Selective heating module for tray welding

Abstract

The utility model relates to the technical field of tray welding heating modules, in particular to a tray welding selective heating module which comprises a heating module body, a moving device, a welding device body and a conveying device. The heating module body is located on the back face in the welding device body. The heating module body, the proximity sensor, the visual sensor, the sliding moving assembly, the electric push rod and other parts are arranged, the proximity sensor and the visual sensor are used for detecting the tray position and the welding point, and the sliding moving assembly drives the heating module body to move to be matched with the electric push rod to adjust the position of the tray heating point. And the heating module body can precisely and selectively heat the welding points through instructions of the controller, and the effects that the device can precisely heat the welding points of the tray through detection and mechanical adjustment, and energy waste and tray damage are avoided are achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of pallet welding heating modules, specifically to a selective heating module for pallet welding. Background Technology

[0002] In welding operations, a pallet serves as a support carrier to heat the welding area of ​​the workpiece. Through methods such as electric heating or flame heating, the welding material is brought to a molten or plastic state, promoting interatomic bonding and forming a strong weld. It is commonly used in metal processing, electronic component packaging, and other fields to improve welding efficiency and quality.

[0003] Utility model patent CN222370748U discloses a pallet hot-melt welding device, including a conveyor conveying a pallet body. An operating frame is located in the middle of the conveyor, and a hot-melt assembly is located at the rear end of the operating frame. A hot-melt block is mounted on the hot-melt assembly. A conveyor platform is located inside the front end of the operating frame, with multiple conveyor rollers rotatably connected inside the platform. Movable blocks are located on both the upper and lower sides of the conveyor platform, and two clamping mechanisms are symmetrically arranged on each movable block. A first hydraulic cylinder is symmetrically mounted on the inner wall of the front end of the operating frame via a mounting base. The piston rod of the first hydraulic cylinder is connected and fixed to the outer wall of the movable block. Sliding rods are slidably connected to the four corners of the movable block. Two cleaning components are symmetrically arranged in the middle of the operating frame. This device improves the positioning accuracy during pallet body welding, enhances the weld's strength and sealing, improves welding effect and efficiency, and makes continuous welding and use of the pallet body more convenient.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Existing welding devices require heating the welding points via heating modules. When welding different trays, the heating module position needs to be changed accordingly for each tray, causing inconvenience in actual use and affecting welding efficiency. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a selective heating module for tray welding, which can effectively solve the problem that when the welding device is welding different trays, the heating module position needs to be changed accordingly due to the change of trays, which causes inconvenience in actual use and affects welding efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a selective heating module for pallet welding, including a heating module body, a moving device, a welding device body, and a conveying device. The conveying device is installed on the front side of the bottom of the welding device body. The heating module bodies are located on the back side inside the welding device body. Several heating module bodies are arranged at equal intervals. A mounting plate is provided on the rear side of the inner wall of the welding device body. Three sets of mounting plates are arranged at equal intervals.

[0008] A heating detection component is provided at the bottom of the heating module body. The heating detection component includes proximity sensors, the number of which corresponds to the number of heating module bodies. A vision sensor is provided at the bottom of the heating module body. There are four sets of vision sensors, which are evenly distributed at the bottom of the heating module body. The vision sensors are mounted on the bottom of the mounting plate. The proximity sensors are electrically connected to a controller via wires. The controller is electrically connected to the vision sensors via wires. A sliding moving component is provided on the outer side of the mounting plate.

[0009] The above scheme involves conveying a pallet via a conveyor, then moving the mounting plate via a connected structure. Proximity and vision sensors detect the welding points on the pallet. The controller activates the corresponding heating module body for heating based on the detection signals. Additionally, if necessary, the sliding moving component can be controlled to adjust the lateral position of the heating module body, aligning it with the target welding point for selective heating. This avoids energy waste and pallet damage caused by full-area heating, while improving welding efficiency and accuracy.

[0010] Furthermore, the sliding moving component includes a moving groove, the heating module body is located inside the moving groove, a sliding plate is installed on the inner side of the heating module body, a spring is installed on the inner side of the sliding plate, a moving electromagnetic block is installed on the other end of the spring, the moving electromagnetic block is magnetically connected to the sliding plate, a positioning electromagnetic block is installed on the outer side of the inner wall of the moving groove, a plurality of positioning electromagnetic blocks are provided, and the plurality of positioning electromagnetic blocks are arranged at equal distances, the positioning electromagnetic blocks are magnetically connected to the sliding plate, and the controller is electrically connected to the moving electromagnetic blocks and the positioning electromagnetic blocks through wires.

[0011] Through the above scheme, the controller controls the on / off state of the moving electromagnetic block and the positioning electromagnetic block. When it is necessary to adjust the position of the heating module body, the moving electromagnetic block is energized to attract and drive the module to slide along the moving groove. After reaching the target position, the corresponding positioning electromagnetic block is energized to attract and fix the slider, thereby fixing the heating module body. This realizes the rapid switching and precise positioning of the heating module body position, solving the problem of frequent module replacement when welding different trays.

[0012] Furthermore, electric push rods are provided at the four corners of the rear side of the inner wall of the welding device body. The output end of the electric push rod is installed on the outer side of the top of the two sets of external mounting plates. A movable plate is installed at the bottom of the electric push rod. The middle mounting plate of the three sets is installed inside the movable plate. The outer side of the movable plate is installed on the inner side of the movable device.

[0013] With the above scheme, the electric push rod moves the mounting plate and heating module body connected to it through the telescopic movement. The moving plate can move the electric push rod and the mounting plate when the moving device moves, so that the heating module body moves between the welding position of the welding device body and the conveying device, and heats the tray and the parts that need to be welded together.

[0014] Furthermore, a support rod is installed on the outer side of the heating module body, a positioning groove is opened on the outer side of the inner wall of the moving groove, the surface of the support rod is located inside the positioning groove, an electromagnetic lock is installed on the inner side of the top of the inner wall of the positioning groove, a locking hole is opened on the top of the support rod, several locking holes are provided, and the several locking holes are arranged at equal distances, the electromagnetic lock locks the support rod through the locking holes, and the controller is electrically connected to the electromagnetic lock through a wire.

[0015] With the above solution, after the heating module body moves to the target position, the controller controls the electromagnetic lock to be energized, and the locking tongue is inserted into the locking hole of the support rod. The mechanical locking ensures that the module remains stable during the welding process. After the power is cut off, the electromagnetic lock is released, and the support rod can move freely, realizing the mechanical locking and quick unlocking of the heating module body position, and improving the reliability during use.

[0016] Furthermore, a central box is installed on the outside of the heating module body, and a heat insulation plate is installed on the outside of the central box.

[0017] Through the above solution, the central box concentrates the heat generated by the heating module body and directs it to the welding point. The heat insulation plate prevents the heat from being conducted to nearby components, avoiding the impact of high temperature on their performance. At the same time, it can concentrate the heat, realize the directional conduction of heat and heat insulation protection, improve heating efficiency and extend the equipment life.

[0018] Furthermore, a mounting block is installed at the bottom of the heating module body, the proximity sensor is installed at the bottom of the mounting block, and positioning holes are opened on both sides of the outer side of the mounting plate. A positioning rod is movably connected inside the positioning hole, and the outer side of the positioning rod is installed with the outer side of the inner wall of the moving plate.

[0019] Through the above scheme, the mounting block ensures that the proximity sensor and the tray maintain a fixed detection distance, and the positioning rod and positioning groove cooperate to limit the lateral sway of the mounting plate, so as to achieve accurate positioning and stable movement of the mounting plate and avoid detection errors or heating position deviations caused by mechanical shaking.

[0020] Furthermore, a sliding groove is provided on the outer side of the inner wall of the movable groove, and a slider is slidably connected inside the sliding groove. The inner side of the slider is installed with the outer side of the heating module body.

[0021] With the above scheme, the slider slides along the groove, providing rigid guidance for the movement of the heating module body, reducing friction and shaking during the movement, realizing smooth movement and high-precision positioning of the heating module body, and improving the motion reliability of the device.

[0022] Furthermore, a connecting groove is provided at the bottom of the mounting plate, the connecting groove corresponds to the moving groove, the heating module body is located at the top of the connecting groove, and a protective box is installed on the outside of the controller, the protective box is installed on the back of the welding device body.

[0023] Through the above scheme, the heat generated by the heating module body can easily pass through the connecting slot to heat the components at the bottom that need to be heated. The protective box provides physical protection for the controller, ensuring its stable operation in complex industrial environments, and realizing the unimpeded movement of the heating module body and the reliable operation of the control system. Beneficial effects

[0024] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0025] I. This utility model, by setting up a heating module body, a proximity sensor, a vision sensor, a sliding moving component, an electric push rod, and other components, uses the proximity sensor and vision sensor to detect the position of the tray and the welding point. The sliding moving component drives the heating module body to move, and the electric push rod works together to adjust the position of the heating point on the tray. This allows the heating module body to selectively heat the welding point precisely through controller commands. This achieves the effect of the device being able to accurately heat the welding point of the tray through detection and mechanical adjustment, avoiding energy waste and damage to the tray.

[0026] II. This utility model, by setting up components such as a movable electromagnetic block, a positioning electromagnetic block, an electromagnetic lock, a support rod, a slide groove, and a slider, achieves rapid movement of the heating module body through the electromagnetic drive of the movable electromagnetic block and the positioning electromagnetic block, mechanical locking of the electromagnetic lock and the locking hole of the support rod, and rigid guidance of the slide groove and the slider. This allows the heating module body to quickly switch positions and be stably fixed through a dual mechanism of electromagnetic and mechanical coordination, achieving the effect of rapid adaptation and reliable locking of the heating module body position according to different tray welding requirements. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the present invention;

[0029] Figure 2 This is a rear-view split diagram of the present invention;

[0030] Figure 3 This is a partial schematic diagram of the present invention;

[0031] Figure 4 This is a partial disassembled schematic diagram of the present invention;

[0032] Figure 5 For the present utility model Figure 4 Enlarged view of point A in the middle;

[0033] Figure 6 This is a cross-sectional view of the mounting plate of this utility model.

[0034] Reference numerals: 1. Heating module body; 2. Moving device; 3. Welding device body; 4. Conveying device; 5. Mounting plate; 6. Heating detection component; 61. Proximity sensor; 62. Vision sensor; 63. Controller; 7. Sliding moving component; 71. Moving groove; 72. Slide plate; 73. Spring; 74. Moving electromagnetic block; 75. Positioning electromagnetic block; 8. Electric push rod; 9. Moving plate; 10. Support rod; 11. Positioning groove; 12. Electromagnetic lock; 13. Locking hole; 14. Central box; 15. Insulation plate; 16. Mounting block; 17. Positioning hole; 18. Positioning rod; 19. Slide groove; 20. Sliding block; 21. Connecting groove; 22. Protective box. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0036] The present invention will be further described below with reference to the embodiments.

[0037] See attached document Figure 1-6 A selective heating module for pallet welding includes a heating module body 1, a moving device 2, a welding device body 3, and a conveying device 4. The conveying device 4 is installed on the front side of the bottom of the welding device body 3 and is used to convey the pallet to the welding area. The heating module body 1 is located on the back side inside the welding device body 3. Several heating module bodies 1 are provided and are arranged at equal intervals. The heating module body 1 is used to selectively heat the welding points of the pallet. A mounting plate 5 is provided on the rear side of the inner wall of the welding device body 3. Three sets of mounting plates 5 are provided and are arranged at equal intervals. The mounting plates 5 are used to mount the heating module bodies 1.

[0038] A heating detection component 6 is provided at the bottom of the heating module body 1. The heating detection component 6 includes a proximity sensor 61, the number of which corresponds to the number of heating module body 1. A vision sensor 62 is provided at the bottom of the heating module body 1. There are four sets of vision sensors 62, which are evenly distributed at the bottom of the heating module body 1. The vision sensors 62 are mounted on the bottom of the mounting plate 5. The proximity sensors 61 are electrically connected to a controller 63 via wires. The controller 63 is electrically connected to the vision sensors 62 via wires. A sliding moving component 7 is provided on the outer side of the mounting plate 5. The proximity sensors 61 are used to detect the protruding welding points on the tray. The vision sensors 62 are used to detect whether the position of the welding points corresponds to the heating module body 1. The controller 63 is used to control other structures and start the heating module body 1 based on the detection of the proximity sensors 61 and the vision sensors 62. The proximity sensors 61, vision sensors 62, and controller 63 are all prior art.

[0039] The sliding moving component 7 includes a moving groove 71. The heating module body 1 is located inside the moving groove 71, which facilitates the movement of the heating module body 1. A sliding plate 72 is installed on the inner side of the heating module body 1, and a spring 73 is installed on the inner side of the sliding plate 72. A moving electromagnetic block 74 is installed on the other end of the spring 73. The moving electromagnetic block 74 is magnetically connected to the sliding plate 72, and can magnetically attract the sliding plate 72 to move and adjust its position. A positioning electromagnetic block 75 is installed on the outer side of the inner wall of the moving groove 71. Several positioning electromagnetic blocks 75 are arranged at equal intervals and are magnetically connected to the sliding plate 72. The sliding plate 72 can slide in the moving groove 71 and is simultaneously magnetically attracted and fixed by the moving electromagnetic block 74 and the positioning electromagnetic block 75. The positioning electromagnetic block 75 can magnetically attract and fix the sliding plate 72. The controller 63 guides... The wire is electrically connected to the movable electromagnetic block 74 and the positioning electromagnetic block 75. Electric push rods 8 are provided at the four corners of the rear side of the inner wall of the welding device body 3. The output end of the electric push rod 8 is installed on the outer side of the top of the two sets of external mounting plates 5. A movable plate 9 is installed at the bottom of the electric push rod 8. The electric push rod 8 is used to push the two outermost mounting plates 5 of the three sets. The middle mounting plate 5 of the three sets is installed inside the movable plate 9. The middle mounting plate 5 is fixed inside the movable plate 9 and does not need to move. The outer side of the movable plate 9 is installed on the inner side of the moving device 2. The moving device 2 can be driven by the movable plate 9 to move its connected structure and heating module body 1 between the welding device body 3 and the conveying device 4. After welding at the heating tray, the heating module body 1 is reset and moved. The movable electromagnetic block 74, the positioning electromagnetic block 75, and the electric push rod 8 are all prior art.

[0040] A support rod 10 is installed on the outer side of the heating module body 1. A positioning groove 11 is opened on the outer side of the inner wall of the moving groove 71. The surface of the support rod 10 is located inside the positioning groove 11. An electromagnetic lock 12 is installed on the inner side of the top of the inner wall of the positioning groove 11. A locking hole 13 is opened on the top of the support rod 10. Several locking holes 13 are provided and are arranged at equal intervals. The electromagnetic lock 12 locks the support rod 10 through the locking holes 13. The controller 63 controls the electromagnetic lock 12 to lock when energized or release when de-energized, realizing the mechanical locking and quick unlocking of the position of the heating module body 1. The controller 63 is electrically connected to the electromagnetic lock 12 through a wire. A heat collection box 14 is installed on the outer side of the heating module body 1. The heat collection box 14 is used to collect heat and concentrate it to the welding point. A heat insulation plate 15 is installed on the outer side of the heat collection box 14. The heat insulation plate 15 is used to block heat diffusion and improve the efficiency of the welding point. For concentrated heat, a mounting block 16 is installed at the bottom of the heating module body 1, and a proximity sensor 61 is installed at the bottom of the mounting block 16. Positioning holes 17 are opened on both sides of the outer side of the mounting plate 5. Positioning rods 18 are movably connected inside the positioning holes 17. The outer side of the positioning rods 18 is installed on the outer side of the inner wall of the moving plate 9. A sliding groove 19 is opened on the outer side of the inner wall of the moving groove 71. A slider 20 is slidably connected inside the sliding groove 19. The inner side of the slider 20 is installed on the outer side of the heating module body 1, providing rigid guidance for the movement of the heating module body 1 and reducing friction and shaking. A connecting groove 21 is opened at the bottom of the mounting plate 5, which corresponds to the moving groove 71. The heating module body 1 is located at the top of the connecting groove 21. A protective box 22 is installed on the outer side of the controller 63. The protective box 22 is installed on the back of the welding device body 3. The electromagnetic lock 12 is existing technology.

[0041] Working principle: The pallet is smoothly fed into the welding device body 3 by the conveyor 4. Then, the mounting plate 5 and its connecting mechanism are moved to the inside of the pallet and the structure to be welded by the moving device 2 and the moving plate 9. The vision sensor 62 is activated to accurately identify the welding point position on the pallet surface and transmit the obtained coordinate data to the controller 63 in real time.

[0042] After receiving and parsing the data, if necessary, such as when the pallet being processed is small and the welding points are relatively concentrated, the controller 63 sends an energizing command to the moving electromagnetic block 74, causing it to generate magnetism and adhere to the sliding plate 72 in the moving groove 71, thereby driving the heating module body 1 to slide laterally along the sliding groove 19. When the heating module body 1 moves directly above the target welding point, the positioning electromagnetic block 75 at the corresponding position is simultaneously energized, fixing the sliding plate 72 through electromagnetic adsorption force, thereby initially fixing the heating module body 1. At the same time, the electromagnetic lock 12 is energized and its locking tongue is precisely inserted into the locking hole 13 at the top of the support rod 10, ensuring that the heating module body 1 is stable and does not shake during subsequent operations through the mechanical locking mechanism.

[0043] After the lateral position calibration is completed, the electric push rod 8 is started by the controller 63. Its output end pushes the mounting plate 5 to slide along the moving plate 9, which drives the heating module body 1 to move towards the tray. The mounting plate 5 effectively limits the lateral displacement through the precise cooperation between the positioning rod 18 and the positioning hole 17, ensuring the stability of the overall movement. When the connecting groove 21 at the bottom of the moving plate 9 is precisely aligned with the welding area of ​​the tray, the proximity sensor 61 at the bottom of the heating module body 1 senses the protrusion of the welding point of the tray and is triggered. If the position does not need to be adjusted, the proximity sensor 61 is directly triggered after the visual sensor 62 detects it. After the proximity sensor 61 detects it, it sends a signal to the controller 63. After receiving and processing the signal, the controller 63 sends a heating command to the corresponding heating module body 1. At this time, the heat collection box 14 plays a role in heat collection and conducts heat to the welding point in a directional manner. The outer heat insulation plate 15 forms a heat barrier layer to prevent heat from spreading to other parts of the equipment and avoid high temperature affecting the performance of the surrounding structure.

[0044] After heating is complete, the electric push rod 8 retracts in the reverse direction, driving the heating module body 1 back to its initial position. At this time, the controller 63 controls the electromagnetic lock 12, the moving electromagnetic block 74, and the positioning electromagnetic block 75 to be de-energized simultaneously, releasing the mechanical lock and electromagnetic adsorption state. At this time, the spring 73 resets and pushes the slide plate 72 to move. The movement of the slide plate 72 can push the heating module body 1 to move and reset. At the same time, the conveying device 4 drives the moving plate 9 and its connected overall structure to move and reset, waiting for the next processing. This achieves the effect of precise heating of the tray welding point and avoids energy waste.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A selective heating module for pallet welding, comprising a heating module body (1), a moving device (2), a welding device body (3), and a conveying device (4), characterized in that: The conveying device (4) is installed on the front side of the bottom of the welding device body (3). The heating module body (1) is located on the back side inside the welding device body (3). There are several heating module bodies (1), and the several heating module bodies (1) are arranged at equal distances. The rear side of the inner wall of the welding device body (3) is provided with a mounting plate (5). There are three sets of mounting plates (5), and the three sets of mounting plates (5) are arranged at equal distances. A heating detection component (6) is provided at the bottom of the heating module body (1). The heating detection component (6) includes a proximity sensor (61). The number of proximity sensors (61) corresponds to the number of heating module bodies (1). A vision sensor (62) is provided at the bottom of the heating module body (1). There are four sets of vision sensors (62), and the four sets of vision sensors (62) are evenly distributed at the bottom of the heating module body (1). The vision sensors (62) are installed at the bottom of the mounting plate (5). The proximity sensor (61) is electrically connected to a controller (63) through a wire. The controller (63) is electrically connected to the vision sensor (62) through a wire. A sliding moving component (7) is provided on the outer side of the mounting plate (5).

2. The selective heating module for tray welding according to claim 1, characterized in that, The sliding moving component (7) includes a moving groove (71), the heating module body (1) is located inside the moving groove (71), a sliding plate (72) is installed on the inner side of the heating module body (1), a spring (73) is installed on the inner side of the sliding plate (72), a moving electromagnetic block (74) is installed on the other end of the spring (73), the moving electromagnetic block (74) is magnetically connected to the sliding plate (72), a positioning electromagnetic block (75) is installed on the outer side of the inner wall of the moving groove (71), a plurality of positioning electromagnetic blocks (75) are provided, and the plurality of positioning electromagnetic blocks (75) are arranged at equal distances, the positioning electromagnetic blocks (75) are magnetically connected to the sliding plate (72), and the controller (63) is electrically connected to the moving electromagnetic block (74) and the positioning electromagnetic block (75) through wires.

3. The selective heating module for tray welding according to claim 1, characterized in that, Electric push rods (8) are provided at the four corners of the inner wall of the welding device body (3). The output end of the electric push rod (8) is installed on the outer side of the top of the two sets of mounting plates (5). A moving plate (9) is installed at the bottom of the electric push rod (8). The middle mounting plate (5) of the three sets is installed inside the moving plate (9). The outer side of the moving plate (9) is installed on the inner side of the moving device (2).

4. The selective heating module for tray welding according to claim 2, characterized in that, A support rod (10) is installed on the outside of the heating module body (1). A positioning groove (11) is opened on the outside of the inner wall of the moving groove (71). The surface of the support rod (10) is located inside the positioning groove (11). An electromagnetic lock (12) is installed on the inner side of the top of the inner wall of the positioning groove (11). A locking hole (13) is opened on the top of the support rod (10). Several locking holes (13) are provided, and the several locking holes (13) are arranged at equal distances. The electromagnetic lock (12) locks the support rod (10) through the locking hole (13). The controller (63) is electrically connected to the electromagnetic lock (12) through a wire.

5. A selective heating module for tray welding according to claim 1, characterized in that, A central box (14) is installed on the outside of the heating module body (1), and a heat insulation plate (15) is installed on the outside of the central box (14).

6. A selective heating module for tray welding according to claim 3, characterized in that, The heating module body (1) has a mounting block (16) installed at the bottom. The proximity sensor (61) is installed at the bottom of the mounting block (16). The mounting plate (5) has positioning holes (17) on both sides of its outer side. The positioning hole (17) is movably connected to the inside of the positioning rod (18). The outer side of the positioning rod (18) is installed on the outer side of the inner wall of the moving plate (9).

7. A selective heating module for tray welding according to claim 2, characterized in that, A sliding groove (19) is provided on the outer side of the inner wall of the moving groove (71), and a slider (20) is slidably connected inside the sliding groove (19). The inner side of the slider (20) is installed on the outer side of the heating module body (1).

8. A selective heating module for tray welding according to claim 2, characterized in that, The bottom of the mounting plate (5) is provided with a connecting groove (21), which corresponds to the moving groove (71). The heating module body (1) is located at the top of the connecting groove (21). A protective box (22) is installed on the outside of the controller (63), and the protective box (22) is installed on the back of the welding device body (3).

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