Handheld laser welding gun with adjustable focal length

Abstract

The invention provides a focal length adjustable handheld laser welding gun, and belongs to the technical field of welding guns, the focal length adjustable handheld laser welding gun comprises a gun body and a main body cover, the main body cover and the gun body are connected to form a main body cavity, a focusing assembly is arranged in the main body cavity, the focusing assembly comprises a focusing tube, the two ends of the focusing tube are provided with light transmitting mirrors to form a focusing cavity, and a focusing mirror is located in the focusing cavity; the electric air pump on one side of the gun body is communicated with the breather pipe so as to be communicated with the focusing cavity; a light emitting cylinder is arranged at the other end, corresponding to the focusing tube, of the gun body; a connector and a control module are arranged in the gun body, a control panel and a power module are arranged on the gun body, and the power module is connected with an external power source through a wire. According to the welding gun, the focusing assembly is arranged in the main body cavity, the focusing mirror is located in the focusing pipe in the focusing assembly, the focusing pipe is inflated through the electric air pump, the effect of pushing the focusing mirror to move is achieved, therefore, the focusing function is achieved, and the focal length can be flexibly adjusted according to the thickness of a welding material and the use requirement.

Description

Technical Field

[0001] The invention belongs to the technical field of welding guns, and more specifically, particularly relates to a handheld laser welding gun with adjustable focal length. Background Art

[0002] In modern industrial manufacturing, welding technology is used to connect metal parts and complex structures to ensure the integrity and reliability of products. In the welding process, welding equipment is often used. Through welding equipment, different metal parts can be firmly connected together to achieve material fusion and forming. Welding parameters can be controlled to ensure the stability and reliability of weld quality. Handheld laser welding gun is one of the welding equipment.

[0003] Handheld laser welding guns can focus a high-energy-density laser beam on the welding point. They are flexible and convenient to operate, can adapt to complex welding environments and workpieces of various shapes, and improve welding efficiency and quality. In the welding process, welding materials of different thicknesses are often encountered, and welding materials of different thicknesses require different welding forces. However, traditional handheld laser welding guns usually have a fixed focal length, and cannot adjust the focal length according to the thickness of the welding material and usage requirements. As a result, when welding thin plates, the energy density of the light spot may be too high due to the inability to change the focal length, and the thin plate may be melted through in an instant, resulting in waste. When welding thick plates, the energy may not be effectively concentrated at the deep welding point, resulting in quality problems such as loose welding, pores or cracks, which seriously affect the welding quality and work efficiency, and increase production costs and waste of resources. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a handheld laser welding gun with adjustable focal length to solve the technical problems in the prior art that the traditional handheld laser welding gun cannot adjust the focal length according to the thickness of the welding material and the usage requirements, which easily leads to the melting through of the welding material or the loose welding, reduces the welding quality and work efficiency, and increases the production cost and wastes resources.

[0005] The purpose and effect of the handheld laser welding gun with adjustable focal length of the present invention are achieved by the following specific technical means: A handheld laser welding gun with adjustable focal length comprises a gun body and a main body cover, wherein the main body cover is located above the gun body and is detachably connected to the gun body to form a main body cavity, a focusing assembly is arranged in the main body cavity, the focusing assembly comprises a focusing tube, both ends of the focusing tube are provided with light-transmitting mirrors to form a focusing cavity, and a focusing mirror is arranged in the focusing cavity; an electric air pump is arranged on one side of the gun body, a vent pipe is arranged on one side of the focusing tube, the electric air pump is connected to the vent pipe through a connecting pipe, and the electric air pump is connected to the focusing cavity; a source assembly is arranged in the main body cavity, the source assembly is located at one end of the focusing tube, a light emitting tube is provided at the other end of the gun body corresponding to the focusing tube, and the main body cavity is connected to the outside world through the light emitting tube; a connector and a control module are arranged in the gun body, a control panel and a power module are arranged on the gun body, and the power module is connected to an external power supply through a wire.

[0006] According to a preferred embodiment, a focusing lens frame is provided in the focusing cavity, the focusing lens is clamped on the focusing lens frame, two groups of focusing rods are provided in the focusing tube, the two groups of focusing rods are symmetrically distributed, the focusing lens frame is provided with through holes corresponding to the focusing rods, the focusing rods are inserted into the through holes, and the focusing lens frame and the focusing rods are slidably connected; a rubber ring is provided in the focusing cavity, the rubber ring is sleeved on the focusing lens frame and contacts with the inner wall of the focusing tube; two groups of springs are provided between the focusing lens frame and the focusing tube, the springs are sleeved on the focusing rods.

[0007] According to a preferred embodiment, the focusing assembly also includes a first pressure sensor, a connecting sleeve is provided on the focusing tube, the connecting sleeve is connected to the focusing tube, a tympanic membrane is provided at the bottom of the connecting sleeve, the first pressure sensor is located below the tympanic membrane and is installed on the focusing tube, and the top of the first pressure sensor is in contact with the tympanic membrane; the ventilation tube is located between the focusing lens frame and one group of the light-transmitting lenses, ventilation grooves are opened on both sides of the focusing tube, and the ventilation grooves are located between the focusing lens frame and another group of the light-transmitting lenses.

[0008] According to a preferred embodiment, the source component includes a reflector, the reflector is located in the main body cavity, the focusing component is located between the reflector and the light output tube, the reflector is clamped in the reflector frame, two groups of connecting frames are obliquely arranged in the main body cover, the reflector frame is clamped between the two groups of connecting frames and connected by screws, the reflector is inclined, and the inclination angle of the reflector is the same as that of the connecting frame; a magnet is arranged between the two groups of connecting frames, the magnet is installed on the main body cover, a metal plate is arranged on the top of the reflector frame, and the metal plate is in contact with the magnet.

[0009] According to a preferred embodiment, the source component also includes a mounting seat and a laser, a connecting port is provided on one side of the main body cover, and the mounting seat is sleeved on the connecting port; the laser is located at one end of the mounting seat, and L-shaped connecting blocks are provided on both sides of the laser, and two groups of connecting slots are provided on the mounting seat, and one end of the L-shaped connecting block is clamped in the connecting slot; mounting plates are provided on both sides of the mounting seat, and one end of the mounting plate is connected to the mounting seat and the connecting port by mounting screws, and a mounting slot is provided on the laser, and the other end of the mounting plate is clamped in the mounting slot, and the laser is detachably connected to the mounting seat.

[0010] According to a preferred embodiment, a collimator frame is arranged between the mounting seat and the connecting port, a plurality of positioning blocks are arranged on the collimator frame, the mounting seat is provided with positioning holes corresponding to the positioning blocks, the positioning blocks are clamped in the positioning holes, and a collimator is installed in the collimator frame; the laser, the collimator and the reflector are arranged in a straight line in sequence, and the collimator is located between the laser and the reflector.

[0011] According to a preferred embodiment, a cold air cavity is provided at one end of the main body cover, a heat sink is provided at one end of the main body cover, the heat sink is clamped in the cold air cavity, a fan is installed at one end of the heat sink, a plurality of ventilation holes are provided in the heat sink, and the ventilation holes are conical; two groups of air outlet pipes that pass through the cold air cavity are provided on one side of the main body cover, one group of the air outlet pipes is connected to the main body cavity through an air guide pipe, a copper conduit is wrapped around the focusing tube, one end of the copper conduit is passed through the outside of the main body cavity and is connected to one group of the air outlet pipes through the air guide pipe, and the other end of the copper conduit is located in the main body cavity; a plurality of heat dissipation grooves are provided on one side of the main body cover, and a temperature sensor is provided in the main body cavity.

[0012] According to a preferred embodiment, a cold air cavity is opened at one end of the main body cover, and a heat sink is arranged at one end of the main body cover, and the heat sink is clamped in the cold air cavity, a fan is installed at one end of the heat sink, and a dustproof net is installed on one side of the fan, and a plurality of ventilation holes are opened in the heat sink, and the ventilation holes are conical; two groups of air outlet pipes communicating with the cold air cavity are arranged on one side of the main body cover, and one group of the air outlet pipes is connected with the main body cavity through an air guide pipe, a copper conduit is wound around the focusing tube, one end of the copper conduit is passed through the outside of the main body cavity and is connected with one group of the air outlet pipes through the air guide pipe, and the other end of the copper conduit is located in the main body cavity; a plurality of heat dissipation pipes are arranged on one side of the main body cover, and the main body cavity is communicated with the outside through the heat dissipation pipes, a dustproof cover is sleeved on one end of the heat dissipation pipe, and a temperature sensor is arranged in the main body cavity.

[0013] According to a preferred embodiment, an installation cavity is opened in the handle of the gun body, an installation box is arranged under the gun body, the installation box is mounted in the installation cavity and is detachably connected to the gun body by screws, the control module is installed in the installation box, and the connector is located in the installation cavity; a slot is opened on the gun body, a second pressure sensor is installed on the connector, the second pressure sensor is located on one side of the slot, an operating block is rotatably arranged on the gun body, and the operating block can pass through the slot to contact the second pressure sensor.

[0014] According to a preferred embodiment, a fixing seat is arranged under the gun body, a fixing base is arranged at the bottom of the gun body, the fixing base is clamped on the fixing seat, a strong magnet is arranged on the fixing seat, the strong magnet is in contact with the fixing base, and a plurality of counterweight blocks and suction cups are arranged at the bottom of the fixing seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The gun body is connected to the main body cover to form a main body cavity, in which a focusing assembly is arranged. The welding gun realizes the welding operation on the welding material through the cooperation of a laser, a collimator, a reflector and a focusing lens; the focusing lens is installed in a focusing tube in the focusing assembly, and is slidably connected to a focusing rod in the focusing tube by being installed on the focusing lens frame, so that the focusing lens can be moved in the focusing tube; an electric air pump is arranged on one side of the gun body, through which the focusing tube can be inflated, and the focusing lens can be pushed by air pressure, so as to change the position of the focusing lens, and the focal length can be flexibly adjusted according to the thickness of the welding material and the use requirements; when welding thinner materials, the focal length can be adjusted to make the energy distribution of the light spot suitable to avoid melting through; for thick materials, the focal length can be increased to ensure deep fusion, reduce the problem of loose welding, significantly improve the welding quality, and reduce weld defects.

[0016] 2. The cold air cavity opened at one end of the main cover, the fan installed at one end of the heat sink, and the multiple sets of conical ventilation holes in the heat sink work together to form an efficient heat dissipation channel. When the fan rotates, the air will enter the cold air cavity through the ventilation holes. The ventilation holes are conical and adopt the principle of large and small holes to cool the incoming air; two sets of air outlet pipes are set on one side of the gun body, one of which is directly connected to the main cavity through the air guide pipe, thereby effectively reducing the temperature in the main cavity and ensuring that the internal components work stably under a suitable temperature environment. The other set of air outlet pipes is connected to the copper conduit on the focusing tube through the air guide pipe, so that the air in the cold air cavity can smoothly enter the main cavity and the copper conduit. The cold air circulates along the copper conduit, which can quickly take away the heat generated by the focusing tube during operation, ensuring that the performance of the focusing tube and its related optical components is not affected by high temperature, and further improving the working stability and welding quality of the entire handheld laser welding gun.

[0017] 3. The handle of the gun body is provided with an installation cavity, which provides convenience for the subsequent installation of components. The installation box is installed in the installation cavity, realizing the detachable connection between the installation box and the gun body; the control module is installed in the installation cavity. When the control module needs to be maintained, upgraded or replaced, it can be easily installed and disassembled, which improves the efficiency of equipment maintenance. At the same time, this layout keeps the control module away from the focusing cavity, avoiding the influence of factors such as heat generated during welding in the focusing cavity and possible electromagnetic interference on the control module, ensuring the stable operation of the control module, thereby ensuring the reliable operation of the entire handheld laser welding gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention after assembly; Figure 2 It is a schematic diagram of the structure after the disassembly of the first embodiment of the present invention; Figure 3 is a schematic diagram of the structure after the splitting of the second embodiment of the present invention; Figure 4 It is a schematic diagram of the structure after the focusing component is disassembled; Figure 5 is a cross-sectional view of the focusing tube; Figure 6 yes Figure 2 A partial enlarged view of area a in the middle; Figure 7 yes Figure 2 A partial enlarged view of area b; Figure 8 It is a schematic diagram of the structure of the power module; Fig. 9 It is a structural schematic diagram of the main body cover; Fig.10 It is a bottom view of the main body cover; Fig.11 is a cross-sectional view of a heat sink; Fig.12 This is the principle block diagram of the connector; Fig.13 This is the principle block diagram of the focusing component; Fig.14 This is the principle block diagram of the fan; Fig.15 This is the principle block diagram of the laser; Fig.16 It is the path diagram of the laser beam emitted by the laser.

[0019] In the figure, the corresponding relationship between the component names and the figure numbers is as follows: 11. Gun body; 12. Electric air pump; 13. Light tube; 14. Mounting box; 15. Slot; 16. Second pressure sensor; 17. Operation block; 18. Fixed card seat; 21. Main body cover; 22. Connecting frame; 23. Magnet; 24. Connecting port; 25. Heat sink; 301. Focusing tube; 302. Transparent mirror; 303. Focusing mirror; 304. Ventilation tube; 305. Focusing mirror frame; 306. Focusing rod; 307. Rubber ring; 308. Spring; 309. First pressure sensor; 310. Connecting sleeve; 311. Tympanic membrane; 312. Ventilation groove; 313. Copper conduit; 41. Connector; 42. Control control module; 43, control panel; 44, power module; 45, fixing seat; 46, strong magnet; 47, counterweight; 48, suction cup; 501, reflector; 502, reflector frame; 503, metal plate; 504, mounting seat; 505, laser; 506, L-shaped connecting block; 507, connecting slot; 508, mounting plate; 509, mounting slot; 510, collimator frame; 511, positioning block; 512, positioning hole; 513, collimator; 61, heat sink; 62, fan; 63, ventilation hole; 64, air outlet pipe; 65, temperature sensor; 66, dust net; 67, heat pipe; 68, dust cover. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present invention, but cannot be used to limit the scope of protection of the present invention.

[0021] Embodiment 1: Figures 1 to 16As shown, the present invention provides a handheld laser welding gun with adjustable focal length, including a gun body 11 and a main body cover 21, the main body cover 21 is located above the gun body 11, the two are detachably connected, and a main body cavity is formed; a focusing assembly is arranged in the main body cavity, the focusing assembly includes a focusing tube 301, both ends of the focusing tube 301 are provided with light-transmitting mirrors 302, and the two light-transmitting mirrors 302 and the focusing tube 301 together form a focusing cavity; a focusing mirror 303 is located in the focusing cavity, and the focusing mirror 303 plays a key role in focusing the laser beam in the entire welding operation, and the accuracy of its position directly affects the welding effect. An electric air pump 12 is arranged on one side of the gun body 11, and a vent pipe 304 is arranged on one side of the focusing tube 301. The electric air pump 12 is connected to the vent pipe 304 through a connecting pipe, so that the electric air pump 12 is connected to the focusing cavity, and the electric air pump 12 can provide a stable air pressure for the focusing cavity, thereby realizing the movement of the focusing mirror 303. A source component is also provided in the main body cavity, which is located at one end of the focusing tube 301. The source component is the source of the laser beam, and its performance and working state determine the quality of the laser beam. The gun body 11 is provided with a light emitting tube 13 at the other end corresponding to the focusing tube 301, so that the main body cavity is connected to the outside through the light emitting tube 13, and the laser beam can be accurately irradiated onto the welding material from the main body cavity through the light emitting tube 13. A connector 41 and a control module 42 are also provided inside the gun body 11. The connector 41 is the total unit for connecting the components of the entire welding gun. A plurality of groups of connection sockets are provided on the gun body 11, and these connection sockets are connected to the connector 41 through wires to realize electrical connection between multiple components. At the same time, the control module 42 itself is provided with a connecting wire, which is directly electrically connected to the connector 41, so as to realize the control of other components. The control module 42 can adopt the STM32F103C8T6 control module. The gun body 11 is also provided with a control panel 43 for the convenience of the operator and a power module 44 for providing energy to the equipment. Both are electrically connected to the connector 41. The power module 44 is connected to the external power supply through a wire to ensure that the equipment has a stable power supply during operation. The control panel 43 can adopt the Delta DOP-107BV control panel.

[0022] like Figure 2 , Figure 4 , Figure 5As shown, a focusing lens frame 305 is provided in the focusing cavity, and the focusing lens 303 is clamped on the focusing lens frame 305, laying the foundation for the subsequent focusing function. Two groups of focusing rods 306 are provided in the focusing tube 301, and the two groups of focusing rods 306 are symmetrically distributed, which can ensure that the force is evenly applied during the adjustment process, so that the movement of the focusing lens 303 is more stable. A through hole is provided on the focusing lens frame 305 at a position corresponding to the focusing rod 306, and the focusing rod 306 is just inserted into the through hole, so that a slidable connection is formed between the focusing lens frame 305 and the focusing rod 306. When the focal length needs to be adjusted, this sliding connection method allows the focusing lens 303 to move smoothly under the guidance of the focusing rod 306 to achieve a change in the focal length. At the same time, a limit block is provided at one end of the focusing rod 306, which can effectively prevent the focusing lens 303 from leaving the moving range of the focusing rod 306. A rubber ring 307 is also provided in the focusing chamber. The rubber ring 307 is sleeved on the focusing lens frame 305 and contacts the inner wall of the focusing tube 301, playing the role of sealing the space. The electric air pump 12 is inflated to effectively push the focusing lens 303 to move. Two sets of springs 308 are also provided between the focusing lens frame 305 and the focusing tube 301. The springs 308 are sleeved on the focusing rod 306. The springs 308 provide elastic support for the focusing lens frame 305. When the focusing lens 303 moves during the focusing process, the springs 308 can help it return to a suitable position after the air pressure changes or other external forces disappear, and also help to maintain the balance of the entire system.

[0023] The focusing assembly also includes a first pressure sensor 309. A connecting sleeve 310 is provided on the focusing tube 301. The connecting sleeve 310 is connected to the focusing tube 301. A tympanic membrane 311 is provided at the bottom of the connecting sleeve 310. The first pressure sensor 309 is located below the tympanic membrane 311 and is installed on the focusing tube 301. The top of the first pressure sensor 309 is in contact with the tympanic membrane 311. When the air pressure in the focusing chamber changes, the tympanic membrane 311 will be subjected to pressure and transmit the pressure to the first pressure sensor 309. The first pressure sensor 309 can convert the pressure signal into an electrical signal, thereby providing the operator with information about the pressure situation in the focusing chamber so as to control the focal length. The first pressure sensor 309 can adopt the PX2600 pressure sensor of the HONEYWELL - PX2 series. The vent pipe 304 is located between the focusing lens frame 305 and one of the light-transmitting lenses 302. It is an important channel for adjusting the air pressure in the focusing cavity. When the electric air pump 12 inflates the focusing tube 301, the air pressure between the focusing lens 303 and the light-transmitting lens 302 changes, and the focusing lens 303 moves relative to the other light-transmitting lens 302, thereby achieving the focusing effect. In addition, vent grooves 312 are provided on both sides of the focusing tube 301. The vent grooves 312 are located between the focusing lens frame 305 and the other light-transmitting lens 302. The vent grooves 312 cooperate with the vent pipe 304 to make the air pressure in the focusing cavity more evenly distributed, ensuring that the focusing lens 303 is adjusted in position under a stable air pressure environment, further improving the accuracy and stability of focal length adjustment.

[0024] like Figure 2 , Figure 6 , Figure 7 , Fig.10 , Fig.16 As shown, the source assembly includes a reflector 501, which is located in the main body cavity, and the focusing assembly is located between the reflector 501 and the light-emitting tube 13, so that the laser can be accurately adjusted by the focusing assembly after being reflected by the reflector 501, and finally emitted from the light-emitting tube 13 for welding. The reflector 501 is clamped in the reflector frame 502, and two groups of connecting frames 22 are tilted in the main body cover 21. The reflector frame 502 is just clamped between the two groups of connecting frames 22 and connected by screws, which ensures the stability of the reflector 501 during operation and prevents it from displacement. The reflector 501 is tilted, and its tilt angle is the same as that of the connecting frame 22, which can ensure that the laser is reflected at a specified angle. In addition, a magnet 23 is arranged between the two groups of connecting frames 22, and the magnet 23 is installed on the main body cover 21. A metal plate 503 is arranged on the top of the reflector frame 502. The metal plate 503 is in contact with the magnet 23, which not only further enhances the stability of the reflector 501, but also can play a pre-installation effect when installing the reflector frame 502, thereby improving the convenience of installation.

[0025] The source assembly also includes a mounting seat 504 and a laser 505. A connection port 24 is specially provided on one side of the main body cover 21. The mounting seat 504 is sleeved on the connection port 24. The cooperation between the two provides a stable foundation for the installation of subsequent components. The laser 505 is located at one end of the mounting seat 504. L-shaped connecting blocks 506 are provided on both sides of the laser 505. Correspondingly, two groups of connecting slots 507 are provided on the mounting seat 504. One end of the L-shaped connecting block 506 is clamped in the connecting slot 507, which not only ensures the firmness of the connection between the laser 505 and the mounting seat 504, but also provides convenience for the disassembly of the laser 505, which is convenient for equipment maintenance and replacement of lasers 505 of different powers or types. The laser 505 generates a laser beam for welding. The laser 505 can use a Laser Quantum femtosecond laser. Mounting plates 508 are provided on both sides of the mounting seat 504, and one end of the mounting plate 508 is connected to the mounting seat 504 and the connection port 24 by means of mounting screws. This connection method further enhances the stability of the mounting seat 504 on the main body cover 21. The laser 505 is provided with a mounting slot 509, and the other end of the mounting plate 508 is clamped in the mounting slot 509. The laser 505 and the mounting seat 504 are detachably connected, so that the laser 505 can be conveniently and quickly removed from or installed on the welding gun when it needs to be repaired, replaced or upgraded.

[0026] A collimator frame 510 is arranged between the mounting seat 504 and the connecting port 24, and a plurality of positioning blocks 511 are arranged on the collimator frame 510. Meanwhile, the mounting seat 504 is provided with positioning holes 512 corresponding to the positioning blocks 511, and the positioning blocks 511 are clamped in the positioning holes 512. This positioning method ensures the position accuracy of the collimator frame 510 between the mounting seat 504 and the connecting port 24. A collimator 513 is installed in the collimator frame 510. The laser 505, the collimator 513 and the reflector 501 are arranged in a straight line. The collimator 513 is located between the laser 505 and the reflector 501. The laser generated by the laser 505 first passes through the collimator 513. The collimator 513 collimates the divergent laser beam emitted by the laser 505 and converts it into parallel light. The parallel light is then emitted to the reflector 501. After being reflected by the reflector 501, the laser continues to be transmitted and is finally used for welding through the focusing assembly and the light emitting tube 13. The precise position and mutual coordination of each component have a key influence on the welding quality. A mounting bracket is rotatably provided on the main body cover 21, and a protective goggles is clamped inside the mounting bracket. A sight mark is provided on the protective goggles. Through the protective goggles, human eyes can directly see the laser welding point during the welding process; during the laser welding process, the user can use the protective goggles to protect the eyes from laser damage while accurately aiming the welding gun at the welding point according to the sight mark to ensure the accuracy of the welding operation.

[0027] like Figure 2 , Figure 4 , Fig. 9 , Fig.11 , Fig.14 As shown, a cold air cavity is provided at one end of the main body cover 21, and the cold air cavity is separated from the main body cavity. A heat sink 61 is also provided at one end of the main body cover 21, and the heat sink 61 is stuck in the cold air cavity to form a stable heat dissipation structure. A fan 62 is installed at one end of the heat sink 61. The fan 62 is used as a power source. After starting, it can drive the air flow to create favorable conditions for heat dissipation. The fan 62 is electrically connected to the connector 41, so as to realize the power supply and control of the fan 62. There are multiple groups of ventilation holes 63 in the heat sink 61. These ventilation holes 63 are uniquely conical, and the principle of large and small holes cooling is adopted to realize the cooling of the incoming air. Two groups of air outlet pipes 64 are provided on one side of the main body cover 21, which are connected with the cold air cavity. One group of air outlet pipes 64 is connected to the main body cavity through an air guide pipe. The cold air in the cold air cavity can enter the main body cavity through the air outlet pipe 64 and the air guide pipe, effectively reducing the temperature in the main body cavity. In addition, a copper conduit 313 is wound around the focusing tube 301. One end of the copper conduit 313 is passed through the outside of the main body cavity and connected to one of the air outlet pipes 64 through the air guide pipe, and the other end is located in the main body cavity. Through this design, cold air can circulate along the copper conduit 313, quickly taking away the heat generated by the focusing tube 301 during operation, ensuring that the focusing tube 301 and its related optical components work in a suitable temperature environment. At the same time, a plurality of heat dissipation slots 25 are also provided on one side of the main body cover 21, so that the air in the main body cavity is discharged to the outside world; the temperature sensor 65 provided in the main body cavity can monitor the temperature in the cavity in real time, providing a basis for the regulation of the heat dissipation system. The temperature sensor 65 can adopt a GX18B20 digital temperature sensor.

[0028] An installation cavity is provided in the handle of the gun body 11, which facilitates the placement of internal components. A heat insulation layer is provided between the installation cavity and the main body cavity, so that the heat in the main body cavity will not directly enter the installation cavity and affect the control module 42 and the connector 41 in the installation cavity. An installation box 14 is provided below the gun body 11. The installation box 14 is stuck in the installation cavity. The two are detachably connected by screws, which facilitates the installation, disassembly and maintenance of the installation box 14. The control module 42 is installed in the installation box 14, which is the core control part of the entire welding gun, and the connector 41 is located in the installation cavity. The connector 41 plays a key role in signal transmission and the overall coordinated work of the equipment. The convenient installation of the installation box 14 also makes it easy to install and disassemble the control module 42. A slot 15 is provided on the gun body 11, and a second pressure sensor 16 is installed on the connector 41. The second pressure sensor 16 is located on one side of the slot 15. like Figure 2 , Fig.15As shown, an operating block 17 is rotatably provided on the gun body 11. When the operating block 17 rotates, it can pass through the slot 15 and contact the second pressure sensor 16. The operator can apply pressure to the second pressure sensor 16 through the operating block 17 to start the welding gun. At this time, the laser 505 is started and the welding operation is performed. The second pressure sensor 16 can adopt the HX711 pressure sensor.

[0029] A fixing seat 45 is also provided below the gun body 11. The fixing seat 18 at the bottom of the gun body 11 is clamped on the fixing seat 45. A strong magnet 46 is provided on the fixing seat 45. The strong magnet 46 contacts the fixing seat 18, further enhancing the stability of the connection between the gun body 11 and the fixing seat 45. In addition, multiple sets of counterweights 47 and suction cups 48 are provided at the bottom of the fixing seat 45. The counterweights 47 can make the welding gun more stable when placed to avoid tipping over due to unstable center of gravity, and the suction cups 48 can firmly adsorb the welding gun on a plane such as a workbench; when the welding gun is not in use, the welding gun can be placed on the fixing seat 45 through the cooperation of the fixing seat 45, the fixing seat 18 and the strong magnet 46, to avoid accidental falling when the welding gun is placed, resulting in damage to the welding gun.

[0030] Embodiment 2: Based on the handheld laser welding gun with adjustable focal length provided in Embodiment 1 of the present application, Embodiment 2 of the present application proposes a handheld laser welding gun with adjustable focal length. Embodiment 2 is only a preferred embodiment of Embodiment 1, and the implementation of Embodiment 2 will not affect the independent implementation of Embodiment 1. Embodiment 2 of the present invention will be further described below.

[0031] like Figure 3As shown, a cold air cavity is provided at one end of the main body cover 21, and the cold air cavity is separated from the main body cavity. A heat sink 61 is also provided at one end of the main body cover 21, and the heat sink 61 is stuck in the cold air cavity to form a stable heat dissipation structure. A fan 62 is installed at one end of the heat sink 61. The fan 62 is used as a power source. After starting, it can drive the air flow to create favorable conditions for heat dissipation. The fan 62 is electrically connected to the connector 41, so as to realize the power supply and control of the fan 62; in order to prevent dust from entering and affecting the normal operation of the heat dissipation system and internal components, a dustproof net 66 is installed on one side of the fan 62, which can effectively block external dust and ensure that the air is clean when entering the heat dissipation system. There are multiple groups of ventilation holes 63 in the heat sink 61. These ventilation holes 63 are in a unique cone shape, and the principle of cooling the large and small holes is adopted to achieve cooling of the incoming air. Two groups of air outlet pipes 64 are provided on one side of the main body cover 21, which are connected to the cold air cavity. One group of air outlet pipes 64 is connected to the main body cavity through the air guide pipe. The cold air in the cold air cavity can enter the main body cavity through the air outlet pipe 64 and the air guide pipe, effectively reducing the temperature in the main body cavity. In addition, a copper conduit 313 is wound around the focusing tube 301, one end of the copper conduit 313 is passed outside the main body cavity, and is connected to one group of air outlet pipes 64 through the air guide pipe, and the other end is located in the main body cavity. The cold air can circulate along the copper conduit 313, quickly taking away the heat generated by the focusing tube 301 during operation, and ensuring that the focusing tube 301 and its related optical components work in a suitable temperature environment.

[0032] At the same time, multiple groups of heat dissipation pipes 67 are arranged on one side of the main body cover 21. The main body cavity is connected with the outside world through the heat dissipation pipes 67, so that the air in the main body cavity is discharged to the outside world. In order to prevent dust from entering the main body cavity from the heat dissipation pipes 67, a dust cover 68 is provided on one end of the heat dissipation pipes 67; the temperature sensor 65 arranged in the main body cavity can monitor the temperature in the cavity in real time, providing a basis for the regulation of the heat dissipation system.

[0033] The difference between the second embodiment and the first embodiment is that a dustproof net 66 is provided on the side of the air inlet of the fan 62. In the actual use environment, the air is often mixed with a lot of dust; when the fan 62 rotates and the air is sucked in, the dustproof net 66 can effectively block the external dust and prevent the dust from entering the cold air chamber with the air. This can prevent dust from accumulating in the cold air chamber, thereby preventing the heat dissipation effect of the heat sink 61 from being affected by excessive dust, and also reducing the possibility of dust causing damage to other internal components; at the same time, multiple groups of heat dissipation pipes 67 are provided on the main body cover 21, which is different from the heat dissipation slot 25 of the first embodiment. The heat dissipation pipe 67 can be provided with a dustproof cover 68 at one end. By equipping the heat dissipation pipe 67 with a dustproof cover 68, it can effectively prevent external impurities from directly entering the main body cavity through the heat dissipation pipe 67, thereby preventing impurities from having adverse effects on the focusing assembly, ensuring the normal operation of the focusing assembly, and maintaining the stable performance of the entire handheld laser welding gun. The remaining conditions are consistent with the first embodiment, so this embodiment will not be repeated.

[0034] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments.

Claims

1. A handheld laser welding gun with adjustable focal length, comprising a gun body (11) and a main body cover (21), characterized in that: The main body cover (21) is located above the gun body (11) and is detachably connected to the gun body (11) to form a main body cavity. A focusing assembly is arranged in the main body cavity. The focusing assembly comprises a focusing tube (301). Both ends of the focusing tube (301) are provided with light-transmitting mirrors (302) to form a focusing cavity. A focusing mirror (303) is located in the focusing cavity. An electric air pump (12) is arranged on one side of the gun body (11). A ventilation pipe (304) is arranged on one side of the focusing tube (301). The electric air pump (12) is connected to the ventilation pipe (304) via a connecting pipe. ) is connected, the electric air pump (12) is connected to the focusing cavity; a source component is arranged in the main body cavity, the source component is located at one end of the focusing tube (301), the gun body (11) is provided with a light emitting tube (13) at the other end corresponding to the focusing tube (301), and the main body cavity is connected to the outside world through the light emitting tube (13); a connector (41) and a control module (42) are arranged in the gun body (11), and a control panel (43) and a power module (44) are arranged on the gun body (11), and the power module (44) is connected to an external power source through a wire.

2. The handheld laser welding gun with adjustable focal length according to claim 1, characterized in that: A focusing lens frame (305) is arranged in the focusing cavity, the focusing lens (303) is clamped on the focusing lens frame (305), two groups of focusing rods (306) are arranged in the focusing tube (301), the two groups of focusing rods (306) are symmetrically distributed, the focusing lens frame (305) is provided with through holes corresponding to the focusing rods (306), the focusing rods (306) are inserted into the through holes, and the focusing lens frame (305) and the focusing rods (306) are slidably connected; a rubber ring (307) is arranged in the focusing cavity, the rubber ring (307) is sleeved on the focusing lens frame (305) and contacts the inner wall of the focusing tube (301); two groups of springs (308) are arranged between the focusing lens frame (305) and the focusing tube (301), the springs (308) are sleeved on the focusing rods (306).

3. The handheld laser welding gun with adjustable focal length according to claim 2, characterized in that: The focusing assembly further comprises a first pressure sensor (309); a connecting sleeve (310) is provided on the focusing tube (301); the connecting sleeve (310) is connected to the focusing tube (301); a tympanum (311) is provided at the bottom of the connecting sleeve (310); the first pressure sensor (309) is located below the tympanum (311) and is mounted on the focusing tube (301); the top of the first pressure sensor (309) is in contact with the tympanum (311); the ventilation tube (304) is located between the focusing lens frame (305) and one group of the light-transmitting lenses (302); ventilation grooves (312) are provided on both sides of the focusing tube (301); the ventilation grooves (312) are located between the focusing lens frame (305) and another group of the light-transmitting lenses (302).

4. The handheld laser welding gun with adjustable focal length according to claim 1, characterized in that: The source assembly comprises a reflector (501), the reflector (501) being located in the main body cavity, the focus adjustment assembly being located between the reflector (501) and the light emitting tube (13), the reflector (501) being clamped in a reflector frame (502), two groups of connecting frames (22) being obliquely arranged in the main body cover (21), the reflector frame (502) being clamped between the two groups of connecting frames (22) and being connected by screws, the reflector (501) being in an inclined shape, and the inclination angle of the reflector (501) being the same as that of the connecting frames (22); a magnet (23) being arranged between the two groups of connecting frames (22), the magnet (23) being mounted on the main body cover (21), a metal plate (503) being arranged on the top of the reflector frame (502), the metal plate (503) being in contact with the magnet (23).

5. The handheld laser welding gun with adjustable focal length according to claim 4, characterized in that: The source assembly further comprises a mounting seat (504) and a laser (505); a connection port (24) is provided on one side of the main body cover (21); the mounting seat (504) is sleeved on the connection port (24); the laser (505) is located at one end of the mounting seat (504); L-shaped connection blocks (506) are provided on both sides of the laser (505); the mounting seat (504) is provided with two groups of connection slots (507); the L-shaped connection blocks (506) One end is clamped in the connecting slot (507); mounting plates (508) are provided on both sides of the mounting seat (504); one end of the mounting plate (508) is connected to the mounting seat (504) and the connecting port (24) via mounting screws; a mounting slot (509) is provided on the laser (505); the other end of the mounting plate (508) is clamped in the mounting slot (509); and the laser (505) and the mounting seat (504) are detachably connected.

6. The handheld laser welding gun with adjustable focal length according to claim 5, characterized in that: A collimator frame (510) is arranged between the mounting seat (504) and the connecting port (24); a plurality of positioning blocks (511) are arranged on the collimator frame (510); a positioning hole (512) is provided on the mounting seat (504) corresponding to the positioning block (511); the positioning block (511) is clamped in the positioning hole (512); a collimator (513) is installed in the collimator frame (510); the laser (505), the collimator (513) and the reflector (501) are arranged in sequence in a straight line; the collimator (513) is located between the laser (505) and the reflector (501).

7. The handheld laser welding gun with adjustable focal length according to claim 1, characterized in that: A cold air cavity is provided at one end of the main body cover (21), and a heat sink (61) is provided at one end of the main body cover (21). The heat sink (61) is clamped in the cold air cavity, and a fan (62) is installed at one end of the heat sink (61). A plurality of ventilation holes (63) are provided in the heat sink (61), and the ventilation holes (63) are tapered. Two groups of air outlet pipes (64) that pass through the cold air cavity are provided at one side of the main body cover (21), and one group of the air outlet pipes (64) is connected to the main body cavity through an air guide pipe. A copper conduit (313) is wound around the focusing tube (301), and one end of the copper conduit (313) is passed through the outside of the main body cavity and is connected to one group of the air outlet pipes (64) through the air guide pipe, and the other end of the copper conduit (313) is located in the main body cavity. A plurality of heat dissipation slots (25) are provided at one side of the main body cover (21), and a temperature sensor (65) is provided in the main body cavity.

8. The handheld laser welding gun with adjustable focal length according to claim 1, characterized in that: A cold air cavity is provided at one end of the main body cover (21), a heat sink (61) is provided at one end of the main body cover (21), the heat sink (61) is clamped in the cold air cavity, a fan (62) is installed at one end of the heat sink (61), a dust screen (66) is installed on one side of the fan (62), a plurality of ventilation holes (63) are provided in the heat sink (61), and the ventilation holes (63) are conical; two groups of air outlet pipes (64) are provided on one side of the main body cover (21) and are connected to the cold air cavity, one group of the air outlet pipes (64) passes through an air guide pipe The focusing tube (301) is connected to the main body cavity, and a copper conduit (313) is wound around the focusing tube (301). One end of the copper conduit (313) is passed through the outside of the main body cavity and is connected to one group of the air outlet pipes (64) through the air guide pipe. The other end of the copper conduit (313) is located in the main body cavity. A plurality of heat dissipation pipes (67) are arranged on one side of the main body cover (21). The main body cavity is connected to the outside through the heat dissipation pipes (67). A dust cover (68) is provided on one end of the heat dissipation pipe (67). A temperature sensor (65) is arranged in the main body cavity.

9. The handheld laser welding gun with adjustable focal length according to claim 1, characterized in that: The gun body (11) has a mounting cavity in its handle, and a mounting box (14) is disposed below the gun body (11). The mounting box (14) is mounted in the mounting cavity and is detachably connected to the gun body (11) via screws. The control module (42) is mounted in the mounting box (14), and the connector (41) is located in the mounting cavity. The gun body (11) has a slot (15), and a second pressure sensor (16) is mounted on the connector (41). The second pressure sensor (16) is located on one side of the slot (15). An operating block (17) is rotatably disposed on the gun body (11), and the operating block (17) can pass through the slot (15) to contact the second pressure sensor (16).

10. The handheld laser welding gun with adjustable focal length according to claim 9, characterized in that: A fixing seat (45) is arranged below the gun body (11), a fixing seat (18) is arranged at the bottom of the gun body (11), the fixing seat (18) is clamped on the fixing seat (45), a strong magnet (46) is arranged on the fixing seat (45), the strong magnet (46) is in contact with the fixing seat (18), and a plurality of groups of counterweights (47) and suction cups (48) are arranged at the bottom of the fixing seat (45).

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