Optical fiber protection head of optical fiber output end of laser welding machine

Abstract

The utility model discloses an optical fiber protection head of an optical fiber output end of a laser welding machine. The optical fiber protection head comprises a main shell, a lens and an end cover. The main shell is internally provided with a hollow cavity penetrating through the upper end and the lower end; the upper part in the cavity is used for mounting a laser fiber head; the lens is arranged at the lower part in the cavity position; the end cover is connected to the lower end of the main shell and used for protecting and fixing the lens. According to the technical scheme, the problem that the end head of the optical fiber head of the existing optical fiber output end is easy to pollute when being assembled on machine equipment is solved, the optical fiber protection head and the optical fiber head are assembled and then leave a factory, the optical fiber head is prevented from being directly exposed, and the optical fiber head is prevented from being polluted when being directly installed on a welding machine. Faults of a laser welding head of the laser welding machine can be reduced, the service life of the machine is prolonged, and the repair and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding equipment accessories, in particular to an optical fiber protection head for an optical fiber output end of a laser welding machine. Background Art

[0002] Fiber laser welding machine is a kind of laser welding equipment that couples high-energy laser beam into optical fiber, transmits it over a long distance, collimates it into parallel light through a collimator, and then focuses it on the workpiece for welding. It has greater flexibility for flexible transmission and non-contact welding of parts that are difficult to access. The fiber output end of the existing laser welding machine is a lens-exposed optical fiber head, which is connected to the optical fiber. Its end face is a clean special lens, and the cleanliness requirements for the optical fiber head are very high. The device needs to be installed on the welding arm of laser welding. During the installation process, it is very easy to cause the end face of the optical fiber head to be contaminated due to improper operation, accidental entry of dust, debris, hair, oily fingerprints and other pollutants. When the contaminated optical fiber head is fixedly installed on the welding arm, when the laser welding machine is working, the high-energy laser is output to the contaminated optical fiber head, which may instantly generate high temperature at the connection end and burn the connection end. Even if the degree of contamination is small and will not immediately cause the optical fiber head to be scrapped, it still has a great impact on the service life of the optical fiber head. This leads to machine failure and high repair and maintenance costs. Utility Model Content

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a fiber optic protective head for the optical fiber output end of a laser welding machine to solve the problem that the existing optical fiber head at the optical fiber output end is easily contaminated when assembled to the machine equipment. The optical fiber protective head is assembled with the optical fiber head before leaving the factory, which avoids the optical fiber head being exposed to the outside, thereby avoiding the optical fiber head being contaminated when it is directly installed with the welding machine.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is a laser-welded optical fiber output end optical fiber protection head, which includes:

[0005] A main shell, wherein a hollow cavity is provided in the main shell and passes through the upper and lower ends, and the upper part of the cavity is used to install a laser fiber head;

[0006] A lens, wherein the lens is disposed in the lower part of the cavity;

[0007] The end cover is connected to the lower end of the main shell and is used to protect and fix the lens.

[0008] Furthermore, the main shell is cylindrical, and the cavity inside the main shell includes a middle cavity, an upper through hole cavity, and a lower port cavity. The middle cavity space is adapted to the shape of the laser fiber head, the diameter of the upper through hole cavity is adapted to the outer diameter of the optical fiber cable connected to the laser fiber head, and the diameter of the lower port cavity is adapted to the size of the lens, and the lens is embedded in the lower port cavity.

[0009] Furthermore, the caliber of the lower port cavity is larger than that of the middle cavity, and the lower port cavity and the middle cavity form a stepped hole, on which a first concave ring is provided, in which a first sealing ring is embedded, and the first sealing ring is used to seal the upper end surface of the lens and the middle cavity.

[0010] Furthermore, the end cover includes a hollow cylindrical cover wall and a cover edge arranged inward at the lower end of the cover wall, a through hole is formed on the inner side of the cover edge, the cover wall and the cover edge are integrally formed, a second concave ring position is provided at the connection between the cover wall and the cover edge, and a second sealing ring is embedded in the second concave ring position.

[0011] Furthermore, the outer wall of the lower port cavity of the main shell is connected with the inner wall of the cover wall of the end cover by interference fit.

[0012] Furthermore, an outer wall of the lower port cavity of the main shell is provided with an external thread, an inner wall of the cover wall of the end cover is provided with an internal thread, and the end cover is connected to the main shell through threads.

[0013] Furthermore, the upper end of the main shell is provided with a hand-held end portion connected to the upper through hole cavity, and a through hole with the same diameter as the upper through hole cavity is provided in the hand-held end portion.

[0014] Furthermore, the edge of the upper end of the main shell is provided with a flange portion extending outwardly in the circumferential direction, and a third sealing ring is sleeved on the outer wall of the main shell, and the third sealing ring is supported by the flange portion.

[0015] The beneficial effects of the utility model are as follows: the optical fiber protection head designed by the technical solution, when the optical fiber head at the optical fiber output end of the laser welding machine leaves the factory, is provided with an optical fiber protection head through a dust-free workshop and clean operating procedures, so that the optical fiber head is prevented from being exposed to the outside, thereby avoiding the optical fiber head from being contaminated when it is directly installed with the welding machine. The structural design of the optical fiber protection head is simple and reasonable, the space of the middle cavity of the main shell of the optical fiber protection head is adapted to the shape of the laser optical fiber head, and the first sealing ring and the second sealing ring are respectively provided on the upper and lower end faces of the lens to achieve double sealing, ensuring that external foreign matter does not enter the interior of the main shell. The optical fiber head is prevented from being directly exposed to the outside, thereby avoiding the optical fiber head from being contaminated when it is directly installed with the welding machine. It is beneficial to reduce the failure of the laser welding head of the laser welding machine and reduce the repair and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure decomposition of the utility model.

[0017] Figure 2 It is a schematic diagram showing another perspective of the overall structure of the utility model.

[0018] Figure 3 It is a structural sectional view of the utility model. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present disclosure.

[0020] See also Figures 1 to 3 , an optical fiber protection head for the output end of a laser-welded optical fiber, comprising a main shell 1, a lens 2, and an end cover 3. A hollow cavity penetrating the upper and lower ends is arranged in the main shell 1, and the upper part of the cavity is used to install a laser optical fiber head; the lens 2 is arranged in the lower part of the cavity; the end cover 3 is connected to the lower end of the main shell 1, and is used to protect and fix the lens 2.

[0021] Reference Figure 3 As a preferred implementation scheme, the main shell 1 is cylindrical, and the cavities inside the main shell 1 include a middle cavity 10a, an upper through hole cavity 10b, and a lower port cavity 10c. The space of the middle cavity 10a is adapted to the shape of the laser fiber head, the diameter of the upper through hole cavity 10b is adapted to the outer diameter of the optical fiber cable connected to the laser fiber head, and the diameter of the lower port cavity 10c is adapted to the size of the lens 2, and the lens 2 is embedded in the lower port cavity 10c.

[0022] Preferably, the caliber of the lower port cavity 10c is larger than the caliber of the middle cavity 10a, and the lower port cavity 10c and the middle cavity 10a form a stepped hole, on which a first concave ring position 102 is provided, and a first sealing ring 4 is embedded in the first concave ring position 102, and the first sealing ring 4 is used to seal the upper end surface of the lens 2 and the middle cavity 10a.

[0023] Preferably, the end cap 3 comprises a hollow cylindrical cover wall 301 and a cover edge 302 disposed inwardly at the lower end of the cover wall 301, a through hole is formed inside the cover edge 302, the cover wall 301 and the cover edge 302 are integrally formed, a second concave ring position 303 is disposed at the connection between the cover wall 301 and the cover edge 302, and a second sealing ring is embedded in the second concave ring position 303. The first sealing ring 4 and the second sealing ring are respectively disposed on the upper end face and the lower end face of the lens 2 to realize double sealing, so as to ensure that external foreign matter does not enter the interior of the main housing 1.

[0024] As one of the connection schemes between the end cover 3 and the main shell 1 , the outer wall 101 of the lower port cavity 10c of the main shell 1 is connected with the inner wall of the cover wall 301 of the end cover 3 by interference fit.

[0025] As the second connection scheme between the end cover 3 and the main shell 1, the outer wall 101 of the lower end cavity 10c of the main shell 1 is provided with an external thread, the inner wall of the cover wall 301 of the end cover 3 is provided with an internal thread, and the end cover 3 is connected to the main shell 1 through threads.

[0026] Preferably, the upper end of the main housing 1 is provided with a hand-held end 103 connected to the upper through hole 10b, and a through hole with the same diameter as the upper through hole 10b is provided in the hand-held end 103. The hand-held end 103 is convenient for grabbing the main housing 1 or the entire optical fiber protection head.

[0027] Preferably, the edge of the upper end of the main housing 1 is provided with a flange 104 extending outwardly in the circumferential direction, and a third sealing ring 5 is sleeved on the outer wall of the main housing 1, and the third sealing ring 5 is resisted by the flange 104. When the optical fiber protection head designed in this scheme is installed on the laser welding machine as a whole, the optical fiber protection head is placed in an installation cavity as a whole, and an optical lens is provided at the bottom of the cavity. When the optical fiber protection head is fixed by the third sealing ring, the third sealing ring realizes the sealing of the installation cavity to prevent external dust and foreign matter from entering.

[0028] The optical fiber protection head designed by the technical solution is installed at the optical fiber output end of the laser welding machine through a dust-free workshop and clean operating procedures before the optical fiber head leaves the factory, thereby avoiding the optical fiber head from being exposed to the outside, thereby avoiding the optical fiber head from being contaminated when it is directly installed with the welding machine, which is beneficial to reduce the failure of the laser welding machine, extend the service life of the machine, and reduce the cost of repair and maintenance.

[0029] The above embodiments of the utility model are merely examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. However, obvious changes or modifications derived from the essence of the utility model still fall within the protection scope of the utility model.

Claims

1. An optical fiber protection head for an optical fiber output end of a laser welding machine, characterized in that: include: A main housing (1), wherein a hollow cavity is provided in the main housing (1) and passes through the upper and lower ends, and the upper part of the cavity is used to install a laser optical fiber head; A lens (2), wherein the lens (2) is disposed in the lower part of the cavity; An end cover (3) is connected to the lower end of the main housing (1) and is used to protect and fix the lens (2).

2. The optical fiber protection head at the optical fiber output end of the laser welding machine according to claim 1, characterized in that: The main shell (1) is cylindrical, and the cavities inside the main shell (1) include an intermediate cavity (10a), an upper through hole cavity (10b), and a lower port cavity (10c). The intermediate cavity (10a) is spatially adapted to the shape of the laser fiber head, the aperture of the upper through hole cavity (10b) is adapted to the outer diameter of the optical fiber cable connected to the laser fiber head, and the aperture of the lower port cavity (10c) is adapted to the size of the lens (2), and the lens (2) is embedded in the lower port cavity (10c).

3. The optical fiber protection head at the optical fiber output end of the laser welding machine according to claim 2, characterized in that: The caliber of the lower port cavity (10c) is greater than the caliber of the middle cavity (10a); the lower port cavity (10c) and the middle cavity (10a) form a stepped hole; a first concave ring (102) is provided on the stepped hole; a first sealing ring (4) is embedded in the first concave ring (102); the first sealing ring (4) is used to seal the upper end surface of the lens (2) and the middle cavity (10a).

4. The optical fiber protection head at the optical fiber output end of the laser welding machine according to claim 2, characterized in that: The end cover (3) comprises a hollow cylindrical cover wall (301) and a cover edge (302) arranged inwardly at the lower end of the cover wall (301); a through hole is formed on the inner side of the cover edge (302); the cover wall (301) and the cover edge (302) are integrally formed; a second concave ring position (303) is provided at the connection between the cover wall (301) and the cover edge (302); a second sealing ring is embedded in the second concave ring position (303).

5. The optical fiber protection head at the optical fiber output end of the laser welding machine according to claim 4, characterized in that: The outer wall (101) of the lower port cavity (10c) of the main housing (1) is connected to the inner wall of the cover wall (301) of the end cover (3) by interference fit.

6. The optical fiber protection head at the optical fiber output end of the laser welding machine according to claim 4, characterized in that: The outer wall (101) of the lower end cavity (10c) of the main shell (1) is provided with an external thread, the inner wall of the cover wall (301) of the end cover (3) is provided with an internal thread, and the end cover (3) is connected to the main shell (1) via threads.

7. The optical fiber protection head at the optical fiber output end of the laser welding machine according to claim 2, characterized in that: The upper end of the main housing (1) is provided with a hand-held end (103) connected to the upper through hole cavity (10b), and a through hole with the same diameter as the upper through hole cavity (10b) is provided in the hand-held end (103).

8. The optical fiber protection head at the optical fiber output end of the laser welding machine according to claim 7, characterized in that: The edge of the upper end of the main shell (1) is provided with a flange portion (104) extending outwardly in the circumferential direction, and a third sealing ring (5) is sleeved on the outer wall of the main shell (1), and the third sealing ring (5) is supported by the flange portion (104).

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