Clamping assembly for deformed steel bar welding gun and deformed steel bar welding gun

Abstract

The utility model relates to the technical field of stud welding, in particular to a clamping assembly for a deformed steel bar welding gun and the deformed steel bar welding gun, the clamping assembly comprises an opening and closing mechanism and two chucks, the opening and closing mechanism drives the two chucks to open and close, the chucks are horizontally arranged and clamp a reinforcing steel bar in a side face clamping mode, and the clamping assembly is used for clamping the reinforcing steel bar. The steel bars can be clamped more conveniently through side face clamping, and straight-head steel bars and bent-head steel bars can be clamped conveniently.

Description

Technical Field

[0001] This utility model relates to the field of stud welding technology, specifically to a clamping assembly for a threaded steel welding torch and a threaded steel welding torch. Background Technology

[0002] Submerged arc pressure welding is a pressure welding method in which reinforcing bars and steel plates are placed in a T-shape, and an electric arc is generated under the flux layer when welding current passes through, forming a molten pool. Pressure is then applied to complete the welding. The welding arc burns between the welding wire and the workpiece, and the arc heat melts the wire tip and the base metal and flux near the arc. The molten metal forms a molten pool, and the molten flux becomes slag. The molten pool is protected from air by the slag and flux vapors. As the arc moves forward, the arc force pushes the liquid metal in the molten pool to the rear, where it solidifies upon cooling to form the weld.

[0003] Existing submerged arc pressure welding mainly uses manual installation. The clamps for the reinforcing bars are top and bottom clamps, which need to be tightened manually before welding can be carried out. If they are not tightened, the equipment may malfunction or be damaged. Utility Model Content

[0004] This utility model provides a rebar welding torch to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A clamping assembly for a rebar welding torch includes an opening and closing mechanism and two clamps. The opening and closing mechanism drives the two clamps to open and close. The clamps are horizontally positioned to clamp the rebar using a side clamping method.

[0007] One end of the clamp is connected to a clamping plate. The clamping plate has a triangular clamping surface and an inclined transition surface. The triangular clamping surface is located at the center of the side of the clamping plate away from the clamp, and the inclined transition surface is located on both sides of the triangular clamping surface. The inclined transition surface is inclined at one end of the triangular clamping surface. By adopting the above technical solution, side clamping can more conveniently clamp reinforcing bars, whether they are straight or bent reinforcing bars. The triangular clamping surface will not slip when clamping threaded steel bars. Compared with ordinary circular clamping surfaces, triangular clamping surfaces can clamp threaded steel bars of various diameters.

[0008] Furthermore, the opening and closing mechanism is a cylinder clamping mechanism or a motor clamping mechanism. The cylinder clamping mechanism includes a first cylinder and a first connecting member. The first connecting member includes a first connecting arm, a second connecting arm, and a first connecting shaft. The first and second connecting arms can rotate around the first connecting shaft. There are two first connecting members. The first connecting arms of both first connecting members are hinged to the end of the piston rod of the first cylinder. The second connecting arm is fixedly connected to the clamp. The clamp is also provided with a rebar top for limiting the slippage of the rebar. The first cylinder is covered with a first cylinder housing, and the first connecting shaft is fixed to the first cylinder housing. By adopting the above technical solution, the clamping assembly can be driven by a motor and a cylinder to quickly clamp the rebar.

[0009] A threaded steel welding torch includes a motor, a lead screw, a lead screw slider, a main shaft, and a clamping assembly. The motor shaft is connected to the lead screw, driving it to rotate. The lead screw slider is threadedly connected to the lead screw and can slide on the lead screw. The slider is fixedly connected to the main shaft, and the clamping assembly is fixedly connected to the lower end of the main shaft. By adopting the above technical solution, the threaded steel welding torch can weld both straight and bent reinforcing bars, and can also weld reinforcing bars of the same diameter.

[0010] Furthermore, the system also includes a flux containment unit, which employs a pneumatic or electric clamping mechanism. The pneumatic clamping mechanism comprises a second cylinder, a second connecting member, a submerged arc flux chuck, and a submerged arc flux baffle. The second connecting member includes a third connecting arm, a fourth connecting arm, and a second connecting shaft. The third and fourth connecting arms are rotatable around the connecting shaft. The third connecting arm is hinged to the end of the piston rod of the second cylinder, and the fourth connecting arm is fixedly connected to the submerged arc flux chuck. The submerged arc welding baffle is connected to the end of the submerged arc flux chuck away from the second connecting member. Two of each of the second connecting member, submerged arc flux chuck, and submerged arc welding baffle are provided, and the two submerged arc welding baffles can form a closed circle. A second cylinder housing is fitted over the second cylinder, and the second connecting shaft is fixed to the second cylinder housing. By adopting the above technical solution, the clamping assembly can be driven by a motor and cylinder to quickly open and close the submerged arc flux baffle.

[0011] Furthermore, the welding torch also includes a connecting plate, a torch rod, an upper connecting block, a lower connecting block, a sliding rod, and a slider. The connecting plate is connected to the motor and the lead screw. The slider is slidably connected to the sliding rod. The upper end of the sliding rod is fixedly connected to the upper connecting block, and the lower end of the sliding rod is fixedly connected to the lower connecting block. An upper spring is provided between the upper end of the slider and the upper connecting block, and a lower spring is provided between the lower end of the slider and the lower connecting block. Both the upper and lower connecting blocks are fixedly connected to the connecting plate. Both the upper and lower connecting blocks have circular holes for the torch rod to pass through. The torch rod passes through the circular holes and is fixedly connected to the upper and lower connecting blocks. A connecting block is provided at the lower end of the torch rod, and the torch rod is fixedly connected to the flux containment unit through this connecting block. By adopting the above technical solution, the lifting slider slides to drive the welding torch to move smoothly up and down.

[0012] Furthermore, the motor is mounted on a motor mounting plate, which is mounted on the upper part of a connecting plate. The motor is equipped with a protective housing. The motor shaft is fixedly connected to a lead screw via a coupling. The lead screw is connected by an upper connecting seat and a lower connecting seat. The upper connecting seat is mounted on the upper part of the connecting plate, and the lower connecting seat is mounted on the lower end of the connecting plate. By adopting the above technical solution, the lead screw, motor, and other components are compactly installed.

[0013] Furthermore, ball bearings are fitted at the connections between the lead screw and both the upper and lower connecting seats. By adopting the above technical solution, the bearings can effectively reduce the radial and axial clearances between the lead screw and the support structure, preventing vibration or displacement of the welding torch when lifting or pressing down the stud. In arc stud welding, the lead screw needs to precisely control the arc-starting clearance of the stud, and the stability of the bearings is directly related to the welding quality.

[0014] Furthermore, the slider includes a lead screw connection, a main shaft connection, a slide rail, and an insulating sheet. The insulating sheet is located between the lead screw connection and the main shaft connection. The slide groove is located on the side of the lead screw connection away from the insulating sheet. The lead screw connection, the main shaft connection, the slide groove, and the insulating sheet are fixedly connected. The lead screw connection has a threaded hole for connecting the lead screw. The connecting plate has a slide groove on the side near the lead screw, located between the upper connecting seat and the lower connecting seat. The slide rail of the slider can slide within the slide groove. By adopting the above technical solution, the lead screw connection and the main shaft connection are separated, avoiding mutual interference between the main shaft and the lead screw.

[0015] Furthermore, a buffer spring is connected between the upper end of the lead screw connection and the lower end of the upper connecting seat, and the buffer spring is sleeved on the outside of the lead screw. By adopting the above technical solution, the buffer spring can absorb the impact force generated when the lead screw moves, reduce mechanical vibration, avoid damage to the precision components inside the welding torch due to impact, and extend the equipment life.

[0016] Furthermore, the welding torch is equipped with a first sensor, a second sensor, and a third sensor for detecting whether the welding torch has malfunctioned. All three sensors are fixed to the connecting plate. The first sensor is positioned horizontally between the upper connecting block and the top surface of the lifting slider, the third sensor is positioned horizontally between the lower connecting block and the bottom surface of the lifting slider, and the second sensor is positioned above the third sensor. When the welding torch malfunctions and the lifting slider cannot move, the first or third sensor detects the lifting slider and triggers an alarm to protect the welding torch and personnel safety. By adopting the above technical solution, welding torch operation can be stopped promptly in case of a malfunction, thus protecting both equipment and personnel safety.

[0017] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Appendix Figure 1 This utility model discloses an exploded schematic diagram of a rebar welding torch.

[0020] Appendix Figure 2 This utility model discloses an internal schematic diagram of a threaded steel welding torch.

[0021] Appendix Figure 3 : A schematic diagram of the overall structure of a rebar welding torch according to this utility model;

[0022] Appendix Figure 4 Schematic diagram of the clamping assembly of this utility model Figure 1 ;

[0023] Appendix Figure 5 Explosion-proof diagram of the clamping assembly used in this utility model Figure 1 ;

[0024] Appendix Figure 6 Explosion-proof diagram of the clamping assembly used in this utility model Figure 2 ;

[0025] Appendix Figure 7 Schematic diagram of the clamping assembly of this utility model Figure 2 ;

[0026] Appendix Figure 8: A schematic diagram of the connection structure between the first cylinder and the first connecting member in this utility model;

[0027] Appendix Figure 9 Top view of the steel reinforcement frame plate of this utility model Figure 1 ;

[0028] Appendix Figure 10 Top view of the steel reinforcement frame plate of this utility model Figure 2 ;

[0029] Appendix Figure 11 : A schematic diagram of the structure of the flux enclosure unit of this utility model;

[0030] Appendix Figure 12 : An exploded schematic diagram of the flux containment unit of this utility model;

[0031] Appendix Figure 13 : Schematic diagram of the lead screw and slider connection structure of this utility model;

[0032] Appendix Figure 14 This utility model relates to a rebar welding gun, including a handheld grip.

[0033] Labels in the diagram: 1. Motor; 2. Lead screw; 3. Lead screw slider; 4. Spindle; 5. Clamping assembly; 51. First cylinder; 511. First connecting arm; 512. Second connecting arm; 513. First connecting shaft; 52. First connecting piece; 53. Chuck; 54. Clamping plate; 541. Arc-shaped clamping surface; 542. Inclined transition surface; 543. Triangular clamping surface; 55. Reinforcing bar top; 56. First cylinder housing; 57. Connecting piece; 581. Clamping motor; 582. Clamping lead screw; 583. Nut; 584. Nut limiting piece; 6. Submerged arc Flux containment unit; 61, second cylinder; 62, second connector; 621, third connecting arm; 622, fourth connecting arm; 623, second connecting shaft; 63, submerged arc flux chuck; 64, submerged arc flux baffle; 65, second cylinder housing; 71, connecting plate; 711, slide groove; 712, first sensor; 713, second sensor; 714, third sensor; 72, gun barrel; 73, upper connecting block; 74, lower connecting block; 75, slide bar; 76, lifting slider; 77, upper spring; 78, lower spring; 79, connecting block; Detailed Implementation

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] like Figures 1-3 As shown, a rebar welding gun includes a motor 1, a lead screw 2, a lead screw slider 3, a main shaft 4, and a clamping assembly 5. The motor shaft of the motor 1 is connected to the lead screw 2, which drives the lead screw 2 to rotate. The lead screw slider 3 is threadedly connected to the lead screw 2 and can slide on the lead screw 2. The lead screw slider 3 is fixedly connected to the main shaft 4. The clamping assembly 5 is fixedly connected to the lower end of the main shaft 4. The clamping assembly 5 clamps the rebar using a side clamping method.

[0037] like Figures 4-6As shown, the clamping assembly includes an opening and closing mechanism and a clamp 53. The opening and closing mechanism drives the clamp 53 to open and close. The clamp 53 is horizontally positioned and clamps the reinforcing bar using a side clamping method. The opening and closing mechanism is a cylinder clamping mechanism or a motor clamping mechanism. The cylinder clamping mechanism includes a first cylinder 51 and a first connecting member 52. The first connecting member 52 includes a first connecting arm 511, a second connecting arm 512, and a first connecting shaft 513. The first connecting arm 511 and the second connecting arm 512 can rotate around the first connecting shaft 513. Arm 511 is hinged to the piston rod end of the first cylinder 51. The second connecting arm 512 is fixedly connected to the chuck 53. The end of the chuck 53 away from the first connecting member 52 is connected to a clamping plate 54. There are two symmetrically arranged first connecting members 52, chucks 53 and clamping plates 54. The chuck 53 is also provided with a rebar top 55 for limiting the sliding of the rebar. The first cylinder 51 is covered with a first cylinder housing 56. The first connecting shaft 513 is fixed on the first cylinder housing 56. The first cylinder housing 56 is fixedly connected to the main shaft 4 through a connecting piece 57.

[0038] Both first connecting members 52 are hinged to the same point at the end of the piston rod. When the piston rod extends, the first connecting arms 511 of the two first connecting members 52 rotate away from the cylinder, and the second connecting arms 512 of the two first connecting members 52 open. When the piston rod retracts, the first connecting arms 511 of the two first connecting members 52 rotate towards the first cylinder 51, and the second connecting arms 512 of the two first connecting members 52 close. By injecting or extracting compressed gas into the first cylinder 51, the piston rod slides within the first cylinder 51, enabling the first connecting members 52 to rotate around the first connecting shaft 513, thus allowing the clamps 53 and clamping plates 54 to open and close to clamp the reinforcing bars.

[0039] The motor clamping mechanism includes a clamping motor 581, a clamping screw 582, a nut 583, and a nut limiting member 584. The output end of the clamping motor 581 is coaxially and fixedly connected to the clamping screw. The nut 583 is threadedly connected to the clamping screw. The nut limiting member restricts the rotation of the nut. The clamping motor 581 drives the clamping screw to rotate, and the rotation of the clamping screw causes the nut to slide on the clamping screw. The nut is fixedly connected to a cylinder, which drives the cylinder to move. By extending and retracting the piston rod of the cylinder driven by the rebar clamping motor, the opening and closing of the clamp can be achieved without injecting and extracting compressed gas into the cylinder, making motor clamping more stable. The clamping assembly 5 can clamp the rebar pneumatically or electrically, or it can clamp using both electric and pneumatic methods.

[0040] The top of the reinforcing bar 55 is inverted "L" shape. The lower end of its vertical section is fixedly connected to the clamp 53, and the upper end of its vertical section is connected to the horizontal section. After the clamping assembly 5 clamps the reinforcing bar, the reinforcing bar is located directly below the horizontal section of the top of the reinforcing bar 55. The contact between the upper part of the reinforcing bar and the horizontal section can be adjusted to prevent the reinforcing bar from slipping when pressing down.

[0041] like Figure 7 As shown, the clamping plate 54 is provided with an arc-shaped clamping surface 541 and an inclined transition surface 542. The arc-shaped clamping surface 541 is located at the center of the side of the clamping plate 54 away from the clamp head 53, and the inclined transition surface 542 is located on both sides of the arc-shaped clamping surface 541. The inclined transition surface 542 is inclined towards one end of the arc-shaped clamping surface 541.

[0042] Optional, such as Figure 8 As shown, the clamping plate 54 can be replaced by a triangular clamping surface 543 instead of a circular arc clamping surface 541. The clamping surface of a single clamping plate 54 is similar to a "triangle", which makes the clamping more stable, less prone to slippage, and can adapt to steel bars of different diameters. The clamping surface of the clamping plate 54 is provided with multiple circular holes, which facilitates engagement with the threads on the rebar and improves the stability of clamping the rebar.

[0043] like Figures 8-9As shown, the threaded steel welding gun also includes a submerged arc welding flux containment unit 6, which is an openable containment plate. The flux containment unit employs a pneumatic clamping mechanism (or an electric clamping mechanism). The pneumatic clamping mechanism includes a second cylinder, a second connecting member, a submerged arc flux chuck, and a submerged arc flux baffle. The second connecting member 62 includes a third connecting arm 621, a fourth connecting arm 622, and a second connecting shaft 623. The third connecting arm 621 and the fourth connecting arm 622 are rotatable around the second connecting shaft 623. The third connecting arm 621 is hinged to the end of the piston rod of the second cylinder 61. The fourth connecting arm 622 is fixedly connected to the submerged arc flux chuck 63. The submerged arc flux baffle 64 is connected to the end of the submerged arc flux chuck 63 away from the second connecting member 62. Two of each of the second connecting member 62, the submerged arc flux chuck 63, and the submerged arc flux baffle 64 are provided. The two submerged arc flux baffles 64 can form a closed circle. The second cylinder 61 is fitted with a second cylinder housing 65, and the second connecting shaft 623 is fixed to the second cylinder housing 65. Both second connecting members 62 are hinged to the same point at the end of the piston rod. When the piston rod extends, the third connecting arms 621 of the two second connecting members 62 rotate away from the cylinder, and the fourth connecting arms 622 of the two second connecting members 62 open. When the piston rod retracts, the third connecting arms 621 of the two second connecting members 62 rotate towards the cylinder, and the fourth connecting arms 622 of the two second connecting members 62 close. By injecting or extracting compressed gas into the second cylinder 61, the piston rod slides within the second cylinder 61, enabling the second connecting members 62 to rotate around the second connecting shaft 623, thus opening and closing the submerged arc welding flux containment unit 6. The baffle motor assembly is similar in structure to the rebar clamp motor assembly, and will not be described in detail here. The submerged arc welding flux containment unit 5 can be opened and closed pneumatically or electrically, or a combination of both.

[0044] like Figure 1 As shown, the welding torch also includes a connecting plate 71, a torch rod 72, an upper connecting block 73, a lower connecting block 74, a sliding rod 75, and a lifting slider 76. The connecting plate 71 is connected to the motor 1 and the lead screw 2. The slider is slidably connected to the sliding rod 75. The upper end of the sliding rod 75 is fixedly connected to the upper connecting block 73, and the lower end of the sliding rod 75 is fixedly connected to the lower connecting block 74. An upper spring 77 is provided between the upper end of the slider and the upper connecting block 73, and the lower end of the slider is fixedly connected to the lower connecting block 74. A lower spring 78 is provided. The upper connecting block 73 and the lower connecting block 74 are both fixedly connected to the connecting plate 71. The upper connecting block 73 and the lower connecting block 74 are both provided with round holes for the gun rod 72 to pass through. The gun rod 72 passes through the round holes and is fixedly connected to the upper connecting block 73 and the lower connecting block 74. A connecting block 79 is provided at the lower end of the gun rod 72. The gun rod 72 is fixedly connected to the flux containment unit through the connecting block 79.

[0045] like Figure 1 As shown, the motor 1 is mounted on the motor mounting plate 11, which is mounted on the upper end of the connecting plate 71. The motor 1 is equipped with a motor protective shell 12. The motor shaft of the motor 1 is fixedly connected to the lead screw 2 via a coupling 13. The lead screw 2 is connected by an upper connecting seat 21 and a lower connecting seat 22. The upper connecting seat 21 is mounted on the upper part of the connecting plate 71, and the lower connecting seat 22 is mounted on the lower end of the connecting plate 71. A ball bearing 23 is fitted onto the lead screw 2. The ball bearing 23 is located at the connection point between the lead screw 2 and the upper connecting seat 21 and the lower connecting seat 22. The ball bearing 23 effectively reduces the radial and axial clearance between the lead screw 2 and the supporting structure, preventing vibration or displacement of the welding torch when lifting or pressing down the studs, thus improving motion accuracy. The ball bearing 23 ensures that there is no radial oscillation when the lead screw 2 rotates, avoiding rebar positioning deviation.

[0046] like Figure 10 As shown, the lead screw slider 3 includes a lead screw connecting part 31, a main shaft connecting part 32, a slide rail 33, and an insulating sheet 34. The insulating sheet 34 is located between the lead screw connecting part 31 and the main shaft connecting part 32. The slide rail 33 is located on the side of the lead screw connecting part 31 away from the insulating sheet 34. The lead screw connecting part 31, the main shaft connecting part 32, the slide groove 711, and the insulating sheet 34 are fixedly connected. The lead screw connecting part 31 is provided with a threaded hole for connecting the lead screw 2. The connecting plate 71 is provided with a slide groove 711 on the side near the lead screw 2. The slide groove 711 is located between the upper connecting seat 21 and the lower connecting seat 22. The slide rail 33 of the slider can slide within the slide groove 711. A buffer spring 24 is connected between the upper end of the lead screw connecting part 31 and the lower end of the upper connecting seat 21. The buffer spring 24 is sleeved on the outside of the lead screw 2.

[0047] The lifting slider 76 can be connected to automated equipment such as a robotic arm or a mobile module, and the welding torch can be controlled by controlling the lifting slider 76. Optionally, such as Figure 13 As shown, the lifting slider 76 can also be connected to a handle for manual control of the welding torch. This embodiment uses the lifting slider connected to automated equipment as an example to further illustrate its specific implementation.

[0048] like Figure 2 As shown, the welding torch is also equipped with a first sensor 712, a second sensor 713 and a third sensor 714. The first sensor 712, the second sensor 713 and the third sensor 714 are all fixed on the connecting plate. The first sensor 712 is horizontally located between the upper connecting block 73 and the top surface of the lifting slider 76. The third sensor 714 is horizontally located between the lower connecting block 74 and the bottom surface of the lifting slider 76. The second sensor 713 is located above the third sensor 714.

[0049] Under normal circumstances, the clamping assembly 5 clamps the threaded steel bar so that the upper end of the threaded steel bar is flush with the top of the steel bar 55. The automatic equipment moves the lifting slider 76 up and down to control the welding torch to move up and down. The first sensor 712 or the third sensor 714 cannot detect the lifting slider 76. When the flux containment unit touches the workpiece to be welded, the second sensor receives the corresponding signal, the automatic equipment stops moving and welding, and the motor can be started to perform welding.

[0050] When a malfunction occurs, such as welding being performed incorrectly without clamping the rebar, resulting in the clamping plate or submerged arc welding flux baffle being welded to the workpiece, or the welding torch failing to move when the lifting slider 76 is raised, the lifting slider 76 rises, compressing the upper spring 77. When the lifting slider is at the same horizontal level as the first sensor, the first sensor detects the lifting slider, and the automated equipment stops moving the lifting slider upwards and triggers an alarm device to protect the robotic arm or moving module. Alternatively, if the automated equipment's programming position is incorrect, and the threaded steel or submerged arc welding flux baffle touches an obstacle, the second sensor will not receive a signal that the submerged arc welding flux baffle is touching the workpiece. The automated equipment will continue to move the lifting slider downwards, the welding torch will not move, the upper and lower springs will compress, and when the lifting slider is at the same horizontal level as the third sensor, the third sensor detects the lifting slider, and the automated equipment will stop moving the lifting slider upwards and trigger an alarm device to protect the robotic arm or moving module. After manual troubleshooting and resolution, the welding torch will continue to operate normally.

[0051] After the submerged arc welding flux baffle 64 contacts the workpiece, flux is filled into the flux baffle 64. Since the slide rail 33 of the lead screw slider 3 is embedded in the first slide groove 711, when the lead screw 2 rotates, the lead screw slider 3 does not rotate with the lead screw 2, but moves up and down on the lead screw 2 and in the second slide groove 711. The starting motor 1 drives the threaded steel bar to contact the workpiece and move upward, leaving an arc-starting gap between the bottom of the threaded steel bar and the workpiece. Current passes through the end of the steel bar to generate resistance heat, heating it to a plastic state. When the end of the steel bar reaches the welding temperature, upsetting pressure is applied to make the end of the steel bar tightly bonded to the steel plate. Heating is stopped and pressure is maintained to allow the welded joint to cool and solidify, completing the welding. Regardless of the length of the threaded steel bar, its bottom can be made to contact the workpiece before moving upward, ensuring that the upward movement distance of threaded steel bars of different lengths is the same, thus ensuring a consistent arc-starting gap and guaranteeing welding quality.

[0052] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A clamping assembly for a threaded steel welding torch, characterized in that, It includes an opening and closing mechanism and a clamp (53). The opening and closing mechanism drives the clamp (53) to open and close. The clamp (53) is horizontally arranged and clamps the steel bars by side clamping. One end of the clamp (53) is connected to a clamping plate (54). The clamping plate (54) is provided with a triangular clamping surface (543) and an inclined transition surface (542). The triangular clamping surface (543) is located at the center of the side of the clamping plate (54) away from the clamp (53). The inclined transition surface (542) is located on both sides of the triangular clamping surface (543). The inclined transition surface (542) is inclined towards one end of the triangular clamping surface (543).

2. The clamping assembly for a threaded steel welding torch according to claim 1, characterized in that, The opening and closing mechanism is a cylinder clamping mechanism or a motor clamping mechanism. The cylinder clamping mechanism includes a first cylinder (51) and a first connecting member (52). The first connecting member (52) includes a first connecting arm (511), a second connecting arm (512), and a first connecting shaft (513). The first connecting arm (511) and the second connecting arm (512) can rotate around the first connecting shaft (513). There are two first connecting members (52). The first connecting arm (511) of the two first connecting members (52) is hinged to the piston rod end of the first cylinder (51). The second connecting arm (512) is fixedly connected to the clamp (53). The clamp (53) is also provided with a steel bar top (55) for limiting the sliding of the steel bar. The first cylinder (51) is covered with a first cylinder shell (56). The first connecting shaft (513) is fixed on the first cylinder shell (56).

3. A rebar welding torch, characterized in that, The device includes a motor (1), a lead screw (2), a lead screw slider (3), a main shaft (4), and a clamping assembly (5) as described in any one of claims 1-2. The motor shaft of the motor (1) is connected to the lead screw (2) to drive the lead screw (2) to rotate. The lead screw slider (3) is threadedly connected to the lead screw (2). The lead screw slider (3) can slide on the lead screw (2). The lead screw slider (3) is fixedly connected to the main shaft (4). The clamping assembly (5) is fixedly connected to the lower end of the main shaft (4).

4. The threaded steel welding torch according to claim 3, characterized in that, It also includes a flux containment unit (6), which employs a pneumatic clamping mechanism or an electric clamping mechanism. The pneumatic clamping mechanism includes a second cylinder (61), a second connecting member (62), a submerged arc flux clamp (63), and a submerged arc welding baffle (64). The second connecting member (62) includes a third connecting arm (621), a fourth connecting arm (622), and a second connecting shaft (623). The third connecting arm (621) and the fourth connecting arm (622) are rotatable around the second connecting shaft (623). The third connecting arm (621) and the second cylinder (61) are connected... The piston rod is hinged at the end, the fourth connecting arm (622) is fixedly connected to the submerged arc welding flux chuck (63), the submerged arc welding baffle (64) is connected to the end of the submerged arc welding flux chuck (63) away from the second connecting member (62), the second connecting member (62), the submerged arc welding flux chuck (63) and the submerged arc welding baffle (64) are all provided in two, the two submerged arc welding baffles (64) can form a closed circle, the second cylinder (61) is covered with a second cylinder shell (65), and the second connecting shaft (623) is fixed on the second cylinder shell (65).

5. The threaded steel welding torch according to claim 4, characterized in that, The welding torch also includes a connecting plate (71), a torch rod (72), an upper connecting block (73), a lower connecting block (74), a sliding rod (75), and a lifting slider (76). The slider is slidably connected to the sliding rod (75). The upper end of the sliding rod (75) is fixedly connected to the upper connecting block (73), and the lower end of the sliding rod (75) is fixedly connected to the lower connecting block (74). An upper spring (77) is provided between the upper end of the slider and the upper connecting block (73), and a lower spring is provided between the lower end of the slider and the lower connecting block (74). Spring (78), the upper connecting block (73) and the lower connecting block (74) are both fixedly connected to the connecting plate (71). The upper connecting block (73) and the lower connecting block (74) are both provided with round holes for the gun rod (72) to pass through. The gun rod (72) is fixedly connected to the upper connecting block (73) and the lower connecting block (74) through the round holes. The lower end of the gun rod (72) is provided with a connecting block (79). The gun rod (72) is fixedly connected to the submerged arc welding flux enclosure unit (6) through the connecting block (79).

6. The threaded steel welding torch according to claim 5, characterized in that, The motor (1) is mounted on the motor mounting plate (11), which is mounted on the upper end of the connecting plate (71). The motor (1) is provided with a motor protective shell (12). The motor shaft of the motor (1) is fixedly connected to the lead screw (2) through a coupling (13). The lead screw (2) is connected to an upper connecting seat (21) and a lower connecting seat (22) at the top and bottom. The upper connecting seat (21) is mounted on the upper part of the connecting plate (71), and the lower connecting seat (22) is mounted on the lower end of the connecting plate (71).

7. The threaded steel welding torch according to claim 6, characterized in that, Ball bearings (23) are fitted at the connection points between the lead screw (2) and the upper connecting seat (21) and the lower connecting seat (22).

8. The threaded steel welding torch according to claim 7, characterized in that, The slider includes a lead screw connection (31), a main shaft connection (32), a slide rail (33), and an insulating sheet (34). The insulating sheet (34) is located between the lead screw connection (31) and the main shaft connection (32). The slide rail (33) is located on the side of the lead screw connection (31) away from the insulating sheet (34). The lead screw connection (31), the main shaft connection (32), the slide rail (33), and the insulating sheet (34) are fixedly connected. The lead screw (2) connection has a threaded hole for connecting the lead screw (2). The connecting plate (71) has a groove (711) on the side near the lead screw (2). The groove (711) is located between the upper connecting seat (21) and the lower connecting seat (22). The slide rail (33) of the slider (3) can slide in the groove (711).

9. The threaded steel welding torch according to claim 8, characterized in that, A buffer spring (24) is connected between the upper end of the lead screw connection part (31) and the lower end of the upper connecting seat (21), and the buffer spring is sleeved on the outside of the lead screw.

10. The threaded steel welding torch according to claim 8, characterized in that, The welding torch is also equipped with a first sensor (712), a second sensor (713), and a third sensor (714) for detecting whether the welding torch has malfunctioned. The first sensor (712), the second sensor (713), and the third sensor (714) are all fixed on the connecting plate. The first sensor (712) is horizontally located between the upper connecting block (73) and the top surface of the lifting slider (76). The third sensor (714) is horizontally located between the lower connecting block (74) and the bottom surface of the lifting slider (76). The second sensor (713) is located above the third sensor (714). When the welding torch malfunctions and the lifting slider (76) cannot move the welding torch, the first sensor (712) or the third sensor (714) can detect the lifting slider (76) and trigger the alarm device to protect the welding torch and personal safety.

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