Automatic welding equipment for steel bar truss

Abstract

The invention belongs to the technical field of welding assistance, and discloses automatic steel bar truss welding equipment which comprises induction heating equipment. Through cooperation of structures such as the torsion device and the induction heating equipment, the coil preheats the rectangular steel pipe, stress caused by torsion is eliminated essentially based on a deep mechanism of material science and thermodynamics, even if heating is stopped, the stress does not appear again and a welding seam is broken, the torsion device is controlled to be fixed through the limiting stopper, and the welding seam is prevented from being damaged. The sleeve in the horizontal direction is rotated to push the threaded rod to stretch, the rectangular steel pipe is twisted on the horizontal plane, the twisting device with the extended lower end is operated to enable the threaded rod to stretch in the sleeve, the corresponding limiting stopper is operated to be in a movable state, the nut at the upper end is rotated, the sleeve pushes the threaded rod to stretch, and the rectangular steel pipe is twisted in the vertical direction. And the end part of the rectangular steel pipe can be twisted to different positions, so that the butt joint precision of the welding seam is improved, and the condition that the welding seam is cracked subsequently is more difficult to occur.

Description

Technical Field

[0001] This invention belongs to the field of welding auxiliary technology, specifically an automated welding equipment for steel trusses. Background Technology

[0002] A steel truss is a spatial truss structure formed by welding or mechanically connecting the upper and lower chord steel bars and web steel bars. It is generally used as a reinforcing skeleton for concrete floor slabs and walls. The main body uses rectangular or circular steel pipes. If the truss needs to be fabricated in sections due to transportation restrictions, or if the truss is partially deformed or broken, or if there are non-standard shapes for the connection, welding is required to complete the connection during on-site installation. However, it should be noted that this situation does not only require welding one place, but also welding multiple steel bars. However, since there is no suitable equipment on the construction site to connect two steel pipes, the initial welding may not be able to be aligned well. Due to the limitations of other welding points, it is very likely that the welds will not be aligned when welding the last or more places, thus requiring manual correction.

[0003] In existing straightening techniques, a metal pry bar is usually inserted into the steel pipe and twisted, or a pipe wrench is used to clamp the steel pipe and twist it. The manual twisting angle is generally limited to the axial direction, making it difficult to bend at more angles. However, regardless of the welding method, it requires a lot of labor and usually cannot be perfectly aligned with the other steel pipe being welded. During the process, due to the presence of stress, it is necessary to manually maintain the angle of the twisted steel pipe. Stress still exists after welding, which increases the force borne by the weld and makes it very likely that the weld will crack later. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides an automated welding equipment for steel trusses, which solves the problem that it is difficult for manual labor to fully twist steel bars at multiple angles, and that the stress after twisting the steel bars cannot be effectively released, weakened or eliminated, leading to subsequent cracking of the weld.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automated welding equipment for steel trusses, comprising an induction heating device, wherein a torsion device is connected to each side of the induction heating device by a symmetrically designed limiter, and a docking device is installed at the end of each torsion device, wherein a torsion rod is rotatably mounted on the top of one of the docking devices, and a third torsion device is hinged to the end of the torsion rod, and the third torsion device is hinged to the top of the other docking device by a detachable bolt;

[0006] The connector can be fixed to a rectangular steel pipe;

[0007] The induction heating device includes a housing and a coil, with the coil sleeved around the outer periphery of a rectangular steel tube.

[0008] The torsion device includes a sleeve hinged to a limiter, a threaded rod being movably engaged inside the sleeve, a set of limit blocks being circumferentially engaged inside the sleeve, each of the limit blocks extending to the outside of the sleeve and connected in series by a snap ring, a nut being slidably engaged on the outer periphery of the sleeve, and a guide cylinder being welded to the side of the nut, the guide cylinder pressing the limit block and threadedly connecting it to the threaded rod.

[0009] The limiter can restrict the rotation of the torsion device or keep it in a fixed state.

[0010] Preferably, the limiter includes a gear rotatably mounted on the outside of the induction heating device, the gear being welded to the hinge point at the end of the sleeve, a toothed plate being movably engaged on the outside of the housing, the toothed plate extending to the outside of the housing and having a handle installed thereon, and the toothed plate meshing with the gear.

[0011] Preferably, a set of mutually attracting magnets are symmetrically installed on the side of the toothed plate and on the housing, and the two magnets in each set are located on the same axis and can attract each other.

[0012] Preferably, both of the limiters lock the corresponding torsion devices, and the nut in the third torsion device slides so that the corresponding guide cylinder no longer presses against the limit block at its bottom, the limit block guide thread rod is no longer threadedly connected to the sleeve, and the thread rod can freely extend and retract inside the sleeve.

[0013] By turning the nut in the torsion device connected to any limiter with an adjustable wrench or a wrench of the corresponding size, the threaded rod rotates simultaneously and drives the corresponding sleeve to rotate outward and push the docking device and the rectangular steel pipe, which is then twisted in the horizontal direction.

[0014] Preferably, one of the limiters and two torsioners are locked, and the other limiter can support the rotation of the nut in the third torsioner when the corresponding torsioner rotates, so that the threaded rod rotates and pushes the sleeve to extend outward, and the end of the rectangular steel tube can be pushed to twist in the vertical direction.

[0015] Preferably, the induction heating device further includes a handle fixed to the top of the housing, the handle being made of a flexible material, and a nylon strap symmetrically installed on both sides of the housing, one end of the nylon strap being riveted to the housing and the other end being snapped into the housing.

[0016] Preferably, the docking device includes a set of cover plates arranged circumferentially and closely attached to the perimeter of the rectangular steel pipe. Each cover plate is symmetrically equipped with two sets of guide grooves. Each guide groove contains a metal rod that is movably engaged. Every two metal rods that are perpendicular to each other are hinged together.

[0017] Each of the two longitudinally symmetrical metal rods on the cover plate is movably fitted with a guide plate, and the two guide plates are connected by a spring telescopic rod.

[0018] Preferably, one of the guide plates and the spring telescopic rod are regarded as a set of triggers, and each set of triggers is arranged in a circumferential direction at equal angles. The guide groove consists of a vertical groove and a set of transverse grooves perpendicular to it.

[0019] Preferably, a guide rod is movably engaged inside a set of guide grooves on the top cover plate, and a set of metal sleeves is hinged to the two outer metal rods, with the guide rods engaging with the metal sleeves.

[0020] Preferably, each of the cover plates is rotatably connected to each of the symmetrically arranged sleeves, the torsion rod is rotatably connected to the top cover plate of one of the docking devices, and the threaded rod in the third torsion device is hinged to the top cover plate of the other docking device. The hinged part is composed of detachable bolts, and the hinge point is rotatably mounted on the cover plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This invention utilizes a combination of a torsion device and an induction heating device. A coil preheats the rectangular steel tube, fundamentally eliminating the stress caused by torsion based on deep mechanisms of materials science and thermodynamics. Even after heating stops, the stress will not reappear and damage the weld. The torsion device is fixed by a limiter. Rotating the horizontal sleeve pushes the threaded rod to extend, causing the rectangular steel tube to twist in the horizontal plane. After the lower end extends, the torsion device operates with the threaded rod extending and retracting within the sleeve, corresponding to the limiter being in an active state. Rotating the upper nut pushes the sleeve to extend the threaded rod, causing the rectangular steel tube to twist vertically. During this process, the end of the rectangular steel tube can be twisted to different positions, improving the accuracy of the weld joint and making the weld less prone to subsequent breakage.

[0023] This invention, through the cooperation of structures such as a torsion device and an induction heating device, removes the bolts on the threaded rod. The upper torsion device is only hinged to the torsion rod. After the connector is removed from the rectangular steel tube, it can be folded up, and the torsion rod is placed against the top of the induction heating device. At this time, the torsion devices and torsion rods can be bound to the induction heating device by nylon straps, thereby preventing it from shaking. The folded device can save storage space, making it easier for staff to carry or take it.

[0024] This invention, through the cooperation of structures such as a docking device, uses a pinching guide plate to drive the corresponding metal rods out of the transverse groove, allowing them to move in the vertical groove. The metal rods can slide freely and detach from the rectangular steel pipe. By adjusting the positions of each metal rod in the transverse groove through a trigger, the cover plate is attached to and fixed to rectangular steel pipes of different sizes. The cover plate can fit around the rectangular steel pipe, so regardless of whether the torsion device pushes or pulls the rectangular steel pipe, it can perform torsion work. The sliding guide rod is moved out of the transverse groove in the guide groove and moves in the vertical groove. At this time, the guide rod can slide freely and detach from the metal sleeve rod. The docking device can then directly detach from the rectangular steel pipe without exiting through the weld, avoiding the problem of the docking device being unable to detach from the rectangular steel pipe due to an excessively narrow joint. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the sleeve of the present invention;

[0027] Figure 3 This is a schematic diagram showing the disassembled structure of the torsion device of the present invention;

[0028] Figure 4 This is a cross-sectional schematic diagram of the connection between the housing and the sleeve of the present invention via a limiter;

[0029] Figure 5 This is a schematic diagram showing the fit between the housing and the limiter structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the fit between the upper torsion device and the docking device of the present invention;

[0031] Figure 7 This is a schematic diagram showing the mating of the connector of the present invention with the rectangular steel pipe structure;

[0032] Figure 8 This is a schematic diagram showing the disassembled structure of the docking device of the present invention;

[0033] Figure 9 This is a schematic diagram of the second working state of the present invention;

[0034] Figure 10 This is a schematic diagram of the path through which the rectangular steel pipe of the present invention is twisted by the torsion device;

[0035] Figure 11 This is a schematic diagram of the third working state of the present invention.

[0036] In the diagram: 1. Induction heating equipment; 11. Box; 12. Coil; 13. Handle; 14. Nylon belt; 2. Limiter; 21. Gear; 22. Toothed plate; 23. Handle; 3. Torque generator; 31. Sleeve; 32. Threaded rod; 33. Limiting block; 34. Snap ring; 35. Nut; 36. Guide cylinder; 4. Connector; 41. Cover plate; 42. Guide groove; 43. Metal rod; 44. Guide plate; 45. Spring telescopic rod; 5. Torque rod; 6. Rectangular steel pipe; 7. Guide rod; 8. Circular steel pipe. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 11 As shown, the present invention provides an automated welding equipment for steel trusses, including an induction heating device 1. A torsion device 3 is connected to each of the two sides of the induction heating device 1 by a symmetrically designed limiter 2. A docking device 4 is installed at the end of each torsion device 3. A torsion rod 5 is rotatably installed on the top of one of the docking devices 4. A third torsion device 3 is hinged to the end of the torsion rod 5. The third torsion device 3 is hinged to the top of the other docking device 4 by a detachable bolt.

[0039] The connector 4 can be fixed to the rectangular steel pipe 6;

[0040] Induction heating device 1 includes a housing 11 and a coil 12, with the coil 12 sleeved around the outer periphery of a rectangular steel tube 6;

[0041] The torsion device 3 includes a sleeve 31 hinged to the limiter 2. A threaded rod 32 is movably engaged inside the sleeve 31. A set of limit blocks 33 are circumferentially engaged inside the sleeve 31. Each limit block 33 extends to the outside of the sleeve 31 and is connected in series by a snap ring 34. A nut 35 is slidably engaged on the outer periphery of the sleeve 31. A guide cylinder 36 is welded to the side of the nut 35. The guide cylinder 36 presses the limit block 33 and the threaded rod 32 into a threaded connection.

[0042] The limiter 2 can restrict the rotation of the torsion device 3 or keep it in a fixed state.

[0043] Using the above scheme: the coil 12 is sleeved on the rectangular steel pipe 6, and then the connector 4 is fixed on the rectangular steel pipe 6. At this time, the device and the rectangular steel pipe 6 are in a fixed state.

[0044] Before the torsion work begins, turn on the induction heating device 1 so that the coil 12 can preheat the rectangular steel pipe 6;

[0045] Based on the deep mechanisms of materials science and thermodynamics, when a metal is heated to the recrystallization temperature, which is usually 0.4 to 0.5 times the melting point of the heated metal, the atomic mobility is enhanced. At this time, the atoms in the lattice distortion region, that is, the high stress region, rearrange through diffusion, which can eliminate or greatly reduce the local elastic strain of the metal.

[0046] During torsion, dislocation slip and climb will reorganize the defects inside the grain, reduce the stored energy, and reset the original stress field by the new phase structure, thereby essentially eliminating the stress caused by torsion. Even if heating is stopped, the stress will not reappear and break the weld, greatly improving the stability and quality of the weld.

[0047] Since the induction heating device 1 uses a frequency converter to convert the power frequency electricity into the required frequency and generate an alternating magnetic field through a coil, causing eddy currents inside the workpiece to heat up, the induction heating device 1 does not directly apply heat, but instead applies energy directly to the inside of the workpiece through electromagnetic induction, which greatly improves the thermal efficiency and thus increases the heating speed of the rectangular steel pipe 6, further improving the working efficiency of the device.

[0048] After preheating, if the corresponding torsion device 3 is fixed by the limiter 2, the two symmetrical torsion devices 3 can only be folded in the horizontal direction. At this time, the nut 35 in the upper torsion device 3 is slidable so that the guide tube 36 no longer presses the limit block 33. The snap ring 34 will pull the limit block 33 to extend outward and not be threadedly connected to the sleeve 31. The upper threaded rod 32 can freely extend and retract inside the sleeve 31.

[0049] At this time, operate the torsion device 3 on the side of the dock 4 that is connected to the upper torsion device 3;

[0050] When the nut 35 in the rotating torsion device 3 is rotated, the nut 35 is slidably engaged with the sleeve 31, and the end of the threaded rod 32 is hinged to the rectangular steel pipe 6. Therefore, the sleeve 31 will also rotate synchronously and push the threaded rod 32 to extend outward, thereby pushing the end of the rectangular steel pipe 6 to twist on the horizontal plane.

[0051] During the horizontal torsion of the rectangular steel pipe 6, the torsion bar 5 and the torsion device 3 on it will inevitably rotate synchronously, and the length of the torsion device 3 will increase. Since the sleeve 31 and the threaded rod 32 were previously operated to be freely telescopic, the torsion in this direction will not be restricted and the torsion force will not increase.

[0052] Next, the lower and extended torsion device 3 is operated according to the above operation procedure so that the threaded rod 32 can extend and retract inside the sleeve 31, and the corresponding limiter 2 is operated to be in an active state. The upper torsion device 3 is operated so that the sleeve 31 is threadedly connected to the limit block 33. At this time, the nut 35 in the upper torsion device 3 is rotated so that the sleeve 31 can push the threaded rod 32 to extend. At this time, the end of the rectangular steel pipe 6 can be twisted in the vertical direction.

[0053] First, the end of the rectangular steel pipe 6 is twisted horizontally or vertically, and then twisted in the other direction. This allows the end of the rectangular steel pipe 6 to be twisted to different positions, enabling multi-angle and precise welding. This significantly improves the accuracy of the weld joint and makes the weld less prone to subsequent breakage. Figure 10 The torsion path of the rectangular steel pipe 6 (shown as a dashed line), the direction of movement of the ends of each torsioner 3, and the position of the rectangular steel pipe 6 after torsion are all clearly visible in the figure.

[0054] During this process, the rectangular steel pipe 6 can be twisted with just one wrench. Before twisting, the bent part of the rectangular steel pipe 6 has been heated, so the stress after twisting will also disappear accordingly, thereby preventing stress from causing the weld to crack or reducing the welding quality.

[0055] like Figures 1-5 As shown, the limiter 2 includes a gear 21 rotatably mounted on the outside of the induction heating device 1. The gear 21 is welded to the hinge point at the end of the sleeve 31. A toothed plate 22 is movably engaged on the outside of the housing 11. The toothed plate 22 extends to the outside of the housing 11 and is equipped with a handle 23. The toothed plate 22 meshes with the gear 21.

[0056] Using the above scheme: In the initial state, the toothed plate 22 is always meshed with the gear 21. At this time, the gear 21 cannot rotate, and the corresponding torsion device 3 will also not be able to rotate. Instead, it can only be folded in the horizontal direction, which makes it easier for the corresponding torsion device 3 to push the rectangular steel pipe 6 to twist in the correct and stable path.

[0057] Furthermore, the design of gear 21 meshing with toothed plate 22 allows toothed plate 22 to be locked at most angles, preventing the torsion device 3 from failing to rotate at only a certain angle, thus further improving the stability of the device during operation.

[0058] like Figures 1-5 As shown, a set of mutually attractive magnets are symmetrically installed on the side of the toothed plate 22 and on the housing 11. The two magnets in each set are located on the same axis and can attract each other.

[0059] The above solution is adopted: when the torsion device 3 is rotating, the toothed plate 22 is pulled by the handle 23, so that the toothed plate 22 is attracted to the housing 11 by the magnet. When the torsion device 3 needs to rotate, the toothed plate 22 will not slide to mesh with the gear 21 due to the tilt of the device. When the gear 21 and the toothed plate 22 are engaged, the friction between the two will not make the toothed plate 22 easily disengage from the gear 21.

[0060] like Figures 1-11 As shown, both limiters 2 lock the corresponding torsioners 3. Slide the nut 35 in the third torsioner 3 so that the corresponding guide cylinder 36 no longer presses the limit block 33 at its bottom. The limit block 33 guides the threaded rod 32 no longer to be threadedly connected to the sleeve 31. The threaded rod 32 can freely extend and retract inside the sleeve 31.

[0061] By rotating the nut 35 in the torsion device 3 connected to any limiter 2 using an adjustable wrench or a wrench of the corresponding size, the threaded rod 32 rotates simultaneously and drives the corresponding sleeve 31 to rotate outward and push the docking device 4 and the rectangular steel pipe 6, causing the rectangular steel pipe 6 to be twisted in the horizontal direction.

[0062] Each cover plate 41 is rotatably connected to each symmetrically arranged sleeve 31. The torsion rod 5 is rotatably connected to the top cover plate 41 of one of the connectors 4. The threaded rod 32 in the third torsion device 3 is hinged to the top cover plate 41 of the other connector 4. The hinged part is made of detachable bolts, and the hinge point is rotatably mounted on the cover plate 41.

[0063] One of the limiters 2 and two torsioners 3 are locked. When the other limiter 2 supports the rotation of the corresponding torsioner 3, the nut 35 in the third torsioner 3 is rotated, causing the threaded rod 32 to rotate and push the sleeve 31 to extend outward. The end of the rectangular steel pipe 6 can be pushed to twist in the vertical direction.

[0064] like Figures 1-11 As shown, the induction heating device 1 also includes a handle 13 fixed to the top of the housing 11. The handle 13 is made of flexible material. A nylon strap 14 is symmetrically installed on both sides of the housing 11. One end of the nylon strap 14 is riveted to the housing 11, and the other end is snapped into the housing 11.

[0065] Using the above solution: After the torsion work is completed, the bolts on the threaded rod 32 in the upper torsion device 3 are removed. At this time, the upper torsion device 3 is only hinged to the torsion rod 5. After the connector 4 is removed from the rectangular steel pipe 6, it can be folded over and the torsion rod 5 is placed against the induction heating device 1. At this time, the torsion devices 3 and torsion rod 5 can be bound to the induction heating device 1 by the nylon belt 14, thereby preventing it from shaking. The folded device can save storage space and make it easier for staff to carry or take it.

[0066] A handle 13 is also provided on the top of the housing 11, which makes it easier for operators to pick up the device during twisting operations and transportation.

[0067] like Figures 1-8 As shown, the docking device 4 includes a set of cover plates 41 arranged in a ring and closely attached to the perimeter of the rectangular steel pipe 6. Two sets of guide grooves 42 are symmetrically installed on each cover plate 41. A metal rod 43 is movably engaged inside each guide groove 42. Every two metal rods 43 in a perpendicular state are hinged to each other.

[0068] Consider a guide plate 44 and a spring telescopic rod 45 as a set of triggers. Each set of triggers is arranged circumferentially at equal angles. The guide groove 42 consists of a vertical groove and a set of horizontal grooves perpendicular to it.

[0069] Each of the two longitudinally symmetrical metal rods 43 on each cover plate 41 is movably fitted with a guide plate 44, and the two guide plates 44 are connected by a spring telescopic rod 45.

[0070] Using the above scheme: pinching the two guide plates 44 in any set of triggers will cause the corresponding metal rod 43 to disengage from the horizontal groove and move in the vertical groove. At this time, the metal rod 43 can slide freely and disengage from the rectangular steel pipe 6.

[0071] By adjusting the position of each metal rod 43 in the transverse groove at different positions by the trigger, the cover plate 41 can be attached to and fixed with rectangular steel pipes 6 of different sizes. The cover plate 41 can fit around the rectangular steel pipe 6, so no matter whether the torsion device 3 pushes or pulls the rectangular steel pipe 6, it can be torn, thereby ensuring the torsion quality.

[0072] However, it should be noted that the melting point of the material used to make the cover plate 41 needs to be higher than that of the material that may be made into the rectangular steel pipe 6, so that when the induction heating device 1 heats the rectangular steel pipe 6, the heat is transferred to the docking device 4, which causes the docking device 4 to deform under the pressure of the torsion device 3 during expansion and contraction.

[0073] As can also be seen in the figure, the inner side of the cover plate 41 is set in an arc shape, so when the device twists the circular steel pipe 8, it can also fix the circular steel pipe 8, thereby improving the applicability of the device.

[0074] like Figures 1-8 As shown, a set of guide grooves 42 on the top cover plate 41 are movably engaged with a guide rod 7, and a set of metal sleeve rods are hinged together on the two metal rods 43 on the outside. The guide rod 7 is engaged with the metal sleeve rod.

[0075] The above scheme is adopted as follows: When the device is not in use, slide the guide rod 7 to exit the horizontal groove in the guide groove 42 and move in the vertical groove. At this time, the guide rod 7 can slide freely and detach from the metal sleeve rod. At this time, the connector 4 can directly detach from the rectangular steel pipe 6 without exiting through the weld, avoiding the connector 4 being unable to detach from the rectangular steel pipe 6 due to the joint being too narrow. As can be seen in the figure, the coil 12 has a small number of turns, so that the coil 12 can pass through the joint as much as possible. The specific number of turns needs to be determined according to the actual situation, and there is no limitation.

[0076] Working principle and usage process of this invention:

[0077] The coil 12 is fitted onto the rectangular steel pipe 6, and the connector 4 is fixed onto the rectangular steel pipe 6, so that the coil 12 preheats the rectangular steel pipe 6 and thus eliminates stress.

[0078] After preheating, slide the nut 35 in the upper torsion device 3, the snap ring 34 pulls the limiting block 33 to extend outward and is not threadedly connected to the sleeve 31, and the upper threaded rod 32 can extend and retract inside the sleeve 31.

[0079] Operate the torsion device 3 on the side of the dock 4 that is connected to the upper torsion device 3;

[0080] The nut 35 and sleeve 31 in the rotary torsion device 3 rotate and push the threaded rod 32 to extend outward, and the end of the rectangular steel tube 6 is pushed to twist on the horizontal plane;

[0081] When the rectangular steel pipe 6 is horizontally twisted, the torsion bar 5 and the torsion device 3 on it will inevitably rotate synchronously, and the length of the torsion device 3 needs to be increased. However, since the sleeve 31 and the threaded rod 32 were previously operated to be freely telescopic, the torsion in this direction will not be restricted and the torsion force will not be increased.

[0082] The lower and extended torsion device 3 is operated according to the above operation procedure so that the threaded rod 32 can extend and retract inside the sleeve 31, and the corresponding limiter 2 is operated to be in an active state. The upper torsion device 3 is operated so that the sleeve 31 is threadedly connected to the limit block 33. Rotate the nut 35 in the upper torsion device 3, and the sleeve 31 pushes the threaded rod 32 to extend, so that the end of the rectangular steel pipe 6 can be twisted in the vertical direction.

[0083] Meanwhile, the ends of the rectangular steel pipe 6 can be twisted to different positions.

[0084] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0085] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel bar truss automated welding apparatus comprising an induction heating apparatus (1), characterized in that, Two sides of the induction heating equipment (1) are connected with a torsion device (3) respectively through a limiting device (2) of symmetrical design, the end of each torsion device (3) is provided with a docking device (4), the top of one of the docking devices (4) is rotatably provided with a torsion rod (5), the end of the torsion rod (5) is hingedly provided with a third torsion device (3), the third torsion device (3) is hingedly connected to the top of the other docking device (4) through a detachable bolt; The docking device (4) can be fixed on the rectangular steel pipe (6); The induction heating equipment (1) comprises a machine box (11) and a coil (12), the coil (12) is sleeved on the outer periphery of the rectangular steel pipe (6); The torsion device (3) comprises a sleeve (31) hingedly connected to the limiting device (2), a threaded rod (32) movably clamped in the sleeve (31), a plurality of limiting blocks (33) annularly clamped in the sleeve (31), each limiting block (33) extending to the outside of the sleeve (31) and being connected in series with the other limiting blocks (33) through a clamping spring (34), a nut (35) slidingly clamped on the outer periphery of the sleeve (31), and a guide cylinder (36) welded on the side surface of the nut (35) and pressing the limiting block (33) and the threaded rod (32) in threaded connection; The limiting device (2) can limit the rotation of the torsion device (3) or be in a fixed state.

2. The rebar truss automated welding apparatus of claim 1, wherein: The limiting device (2) comprises a gear (21) rotatably installed on the outside of the induction heating equipment (1), the gear (21) is welded with the hinge point at the end of the sleeve (31), the outside of the machine box (11) is movably clamped with a toothed plate (22), the toothed plate (22) extends to the outside of the machine box (11) and is provided with a handle (23), and the toothed plate (22) is engaged with the gear (21).

3. Reinforcing bar truss automated welding apparatus according to claim 2, characterized in that: The side surface of the toothed plate (22) and the machine box (11) are symmetrically provided with a plurality of mutually attractive magnets, and the two magnets in each group are located on the same axis and can attract each other.

4. The steel bar truss automated welding apparatus according to claim 1, characterized by: Both of the limiting devices (2) lock the corresponding torsion devices (3), the nut (35) in the third torsion device (3) is slid, so that the corresponding guide cylinder (36) no longer presses the limiting block (33) at the bottom thereof, the limiting block (33) guides the threaded rod (32) to be no longer in threaded connection with the sleeve (31), and the threaded rod (32) can freely stretch and retract in the sleeve (31); By rotating the nut (35) in the torsion device (3) connected with any limiting device (2) through a live-end wrench or a wrench of corresponding size, the threaded rod (32) is simultaneously rotated and drives the corresponding sleeve (31) to rotate outward to push the docking device (4) and the rectangular steel pipe (6), and the rectangular steel pipe (6) is twisted in the horizontal direction.

5. The rebar truss automated welding apparatus of claim 4, wherein: One of the limiting devices (2) and the two torsion devices (3) are in a locked state, and the other limiting device (2) can support the corresponding torsion device (3) to rotate, the nut (35) in the third torsion device (3) is rotated, so that the threaded rod (32) is rotated to push the sleeve (31) to stretch outward, and the end of the rectangular steel pipe (6) can be pushed to be twisted in the vertical direction.

6. The rebar truss automated welding apparatus of claim 1, wherein: The induction heating equipment (1) further includes a handle (13) fixed on the top of the box (11), the handle (13) is made of flexible material, and a nylon belt (14) is symmetrically installed on each side of the box (11), one end of the nylon belt (14) is riveted with the box (11), and the other end is clamped with the box (11).

7. The rebar truss automated welding apparatus of claim 1, wherein: The adapter (4) includes a group of cover plates (41) arranged around the rectangular steel pipe (6) and closely attached to the rectangular steel pipe (6), two groups of guide grooves (42) are symmetrically installed on each cover plate (41), a metal rod (43) is movably clamped in each guide groove (42), and every two metal rods (43) in a vertical state are hinged to each other. A guide plate (44) is movably sleeved on each of the two longitudinally symmetric metal rods (43) on each cover plate (41), and the two guide plates (44) are connected through spring expansion rods (45).

8. The steel bar truss automated welding apparatus according to claim 7, characterized by: One guide plate (44) and spring expansion rod (45) are regarded as a group of triggers, each group of triggers is arranged at equal angles around, the guide groove (42) is composed of a vertical groove and a group of transverse grooves in a vertical state.

9. The steel bar truss automated welding apparatus according to claim 8, characterized by: A guide rod (7) is movably clamped in a group of guide grooves (42) on the top cover plate (41), and a group of metal sleeve rods are hinged on the outer two metal rods (43), the guide rod (7) is clamped with the metal sleeve rod.

10. The steel bar truss automated welding apparatus according to claim 9, wherein: Each cover plate (41) is rotationally connected with each sleeve (31) arranged symmetrically, the torsion rod (5) is rotationally connected with the top cover plate (41) in one of the adapters (4), the threaded rod (32) in the third torsion rod (3) is hinged with the top cover plate (41) in the other adapter (4), the hinge part is composed of detachable bolts, and the hinge point is rotationally installed on the cover plate (41).

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