Laser welding head

Abstract

The laser welding head comprises a laser head body, the two ends of the laser head body are communicated, a focusing assembly is detachably connected to the first end of the laser head body, a shrinkage nozzle is embedded into the second end of the laser head body, a plurality of cracks are formed in the side wall of the shrinkage nozzle, and one end of the shrinkage nozzle is in a gathering shape towards the center at a preset angle; the inner wall of the second end of the laser head main body is matched with the shrinkage nozzle, and when the shrinkage nozzle is embedded into the second end of the laser head main body, the shrinkage nozzle is extruded by the inner wall of the second end of the laser head main body to be further gathered. The structure complexity of the welding head is reduced, so that the cost is reduced, the requirement for the precision of the shrinkage nozzle is not high, production is more convenient and faster, and through the arrangement of the lens spacer bushes, the interval between the lenses is achieved, and meanwhile a fixing structure is prevented from being arranged in the lens sleeve.

Description

Technical Field

[0001] This utility model relates to the field of laser equipment technology, and in particular to a laser welding head. Background Technology

[0002] A laser welding head is a device used to focus and collimate the laser generated by a laser generator so that the laser produces a predetermined effect when it acts on the workpiece.

[0003] Currently, laser welding heads and laser generator output heads are mostly fixedly connected by snap-fit. Although this method can achieve a fixing effect, it is difficult to eliminate the error of the structural components, resulting in wobbling. Maintaining the center position is quite difficult and requires other structures to ensure that it is in the center, which makes the structure complex. High precision also means high cost.

[0004] Therefore, there is an urgent need to design a laser welding head to overcome the shortcomings of one or more of the existing technologies mentioned above. Utility Model Content

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a laser welding head, characterized in that it includes: a laser head body, the two ends of the laser head body are through, a focusing component is detachably connected to the first end of the laser head body, a constriction nozzle is embedded in the second end of the laser head body, the side wall of the constriction nozzle has several slits, one end of the constriction nozzle is gathered towards the center at a predetermined angle, the inner wall of the second end of the laser head body is adapted to the constriction nozzle, and when the constriction nozzle is embedded in the second end of the laser head body, it is further gathered by the pressure of the inner wall of the second end of the laser head body.

[0006] In a preferred embodiment, the outer side of the second end of the laser head body is stepped and has a first sealing ring, and a fastening nut is also threaded onto the outer side of the second end of the laser head body.

[0007] In a preferred embodiment, the focusing assembly includes: a lens sleeve, the lens sleeve being threadedly connected to a first end of the laser head body, a lens locking member being threadedly connected to the lens sleeve, a convex wall extending horizontally towards the center from one end of the lens sleeve away from the laser head body, a lens spacer being provided between the lens locking member and the convex wall, a collimating lens being provided at one end of the lens spacer, and a focusing lens being provided at the other end.

[0008] In a preferred embodiment, the device further includes a lens protective sleeve, which is connected to the end of the lens sleeve away from the laser head body via a screw thread, and the end of the lens protective sleeve connected to the laser head body is also provided with a protective lens.

[0009] In a preferred embodiment, a second sealing ring is further provided between the protective lens and the focusing lens.

[0010] The beneficial effects of this utility model are: by replacing the traditional buckle with a shrinking nozzle, the fastening force can be ensured while ensuring that the light output head is centered. No other structural assistance is required, which reduces the structural complexity of the welding head and thus reduces costs. Moreover, the precision requirements for the shrinking nozzle are not high, making production more convenient and faster. By setting the lens spacer, the spacing between lenses is achieved while avoiding the need to set a fixed structure in the lens sleeve. Attached Figure Description

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 This is an exploded view of the present invention;

[0013] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0014] In the picture:

[0015] 10. Laser head body; 11. Nozzle; 12. Crack; 13. Fastening nut; 14. First sealing ring;

[0016] 20. Focusing assembly; 21. Lens sleeve; 22. Lens locking element; 23. Convex wall; 24. Lens spacer; 25. Collimating lens; 26. Focusing lens; 27. Lens protective sleeve; 28. Screw sleeve; 29. ​​Protective lens; 30. Second sealing ring. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0019] In this embodiment of the invention, 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. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0020] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0021] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] like Figure 1-Figure 3As shown, a laser welding head is provided, characterized in that it includes: a laser head body 10, with both ends of the laser head body 10 being through, a focusing component 20 being detachably connected to the first end of the laser head body 10, and a constriction nozzle 11 being inserted into the second end of the laser head body 10. The sidewall of the constriction nozzle 11 has several slits 12, and one end of the constriction nozzle 11 is gathered towards the center at a predetermined angle. The inner wall of the second end of the laser head body 10 is adapted to the constriction nozzle 11. When the constriction nozzle 11 is inserted into the second end of the laser head body 10, it is further gathered by the pressure of the inner wall of the second end of the laser head body 10.

[0023] Specifically, the laser head body 10 is a hollow cylinder. A focusing assembly 20 is detachably connected to the first end of the laser head body 10. The focusing assembly 20 is used to collimate and focus the laser. The second end of the laser head body 10 is used to connect to the output head of the laser generator. To facilitate fixing the output head and ensure that the output head is centered, a constriction nozzle 11 is inserted into the second end of the laser head body 10. The side wall of the constriction nozzle 11 has several spaced slits 12, and one end of the constriction nozzle 11 converges towards the center at a predetermined angle. When the output head is inserted into the second end of the laser head body 10, the constricting nozzle 11 will clamp the output head. To increase the clamping force of the constricting nozzle 11, the inner wall of the second end of the laser head body 10 is sloped in cross-section, which matches the angle of the constricting nozzle 11. The tilt angle is slightly smaller than the angle of the constricting nozzle 11, so that when the constricting nozzle 11 is inserted into the second end of the laser head body 10, the inner wall of the laser head body 10 will squeeze the constricting nozzle 11, so that the constricting nozzle 11 will further converge and reduce the diameter under the avoidance of the slit 12, increasing the clamping force on the output head and ensuring the tightness.

[0024] The fixed nozzle 11 is stepped and threaded on the outer side of the second end of the laser head body 10, and is provided with a first sealing ring 14. A fastening nut 13 is connected by the thread. When the fastening nut 13 is tightened, it will compress the insertion degree of the nozzle 11 in the laser head body 10, and at the same time prevent the nozzle 11 from disengaging from the laser head body 10.

[0025] Furthermore, the focusing assembly 20 includes a lens sleeve 21, which is threadedly connected to the first end of the laser head body 10. The inner wall of the lens sleeve 21 is also threaded and connected to a lens locking member 22. At the same time, a convex wall 23 extending horizontally towards the center is provided at the end of the lens sleeve 21 away from the laser head body 10. The collimating lens 25 and the focusing lens 26 are fixed in the lens sleeve 21 by the lens locking member 22 and the convex wall 23. In order to prevent the collimating lens 25 and the focusing lens 26 from being too close and affecting the effect, a lens spacer 24 is also provided between the collimating lens 25 and the focusing lens 26. The lens spacer 24 separates the collimating lens 25 and the focusing lens 26 to ensure the focusing effect of the laser.

[0026] Furthermore, to protect the focusing lens 26, a lens protective sleeve 27 is connected to the end of the lens sleeve 21 away from the laser head body 10 via a screw sleeve 28, and a protective lens 29 is also provided inside the lens protective sleeve 27 to prevent the focusing lens 26 from contacting the outside world. In order to prevent moisture from entering the lens sleeve 21, a second sealing ring 30 is also provided in the lens protective sleeve 27. When the lens protective sleeve 27 is connected to the lens sleeve 21, the second sealing ring 30 is squeezed.

[0027] In summary, this application replaces the traditional snap-fit ​​method with a constriction nozzle 11, which ensures both fastening force and that the light output head is centered without the need for other structural assistance, thus reducing the structural complexity of the welding head and lowering costs. Furthermore, the precision requirements for the constriction nozzle 11 are not high, making production more convenient and faster. By setting the lens spacer 24, the spacing between lenses is achieved while avoiding the need for a fixing structure in the lens sleeve 21.

[0028] This invention is not limited to the description in the specification and embodiments. Therefore, other advantages and modifications can be readily realized by those skilled in the art. Thus, without departing from the spirit and scope of the general concept as defined by the claims and their equivalents, this invention is not limited to the specific details, representative devices and illustrated examples shown and described herein.

Claims

1. A laser welding head, characterized in that, include: The laser head body has two through ends. A focusing component is detachably connected to the first end of the laser head body. A constriction nozzle is embedded in the second end of the laser head body. Several slits are opened on the side wall of the constriction nozzle. One end of the constriction nozzle is gathered towards the center at a predetermined angle. The inner wall of the second end of the laser head body is adapted to the constriction nozzle. When the constriction nozzle is embedded in the second end of the laser head body, it is further gathered by the pressure of the inner wall of the second end of the laser head body.

2. The laser welding head according to claim 1, characterized in that, The outer side of the second end of the laser head body is stepped and has a first sealing ring. A fastening nut is also threadedly connected to the outer side of the second end of the laser head body.

3. The laser welding head according to claim 1, characterized in that, The focusing assembly includes: a lens sleeve, which is threaded to the first end of the laser head body, and a lens locking member is threaded inside the lens sleeve. A convex wall extends horizontally from one end of the lens sleeve away from the laser head body, and a lens spacer is provided between the lens locking member and the convex wall. A collimating lens is provided at one end of the lens spacer, and a focusing lens is provided at the other end.

4. The laser welding head according to claim 3, characterized in that, Also includes: A lens protective sleeve is provided at the end of the lens sleeve away from the laser head body via a screw thread. A protective lens is also provided at the end of the lens protective sleeve connected to the laser head body.

5. The laser welding head according to claim 4, characterized in that, A second sealing ring is also provided between the protective lens and the focusing lens.

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