Laser welding head with rotary wire feeding function

Abstract

The invention discloses a laser welding head with a rotary wire feeding function, and belongs to the technical field of laser welding heads. The laser welding head with the rotary wire feeding function comprises a laser emitting end, a storage barrel is arranged on one side of the exterior of the laser emitting end, a connecting frame is arranged in the middle of the interior of the storage barrel, and four storage columns are evenly distributed between the exterior of the connecting frame and the inner wall of the storage barrel in a surrounding mode. According to the laser welding head, the problems that in the welding process of an existing laser welding head, a welding wire is conveyed through a wire feeding part, a gas supply pipe is located on the other side of the wire feeding part, protective gas conveyed by the gas supply pipe cannot completely cover and wrap the welding wire, and the welding effect is reduced are solved; and one electronic gas valve is opened to release the corresponding protective gas, so that the gas is matched with the welding wire to correspond to different welding materials, and the protective gas is discharged from the position of the extension block along with the welding wire.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding heads, in particular to a laser welding head with a rotary wire feeding function. Background Art

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

[0003] A Chinese patent with announcement number CN221791424U discloses a laser welding head with a wire feeding function and a laser welding device, including a first wire feeding part, which is connected to a welding nozzle and is provided with a wire feeding channel. The wire feeding channel has a wire outlet, which is located on one side of the laser beam and is used to deliver the welding wire to the welding point during welding. The laser welding head with a wire feeding function is provided with a first wire feeding part on the welding nozzle, and the first wire feeding part is provided with a wire feeding channel. When welding a workpiece, the welding wire can be delivered to the welding point through the wire feeding channel of the first wire feeding part, so as to replenish the welding wire when welding the workpiece and ensure the welding quality.

[0004] In the laser welding head of 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, causing the welding wire to easily contact the external gas during welding and thus fail 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 reduced welding effect. Summary of the invention

[0005] The purpose of the present invention is to provide a laser welding head with a rotary wire feeding function. After the surrounding storage column is driven to rotate by the first motor, one of the electronic gas valves is opened to release the corresponding protective gas, so that the gas is matched with the welding wire to correspond to different welding materials, and the protective gas is discharged from the extension block position together with the welding wire, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser welding head with a rotary wire feeding function, comprising a laser emitting end, a storage barrel is arranged on one side outside the laser emitting end, a connecting frame is arranged in the middle of the storage barrel, four storage columns are evenly distributed around the outside of the connecting frame and the inner wall of the storage barrel, a fan is arranged on one side in the middle of the lower end of the storage barrel, three gas storage tanks are transversely arranged at the rear end of the storage barrel, and electronic gas valves are sealed at the lower ends of the three gas storage tanks. The lower ends of the three electronic gas valves and the air inlet of the fan are sealed and connected by a four-way pipe, and the air outlet of the fan is sealed and connected to the middle position of the lower end of the storage barrel. After output, the connecting frame can drive the storage column and adjust the position of the storage column, adjust the type of welding wire at the upper end of the transmission cavity, adjust the opening of the corresponding electronic gas valve, and adjust the protective gas discharged from the gas storage tank, so that the gas and welding wire can correspond to different welding requirements.

[0007] Preferably, the center position of the storage column is rotatably connected to the connecting frame, and a second motor is respectively provided on the outer wall of the connecting frame facing the four storage columns, and the output shaft of the second motor passes through the connecting frame and is welded and fixed to the center position of the storage column. After rotating and adjusting the storage column, the second motor can output independently and rotate the storage column after power is supplied.

[0008] Preferably, an extension rod is provided at one end of the connecting frame facing the storage column, a limiting frame is provided at one end of the extension rod, and third extrusion blocks for clamping the welding wire are provided on both sides of the limiting frame. 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, a first motor is provided in the middle position of the upper end of the storage bucket, and the output shaft of the first motor passes through the storage bucket and is welded and fixed to the upper end of the connecting frame, and the storage column is driven to rotate through the output of the first motor and through the connecting frame.

[0010] Preferably, a transmission cavity is provided on the side of the storage barrel facing the laser emitting end, a guide frame welded and fixed to the storage barrel is provided at the lower end of the transmission cavity, an extension block is provided at the lower end of the guide frame extending toward the lower end of the laser emitting end, a solder-proof clearing head assembly is installed in the extension block, and the transmission of the welding wire can be facilitated by the extended guide frame and the extension block, so that the welding wire is transmitted to the lower end of the laser emitting end.

[0011] Preferably, first extrusion blocks are rotatably provided at the upper and lower ends and both sides of the middle position inside the guide frame, and a second extrusion block rotatably connected to the extension block is provided toward the position of the first extrusion block inside the guide frame, and first guide bars welded and fixed to the guide frame are provided on both sides between two adjacent pairs of the first extrusion blocks. After a pair of first extrusion blocks clamp the welding wire material, the first guide bar simultaneously limits the transmission of the welding wire to reduce collision and noise generated by the transmission of the welding wire.

[0012] Preferably, an infrared rangefinder is provided on one side of the upper end of the transmission cavity, and the infrared rangefinder is aimed at one of the storage columns close to the transmission cavity. The infrared rangefinder can detect the distance between the infrared rangefinder itself and the winding welding wire.

[0013] Preferably, a laser power density sensor is installed in front of the laser emitting end and is directly aligned with the laser beam to monitor the actual output value of the laser power; An infrared temperature sensor is installed on the side or above the laser emitting end to ensure that its viewing angle is not disturbed by the laser beam and can clearly receive the temperature information of the welding area; A photoelectric sensor is installed in the wire feeding area before the welding wire enters the transmission cavity, and the sensor is placed parallel to the welding wire 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.

[0014] Preferably, the anti-solder dredging head assembly comprises: a sealing shell, the sealing shell is fixedly embedded in the extension block and located at the end thereof, a guide channel is provided at the tail end of the sealing shell and is connected to the internal channel of the extension block, a receiving groove is opened in the sealing shell, an inner push sealing tube is movably arranged in the receiving groove, and a reset spring 1 is sleeved on the outer wall of the inner push sealing tube, and the inner push sealing tube is connected to the inner wall of the sealing shell through the reset spring 1, one end of a connecting pipe 1 is fixedly connected to the inner wall of the sealing shell, and the tail end of the connecting pipe 1 is connected to the guide channel through a sealing ring, the other end of the connecting pipe 1 is movably extended into the inner push sealing tube, one end of the connecting pipe 1 extending into the inner push sealing tube is fixedly sleeved with a limiting ring, the inner wall of the inner push sealing tube is symmetrically provided with guide grooves, and the limiting ring is slidably connected to the guide groove, and the sealing The sealing shell and the end of the inner push sealing tube are both conical head structures, the inner wall of the inner push sealing tube is rotatably provided with an opening and closing baffle, and a torsion spring is provided on the rotating shaft of the opening and closing baffle, an avoidance groove is provided in the conical head of the inner push sealing tube, the limiting connecting rod is fixedly connected to the side wall of the avoidance groove, and a reset spring is installed in the avoidance groove, a connecting pipe two is movably arranged in the conical head of the inner push sealing tube, and a guide piece is fixedly provided on the outer wall of the connecting pipe two, the end of the limiting connecting rod away from the inner wall of the inner push sealing tube is movably arranged in the guide piece, and the end of the reset spring two close to the guide piece is fixedly connected to the guide piece, the discharge pipe is fixedly embedded in the conical head structure of the sealing shell, and an opening and closing baffle two is rotatably provided at the outlet of the discharge pipe, and a torsion spring is provided on the rotating shaft of the opening and closing baffle two, and a card slot is provided on the inner wall of the conical head of the sealing shell.

[0015] The present invention provides another technical solution: a laser welding head with a rotary wire feeding function, further comprising a display screen located on one side of the outside of the storage barrel, wherein the display screen has a built-in welding system, and the welding system comprises: Input module: used for users to input the two materials to be welded. This information will serve as the basis for subsequent identification and matching, and a preliminary format check will be performed 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; The adjustment module is used to send a start signal to start the first motor, the corresponding electronic gas valve and the blower for the corresponding welding wire and the shielding gas determined by the identification module, and adjust the corresponding welding wire and the shielding gas to the position to be used; Welding wire depth detection module: 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 a digital signal that can be recognized and processed by the system, accurately obtain the welding wire winding depth information, and provide an accurate basis for the subsequent adjustment of the rotation speed of the second motor; 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. When releasing the welding wire, the value for gradually increasing the rotation speed is calculated according to the diameter change. When recovering the welding wire, the value for gradually reducing the rotation speed is calculated, so as to realize the accurate calculation of the motor rotation speed; Motor control module: used to receive the second motor rotation speed command 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, have basic control functions such as motor start, stop, forward and reverse rotation, and can accurately adjust the output speed of the second motor according to different speed commands.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 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 respectively. After the electronic gas valve at the lower end of the gas storage tank is opened, the required shielding gas can be released independently. The gas will be extracted by the fan and enter the guide frame from the transmission cavity along with the welding wire. Finally, the shielding gas and the welding wire can be transmitted through the guide frame and the extension block together and then discharged to the lower end of the laser emitting end. During the transmission inside the guide frame, the shielding gas can fully wrap and cover the welding wire used for welding, thereby preventing external gas from contacting the welding wire and causing a decrease in welding stability, thereby improving the welding effect.

[0017] 2. The present invention reserves four storage columns for winding welding wires inside the storage barrel. The four storage columns for winding different welding wires are distributed around the connecting frame as the center of the circle, and the output of the connecting frame position can drive the four storage columns to rotate, so as to adjust the storage column at the upper end of the transmission chamber and the different types of welding wires inside the storage column. Among them, the four storage columns are independently welded with a limiting frame for limiting the welding wire. During welding, the welding wire required for the previous welding will be retained in the guide frame, and when the welding wire inside the storage guide frame is stored to the outside of the storage column, a section of the welding wire can be reserved and clamped by a pair of third extrusion blocks. The clamping of the pair of third extrusion blocks makes it convenient for the storage column to rotate and release the material, so that the welding wire can flow into the guide frame again quickly, efficiently and stably, which is convenient for raising the welding wire, so that the welding wire can cope with different welding materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall external structure of the present invention; Figure 2 It is a schematic diagram of the position relationship of the gas storage tank of the present invention; Figure 3 An exploded view of the internal structure of the storage bucket of the present invention; Figure 4 This is a cross-sectional view of the internal structure of the storage bucket of the present invention; Figure 5 For the present invention Figure 4 A partial enlarged view of the middle A area; Figure 6 It is a schematic diagram of the external structure of the limiting frame of the present invention; Figure 7 It is a cross-sectional view of the internal structure of the storage column of the present invention; Figure 8 It is a schematic structural diagram of the anti-solder dredging head assembly of the present invention; Fig. 9 For the present invention Figure 8 A partial enlarged view of the middle B area; Fig.10It is a schematic diagram of the welding system of the present invention.

[0019] In the figure: 4, laser emitting end; 5, guide frame; 6, storage barrel; 7, sealing sheet; 8, display screen; 9, fan; 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, limiting frame; 18, first guide bar; 19, extension block; 20, second guide bar; 21, first extrusion block; 22, second extrusion block; 23, third extrusion block; 24, infrared rangefinder; 25, the first A motor; 26, a second motor; 27, an anti-solder dredging head assembly; 28, a sealing shell; 29, a guide channel; 30, a sealing ring; 31, a receiving groove; 32, an inner push sealing tube; 33, a reset spring; 34, a connecting pipe; 35, a guide groove; 36, a limiting ring; 37, a connecting pipe; 38, an opening and closing baffle; 39, a reset spring; 40, a limiting connecting rod; 41, a guide member; 42, a discharge pipe; 43, an opening and closing baffle; 44, a avoidance groove; 45, a card slot. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments.

[0021] Example 1: Figure 1 and Figure 2 As shown, a laser welding head with a rotary wire feeding function of the present embodiment includes a laser emitting end 4. After the laser emitted from the laser emitting end 4 contacts the material to be welded, it melts the irradiated position and realizes welding. The welding wire and the shielding gas required in the welding process are stored additionally on one side of the laser emitting end 4. A storage barrel 6 is provided on one side of the outside of the laser emitting end 4. A connecting frame 14 is provided in the middle of the storage barrel 6. Four storage columns 15 are evenly distributed around the outside of the connecting frame 14 and the inner wall of the storage barrel 6. Four types of welding auxiliary welding wires can be respectively wound around the outside of the storage column 15. The center position of one end of the storage column 15 is rotatably connected with the connecting frame 14. The outer wall of the connecting frame 14 is respectively provided with a second motor 26 facing 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. The storage column 15 can be rotated by the output of the second motor 26, and the rotation of the storage column 15 is responsible for the release and recovery of the externally wound welding wire. Among them, Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, an extension rod 16 is extended from one end of the connecting frame 14 toward the storage column 15, a limiting frame 17 is provided at one end of the extension rod 16, and third extrusion blocks 23 are provided on both sides of the limiting frame 17. A pair of third extrusion blocks 23 clamp one end of the welding wire wrapped around the outside of the storage column 15. When the welding wire inside the guide frame 5 is recovered, the welding wire is stored in the clamping position inside the limiting frame 17, and one end of the welding wire wrapped around the outside of the storage column 15 is clamped by the third extrusion block 23, which is convenient for releasing and discharging the welding wire, and convenient for the welding wire to be stably transmitted toward the inside of the guide frame 5 after being restricted by a pair of third extrusion blocks 23. like Figure 3 and Figure 4 As shown, in order to avoid the shielding gas failing to completely cover the welding position and causing a reduction in the welding effect, a fan 9 is provided on one side in the middle of the lower end of the storage barrel 6, and three gas storage tanks 10 are transversely provided at the rear end of the storage barrel 6, and the outside of the gas storage tank 10 is stuck on the outside of the storage barrel 6, and the lower ends of the three gas storage tanks 10 are sealed with electronic gas valves 11 for controlling the gas release, and the lower ends of the three electronic gas valves 11 and the gas inlet of the fan 9 are sealed and connected by a four-way pipe 12, and after one of the electronic gas valves 11 is opened, the fan 9 can extract and release the corresponding shielding gas from the four-way pipe 12; Among them, the air outlet of the fan 9 is sealed and 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 fan 9 will be directly transmitted to the storage barrel 6. The gas transmitted to the inside of the storage barrel 6 will flow into the guide frame 5 along with the welding wire through the transmission cavity 13. The protective gas will completely wrap the welding wire inside the guide frame 5 and finally be discharged from the extension block 19 together with the welding wire: In addition, if Figure 1 and Figure 2 As shown, a first motor 25 is disposed in the middle 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, the four storage columns 15 and the welding wire surrounding the outside; In order to ensure that the welding wire can be stably fed into the lower end of the laser emitting end 4 after being transmitted into the transmission cavity 13, a transmission cavity 13 is provided on the side of the storage barrel 6 facing the laser emitting end 4, and a guide frame 5 is provided at the lower end of the transmission cavity 13. The guide frame 5 is welded and fixed to the lower end of the storage barrel 6. Figure 3 and Figure 4 As shown, the guide frame 5 is located on one side of the laser emitting end 4, and an extension block 19 is provided at the lower end of the guide frame 5 extending toward the lower end of the laser emitting end 4, and the angle between the extension block 19 and the guide frame 5 is ninety degrees. After being guided by the guide frame 5, the welding wire will bend and approach the welding position during the transmission process toward the extension block 19; In order to stably transmit the welding wire in the guide frame 5, as shown in FIG. Figure 4 As shown, first extrusion blocks 21 are provided at both ends of the guide frame 5 and at both sides of the middle position. The welding wire transmitted to the transmission cavity 13 is clamped by three pairs of first extrusion blocks 21 and stably transmitted toward the extension block 19. like Figure 4 As shown, in addition, a second extrusion block 22 is provided at the position of the first extrusion block 21 on the lower end side of the extension block 19 toward the inside of the guide frame 5. When the welding wire transmitted through the guide frame 5 is transmitted to the inside of the extension block 19, the pair of first extrusion blocks 21 are clamped and transformed into a first extrusion block 21 and a second extrusion block 22 to clamp the welding wire. The transmission of the welding wire is completed by clamping, so that the welding wire can be stably discharged from the position of the extension block 19.

[0022] In order to prevent the welding wire from being bent between two adjacent pairs of first extrusion blocks 21 and causing the welding wire to be stuck inside the guide frame 5, first guide bars 18 are provided on both sides between the two adjacent pairs of first extrusion blocks 21, and the first guide bars 18 are welded and fixed to the guide frame 5. The front and rear ends of the first extrusion block 21 are connected to the inside of the guide frame 5 for rotation, and the front and rear ends of the second extrusion block 22 are connected to the inside of the extension block 19 for rotation. When the first extrusion block 21 and the second extrusion block 22 rotate, the friction generated during the transmission of the welding wire can be offset, thereby improving the welding effect. In order to understand the remaining amount of welding wire outside the storage column 15, Figure 4 As shown, an infrared rangefinder 24 is provided on one side of the upper end of the transmission cavity 13, and the infrared rangefinder 24 is aimed at one of the storage columns 15 close to the transmission cavity 13, and the distance of the welding wire wrapped 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 wrapped around the outside; 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 As shown, a display screen 8 is provided on one side of the outside of the storage barrel 6, and the display screen 8 can display the selected welding wire and shielding gas; In order to avoid the welding wire from colliding between the extension block 19 and the bending position of the guide frame 5, as shown in FIG. Figure 4 As shown, a second guide strip 20 in the shape of a quarter circle is provided between the extension block 19 and the guide frame 5; In addition, if Figure 8 and Fig. 9As shown, the anti-solder dredging head assembly 27 includes: a sealing shell 28, the sealing shell 28 is fixedly embedded in the extension block 19 and 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 opened 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 inner wall of the sealing shell 28 through the return spring 33, one end of a connecting pipe 34 is fixedly connected to the inner wall of the sealing shell 28, and the tail of the connecting pipe 34 is connected to the guide channel 29 through a 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 groove 35, The sealing shell 28 and the end of the inner push sealing tube 32 are both conical head structures. The inner wall of the inner push sealing tube 32 is rotatably provided with an opening and closing baffle 1 38, and a torsion spring is provided on the rotating shaft of the opening and closing baffle 1 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 2 39 is installed in the avoidance groove 44. The connecting pipe 2 37 is movably provided in the conical head of the inner push sealing tube 32, and the connecting pipe 2 37 is provided outside. 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 return spring 39 close to the guide member 41 is fixedly connected to the guide member 41, a discharge pipe 42 is fixedly embedded in the conical head structure of the sealing shell 28, and an opening and closing baffle 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 43, and a card slot 45 is opened on the inner wall of the conical head of the sealing shell 28.

[0023] 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.

[0024] 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.

[0025] 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; 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; 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 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.

[0026] The working principle and beneficial effects of the above scheme are as follows: Since welding accuracy directly affects the quality and stability of the welded joint, if multiple factors such as laser power, wire feeding speed, temperature, gas flow rate, etc. are out of control during the welding process, the strength of the welded joint may be reduced or even fail. The above two formulas can be used to quantify and optimize various parameters of the welding process.

[0027] in, Indicates the laser power output detected by the laser power density sensor. The intensity of the laser during welding determines the heating effect of the welding area. Too low power density may result in insufficient welding, while too high power may overheat the welding point and affect the strength of the joint.

[0028] The temperature of the welding zone detected by the temperature sensor. Too high or too low temperature during welding will affect the quality of the weld. If the temperature is uneven, it may cause the heat affected zone to be unstable, forming cracks or pores.

[0029] The wire feeding speed directly affects the size and shape of the weld. If the wire feeding speed is too fast, it may cause the molten pool to overflow; if it is too slow, it may cause inadequate welding.

[0030] The function of shielding gas is to isolate impurities in the air and prevent oxidation. Unstable or too low gas flow may lead to unsatisfactory shielding effect and affect welding quality.

[0031] The actual size of the welding surface. The welding surface shape is detected in real time by 3D vision sensors. If the actual welding surface is significantly different from the expected one, it may affect the strength and stability of the welding.

[0032] The reference welding surface size. Ideally, the welding surface should conform to the predetermined shape and size, and the 3D vision sensor is used to compare it with the actual surface to evaluate the welding accuracy.

[0033] is the actual gas flow rate. The gas flow rate is crucial to the stability of the protected welding area. If the gas flow rate is too high or too low, it may affect the protection effect and welding quality.

[0034] Therefore, in formula (1) It reflects the balance between laser power and welding temperature and wire feeding speed and gas flow rate. Too high or too low power and temperature ratio will affect welding quality. Describes the deviation of the weld surface morphology. If the actual surface morphology differs too much from the reference surface morphology, it may lead to a decrease in weld quality. Describes the impact of the shielding gas coverage and welding stability in the welding area. If the gas flow rate deviation is too large, it will affect the effectiveness of the shielding gas. In formula (II) It means that if the welding temperature deviation is large, it will lead to performance differences in the welded joint, affecting the strength and quality of the weld. It means that the wire feeding speed directly affects the size of the weld line, and too large deviation may lead to uneven welding. It means that the deviation of the welding surface shape affects the quality of the joint, and too large a deviation will lead to unstable welding strength.

[0035] 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 the two formulas, the two formulas not only increase the accuracy of the welding process, but also greatly improve the practicality and stability of the welding head.

[0036] 1. Real-time monitoring and feedback mechanism: By introducing sensor monitoring, various key parameters in the welding process can be monitored in real time. The formula calculation results will help the system understand the current status of each variable and make precise adjustments based on real-time data.

[0037] 2. Optimize welding quality: By optimizing control parameters (such as wire feeding speed, gas flow, laser power, etc.), each link of the welding process can be ensured to be in the best state. In this way, common problems in the welding process (such as too high or too low temperature, insufficient gas flow, unstable wire feeding, etc.) can be avoided, and the strength and stability of the welded joint can be effectively improved.

[0038] 3. Reduce manual intervention: Since the formula takes into account 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.

[0039] The above methods can comprehensively and accurately control all important parameters in the welding process. This precise control can not only improve the accuracy of welding, but also reduce errors and ensure that the welded joint has higher stability and strength. Through real-time monitoring and adjustment, a high degree of automation and optimization is achieved, which greatly improves the practicality of the welding head and also demonstrates the innovation of the technology.

[0040] Embodiment 3: In order to facilitate winding different welding wires around the corresponding storage column 15, a through hole is provided at the front end of the storage barrel 6. Figure 3 As shown, a sealing sheet 7 is provided at the front end of the storage barrel 6, and the sealing sheet 7 is sealed and connected to the through hole, and the sealing sheet 7 can be slid out to expose the internal storage column 15.

[0041] To further understand the content of the present invention, please refer to Fig.10 , this embodiment provides the following technical solutions: A laser welding head with a rotary wire feeding function also includes a welding system built into a display screen 8, the welding system includes an input module, an entry module, an identification module, an adjustment module, a welding wire depth detection module, a speed calculation module and a motor control module, wherein: the input module: is used for the user to input the two materials to be welded, and the information will be used as the basis for subsequent identification and matching, and a preliminary format check is performed on the input information to ensure the validity and accuracy of the input information, avoid the system from failing to operate normally due to incorrect input, and provide the entire system with basic data for determining welding materials, which is the basis for subsequent selection of different welding wires and different shielding gases; Input module: used to input the materials for subsequent welding of the laser welding head in advance, and to input a corresponding welding wire and shielding gas for each input material, to preliminarily organize and store the input information, to form a database, to mark different materials to be welded in advance, and to directly use the corresponding welding wire and shielding gas after inputting and identifying the corresponding materials to be welded in the input module, so as to avoid different users having to spend time selecting welding wire and shielding gas when using the laser welding head, and to avoid the reduction of welding effect due to the selection of wrong welding wire and shielding gas, and to ensure that the data is saved in a format that can be recognized and called by the system; Identification module: It is 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, identify the welding wire and shielding gas corresponding to each material, and accurately find the welding wire and shielding gas corresponding to the materials to be welded, so as to provide the correct data basis for subsequent adjustment and use, which is the key to ensure welding quality; Adjustment module: used for sending a start signal to start the first motor 25, the corresponding electronic gas valve 11 and the fan 9 for the corresponding welding wire and shielding gas determined by the identification module, so as to adjust the corresponding welding wire and shielding gas to the ready-to-use position. The welding wire and shielding gas are in a ready-to-use state, 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; Welding wire depth detection module: 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 a digital signal that can be recognized and processed by the system, accurately obtain the welding wire winding depth information, and provide an accurate basis for the subsequent adjustment of the rotation speed of the second motor 26, which is helpful to achieve accurate welding wire release and recovery control, and timely detect the changes in the welding wire winding state so that the system can make corresponding adjustments, thereby improving the stability and reliability of the entire welding process; 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. When releasing the welding wire, the value for gradually increasing the rotation speed is calculated according to the diameter change. When recovering the welding wire, the value for gradually reducing the rotation speed is calculated to achieve accurate calculation of the motor rotation speed, ensure that the welding wire can be released and recovered at the desired speed, and ensure the smooth progress of the welding process. Based on accurate calculation results, the utilization rate of the welding wire can be improved, the waste of welding wire can be reduced, and it also helps to improve the welding quality; Motor control module: 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, have basic control functions such as motor start, stop, forward and reverse rotation, and can accurately adjust the output speed of the second motor 26 according to different speed instructions. When recovering the welding wire and controlling the rotation of the output shaft of the second motor 26, the length of the recovered welding wire is determined according to the speed calculated by the speed calculation module and the start time of the second motor 26. Among them, the fixed length inside the guide 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 guide frame 5 and the extension block 19, the start of the second motor 26 is stopped, so that one end of the welding wire is retained in the limiting frame 17 and clamped by the third extrusion block 23, so as to realize effective control of the second motor 26, so that the second motor 26 runs at the calculated speed, thereby realizing the correct release and recovery of the welding wire. Accurate control of the second motor 26 helps to improve the automation of the entire welding system, reduce manual intervention, and improve work efficiency.

[0042] Working principle: When using the laser welding head to weld the welding position, the laser emitting end 4 is aligned with the welding position from top to bottom, and 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 adjust, align 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, and the output of the second motor 26 can drive the storage column 15 to rotate. The rotation of the storage column 15 will discharge the wound welding wire, and the welding wire passes through the limiting frame 17 and is clamped by the third extrusion block 23 and then transmitted toward the transmission cavity 13. The wire flows from the transmission chamber 13 into the guide frame 5. The material flowing into the guide frame 5 is clamped between the first extrusion block 21 and the second extrusion block 22 and guided by the first guide bar 18 and the second guide bar 20, and then discharged from the extension block 19 and directly discharged to the lower end of the laser emitting 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 protective gas is opened. After the electronic gas valve 11 is opened, 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 finally the protective gas is discharged together with the welding wire discharge position.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the 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 arranged on one side outside the laser emitting end (4), a fan (9) is arranged on one side in the middle of the lower end of the storage bucket (6), three gas storage tanks (10) are arranged transversely at the rear end of the storage bucket (6), and electronic gas valves (11) are sealed at the lower ends of the three gas storage tanks (10), the lower ends of the three electronic gas valves (11) and the air inlet of the fan (9) are sealedly connected via a four-way pipe (12), and the air outlet of the fan (9) is sealedly connected to the middle position of the lower end of the storage bucket (6).

2. The laser welding head with rotary wire feeding function according to claim 1, characterized in that: A connecting frame (14) is arranged in the middle of the storage barrel (6), and 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 position of the storage column (15) is rotatably connected to the connecting frame (14), and the outer wall of the connecting frame (14) is respectively provided with a second motor (26) facing 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).

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: A first motor (25) is disposed at a middle position on the upper end of the storage barrel (6), and an 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: A transmission cavity (13) is provided on a side of the storage barrel (6) facing the laser emitting end (4), a guide frame (5) is provided at the lower end of the transmission cavity (13) and is welded and fixed to the storage barrel (6), an extension block (19) is provided at the lower end of the guide frame (5) and extends toward the lower end of the laser emitting end (4), and a solder-proof 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: An infrared rangefinder (24) is provided on one side of the upper end of the transmission cavity (13), and the infrared rangefinder (24) is aimed at 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).

10. The laser welding head with rotary wire feeding function according to claim 7, characterized in that: It also includes a display screen (8) located on one side of the outside of the storage barrel (6), wherein the display screen (8) has a built-in welding system, and the welding system includes: Input module: used to input the two types of materials to be welded, as the basis for subsequent identification and matching, and to perform 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 is used to send a start signal to start the first motor (25), the corresponding electronic gas valve (11) and the fan (9) for the corresponding welding wire and shielding gas determined by the identification module, so as to adjust the corresponding welding wire and shielding gas to a position to be used; A 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, convert the detected winding depth data into a digital signal that can be recognized and processed by the system, accurately obtain the welding wire winding depth information, and provide an accurate basis for the 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. When releasing the welding wire, the value for gradually increasing the rotation speed is calculated according to the diameter change. When recovering the welding wire, the value for gradually reducing the rotation speed is calculated, so as to realize the accurate calculation of the motor rotation speed; 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.

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