A laser welding head with a function of rotating wire feeding

Abstract

The present invention discloses a laser welding head with a rotating wire feeding function, belonging to the technical field of laser welding heads. A laser welding head with a rotating wire feeding function includes a laser emitting end. On one side outside the laser emitting end, there is a storage barrel. In the middle of the storage barrel, there is a connecting frame. Four storage columns are evenly distributed around the outside of the connecting frame and the inner wall of the storage barrel. The present invention solves the problem that in the existing laser welding head, during the welding process, the welding wire is transmitted through the wire feeding part, and the gas supply pipe is located on the other side of the wire feeding part. The protective gas transmitted by the gas supply pipe cannot completely cover and wrap the welding wire, resulting in a reduction in the welding effect. After the first motor drives the surrounding storage columns to rotate, one of the electronic gas valves is opened to release the corresponding protective gas, so that the gas is matched with the welding wire for different welding materials, and the protective gas is discharged from the extension block position together with the welding wire.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding heads, and particularly to a laser welding head with a rotating wire feeding function. Background Art

[0002] A laser welding head is a key component of a laser welding device. It utilizes the radiation energy of the laser head to achieve an effective welding process. Its main function is to focus the high-energy density beam generated by the laser onto the area to be welded of the workpiece to achieve the melting and connection of materials. The laser welding head has precise controllability and rich adjustment capabilities, and is widely used in the precision welding of various metal and non-metal materials, especially suitable for application scenarios with high requirements for welding quality and appearance.

[0003] Chinese Patent No. CN221791424U discloses a laser welding head and a laser welding device with a wire feeding function, including a first wire feeding part. The first wire feeding part is connected to the welding nozzle, and the first wire feeding part is provided with a wire feeding channel. The wire feeding channel has a wire outlet, and the wire outlet is located on one side of the laser beam and is used to convey the welding wire to the welding point during welding. This laser welding head with a wire feeding function adds a first wire feeding part to the welding nozzle, and the first wire feeding part is provided with a wire feeding channel. During the welding of the workpiece, the welding wire can be conveyed to the welding point through the wire feeding channel of the first wire feeding part to supplement the welding wire during the welding of the workpiece and ensure the welding quality.

[0004] In the above patent, during the welding process, the welding wire is transmitted through the wire feeding part, and the gas supply pipe is located on the other side of the wire feeding part. The shielding gas transmitted by the gas supply pipe cannot completely cover and wrap the welding wire, resulting in the welding wire being prone to contacting the external gas during the welding process and thus not being able to protect the weld pool well. On the other hand, the welding wire inside the wire feeding part cannot be adjusted according to the welding material, resulting in a reduction in the welding effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a laser welding head with a rotating wire feeding function. After the surrounding storage column is rotated by a first motor, one of the electronic gas valves is opened to release the corresponding shielding gas, so that the gas is matched with the welding wire for different welding materials, and the shielding gas is discharged from the extension block position together with the welding wire, solving the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A laser welding head with a rotating wire feeding function, including a laser emitting end, on one side of the outside of the laser emitting end, there is a storage barrel, in the middle of the inside of the storage barrel, there is a connecting frame, between the outside of the connecting frame and the inner wall of the storage barrel, four storage columns are evenly distributed in a circular manner, on one side of the middle of the lower end of the storage barrel, there is a blower, horizontally arranged at the rear end of the storage barrel are three gas storage tanks, at the lower ends of the three gas storage tanks, there are electronically controlled gas valves sealed, between the lower ends of the three electronically controlled gas valves and the air inlet of the blower, they are hermetically connected through a four-way pipe, the air outlet of the blower is hermetically connected to the middle position of the lower end of the storage barrel, after the connecting frame outputs, it can drive the storage columns and adjust the positions of the storage columns, adjust the types of welding wires at the upper end of the transmission cavity, adjust the opening of the corresponding electronically controlled gas valves, and adjust the shielding gas discharged from the gas storage tanks, so that the gas and the welding wire can meet different welding requirements.

[0007] Preferably, the center position of the storage column is rotatably connected to the connecting frame, on the outer wall of the connecting frame facing the four storage columns, there are respectively second motors, and the output shafts of the second motors pass through the connecting frame and are welded and fixed to the center position of the storage column. After rotating and adjusting the storage columns, the second motors can independently output power after being powered on and make the storage columns rotate.

[0008] Preferably, at one end of the connecting frame facing the storage column, there is an extension rod, at one end of the extension rod, there is a limiting frame, on both sides inside the limiting frame, there are third pressing blocks that always clamp the welding wire. When the welding wire is wound around the outside of the storage column, one end of the welding wire extends and is clamped inside the limiting frame.

[0009] Preferably, at the middle position of the upper end of the storage barrel, there is a first motor, and the output shaft of the first motor passes through the storage barrel and is welded and fixed to the upper end of the connecting frame. Through the output of the first motor and driving the storage columns to rotate through the connecting frame.

[0010] Preferably, on one side of the inside of the storage barrel facing the laser emitting end, there is a transmission cavity, at the lower end of the transmission cavity, there is a diversion frame welded to the storage barrel, at the lower end of the diversion frame, there is an extension block extending towards the lower end of the laser emitting end, and an anti-solder clogging head assembly is installed inside the extension block. Through the extended diversion frame and the extension block, it is convenient for the transmission of the welding wire, so that the welding wire is transmitted to directly below the laser emitting end.

[0011] Preferably, first extrusion blocks are rotatably arranged at both the upper and lower ends and on both sides of the middle position inside the diversion frame. A second extrusion block rotatably connected to the extension block is arranged at the position of the first extrusion block inside the diversion frame towards the extension block. First diversion bars welded and fixed to the diversion frame are arranged on both sides between adjacent pairs of the first extrusion blocks. After a pair of first extrusion blocks clamp the wire material, the transmission of the wire is restricted by the first diversion bars at the same time, reducing the collision and the noise generated during the transmission of the wire.

[0012] Preferably, an infrared rangefinder is arranged on one side of the upper end of the transmission cavity, and the infrared rangefinder is aligned with one of the storage columns close to the transmission cavity. The distance between the infrared rangefinder itself and the wound wire can be detected by the infrared rangefinder.

[0013] Preferably, a laser power density sensor is installed in front of the laser emission end and directly aligned with the laser beam to monitor the actual output value of the laser power;

[0014] An infrared temperature sensor is installed on the side or above the laser emission end to ensure that its viewing angle is not interfered by the laser beam and can clearly receive the temperature information of the welding area at the same time;

[0015] A photoelectric sensor is installed in the wire feeding area before the wire enters the transmission cavity, and the sensor is placed parallel to the wire to detect the movement speed of the wire;

[0016] A flow sensor is installed in the gas flow pipeline to ensure that the flow rate of the shielding gas entering the welding area can be monitored in real time;

[0017] A 3D vision sensor is installed between the welding head and the welding surface to scan the shape and depth of the welding surface;

[0018] A controller and an alarm are arranged on the frame on the outer wall of the laser welding head housing;

[0019] The controller controls the operation of the alarm based on the laser power density sensor, the infrared temperature sensor, the photoelectric sensor, the flow sensor, and the 3D vision sensor, including the following steps:

[0020] Step 1: The controller calculates the control coefficient of the laser welding head during the welding process based on the detection values of the laser power density sensor, the infrared temperature sensor, the photoelectric sensor, the flow sensor, the 3D vision sensor and formula (1):

[0021]

[0022] Among them, is the control coefficient during the welding process, represents the laser power output value detected by the laser power density sensor; represents the temperature of the welding area detected by the temperature sensor; represents the wire feeding speed detected by the photoelectric sensor; represents the shielding gas flow rate detected by the flow sensor; represents the actual size of the welding surface scanned by the 3D vision sensor; represents the preset size of the welding surface, represents the actual gas flow velocity; represents the reference gas flow velocity;

[0023] Step 2: The controller calculates the accuracy index of the laser welding head based on Step 1 and Formula (2):

[0024]

[0025] where, is the accuracy index of the laser welding head, represents the preset reference temperature; represents the preset wire feeding speed;

[0026] Step 3: The controller compares the accuracy index of the laser welding head with the preset accuracy index. When the accuracy index of the laser welding head is less than the preset accuracy index, the controller controls the alarm to give an alarm prompt.

[0027] Preferably, the anti-soldering dredging head assembly includes: a sealed housing fixedly embedded in the extension block at its end. A diversion channel is provided at the tail of the sealed housing and communicates with the internal channel of the extension block. A receiving groove is formed in the sealed housing. An inner push sealing tube is movably arranged in the receiving groove, and a first return spring is sleeved on the outer wall of the inner push sealing tube. The inner push sealing tube is connected to the inner wall of the sealed housing through the first return spring. One end of the communication pipe one is fixedly connected to the inner wall of the sealed housing, and the tail of the communication pipe one is connected to the diversion channel through a sealing ring. The other end of the communication pipe one extends movably into the inner push sealing tube. A limiting ring is fixedly sleeved at the end of the communication pipe one extending into the inner push sealing tube. Guide grooves are symmetrically arranged on the inner wall of the inner push sealing tube, and the limiting ring is slidably connected to the guide grooves. The ends of both the sealed housing and the inner push sealing tube are of tapered head structures. An opening and closing baffle one is rotatably arranged on the inner wall of the inner push sealing tube, and a torsion spring is arranged on the rotating shaft of the opening and closing baffle one. An avoidance groove is formed in the tapered head of the inner push sealing tube. A limiting connecting rod is fixedly connected to the side wall of the avoidance groove. A second return spring is installed in the avoidance groove. The communication pipe two is movably arranged in the tapered head of the inner push sealing tube, and a guiding member is fixedly arranged on the outer wall of the communication pipe two. One end of the limiting connecting rod away from the inner wall of the inner push sealing tube is movably arranged in the guiding member. One end of the second return spring close to the guiding member is fixedly connected to the guiding member. The discharge pipe is fixedly embedded in the tapered head structure of the sealed housing, and an opening and closing baffle two is rotatably arranged at the outlet of the discharge pipe, and a torsion spring is arranged on the rotating shaft of the opening and closing baffle two. A clamping groove is formed on the inner wall of the tapered head of the sealed housing.

[0028] The present invention provides another technical solution: a laser welding head with a rotating wire feeding function further includes a display screen located on one side outside the storage barrel. The display screen has a built-in welding system, and the welding system includes:

[0029] An input module: used for the user to input what the two materials to be welded are respectively. This information will be used as the basis for subsequent identification and matching, and a preliminary format check is performed on the input information.

[0030] An entry module: used for pre-entering the materials to be welded by the laser welding head subsequently, and independently entering a corresponding welding wire and shielding gas for each entered material. The entered information is preliminarily sorted and stored to form a database, and different materials to be welded are marked in advance.

[0031] An identification module: used for searching and matching in the database pre-established by the entry module according to the information of the materials to be welded provided by the input module, and identifying the corresponding welding wire and shielding gas for each material.

[0032] An adjustment module: used for sending a start signal to start the first motor, the corresponding electronic gas valve, and the blower for the corresponding welding wire and shielding gas determined by the identification module, and adjusting the corresponding welding wire and shielding gas to the position to be used.

[0033] Wire depth detection module: It is used to detect the winding depth of the welding wire at a fixed position through an infrared rangefinder, so as to determine the diameter of the circle formed by the welding wire, convert the detected winding depth data into digital signals that the system can recognize and process, accurately obtain the welding wire winding depth information, and provide an accurate basis for adjusting the rotation speed of the second motor subsequently;

[0034] Speed calculation module: It is used to calculate the ideal rotation speeds of the motor at different stages when releasing and recovering the welding wire according to the winding depth information transmitted by the wire depth detection module, using a preset algorithm. When releasing the welding wire, calculate the value that makes the rotation speed gradually increase according to the diameter change situation. When recovering the welding wire, calculate the value that makes the rotation speed gradually decrease, so as to achieve the accurate calculation of the motor rotation speed;

[0035] Motor control module: It is used to receive the rotation speed instruction of the second motor calculated by the speed calculation module, and convert it into an actual control signal for the second motor, control the rotation of the output shaft of the second motor, and has basic control functions such as motor start, stop, forward and reverse rotation, and can accurately adjust the output rotation speed of the second motor according to different speed instructions.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] 1. When the present invention transmits the shielding gas for welding, the welding materials corresponding to different materials will be pre-stored inside the gas storage tank. The three gas storage tanks can be filled with nitrogen, argon, and helium respectively. The three shielding gases can correspond to different welding requirements. After the electronic gas valve at the lower end of the gas storage tank is opened, the required shielding gas can be independently released. The gas will be extracted by the fan and enter the diversion frame together with the welding wire from the transmission cavity. Finally, the shielding gas and the welding wire can be discharged together to the lower end of the laser emission end after being transmitted through the diversion frame and the extension block. During the transmission process inside the diversion frame, the shielding gas can fully wrap and cover the welding wire used for welding, avoiding the external gas contacting the welding wire and reducing the welding stability, and improving the welding effect.

[0038] 2. Four wire storage columns for winding welding wires are reserved inside the storage barrel of the present invention. The four storage columns winding different welding wires are distributed in a circular pattern around the connecting frame, and the output at the position of the connecting frame can drive the four storage columns to rotate, adjusting the different types of storage columns at the upper end of the transmission cavity and the welding wires inside the storage columns. Among them, a limiting frame for restricting the welding wires is independently welded to each of the four storage columns. During welding, the welding wire required for the previous welding will remain in the diversion frame. When storing the welding wire inside the diversion frame to the outside of the storage column, a section of the welding wire can be reserved and clamped by a pair of third pressing blocks. By clamping with the pair of third pressing blocks, it is convenient for the storage column to rotate and release materials, and the welding wire can quickly and efficiently and stably flow back into the diversion frame again, which is convenient for improving the welding wire, enabling the welding wire to cope with different welding materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic diagram of the overall external structure of the present invention;

[0040] Figure 2 is a schematic diagram of the positional relationship of the gas storage tank of the present invention;

[0041] Figure 3 is an exploded view of the internal structure of the storage barrel of the present invention;

[0042] Figure 4 is a cross-sectional view of the internal structure of the storage barrel of the present invention;

[0043] Figure 5 is of the present invention Figure 4 partial enlarged view of area A therein;

[0044] Figure 6 is a schematic diagram of the external structure of the limiting frame of the present invention;

[0045] Figure 7 is a cross-sectional view of the internal structure of the storage column of the present invention;

[0046] Figure 8 is a schematic diagram of the structure of the anti-soldering tin dredging head assembly of the present invention;

[0047] Figure 9 is of the present invention Figure 8 partial enlarged view of area B therein;

[0048] Figure 10 is a schematic diagram of the welding system of the present invention.

[0049] In the figure: 4. Laser emission end; 5. Flow guide frame; 6. Storage barrel; 7. Sealing sheet; 8. Display screen; 9. Blower; 10. Gas storage tank; 11. Electronic gas valve; 12. Four-way pipe; 13. Transmission cavity; 14. Connecting frame; 15. Storage column; 16. Extension rod; 17. Restriction frame; 18. First flow guide strip; 19. Extension block; 20. Second flow guide strip; 21. First extrusion block; 22. Second extrusion block; 23. Third extrusion block; 24. Infrared rangefinder; 25. First motor; 26. Second motor; 27. Anti-solder clogging head assembly; 28. Sealing housing; 29. Flow guide channel; 30. Sealing ring; 31. Accommodating groove; 32. Inner push sealing pipe; 33. First reset spring; 34. First communication pipe; 35. Guide groove; 36. Limit ring; 37. Second communication pipe; 38. Opening and closing baffle one; 39. Second reset spring; 40. Limit connecting rod; 41. Guide member; 42. Discharge pipe; 43. Opening and closing baffle two; 44. Avoidance groove; 45. Card slot. Detailed implementation mode

[0050] The present invention will be further described below in conjunction with specific embodiments.

[0051] Embodiment 1: As Figure 1 and Figure 2 shown, a laser welding head with a rotating wire feeding function in this embodiment includes a laser emission end 4. After the laser emitted inside the laser emission end 4 contacts the material to be welded, it melts the irradiated position and realizes welding. During the welding process, the required welding wire and protective gas are additionally stored on one side of the laser emission end 4. A storage barrel 6 is arranged on one side outside the laser emission end 4. A connecting frame 14 is arranged in the middle inside the storage barrel 6. Four storage columns 15 are evenly distributed around between the outside of the connecting frame 14 and the inner wall of the storage barrel 6. Four kinds of welding auxiliary welding wires can be respectively wound around the outside of the storage columns 15. The center position of one end of the storage column 15 is rotationally connected to the connecting frame 14. The outer wall of the connecting frame 14 is respectively provided with a second motor 26 towards the four storage columns 15, and the output shaft of the second motor 26 passes through the connecting frame 14 and is welded and fixed to the center position of the storage column 15. By the output of the second motor 26, the storage column 15 can be rotated, and the rotation of the storage column 15 can respond to the release and recovery of the externally wound welding wire;

[0052] Among them, as Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, at one end of the connecting frame 14 facing the storage column 15, extension rods 16 are all extended. At one end of the extension rod 16, a limiting frame 17 is provided. On both sides inside the limiting frame 17, third extrusion blocks 23 are provided. One end of the welding wire wound around the outside of the storage column 15 is always clamped between a pair of third extrusion blocks 23. When the welding wire is recycled into the recovery diversion frame 5, the welding wire is stored at the clamping position inside the limiting frame 17, and one end of the welding wire wound around the outside of the storage column 15 is clamped by the third extrusion blocks 23, which is convenient for the release and discharge of the welding wire, and is convenient for the welding wire to be stably transmitted towards the inside of the diversion frame 5 after being restricted by the pair of third extrusion blocks 23;

[0053] As Figure 3 and Figure 4 shown, in order to avoid the reduction of the welding effect caused by the protective gas not being able to completely cover the welding position, a blower 9 is provided on one side of the middle of the lower end of the storage barrel 6. Three gas storage tanks 10 are horizontally arranged at the rear end of the storage barrel 6, and the outside of the gas storage tanks 10 is stuck outside the storage barrel 6. At the lower ends of the three gas storage tanks 10, electronic gas valves 11 for controlling gas release are hermetically provided. The lower ends of the three electronic gas valves 11 and the air inlet of the blower 9 are hermetically connected through a four-way pipe 12. After one of the electronic gas valves 11 is opened, the blower 9 can extract the corresponding protective gas released from the four-way pipe 12;

[0054] Among them, the air outlet of the blower 9 is hermetically connected to the middle position of the lower end of the storage barrel 6. After one of the electronic gas valves 11 is opened, the gas extracted by the blower 9 will be directly transmitted into the storage barrel 6, and the gas transmitted into the storage barrel 6 will flow into the diversion frame 5 together with the welding wire through the transmission cavity 13. The protective gas will completely wrap the welding wire inside the diversion frame 5 and finally be discharged together with the welding wire from the position of the extension block 19:

[0055] In addition, as Figure 1 and Figure 2 shown, a first motor 25 is provided at the middle position of the upper end of the storage barrel 6, and the output shaft of the first motor 25 passes through the storage barrel 6 and is welded and fixed to the upper end of the connecting frame 14. The output shaft of the first motor 25 can adjust the four storage columns 15 and adjust the four storage columns 15 and the welding wire wound around the outside;

[0056] In order to stably feed the welding wire into the lower end of the laser emission end 4 after the welding wire is transmitted into the transmission cavity 13, a transmission cavity 13 is provided on one side of the storage barrel 6 facing the laser emission end 4. A diversion frame 5 is provided at the lower end of the transmission cavity 13, and the diversion frame 5 is welded and fixed to the lower end of the storage barrel 6. As Figure 3 and Figure 4As shown, the diversion frame 5 is located on one side of the laser emission end 4. An extension block 19 extends downward from the lower end of the diversion frame 5 towards the lower end of the laser emission end 4, and the angle between the extension block 19 and the diversion frame 5 is ninety degrees. After being diverted by the diversion frame 5, during the process of being transmitted towards the extension block 19, the welding wire will bend and approach the welding position;

[0057] Among them, in order to stably enable the welding wire to be transmitted within the diversion frame 5, as Figure 4 shown, first extrusion blocks 21 are provided at both the upper and lower ends and on both sides of the middle position inside the diversion frame 5. The welding wire transmitted into the transmission cavity 13 will be clamped by three pairs of first extrusion blocks 21 and stably transmitted towards the extension block 19;

[0058] As Figure 4 shown, in addition, a second extrusion block 22 is provided at the position of the first extrusion block 21 on the side of the lower end of the extension block 19 towards the inside of the diversion frame 5. When the welding wire transmitted through the diversion frame 5 reaches the inside of the extension block 19, the clamping by a pair of first extrusion blocks 21 is changed to the clamping of the welding wire by one first extrusion block 21 and one second extrusion block 22, completing the transmission of the welding wire, so that the welding wire can be stably discharged from the position of the extension block 19.

[0059] In order to prevent the welding wire from bending between adjacent pairs of first extrusion blocks 21 and causing the welding wire to get stuck inside the diversion frame 5, first diversion strips 18 are provided on both sides between adjacent pairs of first extrusion blocks 21, and the first diversion strips 18 are welded and fixed to the diversion frame 5. The front and rear ends of the first extrusion blocks 21 are rotatably connected to the inside of the diversion frame 5, and the front and rear ends of the second extrusion blocks 22 are rotatably connected to the inside of the extension block 19. When the first extrusion blocks 21 and the second extrusion blocks 22 rotate, the friction generated during the transmission of the welding wire can be offset, improving the welding effect;

[0060] In order to facilitate understanding the remaining amount of the welding wire outside the storage column 15, as Figure 4 shown, an infrared rangefinder 24 is provided on one side of the upper end of the transmission cavity 13. The infrared rangefinder 24 is aligned with one of the storage columns 15 close to the transmission cavity 13. The distance to the welding wire wound around the outside of the storage column 15 is measured by the infrared rangefinder 24, and the length of the distance corresponds to the amount of the welding wire wound outside;

[0061] In order to facilitate the control of the selection of the storage column 15 and the gas storage tank 10, as Figure 1 and Figure 2 shown, a display screen 8 is provided on one side outside the storage barrel 6. The display screen 8 can display the selected welding wire and the shielding gas;

[0062] In order to prevent the welding wire from colliding between the bending positions of the extension block 19 and the diversion frame 5, as Figure 4As shown, a quarter-circular second diversion strip 20 is provided between the extension block 19 and the diversion frame 5;

[0063] In addition, as Figure 8 and Figure 9 shown, the anti-solder dredging head assembly 27 includes: a sealing housing 28, which is fixedly embedded in the extension block 19 and located at its end. A diversion channel 29 is provided at the tail of the sealing housing 28 and is communicated with the internal channel of the extension block 19. A receiving groove 31 is formed in the sealing housing 28. An inner push sealing tube 32 is movably arranged in the receiving groove 31. A first return spring 33 is sleeved on the outer wall of the inner push sealing tube 32, and the inner push sealing tube 32 is connected to the inner wall of the sealing housing 28 through the first return spring 33. One end of a connecting pipe 34 is fixedly connected to the inner wall of the sealing housing 28, and the tail of the connecting pipe 34 is connected to the diversion channel 29 through a sealing ring 30. The other end of the connecting pipe 34 extends into the inner push sealing tube 32 movably. A limiting ring 36 is fixedly sleeved at the end of the connecting pipe 34 extending into the inner push sealing tube 32. Guide grooves 35 are symmetrically arranged on the inner wall of the inner push sealing tube 32, and the limiting ring 36 is slidably connected to the guide grooves 35. The ends of both the sealing housing 28 and the inner push sealing tube 32 are of a tapered head structure. An opening and closing baffle 38 is rotatably arranged on the inner wall of the inner push sealing tube 32, and a torsion spring is arranged on the rotating shaft of the opening and closing baffle 38. An avoidance groove 44 is formed in the tapered head of the inner push sealing tube 32. A limiting connecting rod 40 is fixedly connected to the side wall of the avoidance groove 44. A second return spring 39 is installed in the avoidance groove 44. A connecting pipe 37 is movably arranged in the tapered head of the inner push sealing tube 32, and a guiding member 41 is fixedly arranged on the outer wall of the connecting pipe 37. One end of the limiting connecting rod 40 away from the inner wall of the inner push sealing tube 32 is movably arranged in the guiding member 41. One end of the second return spring 39 close to the guiding member 41 is fixedly connected to the guiding member 41. A discharge pipe 42 is fixedly embedded in the tapered head structure of the sealing housing 28, and an opening and closing baffle 43 is rotatably arranged at the outlet of the discharge pipe 42, and a torsion spring is arranged on the rotating shaft of the opening and closing baffle 43. A clamping groove 45 is formed at the inner wall of the tapered head of the sealing housing 28.

[0064] The working principle and beneficial effects of the above scheme are as follows: when in use, the fan 9 actively extracts the protective gas stored in the gas storage tank 10, so that the protective gas flows into the storage barrel 6 and enters the transmission chamber 13 together with the welding wire, and enters the guide frame 5 before the welding wire, passes through the guide channel 29 inside it, enters the connecting pipe 34, and enters the inner push sealing tube 32 along the connecting pipe 34 to accumulate. Since the inner push sealing tube 32 is in a sealed state, more and more gas accumulated inside it will push the inner push sealing tube 32 to move along the limiting ring 36 toward the conical direction close to the sealing shell 28, until the connecting pipe 37 enters the discharge pipe 42 and pushes the opening and closing baffle 43 outward, while clearing the discharge pipe 42, thereby preventing the solder liquid splashing during the soldering process from clogging the channel. When the guide member 41 arranged on the outer wall of the connecting pipe 37 enters the card slot 45, the connecting pipe 3 7 cannot move, and the gas in the inner push sealing tube 32 continues to increase, so that the conical head of the inner push sealing tube 32 continues to move along the guide member 41 through the limit connecting rod 40 and compresses the reset spring 2 39. At this time, the tail of the connecting pipe 2 37 pushes the opening and closing baffle 1 38 to open. At this point, the guide channel 29, the connecting pipe 1 34, the connecting pipe 2 37, and the discharge pipe 42 are all connected so that the welding wire can be discharged while the protective gas is discharged. The above method can prevent the solder liquid splashed during the soldering process from clogging the guide frame 5, and when the soldering is completed and the welding wire is recovered, the opening and closing baffle 1 38 and the opening and closing baffle 2 43 are closed under the action of the torsion spring, and the reset spring 1 33 and the reset spring 2 39 can also synchronously drive the inner push sealing tube 32 and the connecting pipe 1 34 to reset. At this time, the connecting pipe 2 37 is once again moved to clear the discharge pipe 42 to prevent blockage.

[0065] Example 2: Since the laser welding head has a rotating wire feeding function, the welding operation is performed through the synergistic effect of the laser emitting end, welding wire, and shielding gas. During the welding process, the laser emitting end melts the material to be welded through a high-power laser, while the welding wire and shielding gas are sent out from the storage barrel and transmitted to the welding point through the transmission cavity. In order to ensure the accuracy and stability of welding, the following multiple sensors are used to monitor and control multiple key variables in the welding process.

[0066] A laser power density sensor is installed in front of the laser emitting end 4 and is directly aligned with the laser beam to monitor the actual output value of the laser power;

[0067] An infrared temperature sensor is installed on the side or above the laser emitting end 4 to ensure that its viewing angle is not disturbed by the laser beam and can clearly receive the temperature information of the welding area;

[0068] An optoelectronic sensor is installed in the wire feeding area before the welding wire enters the transmission cavity 13, and the sensor is placed parallel to the welding wire for detecting the movement speed of the welding wire;

[0069] A flow sensor is installed in the gas flow pipeline to ensure that the flow rate of the shielding gas entering the welding area can be monitored in real time;

[0070] A 3D vision sensor is installed between the welding head and the welding surface for scanning the shape and depth of the welding surface;

[0071] A controller and an alarm are set on the frame on the outer wall of the laser welding head housing;

[0072] The controller controls the operation of the alarm based on the laser power density sensor, the infrared temperature sensor, the optoelectronic sensor, the flow sensor, and the 3D vision sensor, including the following steps:

[0073] Step 1: The controller calculates the control coefficient of the laser welding head during the welding process based on the detection values of the laser power density sensor, the infrared temperature sensor, the optoelectronic sensor, the flow sensor, and the 3D vision sensor and Formula 1:

[0074]

[0075] Among them, is the control coefficient during the welding process, represents the laser power output value detected by the laser power density sensor; represents the temperature of the welding area detected by the temperature sensor; represents the wire feeding speed detected by the optoelectronic sensor; represents the flow rate of the shielding gas detected by the flow sensor; represents the actual size of the welding surface scanned by the 3D vision sensor; represents the preset size of the welding surface, represents the actual gas flow velocity; represents the reference gas flow velocity;

[0076] Step 2: The controller calculates the accuracy index of the laser welding head based on Step 1 and Formula (2):

[0077]

[0078] Among them, is the accuracy index of the laser welding head, represents the preset reference temperature; represents the preset wire feeding speed;

[0079] Step 3: The controller compares the precision index of the laser welding head with a preset precision index. When the precision index of the laser welding head is less than the preset precision index, the controller controls the alarm to give an alarm prompt.

[0080] The working principle and beneficial effects of the above solution are as follows: Since the welding precision directly affects the quality and stability of the welded joint. If multiple factors such as laser power, wire feeding speed, temperature, and gas flow rate during the welding process get out of control, it may lead to a reduction in the strength of the welded joint or even failure. Through the above two formulas, various parameters of the welding process can be quantified and optimized.

[0081] Among them, represents the laser power output detected by the laser power density sensor. The intensity of the laser during the welding process determines the heating effect of the welding area. Too low power density may result in insufficient welding, while too high power may cause the welding point to overheat and affect the joint strength.

[0082] is the temperature of the welding area detected by the temperature sensor. Too high or too low temperature during welding will affect the quality of the weld seam. If the temperature is uneven, it may lead to instability in the heat-affected zone, forming cracks or pores.

[0083] is the wire feeding speed. The wire feeding speed directly affects the size and shape of the weld seam. If the feeding speed is too fast, it may cause the molten pool to overflow; if it is too slow, it may lead to insufficient welding.

[0084] is the protective gas flow rate. The role of the protective gas is to isolate impurities in the air and prevent oxidation. Unstable or too low gas flow rate may result in unsatisfactory protection effect and affect the welding quality.

[0085] is the actual size of the welding surface. The shape of the welding surface is detected in real time by a 3D vision sensor. If the actual welding surface is significantly different from the expected one, it may affect the strength and stability of the welding.

[0086] is the reference welding surface size. Ideally, the welding surface should conform to the predetermined shape and size. By comparing the 3D vision sensor with the actual surface, the welding precision can be evaluated.

[0087] is the actual gas flow velocity. The gas flow velocity is crucial for the stability of protecting the welding area. If the gas flow velocity is too high or too low, it may affect the protection effect and welding quality.

[0088] Therefore, in formula (1) It reflects the balance relationship between laser power, welding temperature, wire feeding speed, and gas flow rate. An excessively high or low power and temperature ratio will affect the welding quality. It describes the deviation of the welding surface morphology. If the difference between the actual surface and the reference surface morphology is too large, it may lead to a decline in welding quality. It describes the influence on the coverage of the shielding gas in the welding area and the welding stability. If the deviation of the gas flow rate is too large, it will affect the effectiveness of the shielding gas. In formula (II) It indicates that if the deviation of the welding temperature is large, it will lead to performance differences in the welded joint, affecting the strength and quality of the welding. It indicates that the wire feeding speed directly affects the size of the welding line, and too large a deviation may lead to uneven welding. It indicates that the deviation of the welding surface shape affects the joint quality, and too large a deviation will lead to unstable welding strength.

[0089] By combining the control factors of the welding process (such as laser power, temperature, wire speed, gas flow, etc.) with the real-time feedback of welding accuracy (such as surface shape, wire depth, etc.) in two formulas, the two formulas not only increase the accuracy in the welding process but also can greatly improve the practicability and stability of the welding head.

[0090] 1. Real-time monitoring and feedback mechanism: Through the introduction of sensor monitoring, each key parameter in the welding process can be monitored in real time. The formula calculation results will help the system understand the current state of each variable and make precise adjustments based on real-time data.

[0091] 2. Optimize welding quality: By optimizing control parameters (such as wire feeding speed, gas flow rate, laser power, etc.), it can ensure that each link in the welding process is in the best state. In this way, not only common problems in the welding process (such as too high or too low temperature, insufficient gas flow, unstable wire feeding, etc.) are avoided, but also the strength and stability of the welded joint can be effectively improved.

[0092] 3. Reduce manual intervention: Since the formula comprehensively considers multiple welding variables, technicians only need to set the initial parameters, and the system can automatically adjust the welding process according to real-time data, reducing manual intervention and improving work efficiency and welding consistency.

[0093] Through the above methods, it is possible to comprehensively and precisely control each important parameter in the welding process. This precise control can not only improve the welding accuracy but also reduce errors, ensuring that the welded joint has higher stability and strength. Through real-time monitoring and adjustment, a high degree of automation and optimization are achieved, which greatly improves the practicability of the welding head and also demonstrates the innovation of the technology.

[0094] Embodiment 3: To facilitate winding different welding wires around the corresponding storage column 15, a through hole is provided through the front end of the outer part of the storage barrel 6. As shown in Figure 3 shown, a sealing piece 7 is provided at the front end of the storage barrel 6, and the sealing piece 7 is sealingly connected to the through hole. The sliding and removal of the sealing piece 7 can expose the internal storage column 15.

[0095] To further understand the content of the present invention, please refer to Figure 10 , the following technical solutions are provided in this embodiment:

[0096] A laser welding head with a rotating wire feeding function further includes a welding system built in the display screen 8. The welding system includes an input module, an input module, an identification module, an adjustment module, a wire depth detection module, a speed calculation module, and a motor control module. Among them: Input module: It is used for the user to input what the two materials to be welded are respectively. This information will serve as the basis for subsequent identification and matching. It performs a preliminary format check on the input information to ensure the validity and accuracy of the input information, avoid the system being unable to operate normally due to incorrect input, provide basic data for determining the welding materials for the entire system, and is the basis for subsequent selection of different welding wires and different shielding gases;

[0097] Input module: It is used to pre-enter the materials to be welded by the laser welding head subsequently, and independently enter a corresponding welding wire and shielding gas for each entered material. It performs a preliminary sorting and storage of the entered information to form a database, marks different materials to be welded in advance. After inputting and identifying the corresponding materials to be welded in the input module, the corresponding welding wire and shielding gas can be directly used, avoiding the need for different users to spend time selecting welding wires and shielding gases when using the laser welding head, and at the same time avoiding the reduction of welding effect caused by selecting the wrong welding wire and shielding gas, and ensuring that the data is saved in a format that the system can recognize and call;

[0098] Identification module: It is used to search and match in the database pre-established by the input module according to the information of the materials to be welded provided by the input module, identify the corresponding welding wire and shielding gas for each material, accurately find the welding wire and shielding gas corresponding to the materials to be welded, and provide correct data basis for subsequent adjustment and use, which is the key to ensuring welding quality;

[0099] Adjustment module: It is used to send a start signal to start the first motor 25, the corresponding electronic gas valve 11, and the blower 9 for the corresponding welding wire and shielding gas determined by the identification module, adjust the corresponding welding wire and shielding gas to the position to be used, and the welding wire and shielding gas are in the state to be used, directly providing the required materials for the welding operation, improving the accuracy and stability of the welding operation, and helping to obtain high-quality welding results;

[0100] Wire depth detection module: It is used to detect the winding depth of the welding wire at a fixed position through the infrared rangefinder 24, so as to determine the diameter of the circle formed by the welding wire, convert the detected winding depth data into digital signals that the system can recognize and process, accurately obtain the welding wire winding depth information, provide an accurate basis for adjusting the rotation speed of the second motor 26 subsequently, contribute to realizing precise control of wire release and recovery, timely detect changes in the wire winding state, so that the system can make corresponding adjustments, and improve the stability and reliability of the entire welding process;

[0101] Speed calculation module: It is used to calculate the ideal rotation speed of the motor at different stages during wire release and recovery according to the winding depth information transmitted by the wire depth detection module by using a preset algorithm. When releasing the wire, calculate the value that makes the rotation speed gradually increase according to the diameter change situation. When recovering the wire, calculate the value that makes the rotation speed gradually decrease, realize the accurate calculation of the motor rotation speed, ensure that the wire can be released and recovered at the desired speed, ensure the smooth progress of the welding process. Based on the accurate calculation results, it can improve the utilization rate of the wire, reduce wire waste, and also contribute to improving the welding quality;

[0102] Motor control module: It is used to receive the rotation speed instruction of the second motor 26 calculated by the speed calculation module and convert it into an actual control signal for the second motor 26, control the rotation of the output shaft of the second motor 26, and have basic control functions such as motor start, stop, forward and reverse rotation, and can accurately adjust the output rotation speed of the second motor 26 according to different speed instructions. When recovering the wire and controlling the rotation of the output shaft of the second motor 26, determine the length of the recovered wire according to the speed calculated by the speed calculation module and the start time of the second motor 26. Among them, the length fixed inside the diversion frame 5 and the extension block 19. After the speed calculated by the speed calculation module multiplied by the motor start time reaches the length inside the diversion frame 5 and the extension block 19, stop the start of the second motor 26, so that one end of the wire stays inside the limiting frame 17 and is clamped by the third pressing block 23, realize the effective control of the second motor 26, make the second motor 26 operate at the calculated speed, so as to realize the correct release and recovery of the wire. Precise control of the second motor 26 helps to improve the automation degree of the entire welding system, reduce manual intervention, and improve work efficiency.

[0103] Working principle: When using a laser welding head to weld a welding position, the laser emission end 4 is aligned with the welding position from top to bottom. The output shaft of the first motor 25 drives the connecting frame 14 to rotate through the storage barrel 6. The rotation of the connecting frame 14 can drive the storage column 15 and the welding wire wound outside the storage column 15 to be adjusted, aligning the required welding wire with the upper end of the transmission cavity 13. Start the second motor 26 corresponding to the limiting frame 17 at the upper end of the transmission cavity 13. The output of the second motor 26 can drive the storage column 15 to rotate, and the rotation of the storage column 15 will discharge the wound welding wire. The welding wire passes through the limiting frame 17 and is clamped by the third extrusion block 23 and then transmitted towards the transmission cavity 13. The welding wire flows into the inside of the diversion frame 5 from the transmission cavity 13. After being clamped between the first extrusion block 21 and the second extrusion block 22 and diverted by the first diversion strip 18 and the second diversion strip 20, the material flowing into the inside of the diversion frame 5 is discharged from inside the extension block 19 and directly discharged to the lower end of the laser emission end 4. At the same time, the electronic gas valve 11 at the lower end of the gas storage tank 10 corresponding to the selected shielding gas is opened. After the electronic gas valve 11 is opened, the blower 9 actively extracts the shielding gas stored inside the gas storage tank 10, causing the shielding gas to flow into the inside of the storage barrel 6 and enter the transmission cavity 13 together with the welding wire, and finally discharging the shielding gas at the position where the welding wire is discharged.

[0104] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0105] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention.

Claims

1. A laser welding head with a rotary wire feeding function, comprising a laser emitting end (4), characterized in that: A storage bucket (6) is provided on one side outside the laser emitting end (4), a connecting frame (14) is provided in the middle of the storage bucket (6), and second motors (26) are provided on the outer wall of the connecting frame (14) facing four storage columns (15), respectively; a fan (9) is provided on one side in the middle of the lower end of the storage bucket (6), a transmission cavity (13) is provided on the side inside the storage bucket (6) facing the laser emitting end (4), and an infrared rangefinder (24) is provided on one side of the upper end of the transmission cavity (13); three gas storage tanks (10) are provided laterally at the rear end of the storage bucket (6), and the three gas storage tanks (10) are provided at the rear end of the storage bucket (6). The lower end of the storage bucket (10) is sealed with an electronic gas valve (11), the lower ends of the three electronic gas valves (11) and the air inlet of the fan (9) are sealed and connected via a four-way pipe (12), the air outlet of the fan (9) is sealed and connected to the middle position of the lower end of the storage bucket (6), the middle position of the upper end of the storage bucket (6) is provided with a first motor (25), and a display screen (8) of a built-in welding system is provided on one side of the outside of the storage bucket (6), and the welding system comprises: an input module: used for inputting the types of two materials to be welded, as a basis for subsequent identification and matching, and performing a preliminary format check on the input information; Input module: used to input the materials for subsequent welding of the laser welding head in advance, and to input a welding wire and shielding gas to be used for each input material separately, to preliminarily organize and store the input information, to form a database, and to mark different materials to be welded in advance; Identification module: used to search and match the information of the materials to be welded provided by the input module in the database pre-established by the input module, and identify the welding wire and shielding gas corresponding to each material; An adjustment module: used to send a start signal to start the first motor (25), the corresponding electronic gas valve (11) and the fan (9) according to the corresponding welding wire and shielding gas determined by the identification module; Welding wire depth detection module: used to detect the winding depth of the welding wire at a fixed position by means of an infrared rangefinder (24), determine the diameter of the circle formed by the welding wire, and provide an accurate basis for subsequent adjustment of the rotation speed of the second motor (26); Speed ​​calculation module: used to calculate the ideal rotation speed of the motor at different stages of releasing and recovering the welding wire according to the winding depth information transmitted by the welding wire depth detection module using a preset algorithm; The motor control module is used to receive the rotation speed instruction of the second motor (26) calculated by the speed calculation module, and convert it into an actual control signal for the second motor (26), thereby controlling the rotation of the output shaft of the second motor (26), and being able to accurately adjust the output speed of the second motor (26) according to different speed instructions.

2. The laser welding head with rotary wire feeding function according to claim 1, characterized in that: Four storage columns (15) are evenly distributed around the outside of the connecting frame (14) and the inner wall of the storage barrel (6); the center positions of the storage columns (15) are rotatably connected to the connecting frame (14); and the output shaft of the second motor (26) passes through the connecting frame (14) and is welded and fixed to the center positions of the storage columns (15).

3. The laser welding head with rotary wire feeding function according to claim 2, characterized in that: An extension rod (16) is provided at one end of the connection frame (14) facing the storage column (15), a limiting frame (17) is provided at one end of the extension rod (16), and third extrusion blocks (23) for clamping the welding wire are provided on both sides of the limiting frame (17).

4. The laser welding head with rotary wire feeding function according to claim 3, characterized in that: The output shaft of the first motor (25) is welded and fixed to the upper end of the connecting frame (14) through the storage barrel (6).

5. The laser welding head with rotary wire feeding function according to claim 4, characterized in that: The lower end of the transmission cavity (13) is provided with a flow guide frame (5) welded and fixed to the storage barrel (6), and the lower end of the flow guide frame (5) is provided with an extension block (19) extending toward the lower end of the laser emitting end (4), and an anti-solder dredging head assembly (27) is installed in the extension block (19).

6. The laser welding head with rotary wire feeding function according to claim 5, characterized in that: First extrusion blocks (21) are rotatably arranged at both ends of the guide frame (5) and at both sides of the middle position; a second extrusion block (22) rotatably connected to the extension block (19) is arranged in the guide frame (5) toward the position of the first extrusion block (21); and first guide strips (18) welded and fixed to the guide frame (5) are arranged on both sides between two adjacent pairs of the first extrusion blocks (21).

7. The laser welding head with rotary wire feeding function according to claim 6, characterized in that: The infrared rangefinder (24) is aligned with one of the storage columns (15) close to the transmission cavity (13).

8. The laser welding head with rotary wire feeding function according to claim 6, characterized in that: A laser power density sensor, installed in front of the laser emitting end (4) and directly aligned with the laser beam for monitoring the actual output value of the laser power; An infrared temperature sensor is installed on the side or above the laser emitting end (4) to ensure that its viewing angle is not disturbed by the laser beam and that it can clearly receive temperature information of the welding area; A photoelectric sensor is installed in the wire feeding area before the welding wire enters the transmission cavity (13), and the sensor is placed parallel to the welding wire, and is used to detect the movement speed of the welding wire; Flow sensor, installed in the gas flow pipeline, ensures real-time monitoring of the shielding gas flow entering the welding area; 3D vision sensor, installed between the welding head and the welding surface, used to scan the shape and depth of the welding surface; The controller and the alarm are arranged on the frame of the outer wall of the laser welding head shell; The controller controls the alarm to work based on the laser power density sensor, infrared temperature sensor, photoelectric sensor, flow sensor, and 3D vision sensor, including the following steps: Step 1: The controller calculates the control coefficient of the laser welding head during the welding process based on the detection values ​​of the laser power density sensor, infrared temperature sensor, photoelectric sensor, flow sensor, and 3D vision sensor and formula (1): in, is the control coefficient during welding, Indicates the laser power output value detected by the laser power density sensor; Indicates the temperature of the welding area detected by the temperature sensor; Indicates the wire feeding speed detected by the photoelectric sensor; Indicates the protective gas flow rate detected by the flow sensor; Indicates the actual size of the welding surface scanned by the 3D vision sensor; Indicates the preset welding surface size, Indicates the actual gas flow rate; represents the reference gas flow rate; Step 2: The controller calculates the accuracy index of the laser welding head based on step 1 and formula (2): in, is the accuracy index of the laser welding head, Indicates the preset reference temperature; Indicates the preset wire feeding speed; Step 3: The controller compares the accuracy index of the laser welding head with a preset accuracy index. When the accuracy index of the laser welding head is less than the preset accuracy index, the controller controls the alarm to issue an alarm prompt.

9. The laser welding head with rotary wire feeding function according to claim 5, characterized in that: The anti-solder dredging head assembly (27) comprises: a sealing shell (28), the sealing shell (28) is fixedly embedded in the extension block (19) and is located at the end thereof, a guide channel (29) is provided at the tail of the sealing shell (28) and is communicated with the internal channel of the extension block (19), a receiving groove (31) is provided in the sealing shell (28), an inner push sealing tube (32) is movably arranged in the receiving groove (31), and a return spring (33) is sleeved on the outer wall of the inner push sealing tube (32), and the inner push sealing tube (32) is connected to the sealing shell through the return spring (33). The connecting pipe (34) is connected to the inner wall of the sealing housing (28), one end of the connecting pipe (34) is fixedly connected to the inner wall of the sealing housing (28), and the tail of the connecting pipe (34) is connected to the guide channel (29) through the sealing ring (30), the other end of the connecting pipe (34) is movably extended into the inner push sealing tube (32), one end of the connecting pipe (34) extending into the inner push sealing tube (32) is fixedly sleeved with a limiting ring (36), the inner wall of the inner push sealing tube (32) is symmetrically provided with guide grooves (35), and the limiting ring (36) is slidably connected to the guide grooves (35), The sealing shell (28) and the end of the inner push sealing tube (32) are both of a conical head structure. The inner wall of the inner push sealing tube (32) is rotatably provided with an opening and closing baffle plate (38), and a torsion spring is provided on the rotating shaft of the opening and closing baffle plate (38). An avoidance groove (44) is provided in the conical head of the inner push sealing tube (32). The limiting connecting rod (40) is fixedly connected to the side wall of the avoidance groove (44). A reset spring (39) is installed in the avoidance groove (44). A connecting pipe (37) is movably provided in the conical head of the inner push sealing tube (32), and the connecting pipe (37) is externally connected to the conical head of the inner push sealing tube (32). A guide member (41) is fixedly provided on the wall, one end of the limiting connecting rod (40) away from the inner wall of the inner push sealing tube (32) is movably provided in the guide member (41), one end of the second return spring (39) close to the guide member (41) is fixedly connected to the guide member (41), the discharge pipe (42) is fixedly embedded in the conical head structure of the sealing shell (28), and an opening and closing baffle plate (43) is rotatably provided at the outlet of the discharge pipe (42), and a torsion spring is provided on the rotating shaft of the opening and closing baffle plate (43), and a clamping groove (45) is provided on the inner wall of the conical head of the sealing shell (28).

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