Automatic welding equipment and welding method for crisscross supporting platform

Abstract

The invention discloses automatic welding equipment and a welding method for a crisscross supporting platform. The welding method comprises the following steps: S1, preparing materials; s2, setting a welding mode and parameters; s3, primary assembly is conducted; s4, primary welding; s5, secondary assembly is conducted; s6, secondary welding is conducted; s7, post-welding treatment is conducted; s8, hoisting and transferring a welding finished product; welding equipment needed by welding comprises a conveying platform, a movable positioning platform, a positioning frame, a side plate positioning mechanism, a conveying mechanism, a welding robot I, a rotary mechanical arm, a rib plate positioning mechanism, an upper platform plate and a lower platform plate. The conveying platform is arranged at the rear end of the whole device, the movable positioning platform is arranged at the front end of the conveying platform and arranged between the upper platform plate and the lower platform plate, the side plate positioning mechanisms are arranged between the positioning frames, the conveying mechanisms are arranged on the positioning frames, and the welding robot I and the rotary mechanical arm are arranged on the corresponding conveying mechanisms correspondingly. A rib plate positioning mechanism is arranged on the lower portion of the rotary mechanical arm.

Description

Technical Field

[0001] The present invention belongs to the technical field of automated welding, and particularly relates to an automated welding device and a welding method for a cross support platform. Background Art

[0002] The cross support platform is a structural design widely used in fields such as construction, bridges, and mechanical engineering. It is mainly composed of a platform bottom plate and a pair of platform side plates welded together. A number of stiffening plates are welded on the platform bottom plate to further increase the structural stability and reduce the deformation amount. The cross support platform is large in size, and different orientations of blank assembly and clamping fixation are required during welding. The plates are clamped and placed by a lifting machine, and blank assembly is carried out in cooperation with a ground lifting machine. The position accuracy of the blank assembly cannot be guaranteed, and the time-consuming for single clamping of workpieces for blank assembly is long, resulting in low work efficiency. During the welding process, there is a problem that the platform bottom plate absorbs a large amount of heat in a short time, causing thermal deformation of the platform bottom plate. After welding a large-sized cross support platform, the overall flatness of the platform is not high, and the weld seam stress deformation at the welding position is prone to cracking, unable to guarantee the welding quality.

[0003] After retrieval, a kind of I-shaped member automated welding device and welding method with the authorized publication number of CN 118342179 A in the prior art includes an I-shaped member. A sliding welding platform is erected on the top of the I-shaped member. Sliding seats are fixed on both sides of the bottom of the sliding welding platform, and the sliding welding platform is installed on the I-shaped member through the sliding seats on both sides. A rotary mechanism is slidably installed on the top of the sliding welding platform, and a dragging and teaching collaborative robot is installed on the top of the rotary mechanism. This device completes automated welding operations on the I-shaped member according to a specific welding sequence through the sliding welding platform, but this device cannot adjust the welding position of the workpiece and cannot guarantee the welding size.

[0004] After retrieval, a kind of automobile body automated welding device with the authorized publication number of CN 118926796 A in the prior art includes a welding platform. The body clamping mechanism can adjust the clamping member into a rectangular body tube clamping state or a circular body tube clamping state through an adjusting member. A clamping and grinding integrated mechanism is arranged on the positioning and calibration mechanism. The positioning and calibration mechanism flexibly varies the distance of the calibration positioning pin for the specific welding position. The fixing component keeps the positioning pin stable during welding, and the grinding component processes the weld seam and weld bead generated after welding. This device keeps the positioning pin stable during welding through the fixing component, but this device cannot solve the problem of deformation caused by the parts being heated in a short time during welding. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an automated welding device and a welding method for a cross-support platform. The flip positioning mechanism cooperates with the downward positioning mechanism to position the rear end of the platform bottom plate, and presses it down and fixes it on the lifting plate I, limits the platform bottom plate, and ensures the positioning of assembly and welding; the side centering mechanism cooperates with the side plate clamping mechanism to take the platform side plate out from the workpiece rack, ensures that the opening on the clamped platform side plate cooperates with the boss set on the platform bottom plate, and drives the platform side plate to be assembled once; the rib plate positioning mechanism cooperates with the fine-tuning mechanism to clamp and take out the platform rib plate from the workpiece rack, adjusts the distance between the two sides of the platform rib plate after clamping according to the welding position, and assembles the platform rib plate for a second time, further completing the automated assembly and welding of the cross-support platform, ensuring the weld quality and the overall flatness of the platform, and solving the technical problem of stress deformation weld cracking after welding.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] An automated welding device and welding method for a cross support platform, the specific welding method is as follows:

[0008] S1. Material preparation for the support platform: The support platform includes the platform bottom plate, platform side plate and platform rib plate. The thickness of the platform bottom plate is 12mm, the thickness of the platform side plate is 10mm, and the thickness of the platform rib plate is 8mm. The material is Q235B steel plate, which is cut by laser. After cutting, the burrs and flash are polished, and the surface of the steel plate is cleaned. The straightness deviation of the cut is ≤1‰, ensuring that the cut is smooth and flat and meets the welding standards;

[0009] S2. Welding method and parameter setting: The welding method adopts gas shielded welding, and the welding wire that matches the base material is selected. The specific model is ER50-6, the welding wire diameter is 1.2-1.6mm, and the Ar+CO 2 As a protective gas;

[0010] S3, primary assembly: the conveying platform conveys the platform bottom plate to the mobile positioning platform, the mobile positioning platform positions the platform bottom plate, the side plate positioning mechanism clamps the platform side plate, and adjusts the position of the platform side plate to ensure that the opening on the platform side plate is connected with the boss set on the platform bottom plate, and the platform side plate and the platform bottom plate are assembled;

[0011] S4. Primary welding: Use the welding robot II in the mobile welding mechanism to perform intermittent welding on the overlap between the platform side plate and the platform bottom plate. Set the welding current to 120-200A, welding voltage to 22-26V, gas flow to 12-15L / min, weld length to 10-20mm, weld spacing to 200-300mm, weld leg size ≥6mm, and fix the platform bottom plate and side plate through intermittent welding to reduce heat input and control deformation.

[0012] S5. Secondary blank assembly: Through the movement of the positioning platform, the semi-finished product after welding and fixing the platform side plate and the platform bottom plate is transported forward. The fixing mechanism clamps the platform side plate and the platform bottom plate to reduce the deformation amount. The rib plate positioning mechanism grabs the platform rib plate and adjusts the position of the platform rib plate, and then assembles the platform rib plate and the platform bottom plate;

[0013] S6. Secondary welding: The platform rib plate and the lap joint of the platform bottom plate and the platform side plate are fully welded by welding robot I. The welding current is 200 - 300A, the welding voltage is 26 - 32V, the gas flow rate is 15 - 20L / min, the welding speed is 200 - 500mm / min. When welding robot I is welding, the welding torch tilts backward, and the welding torch forms an angle of 10° - 15° with the welding workpiece, increasing the penetration depth, reducing the intrusion of air, and reducing the probability of pores. The welding process complies with the GB 50661 - 2011 standard;

[0014] S7. Post-welding treatment: The moving positioning platform, the side plate positioning mechanism, and the rib plate positioning mechanism reset and retract; Remove the welding slag and spatter on the surface of the support platform, grind the welding bead, and check the appearance quality of the weld to ensure that there are no defects such as leakage and pores;

[0015] S8. After the post-welding treatment is completed, transfer the welded finished product by hoisting.

[0016] An automated welding device for a cross-shaped support platform, comprising a conveying platform, a moving positioning platform, a positioning frame, a side plate positioning mechanism, a conveying mechanism, welding robot I, a rotating robotic arm, a rib plate positioning mechanism, an upper platform plate, a lower platform plate, a fixing mechanism, and a workpiece rack; The conveying platform is arranged at the rear end of the overall device. The front end of the conveying platform is provided with a moving positioning platform. The moving positioning platform is arranged between the upper platform plate and the lower platform plate. The positioning frame is arranged on both sides of the moving positioning platform. The side plate positioning mechanism is arranged between the positioning frames. The conveying mechanism is arranged on the positioning frame. Welding robot I and the rotating robotic arm are respectively arranged on the corresponding conveying mechanisms. The lower part of the rotating robotic arm is provided with a rib plate positioning mechanism. The fixing mechanism is arranged at the front end of the moving positioning platform. The workpiece racks are arranged on both sides of the positioning frame; The conveying mechanism includes motor I, wire block I, and lead screw I; Motor I is arranged at the front end of the positioning frame. The output end of motor I is connected to lead screw I. Wire block I is matched with lead screw I. The left and right groups of wire blocks I are respectively connected to welding robot I and the rotating robotic arm; The cross-shaped support platform is composed of a platform bottom plate, a platform side plate, and a platform rib plate welded together.

[0017] The mobile positioning platform includes a lifting plate I, a moving plate, an electric push rod I, a motor II, a motor mounting plate I, a lead screw II, a lead block II, a limiting shaft I, and a connecting slider I. There is an opening on the lifting plate I. An electric push rod I is provided at the lower part of the lifting plate I. A moving plate is provided at the lower part of the electric push rod I. The motor mounting plate I is arranged at the lower part of the upper platform plate. The motor II is arranged at the upper part of the motor mounting plate I. The output end of the motor II is connected to the lead screw II. A lead block II is provided on the lead screw II. The lead block II is fixedly connected to the moving plate. Limiting shafts I are provided on both sides of the lead screw II. Connecting sliders I are provided on the limiting shafts I. The connecting sliders I are fixedly connected to the moving plate.

[0018] A flipping and positioning mechanism is arranged in the opening on the lifting plate I. The flipping and positioning mechanism includes a positioning block, a Y-shaped chute, a limiting shaft II, a connecting plate I, a connecting rod I, a connecting rod II, a connecting shaft I, a connecting shaft II, a motor III, and a limiting plate I. A Y-shaped chute is provided on the positioning block. The motor III is arranged on one side of the positioning block. The output end of the motor III is connected to the connecting shaft I. The connecting shaft I is connected to the connecting rod II. The connecting rod II is connected to the connecting rod I through a pin shaft. The connecting rod I is connected to the connecting plate I. The two groups of connecting rods I are connected through the connecting shaft II. The connecting shaft II simultaneously passes through the connecting plate I and is arranged in the Y-shaped chute on the positioning block. A limiting shaft II is provided on the connecting plate I. The limiting shaft II and the connecting shaft II are arranged in the Y-shaped chute on the positioning block and cooperate with the Y-shaped chute. A limiting plate I is also provided on the connecting plate I. The positioning block is fixed at the lower part of the lifting plate I.

[0019] A downward pressing and positioning mechanism is arranged on the limiting plate I. The downward pressing and positioning mechanism includes a motor IV, a transmission shaft I, a connecting shaft III, a connecting rod III, a lower pressing plate, a chute, a limiting shaft III, and a motor mounting plate II. The motor mounting plate II is arranged at the lower part of the limiting plate I. The motor IV is mounted on the motor mounting plate II. The output end of the motor IV is connected to the transmission shaft I. The transmission shaft I is connected to the connecting rod III. The connecting rod III is connected to the lower pressing plate. A chute is provided on the lower pressing plate. The two groups of lower pressing plates are connected through the connecting shaft III. The lower pressing plate is arranged at the opening on the limiting plate I. The limiting shaft III is fixed in the opening on the limiting plate I. At the same time, the limiting shaft III is arranged in the chute provided on the lower pressing plate.

[0020] The side plate positioning mechanism includes a motor V, a positioning plate I, a bidirectional lead screw, an electric push rod II, a limiting plate II, a motor VI, a lifting plate II, a transmission shaft II, a support plate I, a helical gear I, a motor VII, and a transmission shaft III. The motor V is arranged on one side of the limiting plate II. The output end of the motor V is connected to the bidirectional lead screw. The positioning plate I is arranged on the bidirectional lead screw. The electric push rod II is arranged on the positioning plate I. A lifting plate II is provided at the lower part of the electric push rod II. A motor VI is arranged on the lifting plate II. The motor VI controls the rotation of the transmission shaft II. The transmission shaft II is arranged in the support plate I and is rotatably connected to the support plate I. Helical gears I are provided at both ends of the transmission shaft II. The motor VII is arranged at the lower part of the lifting plate II. The motor VII controls the rotation of the transmission shaft III.

[0021] Above the lifting plate II, there is a mobile welding mechanism, which includes a motor VIII, a transmission shaft IV, a rotating frame, a motor IX, a lead screw III, a lead screw block III, and a welding robot II. The output end of the motor VIII is connected to the transmission shaft IV. There is a rotating frame on the transmission shaft IV. There is a lead screw III below the rotating frame. The lead screw block III is arranged on the lead screw III. The motor IX is installed on one side of the rotating frame. The output end of the motor IX is connected to the lead screw III. There is a welding robot II below the lead screw block III.

[0022] On both sides of the lifting plate II, there is a side centering mechanism, which includes a helical gear II, a connecting shaft IV, a support plate II, a connecting rod IV, a positioning plate II, an electric push rod III, a connecting plate II, a spring I, and a positioning plate III. The helical gear II is arranged on the connecting shaft IV. The connecting shaft IV is arranged on the support plate II and is rotatably connected to the support plate II. The support plate II is fixed on the lifting plate II. There is a connecting rod IV on the connecting shaft IV. There is a positioning plate II between two groups of connecting rods IV. There is a connecting plate II below the connecting rod IV. The connecting plate II is connected to the positioning plate III. The electric push rod III is arranged below the positioning plate II. The ejecting end of the electric push rod III is arranged above the connecting plate II. There is a spring I between the connecting plate II and the positioning plate III.

[0023] Below the lifting plate II, there is a side plate clamping mechanism, which includes a gear I, a positioning plate IV, a connecting rod V, a connecting rod VI, a connecting rod VII, a limiting shaft IV, a spring II, and a positioning plate V. The gear I is arranged on the positioning plate IV. The positioning plate IV is arranged below the lifting plate II. The gear I is connected to the connecting rod V. The connecting rod V is connected to the connecting rod VII. There is also a connecting rod VI between the connecting rod VII and the positioning plate IV. There is a limiting shaft IV below the connecting rod VII. There is a positioning plate V at the top of the limiting shaft IV. There is a spring II between the positioning plate V and the connecting rod VII. The spring II is sleeved on the limiting shaft IV.

[0024] The fixing mechanism includes an electric push rod IV, a connecting slider II, a connecting plate III, a connecting shaft V, a connecting slider III, a limiting chute, a limiting plate III, a limiting plate IV, a rack I, a connecting plate IV, a gear II, and a rack II. The electric push rod IV is arranged on the lower platform plate. The ejecting end of the electric push rod IV is provided with a connecting slider II. There is a connecting plate III on the connecting slider II and is rotatably connected to the connecting plate III. The connecting plate III is connected to the connecting slider III through the connecting shaft V. The connecting slider III is arranged in the limiting chute. The limiting chute is fixed on the lower platform plate. There is a limiting plate III on the connecting slider III. There is a rack II at the front end of the connecting slider II. The rack II meshes with the gear II. The gear II is arranged in the connecting plate IV. The connecting plate IV is fixed to the lower part of the upper platform plate. The gear II meshes with the rack I. The rack I is connected to the limiting plate IV.

[0025] The rib positioning mechanism includes a connecting seat, a positioning plate VI, a motor X, a gear III, a gear IV, a positioning plate VII, an electric push rod V, a lifting plate III, a motor XI, a lead screw IV, a connecting column, and a lifting plate IV. A positioning plate VI is provided at the lower part of the connecting seat. The motor X is arranged on the positioning plate VI. The output end of the motor X is connected to the gear IV. The gear IV meshes with the gear III. A positioning plate VII is provided below the gear III. An electric push rod V is provided on the positioning plate VII. A lifting plate III is provided below the electric push rod V. A motor XI is provided on the lifting plate III. The output end of the motor XI is connected to the lead screw IV. A connecting column is fixed below the lifting plate III. The lifting plate IV is matched with the lead screw IV and is slidably connected to the connecting column.

[0026] A rib clamping mechanism is provided below the lifting plate IV. The rib clamping mechanism includes a positioning plate VIII, a connecting rod VIII, a connecting rod IX, a connecting rod X, and a positioning plate IX. The positioning plate VIII is fixed to the lower part of the connecting column. The connecting rod VIII is arranged on both sides of the lifting plate IV. A connecting rod IX and a connecting rod X are provided below the positioning plate VIII. The connecting rod VIII, the connecting rod IX, and the connecting rod X are simultaneously connected to the positioning plate IX.

[0027] A fine-tuning mechanism is provided below the lifting plate IV. The fine-tuning mechanism includes a support plate III, a motor XII, a motor mounting plate III, a gear V, a rack V, a rack VI, a connecting plate V, a positioning plate X, a motor XIII, and a limiting rod. The support plate III is arranged between the connecting plates V. The motor mounting plate III is arranged on the support plate III. The motor XII is mounted on the motor mounting plate III. The output end of the motor XII is connected to the gear V. The gear V meshes with the rack V and the rack VI. Motors XIII are provided at the tops of the rack V and the rack VI. The output end of the motor XIII controls the rotation of the limiting rod. The positioning plate X is arranged between two adjacent groups of connecting plates V.

[0028] The beneficial effects of the present invention compared with the prior art are as follows:

[0029] The flipping positioning mechanism cooperates with the pressing positioning mechanism to position the rear end of the platform bottom plate and press it and fix it on the lifting plate I to limit the platform bottom plate and ensure the positioning of blank assembling and welding. The side centering mechanism cooperates with the side plate clamping mechanism to take out the platform side plate from the workpiece rack, ensure that the opening on the taken platform side plate matches the boss provided on the platform bottom plate, and drive the platform side plate to perform primary blank assembling. The fixing mechanism clamps and positions the platform bottom plate and the platform side plate from three sides, reduces the deformation amount during welding, and reduces the error caused by the offset of the workpiece during the welding process. The rib positioning mechanism cooperates with the fine-tuning mechanism to clamp and take out the platform rib from the workpiece rack, adjust the distance between the two sides of the clamped platform rib according to the welding position, perform secondary blank assembling on the platform rib, further complete the automatic blank assembling and automatic welding of the cross-shaped support platform, ensure the weld quality and the overall flatness of the platform, and solve the technical problems of stress deformation and weld cracking after welding. Description of the Drawings

[0030] Appendix Figure 1Schematic diagram of the structure of an automated welding device for a cross-shaped support platform of the present invention Figure 1 ;

[0031] Appendix Figure 2 Schematic diagram of the structure of an automated welding device for a cross-shaped support platform of the present invention Figure 2 ;

[0032] Appendix Figure 3 It is the appendix Figure 2 Schematic diagram of the structure of the mobile positioning platform in the appendix Figure 1 ;

[0033] Appendix Figure 4 It is the appendix Figure 2 Schematic diagram of the structure of the mobile positioning platform in the appendix Figure 2 ;

[0034] Appendix Figure 5 It is the appendix Figure 2 Schematic diagram of the structure of the mobile positioning platform in the appendix Figure 3 ;

[0035] Appendix Figure 6 It is the appendix Figure 2 Schematic diagram of the structure of the mobile positioning platform in the appendix Figure 4 ;

[0036] Appendix Figure 7 It is the appendix Figure 2 Schematic diagram of the structure of the mobile positioning platform in the appendix Figure 5 ;

[0037] Appendix Figure 8 It is the appendix Figure 2 Schematic diagram of the structure of the mobile positioning platform in the appendix Figure 6 ;

[0038] Appendix Figure 9 It is the appendix Figure 2 Schematic diagram of the structure of the mobile positioning platform in the appendix Figure 7 ;

[0039] Appendix Figure 10 It is the appendix Figure 2 Schematic diagram of the structure of the side plate positioning mechanism in the appendix Figure 1 ;

[0040] Appendix Figure 11 It is the appendix Figure 2 Schematic diagram of the structure of the side plate positioning mechanism in the appendix Figure 2 ;

[0041] Appendix Figure 12 It is the appendix Figure 2 Schematic diagram of the structure of the side plate positioning mechanism in the appendix Figure 3 ;

[0042] Appendix Figure 13 It is the appendix Figure 2 Schematic diagram of the structure of the side plate positioning mechanism in the appendix Figure 4 ;

[0043] Appendix Figure 14 This is the appendix Figure 2 Schematic diagram of the middle side plate positioning mechanism Figure 5 ;

[0044] Appendix Figure 15 This is the appendix Figure 1 Schematic diagram of the middle fixing mechanism Figure 1 ;

[0045] Appendix Figure 16 This is the appendix Figure 1 Schematic diagram of the middle fixing mechanism Figure 2 ;

[0046] Appendix Figure 17 This is the appendix Figure 1 Schematic diagram of the middle rib plate positioning mechanism Figure 1 ;

[0047] Appendix Figure 18 This is the appendix Figure 1 Schematic diagram of the middle rib plate positioning mechanism Figure 2 ;

[0048] Appendix Figure 19 This is the appendix Figure 1 Schematic diagram of the middle rib plate positioning mechanism Figure 3 ;

[0049] Appendix Figure 20 Schematic diagram of the cross - cross support platform Figure 1 ;

[0050] Appendix Figure 21 Schematic diagram of the cross - cross support platform Figure 2 ;

[0051] In the figure: 11, conveying platform; 12, mobile positioning platform; 13, positioning frame; 14, side plate positioning mechanism; 15, conveying mechanism; 16, welding robot I; 17, rotating robotic arm; 18, rib plate positioning mechanism; 19, upper platform plate; 20, lower platform plate; 21, fixing mechanism; 22, workpiece holder; 1101, motor I; 1102, wire block I; 1103, lead screw I; 101, lifting plate I; 102, moving plate; 103, flipping and positioning mechanism; 104, downward pressing and positioning mechanism; 105, electric push rod I; 106, motor II; 107, motor mounting plate I; 108, lead screw II; 109, wire block II; 110, limit shaft I; 111, connecting slider I; 1030, positioning block; 1031, Y-shaped chute; 1032, limit shaft II; 1033, connecting plate I; 1034, connecting rod I; 1035, connecting rod II; 1036, connecting shaft I; 1037, connecting shaft II; 1038, motor III; 1039, limit plate I; 1041, motor IV; 1042, drive shaft I; 1043, connecting shaft III; 1044, connecting rod III; 1045, lower pressing plate; 1046, chute; 1047, limit shaft III; 1048, motor mounting plate II;

[0052] 201, motor V; 202, positioning plate I; 203, bidirectional lead screw; 204, electric push rod II; 205, limit plate II; 206, motor VI; 207, lifting plate II; 208, mobile welding mechanism; 209, side alignment mechanism; 210, side plate clamping mechanism; 211, drive shaft II; 212, support plate I; 213, helical gear I; 214, motor VII; 215, drive shaft III; 2081, motor VIII; 2082, drive shaft IV; 2083, rotating frame; 2084, motor IX; 2085, lead screw III; 2086, wire block III; 2087, welding robot II; 2091, helical gear II; 2092, connecting shaft IV; 2093, support plate II; 2094, connecting rod IV; 2095, positioning plate II; 2096, electric push rod III; 2097, connecting plate II; 2098, spring I; 2099, positioning plate III; 2101, gear I; 2102, positioning plate IV; 2103, connecting rod V; 2104, connecting rod VI; 2105, connecting rod VII; 2106, limit shaft IV; 2107, spring II; 2108, positioning plate V;

[0053] 301, electric push rod IV; 302, connecting slider II; 303, connecting plate III; 304, connecting shaft V; 305, connecting slider III; 306, limit chute; 307, limit plate III; 308, limit plate IV; 309, rack I; 310, connecting plate IV; 311, gear II; 312, rack II;

[0054] 401. Connecting seat; 402. Positioning plate VI; 403. Motor X; 404. Gear III; 405. Gear IV; 406. Positioning plate VII; 407. Electric push rod V; 408. Lifting plate III; 409. Motor XI; 410. Lead screw IV; 411. Connecting column; 412. Lifting plate IV; 413. Rib plate clamping mechanism; 414. Fine adjustment mechanism; 4131. Positioning plate VIII; 4132. Link VIII; 4133. Link IX; 4134. Link X; 4135. Positioning plate IX; 4140. Support plate III; 4141. Motor XII; 4142. Motor mounting plate III; 4143. Gear V; 4144. Rack V; 4145. Rack VI; 4146. Connecting plate V; 4147. Positioning plate X; 4148. Motor XIII; 4149. Limit rod; 501. Platform bottom plate; 502. Platform side plate; 503. Platform rib plate. Specific implementation mode

[0055] For the convenience of understanding by those skilled in the art, the technical solutions of the present invention will be further specifically described below in conjunction with the attached Figure 1-21 , drawings.

[0056] An automatic welding equipment and welding method for a cross - support platform are as follows:

[0057] S1. Preparation of support platform materials: The support platform includes a platform bottom plate, platform side plates, and platform rib plates. The thickness of the platform bottom plate is 12 mm, the thickness of the platform side plates is 10 mm, and the thickness of the platform rib plates is 8 mm. The material used is Q235B steel plate. Laser cutting is used, and after cutting, the burrs and flash are ground, and the surface of the steel plate is cleaned. The straightness deviation of the cut is ≤1‰ to ensure that the cut is smooth and flat and meets the welding standard;

[0058] S2. Welding method and parameter setting: The welding method uses gas shielded welding, and a welding wire matching the base material is selected. The specific model is ER50 - 6, the wire diameter is 1.2 - 1.6 mm, and Ar + CO 2 is used as the shielding gas;

[0059] S3. Primary blanking: The conveying platform conveys the platform bottom plate to the mobile positioning platform. The mobile positioning platform positions the platform bottom plate. The side plate positioning mechanism clamps the platform side plates and adjusts their positions to ensure that the openings on the platform side plates are docked with the bosses provided on the platform bottom plate, and the platform side plates and the platform bottom plate are blanked;

[0060] S4. Primary Welding: By moving the welding robot II in the welding mechanism, intermittent welding is performed at the lap joint of the platform side plate and the platform bottom plate. Set the welding current to 120 - 200 A, the welding voltage to 22 - 26 V, the gas flow rate to 12 - 15 L / min, the weld length to 10 - 20 mm, the weld spacing to 200 - 300 mm, and the weld leg size ≥ 6 mm. Fix the platform bottom plate and the side plate through intermittent welding to reduce heat input and control deformation;

[0061] S5. Secondary Blank Assembly: By moving the positioning platform, the semi-finished product after welding and fixing the platform side plate and the platform bottom plate is transported forward. The fixing mechanism clamps the platform side plate and the platform bottom plate to reduce the deformation amount. The rib plate positioning mechanism grabs the platform rib plate and adjusts the position of the platform rib plate to assemble the platform rib plate with the platform bottom plate;

[0062] S6. Secondary Welding: Full welding is performed on the platform rib plate, and the lap joint of the platform bottom plate and the platform side plate by the welding robot I. The welding current is 200 - 300 A, the welding voltage is 26 - 32 V, the gas flow rate is 15 - 20 L / min, and the welding speed is 200 - 500 mm / min. When the welding robot I is welding, the welding torch is tilted backward, and the welding torch forms an angle of 10° - 15° with the welding workpiece to increase the penetration depth, reduce air intrusion, and lower the porosity probability. The welding process complies with the GB 50661 - 2011 standard;

[0063] S7. Post-welding Treatment: The positioning platform, side plate positioning mechanism, and rib plate positioning mechanism are reset and retracted; Remove the welding slag and spatter on the surface of the support platform, grind the weld bead, and check the appearance quality of the weld to ensure that there are no defects such as leakage and porosity;

[0064] S8. After the post-welding treatment is completed, transfer the welded finished product by hoisting.

[0065] An automatic welding device for a cross-support platform, comprising a conveying platform 11, a moving and positioning platform 12, a positioning frame 13, a side plate positioning mechanism 14, a conveying mechanism 15, a welding robot I 16, a rotating robotic arm 17, a rib plate positioning mechanism 18, an upper platform plate 19, a lower platform plate 20, a fixing mechanism 21, and a workpiece holder 22; the conveying platform 11 is arranged at the rear end of the overall device, the front end of the conveying platform 11 is provided with the moving and positioning platform 12, the moving and positioning platform 12 is arranged between the upper platform plate 19 and the lower platform plate 20, the positioning frame 13 is arranged on both sides of the moving and positioning platform 12, the side plate positioning mechanism 14 is arranged between the positioning frames 13, the conveying mechanism 15 is arranged on the positioning frame 13, the welding robot I 16 and the rotating robotic arm 17 are respectively arranged on the corresponding conveying mechanisms 15, the lower part of the rotating robotic arm 17 is provided with the rib plate positioning mechanism 18, the fixing mechanism 21 is arranged at the front end of the moving and positioning platform 12, and the workpiece holder 22 is arranged on both sides of the positioning frame 13; the conveying mechanism 15 includes a motor I 1101, a wire block I 1102, and a lead screw I 1103; the motor I 1101 is arranged at the front end of the positioning frame 13, the output end of the motor I 1101 is connected to the lead screw I 1103, the wire block I 1102 is matched with the lead screw I 1103, the left and right groups of wire blocks I 1102 are respectively connected to the welding robot I 16 and the rotating robotic arm 17, and the motor I 1101 drives the welding robot I 16 and the rotating robotic arm 17 to move along the direction of the lead screw I 1103 through the wire block I 1102 and the lead screw I 1103 to adjust the positions of the welding robot I 16 and the rotating robotic arm 17; the cross-support platform is welded and composed of a platform bottom plate 501, a platform side plate 502, and a platform rib plate 503.

[0066] The mobile positioning platform 12 includes a lifting plate I 101, a moving plate 102, an electric push rod I 105, a motor II 106, a motor mounting plate I 107, a lead screw II 108, a lead screw block II 109, a limiting shaft I 110, and a connecting slider I 111. An opening is provided on the lifting plate I 101. The lower part of the lifting plate I 101 is provided with the electric push rod I 105. The lower part of the electric push rod I 105 is provided with the moving plate 102. The motor mounting plate I 107 is arranged under the upper platform plate 19. The motor II 106 is arranged on the upper part of the motor mounting plate I 107. The output end of the motor II 106 is connected to the lead screw II 108. The lead screw II 108 is provided with the lead screw block II 109. The lead screw block II 109 is fixedly connected to the moving plate 102. Limiting shafts I 110 are arranged on both sides of the lead screw II 108. The limiting shafts I 110 are provided with the connecting sliders I 111. The connecting sliders I 111 are fixedly connected to the moving plate 102. The motor II 106 controls the rotation of the lead screw II 108. The lead screw II 108 drives the lead screw block II 109 to move. The lead screw block II 109 drives the moving plate 102 to move. The moving plate 102 drives the electric push rod I 105 and the lifting plate I 101 to move. The lifting plate I 101 drives the platform bottom plate 501 to complete one-time blank assembling, one-time welding, second-time blank assembling, and second-time welding in sequence from the back to the front. The height of the lifting plate I 101 is adjusted by the electric push rod I 105 to make the height of the lifting plate I 101 suitable for the transportation and blank assembling of the platform bottom plate 501.

[0067] An opening on the lifting plate I 101 is provided with a flipping and positioning mechanism 103. The flipping and positioning mechanism 103 includes a positioning block 1030, a Y-shaped chute 1031, a limiting shaft II 1032, a connecting plate I 1033, a connecting rod I 1034, a connecting rod II 1035, a connecting shaft I 1036, a connecting shaft II 1037, a motor III 1038, and a limiting plate I 1039. The positioning block 1030 is provided with a Y-shaped chute 1031. The motor III 1038 is arranged on one side of the positioning block 1030. The output end of the motor III 1038 is connected to the connecting shaft I 1036. The connecting shaft I 1036 is connected to the connecting rod II 1035. The connecting rod II 1035 is connected to the connecting rod I 1034 through a pin shaft. The connecting rod I 1034 is connected to the connecting plate I 1033. The two groups of connecting rods I 1034 are connected through the connecting shaft II 1037. The connecting shaft II 1037 passes through the connecting plate I 1033 and is arranged in the Y-shaped chute 1031 on the positioning block 1030. The connecting plate I 1033 is provided with a limiting shaft II 1032. The limiting shaft II 1032 and the connecting shaft II 1037 are arranged in the Y-shaped chute 1031 on the positioning block 1030 and cooperate with the Y-shaped chute 1031. The connecting plate I 1033 is further provided with a limiting plate I 1039. The positioning block 1030 is fixed to the lower part of the lifting plate I 101. The motor III 1038 drives the connecting shaft I 1036 to rotate. The connecting shaft I 1036 drives the connecting rod II 1035 to rotate. The connecting rod II 1035 drives the connecting rod I 1034. The connecting rod I 1034 drives the connecting shaft II 1037 to move upward in the Y-shaped chute 1031. The connecting shaft II 1037 drives the connecting plate I 1033 to move upward. The connecting plate I 1033 drives the limiting plate I 1039 to move upward. When the limiting shaft II 1032 arranged on the connecting plate I 1033 reaches the top of the Y-shaped chute 1031, the connecting rod I 1034 drives the connecting shaft II 1037 to slide to the top of the arc-shaped bifurcation in the Y-shaped chute 1031 through rotation. The connecting shaft II 1037 drives the connecting plate I 1033 to rotate. The connecting plate I 1033 drives the limiting plate I 1039 to rotate. The limiting plate I 1039 is perpendicular to the lifting plate I 101. The limiting plate I 1039 completes the action of first rising and then flipping, slightly lifting the platform bottom plate 501 on the lifting plate I 101 first, and then pushing the platform bottom plate 501 forward through the flipping of the limiting plate I 1039, so that the rear end of the platform bottom plate 501 is close to the limiting plate I 1039, playing a positioning role.

[0068] The limiting plate I 1039 is provided with a downward pressing and positioning mechanism 104. The downward pressing and positioning mechanism 104 includes a motor IV 1041, a transmission shaft I 1042, a connecting shaft III 1043, a connecting rod III 1044, a lower pressing plate 1045, a sliding groove 1046, a limiting shaft III 1047, and a motor mounting plate II 1048. The motor mounting plate II 1048 is arranged at the lower part of the limiting plate I 1039. The motor IV 1041 is mounted on the motor mounting plate II 1048. The output end of the motor IV 1041 is connected to the transmission shaft I 1042. The transmission shaft I 1042 is connected to the connecting rod III 1044. The connecting rod III 1044 is connected to the lower pressing plate 1045. The lower pressing plate 1045 is provided with a sliding groove 1046. The two groups of lower pressing plates 1045 are connected by a connecting shaft III 1043. The lower pressing plate 1045 is arranged at the opening on the limiting plate I 1039. The limiting shaft III 1047 is fixed in the opening on the limiting plate I 1039. At the same time, the limiting shaft III 1047 is arranged in the sliding groove 1046 provided on the lower pressing plate 1045. The motor IV 1041 drives the transmission shaft I 1042 to rotate. The transmission shaft I 1042 drives the connecting rod III 1044 to rotate. The connecting rod III 1044 drives the lower pressing plate 1045. The lower pressing plate 1045 is limited by the limiting shaft III 1047. The connecting rod III 1044 drives the lower pressing plate 1045 to move obliquely along the direction of the sliding groove 1046 during rotation. The lower pressing plate 1045 presses down and fixes the platform bottom plate 501 on the lifting plate I 101 to limit the platform bottom plate and ensure the positioning of blank assembling and welding.

[0069] The side plate positioning mechanism 14 includes a motor V 201, a positioning plate I 202, a bidirectional lead screw 203, an electric push rod II 204, a limit plate II 205, a motor VI 206, a lifting plate II 207, a transmission shaft II 211, a support plate I 212, a helical gear I 213, a motor VII 214, and a transmission shaft III 215. The motor V 201 is arranged on one side of the limit plate II 205. The output end of the motor V 201 is connected to the bidirectional lead screw 203. The positioning plate I 202 is arranged on the bidirectional lead screw 203. The electric push rod II 204 is arranged on the positioning plate I 202. The lower part of the electric push rod II 204 is provided with the lifting plate II 207. The motor VI 206 is arranged on the lifting plate II 207. The motor VI 206 controls the rotation of the transmission shaft II 211. The transmission shaft II 211 is arranged in the support plate I 212 and is rotatably connected to the support plate I 212. Helical gears I 213 are arranged at both ends of the transmission shaft II 211. The motor VII 214 is arranged at the lower part of the lifting plate II 207. The motor VII 214 controls the rotation of the transmission shaft III 215. The motor V 201 controls the rotation of the bidirectional lead screw 203, drives the positioning plate I 202 arranged on the bidirectional lead screw 203 to move, the positioning plate I 202 drives the electric push rod II 204 to move, the electric push rod II 204 controls the lifting of the lifting plate II 207, groups the platform side plate and the platform bottom plate by moving, adjusts the grouping height of the platform side plate by lifting. The motor VI 206 drives the helical gear I 213 to rotate through the transmission shaft II 211, providing power for the side alignment mechanism 209. The motor VII 214 provides power for the side plate clamping mechanism 210 through the transmission shaft III 215.

[0070] A mobile welding mechanism 208 is arranged on the upper part of the lifting plate II 207. The mobile welding mechanism 208 includes a motor VIII 2081, a transmission shaft IV 2082, a rotating frame 2083, a motor IX 2084, a lead screw III 2085, a nut block III 2086, and a welding robot II 2087. The output end of the motor VIII 2081 is connected to the transmission shaft IV 2082. The rotating frame 2083 is arranged on the transmission shaft IV 2082. The lead screw III 2085 is arranged at the lower part of the rotating frame 2083. The nut block III 2086 is arranged on the lead screw III 2085. The motor IX 2084 is installed on one side of the rotating frame 2083. The output end of the motor IX 2084 is connected to the lead screw III 2085. The welding robot II 2087 is arranged at the lower part of the nut block III 2086. The motor VIII 2081 controls the rotation of the transmission shaft IV 2082. The transmission shaft IV 2082 drives the rotating frame 2083 to rotate. The rotating frame 2083 drives the nut block III 2086 to rotate. The nut block III 2086 drives the welding robot II 2087 to rotate. The motor IX 2084 controls the rotation of the lead screw III 2085. The lead screw III 2085 drives the nut block III 2086 to move. The nut block III 2086 drives the welding robot II 2087 to move. The welding robot II 2087 performs primary welding on the platform bottom plate and the platform side plate.

[0071] On both sides of the lifting plate II 207, there are side centering mechanisms 209. The side centering mechanism 209 includes a bevel gear II 2091, a connecting shaft IV 2092, a support plate II 2093, a connecting rod IV 2094, a positioning plate II 2095, an electric push rod III 2096, a connecting plate II 2097, a spring I 2098, and a positioning plate III 2099. The bevel gear II 2091 is arranged on the connecting shaft IV 2092. The connecting shaft IV 2092 is arranged on the support plate II 2093 and is rotatably connected to the support plate II 2093. The support plate II 2093 is fixed on the lifting plate II 207. The connecting shaft IV 2092 is provided with a connecting rod IV 2094. A positioning plate II 2095 is arranged between two groups of connecting rods IV 2094. The lower part of the connecting rod IV 2094 is provided with a connecting plate II 2097. The connecting plate II 2097 is connected to the positioning plate III 2099. The electric push rod III 2096 is arranged below the positioning plate II 2095. The ejecting end of the electric push rod III 2096 is arranged above the connecting plate II 2097. A spring I 2098 is arranged between the connecting plate II 2097 and the positioning plate III 2099. The motor VI 206 controls the rotation of the transmission shaft II 211. The transmission shaft II 211 drives the bevel gear I 213 to rotate. The bevel gear I 213 meshes with the bevel gear II 2091. The bevel gear II 2091 drives the connecting shaft IV 2092 to rotate. The connecting shaft IV 2092 drives the connecting rod IV 2094. The connecting rod IV 2094 drives the connecting plate II 2097. The connecting plate II 2097 drives the positioning plate III 2099. The electric push rod III 2096 controls the rotation of the connecting plate II 2097. The connecting plate II 2097 drives the positioning plate III 2099 to rotate. The spring I 2098 controls the rotation range of the positioning plate III 2099. Through the clamping of the positioning plates III 2099 on both sides, it is ensured that the opening on the platform side plate 502 clamped is matched with the boss arranged on the platform bottom plate 501 for one-time blank assembly.

[0072] A side plate clamping mechanism 210 is provided at the lower part of the lifting plate II 207. The side plate clamping mechanism 210 includes a gear I 2101, a positioning plate IV 2102, a connecting rod V 2103, a connecting rod VI 2104, a connecting rod VII 2105, a limit shaft IV 2106, a spring II 2107, and a positioning plate V 2108. The gear I 2101 is arranged on the positioning plate IV 2102, the positioning plate IV 2102 is arranged at the lower part of the lifting plate II 207, the gear I 2101 is connected to the connecting rod V 2103, the connecting rod V 2103 is connected to the connecting rod VII 2105, a connecting rod VI 2104 is further provided between the connecting rod VII 2105 and the positioning plate IV 2102, a limit shaft IV 2106 is provided at the lower part of the connecting rod VII 2105, a positioning plate V 2108 is provided at the top of the limit shaft IV 2106, a spring II 2107 is provided between the positioning plate V 2108 and the connecting rod VII 2105, and the spring II 2107 is sleeved on the limit shaft IV 2106. The motor VII 214 controls the rotation of the transmission shaft III 215, the transmission shaft III 215 controls the rotation of the gear I 2101, the gears I 2101 mesh with each other, the gear I 2101 drives the connecting rod V 2103, the connecting rod V 2103 drives the connecting rod VII 2105, the connecting rod VII 2105 drives the limit shaft IV 2106, the limit shaft IV 2106 drives the positioning plate V 2108, the two groups of positioning plates V 2108 clamp, and the positioning plate V 2108 clamps the platform side plate 502 and drives the platform side plate 502 to perform a primary blank assembly.

[0073] The fixing mechanism 21 includes an electric push rod IV 301, a connecting slider II 302, a connecting plate III 303, a connecting shaft V 304, a connecting slider III 305, a limit chute 306, a limit plate III 307, a limit plate IV 308, a rack I 309, a connecting plate IV 310, a gear II 311, and a rack II 312; the electric push rod IV 301 is arranged on the lower platform plate 20, the top end of the electric push rod IV 301 is provided with the connecting slider II 302, the connecting slider II 302 is provided with the connecting plate III 303 which is rotatably connected to the connecting plate III 303, the connecting plate III 303 is connected to the connecting slider III 305 through the connecting shaft V 304, the connecting slider III 305 is arranged in the limit chute 306, the limit chute 306 is fixed on the lower platform plate 20, the connecting slider III 305 is provided with the limit plate III 307, the front end of the connecting slider II 302 is provided with the rack II 312, the rack II 312 meshes with the gear II 311, the gear II 311 is arranged in the connecting plate IV 310, the connecting plate IV 310 is fixed to the lower part of the upper platform plate 19, the gear II 311 meshes with the rack I 309, and the rack I 309 is connected to the limit plate IV 308; the electric push rod IV 301 pushes the connecting slider II 302, the connecting slider II 302 drives the two side connecting plates III 303, the connecting plates III 303 drive the connecting slider III 305, the connecting slider III 305 drives the limit plate III 307, the two side limit plates III 307 move centrically, the connecting slider II 302 simultaneously pushes the rack II 312 forward, the rack II 312 meshes with the gear II 311, the gear II 311 meshes with the rack I 309, and the rack I 309 drives the limit plate IV 308 to move backward. Through the centric movement of the two side limit plates III 307 and the backward movement of the limit plate IV 308, the platform bottom plate and the platform side plate are clamped and positioned from three sides, reducing the deformation amount during welding.

[0074] The rib positioning mechanism 18 includes a connecting seat 401, a positioning plate VI 402, a motor X 403, a gear III 404, a gear IV 405, a positioning plate VII 406, an electric push rod V 407, a lifting plate III 408, a motor XI 409, a lead screw IV 410, a connecting column 411, and a lifting plate IV 412. A positioning plate VI 402 is provided at the lower part of the connecting seat 401. The motor X 403 is arranged on the positioning plate VI 402. The output end of the motor X 403 is connected to the gear IV 405. The gear IV 405 meshes with the gear III 404. A positioning plate VII 406 is provided below the gear III 404. An electric push rod V 407 is provided on the positioning plate VII 406. A lifting plate III 408 is provided below the electric push rod V 407. A motor XI 409 is provided on the lifting plate III 408. The output end of the motor XI 409 is connected to the lead screw IV 410. A connecting column 411 is fixed below the lifting plate III 408. The lifting plate IV 412 is matched with the lead screw IV 410 and is slidably connected to the connecting column 411. The motor X 403 controls the rotation of the gear IV 405. The gear IV 405 meshes with the gear III 404. The gear III 404 drives the positioning plate VII 406 to rotate. The positioning plate VII 406 drives the lower mechanism to rotate. The electric push rod V 407 drives the lifting plate III 408 to lift and lower. The motor XI 409 drives the lead screw IV 410 to rotate. The lead screw IV 410 drives the lifting plate IV 412 to lift and lower. The lifting plate IV 412 drives the rib clamping mechanism 413 and the fine adjustment mechanism 414 to perform a clamping action.

[0075] A rib clamping mechanism 413 is provided below the lifting plate IV 412. The rib clamping mechanism 413 includes a positioning plate VIII 4131, a connecting rod VIII 4132, a connecting rod IX 4133, a connecting rod X 4134, and a positioning plate IX 4135. The positioning plate VIII 4131 is fixed to the lower part of the connecting column 411. The connecting rod VIII 4132 is arranged on both sides of the lifting plate IV 412. A connecting rod IX 4133 and a connecting rod X 4134 are provided below the positioning plate VIII 4131. The connecting rod VIII 4132, the connecting rod IX 4133, and the connecting rod X 4134 are simultaneously connected to the positioning plate IX 4135. The motor XI 409 drives the lead screw IV 410 to rotate. The lead screw IV 410 drives the lifting plate IV 412 to descend. The lifting plate IV 412 drives the connecting rod VIII 4132. The connecting rod VIII 4132 drives the positioning plate IX 4135 and the fine adjustment mechanism 414 to be centered and clamped, taking out the platform rib 503 from the workpiece rack 22, and performing secondary blank assembling after moving and positioning.

[0076] A fine-tuning mechanism 414 is provided at the lower part of the lifting plate IV 412. The fine-tuning mechanism 414 includes a support plate III 4140, a motor XII 4141, a motor mounting plate III 4142, a gear V 4143, a rack V 4144, a rack VI 4145, a connecting plate V 4146, a positioning plate X 4147, a motor XIII 4148, and a limiting rod 4149. The support plate III 4140 is arranged between the connecting plates V 4146. The motor mounting plate III 4142 is arranged on the support plate III 4140. The motor XII 4141 is mounted on the motor mounting plate III 4142. The output end of the motor XII 4141 is connected to the gear V 4143. The gear V 4143 meshes with the rack V 4144 and the rack VI 4145. The tops of the rack V 4144 and the rack VI 4145 are provided with a motor XIII 4148. The output end of the motor XIII 4148 controls the rotation of the limiting rod 4149. The positioning plate X 4147 is arranged between two adjacent groups of connecting plates V 4146. The motor XII 4141 controls the rotation of the gear V 4143. The gear V 4143 meshes with the rack V 4144 and the rack VI 4145. The rack V 4144 and the rack VI 4145 drive the limiting rods 4149 at both ends to move. The motor XIII 4148 controls the rotation of the limiting rod 4149. The position of the positioning rod is adjusted through the racks on both sides. Then, by controlling the lifting and lowering of the positioning rods on both sides, the distance between the two sides of the platform rib plate after clamping is adjusted according to the welding position, and the secondary blanking of the platform rib plate is carried out. After the secondary blanking is completed, the overall support platform is secondarily welded by the welding robot I 16. After the welding is completed, the welded finished product is transferred by hoisting.

[0077] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0078] In summary, including but not limited to electronic or electrical components such as motors, electric push rods, and welding robots are components in the prior art, obtained through private customization or purchase. The electrical connections between the components are all conventional circuit connections or electrical connections in the prior art, which are not within the protection scope of the present invention.

[0079] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the structure of the invention or exceed the scope defined by the claims of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An automated welding device and welding method for a cross support platform, characterized in that The specific welding methods are as follows: S1. Material preparation for the support platform: The support platform includes the platform bottom plate, platform side plate and platform rib plate. The thickness of the platform bottom plate is 12mm, the thickness of the platform side plate is 10mm, and the thickness of the platform rib plate is 8mm. The material is Q235B steel plate, which is cut by laser. After cutting, the burrs and flash are polished, and the surface of the steel plate is cleaned. The straightness deviation of the cut is ≤1‰, ensuring that the cut is smooth and flat and meets the welding standards; S2. Welding method and parameter setting: The welding method is gas shielded welding, and the welding wire that matches the base material is selected. The specific model is ER50-6, the welding wire diameter is 1.2-1.6mm, and Ar+CO2 is used as the shielding gas; S3, primary assembly: the conveying platform conveys the platform bottom plate to the mobile positioning platform, the mobile positioning platform positions the platform bottom plate, the side plate positioning mechanism clamps the platform side plate, and adjusts the position of the platform side plate to ensure that the opening on the platform side plate is connected with the boss set on the platform bottom plate, and the platform side plate and the platform bottom plate are assembled; S4. Primary welding: Use the welding robot II in the mobile welding mechanism to perform intermittent welding on the overlap between the platform side plate and the platform bottom plate. Set the welding current to 120-200A, welding voltage to 22-26V, gas flow to 12-15L / min, weld length to 10-20mm, weld spacing to 200-300mm, weld leg size ≥6mm, and fix the platform bottom plate and side plate through intermittent welding to reduce heat input and control deformation. S5, secondary assembly: by moving the positioning platform, the semi-finished product after the platform side plate and the platform bottom plate are welded and fixed is further transported forward, the fixing mechanism clamps the platform side plate and the platform bottom plate to reduce the deformation, the rib plate positioning mechanism clamps the platform rib plate, and adjusts the position of the platform rib plate, and assembles the platform rib plate and the platform bottom plate; S6. Secondary welding: Full welding is performed on the platform ribs and the overlap between the platform bottom plate and the platform side plate by welding robot I. The welding current is 200-300A, the welding voltage is 26-32V, the gas flow is 15-20L / min, and the welding speed is 200-500mm / min. When welding, the welding gun of welding robot I is tilted backward, and the welding gun maintains an angle of 10°-15° with the welding workpiece. S7. Post-weld processing: reset the mobile positioning platform, side plate positioning mechanism, and rib plate positioning mechanism; remove welding slag and spatter from the support platform surface, grind weld nodules, check weld appearance quality, and ensure there are no defects such as leaks and pores; S8. After welding, the finished product is transferred by hoisting.

2. The automatic welding equipment and welding method of a cross support platform according to claim 1, characterized in that The welding equipment required for welding in steps S3, S4, S5, and S6 includes a conveying platform, a mobile positioning platform, a positioning frame, a side plate positioning mechanism, a conveying mechanism, a welding robot I, a rotating mechanical arm, a rib plate positioning mechanism, an upper platform plate, a lower platform plate, a fixing mechanism, and a workpiece rack; the conveying platform is arranged at the rear end of the entire device, a mobile positioning platform is arranged at the front end of the conveying platform, the mobile positioning platform is arranged between the upper platform plate and the lower platform plate, the positioning frame is arranged on both sides of the mobile positioning platform, the side plate positioning mechanism is arranged between the positioning frames, the conveying mechanism is arranged on the positioning frame, the welding robot I and the rotating mechanical arm are respectively arranged on the corresponding conveying mechanisms, the lower part of the rotating mechanical arm is provided with a rib plate positioning mechanism, the fixing mechanism is arranged at the front end of the mobile positioning platform, and the workpiece rack is arranged on both sides of the positioning frame; the conveying mechanism includes a motor I, a wire block I, and a lead screw I; the motor I is arranged at the front end of the positioning frame, the output end of the motor I is connected to the lead screw I, the wire block I cooperates with the lead screw I, and the left and right groups of wire blocks I are respectively connected to the welding robot I and the rotating mechanical arm; The cross support platform is welded together by the platform bottom plate, platform side plate and platform rib plate.

3. The automatic welding equipment and welding method of a cross support platform according to claim 2, characterized in that The mobile positioning platform comprises a lifting plate I, a mobile plate, an electric push rod I, a motor II, a motor mounting plate I, a screw II, a screw block II, a limit shaft I, and a connecting slider I; an opening is provided on the lifting plate I, an electric push rod I is provided at the lower part of the lifting plate I, a mobile plate is provided at the lower part of the electric push rod I, the motor mounting plate I is arranged at the lower part of the upper platform plate, the motor II is arranged at the upper part of the motor mounting plate I, the output end of the motor II is connected to the screw II, a screw block II is provided on the screw II, the screw block II is fixedly connected to the mobile plate, limit shafts I are provided on both sides of the screw II, a connecting slider I is provided on the limit shaft I, and the connecting slider I is fixedly connected to the mobile plate.

4. The automatic welding equipment and welding method of a cross support platform according to claim 3, characterized in that A flip positioning mechanism is provided in the opening on the lifting plate I, and the flip positioning mechanism includes a positioning block, a Y-shaped slide groove, a limit shaft II, a connecting plate I, a connecting rod I, a connecting rod II, a connecting shaft I, a connecting shaft II, a motor III, and a limit plate I; a Y-shaped slide groove is provided on the positioning block, and the motor III is arranged on one side of the positioning block, the output end of the motor III is connected to the connecting shaft I, the connecting shaft I is connected to the connecting rod II, the connecting rod II is connected to the connecting rod I through a pin shaft, the connecting rod I is connected to the connecting plate I, the two groups of connecting rods I are connected through the connecting shaft II, and the connecting shaft II passes through the connecting plate I at the same time and is arranged in the Y-shaped slide groove on the positioning block, a limit shaft II is provided on the connecting plate I, and the limit shaft II and the connecting shaft II are arranged in the Y-shaped slide groove on the positioning block and cooperate with the Y-shaped slide groove, a limit plate I is also provided on the connecting plate I, and the positioning block is fixed at the lower part of the lifting plate I.

5. The automatic welding equipment and welding method of a cross support platform according to claim 4, characterized in that The limit plate I is provided with a downward pressure positioning mechanism, and the downward pressure positioning mechanism includes a motor IV, a transmission shaft I, a connecting shaft III, a connecting rod III, a lower pressure plate, a slide groove, a limit shaft III, and a motor mounting plate II; the motor mounting plate II is arranged at the lower part of the limit plate I, the motor IV is installed on the motor mounting plate II, the output end of the motor IV is connected to the transmission shaft I, the transmission shaft I is connected to the connecting rod III, the connecting rod III is connected to the lower pressure plate, and a slide groove is arranged on the lower pressure plate. The two groups of lower pressure plates are connected by a connecting shaft III, the lower pressure plate is arranged at the opening on the limit plate I, the limit shaft III is fixed in the opening on the limit plate I, and the limit shaft III is arranged in the slide groove arranged on the lower pressure plate.

6. The automatic welding equipment and welding method of a cross support platform according to claim 2, characterized in that The side plate positioning mechanism comprises a motor V, a positioning plate I, a bidirectional lead screw, an electric push rod II, a limit plate II, a motor VI, a lifting plate II, a transmission shaft II, a support plate I, a bevel gear I, a motor VII, and a transmission shaft III; the motor V is arranged on one side of the limit plate II, the output end of the motor V is connected to the bidirectional lead screw, the positioning plate I is arranged on the bidirectional lead screw, the electric push rod II is arranged on the positioning plate I, the lower part of the electric push rod II is provided with a lifting plate II, the lifting plate II is provided with a motor VI, the motor VI controls the rotation of the transmission shaft II, the transmission shaft II is arranged in the support plate I and is rotatably connected to the support plate I, the two ends of the transmission shaft II are provided with bevel gears I, the motor VII is arranged at the lower part of the lifting plate II, and the motor VII controls the rotation of the transmission shaft III.

7. The automatic welding equipment and welding method of a cross support platform according to claim 6, characterized in that A mobile welding mechanism is provided on the upper part of the lifting plate II, and the mobile welding mechanism includes a motor VIII, a transmission shaft IV, a rotating frame, a motor IX, a screw III, a wire block III, and a welding robot II; the output end of the motor VIII is connected to the transmission shaft IV, a rotating frame is provided on the transmission shaft IV, a screw III is provided at the lower part of the rotating frame, the wire block III is arranged on the screw III, the motor IX is installed on one side of the rotating frame, the output end of the motor IX is connected to the screw III, and a welding robot II is provided at the lower part of the wire block III.

8. The automatic welding equipment and welding method of a cross support platform according to claim 6, characterized in that Side centering mechanisms are provided on both sides of the lifting plate II, and the side centering mechanisms include bevel gear II, connecting shaft IV, support plate II, connecting rod IV, positioning plate II, electric push rod III, connecting plate II, spring I, and positioning plate III; bevel gear II is arranged on connecting shaft IV, connecting shaft IV is arranged on support plate II and rotatably connected with support plate II, support plate II is fixed on lifting plate II, connecting rod IV is provided on connecting shaft IV, positioning plate II is provided between two groups of connecting rod IV, connecting plate II is provided at the lower part of connecting rod IV, connecting plate II is connected to positioning plate III, electric push rod III is arranged at the lower part of positioning plate II, the ejection end of electric push rod III is arranged at the upper part of connecting plate II, and spring I is provided between connecting plate II and positioning plate III.

9. The automatic welding equipment and welding method of a cross support platform according to claim 6, characterized in that A side plate clamping mechanism is provided at the lower part of the lifting plate II, and the side plate clamping mechanism includes gear I, positioning plate IV, connecting rod V, connecting rod VI, connecting rod VII, limiting shaft IV, spring II, and positioning plate V; gear I is arranged on positioning plate IV, positioning plate IV is arranged at the lower part of lifting plate II, gear I is connected to connecting rod V, connecting rod V is connected to connecting rod VII, connecting rod VI is also provided between connecting rod VII and positioning plate IV, limiting shaft IV is provided at the lower part of connecting rod VII, positioning plate V is provided at the top end of limiting shaft IV, spring II is provided between positioning plate V and connecting rod VII, and spring II is sleeved on limiting shaft IV.

10. The automatic welding equipment and welding method of a cross support platform according to claim 2, characterized in that The fixing mechanism includes an electric push rod IV, a connecting slider II, a connecting plate III, a connecting shaft V, a connecting slider III, a limiting slide groove, a limiting plate III, a limiting plate IV, a rack I, a connecting plate IV, a gear II, and a rack II; the electric push rod IV is arranged on the lower platform plate, the ejection end of the electric push rod IV is provided with a connecting slider II, the connecting slider II is provided with a connecting plate III and is rotatably connected to the connecting plate III, the connecting plate III is connected to the connecting slider III through the connecting shaft V, the connecting slider III is arranged in the limiting slide groove, the limiting slide groove is fixed on the lower platform plate, the connecting slider III is provided with a limiting plate III, the front end of the connecting slider II is provided with a rack II, the rack II meshes with the gear II, the gear II is arranged in the connecting plate IV, the connecting plate IV is fixed to the lower part of the upper platform plate, the gear II meshes with the rack I, and the rack I is connected to the limiting plate IV; The rib plate positioning mechanism comprises a connecting seat, a positioning plate VI, a motor X, a gear III, a gear IV, a positioning plate VII, an electric push rod V, a lifting plate III, a motor XI, a lead screw IV, a connecting column, and a lifting plate IV; a positioning plate VI is provided at the lower part of the connecting seat, the motor X is arranged on the positioning plate VI, the output end of the motor X is connected to the gear IV, the gear IV meshes with the gear III, a positioning plate VII is provided at the lower part of the gear III, an electric push rod V is provided on the positioning plate VII, a lifting plate III is provided at the lower part of the electric push rod V, a motor XI is provided on the lifting plate III, the output end of the motor XI is connected to the lead screw IV, a connecting column is fixed at the lower part of the lifting plate III, the lifting plate IV cooperates with the lead screw IV and is slidably connected with the connecting column; The lower part of the lifting plate IV is provided with a rib plate clamping mechanism, and the rib plate clamping mechanism includes a positioning plate VIII, a connecting rod VIII, a connecting rod IX, a connecting rod X, and a positioning plate IX; the positioning plate VIII is fixed to the lower part of the connecting column, the connecting rod VIII is arranged on both sides of the lifting plate IV, the lower part of the positioning plate VIII is provided with a connecting rod IX and a connecting rod X, and the connecting rods VIII, IX, and X are connected to the positioning plate IX at the same time; A fine-tuning mechanism is provided at the lower part of the lifting plate IV, and the fine-tuning mechanism includes a support plate III, a motor XII, a motor mounting plate III, a gear V, a rack V, a rack VI, a connecting plate V, a positioning plate X, a motor XIII, and a limit rod; the support plate III is arranged between the connecting plates V, the motor mounting plate III is arranged on the support plate III, the motor XII is installed on the motor mounting plate III, the output end of the motor XII is connected to the gear V, the gear V meshes with the rack V and the rack VI, the motor XIII is provided at the top of the rack V and the rack VI, the output end of the motor XIII controls the rotation of the limit rod, and the positioning plate X is arranged between two adjacent groups of connecting plates V.

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