CN217045057U

CN217045057U - Automatic focusing cutting head

Info

Publication number: CN217045057U
Application number: CN202123362954.1U
Authority: CN
Inventors: 何天助; 陈文军
Original assignee: Shenzhen Ruifa Intelligent Technology Co ltd
Current assignee: Shenzhen Ruifa Intelligent Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-07-26
Anticipated expiration: 2031-12-29

Abstract

The utility model belongs to the field of laser cutting, in particular to an automatic focusing cutting head, which comprises a main body, a fiber laser interface module, a collimating lens module, a focusing lens module and a nozzle, wherein the fiber laser interface module, the collimating lens module, the focusing lens module and the nozzle are sequentially arranged on the main body from top to bottom; a collimating lens is arranged in the collimating lens module, and a focusing lens is arranged in the focusing lens module; the main body is internally provided with a light path channel; the focusing lens module comprises a focusing lens barrel, a focusing lens is arranged in the focusing lens barrel, the focusing lens barrel is movably arranged in a light path channel of the main body, a motor focusing driving assembly is fixedly arranged on one side of the main body, and the motor focusing driving assembly is in driving connection with the focusing lens barrel so as to drive the focusing lens barrel to move up and down in the light path channel. Compared with the prior manual driving focusing, the utility model can ensure the precision of each focusing; and the labor cost is lower, and the efficiency is higher.

Description

Automatic focusing cutting head

Technical Field

The utility model belongs to the laser cutting field, in particular to laser cutting head.

Background

Laser cutting is to focus laser emitted from a laser into a laser beam with high power density through an optical path system. The laser beam irradiates the surface of the workpiece to make the workpiece reach a melting point or a boiling point, and simultaneously, the high-pressure gas coaxial with the laser beam blows away the molten or gasified metal. And finally, the material is cut along with the movement of the relative position of the light beam and the workpiece, so that the cutting purpose is achieved. Wherein the laser cutting head functions to focus the laser beam so that the laser beam impinges on the surface of the workpiece.

The existing cutting head for laser cutting adjusts the focal length by adjusting the height of a focusing lens, so as to adjust the positive and negative values of the focal point; however, the existing focusing knobs of the focusing lens are mostly adopted for manual adjustment, but the precision of the manual adjustment is influenced by the experience of workers, and the qualification of the precision of each adjustment cannot be ensured; moreover, the labor cost is higher, and the efficiency is lower. The laser cutting head of five 3D laser cutting machine of three-dimensional (application number is CN202011587714.9) as the comparison document who applies earlier, including laser cutting head body, protective cover board, nozzle body and sealing baffle, focusing mirror focus knob is installed to the bolt on the laser cutting head body, and rotates on the laser cutting head body and be connected with the fixed axle, swing joint has sealing baffle on the sliding plate, and the bolt has the connecting wire on the sealing baffle to the top bolt of connecting wire is on the laser cutting head body, the last screw connection of sealing baffle has the rubber rope, and the top screw connection of rubber rope is on the sliding plate. The comparison document has the defects of the prior art.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model discloses a first-order aim at provides an automatic focusing cutting head, and this cutting head can carry out automatic focusing to guarantee the precision of focusing at every turn.

Another object of the utility model is to provide an automatic focusing cutting head, the lathe that uses this focusing head is when cutting, and the cost of labor is lower, and efficiency is higher.

In order to achieve the above object, the technical solution of the present invention is as follows.

An automatic focusing cutting head comprises a main body, a fiber laser interface module, a collimating lens module, a focusing lens module and a nozzle, wherein the fiber laser interface module, the collimating lens module, the focusing lens module and the nozzle are sequentially arranged on the main body from top to bottom; a collimating lens is arranged in the collimating lens module, and a focusing lens is arranged in the focusing lens module; the optical path channel is arranged in the main body, sequentially penetrates through the optical fiber laser interface module, the collimating lens module, the focusing lens module and the nozzle from top to bottom, and is positioned in the optical path channel; the focusing lens module is characterized by comprising a focusing lens barrel, the focusing lens is arranged in the focusing lens barrel, the focusing lens barrel is movably arranged in a light path channel of the main body, a motor focusing driving component for automatically controlling the focusing lens barrel to move in the light path channel is fixedly arranged on one side of the main body, and the motor focusing driving component is in driving connection with the focusing lens barrel so as to drive the focusing lens barrel to move up and down in the light path channel. The laser beam forms a focusing energy focus after passing through the focusing module; the focusing lens barrel can be driven by the motor focusing driving component to move up and down in the light path channel so as to adjust the height of the focusing lens, and then the positive and negative values of the focus can be adjusted to cut plates with different thicknesses and sizes. Compared with the existing manual driving focusing, the motor focusing driving assembly can ensure the precision of each focusing in an automatic driving mode; and the labor cost is lower, and the efficiency is higher.

Furthermore, a window cover plate is further arranged on the other side of the main body, a perspective plate is arranged on the window cover plate, and the perspective plate corresponds to the focusing lens barrel in position. The arrangement of the perspective plate can observe the focusing lens cone in real time and is used for assisting the focusing of the focusing lens cone.

Furthermore, the window cover plate is detachably arranged on the other side of the main body. By the design, the focusing lens barrel can be more conveniently assembled and disassembled.

Furthermore, the motor focusing driving assembly comprises a motor and a transmission assembly, the motor is fixedly arranged at one side of the main body, an output shaft of the motor is in driving connection with the transmission assembly, a driving through hole is formed in one side of the main body, and the driving through hole corresponds to the focusing lens barrel; the transmission assembly penetrates through the driving through hole to be connected with the focusing lens barrel, and the motor drives the focusing lens barrel to move up and down through the transmission assembly.

Furthermore, the transmission assembly comprises a nut seat and a connecting piece, the nut seat is movably sleeved on an output shaft of the motor, one end of the connecting piece is fixed on the nut seat, and the other end of the connecting piece penetrates through the driving through hole to be connected with the focusing lens barrel. Specifically, the output shaft of the motor is a threaded shaft, and the nut seat is driven to move when the motor rotates. Specifically, the other end of the connecting piece is connected with the focusing lens cone through a screw.

Further, a motor base is fixedly arranged on one side of the main body, the motor is fixedly arranged in the motor base, and the nut base is positioned in the motor base; all be formed with the direction cavity between the main part side at motor cabinet downside and drive through-hole both ends, the connecting piece lower extreme is fixed with the guide block, the guide block both ends are located two direction cavities respectively. The guide block and the guide cavities at the two ends of the guide block play a role in guiding when the motor drives the nut seat to move and further drives the connecting piece to move.

Furthermore, a guide rail structure is arranged between the nut seat and the motor seat, and the nut seat and the motor seat are movably connected through the guide rail structure. Due to the arrangement of the guide rail structure, the movement of the nut seat is smoother. The guide rail structure is prior art.

Furthermore, a first circulating cooling channel is arranged in the main body, a first water inlet and a first water outlet are also arranged on the main body, and the first water inlet and the first water outlet are communicated with the first circulating cooling channel. The arrangement of the first circulating cooling channel can cool the main body and prevent the temperature of the main body from being too high.

Further, the fiber laser interface module, the collimating lens module, the focusing lens module and the nozzle are sequentially detachably arranged on the main body from top to bottom. In this cutting head, through fiber laser interface module, collimation lens module, focus lens module, nozzle from top to bottom in proper order detachable setting in the main part for this cutting head dismouting of being convenient for more, production and processing are more convenient. And this cutting head is more convenient in the maintenance in later stage, change operations such as accessory. When the focusing lens module is dismounted, the window cover plate can be firstly dismounted from the main body; and then the focus lens barrel is removed from the coupling member.

In the cutting head, the fiber laser interface module is used for externally connecting and fixing a fiber laser, laser is emitted from the interior of an optical fiber, and the laser sequentially passes through a collimating lens in the collimating lens module and a focusing lens in the focusing lens module from the light path channel and then is emitted from a nozzle for cutting.

Further, still detachably be provided with collimation protection module on the main part, collimation protection module sets up between fiber laser interface module, collimation lens module, be provided with the collimation protection lens in the collimation protection module, the collimation protection lens is located the light path way, and the collimation protection lens is located collimation lens top. The side edge of the collimation protection lens is attached with a sealing ring. The arrangement of the collimation protection lens can prevent external dust from entering from the fiber laser interface module and falling on the collimation lens, so that the collimation lens is prevented from being polluted, and the sealed dustproof effect is achieved.

Further, still the detachable focus protection module that is provided with on the main part, focus protection module sets up between focus lens module, nozzle, be provided with the focus protection lens in the focus protection module, the focus protection lens is located the light path passageway, and the focus protection lens is located focus lens below. The side edge of the focusing protective lens is attached with a sealing ring. The arrangement of the focusing protection lens can prevent external dust from entering from the nozzle and falling on the focusing lens, thereby avoiding the pollution of the focusing lens and having the effect of sealing and dust prevention.

Furthermore, the main part side still detachably is provided with the temperature control circuit board, be provided with temperature sensor on the temperature control circuit board, the main part corresponds temperature sensor and is provided with the temperature measurement through-hole, temperature sensor passes through the temperature measurement through-hole and corresponds with focus protection lens. The temperature control circuit board and the focusing protection module are respectively arranged on two different side surfaces of the main body. The temperature sensor on the temperature control circuit board measures the temperature of the focusing protective lens in real time through the temperature measuring through hole, and the phenomenon that the temperature of the focusing protective lens is too high due to excessive dust accumulation on the focusing protective lens is avoided.

Furthermore, a temperature control display lamp module is further arranged on the main body and connected with the temperature control circuit board.

Furthermore, two focusing protection lenses are arranged in the focusing protection module, and are both positioned in the light path channel and below the focusing lenses. And the arrangement of the two focusing protective lenses ensures that the sealing and dustproof effects are better.

Further, the main part lower extreme still detachably is provided with the mount pad, the mount pad side is provided with the trachea interface, be provided with gas channel in the mount pad, gas channel one end and trachea interface switch-on, the gas channel other end runs through the switch-on to the light path passageway in. The trachea interface is used for introducing cutting auxiliary gas; after entering from the trachea interface, the cutting auxiliary gas enters the lower end of the optical path channel through the gas channel and is ejected from the nozzle together with the laser to assist the laser to work.

Furthermore, the side of the mounting seat is provided with an amplifier interface for externally connecting an external heightening device. The mounting seat is provided with a sensor, and the sensor is connected with the amplifier interface. The amplifier interface is externally connected with a signal amplifier, and the external signal amplifier is connected with an external heightening device; and acquiring the height between the nozzle and the working surface so that the height of the cutting head can be adjusted according to different heights of the processing surface when the external machine tool performs laser cutting. The height adjustment principle of the external height adjuster is the prior art.

Furthermore, this cutting head still includes the lock sleeve, the fixed ceramic body that is provided with in nozzle upper end, the detachable activity of lock sleeve cup joints at the mount pad lower extreme, just the ceramic body and lock sleeve swing joint, the lock sleeve is movable on the mount pad so that the ceramic body locking breaks away from on the mount pad or from the mount pad. The lock sleeve can be sleeved at the lower end of the mounting seat through threads. The ceramic body has insulating and heat-insulating effects.

Furthermore, a second circulating cooling channel is arranged in the fiber laser interface module in a surrounding mode, a second water inlet and a second water outlet are formed in the side edge of the fiber laser interface module, and the second water inlet and the second water outlet are communicated with the second circulating cooling channel. The second circulating cooling channel is arranged, and the cooling effect is achieved.

Specifically, the optical path channel sequentially penetrates through the fiber laser interface module, the collimation protection module, the collimation lens module, the focusing protection module, the mounting seat, the ceramic body and the nozzle from top to bottom. The fiber laser interface module is a QBH interface. Specifically, a plurality of slots penetrating to the light path channel are formed in one side of the main body; the collimation protection module, the collimation lens module, the focusing lens module and the focusing protection module are detachably arranged from corresponding slots on the side surface of the main body; so that the collimating protective lens, the collimating lens, the focusing lens and the two focusing protective lenses are sequentially arranged in the light path channel from top to bottom; the fiber laser interface module is detachably arranged at the upper end of the main body, and the mounting seat is detachably arranged at the lower end of the main body.

The utility model has the advantages that in the utility model, after the laser beam penetrates through the focusing module, a focusing energy focus is formed; the focusing lens barrel can be driven by the motor focusing driving component to move up and down in the light path channel so as to adjust the height of the focusing lens, and then the positive and negative values of the focus can be adjusted to cut plates with different thicknesses and sizes. Compared with the existing manual driving focusing, the motor focusing driving assembly can ensure the precision of each focusing in an automatic driving mode; and the labor cost is lower, and the efficiency is higher.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a first perspective sectional view of the present invention.

Fig. 4 is a second perspective cross-sectional view of the present invention.

Fig. 5 is a schematic structural view of the present invention with the motor base hidden.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-5, an automatic focusing cutting head comprises a main body 1, a fiber laser interface module 2, a collimating lens module 3, a focusing lens module 4, and a nozzle 5, wherein the fiber laser interface module 2, the collimating lens module 3, the focusing lens module 4, and the nozzle 5 are sequentially arranged on the main body 1 from top to bottom; a collimating lens 31 is arranged in the collimating lens module 3, and a focusing lens 41 is arranged in the focusing lens module 4; an optical path channel 11 is arranged in the main body 1, the optical path channel 11 sequentially penetrates through the fiber laser interface module 2, the collimating lens module 3, the focusing lens module 4 and the nozzle 5 from top to bottom, and the collimating lens 31 and the focusing lens 41 are both positioned in the optical path channel 11; the focusing lens module 4 is characterized in that the focusing lens module 4 comprises a focusing lens barrel 42, the focusing lens 41 is fixedly arranged in the focusing lens barrel 42, the focusing lens barrel 42 is movably arranged in the optical path channel 11 of the main body 1, a motor focusing driving component 43 for automatically controlling the focusing lens barrel 42 to move in the optical path channel 11 is fixedly arranged on one side of the main body 1, and the motor focusing driving component 43 is in driving connection with the focusing lens barrel 42 to drive the focusing lens barrel 42 to move up and down in the optical path channel 11.

Further, a window cover plate 44 is further disposed on the other side of the main body 1, a perspective plate 441 is disposed on the window cover plate 44, and the perspective plate 441 corresponds to the focusing lens barrel 42.

Further, the window cover 44 is detachably disposed on the other side of the main body 1.

Further, the motor focusing driving assembly 43 includes a motor 431 and a transmission assembly, the motor 431 is fixedly disposed at one side of the main body 1, an output shaft of the motor 431 is in driving connection with the transmission assembly, a driving through hole 12 is disposed at one side of the main body 1, and the driving through hole 12 corresponds to the focusing lens barrel 42; the transmission assembly passes through the driving through hole 12 and is connected with the focusing lens barrel 42, and the motor 431 drives the focusing lens barrel 42 to move up and down through the transmission assembly.

Further, the transmission assembly comprises a nut seat 432 and a connecting piece 433, the nut seat 432 is movably sleeved on an output shaft of the motor 431, one end of the connecting piece 433 is fixed on the nut seat 432, and the other end of the connecting piece 433 penetrates through the driving through hole 12 to be detachably connected with the focusing lens barrel 42. Specifically, the output shaft of the motor 431 is a threaded shaft, and drives the nut seat 432 to move when rotating. Specifically, the other end of the connecting member 433 is connected to the focus lens barrel 42 by a screw.

Further, a motor base 434 is fixedly arranged on one side of the main body 1, the motor 431 is fixedly arranged in the motor base 434, and the nut base 432 is positioned in the motor base 434; guide cavities 13 are formed between the lower side of the motor base 434 and the side faces of the main body 1 at the two ends of the driving through hole 12, a guide block 435 is fixed at the lower end of the connecting piece 433, and the two ends of the guide block 435 are respectively located in the two guide cavities 13.

Further, a guide rail structure 436 is disposed between the nut holder 432 and the motor holder 434, and the nut holder and the motor holder are movably connected through the guide rail structure 436. The guide rail structure may in particular be a cross guide rail.

Further, a first circulating cooling channel 16 is arranged in the main body 1, a first water inlet 14 and a first water outlet 15 are further arranged on the main body 1, and the first water inlet 14 and the first water outlet 15 are communicated with the first circulating cooling channel 16.

Further, the fiber laser interface module 2, the collimating lens module 3, the focusing lens module 4, and the nozzle 5 are detachably disposed on the main body 1 from top to bottom. In this cutting head, through fiber laser interface module 2, collimation lens module 3, focus lens module 4, nozzle 5 from top to bottom in proper order detachable setting on main part 1 for this cutting head dismouting of being convenient for more, production and processing are more convenient. And this cutting head is more convenient in the maintenance in later stage, change operations such as accessory. When the focusing lens module 4 is removed, the window cover plate 44 can be removed from the main body 1; the focus lens barrel 42 is then removed from the connector 433.

In the cutting head, the fiber laser interface module 2 is used for externally connecting and fixing a fiber laser, laser is emitted from the interior of an optical fiber, and the laser sequentially passes through the collimating lens 31 in the collimating lens module 3 and the focusing lens 41 in the focusing lens module 4 from the light path channel and then is emitted from the nozzle 5 for cutting.

Further, still detachably be provided with collimation protection module 6 on main part 1, collimation protection module 6 sets up between fiber laser interface module 2, collimation lens module 3, be provided with collimation protection lens 61 in the collimation protection module 6, collimation protection lens 61 is located light path channel 11, and collimation protection lens 61 is located collimation lens 31 top.

Further, still detachably be provided with focus protection module 7 on main part 1, focus protection module 7 sets up between focusing lens module 4, nozzle 5, be provided with focus protection lens 71 in the focus protection module 7, focus protection lens 71 is located optical path channel 11, and focus protection lens 71 is located focusing lens 41 below.

Further, the side of the main body 1 is also detachably provided with a temperature control module 8, the temperature control module comprises a temperature control circuit board 83, a temperature sensor 81 is arranged on the temperature control circuit board 83, the main body 1 is provided with a temperature measurement through hole 17 corresponding to the temperature sensor 81, and the temperature sensor 81 corresponds to the focusing protection lens 71 through the temperature measurement through hole 17.

Further, a temperature control display lamp module 82 is further arranged on the main body 1, and the temperature control display lamp module 82 is connected with a temperature control circuit board 83. The temperature control display lamp module 82 is a structure comprising a PCB and a lamp bead.

Further, two focusing protective lenses 71 are disposed in the focusing protective module 7, and the two focusing protective lenses 71 are both located in the optical path channel 11 and both located below the focusing lens 41.

Further, the lower end of the main body 1 is also detachably provided with a mounting seat 9, the side edge of the mounting seat 9 is provided with a gas pipe connector 91, a gas channel 92 is arranged in the mounting seat 9, one end of the gas channel 92 is communicated with the gas pipe connector 91, and the other end of the gas channel 92 is communicated with the light path channel 11 in a penetrating manner.

Furthermore, an amplifier interface 93 for externally connecting an external booster is arranged on the side edge of the mounting seat 9. The mounting base 9 is provided with a sensor, and the sensor is connected with the amplifier interface 93. The amplifier interface 93 is externally connected with a signal amplifier, and the external signal amplifier is connected with an external heightening device; the height between the nozzle 5 and the work surface is obtained so that the external machine tool can adjust the height of the cutting head according to different heights of the machined surface when performing laser cutting. The height adjustment principle of the external height adjuster is the prior art.

Further, the cutting head further comprises a locking sleeve 51, a ceramic body 52 is fixedly arranged at the upper end of the nozzle 5, the locking sleeve 51 is detachably movably sleeved at the lower end of the mounting seat 9, the ceramic body 52 is movably connected with the locking sleeve 51, and the locking sleeve 51 moves on the mounting seat 9 to enable the ceramic body 52 to be locked on the mounting seat 9 or separated from the mounting seat 9.

Further, a second circulating cooling channel 21 is arranged around the inside of the fiber laser interface module 2, a second water inlet 22 and a second water outlet 23 are arranged on the side edge of the fiber laser interface module 2, and the second water inlet 22 and the second water outlet 23 are both communicated with the second circulating cooling channel 21.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An automatic focusing cutting head comprises a main body, a fiber laser interface module, a collimating lens module, a focusing lens module and a nozzle, wherein the fiber laser interface module, the collimating lens module, the focusing lens module and the nozzle are sequentially arranged on the main body from top to bottom; a collimating lens is arranged in the collimating lens module, and a focusing lens is arranged in the focusing lens module; the optical path channel is arranged in the main body, sequentially penetrates through the optical fiber laser interface module, the collimating lens module, the focusing lens module and the nozzle from top to bottom, and is positioned in the optical path channel; the focusing lens module is characterized by comprising a focusing lens barrel, the focusing lens is arranged in the focusing lens barrel, the focusing lens barrel is movably arranged in a light path channel of the main body, a motor focusing driving component for automatically controlling the focusing lens barrel to move in the light path channel is fixedly arranged on one side of the main body, and the motor focusing driving component is in driving connection with the focusing lens barrel so as to drive the focusing lens barrel to move up and down in the light path channel.

2. The automatic focusing cutting head according to claim 1, wherein a window cover plate is further disposed on the other side of the main body, and a perspective plate is disposed on the window cover plate and corresponds to the focusing lens barrel.

3. An autofocus cutting head according to claim 2, wherein the window cover is removably attached to the other side of the body.

4. The automatic focusing cutting head of claim 1, characterized in that the motor focusing driving assembly comprises a motor and a transmission assembly, the motor is fixedly arranged at one side of the main body, an output shaft of the motor is in driving connection with the transmission assembly, one side of the main body is provided with a driving through hole, and the driving through hole corresponds to the focusing lens barrel; the transmission assembly penetrates through the driving through hole to be connected with the focusing lens barrel, and the motor drives the focusing lens barrel to move up and down through the transmission assembly.

5. The automatic focusing cutting head of claim 4, wherein the transmission assembly comprises a nut seat and a connecting piece, the nut seat is movably sleeved on an output shaft of the motor, one end of the connecting piece is fixed on the nut seat, and the other end of the connecting piece penetrates through the driving through hole to be connected with the focusing lens barrel.

6. The automatic focusing cutting head according to claim 5, characterized in that a motor base is fixedly arranged on one side of the main body, the motor is fixedly arranged in the motor base, and the nut base is positioned in the motor base; all be formed with the direction cavity between the main part side at motor cabinet downside and drive through-hole both ends, the connecting piece lower extreme is fixed with the guide block, the guide block both ends are located two direction cavities respectively.

7. The automatic focusing cutting head of claim 6, wherein a guide rail structure is arranged between the nut block and the motor block, and the nut block and the motor block are movably connected through the guide rail structure.

8. The automatic focusing cutting head of claim 1 wherein a first recirculating cooling channel is provided in the body, the body further having a first water inlet and a first water outlet, both the first water inlet and the first water outlet being in communication with the first recirculating cooling channel.

9. The autofocus cutting head of claim 1, wherein the body further comprises a collimating protection module removably disposed thereon, the collimating protection module disposed between the fiber laser interface module and the collimating lens module, the collimating protection module having a collimating protection lens disposed therein, the collimating protection lens disposed in the optical path channel, and the collimating protection lens disposed above the collimating protection lens.

10. The automatic focusing cutting head of claim 1, wherein the main body is further detachably provided with a focusing protection module, the focusing protection module is arranged between the focusing lens module and the nozzle, a focusing protection lens is arranged in the focusing protection module, the focusing protection lens is positioned in the light path channel, and the focusing protection lens is positioned below the focusing lens;

the main part side still detachable be provided with the temperature control circuit board, be provided with temperature sensor on the temperature control circuit board, the main part corresponds temperature sensor and is provided with the temperature measurement through-hole, temperature sensor passes through the temperature measurement through-hole and corresponds with focus protection lens.