A reinforcing bar resistance welding device

Abstract

This invention discloses a rebar resistance welding device, comprising: an upper bonding component for bonding a first rebar at its bottom; a swing arm rotatably mounted on the left and right sides of the upper bonding component along a horizontal axis; a lower bonding component connected to the swing arm for bonding a second rebar; and a bonding pressure mechanism for applying a pre-tightening force to the swing arm, the pre-tightening force driving the swing arm to bond the lower bonding component to the second rebar. The bonding pressure mechanism of this invention applies a pre-tightening force to the swing arm, ensuring that the lower bonding component and the second rebar, and the upper bonding component and the first rebar, remain in close contact, improving the electrical contact stability between the device and the rebar, and ensuring uniform and efficient generation of resistance heat. The overall structure employs a linkage between the upper bonding component, the swing arm, and the lower bonding component, resulting in a compact and portable design. Rebar welding can be completed without complex procedures, improving the efficiency of rebar connection on construction sites and enhancing the overall stability and structural safety of the rebar cage.

Description

Technical Field

[0001] This invention relates to the field of steel bar processing technology, and in particular, to a steel bar resistance welding apparatus. Background Technology

[0002] As the core reinforcing material of concrete structures, steel bars are widely used in construction projects such as buildings, bridges, and tunnels. The connection and fixing of transverse and longitudinal steel bars is a key process in steel bar construction. Currently, the lap splicing and fixing of transverse and longitudinal steel bars on construction sites generally adopts the method of binding with wire. This method requires sequentially pulling, cutting, and binding the wire, which is cumbersome, time-consuming, labor-intensive, and inefficient. At the same time, the binding wire itself has low strength, resulting in poor connection firmness of the steel bar lap joints. It is prone to loosening during concrete pouring and structural stress, affecting the overall stability of the steel bar cage and structural safety.

[0003] While existing resistance welding equipment can achieve steel bar welding and fixing, most of them are large fixed equipment, which are bulky and have poor portability, making it difficult to meet the flexible and rapid steel bar lap welding needs on construction sites. Some simple welding tools lack a positioning and stable pressure structure for the steel bars, which makes them prone to misalignment during welding, and the electrical contact between the equipment and the steel bars is unstable. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a steel bar resistance welding device.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A rebar resistance welding device includes: an upper bonding assembly with its bottom for bonding a first rebar; a swing arm rotatably mounted on the left and right sides of the upper bonding assembly along a horizontal axis; a lower bonding component connected to the swing arm for bonding with a second rebar; and a bonding pressure mechanism for applying a pre-tightening force to the swing arm, wherein the pre-tightening force drives the swing arm to bond the lower bonding component with the second rebar.

[0006] Furthermore, it also includes a handle rod, which is mounted on the upper end of the upper bonding assembly.

[0007] Furthermore, the upper surface of the upper bonding component is provided with a socket at its center, and the socket is provided with an opening groove on the left and right sides; the upper end of the swing arm is provided with a horizontal section extending horizontally to the left and right, the horizontal section is embedded in the opening groove and the end is embedded in the socket, and the end of the horizontal section embedded in the socket is provided with an outward expansion limiting head; the bottom of the handle rod is provided with a positioning shaft for inserting into the socket, and the positioning shaft is provided with pressure blocks on the left and right sides, the lower end of the pressure block is in contact with the outer surface of the horizontal section, the end of the pressure block facing the socket is in contact with one side of the outward expansion limiting head, and the lower end of the positioning shaft is provided with a downward protruding limiting protrusion, the limiting protrusion is in contact with the other side of the outward expansion limiting head.

[0008] Furthermore, the upper bonding component includes a bonding block and a connecting block, the bonding block is installed at the lower end of the connecting block, and the insertion hole and the opening slot are both formed in the connecting block.

[0009] Furthermore, the upper end of the bonding block is provided with multiple connecting positioning rods, the upper end of the connecting positioning rods is provided with threaded shafts, the connecting block is provided with through holes for the connecting positioning rods to be inserted, the upper end of the pressure block is provided with a connecting strip that fits against the upper surface of the connecting block; the connecting strip is provided with connecting holes corresponding to the through holes, and the threaded shaft extends out of the through holes and connecting holes and is connected with a fastening nut.

[0010] Furthermore, the swing arm has a through first wire hole at its center, and the peripheral wall of the first wire hole has a first wire notch. The handle rod and the positioning shaft have a through second wire hole at their centers, and the peripheral wall of the second wire hole has a second wire notch. The first wire hole and the second wire hole converge and communicate at the insertion hole.

[0011] Furthermore, the lower end of the swing arm is provided with an extension section, the extension direction of which is perpendicular to the horizontal section; the outer end of the extension section is provided with a threaded section, the bottom of the lower fitting part is provided with a sleeve fitted onto the extension section, the threaded section is threadedly connected to a limit nut, the extension section is provided with an axial limit block, and the sleeve is located between the axial limit block and the limit nut.

[0012] Furthermore, the sleeve has a notch on its peripheral wall, and the extension has a limiting protrusion on its peripheral wall that is embedded in the notch. The sleeve is rotatably fitted onto the extension and its rotation range is limited by the limiting protrusion.

[0013] Furthermore, the bonding and pressure-applying mechanism is a tension spring, with one end of the tension spring connected to the upper bonding component and the other end connected to the swing arm.

[0014] Furthermore, the bonding and pressure-applying mechanism includes a rotary motor and a turbine. The output shaft of the rotary motor is connected to a worm gear, and the turbine is connected to the worm gear drive. Winding rods are connected to both sides of the center of the turbine. The winding rods are rotatably mounted on the upper bonding assembly along their own horizontal axis. A winding and releasing rope is connected between the winding rods and the swing arm.

[0015] The present invention has the following beneficial effects: The upper bonding component is positioned and bonded to the first rebar, while the lower bonding component, driven by the swing arm, stably bonds to the second rebar, achieving precise alignment between the device and the two rebars and effectively preventing misalignment during welding. The bonding pressure mechanism applies a pre-tightening force to the swing arm, ensuring a tight bond between the lower bonding component and the second rebar, and between the upper bonding component and the first rebar, thus improving the electrical contact stability between the device and the rebars and ensuring uniform and efficient generation of resistance heat. The entire system employs a linked structure of the upper bonding component, swing arm, and lower bonding component, resulting in a compact and portable design. Rebar welding can be completed without complex procedures, improving the efficiency of rebar connection on construction sites and enhancing the overall stability and structural safety of the rebar cage.

[0016] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the decomposed state structure; Figure 3 yes Figure 1 A schematic diagram of the decomposed state structure from another perspective; Figure 4 This is a partial exploded view of the structure at the lower bonding component of the present invention; Figure 5 This is a schematic diagram of the exploded state of a portion of the structure of the present invention; Figure 6 This is a partial cross-sectional view of the present invention; Figure 7 This is a cross-sectional view of the lower bonding part.

[0018] Legend: Upper bonding component 100, first reinforcing bar 101, second reinforcing bar 102, insertion hole 110, opening groove 120, bonding block 130, connecting positioning rod 131, threaded shaft 132, connecting block 140, through hole 141; Swing arm 200, horizontal section 210, outwardly expanding limiting head 211, extension section 220, threaded section 221, limiting nut 222, axial limiting block 223, limiting protrusion 224, first wire passage hole 230, first wire passage notch 231; Lower bonding component 300, sleeve 310, notch 311; The components include: a pressure-applying mechanism 400, a rotary motor 410, a worm gear 411, a turbine 420, a winding rod 421, a take-up and release rope 422, and a limiting protrusion 423. Handle rod 500, positioning shaft 510, limiting protrusion 511, pressure block 520, limiting gap 521, connecting strip 530, connecting hole 531, second wire passage hole 540, second wire passage notch 541. Detailed Implementation

[0019] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0023] Please refer to Figure 1 and Figure 2 A preferred embodiment of the present invention provides a steel bar resistance welding device, comprising an upper bonding component 100, a swing arm 200, a lower bonding component 300, and a bonding pressure mechanism 400.

[0024] The bottom of the upper bonding component 100 is used for bonding the first reinforcing bar 101.

[0025] The swing arms 200 are rotatably mounted on the left and right sides of the upper bonding assembly 100 along a horizontal axis. The lower bonding component 300 is connected to the swing arms 200 and is used to bond with the second reinforcing bar 102. The bonding pressure mechanism 400 is used to apply a pre-tightening force to the swing arms 200. The pre-tightening force drives the swing arms 200 to rotate and move, thereby causing the lower bonding component 300 to bond with the second reinforcing bar 102. Of course, while the pre-tightening force can cause the lower bonding component 300 to bond with the second reinforcing bar 102, the reaction force received by the bonding pressure mechanism 400 will cause the upper bonding assembly 100 to bond more closely with the first reinforcing bar 101, thus achieving a bidirectional pre-tightening clamping effect.

[0026] This invention provides a rebar resistance welding device. An upper bonding component 100 is bonded and positioned to a first rebar 101, while a lower bonding component 300, driven by a swing arm 200, stably bonds to a second rebar 102, achieving precise alignment between the device and the two rebars and effectively preventing misalignment during welding. A bonding pressure mechanism 400 applies a pre-tightening force to the swing arm 200, ensuring a tight bond between the lower bonding component 300 and the second rebar 102, and between the upper bonding component 100 and the first rebar 101, thereby improving the electrical contact stability between the device and the rebar and ensuring uniform and efficient generation of resistance heat. The overall structure, employing the linkage of the upper bonding component 100, swing arm 200, and lower bonding component 300, is compact and portable, enabling rebar welding without complex procedures, improving the efficiency of rebar connection on construction sites, and enhancing the overall stability and structural safety of the rebar skeleton. When using this device for welding, the first reinforcing bar 101 and the second reinforcing bar 102 are in point contact, resulting in a small effective contact area. However, the bonding block 130 and the first reinforcing bar 101, and the lower bonding component 300 and the second reinforcing bar 102, are in surface or line contact, resulting in a significantly larger contact area. After energization, based on the principle that resistance is inversely proportional to the contact area, resistance and heat are highly concentrated at the contact point between the two reinforcing bars, causing that location to rapidly heat up and melt. Under pressure, this results in the fusion welding of the two reinforcing bars.

[0027] Reference Figure 1 and Figure 2 In some embodiments of the present invention, a handle 500 is also included, which is mounted on the upper end of the upper bonding component 100. By providing a handle 500 on the upper end of the upper bonding component 100, a stable handhold for applying force is provided for the operator, making the device easier to hold and control throughout the alignment, clamping, and welding processes at the rebar lap joint. This effectively improves operational stability and ease of use, meets the needs of rapid handheld operation on construction sites, and further improves the overall construction efficiency of rebar welding.

[0028] Reference Figure 5 and Figure 6In a further embodiment of the present invention, the upper fitting component 100 has a central insertion hole 110 on its upper surface, and opening slots 120 with upper openings are provided on the left and right sides of the insertion hole 110; the upper end of the swing arm 200 has a horizontally extending horizontal section 210, which is embedded in the opening slot 120 and its end is embedded in the insertion hole 110, and the end of the horizontal section 210 embedded in the insertion hole 110 is provided with an outwardly expanding limiting head 211; the bottom of the handle rod 500 has a positioning shaft 510 for inserting into the insertion hole 110, and pressure blocks 520 are provided on the left and right sides of the positioning shaft 510, with the lower end of the pressure block 520 fitting against the outer surface of the horizontal section 210. It can be understood that the outer contour of the cross-section of the horizontal section 210 is circular, the bottom wall of the opening slot 120 is an arc surface, and the lower end of the pressure block 520 is also an arc surface. The lower end of the pressure block 520 and the bottom wall of the opening slot 120 define a circular hole for the horizontal section 210 to be rotated and installed. One end of the pressure block 520 facing the insertion hole 110 is fitted with one side of the outwardly expanding limiting head 211. The lower end of the positioning shaft 510 is provided with a downwardly protruding limiting protrusion 511, which is fitted with the other side of the outwardly expanding limiting head 211. Specifically, one side of the outwardly expanding limiting head 211 is fitted with the pressure block 520, and the other side is fitted with the limiting protrusion 511. The pressure block 520 and the limiting protrusion 511 form a limiting gap 521. The outwardly expanding limiting head 211 is embedded in the limiting gap 521 to achieve axial limiting, but does not affect the rotational movement. The insertion hole 110 on the upper bonding component 100 is positioned and engaged with the positioning shaft 510. The insertion hole 110 also provides a space for the outward expansion limiting head 211. The outward expansion limiting head 211, the pressure block 520 and the limiting protrusion 511 on the positioning shaft 510 form a multi-directional limiting engagement, which effectively limits the axial movement and loosening risk of the swing arm 200. The pressure block 520 and the opening groove 120 provide assembly space for the horizontal section 210 of the swing arm 200, so that the swing arm 200 can rotate smoothly around the horizontal axis. The above-mentioned multiple structural engagements ensure the rotational flexibility of the swing arm 200 while improving the overall structural reliability and long-term stability of the device.

[0029] Reference Figure 2 and Figure 3In a further embodiment of the present invention, the upper bonding component 100 includes a bonding block 130 and a connecting block 140. The bonding block 130 is used to bond with the reinforcing bar and can be made of corrosion-resistant and high-temperature resistant metal materials to meet the requirements of high-temperature working environment and long-term use in resistance welding. The insulating connecting block 140 can be made of insulating materials (such as ceramic or bakelite) or metal materials with an insulating coating on the surface to achieve reliable electrical isolation between the upper structure and the lower conductive parts, avoid safety hazards such as leakage and short circuit, and improve safety in use. The bonding block 130 is installed at the lower end of the connecting block 140, and the insertion hole 110 and the opening groove 120 are both formed in the connecting block 140. The upper bonding component 100 is configured as a separate structure of bonding block 130 and connecting block 140. Bonding block 130 directly contacts the first reinforcing bar 101, ensuring good conductivity and bonding and pressing effect to meet the requirements of resistance welding. Connecting block 140 achieves electrical isolation between the upper structure and the lower conductive parts, avoiding safety hazards such as leakage and short circuit, and improving the safety of the device. At the same time, the separate structure facilitates the individual replacement of worn parts, reduces maintenance costs, and extends the overall service life of the device. Of course, the handle rod 500 and the swing arm 200 can also be made of insulating materials (such as ceramic or bakelite) or metal materials with an insulating coating on the surface.

[0030] Understandably, to improve fit, the lower end face of the bonding block 130 and the upper end face of the lower bonding component 300 are arc surfaces, and the embedded steel bars in the arc surfaces also serve as a certain limiting effect. In addition, terminal blocks are provided at the center of the upper surface of the bonding block 130 and the bottom surface of the lower bonding component 300 for wire harness connection.

[0031] Reference Figure 2 and Figure 3 In a further embodiment of the present invention, the upper end of the fitting block 130 is provided with a plurality of connecting positioning rods 131, the upper end of the connecting positioning rods 131 is provided with a threaded shaft 132, the connecting block 140 is provided with a through hole 141 for inserting the connecting positioning rods 131, the upper end of the pressure block 520 is provided with a connecting strip 530 that fits against the upper surface of the connecting block 140; the connecting strip 530 is provided with a connecting hole 531 corresponding to the through hole 141, and the threaded shaft 132 extends out of the through hole 141 and the connecting hole 531 and is connected with a fastening nut. During installation, the threaded shaft 132 passes through the through hole 141 of the connecting block 140 and the connecting hole 531 of the connecting strip 530 and is locked by the fastening nut, realizing the integrated and stable connection of the fitting block 130, the connecting block 140, and the handle rod 500, ensuring the assembly accuracy of the three, while using the same fastener to fasten the three, making disassembly and assembly simple.

[0032] Reference Figure 3 and Figure 4In a further embodiment of the present invention, the swing arm 200 has a through first wire-passing hole 230 at its center, and a first wire-passing notch 231 on its peripheral wall. The handle rod 500 and the positioning shaft 510 have a through second wire-passing hole 540 at their centers, and a second wire-passing notch 541 on their peripheral wall. The first wire-passing hole 230 and the second wire-passing hole 540 converge and connect at the insertion hole 110. The first wire-passing hole 230 is provided inside the swing arm 200, and the second wire-passing hole 540 is provided inside the handle rod 500 and the positioning shaft 510. The convergence and connection of these two at the insertion hole 110 provides a built-in wiring channel for the resistance welding power cable, preventing the cable from being exposed or tangled, thus improving operational neatness. The first wire-passing notch 231 and the second wire-passing notch 541 facilitate quick cable insertion into the hole, reducing assembly difficulty. The built-in wiring effectively prevents the cable from being scratched, squeezed, or worn, improving electrical safety and device durability. At the same time, while achieving axial limiting, the limiting nut 222 can partially close the first wire passage notch 231 at the end of the swing arm 200, further constraining and protecting the wire harness passing through, preventing the wire harness from coming out of the end notch, and improving the reliability of the wiring and the safety of use.

[0033] Reference Figure 4 and Figure 7 In a further embodiment of the present invention, the lower end of the swing arm 200 is provided with an extension section 220, the extension direction of which is perpendicular to the horizontal section 210; the extension section 220 and the horizontal section 210 are connected by a vertically extending vertical section, which is perpendicular to both the extension section 220 and the horizontal section 210. The outer end of the extension section 220 is provided with a threaded section 221, and the bottom of the lower fitting member 300 is provided with a sleeve 310 fitted onto the extension section 220. The threaded section 221 is threadedly connected to a limit nut 222, and the extension section 220 is provided with an axial limiting block 223. The sleeve 310 is located between the axial limiting block 223 and the limit nut 222, thereby achieving axial limiting. The extension 220 at the lower end of the swing arm 200 provides an installation base for the sleeve 310 of the lower fitting 300. The axial limiting block 223 cooperates with the limiting nut 222 to form an axial limit on the sleeve 310. Of course, the sleeve 310 can also retain a certain range of axial movement between the axial limiting block 223 and the limiting nut 222, which can adaptively move slightly when clamping the steel bar, so that the lower fitting 300 and the surface of the steel bar can fit better, improving the uniformity of contact and welding stability.

[0034] Reference Figure 4 and Figure 7In a further embodiment of the present invention, the sleeve 310 has a notch 311 on its peripheral wall, and the extension section 220 has a limiting protrusion 224 embedded in the notch 311 on its peripheral wall. The sleeve 310 is rotatably fitted onto the extension section 220 and its rotation range is limited by the limiting protrusion 224. The limiting protrusion 224 on the extension section 220 is embedded in the notch 311 of the sleeve 310, which can effectively limit the free rotation angle and rotation range of the sleeve 310 and the lower bonding member 300, and prevent the lower bonding member 300 from excessively deflecting or misaligning during clamping, pressing, and welding. This further improves the alignment accuracy of the reinforcing bar and the stability of the welding quality, while retaining a certain rotation margin, so that the lower bonding member 300 can adaptively fine-tune the rotation angle within a reasonable range to adapt to the surface or placement angle of the reinforcing bar, making the lower bonding member 300 and the second reinforcing bar 102 fit more tightly and closely, further improving the contact uniformity and welding stability.

[0035] Reference Figure 2 and Figure 5 In some embodiments of the present invention, the bonding and pressure applying mechanism 400 includes a rotary motor 410 and a turbine 420. The output shaft of the rotary motor 410 is connected to a worm gear 411, and the turbine 420 is drivenly connected to the worm gear 411. Winding rods 421 are connected to both sides of the center of the turbine 420. The winding rods 421 are rotatably mounted on the upper bonding assembly 100 along their own horizontal axis. A take-up and release rope 422 is connected between the winding rod 421 and the swing arm 200. The bonding and pressure applying mechanism 400 uses a transmission structure where the rotary motor 410 drives the worm gear 411 and the turbine 420, driving the winding rod 421 to rotate and take up and release the take-up and release rope 422, thereby achieving electric control pressure application to the swing arm 200. The worm gear transmission has a self-locking function, which can control the clamping force and opening / closing state, resulting in uniform, stable, and highly consistent pressure application, reducing manual operation intensity and improving automation. To improve winding stability, a limiting protrusion 423 is provided at the outer end of the winding rod 421. Specifically, a bearing mounting seat is provided on the side of the connecting block 140. The bearing mounting seat has a semi-circular groove and a shaft cover is installed on the bearing mounting seat. The shaft cover and the bearing mounting seat form a hole for installing the bearing. The bearing is also sleeved on the winding rod 421, thereby reducing the rotational resistance of the winding rod 421.

[0036] Of course, in some other embodiments of the present invention, the bonding and pressure applying mechanism 400 is a tension spring, with one end connected to the upper bonding component 100 and the other end connected to the swing arm 200. By configuring the bonding and pressure applying mechanism 400 as a tension spring structure, the elasticity of the tension spring itself continuously applies a stable pre-tightening force to the swing arm 200. This design is simple, low-cost, and requires no additional power to maintain a continuous and tight fit between the lower bonding component 300 and the second reinforcing bar 102, and between the upper bonding component 100 and the first reinforcing bar 101. This improves the electrical contact stability between the device and the reinforcing bar, ensures uniform generation of resistance heat, and improves the quality of the welded joint.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A steel bar resistance welding device, characterized in that, include: The upper bonding component (100) is used for bonding the first reinforcing bar (101) at the bottom; The swing arm (200) is rotatably mounted on the left and right sides of the upper bonding assembly (100) along the horizontal axis; The lower bonding component (300) is connected to the swing arm (200) and is used to bond with the second reinforcing bar (102); The fitting and pressure application mechanism (400) is used to apply a pre-tightening force to the swing arm (200), the pre-tightening force being used to drive the swing arm (200) to bring the lower fitting piece (300) into contact with the second reinforcing bar (102).

2. The steel bar resistance welding device according to claim 1, characterized in that, It also includes a handle (500) which is mounted on the upper end of the upper bonding assembly (100).

3. The steel bar resistance welding device according to claim 2, characterized in that, The upper bonding component (100) has a socket (110) at the center of its upper end face, and the socket (110) has opening slots (120) with upper openings on both the left and right sides; the upper end of the swing arm (200) has a horizontally extending section (210) that extends horizontally to the left and right, the horizontal section (210) is embedded in the opening slot (120) and its end is embedded in the socket (110), and the end of the horizontal section (210) embedded in the socket (110) has an outwardly expanding limiting head (211); the bottom of the handle rod (500) is provided with A positioning shaft (510) with an insertion hole (110) is provided with pressure blocks (520) on the left and right sides of the positioning shaft (510). The lower end of the pressure block (520) is in contact with the outer surface of the horizontal section (210). The end of the pressure block (520) facing the insertion hole (110) is in contact with one side of the outward expansion limiting head (211). The lower end of the positioning shaft (510) is provided with a downward protruding limiting protrusion (511). The limiting protrusion (511) is in contact with the other side of the outward expansion limiting head (211).

4. The steel bar resistance welding device according to claim 3, characterized in that, The upper bonding component (100) includes a bonding block (130) and a connecting block (140). The bonding block (130) is installed at the lower end of the connecting block (140). The insertion hole (110) and the opening groove (120) are both formed on the connecting block (140).

5. The steel bar resistance welding device according to claim 4, characterized in that, The upper end of the bonding block (130) is provided with a plurality of connecting positioning rods (131), the upper end of the connecting positioning rods (131) is provided with a threaded shaft (132), the connecting block (140) is provided with a through hole (141) for the connecting positioning rods (131) to be inserted, the upper end of the pressure block (520) is provided with a connecting strip (530) that fits against the upper surface of the connecting block (140); the connecting strip (530) is provided with a connecting hole (531) corresponding to the through hole (141), the threaded shaft (132) extends out of the through hole (141) and the connecting hole (531) and is connected with a fastening nut.

6. The steel bar resistance welding device according to claim 4, characterized in that, The swing arm (200) has a through first wire hole (230) at its center, and a first wire notch (231) is provided on the periphery of the first wire hole (230). The handle rod (500) and the positioning shaft (510) have a through second wire hole (540) at their centers, and a second wire notch (541) is provided on the periphery of the second wire hole (540). The first wire hole (230) and the second wire hole (540) converge and connect at the insertion hole (110).

7. The steel bar resistance welding device according to claim 1, characterized in that, The lower end of the swing arm (200) is provided with an extension section (220), the extension direction of which is perpendicular to the horizontal section (210); the outer end of the extension section (220) is provided with a threaded section (221), the bottom of the lower fitting part (300) is provided with a sleeve (310) fitted onto the extension section (220), the threaded section (221) is threadedly connected to a limit nut (222), the extension section (220) is provided with an axial limit block (223), and the sleeve (310) is located between the axial limit block (223) and the limit nut (222).

8. The steel bar resistance welding device according to claim 7, characterized in that, The sleeve (310) has a notch (311) on its peripheral wall, and the extension section (220) has a limiting protrusion (224) that is embedded in the notch (311) on its peripheral wall. The sleeve (310) is rotatably sleeved on the extension section (220) and its rotation range is limited by the limiting protrusion (224).

9. The steel bar resistance welding device according to claim 1, characterized in that, The bonding and pressure mechanism (400) is a tension spring, one end of which is connected to the upper bonding component (100), and the other end is connected to the swing arm (200).

10. The steel bar resistance welding device according to claim 1, characterized in that, The bonding and pressure application mechanism (400) includes a rotary motor (410) and a turbine (420). The output shaft of the rotary motor (410) is connected to a worm gear (411). The turbine (420) is connected to the worm gear (411) in a transmission. Winding rods (421) are connected to both sides of the center of the turbine (420). The winding rods (421) are rotatably mounted on the upper bonding assembly (100) along their own horizontal axis. A winding rope (422) is connected between the winding rods (421) and the swing arm (200).

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