Handheld laser welding gun head

Abstract

The utility model provides a handheld laser welding gun head, and belongs to the technical field of laser welding. The welding gun is used for solving the problems that in the prior art, a welding gun is generally cumbersome in design and not flexible enough in many practical application scenes. Comprising a welding section and a grabbing section which are connected with each other and internally provided with a laser channel, the tail end of the welding section is a welding nozzle, and the tail end of the grabbing section is used for being connected with a laser output interface. The galvanometer assembly is arranged at the joint of the welding section and the grabbing section and reflects laser emitted from a laser channel in the grabbing section into the welding section. The protective lens assembly and the focus lens assembly are arranged on the welding section in a removable mode, and laser emitted into the welding section passes through the focus lens assembly and the protective lens assembly and then is emitted into the welding nozzle. According to the miniaturized handheld laser welding gun, the working efficiency is remarkably improved, and the flexibility of industrial production is promoted.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser welding, in particular to a handheld laser welding gun head. Background Art

[0002] Laser welding is an important processing method in modern industry, which relies on the close cooperation between the main machine and the welding gun. However, the welding gun design in the prior art is generally bulky and usually needs to rely on a robot for operation, which is not flexible enough in many practical application scenarios, especially in situations where space is limited or rapid response is required, and its use is greatly restricted.

[0003] In order to overcome this limitation, it is particularly important to design a miniaturized, handheld laser welding gun. Such a design will enable laser welding technology to be more widely used in various scenarios, improve work efficiency, reduce operating difficulty, and bring more convenience and possibilities to industrial manufacturing. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a handheld laser welding gun head, which is used to solve the problem that the welding gun design in the prior art is generally bulky and not flexible enough in many practical application scenarios.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a handheld laser welding gun head, comprising a welding section and a gripping section which are connected to each other and have a laser channel inside, the end of the welding section is a welding nozzle, and the end of the gripping section is used to connect with a laser output interface, characterized in that: it also includes a galvanometer assembly, a focusing lens assembly and a protective lens assembly;

[0006] The galvanometer assembly is disposed at the connection between the welding section and the grasping section, and reflects the laser light injected from the laser channel in the grasping section into the welding section;

[0007] The protective lens assembly and the focusing lens assembly are removably arranged at the welding section, and the laser beam incident on the welding section passes through the focusing lens assembly and the protective lens assembly and then incident on the welding nozzle.

[0008] Optionally, the galvanometer assembly includes a galvanometer motor and a galvanometer lens;

[0009] The galvanometer motor is fixed on the housing, and the galvanometer lens is connected to the output shaft of the galvanometer motor;

[0010] Initially, the plane of the vibration plate is perpendicular to the bisector of the angle between the axes of the welding section and the grasping section.

[0011] Optionally, the focusing lens assembly includes a first drawer box and a focusing lens;

[0012] The first drawer box is provided with a through hole, and the focusing lens is installed in the hole;

[0013] The welding section is provided with a first cavity for inserting the first drawer box;

[0014] After the first drawer box is inserted into the first cavity, the focusing lens is concentric with the laser channel.

[0015] Optionally, the protective lens assembly includes a second drawer box and a protective lens;

[0016] The second drawer box is provided with a through hole, and the protective lens is installed in the hole;

[0017] The welding section is provided with a second cavity for inserting the second drawer box;

[0018] After the second drawer box is inserted into the second cavity, the protective lens covers the laser channel.

[0019] Optionally, the welding section includes a body and a barrel that cooperate with each other;

[0020] The body is a hole end, the gun barrel is an axis end, and the gun barrel is detachably inserted into the body.

[0021] Optionally, a clamp structure is provided on the body;

[0022] When released, the barrel can be inserted into or removed from the body;

[0023] When tightened, the barrel is fixed in the body.

[0024] Optionally, a cooling medium interface, a protective gas interface and an electrical signal interface for connecting to a host machine are provided at the end of the gripping section.

[0025] Optionally, the cooling medium interface includes a first medium port, a second medium port and a first communication hole;

[0026] The first medium port and the second medium port are connected from the end of the gripping section to the connecting portion of the welding section and the gripping section, and then connected to form a loop through the first connecting hole.

[0027] Optionally, the shielding gas interface passes from the end of the gripping section into the connection between the welding section and the gripping section, then enters the welding section, exceeds the range of the shielding mirror assembly and the focusing mirror assembly, and finally passes into the laser channel through the second connecting hole.

[0028] Optionally, the wiring harness of the electrical signal interface is connected to the galvanometer assembly via an electrical signal.

[0029] As described above, the handheld laser welding gun head of the utility model has at least the following beneficial effects:

[0030] First, its portability allows laser welding technology to be easily applied to various complex or confined spaces, greatly broadening the application scenarios. Secondly, handheld operation improves the flexibility and response speed of operation, making the welding process more efficient and faster. Furthermore, this design reduces the dependence on professional manipulators, reduces equipment costs, and also lowers the operating threshold, allowing more technicians to master and use laser welding technology. In summary, the application of miniaturized, handheld laser welding guns will significantly improve work efficiency and promote the flexibility of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The display is a three-dimensional schematic diagram of the utility model.

[0032] Figure 2 It is a three-dimensional schematic diagram of the utility model from another angle.

[0033] Figure 3 The utility model is shown as a partially cutaway schematic diagram of the protective gas interface.

[0034] Figure 4 It is a schematic diagram of a partial cutaway of the utility model from the first medium port.

[0035] Among them: welding section 30, welding nozzle 301, barrel 302, clamp structure 303, first cavity 304, second cavity 305, grasping section 31, first medium port 311, second medium port 312, first connecting hole 313, second connecting hole 314, protective gas interface 315, electrical signal interface 316, galvanometer assembly 32, galvanometer motor 321, galvanometer lens 322, focusing lens assembly 33, first drawer box 331, focusing lens 332, protective lens assembly 34, second drawer box 341, protective lens 342. DETAILED DESCRIPTION

[0036] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0037] See also Figures 1 to 4. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0038] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0039] For this example, please refer to Figure 1-4 The utility model provides an embodiment of a handheld laser welding gun head, comprising a welding section 30 and a gripping section 31 which are connected to each other and have a laser channel inside. The end of the welding section 30 is a welding nozzle 301, and the end of the gripping section 31 is used to connect with a laser output interface. The other end of the laser output interface is connected to a laser welding host, and the laser welding host provides control signals, coolant, laser beam and protective gas. It also includes a galvanometer assembly 32, a focusing lens assembly 33 and a protective lens assembly 34.

[0040] like Figure 4 As shown: the galvanometer assembly 32 is arranged at the connection between the welding section 30 and the gripping section 31, and reflects the laser light injected from the laser channel in the gripping section 31 into the welding section 30. When in use, the tail end of the welding gun head is connected to the host through the optical fiber harness, and the laser light is injected therefrom, reflected by the galvanometer assembly 32, and then injected into the nozzle of the welding gun head. The laser energy melts the surface of the workpiece or the external welding wire, thereby realizing welding;

[0041] The protective lens assembly 34 and the focusing lens assembly 33 are removably disposed at the welding section 30 . The laser beam incident on the welding section 30 passes through the focusing lens assembly 33 and the protective lens assembly 34 and then incident on the welding nozzle 301 .

[0042] The focusing mirror assembly 33 is used to convert the parallel input laser beam into a focused laser beam. Its main function is to accurately focus the laser beam on a very small point at the welding part, thereby improving the efficiency and quality of welding. Through focusing, the energy density of the laser beam is significantly increased, and it can quickly melt and connect the welding materials to achieve high-quality welding effects. In addition, the focusing mirror can also protect the laser source to a certain extent, reduce the loss and scattering of the laser during transmission, and ensure the effective use of laser energy.

[0043] The protective mirror assembly 34 can effectively block the spatter, slag and other debris generated during the welding process, preventing these debris from directly impacting and damaging the focusing mirror or other precision parts, thereby extending the service life of the welding gun. Secondly, the protective mirror can also prevent the laser beam from being disturbed by impurities such as dust and particles during transmission, ensuring the stable transmission and focusing effect of the laser energy. In addition, for handheld laser welding guns, the protective mirror can also reduce the damage of laser radiation to operators to a certain extent, providing additional safety protection.

[0044] In short, see Figure 4 The laser in the handheld laser welding gun head enters the welding gun from the tail end through the optical fiber bundle (not shown in the figure), enters the welding section 30 after being reflected by the focusing lens assembly 33, and then is focused by the focusing lens assembly 33, and finally passes through the protective lens assembly 34 and irradiates the welding part.

[0045] The galvanometer assembly 32, the focusing lens assembly 33 and the protective lens assembly 34 are all connected to the welding gun head body in a detachable manner, so they can be adjusted and replaced. It allows each component to be easily and accurately adjusted to meet different welding requirements and improve welding accuracy and quality. At the same time, this modular design facilitates the rapid replacement of damaged or aged parts, reduces maintenance costs, and improves work efficiency. This detachable connection method enhances the flexibility and durability of the welding gun, bringing great convenience to laser welding operations.

[0046] The welding gun itself is small in size and light in weight, which greatly improves the portability and flexibility of the welding gun, allowing operators to easily carry out handheld operations, whether in narrow spaces or at heights. Secondly, the lightweight welding gun reduces the burden on operators, reduces fatigue during long-term operations, improves work efficiency and safety, broadens application scenarios, and improves the operating experience.

[0047] Specifically, if Figure 4As shown, the galvanometer assembly 32 includes a galvanometer motor 321 and a galvanometer piece 322, wherein the galvanometer piece 322 is a reflector; the galvanometer motor 321 is fixed on the shell, and the galvanometer piece 322 is connected to the output shaft of the galvanometer motor 321; initially, the plane of the galvanometer piece 322 is perpendicular to the bisector of the angle between the axes of the welding section 30 and the grasping section 31.

[0048] The galvanometer assembly is a special optical device, more specifically, it is a special reflective lens controlled by a swinging motor. Unlike ordinary rotary motors, the rotor of the galvanometer cannot achieve a complete rotation, but can only deflect. The angle of this deflection is proportional to the current passing through the galvanometer motor, so the galvanometer is also called a galvanometer scanner. When the electrical signal acts on the galvanometer motor through the driver circuit board, it drives the galvanometer lens to swing (vibrate) at a very high speed, thereby changing the direction of the light beam. The galvanometer assembly can significantly improve the accuracy and efficiency of welding. Specifically, the galvanometer assembly can achieve precise orientation of the reflection direction of the laser beam and accurately focus the laser beam on the template welding point, which is crucial to improving the welding quality. In addition, the high-speed response and precise control characteristics of the galvanometer make the welding process more flexible and efficient, and can cope with complex and changing welding needs.

[0049] like Figure 4 As shown, the focusing lens assembly 33 includes a first drawer box 331 and a focusing lens 332. The focusing lens is used to focus the laser beam, and the types include plano-convex lenses and composite lenses. These lenses are usually made of materials with high light transmittance and high thermal stability, such as quartz glass, to ensure that the laser beam can maintain high energy density and stability during the focusing process; a through hole is provided on the first drawer box 331, and the focusing lens 332 is installed in the hole; a first cavity 304 for the first drawer box 331 to be inserted is provided on the welding section 30; after the first drawer box 331 is inserted into the first cavity 304, the focusing lens 332 is concentric with the laser channel. After the first drawer box 331 is inserted into the first cavity 304, it is fixedly connected to the welding gun head body by screws, and screws that are convenient to tighten by hand can be used.

[0050] like Figure 4 As shown, the protective lens assembly 34 includes a second drawer box 341 and a protective lens 342 (also commonly referred to as a protective lens in the art); the second drawer box 341 is provided with a through hole, and the protective lens 342 is installed in the hole; the welding section 30 is provided with a second cavity 305 for the second drawer box 341 to be inserted; after the second drawer box 341 is inserted into the second cavity 305, the protective lens 342 covers the laser channel. The protective lens is a very important accessory. Since the protective lens needs to withstand very high energy and is a consumable part, it needs to be replaced frequently to ensure the operating efficiency and safety of the equipment. For more information, please refer to Figure 4After the second drawer box 341 for installing the protective mirror is inserted into the second cavity 305 on the welding gun head, it can be fixedly connected to the welding gun head body by screws, and screws that are convenient to tighten by hand can be used.

[0051] This embodiment can be found in Figure 2 The welding section 30 includes a body and a barrel 302 that cooperate with each other; the body is the hole end, the barrel 302 is the shaft end, and the barrel 302 can be detachably inserted into the body. The inside of the barrel 302 is a laser channel, and the end is a welding part. The barrel 302 is also a consumable part. The barrel of a laser welding gun is a consumable part mainly because it needs to withstand high temperature, high pressure and frequent energy shocks during use. These factors can easily cause material fatigue, deformation or even melting, thereby affecting the welding quality and the life of the barrel. In addition, spatter, impurities, etc. during the welding process may also cause wear or blockage on the barrel wall, further accelerating its damage. Therefore, the detachable barrel of the laser welding gun can achieve more convenient maintenance and replacement to ensure the smooth progress of the welding operation.

[0052] Specifically, a clamp structure 303 is provided on the welding gun head body; when loosened, the barrel 302 can be inserted into the body or taken out of the body; when tightened, the barrel 302 is fixed in the body. During the welding operation, when the barrel is damaged, the clamp is loosened, and then the damaged barrel is removed from the gun body, replaced with a new welding gun barrel, and then the clamp is tightened, and the new welding gun barrel is fixed and installed to continue the operation. The maintenance cost and the threshold for use are greatly reduced, the resource utilization efficiency is improved, the service life of the welding gun as a whole is extended, and the phenomenon of the entire gun being scrapped due to damage to the welding nozzle is reduced.

[0053] In this embodiment, Figure 1 As shown, the end of the gripping section 31 is provided with a cooling medium interface, a shielding gas interface 315 and an electrical signal interface 316 for connecting to the main machine. The cooling medium interface is fed with coolant to cool the welding gun, and the shielding gas interface 315 is fed with shielding gas, which is finally ejected from the welding nozzle and wrapped around the welding point. The laser welding shielding gas plays a key role in the welding process. It can effectively isolate the molten pool from the oxygen in the air, prevent oxidation reaction, and thus avoid defects such as spatter and pores. At the same time, the shielding gas can also blow away the plasma generated during the welding process, ensuring that the laser energy reaches the molten pool directly, improving the welding efficiency and quality. The electrical signal interface 316 is connected to the welding machine main machine, and transmits the signal to the main machine according to the pressing of the welding button on the laser welding gun head, and the main machine transmits the laser to the gun head or cuts off the laser output accordingly. At the same time, the galvanometer motor on the laser welding gun head is also connected to the laser main machine through this interface and is controlled by the main machine.

[0054] Furthermore, if Figure 4As shown, the cooling medium interface includes a first medium port 311, a second medium port 312 and a first connecting hole 313; the first medium port 311 and the second medium port 312 are passed from the end of the gripping section 31 into the connection portion of the welding section 30 and the gripping section 31, and then connected to form a loop through the first connecting hole 313. The first connecting hole 313 is drilled from the outside of the welding gun head housing, and at the same time penetrates the ends of the first medium port 311 and the second medium port 312 to connect the two. Then, the opening of the first connecting hole 313 at the outer end of the housing is blocked to prevent the cooling medium from flowing out. As a better practice, the opening of the first connecting hole 313 on the housing can be blocked with a plug-shaped object encapsulated with a temperature sensor. While blocking the outlet, the temperature of the internal cooling medium is measured, and the welding machine host adjusts the temperature and flow of the cooling medium accordingly to maintain the best cooling effect.

[0055] Furthermore, if Figure 3 As shown, the shielding gas interface 315 passes from the end of the gripping section 31 into the connection between the welding section 30 and the gripping section 31, then enters the welding section 30, exceeds the range of the protective mirror assembly 34 and the focusing mirror assembly 33, and finally passes into the laser channel through the second connecting hole 314, and finally follows the laser beam to reach the welding point from the welding nozzle hole of the welding gun head, covering the welding part, and playing a protective role. The second connecting hole 314 runs from the outside of the shell to the inside of the shell, connecting the shielding gas interface 315 with the laser channel in the center of the shell, and finally blocks the second connecting hole 314 outside the shell to prevent shielding gas leakage.

[0056] In this embodiment, the wiring harness of the electrical signal interface 316 is electrically connected to the galvanometer assembly 32. A wiring harness terminal block is provided at the electrical signal interface 316, and a corresponding wiring harness terminal block is provided on the laser output interface at the other end that is plugged into the welding gun head. The two are plugged into each other to connect the welding gun and the welding host. At the connection between the welding section 30 and the gripping section 31, the channel in the welding section 30 passes through the shell to form a third cavity for installing the galvanometer assembly 32. The galvanometer assembly 32 includes a drive control board and an actuator. The actuator is loaded from the third cavity. The actuator includes a galvanometer motor 321 and a galvanometer lens 322; the galvanometer motor 321 is fixed to the third cavity of the shell, and the galvanometer lens 322 is connected to the output shaft of the galvanometer motor 321. The galvanometer motor 321 controls the installation angle of the galvanometer lens 322. The entire galvanometer group is easy to disassemble and maintain.

[0057] In summary, the utility model effectively overcomes various shortcomings in the prior art, can produce beneficial technical effects, and has significant progress.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A handheld laser welding gun head, characterized in that: It comprises a welding section (30) and a gripping section (31) which are connected to each other and have a laser channel therein, the end of the welding section (30) is a welding nozzle (301), and the end of the gripping section (31) is used to connect to a laser output interface, and is characterized in that it also comprises a galvanometer assembly (32), a focusing lens assembly (33) and a protective lens assembly (34); The galvanometer assembly (32) is arranged at the connection between the welding section (30) and the grasping section (31), and reflects the laser light injected from the laser channel in the grasping section (31) into the welding section (30); The protective mirror assembly (34) and the focusing mirror assembly (33) are removably arranged on the welding section (30); laser light incident on the welding section (30) passes through the focusing mirror assembly (33) and the protective mirror assembly (34) and then incident on the welding nozzle (301).

2. A handheld laser welding gun head as claimed in claim 1, characterized in that: The galvanometer assembly (32) comprises a galvanometer motor (321) and a galvanometer lens (322); The galvanometer motor (321) is fixed on the housing, and the galvanometer lens (322) is connected to the output shaft of the galvanometer motor (321); Initially, the plane of the vibration lens (322) is perpendicular to the bisector of the angle between the axes of the welding section (30) and the grasping section (31).

3. A handheld laser welding gun head as claimed in claim 1, characterized in that: The focusing lens assembly (33) comprises a first drawer box (331) and a focusing lens (332); The first drawer box (331) is provided with a through hole, and the focusing lens (332) is installed in the hole; The welding section (30) is provided with a first cavity (304) for inserting the first drawer box (331); After the first drawer box (331) is inserted into the first cavity (304), the focusing lens (332) is concentric with the laser channel.

4. A handheld laser welding gun head as claimed in claim 1, characterized in that: The protective lens assembly (34) comprises a second drawer box (341) and a protective lens (342); The second drawer box (341) is provided with a through hole, and the protective lens (342) is installed in the hole; The welding section (30) is provided with a second cavity (305) for inserting the second drawer box (341); After the second drawer box (341) is inserted into the second cavity (305), the protective lens (342) covers the laser channel.

5. A handheld laser welding gun head as claimed in claim 1, characterized in that: The welding section (30) comprises a body and a gun barrel (302) that cooperate with each other; The body is a hole end, the gun barrel (302) is an axis end, and the gun barrel (302) is detachably inserted into the body.

6. A handheld laser welding gun head as claimed in claim 5, characterized in that: The main body is provided with a clamp structure (303); When released, the barrel (302) can be inserted into the body, or removed from the body; When tightened, the barrel (302) is fixed in the body.

7. A handheld laser welding gun head as claimed in claim 1, characterized in that: The end of the gripping section (31) is provided with a cooling medium interface, a protective gas interface (315) and an electrical signal interface (316) for connecting to a host machine.

8. A handheld laser welding gun head as claimed in claim 7, characterized in that: The cooling medium interface comprises a first medium port (311), a second medium port (312) and a first communication hole (313); The first medium port (311) and the second medium port (312) are connected from the end of the gripping section (31) to the connecting portion of the welding section (30) and the gripping section (31), and then connected to form a loop through the first connecting hole (313).

9. A handheld laser welding gun head as claimed in claim 7, characterized in that: The protective gas interface (315) passes from the end of the gripping section (31) into the connection between the welding section (30) and the gripping section (31), then enters the welding section (30), exceeds the range of the protective mirror assembly (34) and the focusing mirror assembly (33), and finally passes into the laser channel through the second connecting hole (314).

10. A handheld laser welding gun head as claimed in claim 7, characterized in that: The wiring harness of the electrical signal interface (316) is electrically signal connected to the galvanometer assembly (32).

Images