Welding device and method for agricultural machinery

Abstract

The invention relates to the technical field of agricultural machinery production, in particular to a welding device for agricultural machinery and a method thereof.The welding device comprises a welding platform, two Y-direction clamping assemblies and two X-direction clamping assemblies, the Y-direction clamping assemblies and the X-direction clamping assemblies are arranged above the welding platform, and each of the Y-direction clamping assemblies and the X-direction clamping assemblies comprises two clamping supporting plates; a driving assembly is arranged at the bottom of the clamping supporting plate, two sets of clamping plates are arranged on the upper surface of the clamping supporting plate, an electric push rod is arranged on one side of the clamping plate on one side, a limiting plate is arranged on one side of the clamping plate on the other side, the two sets of clamping plates are used for clamping a metal frame strip, and the limiting plate is used for adjusting the positions of the clamping plates. The electric push rod is used for controlling the clamping plate to be close to the other group of clamping plates to finish clamping; welding guns capable of moving in the X direction and the Y direction are arranged on the welding platform, an airflow control box is arranged between the welding guns, and a synchronous frame is arranged at the bottoms of the welding guns and can extrude gas in the airflow control box along with movement of the welding guns.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery production, in particular to a welding device and a method for agricultural machinery. Background Art

[0002] The frame used in agricultural machinery is made of four integrally formed profiles for end welding. During welding, the operator needs to place the profile on a positioning tool to fix the position of the profile to prevent the profile from shifting during welding. Existing welding fixtures generally fix two profiles and weld the corner of one of them. Moreover, after welding, the profile needs to be turned over for double-sided welding. Therefore, the position of the profile needs to be changed many times during the welding process, which is cumbersome and inconvenient to operate. Summary of the invention

[0003] The object of the present invention is to provide a welding device and method for agricultural machinery to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A welding device for agricultural machinery, comprising a welding platform and two groups of Y-direction clamping assemblies and two groups of X-direction clamping assemblies arranged above the welding platform, wherein the Y-direction clamping assembly and the X-direction clamping assembly each comprise two groups of clamping pallets, a driving assembly is arranged on the bottom of the clamping pallet, two groups of clamping plates are arranged on the upper surface of the clamping pallet, an electric push rod is arranged on one side of the clamping plate on one side, and a limit plate is arranged on one side of the clamping plate on the other side, the two groups of clamping plates are used to clamp metal frame bars, the limit plate is used to adjust the position of the clamping plates, and the electric push rod is used to control the clamping plates and the other group of clamping plates to approach each other to complete clamping; The welding platform is provided with a welding gun that can move in the X and Y directions, an airflow control box is provided between the welding guns, and a synchronization frame is provided at the bottom of the welding gun. The synchronization frame can follow the movement of the welding gun to squeeze the gas in the airflow control box and clean the installation groove of the metal frame bar.

[0005] Preferably, a movable plate is fixedly mounted on the upper surface of the clamping pallet, two sets of guide rods are connected to one side of the clamping plate, the guide rods are slidably mounted in the movable plate, and a spring is arranged on the surface of the guide rod between the movable plate and the clamping plate.

[0006] Preferably, the movable plates are provided with two groups, wherein one group of the movable plates is fixedly connected to the output shaft end of the electric push rod, and the other group of the movable plates is rotatably connected to one side with an adjusting screw, the adjusting screw is threadedly connected in the limit plate, and the clamping plate and the movable plate are both slidably connected to the clamping support plate.

[0007] Preferably, the driving assembly includes a screw and a motor transmission-connected to one end of the screw, the two ends of the screw are rotatably connected to the upper surface of the welding platform through ear plates, the surface of the screw is threadedly connected to an internal threaded sleeve, the surface of the internal threaded sleeve is rotatably connected to a movable connecting seat through a bearing, a connecting shaft is fixedly mounted on the movable connecting seat, and the connecting shaft is connected to the lower surface of the clamping support plate.

[0008] Preferably, two sets of linear guide rails are arranged on the upper surface of the clamping pallet, and a lifting assembly is arranged between the sliding blocks of the linear guide rails and the clamping pallet.

[0009] Preferably, the lifting assembly includes a supporting sleeve, a handwheel is provided on one side of the supporting sleeve, one end of the handwheel extends into the supporting sleeve and is fixedly installed with an adjusting bevel gear, one side of the adjusting bevel gear is meshed with a transition bevel gear, a lifting screw is connected inside the transition bevel gear, the top of the lifting screw is threadedly connected to a lifting shaft, the top of the lifting shaft is connected to the bottom of the clamping pallet, the lifting screw is rotatably connected to the supporting sleeve through a support rod, limit bars are provided on both sides of the lifting shaft, and the limit bars are slidably connected to the supporting sleeve.

[0010] Preferably, two groups of Y-axis electric slides are provided on the welding platform, an X-axis electric slide is installed on the slider of the Y-axis electric slide, and the welding gun is installed on the slider of the X-axis electric slide through a robotic arm.

[0011] Preferably, a synchronization frame is fixedly connected to one side of the robotic arm, a cavity is provided in the airflow control box, a piston plate is slidably installed in the cavity, the synchronization frame and the piston plate are connected, and the movement of the welding gun can drive the piston plate to slide in the airflow control box to squeeze the air in the cavity.

[0012] Preferably, a sealing strip is provided on the surface of the piston plate, a sliding groove is provided at the bottom of the airflow control box at the sliding position of the synchronous frame, both sides of the airflow control box are connected to exhaust main pipes, the exhaust main pipes are connected to several groups of X-direction blowing pipes through connecting pipes, one side of the X-direction blowing pipes is connected to a wind nozzle, both sides of the airflow control box are connected to Y-direction blowing pipes, and one end of the Y-direction blowing pipe is also connected to a wind nozzle.

[0013] The present invention also provides a method, based on the above-mentioned welding device for agricultural machinery, comprising the following steps: S1: According to the size of the metal frame bar, adjust the position of the Y-axis clamping assembly and the X-axis clamping assembly on the surface of the welding platform, determine the position of the Y-axis clamping assembly and the X-axis clamping assembly, and then place the metal frame bar on the upper surface of the clamping pallet, while ensuring that it falls between the two sets of clamping plates; S2: Rotate the limit plate, and use the threaded connection structure to push the moving plate and the clamping plate on one side to move closer to the electric push rod. Start the electric push rod and push the clamping plate at the end of its telescopic rod forward, so that the two sets of clamping plates clamp the metal frame strip. S3: Start the motors in the Y-axis clamping assembly and the X-axis clamping assembly to drive the screw to rotate, and through the connection between the mobile connecting seat and the internal thread sleeve, the mobile connecting seat and the connecting shaft drive the clamping support plate to move, so that the welding cuts of the metal frame strips are aligned and ready for welding; S4: Start the X-axis electric slide and the Y-axis electric slide to drive the robot arm and the welding gun to move to the welding cut of the metal frame strip, start the robot arm to align the welding port of the welding gun with the welding cut of the metal frame strip, and complete the welding; S5: Since there are multiple welding positions of the metal frame strip, the robot arm will move along the X-axis electric slide and the Y-axis electric slide with the Y-axis clamping assembly. During the movement, the piston plate in the air flow control box is connected to move through the synchronous frame, squeezing the air in the air flow control box, and then the air is sprayed out through the exhaust main pipe through the air nozzles at the ends of the X-axis blowing pipe and the Y-axis blowing pipe in turn, blowing air to the installation groove in the metal frame strip to clean it, thereby ensuring that the metal frame strip is clean after welding, without the need for secondary cleaning, and other components can be installed after welding.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, a Y-direction clamping assembly and an X-direction clamping assembly with a clamping support are respectively arranged on the welding platform. The clamping support is used as a clamping plate for clamping the metal frame strip. The welding range adapted by this welding device is as large as possible, which is convenient for welding metal frame strips of different models. At the same time, the clamping plate is elastically connected with a moving plate, an electric push rod is arranged on one side of the moving plate, and the moving plate on the other side is connected with a limit plate through an adjusting screw. If the size difference of the metal frame strips to be replaced and welded is large, the spacing between the two groups of clamping plates is adjusted by adjusting the screw, which saves the adjustment time and speeds up the adjustment efficiency. 2. In the present invention, a lifting assembly is provided at the bottom of the movable clamping support plate. When a thicker metal frame bar is encountered and the height of the clamping assembly needs to be adjusted, since the adjusting bevel gear at one end of the hand wheel is meshed with the lifting screw, the hand wheel can be rotated to drive the lifting screw to rotate and rise / fall, thereby driving the lifting shaft to rise / fall, completing the height adjustment of the clamping assembly, thereby increasing the operable range of welding; 3. In the present invention, an airflow control box is provided on the welding platform, and one side of the airflow control box is connected to an X-direction blowing pipe and a Y-direction blowing pipe with air nozzles, and the openings of the air nozzles are aligned with the mounting grooves of the metal frame strips, so that the welding slag accumulated in the mounting grooves of the metal frame strips can be removed. Therefore, after welding is completed, the frequency of later manual cleaning is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the clamping metal frame bar of the present invention; Figure 2 It is a schematic diagram of the main viewing direction three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the clamping assembly of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the blowing assembly of the present invention; Figure 5 It is a schematic cross-sectional view of the airflow control box of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram of part A in the middle; Figure 7 It is a schematic diagram of the three-dimensional structure of the lifting assembly of the present invention.

[0016] In the figure: 1. welding platform; 2. Y-axis clamping assembly; 3. X-axis clamping assembly; 4. linear guide rail; 5. clamping support plate; 6. electric push rod; 7. clamping plate; 8. supporting sleeve; 9. moving plate; 10. spring; 11. guide rod; 12. limit plate; 13. adjusting screw; 14. lead screw; 15. motor; 16. moving connecting seat; 17. internal thread sleeve; 18. connecting shaft; 19. mechanical arm; 20. welding gun; 21 , air flow control box; 22, X-axis air blowing pipe; 23, air nozzle; 24, Y-axis air blowing pipe; 25, X-axis electric slide; 26, Y-axis electric slide; 27, connecting pipe; 28, exhaust main pipe; 29, synchronous frame; 30, piston plate; 31, sealing strip; 32, slide groove; 33, support rod; 34, adjusting bevel gear; 35, transition bevel gear; 36, lifting screw; 37, hand wheel; 38, lifting shaft; 39, limit strip. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-7 , the present invention provides a technical solution: Example

[0019] A welding device for agricultural machinery, comprising a welding platform 1 and two groups of Y-direction clamping assemblies 2 and two groups of X-direction clamping assemblies 3 arranged above the welding platform 1, wherein the Y-direction clamping assemblies 2 and the X-direction clamping assemblies 3 each comprise two groups of clamping pallets 5, and two groups of clamping plates 7 are arranged on the upper surface of the clamping pallet 5, and the two groups of clamping plates 7 are used to clamp metal frame bars, and the electric push rod 6 is used to control the clamping plates 7 to approach the other group of clamping plates 7 to complete the clamping; In this embodiment, a Y-axis clamping assembly 2 and an X-axis clamping assembly 3 with a clamping pallet 5 are respectively arranged on the welding platform 1. The clamping pallet 5 is used for clamping the clamping plate 7 for clamping the metal frame bar. The welding range adapted by this welding device is as large as possible, which is convenient for welding metal frame bars of different models.

[0020] The welding platform 1 is provided with a welding gun 20 capable of moving in the X and Y directions. The welding platform 1 is provided with two sets of Y-direction electric slides 26. An X-direction electric slide 25 is installed on the slider of the Y-direction electric slide 26. The welding gun 20 is installed on the slider of the X-direction electric slide 25 through a robotic arm 19.

[0021] It should be noted that: by respectively arranging an X-axis electric slide 25 and a Y-axis electric slide 26 on the welding platform 1, the welding gun 20 is driven to move in the X-axis and the Y-axis, and welding is performed on the joints of the metal frame strips. Specifically, the welding gun 20 is arranged on the robot arm 19, and the operating range of the robot arm 19 is large. The robot arm 19 is used to carry the welding gun 20, and the moving range of the welding gun 20 is large, which ultimately ensures the operable range of welding.

[0022] An airflow control box 21 is provided between the welding guns 20, and a synchronous frame 29 is provided at the bottom of the welding gun 20. The synchronous frame 29 can follow the movement of the welding gun 20 to squeeze the gas in the airflow control box 21 and clean the installation groove of the metal frame bar.

[0023] An electric push rod 6 is provided on one side of the splint 7, and a limit plate 12 is provided on the other side of the splint 7, and the limit plate 12 is used to adjust the position of the splint 7; a movable plate 9 is fixedly installed on the upper surface of the clamping pallet 5, and two groups of guide rods 11 are connected to one side of the splint 7, and the guide rods 11 are slidably installed in the movable plate 9, and a spring 10 is provided on the surface of the guide rod 11 between the movable plate 9 and the splint 7.

[0024] In this embodiment, two groups of clamping plates 7 are respectively provided, and both groups of clamping plates 7 are elastically connected through springs 10 and movable plates 9. When clamping, the clamping force can generate buffering to a certain extent, thereby avoiding deformation of the metal frame strip caused by clamping.

[0025] The movable plates 9 are provided in two groups, wherein one group of the movable plates 9 is fixedly connected to the output shaft end of the electric push rod 6, and the other group of the movable plates 9 is rotatably connected to one side with an adjusting screw 13, and the adjusting screw 13 is threadedly connected in the limit plate 12, and the clamping plate 7 and the movable plate 9 are both slidably connected to the clamping support plate 5.

[0026] Specifically, it is ensured that the distance between the clamping plates 7 can be fine-tuned so that the clamping spacing can be adjusted as large as possible. The clamping plate 7 on one side is connected to the electric push rod 6, and the clamping plate 7 on the other side is elastically connected to the moving plate 9. The moving plate 9 is connected to the limit plate 12 on one side by a thread. By rotating the adjusting screw 13, the position of the clamping plate 7 on one side can be quickly adjusted. If the size difference of the replaced metal frame strips to be welded is large, the spacing between the two groups of clamping plates 7 can be adjusted by adjusting the screw 13, which saves the adjustment time and speeds up the adjustment efficiency.

[0027] A driving assembly is provided at the bottom of the clamping pallet 5, and the driving assembly includes a screw rod 14 and a motor 15 which is transmission-connected to one end of the screw rod 14, and both ends of the screw rod 14 are rotationally connected to the upper surface of the welding platform 1 through ear plates, and an internal threaded sleeve 17 is threadedly connected to the surface of the screw rod 14, and a movable connecting seat 16 is rotationally connected to the surface of the internal threaded sleeve 17 through a bearing, and a connecting shaft 18 is fixedly installed on the movable connecting seat 16, and the connecting shaft 18 is connected to the lower surface of the clamping pallet 5.

[0028] In this embodiment, a screw rod 14 and a motor 15 are respectively provided at the bottom of the clamping pallet 5. When the motor 15 is started, the screw rod 14 is driven to rotate. The rotation of the screw rod 14 is connected to the movable connecting seat 16 through the internal threaded sleeve 17. The movable connecting seat 16 is connected to the clamping pallet 5. Therefore, the screw rod 14 and the motor 15 can change the position of the clamping pallet 5, thereby changing the horizontal position of the clamping plate 7 above the clamping pallet 5, and finally realizing the clamping adaptation of different sizes.

[0029] Embodiment 2, based on embodiment 1, in order to adapt to the welding of metal frame bars in a wider range, thicker metal frame bars may be processed, so if the distance between the height of the clamping support plate 5 and the welding height of the welding gun 20 cannot be adjusted, the welding range is limited. Therefore, the following structure is set: Two sets of linear guide rails 4 are arranged on the upper surface of the clamping support plate 5, and a lifting assembly is arranged between the sliding block of the linear guide rails 4 and the clamping support plate 5. The lifting assembly includes a support sleeve 8, a hand wheel 37 is arranged on one side of the support sleeve 8, one end of the hand wheel 37 extends into the support sleeve 8 and is fixedly installed with an adjusting bevel gear 34, one side of the adjusting bevel gear 34 is meshed with a transition bevel gear 35, a lifting screw 36 is connected inside the transition bevel gear 35, the top of the lifting screw 36 is threadedly connected with a lifting shaft 38, the top end of the lifting shaft 38 is connected to the bottom of the clamping support plate 5, the lifting screw 36 is rotatably connected to the support sleeve 8 through the support rod 33, and limit bars 39 are arranged on both sides of the lifting shaft 38, and the limit bars 39 are slidably connected to the support sleeve 8.

[0030] In this embodiment, when a thicker metal frame strip is encountered and the height of the clamping assembly needs to be adjusted, since the adjusting bevel gear (34) at one end of the hand wheel (37) and the lifting screw (36) are meshed, the hand wheel (37) can be rotated to drive the lifting screw (36) to rotate and rise / fall, thereby driving the lifting shaft (38) to rise / fall, thereby completing the height adjustment of the clamping assembly, thereby increasing the operable range of welding.

[0031] Embodiment 3, based on embodiment 1, a large amount of welding slag is often generated during welding, and the welding slag will follow the air and fall on multiple positions of the welded parts during welding, especially in the installation groove of the metal frame bar. After welding is completed, the above grooves need to be cleaned manually, which increases labor and causes manpower consumption. Therefore, the following structure is set: A synchronous frame 29 is fixedly connected to one side of the robotic arm 19, a cavity is provided in the airflow control box 21, a piston plate 30 is slidably installed in the cavity, the synchronous frame 29 and the piston plate 30 are connected, the welding gun 20 can move to drive the piston plate 30 to slide in the airflow control box 21, and squeeze the airflow control box 21, both sides of the airflow control box 21 are connected with exhaust main pipes 28, the exhaust main pipes 28 are connected with several groups of X-direction blowing pipes 22 through connecting pipes 27, one side of the X-direction blowing pipes 22 is connected with a nozzle 23, both sides of the airflow control box 21 are connected with Y-direction blowing pipes 24, and one end of the Y-direction blowing pipe 24 is also connected with a nozzle 23.

[0032] In this embodiment, since the welding positions of the metal frame strips are respectively arranged at the four corners, and since the robot arm 19 and the welding gun 20 will move multiple times on the welding platform 1, the robot arm 19 and the airflow control box 21 are connected by a synchronization frame 29, and a piston plate 30 is slidably arranged in the airflow control box 21. The piston plate 30 moves in the airflow control box 21 driven by the robot arm 19, thereby squeezing the airflow control box 21, so that the air in the airflow control box 21 is discharged through the air nozzle 23. It should be noted that the airflow control box 21 is connected to one side and both ends of the airflow control box 21. The opening of the air nozzle 23 is aligned with the mounting groove of the metal frame strip. Therefore, the welding slag accumulated in the mounting groove of the metal frame strip can be removed. Therefore, after the welding is completed, the frequency of manual cleaning in the later stage is reduced.

[0033] Specifically, a sealing strip 31 is provided on the surface of the piston plate 30 , and a sliding groove 32 is provided at the bottom of the airflow control box 21 at the sliding position of the synchronous frame 29 .

[0034] It should be noted that a sealing strip 31 is provided between the piston plate 30 and the airflow control box 21 to ensure the air tightness between the piston plate 30 and the airflow control box 21 , which is more conducive to the air outlet operation of the airflow control box 21 .

[0035] Working principle: During the use of the device, firstly, according to the size of the metal frame bar, by adjusting the position of the Y-direction clamping assembly 2 and the X-direction clamping assembly 3 on the surface of the welding platform 1, after determining the position of the Y-direction clamping assembly 2 and the X-direction clamping assembly 3, the metal frame bar is placed on the upper surface of the clamping support plate 5, and at the same time ensured that it falls between the two groups of clamping plates 7; The rotating limit plate 12 can push the movable plate 9 and the clamping plate 7 on one side toward the electric push rod 6 by using the threaded connection structure, and the electric push rod 6 is started to push the clamping plate 7 at the end of its telescopic rod forward, so that the two groups of clamping plates 7 clamp the metal frame strips; Start the motor 15 in the Y-axis clamping assembly 2 and the X-axis clamping assembly 3 to drive the screw rod 14 to rotate, and through the connection between the mobile connecting seat 16 and the internal threaded sleeve 17, the mobile connecting seat 16 and the connecting shaft 18 drive the clamping support plate 5 to move, so that the welding cuts of the metal frame strips are aligned and ready for welding; Start the X-axis electric slide 25 and the Y-axis electric slide 26 to drive the robot arm 19 and the welding gun 20 to move to the welding incision of the metal frame strip, start the robot arm 19 to align the welding port of the welding gun 20 with the welding incision of the metal frame strip, and complete the welding; Since there are multiple welding positions for the metal frame strips, the robot arm 19 will carry the Y-axis clamping assembly 2 to move along the X-axis electric slide 25 and the Y-axis electric slide 26 respectively. During the movement, the piston plate 30 in the air flow control box 21 is connected to move through the synchronous frame 29, squeezing the air in the air flow control box 21, and spraying it through the exhaust main pipe 28 through the air nozzle 23 at the end of the X-axis blowing pipe 22 and the Y-axis blowing pipe 24 in turn, blowing air to the installation groove in the metal frame strip to clean it, thereby ensuring that the metal frame strip is clean after welding, without the need for secondary cleaning, and other components can be installed after welding.

[0036] The present invention also provides a welding method for agricultural machinery, based on a welding device for agricultural machinery, comprising the following steps: S1: According to the size of the metal frame bar, by adjusting the positions of the Y-direction clamping assembly 2 and the X-direction clamping assembly 3 on the surface of the welding platform 1, after determining the positions of the Y-direction clamping assembly 2 and the X-direction clamping assembly 3, the metal frame bar is placed on the upper surface of the clamping support plate 5, while ensuring that it falls between the two sets of clamping plates 7; S2: Rotate the limit plate 12, and use the threaded connection structure to push the movable plate 9 and the clamping plate 7 on one side to move closer to the electric push rod 6, start the electric push rod 6, and push the clamping plate 7 at the end of the telescopic rod forward, so that the two groups of clamping plates 7 clamp the metal frame strip; S3: Start the motor 15 in the Y-axis clamping assembly 2 and the X-axis clamping assembly 3 to drive the screw rod 14 to rotate, and through the connection between the mobile connecting seat 16 and the internal threaded sleeve 17, the mobile connecting seat 16 and the connecting shaft 18 drive the clamping support plate 5 to move, so that the welding cutouts of the metal frame strips are aligned and ready for welding; S4: Start the X-axis electric slide 25 and the Y-axis electric slide 26 to drive the robot arm 19 and the welding gun 20 to move to the welding incision of the metal frame strip, start the robot arm 19 to align the welding port of the welding gun 20 with the welding incision of the metal frame strip, and complete the welding; S5: Since there are multiple welding positions for the metal frame strip, the robot arm 19 will carry the Y-axis clamping assembly 2 to move along the X-axis electric slide 25 and the Y-axis electric slide 26 respectively. During the movement, the piston plate 30 in the air flow control box 21 is connected to move through the synchronous frame 29, squeezing the air in the air flow control box 21, and spraying it through the exhaust main pipe 28 through the air nozzle 23 at the end of the X-axis blowing pipe 22 and the Y-axis blowing pipe 24 in turn, blowing air to the installation groove in the metal frame strip to clean it, thereby ensuring that the metal frame strip is clean after welding, without the need for secondary cleaning, and other components can be installed after welding.

[0037] It should be noted that the electric push rod 6, motor 15, robotic arm 19, welding gun 20, X-axis electric slide 25 and Y-axis electric slide 26 are all devices or equipment existing in the prior art, or are devices or equipment that can be realized in the prior art. Their power supply, specific composition and principles are clear to those skilled in the art, so they will not be described in detail.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for agricultural machinery, comprising a welding platform (1) and two groups of Y-direction clamping assemblies (2) and two groups of X-direction clamping assemblies (3) arranged above the welding platform (1), characterized in that: The Y-axis clamping assembly (2) and the X-axis clamping assembly (3) each comprise two groups of clamping pallets (5), a driving assembly being arranged at the bottom of the clamping pallet (5), two groups of clamping plates (7) being arranged on the upper surface of the clamping pallet (5), one side of the clamping plate (7) being provided with an electric push rod (6), and one side of the clamping plate (7) being provided with a limiting plate (12), the two groups of clamping plates (7) being used to clamp the metal frame strip, the limiting plate (12) being used to adjust the position of the clamping plates (7), and the electric push rod (6) being used to control the clamping plates (7) and the other group of clamping plates (7) to approach each other to complete clamping; The welding platform (1) is provided with a welding gun (20) capable of moving in the X and Y directions, an airflow control box (21) is provided between the welding guns (20), and a synchronous frame (29) is provided at the bottom of the welding guns (20). The synchronous frame (29) can follow the movement of the welding guns (20) to squeeze the gas in the airflow control box (21) to clean the installation groove of the metal frame strip.

2. A welding device for agricultural machinery according to claim 1, characterized in that: A movable plate (9) is fixedly mounted on the upper surface of the clamping support plate (5); two groups of guide rods (11) are connected to one side of the clamping plate (7); the guide rods (11) are slidably mounted in the movable plate (9); and a spring (10) is provided on the surface of the guide rods (11) between the movable plate (9) and the clamping plate (7).

3. A welding device for agricultural machinery according to claim 2, characterized in that: The movable plates (9) are provided in two groups, wherein one group of the movable plates (9) is fixedly connected to the output shaft end of the electric push rod (6), and the other group of the movable plates (9) is rotatably connected to an adjusting screw (13) on one side, wherein the adjusting screw (13) is threadedly connected to the limiting plate (12), and the clamping plate (7) and the movable plate (9) are both slidably connected to the clamping support plate (5).

4. A welding device for agricultural machinery according to claim 1, characterized in that: The driving assembly comprises a screw rod (14) and a motor (15) which is transmission-connected to one end of the screw rod (14); both ends of the screw rod (14) are rotationally connected to the upper surface of the welding platform (1) via ear plates; an internal thread sleeve (17) is threadedly connected to the surface of the screw rod (14); a movable connecting seat (16) is rotationally connected to the surface of the internal thread sleeve (17) via a bearing; a connecting shaft (18) is fixedly mounted on the movable connecting seat (16); and the connecting shaft (18) is connected to the lower surface of the clamping support plate (5).

5. A welding device for agricultural machinery according to claim 1, characterized in that: Two groups of linear guide rails (4) are arranged on the upper surface of the clamping support plate (5), and a lifting assembly is arranged between the sliding blocks of the linear guide rails (4) and the clamping support plate (5).

6. A welding device for agricultural machinery according to claim 5, characterized in that: The lifting assembly comprises a support sleeve (8), a hand wheel (37) is provided on one side of the support sleeve (8), one end of the hand wheel (37) extends into the support sleeve (8) and is fixedly mounted with an adjusting bevel gear (34), one side of the adjusting bevel gear (34) is meshed with a transition bevel gear (35), a lifting screw (36) is connected inside the transition bevel gear (35), a lifting shaft (38) is threadedly connected to the top of the lifting screw (36), a top end of the lifting shaft (38) is connected to the bottom of the clamping support plate (5), the lifting screw (36) is rotatably connected to the support sleeve (8) through a support rod (33), and limit bars (39) are provided on both sides of the lifting shaft (38), and the limit bars (39) are slidably connected to the support sleeve (8).

7. A welding device for agricultural machinery according to claim 1, characterized in that: The welding platform (1) is provided with two groups of Y-direction electric slides (26), an X-direction electric slide (25) is installed on the slide block of the Y-direction electric slide (26), and the welding gun (20) is installed on the slide block of the X-direction electric slide (25) via a mechanical arm (19).

8. A welding device for agricultural machinery according to claim 7, characterized in that: A synchronous frame (29) is fixedly connected to one side of the mechanical arm (19), a cavity is provided in the airflow control box (21), a piston plate (30) is slidably mounted in the cavity, the synchronous frame (29) and the piston plate (30) are connected, and the movement of the welding gun (20) can drive the piston plate (30) to slide in the airflow control box (21), thereby squeezing the air in the cavity.

9. A welding device for agricultural machinery according to claim 8, characterized in that: A sealing strip (31) is provided on the surface of the piston plate (30); a sliding groove (32) is provided on the bottom of the airflow control box (21) at a sliding position of the synchronous frame (29); both sides of the airflow control box (21) are connected to exhaust pipes (28); the exhaust pipes (28) are connected to a plurality of groups of X-direction blowing pipes (22) through connecting pipes (27); one side of the X-direction blowing pipes (22) is connected to a nozzle (23); both sides of the airflow control box (21) are connected to Y-direction blowing pipes (24); one end of the Y-direction blowing pipes (24) is also connected to a nozzle (23).

10. A welding method for agricultural machinery, based on a welding device for agricultural machinery according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: According to the size of the metal frame strip, the positions of the Y-axis clamping assembly (2) and the X-axis clamping assembly (3) on the surface of the welding platform (1) are adjusted. After the positions of the Y-axis clamping assembly (2) and the X-axis clamping assembly (3) are determined, the metal frame strip is placed on the upper surface of the clamping support plate (5) while ensuring that it falls between the two sets of clamping plates (7); S2: Rotate the limit plate (12) to push the movable plate (9) and the clamping plate (7) on one side toward the electric push rod (6) by using the threaded connection structure, start the electric push rod (6), and push the clamping plate (7) at the end of the telescopic rod forward, so that the two sets of clamping plates (7) clamp the metal frame strip; S3: starting the motor (15) in the Y-axis clamping assembly (2) and the X-axis clamping assembly (3) to drive the screw rod (14) to rotate, and through the connection between the movable connecting seat (16) and the internal threaded sleeve (17), the movable connecting seat (16) and the connecting shaft (18) drive the clamping support plate (5) to move, thereby aligning the welding cuts of the metal frame strips and preparing for welding; S4: starting the X-axis electric slide (25) and the Y-axis electric slide (26), driving the mechanical arm (19) and the welding gun (20) to move to the welding incision of the metal frame strip, starting the mechanical arm (19) to align the welding port of the welding gun (20) with the welding incision of the metal frame strip, and completing the welding; S5: Since there are multiple welding positions of the metal frame strip, the robot arm (19) will carry the Y-axis clamping assembly (2) to move along the X-axis electric slide (25) and the Y-axis electric slide (26). During the movement, the piston plate (30) in the air flow control box (21) is connected to the synchronous frame (29) to move, squeeze the air in the air flow control box (21), and then pass through the exhaust main pipe (28) and the air nozzle (23) at the end of the X-axis blowing pipe (22) and the Y-axis blowing pipe (24) to blow air to the installation groove in the metal frame strip to clean it, thereby ensuring that the metal frame strip is clean after welding without the need for secondary cleaning.

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