A double-point double-sided floating welding torch

Abstract

The present invention provides a double-point double-sided floating welding torch, which includes a first single-point welding mechanism, a second single-point welding mechanism, and a linear motion component. The first single-point welding mechanism is cooperatively installed with the second single-point welding mechanism through the linear motion component. Beneficial effects of the present invention: By connecting two single-point welding mechanisms through the linear motion component, welding can be carried out simultaneously at two positions, improving the problem of stress change caused by non-simultaneous welding between two points, enhancing the welding accuracy and working efficiency. Moreover, by adjusting the linear motion component, the distance between the two welding positions can be adjusted, enabling the welding torch to be applicable to more working scenarios.

Description

Technical Field

[0001] The present invention belongs to the field of welding equipment, and particularly relates to a double-point double-sided floating welding torch. Background Art

[0002] With the continuous development of the national automobile industry, the output of automobiles is increasing day by day. This puts forward higher requirements for the body welding technology of automobiles. There is an urgent need for high-beat, high-flexibility, and high-precision welding equipment to support high production capacity and high quality. Due to the requirements of welding processes and production beats, when many thin-plate parts complete one spot welding and then proceed to the next spot welding, certain stress deformations will occur, which will affect the welding accuracy. However, at present, the welding torch can only perform welding on one point, not only the welding accuracy cannot be guaranteed, but also the production efficiency of welding operations is limited to a certain extent. Summary of the Invention

[0003] In view of this, the present invention aims to provide a double-point double-sided floating welding torch to solve the problems that the welding accuracy of the current single-point welding torch cannot be guaranteed and the welding efficiency is low.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] A double-point double-sided floating welding torch includes a first single-point welding mechanism, a second single-point welding mechanism, and a linear motion component. The first single-point welding mechanism is cooperatively installed with the second single-point welding mechanism through the linear motion component.

[0006] Further, a frame is provided on the upper side of the first single-point welding mechanism. The first single-point welding mechanism is fixedly connected to the frame, and the second single-point welding mechanism is cooperatively installed with the frame through a slide rail.

[0007] Further, a flange is fixedly provided on the upper end surface of the frame.

[0008] Further, the linear motion component is one of a cylinder, a hydraulic cylinder, and an electric cylinder. The second single-point welding mechanism is fixedly connected to the cylinder body, and the first single-point welding mechanism is fixedly connected to the telescopic shaft. A limit component for limiting the stroke of the cylinder is provided on the second single-point welding mechanism. The limit component includes a limit bracket and a limit bolt. The limit bracket is fixedly connected to the second single-point welding mechanism. The limit bolt is installed on the side of the limit bracket, and the nut of the limit bolt corresponds to the side of the frame. The limit bolt is threadedly connected to the limit bracket.

[0009] Further, both the first single-point welding mechanism and the second single-point welding mechanism include a moving electrode, a stationary electrode, a connecting arm, a welding cylinder, and a mechanism bracket. The stationary electrode and the moving electrode are arranged coaxially and facing each other. The stationary electrode is fixedly connected to the connecting arm through a stationary electrode arm. An insulating pad is provided between the stationary electrode arm and the connecting arm. The connecting arm is fixedly connected to the welding cylinder housing. The moving electrode is fixedly connected to the main shaft of the welding cylinder through a moving electrode arm. An insulating pad is provided between the moving electrode arm and the main shaft of the welding cylinder. The connecting arm is cooperatively installed with the mechanism bracket; a floating assembly for the floating of the connecting arm is further provided between the connecting arm and the mechanism bracket; a transformer is provided on the bracket of the second single-point welding mechanism, and two levels of the output end of the transformer are electrically connected to the moving electrode arm and the stationary electrode arm of the first welding mechanism and the second single-point welding mechanism respectively.

[0010] Further, the floating assembly includes a mounting plate, a spring mounting bolt, a compression spring, a spring positioning block, a bolt bracket, and a floating cylinder. The bolt bracket and the floating cylinder are sequentially arranged on the side of the mounting plate away from the moving electrode arm. The mounting plate is provided with a mounting hole for mounting the compression spring, and a through hole communicating with the mounting hole is provided inside the end close to the floating cylinder. The inner diameter of the through hole matches the diameter of the spring mounting bolt. The diameter of the compression spring is larger than the diameter of the spring mounting bolt. The spring mounting bolt and the compression spring are both installed inside the mounting hole. Among them, the spring mounting bolt is installed inside the compression spring. A spring positioning block is provided at one end of the spring mounting bolt close to the mounting hole, and the other end is fixedly connected to the bolt bracket. The diameter of the spring positioning block is larger than the diameter of the compression spring. A through hole corresponding to the main shaft of the floating cylinder is provided inside the bolt bracket. The diameter of the through hole is larger than the diameter of the main shaft of the floating cylinder. A boss corresponding to the main shaft of the cylinder is provided at one end of the mounting plate close to the floating cylinder; the upper end of the mounting plate is cooperatively installed with the mechanism bracket through a linear guide rail, and the left end is fixedly connected to the connecting arm through a connecting plate. The bolt bracket and the floating cylinder are both fixedly connected to the mechanism bracket.

[0011] Further, a floating bolt corresponding to the main shaft of the floating cylinder is provided at one end of the boss close to the floating cylinder, and the floating bolt is threadedly connected to the boss.

[0012] Further, a through hole corresponding to the spring mounting bolt is provided on the bolt bracket, and the spring mounting bolt is installed inside the through hole; a groove is provided on the side of the spring positioning block, and a boss corresponding to the groove of the spring positioning block is provided inside the mounting hole of the mounting plate. The mounting plate and the spring positioning block are slidably connected through the boss. A threaded hole corresponding to the spring mounting bolt is provided inside one end of the spring positioning block close to the floating cylinder, and the spring mounting bolt is threadedly connected to the spring positioning block.

[0013] Further, a guiding assembly for guiding the moving electrode arm is provided below the welding cylinder. The guiding assembly includes a guiding rod and a guiding block. The guiding block is provided with a guiding hole in the main axis direction of the welding cylinder. A self-lubricating bearing is arranged inside the guiding hole. The outer side of the self-lubricating bearing is fixedly connected to the inner side of the guiding hole. The guiding rod is installed inside the self-lubricating bearing. The outer side of the guiding rod is slidably connected to the inner side of the self-lubricating bearing. One end of the guiding rod close to the moving electrode arm is fixedly connected to the moving electrode arm. The guiding block is fixedly connected to the connecting arm. An insulating pad is arranged between the guiding block and the connecting arm.

[0014] Further, a first proximity sensor and a second proximity sensor are arranged on the side surface of the end of the guiding rod away from the moving electrode arm. An induction block for sensor induction is arranged at the end of the guiding rod away from the moving electrode. The first proximity sensor and the second proximity sensor are fixedly connected to the housing of the welding cylinder through connecting pieces.

[0015] Compared with the prior art, the double-point double-sided floating welding torch of the present invention has the following beneficial effects:

[0016] (1) For the double-point double-sided floating welding torch of the present invention, two single-point welding mechanisms are connected through a linear motion assembly, and welding can be carried out at two positions simultaneously, improving the problem of stress change caused by non-simultaneous welding between two points, improving welding accuracy and working efficiency, and the distance between the two welding positions can be adjusted by adjusting the linear motion assembly, so that the welding torch is applicable to more working scenarios.

[0017] (2) For the double-point double-sided floating welding torch of the present invention, by setting a floating assembly, the grinding distance can be automatically compensated after electrode grinding, and the elastic force of the floating spring can be adjusted by tightening or loosening the spring installation bolt, and the floating distance can be adjusted by adjusting the floating bolt, realizing the automatic compensation function of the welding torch, so that the welding torch has a wider application range.

[0018] (3) For the double-point double-sided floating welding torch of the present invention, a guiding assembly is arranged on the moving electrode arm, which can not only prevent the main electrode arm from rotating radially, but also ensure the stability of the moving electrode during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 is a schematic structural diagram of the double-point double-sided floating welding torch according to the embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of the first single-point welding mechanism according to the embodiment of the present invention;

[0022] Figure 3 Explosion schematic diagram of the floating component structure according to the embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the guiding component structure according to the embodiment of the present invention;

[0024] Figure 5 Partial structure schematic diagram of the limiting component according to the embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the cross-sectional structure of the spring positioning block and the mounting plate according to the embodiment of the present invention.

[0026] Explanation of reference numerals:

[0027] 1 - First single-point welding mechanism; 2 - Second single-point welding mechanism; 3 - Frame; 4 - Flange; 5 - Slide rail; 6 - Linear motion component; 7 - Moving electrode; 8 - Static electrode; 9 - Moving electrode arm; 10 - Static electrode arm; 11 - Connecting arm; 12 - Floating component; 13 - Welding cylinder; 14 - Mechanism support; 15 - Mounting plate; 16 - Spring mounting bolt; 17 - Floating cylinder; 18 - Compression spring; 19 - Spring positioning block; 20 - Connecting plate; 21 - Linear guide rail; 22 - Bolt support; 23 - Floating bolt; 24 - Boss; 25 - Guide block; 26 - Guide rod; 27 - First proximity sensor; 28 - Second proximity sensor; 29 - Limiting support; 30 - Limiting bolt. Detailed implementation manners

[0028] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0029] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0030] As Figure 1 shown, a double-point double-sided floating welding gun of the present invention includes a first single-point welding mechanism 1, a second single-point welding mechanism 2, and a linear motion component 6. The first single-point welding mechanism 1 is cooperatively installed with the second single-point welding mechanism 2 through the linear motion component 6, and the first single-point welding mechanism 1 and the second single-point welding mechanism 2 are arranged in parallel. By connecting the two single-point welding mechanisms through the linear motion component 6, welding can be performed on two positions simultaneously, improving the problem of stress change caused by non-simultaneous welding between two points, improving the welding accuracy and working efficiency, and by adjusting the linear motion component 6, the distance between the two welding positions can be adjusted, enabling the welding gun to be applicable to more working environments. One of the single-point welding mechanisms can be fixed on the equipment or the robot arm for use.

[0031] Above the first single-point welding mechanism 1, there is a frame 3. The first single-point welding mechanism 1 is fixedly connected to the frame 3, and the second single-point welding mechanism 2 is installed in cooperation with the frame 3 through a slide rail 5. By setting the slide rail 5, the process of adjusting the welding spot spacing is more stable, improving the welding accuracy of the equipment during the welding process. On the upper end face of the frame 3, a flange 4 is fixedly provided, which can fix the welding torch on an industrial robot or other equipment, broadening the usage scenarios of the welding torch.

[0032] As Figure 5 shown, the linear motion component 6 is one of a cylinder, a hydraulic cylinder, and an electric cylinder. The second single-point welding mechanism 2 is fixedly connected to the cylinder block, and the first single-point welding mechanism 1 is fixedly connected to the telescopic shaft. In this embodiment, the linear motion component 6 uses a cylinder. On the second single-point welding mechanism 2, a limit component for limiting the stroke of the cylinder is provided. The limit component includes a limit bracket 29 and a limit bolt 30. The limit bracket 29 is fixedly connected to the second single-point welding mechanism 2. The limit bolt 30 is installed on the side of the limit bracket 29, and the nut of the limit bolt 30 corresponds to the side of the frame 3. The limit bolt 30 is threadedly connected to the limit bracket 29. When the cylinder is supplied with positive air pressure, the main shaft of the cylinder extends axially to the maximum stroke, and at this time, the distance between the two welding spots is the longest. When the cylinder is supplied with reverse air pressure, the main shaft of the cylinder contracts axially, and the limit bolt 30 will abut against the side of the frame 3 for limiting, and at this time, the distance between the two welding spots is the shortest. By adjusting the relative position between the limit bolt 30 and the limit bracket 29, the shortest distance between the two welding spots can be adjusted. Using a cylinder as the linear motion component 6 has the advantages of low cost, convenient maintenance, and stable and reliable operation process. The cylinder is connected to the controller through a driver. The controller can be the controller of the welding torch alone or the controller of the robotic arm used in cooperation with the welding torch.

[0033] As Figure 2As shown, both the first single-point welding mechanism 1 and the second single-point welding mechanism 2 include a moving electrode 7, a stationary electrode 8, a connecting arm 11, a welding cylinder 13, and a mechanism support 14. The stationary electrode 8 and the moving electrode 7 are arranged coaxially and facing each other. The stationary electrode 8 is fixedly connected to the connecting arm 11 through a stationary electrode arm 10. An insulating pad is provided between the stationary electrode arm 10 and the connecting arm 11. The connecting arm 11 is fixedly connected to the housing of the welding cylinder 13. The moving electrode 7 is fixedly connected to the main shaft of the welding cylinder 13 through a moving electrode arm 9. An insulating pad is provided between the moving electrode arm 9 and the main shaft of the welding cylinder 13. The connecting arm 11 is fitted and installed with the mechanism support 14; a floating component 12 for the connecting arm 11 is further provided between the connecting arm 11 and the mechanism support 14; a transformer is provided on the support of the second single-point welding mechanism 2. Two levels of the output end of the transformer are electrically connected to the moving electrode arm 9 and the stationary electrode arm 10 of the first single-point welding mechanism 1 and the second single-point welding mechanism 2 respectively. During the actual welding operation, the stationary electrode 8 is pressed against the component to be welded on one side, and then the welding cylinder 13 is driven. The main shaft of the welding cylinder 13 drives the moving electrode 7 to press against the component to be welded on both sides. Then, the transformer is controlled to supply power to the electrodes to complete double-point welding. After welding, the main shaft of the welding cylinder 13 contracts, and the moving electrode 9 disengages from the component to be welded. The first single-point welding mechanism 1 and the second single-point welding mechanism 2 are powered by a set of transformer systems, making the voltage and current during the welding process closer, ensuring the consistency of the welding process of the two solder joints, and thus improving the welding quality of the solder joints. The welding cylinder 13 is connected to the controller through a driver. The control can be the controller of the welding torch alone or the controller of the robotic arm used in cooperation with the welding torch.

[0034] As Figure 3As shown in the figure, the floating component 12 includes a mounting plate 15, a spring mounting bolt 16, a compression spring 18, a spring positioning block 19, a bolt bracket 22, and a floating cylinder 17. The bolt bracket 22 and the floating cylinder 17 are sequentially arranged on the side of the mounting plate 15 away from the moving electrode arm 9. The mounting plate 15 is provided with a mounting hole for mounting the compression spring 18, and a through hole communicating with the mounting hole is provided inside the end close to the floating cylinder 17. The inner diameter of the through hole matches the diameter of the spring mounting bolt 16. The diameter of the compression spring 18 is larger than the diameter of the spring mounting bolt 16. Both the spring mounting bolt 16 and the compression spring 18 are installed inside the mounting hole. Among them, the spring mounting bolt 16 is installed inside the compression spring 18. A spring positioning block 19 is provided at one end of the spring mounting bolt 16 close to the mounting hole, and the other end is fixedly connected to the bolt bracket 22. The diameter of the spring positioning block 19 is larger than the diameter of the compression spring 18. The bolt bracket 22 is provided with a through hole corresponding to the main shaft of the floating cylinder 17, and the diameter of the through hole is larger than the diameter of the main shaft of the floating cylinder 17. A boss 24 corresponding to the cylinder main shaft is provided at one end of the mounting plate 15 close to the floating cylinder 17; the upper end of the mounting plate 15 is cooperatively installed with the mechanism bracket 14 through a linear guide rail 21, and the left end is fixedly connected to the connecting arm 11 through a connecting plate 20. Both the bolt bracket 22 and the floating cylinder 17 are fixedly connected to the mechanism bracket 14. Before welding, the main shaft of the floating cylinder 17 extends, and the main shaft penetrates through the through hole on the bolt bracket 22 and presses against the boss 24. At this time, the mounting plate 15 moves towards the moving electrode 7, and the compression spring 18 is compressed. The moving electrode 7, the static electrode 8 and their connecting components move forward as a whole. When the welding torch reaches the designated position, the main shaft of the floating cylinder 17 contracts. Under the rebound effect of the compression spring 18, the moving electrode 7, the static electrode 8 and their connecting components move backward as a whole. At this time, the static electrode 8 will press against the component to be welded, and there is no need to manually move the welding torch to make the static electrode 8 press against the component to be welded. This not only improves the welding efficiency, but also ensures that the welding torch does not shake during the process of moving the welding torch. In addition, when the welding torch has been used for a long time and the length of the static electrode 8 is shortened after being ground, the floating component 12 can provide floating compensation for the electrode, thereby ensuring the normal use of the welding torch. The floating cylinder 17 is connected to the controller through a driver. The control can be the controller of the welding torch alone or the controller of the robotic arm used in conjunction with the welding torch.

[0035] A floating bolt 23 corresponding to the main shaft of the floating cylinder 17 is provided at one end of the boss 24 close to the floating cylinder 17. The floating bolt 23 is threadedly connected to the boss 24. By loosening or tightening the floating bolt 23, the relative position between the nut of the floating bolt 23 and the boss 24 can be changed. The main shaft stroke of the floating cylinder 17 is fixed. If the distance between the floating nut and the boss 24 changes, the floating distance will change accordingly. Adjusting the floating distance of the floating component 12 can enable the welding torch to obtain a wider range of use scenarios.

[0036] The bolt bracket 22 is provided with through holes corresponding to the spring mounting bolts 16, and the spring mounting bolts 16 are installed inside the through holes; the side of the spring positioning block 19 is provided with grooves, and the inner side of the mounting hole of the mounting plate 15 is provided with bosses 24 corresponding to the grooves of the spring positioning block. The mounting plate 15 is slidably connected to the spring positioning block 19 through the bosses 24. A threaded hole corresponding to the spring mounting bolt 16 is provided inside one end of the spring positioning block 19 close to the floating cylinder 17, and the spring mounting bolt 16 is threadedly connected to the spring positioning block 19. Since the grooves of the spring positioning block 19 cooperate with the bosses 24 of the mounting holes, the spring positioning block 19 will not rotate due to the rotation of the spring mounting bolts 16. By tightening or loosening the spring mounting bolts 16, the distance between the nut and the spring positioning block 19 can be changed, and the length of the compression spring 18 will also change. At this time, the elastic force of the compression spring 18 will also change accordingly. Adjusting the elastic force of the compression spring 18 can change the pressure of the static electrode 8 on the component to be welded, and can enable the welding torch to have a wider application scenario.

[0037] As Figure 4 shown, a guiding assembly for guiding the moving electrode arm 9 is provided below the welding cylinder 13. The guiding assembly includes a guiding rod 26 and a guiding block 25. The guiding block 25 is provided with a guiding hole in the main axis direction of the welding cylinder 13. A self-lubricating bearing is provided inside the guiding hole, and the outer side of the self-lubricating bearing is fixedly connected to the inner side of the guiding hole. The guiding rod 26 is installed inside the self-lubricating bearing, and the outer side of the guiding rod 26 is slidably connected to the inner side of the self-lubricating bearing. One end of the guiding rod 26 close to the moving electrode arm 9 is fixedly connected to the moving electrode arm 9, the guiding block 25 is fixedly connected to the connecting arm 11, and an insulating pad is provided between the guiding block 25 and the connecting arm 11. The cooperation between the guiding rod 26 and the guiding block 25 can not only prevent the moving electrode 7 from rotating radially, but also the cooperation between the guiding rod 26 and the self-lubricating bearing can ensure the accuracy of the linear movement of the moving electrode 7.

[0038] On the side of the end of the guiding rod 26 away from the moving electrode arm 9, a first proximity sensor 27 and a second proximity sensor 28 are provided. An induction block for sensor induction is provided at the end of the guiding rod 26 away from the moving electrode 7. The first proximity sensor 27 and the second proximity sensor 28 are fixedly connected to the housing of the welding cylinder 13 through a connecting member. The first proximity sensor 27 and the second proximity sensor 28 are electrically connected to a controller. The controller can be a separate controller of the welding torch or a controller of the robotic arm used in cooperation with the welding torch. The first proximity sensor 27 and the second proximity sensor 28 are photoelectric proximity sensors, and the photoelectric proximity sensors can only sense the induction block and send signals to the controller. When the welding cylinder 13 is in the non-extended state, the second proximity sensor 28 can sense the induction block, and the controller receives the signal of the second proximity sensor 28. At this time, the welding torch can move. When the welding cylinder 13 is in the extended state, the first proximity sensor 27 can sense the induction block, and the controller receives the signal of the first proximity sensor 27. At this time, the welding torch cannot move. The position of the cylinder can be monitored through the sensors to ensure the smoothness and safety of the welding process. The above-mentioned controller uses but is not limited to the existing PLC controller. The above-mentioned PLC controller, the first proximity sensor 27 and the second proximity sensor 28 are all prior arts and will not be elaborated here.

[0039] During the actual use process of this embodiment, the welding torch is installed on an industrial robot. After determining that the welding cylinder 13 is in the contracted state, the main shaft of the floating cylinder 17 extends, and components such as the moving electrode 7 and the static electrode 8 move forward. The welding torch is moved to the designated position. When the welding torch reaches the designated position, the main shaft of the floating cylinder 17 contracts. Under the rebound effect of the compression spring 18, the moving electrode 7, the static electrode 8 and their connection components move backward as a whole. At this time, the static electrode 8 will press the component to be welded. Without manually moving the welding torch, the static electrode 8 can press the component to be welded. This not only improves the welding efficiency, but also ensures that the welding torch does not shake during the movement of the welding torch. The main shaft of the welding cylinder 13 drives the moving electrode 7 to double-sidedly press the component to be welded, and then the transformer is controlled to supply power to the electrode to complete the double-point welding. After the welding is completed, the main shaft of the welding cylinder 13 contracts, and the moving electrode 7 disengages from the component to be welded. The main shaft of the floating cylinder 17 extends, the static electrode 8 disengages from the welded component, and the welding torch is moved to weld the next part.

[0040] Those of ordinary skill in the art can realize that the units and method steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0041] In several embodiments provided in the present application, it should be understood that the disclosed methods and systems can be implemented in other ways. For example, the above-mentioned division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. The above-mentioned units may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present invention.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

[0043] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-point double-sided floating welding torch, characterized in that: it includes a first single-point welding mechanism (1), a second single-point welding mechanism (2), and a linear motion component (6). The first single-point welding mechanism (1) is cooperatively installed with the second single-point welding mechanism (2) through the linear motion component (6); both the first single-point welding mechanism (1) and the second single-point welding mechanism (2) include a moving electrode (7), a static electrode (8), a connecting arm (11), a welding cylinder (13), and a mechanism bracket (14); the static electrode (8) and the moving electrode (7) are coaxially arranged facing each other; a floating component (12) for the floating of the connecting arm (11) is further provided between the connecting arm (11) and the mechanism bracket (14); the floating component (12) includes a mounting plate (15), a spring mounting bolt (16), a compression spring (18), a spring positioning block (19), a bolt bracket (22), and a floating cylinder (17). The bolt bracket (22) and the floating cylinder (17) are sequentially arranged on the side of the mounting plate (15) away from the moving electrode arm (9). The mounting plate (15) is provided with a mounting hole for mounting the compression spring (18), and a through hole communicating with the mounting hole is provided inside the end close to the floating cylinder (17). The inner diameter of the through hole matches the diameter of the spring mounting bolt (16). The diameter of the compression spring (18) is larger than the diameter of the spring mounting bolt (16). Both the spring mounting bolt (16) and the compression spring (18) are installed inside the mounting hole. Among them, the spring mounting bolt (16) is installed inside the compression spring (18). A spring positioning block (19) is provided at one end of the spring mounting bolt (16) close to the mounting hole, and the other end is fixedly connected to the bolt bracket (22). The diameter of the spring positioning block (19) is larger than the diameter of the compression spring (18). A through hole corresponding to the main shaft of the floating cylinder (17) is provided inside the bolt bracket (22). The diameter of the through hole is larger than the diameter of the main shaft of the floating cylinder (17). A boss (24) corresponding to the cylinder main shaft is provided at one end of the mounting plate (15) close to the floating cylinder (17). The upper end of the mounting plate (15) is cooperatively installed with the mechanism bracket (14) through a linear guide rail (21), and the left end is fixedly connected to the connecting arm (11) through a connecting plate (20). Both the bolt bracket (22) and the floating cylinder (17) are fixedly connected to the mechanism bracket (14); a floating bolt (23) corresponding to the main shaft of the floating cylinder (17) is provided at one end of the boss (24) close to the floating cylinder (17), and the floating bolt (23) is threadedly connected to the boss (24); The bolt bracket (22) is provided with through holes corresponding to the spring mounting bolts (16), and the spring mounting bolts (16) are installed inside the through holes; the side surface of the spring positioning block (19) is provided with grooves, and the mounting plate (15) is provided with bosses corresponding to the grooves of the spring positioning block (19) inside the mounting holes. The mounting plate (15) is slidably connected to the spring positioning block (19) through the bosses. A threaded hole corresponding to the spring mounting bolt (16) is provided inside one end of the spring positioning block (19) close to the floating cylinder (17), and the spring mounting bolt (16) is threadedly connected to the spring positioning block (19).

2. A double-point double-sided floating welding torch according to claim 1, characterized in that: A frame (3) is provided above the first single-point welding mechanism (1), the first single-point welding mechanism (1) is fixedly connected to the frame (3), and the second single-point welding mechanism (2) is cooperatively installed with the frame (3) through a slide rail (5).

3. A double-point double-sided floating welding torch according to claim 2, characterized in that: A flange plate (4) is fixedly provided on the upper end surface of the frame (3).

4. A double-point double-sided floating welding torch according to claim 2, characterized in that: The linear motion assembly (6) is one of a cylinder, a hydraulic cylinder, and an electric cylinder.

5. A double-point double-sided floating welding torch according to claim 4, characterized in that: The linear motion assembly (6) is a cylinder. The second single-point welding mechanism (2) is fixedly connected to the cylinder body, and the first single-point welding mechanism (1) is fixedly connected to the telescopic shaft; a limit assembly for limiting the stroke of the cylinder is provided on the second single-point welding mechanism (2). The limit assembly includes a limit bracket (29) and a limit bolt (30). The limit bracket is fixedly connected to the second single-point welding mechanism (2). The limit bolt (30) is installed on the side surface of the limit bracket (29), and the nut of the limit bolt (30) corresponds to the side surface of the frame (3). The limit bolt (30) is threadedly connected to the limit bracket (29).

6. A double-point double-sided floating welding torch according to claim 1, characterized in that: The static electrode (8) is fixedly connected to the connecting arm (11) through the static electrode arm (10). An insulating pad is provided between the static electrode arm (10) and the connecting arm (11). The connecting arm (11) is fixedly connected to the housing of the welding cylinder (13). The moving electrode (7) is fixedly connected to the main shaft of the welding cylinder (13) through the moving electrode arm (9). An insulating pad is provided between the moving electrode arm (9) and the main shaft of the welding cylinder (13). The connecting arm (11) is cooperatively installed with the mechanism bracket (14); A transformer is provided on the bracket of the second single-point welding mechanism (1). Two levels of the output end of the transformer are electrically connected to the moving electrode arm (9) and the static electrode arm (10) of the first spot welding mechanism (2) and the second single-point welding mechanism (1) respectively.

7. A double-point double-sided floating welding torch according to claim 1, characterized in that: Below the described welding cylinder (13), there is a guiding assembly for guiding the moving electrode arm (9). The guiding assembly includes a guiding rod (26) and a guiding block (25). The guiding block (25) is provided with a guiding hole in the main axis direction of the welding cylinder (13). A self-lubricating bearing is arranged inside the guiding hole. The outer side of the self-lubricating bearing is fixedly connected to the inner side of the guiding hole. The guiding rod (26) is installed inside the self-lubricating bearing. The outer side of the guiding rod (26) is slidably connected to the inner side of the self-lubricating bearing. One end of the guiding rod (26) close to the moving electrode arm (9) is fixedly connected to the moving electrode arm (9). The guiding block (25) is fixedly connected to the connecting arm (11). An insulating pad is arranged between the guiding block (25) and the connecting arm (11).

8. A double-point double-sided floating welding torch according to claim 7, characterized in that: On the side surface of one end of the guiding rod (26) away from the moving electrode arm (9), there are a first proximity sensor (27) and a second proximity sensor (28). At one end of the guiding rod (26) away from the moving electrode (7), there is an induction block for the sensor to sense. The first proximity sensor (27) and the second proximity sensor (28) are fixedly connected to the housing of the welding cylinder (13) through connecting pieces.

Images