A shaping device for laser cladding light sources with multiple parallel beams

Abstract

The shaping device of multiple groups of parallel beam laser cladding light sources provided by the present invention adjusts the positions of the first concave-convex lens L2 and the second biconvex lens L3 of the second lens group, and adjusts the first concave-convex lens L2 and the second biconvex lens L3 as a whole, so as to realize the focusing function. The output light spot can be adjusted accordingly, which fully meets the requirements of the laser cladding products for the light spot and can obtain the light spot requirements of various energy distributions. It meets the needs of laser cladding products and is easy to operate.

Description

Technical Field

[0001] The invention relates to the field of semiconductor laser technology, and in particular to a shaping device for laser cladding light sources with multiple groups of parallel beams. Background Art

[0002] Laser cladding technology was first realized by Gnanamuthu in 1974. Since then, laser cladding technology has become a research focus and a hot spot in the development of laser surface modification technology. Laser cladding technology refers to placing the powder used for cladding on the surface of the clad substrate through various powder feeding methods such as internal or external powder feeding, and then irradiating the laser to melt the powder used for cladding and the clad substrate at the same time to form a molten pool, and then quickly cool it to form a surface modification layer. The surface modification layer is a good metallurgical combination of the clad substrate and the powder material, and has no cracks and pores, which can significantly improve the surface hardness, fatigue resistance, oxidation resistance, wear resistance and height performance of the substrate.

[0003] Compared with other surface modification technologies, laser cladding has excellent characteristics such as high energy density, fast heating speed, small workpiece deformation, firm bonding between substrate and cladding coating, and small coating structure. In addition, through the combination of optical path design and robots, all-round laser cladding without dead angles can basically be achieved in industry. However, due to the complex structure and strange shape of the processed parts, in some specific application scenarios, the traditional Gaussian circular spot can no longer meet the processing requirements. Therefore, beam shaping technology is a key research focus in laser cladding technology. Summary of the invention

[0004] In view of this, it is necessary to provide a shaping device for a laser cladding light source with multiple groups of parallel beams that meet the light beam requirements of laser cladding products.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] On the one hand, the present application provides a shaping device for a laser cladding light source with multiple groups of parallel beams, comprising an optical objective lens, and in sequence from the object surface end to the imaging surface along the optical axis direction of the lens of the optical objective lens further comprising: a first lens group with positive optical focal length, an aperture and a second lens group with positive optical focal length, wherein the first lens group comprises at least one plano-convex lens (L1), and the second lens group comprises in sequence along the optical axis direction a first concave-convex lens (L2) and a second biconvex lens (L3), and zooming is achieved by adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3).

[0007] In some of the embodiments, when the positions of the first meniscus lens (L2) and the second biconvex lens (L3) are adjusted, the relative distance between the first meniscus lens (L2) and the second biconvex lens (L3) remains unchanged.

[0008] In some embodiments, the lens is made of glass.

[0009] In some of the embodiments, the output spot size of the shaping device is between 8mm and 40mm, and in the process of adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3), the distortion of the spot is controlled to be less than 2.5% in the whole field of view, and the energy distribution of the spot presents a flat-top distribution.

[0010] On the other hand, the present application also provides a shaping device for a plurality of parallel beam laser cladding light sources, comprising an optical objective lens, and along the optical axis direction of the lens of the optical objective lens from the object surface end to the imaging surface, comprising: a second lens group with positive optical focal length, wherein the second lens group comprises a first concave-convex lens (L2) and a second biconvex lens (L3) in sequence along the optical axis direction, and zooming is achieved by adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3).

[0011] In some of the embodiments, when the positions of the first meniscus lens (L2) and the second biconvex lens (L3) are adjusted, the relative distance between the first meniscus lens (L2) and the second biconvex lens (L3) remains unchanged.

[0012] In some of the embodiments, during the process of adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3), the energy of the output light spot of the shaping device presents an M-shaped distribution.

[0013] In some embodiments, the lens is made of glass.

[0014] By adopting the above technical solution, the technical effects achieved by the present invention are as follows:

[0015] The shaping device of multiple groups of parallel beam laser cladding light sources provided by the present invention adjusts the positions of the first concave-convex lens L2 and the second biconvex lens L3 of the second lens group, and adjusts the first concave-convex lens L2 and the second biconvex lens L3 as a whole, so as to realize the focusing function. The output light spot can be adjusted accordingly, which fully meets the requirements of the laser cladding products for the light spot and can obtain the light spot requirements of various energy distributions. It meets the needs of laser cladding products and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of a shaping device for multiple sets of parallel beam laser cladding light sources provided in Example 1 of the present invention.

[0018] Figure 2 The shaping device of the laser cladding light source with multiple sets of parallel beams provided in Example 1 of the present invention is a distorted grid line diagram at Zoom1

[0019] Figure 3 The shaping device of the laser cladding light source with multiple sets of parallel beams provided in Example 1 of the present invention is in the Zoom2 distortion grid diagram

[0020] Figure 4 Energy distribution diagram of the illumination light source of the shaping device of the laser cladding light source with multiple sets of parallel beams provided in Example 1 of the present invention

[0021] Figure 5 The spot energy distribution diagram of the shaping device of the laser cladding light source with multiple sets of parallel beams provided in Example 1 of the present invention at Zoom 1

[0022] Figure 6 The light spot energy distribution diagram of the shaping device of multiple sets of parallel beam laser cladding light sources provided in Example 1 of the present invention at Zoom2. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Example 1

[0028] See also Figure 1 , which is a schematic structural diagram of a shaping device for a plurality of parallel beam laser cladding light sources provided in Example 1 of the present invention (including two ZOOM zoom positions), comprising: an optical objective lens, and along the optical axis direction of the lens of the optical objective lens from the object surface end to the imaging surface, it also includes: a first lens group 110 with positive focal power, an aperture (not shown) and a second lens group 130 with positive focal power, the first lens group includes at least one plano-convex lens (L1), and the second lens group includes a first concave-convex lens (L2) and a second biconvex lens (L3) in sequence along the optical axis direction, and zooming is achieved by adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3).

[0029] In some of the embodiments, when the positions of the first meniscus lens (L2) and the second biconvex lens (L3) are adjusted, the relative distance between the first meniscus lens (L2) and the second biconvex lens (L3) remains unchanged.

[0030] It can be understood that the above embodiment of the present application realizes the focusing function by adjusting the first concave-convex lens L2 and the second biconvex lens L3 as a whole, and the installation and adjustment are simple.

[0031] In some embodiments, the lens is made of glass.

[0032] It can be understood that the present embodiment uses a lens made of glass material and improves the numerical aperture through optical design. Therefore, the objective lens provided by the present invention allows a parallel light beam with a certain divergence angle, which meets the high power requirements, and the lens made of glass material can also avoid the defocusing phenomenon caused by high temperature to the material.

[0033] In some of the embodiments, the output spot size of the shaping device is between 8mm and 40mm, and in the process of adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3), the distortion of the spot is controlled to be less than 2.5% in the whole field of view, and the energy distribution of the spot presents a flat-top distribution.

[0034] like Figure 2 As shown in FIG. 1 , the distorted grid diagram of the shaping device of the laser cladding light source with multiple sets of parallel beams provided in Example 1 of the present invention at the first zoom is compared with the laser light source with a divergence angle as shown in FIG. Figure 4 The energy distribution diagram of the laser light source shown in the figure shows that the energy distribution of the output light spot presents a better flat-top distribution through the shaping device at the first zoom position, such as Figure 5 shown.

[0035] like Figure 3 The distortion grid diagram of the shaping device of the laser cladding light source of multiple sets of parallel beams provided in Example 1 of the present invention at the second zoom is shown in the following figure: Figure 6 shown.

[0036] The shaping device of multiple groups of parallel beam laser cladding light sources provided in the above-mentioned embodiment 1 of the present application adjusts the positions of the first concave-convex lens L2 and the second biconvex lens L3 of the second lens group, and adjusts the first concave-convex lens L2 and the second biconvex lens L3 as a whole, so as to realize the focusing function. The output light spot can be adjusted accordingly, which fully meets the requirements of the laser cladding products for the light spot and can obtain the light spot requirements of various energy distributions. It meets the needs of laser cladding products and is easy to operate.

[0037] Example 2

[0038] The present application also provides a shaping device for a laser cladding light source with multiple groups of parallel beams, comprising an optical objective lens, and along the optical axis direction of the lens of the optical objective lens from the object surface end to the imaging surface, comprising: a second lens group with positive optical focal length, wherein the second lens group comprises a first concave-convex lens (L2) and a second biconvex lens (L3) in sequence along the optical axis direction, and zooming is achieved by adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3).

[0039] In some of the embodiments, when the positions of the first meniscus lens (L2) and the second biconvex lens (L3) are adjusted, the relative distance between the first meniscus lens (L2) and the second biconvex lens (L3) remains unchanged.

[0040] It can be understood that the above embodiment of the present application realizes the focusing function by adjusting the first concave-convex lens L2 and the second biconvex lens L3 as a whole, and the installation and adjustment are simple.

[0041] In some of the embodiments, during the process of adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3), the energy of the output light spot of the shaping device presents an M-shaped distribution.

[0042] In some embodiments, the lens is made of glass.

[0043] It can be understood that the present embodiment uses a lens made of glass material and improves the numerical aperture through optical design. Therefore, the objective lens provided by the present invention allows a parallel light beam with a certain divergence angle, which meets the high power requirements, and the lens made of glass material can also avoid the defocusing phenomenon caused by high temperature to the material.

[0044] The shaping device of multiple groups of parallel beam laser cladding light sources provided in the above-mentioned embodiment 2 of the present application adjusts the positions of the first concave-convex lens L2 and the second biconvex lens L3 of the second lens group, and adjusts the first concave-convex lens L2 and the second biconvex lens L3 as a whole, so as to realize the focusing function. The output light spot can be adjusted accordingly, which fully meets the requirements of the laser cladding products for the light spot and can obtain the light spot requirements of various energy distributions. It meets the needs of laser cladding products and is easy to operate.

[0045] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A shaping device for laser cladding light sources with multiple sets of parallel beams, characterized in that: The optical objective lens comprises an optical objective lens, which comprises, in sequence from the object surface end to the imaging surface along the optical axis direction of the lens of the optical objective lens: a first lens group with positive focal power, an aperture and a second lens group with positive focal power, wherein the first lens group comprises at least one plano-convex lens (L1), and the second lens group comprises, in sequence along the optical axis direction, a first concave-convex lens (L2) and a second biconvex lens (L3), and zooming is achieved by adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3).

2. The shaping device of multiple sets of parallel beam laser cladding light sources according to claim 1, characterized in that: When the positions of the first meniscus lens (L2) and the second biconvex lens (L3) are adjusted, the relative distance between the first meniscus lens (L2) and the second biconvex lens (L3) remains unchanged.

3. The shaping device of multiple sets of parallel beam laser cladding light sources according to claim 1, characterized in that: The lens is made of glass.

4. The shaping device of multiple sets of parallel beam laser cladding light sources according to claim 1, characterized in that: The output light spot size of the shaping device is between 8mm and 40mm. In the process of adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3), the distortion of the light spot is controlled to be less than 2.5% in the whole field of view, and the energy distribution of the light spot presents a flat-top distribution.

5. A shaping device for multiple sets of parallel beam laser cladding light sources, characterized in that: The optical objective lens comprises an optical objective lens, and along the optical axis direction of the lens of the optical objective lens from the object surface end to the imaging surface, the second lens group has a positive optical focal length, and the second lens group comprises a first concave-convex lens (L2) and a second biconvex lens (L3) in sequence along the optical axis direction, and zooming is achieved by adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3), and when the positions of the first concave-convex lens (L2) and the second biconvex lens (L3) are adjusted, the relative distance between the first concave-convex lens (L2) and the second biconvex lens (L3) remains unchanged.

6. The shaping device of multiple sets of parallel beam laser cladding light sources according to claim 5, characterized in that: In the process of adjusting the positions of the first concave-convex lens (L2) and the second biconvex lens (L3), the energy of the output light spot of the shaping device is distributed in an M shape.

7. The shaping device of multiple sets of parallel beam laser cladding light sources according to claim 5, characterized in that: The lens is made of glass.

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