Focal length correction device and laser processing system

Abstract

The utility model discloses a focal length correction device and a laser processing system.The focal length correction device comprises a clamping part, a positioning mechanism and a marking piece, the clamping part is detachably connected to a rack, the positioning mechanism is provided with two opposite sides, one side of the positioning mechanism is connected to the clamping part, the other side of the positioning mechanism is provided with a mounting part, and the marking piece is mounted on the mounting part; the laser emitting device is used for emitting laser to the marking sheet and focusing the laser on the marking sheet to form light spots. Therefore, the positioning accuracy of the focus can be improved, the reliability of focal length adjustment is improved, and the precision of laser processing is further improved.

Description

Technical Field

[0001] The present application relates to the field of laser processing equipment, and in particular to a focal length correction device and a laser processing system. Background Art

[0002] When switching positions in laser processing, it is usually necessary to readjust the focal length of the laser so that the laser is focused on the target processing position to ensure processing accuracy. At present, when adjusting the laser focal length, the method of holding the marking film is mostly used. After adjusting the laser focal length, the brightness on the marking film is observed by the naked eye to determine the approximate focal position. However, since hand-held operation is prone to displacement deviation and the accuracy of naked eye observation is limited, this method is not accurate enough for focal positioning, and scattering is prone to occur during laser processing, resulting in reduced processing accuracy. Utility Model Content

[0003] In order to solve at least one of the above technical problems, the present application provides a focal length correction device and a laser processing system, which can improve the positioning accuracy of the focus to improve the reliability of focal length adjustment, thereby improving the accuracy of laser processing.

[0004] To achieve the above-mentioned purpose, in a first aspect, the present application discloses a focal length correction device, which is applied to a laser processing system. The laser processing system includes a laser emitting device and a frame. The focal length correction device includes:

[0005] A clamping portion, the clamping portion being detachably connected to the frame;

[0006] A positioning mechanism, the positioning mechanism having two opposite sides, one side of the positioning mechanism being connected to the clamping portion, and the other side of the positioning mechanism being provided with a mounting portion; and

[0007] The marking sheet is installed on the installation part, and the laser emitting device is used to emit laser to the marking sheet and focus the laser on the marking sheet to form a light spot.

[0008] As an optional embodiment, in an embodiment of the first aspect of the present application, the mounting portion includes a limiting portion and a mounting groove having a first opening, the mounting groove is formed by being recessed inward from a side of the positioning mechanism away from the clamping portion, the first opening is arranged toward the direction of the laser emitting device, the marking sheet is placed in the mounting groove, the limiting portion is connected to the side wall of the mounting groove and encloses the first opening to partially cover the first opening.

[0009] As an optional implementation, in an embodiment of the first aspect of the present application, the focal length correction device also includes a plurality of threaded fasteners, the limiting portion is provided with a plurality of positioning screw holes which are spaced apart and connected to the mounting groove, the plurality of threaded fasteners correspond one-to-one to the plurality of positioning screw holes and are threadedly connected, and the threaded fasteners are used to extend into the mounting groove through the positioning screw holes and abut against the marking sheet.

[0010] As an optional implementation, in an embodiment of the first aspect of the present application, the mounting groove is provided with a second opening along the height direction of the focal length correction device, and the second opening is arranged in a direction away from the ground.

[0011] As an optional implementation, in an embodiment of the first aspect of the present application, the positioning mechanism includes a fixing part, an adjusting part and a rotating shaft, the rotating shaft is sequentially arranged through the fixing part and the adjusting part along the height direction of the focal length correction device, the clamping part is connected to the fixing part, the mounting part is arranged on the adjusting part, and the adjusting part is rotatably connected to the rotating shaft so that the adjusting part drives the marking sheet to rotate around the center line direction of the rotating shaft.

[0012] As an optional implementation, in an embodiment of the first aspect of the present application, the focal length correction device also includes a dial, and the dial is sleeved on the outer circumference of the rotating shaft.

[0013] As an optional embodiment, in an embodiment of the first aspect of the present application, the focal length correction device also includes two positioning nuts, and along the height direction of the focal length correction device, the two positioning nuts are respectively located at two ends of the positioning mechanism, and the rotating shaft is provided with an external thread section, and each of the positioning nuts is respectively threadedly connected to the external thread section, and the two positioning nuts are used to respectively abut against the two ends of the positioning mechanism to limit the rotation of the adjusting part.

[0014] As an optional implementation, in an embodiment of the first aspect of the present application, the clamping portion is detachably connected to the positioning mechanism.

[0015] As an optional implementation, in an embodiment of the first aspect of the present application, the marking sheet is provided with a scale or a shape mark to provide a size reference for measuring the size of the light spot.

[0016] In the second aspect, the present application discloses a laser processing system, including a laser emitting device, a frame and a focal length correction device as described in the first aspect above, wherein the clamping part is detachably connected to the frame, and the laser emitting device is used to emit laser to the marking sheet and focus on the marking sheet to form a light spot.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] The embodiment of the present application provides a focal length correction device and a laser processing system, the focal length correction device comprises a clamping part detachably connected to a frame and a positioning mechanism connected to the clamping part, and a mounting part for mounting a marking sheet is provided on a side of the positioning mechanism away from the clamping part, so that the laser emitted by the laser emitting device is focused on the marking sheet to form a light spot. In this way, when adjusting the focal length of the laser, the marking sheet is mounted on the frame of the laser processing system through the clamping part, and the laser forms a light spot on the marking sheet. By measuring the size of the light spot, it can be determined whether there is a deviation between the position of the marking sheet and the focus position, so as to assist in adjusting the focal length, thereby facilitating the focus of the laser to fall accurately on the marking sheet. It can be seen that by adopting the focal length correction device and laser processing system of the present application, there is no need to hold the marking piece by hand, which can avoid the displacement deviation of holding the marking piece, so that the position accuracy of the marking piece is relatively improved. At the same time, the size of the light spot is obtained by measurement, which can improve the accuracy of the focus position judgment and effectively eliminate the error of naked eye observation, thereby achieving the effect of improving the positioning accuracy of the focus, so as to improve the reliability of the laser focal length adjustment, and then help to improve the accuracy of laser processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the structure of the laser processing system disclosed in the embodiment of the present application;

[0020] Figure 2 is a schematic structural diagram of a focal length correction device disclosed in an embodiment of the present application at a viewing angle;

[0021] Figure 3 is a schematic structural diagram of the focus correction device disclosed in an embodiment of the present application at another viewing angle;

[0022] Figure 4 is a cross-sectional view of a focal length correction device disclosed in an embodiment of the present application;

[0023] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0024] Reference numerals:

[0025] 100-focal length correction device; 10-clamping part; 20-positioning mechanism; 21-fixing part; 22-adjusting part; 221-installing part; 2211-limiting part; 2212-installing groove; 2212a-first opening; 2212b-second opening; 23-rotating axis; 30-dial; 40-positioning nut; 50-threaded fastener; 200-laser processing system; 201-laser emitting device; 202-frame. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0027] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0030] The embodiment of the present application discloses a focal length correction device, which can be applied to a laser processing system to process a workpiece using a laser. The laser processing system includes a laser emitting device and a frame, and the focal length correction device is connected to the frame.

[0031] In order to facilitate understanding of the structures of the focal length correction device and the laser processing system, the focal length correction device and the laser processing system will be further described below in conjunction with embodiments and drawings.

[0032] Please also read Figures 1 to 3 The embodiment of the present application provides a laser processing system 200, which includes a focal length correction device 100, a laser emitting device 201 and a frame 202. Specifically, the focal length correction device 100 includes a clamping portion 10, a positioning mechanism 20 and a marking sheet (not shown), the clamping portion 10 is detachably connected to the frame 202, the positioning mechanism 20 has two opposite sides, one side of the positioning mechanism 20 is connected to the clamping portion 10, and the other side of the positioning mechanism 20 is provided with a mounting portion 221, the marking sheet is mounted on the mounting portion 221, and the laser emitting device 201 is used to emit laser to the marking sheet and focus on the marking sheet to form a light spot.

[0033] The focal length correction device 100 and the laser processing system 200 provided in the embodiment of the present application include a clamping part 10 detachably connected to a frame 202 and a positioning mechanism 20 connected to the clamping part 10. By providing a mounting part 221 for mounting a marking sheet on a side of the positioning mechanism 20 away from the clamping part 10, the laser emitted by the laser emitting device 201 is focused on the marking sheet to form a light spot. In this way, when adjusting the focal length of the laser, the marking sheet is mounted on the frame 202 of the laser processing system 200 through the clamping part 10, and the laser forms a light spot on the marking sheet. By measuring the size of the light spot, it can be determined whether there is a deviation between the position of the marking sheet and the focus position, so as to assist in adjusting the focal length, thereby facilitating the focus of the laser to fall accurately on the marking sheet. It can be seen that by using the focal length correction device 100 and the laser processing system 200 of the present application, there is no need to hold the marking piece by hand, which can avoid the displacement deviation of holding the marking piece, so that the position accuracy of the marking piece is relatively improved. At the same time, the size of the light spot is obtained by measurement, which can improve the accuracy of the focus position judgment and effectively eliminate the error of naked eye observation, thereby achieving the effect of improving the positioning accuracy of the focus, so as to improve the reliability of the laser focal length adjustment, which is beneficial to improve the accuracy of laser processing.

[0034] Optionally, the laser processing system 200 is a multi-station processing test platform, which switches between different stations by adjusting the rotation angle of the frame 202 relative to the laser emitting device 201 to meet the processing requirements of different surfaces of the workpiece. After switching the station, it is necessary to re-use the focal length correction device 100 for focus correction to ensure that the laser is focused on the marking sheet.

[0035] Optionally, the marking sheet is provided with a scale or shape mark to provide a size reference for measuring the size of the light spot, thereby facilitating the measurement of the light spot size and improving the efficiency of laser focusing.

[0036] In some embodiments, the sum of the sizes of the clamping portion 10 and the marking sheet and the distance from the marking sheet to the clamping portion 10 is equal to the size from the workpiece surface to be processed to the clamping surface, so that the side surface of the marking sheet facing the laser emitting device 201 is consistent with the position of the actual processing surface, thereby enabling the focusing position of the laser to be adjusted by the marking sheet of the focal length correction device 100 before processing, and after the focusing is completed, the clamping portion 10 is removed from the frame 202 and the workpiece is replaced to facilitate laser processing of the workpiece surface to be processed.

[0037] Optionally, the clamping part 10 is detachably connected to the fixing part 21 of the positioning mechanism 20. This makes it easy to replace the clamping part 10. By replacing the clamping part 10 of different sizes, the distance between the marking sheet and the frame 202 can be adjusted, so as to adapt to workpieces of different sizes to be processed, so as to expand the application range of the focal length correction device 100.

[0038] Optionally, the connection between the clamping portion 10 and the fixing portion 21 may be a threaded connection or a snap-on connection, which may be specifically configured according to actual needs and is not limited here.

[0039] Please combine Figure 2 , Figure 4 and Figure 5 In some embodiments, the positioning mechanism 20 includes a fixing portion 21, an adjusting portion 22 and a rotating shaft 23. The rotating shaft 23 is sequentially arranged on the fixing portion 21 and the adjusting portion 22 along the height direction of the focal length correction device 100. The clamping portion 10 is connected to the fixing portion 21. The mounting portion 221 is arranged on the side of the adjusting portion 22 away from the clamping portion 10. The adjusting portion 22 is rotatably connected to the rotating shaft 23, so that the adjusting portion 22 drives the marking sheet to rotate around the center line direction of the rotating shaft 23. The marking sheet is driven to rotate by the adjusting portion 22, so as to eliminate the focal length deviation caused by the rotation of the random frame 202 of the focal length correction device 100, so as to adjust the size and clarity of the light spot of the laser emitted by the laser emitting device 201 falling on the marking sheet, so that the focus of the laser falls accurately on the surface of the marking sheet, thereby being able to adapt to focal length correction at different angles.

[0040] Optionally, the focal length correction device 100 further includes a scale plate 30, which is sleeved on the outer circumference of the rotating shaft 23. The scale plate 30 is provided to quantify the rotation angle of the adjusting portion 22 relative to the fixing portion 21, so as to facilitate observation and control of the rotation angle of the adjusting portion 22 relative to the fixing portion 21, thereby avoiding deviation of the rotation angle, and making the inclination angle of the marking sheet relative to the frame 202 compatible with the different angles required for laser processing.

[0041] Optionally, the focal length correction device 100 also includes two positioning nuts 40. Along the height direction of the focal length correction device 100, the two positioning nuts 40 are respectively located at the two ends of the positioning mechanism 20. The rotating shaft 23 is provided with an external thread section. Each positioning nut 40 is respectively threadedly connected to the external thread section. The two positioning nuts 40 are used to respectively abut against the two ends of the positioning mechanism 20 (that is, one of the positioning nuts 40 abuts against the side of the adjusting part 22 away from the fixing part 21, and the other positioning nut 40 abuts against the side of the fixing part 21 away from the adjusting part 22) to limit the rotation of the adjusting part 22, thereby limiting the inclination angle of the marking sheet relative to the frame 202, so as to lock the relative position of the marking sheet and the frame 202, so that the angle required by the marking sheet and the surface to be processed remains consistent.

[0042] Optionally, the number of external thread segments can be two, and the two external thread segments are respectively located at the two ends of the positioning mechanism 20, or the number of external thread segments can be one, and the length of the external thread segment is greater than the height of the positioning mechanism 20, so as to ensure that the threaded connection between the two positioning nuts 40 and the external thread segment can lock the rotation of the adjusting part 22.

[0043] It can be understood that in other embodiments, the rotating shaft 23 is fixedly connected to the fixing part 21, and the number of the positioning nut 40 is one. The positioning nut 40 is located at the end of the adjusting part 22 away from the fixing part 21, and the positioning nut 40 is used to abut against the two ends of the adjusting part 22 together with the fixing part 21 to limit the rotation of the adjusting part 22.

[0044] Optionally, the positioning nut 40 may be a butterfly nut to facilitate holding by hand, thereby facilitating adjustment and rotation of the positioning nut 40 .

[0045] In some embodiments, the mounting portion 221 includes a limiting portion 2211 and a mounting groove 2212 having a first opening 2212a. The mounting groove 2212 is formed by being recessed inward from a side of the positioning mechanism 20 away from the clamping portion 10. The first opening 2212a is arranged toward the direction of the laser emitting device 201. The marking sheet is placed in the mounting groove 2212. The limiting portion 2211 is connected to the side wall of the mounting groove 2212 and is enclosed at the first opening 2212a to partially block the first opening 2212a.

[0046] The first opening 2212 a is provided so that the laser emitted by the laser emitting device 201 falls on the marking sheet and forms a light spot, which is helpful for measuring the size of the light spot and facilitating focal length adjustment of the focal length correction device 100 .

[0047] Optionally, the mounting groove 2212 is a rectangular groove, and the limiting portion 2211 encloses the side wall of the mounting groove 2212 close to the ground and the two side walls connected thereto, so that the limiting portion 2211 and the mounting groove 2212 enclose three connected channels to limit the three sides of the marking sheet to prevent the marking sheet from falling out of the mounting groove 2212.

[0048] It can be understood that in other embodiments, the mounting groove 2212 can also be a circular groove or an elliptical groove, etc., which can be set according to actual needs and is not limited here.

[0049] In some embodiments, along the height direction of the focal length correction device 100 , the mounting slot 2212 is provided with a second opening 2212 b , and the second opening 2212 b is arranged in a direction away from the ground, and the dial 30 is located at the opening side of the second opening 2212 b of the adjustment portion 22 .

[0050] In this way, when the marking sheet is taken in and placed through the second opening 2212b, the marking sheet is supported by the mounting groove 2212 and limited by the limiting portion 2211, so as to be stably placed in the mounting groove 2212, which is conducive to preventing the marking sheet from slipping out of the mounting groove 2212 from the first opening 2212a. At the same time, the scale plate 30 is located on the second opening 2212b side of the adjustment part 22, that is, the scale plate 30 is located on the side of the positioning mechanism 20 away from the ground, which can facilitate observation of the rotation angle of the adjustment part 22 relative to the scale plate 30, thereby facilitating adjustment of the inclination angle of the adjustment part 22 relative to the frame 202.

[0051] Optionally, the focal length correction device 100 also includes a plurality of threaded fasteners 50, the limiting portion 2211 is provided with a plurality of positioning screw holes which are spaced apart and connected to the mounting groove 2212, the plurality of threaded fasteners 50 correspond one-to-one to the plurality of positioning screw holes and are threadedly connected, and the threaded fasteners 50 are used to extend into the mounting groove 2212 through the positioning screw holes and abut against the marking sheet.

[0052] The marking sheet is fixed by arranging a plurality of threaded fasteners 50 to limit the position and tilt angle of the marking sheet in the mounting groove 2212, thereby avoiding the situation where the marking sheet deviates from the actual processing plane.

[0053] Optionally, considering three points to determine a plane, based on this, the number of threaded fasteners 50 and positioning screw holes can be at least three, and the position of the marking sheet is limited by three threaded fasteners 50, so as to help ensure that the side surface of the marking sheet facing the laser emitting device 201 is consistent with the surface to be processed.

[0054] Optionally, the threaded fastener 50 may be any one of a bolt, a screw rod or a stud, which may be specifically configured according to actual needs and is not limited here.

[0055] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A focal length correction device, applied to a laser processing system, wherein the laser processing system comprises a laser emitting device and a frame, characterized in that: The focal length correction device comprises: A clamping portion, the clamping portion being detachably connected to the frame; A positioning mechanism, the positioning mechanism having two opposite sides, one side of the positioning mechanism being connected to the clamping portion, and the other side of the positioning mechanism being provided with a mounting portion; and The marking sheet is installed on the installation part, and the laser emitting device is used to emit laser to the marking sheet and focus the laser on the marking sheet to form a light spot.

2. The focus correction device according to claim 1, characterized in that: The mounting portion includes a limiting portion and a mounting groove having a first opening, wherein the mounting groove is formed by being recessed inward from a side of the positioning mechanism away from the clamping portion, and the first opening is arranged toward the direction of the laser emitting device. The marking sheet is placed in the mounting groove, and the limiting portion is connected to the side wall of the mounting groove and enclosed at the first opening to partially cover the first opening.

3. The focus correction device according to claim 2, characterized in that: The focal length correction device also includes a plurality of threaded fasteners, the limiting portion is provided with a plurality of positioning screw holes which are spaced apart and connected to the mounting groove, the plurality of threaded fasteners correspond one-to-one to the plurality of positioning screw holes and are threadedly connected, and the threaded fasteners are used to extend into the mounting groove through the positioning screw holes and abut against the marking sheet.

4. The focus correction device according to claim 2, characterized in that: The mounting groove is provided with a second opening along the height direction of the focal length correction device, and the second opening is arranged in a direction away from the ground.

5. The focus correction device according to claim 1, characterized in that: The positioning mechanism includes a fixing part, an adjusting part and a rotating shaft, the rotating shaft is sequentially passed through the fixing part and the adjusting part along the height direction of the focal length correction device, the clamping part is connected to the fixing part, the mounting part is arranged on the adjusting part, and the adjusting part is rotatably connected to the rotating shaft so that the adjusting part drives the marking sheet to rotate around the center line direction of the rotating shaft.

6. The focus correction device according to claim 5, characterized in that: The focal length correction device also includes a scale plate, and the scale plate is sleeved on the outer circumference of the rotating shaft.

7. The focus correction device according to claim 5, characterized in that: The focal length correction device also includes two positioning nuts, which are respectively located at the two ends of the positioning mechanism along the height direction of the focal length correction device. The rotating shaft is provided with an external thread section, and each positioning nut is respectively threadedly connected to the external thread section. The two positioning nuts are used to respectively abut against the two ends of the positioning mechanism to limit the rotation of the adjustment part.

8. The focus correction device according to any one of claims 1 to 7, characterized in that: The clamping portion is detachably connected to the positioning mechanism.

9. The focus correction device according to any one of claims 1 to 7, characterized in that: The marking sheet is provided with a scale or a shape mark to provide a size reference for measuring the size of the light spot.

10. A laser processing system, characterized in that: It comprises a laser emitting device, a frame and a focal length correction device as described in any one of claims 1 to 9, wherein the clamping part is detachably connected to the frame, and the laser emitting device is used to emit laser to the marking sheet and focus on the marking sheet to form a light spot.

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