An automated welding device for overloaded steel truss girders

Abstract

The present invention belongs to the field of welding of heavy-duty steel truss girders, and discloses an automatic welding device for heavy-duty steel truss girders, including a right support device, a welding machine and a driving gear; a right support device is arranged on one side of the welding machine, the right support device includes a support plate, a fixed shell and a limit shell, and a left support device is symmetrically arranged about the vertical center line of the welding machine with respect to the right support device; a left support frame is fixedly arranged at the center of the upper end of the left support device, and a right support frame is fixedly arranged at the center of the upper end of the support plate, and the other end of the lead screw is threadedly connected with a nut seat. Chains and connecting sleeves are arranged on the inner walls of the two support devices, and the chains are arranged around the welded joint, so as to be able to weld the joint at the lower end surface of the steel truss girder segment at this part, and be able to weld the lower end surface of the welded joint without the need for the staff to change their positions, thereby strengthening the welded joint and being beneficial to reducing the damage to the welded joint caused by wind force.

Description

Technical Field

[0001] The present disclosure belongs to the field of welding of heavy-duty steel truss girders, and particularly relates to an automated welding device for heavy-duty steel truss girders. Background Art

[0002] A bridge fabricated by splicing multi-segment double-deck steel truss girder segments is a modern bridge construction technology that combines prefabrication in a factory and on-site splicing. Such a bridge structure typically consists of multiple steel truss girder segments, each of which is prefabricated in a factory and then transported to the construction site, where precise splicing techniques are used to connect the segments to form a complete bridge. This construction method features fast construction speed and easy quality control. When splicing each segment, a welding device is required to weld to improve the tightness of the connection.

[0003] When splicing steel truss girder segments over a river using slings, the middle steel truss girder segment is only subjected to the upward pulling force of the slings, and the welding gap connection with another set of steel truss girder segments on the side is not tight. This requires staff and large equipment (floating tugboats) to cooperate for fixation before welding. Since the floating tugboat is large and difficult to control, it is not convenient to finely adjust the gap between the two steel truss girder segments. At the same time, to improve the firmness of the welded joint during welding, it is necessary to weld the edges of the connection. At this time, when the staff is located on the upper end face of the steel truss girder segment, it is not convenient to weld the connection at the lower end face of the steel truss girder segment. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present disclosure is to provide an automated welding device for heavy-duty steel truss girders, which solves the problems in the prior art that due to the inconvenience of using large support equipment to finely adjust the welding connection, the welding gap at the connection is large, and due to strong wind in the air, if the other side of the welded joint is not welded quickly, the already welded side will be affected by the wind and crack.

[0005] The purpose of the present disclosure can be achieved through the following technical solutions:

[0006] An automated welding device for heavy-duty steel truss girders includes a right support device, a welding machine, and a driving gear;

[0007] A welding frame is fixed to the lower end face of the welding machine, and a right support device is arranged on one side of the welding machine. The right support device includes a support plate, a fixed shell, and a limit shell. One end of the support plate is bolt-fixed with the fixed shell, and the other end of the support plate is inserted with the limit shell. The left support device is symmetrically arranged with respect to the vertical center line of the welding machine for the right support device;

[0008] A left support frame is fixedly installed at the center of the upper end of the left support device, and a right support frame is fixedly installed at the center of the upper end of the support plate. Fixed plates are fixedly installed on the lower end surfaces of the left support frame and the right support frame. At least one fixing hole penetrates through the upper end of the fixed plate. A plurality of limiting holes penetrate through the upper ends of the left support frame and the right support frame. A lead screw penetrates through the inner sides of the plurality of limiting holes. One end of the lead screw is connected to the output end of a servo motor, and the other end of the lead screw is threadedly connected to a nut seat;

[0009] A plurality of limiting protrusions are arranged around the outer side of the nut seat. A groove adapted to the plurality of limiting protrusions is formed at the upper end of the left support frame. A bearing is fixedly installed on one side of the groove close to the welding machine;

[0010] A plurality of sprockets are fixedly installed between the right support device and the left support device. Two chains are engaged with the plurality of sprockets. A plurality of connecting sleeves are fixedly installed between the two chains. A plurality of rods are fixedly installed at one end of the nut seat close to the servo motor. Driving teeth are arranged at the upper ends of the plurality of connecting sleeves. A counterbore is formed on one side of the driving tooth close to the left support frame.

[0011] In some disclosures, at least one threaded groove is arranged at one end of the support plate close to the fixed shell. A through hole penetrates through the upper end of the fixed shell. The position of the threaded groove corresponds to the position of the through hole.

[0012] In some disclosures, the fixed plate is made of titanium alloy.

[0013] In some disclosures, at least one first protrusion is arranged on one side of the support plate close to the limiting shell. A second protrusion is fixedly installed on the inner wall of the limiting shell. Support springs are fixedly installed between the plurality of first protrusions and the second protrusions.

[0014] In some disclosures, sprocket seats are fixedly installed on one side of the fixed shell and the limiting shell close to the sprockets. A limiting ring is fixedly installed at the end of the sprocket seat. The length of the sprocket seat is the same as the thickness of the sprocket.

[0015] In some disclosures, a through hole penetrates through the upper end of the welding frame. The position of the through hole corresponds to the output end of the welding machine;

[0016] In some disclosures, a plurality of clamps are fixedly installed at the bottom of the welding frame. The welding frame is connected to the connecting sleeve through the plurality of clamps;

[0017] In some disclosures, an electric telescopic rod is fixedly installed on the upper end surface of the welding frame. The output end of the electric telescopic rod is fixedly connected to the side wall of the welding machine.

[0018] In some disclosures, a rotating ring is coaxially arranged inside the driving gear.

[0019] In some disclosures, the position of the counterbore is adapted to a plurality of the rods.

[0020] The explanations of the nouns, conjunctions or adjectives involved in the above technical solutions are as follows:

[0021] Fixed connection means that after the parts or components are fixed, there is no relative movement between them;

[0022] Rotating connection means that the connection between parts allows the parts to rotate relative to each other;

[0023] Threaded connection is a detachable fixed connection, which has the advantages of simple structure, reliable connection, convenient installation and disassembly, etc., and is widely used in the fields of mechanical engineering and connection structures;

[0024] Sliding connection means that the connection between parts allows the parts to slide relative to each other.

[0025] Advantages of the present disclosure:

[0026] 1. The right support device and the left support device are respectively fixed on two heavy-duty steel trusses. Through the cooperation of the lead screw and the nut seat, the two sets of support devices can move closer to each other, applying an inward force to the connection part of the two steel truss segments, thereby improving the tightness of the connection part;

[0027] 2. Chains and connecting sleeves are arranged on the inner walls of the two support devices, and the chains are arranged around the welded connection part, so that the connection part of the lower end surface of the steel truss segment at this part can be welded. The lower end surface of the welded part can be welded without changing the position of the staff, thereby strengthening the welded part and being beneficial to reducing the damage of wind force to the welded part. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 is the overall structure schematic diagram of the embodiment of the present disclosure;

[0030] Figure 2 is the overall structure schematic diagram of another perspective of the embodiment of the present disclosure;

[0031] Figure 3 is the exploded structure schematic diagram of the right support device of the embodiment of the present disclosure;

[0032] Figure 4 is a schematic diagram of the overall structure of the left support device according to an embodiment of the present disclosure;

[0033] Figure 5 is a schematic diagram of the overall structure of the left support frame according to an embodiment of the present disclosure;

[0034] Figure 6 is a schematic diagram of the internal structure of the left support frame according to an embodiment of the present disclosure;

[0035] Figure 7 is a schematic diagram of the overall structure of the driving gear according to an embodiment of the present disclosure;

[0036] Figure 8 is a schematic diagram of the connection structure with the heavy-duty steel truss girder according to an embodiment of the present disclosure.

[0037] In the figure: 1, right support device; 101, support plate; 1001, threaded groove; 1002, first protrusion; 2, fixed shell; 21, through hole; 3, limit shell; 31, second protrusion; 4, support spring; 5, right support frame; 51, left support frame; 52, limit hole; 511, groove; 512, bearing; 6, fixing plate; 61, fixing hole; 7, sprocket seat; 71, limit ring; 8, sprocket; 9, chain; 10, connecting sleeve; 11, left support device; 12, welding frame; 121, welding machine; 122, electric telescopic rod; 123, perforation; 124, clamp; 13, servo motor; 131, lead screw; 14, nut seat; 141, limit protrusion; 142, rod; 15, driving gear; 151, counterbore; 152, rotating ring. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0039] According to the concept of the present application, a heavy-duty steel truss girder automatic welding device is described herein in conjunction with Figures 1 to 8 Specifically, the heavy-duty steel truss girder automatic welding device is configured as a split structure, and it has three components: a right support device 1, a welding machine 121, and a driving gear 15. Chains 9 and connecting sleeves 10 are arranged on the inner walls of the two support devices, and the chain 9 is arranged around the welded joint, so that the welded joint at the lower end surface of the steel truss girder segment at this part can be welded, and the lower end surface of the welded joint can be welded without the staff changing positions, thereby strengthening the welded joint and being beneficial to reducing the damage of wind force to the welded joint.

[0040] Please refer to Figures 1 to 8 , an automated welding device for overloaded steel truss girders, comprising: a right support device 1, a welding machine 121 and a driving gear 15;

[0041] A welding frame 12 is fixed to the lower end surface of the welding machine 121, and a right support device 1 is arranged on one side of the welding machine 121. The right support device 1 includes a support plate 101, a fixed shell 2 and a limit shell 3. One end of the support plate 101 is bolt-fixed with the fixed shell 2, and the other end of the support plate 101 is inserted with the limit shell 3. The left support device 11 is symmetrically arranged about the vertical center line of the welding machine 121 with respect to the right support device 1;

[0042] A left support frame 51 is fixed at the center of the upper end of the left support device 11, and a right support frame 5 is fixed at the center of the upper end of the support plate 101. Fixing plates 6 are fixed to the lower end surfaces of the left support frame 51 and the right support frame 5, and at least one fixing hole 61 is provided through the upper end of the fixing plate 6. A plurality of limit holes 52 are provided through the upper ends of the left support frame 51 and the right support frame 5. A lead screw 131 is provided through the inner sides of the plurality of limit holes 52, and one end of the lead screw 131 is connected to the output end of the servo motor 13, and the other end of the lead screw 131 is threadedly connected with a nut seat 14;

[0043] A plurality of limit protrusions 141 are arranged around the outer side of the nut seat 14, and a groove 511 adapted to the plurality of limit protrusions 141 is provided at the upper end of the left support frame 51, and a bearing 512 is fixed to one side of the groove 511 close to the welding machine 121;

[0044] A plurality of sprockets 8 are fixed between the right support device 1 and the left support device 11, and two chains 9 are engaged with the plurality of sprockets 8. A plurality of connecting sleeves 10 are fixed between the two chains 9. A plurality of rods 142 are fixed to one end of the nut seat 14 close to the servo motor 13, and a driving gear 15 is arranged at the upper end of the plurality of connecting sleeves 10, and a counterbore 151 is provided on one side of the driving gear 15 close to the left support frame 51.

[0045] During use, the heavy-duty steel truss girder segments on the side close to the shore are first lifted to a suitable position. Subsequently, the left support device 11 and the right support device 1 are installed on the heavy-duty steel truss girder segments, and the edges of the heavy-duty steel truss girder segments are inserted between multiple support plates 101. Then, another group of heavy-duty steel truss girder segments is lifted to a suitable position. First, the right support device 1 is fixed to the heavy-duty steel truss girder segment by bolts passing through the fixing holes 61 and tightened. At this time, the edge of the support plate 1 is parallel to the welding edge of the heavy-duty steel truss girder segment. At this time, the staff installs the left support frame 51 on another heavy-duty steel truss girder segment in the same way by bolts. Then, the lead screw 131 passes through the limit holes 52 on the two support frames, and a nut seat 14 is threadedly connected to the end of the lead screw 131 away from the servo motor 13. When the servo motor 13 drives the lead screw 131 to rotate, it drives the nut seat 14 to move linearly along the lead screw 131 towards the servo motor 13 until the side wall of the nut seat 14 fits against the side wall of the left support frame 51, and drives the left support frame 51 to approach the right support frame 5, enabling the two heavy-duty steel truss girder segments to be welded to approach each other, thereby finely adjusting the welding joint of the two steel truss girder segments, which is beneficial to improving the tightness of the connection. When the two steel truss girder segments are closely fitted, at this time, the nut seat 14 cannot continue to move linearly, and the continued rotation of the lead screw 131 increases the pressure exerted by the nut seat 14 on the left support frame 51, causing sliding friction on the side where the nut seat 14 and the left support frame 51 are in contact with each other until the limit protrusion 141 on the outer wall of the nut seat 14 is embedded in the groove 511 inside the left support frame 51, and the outer wall of the nut seat 14 is inserted onto the bearing 512 on the limit hole 52. At the same time, the rod 142 on the nut seat 14 is inserted into the counterbore 151 on the driving tooth 15. When the left support device 1 approaches the right support device 11, since multiple connecting sleeves 10 are fixed between the two chains 9, and the connecting sleeves 10 will contract inward, the stability of the two chains 9 is improved through the multiple connecting sleeves 10, and it can guide the two heavy-duty steel truss girder segments to approach linearly, which is beneficial to further restricting the movement path of the heavy-duty steel truss girder segments;

[0046] Subsequently, the continuous rotation of the servo motor 13 drives the lead screw nut seat 14 and the drive gear 15 to rotate. The teeth of the drive gear 15 are inserted into the gaps between two adjacent connecting sleeves 10. Since both ends of the connecting sleeve 10 are fixedly connected to two chains 9 respectively, when the drive gear 15 rotates, it can drive the chains 9 and the sprockets 8 to rotate, and drive the welding frame 12 and the welding machine 121 along the moving track of the chains 9, so as to weld the joints at the lower end surfaces of the steel truss girder segments. Compared with the method of workers welding the upper and lower end surfaces of the welding joints separately, when welding a single side of a heavy-duty steel truss girder segment alone, when the heavy-duty steel truss girder segment is lifted to a high altitude by the sling, due to the strong wind at high altitude, the connection between the two heavy-duty steel truss girder segments is unstable, and it is easy for cracks to occur at the original welded joint before welding the other end surface of the welded joint, resulting in the situation that the two heavy-duty steel truss girder segments are not firmly welded.

[0047] At least one threaded groove 1001 is provided at one end of the support plate 101 close to the fixed shell 2, and a through hole 21 is provided through the upper end of the fixed shell 2, and the position of the threaded groove 1001 corresponds to the position of the through hole 21. After the welding is completed, the two heavy-duty steel trusses are welded into a whole. At this time, the left support device 11 and the right support device 1 cannot be taken out along the gap between them. In response to this situation, a link on the chain 9 needs to be removed first, the chain 9 is recovered first, and then the bolt is unscrewed, and the fixed shell 2 is pulled out from one end of the support plate 101 to create a notch at one end of the right support device 1. Then, only need to pull out the right support device 101 along the notch, so as to remove the whole automatic welding device for heavy-duty steel trusses from the heavy-duty steel trusses. The connection between the fixed shell 2 and the support plate 101 is a detachable structure, which is convenient for removing the device after welding.

[0048] The fixing plate 6 is made of titanium alloy material. Titanium alloy material has the characteristics of high strength, good corrosion resistance and high heat resistance. Due to the large volume and weight of the heavy-duty steel truss girder, when adjusting the two heavy-duty steel truss girders, the high-strength characteristic of the fixing plate 6 is beneficial to reducing the situation of rigid deformation of the fixing plate 6. And because the fixing plate 6 is located on both sides of the welding machine 121, sparks will splash around during the welding process. The fixing plate 6 made of titanium alloy has high heat resistance, which can further improve the service life of the fixing plate 6.

[0049] On one side of the support plate 101 close to the limit housing 3, there is at least one first protrusion 1002, and a second protrusion 31 is fixed to the inner wall of the limit housing 3. A support spring 4 is fixed between multiple first protrusions 1002 and second protrusions 31. The limit housing 3 is U-shaped, so that its U-shaped recess can be stuck on the edge of the heavy-duty steel truss beam and can support the bottom support plate 101. At the same time, the limit housing 3 is slidably installed on the outer wall of the support plate 101. The position of the limit housing 3 is restricted by multiple support springs 4. When the right support device 1 and the left support device 11 are stuck on the outside of the heavy-duty steel truss beam, the elastic force of the support spring 4 can promote the limit housing 3 to fit against the side wall of the heavy-duty steel truss beam, which is beneficial to improving the tightness of the connection between the right support device 1 and the left support device 11 and the heavy-duty steel truss beam, and improving the stability of the device. At the same time, the distance between the limit housing 3 and the fixed housing 2 can be adjusted through the deformation of the support spring 4, which is beneficial to the adaptability of the device.

[0050] A sprocket seat 7 is fixed to the sides of the fixed housing 2 and the limit housing 3 close to the sprocket 8. A limit ring 71 is fixed to the end of the sprocket seat 7. The length of the sprocket seat 7 is the same as the thickness of the sprocket 8. The position of the sprocket 8 is restricted by the limit ring 71, that is, it can prevent the sprocket 8 from detaching from the sprocket seat 7. Also, because the length of the sprocket seat 7 is the same as the thickness of the sprocket 8, it can prevent the sprocket 8 from axially sliding during rotation, which is beneficial to improving the stability of the rotation of the sprocket 8. And the length of the sprocket seat 7 is short, so that when the output end of the welding machine 121 passes between the two sprockets 8, it can prevent the sprocket seat 7 from interfering with the movement of the welding machine 121.

[0051] A through hole 123 is provided through the upper end of the welding frame 12, and the position of the through hole 123 corresponds to the output end of the welding machine 121. A plurality of clamps 124 are fixed to the bottom of the welding frame 12, and the welding frame 12 is connected to the connecting sleeve 10 through the plurality of clamps 124. An electric telescopic rod 122 is fixed to the upper end surface of the welding frame 12, and the output end of the electric telescopic rod 122 is fixedly connected to the side wall of the welding machine 121.

[0052] The welding frame 12 is fixed to the outside of the connecting sleeve 10 through the clamps 124, which is convenient for disassembly. And the position of the welding frame 12 can be restricted by fixing with the plurality of clamps 124, and it can prevent the welding frame 12 from rotating along a single connecting sleeve 10 when the welding frame 12 rotates to the lower end surface of the heavy-duty steel truss beam, which is beneficial to improving the stability between the connecting sleeve 10 and the welding frame 12. And because the connecting sleeve 10 moves synchronously with the chain 9, it can prevent the welding frame 12 from interfering with the connecting sleeve 10 during the movement of the welding frame 12.

[0053] When installing the welding machine 121, fix the side wall of the welding machine 121 on the electric telescopic rod 122. At this time, the output end of the welding machine 121 corresponds to the position of the perforation 123. When welding, drive the welding machine 121 to move up and down through the electric telescopic rod 122, so that the output end of the welding machine 121 approaches the working position during welding. At the same time, since both ends of the chain 9 are semi-circular and the side wall of the heavy-duty steel truss beam is straight, when the welding machine 121 moves to the edge of the heavy-duty steel truss beam, the distance between the output end of the welding machine 121 and the welding surface increases, resulting in an increase in the length of the welding arc when welding the side of the heavy-duty steel truss beam, uneven heat distribution, insufficient penetration of the weld seam, and the formation of incomplete penetration. By driving the output end of the welding machine 121 to approach the welding surface through the electric telescopic rod 122, the output end of the welding machine 121 can be evenly in contact with the welding part, which is beneficial to improving the uniformity of welding of the entire joint.

[0054] A rotating ring 152 is coaxially arranged inside the driving gear 15. The rotating ring 152 is similar to a roller bearing. The inner wall of the rotating ring 152 is fixedly connected to the lead screw 131, and the outer wall of the rotating ring 152 is connected to the inner wall of the driving gear 15. When the lead screw 131 rotates, the rotational force of the lead screw 131 drives the inner wall of the rotating ring 152 to rotate. When the inner wall of the rotating ring 152 rotates, the circumferential force during the rotation of the lead screw 131 will be consumed, so that before the rod 142 is inserted into the counterbore 151, the lead screw 131 rotates while the driving gear 15 does not rotate, so that the connecting sleeve 10 will not be prematurely shifted to make the welding machine 121 move forward during the fine adjustment process. The position of the counterbore 151 is adapted to a plurality of rods 142. Since the position of the driving gear 15 does not change during the fine adjustment process, when the limit protrusion 141 on the nut seat 14 is embedded in the groove 511, the position of the rod 142 corresponds to the position of the counterbore 151 and is inserted into the counterbore 151. At this time, the lead screw 131 continues to rotate, and the driving gear 15 is driven to rotate through the nut seat 14 by the rod 142.

[0055] The following further describes a heavy-duty steel truss beam automatic welding device provided by the present invention in conjunction with the drawings and embodiments.

[0056] During use, the heavy-duty steel truss girder segments on the side close to the shore are first lifted to a suitable position. Subsequently, the left support device 11 and the right support device 1 are sleeved on the outer wall of the heavy-duty steel truss girder segments through the gap between the two heavy-duty steel truss girder segments. Then, the right support device 1 is fixed to the heavy-duty steel truss girder segments by bolts passing through the fixing holes 61 and tightened. Then, the limiting shell 3 is dragged outwards. By adjusting the stretching of the support spring 4, the inner walls of the limiting shell 3 and the fixing shell 2 are made to fit the edges of the heavy-duty steel truss girder segments. At this time, the staff installs the left support frame 51 on another heavy-duty steel truss girder segment in the same way. Then, the lead screw 131 is passed through the limiting holes 52 on the right support frame 5 and the left support frame 51, and the nut seat 14 is tightened at the end of the lead screw 131;

[0057] Then, the servo motor 13 is started. The servo motor 13 drives the lead screw 131 to rotate, and drives the nut seat 14 to move linearly along the lead screw 131 towards the direction of the servo motor 13 until the side wall of the nut seat 14 fits the side wall of the left support frame 51, and drives the left support frame 51 to approach the right support frame 5, enabling the two heavy-duty steel truss girder segments to be welded to approach each other, thereby finely adjusting the welding joint of the two steel truss girder segments. When the two steel truss girder segments are closely fitted, at this time, the nut seat 14 cannot continue to move linearly, and the continuous rotation of the lead screw 131 increases the pressure exerted on the left support frame 51 by the nut seat 14, causing sliding friction on the side where the nut seat 14 and the left support frame 51 are in contact with each other until the limiting protrusion 141 on the outer wall of the nut seat 14 is embedded in the groove 511 inside the left support frame 51, and the outer wall of the nut seat 14 is inserted into the bearing 512 on the limiting hole 52. At the same time, the rod 142 on the nut seat 14 is inserted into the counterbore 151 on the driving tooth 15. At this time, the continuous rotation of the lead screw 131 can drive the teeth on the driving tooth 15 and the connecting sleeve 10 to be inserted alternately, thereby driving the connecting sleeve 10 and the chain 9 to rotate, and driving the welding machine 121 to move along the path of the chain 9, thereby welding the lower end surface of the welding surface;

[0058] When the welding is completed, one link of the chain 9 needs to be removed. First, the chain 9 is recycled, then the bolts are unscrewed, and the fixing shell 2 is pulled out from one end of the support plate 101, creating a notch on one side of the right support device 1, thereby facilitating the recycling of the device.

[0059] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0060] The foregoing has shown and described the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure will have various changes and improvements, and these changes and improvements fall within the scope of the present disclosure claimed.

Claims

1. A heavy-duty steel truss automated welding device, characterized in that: include: A right supporting device (1), a welding machine (121) and a driving gear (15); A welding frame (12) is fixed to the lower end surface of the welding machine (121), and a right supporting device (1) is arranged on one side of the welding machine (121), the right supporting device (1) comprising a supporting plate (101), a fixing shell (2) and a limiting shell (3), and the fixing shell (2) is bolted to one end of the supporting plate (101), and the limiting shell (3) is inserted into the other end of the supporting plate (101), and the left supporting device (11) is symmetrically arranged on the right supporting device (1) with respect to the vertical center line of the welding machine (121); A left support frame (51) is fixed at the center of the upper end of the left support device (11), and a right support frame (5) is fixed at the center of the upper end of the support plate (101), a fixing plate (6) is fixed to the lower end surfaces of the left support frame (51) and the right support frame (5), and at least one fixing hole (61) is penetrated through the upper end of the fixing plate (6), a plurality of limiting holes (52) are penetrated through the upper ends of the left support frame (51) and the right support frame (5), a screw rod (131) is penetrated through the inner side of the plurality of limiting holes (52), one end of the screw rod (131) is connected to the output end of the servo motor (13), and the other end of the screw rod (131) is threadedly connected to a nut seat (14); A plurality of limiting protrusions (141) are arranged around the outer side of the nut seat (14), and a groove (511) adapted to the plurality of limiting protrusions (141) is provided at the upper end of the left support frame (51), and a bearing (512) is fixed on a side of the groove (511) close to the welding machine (121); A plurality of sprockets (8) are fixed between the right support device (1) and the left support device (11), and two chains (9) are meshed with the plurality of sprockets (8), and a plurality of connecting sleeves (10) are fixed between the two chains (9); a plurality of rods (142) are fixed to one end of the nut seat (14) close to the servo motor (13), and a driving tooth (15) is provided at the upper end of the plurality of connecting sleeves (10), and a countersunk hole (151) is provided on one side of the driving tooth (15) close to the left support frame (51); At least one thread groove (1001) is provided at one end of the support plate (101) close to the fixing shell (2), and a through hole (21) is provided through the upper end of the fixing shell (2), and the position of the thread groove (1001) corresponds to the position of the through hole (21); At least one first protrusion (1002) is provided on a side of the support plate (101) close to the limiting shell (3), a second protrusion (31) is fixed to the inner wall of the limiting shell (3), and support springs (4) are fixed between a plurality of the first protrusions (1002) and the second protrusions (31).

2. The heavy-duty steel truss automatic welding device according to claim 1 is characterized in that: The fixing plate (6) is made of titanium alloy.

3. The heavy-duty steel truss automatic welding device according to claim 1 is characterized in that: A sprocket seat (7) is fixed to one side of the fixed shell (2) and the limiting shell (3) close to the sprocket (8), a limiting ring (71) is fixed to the end of the sprocket seat (7), and the length of the sprocket seat (7) is the same as the thickness of the sprocket (8).

4. The heavy-duty steel truss automatic welding device according to claim 1 is characterized in that: A through hole (123) is provided through the upper end of the welding frame (12), and the position of the through hole (123) corresponds to the output end of the welding machine (121).

5. The heavy-duty steel truss automatic welding device according to claim 4 is characterized in that: A plurality of clamps (124) are fixed to the bottom of the welding frame (12), and the welding frame (12) is connected to the connecting sleeve (10) via the plurality of clamps (124).

6. The heavy-duty steel truss automatic welding device according to claim 5, characterized in that: An electric telescopic rod (122) is fixed to the upper end surface of the welding frame (12), and the output end of the electric telescopic rod (122) is fixedly connected to the side wall of the welding machine (121).

7. The heavy-duty steel truss automatic welding device according to claim 1, characterized in that: A rotating ring (152) is coaxially arranged on the inner side of the driving tooth (15).

8. The heavy-duty steel truss automatic welding device according to claim 7, characterized in that: The position of the countersunk hole (151) is adapted to the plurality of rods (142).

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