A protective device for a laser output head

Abstract

This application discloses a protective device for a laser emitting head. The protective device includes a protective cover and an angle adjuster. The protective cover is fitted over the light-emitting portion at one end of the laser emitting head, with an open end facing away from the laser emitting head. The angle adjuster is installed at one end of the laser emitting head and connected to the protective cover, used to adjust the angle of the protective cover relative to the light-emitting portion of the laser emitting head. This laser emitting head protective device allows for adjustment of the angle and orientation of the open end of the protective cover during laser welding or cutting, based on the deflection angle of the laser head. This ensures the protective cover faces the dense area of ​​molten slag generated during welding or cutting, providing better protection.

Description

Technical Field

[0001] This application relates to the field of laser application technology, and in particular to a protective device for a laser emitter head. Background Technology

[0002] Currently, in existing laser welding and / or cutting equipment, the laser output head melts the workpiece at high temperatures due to laser radiation during welding and cutting applications. The disturbance of the protective gas causes molten slag to splatter, requiring operators to wear protective gloves and clothing and to perform welding operations in an environment free of flammable materials; otherwise, it can lead to risks such as fire. In practical operation, it has the following drawbacks: Defect 1: The molten slag that splashes during the welding process is at a high temperature, which may pose a fire risk to surrounding items.

[0003] Second, it has high fire prevention requirements for the workplace, and operators need to wear special protective equipment.

[0004] Therefore, it is necessary to develop a protective device for the laser output head to solve the above-mentioned technical defects. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a protective device for a laser emitter head, which solves the problem that existing laser emitters head do not have built-in protection, requiring operators to take high levels of protection before operation and having high fire prevention requirements for the working environment.

[0006] The present invention solves the above-mentioned technical problems mainly through the following technical solutions: A protective device for a laser emitter head is provided, comprising a protective cover and an angle adjuster. The protective cover is fitted over the light-emitting part at one end of the laser emitter head, and the end of the protective cover facing away from the laser emitter head is open. The angle adjuster is installed at one end of the laser emitter head and connected to the protective cover, and is used to adjust the angle of the protective cover relative to the light-emitting part of the laser emitter head.

[0007] Furthermore, the protective cover is a frustum-shaped shell component, with one end having a larger diameter than the other end, and the light-emitting part is cylindrical.

[0008] Furthermore, the angle adjuster includes three sets of motors and three sets of connecting rods. The three sets of motors are respectively installed on both sides and the top of one end of the laser output head. One end of each of the three sets of connecting rods is connected to one of the three sets of motors. The other end of each of the three sets of connecting rods is movably connected to both sides and the top of the other end of the protective cover. Each connecting rod includes a first connecting arm and a second connecting arm. One end of the first connecting arm and the second connecting arm are hinged together. The other end of the first connecting arm and the other end of the second connecting arm constitute the two ends of the connecting rod.

[0009] Furthermore, it also includes a controller, which is electrically connected to the motor.

[0010] Furthermore, it also includes an angle sensor, which is installed on the outside of one end of the laser output head and is electrically connected to the controller.

[0011] Furthermore, the other end of the protective cover has a flexible fireproof layer inside.

[0012] Furthermore, the other end of the protective cover is mounted outside the light-emitting part via a spherical bearing.

[0013] Furthermore, the angle adjuster includes three sets of telescopic components, which are respectively installed on both sides and the top of one end of the laser output head. The telescopic ends of the three sets of telescopic components are movably connected to a pull rod that is movably connected to the corresponding outer surface of the protective cover.

[0014] Furthermore, the protective cover is a transparent cover.

[0015] Furthermore, the laser output head is a gun-shaped component. The beneficial technical effects of the protective device for the laser output head of this utility model are as follows: During laser welding or cutting, the angle and orientation of the flared end of the protective cover can be adjusted using an angle adjuster according to the deflection angle of the laser head. This allows the protective cover to face the dense area of ​​molten slag generated during welding or cutting, thus forming a better protective measure. To a certain extent, this can reduce the fire protection requirements of the working environment and the fire protection requirements of operators while improving the safety level. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 The isometric view of the protective device for the laser output head provided in this embodiment of the utility model. Figure 1 ; Figure 2 The isometric view of the protective device for the laser output head provided in this embodiment of the utility model. Figure 2 ; Figure 3 This is a side view of the protective device for the laser output head provided in this embodiment of the utility model; Figure 4 This is a top view of the protective device for the laser output head provided in this embodiment of the utility model. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0023] For details, please refer to Figures 1 to 4 This application provides a protective device for a laser emitting head. The protective device is mainly installed at the light-emitting part (a in the figure) of the laser emitting head 3, in a structure that wraps around the light-emitting part. During welding or cutting operations, taking a handheld laser emitting head 3 as an example (which can be a handheld laser welding gun), the main body of the protective device wraps around the light-emitting part of the welding gun. During welding or cutting, the main body of the protective device is close to the weld or cutting seam, and the splashing or drifting of molten slag generated during the welding process will be blocked and intercepted by the protective device.

[0024] Specifically, the protective device includes a protective cover 1 and an angle adjuster 2. The protective cover 1, as the main protective part, is fitted over the light-emitting part of the laser light-emitting head 3, forming a wrap around the light-emitting part. The angle adjuster 2 is installed on the laser light-emitting head 3 near the light-emitting part and is connected to the protective cover 1. The angle adjuster 2 can be used to adjust the offset angle and orientation of the protective cover 1 relative to the light-emitting part, so that the end of the protective cover 1 away from the laser light-emitting head 3 (this end is open) is adjusted to face the dense area of ​​molten slag splashing or drifting, thus intercepting and protecting against molten slag splashing or drifting.

[0025] In actual operation, the reference position of the laser emitting head 3 is defined as downward. Then, during welding or cutting, if the laser emitting head 3 is offset to the left by a certain angle, the dense area of ​​molten slag splashing or drifting is opposite to the offset direction of the laser emitting head 3. That is, the molten slag splashing or drifting is to the right relative to the emitting part of the laser emitting head 3. Then, the angle adjuster 2 is used to adjust the protective cover 1 to be offset to the right relative to the emitting part by a certain angle, so that one end of the protective cover 1 is open and faces the dense area of ​​molten slag splashing or drifting.

[0026] Generally, the angle adjuster 2 can be mechanically adjusted or fully automatic.

[0027] In some embodiments, the light-emitting part of the laser emitting head 3 is designed in a columnar shape, and the protective cover 1 is designed as a horn-shaped or frustum-shaped shell component. Furthermore, during installation, the end of the protective cover 1 with a larger port size (that is, the end with a larger diameter) faces the workpiece, that is, away from the laser emitting head 3. This flared design structure allows the protective cover 1 to have a larger port size to intercept the molten slag when facing it, resulting in better protection.

[0028] In the aforementioned embodiments, since the protective cover 1 is designed as a horn-shaped or frustum-shaped shell component, although the end of the protective cover 1 near the laser emitting head 3 is fitted over the emitting part, there is a gap between the two. Therefore, a flexible fireproof layer is provided inside the port of the protective cover 1 at this end. A perforation is provided in the center of the fireproof layer, through which the emitting part passes. Because the fireproof layer is flexible, the edge of the central perforation will be in close contact with the emitting part. Even when the protective cover 1 needs to be adjusted in angle and orientation relative to the emitting part, the fireproof layer will be squeezed and deformed, always fitting the emitting part, ensuring that molten slag will not pass through this end of the protective cover 1.

[0029] The aforementioned fireproof layer can be made of conventional fireproof mesh, and the mesh size should be designed to be relatively dense.

[0030] Of course, the protective cover 1 can also be designed as a spherical bowl shape or other irregularly shaped flared structure.

[0031] In some embodiments, the protective cover 1 should be designed as a transparent cover. In actual welding or cutting operations, since the protective cover 1 will be close to the weld or cutting seam, designing it as a transparent cover allows the operator's vision to penetrate the protective cover 1 without obstructing the view.

[0032] Generally, the protective cover 1 is made of highly transparent quartz, which has good fire resistance, high temperature resistance, and other properties, and has a relatively long service life. Of course, other fire-resistant, high-temperature resistant, and transparent materials can also be used.

[0033] In some embodiments, referring to the figure, the angle adjuster 2 adopts an automatic adjustment structure, as detailed below: The angle adjuster 2 includes three sets of motors 21 and three sets of connecting rods 22. The three sets of motors 21 and three sets of connecting rods 22 are configured one-to-one and distributed on the two sides and the top of the protective cover 1. The three sets of motors 21 are respectively installed on the two sides and the top of one end of the laser output head 3. One end of each of the three sets of connecting rods 22 is movably connected to the corresponding part of the protective cover 1 near the laser output head 3 (mainly by conventional hinges such as pins, which will not be described in detail here). The other end of each of the three sets of connecting rods 22 is connected to the corresponding motor 21. Specifically, the other end of each of the three sets of connecting rods 22 is provided with a collar that is connected to the shaft of the motor 21.

[0034] Taking the laser emitting head 3 in a horizontal position as an example, the light emitting part of the laser emitting head 3 points horizontally forward. Two sets of motors 21 and connecting rods 22 are distributed on the left and right sides of the laser emitting head 3 and the protective cover 1, and another set of motors 21 and connecting rods 22 are distributed above the laser emitting head 3 and the protective cover 1. If the protective cover 1 needs to be shifted to the left, the motors 21 on the left and right sides will not move, and the motor 21 at the top will run, driving the connecting rod 22 connected to it to swing to the right. Then the connecting rod 22 will drive the end of the protective cover 1 near the laser emitting head 3 to swing to the right. Since the protective cover 1 is movably connected to the ends of the other two sets of connecting rods 22, the opening at one end of the protective cover 1 will shift to the left relative to the light emitting part of the laser emitting head 3. Conversely, if the motor 21 at the top drives the connecting rod 22 to swing to the left, the opening at one end of the protective cover 1 will shift to the right relative to the light emitting part of the laser emitting head 3. Additionally, if the protective cover 1 needs to be tilted upwards, the upper motor 21 will not operate, and the left and right motors 21 will drive the connecting rods 22 connected to them to swing downwards, thereby causing the end of the protective cover 1 closest to the laser emitting head 3 to tilt downwards. Since the upper end of the protective cover 1 is movably connected to the connecting rod 22 above it, the opening at one end of the protective cover 1 will tilt upwards relative to the light emitting part of the laser emitting head 3. Conversely, if the left and right motors 21 drive the connecting rods 22 connected to them to swing upwards, the opening at one end of the protective cover 1 will tilt downwards relative to the light emitting part of the laser emitting head 3.

[0035] More specifically, each connecting rod 22 includes a first connecting arm and a second connecting arm. One end of the first and second connecting arms is hinged by a pin or other conventional structure. The other ends of the first and second connecting arms respectively form the two ends of the connecting rod 22, used to connect to the side end of the protective cover 1 and the main shaft of the motor 21. Taking the connecting rods 22 on both sides of the protective cover 1 as an example, after one end of the first and second connecting arms is connected by a pin, they can swing relative to each other up and down. Similarly, the end of the connecting rod 22 connected to the protective cover 1 is also connected by a pin or a universal joint. The end of the connecting rod 22 connected to the motor 21 is provided with the aforementioned collar and assembled with the motor shaft. When the motor 21 drives the first or second connecting arm connected to it to swing downward, it will cause the end of the protective cover 1 near the motor 21 to shift downward, thereby realizing the upward shift of the opening of one end of the protective cover 1. Similarly, the connecting structure of the upper connecting rod 22 is similar, except that after one end of the first and second connecting arms is connected by a pin, they are allowed to swing relative to each other in the left and right directions.

[0036] In the aforementioned embodiments, four sets of motors 21 and connecting rods 22 can be provided, distributed in the four directions (such as up, down, left, and right) of the protective cover 1 and the laser output head 3. However, it should be noted that among the four sets of motors 21, the two sets of motors 21 distributed on both sides operate synchronously, and the two sets of motors 21 distributed in the upper and lower positions operate synchronously.

[0037] In other embodiments, a controller is also provided, and the motors 21 are electrically connected to the controller. The controller can control the operating status of the three sets of motors 21, thereby driving the protective cover 1 to deflect the angle and orientation of the light-emitting part of the laser light-emitting head 3.

[0038] The controller or control host can use an existing compatible model, which will not be elaborated here.

[0039] In some other embodiments, the adjustment of the protective cover 1 can be fully automatic. An angle sensor 4 is configured on the side of the laser emitting head 3. The angle sensor 4 is used to monitor the angle and orientation changes of the laser emitting head 3 in real time. The operating status of the three sets of motors 21 is adjusted in real time according to the angle and orientation changes, thereby realizing automated protective adjustment.

[0040] Specifically, the angle sensor 4 can be installed in one of the four directions (such as left, right, up, down) of the laser output head 3, together with the three sets of motors 21 mentioned above.

[0041] The angle sensor 4 uses a standard compatible model, which will not be described in detail here.

[0042] The following is a brief introduction to the fully automatic adjustment steps: Step 1: Determine the welding status Angle sensor 4 is used to monitor the tilt angle α and rotation angle β of the laser emitter head 3, and the data is fed back to the controller (control host) to determine the precise attitude of the laser emitter head 3 in space.

[0043] The tilt angle is defined as the angle between the light-emitting part of the laser head 3 and the normal direction of the workpiece.

[0044] The rotation angle is defined as the rotation angle of the light-emitting part of the laser light-emitting head 3 around its own axis.

[0045] The two angles mentioned above directly determine the normal direction of the slag spatter cone angle.

[0046] Step 2: Query the preset model The control host uses conventional algorithms and modeling software to calculate and generate a model of the splashing slag based on the received real-time angle data (α, β). This model is pre-built in a laboratory environment through high-speed photography and statistical analysis, and is mainly a multi-dimensional data table.

[0047] Specific model examples are as follows: When the parameters are α=10° and β=0°, the principal directions of the splash cone angle are (θ, φ). 1) Determine the main direction: The model will give the direction of the central axis of the densest spatter relative to the laser output head 3. This direction is usually represented by a vector V_model.

[0048] 2) Coordinate transformation: The host controller uses the (α, β) provided by the angle sensor 4 to perform coordinate transformation, converting the vector V_model given by the model relative to the welding gun into the vector V_world in the absolute space coordinate system.

[0049] Simply put, knowing where the light-emitting part of the laser head 3 is pointing means knowing where the main axis of the cone angle ejected from the end of the light-emitting part is pointing, which means being able to determine where the dense area of ​​the splatter slag model is, and thus adjusting the deflection of the protective cover 1 relative to the light-emitting part of the laser head 3.

[0050] In some embodiments, the other end of the protective cover 1 is mounted outside the light-emitting part by a spherical bearing. The light-emitting part is designed as a cylinder, and the protective cover 1 adopts a frustum-shaped cover. The end with the smaller diameter can be rotated and deflected around the light-emitting part at multiple angles by means of the assembly of the spherical bearing.

[0051] In other embodiments, the angle adjuster 2 can also be a non-motor-driven structure. Specifically, the angle adjuster 2 includes three sets of telescopic components. The installation orientation of the three sets of telescopic components is the same as the installation orientation and distribution of the three sets of motors 21 and connecting rods 22 mentioned above. They are respectively distributed on both sides and the top of one end of the laser output head 3. The telescopic ends of the three sets of telescopic components extend to the outside of the protective cover 1 and are movably connected to the surface of the protective cover 1 through a shorter pull rod. The specific operation is as follows: during use, the telescopic components on both sides extend on one side and retract on the other side, which can cause the protective cover 1 to deflect to both sides. The telescopic component at the top extends or retracts, which can cause the protective cover 1 to deflect up and down. Of course, the three sets of telescopic components can be linked to achieve multi-angle deflection of the protective cover 1.

[0052] Of course, four sets of telescopic components can be set up, distributed in the four directions of the protective cover 1 and the laser output head 3, but it should be noted that the upper and lower sets of telescopic components operate synchronously and "one extends and the other retracts", and the left and right sets of telescopic components also operate synchronously and "one extends and the other retracts".

[0053] The aforementioned telescopic components can be conventional products such as electric push rods, which will not be elaborated here.

[0054] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0055] The above provides a detailed description of a protective device for a laser emitter head provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A protective device for a laser emitter head, characterized in that: It includes a protective cover (1) and an angle adjuster (2). The protective cover (1) is fitted over the light-emitting part of one end of the laser light-emitting head (3), and the protective cover (1) is open at the end away from the laser light-emitting head (3). The angle adjuster (2) is installed at one end of the laser light-emitting head (3) and connected to the protective cover (1) to adjust the angle of the protective cover (1) relative to the light-emitting part of the laser light-emitting head (3).

2. The protective device for a laser output head according to claim 1, characterized in that: The protective cover (1) is a frustum-shaped shell component, with one end having a larger diameter than the other end, and the light-emitting part is cylindrical.

3. The protective device for a laser output head according to claim 2, characterized in that: The angle adjuster (2) includes three sets of motors (21) and three sets of connecting rods (22). The three sets of motors (21) are respectively installed on both sides and the top of one end of the laser output head (3). One end of the three sets of connecting rods (22) is connected to the three sets of motors (21) one by one. The other end of the three sets of connecting rods (22) is movably connected to both sides and the top of the other end of the protective cover (1). Each connecting rod (22) includes a first connecting arm and a second connecting arm. One end of the first connecting arm and the second connecting arm are hinged together. The other end of the first connecting arm and the other end of the second connecting arm constitute the two ends of the connecting rod (22).

4. The protective device for a laser output head according to claim 3, characterized in that: It also includes a controller, which is electrically connected to the motor (21).

5. The protective device for a laser output head according to claim 4, characterized in that: It also includes an angle sensor (4), which is installed on the outside of one end of the laser output head (3) and is electrically connected to the controller.

6. The protective device for a laser output head according to claim 3, characterized in that: The other end of the protective cover (1) is provided with a flexible fireproof layer.

7. The protective device for a laser output head according to claim 2, characterized in that: The other end of the protective cover (1) is mounted outside the light-emitting part via a spherical bearing.

8. The protective device for a laser output head according to claim 7, characterized in that: The angle adjuster (2) includes three sets of telescopic components. The three sets of telescopic components are respectively installed on both sides and the top of one end of the laser output head (3). The telescopic ends of the three sets of telescopic components are respectively movably connected to a pull rod that is movably connected to the outer surface of the corresponding side of the protective cover (1).

9. A protective device for a laser output head according to any one of claims 1 to 8, characterized in that: The protective cover (1) is a transparent cover.

10. A protective device for a laser emitter head according to any one of claims 1 to 8, characterized in that: The laser output head (3) is a gun-shaped component.

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