Laser focusing mechanism and laser processing equipment
By setting up a visible laser generator and a lifting frame in the laser processing equipment, the laser beam spots are made to overlap, which solves the problem of complex focusing in existing laser processing equipment and realizes a laser processing equipment that simplifies focusing operations and improves safety.
Patent Information
- Application Number
- CN202422891388.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-11-25
AI Technical Summary
Existing laser processing equipment has complex focusing operations that require specialized skills and may cause eye damage to operators, thus limiting its application.
A laser focusing mechanism is adopted. By setting a visible laser generator on the laser head, at least two light paths intersect each other, the focal plane position is predetermined, and the position of the laser head is adjusted by the lifting frame to make the visible laser beam spots overlap, simplifying the focusing process.
It achieves a simple and convenient focusing process, reduces the professional skill requirements for operators, has wide applicability, and improves focusing efficiency and safety.
Smart Images
Figure CN223588526U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of laser processing, in particular to a laser focusing mechanism and a laser processing device. BACKGROUND
[0002] The laser processing device is a device for performing processing operations such as engraving and cutting on materials by using a laser beam. In the process of using the laser processing device to process materials, the positioning and adjustment of the laser focal point directly affect the working efficiency and processing quality of the laser processing device. The existing laser processing device usually adopts the method of actually processing a certain material, observing the changes of the laser beam or the processing sample effect by different distances of positive and negative defocusing, and judging the position of the focal length. Although this method can realize focusing, it needs to actually perform processing operations and the operator needs to have high professional skills, which limits the use range of the laser processing device, increases the complexity of the focusing operation, reduces the focusing efficiency, and may also cause harm to the eyes of the operator during the operation process.
[0003] Therefore, it is necessary to provide a laser focusing mechanism and a laser processing device which are relatively simple, easy to operate and have low professional requirements for the operator. CONTENT OF THE INVENTION
[0004] The purpose of the present application is to solve the above problems and provide a laser focusing mechanism and a laser processing device which are simple in structure, simple in operation principle, easy to operate and high in focusing operation efficiency.
[0005] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows:
[0006] In a first aspect, the present application provides a laser focusing mechanism, which comprises a laser head, at least one visible laser generator, and a lifting frame; the visible laser generator is arranged on the laser head, at least two visible laser beams emitted from the laser head and the visible laser generator intersect with each other, the laser head is arranged on the lifting frame, and the lifting frame is configured to drive the laser head to move in the Z direction and make the light spots of the visible laser beams coincide to complete focusing.
[0007] Optionally, the visible laser generator is arranged on the laser head at a preset angle; initially, the visible laser beams intersect and coincide to form an initial focal point.
[0008] Optionally, the preset angle is 65° to 75°.
[0009] Optionally, the laser head is configured to emit a first visible laser beam along the z direction; the visible laser generator is provided in a number of 1, and the visible laser beam emitted by the visible laser generator is a second visible laser beam; the optical path of the second visible laser beam is tilted from the emission end of the visible laser generator towards the direction close to the first visible laser beam.
[0010] Optionally, the laser head is configured to emit a first visible laser beam along the z direction; the visible laser generator is provided in a number of 1, and the visible laser beam emitted by the visible laser generator is a second visible laser beam; the optical path of the second visible laser beam is tilted from the emission end of the visible laser generator towards the direction close to the first visible laser beam.
[0011] Optionally, the laser focusing mechanism further comprises a machining table, which is configured to place a material to be machined, and the emission end of the laser head and the visible laser generator faces the machining table, and the laser head moves along the z direction to approach or move away from the machining table under the drive of the lifting frame.
[0012] Optionally, the laser focusing mechanism further comprises a visual detection unit, which is configured to detect the distribution of the light spot projected by the visible laser beam.
[0013] Optionally, the laser focusing mechanism further comprises a control unit, which is electrically connected with the visual detection unit and the lifting frame, respectively, and the control unit controls the adjustment of the position of the laser head by the lifting frame according to the detection result transmitted by the visual detection unit.
[0014] Optionally, the wavelength of the visible laser beam is 380-780 nm.
[0015] In a second aspect, the present application provides a laser machining device comprising the laser focusing mechanism as described above.
[0016] The present application has at least the following beneficial effects:
[0017] The laser focusing mechanism described in the application is provided with a visible laser generator on the laser head, at least two visible laser beams intersecting each other are emitted from the laser head and the visible laser generator, the position of the focal plane is determined in advance before delivery, and the visible laser generator is adjusted to a preset angle and the light spots of the visible laser beams are overlapped; in the subsequent use process, after the material to be processed of different thicknesses is replaced, the user only needs to adjust the laser head up and down through the lifting frame according to the thickness of the material to be processed, so that the light spots of the visible laser beams are overlapped on the surface of the material to be processed, so as to complete the focusing; the laser focusing mechanism described in the application does not need actual processing and subsequent effect observation to determine the focal length position and other tedious operations in the focusing process, the focusing operation is simple, the professional requirement of the operator is low, and the applicability is wide. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 The structure schematic diagram of the laser focusing mechanism when the laser head of the application emits visible laser beams;
[0019] Figure 2 The structure schematic diagram of the laser focusing mechanism when the laser head of the application emits invisible laser beams;
[0020] Figure 3 The working principle schematic diagram of the laser focusing mechanism of the application;
[0021] Figure 4 The flow chart of the laser focusing mechanism of the application.
[0022] Wherein, 1-laser head, 2-visible laser generator, 3-lifting frame, 4-first visible laser beam, 5-second visible laser beam, 6-third visible laser beam, 7-fourth visible laser beam, 8-processing table, 9-vision detection unit, 10-control unit. DETAILED DESCRIPTION
[0023] In order to facilitate the understanding of the application, the application will be described more fully below with reference to the related drawings. The preferred embodiments of the application are shown in the drawings. However, the application can be realized in many different forms and is not limited to the embodiments described in the application. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.
[0024] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element.
[0025] The description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features.
[0026] In the description of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the purpose of facilitating the description of the present application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0027] Embodiments:
[0028] In a first aspect, the present application provides a laser focusing mechanism, as shown in Figure 1 and Figure 2 , which comprises a laser head 1, at least one visible laser generator 2, and a lifting frame 3; the visible laser generator 2 is arranged on the laser head 1, at least two visible laser beams with intersecting light paths are emitted from the laser head 1 and the visible laser generator 2, the laser head 1 is arranged on the lifting frame 3, and the lifting frame 3 is configured to drive the laser head 1 to move along the Z direction and make the light spots of the visible laser beams coincide to complete focusing.
[0029] The laser focusing mechanism described in the present application sets the visible laser generator 2 on the laser head 1, at least two visible laser beams with intersecting light paths are emitted from the laser head 1 and the visible laser generator 2, the position of the focal plane is determined before leaving the factory during use, and the visible laser generator 2 is adjusted to a preset angle and the light spots of the visible laser beams are made to coincide; as shown in Figure 4 , in the subsequent use process, after replacing different thicknesses of materials to be processed, the user only needs to adjust the laser head 1 by the lifting frame 3 according to the thickness of the material to be processed, so that the light spots of the visible laser beams coincide on the surface of the material to be processed to complete focusing; the laser focusing mechanism described in the present application does not need actual processing and subsequent effect observation to judge the focal length position and other tedious operations during focusing, the focusing operation is simple, the professional requirement of the operator is low, and the applicability is wide.
[0030] The visible laser generator 2 is inclined at a preset angle on the laser head 1; initially, the visible laser beams intersect and coincide to form an initial focal point.
[0031] The preset angle is 65° to 75°.
[0032] The preset angle is related to the distance between the light emitting center of the laser head 1 and the light emitting center of the visible laser generator 2 and the working distance of the laser head 1. When the laser head 1 and the visible laser generator 2 intersect at a focal point, the focal point, the light emitting center of the laser head 1 and the light emitting center of the visible laser generator 2 form a right triangle. The distance between the light emitting center of the laser head 1 and the light emitting center of the visible laser generator 2 is denoted as a, the working distance of the laser head 1 is denoted as b, the preset angle is denoted as θ, a and b correspond to the values of two right angle sides of the right triangle respectively, and thus the calculation formula of the preset angle is θ = arctan(b / a). For example, in the embodiment of the application, a is 85 mm, b is 180 mm to 300 mm, and θ is 65° to 75° obtained by calculation. Specifically, for example, when b is 180 mm, 230 mm, 250 mm, 280 mm and 300 mm respectively, the corresponding inverse trigonometric function values are 1.130, 1.217, 1.243, 1.276 and 1.295 respectively, and the corresponding θ values are 64.722°, 69.717°, 71.222°, 73.113° and 74.181° respectively.
[0033] Optionally, in the laser focusing mechanism, the laser head 1 and the visible laser generator 2 can be installed in various matching modes. For example:
[0034] In some embodiments, referring to FIG. 1, Figure 1 As shown in the figure, the laser head 1 is configured to emit a first visible laser beam 4 along the z direction; the visible laser generator 2 is provided in a number of 1, and the visible laser beam emitted by the visible laser generator 2 is a second visible laser beam 5; the light path of the second visible laser beam 5 is inclined from the emission end of the visible laser generator 2 to the direction close to the first visible laser beam 4. It should be noted that the z direction is parallel to the z axis direction in the spatial coordinate system. Optionally, the visible laser generator 2 is installed on the lower surface of the laser head 1 at a preset angle. In use, during the debugging before the device is shipped, the position of the focal plane is first determined, and then the visible laser generator 2 is installed on the lower surface of the laser head 1 at a preset angle, so that when the focal plane is reached, the two light spots of the first visible laser beam 4 emitted vertically by the laser head 1 and the second visible laser beam 5 emitted obliquely by the visible laser generator 2 just coincide, that is, the focusing is completed. During the processing, the user adjusts the position of the laser head 1 through the lifting frame 3 according to the thickness of the material to be processed, and adjusts the focusing by controlling the lifting movement of the laser head 1 along the z direction, so that the light spots of the first visible laser beam 4 and the second visible laser beam 5 projected on the surface of the material to be processed coincide.
[0035] In still other embodiments, referring to FIG. 2, Figure 2As shown, the laser head 1 is configured to emit an invisible laser beam along the z direction; the number of visible laser generators 2 is 2, the visible laser generators 2 are oppositely arranged along the radial direction of the laser head 1 and emit a third visible laser beam 6 and a fourth visible laser beam 7, the light paths of the third visible laser beam 6 and the fourth visible laser beam 7 are respectively inclined from the emission end of the visible laser generator 2 to the direction close to the invisible laser beam. In use, the visible laser generators 2 are respectively installed at both sides of the lower surface of the laser head 1 at a preset angle. In use, during the debugging of the equipment before leaving the factory, the position of the focal plane is first determined, so that when the visible laser generators 2 are in the focal plane, the light spots of the two visible laser beams emitted by the two visible laser generators 2 just coincide, that is, the focusing is completed. During the processing, the user adjusts the lifting frame to drive the laser head 1 to move up and down along the z direction according to the thickness of the material to be processed, thereby driving the visible laser generators 2 to move along the z direction so that the light spots of the third visible laser beam 6 and the fourth visible laser beam 7 projected on the surface of the material to be processed coincide, to complete the focusing operation.
[0036] In other embodiments, the laser focusing mechanism further comprises a visual detection unit 9 and a control unit 10, as shown in Figure 3 As shown, the control unit 10 is electrically connected with the visual detection unit 9 and the lifting frame 3 respectively, the visual detection unit 9 is configured to detect the distribution of the light spot projected by the visible laser beam, and the control unit 10 controls the position of the laser head 1 by the lifting frame 3 according to the detection result transmitted by the visual detection unit 9. The laser focusing mechanism realizes automatic control between the visual detection unit 9 and the control unit 10, and in actual use, the coincidence of the light spot is judged by combining the visual algorithm, the lifting frame 3 is automatically controlled, and then the automatic focusing operation is realized, without manual operation, which improves the efficiency and accuracy of the focusing operation, improves the convenience of use and user experience. Optionally, the visual detection unit comprises a CCD camera arranged on the processing table 8, and the CCD camera is configured to acquire the image of the light spot projected on the processing table 8.
[0037] The wavelength of the visible laser beam is 380-780nm. For example, the visible laser beam can be blue light with a wavelength of 450nm or red light with a wavelength of 650nm, so as to achieve the effect of emitting weak and non-stinging visible light.
[0038] On the other hand, the present application provides a laser processing equipment comprising the laser focusing mechanism as described above.
[0039] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, as long as the combinations do not conflict with each other, they should be construed to be within the scope of the present disclosure.
[0040] The above embodiments only express the preferred embodiments of the present application, which are described in a more specific and detailed manner, but should not be construed as limiting the scope of the patent application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.
Claims
1. A laser focusing mechanism, characterized by: The laser focusing mechanism comprises a laser head, at least one visible laser generator, and a lifting frame; the visible laser generator is arranged on the laser head, at least two visible laser beams emitted from the laser head and the visible laser generator intersect with each other, the laser head is arranged on the lifting frame, and the lifting frame is configured to drive the laser head to move along the Z direction and make the light spots of the visible laser beams coincide to complete focusing.
2. The laser focusing mechanism of claim 1, wherein: The visible laser generator is arranged on the laser head at a preset angle; initially, the visible laser beams intersect with each other to form an initial focal point.
3. The laser focusing mechanism of claim 2, wherein: The preset angle is 65° to 75°.
4. The laser focusing mechanism of claim 1, wherein: The laser head is configured to emit a first visible laser beam along the Z direction; the number of visible laser generators is one, and the visible laser generator emits a second visible laser beam; the optical path of the second visible laser beam is inclined from the emission end of the visible laser generator to the direction close to the first visible laser beam.
5. The laser focusing mechanism of claim 1, wherein: The laser head is configured to emit an invisible laser beam along the Z direction; the number of visible laser generators is two, the visible laser generators are arranged opposite to each other along the radial direction of the laser head and emit a third visible laser beam and a fourth visible laser beam, and the optical paths of the third visible laser beam and the fourth visible laser beam are respectively inclined from the emission ends of the visible laser generators to the direction close to the invisible laser beam.
6. The laser focusing mechanism of claim 1, wherein: The laser focusing mechanism further comprises a processing table, which is configured to place a material to be processed, the emission ends of the laser head and the visible laser generator face the processing table, and the laser head moves along the Z direction to approach or move away from the processing table under the drive of the lifting frame.
7. The laser focusing mechanism of claim 6, wherein: The laser focusing mechanism further comprises a visual detection unit, which is configured to detect the distribution of the light spots projected by the visible laser beams.
8. The laser focusing mechanism of claim 7, wherein: The laser focusing mechanism further comprises a control unit, which is electrically connected with the visual detection unit and the lifting frame, respectively, and controls the position of the laser head according to the detection result transmitted by the visual detection unit.
9. The laser focusing mechanism of claim 1, wherein: The wavelength of the visible laser beam is 380-780 nm.
10. A laser processing apparatus characterized by comprising: The laser focusing mechanism comprises the laser focusing mechanism according to any one of claims 1-9.