A laser texturing device for roller parts

Abstract

The present invention provides a laser texturing device for roller parts, which includes a working platform, a machine tool arranged on one side of the working platform, a fixing plate arranged on the other side of the machine tool, and a laser device arranged on the machine tool. A roller rotating shaft is provided on the machine tool, and a center point is provided on the fixing plate. A roller part to be processed is placed between the roller rotating shaft and the center point. A translation guide rail is arranged between the machine tool and the fixing plate, and a laser texturing head is arranged on the translation guide rail. The laser texturing device for roller parts provided by the present invention uses a continuous high-power laser device as the processing light source, and the number of processing heads is multiple, realizing multi-head processing, making full use of the laser power, and having a very fast processing speed. A multi-prism and a light splitting mechanism are used for light splitting to divide the continuous high-power laser beam into multiple paths of pulsed laser output. The laser energy utilization efficiency is high, the cost is low, and the service life is long.

Description

Technical Field

[0001] The present invention relates to the field of machine tool processing, and particularly to a laser texturing device for roller parts. Background Art

[0002] Textured cold-rolled thin steel sheets with special surface topographies have a wide range of applications in the manufacturing industry, especially in the automotive and home appliance industries. Textured cold-rolled thin steel sheets are rolled by rolls with textured surfaces. The steel sheets rolled by the textured rolls have greatly improved deep drawing performance and surface coating performance. As a texturing technology emerging in the past two decades, compared with traditional shot peening texturing and electro-discharge texturing technologies, laser texturing technology can obtain the best texturing effect and improve the roll life. However, the two main current laser texturing technologies: YAG solid laser texturing and CO2 gas laser texturing, both have the problem of low processing efficiency, which limits the application of laser texturing technology in the mainstream metallurgical industry.

[0003] In response to the problem of low processing efficiency, some current researchers have proposed various solutions to improve work efficiency. Nippon Steel Corporation in Japan has also tried to use multiple sets of lasers to texture the roll surface simultaneously. However, due to the differences in the output beam quality and polarization state of different lasers, the processing effects at different positions are inconsistent, affecting the uniformity of surface roughness and the macroscopic appearance effect. At the same time, the investment in multiple lasers has greatly increased the equipment cost and maintenance cost. There are also some laser texturing devices with multiple heads. For example, the patent with the publication number CN2882895 and the name of high-power laser roller surface multi-head texturing processing device. The main principle is that a rotating multi-prism reflects the laser, enabling the laser to scan within a certain range. By placing multiple focusing mirrors within this scanning range, the laser is focused to achieve multi-head texturing. However, in this process, due to the fact that the focusing mirrors cannot be closely arranged and the focusing mirrors need to be fixed, there will always be laser irradiating outside the focusing mirrors, resulting in relatively low energy utilization. Moreover, since the scanning range is related to the angle corresponding to the surface of the multi-prism, the larger the angle, the larger the scanning range, and the more focusing mirrors are placed, the higher the processing efficiency. However, the larger the angle, the lower the number of edges of the multi-prism. When the multi-prism rotates one week, the number of scanning times decreases, resulting in a decrease in efficiency. Therefore, the processing efficiency cannot be greatly improved. Moreover, during the processing, one focusing mirror forms one focal point. To form more focal points, more focusing mirrors need to be added, increasing the complexity of the system. Summary of the Invention

[0004] The purpose of the present invention is to provide a laser texturing device for roller parts to solve the problem of low processing efficiency in the existing laser texturing technology.

[0005] To achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0006] According to the first aspect of the embodiments of the present invention, a laser texturing device for roll parts is provided, which includes a working platform, a machine tool arranged on one side of the working platform, a fixing plate arranged on the other side of the machine tool, and a laser arranged on the machine tool. A roll shaft is arranged on the machine tool, and a center point is arranged on the fixing plate. A roll part to be processed is placed between the roll shaft and the center point. A translation guide rail is arranged between the machine tool and the fixing plate, and a laser texturing head is arranged on the translation guide rail.

[0007] Further, the laser texturing head includes a multi-prism structure, a front beam splitter arranged on the right side of the multi-prism structure, two rear beam splitters symmetrically arranged on both sides of the front beam splitter, and a collimator arranged between the multi-prism structure and the front beam splitter. Two focusing heads are also symmetrically arranged on the right side of the front beam splitter.

[0008] Further, the front beam splitter includes two symmetrically arranged mirrors. The front beam splitter evenly divides the light collimated by the collimator into two parts, and the split light passes through the rear beam splitters symmetrically arranged on both sides of the front beam splitter respectively.

[0009] Further, the multi-prism mechanism includes a multi-prism and a motor for driving the multi-prism to rotate. When the multi-prism rotates clockwise, the reflected light is scanned from top to bottom in sequence at the collimator, and the collimator collimates the light reflected by the multi-prism.

[0010] Further, the rear beam splitter includes two identical mirrors. By adjusting the included angle between the two mirrors, the laser forms two non-parallel laser beams with a certain angle after passing through the rear beam splitter, realizing re-beam splitting. The re-beam split light beams form two focal points through the focusing lens.

[0011] Further, the mirrors of the rear beam splitter are placed on an angular displacement device, and by adjusting the tilt angle of the mirrors, the output of different focal point arrays is realized.

[0012] Further, when the angle of the mirror is 0, the focal points are arranged in a line.

[0013] Further, the focusing head includes a focusing lens and a wedge prism arranged in front of the focusing lens. Parallel light passes through the wedge prism and then forms two focal points through the focusing lens, realizing re-beam splitting.

[0014] Further, the two focusing heads are symmetrically arranged relative to the roll axis.

[0015] Further, the laser includes a CO2 laser, a YAG laser or a fiber laser.

[0016] The embodiments of the present invention have the following advantages:

[0017] 1. The embodiment of the present invention provides a laser texturing device for roller parts, which uses a continuous high-power laser as the processing light source. The number of processing heads is multiple, enabling multi-head processing, fully utilizing the laser power, and having a very fast processing speed.

[0018] 2. A multi-prism and a beam splitting mechanism are used for beam splitting to divide the continuous high-power laser beam into multiple pulsed laser outputs. The laser energy utilization efficiency is high, the cost is low, and the service life is long.

[0019] 3. A continuous high-power laser (CO2 laser, YAG laser, fiber laser) is adopted. The technology is mature.

[0020] 4. Double-head focusing. The two heads are symmetrically placed relative to the axis of the rolling mill, and the focal lengths are adjusted synchronously, which can make the performance of the light output by each focusing head almost the same, and the processing effects are consistent.

[0021] 5. The number of output beams in each focusing head is more than 1, and the number of focal points formed by focusing is more than 1. Compared with the prior art where one focusing head focuses on one beam, the utilization rate of the focusing head is improved, the number of focusing heads is reduced, the cost is reduced, and the structure is simplified.

[0022] 6. A precise adjustment method for the lateral spacing between the focal points in the same focusing head. By controlling the angle between the rear reflectors in the beam splitting mechanism or adding a wedge lens with a specific angle in the focusing head, the lateral spacing of the focal points is precisely controlled to improve the processing efficiency.

[0023] 7. Precise adjustment of the lateral spacing between the focal points of the two focusing heads. Adjusting the distance between the focal points of the two focusing heads can meet the requirements of different processing precisions and expand the application scenarios of the equipment.

[0024] 8. Control matching between the rotation speed of the multi-prism and the rotation speed of the rolling mill. The faster the rotation speed of the multi-prism, the faster the rotation speed of the rolling mill, and the faster the processing speed, greatly improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of the laser texturing machine tool provided in Embodiment 1 of the present invention;

[0027] Figure 2 Schematic diagram of the laser texturing head structure;

[0028] Figure 3 Schematic diagram of the front beam splitter;

[0029] Figure 4 One of the schematic diagrams for adjusting the rear beam splitter;

[0030] Figure 5 Another schematic diagram for adjusting the rear beam splitter;

[0031] Figure 6 Schematic diagram of the focusing head with a wedge lens;

[0032] Figure 7 Schematic diagram of the focusing head without a wedge lens;

[0033] Explanation of reference numerals in the drawings: 1 - laser, 2 - machine tool, 201 - roll rotating shaft, 202 - center, 203 - translation guide rail, 3 - roll parts to be processed, 4 - working platform, 5 - laser texturing head, 501 - multi - prism structure, 502 - collimating mirror, 503 - front beam splitter, 5031 - reflecting mirror, 504 - rear beam splitter, 5041 - reflecting mirror, 5042 - angular displacement device, 505 - focusing head, 5061 - wedge prism, 5062 - focusing lens. Detailed implementation manners

[0034] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is 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 thus should not be construed as a limitation to the present invention.

[0036] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Embodiment 1

[0038] The present invention is a laser texturing device for roller parts, and its structure is as Figure 1 shown. It is provided with a laser 1 and a machine tool 2. The laser 1 is mounted on the body of the machine tool. There are a roller shaft 201, a center 202, and a translation guide rail 203. The roller part 3 is fixed between the shaft and the center and is parallel to the translation guide rail. A workbench 4 is mounted on the translation guide rail, and the workbench can slide along the translation guide rail. A laser texturing head 5 is mounted on the work platform 4. The laser 1 is a high-power laser, including but not limited to CO2 lasers, YAG lasers, and fiber lasers. The laser texturing head 5 is as Figure 2 shown. A multi-prism mechanism 501 includes a multi-prism and a high-speed motor that drives the multi-prism to rotate. When the multi-prism rotates clockwise, the reflected light is scanned from top to bottom in the collimator 502. The collimator 502 collimates the light reflected by the multi-prism. The size needs to ensure that during the rotation of the multi-prism, the scanned reflected light all passes through the collimator 502. The front beam splitter 503 consists of two reflectors 5031 as Figure 3 shown. The included angle between the two reflectors 5031 is β. Its function is to evenly divide the light collimated by the collimator 502 into two parts to achieve the first beam splitting. The light after beam splitting respectively passes through the rear beam splitter 504 and the focusing head 505 in sequence. Each rear beam splitter 504 consists of two identical reflectors 5041, as Figure 5 shown. The included angle between the two reflectors 5041 is a certain angle θ, and this angle can be controlled and changed to ensure that after the laser passes through the rear beam splitter 504, two non-parallel laser beams with a certain angle are formed to achieve the second beam splitting. The laser beams after beam splitting, after passing through the focusing lens 5062, form two focal points, and the distance between the focal points is fθ, where f is the focal length of the focusing lens. At the same time, as Figure 4, the mirror 5041 of the rear beam splitter 504 is also placed on the angular displacer 5042. By adjusting the tilt angle of the mirror 5041, the output of different focal point arrays can be achieved. When the tilt angle of the mirror 5041 is 0, the focal points are arranged in a line. When the tilt angle of the mirror 5041 is not 0, the focal points are arranged in a zigzag pattern as Figure 2 . Such as Figure 6 shown, a wedge prism 5061 is installed in front of the focusing mirror 5062. A parallel beam of light, after passing through the wedge prism 5061 and then through the focusing mirror 5062, can form two focal points, achieving secondary beam splitting. It can be foreseen that since two non-parallel beams of light are formed by the rear beam splitter 504, after passing through the focusing head 505 with the wedge prism 5061, four focal points will be formed. When the edge of the wedge prism 5061 is parallel to the direction of laser scanning, four side-by-side points will be formed, arranged in a 2*2 distribution. When the edge of the wedge prism 5061 is perpendicular to the direction of laser scanning, four linear points will be formed, arranged in a 1*4 distribution. When the edge of the wedge prism 5061 is neither perpendicular nor parallel to the direction of laser scanning, a zigzag distribution will be formed.

[0039] During the processing of roller-like parts, two focusing heads 505 are symmetrically placed relative to the axis of the rolling mill, and the focal lengths can be adjusted synchronously to achieve the same processing effect. Moreover, by adjusting the angles of the two mirrors 5041 of the rear beam splitter 504 and the angle of the wedge prism 5061, the output of one focusing head 505 with multiple focal points and different arrays can be achieved. And the distance between the focal points of the same focusing head 505 can be precisely controlled by controlling the angles of the rear beam splitter 5004 and the wedge prism 5061.

[0040] The roller-like parts to be processed are clamped by the rotating shaft 201 and the center point 202 on the numerical control machine tool 2. The roller-like parts are rotated by the rotation of the rotating shaft 201. The working platform on the numerical control machine tool 2 can perform three-dimensional movements, and its movements are controlled by the numerical control machine tool 2. The rotational speed control of the rotating shaft 201 needs to be matched with the rotational speed of the polygon mirror to achieve the optimal processing effect.

[0041] Such as Figure 2 shown, in the example, two focusing heads 505 are used. By changing the distance between the two rear beam splitters 504 and the distance between the focusing heads 505, the adjustment of the spacing between the focal points of the two focusing heads 505 can be achieved.

[0042] Preferably, the laser 1 includes but is not limited to CO2 lasers, YAG lasers, and fiber lasers.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser texturing device for roller parts, characterized in that: It includes a working platform, a machine tool arranged on one side of the working platform, a fixing plate arranged on the other side of the machine tool, and a laser arranged on the machine tool. A roll rotating shaft is provided on the machine tool, and a center point is provided on the fixing plate. A roll-like part to be processed is placed between the roll rotating shaft and the center point. A translation guide rail is provided between the machine tool and the fixing plate, and a laser texturing head is arranged on the translation guide rail; The laser texturing head includes a multi-prism structure, a front beam splitter arranged on the right side of the multi-prism structure, two rear beam splitters symmetrically arranged on both sides of the front beam splitter, and a collimator arranged between the multi-prism structure and the front beam splitter. Two focusing heads are also symmetrically arranged on the right side of the front beam splitter; The focusing head includes a focusing lens and a wedge prism arranged in front of the focusing lens. Parallel light passes through the wedge prism and then through the focusing lens to form two focusing points, realizing secondary beam splitting. Since two non-parallel beams of light are formed by the rear beam splitter, after passing through the focusing head with a wedge prism, 4 focusing points will be formed. When the edge of the wedge prism is parallel to the laser scanning direction, 4 points will be formed side by side. When the edge of the wedge prism is perpendicular to the laser scanning direction, 4 linear points will be formed. When the edge of the wedge prism is neither perpendicular nor parallel to the laser scanning direction, 4 points will be formed in a zigzag distribution; The rear beam splitter includes two identical reflectors. By adjusting the included angle between the two reflectors, the laser forms two non-parallel laser beams with a certain angle after passing through the rear beam splitter, realizing secondary beam splitting. The beams of light after secondary beam splitting form two focusing points through the focusing lens.

2. The laser texturing device for roller parts according to claim 1, wherein: The front beam splitter includes two symmetrically arranged reflectors. The front beam splitter evenly divides the light collimated by the collimator into two parts, and the split light passes through the rear beam splitters symmetrically arranged on both sides of the front beam splitter respectively.

3. The laser texturing device for roller parts according to claim 1, characterized in that: The multi-prism structure includes a multi-prism and a motor for driving the multi-prism to rotate. When the multi-prism rotates clockwise, the reflected light is sequentially scanned from top to bottom at the collimator, and the collimator collimates the light reflected by the multi-prism.

4. The laser texturing device for roller parts according to claim 1, characterized in that: The reflectors of the rear beam splitter are placed on an angular displacement device, and different arrays of focusing points are output by adjusting the tilt angle of the reflectors.

5. The laser texturing device for roller parts according to claim 4, wherein: When the angle of the reflector is 0, the focusing points are arranged in a line.

6. The laser texturing device for roller parts according to claim 1, characterized in that: The two focusing heads are symmetrically arranged relative to the roll axis.

7. The laser texturing device for roller parts according to claim 1, characterized in that: The laser includes a CO2 laser, a YAG laser or a fiber laser.

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