WO2022068101A1

WO2022068101A1 - Laser processing head and laser processing device

Info

Publication number: WO2022068101A1
Application number: PCT/CN2020/139175
Authority: WO
Inventors: 蒋修青; 朱小杰
Original assignee: 岗春激光科技（江苏）有限公司
Priority date: 2020-09-30
Filing date: 2020-12-24
Publication date: 2022-04-07
Also published as: CN112091451A

Abstract

A laser processing head and a laser processing device. The laser processing head comprises an optical fiber connecting apparatus (1), a first protection apparatus (2), a collimation apparatus (8), a focusing apparatus (11), a second protection apparatus (12), a nozzle apparatus (5), a back plate (6), and a mounting housing (7) that are sequentially arranged in a laser emission direction; the mounting housing (7) is located between the first protection apparatus (2) and the nozzle apparatus (5) and is connected to the back plate (6); the collimation apparatus (8), the focusing apparatus (11), and the second protection apparatus (12) are all provided in the mounting housing (7); multiple slots (61) are provided at the position, located below the mounting housing (7), of the side of the back plate (6) facing towards the mounting housing (7); a first protection lens can be pulled out or slide in from one side of the first protection apparatus (2); a collimation lens can be pulled out or slide in from one side of the collimation apparatus (8); a focusing lens can be pulled out or slide in from the focusing apparatus (11); and a second protection lens can be pulled out or slide in from one side of the second protection apparatus (12). The laser processing head has a good sealing effect and can reduce dust from the outside; and each lens can be separately taken out and put in, and maintenance and replacement are facilitated.

Description

Laser processing head and laser processing equipment

The present application claims the priority of the Chinese patent application with an application date of September 30, 2020 and an application number of 202011065984.3, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of laser processing, for example, to a laser processing head and laser processing equipment.

Background technique

In the laser cutting process, high-power processing is a development trend, and the main indicator that the laser processing head can achieve high-power processing is that the lens does not heat up under continuous high-power laser irradiation, so that the laser processing head can be long-term stable. cutting, and also consider the ease of maintenance of the laser processing head. During high-power laser processing, fine dust may cause the lens to burn. Therefore, high-power processing requires relatively high sealing performance of the laser processing head. In addition, after the lens is burned out, the lens needs to be replaced. If the lens replacement takes a long time, the production efficiency will be reduced.

SUMMARY OF THE INVENTION

The present application proposes a laser processing head, which has a good sealing effect, thereby facilitating the high-power processing of the laser processing head and facilitating maintenance.

The present application proposes a laser processing equipment, which is beneficial to realize high-power processing and improve production efficiency.

An embodiment provides a laser processing head, including:

An optical fiber connection device, a first protection device, a collimation device, a focusing device, a second protection device and a nozzle device arranged in sequence along the laser emission direction, wherein the first protection device includes a first protection lens, and the collimation device Including a collimating lens, the focusing device includes a focusing lens, the second protecting device includes a second protecting lens, the first protecting lens can be pulled out or slid in from one side of the first protecting device, the collimating lens The collimating lens can be pulled out or slid in from one side of the collimating device, the focusing lens can be pulled out or slid in from the focusing device, and the second protective lens can be pulled out or slid in from one side of the second protective device withdraw or slide in;

a backplane, the optical fiber connection device, the first protection device, the collimation device, the focusing device, the second protection device and the nozzle device are arranged on one side of the backplane; and

an installation shell, located between the first protection device and the nozzle device, and connected to the back plate, the collimating device, the focusing device and the second protection device are all arranged in the installation shell Inside, a plurality of grooves are provided on a side of the back plate facing the installation shell and at a position below the installation shell.

An embodiment provides a laser processing apparatus including the above-mentioned laser processing head.

Description of drawings

1 is a schematic three-dimensional structure diagram of a laser processing head provided by the present application;

2 is a schematic three-dimensional structural diagram of a collimating device, a focusing device and a second protection device of a laser processing head provided by the present application;

3 is a schematic top view of the structure of the laser processing head provided by the present application;

Fig. 4 is the sectional structure schematic diagram at A-A place in Fig. 3;

Fig. 5 is the sectional structure schematic diagram at B-B place in Fig. 3;

Fig. 6 is the partial structure schematic diagram in Fig. 5;

7 is a schematic three-dimensional structure diagram of a collimating device and a driving device of a laser processing head provided by the present application;

8 is a schematic three-dimensional structure diagram of the collimation device of the laser processing head provided by the present application after removing the first shielding cylinder and the second shielding cylinder;

FIG. 9 is a schematic diagram of an exploded structure of the focusing device of the laser processing head provided by the present application.

In the picture:

1. Optical fiber connection device; 2. The first protection device; 21. The first base; 22. The first lens barrel; 23. The energy absorbing member; 24. The connection seat; 3. The cover plate; 41, the fourth base; 42, the fourth lens barrel; 5, the nozzle device; 51, the fifth base; 52, the first connecting body; 53, the second connecting body; 54, the insulating sleeve; 55, the nozzle; 6. Back plate; 61. Groove; 7. Mounting shell; 8. Collimating device; 81. First shielding barrel; 82. Second lens barrel; 83. Second base; 84. Second shielding barrel; 9 91, voice coil motor; 92, limit mechanism; 921, first photoelectric switch; 922, induction part; 923, second photoelectric switch; 10, cooling device; 101, third cooling channel; 102, first Two cooling channels; 103, first cooling channel; 11, focusing device; 111, third lens barrel; 112, third base; 113, moving mechanism; 1131, driving part; 11311, adjusting column; 11312, adjusting block; 1132, shrapnel; 114, drawer seat; 12, second protection device; 13, auxiliary air blowing device; 131, first air blowing mechanism; 1311, air inner ring; 13111, air hole; 1312, air flow groove; 132, third Blowing mechanism; 133. Second blowing mechanism; 14. Air pressure gauge.

Detailed ways

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Therein, the terms "first position" and "second position" are two different positions.

Unless otherwise expressly specified and limited, the terms "installed", "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection; it may be a mechanical connection, or a It can be an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be an internal connection between two elements or an interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

Unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first feature and the second feature in direct contact, or may include the first feature and the second feature not in direct contact Rather, they are contacted by additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The present application provides a laser processing apparatus including a laser processing head.

As shown in Figures 1 to 4, the laser processing head includes an optical fiber connection device 1, a first protection device 2, a collimation device 8, a focusing device 11, a second protection device 12, a nozzle device 5, The back plate 6 and the mounting shell 7, the first protection device 2 includes a first protection lens, the collimation device 8 includes a collimation lens, the focusing device 11 includes a focusing lens, and the second protection device 12 includes a second protection lens. The optical fiber connection device 1 , the first protection device 2 , the collimation device 8 , the focusing device 11 , the second protection device 12 and the nozzle device 5 are arranged on one side of the back plate 6 .

The mounting shell 7 is located between the first protection device 2 and the nozzle device 5 and is connected to the back plate 6 . The collimating device 8 , the focusing device 11 and the second protection device 12 are all arranged in the installation shell 7 . A plurality of grooves 61 are provided on the side of the back plate 6 facing the installation shell 7 and located below the installation shell 7 , and the dust entering from the back plate 6 and the connection between the nozzle device 5 and the back plate 6 can be stored in the grooves 61 . In order to avoid dust contamination of the lens in the mounting shell 7.

The first protective lens can be pulled out or slid in from one side of the first protective device 2, the collimating lens can be pulled out or slid in from one side of the collimating device 8, the focusing lens can be pulled out or slid in from the focusing device 11, and the first The two protective lenses can be pulled out or slid in from one side of the second protective device 12 . Each lens can be taken out and put in individually, which can facilitate the maintenance and replacement of the first protective lens, the collimating lens, the focusing lens and the second protective lens, thereby helping to improve production efficiency.

In this embodiment, the mounting shell 7 can make the collimating device 8, the focusing device 11 and the second protection device 12 form a whole, which reduces the way of entering the dust. The arrangement of the back plate 6 and the mounting shell 7 enables the laser processing head in the present application to form a good sealing effect except for the laser input port and the laser output port of the laser processing head, thereby reducing the entry of external dust, which is beneficial to the laser processing. The machining head realizes high-power machining.

In order to further improve the sealing effect at the mounting shell 7, the laser processing head in this embodiment further includes a cover plate 3, the cover plate 3 is connected to the side of the mounting shell 7 away from the back plate 6, the collimating lens, the focusing lens and the first The two protective lenses can be pulled out or slid in from the side of the mounting shell 7 away from the back plate 6 , and the outer edge of the cover plate 3 is sealed with the mounting shell 7 to connect the collimating lens, the focusing lens and the mounting shell 7 corresponding to the second protective lens. The installation port is sealed. The arrangement of the cover plate 3 can prevent dust from entering the interior of the installation shell 7 from the installation openings of the collimating lens, the focusing lens and the second protective lens, thereby improving the power of the laser processing head in this embodiment.

In order to improve the processing power of the laser processing head in this embodiment and prevent the lens from being burned out due to excessive temperature, the laser processing head in this embodiment further includes a cooling device 10, and the cooling device 10 includes a first cooling channel 103, a second cooling channel The cooling channel 102 and the third cooling channel 101, the water inlet of the first cooling channel 103 is arranged in the first protection device 2, and the first cooling channel 103 is sequentially penetrated through the first protection device 2, the installation shell 7 and the second protection device 12. , the water outlet of the first cooling channel 103 is disposed on the installation shell 7 , and the first cooling channel 103 can cool the entire laser processing head in this embodiment. The second cooling channel 102 is disposed in the collimating device 8 , and the cooling effect on the collimating lens can be improved through the second cooling channel 102 . The third cooling channel 101 is arranged in the focusing device 11 , and the cooling effect on the focusing lens can be improved by the arrangement of the third cooling channel 101 .

As shown in FIGS. 4 and 5 , the first protection device 2 further includes a first base 21 , a first lens barrel 22 , a connecting seat 24 and an energy absorbing member 23 . The first base 21 is connected to the mounting shell 7 , and a first slot is opened on one side of the first base 21 . The first lens barrel 22 is inserted in the first slot, and the first protective lens is disposed in the first lens barrel 22. The first lens barrel 22 can drive the first protective lens to be pulled out from one side of the first base 21, which can facilitate the Replacement and maintenance of the first protective lens. The connection seat 24 is arranged between the first base 21 and the installation shell 7 . The energy absorbing member 23 is arranged in the connecting seat 24. The energy absorbing member 23 has a through hole for the laser beam to pass through. The through hole is tapered. The top of the energy absorbing member 23 is connected to the bottom of the first base 21, and the first cooling The channel 103 passes through the energy absorbing member 23 . The stray light of the laser beam can be blocked by the energy absorbing member 23, and the first cooling channel 103 can dissipate heat to the energy absorbing member 23, thereby eliminating the heat generated by the stray light, reducing the heat of the laser processing head, and improving the efficiency of the laser processing head. processing efficiency.

As shown in FIG. 4 , FIG. 7 , and FIG. 8 , the collimating device 8 further includes a second base 83 , a second lens barrel 82 , a first shielding cylinder 81 and a second shielding cylinder 84 , and the second base 83 is provided on the installation Inside the shell 7, a second slot is opened on one side of the second base 83. The second lens barrel 82 is disposed in the second slot, the collimating lens is disposed in the second lens barrel 82, the mounting shell 7 has a first socket corresponding to the second slot, and the second lens barrel 82 can drive the collimating lens It can be pulled out or slid in from the first socket, so that the maintenance and replacement of the collimating lens can be facilitated. The first shielding cylinder 81 is disposed in the installation shell 7 , and the first shielding cylinder 81 is connected to the top of the first base 21 . The second shielding cylinder 84 is disposed on the mounting shell 7 , and the second shielding cylinder 84 is connected to the bottom of the first base 21 . The first shielding cylinder 81 and the second shielding cylinder 84 can block the stray light of the laser beam.

As the application of laser processing becomes more and more extensive, the requirements for laser processing become higher and higher, and more and more laser cutting heads require automatic focus adjustment, in order to realize automatic focus adjustment of the laser processing head in this embodiment. As shown in FIG. 4 and FIG. 7 , the backplane 6 has a cavity, and the laser processing head further includes a driving device 9 . The driving device 9 is arranged in the cavity. The driving device 9 includes a voice coil motor 91 , and the second base 83 is slidably connected. On the inner wall of the mounting shell 7 , the output end of the voice coil motor 91 is connected to the second base 83 to drive the second base 83 to reciprocate along the direction of the center axis of the second base 83 . The second base 83 is driven by the voice coil motor 91 to drive the focusing lens to move, so as to realize the focus adjustment of the laser head, the response speed is fast, the efficiency of perforation processing can be improved, and there is no wear of the transmission parts, thereby improving the service life of the laser head. In one embodiment, the driving device 9 further includes a limiting mechanism 92 , and the stroke of the voice coil motor 91 is controlled by the limiting mechanism 92 . Optionally, the limiting mechanism 92 includes a first photoelectric switch 921 and a second photoelectric switch 923 which are fixed to the mounting shell 7 or the back plate 6 and are arranged at intervals along the moving direction of the second base 83. The first photoelectric switch 921 and the The position of the highest point of the second base 83 corresponds to the position of the highest point of the second base 83 , the second photoelectric switch 923 corresponds to the position of the lowest point of the second base 83 , the second base 83 is connected with a sensing element 922 , and the sensing element 922 is configured to trigger the first photoelectric switch 921 or the second photoelectric switch 923. Exemplarily, when the second base 83 drives the sensing member 922 to move to the position of the first photoelectric switch 921 , the voice coil motor 91 reversely drives the second base 83 to move in the reverse direction, and the second base 83 drives the sensing member 922 to move When the position of the second photoelectric switch 923 is reached, the voice coil motor 91 reversely drives the second base 83 to move in the opposite direction again, so as to reciprocate, so that the reciprocating motion of the second base 83 can be realized.

As shown in FIG. 4 and FIG. 5 , the focusing device 11 includes a third base 112 , a third lens barrel 111 and a moving mechanism 113 . The third base 112 is arranged in the installation shell 7 , and one side of the third base 112 is opened There is a third slot, and the mounting shell 7 is provided with a second socket corresponding to the third slot. The third lens barrel 111 is disposed in the third slot, and the focusing lens is disposed in the third lens barrel 111 . The third lens barrel 111 can drive the focusing lens to be pulled out or slid in from the second socket, thereby facilitating maintenance and replacement of the focusing lens. The moving mechanism 113 can drive the third base 112 to move in the installation shell 7 along the direction perpendicular to the emission direction of the laser light. The position of the focusing lens can be adjusted by the moving mechanism 113 , thereby helping to ensure the coaxiality of the collimating lens.

In one embodiment, the moving mechanism 113 includes a driving member 1131 and an elastic sheet 1132, the driving member 1131 is connected to the third base 112, and the elastic sheet 1132 is disposed between the third base 112 and the inner wall of the installation shell 7, and the elastic sheet 1132 is located on the side of the third base 112 away from the second socket. When the driving member 1131 exerts force, the driving member 1131 can push the third base 112 to move, and the third base 112 can squeeze the elastic piece 1132 so that the elastic piece 1132 pushes the third base 112 to move. The movement amount of the third base 112 can be controlled by controlling the magnitude of the force applied to the elastic piece 1132 , and the adjustment is convenient.

As shown in FIG. 9 , the focusing device 11 further includes a drawer base 114 disposed at the second socket, and the driving member 1131 includes two top blocks and two adjustment columns 11311 , and the first ends of the two top blocks are connected to the drawer base. 114 is connected by a rotating shaft, and the second ends of the two top blocks are respectively located on both sides of the third base 112 and can abut against the third base 112 . Each adjusting column 11311 corresponds to a top block, and each adjusting column 11311 penetrates the drawer base 114 from the outside to the inside of the drawer base 114 and can abut on the top block to drive the top block to rotate around the shaft. When the position of the third base 112 needs to be adjusted, the adjusting column 11311 is rotated, and the adjusting column 11311 moves to the top block. Under the force, the third base 112 is pushed to move, and the position of the third base 112 is adjusted by the cooperation of the two adjusting columns 11311, which makes the adjustment more convenient.

In this embodiment, the adjusting column 11311 is provided with a sealing ring. The setting of the sealing ring can increase the sealing effect of the connection between the adjusting column 11311 and the drawer base 114, and prevent dust from entering the installation shell from the connection between the adjusting column 11311 and the drawer base 114. 7 inside.

In this application, the first protection device 2 can prevent dust from entering the laser processing head in this embodiment and contaminate the lens when the laser head is inserted and pulled out, and the second protection device 12 can prevent anti-slag, smoke, etc. The laser processing head in the example contaminates the lens inside.

In order to further prevent anti-slag, smoke, etc. from entering the interior of the laser processing head in this embodiment, as shown in FIG. 4 , FIG. 5 and FIG. 6 , the laser processing head in this embodiment further includes a third protection device 4. The third protection device 4 is arranged between the second protection device 12 and the nozzle device 5 , and the third protection device 4 includes a fourth base 41 , a fourth lens barrel 42 and a third protection lens. The fourth base 41 is disposed at the bottom of the mounting shell 7 , and a fourth slot is opened on one side of the fourth base 41 . The fourth lens barrel 42 is inserted into the fourth slot. The third protective lens is disposed in the fourth lens barrel 42 .

As shown in FIGS. 1 and 4 , the nozzle device 5 is connected with an air pressure gauge, and the air pressure gauge can easily detect the air pressure in the nozzle device 5 . By comparing the air pressure in the nozzle device 5 and the pressure difference supplied by the air source, it is convenient to eliminate the pressure difference and air leakage in the air circuit, and it is also convenient for the operator to find the appropriate cutting value, optimize the air pressure, and save the amount of air. .

As shown in FIG. 4 to FIG. 6 , the nozzle device 5 includes a fifth base 51 , a first connecting body 52 , a second connecting body 53 , an insulating sleeve 54 and a nozzle 55 arranged in sequence along the emission direction of the laser light. The insulating sleeve 54 is threadedly connected, the insulating sleeve 54 and the second connecting body 53 are connected by a locking nut, the outer edge of the insulating sleeve 54 is provided with a flange, and the locking nut is sleeved on the insulating sleeve 54 and abuts the bottom On the lower bottom surface of the flange, the top of the insulating sleeve 54 is screwed to the second connecting body 53 .

During the laser cutting process, the uniformity and stability of the airflow has a great influence on the size of the slit, the shape of the cross-section, and the roughness. The air blowing mechanism 131. The first air blowing mechanism 131 includes an air inner ring 1311. The air inner ring 1311 is arranged in the fourth base 41. The outer walls of the two ends of the air inner ring 1311 are sealed with the inner wall of the fourth base 41. The outer wall of the middle section of the inner ring 1311 and the inner wall of the fourth base 41 form an annular air flow groove 1312. The wall of the inner ring 1311 is provided with a plurality of air holes 13111 which are inclined upward and face the third protective lens. The rings 1311 are evenly distributed in the circumferential direction and communicate with the air flow grooves 1312 . At least two air inlets communicated with the air flow grooves 1312 are provided on the fourth base 41 . The arrangement of the first air blowing mechanism 131 improves the stability of the air flow, thereby improving the quality of laser processing. In one embodiment, the air flow groove 1312 is connected with at least two air inlets, and the air inlets are evenly distributed along the circumferential direction of the air flow groove 1312 to improve the homogenization effect of the air flow. In one embodiment, the ratio of the volume of the air flow groove 1312 to the volume of the laser beam channel from the third protective lens to the end of the nozzle device 5 is 3:16, and through the air groove 1312 and the third protective lens to the end of the nozzle device 5 The setting of the volume ratio of the laser beam channel further improves the homogenization effect of the airflow. After being reflected by the third protective lens, the airflow flows out of the nozzle device 5 evenly and smoothly, and the welding slag on the surface of the workpiece is quickly blown away by the uniform and stable high-speed airflow, which can improve the welding quality. At the same time, when the air flow blows to the third protective lens, it can prevent the third protective lens from depositing dust and pollute the third protective lens, and can also take away the heat generated by the third protective lens, so as to improve the service life of the third protective lens.

As shown in FIGS. 4 and 5 , the auxiliary air blowing device 13 further includes a third air blowing mechanism 132 and a second air blowing mechanism 133 . The air outlet of the third air blowing mechanism 132 is provided on one side of the nozzle device 5 . By blowing air on the outside of the nozzle device 5 , the residues produced in the cutting perforation can be blown away, and at the same time, the nozzle device 5 can be cooled to a certain extent. The air outlet of the second air blowing mechanism 133 is arranged on the nozzle device 5 and is arranged on the periphery of the laser outlet of the nozzle device 5. By providing the air outlet on the periphery of the nozzle 55, the temperature of the nozzle 55 can be lowered.

In this embodiment, the mounting shell 7 can form a double layer of protection at the collimating device 8 , the focusing device 11 and the second protection device 12 , and the setting of the back plate 6 and the mounting shell 7 can enable the laser processing head in this application to remove the laser A good sealing effect is formed outside the laser entrance port and the laser exit port of the processing head, so that the entry of external dust can be reduced, which is conducive to the high-power processing of the laser processing head. The setting of the cooling device 10 can improve the processing of the laser processing head. efficiency. In addition, each lens can be taken out and put in individually, which can facilitate the maintenance and replacement of the first protective lens, the collimating lens, the focusing lens and the second protective lens, thereby helping to improve production efficiency.

The optical fiber connection device 1 , the first protection device 2 , the collimation device 8 , the focusing device 11 , the second protection device 12 and the nozzle device 5 of the present application are arranged on one side of the back plate 6 ; the installation shell 7 is located on the first protection device 2 Between the nozzle device 5 and the back plate 6, the collimation device 8, the focusing device 11 and the second protection device 12 are all arranged in the installation shell 7, so that the collimation device 8, the focusing device 11 and the second protection device The device 12 is formed as a whole, which reduces the entry way of dust; the back plate 6 faces the side of the installation shell 7 and is provided with a plurality of grooves 61 at the position below the installation shell 7. The back plate 6 and the nozzle device 5 and the back plate The dust entering at the connection of 6 can be stored in the groove 61 to prevent dust from contaminating the lens in the mounting shell 7. The setting of the back plate 6 and the mounting shell 7 can make the laser processing head in the present application remove the laser incidence of the laser processing head. A good sealing effect is formed outside the port and the laser exit port, which can reduce the entry of external dust, which is conducive to the high-power processing of the laser processing head; in addition, the first protective lens can be pulled out from one side of the first protective device Sliding in, the collimating lens can be pulled out or slid in from one side of the collimating device 8 , the focusing lens can be pulled out or slid in from the focusing device 11 , and the second protective lens can be pulled out or slid in from one side of the second protective device 12 . Each lens can be taken out and put in individually, which can facilitate the maintenance and replacement of the first protective lens, the collimating lens, the focusing lens and the second protective lens, thereby helping to improve production efficiency.

Claims

A laser processing head, comprising:

An optical fiber connection device (1), a first protection device (2), a collimation device (8), a focusing device (11), a second protection device (12) and a nozzle device (5) arranged in sequence along the laser emission direction, wherein , the first protection device (2) includes a first protection lens, the collimation device (8) includes a collimation lens, the focusing device (11) includes a focusing lens, and the second protection device (12) includes A second protective lens; the first protective lens can be pulled out or slid in from one side of the first protective device (2), and the collimating lens can be pulled out or slid in from one side of the collimating device (8) sliding in, the focusing lens can be pulled out or slid in from the focusing device (11), and the second protective lens can be pulled out or slid in from one side of the second protective device (12);

The backplane (6), the optical fiber connection device (1), the first protection device (2), the collimation device (8), the focusing device (11), and the second protection device (12) ) and the nozzle device (5) are arranged on one side of the back plate (6); and

An installation shell (7) is located between the first protection device (2) and the nozzle device (5), and is connected to the back plate (6), the collimating device (8), the focusing device Both the device (11) and the second protection device (12) are arranged in the mounting shell (7), and the back plate (6) faces the side of the mounting shell (7) and is located in the mounting shell The position below (7) is provided with a plurality of grooves (61).
The laser processing head according to claim 1, further comprising a cover plate (3), the cover plate (3) is connected to a side of the mounting shell (7) facing away from the back plate (6), the The collimating lens, the focusing lens and the second protective lens can be pulled out or slid in from the side of the mounting shell (7) away from the back plate (6), and the outer edge of the cover plate (3) It is sealed with the mounting shell (7) to seal the collimating lens, the focusing lens and the second protection lens corresponding to the mounting opening of the mounting shell (7).
The laser processing head according to claim 1, further comprising a cooling device (10), the cooling device (10) comprising:

A first cooling channel (103), the water inlet of the first cooling channel (103) is arranged in the first protection device (2), and the first cooling channel (103) is sequentially penetrated through the first protection device the device (2), the installation shell (7) and the second protection device (12), the water outlet of the first cooling channel (103) is arranged in the installation shell (7);

a second cooling channel (102), the second cooling channel (102) being provided in the collimating device (8); and

A third cooling channel (101), the third cooling channel (101) is provided in the focusing device (11).
The laser processing head according to claim 3, wherein the first protection device (2) further comprises:

a first base (21), connected to the mounting shell (7), and a first slot is opened on one side of the first base (21);

a first lens barrel (22), the first lens barrel (22) is inserted in the first slot, and the first protective lens is disposed in the first lens barrel (22);

a connecting seat (24), arranged between the first base (21) and the mounting shell (7);

The energy absorbing member (23) is arranged in the connecting seat (24), the energy absorbing member (23) has a through hole for the laser beam to pass through, the through hole is tapered, and the energy absorbing member ( The top of 23) is connected to the bottom of the first base (21), and the first cooling channel (103) passes through the energy absorbing member (23).
The laser processing head according to any one of claims 1-4, wherein the collimating device (8) further comprises:

a second base (83), the second base (83) is arranged in the mounting shell (7), and a second slot is opened on one side of the second base (83);

The second lens barrel (82), the second lens barrel (82) is arranged in the second slot, the collimating lens is arranged in the second lens barrel (82), the mounting shell ( 7) A first socket is provided corresponding to the second slot;

A first shielding cylinder (81), the first shielding cylinder (81) is arranged in the mounting shell (7), and the first shielding cylinder (81) is connected to the top of the first base (21) ;and

A second shielding cylinder (84), the second shielding cylinder (84) is arranged in the mounting shell (7), and the second shielding cylinder (84) is connected to the bottom of the first base (21) .
The laser processing head according to claim 5, wherein the back plate (6) has a cavity, the laser processing head further comprises a driving device (9), and the driving device (9) is arranged in the cavity, The driving device (9) comprises a voice coil motor (91), the second base (83) is slidably connected to the inner wall of the mounting shell (7), and the output end of the voice coil motor (91) is connected to the inner wall of the mounting shell (7). The second base (83) drives the second base (83) to reciprocate along the direction of the central axis of the second base (83).
The laser processing head according to any one of claims 1-4, wherein the focusing device (11) comprises:

A third base (112) is arranged in the mounting shell (7), a third slot is opened on one side of the third base (112), and the mounting shell (7) corresponds to the third A second socket is opened at the slot;

The third lens barrel (111) is arranged in the third slot, and the focusing lens is arranged in the third lens barrel (111); and

A moving mechanism (113), the moving mechanism (113) can drive the third base (112) to move in the installation shell (7) along a direction perpendicular to the emission direction of the laser light.
The laser processing head according to any one of claims 1-4, further comprising a third protection device (4), the third protection device (4) being arranged on the second protection device (12) and the nozzle Between the devices (5), the third protection device (4) includes:

a fourth base (41), arranged at the bottom of the mounting shell (7), and a fourth slot is opened on one side of the fourth base (41);

a fourth lens barrel (42), inserted in the fourth slot; and

A third protective lens, the third protective lens is arranged in the fourth lens barrel (42).
The laser processing head according to any one of claims 8, further comprising an auxiliary air blowing device (13), the auxiliary air blowing device (13) comprising a third air blowing mechanism (132), the third air blowing mechanism (132) )include:

The gas inner ring (1311), the gas inner ring (1311) is arranged in the fourth base (41), and the outer walls at both ends of the gas inner ring (1311) are connected to the fourth base (41). The inner wall forms a sealed connection, the outer wall of the middle section of the gas inner ring (1311) and the inner wall of the fourth base (41) form an annular gas flow groove (1312), and the walls of the gas inner ring (1311) are provided with multiple a plurality of air holes (13111) inclined upward and facing the third protective lens, the plurality of air holes (13111) are evenly distributed along the circumference of the air inner ring (1311) and communicate with the air flow groove (1312), The fourth base (41) is provided with at least two air inlets communicating with the air flow grooves (1312).
A laser processing equipment, comprising the laser processing head of any one of claims 1-9.