Laser scanning system

Abstract

The utility model discloses a laser scanning system, and the system comprises a transmission device which is used for transmitting a material belt; the laser device comprises a laser source, a beam splitter and a galvanometer, the laser source is used for generating a single laser beam, the beam splitter and the galvanometer are sequentially arranged in the output direction of the laser beam, and the beam splitter is used for splitting the single laser beam into at least two laser beams; the controller is connected with the conveying device and the laser device and used for controlling the galvanometer to move so that the at least two laser beams can conduct laser scanning on the material belt. By the adoption of the laser scanning system, the scanning efficiency of the laser device can be improved, and therefore the machining efficiency of the material belt can be improved.

Description

Technical Field

[0001] This application relates to the field of laser processing technology, and particularly to a laser scanning system. Background Art

[0002] During the processing of a strip, a laser device needs to process the strip in a moving state. Existing laser processing methods all use a laser device that generates a single laser beam for processing. For example, during the etching of a pole piece, the laser device uses a single laser beam to etch the strip in a moving state. However, due to the too low scanning efficiency of the single laser beam, the transmission speed of the pole piece cannot be too fast, thus limiting the processing efficiency of the strip. Utility Model Content

[0003] An embodiment of this application discloses a laser scanning system, which can improve the scanning efficiency of the laser device, thereby facilitating the improvement of the processing efficiency of the strip.

[0004] An embodiment of this application discloses a laser scanning system, including:

[0005] A transmission device for transmitting the strip;

[0006] A laser device, including a laser source, a beam splitter, and a galvanometer. The laser source is used to generate a single laser beam. The beam splitter and the galvanometer are sequentially arranged along the output direction of the laser beam. The beam splitter is used to split the single laser beam into at least two laser beams;

[0007] A controller, connected to the transmission device and the laser device, for controlling the movement of the galvanometer so that at least two laser beams perform laser scanning on the strip.

[0008] In one embodiment, the laser device further includes a field lens, and the field lens is arranged behind the galvanometer along the output direction of the laser beam.

[0009] In one embodiment, the laser device further includes a collimating lens, and the collimating lens is arranged in front of the beam splitter along the output direction of the laser beam.

[0010] In one embodiment, at least two laser beams are reflected by the galvanometer and transmitted to the field lens.

[0011] In one embodiment, the beam splitter includes a diffractive optical element DOE.

[0012] In one embodiment, the controller is further used to control the transmission device to transmit the strip when the laser source generates a single laser beam.

[0013] In one embodiment, the controller is further configured to control the galvanometer mirror to move according to a preset scanning pattern, so that at least two laser beams perform laser scanning on the strip.

[0014] In one embodiment, the transmission device includes an unwinding mechanism, a first roller, and a driving mechanism;

[0015] The unwinding mechanism is configured to unwind the strip;

[0016] The first roller is disposed downstream of the unwinding mechanism;

[0017] The driving mechanism is connected to the first roller to drive the first roller to rotate, so as to transmit the strip.

[0018] In one embodiment, the first roller is located downstream of the laser device along the transmission direction of the strip.

[0019] In one embodiment, the transmission device further includes a plurality of second rollers, and the plurality of second rollers are spaced apart along the transmission direction of the strip, and the plurality of second rollers are located downstream of the unwinding mechanism along the transmission direction of the strip.

[0020] The laser scanning system disclosed in the present application includes a transmission device, a laser device, and a controller. The transmission device is configured to transmit a strip. The laser device may include a laser source, a beam splitter, and a galvanometer mirror. The laser source may be configured to generate a single laser beam. The beam splitter and the galvanometer mirror are sequentially arranged along the output direction of the laser beam. The beam splitter may be configured to split the single laser beam into at least two laser beams. The controller may be connected to the transmission device and the laser device, and control the movement of the galvanometer mirror, so that at least two laser beams perform laser scanning on the strip. It can be seen that by using the laser scanning system of the present application, multi-beam laser beams can be used to perform laser scanning on the strip, replacing the method of using a single laser beam to perform laser scanning on the strip in a moving state in the related art, effectively improving the scanning efficiency of the laser scanning system, and at the same time being beneficial to improving the processing efficiency of the strip. In addition, the present application increases the number of laser beams by means of laser beam splitting, and there is no need to set multiple laser devices, which not only simplifies the structural design of the laser scanning system, reduces the assembly between components, but also is beneficial to reducing the cost of laser scanning. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a laser scanning system disclosed in an embodiment of the present application;

[0023] Figure 2 It is a schematic structural diagram of a laser device disclosed in an embodiment of the present application;

[0024] Figure 3 It is a schematic structural diagram of a transmission device disclosed in an embodiment of the present application. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] It should be noted that the terms "including" and "having" in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0027] It can be understood that the terms "first", "second", etc. used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of the present application, the first roller can be called the second roller, and similarly, the second roller can be called the first roller. Both the first roller and the second roller are rollers, but they are not the same roller.

[0028] During the etching process of the pole piece, it is usually necessary to use a laser device to process the moving strip. Existing laser processing methods are all processed by a laser device that generates a single laser beam. For example, during the etching process of the pole piece, usually one laser device is used to generate a laser beam, and after passing through optical components, a focus is generated, and then the laser focus moves linearly on the surface of the pole piece to etch out the wire grooves.

[0029] However, adopting this method, the scanning efficiency of the single laser beam is too low, which easily leads to the transmission speed of the pole piece not being able to be too fast, greatly limiting the processing efficiency of the strip.

[0030] Based on this, the present application discloses a laser scanning system. By setting a beam splitter, the beam splitter can split a single laser beam into at least two laser beams. At the same time, a control device is also used to control the galvanometer to scan the moving tape with two laser beams simultaneously, thereby improving the scanning efficiency of the laser device and the processing efficiency of the tape. On the other hand, the present application increases the number of laser beams by means of laser beam splitting, without the need to set multiple laser devices, which not only simplifies the structural design of the laser scanning system, reduces the assembly between components, but also helps to reduce the cost of laser scanning.

[0031] The following will be described in detail with reference to the accompanying drawings.

[0032] As Figure 1 shown, Figure 1 FIG. 10 is a schematic structural diagram of a laser scanning system disclosed in an embodiment of the present application. The laser scanning system may include a transmission device 110, a laser device 120, a tape 130, and a controller. Among them, the controller is not shown in Figure 1 FIG.

[0033] Specifically, the transmission device 110 is used to transmit the tape 130. It can be understood that the tape 130 may include, but is not limited to, pole pieces, diaphragms, etc. The laser device 120 includes a laser source 121, a beam splitter 122, and a galvanometer 123. The laser source 121 is used to generate a single laser beam. The beam splitter 122 and the galvanometer 123 are arranged in sequence along the output direction of the laser beam. The beam splitter 122 is used to split the single laser beam into at least two laser beams. That is, along the output direction of the laser beam of the laser source, the laser source, the beam splitter, and the galvanometer are arranged in sequence, so that the single laser beam emitted by the laser source can first pass through the beam splitter, and the beam splitter splits the single laser beam into at least two laser beams. The split laser beams then pass through the galvanometer 123 and are output to the tape.

[0034] It can be understood that the above-mentioned laser source can stably emit a single laser beam, thereby reducing the fluctuation of laser energy and making the laser scanning on the tape more uniform.

[0035] The controller is connected to both the transmission device 110 and the laser device 120. Thus, the controller can be used to control the movement of the galvanometer 123 so that at least two laser beams perform laser scanning on the tape 130, thereby completing laser processing tasks such as laser etching and laser cutting.

[0036] The controller, the transmission device 110, and the laser device 120 can all be connected by wire or wirelessly. For example, the controller can be communicatively connected to the transmission device 110 and the laser device 120. The connection between the controller and the transmission device 110 indicates that the controller can control the operation of each mechanism in the transmission device 110. The connection between the controller and the laser device 120 can refer to the connection with the control mechanism of the laser device 120. The control mechanism of the laser device 120 can include a board, a chip, etc. The controller can send instructions for controlling each mechanism in the laser device 120 to the control mechanism of the laser device 120, so that the control mechanism of the laser device 120 controls the operation of each mechanism in the laser device 120.

[0037] It can be understood that since the tape 130 is always in the transmission process, that is, the tape 130 is in a dynamic transmission process, the actual trajectory generated by the laser on the tape 130 is not necessarily the same as the scanning trajectory of the laser. Based on this, the transmission device 110 can transmit the tape 130 at a preset speed and send the preset speed to the controller, so that the controller can control the movement of the galvanometer 123 according to the preset speed (for example, control the galvanometer 123 to swing or rotate a certain angle), so that the scanning trajectories of at least two laser beams for laser scanning of the tape 130 can compensate for the trajectory offset caused by the preset speed.

[0038] Optionally, the controller is further configured to control the movement of the galvanometer 123 according to a preset scanning pattern, so that at least two laser beams perform laser scanning on the tape. Specifically, the controller can perform trajectory fitting on the scanning pattern of the tape 130 according to the preset speed to obtain a scanning trajectory, and then the controller controls the laser device 120 to perform laser scanning on the tape 130 according to the scanning trajectory, so that the actual trajectory generated by the tape 130 can match the scanning pattern, thereby improving the accuracy of laser scanning.

[0039] It should be understood that the controller can calibrate the galvanometer amplitude before performing laser scanning to obtain the fitting parameters for trajectory fitting. Thus, the controller can perform trajectory fitting on the scanning pattern of the tape 130 according to the preset speed and the fitting parameters to obtain a scanning trajectory. For example, when the scanning pattern is a straight line perpendicular to the transmission direction of the tape 130, the controller performs trajectory fitting on the scanning pattern of the tape 130, and the obtained scanning trajectory is a straight line that is not perpendicular to the transmission direction of the tape 130, and the inclination angle can be determined by the preset speed.

[0040] Optionally, since the startup of the transmission device 110 consumes more energy than the startup of the laser source 121, based on this, the controller can first control the laser source 121 to generate a single laser beam, and when the laser source generates a single laser beam, then control the transmission device 110 to start transmitting the material tape 130, avoiding the situation that when the transmission device 110 starts to transmit the material tape 130, the laser source 121 cannot generate a laser beam and etching cannot be performed. While avoiding waste of materials, it also reduces the cost of laser scanning.

[0041] To describe the structure of the laser device in more detail, the following will be described with reference to specific diagrams. As Figure 2 shown, Figure 2 is a schematic structural diagram of a laser device disclosed in an embodiment of the present application. Generally speaking, the laser device 120 can be arranged on one side of the transmission device 110, and the laser device 120 can be arranged facing the transmission device 110, so that the laser device 120 can face the material tape 130 on the transmission device 110.

[0042] In some embodiments, the laser device 120 further includes a collimating mirror 124 and a field lens 125. Among them, the collimating mirror 124 is arranged in front of the beam splitter 122 along the output direction of the laser beam, and the field lens 125 is arranged behind the galvanometer 123 along the output direction of the laser beam. That is, along the output direction of the laser beam, the laser source, the collimating mirror, the beam splitter, the galvanometer, and the field lens are arranged in sequence. Thus, the laser source generates a single laser beam, and the single laser beam is collimated by the collimating mirror 124. The collimated single laser beam reaches the beam splitter 122, and is split into at least two laser beams. The at least two laser beams then reach the galvanometer 123, and are reflected and transmitted by the galvanometer 123 to the field lens, so that the focal points corresponding to the two laser beams are on the same plane, and this plane can be the plane where the material tape is located.

[0043] It can be understood that the focusing directions of the at least two laser beams after beam splitting can be perpendicular to the moving direction of the material tape, and the quality of the at least two laser beams after beam splitting does not change, and the size of the laser focus does not change.

[0044] Optionally, the focal points corresponding to the two laser beams can be located at different positions, so that the two laser beams can start scanning separately, which is beneficial to accelerating the speed of laser scanning. Or, the focal points corresponding to the two laser beams can also be located at the same position, so that the two laser beams can start scanning together, which is beneficial to increasing the energy of laser scanning, thereby improving the efficiency of laser scanning.

[0045] Optionally, the beam splitter can be a DOE (Diffractive Optical Element). The design schemes of the DOE include a periodic phase design scheme based on pixel points and a grating cascade scheme. The two schemes can be used independently or in combination to achieve the beam splitting effect. Since the DOE can be designed to achieve various complex beam splitting functions, a single laser beam can be split into laser beams with any number and angles, which is beneficial to improving the flexibility of laser beam splitting.

[0046] To illustrate the structure of the transmission device in more detail, as Figure 3 shown, Figure 3 is a schematic structural diagram of a transmission device disclosed in an embodiment of the present application. In some embodiments, the transmission device 110 may include an unwinding mechanism 111, a first roller 112, a driving mechanism 113, and a plurality of second rollers 114. Among them, the unwinding mechanism 111 can be used to unwind the tape 130. The first roller 112 can be disposed downstream of the unwinding mechanism 111. The plurality of second rollers 114 can also be disposed downstream of the unwinding mechanism 111. The plurality of second rollers 114 are spaced apart along the transmission direction of the tape 130. That is, after the tape 130 is unwound by the unwinding mechanism 111, it reaches each of the second rollers 114 and the first roller 112. The laser device 120 can perform laser scanning on the tape 130 between one of the second rollers and the first roller 112.

[0047] Optionally, in the transmission direction of the tape, the plurality of second rollers can be located upstream of the first roller, or the second rollers can also be located downstream of the first roller. Or, some of the second rollers can be located upstream of the first roller, and some of the second rollers can be located downstream of the first roller. As long as it can be realized that both the first roller and the second roller are located downstream of the unwinding mechanism, the present embodiment does not specifically limit the relative positions of the first roller and the second roller.

[0048] Optionally, the driving mechanism 113 can be connected to the first roller 112 to drive the first roller 112 to rotate to transmit the tape 130. That is, in fact, the first roller 112 is a driving roller, which can actively rotate under the driving action of the driving mechanism to transmit the tape. The plurality of second rollers 114 are follower rollers. The frictional force generated by the rotation of the first roller 112 drives the second rollers 114 to rotate, so that the tape 130 is transmitted. By using the first roller 112 as the driving roller and the second rollers 114 as the follower rollers, the number of driving mechanisms 113 can be reduced, the structural design of the laser scanning system can be simplified, and the assembly between components can be reduced.

[0049] It can be understood that the speed at which the driving mechanism 113 drives the first roller 112 to rotate is matched with the unwinding speed of the unwinding mechanism 111. The unwinding mechanism 111 and the driving mechanism 113 together enable the material tape 130 to be transported at a preset speed, thereby improving the stability of the transport speed of the material tape 130.

[0050] Optionally, the driving mechanism 113 can be, for example, a linear motor, a servo motor, etc.

[0051] Optionally, the first roller 112 is located downstream of the laser device 120 in the transport direction of the material tape 130. In this way, since the laser scanning area of the laser device 120 is between the unwinding mechanism 111 and the first roller 112, when the distance between the unwinding mechanism 111 and the laser scanning area also exceeds the threshold, the unwinding mechanism 111 and the first roller 112 can together make the speed and tension of the material tape 130 at the laser scanning area stable, etc., thereby making the laser scanning more stable and improving the accuracy of the laser scanning.

[0052] Exemplarily, the first roller 112 can be arranged close to the laser device 120 in the transport direction of the material tape 130, and the first roller 112 is an adjacent roller to the laser device 120. That is, the roller closest to the laser scanning area of the laser device 120 is the first roller 112. Thus, when the driving mechanism 113 drives the first roller 112 to rotate, because the first roller 112 is relatively close to the laser device 120, the speed, tension, etc. of the material tape 130 transported to the laser scanning area can be made relatively stable, so that the scanning trajectory of the laser device on the material tape can be more controllable.

[0053] Optionally, an encoder can be correspondingly arranged on the first roller 112. When the driving mechanism 113 drives the first roller 112 to rotate, the encoder can detect the speed signal of the material tape 130 and send the speed signal to the controller. Thus, the controller can determine the preset speed corresponding to the material tape 130 according to the speed signal. It can be understood that the communication between the controller and the encoder, the transmission device 110, and the laser device 120 can be at the microsecond level, ensuring the timeliness of communication. Therefore, the time for the speed signal to reach the controller and the scanning trajectory to reach the laser device is relatively short, which is not only beneficial to improving the efficiency of laser scanning, but also enables the laser device to scan the material tape more evenly and stably.

[0054] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", "ideal embodiments", etc. mean that the specific features, structures, material tapes or features described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0055] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0056] The above-described embodiments only express several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A laser scanning system, characterized in that: include: A transmission device, used for transmitting the material belt; A laser device, comprising a laser source, a beam splitter, and a galvanometer, wherein the laser source is used to generate a single laser beam, the beam splitter and the galvanometer are sequentially arranged along an output direction of the laser beam, and the beam splitter is used to split the single laser beam into at least two laser beams; A controller is connected to the transmission device and the laser device, and is used to control the movement of the galvanometer so that at least two laser beams perform laser scanning on the material strip.

2. The laser scanning system according to claim 1, characterized in that: The laser device further comprises a field lens, which is arranged behind the galvanometer mirror along the output direction of the laser beam.

3. The laser scanning system according to claim 2, characterized in that: The laser device further comprises a collimator lens, which is arranged before the beam splitter along the output direction of the laser beam.

4. The laser scanning system according to claim 2, characterized in that: At least two laser beams are reflected by the galvanometer mirror and transmitted to the field mirror.

5. The laser scanning system according to claim 1, characterized in that: The beam splitter comprises a diffractive optical element DOE.

6. The laser scanning system according to claim 1, characterized in that: The controller is also used to control the transmission device to transmit the material tape when the laser source generates a single laser beam.

7. The laser scanning system according to claim 1, characterized in that: The controller is also used to control the movement of the galvanometer according to a preset scanning pattern, so that the at least two laser beams perform laser scanning on the material strip.

8. The laser scanning system according to claim 1, characterized in that: The transmission device comprises an unwinding mechanism, a first roller and a driving mechanism; The unwinding mechanism is used to unwind the material strip; The first roller is arranged downstream of the unwinding mechanism; The driving mechanism is connected to the first roller to drive the first roller to rotate so as to transmit the material belt.

9. The laser scanning system according to claim 8, characterized in that: The first roller is located downstream of the laser device along the transport direction of the material strip.

10. The laser scanning system according to claim 8, characterized in that: The transmission device also includes a plurality of second rollers, which are arranged at intervals along the transmission direction of the material belt, and are located downstream of the unwinding mechanism along the transmission direction of the material belt.

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