Laser welding equipment

Abstract

The invention relates to the field of laser welding, and discloses laser welding equipment which comprises a laser provided with a handheld laser welding gun, a mounting box fixedly mounted at the bottom of the laser, a wire feeding mechanism arranged in the mounting box, a driving rod slidably mounted on the mounting box, a clamping mechanism fixedly mounted on the driving rod, and a speed change mechanism fixedly mounted on the mounting box. In the process that the driving rod conveys the welding wires with different sizes through the clamping mechanism, the conveying speed is synchronously changed; the auxiliary mechanism comprises a pressing wheel, and the pressing wheel adjusts the speed change mechanism according to the actual size of the welding wire. The inserting connection of the limiting column and the wire spool inserting groove can be easily controlled by rotating the first screw rod, and welding wires of different sizes can be rapidly switched; when the driving rod moves to switch the welding wire, the adjusting plate drives the pressing rod to extrude the water source, so that the rotating disc rotates, and the position of the contact tube is automatically adjusted; the tedious operation of manually replacing the welding wire reel and adjusting the contact tube is avoided, and it is guaranteed that welding wires of different sizes can be accurately in butt joint with the laser welding gun.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and more particularly to a laser welding device. Background Art

[0002] As an advanced welding technology, laser welding is widely used in modern manufacturing. It uses a high-energy-density laser beam to quickly melt and fuse the weld materials. It has the advantages of fast welding speed, small heat-affected zone, and high weld quality. It is widely used in many fields such as automobile manufacturing, electronic equipment production, aerospace, etc.

[0003] In actual welding work scenarios, different welding needs have very different requirements for welding wires. For example, in automobile manufacturing, the thickness of the plates in different parts of the car body is different. For welding thicker frame components, larger diameter welding wires are required to ensure sufficient deposited metal and ensure that the welding strength can meet the mechanical performance requirements when the car is driving. When welding precision components of electronic equipment, because the components are light and thin, fine welding wires must be used to avoid burn-through.

[0004] However, in actual operation, existing laser welding equipment often requires workers to spend a lot of time manually changing the wire reel, which is cumbersome and inefficient, seriously affecting the production progress; and the existing wire feeding mechanism cannot automatically match the appropriate feeding speed when conveying welding wires of different sizes; when the diameter of the welding wire changes, if the wire feeding speed is too fast, the welding wire will accumulate during the welding process, forming a weld nodule, affecting the quality of the weld; if the wire feeding speed is too slow, defects such as weld depression and incomplete penetration will occur, reducing the strength and reliability of the weld joint. Therefore, we designed a laser welding equipment. Summary of the invention

[0005] The present invention provides a laser welding device to solve the technical problem that in actual welding in the related technology, different weldments require welding wires of different sizes, but the existing laser welding equipment is difficult to quickly and accurately switch the welding wires, and the wire feeding speed cannot be automatically matched with the welding wire size, which affects the welding quality and efficiency.

[0006] The present invention provides a laser welding device, comprising a laser device equipped with a handheld laser welding gun, an installation box, which is fixedly installed at the bottom of the laser device, and a wire feeding mechanism is arranged inside the installation box, and a plurality of groups of welding wires of different sizes and whose sizes are sequentially reduced are wound on the wire feeding mechanism; a driving rod, which is slidably installed on the installation box, and a clamping mechanism is fixedly installed on the installation box, and the welding wires of different sizes are conveyed in combination with the clamping mechanism; a speed changing mechanism, which is fixedly installed on the installation box, and the conveying speed is synchronously changed in the process that the driving rod conveys welding wires of different sizes through the clamping mechanism; an auxiliary mechanism, which comprises a pressure wheel for limiting the welding wire, and the pressure wheel synchronously adjusts the speed changing mechanism according to the actual size of the welding wire.

[0007] As a further optimization scheme of the present invention, the wire feeding mechanism includes three winding drums fixedly connected to the installation box, welding wires of different sizes are respectively wound on the three winding drums, and a plurality of slots are opened on the inner wall of the winding drum.

[0008] As a further optimization scheme of the present invention, the clamping mechanism includes a fixed plate fixedly connected to the driving rod, and an installation groove is provided inside the fixed plate and the driving rod; a limiting column is slidably installed on the fixed plate and connected to the limiting ring built into the fixed plate through a second spring; a first screw rod is rotatably installed on the driving rod, and a threaded plate is threadedly connected thereto, and the threaded plate is slidably connected to the driving rod; a pull rope, one end of which is connected to the threaded plate, and the other end is connected to the limiting column.

[0009] As a further optimization scheme of the present invention, the wire feeding mechanism also includes a bent pipe fixedly connected to the mounting box; a pressure rod slidably installed inside the bent pipe and connected to the bent pipe through a third spring; and an adjustment plate rotatably installed on the driving rod.

[0010] As a further optimization scheme of the present invention, the wire feeding mechanism also includes a fixed ring fixedly connected to the handheld laser welding gun; a rotating disk, rotatably mounted inside the fixed ring, on which a plurality of conductive nozzles are fixedly mounted, and the conductive nozzles are passed through by the welding wire; a first rotating shaft, fixedly mounted on the rotating disk, on which a first gear is fixedly mounted; a pushing assembly, fixedly mounted on the fixed ring and meshing with the first gear.

[0011] As a further optimization scheme of the present invention, the pushing assembly includes a first rack meshing with the first gear; a fixed box, fixedly mounted on the fixed ring, and slidably connected to the first rack; a first slide rod, fixedly mounted on the fixed box, and slidably connected to the first slide plate; a first spring, sleeved on the first slide rod, and its two ends are respectively connected to the first slide plate and the fixed box.

[0012] As a further optimization scheme of the present invention, the speed change mechanism includes a motor fixedly connected to the mounting box; a second conical wheel fixedly mounted on the power output shaft of the motor; a second rotating shaft rotatably mounted on the mounting box, on which the first conical wheel is fixedly mounted and is connected to the second conical wheel through a first driving belt; an adjusting frame sleeved on the first driving belt and slidably connected to the mounting box; an adjusting assembly fixedly mounted on the adjusting frame and slidably connected to the mounting box; a second screw fixedly mounted on the mounting box, on which a second pulley matching the driving rod is rotatably mounted; the first pulley is fixedly mounted on the second rotating shaft and connected to the second pulley through a second driving belt.

[0013] As a further optimization scheme of the present invention, the adjustment assembly includes an extension box fixedly connected to the adjustment plate, and the extension box is slidably connected to the installation box; a third screw rod is rotatably mounted on the extension box, and an extension column is threadedly connected thereto, and the extension column is slidably connected to the extension box, and the extension column is fixedly connected to the second rotating shaft; a first electromagnet is fixedly mounted on the adjustment plate, and a second slide rod is fixedly mounted thereon; a second electromagnet is fixedly mounted on the fixing ring, and a second slide rod is fixedly mounted thereon; an iron block is slidably mounted on the second slide rod, and the two iron blocks are connected by a connecting plate, and a locking tooth is fixedly mounted on the connecting plate; a second gear is fixedly mounted on the third screw.

[0014] As a further optimization scheme of the present invention, the auxiliary mechanism is an auxiliary platform fixedly connected to the installation box; the third slide bar is fixedly mounted on the installation box and is slidably connected to the pressure wheel; the fifth spring is sleeved on the third slide bar, and its two ends are respectively connected to the third slide bar and the installation box; a displacement sensor is installed at the pressure wheel for detecting the downward movement distance of the pressure wheel; a transmission plate is fixedly mounted on the adjustment plate and is slidably connected to the installation box.

[0015] As a further optimization scheme of the present invention, the auxiliary platform includes a support column fixedly connected to the installation box; a positioning plate, fixedly mounted on the support column and connected to the sliding frame through a sixth spring; a connecting rod, fixedly mounted on the pressure wheel; a rotating frame, fixedly mounted on the support column, on which a third rotating shaft is rotatably mounted; a rotating plate, rotatably mounted on the third rotating shaft; a third gear, rotatably mounted on the third rotating shaft, a second rack meshing between the two third gears, and the second rack is fixedly connected to the sliding frame.

[0016] The beneficial effects of the present invention are: 1. The laser welding equipment described in the present invention can easily control the connection between the limit column and the winding reel slot by rotating the first screw rod, and can quickly switch welding wires of different sizes; at the same time, when the driving rod moves to switch the welding wire, the adjustment plate drives the pressure rod to squeeze the water source, and pushes the relevant components to rotate the rotating disk to automatically adjust the position of the conductive nozzle; this not only avoids the tedious operation of manually replacing the welding wire reel and adjusting the conductive nozzle, improves work efficiency, but also ensures that welding wires of different sizes can be accurately connected to the laser welding gun.

[0017] 2. The laser welding equipment described in the present invention realizes preliminary speed matching by adjusting the position of the first driving belt by driving the relevant parts to move by the adjustment plate when the driving rod switches the welding wire; moreover, the equipment is also equipped with a displacement sensor, which can monitor the deviation between the actual size of the welding wire and the standard size in real time; once the deviation is detected, the conveying speed of the speed change mechanism is accurately adjusted by controlling the electromagnet; if the welding wire is too thin, the wire feeding speed is increased; if the welding wire is too thick, the wire feeding speed is reduced; this adjustment can effectively change the welding wire feeding speed according to the actual size of the welding wire, avoid defects such as weld depression and weld nodules caused by improper wire feeding speed, and greatly improve the welding quality.

[0018] 3. The laser welding equipment described in the present invention can automatically limit the welding wire by the interaction between the permanent magnet on the transmission plate and the permanent magnet on the pressure wheel during the switching process of the welding wire; when the size of the welding wire deviates, the auxiliary platform will also take corresponding measures. For example, when the welding wire is too thin, the downward movement distance of the pressure wheel exceeds expectations, and the sliding frame is squeezed by the connecting rod to drive the relevant components to reduce the angle of the rotating plate, thereby increasing the lateral contact area and suppressing the jumping of the welding wire; when the welding wire is too thick, the downward movement distance of the pressure wheel is insufficient, and the permanent magnet at the bottom of the connecting rod absorbs the permanent magnet on the sliding frame to increase the angle of the rotating plate and reduce the friction resistance; in this way, the stability of the welding wire during the transportation process can be ensured, the surface of the welding wire can be effectively protected, and the welding quality and reliability can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the connection between the fixed ring and the rotating disk of the present invention; Figure 3 It is a schematic diagram of the internal structure of the installation box of the present invention; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 yes Figure 3 Enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the internal structure of the winding drum of the present invention; Figure 7 It is a schematic diagram of the internal structure of the extension box of the present invention; Figure 8 It is a schematic diagram of the internal structure of the fixed disk of the present invention; Fig. 9 It is a structural schematic diagram of the auxiliary mechanism of the present invention; Fig.10 yes Fig. 9 Enlarged view of point C in the middle; Fig.11 It is a schematic diagram of the internal structure of the elbow of the present invention.

[0020] In the figure: 1, laser; 2, hand-held laser welding gun; 301, installation box; 302, fixing ring; 303, conductive nozzle; 304, first gear; 305, first rotating shaft; 306, first spring; 307, first slide bar; 308, first slide plate; 309, fixing box; 310, first rack; 311, rotating disk; 312, winding disk; 313, driving rod; 314, fixing disk; 315, limiting column; 316, pull rope; 317, second spring; 318, threaded plate; 319, first screw; 320, elbow; 321, third spring; 322, pressure rod; 323, adjusting plate; 401, first driving belt; 402, first cone wheel; 403, second rotating shaft; 404, adjusting frame; 405, extension column; 406 , motor; 407, second cone wheel; 408, second drive belt; 409, first pulley; 410, second pulley; 411, first electromagnet; 412, second screw; 413, extension box; 414, second electromagnet; 415, second slide bar; 416, connecting plate; 417, fourth spring; 418, latching tooth; 419, second gear; 420, iron block; 421, third screw; 501, third slide bar; 502, fifth spring; 503, pressure wheel; 504, connecting rod; 505, rotating plate; 506, sliding frame; 507, sixth spring; 508, positioning plate; 509, second rack; 510, third gear; 511, third rotating shaft; 512, rotating frame; 513, support column; 514, transmission plate. DETAILED DESCRIPTION

[0021] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0022] like Figures 1 to 11As shown, a laser welding device according to an embodiment of the present invention comprises a laser 1 equipped with a handheld laser welding gun 2; an installation box 301 is fixedly installed at the bottom of the laser 1, and a wire feeding mechanism is arranged inside the installation box 301, on which a plurality of groups of welding wires of different sizes and whose sizes decrease in sequence are wound; a driving rod 313 is slidably installed on the installation box 301, on which a clamping mechanism is fixedly installed, and the welding wires of different sizes are conveyed in combination with the clamping mechanism; a speed changing mechanism is fixedly installed on the installation box 301, and in the process that the driving rod 313 conveys welding wires of different sizes through the clamping mechanism, the conveying speed is changed synchronously; the auxiliary mechanism comprises a pressure wheel 503 for limiting the welding wire, and the pressure wheel 503 synchronously adjusts the speed changing mechanism according to the actual size of the welding wire.

[0023] It should be noted that in real life, welding of different materials requires the use of welding wires of different sizes. Thicker materials usually require welding wires of larger diameters to ensure sufficient deposited metal and welding strength; while thin plate welding should use thin welding wires to avoid burn-through. In order to select welding wires of corresponding sizes for work, the driving rod 313 is generally used to control the clamping mechanism through the driving rod 313, so that the clamping mechanism can cancel the limit on the wire feeding mechanism and can move freely inside the wire feeding mechanism, thereby selecting the welding wire of the appropriate size and driving it with the speed change mechanism to transport the welding wire of the specified size. In this process, the driving rod 313 will also synchronously change the speed change mechanism to match the conveying speed of the speed change mechanism with the size of the welding wire to avoid excessive or slow conveying affecting welding.

[0024] When the wire feeding mechanism is conveying the welding wire, in order to ensure that the welding wire can be conveyed stably, it is generally necessary to use an auxiliary mechanism to limit the welding wire so that the welding wire can be conveyed along the specified route, and to detect the actual size of the welding wire and feed it back to the speed change mechanism to control the corresponding detailed regulation of the speed change mechanism.

[0025] like Figure 3 and Figure 6 As shown, the wire feeding mechanism includes three winding drums 312 fixedly connected to the installation box 301 , and welding wires of different sizes are respectively wound on the three winding drums 312 , and a plurality of slots are opened on the inner wall of the winding drum 312 .

[0026] It should be noted that the clamping mechanism fixedly installed on the driving rod 313 is located inside the winding drum 312 and plugged into the slot, so that the corresponding winding drum 312 can be effectively selected with the help of the clamping mechanism, which facilitates the transportation of welding wires of different sizes.

[0027] like Figure 1 and Figure 8As shown, the clamping mechanism includes a fixed plate 314 fixedly connected to the driving rod 313, and mounting grooves are provided inside the fixed plate 314 and the driving rod 313; a limiting column 315 is slidably installed on the fixed plate 314, and is connected to the limiting ring built into the fixed plate 314 through a second spring 317; a first screw rod 319 is rotatably installed on the driving rod 313, and a threaded plate 318 is threadedly connected thereto, and the threaded plate 318 is slidably connected to the driving rod 313; one end of the pull rope 316 is connected to the threaded plate 318, and the other end is connected to the limiting column 315.

[0028] It should be noted that when the thickness of the material to be welded is different, the size of the welding wire to be used will also be different. At this time, the first screw 319 can be rotated first, so that the first screw 319 drives the threaded plate 318 to move, so that the threaded plate 318 will pull the limit column 315 through the pull rope 316, so that the limit column 315 is away from the slot, thereby canceling the limit on the winding reel 312. In this way, when the driving rod 313 is pulled and moved, it can effectively drive the limit column 315 to move to the inside of the remaining winding reels 312, and by reversing the first screw 319, the limit column 315 is plugged into the slot inside the remaining driving rods 313. In this way, when the speed change mechanism drives the driving rod 313 to rotate, it can drive different driving rods 313 to rotate and transport welding wires of different sizes, so that the size of the welding wire corresponds to the corresponding material.

[0029] like Figure 1 and Fig.11 As shown, the wire feeding mechanism also includes a curved pipe 320 fixedly connected to the mounting box 301 ; a pressure rod 322 is slidably mounted inside the curved pipe 320 and connected to the curved pipe 320 via a third spring 321 ; and an adjustment plate 323 is rotatably mounted on the driving rod 313 .

[0030] It should be noted that when the limit column 315 needs to be moved to a different winding reel 312, the adjustment plate 323 will move with the movement of the driving rod 313, and the movement of the adjustment plate 323 will drive the pressure rod 322 to move, which can effectively squeeze the water source in the bent pipe 320. The squeezed water source will be transported to the handheld laser welding gun 2, and used to drive the wire feeding mechanism located at the handheld laser welding gun 2, so that it can rotate synchronously with the welding wire.

[0031] like Figure 2 As shown, the wire feeding mechanism also includes a fixed ring 302 fixedly connected to the handheld laser welding gun 2; a rotating disk 311 is rotatably mounted inside the fixed ring 302, and a plurality of conductive nozzles 303 are fixedly mounted thereon, and the conductive nozzles 303 are passed through by the welding wire; a first rotating shaft 305 is fixedly mounted on the rotating disk 311, and a first gear 304 is fixedly mounted thereon; and a pushing assembly is fixedly mounted on the fixed ring 302 and meshes with the first gear 304.

[0032] The pushing assembly includes a first rack 310 meshing with the first gear 304; a fixed box 309 fixedly mounted on the fixed ring 302, on which the first rack 310 is slidably connected; a first slide bar 307 fixedly mounted on the fixed box 309, and slidably connected to the first slide plate 308; a first spring 306 is sleeved on the first slide bar 307, and its two ends are respectively connected to the first slide plate 308 and the fixed box 309.

[0033] It should be noted that the elbow 320 can be connected to the telescopic tube on the fixed box 309 through an external connecting pipe, so that the water source in the elbow 320 squeezed by the pressure rod 322 will be transported to the inside of the telescopic tube of the fixed box 309 through the external connecting pipe, so that the telescopic tube on the fixed box 309 is unfolded, thereby pushing and squeezing the first slide plate 308, so that the first slide plate 308 drives the first rack 310 to move, so that the first rack 310 can rotate the first gear 304, and the first gear 304 rotates the first rotating shaft 305. The first rotating shaft 305 rotates the rotating disk 311, thereby changing the position of the conductive nozzle 303. The corresponding sizes of welding wires are passed through the inside of the plurality of conductive nozzles 303 respectively. When the driving rod 313 moves to switch the use of welding wires of different sizes, the corresponding conductive nozzle 303 will also change the position of the corresponding conductive nozzle 303 due to the transmission of the above structure, so that the welding wire in the corresponding conductive nozzle 303 is located at the bottom of the handheld laser welding gun 2, so that the welding wire can be effectively used for welding.

[0034] like Figure 3 and Figure 4 As shown, the speed change mechanism includes a motor 406 fixedly connected to the mounting box 301; the second cone wheel 407 is fixedly mounted on the power output shaft of the motor 406; the second rotating shaft 403 is rotatably mounted on the mounting box 301, on which the first cone wheel 402 is fixedly mounted, and is connected to the second cone wheel 407 through the first driving belt 401; the adjusting frame 404 is sleeved on the first driving belt 401 and is slidably connected to the mounting box 301; the adjusting assembly is fixedly mounted on the adjusting frame 404 and is slidably connected to the mounting box 301; the second screw 412 is fixedly mounted on the mounting box 301, on which a second pulley 410 matching the driving rod 313 is rotatably mounted; the first pulley 409 is fixedly mounted on the second rotating shaft 403, and is connected to the second pulley 410 through the second driving belt 408.

[0035] It should be noted that, after the driving rod 313 switches the corresponding welding wire, the motor 406 can be started, and the motor 406 will drive the second cone wheel 407 to rotate, and the second cone wheel 407 rotates the first cone wheel 402 through the first driving belt 401, and the first cone wheel 402 drives the second rotating shaft 403 to rotate, and the second rotating shaft 403 rotates the second pulley 410 through the first pulley 409 and the second driving belt 408, so that the second pulley 410 can rotate the driving rod 313, and the winding drum 312 is connected to the driving rod 313 through the clamping mechanism, and the rotation of the driving rod 313 will drive the winding drum 312 to rotate, so that the winding drum 312 releases the corresponding welding wire for use, and the released welding wire will be continuously transported to the conductive nozzle 303 for use by the handheld laser welding gun 2, thereby completing the welding.

[0036] like Figure 7 As shown, the adjustment component includes an extension box 413 fixedly connected to the adjustment plate 323, and the extension box 413 is slidably connected to the installation box 301; the third screw 421 is rotatably installed on the extension box 413, and an extension column 405 is threadedly connected thereto, the extension column 405 is slidably connected to the extension box 413, and the extension column 405 is fixedly connected to the second rotating shaft 403; the first electromagnet 411 is fixedly installed on the adjustment plate 323, and a second slide bar 415 is fixedly installed thereon; the second electromagnet 414 is fixedly installed on the fixing ring 302, and a second slide bar 415 is fixedly installed thereon; the iron block 420 is slidably installed on the second slide bar 415, and the two iron blocks 420 are connected by a connecting plate 416, and a latch tooth 418 is fixedly installed on the connecting plate 416; the second gear 419 is fixedly installed on the third screw 421.

[0037] It should be noted that when the driving rod 313 is pulled to switch the corresponding winding reel 312 for the clamping mechanism, the adjusting plate 323 will also move together, and the movement of the adjusting plate 323 will also drive the extension box 413 and the extension column 405 to move together, which can effectively make the first driving belt 401 move together, so as to effectively adjust the corresponding driving speed, and this speed matches the size of the welding wire, which can better convey the welding wire and avoid the welding wire being conveyed too fast or too slow to affect the welding.

[0038] like Fig. 9 As shown, the auxiliary mechanism is an auxiliary platform fixedly connected to the installation box 301; the third slide bar 501 is fixedly installed on the installation box 301 and is slidably connected to the pressure wheel 503; the fifth spring 502 is sleeved on the third slide bar 501, and its two ends are respectively connected to the third slide bar 501 and the installation box 301; a displacement sensor is installed at the pressure wheel 503 to detect the downward movement distance of the pressure wheel 503; the transmission plate 514 is fixedly installed on the adjustment plate 323 and is slidably connected to the installation box 301.

[0039] It should be noted that when the driving rod 313 is pulled to switch the corresponding winding disk 312 through the clamping mechanism, the adjusting plate 323 will also move together, and the movement of the adjusting plate 323 will also drive the transmission plate 514 to move together. A first permanent magnet is fixedly installed on the transmission plate 514, and a second permanent magnet is fixedly installed on the pressure wheel 503. The first permanent magnet and the second permanent magnet repel each other by magnetic force. In this way, when the clamping mechanism on the driving rod 313 moves to the inside of the corresponding winding disk 312, the first permanent magnet on the transmission plate 514 will also move to the top of the corresponding pressure wheel 503, interact with the second permanent magnet, and make the pressure wheel 503 overcome the fifth spring 502 and move downward, thereby limiting the welding wire and assisting the movement of the welding wire.

[0040] However, the downward movement path of the pressure wheel 503 is monitored by the displacement sensor. Since the actual size of the welding wire used is not necessarily the originally marked size, there may be errors. In this way, the downward movement distance of the pressure wheel 503 will be different from the monitoring distance originally set by the displacement sensor. When the downward movement distance of the pressure wheel 503 is greater than the set distance, the actual size of the welding wire is smaller than the standard size. In this way, the amount of melting of the handheld laser welding gun 2 each time will be reduced, and the wire feeding speed needs to be increased to maintain the molten pool filling amount and avoid weld dents. In this way, the displacement sensor will transmit a signal to the controller, and the controller will control the second electromagnet 4 14 is energized, and the magnitude of the energized current matches the difference between the actual downward moving distance and the standard downward moving distance. The second electromagnet 414 is energized to generate suction on the iron block 420, thereby overcoming the fourth spring 417 and making the iron block 420 close to the second electromagnet 414, so that the latching tooth 418 can drive the second gear 419 to rotate, and the second gear 419 reverses to make the third screw 421 reverse, and the third screw 421 reverses to make the extension column 405 return to the extension box 413, thereby driving the adjustment frame 404 close to the extension box 413, which can effectively speed up the conveying speed and make up for the corresponding size gap.

[0041] On the contrary, if the welding wire is too thick, the amount of melting per unit time is large, and the wire feeding speed needs to be reduced to avoid molten pool accumulation or weld nodules. In this case, the first electromagnet 411 will be started, and a current corresponding to the distance difference will be input to act on the iron block 420, so that the iron block 420 controls the adjustment frame 404 to move away from the extension box 413, thereby achieving a deceleration effect and matching it with the corresponding welding wire size.

[0042] Moreover, there are multiple groups of slots arranged inside each winding drum 312, and the clamping mechanism can only limit one group. The position of the clamping mechanism limit is different, and the corresponding conveying speed will also be different. Although the conveying speed corresponding to the traditional welding wire is basically fixed, when welding some different materials, it may be necessary to speed up or slow down the original speed. In this way, the clamping mechanism is limited in the middle of the winding drum 312 at a normal speed, while the left and right sides are accelerated and decelerated respectively. In this way, not only different welding wires can be switched for use, but also the speed can be finely adjusted for a certain welding wire for further matching. The adjustment of the speed change mechanism by the displacement sensor can be further adjusted according to the actual size of the welding wire, effectively avoiding the phenomenon of mismatch between the welding wire size and the conveying speed.

[0043] like Figures 9 and 10 As shown, the auxiliary platform includes a support column 513 fixedly connected to the installation box 301; the positioning plate 508 is fixedly installed on the support column 513 and is connected to the sliding frame 506 through the sixth spring 507; the connecting rod 504 is fixedly installed on the pressure wheel 503; the rotating frame 512 is fixedly installed on the support column 513, and a third rotating shaft 511 is rotatably installed on it; the rotating plate 505 is rotatably installed on the third rotating shaft 511; the third gear 510 is rotatably installed on the third rotating shaft 511, and a second rack 509 is meshed between the two third gears 510, and the second rack 509 is fixedly connected to the sliding frame 506.

[0044] It should be noted that if the size of the welding wire is smaller than the actual size, the distance that the pressure wheel 503 moves downward exceeds the original size, so that the connecting rod 504 will squeeze the sliding frame 506 through the connecting rod 504, which will cause the sliding frame 506 to move downward. The downward movement of the sliding frame 506 will drive the second rack 509 to move downward, and the downward movement of the second rack 509 drives the third gear 510 to rotate the two rotating plates 505, and adjust the angle between the two rotating plates 505 to make the angle smaller, thereby suppressing the jumping during high-speed transportation by increasing the lateral contact area. For welding wire that is too thick, the distance that the pressure wheel 503 moves downward is smaller than the original size, but the third permanent magnet is fixedly installed at the bottom of the connecting rod 504, and the third permanent magnet will absorb the fourth permanent magnet embedded in the sliding frame 506, so that the sliding frame 506 moves upward, so that the angle of the two rotating plates 505 becomes larger, reducing friction resistance, preventing scratches on the surface of the welding wire, and making the rotating plate 505 that assists in welding wire transportation match the actual size of the welding wire.

[0045] Working principle: When the size of the welding wire needs to be changed, the first screw 319 is rotated to drive the threaded plate 318 to move, and the limit column 315 is pulled by the pull rope 316 to keep it away from the slot of the winding reel 312. The driving rod 313 moves and drives the limit column 315 to other winding reels 312, and the first screw 319 is reversed to make the limit column 315 plug into the slot of the new winding reel 312, and select the welding wire of the appropriate size.

[0046] The motor 406 is started, and its power output shaft drives the second cone wheel 407 to rotate, which in turn drives the first cone wheel 402 to rotate through the first driving belt 401, thereby driving the second rotating shaft 403 to rotate; the second rotating shaft 403 drives the second pulley 410 to rotate through the first pulley 409 and the second driving belt 408, and the driving rod 313 rotates accordingly, driving the winding drum 312 to rotate and release the welding wire.

[0047] When the driving rod 313 moves to switch the welding wire, the adjusting plate 323 moves accordingly, driving the pressing rod 322 to squeeze the water source in the bent pipe 320. The water source enters the telescopic tube of the fixed box 309 through the connecting pipe, pushing the first slide plate 308 to move the first rack 310, and the first gear 304 meshing with the first rack 310 rotates, driving the first rotating shaft 305 and the rotating disk 311 to rotate, changing the position of the conductive nozzle 303, so that the welding wire of the corresponding size is located at the bottom of the handheld laser welding gun 2 for welding.

[0048] When the driving rod 313 switches the welding wire, the adjusting plate 323 drives the extension box 413 and the extension column 405 to move, adjusts the position of the first driving belt 401, and adjusts the driving speed to match the welding wire size; if there is an error between the actual size of the welding wire and the standard size, the displacement sensor detects the downward movement distance of the pressure wheel 503 and transmits a signal to the controller; when the welding wire is too thin, the controller controls the second electromagnet 414 to be energized, attracts the iron block 420, drives the latch tooth 418 to drive the second gear 419 to rotate, and reverses the third screw 421, and the extension column 405 returns to the extension box 413, and the adjusting frame 404 approaches the extension box 413 to speed up the wire feeding speed; when the welding wire is too thick, the first electromagnet 411 is started, so that the iron block 420 controls the adjusting frame 404 to move away from the extension box 413, thereby reducing the wire feeding speed.

[0049] When the driving rod 313 switches the winding reel 312, the adjusting plate 323 drives the transmission plate 514 to move, and the first permanent magnet on the transmission plate 514 interacts with the second permanent magnet on the pressure wheel 503, so that the pressure wheel 503 overcomes the fifth spring 502 and moves down to limit the welding wire; if the welding wire size is smaller than the standard size, the downward movement distance of the pressure wheel 503 exceeds the original size, and the connecting rod 504 squeezes the sliding frame 506 to move downward, driving the second rack 509 to move downward, driving the third gear 510, and rotating plate 505 to rotate, reducing the angle, increasing the lateral contact area to suppress the welding wire from jumping; if the welding wire is too thick, the downward movement distance of the pressure wheel 503 is smaller than the original size, and the third permanent magnet at the bottom of the connecting rod 504 absorbs the fourth permanent magnet on the sliding frame 506, so that the sliding frame 506 moves up, and the angle of the rotating plate 505 becomes larger, reducing friction resistance and preventing scratches on the surface of the welding wire.

[0050] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A laser welding device, comprising a laser (1) equipped with a handheld laser welding gun (2), characterized in that: An installation box (301) is fixedly mounted on the bottom of the laser (1), and a wire feeding mechanism is arranged inside the installation box. A plurality of groups of welding wires of different sizes and decreasing in size are wound around the wire feeding mechanism; A driving rod (313) is slidably mounted on the mounting box (301), a clamping mechanism is fixedly mounted on the driving rod (313), and the clamping mechanism is used to change the conveyance of welding wires of different sizes; A speed change mechanism is fixedly mounted on the installation box (301) and synchronously changes the conveying speed when the driving rod (313) conveys welding wires of different sizes through the clamping mechanism; The auxiliary mechanism comprises a pressure wheel (503) for limiting the position of the welding wire, and the pressure wheel (503) synchronously adjusts the speed change mechanism according to the actual size of the welding wire.

2. A laser welding device according to claim 1, characterized in that: The wire feeding mechanism comprises three winding reels (312) fixedly connected to the installation box (301), welding wires of different sizes being wound around the three winding reels (312), and a plurality of slots are provided on the inner wall of the winding reels (312).

3. A laser welding device according to claim 2, characterized in that: The clamping mechanism comprises a fixing plate (314) fixedly connected to the driving rod (313), and mounting grooves are provided inside the fixing plate (314) and the driving rod (313); A limiting column (315) is slidably mounted on the fixed disk (314) and is connected to a limiting ring built into the fixed disk (314) via a second spring (317); A first screw rod (319) is rotatably mounted on the driving rod (313), and a threaded plate (318) is threadedly connected thereto, and the threaded plate (318) is slidably connected to the driving rod (313); A pull rope (316) has one end connected to the threaded plate (318) and the other end connected to the limiting column (315).

4. A laser welding device according to claim 3, characterized in that: The wire feeding mechanism further comprises a bent pipe (320) fixedly connected to the installation box (301); A pressure rod (322) is slidably mounted inside the curved pipe (320) and connected to the curved pipe (320) via a third spring (321); The adjustment plate (323) is rotatably mounted on the driving rod (313).

5. A laser welding device according to claim 4, characterized in that: The wire feeding mechanism also includes a fixing ring (302) fixedly connected to the handheld laser welding gun (2); A rotating disk (311) is rotatably mounted inside the fixing ring (302), and a plurality of conductive nozzles (303) are fixedly mounted on the rotating disk, and the conductive nozzles (303) are passed through by welding wires; A first rotating shaft (305) is fixedly mounted on the rotating disk (311), and a first gear (304) is fixedly mounted on the first rotating shaft; The pushing assembly is fixedly mounted on the fixing ring (302) and meshes with the first gear (304).

6. A laser welding device according to claim 5, characterized in that: The pushing assembly comprises a first rack (310) meshing with the first gear (304); A fixed box (309) fixedly mounted on the fixed ring (302) and having a first rack (310) slidably connected thereto; A first sliding rod (307) is fixedly mounted on the fixing box (309) and is slidably connected to the first sliding plate (308); The first spring (306) is sleeved on the first slide bar (307), and its two ends are respectively connected to the first slide plate (308) and the fixing box (309).

7. The laser welding equipment according to claim 5, characterized in that: The speed change mechanism comprises a motor (406) fixedly connected to the mounting box (301); A second cone wheel (407) is fixedly mounted on the power output shaft of the motor (406); A second rotating shaft (403) is rotatably mounted on the mounting box (301), a first cone wheel (402) is fixedly mounted on the second rotating shaft (403), and the second cone wheel (407) is connected to the second cone wheel (407) via a first driving belt (401); An adjustment frame (404) is sleeved on the first driving belt (401) and is slidably connected to the installation box (301); An adjustment component, fixedly mounted on the adjustment frame (404) and slidably connected to the installation box (301); A second screw rod (412) is fixedly mounted on the mounting box (301), and a second pulley (410) matching the driving rod (313) is rotatably mounted on the second screw rod; The first pulley (409) is fixedly mounted on the second rotating shaft (403) and is connected to the second pulley (410) via a second driving belt (408).

8. The laser welding equipment according to claim 5, characterized in that: The adjustment assembly comprises an extension box (413) fixedly connected to the adjustment plate (323), and the extension box (413) is slidably connected to the installation box (301); A third screw rod (421) is rotatably mounted on the extension box (413), and an extension column (405) is threadedly connected thereto. The extension column (405) is slidably connected to the extension box (413), and the extension column (405) is fixedly connected to the second rotating shaft (403); A first electromagnet (411) is fixedly mounted on the adjustment plate (323), and a second sliding rod (415) is fixedly mounted on the first electromagnet; A second electromagnet (414) is fixedly mounted on the fixing ring (302), and a second sliding rod (415) is fixedly mounted on the fixing ring; An iron block (420) is slidably mounted on the second slide bar (415); the two iron blocks (420) are connected via a connecting plate (416); and a latching tooth (418) is fixedly mounted on the connecting plate (416); The second gear (419) is fixedly mounted on the third screw rod (421).

9. The laser welding equipment according to claim 4, characterized in that: An auxiliary platform on which the auxiliary mechanism is fixedly connected to the installation box (301); A third sliding rod (501) is fixedly mounted on the mounting box (301) and is slidably connected to the pressing wheel (503); A fifth spring (502) is sleeved on the third slide bar (501), and two ends of the fifth spring are respectively connected to the third slide bar (501) and the installation box (301); A displacement sensor is installed at the pressing wheel (503) for detecting the downward movement distance of the pressing wheel (503); The transmission plate (514) is fixedly mounted on the adjustment plate (323) and is slidably connected to the installation box (301).

10. The laser welding equipment according to claim 9, characterized in that: The auxiliary platform comprises a support column (513) fixedly connected to the installation box (301); A positioning plate (508) is fixedly mounted on the support column (513) and connected to the sliding frame (506) via a sixth spring (507); A connecting rod (504) fixedly mounted on the pressing wheel (503); A rotating frame (512) is fixedly mounted on the support column (513), and a third rotating shaft (511) is rotatably mounted on the rotating frame; A rotating plate (505) rotatably mounted on the third rotating shaft (511); The third gear (510) is rotatably mounted on the third rotating shaft (511), a second rack (509) is meshed between the two third gears (510), and the second rack (509) is fixedly connected to the sliding frame (506).

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