Automatic focusing laser processing device

Abstract

The utility model discloses an automatic focusing laser processing device. The automatic focusing laser processing device comprises a laser generator, a field lens, a first detector and a driving module, wherein the laser generator and the field lens are arranged at an interval, the field lens is installed on the driving module, the laser generator is used for emitting laser, and the field lens is used for focusing the laser on the surface of a workpiece; the first detector is electrically connected with the driving module, the first detector is used for detecting the distance between the field lens and the surface of the workpiece in real time, and the driving module drives the field lens to move along a laser path according to the distance, detected by the first detector, between the field lens and the surface of the workpiece. And the laser is focused on the surface of the workpiece in a self-adaptive manner. Through the arrangement, the problems that the focusing efficiency is low and dynamic focusing cannot be realized due to the fact that the laser focus is manually adjusted at present are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser processing, in particular to an automatic focusing laser processing device. Background Art

[0002] In the production process of lithium batteries, the positive and negative electrodes need to be processed by lasers such as striping, cutting, slicing, cleaning, scribing or punching. During the processing, since the electrode strip will shake during operation, the corresponding laser focus will also be defocused as the electrode strip moves. In order to ensure that the laser focus remains on the workpiece, the distance from the field lens to the workpiece needs to be adjusted before processing.

[0003] The current focusing method mainly relies on manual operation, that is, the laser is aimed at the surface of the workpiece to emit light, and the distance from the field lens to the workpiece is manually adjusted according to the effect. The operation is repeated until the laser focus coincides with the surface of the workpiece, and the focusing is completed.

[0004] However, the manual focusing method not only has low focusing efficiency, but also cannot dynamically adjust the focus during equipment operation, resulting in poor product processing quality. If the machine is stopped to repeatedly adjust the focus, the overall processing efficiency is greatly reduced. Utility Model Content

[0005] The utility model mainly provides an automatic focusing laser processing device to solve the problem that currently the focusing efficiency is low and dynamic focusing cannot be achieved due to manual adjustment of the laser focus.

[0006] To achieve the above-mentioned purpose, the utility model proposes an automatic focusing laser processing device, which includes a laser generator, a field lens, a first detector and a driving module; wherein:

[0007] The laser generator and the field lens are spaced apart, the field lens is mounted on the driving module, the laser generator is used to emit laser, and the field lens is used to focus the laser on the surface of the workpiece;

[0008] The first detector is electrically connected to the driving module, and the first detector is used to detect the distance between the field lens and the workpiece surface in real time. The driving module drives the field lens to move along the laser path according to the distance between the field lens and the workpiece surface detected by the first detector, so as to adaptively focus the laser on the workpiece surface.

[0009] In some embodiments of the present invention, the driving module includes a power component and a support component, the field lens is connected to the support component, the support component is connected to the power component, and the power component is used to drive the support component to move along the laser path to drive the field lens to approach or move away from the workpiece.

[0010] In some embodiments of the present invention, the support assembly is disposed above the power assembly in the vertical direction; or, the support assembly and the power assembly are disposed side by side in the horizontal direction.

[0011] In some embodiments of the present invention, the power assembly includes a mounting seat, a support, a power member, a transmission member and a sliding member; wherein,

[0012] The mounting seat and the support are spaced apart along the moving direction of the support assembly, the power member is mounted on the mounting seat, the transmission member rotates on the support, and the power member is connected to the transmission member through a coupling;

[0013] The sliding member is sleeved on the transmission member and threadedly matched with the transmission member. The sliding member is also connected to the support assembly. The power member is used to drive the transmission member to rotate, so as to drive the support assembly to move through the sliding member.

[0014] In some embodiments of the present invention, the power component is a servo motor; or, the power component is a stepping motor.

[0015] In some embodiments of the present invention, the driving module further includes a guide assembly, which is slidably matched with the support assembly and is used to guide the movement of the support assembly.

[0016] In some embodiments of the utility model, the guide assembly includes a slide rail and a guide block, the support assembly is connected to one side of the guide block, a slide groove is provided on the side of the guide block away from the support assembly, and the slide rail slides in cooperation with the slide groove.

[0017] In some embodiments of the present invention, the support assembly includes a plurality of support blocks, the plurality of support blocks are stacked and fixedly connected to each other.

[0018] In some embodiments of the present invention, the first detector is a distance sensor; or, the first detector is a visual sensor.

[0019] In some embodiments of the utility model, the automatic focusing laser processing device also includes a second detector, which is electrically connected to the driving module, and the second detector is used to detect the processing status of the workpiece in real time and provide feedback to the driving module.

[0020] The beneficial effect of the utility model is as follows: different from the prior art, the automatic focusing laser processing device disclosed in the utility model detects the distance between the field lens and the workpiece in real time through the first detector, and automatically adjusts the distance between the field lens and the workpiece through the driving module. Compared with the previous manual operation method, such a setting can not only save time and improve the focusing efficiency, but also does not require shutdown operation. Dynamic focusing can be achieved during the processing process, so that the field lens can always focus the laser on the surface of the workpiece. Even when the workpiece is abnormally offset or wrinkled, it can ensure that the field lens and the workpiece are within a reasonable distance range, so that the laser focus can fall on the surface of the workpiece, increase the fault tolerance rate, and effectively avoid the phenomenon of defocusing, thereby improving the processing quality of the workpiece and improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a structural schematic diagram of an embodiment of the automatic focusing laser processing device of the utility model;

[0023] Figure 2 It is a schematic structural diagram of an embodiment of the first detector, the second detector and the field lens of the utility model.

[0024] Description of Figure Numbers:

[0025] 100. Automatic focusing laser processing device; 1. Field lens; 2. First detector; 3. Driving module; 31. Power assembly; 311. Mounting seat; 312. Support; 313. Power member; 314. Transmission member; 315. Sliding member; 32. Support assembly; 321. Support block; 33. Guide assembly; 331. Slide rail; 332. Guide block; 4. Second detector. 5. Workpiece.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their 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 at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] The utility model proposes an automatic focusing laser processing device, referring to Figure 1 The automatic focusing laser processing device 100 can automatically focus during the laser processing of the workpiece 5 so that the laser focus falls on the surface of the workpiece 5. It can also dynamically focus during the processing, which greatly improves the production efficiency.

[0031] The workpiece 5 may be a film material strip or a pole piece strip, and the automatic focusing laser processing device 100 can process the film material strip or the pole piece strip, such as pole ear cutting, mark hole cutting, and sheet cutting. For the sake of convenience, the following will take the pole piece strip as an example for explanation, which is only an example and defines the workpiece 5.

[0032] Reference Figure 1 and Figure 2The automatic focusing laser processing device 100 includes a laser generator (not shown in the figure), a field lens 1, a first detector 2 and a driving module 3. The laser generator and the field lens 1 are arranged at intervals, the field lens 1 is installed on the driving module 3, the laser generator is used to emit laser, and the field lens 1 is used to focus the laser on the surface of the workpiece 5.

[0033] The first detector 2 is electrically connected to the driving module 3. The first detector 2 is used to detect the distance between the field lens 1 and the surface of the workpiece 5 in real time. The driving module 3 drives the field lens 1 to move along the laser path according to the distance between the field lens 1 and the surface of the workpiece 5 detected by the first detector 2, so as to adaptively focus the laser on the surface of the workpiece 5.

[0034] Based on the above-mentioned scheme, the first detector 2 is used to detect the distance between the field lens 1 and the workpiece 5 in real time, and the driving module 3 is used to automatically adjust the distance between the field lens 1 and the workpiece 5. Compared with the previous manual operation method, such a setting can not only save time and improve the focusing efficiency, but also does not require shutdown operation, and there is no need to repeatedly adjust the focus to waste time, thereby improving equipment efficiency. It can effectively avoid the phenomenon that the workpiece 5 cannot be automatically identified and adjusted when it changes, resulting in waste of materials when problems are found. Dynamic focusing can be achieved during the processing process, so that the field lens 1 can always focus the laser on the surface of the workpiece 5. Even when the workpiece 5 is abnormally offset or wrinkled, it can ensure that the field lens 1 and the workpiece 5 are within a reasonable distance range, automatically compensate the focal length, so that the laser focus can fall on the surface of the workpiece 5, increase the fault tolerance rate, and effectively avoid the phenomenon of defocusing, thereby improving the processing quality of the workpiece 5 and improving the product yield.

[0035] The first detector 2 may be a distance sensor, such as a laser displacement sensor, an ultrasonic sensor or an infrared sensor, etc. The distance sensor is used to detect the distance between the field lens 1 and the workpiece 5 in real time, and to provide real-time feedback to the driving module 3. The driving module 3 adaptively adjusts the distance between the field lens 1 and the workpiece 5 according to the detected distance between the field lens 1 and the workpiece 5 to achieve dynamic focusing.

[0036] The first detector 2 may also be a visual sensor, such as an industrial camera, a CCD image sensor, etc. In the embodiment of the present application, the first detector 2 is a distance measuring sensor, which is only an example and does not limit the first detector 2.

[0037] When the pole piece material moves, due to the manufacturing problems and working conditions of the pole piece material itself, the pole piece material is actually an irregular curve (such as a wavy line, S line, etc.), which causes the pole piece material to leave the focus of the laser during the processing and cause processing abnormalities.

[0038] The first detector 2 detects the curve variation law of the electrode strip in real time (such as Figure 2As shown in the figure, according to the curve of the pole piece strip, the abnormal mutations are eliminated, the average of the curve is taken according to the length of the pole piece strip, the curve is converted into a straight line, the distance between the field lens 1 and the pole piece strip is converted according to the average of the pole piece strip, and the position of the field lens 1 is adjusted in real time to ensure that the distance from the field lens 1 to the pole piece strip is constant in dynamic state.

[0039] Based on the above principle, the distance between the field lens 1 and the workpiece 5 is accurately detected so that the laser focus always falls on the surface of the workpiece 5, thereby effectively avoiding the situation where the workpiece 5 is out of focus and abnormal cutting occurs, thereby improving the processing quality of the workpiece 5.

[0040] Continue to refer to Figure 1 and Figure 2 The driving module 3 includes a power component 31 and a support component 32. The field lens 1 is connected to the support component 32. The support component 32 is connected to the power component 31. The power component 31 is used to drive the support component 32 to move along the laser path to drive the field lens 1 to approach or move away from the workpiece 5.

[0041] With this setting, automatic focusing can be achieved without repeated manual operations. This not only greatly improves the efficiency of adjusting the laser focus, but also has a fast response speed and increased fault tolerance, thereby improving production efficiency.

[0042] The support assembly 32 is arranged above the power assembly 31 in the vertical direction; or, the support assembly 32 and the power assembly 31 are arranged side by side in the horizontal direction. In the embodiment of the present application, the support assembly 32 and the power assembly 31 are arranged side by side in the horizontal direction. In this way, the power assembly 31 and the support assembly 32 can be adaptively arranged according to the processing environment on site, so as to improve the applicability of the automatic focusing laser processing device 100.

[0043] Continue to refer to Figure 1 and Figure 2 The power assembly 31 includes a mounting seat 311, a support 312, a power member 313, a transmission member 314, and a sliding member 315. The mounting seat 311 and the support 312 are spaced apart along the moving direction of the support assembly 32. The power member 313 is mounted on the mounting seat 311. The transmission member 314 rotates on the support 312. The power member 313 is connected to the transmission member 314 through a coupling. The sliding member 315 is sleeved on the transmission member 314 and is threadedly coupled with the transmission member 314. The sliding member 315 is also connected to the support assembly 32. The power member 313 is used to drive the transmission member 314 to rotate, so as to drive the support assembly 32 to move through the sliding member 315.

[0044] Such a setting not only has a simple structure and can effectively drive the field lens 1 to move so as to adaptively adjust the distance between the field lens 1 and the workpiece 5, but also can ensure the stability of driving the field lens 1 to move, so that the laser focus can stably fall on the surface of the workpiece 5, thereby improving the processing quality of the workpiece 5.

[0045] The transmission member 314 is arranged in a long strip shape, and there are two supports 312. One end of the transmission member 314 is rotatably mounted on one of the two supports 312, and the other end is mounted on the other of the two supports 312. The transmission member 314 can be a screw rod or other structural member.

[0046] The sliding member 315 may be a slider or other structural member, as long as it can be threadedly matched with the transmission member 314 , so that the transmission member 314 can drive the sliding member 315 to move.

[0047] The power member 313 is a servo motor, or the power member 313 is a stepping motor. In the embodiment of the present application, the power member 313 is a servo motor, which drives the transmission member 314 to rotate and indirectly drives the sliding member 315 to move, so as to drive the field lens 1 to move, so as to improve the movement accuracy of the field lens 1, improve the accuracy of the laser focus falling on the surface of the workpiece 5, and improve the processing quality of the workpiece 5.

[0048] Continue to refer to Figure 1 and Figure 2 The driving module 3 further includes a guide assembly 33, which is slidably matched with the support assembly 32 and is used to guide the movement of the support assembly 32. The guide assembly 33 is used to ensure the stability of the movement of the support assembly 32, effectively avoiding the shaking of the field lens 1 during the movement, so that the field lens 1 can accurately focus the laser on the surface of the workpiece 5.

[0049] The guide assembly 33 includes a slide rail 331 and a guide block 332. The support assembly 32 is connected to one side of the guide block 332. A slide groove is provided on the side of the guide block 332 away from the support assembly 32. The slide rail 331 is slidably matched with the slide groove. The slide rail 331 and the guide block 332 are used to improve the smoothness of movement of the support assembly 32 and the smoothness of movement of the field lens 1.

[0050] The support assembly 32 includes a plurality of support blocks 321, which are stacked and fixedly connected to each other. The plurality of support blocks 321 can adjust the height of the field lens 1 according to the actual processing conditions, so that different positions of the workpiece 5 can be processed, thereby improving the performance of the automatic focusing laser processing device 100.

[0051] The multiple support blocks 321 may be connected by screws or snap connections, and the multiple support blocks 321 may also be fixed by other connections, as long as it can be ensured that the multiple support blocks 321 can be fixed together.

[0052] Continue to refer to Figure 1 and Figure 2 The automatic focusing laser processing device 100 further includes a second detector 4, which is electrically connected to the driving module 3, that is, electrically connected to the power member 313. The second detector 4 is used to detect the processing status of the workpiece 5 in real time and provide feedback to the driving module 3. This arrangement can improve the production quality of the workpiece 5 and effectively reduce the possibility of defective products.

[0053] During the processing, if the second detector 4 detects that the workpiece 5 is not penetrated, the second detector 4 provides real-time feedback to the driving force member 313, and the power member 313 drives the transmission member 314 to rotate, so that the sliding member 315 can drive the support assembly 32 to move, thereby driving the field lens 1 to move, so as to adjust the laser focal length. After the laser focal length is adjusted, the laser generator emits a laser, and this operation is repeated until the surface of the workpiece 5 is penetrated.

[0054] The second detector 4 can be any distance measuring sensor such as a laser displacement sensor, an ultrasonic sensor or an infrared sensor. The distance measuring sensor can be used to detect the processing status of the workpiece 5 in real time. The second detector 4 can also be a visual sensor, such as an industrial camera, a CCD image sensor, etc.

[0055] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An automatic focusing laser processing device, characterized in that: The automatic focusing laser processing device comprises a laser generator, a field lens, a first detector and a driving module; wherein, The laser generator and the field lens are spaced apart, the field lens is mounted on the driving module, the laser generator is used to emit laser, and the field lens is used to focus the laser on the surface of the workpiece; The first detector is electrically connected to the driving module, and the first detector is used to detect the distance between the field lens and the workpiece surface in real time. The driving module drives the field lens to move along the laser path according to the distance between the field lens and the workpiece surface detected by the first detector, so as to adaptively focus the laser on the workpiece surface.

2. The automatic focusing laser processing device according to claim 1, characterized in that: The driving module includes a power component and a support component, the field lens is connected to the support component, the support component is connected to the power component, and the power component is used to drive the support component to move along the laser path to drive the field lens to approach or move away from the workpiece.

3. The automatic focusing laser processing device according to claim 2, characterized in that: The support assembly is arranged above the power assembly in the vertical direction; or, the support assembly and the power assembly are arranged side by side in the horizontal direction.

4. The automatic focusing laser processing device according to claim 2, characterized in that: The power assembly includes a mounting seat, a support, a power member, a transmission member and a sliding member; wherein, The mounting seat and the support are spaced apart along the moving direction of the support assembly, the power member is mounted on the mounting seat, the transmission member rotates on the support, and the power member is connected to the transmission member through a coupling; The sliding member is sleeved on the transmission member and threadedly matched with the transmission member. The sliding member is also connected to the support assembly. The power member is used to drive the transmission member to rotate, so as to drive the support assembly to move through the sliding member.

5. The automatic focusing laser processing device according to claim 4, characterized in that: The power component is a servo motor; or, the power component is a stepping motor.

6. The automatic focusing laser processing device according to claim 2, characterized in that: The driving module also includes a guide component, which is slidably matched with the support component and is used to guide the movement of the support component.

7. The automatic focusing laser processing device according to claim 6, characterized in that: The guide assembly comprises a slide rail and a guide block. The support assembly is connected to one side of the guide block. A slide groove is provided on the side of the guide block away from the support assembly. The slide rail is slidably matched with the slide groove.

8. The automatic focusing laser processing device according to claim 2, characterized in that: The support assembly includes a plurality of support blocks, the plurality of support blocks are stacked and fixedly connected to each other.

9. The automatic focusing laser processing device according to claim 1, characterized in that: The first detector is a distance measuring sensor; or, the first detector is a visual sensor.

10. The automatic focusing laser processing device according to claim 1, characterized in that: The automatic focusing laser processing device also includes a second detector, which is electrically connected to the driving module. The second detector is used to detect the processing status of the workpiece in real time and provide feedback to the driving module.

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