Intelligent argon arc welding machine based on case machining and welding method

Abstract

The invention discloses an intelligent argon arc welding machine based on case machining and a welding method, and relates to the technical field of case machining, the intelligent argon arc welding machine comprises a control box and a welding clamp, and further comprises a welding gun, the welding gun is composed of a grab handle and a welding head, and the welding head is fixedly connected with the grab handle through a butt joint sleeve; the welding head is composed of a welding part and an air injection part, and the welding part comprises a first welding pipe and a second welding pipe. The device has the advantages that when plates are welded, the conveying flow of the protector can be automatically changed according to the inclination angle of the welding gun, so that the protector is conveyed at the optimal flow, the protection effect of the protector is improved, the loss of shielding gas is reduced, meanwhile, the spraying speed of the shielding gas can be kept constant in the shielding gas changing process, and the probability of bubble generation is reduced; in addition, when the shielding gas is jetted, the protector is made to be perpendicular to the welding position all the time, and the protection effect of the shielding gas can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of chassis processing, and in particular to an intelligent argon arc welding machine and a welding method based on chassis processing. Background Art

[0002] Chassis processing includes processes such as cutting, stamping, welding, and grinding. Among them, the welding process is to weld the plates after cutting and stamping. Since the plate thickness is relatively thin, the argon arc welding method is generally used, which has the advantages of protecting the plates and high welding efficiency.

[0003] The existing argon arc welding machine consists of a machine body, a welding torch, and a welding clamp. When welding, a welding clamp is required to energize the plate. A gas jet head is arranged in the welding torch, and a shielding gas is sprayed to the welding position during welding to protect the welding position and prevent it from oxidizing. In the prior art, the welding torch of the argon arc welding machine generally consists of a nozzle, an electrode cap, an open jacket, and an inner electrode. The design is simple, but since the nozzle only adopts a single tubular structure, it cannot optimize the flow of the shielding gas, resulting in a large amount of argon gas being continuously transported in different welding environments or for different sizes of welds to prevent the oxidation of the welding material. This easily causes argon gas waste or unstable flow of the shielding gas. Therefore, the publication number CN118404170B discloses a DC pulsed argon arc welding machine, which includes a welding machine power supply box with an operation panel arranged on one side end face. A welding torch negative interface and a ground wire interface are arranged on the welding machine power supply box, and a ground wire clamp is externally connected to the ground wire interface; an argon gas cylinder is arranged on one side of the welding machine power supply box, and the upper end of the argon gas cylinder is connected to a gas pipe through a flow meter. A gas input port is arranged on one side of the welding machine power supply box; a welding torch tube is externally connected to the welding torch negative interface, and a gas connection tube is arranged outside the welding torch tube; a gas output port is arranged on the welding machine power supply box, and the other end of the gas connection tube is communicated with the gas output port; a welding torch mechanism is connected to the welding torch tube.

[0004] The welding torch mechanism adopted by the above welding machine can deliver argon gas with the best gas supply action through the ventilation component according to the size of the weld and the environmental conditions (environmental air flow speed, temperature, humidity, etc.) during the welding operation. In this way, not only can it ensure that the argon gas delivery volume during the welding process reaches the rated requirement, but also it can effectively reduce argon gas waste and ensure the welding quality.

[0005] However, for the above-mentioned and existing welding machines, the jet flow rate of the gas jet head is controlled by the machine body. However, for the welding angle of the welding torch, different welding angles require different shielding gas flow rates. Because for different welding angles, the angle of the gas ejected by the gas jet head is different. If a constant flow rate of gas is ejected, the impact force between the gas ejected by the tilted gas jet head and the workpiece will be less than the impact force of the gas ejected by the vertical gas jet head. As the angle changes, the impact force changes, and welding bubbles will be generated due to unstable shielding gas ejection.

[0006] Therefore, a new type of intelligent argon arc welder based on chassis processing and a welding method can be adopted to solve the deficiencies of the prior art. Summary of the Invention

[0007] The object of the present invention is to solve the problems existing in the prior art, and to propose an intelligent argon arc welder based on chassis processing and a welding method.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: An intelligent argon arc welder based on chassis processing includes a control box and a welding clamp, and further includes a welding torch. The welding torch is composed of a handle and a welding head. The welding head is fixedly connected to the handle through a docking sleeve. The welding head contains a tungsten needle inside. The tungsten needle and the welding clamp are connected to the control box through wires. The welding head is composed of a welding part and a gas jet part. The welding part includes a first welding pipe and a second welding pipe. The tungsten needle is connected to the second welding pipe and the first welding pipe through a clamping assembly. The clamping assembly includes a clamping unit for clamping the tungsten needle. The gas jet part is fixedly installed outside the second welding pipe and includes an annular gas jet pipe. An inclination sensing control module is fixedly installed on the handle. A flow rate regulating assembly controlled by the inclination sensing control module is installed on the annular gas jet pipe.

[0009] Preferably, the flow rate regulating assembly includes a gas guiding ring rotatably installed on the annular gas jet pipe. A gas blocking cover is fixedly installed on the annular gas jet pipe. A driving mechanism cooperating with the gas guiding ring is installed between the annular gas jet pipe and the gas blocking cover. A plurality of rotating shafts are rotatably installed through the gas guiding ring. An adjusting blade is fixedly installed on each rotating shaft. A rotating mechanism cooperating with the plurality of adjusting blades is installed on the gas guiding ring.

[0010] Preferably, the driving mechanism includes a first toothed ring fixedly installed on the side of the gas guiding ring, a second motor fixedly installed on the gas blocking cover, and a second motor fixedly installed on the gas blocking cover. A toothed disc meshing with the first toothed ring is fixedly installed on the driving end of the second motor.

[0011] Preferably, the rotating mechanism includes a first motor fixedly installed on the gas guiding ring. A second gear is fixedly installed on the driving end of the first motor. A second toothed ring is rotatably installed outside the gas guiding ring. A first gear meshing with the second toothed ring is fixedly installed on each rotating shaft. An incomplete toothed ring meshing with the second gear is fixedly installed on the second toothed ring.

[0012] Preferably, a counterweight ring is fixedly installed on the annular gas jet pipe. The counterweight ring is designed with an opening and cooperates with the first motor for counterweight of the first motor to improve the stability during welding.

[0013] Preferably, an adjustment cover is fixedly installed on the air baffle cover. The adjustment cover is composed of a plurality of baffles that can rotate freely. Adjacent baffles are arranged staggeredly, and the rotation of the baffles has a damping effect. A wire mesh cover is fixedly installed between the air baffle cover and the annular spray pipe.

[0014] Preferably, each baffle is made of a one-millimeter steel plate, and each baffle is arc-shaped. Adjacent baffles are in close contact with each other.

[0015] Preferably, a control vane is rotatably installed on each adjusting vane through a shaft rod. A third gear is fixedly installed on each shaft rod. A plurality of arc-shaped grooves are formed inside the air guide ring, and an arc-shaped toothed ring meshing with the corresponding third gear is fixedly installed in each arc-shaped groove.

[0016] Preferably, the central angle corresponding to each arc-shaped toothed ring is 60 degrees, and the rotation angle of each rotating shaft is within 60 degrees.

[0017] The present invention also provides an intelligent argon arc welding method based on chassis processing, including the above-mentioned intelligent argon arc welding machine for chassis processing, and further including the following steps: S1. First, install the tungsten needle (17) on the welding torch (3), then clamp the welding clamp (5) on the plate to be welded, then energize, adjust the protective gas pressure on the control box (1) to an appropriate position, and then perform welding; S2. Before the welding process, the operator holds the welding torch (3) and brings the tungsten needle 17 close to the welded part, and then starts the welding machine. During the welding process, high-pressure protective gas is sprayed onto the welding part through the annular spray pipe 15. When moving the welding torch, the inclination angle sensing control module (8) collects the angle change between the welding torch and the welded part, and controls the flow rate of the protective gas sprayed out of the annular spray pipe (15) through the flow rate adjustment component according to the angle change, changes the spraying range of the protective gas, makes the protector spray more accurately on the welding part, and ensures that the protective gas is vertically sprayed on the welding part, reducing the participation of air at the welding part.

[0018] Compared with the existing technology, the advantages of the present invention are as follows: 1. When the welding machine performs plate welding, the inclination angle of the welding torch is sensed by the inclination angle sensing control module, and the angle of the adjusting vane is changed according to the size of the inclination angle to control the flow rate of the protective gas, so as to ensure the sufficient supply of the protective gas, reduce the loss of the protective gas, make the protective gas spray more stably at the welding position, reduce the probability of welding bubbles and oxidation at the welding part, and improve the welding quality.

[0019] 2. When the welding machine is welding plates, a second motor is set to drive the air guide to rotate circumferentially around the annular gas injection pipe. The rotation of the air guide ring drives the adjustment vanes on the air guide ring to rotate. A plurality of adjustment vanes form a fan, and the rotation of the fan accelerates the flow rate of the shielding gas in the annular gas injection pipe, so that the shielding gas is sprayed at a constant flow rate at the welding position, which can maintain the stability of the arc, ensure the stable shape of the arc during the welding process, and avoid the jumping or uneven fluctuation of the arc.

[0020] 3. When the welding machine is welding plates, by setting control vanes, and during the process of adjusting the angle of the adjustment vanes, the vanes automatically change the angle so that the control vanes are always parallel to the annular gas injection pipe. In this way, the sprayed shielding gas impacts vertically on the welding part, and the shielding gas can be more accurately directly transported to the welding area, especially around the arc and the molten pool. This can reduce the entry of external air into the welding area, avoid oxidation and contamination, and ensure the purity of the welded metal. Since the direction of the gas flow is more consistent with the alignment of the welding area, the vertically sprayed gas flow can effectively reduce the diffusion and loss of the shielding gas, thereby improving the shielding effect of the shielding gas.

[0021] In summary, when the present invention is welding plates, it can automatically change the delivery flow rate of the protector according to the inclination angle of the welding torch, so that the protector is delivered at the optimal flow rate, improving the shielding effect of the protector and reducing the loss of the shielding gas. At the same time, it can maintain the constant spraying speed of the shielding gas during the change of the shielding gas, reduce the probability of bubble generation, and improve the welding quality. In addition, when the shielding gas is sprayed, the protector is always perpendicular to the welding position for spraying, which is beneficial to improving the shielding effect of the shielding gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following further describes in detail the specific embodiments of the present invention with reference to the drawings, where: Figure 1 is a schematic structural diagram of an intelligent argon arc welding machine based on chassis processing proposed by the present invention; Figure 2 is Figure 1 a schematic detailed structural diagram after rotating a certain angle; Figure 3 is Figure 2 a schematic detailed structural diagram after the welding torch in rotates a certain angle; Figure 4 is Figure 3 a schematic enlarged structural diagram of the welding head, the gas injection pipe and the docking sleeve in; Figure 5 is Figure 4 a schematic enlarged structural diagram of the welding part in; Figure 6 is Figure 5 a schematic exploded structural diagram of; Figure 7 isFigure 4 Schematic detail drawing of the enlarged structure of the middle jetting part; Figure 8 For Figure 7 Schematic detail drawing of the planar structure along one of the angles; Figure 9 For Figure 8 Schematic detail drawing of the three-dimensional structure along the A-A section; Figure 10 For Figure 9 Schematic detail drawing of the enlarged structure of the adjustment cover in the middle; Figure 11 For Figure 9 Schematic detail drawing of the enlarged structure of components such as the first motor, the second motor, and the counterweight ring in the middle; Figure 12 For Figure 11 Schematic detail drawing of the exploded structure of; Figure 13 For Figure 12 Schematic detail drawing of the enlarged structure of components such as the first motor and the second toothed ring in the middle; Figure 14 For Figure 13 Schematic detail drawing of the enlarged structure of the rotating shaft, the adjustment blade, and the first gear in the middle; Figure 15 For Figure 14 Schematic detail drawing of the planar structure along one of the angles of components such as one of the rotating shafts, the adjustment blade, and the first gear in the middle; Figure 16 For Figure 9 Schematic detail drawing of the enlarged structure of the annular jet pipe and the air baffle cover in the middle.

[0023] In the figure: 1 control box, 2 high-pressure pipe, 3 welding torch, 4 welding rack, 5 welding clamp, 6 handle, 7 control button, 8 tilt angle sensing control module, 9 air guide pipe, 10 injection pipe, 11 welding head, 12 docking sleeve, 13 first welding pipe, 14 rotating sleeve, 15 annular jet pipe, 16 second welding pipe, 17 tungsten needle, 18 clamping unit, 19 first motor, 20 second motor, 21 adjustment cover, 22 counterweight ring, 23 air guide ring, 24 first toothed ring, 25 second toothed ring, 26 first gear, 27 incomplete toothed ring, 28 second gear, 29 rotating shaft, 30 adjustment blade, 31 control blade, 32 arc toothed ring, 33 third gear, 34 air baffle cover. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Example 1: Refer to Figures 1 - 5 , an intelligent argon arc welding machine based on chassis processing, including a control box 1 and a welding clamp 5, further including a welding torch 3. The welding torch 3 is composed of a handle 6 and a welding head 11. The welding head 11 is fixedly connected to the handle 6 through a docking sleeve 12. The inside of the welding head 11 contains a tungsten needle 17. The tungsten needle 17 and the welding clamp 5 are connected to the control box 1 through wires.

[0026] The control box 1 includes a power supply, an output cable, and a cooling system. The power supply can adjust the current according to different welding requirements. The current regulator can adjust the current magnitude as needed, affecting the heat input and welding effect of the welding. Using inverter technology, it can provide a more stable current, and has higher efficiency and smaller volume.

[0027] The tungsten needle 17 has good electrical conductivity and can maintain a stable arc under argon protection. In argon arc welding, the end of the tungsten needle 17 does not contact the plate, so the arc can burn stably between the tungsten needle 17 and the plate, and there will be no arc flickering or instability during the welding process, which can ensure the welding quality.

[0028] The output cable is connected to the wire, and together with the power supply, it provides current for the tungsten needle 17 and the welding clamp 5. The arc between the tungsten needle 17 and the welding clamp 5 is used to melt the welding wire, and the melted welding wire drips onto the welding place, so as to achieve the purpose of welding adhesion.

[0029] A welding frame 4 is fixedly installed at the bottom of the control box 1. A plurality of rollers are rotatably installed at the bottom of the welding frame 4. A placement table is provided on the welding frame 4 for storing the protective gas source.

[0030] The rollers at the bottom of the welding frame 4 are used to move the welding machine, leaving a placement table for placing the protective gas source, which is convenient for mobile welding. The protective gas generally uses argon, and a suitable protector is selected according to the material of the plate.

[0031] Example 2: The difference between this embodiment and the technical solution of Example 1 lies in: Refer to Figures 3 - 6 , the welding head 11 is composed of a welding part and a gas jet part. The welding part includes a first welding pipe 13 and a second welding pipe 16. The tungsten needle 17 is connected to the second welding pipe 16 and the first welding pipe 13 through a clamping assembly.

[0032] The clamping assembly includes a rotating sleeve 14 rotatably installed between the first welding pipe 13 and the second welding pipe 16. A clamping unit 18 is fixedly installed on the rotating sleeve 14. The clamping unit 18 is located inside the second welding pipe 16, and the clamping unit 18 is fixedly connected to the rotating sleeve 14. The tungsten needle 17 is fixedly connected to the clamping unit 18 in a clamping manner.

[0033] The clamping unit 18 here is an existing tungsten needle 17 clamping structure. The tungsten needle 17 is locked by rotating the rotating sleeve 14, and the length of the tungsten needle 17 can also be adjusted according to requirements. Since it is an existing structure, its specific structure and operating principle will not be described in detail here.

[0034] Embodiment 3: The difference between this embodiment and the technical solution of Embodiment 2 lies in: Refer to Figures 1 - 5 、 Figures 7 - 16 , the jetting part is fixedly installed outside the second welding pipe 16, including an annular jetting pipe 15. An inclination angle sensing and control module 8 is fixedly installed on the handle 6, and a flow rate regulating component controlled by the inclination angle sensing and control module 8 is installed on the annular jetting pipe 15.

[0035] The inclination angle sensing and control module 8 is composed of an inclination angle sensor and a control system. The inclination angle sensor transmits the inclination degree of the welding torch 3 to the control system through an electrical signal, and then controls the operation of the flow rate regulating component through the control system to achieve intelligent control. The protection gas flow rate and flow velocity control are more accurate, which is beneficial to reducing the loss of the protection gas. At the same time, it can also ensure the stable output of the protection gas, reduce the generation of welding bubbles, and improve the welding quality.

[0036] Several main reasons for TIG welding to require welding at different angles: Weld shape and aesthetics: The welding angle directly affects the appearance of the weld. Welding at different angles can make the weld have different shapes, such as V-shaped, U-shaped, flat-shaped, etc. Sometimes, adjusting the welding angle can help form a flat and uniform weld, improve the aesthetics, and avoid the appearance of unnecessary welding marks.

[0037] Heat input control: The welding angle affects the distribution of heat input. By adjusting the angle between the welding torch 3 and the workpiece surface, the heat input can be controlled to make the heat affected zone (HAZ) as small as possible, preventing overheating from causing material deformation, embrittlement, or welding defects. For example, when the welding angle is too large, the heat is concentrated in the center of the weld, which may cause the weld to overheat; when the angle is too small, the heat distribution may be uneven, affecting the welding quality.

[0038] Adaptability to welding positions: Different welding positions (such as flat welding, vertical welding, downhand welding, overhead welding, etc.) require adjusting different angles to adapt to different construction environments. For example, when welding in a vertical position, the welding angle needs to be adjusted appropriately to prevent the weld pool from being too large and causing the weld to sag. On the other hand, when welding horizontally or in the downhand direction, the welding angle needs to avoid the weld pool flowing too fast, resulting in weld defects.

[0039] Welding efficiency and operating comfort: Different welding angles not only affect the welding quality but also relate to the comfort and operating efficiency of the operator. In some cases, the operator needs to select an appropriate angle according to the size, position, and shape of the workpiece to improve work efficiency and avoid fatigue caused by maintaining the same welding posture for a long time.

[0040] Molten pool control: During the TIG welding process, the welding angle affects the flow of the molten pool during welding. An excessive angle may cause the molten pool to be unstable, resulting in uneven melting and solidification, which easily leads to welding defects such as cracks or pores. An appropriate welding angle helps to stabilize the molten pool and ensure the quality of the weld.

[0041] Gas protection effect: During the argon gas protection welding process, if the angle between the welding torch 3 and the workpiece is inappropriate, the gas protection effect may be affected. For example, an excessive welding angle may cause uneven flow of the shielding gas, resulting in the formation of oxides or contamination of the welding area, thereby affecting the welding quality.

[0042] Adaptability to different materials and thicknesses: For different materials and material thicknesses, adjustment of the welding angle is necessary. For example, thin materials may require a smaller welding angle to avoid overheating, while thick materials may require a slightly larger angle to ensure the welding depth and uniformity of heat transfer.

[0043] A pressure relief valve is installed inside the handle 6. The pressure relief valve is connected to the annular air injection pipe 15 through the injection pipe 10, and the pressure relief valve is connected to the control box 1 through the high-pressure pipe 2 and the air guide pipe 9. A control button 7 is installed on the handle 6.

[0044] The shielding gas source inputs the shielding gas into the pressure relief valve through the high-pressure pipe 2 and the air guide pipe 9 for pressure relief, and then injects the shielding gas into the annular air injection pipe 15 through the injection pipe 10. The operation of the power supply and the pressure relief valve is controlled by the control button 7.

[0045] The flow rate adjustment assembly includes a gas guide ring 23 rotatably installed on the annular air injection pipe 15. A gas blocking cover 34 is fixedly installed on the annular air injection pipe 15. A driving mechanism cooperating with the gas guide ring 23 is installed between the annular air injection pipe 15 and the gas blocking cover 34.

[0046] The driving mechanism includes a first toothed ring 24 fixedly installed on the side of the gas guide ring 23 and a second motor 20 fixedly installed on the gas blocking cover 34. A toothed disc meshing with the first toothed ring 24 is fixedly installed on the driving end of the second motor 20.

[0047] The driving end of the second motor 20 rotates to drive the toothed disc fixedly connected thereto to rotate, thereby driving the first toothed ring 24 to rotate. The rotation of the first toothed ring 24 drives the gas guide ring 23 fixedly connected thereto to rotate.

[0048] The rotation speed of the second motor 20 is controlled according to the magnitude of the protective gas flow rate, and it is also controlled by the inclination sensing control module 8. The greater the protective gas flow rate, the faster the rotation speed of the second motor 20. According to the relationship between flow rate and flow velocity, with the pressure unchanged, the greater the flow rate, the lower the flow velocity. If a constant flow velocity needs to be maintained, the flow velocity needs to be increased when the flow rate increases.

[0049] A plurality of rotating shafts 29 are rotatably installed through the gas guide ring 23, and an adjusting blade 30 is fixedly installed on each rotating shaft 29. A rotating mechanism matched with the plurality of adjusting blades 30 is installed on the gas guide ring 23.

[0050] One side of the adjusting blade 30 in contact with the gas guide ring 23 is blocked by a rubber pad, and the rubber pad will closely adhere to the side wall of the gas guide ring 23, thus playing a sealing role to prevent the protective gas from spraying out from the gap between the gas guide ring 23 and the adjusting blade 30, effectively making the spraying of the protective gas stable, avoiding the occurrence of uneven jetting caused by pulses, and improving the protection effect of the protective gas to a certain extent.

[0051] Uniform spraying of the protective gas can effectively prevent the welding area from being exposed to an uncontrolled atmosphere, thereby affecting the strength, appearance and performance of the welding, ensuring uniform strength of the welded joint, reducing defects such as pores and cracks. At the same time, the uniform distribution of the protective gas can make more effective use of the gas resources and reduce unnecessary waste.

[0052] The rotating mechanism includes a first motor 19 fixedly installed on the gas guide ring 23. A second gear 28 is fixedly installed on the driving end of the first motor 19. A second toothed ring 25 is rotatably installed outside the gas guide ring 23. A first gear 26 meshing with the second toothed ring 25 is fixedly installed on each rotating shaft 29. An incomplete toothed ring 27 meshing with the second gear 28 is fixedly installed on the second toothed ring 25.

[0053] A counterweight ring 22 is fixedly installed on the annular gas spraying pipe 15. The counterweight ring is designed with an opening and is matched with the first motor 19 for counterweight of the first motor 19 to improve the stability during welding.

[0054] The rotation of the driving end of the first motor 19 will drive the second gear 28 fixedly connected thereto to rotate, thereby driving the incomplete toothed ring 27 meshing with the second gear 28 to rotate (the first motor 19 can rotate reciprocally). The rotation of the incomplete toothed ring 27 drives the second toothed ring 25 fixedly connected thereto to rotate, thereby driving the first gear 26 meshing with the second toothed ring 25 to rotate. The rotation of the first gear 26 drives the rotating shaft 29 to rotate, so as to drive the adjusting blade 30 to rotate and change the angle of the adjusting blade 30.

[0055] The angle of the adjusting blade 30 changes, and the distance between two adjacent adjusting blades 30 changes (this principle refers to the characteristics of a parallelogram and a rectangle. Keeping the base of the parallelogram stationary and moving the upper two endpoints will make the parallelogram approach a rectangle. At this time, the height of the parallelogram will gradually increase, and vice versa). Since the pressure of the gas source is constant, the pressure after pressure relief through the pressure relief valve is also a constant value. Therefore, when the distance between the two adjusting blades 30 increases, the flow rate of the shielding gas will increase, and at this time, the flow velocity of the shielding gas will decrease.

[0056] The decrease in flow velocity will reduce the impact force of the shielding gas, thereby weakening the shielding effect of the shielding gas. Therefore, when the flow rate increases, it is necessary to accelerate the shielding gas. At this time, the driving mechanism drives the air guiding ring 23 to rotate. At this time, multiple adjusting blades 30 inside the air guiding ring 23 will all rotate with the air guiding ring 23. Since the adjusting blades 30 in the air guiding ring 23 have a certain inclination angle, all the adjusting blades 30 can be regarded as fans. By rotating the fans, the flow velocity of the shielding gas can be increased, so that the shielding gas can be sprayed with a constant flow velocity while the flow rate changes.

[0057] An adjusting cover 21 is fixedly installed on the gas baffle 34. The adjusting cover 21 is composed of multiple baffles that can rotate freely. The adjacent two baffles are arranged staggeredly, and the rotation of the baffles has a damping effect; the purpose of using damping rotation is to enable the baffles to stop at any angle and not be driven by the impact force of the shielding gas jet.

[0058] Each of the baffles is made of a one-millimeter steel plate, and each baffle is arc-shaped. The adjacent two baffles are in close contact to ensure the sealing between the adjacent two baffles, reduce the probability of air leakage, and improve the uniformity of air jetting.

[0059] By rotating the baffles on the adjusting cover 21, the diameter of the end of the circle formed by the multiple baffles is changed, so that the diameter of the end of the circle is smaller than the diameter of the gas baffle 34. When the shielding gas is ejected from the annular spray pipe 15, it will first impact on the adjusting cover 21. After being blocked by the adjusting cover 21, the peripheral shielding gas will change direction and be ejected toward the side of the tungsten needle 17. During the ejection process, it will drive the internal shielding gas to also be ejected toward the tungsten needle 17. In this way, the focus of the shielding gas jet can be changed, which is applicable to tungsten needles 17 of different lengths, and enables the shielding gas to be more accurately ejected at the welding position.

[0060] A wire mesh cover is fixedly installed between the gas baffle 34 and the annular spray pipe 15. The wire mesh cover is woven by a number of fine wires. The grid structure can play a role in dispersing the gas flow to a certain extent. When the shielding gas passes through the mesh cover, the structure of the mesh cover can guide the gas flow to a more stable and uniform direction, avoid the concentration or uneven distribution of the gas flow, and improve the flow efficiency of the shielding gas.

[0061] The collective rotation of all the above-mentioned adjusting vanes 30 can be regarded as a fan. The eddy current generated when the fan rotates will affect the injection efficiency of the shielding gas. Especially when the air flow becomes turbulent at the air inlet of the fan, it may lead to unstable eddy currents and local air flows. The grid structure of the wire mesh cover helps to break these unstable eddy currents, reduce air flow disturbance, make the air flow generated by the fan more stable, and thus improve the injection efficiency of the shielding gas.

[0062] A control vane 31 is rotatably mounted on each adjusting vane 30 through a shaft rod. The shaft rod is rotatably connected to the adjusting vane 30 and fixedly connected to the control vane 31. A third gear 33 is fixedly mounted on each shaft rod. A plurality of arc-shaped grooves are formed inside the air guide ring 23, and an arc-shaped tooth ring 32 meshing with the corresponding third gear 33 is fixedly mounted in each arc-shaped groove.

[0063] The central angle corresponding to each of the arc-shaped tooth rings 32 is 60 degrees, and the rotation angle of each rotating shaft 29 is within 60 degrees, so that the rotation angle of the control vane 31 can be controlled.

[0064] Since the adjusting vane 30 is inclined, when the shielding gas is ejected from the adjusting vane 30, the direction of the shielding gas will be changed under the action of the adjusting vane 30, so that the shielding gas is ejected along the surface of the adjusting vane 30. The ejected shielding gas will rotate in the annular spray pipe 15 to form a swirling flow. In this way, the shielding effect of the ejected shielding gas is poor. Therefore, the control vane 31 is used here to change the flow direction of the shielding gas in the annular spray pipe 15. The specific operation is as follows: As the angle of the adjusting vane 30 changes, at this time, the control vane 31 at the end of the adjusting vane 30 will also rotate together with the adjusting vane 30. The shaft rod on the control vane 31 will perform a circular motion around the rotating shaft 29. At this time, the third gear 33 on the shaft rod will also perform a circular motion along with the shaft rod. However, under the action of the arc-shaped tooth ring 32, during the circular motion of the shaft rod, it will also rotate around its own central axis, thereby driving the control vane 31 to rotate, so that the control vane 31 always remains horizontal. At this time, the shielding gas ejected from the adjusting vane 30 will pass through the control vane 31, changing the flow direction of the shielding gas, so that the shielding gas is always ejected horizontally and no eddy current is generated. In this way, the shielding effect of the shielding gas is better and the welding quality is also better.

[0065] The specific operation steps of this device are as follows: First, install the tungsten needle 17 on the welding torch 3, then clamp the welding clamp 5 on the plate to be welded, then energize, adjust the shielding gas pressure on the control box 1 to an appropriate position and then perform welding; During the welding process, the operator holds the welding torch 3. Since manual operation may cause the inclination angle of the welding torch 3 to change, at this time, the inclination angle sensing and control module 8 will sense the inclination angle of the welding torch 3, and then control the operation of the first motor 19 through the inclination angle sensing and control module 8. The rotation of the driving end of the first motor 19 will drive the second gear 28 fixedly connected thereto to rotate, thereby driving the incomplete gear ring 27 meshing with the second gear 28 to rotate. The rotation of the incomplete gear ring 27 drives the second gear ring 25 fixedly connected thereto to rotate, thereby driving the first gear 26 meshing with the second gear ring 25 to rotate. The rotation of the first gear 26 drives the rotating shaft 29 to rotate, so as to drive the adjusting blade 30 to rotate, change the angle of the adjusting blade 30, so as to control the flow rate of the protective gas ejected from the annular air jet pipe 15, be applicable to welding with different inclination angles, ensure the sufficient supply of the protective gas flow rate, and at the same time reduce the loss of the protective gas; Since the pressure of the protective gas is constant, when the flow rate increases, the flow velocity will decrease, which will affect the protection effect of the protective gas. Therefore, while the angle of the adjusting blade 30 is changed, the inclination angle sensing and control module 8 will control the operation of the second motor 20. The rotation of the driving end of the second motor 20 drives the gear disk fixedly connected thereto to rotate, thereby driving the first gear ring 24 to rotate. The rotation of the first gear ring 24 drives the air guide ring 23 fixedly connected thereto to rotate. All the adjusting blades 30 inside the air guide ring 23 will rotate together with the air guide ring 23. Since the adjusting blades 30 in the air guide ring 23 have a certain inclination angle, all the adjusting blades 30 can be regarded as fans. By the rotation of the fans, the flow velocity of the protective gas can be increased for constant-speed spraying; As the angle of the adjusting blade 30 changes, at this time, the control blade 31 at the end of the adjusting blade 30 will also rotate together with the adjusting blade 30. The shaft rod on the control blade 31 will move in a circular motion around the rotating shaft 29 seat. At this time, the third gear 33 on the shaft rod will also move in a circular motion around the shaft rod seat. However, under the action of the arc-shaped gear ring 32, during the circular motion of the shaft rod, it will also rotate around its own central axis, thereby driving the control blade 31 to rotate, so that the control blade 31 always remains horizontal. At this time, the protective gas ejected from the adjusting blade 30 will pass through the control blade 31, changing the flow direction of the protective gas, so that the protective gas is always ejected horizontally.

[0066] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An intelligent argon arc welding machine based on chassis processing, comprising a control box (1), a welding clamp (5), a shielding gas gas source, and a control button (7), characterized in that, It further includes a welding torch (3), which is composed of a handle (6) and a welding head (11). The welding head (11) is fixedly connected to the handle (6) through a docking sleeve (12). The interior of the welding head (11) contains a tungsten needle (17), and the tungsten needle (17) and a welding clamp (5) are connected to the control box (1) through wires. The welding head (11) consists of a welding part and a gas jet part. The welding part includes a first welding pipe (13) and a second welding pipe (16). The tungsten needle (17) is connected to the second welding pipe (16) and the first welding pipe (13) through a clamping assembly. The clamping assembly includes a clamping unit (18) for clamping the tungsten needle (17). The gas jet part is fixedly installed outside the second welding pipe (16) and includes an annular gas jet pipe (15). An inclination sensing control module (8) is fixedly installed on the handle (6), and a flow rate regulating assembly controlled by the inclination sensing control module (8) is installed on the annular gas jet pipe (15).

2. The intelligent argon arc welding machine based on chassis processing according to claim 1, wherein The flow rate regulating assembly includes a gas guiding ring (23) rotatably installed on the annular gas jet pipe (15). A gas blocking cover (34) is fixedly installed on the annular gas jet pipe (15), and a driving mechanism cooperating with the gas guiding ring (23) is installed between the annular gas jet pipe (15) and the gas blocking cover (34). A plurality of rotating shafts (29) are rotatably installed through the gas guiding ring (23), and an adjusting blade (30) is fixedly installed on each rotating shaft (29). A rotating mechanism cooperating with the plurality of adjusting blades (30) is installed on the gas guiding ring (23).

3. The intelligent argon arc welding machine based on chassis processing according to claim 2, characterized in that, The driving mechanism includes a first toothed ring (24) fixedly installed on the side of the gas guiding ring (23) and a second motor (20) fixedly installed on the gas blocking cover (34). A toothed disc meshing with the first toothed ring (24) is fixedly installed on the driving end of the second motor (20).

4. The intelligent argon arc welding machine based on chassis processing according to claim 2, characterized in that, The rotating mechanism includes a first motor (19) fixedly installed on the gas guiding ring (23). A second gear (28) is fixedly installed on the driving end of the first motor (19). A second toothed ring (25) is rotatably installed outside the gas guiding ring (23). A first gear (26) meshing with the second toothed ring (25) is fixedly installed on each rotating shaft (29). An incomplete toothed ring (27) meshing with the second gear (28) is fixedly installed on the second toothed ring (25).

5. The intelligent argon arc welding machine based on chassis processing according to claim 2, characterized in that, A counterweight ring (22) is fixedly installed on the annular gas jet pipe (15). The counterweight ring is designed with an opening and cooperates with the first motor (19) for counterweight of the first motor (19) to improve the stability during welding.

6. The intelligent argon arc welding machine based on chassis processing according to claim 2, characterized in that, An adjusting cover (21) is fixedly installed on the gas blocking cover (34). The adjusting cover (21) consists of a plurality of rotatable baffles. Adjacent baffles are arranged staggeredly, and the rotation of the baffles has a damping effect. A wire mesh cover is fixedly installed between the gas blocking cover (34) and the annular gas jet pipe (15).

7. The intelligent argon arc welding machine based on chassis processing according to claim 6, wherein, Each baffle is made of a one-millimeter steel plate and is arc-shaped, and adjacent baffles are closely attached to each other.

8. The intelligent argon arc welding machine based on chassis processing according to claim 2, characterized in that, A control vane (31) is rotatably mounted on each of the adjusting vanes (30) through a shaft rod, a third gear (33) is fixedly mounted on each of the shaft rods, a plurality of arc-shaped grooves are formed in the inner side of the air guide ring (23), and an arc-shaped tooth ring (32) meshing with the corresponding third gear (33) is fixedly mounted in each of the arc-shaped grooves.

9. The intelligent argon arc welding machine based on chassis processing according to claim 8, characterized in that, The central angle corresponding to each of the arc-shaped tooth rings (32) is 60 degrees, and the rotation angle of each rotating shaft (29) is within 60 degrees.

10. An intelligent argon arc welding method based on chassis processing, which is used for the intelligent argon arc welding machine based on chassis processing according to any one of claims 1-9, characterized in that, It includes the following steps: S1. First, install the tungsten needle (17) on the welding torch (3), then clamp the welding clamp (5) on the plate to be welded, then energize, adjust the protective gas pressure on the control box (1) to an appropriate position, and then perform welding; S2. Before the welding process, the operator holds the welding torch (3) and brings the tungsten needle 17 close to the weldment, then starts the welding machine. During the welding process, high-pressure protective gas is sprayed onto the welding part through the annular air pipe 15. When moving the welding torch, the inclination angle sensing control module (8) collects the angle change between the welding torch and the weldment, and controls the flow rate of the protective gas ejected from the annular air pipe (15) through the flow rate adjusting component according to the angle change, changes the protective gas spraying range, makes the protector spray more precisely on the welding part, and ensures that the protective gas is vertically sprayed on the welding part to reduce the participation of air at the welding part.

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