An adaptive focal length adjusting device of a laser cutting machine

Abstract

The utility model relates to laser cutting machine technical field discloses a kind of adaptive focal length adjusting device of laser cutting machine, including installation cylinder, the bottom of installation cylinder is fixedly connected with distance sensor, the inner wall of installation cylinder is connected with adjusting cylinder and slides through, the inner wall of adjusting cylinder is hinged with swivel ring, the inner wall of swivel ring is placed with lens, the inner wall of installation cylinder is provided with adjusting mechanism, the side wall of swivel ring is provided with positioning mechanism.In the utility model, the distance between installation cylinder and the workpiece to be cut is monitored in real time by the distance sensor and fed back to the control room, and the height of the lens can be adjusted by starting the motor in cooperation with the worm, worm gear, shaft, turntable, connecting rod, adjusting cylinder and swivel ring. When the distance between the installation cylinder and the workpiece changes, the focal length of the lens can be quickly adjusted, so that the laser emission end of the laser cutting machine can better cut the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting machine technology, and in particular to an adaptive focal length adjustment device for a laser cutting machine. Background Technology

[0002] A laser cutting machine uses a laser beam emitted from a laser source, which is focused into a high-power-density laser beam through an optical path system. The laser beam irradiates the surface of the workpiece, causing the workpiece to reach its melting or boiling point. Simultaneously, high-pressure gas coaxial with the beam blows away the molten or vaporized metal. As the relative position of the beam and the workpiece moves, a kerf is eventually formed in the material, thus achieving the purpose of cutting.

[0003] A search revealed Chinese Patent Publication No. CN213729924U, which discloses a focal height adjustment device for laser cutting machine processing. This device allows the focal length adjustment cylinder to move within the adjustment frame by loosening the fastening nut. Rotating the second adjustment button allows for a wider range of vertical adjustment of the focal length adjustment cylinder, with a faster adjustment speed, suitable for coarse adjustments. Rotating the first adjustment button allows for a smaller range of vertical adjustment of the focal length adjustment cylinder, with a slower adjustment speed but higher precision, suitable for precise adjustments. This device for adjusting the focal height of a laser cutting machine is easy to operate, simple and practical, and can accurately control the adjustment of precision, making it highly valuable.

[0004] The aforementioned device can achieve coarse and fine adjustment of the focus point through two sets of gears of different sizes. However, both coarse and fine adjustments require manual operation. After the operation is completed, the focus adjustment cylinder needs to be locked by tightening the nut. Manual control can only be performed when the equipment is stopped, which is not only very troublesome, but also reduces the working efficiency of the equipment. Therefore, an adaptive focus adjustment device for laser cutting machines is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an adaptive focal length adjustment device for a laser cutting machine, which aims to improve the problem mentioned in the prior art that "focal length adjustment needs to be manually controlled, which is very troublesome and seriously affects processing efficiency".

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an adaptive focal length adjustment device for a laser cutting machine, comprising a mounting cylinder, a distance sensor fixedly connected to the bottom of the mounting cylinder, an adjustment cylinder slidably connected through the inner wall of the mounting cylinder, a rotating ring hinged to the inner wall of the adjustment cylinder, a lens placed on the inner wall of the rotating ring, an adjustment mechanism provided on the inner wall of the mounting cylinder, and a positioning mechanism provided on the side wall of the rotating ring.

[0007] The adjusting mechanism includes a rotating shaft, one end of which is rotatably connected to the inner wall of the mounting cylinder, and the other end of which is fixedly connected to a turntable. A connecting rod is hinged to the side of the turntable away from the rotating shaft. A worm gear is fixedly connected to the outer wall of the rotating shaft. A motor is fixedly connected to the bottom of the mounting cylinder, and a worm is fixedly connected to the output end of the motor.

[0008] As a further description of the above technical solution:

[0009] The positioning mechanism includes a slider that is slidably connected to the side wall of the rotating ring, and a limit rod is fixedly connected to the top of the slider.

[0010] As a further description of the above technical solution:

[0011] The inner wall of the adjusting cylinder is provided with a limiting groove for the insertion of the limiting rod.

[0012] As a further description of the above technical solution:

[0013] The inner wall of the regulating cylinder is provided with a through groove, which is connected to the inside of the limiting groove.

[0014] As a further description of the above technical solution:

[0015] A spring is fixedly connected to the side wall of the slider, and the end of the spring away from the slider is fixedly connected to the inner wall of the rotating ring.

[0016] As a further description of the above technical solution:

[0017] The end of the worm gear away from the motor passes through the mounting cylinder and extends into the interior of the mounting cylinder, and the worm gear meshes with the worm wheel.

[0018] As a further description of the above technical solution:

[0019] The end of the connecting rod furthest from the turntable is hinged to the top of the adjusting cylinder.

[0020] As a further description of the above technical solution:

[0021] The rotating shaft and the turntable are coaxial, and the hinge point between the connecting rod and the turntable is offset from the axis of the rotating shaft.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the distance between the mounting cylinder and the workpiece to be cut is monitored in real time by a distance sensor and fed back to the control room. By starting the motor and cooperating with the worm gear, worm wheel, rotating shaft, turntable, connecting rod, adjusting cylinder and rotating ring, the height of the lens can be adjusted so that when the distance between the mounting cylinder and the workpiece changes, the focal length of the lens can be quickly adjusted so that the laser emitting end of the laser cutting machine can cut the workpiece better.

[0024] 2. In this utility model, the rotating ring allows for easy replacement of the internal lens, enabling the selection of a suitable lens model based on the requirements of the laser cutting machine. Simultaneously, the positioning mechanism can fix the position of the rotating ring, ensuring that the internal lens remains stable within the adjusting cylinder. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the unfolded structure of the rotating ring of this utility model;

[0027] Figure 3 This is a cross-sectional structural diagram of the mounting cylinder and adjusting cylinder of this utility model;

[0028] Figure 4 This utility model Figure 1 A magnified structural diagram at point A;

[0029] Figure 5 This utility model Figure 3 A magnified structural diagram at point B.

[0030] Legend:

[0031] 1. Mounting cylinder; 2. Distance sensor; 3. Adjusting cylinder; 4. Rotary ring; 5. Lens; 6. Adjusting mechanism; 61. Rotating shaft; 62. Turntable; 63. Connecting rod; 64. Worm gear; 65. Motor; 66. Worm; 7. Positioning mechanism; 71. Slider; 72. Limiting rod; 73. Limiting groove; 74. Through groove; 75. Spring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-3This utility model provides an embodiment of an adaptive focal length adjustment device for a laser cutting machine, comprising a mounting cylinder 1, which is fixed to the laser emitting end of the laser cutting machine by bolts. A distance sensor 2 is fixedly connected to the bottom of the mounting cylinder 1. The distance sensor 2 can be a (KEYENCE) IL-1000 series. During use, the distance sensor 2 monitors the distance between the mounting cylinder 1 and the object to be cut in real time. When the distance is abnormal, the distance sensor 2 sends a signal to the control room. An adjustment cylinder 3 is slidably connected through the inner wall of the mounting cylinder 1. A rotating ring 4 is hinged to the inner wall of the adjustment cylinder 3. A lens 5 is placed on the inner wall of the rotating ring 4. An adjustment mechanism 6 is provided on the inner wall of the mounting cylinder 1. A positioning mechanism 7 is provided on the side wall of the rotating ring 4.

[0034] Reference Figure 2 , Figure 3 and Figure 5 The adjusting mechanism 6 includes a rotating shaft 61. One end of the rotating shaft 61 is rotatably connected to the inner wall of the mounting cylinder 1. When the worm gear 66 rotates, it works with the worm wheel 64 to drive the rotating shaft 61 to rotate on the inner wall of the mounting cylinder 1. The other end of the rotating shaft 61 is fixedly connected to a turntable 62. The rotating shaft 61 and the turntable 62 are coaxial. When the rotating shaft 61 rotates, it drives the turntable 62 to rotate synchronously. A connecting rod 63 is hinged to the side of the turntable 62 away from the rotating shaft 61. The hinge point between the connecting rod 63 and the turntable 62 is offset from the axis of the rotating shaft 61. The end of the connecting rod 63 away from the turntable 62 is hinged to the top of the adjusting cylinder 3. The rotating disc 62, in conjunction with the connecting rod 63, can drive the adjusting cylinder 3 to slide on the inner wall of the mounting cylinder 1. A worm gear 64 is fixedly connected to the outer wall of the rotating shaft 61. A motor 65 is fixedly connected to the bottom of the mounting cylinder 1. A worm 66 is fixedly connected to the output end of the motor 65. Starting the motor 65 can drive the worm 66 to rotate. The end of the worm 66 away from the motor 65 passes through the mounting cylinder 1 and extends into the interior of the mounting cylinder 1. The worm 66 is rotatably connected to the penetration point of the mounting cylinder 1. The worm 66 meshes with the worm gear 64. When the worm 66 rotates, it will drive the worm gear 64 that meshes with it to rotate.

[0035] Reference Figure 4The positioning mechanism 7 includes a slider 71, which is slidably connected to the side wall of the rotating ring 4. When the slider 71 is limited, the rotating ring 4 can be fixed inside the adjusting cylinder 3. A limiting rod 72 is fixedly connected to the top of the slider 71. A limiting groove 73 is provided on the inner wall of the adjusting cylinder 3 for the limiting rod 72 to be inserted. With the cooperation of the limiting groove 73 and the limiting rod 72, the slider 71 can be limited. A through groove 74 is provided on the inner wall of the adjusting cylinder 3. The through groove 74 communicates with the inside of the limiting groove 73. The limiting rod 72 can enter into or move out of the limiting groove 73 through the through groove 74. A spring 75 is fixedly connected to the side wall of the slider 71. The end of the spring 75 away from the slider 71 is fixedly connected to the inner wall of the rotating ring 4. The elasticity of the spring 75 can drive the slider 71 to slide and reset on the side wall of the rotating ring 4.

[0036] Working Principle: During operation, the distance sensor 2 monitors the distance between the mounting cylinder 1 and the workpiece in real time. When an abnormality occurs in the distance, the distance sensor 2 sends a signal to the control room, whereby the operator starts the motor 65 to drive the worm gear 66 to rotate. Simultaneously, the worm gear 66 drives the meshing worm wheel 64 to rotate. The worm wheel 64 then drives the rotating shaft 61 to rotate on the inner wall of the mounting cylinder 1. The rotating shaft 61, in turn, drives the turntable 62 to rotate synchronously. The rotating turntable 62, in turn, pushes the connecting rod 63, causing the connecting rod 63 to push the adjusting cylinder 3. The adjusting cylinder 3 then slides on the inner wall of the mounting cylinder 1. Simultaneously, the adjusting cylinder 3 drives the rotating ring 4 to move synchronously. The movement of the rotating ring 4 allows for adjustment of the height of the lens 5, thereby adjusting the focal length of the lens 5. This enables rapid adjustment of the focal length of the lens 5 when the distance between the mounting cylinder 1 and the workpiece changes, allowing the laser emitting end of the laser cutting machine to better cut the workpiece.

[0037] By pushing the slider 71 to slide on the side wall of the rotating ring 4 and stretching the spring 75, the slider 71 will drive the limiting rod 72 to move differently on the inner wall of the limiting groove 73. When the limiting rod 72 moves to the through groove 74, the slider 71 can be pulled outward. At this time, the slider 71 will drive the limiting rod 72 to move out of the through groove 74. At the same time, the slider 71 will drive the rotating ring 4 to rotate out of the inside of the adjusting cylinder 3. At this time, the lens 5 placed inside the rotating ring 4 can be removed so that the appropriate model of lens 5 can be replaced according to the use requirements of the laser cutting machine, which facilitates the replacement of lens 5.

[0038] After the lens 5 is replaced, the rotating ring 4 is rotated into the interior of the adjusting cylinder 3. At the same time, the slider 71 is pushed so that it drives the limiting rod 72 through the through groove 74 into the interior of the limiting groove 73. At this time, the limiting groove 73 and the limiting rod 72 can limit the slider 71, so that the slider 71 can limit the rotating ring 4, thereby fixing the rotating ring 4 inside the adjusting cylinder 3, and thus completing the installation of the rotating ring 4.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adaptive focus adjustment device for a laser cutting machine, comprising a mounting cylinder (1), characterized in that: A distance sensor (2) is fixedly connected to the bottom of the mounting cylinder (1). An adjusting cylinder (3) is slidably connected through the inner wall of the mounting cylinder (1). A rotating ring (4) is hinged to the inner wall of the adjusting cylinder (3). A lens (5) is placed on the inner wall of the rotating ring (4). An adjusting mechanism (6) is provided on the inner wall of the mounting cylinder (1). A positioning mechanism (7) is provided on the side wall of the rotating ring (4). The adjusting mechanism (6) includes a rotating shaft (61), one end of which is rotatably connected to the inner wall of the mounting cylinder (1), and the other end of which is fixedly connected to a turntable (62). A connecting rod (63) is hinged to the side of the turntable (62) away from the rotating shaft (61). A worm gear (64) is fixedly connected to the outer wall of the rotating shaft (61). A motor (65) is fixedly connected to the bottom of the mounting cylinder (1), and a worm (66) is fixedly connected to the output end of the motor (65).

2. The adaptive focal length adjustment device for a laser cutting machine according to claim 1, characterized in that: The positioning mechanism (7) includes a slider (71) which is slidably connected to the side wall of the rotating ring (4), and a limit rod (72) is fixedly connected to the top of the slider (71).

3. The adaptive focal length adjustment device for a laser cutting machine according to claim 1, characterized in that: The inner wall of the adjusting cylinder (3) is provided with a limiting groove (73) for the insertion of the limiting rod (72).

4. The adaptive focal length adjustment device for a laser cutting machine according to claim 3, characterized in that: The inner wall of the regulating cylinder (3) is provided with a through groove (74), which is connected to the inside of the limiting groove (73).

5. The adaptive focal length adjustment device for a laser cutting machine according to claim 2, characterized in that: A spring (75) is fixedly connected to the side wall of the slider (71), and the end of the spring (75) away from the slider (71) is fixedly connected to the inner wall of the rotating ring (4).

6. The adaptive focal length adjustment device for a laser cutting machine according to claim 1, characterized in that: The end of the worm (66) away from the motor (65) passes through the mounting cylinder (1) and extends into the interior of the mounting cylinder (1), and the worm (66) meshes with the worm wheel (64).

7. The adaptive focal length adjustment device for a laser cutting machine according to claim 1, characterized in that: The end of the connecting rod (63) away from the turntable (62) is hinged to the top of the adjusting cylinder (3).

8. The adaptive focal length adjustment device for a laser cutting machine according to claim 1, characterized in that: The rotating shaft (61) and the turntable (62) are coaxial, and the hinge point of the connecting rod (63) and the turntable (62) is offset from the axis of the rotating shaft (61).

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