A welding device for aluminum plate reprocessing

Abstract

The application discloses a welding device for aluminum plate reprocessing, and relates to the technical field of aluminum plate reprocessing, which comprises a machine tool, a workbench installed on the machine tool, and an aluminum plate workpiece arranged on the upper surface of the workbench, further comprises a moving monitoring vehicle which is attached to the lower surface of the aluminum plate workpiece and can move along the welding seam and monitor whether the welding seam is penetrated in real time, a driving mechanism arranged on one side of the moving monitoring vehicle and capable of adjusting the moving speed of the moving monitoring vehicle according to the state of the welding seam, and a welding head installed on the upper surface of the aluminum plate workpiece and capable of synchronously adjusting the speed with the moving monitoring vehicle. The welding seam on the lower surface of the aluminum plate workpiece is monitored in real time through the moving monitoring vehicle, the moving speed is adjusted in real time according to the state of the welding seam, when the welding seam is penetrated, the moving monitoring vehicle and the welding head quickly move to the next welding point, otherwise, the output rotating speed is reduced until the welding seam is completely penetrated and then the moving monitoring vehicle moves. The double guide rods are arranged so that the welding head and the moving monitoring vehicle always move synchronously.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of aluminum plate reprocessing, in particular to a welding device for aluminum plate reprocessing. BACKGROUND

[0002] Aluminum plate reprocessing is a process of further processing of formed aluminum plates through a series of processes to meet different application requirements. The steps are usually adjusted according to the raw material state, processing target and application scene, and during aluminum plate reprocessing, two aluminum plates often need to be spliced together through a welding device. Welding, as one of the key processes, directly affects the strength, sealing property and appearance quality of the final product.

[0003] Common welding methods include TIG welding (tungsten inert gas welding), MIG welding (metal inert gas welding), laser welding and friction stir welding, etc. Different welding devices are used for different types of aluminum plates. After welding, necessary post-processing is usually required, such as removing welding slag, polishing the weld, performing non-destructive testing, etc., to ensure that the welded joint meets the requirements of structural strength and use environment.

[0004] At present, in the process of splicing and welding of aluminum plates, laser welding equipment is usually used: laser welding machines can provide a high concentration of energy density, causing the metal surface to rapidly heat up to the melting point, thereby realizing the melting and bonding of the material. This welding method can very accurately control the welding area, reduce the heat-affected zone, and does not require welding wire as a filler material.

[0005] However, due to the high thermal conductivity, easy oxidation and high reflectivity of aluminum plates, it is difficult for laser energy to be effectively absorbed and penetrate the material. If the welding speed is too fast or the focusing position is not appropriate, it is easy to cause incomplete penetration of the weld. Once the metal plate cannot be completely fused or penetrated, it will seriously affect the strength, sealing property and durability of the welded joint. The unpenetrated area is prone to stress concentration and is more likely to crack under external force, thereby affecting the safety and service life of the overall structure.

[0006] At present, most factories use post-weld monitoring (such as X-ray, ultrasonic, visual monitoring), which is passive follow-up quality monitoring and cannot be detected in real time. If unpenetration is found during subsequent inspection, repair work is usually required, which not only increases production costs, but also may affect material properties due to multiple heating.

[0007] In view of the above problems, it is urgent to make innovative design on the basis of the original welding device. SUMMARY

[0008] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide a welding device for aluminum plate reprocessing, thereby solving the problem mentioned in the background art where it is impossible to monitor in real time whether the weld is fully penetrated during the welding process.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a welding device for reprocessing aluminum plates, comprising a machine tool, a worktable mounted on the machine tool, and an aluminum plate workpiece disposed on the upper surface of the worktable, and further comprising a mobile monitoring vehicle attached to the lower surface of the aluminum plate workpiece, capable of moving along the weld seam and monitoring in real time whether the weld seam is fully penetrated, a drive mechanism disposed on one side of the mobile monitoring vehicle and capable of adjusting the moving speed of the mobile monitoring vehicle according to the state of the weld seam, and a welding head mounted on the upper surface of the aluminum plate workpiece and capable of adjusting its speed synchronously with the mobile monitoring vehicle;

[0010] The workbench is equipped with a guide mechanism that drives the welding head to move along the upper surface of the aluminum plate workpiece, and several limiting blocks are slidably connected to both sides of the workbench.

[0011] Preferably, the mobile monitoring vehicle includes a protective shell and wheels located on both sides of the protective shell. An electromagnet is installed inside the protective shell, and a coil is wound around the surface of the electromagnet.

[0012] Preferably, the two ends of the coil are electrically connected to the positive terminal and the negative terminal of the battery box, respectively, and a thermistor is connected between the coil and the negative terminal of the battery box. Two reels are provided below the battery box, and two wires are wound on the surface of the two reels respectively.

[0013] Preferably, the reel includes a reel and a rotating shaft mounted on the bottom of the reel. A spiral spring is installed at the lower center of the rotating shaft. One wire passes through the top of the reel and is connected to the positive terminal of the battery box, and the other wire passes through the top of the reel and is connected to the negative terminal of the battery box.

[0014] Preferably, the drive mechanism includes a servo motor, the output shaft of which is equipped with a conical rotating column, a drive shaft is inserted into the inside of the conical rotating column, and the drive shaft passes through an electromagnet and is fixedly connected to the moving wheels on both sides of the protective housing.

[0015] Preferably, a conical washer is slidably connected to the inner wall of one end of the drive shaft near the conical rotating column, a return spring is installed on one side of the conical washer, the conical washer is located inside the conical rotating column, and silicone protrusions are installed on both the outer wall of the conical washer and the inner wall of the conical rotating column.

[0016] Preferably, the guiding mechanism includes two guide rods, one of which is located on one side of the mobile monitoring vehicle and the other is located on one side of the welding head. Both guide rods have spiral grooves on their surfaces, and a lever is inserted into each spiral groove.

[0017] Preferably, the two guide rods are rotatably connected to the worktable via bearings, and a drive gear is installed at one end of each guide rod, with a driven gear meshing between the two drive gears.

[0018] Preferably, a slide rail is installed on the upper surface of the workbench, and a pulley is slidably connected to the surface of the slide rail. A slider is installed at the bottom of the pulley, and a lead screw is rotatably connected to the surface of the slider. One end of the lead screw passes through the slider and is threadedly connected to the welding head.

[0019] Preferably, each of the limiting blocks has a pressure rod slidably connected inside, and a helical spring is sleeved on the outside of the pressure rod, with the bottom of the pressure rod abutting the upper surface of the aluminum plate workpiece.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The weld seam on the lower surface of the aluminum plate workpiece is monitored in real time by a mobile monitoring vehicle. A thermistor that can sense the temperature change of the weld seam is installed in the mobile monitoring vehicle. The thermistor is located on the lower surface of the sensing area, which is aligned with the weld seam. The temperature of the weld seam on the lower surface of the aluminum plate workpiece is sensed in real time by the thermistor, and the current of the entire circuit is adjusted. This further changes the magnetic force of the electromagnet, which is reduced. The magnetic force information is transmitted to the drive mechanism in real time, and the drive mechanism adjusts the movement speed of the mobile monitoring vehicle and the welding head in real time.

[0022] In addition, the drive shaft and servo motor are connected by a conical rotating column and a conical pad. The conical pad slides along the conical rotating column under the magnetic force of the electromagnet. When the conical pad is in different positions, the friction between it and the conical rotating column is different. The greater the friction, the higher the transmitted torque and the more stable the drive shaft rotation. The smaller the friction, the lower the output speed or even stops, thus realizing the transmission ratio adjustment. The adjustment is made in real time according to the condition of the weld. When the weld has been fully melted, the magnetic force of the electromagnet increases, attracting the conical pad to move towards the narrow side of the conical rotating column. The drive shaft and the moving wheel speed up, driving the moving monitoring vehicle and the welding head to quickly move to the next welding point. Conversely, when the weld is not fully melted, the return spring pulls the conical pad to move towards the wide side of the conical rotating column, reducing the output speed, causing the moving monitoring vehicle and the welding head to move slowly until the weld is fully melted.

[0023] Furthermore, in this invention, the welding head and the mobile monitoring vehicle are synchronously transferred by the guidance mechanism. The double guide rod is set up and the gears rotate synchronously to ensure that the displacement of the two levers is consistent, which further ensures that the welding head and the mobile monitoring vehicle are synchronously displaced. This ensures that the welding head always slides along the upper surface of the weld and the mobile monitoring vehicle always moves along the lower surface of the weld. At the same time, it ensures that the positional deviation between the welding head and the mobile monitoring vehicle is not too large, avoiding the situation where the welding head is offset and thus causing incomplete welding. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the connection structure between the mobile monitoring vehicle and the aluminum plate workpiece of the present invention.

[0026] Figure 3 This is a schematic diagram of the guiding mechanism structure of the present invention.

[0027] Figure 4 This is a schematic diagram of the mobile monitoring vehicle and welding head structure of the present invention.

[0028] Figure 5 This is a schematic diagram of the internal structure of the mobile monitoring vehicle of the present invention.

[0029] Figure 6 This is a cross-sectional view of the conical rotating column and drive shaft of the present invention.

[0030] Figure 7 This is a schematic diagram of the structure of the conical rotating column and the conical gasket after disassembly.

[0031] Figure 8 This is a schematic diagram of the disassembled structure of the thread reel of the present invention.

[0032] Figure 9 For the present invention Figure 1 Enlarged structural diagram at point A in the middle.

[0033] Figure 10 For the present invention Figure 3 Enlarged structural diagram at point B.

[0034] In the diagram: 1. Machine tool; 2. Worktable; 201. Slide rail; 202. Pulley; 203. Slider; 204. Lead screw; 3. Aluminum plate workpiece; 4. Mobile monitoring vehicle; 401. Protective shell; 402. Moving wheel; 403. Electromagnet; 404. Coil; 405. Battery box; 406. Thermistor; 407. Wire; 408. Wheel; 409. Rotating shaft; 4010. Spiral spring; 5. Drive mechanism; 501. Servo motor; 502. Conical rotating column; 503. Drive shaft; 504. Conical washer; 505. Return spring; 506. Silicone convex strip; 6. Welding head; 7. Guide mechanism; 701. Guide rod; 702. Spiral groove; 703. Lever; 704. Driving gear; 705. Driven gear; 8. Limit block; 801. Pressure rod; 802. Helical spring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1 to 10 The present invention provides a technical solution: a welding device for reprocessing aluminum plates, including a machine tool 1, a worktable 2 mounted on the machine tool 1 and an aluminum plate workpiece 3 disposed on the upper surface of the worktable 2, and further including a mobile monitoring vehicle 4 attached to the lower surface of the aluminum plate workpiece 3, capable of moving along the weld and monitoring whether the weld is fully penetrated in real time, a drive mechanism 5 disposed on one side of the mobile monitoring vehicle 4 and capable of adjusting the moving speed of the mobile monitoring vehicle 4 according to the state of the weld, and a welding head 6 mounted on the upper surface of the aluminum plate workpiece 3 and capable of adjusting its speed synchronously with the mobile monitoring vehicle 4;

[0037] The workbench 2 is equipped with a guide mechanism 7 that drives the welding head 6 to move along the upper surface of the aluminum plate workpiece 3. Several limit blocks 8 are slidably connected to both sides of the workbench 2.

[0038] The weld seam of the aluminum plate workpiece 3 is monitored in real time by the mobile monitoring vehicle 4, which is attached to the lower surface of the workpiece. The status of the weld seam is monitored in real time and the information is transmitted to the drive mechanism 5. The drive mechanism 5 adjusts the position of the mobile monitoring vehicle 4 in a timely manner according to the weld seam status. If the weld seam is not fully melted, the speed of the mobile monitoring vehicle 4 is adjusted to slow it down, thereby reducing the moving speed of the welding head 6. Once the weld seam is fully melted, the welding head 6 on the mobile monitoring vehicle 4 is immediately controlled to move quickly to the next welding point to prevent over-welding and avoid affecting the surrounding material of the weld seam.

[0039] Guided by the guide mechanism 7, the welding head 6 and the mobile monitoring vehicle 4 move synchronously, ensuring that the welding head 6 slides along the upper surface of the weld and the mobile monitoring vehicle 4 moves along the lower surface of the weld. At the same time, it ensures that the positional deviation between the welding head 6 and the mobile monitoring vehicle 4 is not too large, avoiding the situation where the welding head 6 is offset and thus causes incomplete welding.

[0040] In this embodiment, as Figure 4 and Figure 5 As shown, the mobile monitoring vehicle 4 includes a protective shell 401 and moving wheels 402 located on both sides of the protective shell 401. An electromagnet 403 is installed inside the protective shell 401, and a coil 404 is wound around the surface of the electromagnet 403.

[0041] It should be noted that the protective shell 401 is made of high-temperature resistant ceramic material. Even when it comes into contact with the lower surface of the aluminum plate workpiece 3, it will not be affected by the temperature of the welding head 6, thus isolating the high temperature at the weld and preventing the internal electromagnet 403 and coil 404 from being affected by the high temperature at the weld. An opening is provided on one side of the protective shell 401, which serves to connect the drive mechanism 5 and to dissipate heat. The moving wheels 402 are respectively attached to the lower surface of the aluminum plate workpiece 3 and the upper surface of the worktable 2. When the moving wheels 402 rotate, friction is generated on the contact surface, which further drives the entire mobile monitoring vehicle 4 to move along the weld and monitor the condition of the weld in real time.

[0042] In this embodiment, as Figure 4 and Figure 5 As shown, the two ends of the coil 404 are electrically connected to the positive terminal and the negative terminal of the battery box 405, respectively, and a thermistor 406 is connected between the coil 404 and the negative terminal of the battery box 405. Two reels are provided below the battery box 405, and two wires 407 are wound on the surface of the two reels respectively.

[0043] It should be noted that the two wires 407 are spirally wound on the surface of the wheel 408. The rotation of the wheel 408 achieves the work of winding and unwinding the wires. When the mobile monitoring vehicle 4 moves away, the wheel 408 unwinds the wires, so that the thermistor 406 always maintains an electrical connection with the battery box 405.

[0044] In this embodiment, a negative temperature coefficient thermistor 406 is used, which has a lower resistance as the temperature increases. The thermistor 406 is attached to the inner wall of the protective shell 401, and a sensing area is marked on the top of the protective shell 401. The thermistor 406 is located on the lower surface of the sensing area, which is aligned with the weld. The thermistor 406 senses the temperature of the weld position on the lower surface of the aluminum plate workpiece 3 in real time, and further adjusts the current of the entire circuit.

[0045] Specifically, once the temperature is high, it indicates that the weld has been fully melted. At this time, the thermistor 406 senses the high temperature, its resistance decreases, the current passing through the coil 404 area increases, and the magnetic force of the electromagnet 403 increases. Conversely, if the weld has not been fully melted, the temperature is not as high. At this time, the current passing through the coil 404 area decreases, and the magnetic force of the electromagnet 403 decreases. The magnetic force information is transmitted to the drive mechanism 5 in real time, and the drive mechanism 5 adjusts the moving speed of the mobile monitoring vehicle 4 and the welding head 6 in real time.

[0046] In this embodiment, as Figure 8 As shown, the reel includes a reel 408 and a rotating shaft 409 mounted on the bottom of the reel 408. A spiral spring 4010 is mounted on the lower middle part of the rotating shaft 409. One wire 407 passes through the top of the reel 408 and is plugged into the positive terminal of the battery box 405. Another wire 407 passes through the top of the reel 408 and is plugged into the negative terminal of the battery box 405.

[0047] It should be noted that the rotating shaft 409 and the wheel 408 rotate together. During the process of the wheel 408 rotating to feed and retract the wire, the rotating shaft 409 and the bottom spiral spring 4010 rotate simultaneously. The spiral spring 4010 is designed to generate a certain rebound force during the feeding or retracting process of the wheel 408. During the back-and-forth movement of the mobile monitoring vehicle 4, it ensures the stable feeding and retracting of the wire 407, and prevents tangling or loosening, further enhancing the stability and reliability of the entire device.

[0048] In this embodiment, as Figure 6 and Figure 7 As shown, the drive mechanism 5 includes a servo motor 501. The output shaft of the servo motor 501 is equipped with a conical rotating column 502. The drive shaft 503 is inserted into the inside of the conical rotating column 502. The drive shaft 503 passes through the electromagnet 403 and is fixedly connected to the moving wheels 402 on both sides of the protective shell 401.

[0049] A tapered washer 504 is slidably connected to the inner wall of one end of the drive shaft 503 near the tapered rotating column 502. A return spring 505 is installed on one side of the tapered washer 504. The tapered washer 504 is located inside the tapered rotating column 502, and silicone protrusions 506 are installed on both the outer wall of the tapered washer 504 and the inner wall of the tapered rotating column 502.

[0050] It should be noted that the conical rotating column 502 has an internal cavity. The conical rotating column 502 is connected to the output shaft of the servo motor 501 and rotates synchronously with the output shaft of the servo motor 501. The end of the drive shaft 503 and the conical pad 504 are both located in the cavity of the conical rotating column 502. By changing the position of the conical pad 504, and with silicone protrusions 506 installed on both the outer wall of the conical pad 504 and the inner wall of the conical rotating column 502, the silicone protrusions 506 are used to increase the friction between the two surfaces after they come into contact. When the conical pad 504 is driven to rotate due to friction, the drive shaft 503 and the moving wheel 402 also rotate accordingly.

[0051] In addition, in this embodiment, the drive shaft 503 and the moving wheel 402 are made of high-temperature resistant ceramic material, which will not be magnetized or melted by the high temperature at the weld. The surface of the moving wheel 402 is relatively rough. After contacting the aluminum plate workpiece 3, the rotation will generate a certain friction force, driving the entire mobile monitoring vehicle 4 to move along the weld.

[0052] In addition, the conical washer 504 is made of carbon-iron alloy, which can be attracted by the electromagnet 403 and is not easily assimilated. The friction between the conical washer 504 and the conical rotating column 502 varies depending on the position of the conical washer 504. The change in friction changes the transmission ratio. The greater the friction, the higher the transmitted torque and the more stable the rotation of the drive shaft 503. The smaller the friction, the lower the output speed or even stops. In this way, the transmission ratio can be adjusted, specifically achieving the following functions:

[0053] When the weld has been fully melted, the resistance of the thermistor 406 decreases and the current increases. The magnetic force of the electromagnet 403 increases, attracting the conical pad 504 to move towards the narrow surface of the conical rotating column 502. The contact area between the conical rotating column 502 and the conical pad 504 increases, the friction increases, and the transmitted torque is higher. The drive shaft 503 and the moving wheel 402 rotate faster, driving the mobile monitoring vehicle 4 and the welding head 6 to quickly move to the next welding point.

[0054] When the weld is not fully fused, the resistance of the thermistor 406 increases, the current decreases, the magnetic force of the electromagnet 403 decreases, and the return spring 505 pulls the conical pad 504 towards the wide surface of the conical rotating column 502. The gap between the conical rotating column 502 and the conical pad 504 decreases, the friction decreases, and the output speed decreases, causing the moving monitoring vehicle 4 and the welding head 6 to move slowly until the weld is fully fused.

[0055] In this embodiment, as Figure 3 and Figure 10As shown, the guiding mechanism 7 includes two guide rods 701. One guide rod 701 is located on one side of the mobile monitoring vehicle 4, and the other guide rod 701 is located on one side of the welding head 6. Both guide rods 701 have spiral grooves 702 on their surfaces, and a lever 703 is inserted into each spiral groove 702.

[0056] The two guide rods 701 are rotatably connected to the worktable 2 via bearings, and a drive gear 704 is installed at one end of each of the two guide rods 701. A driven gear 705 meshes between the two drive gears 704.

[0057] It should be noted that the spiral grooves 702 on the surfaces of the two guide rods 701 have the same spiral shape. The lever 703 in the spiral groove 702 on the surface of the guide rod 701 located on one side of the mobile monitoring vehicle 4 is connected to the mobile monitoring vehicle 4. The mobile monitoring vehicle 4 serves as the driving force to drive the lever 703 to move axially, causing the guide rod 701 to rotate. At the same time, it drives one of the driving gears 704 to rotate. Through the meshing of the driven gear 705, it is ensured that the two driving gears 704 rotate in the same direction, further causing the other guide rod 701 to rotate. Each rotation of the guide rod 701 also causes the shaft to move. This shaft is connected to the welding head 6, further driving the welding head 6 to move.

[0058] In this example, a double guide rod 701 is used, and the synchronous rotation of gears ensures that the displacement of the two levers 703 is consistent, further ensuring that the welding head 6 and the mobile monitoring vehicle 4 are moved synchronously.

[0059] In this embodiment, as Figure 1 and Figure 4 As shown, a slide rail 201 is installed on the upper surface of the workbench 2, and a pulley 202 is slidably connected to the surface of the slide rail 201. A slider 203 is installed at the bottom of the pulley 202, and a lead screw 204 is rotatably connected to the surface of the slider 203. One end of the lead screw 204 passes through the slider 203 and is threadedly connected to the welding head 6.

[0060] It should be noted that the cooperation between pulley 202 and slide rail 201 makes the movement of slider 203 and welding head 6 smoother and prevents jamming. Slider 203 and welding head 6 are connected by lead screw 204 and limit rod. When the lead screw 204 is rotated, the welding head 6 can be vertically displaced under the action of the limit rod. The height of welding head 6 can be flexibly adjusted according to different aluminum plate thicknesses, increasing the flexibility of the welding device.

[0061] In this embodiment, as Figure 1 and Figure 9 As shown, each limiting block 8 has a sliding connection of a pressure rod 801 inside, and a helical spring 802 is sleeved on the outside of the pressure rod 801. The bottom of the pressure rod 801 is attached to the upper surface of the aluminum plate workpiece 3.

[0062] It should be noted that the side of the limiting block 8 has an opening into which the aluminum plate workpiece 3 can be inserted. When the lower surface of the aluminum plate workpiece 3 is in contact with the opening on the side of the limiting block 8, the lower surface of the aluminum plate workpiece 3 is also in contact with the moving wheel 402. Several limiting blocks 8 slide along the edge of the worktable 2 and, through the elastic force of the helical spring 802, press against the pressure rod 801, so that the lower surface of the pressure rod 801 is in close contact with the upper surface of the aluminum plate workpiece 3. The limiting blocks 8 support and limit the aluminum plate workpiece 3 to prevent displacement during the welding process.

[0063] Working principle: When using this aluminum plate reprocessing welding device, first place the aluminum plate workpiece 3 to be welded on the worktable 2. The edge of the aluminum plate workpiece 3 is clamped by the limiting block 8 to limit its position. During installation, the weld seam needs to be aligned with the detection area on the surface of the movement monitoring vehicle 4 so that the internal thermistor 406 can sense the temperature at the weld seam.

[0064] Next, adjust the height of the welding head 6 by rotating the lead screw 204. Rotating the lead screw 204 clockwise will lower the welding head 6, and vice versa. Adjust the position of the welding head 6 until it contacts the surface of the aluminum plate workpiece 3. Turn on the switch of the machine tool 1 and adjust the welding head 6 to start working. The specific operation plan belongs to the well-known technology in this field.

[0065] At the same time, the servo motor 501 is started, and the servo motor 501 starts to drive the conical rotating column 502 to rotate. Friction is generated between the conical rotating column 502 and the conical pad 504, which further drives the drive shaft 503 and the moving wheel 402 to start rotating. The moving monitoring vehicle 4 starts to move along the lower surface of the aluminum plate workpiece 3. As the moving monitoring vehicle 4 moves, the thermistor 406 inside the moving monitoring vehicle 4 starts to detect the temperature. By sensing the temperature at the weld seam through the thermistor 406, the position of the moving monitoring vehicle 4 is adjusted in real time.

[0066] Specifically, when the weld has been fully melted, the resistance of the thermistor 406 decreases, the current flowing through the coil 404 and the wire 407 increases, the magnetic force of the electromagnet 403 increases, and the magnetic force attracts and adsorbs the conical pad 504, causing the conical pad 504 to move towards the narrow surface of the conical rotating column 502. The return spring 505 is stretched, the contact area between the conical rotating column 502 and the conical pad 504 increases, the friction increases, and the moving monitoring vehicle 4 drives the lever 703 to move axially faster, which further drives the guide rod 701 on this side to rotate faster. Through the meshing transmission of the driving gear 704 and the driven gear 705, the rotation speed of the other guide rod 701 changes simultaneously, so that the moving speed of the weld head 6 on the upper surface of the aluminum plate workpiece 3 is consistent with that of the moving monitoring vehicle 4, and moves forward quickly at the same time.

[0067] Conversely, when the weld is not fully fused, the resistance of the thermistor 406 increases, the current flowing through the coil 404 and the wire 407 decreases, the magnetic force of the electromagnet 403 decreases, and the elastic force of the return spring 505 is greater than the magnetic force, pulling the conical pad 504 towards the wide surface of the conical rotating column 502. At this time, the gap and friction between the contact surfaces of the conical rotating column 502 and the conical pad 504 decrease, the output speed decreases, and the moving speed of the mobile monitoring vehicle 4 slows down. Through the guide rod 701 and the drive gear 704, the moving speed of the upper welding head 6 is also slowed down until the weld is fully fused.

[0068] Furthermore, during the movement of the mobile monitoring vehicle 4, the two wires 407 are pulled, and the rotating wheel 408 rotates to release the wires, which in turn drives the rotating shaft 409 and the bottom spiral spring 4010 to rotate simultaneously.

[0069] Finally, after the first set of aluminum plate workpieces 3 is welded, the servo motor 501 is reversed to drive the entire mobile detection vehicle to reset. At the same time, through the transmission of the guide rod 701 and the drive gear 704, the welding head 6 is reset synchronously. During the reset process, the second set of aluminum plate workpieces 3 is welded. At this time, under the elastic force of the spiral spring 4010, the wire 407 can be rewound while the mobile detection vehicle is reset to avoid the wire 407 from getting tangled. The welding of the second set of aluminum plate workpieces 3 is completed, and a new round of welding can be carried out.

[0070] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding apparatus for reprocessing aluminum plates, comprising a machine tool (1), a worktable (2) mounted on the machine tool (1), and an aluminum plate workpiece (3) disposed on the upper surface of the worktable (2), characterized in that: It also includes a mobile monitoring vehicle (4) that is attached to the lower surface of the aluminum plate workpiece (3) and can move along the weld and monitor whether the weld is fully penetrated in real time; a drive mechanism (5) located on one side of the mobile monitoring vehicle (4) that can adjust the moving speed of the mobile monitoring vehicle (4) according to the state of the weld; and a welding head (6) installed on the upper surface of the aluminum plate workpiece (3) that can adjust the speed synchronously with the mobile monitoring vehicle (4). The workbench (2) is equipped with a guide mechanism (7) that drives the welding head (6) to move along the upper surface of the aluminum plate workpiece (3). Several limiting blocks (8) are slidably connected to both sides of the workbench (2). The mobile monitoring vehicle (4) includes a protective shell (401) and moving wheels (402) on both sides of the protective shell (401). An electromagnet (403) is installed inside the protective shell (401), and a coil (404) is wound around the surface of the electromagnet (403). The coil (404) has a positive terminal and a negative terminal of the battery box (405) at its two ends respectively, and a thermistor (406) is connected between the coil (404) and the negative terminal of the battery box (405). Two reels are provided below the battery box (405), and two wires (407) are wound on the surface of the two reels respectively. The drive mechanism (5) includes a servo motor (501), the output shaft of the servo motor (501) is equipped with a conical rotating column (502), the inside of the conical rotating column (502) is connected to a drive shaft (503), and the drive shaft (503) passes through an electromagnet (403) and is fixedly connected to the moving wheels (402) on both sides of the protective shell (401). A conical pad (504) is slidably connected to the inner wall of one end of the drive shaft (503) near the conical rotating column (502). A return spring (505) is installed on one side of the conical pad (504). The conical pad (504) is located inside the conical rotating column (502), and silicone convex strips (506) are installed on both the outer wall of the conical pad (504) and the inner wall of the conical rotating column (502).

2. The welding device for reprocessing aluminum plates according to claim 1, characterized in that: The reel includes a reel (408) and a rotating shaft (409) mounted on the bottom of the reel (408). A spiral spring (4010) is installed in the lower middle part of the rotating shaft (409). One wire (407) passes through the top of the reel (408) and is plugged into the positive terminal of the battery box (405). Another wire (407) passes through the top of the reel (408) and is plugged into the negative terminal of the battery box (405).

3. The welding device for reprocessing aluminum plates according to claim 1, characterized in that: The guiding mechanism (7) includes two guide rods (701), one of which is located on one side of the mobile monitoring vehicle (4) and the other is located on one side of the welding head (6). Both guide rods (701) have spiral grooves (702) on their surfaces, and a lever (703) is inserted into each spiral groove (702).

4. The welding device for reprocessing aluminum plates according to claim 3, characterized in that: The two guide rods (701) are connected to the worktable (2) by bearings in a rotating manner, and a drive gear (704) is installed at one end of each of the two guide rods (701), and a driven gear (705) meshes between the two drive gears (704).

5. The welding device for reprocessing aluminum plates according to claim 1, characterized in that: The upper surface of the workbench (2) is equipped with a slide rail (201), and a pulley (202) is slidably connected to the surface of the slide rail (201). A slider (203) is installed at the bottom of the pulley (202), and a lead screw (204) is rotatably connected to the surface of the slider (203). One end of the lead screw (204) passes through the slider (203) and is threadedly connected to the welding head (6).

6. The welding device for reprocessing aluminum plates according to claim 1, characterized in that: Each of the limiting blocks (8) has a sliding connection of a pressure rod (801) inside, and a helical spring (802) is sleeved on the outside of the pressure rod (801). The bottom of the pressure rod (801) is attached to the upper surface of the aluminum plate workpiece (3).

Images