Welding device and welding method for steel structure frame

Abstract

The invention discloses a welding device and method for a steel structure frame, and relates to the technical field of steel structure frame welding. The device comprises a bottom plate, two movable welding assemblies are arranged on the bottom plate, two control seats are arranged on the bottom plate, the two control seats are arranged between the two movable welding assemblies, two movable seats are arranged on the two control seats, two rotating plates and two bearing plates are arranged on the opposite faces of the two movable seats, the bearing plates are arranged on the lower sides of the rotating plates, and the rotating plates are arranged on the lower sides of the bearing plates. The control base and the movable base are both hollow, a screw rod is rotationally connected to the bottom wall of the control base, a control mechanism is arranged on the screw rod, the outer surface of the screw rod is sleeved with a threaded sleeve in a threaded mode, and an L-shaped rod is fixedly connected to the outer surface of the threaded sleeve. And the steel structure frame is turned over automatically, the welding time of the steel structure frame is not affected too much, and the welding efficiency and speed of the steel structure frame are further guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure frame welding, and in particular to a welding device and a welding method for a steel structure frame. Background Art

[0002] The steel structure frame is a structure made of steel materials and is one of the main types of building structures. Its structure is mainly composed of steel beams, steel columns, steel trusses and other components made of steel sections and steel plates.

[0003] After the existing steel structure frame is assembled, the connection points of the steel structure frame need to be welded and fixed by welding equipment. Most of the existing steel structure welding methods generally place the assembled steel structure frame on a welding table first, and then weld the exposed connection points of the steel structure frame by welding equipment. However, since the steel structure frame is placed on the welding table, its ground connection points cannot be welded. Therefore, after welding one side of the steel structure frame, it is necessary to manually turn the steel structure frame over through other auxiliary equipment. This increases the time for welding the steel structure frame and affects the efficiency and speed of welding the steel structure frame. In response to the above problems, the inventor has designed a welding device and a welding method for a steel structure frame. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a welding device and a welding method for a steel structure frame, which can automatically turn over the steel structure frame after a multi-axis welding robot has completed welding one side of the steel structure frame, without affecting the welding time of the steel structure frame too much, thereby further ensuring the efficiency and speed of the steel structure frame welding.

[0005] In a first aspect, the present invention provides a welding device for a steel structure frame, comprising a base plate, two movable welding assemblies are arranged on the base plate, two control seats are arranged on the base plate, the control seat is arranged between the two movable welding assemblies, each control seat is provided with a movable seat, a rotating plate and a bearing plate are arranged on opposite surfaces of the movable seat, the bearing plate is located below the rotating plate, the two rotating plates clamp and fix the steel structure frame to be welded, and the bearing plate supports the steel structure frame to be welded; The control seat and the movable seat are both hollow structures. A screw is rotatably connected in the control seat. A control mechanism is arranged on the screw. A threaded sleeve is arranged on the threaded sleeve. An L-shaped rod is fixedly connected to the outer surface of the threaded sleeve. A connecting slide groove connected to the interior of the two control seats is provided on the opposite side walls of the two control seats. The L-shaped rod passes through the connecting slide groove and extends to the outside of the control seat. The upper end of the vertical rod of the L-shaped rod is fixedly connected to the bearing plate. The upper end of the screw rod is connected with a driving shaft, which penetrates into the movable seat and is rotatably connected with the movable seat. A sliding hole is opened on the control seat, and the driving shaft slides in the sliding hole. The upper end of the driving shaft is fixedly connected with a first bevel gear. A rotating shaft is rotatably connected to the inner wall of the movable seat, and a second bevel gear is fixed on the rotating shaft. The second bevel gear is meshed and connected with the first bevel gear. A connecting shaft is provided at one end of the rotating shaft. The connecting shaft passes through the movable seat and is rotatably connected to the side wall of the movable seat. The exposed end of the connecting shaft is fixedly connected to the rotating plate, and a lifting structure is provided on the connecting shaft.

[0006] Furthermore, the mobile welding assembly includes a base, on which a multi-axis welding robot is provided, and the mobile welding assembly also includes a guide rail, which is arranged in a horizontal direction and fixedly mounted on a base plate, a guide rail joint which is slidably connected to the guide rail is provided on the lower side of the base, a threaded rod is provided on a threaded sleeve on the base, and both ends of the threaded rod are respectively rotatably connected to mounting seats, and the mounting seats are fixedly mounted on the base plate, and a servo motor is fixedly mounted on the upper surface of the base plate, and one end of the servo motor output shaft rotates through the mounting seat and is fixedly connected to one end of the threaded rod.

[0007] Furthermore, the two control seats are arranged vertically in parallel, one of which is fixedly mounted on the base plate, and the other is connected to a telescopic cylinder, one end of which is fixed on the base plate, and the control seat connected to the telescopic cylinder is slidably connected to the base plate.

[0008] Furthermore, the lifting structure includes a driving cam, which is fixedly mounted on a connecting shaft located inside the movable seat. The driving cam is gourd-shaped, and a first contact head is provided below the driving cam. The first contact head contacts the outer edge of the driving cam. The lower end of the first contact head is fixedly connected to a support rod, and the lower end of the support rod slides through the lower surface of the movable seat and is fixedly connected to the control seat. A first spring is mounted on the support rod between the first contact head and the bottom wall of the movable seat.

[0009] Furthermore, a cross shaft is fixedly connected to the upper end of the screw, a cross groove is opened at the lower end of the drive shaft, the cross shaft is inserted into the cross groove and slidably connected to the cross groove; and / or, a support frame is fixed in the movable seat, a bearing is fixed to the upper end of the support frame, the drive shaft is installed in the bearing, and the lower end face of the first bevel gear supports the upper end of the support frame.

[0010] Furthermore, a driving structure is provided between the connecting shaft and the rotating shaft, and the driving structure includes a fixed plate, the fixed plate is provided between the rotating shaft and the connecting shaft, a fixed rod is fixedly connected to the outer surface of the fixed plate, and the upper end of the fixed rod is fixedly connected to the top wall of the movable seat; a gear groove is provided on the end surface of the connecting shaft facing the fixed plate, and a shaft body is fixedly connected to the end surface of the rotating shaft facing the fixed plate, the free end of the shaft body rotates through the fixed plate and extends into the gear groove, the shaft body is located at the center of the gear groove, and a first gear is fixedly connected to one end of the shaft body located in the gear groove, and more than two second gears are rotatably connected to the end surface of the fixed plate facing the gear groove, the second gears are meshingly connected to the outer surface of the first gear, a plurality of teeth are provided on the annular inner wall of the gear groove, and the second gears are meshingly connected to the teeth in the gear groove.

[0011] Furthermore, the control mechanism includes a third gear and a rack, the third gear is fixedly sleeved on the screw, the third gear is meshingly connected to the rack, the rack is slidably connected to the bottom wall of the control seat, and a limiting structure is provided in the control seat; a push rod is fixedly connected to the side of the rack, the outer end of the push rod slides through the side wall of the control seat, and a second contact head is fixedly connected to the end, and a second spring is mounted on the push rod between the second contact head and the outer surface of the control seat; an external plate extends from the control seat near the bottom of the second contact head, and the external plate is rotatably connected to a lever through a rotating shaft, and one end of the lever is in contact with the second contact head; a trigger plate is connected to the surface of the side of the base facing the lever, and the trigger plate is in contact with the other end of the lever away from the second contact head.

[0012] Furthermore, the lever arm in contact with the second contact head is greater than the lever arm in contact with the trigger plate.

[0013] Furthermore, the limiting structure includes a clamping rod, which is arranged in the control seat and is located on the side of the rack away from the push rod. One end of the clamping rod slides through the side wall of the control seat. A push plate is fixedly connected to the end of the clamping rod located outside the control seat. A tension spring is fixedly connected between the push plate and the control seat. The tension spring is movably sleeved on the outer surface of the clamping rod. The other side of the push plate contacts the trigger plate. The rack is inclined at a corner close to the clamping rod. A clamping groove is opened on the surface of the side of the rack facing away from the third gear, and the clamping groove coincides with the end of the clamping rod located in the control seat.

[0014] In a second aspect, the present invention provides a welding method for a steel structure frame, using the above-mentioned welding device, and the steps are as follows: S1. Place the spliced ​​steel structure frame on the load-bearing plate, and at the same time, the telescopic cylinder pushes the movable control seat to move toward the other side control seat, so that the two rotating plates clamp the spliced ​​steel structure frame; S2, the servo motor starts, the output shaft of the servo motor synchronously drives the threaded rod to rotate, the base is displaced under the transmission of the threaded rod, and at the same time, the base drives the multi-axis welding robot to move out of the reset position and enter the welding position, and the multi-axis welding robot performs preliminary welding on the splicing points of the steel structure frame; S3. When the multi-axis welding robot has finished welding the two welding points on the front of the steel structure frame, the trigger plates of the two multi-axis welding robots are simultaneously in contact with the ends of the levers on the outsides of the two control seats away from the second contact head, driving the levers to rotate clockwise with the rotating shaft as the rotation point, so that the other end of the lever forms a thrust on the second contact head, and the push rod pushes the rack to move into the control seat, the rack drives the third gear to rotate, the screw rotates synchronously with the third gear, and the screw drives the drive shaft to rotate synchronously. The rotating shaft rotates under the meshing transmission of the first bevel gear and the second bevel gear, and the connecting shaft rotates synchronously under the drive of the driving structure, so as to control the rotating plate to drive the steel structure frame to flip 180 degrees; S4. During the rotation of the connecting shaft, the arc surface of the driving cam presses the first contact head, so that the movable seat rises as a whole. When the driving cam rotates more than 90 degrees, the driving cam no longer presses the first contact head. At this time, the movable seat moves downward under the push of the first spring; the screw rotates again during the process, and the threaded sleeve moves downward under the transmission of the screw thread, and the L-shaped rod drives the bearing plate to move downward; S5. When the push rod pushes the rack to move a certain distance, the inclined surface of the rack contacts the clamping rod and squeezes the clamping rod, causing the clamping rod to move outward. At the same time, the tension spring is stressed and stretched. When the rack moves the maximum distance, the clamping rod and the clamping groove are at the same horizontal position. Therefore, the clamping rod is pulled into the clamping groove by the tension spring, thereby completing the fixing of the rack. S6. When the steel structure frame is turned over and welded, the multi-axis welding robot moves to the reset station, so that the trigger plate on the base contacts the push plate and causes the push plate to move to the side away from the control seat, so that the push plate pulls the clamping rod and the clamping groove to separate, and the rack loses its restriction and resets under the push of the second spring. At the same time, the rack drives the screw to reverse, so that the steel structure frame after welding is turned over again, and the load-bearing plate is reset at the same time, which is convenient for supporting the steel structure frame next time.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention does not require manual flipping. After the multi-axis welding robot has completed welding one side of the steel structure frame, the steel structure frame can be automatically flipped over, which will not affect the welding time of the steel structure frame too much, and further ensures the efficiency and speed of the steel structure frame welding.

[0016] (2) The present invention simultaneously lifts the structure and lowers the load-bearing plate, thereby avoiding the problem of the steel structure frame contacting the load-bearing plate when turning over, which would cause the steel structure frame to get stuck, and further ensuring the stability of the steel structure frame when turning over.

[0017] (3) The present invention configures the driving structure between the rotating shaft and the connecting shaft as a planetary gear set, so that the connecting shaft rotates 180 degrees only after the rotating shaft rotates a large number of times. Therefore, when the steel structure frame rotates, the load-bearing plate drops a large distance, which can further avoid contact between the steel structure frame and the surface of the load-bearing plate, and further ensure the stability of the load-bearing plate when it is turned over.

[0018] (4) The present invention arranges the rotating shaft on the side of the lever away from the second contact head. According to the lever principle, the lever arm on the side where the lever contacts the trigger plate is shorter. Therefore, when the trigger plate pushes one side of the lever to move a shorter distance, the other side of the lever can push the second contact head to move a longer distance, thereby avoiding as much as possible the situation where the trigger plate moves a shorter distance, resulting in a shorter descending distance of the load-bearing plate.

[0019] (5) The present invention can fix the rack by providing a limiting structure, thereby avoiding as much as possible the problem that the rack is reset under the push of the second spring, causing the screw to reverse and the steel structure frame to flip over again. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a welding device for a steel structure frame provided by the present invention; Figure 2 A side plan view of the internal structure of the control seat and the movable seat provided by the present invention; Figure 3 for Figure 2 Enlarged view of point B in the middle; Figure 4 It is a schematic diagram of the driving structure of the present invention; Figure 5 for Figure 1 Enlarged view of point A in the middle; Figure 6 A top plan view of the internal structure of the control seat of the present invention; Figure 7 It is a schematic diagram of the driving cam structure of the present invention.

[0021] The markings in the figure are: 1. bottom plate; 2. mobile welding assembly; 201. base; 202. multi-axis welding robot; 203. guide rail; 204. servo motor; 205. mounting seat; 206. threaded rod; 207. trigger plate; 3. control seat; 4. movable seat; 5. rotating plate; 6. bearing plate; 7. screw rod; 8. threaded sleeve; 9. L-shaped rod; 10. connecting slide; 11. driving shaft; 12. cross shaft; 13. first bevel gear; 14. rotating shaft; 15. second bevel gear wheel; 16, connecting shaft; 17, driving cam; 18, supporting rod; 19, first contact head; 20, first spring; 21, fixing plate; 22, fixing rod; 23, shaft body; 24, gear groove; 25, first gear; 26, second gear; 27, third gear; 28, rack; 29, push rod; 30, second contact head; 31, second spring; 32, external plate; 33, rotating shaft; 34, lever; 35, clamping groove; 36, clamping rod; 37, pushing plate; 38, tension spring. DETAILED DESCRIPTION

[0022] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0023] like Figures 1 to 7 As shown, a welding device for a steel structure frame provided by the present invention includes a base plate 1, on which two mobile welding assemblies 2 are arranged, the mobile welding assembly 2 includes a base 201, on which a multi-axis welding robot 202 is arranged, the multi-axis welding robot 202 is an existing known technology and is not described in detail here, the mobile welding assembly 2 also includes two guide rails 203, the two guide rails 203 are arranged in a horizontal direction, and are fixedly mounted on the base plate 1, the lower side of the base 201 is provided with a guide rail joint slidably connected to the guide rail 203, a threaded sleeve is provided on the base 201, and two ends of the threaded rod 206 are rotatably connected to two mounting seats 205, the two mounting seats 205 are both fixedly mounted on the base plate 1, and a servo motor 204 is fixedly mounted on the upper surface of the base plate 1, and one end of the output shaft of the servo motor 204 rotates through the mounting seat 205 and is fixedly connected to one end of the threaded rod 206.

[0024] When in use, the servo motor 204 is started, and the output shaft of the servo motor 204 synchronously drives the threaded rod 206 to rotate, so that the base 201 is displaced under the transmission of the thread of the threaded rod 206, so that the base 201 can drive the multi-axis welding robot 202 to slide back and forth on the guide rail 203, so that the multi-axis welding robot 202 can weld different welding points of the steel structure frame, and the moving trajectory of the multi-axis welding robot 202 is divided into different stations, which can be subdivided into a reset station, a welding station and a standby station. At the same time, according to the existing experience of welding the steel structure frame diagonally first, the reset station and the standby station of the two multi-axis welding robots 202 are both set diagonally. In this way, when welding the frame, when the two multi-axis welding robots 202 move to the corresponding welding stations respectively, they can first weld the diagonals of the steel structure frame.

[0025] Specifically, two control seats 3 are provided on the base plate 1, and the two control seats 3 are arranged vertically in parallel. The bottom of one control seat 3 is fixedly installed on the base plate 1, and the bottom of the other control seat 3 is slidably connected on the base plate 1, and a telescopic cylinder is provided on the back side. The telescopic shell of the telescopic cylinder is fixedly installed on the base plate 1, and one end of the telescopic rod of the telescopic cylinder is fixedly installed on the back side of the control seat 3, so that one control seat 3 can be pushed to move by the telescopic cylinder.

[0026] Specifically, two control seats 3 are arranged between two movable welding assemblies 2, two movable seats 4 are arranged on the two control seats 3, two rotating plates 5 and two supporting plates 6 are arranged on the opposite surfaces of the two movable seats 4, and the supporting plates 6 are arranged on the lower side of the rotating plates 5. During use, the spliced ​​steel structure frame is placed on the supporting plates 6, and the movable control seat 3 is displaced to the other side of the control seat 3, so that the two rotating plates 5 can clamp the spliced ​​steel structure frame.

[0027] Specifically, the interior of the control seat 3 and the movable seat 4 are both hollow, and a screw rod 7 is rotatably connected to the bottom wall of the control seat 3, and a control mechanism is arranged on the screw rod 7. A threaded sleeve 8 is threadedly sleeved on the outer surface of the screw rod 7, and an L-shaped rod 9 is fixedly connected to the outer surface of the threaded sleeve 8. A connecting groove 10 connected to the interior of the two control seats 3 is provided on the opposite surfaces of the two control seats 3. The vertical rod and one end of the horizontal rod of the L-shaped rod 9 extend out of the outside of the control seat 3 through the connecting groove 10. The upper end of the vertical rod of the L-shaped rod 9 is fixedly mounted on the lower surface of the bearing plate 6. A driving shaft 11 is arranged on the upper end of the screw rod 7, and the upper end of the driving shaft 11 penetrates into the movable seat 4. The control seat 3 is provided with a sliding hole, in which the driving shaft 11 slides, and the driving shaft 11 is rotatably connected to the bottom wall of the movable seat 4. The upper end of the driving shaft 11 is fixedly connected to the first bevel gear 13, and the inner wall of the movable seat 4 is rotatably connected to the rotating shaft 14. The outer surface of the rotating shaft 14 is fixedly sleeved with a second bevel gear 15, and the second bevel gear 15 is meshed and connected with the first bevel gear 13. The other end of the rotating shaft 14 is provided with a connecting shaft 16, and a driving structure is provided between the connecting shaft 16 and the rotating shaft 14. The other end of the connecting shaft 16 rotates through the movable seat 4 and is fixedly connected to the rotating plate 5. A lifting structure is provided on the connecting shaft 16. A support frame is fixed inside the movable seat 4, and a bearing is fixed on the upper end of the support frame. The driving shaft 11 is rotatably inserted in the bearing, and the lower end face of the first bevel gear 13 contacts the upper end face of the support frame, which supports the first bevel gear 13 and lifts smoothly.

[0028] When the screw 7 rotates, the threaded sleeve 8 moves downward under the transmission of the screw 7 thread, and the L-shaped rod 9 drives the bearing plate 6 to move downward. At the same time, the screw 7 synchronously drives the driving shaft 11 to rotate, so that the rotating shaft 14 rotates under the meshing transmission of the first bevel gear 13 and the second bevel gear 15, and the connecting shaft 16 rotates synchronously with the rotating shaft 14, so as to control the rotating plate 5 to drive the steel structure frame to flip one hundred and eighty degrees, thereby achieving the purpose of turning over the steel structure frame. The above structure does not require manual turning. After the multi-axis welding robot 202 completes welding one side of the steel structure frame, the steel structure frame can be automatically turned over, which will not affect the time of welding the steel structure frame too much, and further ensures the efficiency and speed of welding the steel structure frame.

[0029] Specifically, the lifting structure includes a driving cam 17, which is fixedly sleeved on the outer surface of the connecting shaft 16 located in the movable seat 4. The driving cam 17 is gourd-shaped, and a first contact head 19 is provided on the lower side of the driving cam 17. The first contact head 19 contacts the outer surface of the driving cam 17, and the lower surface of the first contact head 19 is fixedly connected to a support rod 18. The lower end of the support rod 18 slides through the lower surface of the movable seat 4 and is fixedly connected to the upper surface of the control seat 3. A first spring 20 is fixedly connected between the first contact head 19 and the bottom wall of the movable seat 4, and the first spring 20 is movably sleeved on the outer surface of the support rod 18.

[0030] When the connecting shaft 16 drives the rotating plate 5 to rotate one hundred and eighty degrees, the driving cam 17 rotates one hundred and eighty degrees synchronously. At the same time, since the driving cam 17 is gourd-shaped, the arc surface of the driving cam 17 will squeeze the first contact head 19 during the rotation process, so that the movable seat 4 rises as a whole. When the driving cam 17 rotates more than ninety degrees, the driving cam 17 no longer squeezes the first contact head 19. Therefore, the movable seat 4 moves downward under the push of the first spring 20. The above-mentioned lifting structure and the descent of the supporting plate 6 are carried out synchronously, which can avoid the problem of the steel structure frame contacting the supporting plate 6 when turning over, causing the problem of jamming, and further ensure the stability of the steel structure frame when turning over.

[0031] Specifically, a cross shaft 12 is fixedly connected to the upper surface of the screw rod 7, and a cross groove is provided on the lower surface of the drive shaft 11. The cross shaft 12 extends into the cross groove and slides in the cross groove. In this way, when the screw rod 7 rotates, the cross shaft 12 can synchronously drive the drive shaft 11 to rotate, and when the movable seat 4 moves upward, the cross shaft 12 synchronously slides in the cross groove.

[0032] Specifically, the driving structure includes a fixed plate 21, which is arranged between the rotating shaft 14 and the connecting shaft 16. A fixed rod 22 is fixedly connected to the upper surface of the fixed plate 21, and the upper end of the fixed rod 22 is fixedly connected to the top wall of the movable seat 4. A gear groove 24 is opened on the side surface of the connecting shaft 16 facing the fixed plate 21, and a shaft body 23 is fixedly connected to the side surface of the rotating shaft 14 facing the fixed plate 21. The other end of the shaft body 23 rotates through the fixed plate 21 and extends into the gear groove 24. The shaft body 23 is located at the center of the gear groove 24, and one end of the shaft body 23 located in the gear groove 24 is fixedly connected to a first gear 25. A plurality of second gears 26 are rotatably connected to the side surface of the fixed plate 21 facing the gear groove 24. The plurality of second gears 26 are all meshed with the outer surface of the first gear 25. A plurality of teeth are provided on the annular inner wall of the gear groove 24, and the second gears 26 are meshed with the teeth in the gear groove 24.

[0033] Therefore, the driving structure between the rotating shaft 14 and the connecting shaft 16 is a planetary gear set, so that the connecting shaft 16 rotates one hundred and eighty degrees only after the rotating shaft 14 rotates a large number of times. Therefore, when the steel structure frame rotates, the supporting plate 6 drops a large distance, which can further avoid contact between the steel structure frame and the surface of the supporting plate 6, and further ensure the stability of the supporting plate 6 when it is turned over.

[0034] Specifically, the control mechanism includes a third gear 27, which is fixedly sleeved on the outer surface of the screw rod 7. The outer side of the third gear 27 is meshedly connected with a rack 28, which is slidably connected to the bottom wall of the control seat 3. A limiting structure is provided in the control seat 3. A push rod 29 is fixedly connected to the side of the rack 28, and the other end of the push rod 29 slides through the outer surface of the control seat 3. One end of the push rod 29 located outside the control seat 3 is fixedly connected to a second contact head 30, and a second spring 31 is fixedly connected between the second contact head 30 and the outer surface of the control seat 3. The second spring 31 is movably sleeved on the outer surface of the push rod 29. When the second spring 31 is not squeezed, the second spring 31 will form a thrust on the second contact head 30, so that the initial position of the second contact head 30 is away from the side of the control seat 3, and at the same time, the side of the rack 28 connected to the push rod 29 is close to the outer surface of the control seat 3.

[0035] Specifically, an external plate 32 is fixedly connected to the outer surface of the control seat 3 near the second contact head 30, and a rotating shaft 33 is rotatably connected to the external plate 32. A lever 34 is fixedly sleeved on the outer surface of the rotating shaft 33, and one side of the lever 34 is in contact with the outer surface of the second contact head 30. At the same time, a trigger plate 207 is fixedly connected to the surface of the side of the base 201 facing the lever 34, and the other side of the trigger plate 207 is in contact with the side of the lever 34 away from the second contact head 30.

[0036] After the base 201 has completed welding on one side of the steel structure frame, it moves to one side of the standby station, and at the same time, the trigger plate 207 is displaced and contacted with the side of the lever 34 away from the second contact head 30, so that the trigger plate 207 drives the lever 34 to rotate clockwise with the rotating shaft 33 as the rotation point, so that the other side of the lever 34 will form a thrust on the second contact head 30, so that the push rod 29 pushes the rack 28 to move toward the inner side of the control seat 3, and at the same time, the rack 28 drives the third gear 27 to rotate, and the screw 7 rotates synchronously with the third gear 27.

[0037] Specifically, the rotating shaft 33 is arranged on the side of the lever 34 away from the second contact head 30. According to the lever principle, the lever arm on the side where the lever 34 contacts the trigger plate 207 is shorter. Therefore, the trigger plate 207 pushes one side of the lever 34 to move a shorter distance, and the other side of the lever 34 can push the second contact head 30 to move a longer distance, thereby avoiding as much as possible the situation where the trigger plate 207 moves a shorter distance, resulting in a shorter descending distance of the supporting plate 6.

[0038] Specifically, the limiting structure includes a clamping rod 36, which is arranged in the control seat 3 and is located on the side of the rack 28 facing away from the push rod 29. One end of the clamping rod 36 slides through the outer surface of the control seat 3. A push plate 37 is fixedly connected to the end of the clamping rod 36 located outside the control seat 3. A tension spring 38 is fixedly connected between the push plate 37 and the control seat 3. The tension spring 38 is movably sleeved on the outer surface of the clamping rod 36. The other side of the push plate 37 contacts the trigger plate 207. A corner of the rack 28 close to the clamping rod 36 is inclined. A clamping groove 35 is opened on the surface of the side of the rack 28 facing away from the third gear 27. The clamping groove 35 coincides with the end of the clamping rod 36 located in the control seat 3.

[0039] When the push rod 29 pushes the rack 28 to move, the inclined surface of the rack 28 contacts the clamping rod 36 and squeezes the clamping rod 36, causing the clamping rod 36 to move outward. At the same time, the tension spring 38 is stressed and stretched. When the rack 28 moves the maximum distance, the clamping rod 36 and the clamping groove 35 are at the same horizontal position. Therefore, the clamping rod 36 is moved into the clamping groove 35 under the pull of the tension spring 38, thereby completing the fixation of the rack 28. In this way, the rack 28 is prevented from resetting under the push of the second spring 31, causing the screw rod 7 to reverse and the steel structure frame to turn over again. After the structural frame is turned over and welded, the multi-axis welding robot 202 moves to the reset position, so that the trigger plate 207 on the base 201 contacts the push plate 37 and causes the push plate 37 to move to the side away from the control seat 3, so that the push plate 37 pulls the clamping rod 36 and separates the clamping groove 35, so that the rack 28 loses its restriction, and the rack 28 is reset under the push of the second spring 31. At the same time, the rack 28 drives the screw 7 to reverse, so that the steel structure frame after welding is turned over again, and the load-bearing plate 6 is reset to facilitate the support of the steel structure frame next time.

[0040] It should be clarified here that after the welding of one side of the steel structure frame is completed, its connection point has a certain firmness, so even if the bearing plate 6 does not support the steel structure frame, the problem of the steel structure frame falling off will not occur.

[0041] Since the reset position and the standby position of the two multi-axis welding robots 202 are set diagonally, the connection structures on the two control seats 3 and the two movable axes 4 are set in opposite directions. Therefore, when the two multi-axis welding robots 202 move to the reset position or the standby position, the control mechanisms or limiting structures on the two control seats 3 can be driven synchronously, thereby avoiding the problem of asynchronous structural linkage on the two control seats 3 as much as possible.

[0042] The present invention provides a welding method for a steel structure frame, and the specific operation steps are as follows: S1: Place the spliced ​​steel structure frame on the bearing plate 6, and at the same time, the telescopic cylinder pushes the movable control seat 3 to move to the other side of the control seat 3, so that the two rotating plates 5 can clamp the spliced ​​steel structure frame.

[0043] S2: The servo motor 204 is started, and the output shaft of the servo motor 204 synchronously drives the threaded rod 206 to rotate, so that the base 201 is displaced under the transmission of the thread of the threaded rod 206, so that the base 201 drives the multi-axis welding robot 202 to move out of the reset position and enter the welding position, so that the multi-axis welding robot 202 can perform preliminary welding on the splicing points of the steel structure frame.

[0044] S3: When the multi-axis welding robot 202 has completed welding the two welding points on one side of the steel structure frame, it moves to the standby position. During the movement, the trigger plate 207 is displaced and contacted with the side of the lever 34 away from the second contact head 30, so that the trigger plate 207 drives the lever 34 to rotate clockwise with the rotating shaft 33 as the rotation point, so that the other side of the lever 34 will form a thrust on the second contact head 30, so that the push rod 29 pushes the rack 28 to move inwardly of the control seat 3, and at the same time, the rack 28 drives the third gear 27 to rotate, and the screw 7 rotates synchronously with the third gear 27, and the screw 7 synchronously drives the drive shaft 11 to rotate, so that the rotating shaft 14 rotates under the meshing transmission of the first bevel gear 13 and the second bevel gear 15, and the connecting shaft 16 rotates synchronously driven by the driving structure, so as to control the rotating plate 5 to drive the steel structure frame to flip 180 degrees.

[0045] S4: During the rotation of the connecting shaft 16, the arc surface of the driving cam 17 will squeeze the first contact head 19, so that the movable seat 4 rises as a whole. When the driving cam 17 rotates more than ninety degrees, the driving cam 17 no longer squeezes the first contact head 19. Therefore, the movable seat 4 moves downward under the push of the first spring 20. At the same time, when the screw 7 rotates, the threaded sleeve 8 moves downward under the transmission of the screw 7 thread, and the L-shaped rod 9 drives the supporting plate 6 to move downward.

[0046] S5: When the push rod 29 pushes the rack 28 to move, the inclined surface of the rack 28 contacts the clamping rod 36 and squeezes the clamping rod 36, causing the clamping rod 36 to move outward. At the same time, the tension spring 38 is stressed and stretched. When the rack 28 moves the maximum distance, the clamping rod 36 and the clamping groove 35 are at the same horizontal position. Therefore, the clamping rod 36 is pulled into the clamping groove 35 by the tension spring 38, thereby completing the fixation of the rack 28.

[0047] S6: When the steel structure frame is turned over and welded, the multi-axis welding robot 202 moves to the reset position, so that the trigger plate 207 on the base 201 contacts the push plate 37 and causes the push plate 37 to move to the side away from the control seat 3, so that the push plate 37 pulls the clamping rod 36 and separates the clamping groove 35, so that the rack 28 loses its restriction, and the rack 28 is reset under the push of the second spring 31. At the same time, the rack 28 drives the screw 7 to reverse, so that the steel structure frame after welding is turned over again, and the load-bearing plate 6 is reset to facilitate the support of the steel structure frame next time.

[0048] Finally, it should be noted that the above are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A welding device for a steel structure frame, comprising a base plate (1), on which two movable welding assemblies (2) are arranged, characterized in that: Two control seats (3) are provided on the bottom plate (1), the control seats (3) are arranged between the two movable welding assemblies (2), each control seat (3) is provided with a movable seat (4), a rotating plate (5) and a bearing plate (6) are provided on opposite surfaces of the movable seat (4), the bearing plate (6) is located below the rotating plate (5), the two rotating plates (5) clamp and fix the steel structure frame to be welded, and the bearing plate (6) supports the steel structure frame to be welded; The control seat (3) and the movable seat (4) are both hollow structures. A screw rod (7) is rotatably connected inside the control seat (3). A control mechanism is provided on the screw rod (7). A threaded sleeve (8) is threadedly sleeved on the screw rod (7). An L-shaped rod (9) is fixedly connected to the outer surface of the threaded sleeve (8). A connecting slide groove (10) communicating with the interior of the two control seats (3) is provided on the opposite side walls. The L-shaped rod (9) passes through the connecting slide groove (10) and extends to the outside of the control seat (3). The upper end of the vertical rod of the L-shaped rod (9) is fixedly connected to the bearing plate (6). The upper end of the screw rod (7) is connected to a driving shaft (11), the driving shaft (11) penetrates into the movable seat (4) and is rotatably connected to the movable seat (4), a sliding hole is opened on the control seat (3), the driving shaft (11) slides in the sliding hole, and the upper end of the driving shaft (11) is fixedly connected to a first bevel gear (13); A rotating shaft (14) is rotatably connected to the inner wall of the movable seat (4), a second bevel gear (15) is fixed to the rotating shaft (14), the second bevel gear (15) is meshingly connected to the first bevel gear (13), a connecting shaft (16) is provided at one end of the rotating shaft (14), the connecting shaft (16) passes through the movable seat (4) and is rotatably connected to the side wall of the movable seat, the exposed end of the connecting shaft (6) is fixedly connected to the rotating plate (5), and a lifting structure is provided on the connecting shaft (16).

2. The welding device for steel structure frame according to claim 1, characterized in that: The mobile welding assembly (2) comprises a base (201), on which a multi-axis welding robot (202) is arranged. The mobile welding assembly (2) further comprises a guide rail (203), which is arranged in a horizontal direction and fixedly mounted on the base plate (1). A guide rail joint slidably connected to the guide rail (203) is provided on the lower side of the base (201). A threaded sleeve is provided with a threaded rod (206) on the base (201), and both ends of the threaded rod (206) are rotatably connected to mounting seats (205), and the mounting seats (205) are fixedly mounted on the base plate (1). A servo motor (204) is fixedly mounted on the upper surface of the base plate (1), and one end of an output shaft of the servo motor (204) rotatably passes through the mounting seat (205) and is fixedly connected to one end of the threaded rod (206).

3. The welding device for steel structure frame according to claim 1, characterized in that: The two control seats (3) are arranged vertically in parallel, one of the control seats (3) is fixedly mounted on the base plate (1), and the other control seat (3) is connected to a telescopic cylinder, one end of the telescopic cylinder is fixed to the base plate, and the control seat connected to the telescopic cylinder is slidably connected to the base plate (1).

4. The welding device for steel structure frame according to claim 1, characterized in that: The lifting structure comprises a driving cam (17), the driving cam (17) being fixedly sleeved on a connecting shaft (16) located inside the movable seat (4), the driving cam (17) being gourd-shaped, a first contact head (19) being provided below the driving cam (17), the first contact head (19) being in contact with the outer edge of the driving cam (17), a support rod (18) being fixedly connected to the lower end of the first contact head (19), the lower end of the support rod (18) slidingly passing through the lower surface of the movable seat (4), and being fixedly connected to the control seat (3), and a first spring (20) being sleeved on the support rod (18) between the first contact head (19) and the bottom wall of the movable seat (4).

5. The welding device for steel structure frame according to claim 1, characterized in that: The upper end of the screw rod (7) is fixedly connected to a cross shaft (12), the lower end of the drive shaft (11) is provided with a cross groove, the cross shaft (12) is inserted into the cross groove and is slidably connected to the cross groove; and / or A support frame is fixed inside the movable seat (4), a bearing is fixed at the upper end of the support frame, a drive shaft (11) is inserted into the bearing, and the lower end surface of the first bevel gear (13) supports the upper end of the support frame.

6. The welding device for steel structure frame according to claim 1, characterized in that: A driving structure is provided between the connecting shaft (16) and the rotating shaft (14), the driving structure comprising a fixing plate (21), the fixing plate (21) being provided between the rotating shaft (14) and the connecting shaft (16), a fixing rod (22) being fixedly connected to the outer surface of the fixing plate (21), and an upper end of the fixing rod (22) being fixedly connected to the top wall of the movable seat (4); A gear groove (24) is provided on the end surface of the connecting shaft (16) facing the fixed plate (21); a shaft body (23) is fixedly connected to the end surface of the rotating shaft (14) facing the fixed plate (21); a free end of the shaft body (23) rotates through the fixed plate (21) and extends into the gear groove (24); the shaft body (23) is located at the center of the gear groove (24); one end of the shaft body (23) located in the gear groove (24) is fixedly connected to a first gear (25); and at least two second gears (26) are rotatably connected to the end surface of the fixed plate (21) facing the gear groove (24); the second gears (26) are meshingly connected to the outer surface of the first gear (25); a plurality of teeth are provided on the annular inner wall of the gear groove (24); and the second gears (26) are meshingly connected to the teeth in the gear groove (24).

7. The welding device for steel structure frame according to claim 1, characterized in that: The control mechanism comprises a third gear (27) and a rack (28); the third gear (27) is fixedly sleeved on the screw rod (7); the third gear (27) is meshingly connected with the rack (28); the rack (28) is slidably connected on the bottom wall of the control seat (3); and a limiting structure is provided inside the control seat (3); A push rod (29) is fixedly connected to the side of the rack (28); the outer end of the push rod (29) slides through the side wall of the control seat (3) and is fixedly connected to a second contact head (30) at the end; a second spring (31) is sleeved on the push rod between the second contact head (30) and the outer surface of the control seat (3); An external plate (32) extends from the control base (3) near the bottom of the second contact head (30), and the external plate (32) is rotatably connected to a lever (34) via a rotating shaft (33), and one end of the lever (34) is in contact with the second contact head (30); a trigger plate (207) is connected to a surface of a side of the base (201) facing the lever (34), and the trigger plate (207) is in contact with the other end of the lever (34) away from the second contact head (30).

8. The welding device for steel structure frame according to claim 7, characterized in that: The lever arm in contact with the second contact head (30) is greater than the lever arm in contact with the trigger plate (207).

9. The welding device for steel structure frame according to claim 7, characterized in that: The limiting structure comprises a clamping rod (36), the clamping rod (36) being arranged in the control seat (3) and being located on a side of the rack (28) away from the push rod (29), one end of the clamping rod (36) slidingly passing through the side wall of the control seat (3), a pushing plate (37) being fixedly connected to one end of the clamping rod (36) located outside the control seat (3), a tension spring (38) being fixedly connected between the pushing plate (37) and the control seat (3), the tension spring (38) being movably sleeved on the outer surface of the clamping rod (36), the other side of the pushing plate (37) being in contact with the trigger plate (207), a corner of the rack (28) being close to the clamping rod (36) being inclined, a clamping groove (35) being provided on a surface of a side of the rack (28) facing away from the third gear (27), the clamping groove (35) being matched with an end of the clamping rod (36) located in the control seat (3).

10. A welding method for a steel structure frame, according to the welding device for a steel structure frame according to any one of claims 1 to 9, characterized in that: Here are the steps: S1. The spliced ​​steel structure frame is placed on the bearing plate (6), and at the same time, the telescopic cylinder pushes the movable control seat (3) to move toward the other side control seat (3), so that the two rotating plates (5) clamp the spliced ​​steel structure frame; S2, the servo motor (204) is started, the output shaft of the servo motor (204) synchronously drives the threaded rod (206) to rotate, the base (201) is displaced under the transmission of the threaded rod (206), and at the same time, the base (201) drives the multi-axis welding robot (202) to move out of the reset position and enter the welding position, and the multi-axis welding robot (202) performs preliminary welding on the splicing points of the steel structure frame; S3. After the multi-axis welding robot (202) has finished welding the two welding points on the front side of the steel structure frame, it moves to the standby position. The trigger plates (207) of the two multi-axis welding robots simultaneously contact the ends of the levers (34) on the outside of the two control seats (3) away from the second contact head (30), driving the levers (34) to rotate clockwise with the rotating shaft (33) as the rotating point, so that the other end of the lever (34) forms a thrust on the second contact head (30). The push rod (29) pushes the rack (28) to move into the control seat (3), and the rack (28) drives the third gear (27) to rotate. The screw (7) rotates synchronously with the third gear (27). The screw (7) synchronously drives the drive shaft (11) to rotate. The rotating shaft (14) rotates under the meshing transmission of the first bevel gear (13) and the second bevel gear (15), and the connecting shaft (16) rotates synchronously under the drive of the driving structure, so that the control rotating plate (5) drives the steel structure frame to flip 180 degrees. S4, during the rotation of the connecting shaft (16), the arc surface of the driving cam (17) presses against the first contact head (19), so that the movable seat (4) rises as a whole. When the driving cam (17) rotates more than ninety degrees, the driving cam (17) no longer presses against the first contact head (19), and the movable seat (4) moves downward under the push of the first spring (20). During the process again, the screw rod (7) rotates, and the threaded sleeve (8) moves downward under the drive of the screw rod (7), and the L-shaped rod (9) drives the bearing plate (6) to move downward. S5. When the push rod (29) pushes the rack (28) to move a certain distance, the inclined surface of the rack (28) contacts the clamping rod (36) and squeezes the clamping rod (36), so that the clamping rod (36) moves outward, and at the same time, the tension spring (38) is stressed and stretched. When the rack (28) moves the maximum distance, the clamping rod (36) and the clamping groove (35) are at the same horizontal position. Therefore, the clamping rod (36) is pulled into the clamping groove (35) by the tension spring (38), thereby completing the fixing of the rack (28); S6. After the steel structure frame is turned over and welded, the multi-axis welding robot (202) moves to the reset station, so that the trigger plate (207) on the base (201) contacts the push plate (37), and the push plate (37) is displaced to the side away from the control seat (3), so that the push plate (37) pulls the clamping rod (36) and the clamping groove (35) to separate, and the rack (28) loses its restriction and resets under the push of the second spring (31). At the same time, the rack (28) drives the screw rod (7) to reverse, so that the steel structure frame after welding is turned over again, and the bearing plate (6) is reset at the same time, which is convenient for supporting the steel structure frame next time.

Images