High-power laser cutting head

Abstract

The utility model belongs to the technical field of laser cutting, and particularly provides a high-power laser cutting head which comprises a pendulum shaft mechanism and an A-axis slewing mechanism for driving the pendulum shaft mechanism to rotate around an A axis. A reflector assembly is mounted on the A-axis slewing mechanism; an oblique reflecting mirror assembly and a focusing mirror assembly are mounted on the pendulum shaft mechanism; the reflecting mirror assembly, the oblique reflecting mirror assembly and the focusing mirror assembly are sequentially arranged along a light path; a reflector cooling pipeline is arranged on the reflector assembly; an oblique reflecting mirror cooling pipeline is arranged on the oblique reflecting mirror assembly; and a focus lens cooling pipeline is arranged on the focus lens assembly. The cooling pipeline is arranged to cool the lens assembly on the light path, so that the cutting head is prevented from being heated and hot in the using process, and the cutting head can adapt to high-power operation. In addition, the swing shaft mechanism is detachably connected with the A-axis swing mechanism, multi-axis cutting from low power to high power can be achieved by replacing the using power of the swing shaft mechanism, and the multi-axis cutting device is suitable for cutting of thick plate three-dimensional parts.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser cutting, and particularly relates to a high-power laser cutting head. Background Art

[0002] Laser cutting is to use a laser beam to pass through an optical path and then irradiate the surface of a workpiece to be processed through a nozzle to complete the cutting of the material. Nowadays, laser cutting technology has been widely used in various industries, and the demand for cutting three-dimensional workpieces is gradually increasing. In addition to cutting standardized plates and pipes, it is also necessary to consider cutting three-dimensional parts with complex curved surface structures, such as hot-formed parts in the automotive industry, and cladding parts in the aerospace industry. During the laser cutting process, the cutting head plays a role in concentrating the light beam, and the concentrated light beam will generate a high amount of heat energy on the cutting head, which leads to the temperature rise and overheating of the cutting head. In the prior art, the power of a multi-axis cutting head is about 3KW and is used for thin plate cutting. There is a lack of a multi-axis cutting head with a power above 8KW that can be used for thick plate cutting. Content of the Utility Model

[0003] The purpose of the utility model is to solve the problem that three-dimensional parts of thick plates cannot be laser cut.

[0004] To this end, the utility model provides a high-power laser cutting head, which includes a swing shaft mechanism and an A-axis slewing mechanism for driving the swing shaft mechanism to rotate around the A-axis; the swing shaft mechanism is detachably connected to the A-axis slewing mechanism; a mirror assembly is installed on the A-axis slewing mechanism; a skew mirror assembly and a focusing mirror assembly are installed on the swing shaft mechanism; the mirror assembly, the skew mirror assembly and the focusing mirror assembly are arranged in sequence along the optical path; a mirror cooling pipeline is provided on the mirror assembly; a skew mirror cooling pipeline is provided on the skew mirror assembly; a focusing mirror cooling pipeline is provided on the focusing mirror assembly.

[0005] Specifically, the above-mentioned mirror assembly includes a mirror base and a mirror; the mirror base is installed on the A-axis slewing mechanism; the mirror is installed on the mirror base; the mirror cooling pipeline is wound around the inside of the mirror base.

[0006] Specifically, the above-mentioned skew mirror assembly includes a skew mirror base and a skew mirror; the skew mirror base is installed on the swing shaft mechanism; the skew mirror is installed on the skew mirror base; the skew mirror cooling pipeline is wound around the inside of the skew mirror base.

[0007] Specifically, the above-mentioned focusing mirror assembly includes a focusing mirror base and a focusing mirror; the focusing mirror base is installed on the swing shaft mechanism; the focusing mirror is installed on the focusing mirror base; the focusing mirror cooling pipeline is wound around the inside of the focusing mirror base.

[0008] Specifically, the above high-power laser cutting head further includes a collimation mechanism; the collimation mechanism is connected to the A-axis rotation mechanism.

[0009] Specifically, the above collimation mechanism includes a collimating mirror seat and a collimating mirror; the collimating mirror seat is connected to the A-axis rotation mechanism; the collimating mirror is installed on the collimating mirror seat.

[0010] Specifically, a collimating mirror cooling pipe is wound inside the above collimating mirror seat.

[0011] Specifically, the above collimation mechanism further includes a collimation adjustment component for controlling the incident angle of the laser entering the mirror assembly; the collimating mirror seat is connected to the A-axis rotation mechanism through the collimation adjustment component.

[0012] Specifically, the above A-axis rotation mechanism includes an A-axis body and an A-axis hollow turntable; the A-axis body is connected to the A-axis hollow turntable; the rotating end of the A-axis hollow turntable is detachably connected to the swing axis mechanism.

[0013] Specifically, the above high-power laser cutting head further includes an anti-collision mechanism; the anti-collision mechanism includes a first anti-collision part and a second anti-collision part; the connection between the first anti-collision part and the second anti-collision part is detachable; the first anti-collision part is connected to the A-axis rotation mechanism; the second anti-collision part is connected to the swing axis mechanism.

[0014] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0015] The high-power laser cutting head provided by the present utility model cools and reduces the temperature of the lens assembly on the optical path of the cutting head by setting a cooling pipe, avoiding the heating and overheating of the cutting head during use, enabling it to adapt to high-power operations, being applicable to the cutting of thick plate three-dimensional parts, and improving the production efficiency of three-dimensional thick plate parts.

[0016] The following will further elaborate on the present utility model in conjunction with the accompanying drawings. Brief Description of the Drawings

[0017] Figure 1 is the first perspective structural schematic diagram of the high-power laser cutting head provided by the present utility model.

[0018] Figure 2 is the second perspective structural schematic diagram of the high-power laser cutting head provided by the present utility model.

[0019] Figure 3 is the third perspective structural schematic diagram of the high-power laser cutting head provided by the present utility model.

[0020] Figure 4It is the front view of the high-power laser cutting head provided by the present utility model.

[0021] Figure 5 It is the side view of the high-power laser cutting head provided by the present utility model.

[0022] Figure 6 It is the cross-sectional view of the A-axis rotation mechanism of the high-power laser cutting head provided by the present utility model.

[0023] Figure 7 It is the cross-sectional view of the swing axis mechanism of the high-power laser cutting head provided by the present utility model.

[0024] Figure 8 It is the cross-sectional view of the collimation mechanism of the high-power laser cutting head provided by the present utility model.

[0025] Figure 9 It is the cross-sectional view of the anti-collision component of the high-power laser cutting head provided by the present utility model.

[0026] Explanation of reference numerals: 100, collimation mechanism; 101, fiber optic output component; 102, collimating mirror base; 103, collimating mirror; 104, collimation adjustment component; 1041, movable plate; 1042, fixed plate; 105, collimation liquid inlet; 106, collimation liquid outlet; 200, A-axis rotation mechanism; 201, mounting flange; 202, adjustment plate; 203, A-axis body; 204, A-axis drive device; 205, A-axis hollow turntable; 206, A-axis liquid inlet; 207, A-axis liquid outlet; 300, mirror component; 301, mirror base; 302, mirror; 303, adjustment seat; 400, swing axis mechanism; 401, swing axis body; 402, inclined mirror base; 403, inclined mirror; 404, focusing mirror base; 405, focusing mirror; 406, sensor; 407, nozzle; 408, inclined mirror liquid inlet; 409, inclined mirror liquid outlet; 410, focusing mirror liquid inlet; 500, anti-collision mechanism; 501, first anti-collision part; 502, proximity switch; 503, magnet; 504, second anti-collision part. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0029] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; in the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] Referring to Figures 1-9 , the present utility model provides a high-power laser cutting head, which includes a swing shaft mechanism 400 and an A-axis slewing mechanism 200 for driving the swing shaft mechanism 400 to rotate around the A-axis. The swing shaft mechanism 400 is preferably detachably connected to the A-axis slewing mechanism 200; a mirror assembly 300 is installed on the A-axis slewing mechanism 200; an inclined mirror assembly and a focusing lens assembly are installed on the swing shaft mechanism 400; the mirror assembly 300, the inclined mirror assembly and the focusing lens assembly are arranged in sequence along the optical path; a mirror cooling pipeline is provided on the mirror assembly 300; an inclined mirror cooling pipeline is provided on the inclined mirror assembly; a focusing lens cooling pipeline is provided on the focusing lens assembly; the mirror cooling pipeline, the inclined mirror cooling pipeline and the focusing lens cooling pipeline are communicated in sequence.

[0031] During actual use, the A-axis slewing mechanism 200 is started as needed, and the A-axis slewing mechanism 200 drives the swing shaft mechanism 400 to rotate around the A-axis. In this process, the laser emitted by the optical fiber is reflected by the mirror assembly 300 and the inclined mirror assembly and then reaches the focusing lens assembly, and a focus is formed by the focusing lens assembly on the surface of the object to be processed to complete the cutting. During the cutting process, cooling water or other feasible cooling media are injected into the mirror cooling pipeline, the inclined mirror cooling pipeline and the focusing lens cooling pipeline to cool the mirror assembly 300, the inclined mirror assembly and the focusing lens assembly. Further, the mirror assembly 300 includes a mirror base 301 and a mirror 302; the mirror base 301 is installed on the A-axis slewing mechanism 200; the mirror 302 is installed on the mirror base 301; the mirror cooling pipeline is wound inside the mirror base 301. The winding path of the mirror cooling pipeline is designed according to the structure of the mirror base 301 and the actual placement position of the mirror 302 to ensure that the mirror 302 can be fully cooled during use.

[0032] Optionally, the diagonal mirror assembly includes a diagonal mirror base 402 and a diagonal mirror 403; the diagonal mirror base 402 is mounted on the swing axis mechanism 400; the diagonal mirror 403 is mounted on the diagonal mirror base 402; the diagonal mirror cooling pipe is wound inside the diagonal mirror base 402. The winding path of the diagonal mirror cooling pipe is designed according to the structure of the diagonal mirror base 402 and the actual placement position of the diagonal mirror 403 to ensure that the diagonal mirror 403 can be fully cooled during use.

[0033] Optionally, the focusing mirror assembly includes a focusing mirror base 404 and a focusing mirror 405; the focusing mirror base 404 is mounted on the swing axis mechanism 400; the focusing mirror 405 is mounted on the focusing mirror base 404; the focusing mirror cooling pipe is wound inside the focusing mirror base 404. The winding path of the focusing mirror cooling pipe is designed according to the structure of the focusing mirror base 404 and the actual placement position of the focusing mirror 405 to ensure that the focusing mirror 405 can be fully cooled during use.

[0034] To facilitate the adjustment of the optical path, the mirror assembly 300 and / or the diagonal mirror assembly are provided with an adjustment base 303 for adjusting the incident angle of the laser. After connecting the mirror 302 and the diagonal mirror 403 to their respective mirror bases, they are mounted on the adjustment base 303. Then, the adjustment base 303 is mounted on the A-axis rotation mechanism 200 or the swing axis mechanism 400 through an adjustment nut and an adjustment screw. By changing the position of the adjustment base 303 through the adjustment nut and the adjustment screw, the placement angles of the mirror 302 and the diagonal mirror 403 are changed to ensure the accuracy of the optical path.

[0035] In one embodiment, the high-power laser cutting head further includes a collimation mechanism 100; the collimation mechanism 100 is connected to the A-axis rotation mechanism 200. The collimation mechanism 100 can select other feasible devices in the art according to actual needs.

[0036] Specifically, the collimation mechanism 100 includes a collimation mirror base 102 and a collimation mirror 103; the collimation mirror base 102 is connected to the A-axis rotation mechanism 200; the collimation mirror 103 is mounted on the collimation mirror base 102 such that the divergent light of the laser forms parallel light after focusing. Preferably, there is a lead screw motor inside the collimation mirror base 102, and the collimation mirror 103 is connected to the output end of the motor through a lead screw nut. By driving the lead screw to rotate by the motor, the collimation mirror 103 mounted on the lead screw nut is driven to move up and down, thereby realizing the function of focal point adjustment.

[0037] To improve the heat dissipation of the collimation mirror 103, a collimation mirror cooling pipe is wound inside the collimation mirror base 102. The winding path of the collimation mirror cooling pipe is designed according to the structure of the collimation mirror base 102 and the actual placement position of the focusing mirror 405 to ensure that the focusing mirror 405 can be fully cooled during use.

[0038] The collimator cooling pipe, the mirror cooling pipe, the diagonal mirror cooling pipe, and the focusing mirror cooling pipe can be connected to facilitate the injection of the cooling medium. In a refined embodiment, a collimator liquid inlet 105 and a collimator liquid outlet 106 are provided on the collimation mechanism 100, an A-axis liquid inlet 206 and an A-axis liquid outlet 207 are provided on the A-axis rotation mechanism 200, a diagonal mirror liquid inlet 408, a diagonal mirror liquid outlet 409, a focusing mirror liquid inlet 410, and a focusing mirror 405 liquid outlet are provided on the swing axis mechanism 400. The collimator liquid inlet 105, the collimator cooling pipe, the collimator liquid outlet 106, the A-axis liquid inlet 206, the mirror cooling pipe, the A-axis liquid outlet 207, the diagonal mirror liquid inlet 408, the diagonal mirror cooling pipe, the diagonal mirror liquid outlet 409, the focusing mirror liquid inlet 410, the focusing mirror cooling pipe, and the focusing mirror 405 liquid outlet are connected in sequence.

[0039] Furthermore, the collimation mechanism 100 further includes a collimation adjustment assembly 104 for controlling the incident angle of the laser entering the mirror assembly 300; the collimator mirror base 102 is connected to the A-axis rotation mechanism 200 through the collimation adjustment assembly 104. The collimation adjustment assembly 104 can be used to adjust the laser beam so that it is at the center of the optical channel and remains in the vertical direction.

[0040] Optionally, the collimation adjustment assembly 104 includes a movable plate 1041, a fixed plate 1042, an adjustment nut, and a reference nut. The collimator mirror base 102 is installed on the movable plate 1041. The reference nut is fixed between the movable plate 1041 and the fixed plate 1042. The fixed plate 1042 is connected to the A-axis rotation mechanism 200. The adjustment nut is movably connected between the movable plate 1041 and the fixed plate 1042. The incident angle of the laser entering the mirror assembly 300 connected to the A-axis rotation assembly is controlled by the adjustment nut.

[0041] The collimation mechanism 100 may further include an optical fiber output component 101. The optical fiber output component 101 is installed on the collimator mirror base 102. The optical fiber output component 101 and the collimator 103 can make the laser divergent light form parallel light after focusing. The optical fiber output component 101 can be selected as a QBH component.

[0042] An optical channel is formed between the collimator mirror base 102 and the collimation adjustment assembly 104, and the laser output by the optical fiber output device can enter the mirror assembly 300 from this optical channel.

[0043] In a refined embodiment, the A-axis slewing mechanism 200 includes an A-axis body 203 and an A-axis hollow turntable 205; the A-axis body 203 is connected to the A-axis hollow turntable 205; the rotating end of the A-axis hollow turntable 205 is detachably connected to the swing-axis mechanism 400. The swing-axis mechanism 400 is driven by the A-axis hollow turntable 205 to rotate around the A-axis. Further, it also includes an A-axis drive device 204 installed on the A-axis body 203, and the A-axis hollow turntable 205 is driven to rotate by the A-axis drive device 204.

[0044] Further, the A-axis slewing mechanism 200 also includes a mounting flange 201 and an adjustment plate 202. The mounting body is installed on the adjustment plate 202 and then combined with the mounting flange 201 through the adjustment bolt assembly on the mounting flange 201. The adjustment bolt assembly preferably consists of a set of reference nuts and three sets of adjustment nuts, and the axis of the body is adjusted to be perpendicular to the ground through the adjustment nuts.

[0045] Preferably, the A-axis body 203 is hollow to form a light channel, which is communicated with the swing-axis mechanism 400 through the hollow part of the A-axis hollow turntable 205. The mirror assembly 300 is installed on the A-axis body 203, and the reflecting surface of the mirror 302 is located in the light channel of the A-axis body 203, so that the laser enters the swing-axis mechanism 400 through the A-axis body 203, the mirror 302, and the A-axis hollow turntable 205.

[0046] In another embodiment, the swing-axis mechanism 400 includes a swing-axis body 401. One end of the swing-axis body 401 is connected to the A-axis slewing mechanism 200, and the other end is provided with a nozzle 407. The swing-axis body 401 is hollow to form a light channel. The inclined mirror assembly is installed at one end of the swing-axis body 401 close to the A-axis slewing mechanism 200, and the reflecting surface of the inclined mirror 403 is located in the light channel of the swing-axis body 401. The focusing mirror assembly is installed at one end of the swing-axis body 401 close to the nozzle 407, and the focusing mirror 405 is installed in the light channel of the swing-axis body 401. The laser reflected by the mirror assembly 300 enters the light channel of the swing-axis body 401, is reflected by the inclined mirror assembly to the focusing mirror assembly, and the focusing mirror assembly forms a focused light, which is emitted from the nozzle 407 to form a focus on the surface of the object to be cut for cutting.

[0047] Preferably, the swing-axis mechanism 400 also includes a sensor 406, and the sensor 406 is installed on the swing-axis body 401, close to one end of the nozzle 407.

[0048] In order to protect the rotating mechanism from greater damage and reduce losses when the cutting head collides with the workpiece, the high-power laser cutting head further includes an anti-collision mechanism 500; the anti-collision mechanism 500 includes a first anti-collision part 501 and a second anti-collision part 504; the connection between the first anti-collision part 501 and the second anti-collision part 504 is a disconnectable connection, preferably attracted by a magnet 503; the first anti-collision part 501 is connected to the A-axis rotation mechanism 200; the second anti-collision part 504 is connected to the swing axis mechanism 400. When the cutting head collides, the second anti-collision part 504 falls off, and the swing axis mechanism 400 is separated from the A-axis rotation mechanism 200, protecting the A-axis rotation mechanism 200 and other components.

[0049] Specifically, an upper circuit board, an electromagnet 503, and a lower circuit board are provided between the first anti-collision part 501 and the second anti-collision part 504. The upper circuit board and the electromagnet 503 are fixed on the first anti-collision part 501, and the lower circuit board is fixed on the second anti-collision part 504. The upper circuit board and the lower circuit board are connected by contacts. When the swing axis mechanism 400 collides with the workpiece being processed, a displacement occurs between the first anti-collision part 501 and the second anti-collision part 504, the contacts are disconnected, and the swing axis mechanism 400 is separated from the A-axis rotation mechanism 200.

[0050] Preferably, a proximity switch 502 is installed on the first anti-collision part 501; the proximity switch 502 shuts down the high-power laser cutting head by sending a signal to prevent greater losses.

[0051] The above examples are only illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design identical or similar to the present invention falls within the protection scope of the present invention.

Claims

1. A high power laser cutting head, characterized in that: The invention comprises a swing shaft mechanism (400) and an A-axis rotating mechanism (200) for driving the swing shaft mechanism (400) to rotate around an A-axis; a reflector assembly (300) is mounted on the A-axis rotating mechanism (200); an oblique reflector assembly and a focusing mirror assembly are mounted on the swing shaft mechanism (400); the reflector assembly (300), the oblique reflector assembly and the focusing mirror assembly are arranged in sequence along an optical path; a reflector cooling pipe is arranged on the reflector assembly (300); an oblique reflector cooling pipe is arranged on the oblique reflector assembly; and a focusing mirror cooling pipe is arranged on the focusing mirror assembly.

2. The high-power laser cutting head according to claim 1, characterized in that: The reflector assembly (300) comprises a reflector seat (301) and a reflector (302); the reflector seat (301) is mounted on the A-axis rotary mechanism (200); the reflector (302) is mounted on the reflector seat (301); and the reflector cooling pipeline is wound inside the reflector seat (301).

3. The high power laser cutting head according to claim 1, characterized in that: The oblique reflecting mirror assembly comprises an oblique reflecting mirror seat (402) and an oblique reflecting mirror (403); the oblique reflecting mirror seat (402) is mounted on the swing shaft mechanism (400); the oblique reflecting mirror (403) is mounted on the oblique reflecting mirror seat (402); and the oblique reflecting mirror cooling pipeline is wound inside the oblique reflecting mirror seat (402).

4. The high-power laser cutting head according to claim 1, characterized in that: The focusing mirror assembly comprises a focusing mirror seat (404) and a focusing mirror (405); the focusing mirror seat (404) is mounted on the swing shaft mechanism (400); the focusing mirror (405) is mounted on the focusing mirror seat (404); and the focusing mirror cooling pipeline is wound inside the focusing mirror seat (404).

5. The high power laser cutting head according to claim 1, characterized in that: It also comprises a collimating mechanism (100); the collimating mechanism (100) is connected to the A-axis rotating mechanism (200).

6. The high-power laser cutting head according to claim 5, characterized in that: The collimating mechanism (100) comprises a collimating mirror seat (102) and a collimating mirror (103); the collimating mirror seat (102) is connected to the A-axis rotating mechanism (200); and the collimating mirror (103) is mounted on the collimating mirror seat (102).

7. The high power laser cutting head according to claim 6, characterized in that: A collimator mirror cooling pipe is arranged inside the collimator mirror seat (102).

8. The high power laser cutting head as claimed in claim 6, characterized in that: The collimation mechanism (100) further comprises a collimation adjustment component (104) for controlling the incident angle of the laser entering the reflector component (300); the collimation mirror seat (102) is connected to the A-axis rotation mechanism (200) via the collimation adjustment component (104).

9. The high power laser cutting head according to claim 1, characterized in that: The A-axis rotating mechanism (200) comprises an A-axis body (203) and an A-axis hollow turntable (205); the A-axis body (203) is connected to the A-axis hollow turntable (205); and the rotating end of the A-axis hollow turntable (205) is detachably connected to the swing shaft mechanism (400).

10. The high power laser cutting head according to claim 1, characterized in that: The invention also comprises an anti-collision mechanism (500); the anti-collision mechanism (500) comprises a first anti-collision part (501) and a second anti-collision part (504); the first anti-collision part (501) and the second anti-collision part (504) are disconnectably connected; the first anti-collision part (501) is connected to the A-axis rotation mechanism (200); and the second anti-collision part (504) is connected to the swing shaft mechanism (400).

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