame 4 serves as the main support structure for the frame components. It provides stable support and installation space, which is convenient for arranging the first slide 401 and other clamping components. The cross frame 4 is fixedly connected to the lifting assembly and cooperates with other components through the first slide 401. The first slide 401 provides a sliding track for the second adjustment block 6 and the third adjustment block 7. The adjustment blocks are allowed to slide freely to adapt to frames of different lengths. The first slide 401 is opened at the side end of the cross frame 4, providing a sliding path for the second adjustment block 6 and the third adjustment block 7. The first fixed frame 5 fixes a part of the frame. It prevents the frame from shifting during the welding process. The first fixed frame 5 is fixed to the side end of the cross frame 4, contacts and clamps the frame.The second adjustment block 6 and the third adjustment block 7 slide along the first slide groove 401 and are used to clamp different parts of the frame. The clamping position can be flexibly adjusted to accommodate frames of different sizes and shapes. The second adjustment block 6 and the third adjustment block 7 are slidably connected to the first slide groove 401, contacting and clamping the frame. The fourth fixing frame 8 adjusts the angle by a rotational connection and is used to fix a specific part of the frame. It provides an angle adjustment function and enhances clamping flexibility. The fourth fixing frame 8 is rotationally connected to the side end of the third adjustment block 7, contacting and clamping the frame. The fifth fixing frame 9 fixes part of the frame. It enhances the overall stability of the frame and prevents shaking during welding. The fifth fixing frame 9 is fixedly connected to the side end of the third adjustment block 7, contacting and clamping the frame.

[0051] For details, please refer to Figure 1-11 The adjustment assembly includes two first gears 106, a cross slot 1061, a round rod 1063, a cross block 1064, a limit block 1062, a first chain 107, a first electric telescopic rod 2, a connecting plate 201 and a spring 202. The two first gears 106 are respectively fixedly connected to the side ends of the two screw rods 103, the cross slot 1061 is opened at the side end of one of the first gears 106, the round rod 1063 is fixedly connected to the side end of one of the screw rods 103, the cross block 1064 is fixedly connected to the side end of the round rod 1063, and the limit block 1062 is fixedly connected to the side end of the cross block 1064, the cross slide 1061 matches the cross block 1064, the first chain 107 is engaged and rotated to be connected to the circumferential surface of the two first gears 106, the first electric telescopic rod 2 is fixedly connected to the side end of the support frame 1, the connecting plate 201 is fixedly connected to the output end of the first electric telescopic rod 2, the side end of the connecting plate 201 is fixed to the first gear 106, and the connecting plate 201 is slidably connected to the round rod 1063, and the spring 202 is sleeved and connected to the circumferential surface of the output end of the first electric telescopic rod 2.

[0052] In this embodiment, the first gear 106 transmits the rotational motion of the screw rod 103 to the first chain 107, and the chain realizes the linkage between the two screw rods 103. This ensures the synchronization of the two screw rods 103 and avoids the position inconsistency of the movable platform 101 due to errors. A cross slot 1061 is provided at the side end of one of the first gears 106 to accommodate a cross block 1064. The cross block 1064 is fixed to the side end of the round rod 1063 and can slide within the cross slot 1061 to achieve relative displacement between the first gear 106 and the round rod 1063. The first gear 106 is allowed to disengage or engage with the chain within a certain range, which facilitates the flexibility of the adjustment component. A limit function is provided to prevent the first gear 106 from excessive movement. The round rod 1063 serves as a support structure for the cross block 1064 and is slidably connected to the connecting plate 201. It provides stable support to ensure smooth sliding of the cross block 1064. The connecting plate 201 is allowed to slide on the round rod 1063 to adapt to the position changes of the first gear 106. The limit block 1062 is fixed to the side end of the cross block 1064, limiting the sliding range of the cross block 1064 within the cross slot 1061. This prevents the cross block 1064 from disengaging the cross slot 1061, thereby improving the safety and stability of the device. The limit block 1062 ensures the meshing of the first gear 106 with the chain. The first chain 107 meshes and rotates with the circumferential surface of the two first gears 106, achieving synchronous or asynchronous rotation between the two screw rods 103. This provides an efficient transmission method to ensure the coordinated operation of the two screw rods 103. The first electric telescopic rod 2 drives the connecting plate 201 to move through the telescopic action, thereby controlling the engagement or disengagement of the first gear 106 with the chain. This achieves automated adjustment and reduces manual intervention. The connecting plate 201 is fixedly connected to the output end of the first electric telescopic rod 2 and is fixed to the first gear 106. It is also slidably connected to the round rod 1063. The telescopic action of the first electric telescopic rod 2 is transmitted to the first gear 106, achieving chain meshing control. The sliding connection design improves the flexibility of adjustment. Spring 202 is mounted on the circumferential surface of the output end of the first telescopic rod 2, providing both a buffer and a reset function. It mitigates the impact of extending and retracting the first telescopic rod 2, protecting the device from damage. It also assists in retracting the first telescopic rod 2, ensuring that the connecting plate 201 quickly returns to its initial position.

[0053] For details, please refer to Figure 1-11 The side end of one of the screw rods 103 is fixedly connected to the third gear 110, the side end of the support frame 1 is fixedly connected to the motor 108, the output end of the motor 108 is fixedly connected to the second gear 109, and the second gear 109 and the third gear 110 are meshed and rotated with a second chain 111.

[0054] In this embodiment, the third gear 110 is fixedly connected to the side end of one of the screw rods 103, serving as a key node for power transmission. Through meshing and rotational connection with the second chain 111, the power of the motor 108 is efficiently transmitted to the screw rod 103, achieving automated rotation control. The motor 108 is mounted on the side end of the support frame 1 and provides driving power. This provides a stable and controllable power source for the entire adjustment mechanism, allowing for precise control of the rotation of the screw rod 103, thereby achieving automatic adjustment of the position of the movable platform 101. The second gear 109 is fixedly connected to the output end of the motor 108, receiving the motor's power and transmitting it to the second chain 111. By meshing with the second chain 111, the rotational motion of the motor 108 is effectively converted into the rotational motion of the screw rod 103, ensuring transmission efficiency. The second chain 111 connects the second gear 109 and the third gear 110, enabling power transmission between them. This provides a flexible and reliable transmission method that allows for a certain amount of installation error and can effectively absorb vibration, ensuring smooth power transmission. The output end of motor 108 is directly fixedly connected to second gear 109. This direct connection simplifies the structural design, reduces energy loss, and improves transmission efficiency. Second gear 109 is meshed and rotationally connected to third gear 110 via second chain 111. Third gear 110 is fixedly connected to the side end of one of the screw rods 103. This ensures that the rotational torque provided by motor 108 is accurately transmitted to screw rod 103, thereby driving the sliding of movable platform 101 to achieve the purpose of positioning.

[0055] For details, please refer to Figure 1-11 The first fixing frame 5 also includes a second slide groove 501, a first adjusting block 502, a second fixing frame 503, a third slide groove 504, two first L-shaped clamping plates 505, two first clamping protrusions 506 and an arc-shaped limiting frame 507. The second slide groove 501 is opened at the side end of the first fixing frame 5, the first adjusting block 502 is slidably connected to the side end of the second slide groove 501, the second fixing frame 503 is rotatably connected to the side end of the first adjusting block 502, the third slide groove 504 is opened at the side end of the second fixing frame 503, the two first L-shaped clamping plates 505 are respectively slidably connected to the side ends of the third slide groove 504, the two first clamping protrusions 506 are respectively threadedly connected to the side ends of the two first L-shaped clamping plates 505 by bolts, the arc-shaped limiting frame 507 is fixedly connected to the side end of the second fixing frame 503, and the arc-shaped limiting frame 507 is threadedly connected to the first adjusting block 502 by bolts.

[0056] In this embodiment: the second chute 501 and the first adjustment block 502 are slidably connected to the side end of the second chute 501. The first adjustment block 502 is slidably connected to the side end of the second chute 501. Horizontal adjustment of the clamping position is achieved to accommodate vehicle frames of different sizes. The second fixed frame 503 is rotatably connected to the side end of the first adjustment block 502. The clamping angle is adjusted by the rotational connection, enhancing the flexibility of clamping. The third chute 504 is opened at the side end of the second fixed frame 503. A sliding track is provided for the first L-shaped clamping plate 505 to adjust the clamping width. The two first L-shaped clamping plates 505 are slidably connected to the side ends of the third chute 504 respectively. Flexible adjustment of the clamping width is achieved to accommodate vehicle frames of different sizes. The first L-shaped clamping plate 505 and the first clamping protrusion 506 are threadedly connected to the side end of the first L-shaped clamping plate 505 by bolts. Direct contact and clamping of the vehicle frame is prevented from sliding, thereby improving clamping stability. The arc-shaped limiting frame 507 is fixedly connected to the side end of the second fixing frame 503 and is threadedly connected to the first adjustment block 502 through bolts. It provides an arc-shaped limiting function, fits the surface of the frame, and enhances the clamping of the frame.

[0057] For details, please refer to Figure 1-11 The second adjustment block 6 also includes a third fixing frame 601, a fourth slide groove 602, a placement frame 603, and a round rod 604. The third fixing frame 601 is fixedly connected to the side end of the second adjustment block 6, the fourth slide groove 602 is opened at the side end of the third fixing frame 601, the placement frame 603 is slidably connected to the side end of the fourth slide groove 602, and the round rod 604 is threadedly connected to the side end of the placement frame 603 by a bolt.

[0058] In this embodiment, the support frame 603 is slidably connected to the fourth chute 602 and is used to carry and support specific parts of the vehicle frame. This sliding design enhances the device's flexibility, allowing adjustment to the specific position of the vehicle frame. It also provides a stable support surface to prevent displacement or shaking during the welding process. Round rods 604 are threadedly connected to the side ends of the support frame 603 via bolts, directly contacting and supporting the vehicle frame. The round rod design better conforms to curved or other complex surfaces of the vehicle frame, enhancing support effectiveness. The bolted connection facilitates disassembly and replacement, extending service life and improving maintenance convenience. The third fixing frame 601 is fixedly connected to the side end of the second adjustment block 6. It provides a mounting base for subsequent components and transmits the sliding function of the second adjustment block 6 to the third fixing frame 601. The fourth chute 602 is provided on the side end of the third fixing frame 601, providing a sliding track for the support frame 603, enabling flexible adjustment of the support position. The support frame 603 is slidably connected to the side end of the fourth chute 602, allowing the position of the support frame 603 to be adjusted to accommodate vehicle frames of varying sizes and shapes. The round rod 604 is threadedly connected to the side end of the placement frame 603 by bolts, directly contacting and supporting the frame, providing a stable support point to prevent the frame from shifting during the welding process.

[0059] For details, please refer to Figure 1-11 The fourth fixing frame 8 also includes a fifth slide groove 801, a second L-shaped clamping plate 802, a second clamping protrusion 803 and a light rod 804. The fifth slide groove 801 is opened at the side end of the fourth fixing frame 8, the second L-shaped clamping plate 802 is slidably connected to the side end of the fifth slide groove 801, the second clamping protrusion 803 is threadedly connected to the side end of the second L-shaped clamping plate 802 by a bolt, and the light rod 804 is fixedly connected to the side end of the fourth fixing frame 8.

[0060] In this embodiment, a fifth slot 801 is provided at the side of the fourth fixed frame 8, providing a sliding track for the second L-shaped clamping plate 802. This allows the second L-shaped clamping plate 802 to slide along the fifth slot 801, thereby adjusting the clamping position to accommodate frames of varying sizes. This provides a stable sliding path, reduces operational errors, and ensures a smooth clamping process. The second L-shaped clamping plate 802 is slidably connected to the fifth slot 801, clamping a specific portion of the frame. The L-shaped design provides a larger contact area, enhancing clamping stability. The sliding connection facilitates adjustment of the clamping position to meet various requirements. A second clamping protrusion 803 is threadedly connected to the side of the second L-shaped clamping plate 802 via a bolt, directly contacting and clamping the frame. The protrusion design increases friction during clamping, preventing the frame from slipping. The detachable design facilitates replacement and maintenance, extending service life. A light rod 804 is fixedly connected to the side of the fourth fixed frame 8 for auxiliary clamping or position limiting. This provides an additional support point or position limiting function, enhancing clamping stability. The fifth chute 801 is formed at the side of the fourth fixed frame 8. It provides a sliding track for the second L-shaped clamping plate 802, enabling flexible adjustment of the clamping position. The second L-shaped clamping plate 802 is slidably connected to the side of the fifth chute 801. This allows adjustment of the clamping width to accommodate vehicle frames of different sizes. The second clamping protrusion 803 is threadedly connected to the side of the second L-shaped clamping plate 802 via a bolt. This directly contacts and clamps the vehicle frame, preventing slippage and improving clamping stability. The light rod 804 is fixedly connected to the side of the fourth fixed frame 8. It provides auxiliary support or a limit function.

[0061] For details, please refer to Figure 1-11 The fifth fixing frame 9 also includes a sixth slide groove 901, two fourth adjustment blocks 902 and two elastic clamps 903. The sixth slide groove 901 is opened at the side end of the fifth fixing frame 9, and the two fourth adjustment blocks 902 are respectively slidably connected to the upper and lower ends of the sixth slide groove 901, and the two elastic clamps 903 are respectively fixedly connected to the side ends of the two fourth adjustment blocks 902.

[0062] In this embodiment, a sixth chute 901 is provided at the side of the fifth fixed frame 9, providing a sliding track for the two fourth adjustment blocks 902. The two fourth adjustment blocks 902 can slide up and down along the sixth chute 901, adjusting the clamping position to accommodate frames of varying sizes. This provides a stable sliding path, ensuring a smooth and precise clamping process. The fourth adjustment blocks 902 are slidably connected to the upper and lower ends of the sixth chute 901, respectively, to support and adjust the position of the elastic clamping jaws 903. This sliding design enhances the flexibility of the device, enabling rapid adjustment based on the specific position of the frame. This sliding fit allows for precise control of the clamping width to meet diverse requirements. The elastic clamping jaws 903 are fixedly connected to the side ends of the two fourth adjustment blocks 902, respectively, for direct contact and clamping the frame. This elastic design adapts to irregularities in the frame surface, enhancing the grip and stability of the clamping mechanism. The elastic material or structure reduces damage to the frame surface during clamping, preserving the frame's appearance. The sixth chute 901 is provided at the side of the fifth fixed frame 9. Sliding tracks are provided for the two fourth adjustment blocks 902, enabling flexible adjustment of the clamping position. The two fourth adjustment blocks 902 are slidably connected to the upper and lower ends of the sixth slide 901, respectively. This allows for adjustment of the clamping height and width to accommodate vehicle frames of varying sizes and shapes. The fourth adjustment block 902 and the elastic clamping jaws 903 are fixedly connected to the side ends of the two fourth adjustment blocks 902. They directly contact and clamp the vehicle frame, providing a stable clamping force and preventing displacement or shaking during the welding process.

[0063] For details, please refer to Figure 1-11 The lifting assembly includes a base plate 3, a lifting frame 301, an upper plate 302 and a first electric telescopic rod 303. The base plate 3 is fixedly connected to the upper end of the mobile platform 101, the lifting frame 301 is connected to the base plate 3, the upper plate 302 is connected to the upper end of the lifting frame 301, and the first electric telescopic rod 303 is rotatably connected between the base plate 3 and the lifting frame 301 through a rotating shaft.

[0064] In this embodiment, the base plate 3 is fixedly connected to the upper end of the mobile platform 101 and serves as the foundational support for the entire lifting assembly. It provides a solid foundation, ensuring stability during lifting and facilitating integration with other components, such as the mobile platform 101. The lifting frame 301 is connected to the base plate 3 and to the upper plate 302, allowing for height adjustment through structural adjustments. Its adjustable design allows for flexible height adjustments to accommodate varying welding requirements. Its sturdy structure can withstand a certain load without deformation. The upper plate 302 is connected to the upper end of the lifting frame 301 and provides a mounting platform for the cross frame 4 and other frame components. It provides a level work surface, ensuring the stability of the frame components. The height can be adjusted as needed, enhancing operational flexibility. A first electric telescopic rod 303 is rotatably connected between the base plate 3 and the lifting frame 301 via a rotating shaft, driving the lifting frame 301 up and down. The base plate 3 is fixedly connected to the upper end of the mobile platform 101. It provides basic support for the lifting assembly and ensures the stability of the overall structure. The lifting frame 301 is connected to the base plate 3. As the primary actuator for lifting, the upper plate 302 achieves height adjustment through structural changes. It is connected to the upper end of the lifting frame 301. It provides a horizontal work surface for mounting the cross frame 4 and other frame components. The lower plate 3 and the first electric telescopic rod 303 are rotatably connected between the lower plate 3 and the lifting frame 301 via a rotating shaft. The telescopic action drives the lifting frame 301 up and down, achieving height adjustment.

[0065] For details, please refer to Figure 1-11 The lower end of the support frame 1 is fixedly connected to the base 11, and the left and right sides of the upper end of the base 11 are respectively fixedly connected to the slide rails 12, and the two slide rails 12 are connected to the mounting platform 13, and the upper ends of the two mounting platforms 13 are fixedly connected to the robot arms 14, and the side end of one of the robot arms 14 is connected to the welding device 15, and the side end of the other robot arm 14 is connected to the painting device 16.

[0066] In this embodiment, the base 11 is fixedly connected to the lower end of the support frame 1, providing basic support for the entire device. This provides a solid foundation, ensuring the stability of the device during operation. Slide rails 12 are fixedly connected to the left and right sides of the upper end of the base 11, allowing the mounting platform 13 to slide on them. This allows the mounting platform 13 to slide along the slide rails 12, enabling flexible position adjustment. This provides a movement path, reduces errors, and improves work efficiency. The mounting platform 13 is connected to the slide rails 12 and slides on them, for mounting a robotic arm 14. This provides an adjustable platform, allowing the robotic arm 14 to be repositioned as needed. Multiple mounting platforms 13 can be installed simultaneously, allowing robotic arms with different functions to be installed simultaneously, improving production efficiency. The robotic arm 14 is fixedly connected to the upper end of the mounting platform 13 and is used to perform tasks such as welding or painting. It is highly flexible and can be precisely positioned wherever work is required. A welding device 15 is connected to the side of one robotic arm 14 for welding. A painting device 16 is connected to the side of another robotic arm 14 for painting. Spray evenly to improve the quality of surface treatment.

[0067] The working principle and use process of the present invention are as follows: first, start the entire welding device, ensure that the supporting frame 1, the moving platform 101, the screw rod 103, the cross frame 4, the first fixed frame 5, the second adjusting block 6, the third adjusting block 7, the fourth fixed frame 8, the fifth fixed frame 9 and other components are in normal working condition, use the adjustment component to adjust the two sets of screw rods 103 synchronously or asynchronously to ensure that the moving platform 101 can slide smoothly to the specified position, use the lifting component to adjust the height of the cross frame 4 to adapt it to the size and welding requirements of the frame 10 to be welded, and place the four small frames on the four frame placement components respectively. Specifically, fix the two small frames on the first fixed frame respectively. The first L-shaped clamping plate 505, the first clamping protrusion 506, the arc-shaped limiting frame 507, the second L-shaped clamping plate 802, the second clamping protrusion 803 and other components are used to clamp and fix them. The other two small frames are respectively fixed to the placement frame 603 on the second adjustment block 6 and the elastic clamping claw 903 on the fifth fixing frame 9 to ensure that the frame 10 remains stable during the welding process. By adjusting the positions of the various slides such as the first slide 401, the second slide 501, the fourth slide 602, the fifth slide 801, and the sixth slide 901, the spacing between the four small frames is ensured to be moderate to avoid mutual interference during welding. The two ends of the frame are respectively placed on two sets of frame placement components, specifically: one end of the frame is fixed on the first fixing frame 5 and the fourth fixing frame 8, and the other end is fixed on the second adjustment block 6 and the fifth fixing frame 9. The movement of the two sets of screw rods 103 is controlled by the adjustment component to make the two sets of frame placement components close to each other to adapt to the length of the large frame, and the adjustment is achieved through the cooperation of the first chain 107 and the motor 108. The large frame is firmly fixed by various clamping components such as the first L-shaped clamping plate 505, the second L-shaped clamping plate 802, and the elastic clamping claw 903 to ensure stability during the welding process. According to the welding requirements of the four small frames, two sets of robot arms 14 are used. The welding device 15 and the painting device 16 are driven separately to perform path planning, determine the welding points and welding sequence of each frame, start the welding device 15, and synchronously weld the welding points of the four frames. At the same time, the painting device 16 immediately sprays the welded parts for protection, monitors the welding quality in real time, and fine-tunes the position of the frame 10 by adjusting the components when necessary to ensure welding requirements. According to the welding requirements of large frames, two groups of robot arms 14 work together: one group of robot arms 14 drives the welding device 15 to weld one side of the frame, and the other group of robot arms 14 drives the painting device 16 to spray the welded parts on the other side for protection.Alternatively, two sets of robotic arms 14 can perform welding operations simultaneously, each responsible for different welding areas of the frame, improving welding efficiency. During the welding process, the positions of the two sets of frame components are adjusted in real time through adjustment components to ensure that the welding path covers the entire frame. After welding is completed, all clamping components such as the first L-shaped clamping plate 505, the second L-shaped clamping plate 802, and the elastic clamping claws 903 are released, the frame 10 is removed, and the welding device 15 and the painting device 16 are cleaned and maintained to ensure long-term stable operation of the equipment. The movable platform 101 and the cross frame 4 are reset to their initial positions, and the power is turned off, completing the entire welding process.

[0068] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A folding bicycle frame welding device, comprising: The support frame (1) and two movable platforms (101) slidably connected thereto are characterized in that they further include: The adjusting mechanism comprises a moving part, a frame placement part and a frame (10), wherein: The vehicle frame (10) is connected to the vehicle frame placement component; The movable parts include two groups of mounting seats (102), screw rods (103), screw rod nuts (104), connecting blocks (105) and adjustment components. The two groups of mounting seats (102) are respectively fixedly connected to the lower inner wall of the support frame (1). The two groups of screw rods (103) are respectively rotatably connected to the two groups of mounting seats (102). The two groups of screw rod nuts (104) are respectively fixedly connected to the circumferential surfaces of the two groups of screw rods (103). The two groups of connecting blocks (105) are respectively fixedly connected to the upper ends of the two groups of screw rod nuts (104). The two groups of connecting blocks (105) are respectively connected to the two groups of moving platforms (101). The adjustment component is arranged at the side end of the support frame (1) to realize the adjustment between the two groups of screw rods (103). A vehicle frame placement component, the vehicle frame placement component includes a lifting component, a cross frame (4), a first slide groove (401), a first fixed frame (5), a second adjustment block (6), a third adjustment block (7), a fourth fixed frame (8) and a fifth fixed frame (9), the cross frame (4) is fixedly connected to the upper end of the lifting component, the first slide groove (401) is opened at the side end of the cross frame (4), the first fixed frame (5) is fixedly connected to the side end of the cross frame (4), the second adjustment block (6) is slidably connected to the side end of the first slide groove (401), the third adjustment block (7) is slidably connected to the side end of the first slide groove (401), the fourth fixed frame (8) is rotatably connected to the side end of the third adjustment block (7), and the fifth fixed frame (9) is fixedly connected to the side end of the third adjustment block (7).

2. A folding bicycle frame welding device according to claim 1, characterized in that: The adjustment assembly comprises two first gears (106), a cross slot (1061), a round rod (1063), a cross block (1064), a limit block (1062), a first chain (107), a first electric telescopic rod (2), a connecting plate (201) and a spring (202), wherein the two first gears (106) are respectively fixedly connected to the side ends of the two screw rods (103), the cross slot (1061) is opened at the side end of one of the first gears (106), the round rod (1063) is fixedly connected to the side end of one of the screw rods (103), the cross block (1064) is fixedly connected to the side end of the round rod (1063), the limit block (1062) is fixedly connected to the side end of the round rod (1063), and the limit block (1062) is fixedly connected to the side end of the first chain (107), the first electric telescopic rod (2), a connecting plate (201) and a spring (202). The block (1062) is fixedly connected to the side end of the cross block (1064), the cross slot (1061) matches the cross block (1064), the first chain (107) is meshed and rotatably connected to the circumferential surfaces of the two first gears (106), the first electric telescopic rod (2) is fixedly connected to the side end of the support frame (1), the connecting plate (201) is fixedly connected to the output end of the first electric telescopic rod (2), the side end of the connecting plate (201) is fixed to the first gear (106), and the connecting plate (201) is slidably connected to the round rod (1063), and the spring (202) is sleeved and connected to the circumferential surface of the output end of the first electric telescopic rod (2).

3. A folding bicycle frame welding device according to claim 2, characterized in that: The side end of one of the screw rods (103) is fixedly connected to a third gear (110), the side end of the support frame (1) is fixedly connected to a motor (108), the output end of the motor (108) is fixedly connected to a second gear (109), and the second gear (109) and the third gear (110) are meshed and rotatably connected to a second chain (111).

4. A folding bicycle frame welding device according to claim 3, characterized in that: The first fixing frame (5) further comprises a second sliding groove (501), a first adjusting block (502), a second fixing frame (503), a third sliding groove (504), two first L-shaped clamping plates (505), two first clamping protrusions (506) and an arc-shaped limiting frame (507), wherein the second sliding groove (501) is provided at a side end of the first fixing frame (5), the first adjusting block (502) is slidably connected to the side end of the second sliding groove (501), and the second fixing frame (503) is rotatably connected to the first adjusting block (50 2), the third sliding groove (504) is opened at the side end of the second fixing frame (503), the two first L-shaped clamping plates (505) are respectively slidably connected to the side ends of the third sliding groove (504), the two first clamping protrusions (506) are respectively connected to the side ends of the two first L-shaped clamping plates (505) by bolt threads, the arc-shaped limiting frame (507) is fixedly connected to the side end of the second fixing frame (503), and the arc-shaped limiting frame (507) is threadedly connected to the first adjusting block (502) by bolts.

5. The folding bicycle frame welding device according to claim 4, characterized in that: The second adjustment block (6) further includes a third fixing frame (601), a fourth sliding groove (602), a placement frame (603), and a round rod (604), wherein the third fixing frame (601) is fixedly connected to the side end of the second adjustment block (6), the fourth sliding groove (602) is opened at the side end of the third fixing frame (601), the placement frame (603) is slidably connected to the side end of the fourth sliding groove (602), and the round rod (604) is threadedly connected to the side end of the placement frame (603) by a bolt.

6. A folding bicycle frame welding device according to claim 5, characterized in that: The fourth fixing frame (8) further comprises a fifth sliding groove (801), a second L-shaped clamping plate (802), a second clamping protrusion (803) and a light rod (804), wherein the fifth sliding groove (801) is opened at the side end of the fourth fixing frame (8), the second L-shaped clamping plate (802) is slidably connected to the side end of the fifth sliding groove (801), the second clamping protrusion (803) is threadedly connected to the side end of the second L-shaped clamping plate (802) by a bolt, and the light rod (804) is fixedly connected to the side end of the fourth fixing frame (8).

7. A folding bicycle frame welding device according to claim 6, characterized in that: The fifth fixing frame (9) further comprises a sixth slide groove (901), two fourth adjustment blocks (902) and two elastic clamping claws (903), wherein the sixth slide groove (901) is opened at the side end of the fifth fixing frame (9), the two fourth adjustment blocks (902) are respectively slidably connected to the upper and lower ends of the sixth slide groove (901), and the two elastic clamping claws (903) are respectively fixedly connected to the side ends of the two fourth adjustment blocks (902).

8. The folding bicycle frame welding device according to claim 7, characterized in that: The lifting assembly comprises a base plate (3), a lifting frame (301), an upper plate (302) and a first electric telescopic rod (303); the base plate (3) is fixedly connected to the upper end of the mobile platform (101); the lifting frame (301) is connected to the base plate (3); the upper plate (302) is connected to the upper end of the lifting frame (301); and the first electric telescopic rod (303) is rotatably connected between the base plate (3) and the lifting frame (301) via a rotating shaft.

9. The folding bicycle frame welding device according to claim 8, characterized in that: The lower end of the support frame (1) is fixedly connected to a base (11), the left and right sides of the upper end of the base (11) are respectively fixedly connected to slide rails (12), the two slide rails (12) are connected to mounting platforms (13), the upper ends of the two mounting platforms (13) are fixedly connected to machine arms (14), the side end of one of the machine arms (14) is connected to a welding device (15), and the side end of the other machine arm (14) is connected to a painting device (16).

10. A welding method for a folding bicycle frame welding device, using the folding bicycle frame welding device according to any one of claims 1 to 9, characterized in that: The steps include: S1: Equipment initialization and adjustment: Start the device and check whether the supporting frame (1), the movable platform (101), the screw rod (103), the cross frame (4), the first fixed frame (5), the second adjustment block (6), the third adjustment block (7), the fourth fixed frame (8), the fifth fixed frame (9) and other components are in normal working condition; synchronize the two sets of screw rods (103) by adjusting the components to ensure that the movable platform (101) can slide smoothly to the specified position; use the lifting component to adjust the height of the cross frame (4) to adapt it to the size of the frame (10) to be welded and the welding requirements; S2: The frame is placed and fixed: small frame fixing mode (four frames are welded at the same time): four small frames are placed on four frame placement components respectively, specifically: two small frames are fixed on the first fixing frame (5) and the fourth fixing frame (8) respectively, and are clamped and fixed by the first L-shaped clamping plate (505), the first clamping protrusion (506), the arc-shaped limiting frame (507), the second L-shaped clamping plate (802), the second clamping protrusion (803) and other components; the other two small frames are fixed on the placement frame (603) on the second adjustment block (6) and the elastic clamping claw (903) on the fifth fixing frame (9) respectively, to ensure that the frame (10) remains stable during the welding process; (2) by adjusting each slide groove (such as the first slide groove (401), the second slide groove (501), the fourth slide groove (602), the fifth slide groove (801), the sixth The position of the slide (901) ensures that the spacing between the four small frames is moderate to avoid mutual interference during welding; a large frame fixing mode (two groups of frames are close to each other for fixing); the two ends of a large frame are respectively placed on the two groups of frame placement components, specifically: one end of the frame is fixed on the first fixing frame (5) and the fourth fixing frame (8), and the other end is fixed on the second adjustment block (6) and the fifth fixing frame (9); the movement of the two groups of screw rods (103) is controlled by the adjustment component to make the two groups of frame placement components close to each other to adapt to the length of the large frame, and the adjustment is achieved by the cooperation of the first chain (107) and the motor (108) (3) the large frame is firmly fixed by using various clamping components (such as the first L-shaped clamping plate (505), the second L-shaped clamping plate (802), the elastic clamping claw (903), etc.) to ensure stability during the welding process; S3: Welding path planning and execution: Small frame welding mode: According to the welding requirements of the four small frames, two sets of robot arms (14) drive the welding device (15) and the painting device (16) to perform path planning, determine the welding points and welding sequence of each frame; start the welding device (15) to perform synchronous welding on the welding points of the four frames, and at the same time use the painting device (16) to spray the completed welded parts for protection; monitor the welding quality in real time, and fine-tune the position of the frame (10) by adjusting the components when necessary to ensure the welding requirements; large vehicle The frame welding mode is based on the welding requirements of large vehicle frames, and two sets of robot arms (14) work together: one set of robot arms (14) drives the welding device (15) to weld one side of the frame, and the other set of robot arms (14) drives the painting device (16) to spray the welded part on the other side for protection; or the two sets of robot arms (14) perform welding operations at the same time, each responsible for different welding areas of the frame, thereby improving welding efficiency; (2) during the welding process, the positions of the two sets of frame placement components are adjusted in real time by adjusting the components to ensure that the welding path covers the entire frame; S4: Post-welding processing and equipment reset: After welding is completed, loosen all clamping parts (such as the first L-shaped clamp (505), the second L-shaped clamp (802), the elastic clamp (903), etc.), remove the frame (10); clean and maintain the welding device (15) and the painting device (16) to ensure the long-term stable operation of the equipment; (3) reset the movable platform (101) and the cross frame (4) to the initial position, turn off the power, and complete the entire welding process.

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