Automated welding equipment and welding process for the side frame of agricultural machinery cab

Abstract

This invention discloses an automated welding equipment and welding process for the side frame of an agricultural machinery cab, relating to the field of welding technology. The equipment includes: a clamping device with its upper end clamping the side frame; and a welding arm disposed on one side of the clamping device. This invention, through the cooperation of a weld strength control component and an extrusion nozzle, has the ability to generate welds of different shapes on the same workpiece. Wide weld mode: for sealing and large gaps, the driving slider and elastic metal plate cause the sleeve and extrusion nozzle to vibrate along both sides of the weld, expanding the weld width and filling larger assembly gaps. High-strength mode: for key stress points, the driving elastic metal plate deforms, causing the extrusion nozzle to vibrate back and forth along the weld, causing the flux to accumulate at the weld. Combined with the rapid cooling effect of the molten pool cooling component, a high-strength weld overlay structure is formed, greatly improving the load-bearing capacity of key nodes.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to automated welding equipment and welding process for the side frame of agricultural machinery cab. Background Technology

[0002] The automated welding of the side frame of the agricultural machinery cab is achieved by setting up a matching assembly line to transport the parts that need to be welded, and then using a robotic arm that can automatically weld the parts on the assembly line.

[0003] For example, patent publication number CN117583795B, entitled "Automated Welding Equipment for Automotive Parts," belongs to the field of welding technology. The beneficial effect of this application lies in the filtration of high-temperature gas and welding fumes through a first and a second filtration zone, which significantly improves the filtration efficiency through dual filtration.

[0004] When agricultural machinery is operating in the field, the types and magnitude of loads borne by different parts of the cab frame vary significantly. For example, the connection between the upright and the crossbeam mainly bears bending and torsional loads, while the connection between the side panel and the top cover bears more shear force. The single welding process in the above-mentioned application is difficult to meet such differentiated strength requirements. Therefore, this application provides automated welding equipment and welding process for the side panel frame of agricultural machinery cab to meet the requirements. Summary of the Invention

[0005] The purpose of this application is to provide automated welding equipment and welding process for the side frame of agricultural machinery cab, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: an automated welding equipment for the side frame of an agricultural machinery cab, comprising:

[0007] A clamping device, the upper end of which clamps the side frame;

[0008] A welding arm is disposed on one side of the clamping device;

[0009] A fine-tuning mechanism is fixedly installed at one end of the welding arm, and a laser welding gun is installed inside the fine-tuning mechanism;

[0010] A weld strength control mechanism is located on one side of the laser welding gun;

[0011] The fine-tuning mechanism is used to fine-tune the welding angle of the laser welding gun to adapt to the structural curved surface of the side frame, and the weld strength control mechanism is used to adjust the welding strength according to the stress intensity of the side frame during use.

[0012] The weld strength control mechanism includes:

[0013] The molten pool cooling assembly is fixedly installed at the bottom of the laser welding gun. It is used to guide inert gas to be blown onto the surface of the molten pool to concentrate and control the shape of the molten pool, and to protect the weld from oxidation.

[0014] The flux adjustment assembly, installed inside the molten pool cooling assembly, is used to push different amounts of flux according to the stress conditions of various parts of the side frame to adjust the welding strength of the weld.

[0015] The weld strength control component is installed on the inner wall of the molten pool cooling component and sleeved on the flux discharge outlet of the flux conditioning component. By controlling the shaking mode of the flux outlet, the discharge shape of the flux is adjusted, thereby controlling the weld formation shape and strength.

[0016] The fine-tuning mechanism includes:

[0017] The machine housing is fixedly mounted on one side of the welding arm;

[0018] The connecting arms, numbering three and arranged in a circular array, are rotatably mounted on the bottom of the machine housing in a V-shape.

[0019] The support rod is rotatably mounted on one end of the connecting arm. The lower ends of the three support rods are provided with a central clamp, and the laser welding gun is fixedly installed inside the central clamp.

[0020] The control lever is rotatably mounted on the other end of the connecting arm, extends into the mechanical housing, and is fixedly connected to the electric telescopic rod inside it;

[0021] The electric telescopic rod drives the control rod to extend, which in turn rotates the V-shaped connecting arm, thereby moving the support rod and adjusting the angle of the laser welding gun inside the central clamp.

[0022] The molten pool cooling assembly includes:

[0023] The mounting frame is fitted onto the bottom of the outer surface of the laser welding gun;

[0024] Two connecting pipes are installed on both sides of the mounting frame, with their upper ends connected to the external inert vent pipe.

[0025] The duct shell is located at the lower end of the connecting pipe and on both sides of the laser welding gun. The air outlet of the duct shell corresponds to the weld pool and is used to guide inert gas to be sprayed onto the surface of the weld pool.

[0026] The flux adjustment component includes:

[0027] The spiral push tube has a spiral push rod inside and is fixedly installed inside the mounting frame.

[0028] The extrusion chamber contains a piston.

[0029] A three-way pipe, shaped like the letter Y;

[0030] A connecting hose is used to connect the spiral push tube and the three-way tube. The three-way tube is flexibly connected to the extrusion chamber via a rubber tube.

[0031] The extrusion nozzle is connected to the other end of the tee tube;

[0032] The spiral pusher tube delivers flux to the tee tube via a connecting hose, and the piston in the extrusion chamber forces the extrusion nozzle to discharge a large amount of flux for high-strength welding.

[0033] The weld strength control component includes:

[0034] The mounting block is fixedly installed between two duct shells, and the lower end of the mounting block has an inner groove.

[0035] The slide rail is located inside the inner groove, and a support block is provided on the outer surface of the slide rail;

[0036] Side support plates are installed on both sides of the support block;

[0037] The slider is slidably mounted inside the slide rail;

[0038] An elastic metal plate is disposed at the lower end of the slider and passes through the support block, and rubber columns are provided at the lower ends of both sides of the elastic metal plate, and rubber blocks are provided at the middle of both sides of the elastic metal plate.

[0039] A sleeve is fitted onto the outer surface of the tee pipe and connected to the lower end of the elastic metal plate.

[0040] The support plate is located on the opposite side of the side support plate and abuts against the inside of the rubber block to support the deformation movement of the elastic metal plate.

[0041] The first reciprocating motor is located between the side support plate and the rubber column, and is used to drive the elastic metal plate to deform and vibrate.

[0042] The first reciprocating motor drives the elastic metal plate to deform, causing the extrusion nozzle connected to the sleeve and the three-way pipe to vibrate, controlling the flux to vibrate and be discharged along both sides of the weld path.

[0043] The weld strength control component further includes:

[0044] The second reciprocating motor is located on one side of the elastic metal plate and is used to push the slider to slide inside the slide rail.

[0045] A spring is located on the other side of the elastic metal plate to assist the second reciprocating motor in driving the elastic metal plate to reciprocate.

[0046] The control logic of the weld strength control component is as follows:

[0047] When the side frame weld is large, control the first reciprocating motor to drive it, so that the flux outlet vibrates along both sides of the weld path.

[0048] When it is necessary to increase the welding strength, the second reciprocating motor is controlled to drive the flux outlet to vibrate back and forth along the weld path, and the flux is stacked by the sleeve driving the tee and the extrusion nozzle.

[0049] The working logic of the flux adjustment component is as follows:

[0050] The flux is continuously delivered through the spiral push tube;

[0051] When high-strength welding is required, the piston in the extrusion chamber extrudes the flux into the three-way pipe, causing the extrusion nozzle to discharge a large amount of flux.

[0052] At the same time, the duct shell sprays inert gas to quickly cool the excess welding liquid in the molten pool and trim the melt edge of the molten pool.

[0053] This invention also provides an automated welding process for the side frame of an agricultural machinery cab:

[0054] S1, During the welding process, the fine-tuning mechanism adjusts the welding angle of the laser welding gun according to the curvature change of the welding path, while the molten pool cooling component guides inert gas to blow onto the surface of the molten pool during the welding process, on the one hand protecting the weld from oxidation, and on the other hand concentrating the shape of the molten pool through gas pressure.

[0055] S2, while the flux adjustment component delivers different amounts of flux according to the stress requirements of different parts of the side frame, and the weld strength control component controls the discharge shape of the flux. When the weld is large, the weld strength control component controls the flux adjustment component to shake and discharge the flux along both sides of the weld path to expand the weld width.

[0056] S3, when it is necessary to increase the welding strength, the weld strength control component controls the flux adjustment component to shake and discharge the flux back and forth along the weld path, so that the flux is stacked at the weld. Combined with the rapid cooling of the inert gas by the molten pool cooling component, a high-strength weld overlay structure is formed.

[0057] In summary, the technical effects and advantages of this invention are as follows:

[0058] 1. This invention, through the cooperation of the weld strength control component and the extrusion nozzle, has the ability to generate welds of different shapes on the same workpiece; Wide seam mode: For sealing and large gaps, the drive slider and elastic metal plate drive the sleeve and extrusion nozzle to vibrate along both sides of the weld, expanding the weld width and filling the large assembly gap; High strength mode: For key stress points, the drive elastic metal plate to deform, driving the extrusion nozzle to vibrate back and forth along the weld, causing the flux to stack at the weld, combined with the rapid cooling effect of the molten pool cooling component, forming a high-strength weld overlay structure, greatly improving the load-bearing capacity of key nodes.

[0059] 2. This invention solves the problem of single weld strength and inability to match the stress requirements of different parts of the workpiece in the welding process by using a flux adjustment component. The flux adjustment component can accurately control the flux metering delivered to the tee pipe according to the actual stress conditions of each part of the side frame through a spiral pusher or extrusion chamber. In high stress areas of the frame, such as connection points and corners, the flux amount is increased to form high-strength welds, while the amount is reduced in low stress areas to save materials. This adaptive adjustment optimizes material costs and improves the overall structural reliability and fatigue resistance of the frame.

[0060] 3. This invention utilizes the gas guidance and cooling of the molten pool cooling component to solve the common problems of molten pool collapse and oxidation in laser welding. On the one hand, the inert gas isolates the air, preventing the weld metal from oxidizing at high temperatures and ensuring the purity of the weld. On the other hand, the gas pressure is used to concentrate the shape of the molten pool, preventing the liquid metal from flowing. Combined with the rapid cooling function, the weld grains are refined, further improving the mechanical properties of the welded joint. Attached Figure Description

[0061] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0062] Figure 1 A first-view three-dimensional structural diagram of an automated welding equipment for the side frame of an agricultural machinery cab.

[0063] Figure 2 A second-view three-dimensional structural diagram of an automated welding equipment for the side frame of an agricultural machinery cab.

[0064] Figure 3 A three-dimensional connection diagram of the side frame and the clamping device;

[0065] Figure 4 A schematic diagram of a partial three-dimensional connection structure of an automated welding equipment for the side frame of an agricultural machinery cab.

[0066] Figure 5 A first-view three-dimensional connection structure diagram of the fine-tuning mechanism, laser welding gun, and weld strength control mechanism;

[0067] Figure 6 A second-view three-dimensional connection structure diagram of the fine-tuning mechanism, laser welding gun, and weld strength control mechanism;

[0068] Figure 7 A schematic diagram of the three-dimensional connection structure of the fine-tuning mechanism;

[0069] Figure 8 This is a schematic diagram of the partial three-dimensional connection structure of the fine-tuning mechanism;

[0070] Figure 9 A first-view three-dimensional connection structure diagram of the laser welding gun and the weld strength control mechanism;

[0071] Figure 10 A second-view three-dimensional connection structure diagram of the laser welding gun and the weld strength control mechanism;

[0072] Figure 11 A schematic diagram of the three-dimensional connection structure of the weld strength control mechanism;

[0073] Figure 12 This is a schematic diagram of the three-dimensional connection structure of the molten pool cooling assembly;

[0074] Figure 13 This is a schematic diagram of the three-dimensional connection structure of the duct shell;

[0075] Figure 14 A schematic diagram of the three-dimensional connection structure of the flux adjustment assembly;

[0076] Figure 15 A three-dimensional connection structure diagram of the flux adjustment component and the weld strength control component;

[0077] Figure 16 A three-dimensional connection structure diagram of the flux adjustment component and the weld strength control component;

[0078] Figure 17 A schematic diagram of the three-dimensional connection structure of the weld strength control component;

[0079] Figure 18 A partial first-view three-dimensional connection structure diagram of the weld strength control component;

[0080] Figure 19 A schematic diagram of the partial second-view three-dimensional connection structure of the weld strength control component;

[0081] Figure 20A schematic diagram of the local third-person perspective three-dimensional connection structure of the weld strength control component;

[0082] Figure 21 A schematic diagram of a three-dimensional connection structure for elastic metal plates;

[0083] Figure 22 A schematic diagram of the three-dimensional connection structure of the support block and the slider;

[0084] Figure 23 This is a schematic diagram of the three-dimensional connection structure of the side support plate, the elastic metal plate, and the slider.

[0085] In the diagram: 1. Side frame; 2. Clamping device; 3. Welding arm; 4. Fine-tuning mechanism; 41. Machine box; 42. Support rod; 43. Center clamp; 44. Connecting arm; 45. Control rod; 5. Laser welding torch; 6. Weld strength control mechanism; 61. Molten pool cooling assembly; 611. Duct shell; 612. Connecting pipe; 613. Mounting frame; 62. Flux adjustment assembly; 621. Spiral pusher pipe; 622. Connecting hose; 623. Extrusion... Pressure chamber; 624, T-joint; 625, Extrusion nozzle; 63, Weld strength control component; 630, Inner groove; 631, Mounting block; 632, Slide rail; 633, Support block; 634, Side support plate; 635, Sleeve; 636, Slider; 637, First reciprocating motor; 638, Rubber column; 639, Elastic metal plate; 6311, Second reciprocating motor; 6312, Spring; 6313, Support plate; 6314, Rubber block. Detailed Implementation

[0086] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0087] refer to Figures 1 to 23 The automated welding equipment and welding process for the side frame of the agricultural machinery cab shown includes a clamping device 2 for clamping the workpiece and a welding arm 3 for performing welding. The upper end of the clamping device 2 clamps the side frame 1, and the welding arm 3 is provided on one side of the clamping device 2.

[0088] A fine-tuning mechanism 4 is fixedly installed at one end of the welding arm 3, and a laser welding gun 5 is installed inside the fine-tuning mechanism 4. The fine-tuning mechanism 4 can fine-tune the welding angle of the laser welding gun 5 to adapt to the structural curved surface of the side frame 1.

[0089] A weld strength control mechanism 6 is provided on one side of the laser welding gun 5. The weld strength control mechanism 6 includes a molten pool cooling component 61, a flux adjustment component 62, and a weld strength control component 63.

[0090] The molten pool cooling assembly 61 is fixedly installed at the bottom of the laser welding gun 5, and the molten pool cooling assembly 61 is used to guide inert gas to be blown onto the surface of the molten pool to gather and control the shape of the molten pool.

[0091] The flux adjustment assembly 62 is installed inside the molten pool cooling assembly 61, and the flux adjustment assembly 62 is used to push different amounts of flux according to the stress conditions of each part of the side frame 1.

[0092] The weld strength control component 63 is installed on the inner wall of the molten pool cooling component 61. The weld strength control component 63 is sleeved on the outlet of the molten pool cooling component 61 where the flux is discharged. The weld strength control component 63 controls the shape of the weld ejection.

[0093] It is worth noting that the automated welding process for the side frame of the agricultural machinery cab involves the following steps:

[0094] Workpiece clamping and path planning: The side frame 1 is fixed on the clamping device 2, and the welding arm 3 plans the welding path according to the structural surface of the side frame 1.

[0095] Dynamic angle fine adjustment: During the welding process, the fine adjustment mechanism 4 drives the control rod 45 through the electric telescopic rod inside the mechanical box 41 according to the curvature change of the welding path, which drives the V-shaped connecting arm 44 to rotate, and then adjusts the welding angle of the laser welding gun 5 inside the central clamp 43 through the support rod 42 to ensure that the laser beam is always perpendicular to the weld surface.

[0096] Molten pool protection and shape control: During the welding process, the molten pool cooling component 61 guides inert gas to blow onto the surface of the molten pool, which on the one hand protects the weld from oxidation, and on the other hand concentrates the shape of the molten pool through gas pressure;

[0097] Strength adaptive adjustment: The flux adjustment component 62 delivers different amounts of flux to the three-way pipe 624 through the spiral push pipe 621 or the extrusion chamber 623 according to the stress strength requirements of different parts of the side frame 1.

[0098] Weld morphology control: Based on the required amount of flux, the weld strength control component 63 controls the shape of the flux discharge.

[0099] Wide seam mode: When the weld seam is large, the weld seam strength control component 63 drives the slider 636 and the elastic metal plate 639 to drive the sleeve 635 and the extrusion nozzle 625 to shake and discharge material along both sides of the weld seam path, thereby widening the weld seam width.

[0100] High-strength mode: When it is necessary to increase the welding strength, the weld strength control component 63 drives the elastic metal plate 639 to deform, which drives the extrusion nozzle 625 to shake back and forth along the weld path to discharge the material, so that the flux is stacked at the weld. Combined with the rapid cooling inert gas of the molten pool cooling component 61, a high-strength weld overlay structure is formed.

[0101] The fine-tuning mechanism 4 includes a mechanical box 41, which is fixedly installed on one side of the welding arm 3. Three connecting arms 44 arranged in a circular array are rotatably installed at the bottom of the mechanical box 41, and the connecting arms 44 have a V-shaped structure.

[0102] A support rod 42 is rotatably mounted on one end of the connecting arm 44, and a central locking piece 43 is provided at the lower end of the three support rods 42.

[0103] A control rod 45 is rotatably mounted on the other end of the connecting arm 44. The control rod 45 extends into the interior of the machine box 41, and one end of the control rod 45 is fixedly connected to the electric telescopic rod inside the machine box 41. The telescopic rod controls the control rod 45 to stretch and rotate the connecting arm 44. The connecting arm 44 is V-shaped. When the connecting arm 44 rotates, it drives the support rod 42 to move. The laser welding gun 5, which is located inside the central clamp 43, adjusts the angle of the laser welding gun 5 according to the position of the support rod 42.

[0104] During the welding process, the fine-tuning mechanism 4 can adjust the angle of the laser welding gun 5 in the central clamp 43 by driving the support rod 42 through the linkage of the mechanical box 41, electric telescopic rod, control rod 45 and V-shaped connecting arm 44, according to the changes in the curved surface of the side frame 1.

[0105] This ensures that the laser beam is always perpendicular to the weld surface, effectively avoiding welding defects such as undercut and lack of fusion caused by angular deviation, and improving the welding adaptability and weld formation quality of workpieces with complex curved surface structures on the side walls of agricultural machinery cabs.

[0106] The molten pool cooling assembly 61 includes a mounting frame 613, which is fitted onto the bottom of the outer surface of the laser welding gun 5. Both sides of the mounting frame 613 are provided with connecting pipes 612, and the upper end of the connecting pipes 612 is connected to an external inert vent pipe.

[0107] Both connecting pipes 612 have a duct shell 611 at their lower ends, and the duct shell 611 is located on both sides of the laser welding gun 5. The outlet of the duct shell 611 that sprays out inert gas corresponds to the molten pool of the weld. The inert gas is guided by the duct shell 611 to be sprayed onto the surface of the molten pool.

[0108] Among them, the gas guidance and cooling of the molten pool cooling component 61 solves the common problems of molten pool collapse and oxidation in laser welding. On the one hand, the inert gas isolates the air and prevents the weld metal from oxidizing at high temperature, ensuring the purity of the weld. On the other hand, the gas pressure gathers the shape of the molten pool to prevent the liquid metal from flowing. Combined with the rapid cooling function, the weld grains are refined, further improving the mechanical properties of the welded joint.

[0109] The flux adjustment assembly 62 includes a spiral push tube 621 and an extrusion chamber 623. Both the spiral push tube 621 and the extrusion chamber 623 are existing technologies. The spiral push tube 621 uses a spiral push rod to push the flux inside, while the extrusion chamber 623 uses a piston to push the welding.

[0110] The lower end of the spiral push tube 621 is connected to a connecting hose 622, and the lower end of the connecting hose 622 is connected to a three-way tube 624. The connecting hose 622 ensures that the three-way tube 624 is flexibly connected so that the push of flux will not be affected when the three-way tube 624 vibrates.

[0111] One end of the three-way tube 624 is flexibly connected to the extrusion chamber 623, and the other end of the three-way tube 624 is connected to the extrusion nozzle 625 for extruding flux.

[0112] Among them, the flux adjustment component 62 solves the problem of the weld strength being singular and unable to match the stress requirements of different parts of the workpiece in the welding process. The flux adjustment component 62 can accurately control the flux metering delivered to the three-way pipe 624 according to the actual stress conditions of each part of the side frame 1 through the spiral push pipe 621 or the extrusion chamber 623.

[0113] In high-stress areas of the skeleton, such as connection points and corners, the amount of flux is increased to form high-strength welds, while the amount is reduced in low-stress areas to save materials. This adaptive adjustment optimizes material costs and improves the overall structural reliability and fatigue resistance of the skeleton.

[0114] The weld strength control component 63 includes a mounting block 631, which is fixedly installed between two duct shells 611. The lower end of the mounting block 631 has an inner groove 630. A slide rail 632 is provided inside the inner groove 630. A support block 633 is provided on the outer surface of the slide rail 632. Side support plates 634 are provided on both sides of the support block 633.

[0115] The weld strength control component 63 also includes a slider 636, which is slidably installed inside the slide rail 632. The lower end of the slider 636 is provided with an elastic metal plate 639 that penetrates the support block 633. The lower end of the elastic metal plate 639 is provided with a sleeve 635, which is sleeved on the outer surface of the tee pipe 624.

[0116] Rubber pillars 638 are provided on both sides of the lower end of the elastic metal plate 639, and a first reciprocating motor 637 is provided between the side support plate 634 and the rubber pillars 638.

[0117] Support plates 6313 are provided on the opposite sides of the two side support plates 634, and rubber blocks 6314 are provided on both sides of the elastic metal plate 639, with the support plates 6313 abutting against the inside of the rubber blocks 6314.

[0118] A second reciprocating motor 6311 is provided on one side of the elastic metal plate 639 for pushing the slider 636 to slide inside the slide rail 632, and one end of the second reciprocating motor 6311 is fixedly installed on one side of the support block 633. A spring 6312 is provided on the other side of the elastic metal plate 639 to assist the second reciprocating motor 6311 in pushing the elastic metal plate 639 to reciprocate.

[0119] The weld strength control component 63 controls the movement of the flux outlet in the following two ways:

[0120] When the weld is large, the weld strength control component 63 controls the flux outlet to vibrate and discharge flux along both sides of the weld path;

[0121] When it is necessary to increase the strength of the weld, the weld strength control component 63 controls the flux outlet to vibrate back and forth to discharge the flux.

[0122] Among them, the weld strength control component 63 and the extrusion nozzle 625 work together to generate welds of different shapes on the same workpiece.

[0123] Wide gap mode: For sealing and large gaps, the drive slider 636 and elastic metal plate 639 drive the sleeve 635 and extrusion nozzle 625 to vibrate along both sides of the weld, which expands the weld width and fills the larger assembly gap.

[0124] High-strength mode: For key stress points, the elastic metal plate 639 is driven to deform, which drives the extrusion nozzle 625 to vibrate back and forth along the weld, so that the flux forms a stack at the weld. Combined with the rapid cooling effect of the molten pool cooling component 61, a high-strength weld overlay structure is formed, which greatly improves the load-bearing capacity of key nodes.

[0125] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automated welding equipment for the side frame of an agricultural machinery cab, characterized in that: Clamping device (2), the upper end of which clamps the side frame (1); Welding arm (3) is disposed on one side of the clamping device (2); A fine-tuning mechanism (4) is fixedly installed at one end of the welding arm (3), and a laser welding gun (5) is provided inside the fine-tuning mechanism (4). A weld strength control mechanism (6) is disposed on one side of the laser welding gun (5); The fine-tuning mechanism (4) is used to fine-tune the welding angle of the laser welding gun (5) to adapt to the structural surface of the side frame (1), and the weld strength control mechanism (6) is used to adjust the welding strength according to the stress intensity of the side frame (1) during use. The weld strength control mechanism (6) includes: The molten pool cooling assembly (61) is fixedly installed at the bottom of the laser welding gun (5) to guide inert gas to be blown onto the surface of the molten pool to gather and regulate the shape of the molten pool, and to protect the weld from oxidation; The flux adjustment assembly (62) is installed inside the molten pool cooling assembly (61) and is used to push different amounts of flux according to the stress conditions of each part of the side frame (1) to adjust the welding strength of the weld. The weld strength control component (63) is installed on the inner wall of the molten pool cooling component (61) and sleeved on the flux discharge outlet in the flux adjustment component (62). By controlling the shaking mode of the flux outlet, the discharge shape of the flux is adjusted, thereby controlling the weld formation shape and strength.

2. The automated welding equipment for the side frame of the agricultural machinery cab according to claim 1, characterized in that: The fine-tuning mechanism (4) includes: The machine box (41) is fixedly installed on one side of the welding arm (3); The connecting arms (44) are three in number and arranged in a circular array. They are rotatably mounted on the bottom of the mechanical box (41) and have a V-shaped structure. The support rod (42) is rotatably mounted on one end of the connecting arm (44). The lower ends of the three support rods (42) are provided with a central clamp (43), and the laser welding gun (5) is fixedly installed inside the central clamp (43). The control lever (45) is rotatably mounted on the other end of the connecting arm (44), extends into the mechanical box (41) and is fixedly connected to the electric telescopic rod inside it; The electric telescopic rod drives the control rod (45) to stretch, which in turn drives the V-shaped connecting arm (44) to rotate, thereby driving the support rod (42) to move, so that the laser welding gun (5) inside the central clamp (43) can adjust its angle.

3. The automated welding equipment for the side frame of the agricultural machinery cab according to claim 1, characterized in that: The molten pool cooling assembly (61) includes: The mounting frame (613) is fitted onto the bottom of the outer surface of the laser welding gun (5); Two connecting pipes (612) are provided on both sides of the mounting frame (613), with their upper ends connected to the external inert vent pipe; The duct shell (611) is located at the lower end of the connecting pipe (612) and on both sides of the laser welding gun (5). The air outlet of the duct shell (611) corresponds to the weld pool and is used to guide inert gas to be sprayed onto the surface of the weld pool.

4. The automated welding equipment for the side frame of the agricultural machinery cab according to claim 3, characterized in that: The flux conditioning assembly (62) includes: The spiral push tube (621) has a spiral push rod inside, and the spiral push tube (621) is fixedly installed inside the mounting frame (613); The extrusion chamber (623) is equipped with a piston inside; The tee pipe (624) is shaped like the letter Y. A connecting hose (622) is connected between the spiral push tube (621) and the three-way tube (624), and the three-way tube (624) is flexibly connected to the extrusion chamber (623) through a rubber tube; The extrusion nozzle (625) is connected to the other end of the tee tube (624); The spiral push tube (621) delivers flux to the tee tube (624) through the connecting hose (622), and the piston of the extrusion chamber (623) extrudes a large amount of flux through the extrusion nozzle (625) for high-strength welding.

5. The automated welding equipment for the side frame of the agricultural machinery cab according to claim 4, characterized in that: The weld strength control component (63) includes: The mounting block (631) is fixedly installed between the two duct shells (611), and the lower end of the mounting block (631) is provided with an inner groove (630). The slide rail (632) is located inside the inner groove (630), and a support block (633) is provided on the outer surface of the slide rail (632). Side support plates (634) are provided on both sides of the support block (633); The slider (636) is slidably mounted inside the slide rail (632); An elastic metal plate (639) is disposed at the lower end of the slider (636) and passes through the support block (633). Rubber columns (638) are provided at the lower ends of both sides of the elastic metal plate (639), and rubber blocks (6314) are provided at the middle of both sides of the elastic metal plate (639). A sleeve (635) is fitted onto the outer surface of a tee pipe (624) and connected to the lower end of an elastic metal plate (639); The support plate (6313) is disposed on the opposite side of the side support plate (634) and abuts against the inside of the rubber block (6314) to support the deformation movement of the elastic metal plate (639); The first reciprocating motor (637) is located between the side support plate (634) and the rubber column (638) and is used to drive the elastic metal plate (639) to deform and vibrate.

6. The automated welding equipment for the side frame of the agricultural machinery cab according to claim 5, characterized in that: The first reciprocating motor (637) drives the elastic metal plate (639) to deform, causing the extrusion nozzle (625) connected to the sleeve (635) and the three-way pipe (624) to vibrate, controlling the flux to vibrate and be discharged along both sides of the weld path.

7. The automated welding equipment for the side frame of the agricultural machinery cab according to claim 6, characterized in that: The weld strength control component (63) further includes: The second reciprocating motor (6311) is located on one side of the elastic metal plate (639) and is used to push the slider (636) to slide inside the slide rail (632); A spring (6312) is located on the other side of the elastic metal plate (639) to assist the second reciprocating motor (6311) in driving the elastic metal plate (639) to reciprocate.

8. The automated welding equipment for the side frame of the agricultural machinery cab according to claim 7, characterized in that: The control logic of the weld strength control component (63) is as follows: When the weld of the side frame (1) is large, the first reciprocating motor (637) is controlled to drive the flux outlet to vibrate along both sides of the weld path. When it is necessary to increase the welding strength, the second reciprocating motor (6311) is controlled to drive the flux outlet to vibrate back and forth along the weld path, and the sleeve (635) drives the three-way pipe (624) and the extrusion nozzle (625) to stack the flux.

9. The automated welding equipment for the side frame of the agricultural machinery cab according to claim 4, characterized in that: The working logic of the flux adjustment component (62) is as follows: The flux is continuously delivered through the spiral push tube (621); When high-strength welding is required, the piston of the extrusion chamber (623) pushes the flux into the three-way pipe (624), causing the extrusion nozzle (625) to discharge a large amount of flux; At the same time, the duct shell (611) sprays inert gas to quickly cool the excess welding liquid in the molten pool and trim the edge of the molten pool.

10. An automated welding process for the side frame of an agricultural machinery cab, employing the automated welding equipment for the side frame of an agricultural machinery cab as described in any one of claims 1-9, characterized in that: S1, During the welding process, the fine-tuning mechanism (4) adjusts the welding angle of the laser welding gun (5) according to the curvature change of the welding path, while the molten pool cooling component (61) guides the inert gas to blow onto the surface of the molten pool during the welding process, on the one hand protecting the weld from oxidation, and on the other hand gathering the shape of the molten pool through gas pressure. S2, while the flux adjustment component (62) delivers different amounts of flux according to the stress strength requirements of different parts of the side frame (1), and the weld strength control component (63) controls the discharge shape of the flux. When the weld is large, the weld strength control component (63) controls the flux adjustment component (62) to shake and discharge along both sides of the weld path to expand the weld width. S3, when it is necessary to increase the welding strength, the weld strength control component (63) controls the flux adjustment component (62) to shake and discharge the flux along the weld path, so that the flux is stacked at the weld, and combined with the rapid cooling inert gas of the molten pool cooling component (61), a high-strength weld overlay structure is formed.

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