CN218602902U

CN218602902U - Non-glue QBH laser output head

Info

Publication number: CN218602902U
Application number: CN202223280238.3U
Authority: CN
Inventors: 雷玉; 宋立; 徐�明; 徐磊; 刘宇轩
Original assignee: Changfei Guangfang Wuhan Technology Co ltd
Current assignee: Changfei Guangfang Wuhan Technology Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-03-10
Anticipated expiration: 2032-12-07

Abstract

The utility model discloses a non-glue QBH laser output head, which comprises a water-cooling main body, a conical groove, a quartz end cap, an optical fiber and an optical fiber fixing part; the inner wall of the water-cooling main body rotates and extends along the axial direction of the vertical optical fiber to form a first cavity with two open ends, one end of the first cavity is provided with a conical groove, and the quartz end cap is arranged in the conical groove; the optical fiber fixing part is provided with a first through hole along the axial direction of the optical fiber and a mounting hole perpendicular to the axial direction of the optical fiber and with a preset depth; one end of the optical fiber is connected with the quartz end cap, the other end of the optical fiber is inserted into the first through hole, and the nut is screwed into the mounting hole to abut against the optical fiber so as to fix the optical fiber; be equipped with the second internal thread in the fixed lid of window piece, be provided with the second external screw thread on the outer wall of water-cooling main part to and at least two along optic fibre axial slot, the material of second external screw thread is softer than second internal thread material, so that both fix and form self-locking structure. The utility model discloses laser output head takes the fixed optic fibre of no gluey mode, can effectively avoid the point to glue disconnected fine, the fine risk of burning that causes.

Description

Non-glue QBH laser output head

Technical Field

The utility model relates to a laser beam machining technical field especially relates to a there is not gelatinization QBH laser output head.

Background

The optical fiber laser is the fastest growing laser type in recent years by virtue of the outstanding advantages of compact structure, high conversion efficiency, good beam quality, easy heat dissipation and the like, and accounts for over 50 percent of industrial lasers. The laser output head is a core device of the optical fiber laser and mainly used for flexibly outputting laser, so that the output laser is applied to rear-end processing.

The fiber laser is widely applied to the material processing fields of cutting, welding, drilling and the like, the application environment is complex, and the laser output head is required to have high reliability and meet various environmental requirements; in addition, along with laser output power promotes to the ten thousand watts rank, the power that returns to the output head from the processing material surface during laser application also is higher and higher, and this requires laser output head can bear the height and returns light, avoids the inside heat accumulation of output head to lead to blowing in the course of working.

QBH (Quartz Block Head) is the most common laser output Head, and the mainstream mode of fixing Quartz end cap and rear end optic fibre is that some ultraviolet glues or heat-cure glue in the present QBH manufacturing process, guarantees through the glue solidification that Quartz end cap and rear end optic fibre can't move, and this kind of mode has following shortcoming: (1) the fiber is generally subjected to texturing treatment inside the high-power QBH so as to strip residual pump light and part of return light, the bearing capacity of lateral force of the fiber after texturing is reduced, and if the quartz end cap and the rear-end fiber are fixed by glue, the glue generates stress on the fiber under different environments of high temperature and low temperature due to the fact that the expansion coefficients of the glue, metal and quartz are different, and the fiber texturing region in the middle is easily broken to fail; (2) under the action of high return light, the glue is dispensed and fixed, so that an output head is easy to generate heat and even burn fibers; (3) glue dispensing and fixing need to strictly control glue consumption and glue curing time, so that the process steps are multiple, and the manufacturing efficiency is reduced; if the test is unqualified after dispensing, the quartz end cap and the optical fiber are difficult to disassemble and difficult to repair.

At present, the patent proposes a scheme for fixing a quartz end cap without gelling, one scheme is to arrange a chamfer at the output end of the quartz end cap and press the chamfer through a metal pressing ring, and the other scheme is to arrange a plurality of pins on a window sheet base and radially bend and hold an inner water pipe through the pins so as to fix the end cap. Both schemes only aim at the quartz end cap, and the rear-end optical fiber is still fixed in a dispensing mode, so that the problems still exist. In addition, the first scheme aims at the laser output head without an adapter, and the QBH needs to be matched with the adapter for use, which means that the front end of the QBH output head is limited in size, if a metal pressing ring is added, a water-cooling channel needs to be extended to the metal pressing ring so as to avoid heat from being accumulated and burning a quartz coating surface, and the problem is difficult to realize under the condition of limited size; in the second scheme, the pins on the window sheet base can generate fatigue through repeated bending, and the pins of the window sheet can loosen under the vibration environment to cause that the end caps cannot be held tightly.

In view of this, how to overcome the defects in the prior art is a problem to be solved in the technical field.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is how to solve the conventional glue mode of gluing and fix quartz end cap and rear end optic fibre, glue can produce stress to the optic fibre, thereby leads to the optic fibre in the middle of the easy broken of area of texturing district to become invalid, gao Huifan light down the point glue fixed arouse the output head generate heat even burn the problem that the fixed mode preparation of point glue is inefficient, difficult repairing.

The utility model discloses a realize like this:

the utility model provides a non-glue QBH laser output head, which comprises a water-cooling main body 1, a conical groove 2, a quartz end cap 3, a window piece fixing cover 4, an optical fiber 5 and an optical fiber fixing part 6;

the inner wall of the water-cooling main body 1 rotates and extends along the direction vertical to the installation direction of the optical fiber 5 to form a first cavity 11 with two open ends, one end of the first cavity 11 is provided with a conical groove 2 with two open ends, and the quartz end cap 3 is arranged in the conical groove 2;

the optical fiber fixing part 6 is provided with a first through hole 64 along the axial direction of the optical fiber 5, the optical fiber fixing part 6 is provided with a nut 61, and a mounting hole 62 which is provided with a first internal thread and is vertical to the axial preset depth of the optical fiber 5; the cross section of the first through hole 64 intersects with the bottom of the mounting hole 62, a groove 65 for accommodating an optical fiber is formed at the bottom of the mounting hole 62, one end of the optical fiber 5 is connected with the quartz end cap 3 through the opening of the tapered groove 2, the other end of the optical fiber 5 is inserted into the first through hole 64 and rests in the groove 65, the nut 61 is provided with a first external thread which is matched with the first internal thread, and the nut 61 is screwed into the mounting hole 62 until abutting against the optical fiber 5 so as to fix the optical fiber 5 with the optical fiber fixing component 6;

the inside of window piece fixed cover 4 is provided with the second internal thread, be provided with the second external thread on the outer wall that water-cooling main part 1 is close to 3 sides of quartz end cap, and, be provided with two at least slot 13 on the second external thread, slot 13 sets up along the axial of optic fibre 5, and will the second external thread falls into at least two sections, the material of second external thread compares the internal threaded material of second is soft, so that window piece fixed cover 4 with the external wall of water-cooling main part 1 is fixed and forms the auto-lock structure.

Preferably, the outer shell 7 is sleeved on the outer wall of the water-cooling main body 1 to form a sealed second cavity 12, so that cooling water can be introduced to cool the optical fiber 5.

Preferably, the window piece 41 is arranged at the end of the window piece fixing cover 4, the window piece 41 is a quartz piece plated with an antireflection film, the diameter of the window piece 41 is larger than that of the quartz end cap, and the quartz end cap 3 is arranged in a space formed by the window piece 41 and the window piece fixing cover 4, so as to protect the quartz end cap 3.

Preferably, the tapered groove 2 comprises a tapered portion, the tapered portion of the tapered groove 2 is arranged in the first cavity 11, the shape and size of the quartz end cap 3 are matched with the tapered groove 2, and the tapered end of the quartz end cap 3 is inserted into the tapered groove 2 and abutted against the tapered portion of the tapered groove 2, so that the quartz end cap 3 conducts heat to the water-cooling body (1).

Preferably, a soft pad 63 is disposed in the mounting hole 62, and the soft pad 63 rests on the optical fiber 5 in the mounting hole 62 to prevent the nut 61 from damaging the optical fiber 5.

Preferably, the outer housing 7 is provided with a first opening 71 and a second opening 72, and cooling water enters from the first opening 71 and exits from the second opening 72 so as to cool the optical fiber 5 inside.

Preferably, a reflective pad 8 is arranged in the first cavity 11 and perpendicular to the axial direction of the optical fiber 5, the reflective pad 8 is provided with a second through hole along the axial direction of the optical fiber 5, the first through hole 64, the second through hole and the opening of the tapered portion are on the same axis, and the optical fiber 5 is arranged in the second through hole of the reflective pad 8, so that the optical fiber 5 is fixed.

Preferably, the surface of the cladding of the optical fiber 5 between the corresponding welding point of the quartz end cap 3 and the light reflecting pad 8 is roughened, so that part of the return light entering the quartz end cap 3 is stripped and absorbed by the water-cooled body 1 to prevent the optical fiber 5 from being blown.

Preferably, the inner wall of the water-cooled body 1 is provided with threads so as to increase a heat dissipation area and absorb internally scattered laser light.

Preferably, the water-cooling body 1 and the outer shell 7 are made of high heat-conducting materials so as to facilitate heat conduction.

Compared with the prior art, the utility model discloses the above technical scheme who takes has following beneficial effect:

compared with the prior art, the utility model, the advantage lies in: the utility model relates to a there is not gluey QBH laser output head, the screw thread on the window piece fixed cover and the screw thread on the water-cooling main part form self-locking structure to fix quartz end cap 3 in the water-cooling main part, nut and mounting hole on the optic fibre fixed part cooperate each other to fix the rear end optic fibre in the water-cooling main part, all adopt the glueless mode to fix optic fibre 5 and quartz end cap 3, can effectively avoid glue can produce the problem of stress to the optic fibre, can also avoid Gao Huifan glue under the light problem that the output head that arouses generates heat even burns the fibre; the utility model discloses utilize closely to cooperate between window piece fixed cover 4 and the water-cooling main part 1 of taking slot 13, realize the locking to quartz end cap 3, the mode is more direct effective, and easily realizes on the QBH output, and this mode possesses higher reliability simultaneously, locking structure non-deformable in long-term use, and fastening force is strong, does not receive the influence of vibration environment. Besides, the utility model discloses a fixed optic fibre 5 of mechanical system, it is easy and simple to handle, the preparation is efficient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a cross-sectional view of a non-glue QBH laser output head provided by an embodiment of the present invention;

fig. 2 is a schematic view of an overall structure of a no-glue QBH laser output head provided by the embodiment of the present invention;

fig. 3 is a schematic view of a groove structure of a non-glue QBH laser output head according to an embodiment of the present invention;

fig. 4 is a schematic view of a connection structure between an optical fiber fixing component and a water-cooling main body in a non-glue QBH laser output head according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a second cavity in a water-cooled main body of a non-glue QBH laser output head provided by the embodiment of the present invention;

fig. 6 is a schematic structural view of an optical fiber fixing component of a non-glue QBH laser output head according to an embodiment of the present invention;

wherein the reference numerals are:

1-water cooling the body; 11-a first cavity; 12-a second cavity; 13-a trench; 2-a tapered groove; 3-a quartz end cap; 4-window sheet fixing cover; 41-window piece; 5-an optical fiber; 6-optical fiber fixing component; 61-a nut; 62-mounting holes; 63-a soft cushion; 64-a first through-hole; 65-grooves; 7-an outer shell; 71-a first opening; 72-a second opening; 8-reflective pad.

Detailed Description

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example 1:

the embodiment of the utility model provides a no gelatinization QBH laser output head, as shown in fig. 1-5, including water-cooling main part 1, bell jar 2, quartz end cap 3, window piece fixed cover 4, optic fibre 5 and optic fibre fixed part 6;

the inner wall of the water-cooling main body 1 rotates and extends along the direction vertical to the installation direction of the optical fiber 5 to form a first cavity 11 with two open ends, one end of the first cavity 11 is provided with a tapered groove 2 with two open ends, the quartz end cap 3 is arranged in the tapered groove 2, and the optical fiber fixing part 6 is in threaded connection with the other end of the first cavity 11;

the optical fiber fixing part 6 is provided with a first through hole 64 along the axial direction of the optical fiber 5, the optical fiber fixing part 6 is provided with a nut 61 and a mounting hole 62 which is provided with a first internal thread and is perpendicular to the axial preset depth of the optical fiber 5; the cross section of the first through hole 64 intersects with the bottom of the mounting hole 62, a groove 65 for accommodating an optical fiber is formed at the bottom of the mounting hole 62, one end of the optical fiber 5 is connected with the quartz end cap 3 through the opening of the tapered groove 2, the other end of the optical fiber 5 is inserted into the first through hole 64 and rests in the groove 65, the nut 61 is provided with a first external thread which is matched with the first internal thread, and the nut 61 is screwed into the mounting hole 62 until abutting against the optical fiber 5 so as to fix the optical fiber 5 with the optical fiber fixing component 6;

the inside of window piece fixed cover 4 is provided with the second internal thread, be provided with the second external thread on the outer wall that water-cooling main part 1 is close to 3 sides of quartz end cap, and, be provided with two at least slot 13 on the second external thread, slot 13 sets up along the axial of optic fibre 5, and will the second external thread falls into at least two sections, the material of second external thread compares the internal threaded material of second is soft, so that window piece fixed cover 4 with the external wall of water-cooling main part 1 is fixed and forms the auto-lock structure. Wherein, second external screw thread and second internal thread are the toper screw thread, have the self-tightening effect.

The utility model discloses an one end of the first cavity 11 that the inner wall of water-cooling main part 1 formed is provided with tapered groove 2, the cone end of quartz end cap 3 aligns with the opening of the toper portion of tapered groove 2, the cone end card of quartz end cap 3 is gone into in the toper portion of tapered groove 2, the opening that the cone portion was located is passed through to the one end of optic fibre 5 carries out the butt fusion with the cone end that is quartz end cap 3 fixed, be provided with along the first perforation 64 of 5 axial direction of optic fibre in the optic fibre fixed part 6, the other end of optic fibre 5 inserts first perforation 64 in first cavity 11, and wear out from first perforation 64, then utilize nut 61 is fixed with optic fibre 5 with setting up at optic fibre fixed part 6 axial mounting hole 62. The utility model discloses second internal thread and second external thread can be but not limited to imperial system taper thread, and second external thread and second internal thread mutually support, form the auto-lock structure of auto-lock effect. The utility model discloses a material of second external screw thread is softer than the internal screw thread material of second, for example: the second internal thread is made of stainless steel, and the second external thread is made of red copper which is softer than the stainless steel; when the window sheet fixing cover 4 made of stainless steel is screwed on the water cooling main body 1, the red copper material of the water cooling main body 1 is soft, the second external threads are provided with the grooves 13, the window sheet fixing cover 4 is screwed downwards, the water cooling main body 1 can be pressed by the inward extrusion force of the window sheet fixing cover 4, the quartz end cap 3 is tightly wrapped and locked around, and therefore mechanical self-locking fixation is achieved, and dispensing treatment is not needed. In order to avoid nut 61 screw in the mounting hole 62, cause the damage to optic fibre 5, be provided with cushion 63 in the mounting hole 62, cushion 63 shelves on the optic fibre 5 in the mounting hole 62, in order to avoid nut 61 causes the damage to optic fibre 5. Besides, the connection between the optical fiber fixing component 6 and the first cavity 11 may be a threaded connection, or may be a fixed connection in other manners. It should be noted that, as shown in fig. 5 and 6, the depth of the groove 65 formed by the first through hole 64 and the mounting hole 62 according to the embodiment of the present invention should be slightly smaller than the diameter of the first through hole 64, so that the nut 61 can clamp the optical fiber through the soft pad 63. In addition, the groove 65 of the embodiment of the present invention is actually formed by the first through hole 64 and the bottom of the mounting hole 62. The utility model adopts the glue-free mode to fix the energy transmission optical fiber 5 and the quartz end cap 3, thereby effectively avoiding the risk caused by glue dispensing; the utility model discloses utilize closely to cooperate between window piece fixed cover 4 and the water-cooling main part 1 of taking slot 13, realize the locking to quartz end cap 3, the mode is more direct effective, and easily realizes on the QBH output, and this mode possesses higher reliability simultaneously, locking structure non-deformable in long-term use, and fastening force is strong, does not receive the influence of vibration environment. Besides, the utility model discloses a fixed optic fibre 5 of mechanical system, it is easy and simple to handle, the preparation is efficient.

In order to illustrate the complete solution of the embodiments of the present invention, the following detailed description is given of the details of the present invention. The taper groove 2 comprises a taper part, the taper part of the taper groove 2 is arranged in the first cavity 11, the shape and the size of the quartz end cap 3 are matched with the taper groove 2, the taper end of the quartz end cap 3 is inserted into the taper groove 2 and the taper part of the taper groove 2, so that the quartz end cap 3 conducts heat to the water-cooling main body 1.

Further, as shown in fig. 2 and 5, the optical fiber cooling device further includes an outer shell 7, wherein the outer shell 7 is sleeved on the outer wall of the water-cooling main body 1 to form a sealed second cavity 12, so as to introduce cooling water to cool the optical fiber 5; the outer housing 7 is provided with a first opening 71 and a second opening 72, and cooling water is introduced from the first opening 71 and discharged from the second opening 72 to cool the optical fiber 5 inside.

As shown in fig. 2, the water-cooling body 1 of the present invention is provided with a closed cavity, and the closed cavity is provided with cooling water therein, so as to effectively cool the laser output head. For better giving the utility model discloses biography in the output head can optic fibre 5 and quartz end cap 3 cool down, the embodiment of the utility model provides a set up first opening 71 and second opening 72 on the outer wall of water-cooling main part 1, one of them opening is as the water inlet, and another opening is as the delivery port, pours into the cavity in the water-cooling main part 1 into with cooling water from first opening 71, flows out from second opening 72, walks the heat that can carry optic fibre 5 and quartz end cap 3 through the cooling water area, cools down for it, through cooling water circulation can be quick cool down. It should be noted that the present invention generally provides the first opening 71 and the second opening 72 at the upper and lower ends of the water cooling body 1 respectively, so as to feed cooling water from the opening below and discharge cooling water from the opening above, thereby facilitating better cooling. In addition, the water cooling body 1 and the outer shell 7 of the present invention are made of high thermal conductivity material (for example, made of red copper through gold plating or nickel plating) so as to conduct heat; and, the inner wall of the water-cooling body 1 is provided with threads to increase a heat radiation area and better absorb internally scattered laser light.

Use the utility model discloses an output head's in-process, in-process in order to avoid quartz end cap 3 to use, cause the damage of colliding with foreign object direct contact. The tip of window piece fixed cover 4 is provided with window piece 41, window piece 41 is the quartz piece that has plated the antireflection coating, the diameter of window piece 41 is greater than quartz end cap 3's diameter, quartz end cap 3 sets up in the space that window piece 41 and window piece fixed cover 4 formed to in protection quartz end cap 3. The utility model discloses be provided with window piece fixed cover 4, cup joint the one end in water-cooling main part 1 through window piece fixed cover 4, cover quartzy end cap 3 in window piece fixed cover 4 to cover the tip of window piece fixed cover 4 through window piece 41, under the prerequisite of guaranteeing not influencing quartzy end cap 3 and using, can effectually avoid quartzy end cap 3 to collide with impairedly.

Further, as shown in fig. 1, a reflective pad 8 is disposed in the first cavity 11 and perpendicular to the axial direction of the optical fiber 5, the reflective pad 8 is provided with a second through hole along the axial direction of the optical fiber 5, the first through hole 64, the second through hole and the opening of the tapered portion are located on the same axis, and the optical fiber 5 is disposed in the second through hole of the reflective pad 8, so that the optical fiber 5 is fixed. The utility model discloses a water-cooling main part 1 is inside to be provided with reflection of light pad 8, and reflection of light pad 8 can be by but not limited to plate high anti-membrane or metal plating high anti-material by quartz and make, is provided with the second through hole in reflection of light pad 8 (the second through hole sets up in the center department of reflection of light pad 8 usually), and optic fibre 5 can pass from the second through hole, can reflect the laser that gets into the inside of output head on the one hand, avoids laser to cause the damage to the device of optic fibre fixed part 6 side; on the other hand, the optical fiber 5, the quartz end cap 3 and the fusion point can be kept on the same straight line. In addition, the fused joint that quartz end cap 3 corresponds and the 5 claddings surfaces of optic fibre between the reflection of light pad 8 adopt the texturing processing, make to get into quartz end cap 3's part is returned the light and is stripped and absorbed by water-cooling main part 1 to prevent that optic fibre 5 from blowing.

The utility model fixes the quartz end cap 3 and the optical fiber 5 at the tail end in a mechanical way, avoids the fracture of the optical fiber 5 in a texturing area caused by the stress of glue on the optical fiber 5 in the long-term application process, and improves the reliability of the laser output head in various complex application environments; meanwhile, due to the non-gelling design, the risk of heat accumulation in the laser output head and even the risk of burning out the optical fiber under the action of Gao Huifan light is reduced, and the tolerance of returned light is improved; the utility model can improve the manufacturing efficiency of the laser output head through mechanical fixation, and is convenient for subsequent disassembly and repair; additionally, the utility model discloses utilize closely to cooperate between window piece fixed cover 4 and the water-cooling main part 1 of taking slot 13, realize the locking to quartz end cap 3, form the auto-lock structure, the mode is more direct effective, and easily realizes on the QBH output, simultaneously the utility model discloses a mode possesses higher reliability, locking structure non-deformable in long-term use, and fastening force is strong, does not basically receive the influence of vibration environment.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A non-glue QBH laser output head is characterized by comprising a water-cooling main body (1), a conical groove (2), a quartz end cap (3), a window sheet fixing cover (4), an optical fiber (5) and an optical fiber fixing component (6);

the inner wall of the water-cooling main body (1) rotatably extends along the direction perpendicular to the installation direction of the optical fiber (5) to form a first cavity (11) with two open ends, one end of the first cavity (11) is provided with a conical groove (2) with two open ends, the quartz end cap (3) is arranged in the conical groove (2), and the optical fiber fixing component (6) is in threaded connection with the other end of the first cavity (11);

the optical fiber fixing part (6) is provided with a first through hole (64) along the axial direction of the optical fiber (5), the optical fiber fixing part (6) is provided with a nut (61) and a mounting hole (62) which is provided with a first internal thread and is vertical to the axial preset depth of the optical fiber (5); the cross section of the first through hole (64) is intersected with the bottom of the mounting hole (62), a groove (65) for accommodating an optical fiber is formed at the bottom of the mounting hole (62), one end of the optical fiber (5) is connected with the quartz end cap (3) through an opening of the conical groove (2), the other end of the optical fiber (5) is inserted into the first through hole (64) and placed in the groove (65), the nut (61) is provided with a first external thread which is matched with the first internal thread, and the nut (61) is screwed into the mounting hole (62) until being abutted against the optical fiber (5) so as to fix the optical fiber (5) and the optical fiber fixing component (6);

the inside of window piece fixed cover (4) is provided with the second internal thread, be provided with the second external thread on water-cooling main part (1) is close to the outer wall of quartz end cap (3) side, and, be provided with two at least slot (13) on the second external thread, the axial setting of optic fibre (5) is followed in slot (13), in order to incite somebody to action the second external thread falls into at least two sections, the material of second external thread compares the internal screw thread material of second is soft, so that window piece fixed cover (4) with water-cooling main part (1) outer wall is fixed and forms self-locking structure.

2. The non-gelatinized QBH laser output head according to claim 1, further comprising an outer shell (7), wherein the outer shell (7) is sleeved on the outer wall of the water-cooled main body (1) to form a sealed second cavity (12), so as to introduce cooling water to cool the optical fiber (5).

3. The non-glue QBH laser output head according to claim 2, characterized in that the outer housing (7) is provided with a first opening (71) and a second opening (72), cooling water entering from the first opening (71) and exiting from the second opening (72) in order to cool the inner optical fiber (5).

4. The non-gelling QBH laser output head according to claim 2, wherein the water-cooled body (1) and the outer shell (7) are made of high thermal conductivity material to facilitate heat conduction.

5. The non-gluing QBH laser output head according to any of claims 1-4, characterized in that the end of the window sheet fixing cover (4) is provided with a window sheet (41), the window sheet (41) is a quartz sheet plated with an antireflection film, the diameter of the window sheet (41) is larger than that of the quartz end cap (3), and the quartz end cap (3) is arranged in the space formed by the window sheet (41) and the window sheet fixing cover (4) so as to protect the quartz end cap (3).

6. The non-gelatinized QBH laser output head according to any of the claims 1 to 4, characterized in that the tapered groove (2) comprises a tapered part, the tapered part of the tapered groove (2) is arranged in the first cavity (11), the quartz end cap (3) is matched in shape and size with the tapered groove (2), and the tapered end of the quartz end cap (3) is inserted into the tapered groove (2) to abut against the tapered part of the tapered groove (2) so as to facilitate the quartz end cap (3) to conduct heat to the water-cooled body.

7. The non-glue QBH laser output head according to claim 6, characterized in that a reflective pad (8) is arranged in the first cavity (11) perpendicularly to the axial direction of the optical fiber (5), the reflective pad (8) is provided with a second through hole along the axial direction of the optical fiber (5), the first through hole (64), the second through hole and the opening of the conical part are on the same axis, and the optical fiber (5) is arranged in the second through hole of the reflective pad (8) so as to fix the optical fiber (5).

8. The non-glue QBH laser output head according to claim 7, characterized in that the surface of the cladding of the optical fiber (5) between the corresponding welding point of the quartz end cap (3) and the reflecting pad (8) is roughened, so that part of the return light entering the quartz end cap (3) is stripped and absorbed by the water-cooled body (1) to prevent the optical fiber (5) from being blown.

9. The non-gelatinized QBH laser output head according to any of claims 1 to 4, wherein a cushion (63) is provided in the mounting hole (62), and the cushion (63) is rested on the optical fiber (5) in the mounting hole (62) to avoid the nut (61) from damaging the optical fiber (5).

10. The non-gelatinized QBH laser output head according to any of claims 1-4, characterized in that the inner wall of the water-cooled body (1) is provided with threads to increase the heat dissipation area and absorb the internally scattered laser light.