CN210524151U

CN210524151U - Novel light path of handheld laser welding head

Info

Publication number: CN210524151U
Application number: CN201921470686.5U
Authority: CN
Inventors: 牛得草; 吴德林; 茅志华
Original assignee: Shenzhen Newton Optics Co Ltd
Current assignee: Shenzhen Newton Optics Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-05-15
Anticipated expiration: 2029-09-05

Abstract

The utility model relates to the technical field of laser welding, in particular to a novel light path of a handheld laser welding head, which comprises an optical fiber output head arranged on the welding head; and an optical instrument for generating elliptical light spots is arranged at the laser emitting end of the optical fiber output head. The utility model has the advantages that the optical instrument for generating the elliptical facula is arranged on the light output head, when the major axis of the facula is orthogonal to the welding seam, the probability that the laser focus deviates from the welding seam can be effectively reduced, and the welding is more facilitated; the utility model discloses only change the light path lens, do not bring additional equipment weight for the soldered connection, do not attach many moving parts with the mirror deflection system that shakes, so weight is lighter, is favorable to handheld processing for a long time and can not be tired.

Description

Novel light path of handheld laser welding head

Technical Field

The utility model relates to a laser welding technical field specifically is a novel light path of handheld laser welding head.

Background

The handheld laser welding process is a supplementary process means of full-automatic numerical control three-dimensional laser welding, and due to the flexibility and convenience of the handheld laser welding process, the unique process advantages of the handheld laser welding process can be shown in places where large-scale machines or robots cannot be constructed, and the handheld laser welding process is increasingly emphasized by people. However, due to subjective randomness of the handheld operation, certain uncertain factors are brought, and when the uncertain factors are serious, welding is adversely affected. The tracking of the weld is one of the factors in which the effect is large. Since the spot size of the laser is small in the focused condition, off-seam missing welding is not impossible. Therefore, the purpose of covering the welding seam is achieved by expanding the welding spot through a defocusing method or expanding the spot through a mechanical galvanometer scanning method, but the power density of the laser is sacrificed as a result.

Meanwhile, linear facula welding is realized through the swinging of the galvanometer, and the mode can effectively solve the defects generated by the first mode: the problems of small light spot and low power density are solved, but the addition of the vibrating mirror brings new problems: the special structure of the vibrating mirror makes the fault rate higher when power of 1000W or above is applied, and the heat of the vibrating mirror and the laser on the vibrating mirror is larger, and a water cooling device must be added on the laser head, thus increasing the equipment cost.

Therefore, in view of the above situation, there is a need to develop a novel optical path for a handheld laser welding head to overcome the shortcomings of the current practical application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel light path of handheld laser welding head to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a novel optical path of a handheld laser welding head comprises an optical fiber output head arranged on the welding head; and an optical instrument for generating elliptical light spots is arranged at the laser emitting end of the optical fiber output head.

As a further aspect of the present invention: the optical fiber output head is a QBH rapid optical fiber laser connector.

As a further aspect of the present invention: the optical instrument comprises a collimating lens and a cylindrical focusing lens, wherein the collimating lens and the cylindrical focusing lens are sequentially arranged along the light beam emission direction.

As a further aspect of the present invention: and a protective lens is arranged on the outer side of the cylindrical focusing lens.

As a further aspect of the present invention: the focal length F of the collimating lens is 30-50 MM.

As a further aspect of the present invention: the focal length F of the cylindrical focusing lens is 100-150 MM.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model has the advantages that the optical instrument for generating the elliptical facula is arranged on the light output head, when the major axis of the facula is orthogonal to the welding seam, the probability that the laser focus deviates from the welding seam can be effectively reduced, and the welding is more facilitated;

2. the utility model discloses only change the light path lens, do not bring additional equipment weight for the soldered connection, do not attach many moving parts with the mirror deflection system that shakes, so weight is lighter, is favorable to handheld processing for a long time and can not be tired.

Drawings

Fig. 1 is a schematic diagram of the structure of the novel optical path of the handheld laser welding head.

Fig. 2 is a screenshot of the beam at a-a in the novel optical path of the handheld laser welding head.

Fig. 3 is a screenshot of the beam at B-B in the novel optical path of the handheld laser welding head.

In the figure: 1-optical fiber output head, 2-collimating lens, 3-cylindrical focusing lens and 4-protective lens.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-3, in an embodiment of the present invention, a novel optical path of a handheld laser welding head includes an optical fiber output head mounted on the welding head; the laser emission end of the optical fiber output head is provided with an optical instrument for generating an elliptical light spot, the cross section of a light beam emitted by the optical fiber output head is changed into an elliptical shape after passing through the optical instrument, when the long axis of the light spot is orthogonal to the welding seam, the probability that the laser focus deviates from the welding seam can be effectively reduced, and the welding is facilitated;

specifically, in this embodiment, the fiber output head is a QBH fast fiber laser connector, and is configured to complete fast access of laser from a laser generator to a welding head;

specifically, in this embodiment, the optical instrument includes a collimating lens 2 and a cylindrical focusing lens 3, the collimating lens 2 and the cylindrical focusing lens 3 are sequentially arranged along a beam emitting direction, the collimating lens 2 shapes a power laser beam (with a certain diffusion angle) transmitted by an optical fiber into a parallel laser beam so as to facilitate next focusing, and the laser beam is extended on a cylindrical surface when passing through the cylindrical focusing lens 3, so as to obtain an elliptical focus;

in order to protect the cylindrical focusing lens 3, a protective lens 4 is further arranged on the outer side of the cylindrical focusing lens 3, and the protective lens 4 mainly prevents high-temperature sparks splashed from a workpiece from damaging the cylindrical focusing lens 3;

when the welding head is actually used, the width and length of the focal point can be adjusted by designing the focal length of the collimating lens 2 and the cylindrical focusing lens 3, wherein the focal length of the collimating lens 2 is preferably 30-50MM, and the focal length of the cylindrical focusing lens 3 is preferably 100-150 MM.

The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. A novel optical path of a handheld laser welding head is characterized by comprising an optical fiber output head arranged on the welding head; and an optical instrument for generating elliptical light spots is arranged at the laser emitting end of the optical fiber output head.

2. The novel optical circuit of a hand-held laser welding head of claim 1, wherein said fiber output head is a QBH fast fiber laser joint.

3. Novel optical path for a hand-held laser welding head according to claim 1 or 2, characterized in that the optical instrument comprises a collimating lens (2) and a cylindrical focusing lens (3), the collimating lens (2) and the cylindrical focusing lens (3) being arranged in sequence along the beam emission direction.

4. A novel optical path for a hand-held laser welding head according to claim 3, characterized in that the outer side of the cylindrical focusing lens (3) is further provided with a protective lens (4).

5. The novel optical path of a hand-held laser welding head according to claim 3, characterized in that the collimating optics (2) has a focal length F-50 MM.

6. The novel optical path of a hand-held laser welding head as claimed in claim 3, characterized in that the focal length F of the cylindrical focusing lens (3) is 100-150 MM.