Welding apparatus and welding method for steel structural frames

Abstract

The application 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 opposite surfaces of the two movable seats, the bearing plates are arranged on the lower sides of the rotating plates, the control seats and the movable seats are hollow, a screw rod is rotatably connected to the bottom wall of the control seat, a control mechanism is arranged on the screw rod, a threaded sleeve is threadedly arranged on the outer surface of the screw rod, and an L-shaped rod is fixedly connected to the outer surface of the threaded sleeve. After a multi-axis welding robot completes welding on one side of the steel structure frame, the device can automatically turn over the steel structure frame, does not affect the welding time of the steel structure frame too much, and further guarantees the efficiency and speed of the welding of the steel structure frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel structure frame welding, in particular to a welding device and method for steel structure frame. BACKGROUND

[0002] The steel structure frame is a structure composed of steel materials, and is one of the main building structure types. The structure mainly comprises members such as steel beams, steel columns, and steel trusses made of profiled steel and steel plates.

[0003] After the existing steel structure frame is assembled, the connecting 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, and then weld the exposed connecting points of the steel structure frame by welding equipment. However, since the steel structure frame is placed on the welding table, the ground connecting points cannot be welded. Therefore, after welding one side of the steel structure frame, the steel structure frame needs to be manually turned over by using other auxiliary equipment. This increases the welding time of the steel structure frame, affects the efficiency and speed of welding the steel structure frame, and therefore the present inventor designs a welding device and method for steel structure frame based on the above problems. SUMMARY

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

[0005] In the first aspect, the present application provides a welding device for steel structure frame, comprising a bottom plate, two movable welding assemblies are arranged on the bottom plate, two control seats are arranged on the bottom plate, the control seats are arranged between the two movable welding assemblies, an activity seat is arranged on each control seat, a rotating plate and a bearing plate are arranged on the opposite surface of the activity 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.

[0006] The control seat and the activity seat are both hollow structures, a screw rod is rotatably connected in the control seat, a control mechanism is arranged on the screw rod, a threaded sleeve is threadedly sleeved on the screw rod, an L-shaped rod is fixedly connected to the outer surface of the threaded sleeve, a communication sliding groove is formed in the opposite side wall of each control seat and communicates with the interior thereof, the L-shaped rod extends to the outside of the control seat through the communication sliding groove, and the vertical rod of the L-shaped rod is fixedly connected to the bearing plate,

[0007] The upper end of the screw rod is connected with a driving shaft, the driving shaft penetrates into the movable seat and is rotationally connected with the movable seat, a sliding hole is formed in the control seat, the driving shaft slides in the sliding hole, the upper end of the driving shaft is fixedly connected with a first bevel gear;

[0008] A rotating shaft is rotationally connected to the inner wall of the movable seat, a second bevel gear is fixed to the rotating shaft, the second bevel gear is meshingly connected with the first bevel gear, one end of the rotating shaft is provided with a connecting shaft, the connecting shaft penetrates out of the movable seat and is rotationally connected with the side wall of the movable seat, the exposed end of the connecting shaft is fixedly connected with the rotating plate, and the connecting shaft is provided with a lifting structure.

[0009] Further, the mobile welding assembly comprises a base, a multi-axis welding robot is arranged on the base, the mobile welding assembly further comprises a guide rail, the guide rail is arranged in a horizontal transverse direction and is fixedly installed on the base plate, the lower side of the base is provided with a guide rail joint which is slidingly connected with the guide rail, a threaded rod is threadedly sleeved on the base, the two ends of the threaded rod are rotationally connected with mounting seats respectively, the mounting seats are fixedly installed on the base plate, a servo motor is fixedly installed on the upper surface of the base plate, one end of the output shaft of the servo motor rotationally penetrates out of the mounting seat and is fixedly connected with one end of the threaded rod.

[0010] Further, the two control seats are arranged in a vertical parallel manner, one of the control seats is fixedly installed on the base plate, and the other control seat is connected with a telescopic cylinder, one end of the telescopic cylinder is fixed to the base plate, and the control seat connected with the telescopic cylinder is slidingly connected with the base plate.

[0011] Further, the lifting structure comprises a driving cam, the driving cam is fixedly sleeved on the connecting shaft located in the interior of the movable seat, the driving cam is in the shape of a gourd, a first contact head is arranged below the driving cam, the first contact head is in contact with the outer edge of the driving cam, a support rod is fixedly connected to the lower end of the first contact head, the lower end of the support rod slidingly penetrates through the lower surface of the movable seat and is fixedly connected with the control seat, a first spring is sleeved on the support rod between the first contact head and the bottom wall of the movable seat.

[0012] Further, the upper end of the screw rod is fixedly connected with a cross shaft, the lower end of the driving shaft is provided with a cross groove, the cross shaft is inserted into the cross groove and is slidingly connected with the cross groove; and / or, a support frame is fixedly arranged in the movable seat, a bearing is fixedly arranged at the upper end of the support frame, the driving shaft is penetratingly arranged in the bearing, and the lower end surface of the first bevel gear is supported on the upper end of the support frame.

[0013] Furthermore, a drive structure is provided between the connecting shaft and the rotating shaft. The drive structure includes a fixed plate, which is located 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 opened on the end face of the connecting shaft facing the fixed plate. A shaft body is fixedly connected to the end face 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. A first gear is fixedly connected to one end of the shaft body located in the gear groove. Two or more second gears are rotatably connected to the end face of the fixed plate facing the gear groove. The outer surfaces of the second gears mesh with the outer surfaces of the first gears. Multiple teeth are provided on the annular inner wall of the gear groove. The second gears mesh with the teeth in the gear groove.

[0014] Furthermore, the control mechanism includes a third gear and a rack. The third gear is fixedly mounted on the screw and meshes with the rack. The rack is slidably connected to the bottom wall of the control seat. A limiting structure is provided inside 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 is fixedly connected to a second contact head at its end. A second spring is fitted on the push rod between the second contact head and the outer surface of the control seat. An outer plate extends from the bottom of the control seat near the second contact head. A lever is rotatably connected to the outer plate via a pivot. One end of the lever contacts the second contact head. A trigger plate is connected to the side surface of the base facing the lever. The trigger plate contacts the other end of the lever away from the second contact head.

[0015] Furthermore, the lever arm that contacts the second contact head is greater than the lever arm that contacts the trigger plate.

[0016] Furthermore, the limiting structure includes a locking rod, which is located inside the control seat and on the side of the rack away from the push rod. One end of the locking rod slides through the side wall of the control seat. A push plate is fixedly connected to the end of the locking rod 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 locking rod. The other side of the push plate contacts the trigger plate. The rack is inclined at one corner near the locking rod. A locking groove is opened on the side surface of the rack opposite to the third gear. The locking groove matches the end of the locking rod inside the control seat.

[0017] Secondly, the present invention provides a welding method for steel structure frames, using the above-mentioned welding apparatus, and the steps are as follows:

[0018] S1. Place the assembled steel structure frame on the bearing plate, and at the same time, push the movable control seat to the other side of the control seat with the telescopic cylinder so that the two rotating plates clamp the assembled steel structure frame.

[0019] 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 the multi-axis welding robot is displaced out of the reset station and enters the welding station, and the multi-axis welding robot preliminarily welds the splicing points of the steel structure frame;

[0020] S3, when the multi-axis welding robot welds the two welding points on the front of the steel structure frame, the trigger plates of the two multi-axis welding robots are in contact with the ends of the levers away from the second contact head on the outer sides of the two control seats, the levers are rotated clockwise around the rotation shafts, the other ends of the levers push the second contact head, the push rod drives the rack to displace towards the control seat, the rack drives the third gear to rotate, the screw rod rotates synchronously with the third gear, the driving shaft is synchronously driven to rotate by the screw rod, 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 driving of the driving structure, so that the control rotating plate drives the steel structure frame to turn over by 180 degrees.

[0021] S4, in the process of rotating the connecting shaft, the cam surface of the driving cam extrudes 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 extrudes the first contact head, at this time, the movable seat is displaced downward under the pushing of the first spring; in the process, the screw rod rotates, the threaded sleeve is displaced downward under the transmission of the screw thread, and the L-shaped rod drives the bearing plate to displace downward.

[0022] S5, when the push rod drives the rack to displace by a distance, the inclined surface of the rack is in contact with the clamping rod and extrudes the clamping rod, so that the clamping rod is displaced outward, and the tension spring is stressed and stretched, when the rack displaces by the maximum distance, the clamping rod and the clamping groove are in the same horizontal position, so the clamping rod is displaced into the clamping groove under the pulling of the tension spring, so as to fix the rack.

[0023] S6, when the steel structure frame is welded on the other side, the multi-axis welding robot moves to the reset station, so that the trigger plate on the base is in contact with the push plate and displaces the push plate away from the control seat, so that the push plate separates the clamping rod from the clamping groove, the rack is reset under the pushing of the second spring, and the rack reverses the screw rod, so that the welded steel structure frame is turned over again, and the bearing plate is reset, facilitating the support of the next steel structure frame.

[0024] Compared with the prior art, the beneficial effects of the present application are as follows:

[0025] (1) The present application does not need to be turned over manually, and can automatically turn over the steel structure frame after the multi-axis welding robot welds one side of the steel structure frame, which does not affect the welding time of the steel structure frame, and further guarantees the efficiency and speed of welding the steel structure frame.

[0026] (2) By lifting the structure and lowering the bearing plate simultaneously, the present invention avoids contact between the steel structure frame and the bearing plate when the steel structure frame is flipped, thus preventing jamming and further ensuring the stability of the steel structure frame when flipping.

[0027] (3) By setting the driving structure between the rotating shaft and the connecting shaft as a planetary gear set, the connecting shaft rotates 180 degrees after the rotating shaft rotates a number of times. Therefore, when the steel frame rotates, the bearing plate drops a greater distance, which can further avoid the steel frame from contacting the surface of the bearing plate and further ensure the stability of the bearing plate when it is flipped.

[0028] (4) In this invention, the rotating shaft is located on the side of the lever away from the second contact head. According to the lever principle, the lever arm on the side that contacts the trigger plate is shorter. Therefore, the trigger plate pushes the lever to a shorter displacement on one side, while the other side of the lever can push the second contact head to a longer displacement. This avoids the situation where the trigger plate displacement distance is too short, resulting in a shorter descent distance of the bearing plate.

[0029] (5) The present invention can fix the rack by setting a limiting structure, which avoids the problem that the rack will be reset under the push of the second spring, causing the screw to reverse and the steel structure frame to flip over again. Attached Figure Description

[0030] Figure 1 A schematic diagram of the welding device for steel structure frames provided by the present invention;

[0031] Figure 2 Side view of the internal structure of the control seat and the movable seat provided by the present invention;

[0032] Figure 3 for Figure 2 Enlarged view at point B in the middle;

[0033] Figure 4 This is a schematic diagram of the driving structure of the present invention;

[0034] Figure 5 for Figure 1 Enlarged view of point A in the middle;

[0035] Figure 6 This is a top plan view of the internal structure of the control seat of the present invention;

[0036] Figure 7 This is a schematic diagram of the drive cam structure of the present invention.

[0037] Marked in the figure: 1, the base 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; 8, threaded sleeve; 9, L-shaped rod; 10, communication chute; 11, drive shaft; 12, cross shaft; 13, first bevel gear; 14, rotating shaft; 15, second bevel gear; 16, connecting shaft; 17, drive cam; 18, support rod; 19, first contact head; 20, first spring; 21, fixed plate; 22, fixed rod; 23, shaft; 24, gear slot; 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, push plate; 38, tension spring. DETAILED DESCRIPTION

[0038] In order to fully understand the purpose, features and effects of the present application, the following specific embodiments are described in detail, but the present application is not limited to this.

[0039] As Figures 1 to 7 shown, the present application provides a kind of welding device for steel structure frame, including base plate 1, two mobile welding assemblies 2 are equipped on base plate 1, mobile welding assembly 2 includes base 201, multi-axis welding robot 202 is equipped on base 201, multi-axis welding robot 202 is prior art known technology and not too much repetition here, mobile welding assembly 2 further includes two guide rails 203, two guide rails 203 are transversely horizontally arranged, and fixedly installed on base plate 1, the lower side of base 201 is equipped with guide rail joint slidably connected with guide rail 203, threaded sleeve is equipped with threaded rod 206 on base 201, two mounting seats 205 are rotatably connected with the two ends of threaded rod 206 respectively, two mounting seats 205 are fixedly installed on base plate 1, the upper surface of base plate 1 is fixedly installed with servo motor 204, the output shaft of servo motor 204 one end rotatably penetrates out mounting seat 205, and is fixedly connected with the one end of threaded rod 206.

[0040] In use, the servo motor 204 is started, 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 threaded transmission of the threaded rod 206, so that the base 201 can drive the multi-axis welding robot 202 to reciprocate 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 movement trajectory of the multi-axis welding robot 202 is divided into different stations, which can be subdivided into reset stations, welding stations and standby stations. According to the experience that the frame is generally welded diagonally, the reset stations and standby stations of the two multi-axis welding robots 202 are diagonally arranged, so that when the two multi-axis welding robots 202 move to the corresponding welding stations, the diagonal of the steel structure frame can be welded first.

[0041] Specifically, the bottom plate 1 is provided with two control seats 3, and the two control seats 3 are vertically and parallelly arranged. The bottom of one control seat 3 is fixedly installed on the bottom plate 1, and the bottom of the other control seat 3 is slidably connected to the bottom plate 1 and provided with an extension cylinder at the back. The extension cylinder is fixedly installed on the bottom plate 1, and one end of the extension cylinder is fixedly installed on the back of the control seat 3. Thus, the control seat 3 can be displaced by the extension cylinder.

[0042] Specifically, the two control seats 3 are arranged between the two movable welding assemblies 2. The two control seats 3 are provided with two movable seats 4, and the two movable seats 4 are provided with two rotating plates 5 and two bearing plates 6 on opposite surfaces. The bearing plates 6 are arranged on the lower side of the rotating plates 5. In use, the steel structure frame after splicing is placed on the bearing plates 6, and the movable control seat 3 is displaced to the side of the other control seat 3, so that the two rotating plates 5 can clamp the steel structure frame after splicing.

[0043] Specifically, the control seat 3 and the movable seat 4 are hollow inside, the bottom wall of the control seat 3 is rotatably connected with a screw rod 7, the screw rod 7 is provided with a control mechanism, the outer surface of the screw rod 7 is threadedly sleeved with a threaded sleeve 8, the outer surface of the threaded sleeve 8 is fixedly connected with an L-shaped rod 9, the opposite faces of the two control seats 3 are both provided with a communication sliding groove 10 which is in communication with the inside thereof, the vertical rod and one end of the horizontal rod of the L-shaped rod 9 both extend out of the outside of the control seat 3 through the communication sliding groove 10, the upper end of the vertical rod of the L-shaped rod 9 is fixedly installed on the lower surface of the bearing plate 6, the upper end of the screw rod 7 is provided with a driving shaft 11, the upper end of the driving shaft 11 penetrates into the movable seat 4, meanwhile, a sliding hole is formed in the control seat 3, the driving shaft 11 slides in the sliding hole, and the driving shaft 11 is rotatably connected with the bottom wall of the movable seat 4, the upper end of the driving shaft 11 is fixedly connected with a first bevel gear 13, the inner wall of the movable seat 4 is rotatably connected with a rotating shaft 14, the outer surface of the rotating shaft 14 is fixedly sleeved with a second bevel gear 15, the second bevel gear 15 is meshingly connected with the first bevel gear 13, the other end of the rotating shaft 14 is provided with a connecting shaft 16, the connecting shaft 16 and the rotating shaft 14 are provided with a driving structure therebetween, the other end of the connecting shaft 16 rotatably penetrates out of the movable seat 4 and is fixedly connected with the rotating plate 5, and the connecting shaft 16 is provided with a lifting structure.

[0044] When the screw rod 7 rotates, the threaded sleeve 8 is displaced downward under the transmission of the screw thread of the screw rod 7, meanwhile, the L-shaped rod 9 drives the bearing plate 6 to be displaced downward, meanwhile, the screw rod 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 overturn one hundred and eighty degrees, so as to achieve the purpose of turning over the steel structure frame, and the above structure does not need to be manually turned over, and can automatically turn over the steel structure frame after the multi-axis welding robot 202 welds one side of the steel structure frame, which does not affect the time of welding the steel structure frame too much, and further guarantees the efficiency and speed of welding the steel structure frame.

[0045] Specifically, the lifting structure comprises a driving cam 17, the driving cam 17 is fixedly sleeved on the outer surface of the connecting shaft 16 located inside the movable seat 4, the driving cam 17 is in the shape of a gourd, the lower side of the driving cam 17 is provided with a first contact head 19, the first contact head 19 is in contact with the outer surface of the driving cam 17, the lower surface of the first contact head 19 is fixedly connected with a supporting rod 18, the lower end of the supporting rod 18 slidably penetrates out of the lower surface of the movable seat 4 and is fixedly connected with the upper surface of the control seat 3, the first contact head 19 and the bottom wall of the movable seat 4 are fixedly connected with a first spring 20, and the first spring 20 is movably sleeved on the outer surface of the supporting rod 18.

[0046] 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, and at the same time, because the driving cam 17 is in the shape of a gourd, the arc surface of the driving cam 17 will press the first contact head 19 during the rotation process, so that the movable seat 4 rises as a whole, and when the driving cam 17 rotates more than ninety degrees, the driving cam 17 no longer presses the first contact head 19, so that the movable seat 4 is displaced downward under the pushing of the first spring 20, and the lifting structure and the synchronous lowering of the bearing plate 6 are adopted, so as to avoid the contact between the steel structure frame and the bearing plate 6 during the turning of the steel structure frame, so as to avoid the problem of being stuck, and further ensure the stability of the steel structure frame during the turning.

[0047] Specifically, the upper surface of the screw rod 7 is fixedly connected with the cross shaft 12, the lower surface of the driving shaft 11 is provided with a cross groove, the cross shaft 12 extends into the cross groove and slides in the cross groove, so that when the screw rod 7 rotates, the cross shaft 12 can synchronously drive the driving shaft 11 to rotate, and when the movable seat 4 is displaced upward, the cross shaft 12 synchronously slides in the cross groove.

[0048] Specifically, the driving structure includes a fixed plate 21, which is arranged between the rotating shaft 14 and the connecting shaft 16, the upper surface of the fixed plate 21 is fixedly connected with a fixed rod 22, the upper end of the fixed rod 22 is fixedly connected with the top wall of the movable seat 4, the side surface of the connecting shaft 16 facing the fixed plate 21 is provided with a gear groove 24, the side surface of the rotating shaft 14 facing the fixed plate 21 is fixedly connected with a shaft body 23, the other end of the shaft body 23 penetrates out of 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, the end of the shaft body 23 located in the gear groove 24 is fixedly connected with a first gear 25, the side surface of the fixed plate 21 facing the gear groove 24 is rotatably connected with a plurality of second gears 26, the plurality of second gears 26 are rotatably connected with the outer surface of the first gear 25, and the annular inner wall of the gear groove 24 is provided with a plurality of teeth, and the second gear 26 is rotatably connected with the teeth in the gear groove 24.

[0049] 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, so that the bearing plate 6 is lowered by a large distance when the steel structure frame rotates, which can further avoid the contact between the steel structure frame and the surface of the bearing plate 6, and further ensure the stability of the bearing plate 6 during the turning.

[0050] Specifically, the control mechanism comprises a third gear 27 fixedly sleeved on the outer surface of the screw rod 7, the outer side of the third gear 27 is engaged with a rack 28, the rack 28 is slidingly connected on the bottom wall of the control seat 3, the control seat 3 is internally provided with a limiting structure, the side surface of the rack 28 is fixedly connected with a push rod 29, the other end of the push rod 29 slidingly penetrates out of the outer surface of the control seat 3, the end of the push rod 29 located outside the control seat 3 is fixedly connected with a second contact head 30, the second contact head 30 is fixedly connected with a second spring 31 between 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 extruded, the second spring 31 will form a pushing force 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 the side of the rack 28 connected with the push rod 29 is close to the outer surface of the control seat 3.

[0051] Specifically, the outer surface of the control seat 3 close to the second contact head 30 is fixedly connected with an external plate 32, the external plate 32 is rotatably connected with a rotating shaft 33, the outer surface of the rotating shaft 33 is fixedly sleeved with a lever 34, one side of the lever 34 is in contact with the outer surface of the second contact head 30, and the side surface of the base 201 facing the lever 34 is fixedly connected with a trigger plate 207, 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.

[0052] When the base 201 moves to the side of the standby station after welding on one side of the steel structure frame is completed, the trigger plate 207 is in displacement contact 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 around the rotating shaft 33, so that the other side of the lever 34 will form a pushing force on the second contact head 30, and thus the push rod 29 pushes the rack 28 to displace to the inner side of the control seat 3, and the rack 28 drives the third gear 27 to rotate, and the screw rod 7 rotates synchronously with the third gear 27.

[0053] Specifically, the rotating shaft 33 is located on the side of the lever 34 away from the second contact head 30, so according to the lever principle, the side of the lever 34 in contact with the trigger plate 207 has a shorter force arm, so the side of the lever 34 pushed by the trigger plate 207 has a shorter displacement distance, and the other side of the lever 34 can push the second contact head 30 to have a longer displacement distance, so as to avoid the situation that the displacement distance of the trigger plate 207 is too short, resulting in that the lowering distance of the bearing plate 6 is too short.

[0054] Specifically, the limiting structure comprises a clamping rod 36 arranged in the control seat 3 and located on the side of the rack 28 opposite to the push rod 29, one end of the clamping rod 36 slidingly penetrates the outer surface of the control seat 3, the end of the clamping rod 36 located outside the control seat 3 is fixedly connected with a push plate 37, the push plate 37 is fixedly connected with a tension spring 38 between 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 is in contact with the trigger plate 207, the corner of the rack 28 close to the clamping rod 36 is arranged in an inclined manner, and the surface of the side of the rack 28 opposite to the third gear 27 is provided with a clamping groove 35 matched with the end of the clamping rod 36 located in the control seat 3.

[0055] When the push rod 29 pushes the rack 28 to displace, the inclined surface of the rack 28 is in contact with the clamping rod 36 and extrudes the clamping rod 36, so that the clamping rod 36 is displaced to the outside, and the tension spring 38 is stressed and stretched, when the rack 28 is displaced by the maximum distance, the clamping rod 36 and the clamping groove 35 are located at the same horizontal position, so that the clamping rod 36 is displaced into the clamping groove 35 under the pulling of the tension spring 38, so as to complete the fixation of the rack 28, thereby avoiding the problem that the rack 28 is reset under the pushing of the second spring 31, the screw rod 7 is reversed, and the steel structure frame is turned over again, when 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 is in contact with the push plate 37 and displaces the push plate 37 away from the control seat 3, so that the push plate 37 pulls the clamping rod 36 away from the clamping groove 35, so that the rack 28 is not limited, and the rack 28 is reset under the pushing of the second spring 31, and the screw rod 7 is reversed, so that the steel structure frame welded is turned over again, and the bearing plate 6 is reset, facilitating the support of the steel structure frame next time.

[0056] It should be clarified here that when one side of the steel structure frame is welded, the connecting 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.

[0057] Since the reset station and the standby station of the two multi-axis welding robots 202 are diagonally arranged, the connecting structures on the two control seats 3 and the two movable shafts 4 are arranged in opposite directions, so that when the two multi-axis welding robots 202 move to the reset station or the standby station, the control mechanisms or limiting structures on the two control seats 3 can be synchronously driven, thereby avoiding the problem that the structures on the two control seats 3 are not synchronized.

[0058] The application provides a welding method for a steel structure frame, and the specific operation steps are as follows:

[0059] S1: the assembled steel structure frame is placed on the bearing plate 6, and the telescopic cylinder pushes the movable control seat 3 to displace to the side of the other control seat 3, so that the two rotating plates 5 can clamp the assembled steel structure frame.

[0060] S2: the servo motor 204 is started, 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 threaded transmission of the threaded rod 206, so that the base 201 drives the multi-axis welding robot 202 to displace out of the reset station and enter the welding station, so that the multi-axis welding robot 202 can preliminarily weld the splicing points of the steel structure frame.

[0061] S3: when the multi-axis welding robot 202 welds the two welding points on one side of the steel structure frame, it moves to the standby station, in the moving process, the trigger plate 207 is in contact 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 around the rotating shaft 33, so that the other side of the lever 34 forms a pushing force on the second contact head 30, and the push rod 29 pushes the rack 28 to displace to the inside of the control seat 3, and the rack 28 drives the third gear 27 to rotate, the screw rod 7 rotates synchronously with the third gear 27, and the driving shaft 11 is synchronously driven by the screw rod 7 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 under the driving of the driving structure, so that the rotating plate 5 drives the steel structure frame to turn one hundred and eighty degrees.

[0062] S4: in the process of rotating the connecting shaft 16, the cam surface of the driving cam 17 will extrude 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 extrudes the first contact head 19, so that the movable seat 4 is displaced downward under the pushing of the first spring 20, and when the screw rod 7 rotates, the threaded sleeve 8 is displaced downward under the threaded transmission of the screw rod 7, and the L-shaped rod 9 drives the bearing plate 6 to displace downward.

[0063] S5: when the push rod 29 pushes the rack 28 to displace, the inclined surface of the rack 28 is in contact with the clamping rod 36 and extrudes the clamping rod 36, so that the clamping rod 36 displaces outward, and the tension spring 38 is stressed and stretched, when the rack 28 displaces the maximum distance, the clamping rod 36 is in the same horizontal position with the clamping groove 35, so that the clamping rod 36 is displaced into the clamping groove 35 under the pulling of the tension spring 38, so as to fix the rack 28.

[0064] S6: When the steel structure frame is finished with the turn-over welding, 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 base 3, so that the push plate 37 pulls the clamping rod 36 away from the clamping groove 35, so that the rack 28 loses the restriction, and the rack 28 is reset under the push of the second spring 31, and 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 at the same time the bearing plate 6 is reset, facilitating the support of the next steel structure frame.

[0065] Finally, it should be noted that: the above-mentioned is only the preferred embodiment of the present application, of course, those skilled in the art can modify and change the present application, if these modifications and changes belong to the scope of the claims of the present application and its equivalent technology, should be considered as the protection scope of the present application.

Claims

1. A welding device for steel structure frame, comprising a base plate (1), two mobile welding assemblies (2) are arranged on the base plate (1), characterized in that, The bottom plate (1) is provided with two control seats (3), the control seats (3) are arranged between the two mobile welding assemblies (2), each control seat (3) is provided with a movable seat (4), the movable seat (4) is provided with a rotating plate (5) on the opposite surface, a 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, the control seat (3) is rotatably connected with a screw rod (7), the screw rod (7) is provided with a control mechanism, the screw rod (7) is threadedly sleeved with a threaded sleeve (8), the outer surface of the threaded sleeve (8) is fixedly connected with an L-shaped rod (9), the opposite side walls of the two control seats (3) are both provided with a communication sliding groove (10) in communication with the interiors thereof, the L-shaped rod (9) extends to the outside of the control seat (3) through the communication sliding groove (10), and the vertical rod of the L-shaped rod (9) is fixedly connected with the bearing plate (6), The upper end of the screw rod (7) is connected with a driving shaft (11), the driving shaft (11) penetrates into the movable seat (4) and is rotatably connected with the movable seat (4), the control seat (3) is provided with a sliding hole, the driving shaft (11) slides in the sliding hole, and the upper end of the driving shaft (11) is fixedly connected with a first bevel gear (13); The inner wall of the movable seat (4) is rotatably connected with a rotating shaft (14), the rotating shaft (14) is fixedly connected with a second bevel gear (15), the second bevel gear (15) is in meshing connection with the first bevel gear (13), one end of the rotating shaft (14) is provided with a connecting shaft (16), the connecting shaft (16) penetrates out of the movable seat (4) and is rotatably connected with the side wall of the movable seat, the exposed end of the connecting shaft (16) is fixedly connected with the rotating plate (5), and the connecting shaft (16) is provided with a lifting structure; The lifting structure comprises a driving cam (17), the driving cam (17) is fixedly sleeved on the connecting shaft (16) in the movable seat (4), the driving cam (17) is in the shape of a calabash, a first contact head (19) is arranged below the driving cam (17), the first contact head (19) is in contact with the outer edge of the driving cam (17), the lower end of the first contact head (19) is fixedly connected with a supporting rod (18), the lower end of the supporting rod (18) slides through the lower surface of the movable seat (4) and is fixedly connected with the control seat (3), a first spring (20) is sleeved on the supporting rod (18) between the first contact head (19) and the bottom wall of the movable seat (4); The upper end of the screw rod (7) is fixedly connected with a cross shaft (12), the lower end of the driving shaft (11) is provided with a cross groove, the cross shaft (12) is inserted into the cross groove and is in sliding connection with the cross groove; A driving structure is arranged between the connecting shaft (16) and the rotating shaft (14), the driving structure comprises a fixed plate (21), the fixed plate (21) is arranged between the rotating shaft (14) and the connecting shaft (16), the outer surface of the fixed plate (21) is fixedly connected with a fixed rod (22), and the upper end of the fixed rod (22) is fixedly connected with the top wall of the movable seat (4). A gear groove (24) is formed on the end face of the connecting shaft (16) facing the fixed plate (21), a shaft body (23) is fixedly connected to the end face of the rotating shaft (14) facing the fixed plate (21), the free end of the shaft body (23) penetrates 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), a first gear (25) is fixedly connected to one end of the shaft body (23) located in the gear groove (24), two or more second gears (26) are rotatably connected to the end face of the fixed plate (21) facing the gear groove (24), the second gears (26) are in meshing connection with the outer surface of the first gear (25), a plurality of teeth are arranged on the annular inner wall of the gear groove (24), and the second gears (26) are in meshing connection with the teeth in the gear groove (24).

2. The welding apparatus for a steel structure frame according to claim 1, characterized by, The mobile welding assembly (2) comprises a base (201), and a multi-axis welding robot (202) is arranged on the base (201); the mobile welding assembly (2) further comprises a guide rail (203) arranged in a horizontal transverse direction and fixedly installed on the bottom plate (1); a guide rail joint in sliding connection with the guide rail (203) is arranged on the lower side of the base (201); a threaded rod (206) is threadedly sleeved on the base (201); mounting seats (205) are rotatably connected to the two ends of the threaded rod (206); the mounting seats (205) are fixedly installed on the bottom plate (1); a servo motor (204) is fixedly installed on the upper surface of the bottom plate (1); one end of the output shaft of the servo motor (204) penetrates through the mounting seat (205) and is fixedly connected to one end of the threaded rod (206).

3. The welding apparatus for a steel structural frame according to claim 2, characterized by, The two control seats (3) are arranged in vertical parallel; one of the control seats (3) is fixedly installed on the bottom plate (1); the other control seat (3) is connected with a telescopic cylinder; one end of the telescopic cylinder is fixed on the bottom plate; and the control seat connected with the telescopic cylinder is in sliding connection with the bottom plate (1).

4. The welding apparatus for a steel structure frame according to claim 3, characterized by, The movable seat (4) is fixedly provided with a support frame, the support frame is fixedly provided with a bearing at the upper end, and the driving shaft (11) is arranged in the bearing.

5. The welding apparatus for a steel structural frame according to claim 4, wherein 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 in meshing connection with the rack (28); the rack (28) is in sliding connection with the bottom wall of the control seat (3); and the control seat (3) is provided with a limiting structure; The rack (28) is fixedly connected with a push rod (29); the outer end of the push rod (29) penetrates through the side wall of the control seat (3) and is fixedly connected with a second contact head (30) at the end; and 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); The control seat (3) extends an external plate (32) near the bottom of the second contact head (30), the external plate (32) is rotationally connected with a lever (34) through a rotating shaft (33), one end of the lever (34) is in contact with the second contact head (30); a trigger plate (207) is connected on the side surface of the base (201) facing the lever (34), the trigger plate (207) is in contact with the other end of the lever (34) away from the second contact head (30).

6. The welding apparatus for a steel structural frame according to claim 5, wherein The lever arm in contact with the second contact head (30) is larger than the lever arm in contact with the trigger plate (207).

7. The welding apparatus for a steel structural frame according to claim 6, wherein The limiting structure comprises a clamping rod (36), which is arranged in the control seat (3) and located on the side of the rack (28) away from the push rod (29), one end of the clamping rod (36) slides through the side wall of the control seat (3), the end of the clamping rod (36) outside the control seat (3) is fixedly connected with a push plate (37), 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) is in contact with the trigger plate (207), the corner of the rack (28) near the clamping rod (36) is arranged obliquely, a clamping groove (35) is formed on the side surface of the rack (28) away from the third gear (27), and the clamping groove (35) is matched with the end of the clamping rod (36) in the control seat (3).

8. A welding method for a steel structural frame, the welding apparatus for a steel structural frame according to claim 7, characterized by, The steps are as follows: S1, place the spliced steel structure frame on the bearing plate (6), and at the same time, the telescopic cylinder drives the movable control seat (3) to displace to the other 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 displace out of the reset station and enter the welding station, and the multi-axis welding robot (202) preliminarily welds the splicing points of the steel structure frame; S3, when the multi-axis welding robot (202) welds the two welding points on the front of the steel structure frame, it moves to the standby station, the trigger plates (207) of the two multi-axis welding robots are in contact with the ends of the levers (34) away from the second contact heads (30) on the outer sides of the two control seats (3) at the same time, the levers (34) are driven to rotate clockwise around the rotating shafts (33) as the rotating points, so that the other ends of the levers (34) form a pushing force on the second contact heads (30), the push rods (29) push the racks (28) to displace into the control seats (3), the racks (28) drive the third gears (27) to rotate, the screw rods (7) rotate synchronously with the third gears (27), the screw rods (7) synchronously drive the driving shafts (11) to rotate, the rotating shafts (14) rotate under the meshing transmission of the first bevel gears (13) and the second bevel gears (15), and the connecting shafts (16) rotate synchronously under the driving of the driving structure, so that the rotating plates (5) drive the steel structure frame to turn one hundred and eighty degrees. S4, in the process of rotating the connecting shaft (16), the cam surface of the driving cam (17) extrudes 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 extrudes the first contact head (19), at this time the movable seat (4) is displaced downward under the push of the first spring (20); in this process, the screw rod (7) rotates, the threaded sleeve (8) is displaced downward under the transmission of the screw thread of the screw rod (7), the L-shaped rod (9) drives the bearing plate (6) to displace downward; S5, when the push rod (29) pushes the rack (28) to displace a distance, the inclined surface of the rack (28) contacts and extrudes the clamping rod (36), so that the clamping rod (36) displaces outward, at the same time the tension spring (38) is stressed and stretched, when the rack (28) displaces the maximum distance, the clamping rod (36) and the clamping groove (35) are in the same horizontal position, so the clamping rod (36) is displaced into the clamping groove (35) under the pull of the tension spring (38), thereby completing the fixation 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 makes the push plate (37) displace away from the control seat (3), so that the push plate (37) pulls the clamping rod (36) and the clamping groove (35) apart, the rack (28) loses the 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 welded steel structure frame is turned over again, and the bearing plate (6) resets, which is convenient for supporting the next steel structure frame.

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