CN220421102U - Variable facula fiber laser - Google Patents

Abstract

The utility model relates to a variable light spot fiber laser, which comprises a laser main body, a periodic annular mode scrambler and a connector, wherein the front end of the periodic annular mode scrambler is welded with the laser main body, and the rear end of the periodic annular mode scrambler is welded with the connector. The periodic annular mode scrambler comprises an annular periodic elastic sheet and a control device, and the optical fiber is arranged on the annular periodic elastic sheet; the annular periodic spring plate comprises a plurality of spring plate sections which are equal in length and are connected in sequence, each spring plate section is of the same period of one waveform, each spring plate section is connected with the control device, and the control device can control the amplitude of each spring plate section to synchronously change. The periodic amplitude in the periodic annular mode scrambler is changed, so that the laser outputs various light spot modes such as Gaussian light spots, flat-top light spots, annular light spots and the like, and the laser is suitable for various working conditions such as cutting, welding, cleaning and the like. Through the annular structural design of the periodic annular mode scrambler, the layout of the laser is optimized, the space use is more reasonable, and the size of the whole machine is reduced.

Description

Variable facula fiber laser

Technical Field

The utility model relates to the technical field of optical fibers, in particular to a variable-facula optical fiber laser.

Background

The laser cutting and welding of materials with different plate thicknesses have great relation with the size of light spots and the energy distribution. In the prior art, the optical spot mode output by the fiber laser is single, and good effect cannot be obtained under different use conditions.

Aiming at the defects in the prior art, the patent provides a variable-facula optical fiber laser. According to the principle that macrobending of an optical fiber can cause mutual coupling of internal modes of the optical fiber, a mechanical structure device capable of automatically adjusting the bending period and amplitude of an energy transmission optical fiber is designed so as to change the size and energy distribution of an output light spot of a laser, and the laser can adapt to various working conditions such as cutting, welding, cleaning and the like.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned drawbacks and shortcomings of the prior art, the present utility model provides a variable spot fiber laser, which solves the technical problem of single spot mode output by the fiber laser.

(II) technical scheme

In order to achieve the above object, the variable spot fiber laser of the present utility model includes a laser body, a periodic ring-type mode scrambler, and a connector;

the front end of the periodic annular mode scrambler is welded with the laser main body, and the rear end of the periodic annular mode scrambler is welded with the connector;

the periodic annular mode scrambler comprises an annular periodic elastic sheet and a control device, and an optical fiber is arranged on the annular periodic elastic sheet; the annular periodic shrapnel comprises a plurality of shrapnel sections with equal length and connected in sequence, each shrapnel section is a period with the same waveform, each shrapnel section is connected with the control device, and the control device can control the amplitude synchronous change of each shrapnel section.

Optionally, the control device comprises a driving mechanism, a plurality of active compression rollers and a plurality of passive compression rollers;

the active compression rollers and the passive compression rollers are uniformly arranged in a circular shape, one passive compression roller is arranged between any two active compression rollers, and the distance from the active compression roller to the circle center is smaller than that from the passive compression roller to the circle center;

the annular periodic elastic sheet is sleeved on the plurality of active compression rollers and the plurality of passive compression rollers, the plurality of active compression rollers are all abutted with the outer wall of the annular periodic elastic sheet, and the plurality of passive compression rollers are all abutted with the inner wall of the annular periodic elastic sheet;

the driving compression rollers are connected with the driving mechanism, and the driving mechanism can drive the driving compression rollers to synchronously move along the radial direction.

Optionally, the control device further comprises a disc-shaped fixed guide plate, wherein a plurality of sliding grooves distributed along the radial direction are uniformly formed in the fixed guide plate, and the driving compression roller and the driven compression roller are respectively in one-to-one sliding connection with the sliding grooves.

Optionally, the actuating mechanism includes driving disk and many pull rods, the driving disk with fixed deflector coaxial rotation is connected, many the first end of pull rod all with the articulated of driving disk, a plurality of pin joints are followed the circumference of driving disk evenly sets up, many the second end of pull rod respectively with a plurality of initiative compression roller one-to-one articulates.

Optionally, the driving mechanism further comprises a driving motor and a speed reducer, the driving motor is arranged on the fixed guide plate through the speed reducer, and a rotating shaft of the driving motor is connected with the driving disc through the speed reducer.

Optionally, the control device further comprises a disc-shaped sliding guide plate, and the sliding guide plate is coaxially and rotatably connected with the fixed guide plate;

the sliding guide plate is uniformly provided with oblique long round grooves with the same number as that of the sliding grooves, the oblique long round grooves are partially overlapped with the sliding grooves, one end of the passive compression roller is in sliding connection with the oblique long round grooves, and the other end of the passive compression roller is in sliding connection with the sliding grooves.

Optionally, the number of the active compression roller and the passive compression roller is 8.

Optionally, the periodic annular mode scrambler further includes an optical fiber sheath, the optical fiber sheath is disposed on the annular periodic elastic sheet, and the optical fiber is disposed in the optical fiber sheath.

Optionally, a square groove is formed in the optical fiber sheath, and the optical fiber sheath is clamped on the end face of the annular periodic elastic sheet through the square groove.

Optionally, a round hole is formed in the optical fiber sheath along the length direction, and the optical fiber is arranged in the round hole.

(III) beneficial effects

The laser can output various light spot modes such as Gaussian light spots, flat-top light spots, annular light spots and the like by changing the number and the amplitude of the periods in the periodic annular mode scrambler, so that the laser can adapt to various working conditions such as cutting, welding, cleaning and the like. Through the annular structural design of the periodic annular mode scrambler, the layout of the laser is optimized, the space use is more reasonable, and the size of the whole machine is reduced.

Drawings

FIG. 1 is a schematic diagram of the optical principle of a variable spot fiber laser according to the present utility model;

FIG. 2 is a right side view of a periodic ring mode scrambler of the variable spot fiber laser of the present utility model;

FIG. 3 is a front view of a periodic ring mode scrambler of a variable spot fiber laser of the present utility model;

fig. 4 is a left side view of a periodic ring mode scrambler of a variable spot fiber laser of the present utility model.

[ reference numerals description ]

1: a laser body; 2: a periodic ring mode scrambler; 3: a connector; 4: fixing a guide plate; 5: an active compression roller; 6: a drive plate; 7: a passive compression roller; 8: a pull rod; 9: an annular periodic spring plate; 10: an optical fiber sheath; 11: sliding the guide plate; 12: a speed reducer; 13: and driving the motor.

Detailed Description

The utility model will be better explained for understanding by referring to the following detailed description of the embodiments in conjunction with the accompanying drawings. Wherein references herein to "upper", "lower", "etc. are made with reference to the orientation of fig. 3.

While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

As shown in fig. 1 to 4, the present utility model provides a variable spot optical fiber laser, which includes a laser body 1, a periodic ring-shaped mode scrambler 2, and a connector 3, wherein a front end of the periodic ring-shaped mode scrambler 2 is welded to the laser body 1, and a rear end of the periodic ring-shaped mode scrambler 2 is welded to the connector 3. The periodic annular mode scrambler 2 adjusts the bending period and amplitude of the energy transmission optical fiber through a mechanical structure device according to the principle that the macrobending of the optical fiber can cause the mutual coupling of the internal modes of the optical fiber so as to change the size of the output light spot and the energy distribution of the laser, so that the laser can adapt to various working conditions such as cutting, welding, cleaning and the like. The periodic annular mode scrambler 2 comprises an annular periodic elastic sheet 9 and a control device, and the optical fiber is arranged on the annular periodic elastic sheet 9. The annular periodic elastic sheet 9 is divided into a plurality of elastic sheet sections with equal length and sequentially connected, the shape of each elastic sheet section is the same period of one waveform in one section of waveform, namely, the annular periodic elastic sheet 9 is equally divided into a plurality of parts according to requirements, each part is one period, each period is internally provided with a wave crest and a wave trough, and the height difference is the amplitude. Each bullet section is connected with a control device, and the control device can control the amplitude of each bullet section to synchronously change. The laser can output various light spot modes such as Gaussian light spots, flat-top light spots, annular light spots and the like by changing the number and the amplitude of the periods in the periodic annular mode scrambler 2, so that the laser can adapt to various working conditions such as cutting, welding, cleaning and the like. Through the annular structural design of the periodic annular mode scrambler 2, the layout of the laser is optimized, the space use is more reasonable, and the size of the whole machine is reduced.

As shown in fig. 2, the control device includes a driving mechanism, a plurality of active compression rollers 5, and a plurality of passive compression rollers 7. Wherein, the quantity of initiative compression roller 5 and passive compression roller 7 equals, and a plurality of initiative compression roller 5 and a plurality of passive compression roller 7 all are circular evenly setting to all be provided with a passive compression roller 7 between arbitrary two initiative compression roller 5, initiative compression roller 5 and passive compression roller 7 interval sets gradually. The distance between the driving compression roller 5 and the center of the circle is smaller than that between the driven compression roller 7 and the center of the circle, the annular periodic elastic sheet 9 is sleeved on the driving compression rollers 5 and the driven compression rollers 7, the driving compression rollers 5 are abutted with the outer walls of the annular periodic elastic sheet 9, and the driven compression rollers 7 are abutted with the inner walls of the annular periodic elastic sheet 9. The position of the active compression roller 5, which is abutted against the annular periodic elastic sheet 9, is located at the trough, and the position of the passive compression roller 7, which is abutted against the annular periodic elastic sheet 9, is located at the crest. The plurality of active compression rollers 5 are each connected to a driving mechanism capable of driving the plurality of active compression rollers 5 to move synchronously in the radial direction. When the driving mechanism drives the plurality of active compression rollers 5 to synchronously move towards the direction of the circle center, as the line length of the annular periodic elastic sheet 9 is fixed, when the trough is contracted inwards, the wave crest drives the passive compression roller 7 to move, so that the amplitude of each period synchronously increases, otherwise, the annular periodic elastic sheet 9 drives the passive compression roller 7 to move towards the direction away from the circle center under the action of internal stress, and the amplitude is reduced.

Further, the control device further comprises a disc-shaped fixed guide plate 4, the fixed guide plate 4 is a supporting part of all parts, a plurality of sliding grooves which are equal in length and distributed along the radial direction are uniformly formed in the fixed guide plate 4, and the sliding grooves are straight long round grooves. The annular periodic elastic sheet 9 is of annular design, the annular periodic elastic sheet 9 is divided into a plurality of periods by taking the axle center of the fixed guide plate 4 as a reference, and the waveform and the amplitude of each period are the same. The wave crest is abutted and fixed by the passive compression roller 7, and the wave trough is abutted and fixed by the active compression roller 5. In one embodiment, the number of the active compression roller 5 and the passive compression roller 7 is 8, that is, the number of the sliding grooves is 16, and the annular periodic spring 9 is divided into 8 periods. The driving compression rollers 5 and the driven compression rollers 7 are respectively in one-to-one corresponding sliding connection with the sliding grooves, the driving compression rollers 5 are driven to slide along the sliding grooves through the driving mechanism, and the driven compression rollers 7 are driven to synchronously move through the annular periodic elastic sheets 9.

Specifically, referring to fig. 2, the driving mechanism includes a driving disc 6 and a plurality of tie rods 8, the driving disc 6 is coaxially and rotatably connected with the fixed guide plate 4, a circular boss is arranged at the lower part of the driving disc 6, the outer surface of the circular boss is mounted in cooperation with the inner surface of the fixed guide plate 4, the driving disc 6 rotates by taking the center of the fixed guide plate 4 as an axis, and the driving disc 6 is a driving disc and is driven to rotate by a power source. The first ends of the pull rods 8 are hinged with the driving disc 6, a plurality of hinge points are uniformly arranged along the circumference of the driving disc 6, and the second ends of the pull rods 8 are hinged with the driving compression rollers 5 in a one-to-one correspondence mode. When the driving disc 6 rotates around the axis of the fixed guide plate 4 in the first rotation direction, the driving compression roller 5 is driven by the pull rod 8 to slide in the chute to the circle center, so that the annular periodic elastic sheet 9 is driven to shrink. When the driving disc 6 rotates around the axis of the fixed guide plate 4 in the second rotation direction, the active compression roller 5 slides in the chute in a direction away from the center of the circle, the annular periodic elastic sheet 9 drives the passive compression roller 7 to synchronously slide along the chute in a direction away from the center of the circle under the action of internal stress, and the amplitude of each period synchronously reduces.

As shown in fig. 3, the driving disc 6 is driven by a combination of a driving motor 13 and a speed reducer 12, wherein the driving motor 13 is arranged on the fixed guide plate 4 through the speed reducer 12, a rotating shaft of the driving motor 13 is connected with the driving disc 6 through the speed reducer 12, and the driving disc 6 rotates around the axis of the fixed guide plate 4 after being decelerated by the speed reducer 12 under the driving of the driving motor 13. The present utility model is not limited to the assembly of the drive motor 13 and the speed reducer 12, but may be other driving forms such as pneumatic, electromagnetic driving, etc., as long as the drive disk 6 can be driven to rotate.

As shown in fig. 4, the control device further includes a disc-shaped sliding guide plate 11, a circular boss is provided on the bottom surface of the fixed guide plate 4, the outer edge of the circular boss is matched with the inner edge of the sliding guide plate 11, and the sliding guide plate 11 can rotate with the center of the fixed guide plate 4 as an axis. The sliding guide plate 11 is uniformly provided with the same number of inclined long round grooves as the sliding grooves, in a preferred embodiment, the number of the inclined long round grooves is equal to that of the passive compression rollers 7, the inclined long round grooves are partially overlapped with the sliding grooves, the passive compression rollers 7 are arranged at the parts of the inclined long round grooves and the sliding grooves, one ends of the passive compression rollers 7 are in sliding connection with the inclined long round grooves, and the other ends of the passive compression rollers are in sliding connection with the sliding grooves. The passive compression roller 7 is restrained to move synchronously due to the restraint of the inclined long round grooves on the slide guide plate 11, so that the amplitude of each cycle is changed synchronously.

As shown in fig. 2 and 3, the periodic ring mode scrambler 2 further includes an optical fiber jacket 10, where the optical fiber jacket 10 is made of a flexible material, and preferably, the optical fiber jacket 10 is made of polytetrafluoroethylene material and is formed by a plunger extrusion process. The optical fiber sheath 10 is arranged on the end face of the annular periodic elastic sheet 9, and the optical fiber sheath 10 deforms according to the shape of the annular periodic elastic sheet 9. The optical fiber is arranged in the optical fiber sheath 10, so that the optical fiber is in the shape of an annular periodic spring sheet 9, and when the amplitude of each period changes, the amplitude of the optical fiber in the optical fiber sheath 10 also changes, so that the laser outputs various spot modes such as Gaussian spots, flat-top spots, annular spots and the like, and the laser can adapt to various working conditions such as cutting, welding, cleaning and the like.

Preferably, a square groove is formed in the side wall of the optical fiber sheath 10, and the optical fiber sheath 10 is clamped on the end face of the annular periodic elastic sheet 9 through the square groove, or the optical fiber sheath 10 is directly adhered on the annular periodic elastic sheet 9. A circular hole is formed in the optical fiber sheath 10 along the length direction, and an optical fiber is arranged in the circular hole. Specifically, be provided with the diameter on the cross section of optical fiber sheath 10 and be 1.5mm round hole, optic fibre passes in the round hole, and optical fiber sheath 10 plays protection and shape control's effect to optic fibre, through the setting of the equidistant long elastic design of periodic ring type mode scrambler 2 and optical fiber sheath 10, promotes the stability of laser instrument.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims (10)

1. The variable-spot optical fiber laser is characterized by comprising a laser main body (1), a periodic annular mode scrambler (2) and a connector (3);

the front end of the periodic annular mode scrambler (2) is welded with the laser main body (1), and the rear end of the periodic annular mode scrambler (2) is welded with the connector (3);

the periodic annular mode scrambler (2) comprises an annular periodic elastic sheet (9) and a control device, and an optical fiber is arranged on the annular periodic elastic sheet (9); the annular periodic spring piece (9) comprises a plurality of spring piece sections with equal length and connected in sequence, each spring piece section is a period with the same waveform, each spring piece section is connected with the control device, and the control device can control the amplitude of each spring piece section to synchronously change.

2. A variable spot fiber laser as claimed in claim 1, characterized in that the control means comprises a drive mechanism, a plurality of active compression rollers (5) and a plurality of passive compression rollers (7);

the active compression rollers (5) and the passive compression rollers (7) are uniformly arranged in a circular shape, one passive compression roller (7) is arranged between any two active compression rollers (5), and the distance from the active compression roller (5) to the center of a circle is smaller than the distance from the passive compression roller (7) to the center of the circle;

the annular periodic elastic pieces (9) are sleeved on the plurality of active compression rollers (5) and the plurality of passive compression rollers (7), the plurality of active compression rollers (5) are abutted with the outer walls of the annular periodic elastic pieces (9), and the plurality of passive compression rollers (7) are abutted with the inner walls of the annular periodic elastic pieces (9);

the driving compression rollers (5) are connected with the driving mechanism, and the driving mechanism can drive the driving compression rollers (5) to synchronously move along the radial direction.

3. The variable-spot fiber laser according to claim 2, wherein the control device further comprises a disc-shaped fixed guide plate (4), a plurality of sliding grooves distributed in the radial direction are uniformly formed in the fixed guide plate (4), and the plurality of active compression rollers (5) and the plurality of passive compression rollers (7) are respectively in one-to-one sliding connection with the plurality of sliding grooves.

4. A variable spot optical fiber laser according to claim 3, wherein the driving mechanism comprises a driving disc (6) and a plurality of pull rods (8), the driving disc (6) is coaxially and rotatably connected with the fixed guide plate (4), first ends of the plurality of pull rods (8) are hinged with the driving disc (6), a plurality of hinging points are uniformly arranged along the circumference of the driving disc (6), and second ends of the plurality of pull rods (8) are hinged with the plurality of active compression rollers (5) in a one-to-one correspondence manner.

5. The variable-spot fiber laser according to claim 4, wherein the driving mechanism further comprises a driving motor (13) and a speed reducer (12), the driving motor (13) is disposed on the fixed guide plate (4) through the speed reducer (12), and a rotating shaft of the driving motor (13) is connected with the driving disc (6) through the speed reducer (12).

6. A variable spot fiber laser as claimed in claim 3, characterized in that the control means further comprises a sliding guide plate (11) having a disc shape, the sliding guide plate (11) being coaxially and rotatably connected to the fixed guide plate (4);

the sliding guide plates (11) are uniformly provided with inclined long round grooves with the same number as the sliding grooves, the inclined long round grooves are partially overlapped with the sliding grooves, one end of the driven compression roller (7) is in sliding connection with the inclined long round grooves, and the other end of the driven compression roller is in sliding connection with the sliding grooves.

7. A variable spot fiber laser according to claim 2, characterized in that the number of active compression rollers (5) and passive compression rollers (7) is 8.

8. The variable spot fiber laser according to any of the claims 1-7, wherein the periodic ring mode scrambler (2) further comprises a fiber jacket (10), the fiber jacket (10) being arranged on the ring period dome (9), the fiber being arranged in the fiber jacket (10).

9. The variable-spot fiber laser according to claim 8, wherein the fiber sheath (10) is provided with a square groove, and the fiber sheath (10) is clamped on the end face of the annular periodic elastic sheet (9) through the square groove.

10. The variable spot fiber laser of claim 8, wherein the fiber jacket (10) has a circular hole formed therein along a length direction, and the optical fiber is disposed in the circular hole.