阅读说明：本技术 一种模块化光纤激光头及激光设备 (Modularization optic fibre laser head and laser equipment ) 是由 赵敏华 段开椋 马宝田 于 2021-07-29 设计创作，主要内容包括：本发明涉及光纤激光头,具体涉及一种模块化光纤激光头及激光设备,以解决目前光纤激光头一体化设计导致损坏不可更换及不能适应应用场景变化的问题。该光纤激光头,包括激光发射模块、透镜系统模块以及设置在激光发射模块和透镜系统模块外部的冷却模块；所述激光发射模块的末端具有光纤固定腔,所述激光发射模块前端与透镜系统模块的末端可拆卸连接；透镜系统模块具有用于光斑整形的透镜；冷却模块与透镜系统模块、激光发射模块可拆卸连接。该激光设备包含所述模块化光纤激光头。本发明提供的光纤激光头采用模块化设计,并可拆卸的连接,方便更换,可以满足多种应用场景。(The invention relates to an optical fiber laser head, in particular to a modular optical fiber laser head and laser equipment, and aims to solve the problems that the existing optical fiber laser head is damaged and cannot be replaced and cannot adapt to application scene change due to integrated design. The optical fiber laser head comprises a laser emission module, a lens system module and a cooling module arranged outside the laser emission module and the lens system module; the tail end of the laser emission module is provided with an optical fiber fixing cavity, and the front end of the laser emission module is detachably connected with the tail end of the lens system module; the lens system module is provided with a lens for spot shaping; the cooling module is detachably connected with the lens system module and the laser emission module. The laser equipment comprises the modular fiber laser head. The optical fiber laser head provided by the invention adopts a modular design, is detachably connected, is convenient to replace, and can meet various application scenes.)

1. A modular fiber laser head characterized by: the device comprises a laser emission module (2), a lens system module (1) and a cooling module (3) arranged outside the laser emission module (2) and the lens system module (1);

the tail end of the laser emission module (2) is provided with an optical fiber fixing cavity (12), and the front end of the laser emission module (2) is detachably connected with the tail end of the lens system module (1); the lens system module (1) is provided with a plurality of lenses for spot shaping; the cooling module (3) is detachably connected with the lens system module (1) and the laser emission module (2).

2. The modular fiber laser head of claim 1 wherein:

the front end of the laser emission module (2) is provided with a connecting cavity communicated with the optical fiber fixing cavity (12); the laser emission module (2) further comprises a plano mirror (13) fixed in the connecting cavity.

3. The modular fiber laser head of claim 2 wherein: the lens system module (1) is provided with a protective lens cavity and a lens cavity (4) positioned behind the protective lens cavity;

the lens system module (1) is provided with a protective lens (6) in a protective lens cavity, and a plurality of light spot shaping lenses are arranged in the lens cavity (4).

4. The modular fiber laser head of claim 3 wherein:

a space ring is arranged between every two adjacent spot shaping lenses; the spot shaping lenses are accommodated in the lens cavity (4) in a replaceable manner.

5. The modular fiber laser head of claim 1 wherein:

the front end of the laser emission module (2) is provided with an external thread (9); the rear end of the lens system module (1) is provided with an internal thread (8) matched with the external thread (9).

6. The modular fiber laser head of claim 5 wherein: the length of the internal thread (8) is greater than the length of the external thread (9).

7. The modular fiber laser head of any one of claims 1 to 6 wherein:

a sealing groove is formed in the joint of the outer side of the laser emission module (2) and the lens system module (1), and the sealing groove is located on the rear side of the external thread (9); and a third sealing ring (11) is arranged in the sealing groove and used for sealing between the laser emission module (2) and the lens system module (1).

8. The modular fiber laser head of claim 7 wherein:

the rear end of the lens system module (1) is provided with a plurality of fastening screw holes (10) along the radial direction, and each fastening screw hole (10) is positioned behind the internal thread (8); and fastening bolts are arranged in the fastening screw holes (10) and used for abutting against the outer side surface of the laser emission module (2) to fixedly lock the lens system module (1) and the laser emission module (2).

9. The modular fiber laser head of claim 8 wherein:

the cooling module (3) comprises a sleeve, a first sealing ring (17) and a second sealing ring (16);

the sleeve is sleeved on the laser emission module (2) and the lens system module (1); the sleeve has a water inlet (15) and a water outlet (14);

the laser emission module (2) is connected with the sleeve in a sealing mode through a first sealing ring (17); the lens system module (1) is connected with the sleeve in a sealing mode through a second sealing ring (16).

10. A laser apparatus characterized by: including the optical fiber laser head of any one of claims 1 to 9.

Technical Field

The invention relates to an optical fiber laser head, in particular to a modular optical fiber laser head and laser equipment.

Background

With the wide application of fiber lasers in the fields of metal surface modification, metal welding, metal plate cutting and the like in recent years, people put higher requirements on the performance and the working stability of the fiber lasers.

The optical fiber laser generally comprises an optical module and an electric module, wherein the optical module mainly comprises a laser generator and an optical fiber laser head. As an important component of the fiber laser, the fiber laser head generally consists of two parts, namely an optical lens barrel and a fiber positioner, and is used for shaping and outputting laser. An optical lens combination system is arranged in the optical lens barrel to realize the shaping of laser spots; the optical fiber positioner is mainly used for positioning and fixing the optical fiber. Whole optic fibre laser head is in the output end, receives external adverse factor's influence most easily, all can produce different degree to it including ambient temperature, humidity and cleanliness factor and influence or even damage, seriously influences the job stabilization nature of fiber laser.

At present, the optical fiber laser head generally adopts integrated design and manufacture, and the inside relevant parts of optical fiber laser head all adopt disposable whole encapsulation, do not support the dismouting reorganization, in case the optical fiber laser head appears polluting or impaired, need change whole optical fiber laser head, and it is with high costs after sale. Moreover, the optical fiber laser head also has strong dependence on the use scene, and the optical fiber laser heads of different models are customized according to the specific customer requirements in different use scenes. The optical fiber laser head of current integral type structure can't satisfy multi-scene user demand, if customer's user demand changes, just needs the optical fiber laser head of whole change different models. Therefore, the whole optical fiber laser head needs to be replaced when the optical fiber laser head is in failure or the requirement of a customer changes.

Therefore, it is necessary to design a modular optical fiber laser head which can satisfy multi-scenario applications and support the removal and replacement of damaged parts.

Disclosure of Invention

The invention aims to solve the problems that an optical fiber laser head component is damaged due to the integrated design of the existing optical fiber laser head and needs to be integrally replaced when an application scene is changed, and provides a modular optical fiber laser head and laser equipment.

The technical scheme of the invention is as follows:

the invention provides a modularized optical fiber laser head, which is characterized in that: the cooling module is arranged outside the laser emitting module and the lens system module;

the tail end of the laser emission module is provided with an optical fiber fixing cavity, and the front end of the laser emission module is detachably connected with the tail end of the lens system module; the lens system module is provided with a plurality of lenses for spot shaping; the cooling module is detachably connected with the lens system module and the laser emission module.

Furthermore, a connecting cavity communicated with the optical fiber fixing cavity is arranged at the front end of the laser emission module; the laser emission module further comprises a plano mirror fixed in the connecting cavity.

The flat mirror functions to prevent the end face of the optical fiber from being contaminated.

Further, the lens system module is provided with a protective lens cavity and a lens cavity positioned behind the protective lens cavity;

the lens system module is provided with a protective lens in a protective lens cavity, and a plurality of light spot shaping lenses are arranged in the lens cavity.

Furthermore, a space ring is arranged between two adjacent spot shaping lenses; and the spot shaping lenses are accommodated in the lens cavities in a replaceable manner.

The space ring is used for isolating and fixing the light spot shaping lens, and the light spot shaping lens is arranged in the lens cavity in an interchangeable mode, so that different light spot shaping lenses can be conveniently replaced according to actual use scenes.

Furthermore, the front end of the laser emission module is provided with an external thread; and the rear end of the lens system module is provided with an internal thread matched with the external thread.

Further, the length of the internal thread is greater than the length of the external thread.

Through the design that the length of the internal thread is greater than the length of the external thread, the distance between the end face of the optical fiber and the collimating focusing lens can be finely adjusted in a thread screwing mode, so that light spots passing through the collimating focusing lens are collimating focusing light spots.

Furthermore, a sealing groove is formed at the joint of the outer side of the laser emission module and the lens system module, and the sealing groove is positioned on the rear side of the external thread; and a third sealing ring is arranged in the sealing groove and used for sealing between the laser emission module and the lens system module.

Furthermore, a plurality of fastening screw holes are radially formed in the rear end of the lens system module, and each fastening screw hole is positioned behind the internal thread;

and fastening bolts matched with the fastening screw holes one by one are arranged in the fastening screw holes. The fastening bolt is abutted against the outer side face of the laser emission module and used for fixing and locking the lens system module and the laser emission module.

Further, the cooling module comprises a sleeve, a first sealing ring and a second sealing ring;

the sleeve is sleeved on the laser emission module and the lens system module; the sleeve is provided with a water inlet and a water outlet;

the laser emission module is connected with the sleeve in a sealing mode through a first sealing ring; and the lens system module is connected with the sleeve in a sealing way through a second sealing ring.

The invention also provides laser equipment, which is characterized in that: the optical fiber laser head comprises the optical fiber laser head.

The invention has the beneficial effects that:

the invention adopts the modularized design of the laser emission module, the lens system module and the cooling module, all the modules are detachably connected, and the shaping lens in the lens system module can be provided with different numbers of facula shaping lenses according to the actual requirement, so that the optical fiber laser head can meet various application scenes; when one of the modules of the optical fiber laser head is damaged, only the damaged module needs to be replaced, the after-sale efficiency is greatly improved, and the cost is reduced.

The laser equipment adopting the optical fiber laser head provided by the invention also has the advantages of rich applicable scenes and convenient replacement of the optical fiber laser head module.

Drawings

FIG. 1 is a schematic view of a lens system module and a laser emission module connecting structure in a modular fiber laser head according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a modular structure of a lens system in the modular fiber laser head according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an embodiment of a laser emitting module structure in the modular fiber laser head according to the present invention;

fig. 4 is a schematic view of a cooling module structure in the modular fiber laser head according to an embodiment of the present invention.

The drawings illustrate the following:

1-lens system module, 2-laser emission module, 3-cooling module, 4-lens cavity, 5-spherical plug, 6-protective lens, 7-plug, 8-internal thread, 9-external thread, 10-fastening screw hole, 11-third sealing ring, 12-optical fiber fixing cavity, 13-plano mirror, 14-water outlet, 15-water inlet, 16-second sealing ring and 17-first sealing ring.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, the present embodiment provides a modular fiber laser head including a laser emitting module 2, a lens system module 1 and a cooling module 3; according to the laser transmission direction, setting the end of the lens system module 1 as the front and the end of the laser emission module 2 as the back;

the tail end of the laser emission module 2 is provided with an optical fiber fixing cavity 12, and the front end of the laser emission module 2 is provided with a connecting cavity communicated with the optical fiber fixing cavity 12; a plano-plano mirror mounting clamping groove for mounting a plano-plano mirror is arranged in the connecting cavity; the optical fiber fixing cavity 12 is used for positioning and fixing an optical fiber, and the flat mirror 13 can prevent the end face of the optical fiber from being polluted; the optical fiber holder constituting the optical fiber fixing cavity 12 is manufactured by using metal copper with excellent heat dissipation performance as a substrate.

The lens system module 1 is provided with a protective lens cavity and a lens cavity 4 behind the protective lens cavity, and the lens cavity 4 is used for installing a light spot shaping lens; the number of the light spot shaping lenses is multiple, and a space ring is arranged between every two adjacent light spot shaping lenses; the spot-shaping lens is replaceably accommodated in the lens cavity 4.

In the embodiment, a phi 25 biconcave spherical mirror is arranged at the lens mounting position in the lens cavity 4, then a positioning space ring is arranged, and the phi 25 biconcave spherical mirror is arranged on the space ring and shapes laser spots into collimation spots through the two optical lenses; and a second space ring is arranged on the double convex spherical mirror, then the f-280 focusing mirror is arranged on the space ring, and then the spherical plug 5 with threads is arranged to fix the collimating focusing lens. A protective lens 6 is arranged in the protective lens cavity and is fixed by a plug 7.

In other embodiments, the number of spot-shaping lens arrangements may be increased or decreased as desired.

The front end of the laser emission module 2 is provided with an external thread 9; the rear end of the lens system module 1 is provided with an internal thread 8 matched with the external thread 9; the length of the internal thread 8 is greater than the length of the external thread 9.

A plurality of fastening screw holes 10 are provided at the rear end of the lens system module 1, and each of the fastening screw holes 10 is located behind the internal thread 8.

The optical fiber laser head further includes fastening bolts fitted one by one to the respective fastening screw holes 10. The fastening bolt is abutted against the outer side surface of the laser emission module 2.

The lens system module 1 and the laser emission module 2 are connected through threads, the distance between the end face of the optical fiber and the collimating focusing lens is finely adjusted in a thread screwing mode, so that light spots passing through the collimating focusing lens are collimated focusing light spots, and fastening bolts are inserted into the fastening screw holes 10 to be locked and fixed after adjustment.

In this embodiment, the lens system module 1 is provided with an internal thread 8, and the length of the internal thread 8 is 25 mm; the laser emission module 2 is provided with external threads 9, the length of the threads is 15mm, and the laser emission module and the threads are connected through the threads. Four fastening screw holes 10 distributed along the radial circumference are arranged at 12mm positions at the rear end of the thread 8 of the lens system module 1; a third sealing ring 11 is arranged 5mm behind the thread 9 of the laser emission module 2, and the third sealing ring 11 is arranged in a sealing groove which is positioned at the rear side of the external thread 9; the rear end of the lens system module 1 is pressed on the third sealing ring 11 to ensure the sealing performance of the joint of the lens system module 1 and the laser emission module 2.

The cooling module is sleeved outside the connecting body of the lens system module 1 and the laser emission module 2 for heat dissipation so as to prevent the optical fiber laser head from being overheated in the use process.

The cooling module 3 comprises a sleeve, a first sealing ring 17 and a second sealing ring 16;

the sleeve is detachably sleeved on the laser emission module 2 and the lens system module 1; the sleeve has a water inlet 15 and a water outlet 14; the laser emission module 2 is hermetically connected with the sleeve through a first sealing ring 17; the lens system module 1 is connected with the sleeve in a sealing way through a second sealing ring 16.

The invention also discloses laser equipment which comprises any one of the optical fiber laser heads described in the embodiment of the modular optical fiber laser head. The laser device may be a laser welding device, a laser cutting device, or other type of laser device. Since the laser device has any one of the optical fiber laser heads described in the above embodiments of the optical fiber laser head, the same advantageous effects are obtained, and the description of the present invention is omitted here.