Two-stage variable light spot laser cutting head mechanism

Abstract

The utility model discloses a two-stage variable light spot laser cutting head mechanism which comprises a laser light source, a main cavity, a focus lens group mounting cavity and a focus lens group, a laser light source is installed in the middle of the upper end of the main cavity, a collimating lens installation bin is arranged below the main cavity, a collimating lens set frame is placed in the collimating lens installation bin, a displacement motor installed on the front face of the collimating lens installation bin drives the collimating lens set frame to rotate through a motor shaft, and a focusing lens set installation cavity is installed at the bottom of the main cavity. A focusing lens group is fixed at the bottom of the focusing lens group mounting cavity; according to the two-stage variable-spot laser cutting head mechanism, light spot change is achieved mainly by rapidly changing the collimating lens sets, it needs to be ensured that at least one collimating lens set is coaxial with the focusing lens set during working, a laser beam needs to be coaxial with the focusing lens set, and the provided two-stage variable-spot laser cutting head mechanism can provide different adaptive light spots according to different thicknesses of machined plates, so that the machining efficiency is improved. Therefore, high-efficiency and high-quality processing is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting heads, in particular to a two-stage variable spot laser cutting head mechanism. Background Art

[0002] As the core component of laser cutting equipment, the laser cutting head mainly adjusts the optical path by adjusting the relative position relationship between the collimating lens group and the focusing lens group. During the cutting process, when cutting relatively thick workpieces, high-quality cutting requires that the focused light spot has a larger diameter and the focus position is adjusted to a specific position. However, when processing thin plate workpieces, it is necessary to reset the parameters focused on the workpiece to complete high-quality processing of the thin plate. The traditional laser cutting head mainly consists of a collimating lens group and a focusing lens group, which can only provide a single set of light spots and cannot guarantee the cutting quality of thick and thin plates at the same time. Utility Model Content

[0003] The utility model aims to provide a two-stage variable spot laser cutting head mechanism to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a two-stage variable spot laser cutting head mechanism, comprising a laser light source, a main cavity, a focusing lens group mounting cavity and a focusing lens group; a laser light source is mounted in the middle of the upper end of the main cavity, and a collimating lens mounting chamber is provided below the main cavity, a collimating lens group frame is placed inside the collimating lens mounting chamber, and a position shifting motor mounted on the front of the collimating lens mounting chamber drives the collimating lens group frame to rotate through a motor shaft, a focusing lens group mounting cavity is mounted at the bottom of the main cavity, and a focusing lens group is fixed at the bottom of the focusing lens group mounting cavity; the first collimating lens group and the second collimating lens group are fixed to the two sides of the collimating lens group frame by bolts.

[0005] Furthermore, the focusing lens group is located below the collimating lens group and is coaxial with the collimating lens group of the corresponding working condition.

[0006] Furthermore, the collimating lens assembly frame adopts a three-dimensional structure with three sides vertically connected to each other.

[0007] Furthermore, the two groups of collimating lens assemblies include a lens supporting tube installed on the collimating lens assembly frame, a lens installed inside the lens supporting tube, a sealing ring supported below the lens, and a pressing ring pressed above the lens.

[0008] Furthermore, an inwardly curved annular limiting ring is provided below the lens supporting tube, and a sealing ring is installed on the annular limiting ring, and the inner diameter of the sealing ring is smaller than the inner diameter of the annular limiting ring.

[0009] Furthermore, three groups of bolt holes are evenly opened on the side of the pressure ring, and the three groups of bolts pass through the lens support tube and are fixed on the collimating lens assembly frame.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The mechanism mainly realizes the change of light spot by quickly changing the collimating lens group. When working, it is necessary to ensure that at least one set of collimating lens groups is coaxial with the focusing lens group, and the laser beam must be coaxial with the set of lens groups. The two-stage variable light spot laser cutting head mechanism provided can provide different light spots according to the different thickness of the processed plate, thereby realizing efficient and high-quality processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the position and arrangement of the lens group of the utility model structure;

[0014] Figure 3 It is a cross-sectional schematic diagram of the lens installation of the utility model;

[0015] Figure 4 It is a schematic diagram of a light beam of the utility model;

[0016] Figure 5 It is a schematic diagram of the utility model under different working conditions.

[0017] In the figure: 1. Laser light source; 2. Main cavity; 3. Focusing lens group mounting cavity; 4. Collimating lens mounting compartment; 5. Focusing lens group; 6. Positioning motor; 7. First collimating lens group; 8. Collimating lens group frame; 9. Second collimating lens group; 10. Lens support tube; 11. Sealing ring; 12. Lens; 13. Pressure ring. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] See also Figure 1 —5, a two-stage variable spot laser cutting head mechanism, comprising a laser light source 1, a main cavity 2, a focusing lens group mounting cavity 3 and a focusing lens group 5; a laser light source 1 is mounted in the middle of the upper end of the main cavity 2, and a collimating lens mounting chamber 4 is provided below the main cavity 2, a collimating lens group frame 8 is placed inside the collimating lens mounting chamber 4, and a displacement motor 6 installed on the front of the collimating lens mounting chamber 4 drives the collimating lens group frame 8 to rotate through the motor shaft, a focusing lens group mounting cavity 3 is mounted at the bottom of the main cavity 2, and a focusing lens group 5 is fixed at the bottom of the focusing lens group mounting cavity 3; the first collimating lens group 7 and the second collimating lens group 9 are fixed to the two sides of the collimating lens group frame 8 by bolts; the focusing lens group 5 is located below the collimating lens group and is coaxial with the collimating lens group of the corresponding working condition.

[0020] The position-shifting motor 6 is installed on the cover door of the collimating lens installation chamber 4, and then the motor shaft of the position-shifting motor 6 is inserted into the hole of the collimating lens assembly frame 8, and the assembled collimating lens assembly frame 8 is installed inside the collimating lens installation chamber 4 to complete the assembly; the laser light source 1 emits light that passes through one of the collimating lens groups of the first collimating lens group 7 and the second collimating lens group 9 to form parallel light, and then irradiates the focusing lens group 5 through the internal space of the focusing lens group installation cavity 3 to form a focusing effect. The position-shifting motor 6 is fixed and drives the collimating lens assembly frame 8 to rotate. When the first collimating lens 7 is coaxial with the focusing lens group 5, it is in working condition 1. The position-shifting motor 6 drives the collimating lens assembly frame 8 to rotate, and when the second collimating lens group 9 is coaxial with the focusing lens group 5, it is in working condition 2.

[0021] The collimating lens assembly frame 8 adopts a three-dimensional structure with three sides connected perpendicularly to each other, so that the first collimating lens assembly 7 and the second collimating lens assembly 9 can be switched by driving the position shifting motor 6 .

[0022] The two collimating lens groups include a lens support tube 10 installed on the collimating lens group frame 8, a lens 12 installed inside the lens support tube 10, a sealing ring 11 supported below the lens 12, and a pressing ring 13 pressed above the lens 12, which can be effectively assembled to prevent the lens 12 from loosening.

[0023] An inwardly curved annular limit ring is arranged below the lens support tube 10, and a sealing ring 11 is installed on the annular limit ring, and the inner diameter of the sealing ring 11 is smaller than the inner diameter of the annular limit ring. Three groups of bolt holes are evenly arranged on the side of the pressure ring 13, and the three groups of bolts pass through the lens support tube 10 and are fixed on the collimating lens assembly frame 8.

[0024] It should be emphasized that the above description is only an embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present utility model, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present utility model.

Claims

1. A two-stage variable spot laser cutting head mechanism, characterized in that: The invention comprises a laser light source (1), a main cavity (2), a focusing lens assembly installation cavity (3), and a focusing lens assembly (5); the laser light source (1) is installed in the middle of the upper end of the main cavity (2), and a collimating lens installation chamber (4) is provided below the main cavity (2); a collimating lens assembly frame (8) is placed inside the collimating lens installation chamber (4), and a displacement motor (6) installed on the front of the collimating lens installation chamber (4) drives the collimating lens assembly frame (8) to rotate via a motor shaft; a focusing lens assembly installation cavity (3) is installed at the bottom of the main cavity (2), and a focusing lens assembly (5) is fixed at the bottom of the focusing lens assembly installation cavity (3); a first collimating lens assembly (7) and a second collimating lens assembly (9) are fixed to two side surfaces of the collimating lens assembly frame (8) by bolts.

2. The two-stage variable spot laser cutting head mechanism according to claim 1, characterized in that: The focusing lens group (5) is located below the collimating lens group and is coaxial with the collimating lens group of the corresponding working condition.

3. The two-stage variable spot laser cutting head mechanism according to claim 1, characterized in that: The collimating lens assembly frame (8) adopts a three-dimensional structure in which three surfaces are vertically connected to each other.

4. The two-stage variable spot laser cutting head mechanism according to claim 1, characterized in that: The two groups of collimating lens assemblies comprise a lens support tube (10) mounted on a collimating lens assembly frame (8), a lens (12) mounted inside the lens support tube (10), a sealing ring (11) supported below the lens (12), and a pressing ring (13) pressed above the lens (12).

5. The two-stage variable spot laser cutting head mechanism according to claim 4, characterized in that: An inwardly curved annular limiting ring is arranged below the lens support tube (10), and a sealing ring (11) is installed on the annular limiting ring, wherein the inner diameter of the sealing ring (11) is smaller than the inner diameter of the annular limiting ring.

6. The two-stage variable spot laser cutting head mechanism according to claim 5, characterized in that: The side of the pressure ring (13) is evenly provided with three groups of bolt holes, and the three groups of bolts pass through the lens support tube (10) and are fixed on the collimating lens assembly frame (8).

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