Gas shielded welding machine for welding steel wire of automobile seat

Abstract

The invention relates to the technical field of welding machines, and discloses a gas shielded welding machine for welding a steel wire of an automobile seat, which comprises a seat steel wire welding machine, a gas shielded welding machine and a gas shielded welding machine, the intelligent welding mechanism comprises an intelligent welding mechanical arm, a gas protection barrel, a gas supply module and a detection module, the gas protection barrel is fixed to the outer portion of a welding gun head of the intelligent welding mechanical arm and is 8-12 cm higher than an operation port of the welding gun head, gas spraying heads are arrayed on the bottom ring wall of the gas protection barrel, the gas spraying heads are annularly distributed around the welding gun head, and the gas spraying heads are connected with the gas supply module; the gas supply module provides protective gas for the gas spraying head and blows the protective gas to the operation port of the welding gun head, so that the protective gas is in direct contact with a welding point to form a protective gas curtain; the gas spraying heads 36 are arranged on the bottom ring wall of the gas protection cylinder 23 in an array mode, and all the gas spraying heads 36 are annularly distributed around the welding gun head, so that protective gas can be directly blown to an operation port of the welding gun head from multiple directions, and a complete protective gas curtain is formed.

Description

Technical Field

[0001] This invention relates to the field of welding machines, and more specifically, to a gas-shielded welding machine for welding steel wires for automotive seats. Background Technology

[0002] The steel wires of car seats are an important component of the car seat frame, and their welding quality is directly related to the structural strength and safety of the seat. In the welding of car seat steel wires, gas shielded welding machines are usually used to protect the welding area from the intrusion of harmful gases in the air.

[0003] Insufficient shielding gas coverage is a common problem in traditional argon arc welding or carbon dioxide shielded welding, where the shielding gas is typically ejected from the side of the welding torch, making it difficult to form a complete gas curtain. This leaves the welding area exposed to the air, increasing the risk of oxide inclusions and affecting weld quality. To address this, we propose a gas-shielded welding machine for welding steel wire in automotive seats. Summary of the Invention

[0004] This invention provides a gas shielded welding machine for welding steel wires for automotive seats, solving the technical problem in related technologies where the shielding gas is usually ejected from the side of the welding torch, making it difficult to form a complete gas curtain protection, resulting in the welding area being exposed to the air, which easily leads to the formation of oxide inclusions and affects the quality of the weld.

[0005] This invention provides a gas shielded welding machine for welding steel wires for automotive seats, comprising: a seat steel wire welding machine, wherein the seat steel wire welding machine is equipped with an intelligent welding mechanism; The intelligent welding mechanism includes an intelligent welding robotic arm, a gas shielding cylinder, a gas supply module, and a detection module. The gas shielding cylinder is fixed outside the welding gun head of the intelligent welding robotic arm and is 8-12cm higher than the working port of the welding gun head. The bottom ring wall of the gas shielding cylinder has an array of air jets. All the air jets are distributed in a ring around the welding gun head. The air jets are connected to the gas supply module, which provides protective gas to the air jets and blows it toward the working port of the welding gun head, so that the protective gas directly contacts the welding point to form a protective gas curtain. The outer wall of the gas-insulating cylinder is provided with an annular air curtain ejection port. The air curtain ejection port is connected to the air supply module through an independent air supply channel. The air supply module provides high-speed airflow to the air curtain ejection port to form a circular air curtain wall. This air curtain wall completely surrounds the working port of the welding gun head and suppresses the sparks generated during the welding process. The detection module is integrated into the intelligent welding mechanism. It collects data on the molten pool temperature, arc voltage, welding current, and spark spatter intensity at the welding point in real time. The built-in intelligent analysis unit processes the data in real time and dynamically adjusts the number of air curtain nozzles and the airflow intensity according to the preset algorithm model to achieve precise matching control of air curtain pressure and spark spatter volume.

[0006] Furthermore, the working area of ​​the seat wire welding machine is equipped with a wire positioning seat for placing and fixing multiple seat wires. The air supply module includes an air curtain supply module and a protective gas supply module, both of which are fixed to the inner wall of the machine casing of the seat wire welding machine. The intelligent welding robotic arm is fixed to one side of the wire positioning seat.

[0007] Furthermore, the interior of the gas-insulating cylinder is divided into multiple spaces. A gun head channel is set at the axial position of the gas-insulating cylinder. The welding gun head of the intelligent welding robot arm passes through the gun head channel. A ventilation chamber is set outside the gun head channel, and a partition ring is fixedly set inside the ventilation chamber.

[0008] Furthermore, the partition ring divides the ventilation chamber into two parts: the lower part is the protective gas chamber, and several jet heads are connected to the protective gas chamber. Each jet head has an inclined jet nozzle at its exhaust end, and all jet nozzles face the welding torch head, so that the protective gas is concentrated towards the welding point.

[0009] Furthermore, above the partition ring is a gas curtain gas collection space, in which a piston ring is slidably arranged. Above the piston ring is a push spring, and a guide vent column is inserted through the center of the push spring. The guide vent column passes through the piston ring and the partition ring in sequence to guide the piston ring to slide.

[0010] Furthermore, the air curtain has three nozzles, each with a different jet angle. The welding gun head is also equipped with a receiving plate, on which three electromagnets are arrayed and controlled by the system.

[0011] Furthermore, an adjustment rope is fixedly installed on the upper wall of the piston ring. The adjustment rope passes through the gas cylinder and runs along multiple limit rings to the top of three electromagnets. The telescopic columns of the three electromagnets are all connected to the adjustment rope. By working the three electromagnets, the adjustment rope is pulled to adjust the height of the piston ring, thereby controlling the operation of the corresponding number of air curtain ejection rings.

[0012] Furthermore, an independent protective gas storage chamber is provided at the top of the gas collection space of the air curtain. The inlet end of the protective gas storage chamber is connected to a protective gas supply pipe. The protective gas supply pipe is connected to the protective gas supply module. The protective gas flows into the protective gas chamber along the guide ventilation column.

[0013] Furthermore, the air inlet of the air curtain gas collection space is connected to an air curtain supply pipe, which, together with the air curtain supply module, supplies gas to the air curtain gas collection space.

[0014] Furthermore, the detection module consists of multiple sensors and cameras, all of which are fixed to the lower wall of the receiving plate.

[0015] The beneficial effects of this invention are as follows: The present invention arranges air jets 36 in an array on the bottom ring wall of the gas shield 23, and all air jets 36 are arranged in a ring around the welding gun head, so that the protective gas can be blown directly to the working port of the welding gun head from multiple directions to form a complete protective gas curtain, effectively isolating harmful gases such as oxygen and nitrogen in the air, preventing oxidation of the welding area, and significantly improving the quality of the weld. By opening an air curtain nozzle 31 on the outer wall of the gas-insulating cylinder 23 and forming a circular air curtain wall, the working port of the welding gun head is completely surrounded. The air curtain wall formed by the high-speed airflow can effectively suppress the sparks generated during the welding process, avoid the impact of sparks on the operator and the workpiece, and improve the safety of the operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the intelligent welding robotic arm structure of the present invention; Figure 3 This is a schematic diagram of the gas-insulating cylinder structure of the present invention; Figure 4 This is the invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the internal structure of the gas-insulating cylinder of the present invention; Figure 6 This is a schematic diagram of the piston ring structure at different positions according to the present invention; Figure 7 This is a schematic diagram of the lower wall structure of the gas-insulating cylinder of the present invention.

[0017] In the diagram: 11. Seat wire welding machine; 12. Wire positioning seat; 2. Intelligent welding mechanism; 21. Intelligent welding robotic arm; 22. Receiving plate; 23. Gas shielding cylinder; 24. Gas curtain supply pipe; 25. Protective gas supply pipe; 26. Electromagnet; 27. Gas curtain supply module; 28. Protective gas supply module; 31. Gas curtain ejection ring; 32. Adjusting curtain pull rope; 33. Limiting ring; 34. Protective gas chamber; 35. Separating ring; 36. Jet nozzle; 37. Jet outlet; 38. Gun head path; 301. Piston ring; 302. Guide ventilation column; 303. Push spring; 304. Protective gas storage chamber; 41. Detection module. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] like Figures 1-7 As shown, a gas shielded welding machine for welding steel wires for automobile seats includes: a seat steel wire welding machine 11, wherein the seat steel wire welding machine 11 is provided with an intelligent welding mechanism 2; The intelligent welding mechanism 2 includes an intelligent welding robotic arm 21, a gas shielding cylinder 23, a gas supply module, and a detection module 41. The gas shielding cylinder 23 is fixed outside the welding gun head of the intelligent welding robotic arm 21 and is 8-12cm higher than the working port of the welding gun head. The bottom ring wall of the gas shielding cylinder 23 has an array of air jets 36. All the air jets 36 are arranged in a ring around the welding gun head. The air jets 36 are connected to the gas supply module. The gas supply module provides protective gas to the air jets 36 and blows it toward the working port of the welding gun head, so that the protective gas directly contacts the welding point to form a protective gas curtain. The outer wall of the gas-insulating cylinder 23 is provided with an annular air curtain ejection port 31. The air curtain ejection port 31 is connected to the air supply module through an independent air supply channel. The air supply module provides high-speed airflow to the air curtain ejection port 31 to form a circular air curtain wall. This air curtain wall completely surrounds the working port of the welding gun head and suppresses the sparks generated during the welding process. The detection module 41 is integrated into the intelligent welding mechanism 2. It collects data on the molten pool temperature, arc voltage, welding current and spark spatter intensity of the welding point in real time. The built-in intelligent analysis unit processes the data in real time and dynamically adjusts the number of openings and airflow intensity of the air curtain nozzle 31 according to the preset algorithm model to achieve precise matching control of air curtain pressure and spark spatter amount.

[0020] The working area of ​​the seat wire welding machine 11 is equipped with a wire positioning seat 12 for placing and fixing multiple seat wires. The air supply module includes an air curtain supply module 27 and a protective gas supply module 28, both of which are fixed to the inner wall of the machine casing of the seat wire welding machine 11. The intelligent welding robotic arm 21 is fixed to one side of the wire positioning seat 12.

[0021] The interior of the gas-insulating cylinder 23 is divided into multiple spaces. A gun head channel 38 is set at the axial position of the gas-insulating cylinder 23. The welding gun head of the intelligent welding robotic arm 21 passes through the gun head channel 38. A ventilation chamber is provided outside the gun head channel 38. A partition ring 35 is fixedly installed inside the ventilation chamber.

[0022] The partition ring 35 divides the ventilation chamber into two parts. The lower part is the protective gas chamber 34. Several jet heads 36 are connected to the protective gas chamber 34. Each jet head 36 has an inclined jet nozzle 37 at its exhaust end. All jet nozzles 37 face the welding gun head, so that the protective gas is concentrated towards the welding point.

[0023] Above the partition ring 35 is a gas collection space for the gas curtain. A piston ring 301 is slidably arranged in this space. A push spring 303 is arranged above the piston ring 301. A guide venting column 302 is inserted through the center of the push spring 303. The guide venting column 302 passes through the piston ring 301 and the partition ring 35 in sequence to guide the piston ring 301 to slide.

[0024] The air curtain ejection ring 31 has three openings, and the three air curtain ejection rings 31 have different jet angles. The welding gun head is also equipped with a receiving plate 22, on which three electromagnets 26 are arrayed, and all of them are controlled by the system.

[0025] The upper wall of the piston ring 301 is also fixedly provided with a curtain adjustment rope 32. The curtain adjustment rope 32 passes through the air cylinder 23 and runs along multiple limit rings 33 to the top of three electromagnets 26. The telescopic columns of the three electromagnets 26 are all connected to the curtain adjustment rope 32. The height of the piston ring 301 is adjusted by pulling the curtain adjustment rope 32 through the operation of the three electromagnets 26, thereby controlling the operation of the corresponding number of air curtain ejection rings 31.

[0026] The top of the gas curtain gas collection space is provided with an independent protective gas storage chamber 304. The air inlet of the protective gas storage chamber 304 is connected to a protective gas supply pipe 25. The protective gas supply pipe 25 is connected to the protective gas supply module 28. The protective gas storage chamber 304 flows into the protective gas chamber 34 along the guide ventilation column 302.

[0027] The air inlet of the air curtain gas collection space is connected to an air curtain supply pipe 24, which, together with the air curtain supply module 27, supplies gas to the air curtain gas collection space.

[0028] The detection module 41 consists of multiple sensors and cameras, all of which are fixed to the lower wall of the receiving plate 22.

[0029] Its core lies in achieving intelligent and precise control of the welding process through the intelligent welding mechanism 2, especially the active suppression of welding spatter. Its working principle can be divided into three synergistic levels: basic gas path protection, intelligent dynamic air curtain barrier, and closed-loop control based on real-time perception.

[0030] Basic air circuit protection and workpiece positioning: Before the welding operation begins, the operator places and secures the multiple chair wires to be welded on the wire positioning seat 12 to ensure welding accuracy. The intelligent welding robotic arm 21 carries the composite welding torch to the work position.

[0031] Protective gas supply: When the protective gas supply module 28 is activated, the protective gas (such as CO2 mixed with argon to reduce the splash rate) enters the protective gas storage chamber 304 through the protective gas supply pipe 25, and then flows into the protective gas chamber 34 below along the guide ventilation column 302.

[0032] Primary protection is formed: The gas is finally ejected from the jet head 36, which is connected to the shielding gas chamber 34. Since the jet nozzles 37 of all the jet heads 36 are tilted towards the welding gun head, the gas streams they eject converge towards the welding point, forming a first dense shielding gas curtain around the arc, isolating it from the air and preventing the weld from oxidizing.

[0033] Adaptive mechanical structures and the generation of air curtains: To address the high-temperature spatter generated during welding, this invention incorporates a unique air curtain generation and adjustment mechanism.

[0034] Gas supply: The gas curtain supply module 27 is independent of the protection gas circuit and provides high-pressure gas to the gas curtain gas collection space inside the gas cylinder 23 (i.e., the space above the partition ring 35) through the gas curtain supply pipe 24.

[0035] Active jetting of the air curtain: These high-pressure gases are ultimately ejected at high speed from the air curtain ejection ring 31, forming a powerful circular air curtain around the working port of the welding torch. This air curtain acts like an invisible "protective shield," physically suppressing and blocking the sparks generated during the welding process, preventing them from contaminating the workpiece or damaging the welding torch.

[0036] Mechanical adjustment of air curtain intensity: The system can control the independent operation of three electromagnets 26 on the receiving plate 22. When one of the electromagnets 26 is energized, its telescopic column pulls the connected curtain adjustment rope 32. The rope, guided by multiple limit rings 33, overcomes the elastic force of the push spring 303 and pulls the piston ring 301 upward. The piston ring 301 slides smoothly upward under the guidance of the guide ventilation column 302, thereby gradually opening the air curtain spray outlets 31 at different spray angles. By controlling the number of opening outlets, the airflow intensity and coverage area of ​​the air curtain wall can be precisely adjusted.

[0037] Intelligent closed-loop control process: The core of intelligence lies in the linkage between the detection module 41 and the built-in intelligent analysis unit, which realizes real-time closed-loop control of "perception-decision-execution".

[0038] Step 1: Real-time data acquisition The detection module 41 (composed of multiple sensors and a camera), integrated into the lower wall of the receiving plate 22, operates continuously during the welding process. It collects key physical parameters of the welding point in real time, including: Molten pool temperature: obtained through infrared thermal imaging or photoelectric sensors.

[0039] Arc voltage and welding current: acquired through an electrical signal sensor.

[0040] Spark splash intensity: The number, size, and spray distance of the splashed particles are captured by a high-speed camera, or the acoustic characteristics generated by the splash are analyzed by an acoustic sensor.

[0041] Step Two: Intelligent Data Analysis and Decision Making The collected multi-dimensional data is transmitted in real time to the built-in intelligent analysis unit. This unit contains a pre-set algorithm model trained on a large amount of welding experimental data. The core of this model is to establish the dynamic relationship between spatter quantity and other parameters. For example, according to the short-circuit transfer welding theory, the spatter quantity S is related to the peak short-circuit current. and current rise rate Closely related. The intelligent analysis unit monitors in real time. and This allows for the prediction of the scale of the impending splash. Furthermore, by combining this with the molten pool temperature T, the optimal gas curtain pressure required at that moment can be calculated. .

[0042] The simplified decision-making model can be represented as: ; Step 3: Dynamic and Precise Execution Based on the model's calculations, the system makes two adjustments instantly (in milliseconds): Air curtain intensity control: A command is sent to electromagnet 26 to adjust the number of openings of the air curtain ejection rings 31. When an increase in splash volume is predicted, the system quickly opens more rings to increase the air curtain pressure in order to match and suppress the high-intensity splash.

[0043] Fine-tuning of airflow intensity: At the same time, the system can also adjust the valve of the gas supply module to independently change the flow rate of the protective gas sprayed to the welding point, ensuring that the protective atmosphere in the core welding area remains stable when the pressure of the air curtain changes.

[0044] Through the above process, precise matching and control of air curtain pressure and spark spatter amount are achieved, ensuring that protective measures are always adapted to the real-time status of the welding process.

[0045] The system achieves "intelligent dynamic suppression" of welding spatter: through the detection module 41 and the intelligent analysis unit, spatter control is elevated from "static prevention" to "dynamic intervention" for the first time. The system can predict changes in spatter intensity in real time and actively adjust the air curtain pressure at the air curtain outlet 31 to achieve "on-demand suppression" of spatter, maximizing the spatter suppression effect.

[0046] A multi-layered, sophisticated protective system with a "core-periphery" structure was constructed, abandoning the single protective gas shield design. It forms a "core protective gas curtain" directly acting on the welding point through the jet nozzle 36, ensuring the metallurgical quality of the weld; simultaneously, it constructs a "peripheral physical gas curtain wall" surrounding the entire working area through the gas curtain's outlet ring 31. This double-layered protective structure ensures both the oxidation resistance requirements of the weld pool and solves the problem of spatter contamination. In particular, the design of the gas shield 23, which is 8-12cm higher than the welding torch tip's working port, provides ideal spatial conditions for forming a stable protective gas curtain.

[0047] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of the present embodiments, all of which are within the protection scope of the present embodiments.

Claims

1. A gas-shielded welding machine for welding steel wires for automobile seats, characterized in that, include: Seat wire welding machine (11), wherein the seat wire welding machine (11) is equipped with an intelligent welding mechanism (2); The intelligent welding mechanism (2) includes an intelligent welding robotic arm (21), a gas shield (23), a gas supply module, and a detection module (41). The gas shield (23) is fixed outside the welding gun head of the intelligent welding robotic arm (21) and is 8-12cm higher than the working port of the welding gun head. The bottom ring wall of the gas shield (23) is arrayed with air jets (36). All air jets (36) are arranged in a ring around the welding gun head. The air jets (36) are connected to the gas supply module. The gas supply module provides protective gas to the air jets (36) and blows it toward the working port of the welding gun head, so that the protective gas directly contacts the welding point to form a protective gas curtain. The outer wall of the gas-insulating cylinder (23) is provided with an annular air curtain ejection port (31). The air curtain ejection port (31) is connected to the air supply module through an independent air supply channel. The air supply module provides high-speed airflow to the air curtain ejection port (31) to form a circular air curtain wall. The air curtain wall completely surrounds the working port of the welding gun head and suppresses the sparks generated during the welding process. The detection module (41) is integrated into the intelligent welding mechanism (2) to collect data on the molten pool temperature, arc voltage, welding current and spark spatter intensity of the welding point in real time. The data is processed in real time by the built-in intelligent analysis unit. The number of openings and airflow intensity of the air curtain nozzle (31) are dynamically adjusted according to the preset algorithm model to achieve precise matching control of air curtain pressure and spark spatter amount.

2. The gas-shielded welding machine for welding steel wire in automobile seats according to claim 1, characterized in that, The working area of ​​the seat wire welding machine (11) is provided with a wire positioning seat (12) for placing and fixing multiple seat wires. The air supply module includes an air curtain supply module (27) and a protective gas supply module (28), both of which are fixed on the inner wall of the chassis of the seat wire welding machine (11). The intelligent welding robotic arm (21) is fixed on one side of the wire positioning seat (12).

3. A gas-shielded welding machine for welding steel wire in automobile seats according to claim 2, characterized in that, The interior of the gas-insulating cylinder (23) is divided into multiple spaces. A gun head channel (38) is provided at the axial position of the gas-insulating cylinder (23). The welding gun head of the intelligent welding robot arm (21) passes through the gun head channel (38). A ventilation chamber is provided outside the gun head channel (38). A partition ring (35) is fixedly provided inside the ventilation chamber.

4. A gas-shielded welding machine for welding steel wire in automobile seats according to claim 3, characterized in that, The partition ring (35) divides the ventilation chamber into two parts, with the lower part being the protective gas chamber (34). Several jet heads (36) are connected to the protective gas chamber (34). Each jet head (36) has an inclined jet nozzle (37) at its ejection end. All jet nozzles (37) face the welding gun head, causing the protective gas to converge towards the welding point.

5. A gas-shielded welding machine for welding steel wire in automobile seats according to claim 4, characterized in that, Above the separating ring (35) is a gas curtain gas collection space, in which a piston ring (301) is slidably arranged. Above the piston ring (301) is a push spring (303), and a guide ventilation column (302) is inserted through the center of the push spring (303). The guide ventilation column (302) passes through the piston ring (301) and the separating ring (35) in sequence to guide the piston ring (301) to slide.

6. A gas-shielded welding machine for welding steel wire in automobile seats according to claim 5, characterized in that, The air curtain ejection port (31) has three openings, and the three air curtain ejection ports (31) have different jet angles. The welding gun head is also provided with a receiving plate (22), and the receiving plate (22) has three electromagnets (26) arrayed on it, all of which are controlled by the system.

7. A gas-shielded welding machine for welding steel wire in automobile seats according to claim 6, characterized in that, The piston ring (301) is also fixedly provided with a curtain adjustment rope (32). The curtain adjustment rope (32) passes through the air cylinder (23). The curtain adjustment rope (32) runs along multiple limiting rings (33) to the top of three electromagnets (26). The telescopic columns of the three electromagnets (26) are all connected to the curtain adjustment rope (32). The height of the piston ring (301) is adjusted by pulling the curtain adjustment rope (32) through the operation of the three electromagnets (26), thereby controlling the operation of the corresponding number of air curtain ejection rings (31).

8. A gas-shielded welding machine for welding steel wire in automobile seats according to claim 7, characterized in that, The top of the gas curtain gas collection space is provided with an independent protective gas storage chamber (304). The air inlet of the protective gas storage chamber (304) is connected to a protective gas supply pipe (25). The protective gas supply pipe (25) is connected to the protective gas supply module (28). The protective gas storage chamber (304) flows into the protective gas chamber (34) along the guide ventilation column (302).

9. A gas-shielded welding machine for welding steel wire in automobile seats according to claim 8, characterized in that, The air inlet of the air curtain gas collection space is connected to an air curtain supply pipe (24), which, together with the air curtain supply module (27), supplies gas to the air curtain gas collection space.

10. A gas-shielded welding machine for welding steel wire in automobile seats according to claim 9, characterized in that, The detection module (41) consists of multiple sensors and cameras, all of which are fixed to the lower wall of the receiving plate (22).

Images