An intelligent argon arc welding machine and welding method based on chassis processing

Abstract

The present invention discloses an intelligent argon arc welding machine and welding method based on chassis processing, which relates to the technical field of chassis processing. The machine comprises a control box and a welding clamp, and also comprises a welding gun, wherein the welding gun is composed of a handle and a welding head, and the welding head and the handle are fixedly connected by a docking sleeve; the welding head is composed of a welding portion and an air injection portion, and the welding portion comprises a first welding pipe and a second welding pipe. The advantages are: when performing plate welding, the present invention can automatically change the delivery flow of the protector according to the inclination angle of the welding gun, so that the protector is delivered at an optimal flow rate, improve the protection effect of the protector, reduce the loss of the shielding gas, and at the same time maintain a constant shielding gas injection speed during the shielding gas change process, reduce the probability of bubble generation, and improve welding quality. In addition, when the shielding gas is injected, the protector is always injected perpendicularly to the welding position, which is conducive to improving the protection effect of the shielding gas.

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 cutting, stamping, welding and grinding processes. The welding process is to weld the plates after cutting and stamping. Due to the thin thickness of the plates, argon arc welding 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 gun and a welding clamp. When welding, the welding clamp is used to energize the plate. The welding gun is provided with a nozzle to spray shielding gas to the welding position during welding to protect the welding position and prevent it from oxidation. In the prior art, the welding gun 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 because the nozzle only adopts a single tubular structure, it is unable to optimize the flow of shielding gas. As a result, in different welding environments or for welds of different sizes, a large amount of argon gas needs to be continuously delivered to prevent oxidation of the welding material, which can easily cause argon gas waste or unstable shielding gas flow.

[0004] Therefore, the announcement number CN118404170B discloses a DC pulse argon arc welding machine, which includes a welding machine power supply box, one side of which is provided with an operation panel, the welding machine power supply box is provided with a welding gun negative electrode interface and a ground wire interface, and the ground wire interface is connected to a ground wire clamp; an argon gas tank is provided on one side of the welding machine power supply box, the upper end of the argon gas tank is connected to a gas pipe through a flow meter, and a gas input port is provided on one side of the welding machine power supply box; the welding gun negative electrode interface is connected to a welding gun tube, and a gas connecting pipe is provided outside the welding gun tube; a gas output port is provided on the welding machine power supply box, and the other end of the gas connecting pipe is connected to the gas output port; a welding gun mechanism is connected to the welding gun tube.

[0005] The welding gun mechanism used in the above-mentioned welding machine can deliver argon gas through the ventilation component in an optimal gas supply action according to the size of the weld and the environmental conditions during the welding work (ambient air flow speed, temperature and humidity, etc.). This not only ensures that the argon gas delivery volume during the welding process meets the rated demand, but also effectively reduces argon gas waste and ensures welding quality.

[0006] However, in the above-mentioned and existing welding machines, the nozzle head controls its jet flow rate through the body. However, for the welding angle of the welding gun, different shielding gas flow rates are required for welding at different angles. Because the nozzle head sprays gas at different angles, if a constant flow rate is used for jetting, the impact force between the gas sprayed from the tilted nozzle head and the workpiece will be less than the jet impact force of the vertical nozzle head. As the angle changes, the impact force changes, and bubbles will be generated in the welding due to unstable shielding gas spraying.

[0007] Therefore, a new type of intelligent argon arc welding machine and welding method based on chassis processing can be used to solve the shortcomings of the existing technology. Summary of the Invention

[0008] The purpose of the present invention is to solve the problems existing in the prior art and to propose an intelligent argon arc welding machine and a welding method based on chassis processing.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] An intelligent argon arc welding machine based on chassis processing includes a control box and a welding clamp, and also includes a welding gun. The welding gun consists of a handle and a welding head. The welding head and the handle are fixedly connected by a docking sleeve. The welding head contains a tungsten needle. The tungsten needle and the welding clamp are connected to the control box by a wire.

[0011] The welding head consists of a welding part and an air 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 air jet part is fixedly installed on the outside of the second welding pipe and includes an annular air jet pipe. A tilt sensing control module is fixedly installed on the handle, and a flow regulating assembly controlled by the tilt sensing control module is installed on the annular air jet pipe.

[0012] Preferably, the flow regulating assembly comprises an air guide ring rotatably mounted on an annular air injection pipe, an air shield is fixedly mounted on the annular air injection pipe, and a driving mechanism cooperating with the air guide ring is mounted between the annular air injection pipe and the air shield;

[0013] A plurality of rotating shafts are rotatably mounted on the air guide ring, an adjusting blade is fixedly mounted on each of the rotating shafts, and a rotating mechanism matched with the plurality of adjusting blades is mounted on the air guide ring.

[0014] Preferably, the driving mechanism includes a first gear ring fixedly mounted on the side of the air guide ring and a second motor fixedly mounted on the air shield, and a gear disk meshing with the first gear ring is fixedly mounted on the driving end of the second motor.

[0015] Preferably, the rotating mechanism includes a first motor fixedly mounted on the air guide ring, a second gear fixedly mounted on the driving end of the first motor, a second gear ring rotatably mounted on the outside of the air guide ring, a first gear meshing with the second gear ring fixedly mounted on each of the rotating shafts, and an incomplete gear ring meshing with the second gear fixedly mounted on the second gear ring.

[0016] Preferably, a counterweight ring is fixedly mounted on the annular air jet pipe. The counterweight ring is designed to be open and cooperates with the first motor to serve as a counterweight for the first motor, thereby improving stability during welding.

[0017] Preferably, an adjustment cover is fixedly installed on the air shield, and the adjustment cover is composed of a plurality of freely rotatable baffles, which are staggered between adjacent baffles, and the rotation of the baffles has a damping effect. A wire mesh cover is fixedly installed between the air shield and the annular air injection pipe.

[0018] Preferably, each of the baffles is made of a one-millimeter steel plate, and each baffle is arc-shaped, with two adjacent baffles being tightly attached to each other.

[0019] Preferably, a control blade is rotatably mounted on each of the adjusting blades via a shaft, a third gear is fixedly mounted on each of the shafts, a plurality of arc-shaped grooves are provided on the inner side of the air guide ring, and an arc-shaped gear ring meshing with the corresponding third gear is fixedly mounted in each of the arc-shaped grooves.

[0020] Preferably, the central angle corresponding to each of the arc-shaped gear rings is sixty degrees, and the rotation angle of each rotating shaft is within sixty degrees.

[0021] The present invention also provides an intelligent argon arc welding method based on chassis processing, comprising the above-mentioned intelligent argon arc welding machine based on chassis processing, and further comprising the following steps:

[0022] S1. First, install the tungsten needle (17) on the welding gun (3), then clamp the welding clamp (5) on the plate to be welded, then turn on the power, adjust the shielding gas pressure on the control box (1) to an appropriate position and then weld;

[0023] S2. Before the welding process, the operator holds the welding gun (3) and places the tungsten needle 17 close to the weldment, and then starts the welding machine. During the welding process, high-pressure shielding gas is sprayed to the welding part through the annular jet pipe 15. When the welding gun is moved, the tilt sensor control module (8) collects the angle change between the welding gun and the weldment, and controls the flow rate of the shielding gas sprayed out of the annular jet pipe (15) through the flow regulating component according to the angle change, changes the shielding gas spray range, makes the shielding gas spray more accurately at the welding part, and ensures that the shielding gas is sprayed vertically at the welding part, thereby reducing the participation of air in the welding part.

[0024] Compared with the existing technology, the advantages of the present invention are:

[0025] 1. When this welder is performing plate welding, the inclination angle of the welding gun is sensed by the inclination sensor control module, and the angle of the adjustment blade is changed according to the size of the inclination angle to control the flow of shielding gas, thereby ensuring sufficient supply of shielding gas and reducing the loss of shielding gas, so that the shielding gas can be sprayed more stably at the welding position, reducing the probability of welding bubbles and oxidation of the welding part, and improving the welding quality.

[0026] 2. When the welder is performing plate welding, a second motor is provided to drive the air guide to rotate in a circle around the annular air jet tube. The rotation of the air guide ring drives the adjustment blades on the air guide ring to rotate. Multiple adjustment blades form a fan. The rotation of the fan accelerates the flow rate of the shielding gas in the annular air jet tube, so that the shielding gas is sprayed at the welding position at a constant flow rate, which can maintain the stability of the arc, ensure the stable shape of the arc during welding, and avoid arc jumping or uneven fluctuations.

[0027] 3. When this welder is performing plate welding, a control blade is set, and during the process of adjusting the blade angle, the blade automatically changes its angle so that the control blade is always parallel to the annular air jet tube. In this way, the ejected shielding gas hits the welding part vertically, and the shielding gas can be more accurately delivered directly 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 weld metal. Since the direction of the airflow is more consistent with the alignment of the welding area, the vertical jet airflow can effectively reduce the diffusion and loss of the shielding gas, thereby improving the protective effect of the shielding gas.

[0028] To sum up, when performing plate welding, the present invention can automatically change the delivery flow rate of the protector according to the inclination angle of the welding gun, so that the protector can be delivered at an optimal flow rate, thereby improving the protection effect of the protector and reducing the loss of the shielding gas. At the same time, the shielding gas injection speed can be maintained constant during the change of the shielding gas, thereby reducing the probability of bubble generation and improving the welding quality. In addition, when the shielding gas is injected, the protector is always sprayed vertically to the welding position, which is beneficial to improving the protection effect of the shielding gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a structural diagram of an intelligent argon arc welding machine based on chassis processing proposed by the present invention;

[0031] Figure 2 for Figure 1 Detailed schematic diagram of the structure after rotation at a certain angle;

[0032] Figure 3 for Figure 2 Detailed diagram of the structure after the welding gun is rotated to a certain angle;

[0033] Figure 4 for Figure 3 Enlarged structural schematic details of the middle welding head, gas injection pipe and butt joint sleeve;

[0034] Figure 5 for Figure 4 Enlarged structural schematic detail of the middle welding part;

[0035] Figure 6 for Figure 5 Detailed schematic diagram of the exploded structure;

[0036] Figure 7 for Figure 4 A detailed diagram of the enlarged structure of the middle jet section;

[0037] Figure 8 for Figure 7 Detailed schematic drawing of the plan structure along one of the angles;

[0038] Figure 9 for Figure 8 Detailed schematic diagram of the three-dimensional structure along the AA section;

[0039] Figure 10 for Figure 9 A detailed diagram of the enlarged structure of the middle adjustment cover;

[0040] Figure 11 for Figure 9 A detailed diagram of the enlarged structure of the first motor, the second motor, the counterweight ring and other components;

[0041] Figure 12 for Figure 11 Detailed schematic diagram of the exploded structure;

[0042] Figure 13 for Figure 12 A detailed diagram of the enlarged structure of the first motor and the second gear ring;

[0043] Figure 14 for Figure 13 An enlarged schematic diagram of the structure of the rotating shaft, the regulating blade and the first gear;

[0044] Figure 15 for Figure 14 A schematic detailed diagram of the planar structure of one of the rotating shafts, the adjusting blades, the first gear and other components along one of the angles;

[0045] Figure 16 for Figure 9 Detailed diagram of the enlarged structure of the central annular jet pipe and the air shield.

[0046] In the figure: 1 control box, 2 high-pressure pipe, 3 welding gun, 4 welding frame, 5 welding clamp, 6 handle, 7 control button, 8 tilt sensor control module, 9 air guide pipe, 10 air injection pipe, 11 welding head, 12 docking sleeve, 13 first welding pipe, 14 rotating sleeve, 15 annular air 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 gear ring, 25 second gear ring, 26 first gear, 27 incomplete gear ring, 28 second gear, 29 rotating shaft, 30 adjustment blade, 31 control blade, 32 arc gear ring, 33 third gear, 34 air shield. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] Example 1: Reference Figure 1-Figure 5 An intelligent argon arc welding machine based on chassis processing includes a control box 1 and a welding clamp 5, as well as a welding gun 3. The welding gun 3 consists of a handle 6 and a welding head 11. The welding head 11 is fixedly connected to the handle 6 by a docking sleeve 12. 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 a wire.

[0049] 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 size as needed, affecting the heat input and welding effect of welding; the use of inverter technology can provide a more stable current, and has higher efficiency and smaller size.

[0050] The tungsten needle 17 has good conductivity and can maintain a stable arc under the protection of argon gas. During 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. There will be no arc flickering or instability during the welding process, which can ensure the welding quality.

[0051] The output cable is connected to the wire, and cooperates with the power supply to provide current to 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 molten welding wire drips on the welding point, thereby achieving the purpose of welding adhesion.

[0052] 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 a shielding gas source.

[0053] The rollers at the bottom of the welding frame 4 are used to move the welder, leaving a platform for placing the shielding gas source to facilitate mobile welding. The shielding gas is generally argon, and a suitable protector is selected according to the material of the plate.

[0054] Example 2: This example differs from the example 1 in that: Figure 3-Figure 6 The welding head 11 is composed of a welding part and an air jet part. The welding part includes a first welding tube 13 and a second welding tube 16. The tungsten needle 17 is connected to the second welding tube 16 and the first welding tube 13 through a clamping assembly.

[0055] The clamping assembly includes a rotating sleeve 14 rotatably mounted between the first welding pipe 13 and the second welding pipe 16. A clamping unit 18 is fixedly mounted on the rotating sleeve 14. The clamping unit 18 is located inside the second welding pipe 16 and is fixedly connected to the rotating sleeve 14. The tungsten needle 17 is fixedly connected to the clamping unit 18 by a clamping engagement.

[0056] The clamping unit 18 here is an existing tungsten needle 17 clamping structure, which locks the tungsten needle 17 by rotating the rotating sleeve 14, and can also adjust the length of the tungsten needle 17 according to needs. Since it is an existing structure, its specific structure and operating principle are not described in detail here.

[0057] Example 3: This example differs from the technical solution of Example 2 in that: Figure 1-Figure 5 、 Figures 7-16 The air jet part is fixedly mounted on the outside of the second welding pipe 16 and includes an annular air jet pipe 15. The handle 6 is fixedly mounted with a tilt sensor control module 8. The annular air jet pipe 15 is mounted with a flow regulating component controlled by the tilt sensor control module 8.

[0058] The inclination sensor control module 8 is composed of an inclination sensor and a control system. The inclination sensor transmits the inclination degree of the welding gun 3 to the control system through an electrical signal, and then controls the operation of the flow regulating component through the control system to realize intelligent control. The shielding gas flow and flow rate control are more precise, which is conducive to reducing the loss of shielding gas. At the same time, it can also ensure the stable output of shielding gas, reduce the generation of welding bubbles, and improve welding quality.

[0059] There are several main reasons why argon arc welding requires welding at different angles:

[0060] Weld shape and aesthetics: The welding angle directly affects the appearance of the weld. Welding at different angles can produce welds with different shapes, such as V-shaped, U-shaped, flat, etc. Sometimes, adjusting the welding angle can help form a flat and uniform weld, improve the aesthetics, and avoid unnecessary weld marks.

[0061] Heat input control: The welding angle affects the distribution of heat input. By adjusting the angle between the welding gun 3 and the workpiece surface, the heat input can be controlled to minimize the heat-affected zone (HAZ) and prevent overheating from causing material deformation, embrittlement, or welding defects. For example, if the welding angle is too large, the heat is concentrated in the center of the weld, which may cause the weld to overheat; if the angle is too small, the heat distribution may be uneven, affecting the welding quality.

[0062] Adaptability of welding position: Different welding positions (such as flat welding, vertical welding, bottom welding, top welding, etc.) require 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 molten pool from being too large and causing the weld to sag. On the other hand, when welding horizontally or downward, the welding angle needs to avoid the molten pool flowing too fast, which may cause weld defects.

[0063] Welding efficiency and operating comfort: Different welding angles not only affect welding quality, but are also related to the operator's comfort and operating efficiency. In some cases, the operator needs to choose a suitable angle based on 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.

[0064] Molten pool control: During the argon arc welding process, the welding angle will affect the flow of the molten pool during welding. Too large an angle may cause the molten pool to be unstable, resulting in uneven melting and solidification, which can easily lead to welding defects such as cracks or holes. The appropriate welding angle helps to stabilize the molten pool and ensure the quality of the weld.

[0065] Gas shielding effect: During argon shielded welding, if the angle between the welding gun 3 and the workpiece is not appropriate, the gas shielding effect may be affected. For example, an excessively large 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.

[0066] 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 uniform welding depth and heat transfer.

[0067] 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 air injection pipe 10. 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.

[0068] 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 injection pipe 15 through the gas injection pipe 10. The power supply and the operation of the pressure relief valve are controlled by the control button 7.

[0069] The flow regulating assembly includes an air guide ring 23 rotatably mounted on the annular air injection pipe 15 , an air shield 34 fixedly mounted on the annular air injection pipe 15 , and a driving mechanism matched with the air guide ring 23 is installed between the annular air injection pipe 15 and the air shield 34 .

[0070] The driving mechanism includes a first gear ring 24 fixedly mounted on the side of the air guide ring 23 and a second motor 20 fixedly mounted on the air shield 34 . A gear disc meshing with the first gear ring 24 is fixedly mounted on the driving end of the second motor 20 .

[0071] The driving end of the second motor 20 rotates to drive 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.

[0072] The speed of the second motor 20 is controlled according to the size of the protective gas flow rate, and is also controlled by the inclination sensor control module 8. The greater the protective gas flow rate, the faster the speed of the second motor 20. According to the relationship between flow rate and flow velocity, the pressure remains 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.

[0073] A plurality of rotating shafts 29 are rotatably mounted on the air guide ring 23 , and an adjusting blade 30 is fixedly mounted on each rotating shaft 29 . A rotating mechanism that cooperates with the plurality of adjusting blades 30 is mounted on the air guide ring 23 .

[0074] The side where the regulating blade 30 is in contact with the air guide ring 23 is blocked by a rubber pad. The rubber pad will stick to the side wall of the air guide ring 23, which acts as a seal to prevent the protective gas from being ejected from the gap between the air guide ring 23 and the regulating blade 30. It can effectively stabilize the spraying of the protective gas, avoid the occurrence of uneven jetting caused by pulses, and improve the protective effect of the protective gas to a certain extent.

[0075] Uniform spraying of shielding gas can effectively prevent the welding area from being exposed to uncontrolled atmosphere, which in turn affects the strength, appearance and performance of the weld, ensures uniform strength of the weld joint, and reduces defects such as pores and cracks. At the same time, the shielding gas is evenly distributed, which can more effectively utilize gas resources and reduce unnecessary waste.

[0076] The rotating mechanism includes a first motor 19 fixedly mounted on the air guide ring 23, a second gear 28 fixedly mounted on the driving end of the first motor 19, a second gear ring 25 rotatably mounted on the outside of the air guide ring 23, a first gear 26 meshing with the second gear ring 25 fixedly mounted on each rotating shaft 29, and an incomplete gear ring 27 meshing with the second gear 28 fixedly mounted on the second gear ring 25.

[0077] A counterweight ring 22 is fixedly mounted on the annular air jet pipe 15 . The counterweight ring is open and cooperates with the first motor 19 to serve as a counterweight for the first motor 19 , thereby improving stability during welding.

[0078] The rotation of the driving end of the first motor 19 will drive the second gear 28 fixedly connected to it to rotate, thereby driving the incomplete gear ring 27 meshing with the second gear 28 to rotate (the first motor 19 can rotate reciprocatingly). The rotation of the incomplete gear ring 27 drives the second gear ring 25 fixedly connected to it 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, thereby driving the adjusting blade 30 to rotate, thereby changing the angle of the adjusting blade 30.

[0079] The angle of the regulating blade 30 changes, and the distance between two adjacent regulating blades 30 changes (this principle refers to the characteristics of a parallelogram and a rectangle. Keeping the bottom side of the parallelogram stationary and moving the two upper end points 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 the pressure is released by the pressure relief valve is also a constant value. Therefore, the increase in the distance between the two regulating blades 30 will increase the flow rate of the shielding gas, and the flow rate of the shielding gas will decrease.

[0080] A decrease in flow rate will reduce the impact force of the shielding gas, thereby weakening the protective effect of the shielding gas. Therefore, when the flow rate increases, the shielding gas needs to be accelerated. At this time, the air guide ring 23 is driven to rotate by the above-mentioned driving mechanism. At this time, the multiple adjustment blades 30 inside the air guide ring 23 will rotate with the air guide ring 23. Since the adjustment blades 30 in the air guide ring 23 have a certain inclination angle, all the adjustment blades 30 can be regarded as fans. The rotation of the fan can increase the flow rate of the shielding gas, so that the shielding gas can be sprayed with a constant flow rate and a changing flow rate.

[0081] An adjustment cover 21 is fixedly mounted on the air shield 34. The adjustment cover 21 is composed of a plurality of freely rotatable baffles. Adjacent baffles are arranged alternately, and the rotation of the baffles has a damping effect. The purpose of adopting damped rotation is to enable the baffles to stop at any angle and not be driven by the impact force of the protective gas injection.

[0082] Each of the baffles is made of a one-millimeter steel plate, and each baffle is arc-shaped. The adjacent baffles are tightly attached to each other, ensuring the sealing between the adjacent baffles, reducing the probability of air leakage, and improving the uniformity of the jet.

[0083] By rotating the baffle on the adjustment cover 21, the diameter of the end of the circle surrounded by multiple baffles is changed, so that the diameter of the end of the circle is smaller than the diameter of the gas shield 34. When the shielding gas is ejected from the annular injection pipe 15, it will first impact the adjustment cover 21. After being blocked by the adjustment cover 21, the outer shielding gas will change direction and be ejected toward one side of the tungsten needle 17. During the ejection process, the internal shielding gas will also be ejected toward the tungsten needle 17. In this way, the focus of the shielding gas injection can be changed, which is suitable for tungsten needles 17 of different lengths, so that the shielding gas can be more accurately ejected at the welding position.

[0084] A wire mesh cover is fixedly installed between the air shield 34 and the annular air injection pipe 15. The wire mesh cover is made of several fine steel wires interwoven. The grid structure can disperse the airflow to a certain extent. When the protective gas passes through the mesh cover, the structure of the mesh cover can guide the airflow to a more stable and uniform direction, avoiding airflow concentration or uneven distribution, and improving the flow efficiency of the protective gas.

[0085] All the above-mentioned regulating blades 30 rotating together can be regarded as a fan. The vortex generated by the fan when rotating will affect the injection efficiency of the shielding gas, especially when the airflow is turbulent at the air inlet of the fan, which may cause vortex and local airflow instability. The grid structure of the wire mesh cover helps to break these unstable vortexes, reduce airflow disturbances, and make the airflow generated by the fan smoother, thereby improving the injection efficiency of the shielding gas.

[0086] A control blade 31 is rotatably mounted on each adjusting blade 30 via a shaft. The shaft is rotationally connected to the adjusting blade 30 and fixedly connected to the control blade 31. A third gear 33 is fixedly mounted on each shaft. A plurality of arcuate grooves are provided on the inner side of the air guide ring 23. An arcuate gear ring 32 meshing with the corresponding third gear 33 is fixedly mounted in each arcuate groove.

[0087] The central angle of each arc-shaped gear ring 32 is sixty degrees, and the rotation angle of each rotating shaft 29 is within sixty degrees, so that the rotation angle of the blade 31 can be controlled.

[0088] Since the regulating blade 30 is designed to be inclined, when the shielding gas is ejected from the regulating blade 30, the direction of the shielding gas will be changed under the action of the regulating blade 30, so that the shielding gas is ejected along the surface of the regulating blade 30. The ejected shielding gas will rotate in the annular air injection pipe 15 to form a vortex. The shielding effect of the shielding gas ejected in this way is poor. Therefore, the control blade 31 is used here to change the flow direction of the shielding gas in the annular air injection pipe 15. The specific operation is as follows:

[0089] As the angle of the adjusting blade 30 changes, the control blade 31 at the end of the adjusting blade 30 will also rotate with the adjusting blade 30, and the shaft on the control blade 31 will move in a circle around the rotating shaft 29. At this time, the third gear 33 on the shaft will also move in a circle with the shaft seat, but under the action of the arc-shaped gear ring 32, the shaft will also rotate around its own central axis during the circular motion, thereby driving the control blade 31 to rotate, so that the control blade 31 always remains horizontal. At this time, the shielding gas ejected from the adjusting blade 30 will pass through the control blade 31, changing the flow direction of the shielding gas so that the shielding gas is always ejected horizontally without generating eddy currents. In this way, the protective effect of the shielding gas is better and the welding quality is also better.

[0090] The specific operating steps of this device are as follows:

[0091] First, install the tungsten needle 17 on the welding gun 3, then clamp the welding clamp 5 on the plate to be welded, then turn on the power, adjust the shielding gas pressure on the control box 1 to the appropriate position and then start welding;

[0092] During the welding process, the operator holds the welding gun 3. Due to manual operation, the inclination angle of the welding gun 3 will change. At this time, the inclination sensor control module 8 will sense the inclination angle of the welding gun 3, and then control the first motor 19 to operate through the inclination sensor 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, thereby driving the adjustment blade 30 to rotate, changing the angle of the adjustment blade 30, thereby controlling the flow rate of the shielding gas ejected from the annular air injection pipe 15. This is suitable for welding with different inclination angles, ensuring sufficient supply of shielding gas flow, and also reducing the loss of shielding gas.

[0093] Since the pressure of the shielding gas is constant, the flow rate increases and the flow velocity decreases, which will affect the shielding effect of the shielding gas. Therefore, while the angle of the adjusting blade 30 changes, the inclination sensor control module 8 controls the operation of the second motor 20. The driving end of the second motor 20 rotates to drive 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. The multiple adjusting blades 30 inside the air guide ring 23 will all rotate 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. The rotation of the fan can increase the flow velocity of the shielding gas, so as to facilitate constant-speed injection.

[0094] As the angle of the adjusting blade 30 changes, the control blade 31 at the end of the adjusting blade 30 will also rotate with the adjusting blade 30, and the shaft on the control blade 31 will move in a circle around the rotating shaft 29. At this time, the third gear 33 on the shaft will also move in a circle with the shaft seat, but under the action of the arc-shaped gear ring 32, the shaft will also rotate around its own central axis during the circular motion, 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.

[0095] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An intelligent argon arc welding machine based on chassis processing, comprising a control box (1) and a welding clamp (5), characterized in that: The device also includes a welding gun (3), the welding gun (3) consisting of a handle (6) and a welding head (11), the welding head (11) and the handle (6) being fixedly connected via a docking sleeve (12), the welding head (11) containing a tungsten needle (17), the tungsten needle (17) and the welding clamp (5) being connected to the control box (1) via a wire; The welding head (11) is composed of a welding part and an air jet part, wherein the welding part includes a first welding tube (13) and a second welding tube (16), and the tungsten needle (17) is connected to the second welding tube (16) and the first welding tube (13) through a clamping assembly; the air jet part is fixedly mounted on the outside of the second welding tube (16), and includes an annular air jet tube (15), a tilt sensor control module (8) is fixedly mounted on the handle (6), and a flow regulating assembly controlled by the tilt sensor control module (8) is mounted on the annular air jet tube (15); The flow regulating assembly comprises an air guide ring (23) rotatably mounted on an annular air jet pipe (15), an air shield (34) fixedly mounted on the annular air jet pipe (15), and a driving mechanism matched with the air guide ring (23) mounted between the annular air jet pipe (15) and the air shield (34); A plurality of rotating shafts (29) are rotatably mounted on the air guide ring (23), an adjusting blade (30) is fixedly mounted on each of the rotating shafts (29), and a rotating mechanism that cooperates with the plurality of adjusting blades (30) is mounted on the air guide ring (23); A control blade (31) is rotatably mounted on each of the regulating blades (30), a third gear (33) is fixedly mounted on each of the shafts, a plurality of arcuate grooves are formed on the inner side of the air guide ring (23), and an arcuate gear ring (32) meshing with the corresponding third gear (33) is fixedly mounted in each of the arcuate grooves; A welding frame (4) is fixedly mounted on the bottom of the control box (1), a plurality of rollers are rotatably mounted on the bottom of the welding frame (4), and a placement table is provided on the welding frame (4) for storing a protective gas source.

2. The intelligent argon arc welding machine based on chassis processing according to claim 1 is characterized in that: The clamping assembly includes a rotating sleeve (14) rotatably mounted between a first welding pipe (13) and a second welding pipe (16); a clamping unit (18) is fixedly mounted on the rotating sleeve (14); the clamping unit (18) is located inside the second welding pipe (16); and the tungsten needle (17) is fixedly connected to the clamping unit (18).

3. The intelligent argon arc welding machine based on chassis processing according to claim 1 is characterized in that: A pressure relief valve is installed inside the handle (6), and the pressure relief valve is connected to the annular air injection pipe (15) through an air injection pipe (10). The pressure relief valve is connected to the control box (1) through a high-pressure pipe (2) and an air guide pipe (9). A control button (7) is installed on the handle (6).

4. The intelligent argon arc welding machine based on chassis processing according to claim 1, characterized in that: The driving mechanism comprises a first gear ring (24) fixedly mounted on the side of the air guide ring (23), a second motor (20) fixedly mounted on the air shield (34), and a gear disc meshing with the first gear ring (24) fixedly mounted on the driving end of the second motor (20).

5. The intelligent argon arc welding machine based on chassis processing according to claim 1 is characterized in that: The rotating mechanism comprises a first motor (19) fixedly mounted on an air guide ring (23), a second gear (28) fixedly mounted on a driving end of the first motor (19), a second gear ring (25) rotatably mounted on the outside of the air guide ring (23), a first gear (26) meshing with the second gear ring (25) fixedly mounted on each of the rotating shafts (29), and an incomplete gear ring (27) meshing with the second gear (28) fixedly mounted on the second gear ring (25).

6. The intelligent argon arc welding machine based on chassis processing according to claim 1, characterized in that: An adjustment cover (21) is fixedly mounted on the air shield (34). The adjustment cover (21) is composed of a plurality of freely rotatable baffles, with adjacent baffles being arranged alternately. A wire mesh cover is fixedly mounted between the air shield (34) and the annular air injection pipe (15).

7. An intelligent argon arc welding method based on chassis processing, used for the intelligent argon arc welding machine based on chassis processing according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. First, install the tungsten needle (17) on the welding gun (3), then clamp the welding clamp (5) on the plate to be welded, then turn on the power, adjust the shielding gas pressure on the control box (1) to an appropriate position and then weld; S2. During the welding process, the operator holds the welding gun (3). Due to manual operation, the inclination angle of the welding gun (3) will change. At this time, the inclination sensor control module (8) will sense the inclination angle of the welding gun (3) and control the operation of the flow regulating component. The flow regulating component is used to control the flow rate of the shielding gas ejected from the annular jet pipe (15). It is suitable for welding with different inclination angles, ensuring sufficient supply of shielding gas flow, and also reducing the loss of shielding gas.

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