Automatic welding system based on steel structure connection

Abstract

The invention discloses an automatic welding system based on steel structure connection, and relates to the technical field of welding. The welding manipulator is arranged on the rack; two clamping mechanisms; two feeding mechanisms; a driving mechanism; the process that the rotating shaft rotates in the first direction has a discharging stroke, a steel pipe feeding stroke and a clamping stroke. The rotating shaft has a butt joint stroke and a reset stroke in the process of rotating in the second direction. Through rotation of the rotating shaft in the first direction, discharging of welded steel pipes is achieved, the feeding mechanism is driven to feed the to-be-welded steel pipes, the two clamping mechanisms clamp the to-be-welded steel pipes on the two sides correspondingly, and after clamping is completed, the two to-be-welded steel pipes are overturned by 180 degrees so that the two to-be-welded steel pipes can be located between the two clamping mechanisms; and the rotating shaft rotates in the second direction to drive the two clamping mechanisms to get close to each other, so that the two to-be-welded steel pipes are driven to get close to each other and abut against each other, and the welding action of the steel pipes is completed by the welding manipulator.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to an automatic welding system based on steel structure connection. Background Art

[0002] Welding, also known as fusion, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. There are many sources of energy for modern welding, including gas flame, arc, laser, electron beam, friction and ultrasound. In addition to being used in factories, welding can also be carried out in a variety of environments, such as outdoors, underwater and in space. No matter where it is, welding may pose a danger to the operator, so appropriate protective measures must be taken when welding.

[0003] For example, the publication number is: CN221716125U, and the name is: "A steel pipe welding platform", which includes a workbench, an installation sleeve is provided on the workbench, a second motor is installed on the workbench, the output end of the second motor is transmission connected with a screw, the outer wall of the screw is threadedly connected with a moving rod, the inner wall of the installation sleeve is fixedly connected with an abutment sleeve, the abutment sleeve can abut against the steel pipe, the side wall of the moving rod is fixedly connected with an abutment disk, a first driving member for driving the abutment disk to rotate is provided on the workbench, one end of the abutment disk is fixedly connected with an insertion rod, a plurality of first sliding grooves are evenly arranged on the outer wall of the insertion rod in a circumferential direction, a first sliding block is slidingly provided on the inner wall of the first sliding groove, a curved plate is fixedly connected to the side wall of the first sliding block, the curved plate can abut against the inner wall of the steel pipe, and a driving mechanism for driving the first sliding block to move is provided on the abutment disk.

[0004] The disadvantages of the prior art such as the above-mentioned patent are that when welding two steel pipes, workers are usually required to butt the two steel pipes together, and the manual butt connection method may cause problems with butt connection accuracy, thereby affecting the subsequent welding quality; in addition, after the welding work is completed, workers are required to remove the two completed welded components and re-place the two steel pipes to be welded, which greatly reduces the welding efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic welding system based on steel structure connection to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solution: an automatic welding system based on steel structure connection, comprising:

[0007] frame;

[0008] A welding manipulator, which is arranged on a frame;

[0009] Two clamping mechanisms are symmetrically arranged on the frame for sliding and rotating, each clamping mechanism comprises a cross bar, and clamping assemblies are arranged at both ends of the cross bar. The clamping assemblies comprise a plurality of round support rods slidably connected to the end surface of the cross bar, and each round support rod abuts against the inner wall of the steel pipe;

[0010] Two feeding mechanisms are symmetrically arranged on the frame, each feeding mechanism comprises a fixed plate, a feeding plate is rotatably connected to the fixed plate, and the feeding plate abuts and cooperates with the steel pipe placed on the fixed plate;

[0011] A driving mechanism, comprising a rotating shaft rotatably connected to the frame;

[0012] The process of the rotating shaft rotating along the first direction includes a discharge stroke, a steel pipe loading stroke and a clamping stroke;

[0013] In the unloading stroke: the two clamping mechanisms move away from each other, so that the clamping components at one end of the two clamping mechanisms release the clamping of the welded steel pipe, so that the welded steel pipe falls from between the two clamping components;

[0014] In the steel pipe feeding stroke: both unloading plates rotate, driving the steel pipe to be welded at the bottom of the two fixed plates to roll down, and abut the remaining steel pipes on the two fixed plates;

[0015] In the clamping stroke: the two clamping mechanisms are separated from each other by the clamping assembly at one end, and the steel pipes to be welded rolled down from the two fixed plates are clamped one by one, and the two clamping mechanisms are rotated 180 degrees with the midpoint of the axis of the crossbar as the center, so that the two steel pipes to be welded are located between the two clamping mechanisms;

[0016] The process of the rotating shaft rotating along the second direction includes a docking stroke and a reset stroke;

[0017] In the butt joint stroke: the two clamping mechanisms approach each other to butt the two steel pipes to be welded;

[0018] In the reset stroke: the two unloading plates are driven to rotate and reset, and the two unloading plates are respectively and one by one correspondingly abutted against the steel pipes to be welded which are located at the bottom of the two fixed plates at this time.

[0019] Furthermore, a sleeve is rotatably provided on the cross bar, an oblique groove is provided on the sleeve, a straight groove is provided on the cross bar, a translation plate is slidably connected in the cross bar, an abutment rod is fixedly connected to the translation plate, the abutment rod slides and abuts in the straight groove and the oblique groove at the same time, and the translation plate abuts and cooperates with the clamping components located at both ends of the rod.

[0020] Furthermore, the clamping assembly includes a sliding plate slidably connected to the cross bar, the sliding plate abuts against the translation plate, an elastic member is provided between the sliding plate and the inner wall of the cross bar, a plurality of connecting rods are rotatably connected to the sliding plate, and each connecting rod is rotatably connected to each supporting round rod one by one.

[0021] Furthermore, the driving mechanism also includes an abutment frame fixedly connected to the rotating shaft, and two fixing plates are fixedly connected to the frame, and through grooves are formed on the two fixing plates.

[0022] Furthermore, the abutting frame is composed of a first section, a second section and a third section which are connected.

[0023] Furthermore, the through groove is composed of an inclined section and a horizontal section connected to each other.

[0024] Furthermore, it includes two rotating mechanisms, each rotating mechanism includes a worm rotatably connected to the cross bar, a worm wheel fixedly connected to the sleeve, the worm meshing with the worm wheel, a first pulley fixedly connected to the worm, a straight rod directly slidingly abutting against the through groove and the abutment frame, a second pulley fixedly connected to the straight rod, a first belt is arranged between the first pulley and the second pulley, a ratchet is fixedly connected to the straight rod, a first gear is rotatably connected to the second pulley, a pawl is elastically arranged on the first gear, the pawl is snap-fitted with the ratchet, a first rack and a second rack are fixedly connected to the fixed plate, and the first gear meshes with the first rack and the second rack respectively.

[0025] Furthermore, the feeding mechanism also includes a third pulley fixedly connected to the rotating shaft, a fourth pulley is rotatably connected to the fixed plate, a second belt is arranged between the third pulley and the fourth pulley, an incomplete gear is fixedly connected to the fourth pulley, a second gear is fixedly connected to the unloading plate, and the incomplete gear is meshed with the second gear.

[0026] Furthermore, the blanking plate is provided with a pipe blocking portion and a lower pipe notch.

[0027] Furthermore, the elastic member is a compression spring.

[0028] In the above technical scheme, the present invention provides an automatic welding system based on steel structure connection: by rotating the rotating shaft in the first direction, the unloading of the welded steel pipe is realized, and the loading mechanism is driven to load the steel pipe to be welded, and the two clamping mechanisms respectively clamp the steel pipes to be welded on both sides. After clamping, the two steel pipes to be welded are flipped 180 degrees so that the two steel pipes to be welded are located between the two clamping mechanisms; by rotating the rotating shaft in the second direction, the two clamping mechanisms are driven to approach each other, thereby driving the two steel pipes to be welded to approach and abut and butt, and the welding action of the steel pipe is completed by the welding robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0030] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the overall structure provided by an embodiment of the present invention from a front view perspective;

[0032] Figure 3 A schematic diagram of a side view of the overall structure provided by an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the structure of the clamping mechanism, the rotating mechanism, and the driving mechanism provided in an embodiment of the present invention;

[0034] Figure 5 A schematic diagram of the structure of a clamping mechanism and a rotating mechanism provided in an embodiment of the present invention;

[0035] Figure 6 A schematic diagram of the structure of a clamping mechanism provided in an embodiment of the present invention;

[0036] Figure 7 A schematic diagram of a cross-section structure of a cross bar provided in an embodiment of the present invention;

[0037] Figure 8 A schematic diagram of the structure of a rotating mechanism provided in an embodiment of the present invention;

[0038] Fig. 9 A schematic diagram of the structure of a driving mechanism provided in an embodiment of the present invention;

[0039] Fig.10 A schematic diagram of the structure of a feeding mechanism provided in an embodiment of the present invention;

[0040] Fig.11 A schematic diagram of the blanking plate structure provided in an embodiment of the present invention.

[0041] Description of reference numerals:

[0042] 1. Frame; 2. Welding manipulator; 3. Clamping mechanism; 31. Crossbar; 311. Straight groove; 32. Sleeve; 321. Oblique groove; 33. Translation plate; 34. Abutment rod; 35. Sliding plate; 36. Connecting rod; 37. Supporting rod; 38. Elastic member; 4. Rotating mechanism; 41. Worm; 42. Worm wheel; 43. First pulley; 44. Straight rod; 45. Second pulley; 46. First belt; 47. Ratchet; 48. First gear; 49. Ratchet; 410. The first rack; 411, the second rack; 5, the driving mechanism; 51, the rotating shaft; 52, the abutting frame; 521, the first section; 522, the second section; 523, the third section; 53, the fixing plate; 531, the inclined section; 532, the horizontal section; 6, the feeding mechanism; 61, the tube supporting plate; 62, the third pulley; 63, the fourth pulley; 64, the second belt; 65, the incomplete gear; 66, the second gear; 67, the unloading plate; 671, the tube blocking part; 672, the lower tube notch. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0044] See also Figure 1-11 An embodiment of the present invention provides an automatic welding system based on steel structure connection, including: a frame 1; a welding robot 2, which is arranged on the frame 1; it should be understood that through the flexible welding robot 2, welding operations can be performed around a circle of the steel pipe.

[0045] Two clamping mechanisms 3 are symmetrically arranged on the frame 1 in a sliding and rotating manner. Each clamping mechanism 3 includes a cross bar 31. Clamping assemblies are arranged at both ends of the cross bar 31. The clamping assemblies include a plurality of supporting round bars 37 slidably connected to the end faces of the cross bar 31, wherein each supporting round bar 37 slides radially along the cross bar 31; each supporting round bar 37 abuts against the inner wall of the steel pipe; the steel pipe is clamped by the supporting round bars 37 abutting against the inner wall of the steel pipe.

[0046] Specifically, a sleeve 32 is rotatably sleeved on the cross bar 31, an inclined groove 321 is opened on the sleeve 32, a straight groove 311 is opened on the cross bar 31, and a translation plate 33 is slidably connected in the cross bar 31, wherein the translation plate 33 is slidably connected along the axial direction of the cross bar 31; an abutment rod 34 is fixedly connected to the translation plate 33; the abutment rod 34 slides and abuts in the straight groove 311 and the inclined groove 321 at the same time, and the translation plate 33 abuts and cooperates with the clamping components located at both ends of the cross bar 31.

[0047] More specifically, the clamping assembly includes a sliding plate 35 slidably connected to the cross bar 31, the sliding plate 35 abuts against the translation plate 33, and an elastic member 38 is provided between the sliding plate 35 and the inner wall of the cross bar 31; wherein the elastic member 38 is a compression spring; a plurality of connecting rods 36 are rotatably connected to the sliding plate 35, and each connecting rod 36 is rotatably connected to each supporting round rod 37 one by one.

[0048] It can be understood that when the sleeve 32 rotates, the translation plate 33 can be driven to slide in the cross bar 31 through the cooperation of the inclined groove 321, the straight groove 311 and the abutment rod 34, so that the translation plate 33 abuts against one of the sliding plates 35, and drives the sliding plate 35 to abut and slide in the cross bar 31. Through the sliding of the sliding plate 35, under the action of the connecting rod 36, the supporting rod 37 is driven to slide along the radial direction of the cross bar 31, so that the steel pipe is clamped by clamping the supporting rod 37 and the inner wall of the steel pipe.

[0049] Those skilled in the art will know that: by lateral movement of the sliding plate 35, the clamping assembly at one end of the cross bar 31 is selected to cooperate, driving the supporting round rods 37 at one end of the cross bar 31 to clamp the steel pipe. At this time, the elastic member 38 in the clamping assembly that is clamping is in a compressed state due to the sliding extrusion of the sliding plate 35; and the elastic member 38 in the clamping assembly at the other end is in an extended state because the sliding plate 35 is not in contact with the sliding plate 35 in the clamping assembly; that is to say: when the clamping assembly at one end of the cross bar 31 is clamping, the other clamping assembly is in an initial state.

[0050] In the embodiment of the present invention: it also includes two rotating mechanisms 4, each of which includes a worm 41 rotatably connected to the cross bar 31, a worm wheel 42 is fixedly connected to the sleeve 32, the worm 41 meshes with the worm wheel 42, a first pulley 43 is fixedly connected to the worm 41, a straight rod 44 is directly slidably abutted against the through groove and the abutment frame 52, a second pulley 45 is fixedly connected to the straight rod 44, a first belt 46 is arranged between the first pulley 43 and the second pulley 45, a ratchet 47 is fixedly connected to the straight rod 44, a first gear 48 is rotatably connected to the second pulley 45, a pawl 49 is elastically arranged on the first gear 48, and the pawl 49 is snap-fitted with the ratchet 47; specifically, a torsion spring is arranged between the pawl 49 and the first gear 48; a first rack 410 and a second rack 411 are fixedly connected to the fixed plate 53, and the first gear 48 meshes with the first rack 410 and the second rack 411 respectively.

[0051] The axis of the straight rod 44 coincides with the midpoint of the axis of the cross rod 31 .

[0052] It can be understood that: when the first gear 48 rotates along the first direction, that is, when the straight rod 44 slides along the inclined section 531, when the first gear 48 engages with the first rack 410, due to the clamping action of the pawl 49 and the ratchet wheel 47, the first gear 48 will drive the straight rod 44 to rotate synchronously, and the straight rod 44 drives the worm 41 to rotate through the first pulley 43, the second pulley 45, and the first belt 46, and the worm 41 drives the worm wheel 42 engaged with it to rotate.

[0053] It should be emphasized that the rotation of the straight rod 44 has two strokes; in the first stroke: the worm gear 42 drives the sleeve 32 to rotate, thereby driving the translation plate 33 to slide in the cross bar 31 through the cooperation of the inclined groove 321, the straight groove 311, and the abutment rod 34, so that the abutment rod 34 slides from one end of the inclined groove 321 and the straight groove 311 to the other end, and abuts with the end of the other end, that is: the clamping assembly at one end of the cross bar 31 cancels the clamping of the welded steel pipe, and the clamping assembly at the other end begins to clamp the steel pipe to be welded that rolls down from the support tube plate 61, and after the clamping assembly releases the welded steel pipe, the distance between the two clamping assemblies becomes farther and farther, so the welded steel pipe will fall due to its own gravity.

[0054] In the second stroke: As described above, as the straight rod 44 continues to slide in the horizontal section 532, the first gear 48 disengages from the first rack 410 and meshes with the second rack 411, thereby driving the straight rod 44 to continue to rotate. Since the abutment rod 34 is already located at the end positions of the inclined groove 321 and the straight groove 311 at this time, the worm wheel 42 can no longer continue to rotate, that is, the worm 41 and the worm wheel 42 are in a relatively static state, and the two do not rotate separately due to the meshing, that is, the first pulley 43 cannot drive the second pulley 45 to rotate through the first belt 46. At this time, the entire clamping mechanism 3 will rotate around the axis of the straight rod 44 as the center, so that the cross bar 31 rotates 180 degrees around the axis of the straight rod 44, that is, the currently clamped steel pipe to be welded is turned 180 degrees. After rotation, the two steel pipes to be welded move from one side of the axis of the straight rod 44 to the other side, so that the two steel pipes to be welded are close to each other, that is, located between the two clamping mechanisms 3.

[0055] When the first gear 48 rotates in the second direction, that is, the straight rod 44 slides from the horizontal section 532 to the inclined section 531, the pawl 49 and the ratchet 47 cannot be effectively engaged, that is, the straight rod 44 cannot be driven to rotate synchronously. As the straight rod 44 slides, the two clamping components gradually approach each other to connect the two steel pipes to be welded. When the two steel pipes to be welded are completely abutted, they are welded by the welding robot 2.

[0056] It can be understood that since the clamping mechanism 3 can rotate 180 degrees around the axis of the straight rod 44, only by controlling the straight rod 44 to rotate in one direction, the translation plate 33 can be controlled to slide back and forth in the cross bar 31, so that the translation plate 33 alternately abuts against the two sliding plates 35, thereby driving the two clamping components to work alternately.

[0057] In an embodiment of the present invention: a driving mechanism 5 comprises a rotating shaft 51 rotatably connected to a frame 1; a driving source for driving the rotating shaft 51 to rotate forward and reverse is fixedly connected to the frame 1, the driving source is a motor, and the output end of the motor is fixedly connected to the rotating shaft 51; the driving mechanism 5 also comprises an abutment frame 52 fixedly connected to the rotating shaft 51; specifically, the abutment frame 52 is composed of a first section 521, a second section 522 and a third section 523 connected together; two fixed plates 53 are fixedly connected to the frame 1, and through grooves are provided on the two fixed plates 53; specifically, the through grooves are composed of an inclined section 531 and a horizontal section 532 connected together.

[0058] Through the cooperation of the through slot, the abutment frame 52 and the straight rod 44 , the straight rod 44 can slide back and forth along the path of the through slot.

[0059] In the embodiment of the present invention: two feeding mechanisms 6 are symmetrically arranged on the frame 1, and each feeding mechanism 6 includes a tube support plate 61, and a feed plate 67 is rotatably connected to the tube support plate 61; specifically, the feed plate 67 has a tube blocking portion 671 and a lower tube notch 672, and the tube blocking portion 671 and the lower tube notch 672 are both in contact with a steel tube to be welded at the bottom of the tube support plate 61; the feed plate 67 is in contact with the steel tube placed on the tube support plate 61.

[0060] Specifically, the feeding mechanism 6 also includes a third pulley 62 fixedly connected to the rotating shaft 51, a fourth pulley 63 is rotatably connected to the tube support plate 61, a second belt 64 is arranged between the third pulley 62 and the fourth pulley 63, an incomplete gear 65 is fixedly connected to the fourth pulley 63, and a second gear 66 is fixedly connected to the unloading plate 67, and the incomplete gear 65 is meshed with the second gear 66.

[0061] The rotation of the rotating shaft 51 drives the second gear 66 to rotate through the transmission of the third pulley 62, the fourth pulley 63 and the second belt 64. The second gear 66 will first drive the second gear 66 to rotate, and the second gear 66 drives the blanking plate 67 to rotate synchronously. The rotation of the blanking plate 67 will cause the lowest steel pipe to be welded to roll down along the top plane of the blanking plate 67. At this time, as the blanking plate 67 rotates, the pipe blocking portion 671 will abut and support the other steel pipes to be welded thereon to prevent other welded steel pipes from rolling down.

[0062] The significance of the incomplete gear 65 is that it can intermittently drive the blanking plate 67 to rotate forward and reverse. When the incomplete gear 65 is disengaged from the second gear 66, the blanking plate 67 has rotated to the maximum angle, that is, the bottom of the blanking plate 67 is in contact with the frame 1, and the blanking plate 67 is in a stationary state. At this time, the rotating shaft 51 is still rotating, and the rotating shaft 51 drives the straight rod 44 to slide continuously in the horizontal section 532. The sliding stroke of the straight rod 44 drives the clamping mechanism 3 to approach the position of the steel pipe to be welded that has rolled down, and clamps the steel pipe to be welded. Since the blanking plate 67 remains stationary, the reverse rotation of the blanking plate 67 is avoided, thereby avoiding the clamping action of the clamping mechanism 3; when the rotating shaft 51 rotates in the reverse direction, after the incomplete gear 65 is disengaged from the second gear 66, as mentioned above, it is also to avoid interference problems.

[0063] The process of the rotating shaft 51 rotating along the first direction includes a discharge stroke, a steel pipe loading stroke and a clamping stroke;

[0064] In the unloading stroke: the two clamping mechanisms 3 move away from each other, so that the clamping components at one end of the two clamping mechanisms 3 release the clamping of the welded steel pipe, so that the welded steel pipe falls from between the two clamping components;

[0065] In the steel pipe feeding stroke: the two unloading plates 67 rotate, driving the steel pipe to be welded located at the bottom of the two tube plates 61 to roll down, and abutting against the remaining steel pipes on the two tube plates 61;

[0066] In the clamping stroke: the two clamping mechanisms 3 are separated from each other by the clamping components at one end, and the steel pipes to be welded rolled down from the two support tube plates 61 are clamped one by one, and the two clamping mechanisms 3 are rotated 180 degrees around the midpoint of the axis of the crossbar 31, so that the two steel pipes to be welded are located between the two clamping mechanisms 3;

[0067] The process of the rotating shaft 51 rotating along the second direction includes a docking stroke and a reset stroke;

[0068] In the butt joint stroke: the two clamping mechanisms 3 approach each other to butt the two clamped steel pipes to be welded;

[0069] In the reset stroke: the two blanking plates 67 are driven to rotate and reset, and the two blanking plates 67 are respectively and one by one in contact with the steel pipes to be welded which are located at the bottom of the two support tube plates 61 at this time.

[0070] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic welding system based on steel structure connection, characterized in that: include: Rack (1); A welding robot (2), which is arranged on the frame (1); Two clamping mechanisms (3) are symmetrically arranged on the frame (1) in a sliding and rotating manner, each clamping mechanism (3) comprises a cross bar (31), both ends of the cross bar (31) are provided with clamping assemblies, the clamping assemblies comprise a plurality of round support rods (37) slidably connected to the end surface of the cross bar (31), each round support rod (37) abuts against the inner wall of the steel pipe; Two feeding mechanisms (6) are symmetrically arranged on the frame (1), each feeding mechanism (6) comprises a tube support plate (61), a feed plate (67) is rotatably connected to the tube support plate (61), and the feed plate (67) is in abutment with the steel tube placed on the tube support plate (61); A driving mechanism (5), comprising a rotating shaft (51) rotatably connected to the frame (1); The process of the rotating shaft (51) rotating along the first direction includes a material unloading stroke, a steel pipe loading stroke and a clamping stroke; In the unloading stroke: the two clamping mechanisms (3) move away from each other, so that the clamping components at one end of the two clamping mechanisms (3) release the clamping of the welded steel pipe, so that the welded steel pipe falls from between the two clamping components; During the steel pipe feeding stroke: both unloading plates (67) rotate, driving the steel pipe to be welded located at the bottom of the two tube support plates (61) to roll down, and abutting against the remaining steel pipes on the two tube support plates (61); In the clamping stroke: the two clamping mechanisms (3) are separated from each other by the clamping components at one end, and respectively clamp the steel pipes to be welded that roll down from the two tube support plates (61) one by one, and the two clamping mechanisms (3) are rotated 180 degrees with the midpoint of the axis of the cross bar (31) as the center, so that the two steel pipes to be welded are located between the two clamping mechanisms (3); The process of the rotating shaft (51) rotating along the second direction includes a docking stroke and a reset stroke; In the butt jointing process: the two clamping mechanisms (3) approach each other so as to butt joint the two steel pipes to be welded; In the reset stroke: the two blanking plates (67) are driven to rotate and reset, and the two blanking plates (67) are respectively and one by one in contact with the steel pipes to be welded which are located at the bottom of the two supporting tube plates (61).

2. The automatic welding system based on steel structure connection according to claim 1 is characterized in that: A sleeve (32) is rotatably sleeved on the cross bar (31), an oblique groove (321) is provided on the sleeve (32), a straight groove (311) is provided on the cross bar (31), a translation plate (33) is slidably connected in the cross bar (31), an abutment rod (34) is fixedly connected to the translation plate (33), the abutment rod (34) is slidably abutted in the straight groove (311) and the oblique groove (321) at the same time, and the translation plate (33) is abutted and matched with clamping assemblies located at both ends of the cross bar (31).

3. The automatic welding system based on steel structure connection according to claim 2 is characterized in that: The clamping assembly comprises a sliding plate (35) slidably connected in the cross bar (31), the sliding plate (35) abuts against the translation plate (33), an elastic member (38) is arranged between the sliding plate (35) and the inner wall of the cross bar (31), a plurality of connecting rods (36) are rotatably connected to the sliding plate (35), and each connecting rod (36) is rotatably connected to each supporting round rod (37) in a one-to-one correspondence.

4. The automatic welding system based on steel structure connection according to claim 2 is characterized in that: The driving mechanism (5) also includes an abutment frame (52) fixedly connected to the rotating shaft (51); two fixing plates (53) are fixedly connected to the frame (1); and through grooves are provided on the two fixing plates (53).

5. The automatic welding system based on steel structure connection according to claim 4 is characterized in that: The abutting frame (52) is composed of a first section (521), a second section (522) and a third section (523) which are connected to each other.

6. The automatic welding system based on steel structure connection according to claim 4 is characterized in that: The through groove is composed of an inclined section (531) and a horizontal section (532) connected to each other.

7. The automatic welding system based on steel structure connection according to claim 4 is characterized in that: The invention also comprises two rotating mechanisms (4), each of which comprises a worm (41) rotatably connected to the crossbar (31), a worm wheel (42) fixedly connected to the sleeve (32), the worm (41) meshing with the worm wheel (42), a first pulley (43) fixedly connected to the worm (41), a straight rod (44) directly slidingly abutting the through groove and the abutting frame (52), a second pulley (45) fixedly connected to the straight rod (44), the first pulley (43) and the second pulley (45) being connected to each other. ), a first belt (46) is arranged between the straight rod (44), a ratchet (47) is fixedly connected to the straight rod (44), a first gear (48) is rotatably connected to the second pulley (45), a ratchet pawl (49) is elastically arranged on the first gear (48), the ratchet pawl (49) is engaged with the ratchet (47), a first rack (410) and a second rack (411) are fixedly connected to the fixing plate (53), and the first gear (48) is respectively engaged with the first rack (410) and the second rack (411).

8. The automatic welding system based on steel structure connection according to claim 1 is characterized in that: The feeding mechanism (6) also includes a third pulley (62) fixedly connected to the rotating shaft (51); a fourth pulley (63) is rotatably connected to the tube support plate (61); a second belt (64) is arranged between the third pulley (62) and the fourth pulley (63); an incomplete gear (65) is fixedly connected to the fourth pulley (63); a second gear (66) is fixedly connected to the unloading plate (67); and the incomplete gear (65) is meshed with the second gear (66).

9. The automatic welding system based on steel structure connection according to claim 1 is characterized in that: The lower material plate (67) is provided with a tube blocking portion (671) and a lower tube notch (672).

10. The automatic welding system based on steel structure connection according to claim 3, characterized in that: The elastic member (38) is a compression spring.

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