Cursor positioning device

Abstract

The present invention relates to the field of laser processing technology, and in particular to a cursor positioning device, comprising a central axis, which is fixedly mounted on a frame; a guide roller, which is rotatably sleeved on the central axis; a rotating bracket, which is mounted on the central axis across the guide roller, and the rotating bracket can rotate relative to the central axis; and a photoelectric sensing component, which can be slidably arranged on the rotating bracket. The present invention wraps a composite film around the guide roller, and under the action of tension, the composite film is always tightly attached to the outer peripheral surface of the guide roller, thereby avoiding wrinkles and shaking caused by local relaxation of the composite film, and ensuring accurate recognition of the photoelectric sensing component; by setting two pairs of rotating brackets, the angle between the two pairs of rotating brackets can be flexibly adjusted according to the cursor spacing on the composite film to meet different processing requirements; the distance between the photoelectric sensing component and the composite film remains unchanged, ensuring the accurate stability of the photoelectric sensing component in identifying the focal length control, thereby ensuring the accuracy of the laser processing position.

Description

Technical Field

[0001] The invention relates to the technical field of laser processing, and in particular to a cursor positioning device. Background Art

[0002] In the field of flexible packaging technology, in order to meet people's needs for convenient unpacking, the easy-to-open and easy-tear function on the outer packaging is becoming more and more widely used. Among them, the linear easy-tear function of the packaging composite film achieved by laser processing (marking or etching) is one of them.

[0003] The cursor positioning device currently equipped in laser processing equipment, such as Figure 1 As shown, the photoelectric probe 1' is located above the suspended composite film 2'. After the photoelectric probe 1' recognizes the cursor 3', it feeds back a signal to the laser head 4', and the laser head 4' performs the processing. The laser processing equipment in the prior art mainly has the following two problems:

[0004] First, due to the characteristics of its material, plastic composite films used for packaging are prone to wrinkles and jitters caused by local relaxation, which affects the accurate and rapid recognition of the photoelectric probe, and then causes the laser head to "miss" the problem, resulting in a high product defective rate and low customer satisfaction; second, when switching composite films with different cursor spacing, it takes a long time to adjust the equipment, resulting in low production efficiency.

[0005] Therefore, it is necessary to propose a cursor positioning device to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a cursor positioning device, in which a photoelectric sensing component can quickly and accurately identify the cursor and can quickly adjust and adapt when the cursor spacing is different, thereby ensuring processing efficiency.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A cursor positioning device, comprising:

[0009] A central axis, which is fixedly mounted on the frame;

[0010] A guide roller, which is rotatably sleeved on the central shaft;

[0011] A rotating bracket, which is mounted on the central axis across the guide roller, and the rotating bracket can rotate relative to the central axis;

[0012] The photoelectric sensing component can be slidably arranged on the rotating bracket.

[0013] Specifically, in actual use, the composite film to be processed by laser is wound and covered on the guide roller. Under the action of tension, the composite film is always in close contact with the outer peripheral surface of the guide roller, avoiding the wrinkles and shaking caused by the local relaxation of the composite film in the prior art, thereby ensuring the accurate recognition of the photoelectric sensing component. The distance between the photoelectric sensing component and the composite film on the rotating bracket remains unchanged, ensuring the accurate stability of the photoelectric sensing component's recognition focal length control. If the distance is too large or too small, it will lead to blurred recognition, causing the photoelectric sensing component to capture inaccurate signals, thereby affecting the accuracy of laser processing.

[0014] As a preferred technical solution, there are two pairs of rotating brackets, and the photoelectric sensing components are respectively arranged on the two pairs of rotating brackets.

[0015] Specifically, both pairs of rotating brackets can rotate relative to the central axis, and the angle between the two pairs of rotating brackets can be adjusted. The arc length between the light spots irradiated on the guide roller by the photoelectric sensing components on the two pairs of rotating brackets is approximately the cursor spacing of the composite film. If the cursor spacing is small, the angle between the two pairs of rotating brackets is reduced; if the cursor spacing is large, the angle between the two pairs of rotating brackets is increased.

[0016] As a preferred technical solution, the rotating bracket is U-shaped, the two vertical parts of the rotating bracket can be rotatably mounted on the central axis respectively, the horizontal part of the rotating bracket is parallel to the axis of the guide roller, and the photoelectric sensing component can be slidably arranged on the horizontal part.

[0017] Specifically, the U-shaped rotating bracket is rotatably set on the central axis through the vertical parts at both ends, and the photoelectric sensing component is set on the horizontal part parallel to the axis of the guide roller. This structure ensures that no matter how the angle of the rotating bracket is adjusted, the vertical distance between the photoelectric sensing component and the guide roller remains unchanged, thereby ensuring the accuracy and stability of the photoelectric sensing component in identifying focal length control.

[0018] As a preferred technical solution, a first locking device is provided on the vertical portion, and the first locking device can lock the rotating bracket with the central axis.

[0019] Specifically, the angle of the rotating bracket is adjusted according to actual processing requirements, and after adjustment, the rotating bracket is locked with the central axis by a first locking device to prevent rotational dislocation during operation.

[0020] As a preferred technical solution, the photoelectric sensing component includes a mounting seat and a photoelectric sensing head. The mounting seat can be slidably arranged on the horizontal portion, and the photoelectric sensing head is fixed on the mounting seat.

[0021] As a preferred technical solution, a second locking device is provided on the mounting seat, and the second locking device can lock the mounting seat and the horizontal portion.

[0022] Specifically, the position of the photoelectric sensing component can be adjusted laterally on the horizontal part of the rotating bracket according to the layout of the composite film or the cursor position, and the photoelectric sensing component can be fixed on the horizontal part by the second locking device to meet different processing needs.

[0023] As a preferred technical solution, the two vertical parts are welded to the horizontal part.

[0024] As a preferred technical solution, a bearing is provided between the guide roller and the central axis.

[0025] As a preferred technical solution, the cross-section of the horizontal portion is rectangular or circular.

[0026] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0027] 1) The cursor positioning device provided by the present invention arranges a guide roller to wrap the composite film around the guide roller. Under the action of tension, the composite film is always tightly attached to the outer peripheral surface of the guide roller, thereby avoiding wrinkles and jitters caused by local relaxation of the composite film in the prior art, ensuring accurate recognition of the photoelectric sensing component, thereby ensuring the accuracy of the laser processing position.

[0028] 2) The cursor positioning device provided by the present invention is provided with two pairs of rotating brackets, and the angle between the two pairs of rotating brackets can be adjusted according to the cursor spacing on the composite film. If the cursor spacing is small, the angle between the two pairs of rotating brackets is reduced; if the cursor spacing is large, the angle between the two pairs of rotating brackets is increased; since the photoelectric sensing component is slidably arranged on a horizontal part parallel to the guide roller, the distance between the photoelectric sensing component and the composite film always remains unchanged, ensuring the accurate stability of the photoelectric sensing component in identifying the focal length control, thereby ensuring the accuracy of the laser processing position.

[0029] 3) The cursor positioning device provided by the present invention can adjust the position of the photoelectric sensing component laterally on the horizontal part of the rotating bracket according to the layout of the composite film or the laser processing position, and fix the photoelectric sensing component on the horizontal part through a second locking device to meet different processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a cursor positioning device provided by the prior art;

[0031] Figure 2 It is a structural schematic diagram of a cursor positioning device provided by the present invention.

[0032] In the figure:

[0033] 1'-photoelectric probe; 2'-composite film; 3'-cursor; 4'-laser head;

[0034] 1-guide roller; 2-rotating bracket; 21-vertical part; 22-horizontal part; 3-photoelectric sensing component; 31-second locking device. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and implementation methods. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0036] This embodiment provides a cursor positioning device, such as Figure 2 As shown, it includes a central axis fixedly mounted on a frame (not shown in the figure), a guide roller 1 rotatably mounted on the central axis, a rotating bracket 2 mounted on the central axis across the guide roller 1, and a photoelectric sensing component 3 slidably arranged on the rotating bracket 2, wherein the rotating bracket 2 can rotate relative to the central axis.

[0037] In actual use, the composite film to be processed by laser is wound and covered on the guide roller 1. Under the action of tension, the composite film is always closely attached to the outer peripheral surface of the guide roller 1 to avoid wrinkles and shaking caused by local relaxation of the composite film, thereby ensuring accurate recognition of the photoelectric sensing component 3. The distance between the photoelectric sensing component 3 on the rotating bracket 2 and the composite film remains unchanged to ensure the accurate stability of the photoelectric sensing component 3 in identifying the focal length control. If the distance is too large or too small, it will lead to blurred recognition, causing the photoelectric sensing component 3 to capture inaccurate signals, thereby affecting the accuracy of laser processing.

[0038] Furthermore, a bearing is provided between the guide roller 1 and the central axis. When the composite film covering the outer peripheral surface of the guide roller 1 passes by at high speed, the guide roller 1 will be driven to rotate at high speed on the central axis to keep the composite film always close to the guide roller 1, ensuring accurate identification of the photoelectric sensing component 3 during the entire processing process and ensuring the accuracy of the laser processing position.

[0039] The cursor positioning device in this embodiment includes two pairs of rotating brackets 2, and the two pairs of rotating brackets 2 are staggered. A photoelectric sensing component 3 is respectively arranged on each of the two pairs of rotating brackets 2. Specifically, the two pairs of rotating brackets 2 can rotate relative to the central axis, and the angle between the two can be adjusted. The arc length between the light spots irradiated on the guide roller 1 by the photoelectric sensing components 3 on the two pairs of rotating brackets 2 is approximately the cursor spacing of the composite film. If the cursor spacing is small, the angle between the two pairs of rotating brackets 2 is reduced; if the cursor spacing is large, the angle between the two pairs of rotating brackets 2 is increased. Such a structural setting ensures that when the composite film with different cursor spacing is switched, the angle of the rotating bracket 2 and the position of the photoelectric sensing component 3 can be quickly adjusted according to the cursor spacing, which greatly saves adjustment time and improves production efficiency.

[0040] Furthermore, the photoelectric sensing component 3 is electrically connected to the control system (not shown in the figure), and the laser processing component (not shown in the figure) is also electrically connected to the control system. When the photoelectric sensing component 3 recognizes the cursor on the composite film, the signal is fed back to the control system, and the control system controls the laser processing component to perform processing. In this process, there are the following problems. Since the current laser processing has a certain signal delay, and one signal controls 2-4 groups of laser processing components, the width of each group of laser processing components (marking or etching) is limited. Therefore, for wide-width products with a large number of cursor columns, two or more photoelectric sensing components 3 need to be used simultaneously to meet the processing requirements. In this embodiment, a photoelectric sensing component 3 is set on each of the two rotating brackets 2 to meet general processing requirements.

[0041] In this embodiment, the rotating bracket 2 is U-shaped, including two vertical parts 21 and a horizontal part 22, and the horizontal part 22 is vertically connected to the two vertical parts 21. It can be understood that the two vertical parts 21 and the horizontal part 22 can be welded or integrally formed. For the convenience of processing, the welding form is preferred in this embodiment. Furthermore, the horizontal part 22 spans the guide roller 1 and is arranged parallel to the axis of the guide roller 1. The two vertical parts 21 are respectively located at both ends of the guide roller 1 and are rotatably sleeved on the central axis. A first locking device (not shown in the figure) is provided on the vertical part 21. The first locking device can lock the rotating bracket 2 with the central axis, and the photoelectric sensing component 3 can be slidably arranged on the horizontal part 22.

[0042] Specifically, the angle of the rotating bracket 2 is adjusted according to actual processing requirements, and after adjustment, the rotating bracket 2 is locked with the central axis by the first locking device to prevent rotational dislocation during operation. It is understandable that the first locking device can be a threaded fastener, but is not limited thereto.

[0043] Furthermore, the U-shaped rotating bracket 2 is rotatably set on the central axis through the vertical parts 21 at both ends, and the photoelectric sensing component 3 is set on the horizontal part 22 parallel to the guide roller 1. This structure ensures that no matter how the angle of the rotating bracket 2 is adjusted, the vertical distance between the photoelectric sensing component 3 and the guide roller 1 remains unchanged, thereby ensuring that the distance between the photoelectric sensing component 3 and the composite film remains unchanged, ensuring the accurate stability of the photoelectric sensing component 3 in identifying the focal length control, thereby ensuring the accuracy of the identification signal.

[0044] In this embodiment, the photoelectric sensing assembly 3 includes a mounting seat and a photoelectric sensing head, the mounting seat can be slidably arranged on the horizontal portion 22, and the photoelectric sensing head is fixed on the mounting seat. Preferably, a second locking device 31 is provided on the mounting seat, and the second locking device 31 can lock the mounting seat and the horizontal portion 22. Specifically, the position of the photoelectric sensing assembly 3 can be adjusted laterally on the horizontal portion 22 of the rotating bracket 2 according to the layout or cursor position of the composite film, and the photoelectric sensing assembly 3 can be fixed on the horizontal portion 22 by the second locking device 31 to meet different processing needs. The second locking device 31 in this embodiment can be a threaded fastener, but is not limited thereto.

[0045] Specifically, a through hole is provided on the mounting seat of the photoelectric sensing component 3, and a slide groove matching the horizontal portion 22 of the rotating bracket 2 is provided in the through hole. The photoelectric sensing component 3 is equivalent to a slider, and can slide horizontally on the horizontal portion 22 through the slide groove. Furthermore, the cross-section of the horizontal portion 22 is rectangular or circular, and the present embodiment is preferably rectangular. Accordingly, the through hole of the mounting seat is a rectangular hole. The matching of the horizontal portion 22 with a rectangular cross-section and the rectangular hole can effectively prevent the mounting seat from rotating relative to the horizontal portion 22 during operation due to gravity or loosening of the second locking device 31, thereby causing deviations in the recognition signal of the photoelectric sensing head, affecting the accurate processing of the laser processing component.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cursor positioning device, characterized in that: include: A central axis, which is fixedly mounted on the frame; A guide roller (1) is rotatably sleeved on the central shaft; A rotating bracket (2) is installed on the central axis across the guide roller (1), and the rotating bracket (2) can rotate relative to the central axis; A photoelectric sensing component (3) which is slidably arranged on the rotating bracket (2); There are two pairs of rotating brackets (2), the angle between the two pairs of rotating brackets (2) can be adjusted according to the cursor spacing, and the photoelectric sensing components (3) are respectively arranged on the two pairs of rotating brackets (2).

2. The cursor positioning device according to claim 1, characterized in that: The rotating bracket (2) is U-shaped, and the two vertical parts (21) of the rotating bracket (2) are respectively rotatably mounted on the central axis, the horizontal part (22) of the rotating bracket (2) is parallel to the axis of the guide roller (1), and the photoelectric sensing component (3) is slidably arranged on the horizontal part (22).

3. The cursor positioning device according to claim 2, characterized in that: The vertical portion (21) is provided with a first locking device, and the first locking device can lock the rotating bracket (2) and the central axis.

4. The cursor positioning device according to claim 2, characterized in that: The photoelectric sensing component (3) comprises a mounting seat and a photoelectric sensing head. The mounting seat can be slidably arranged on the horizontal portion (22), and the photoelectric sensing head is fixed on the mounting seat.

5. The cursor positioning device according to claim 4, characterized in that: A second locking device (31) is provided on the mounting seat, and the second locking device (31) can lock the mounting seat and the horizontal portion (22).

6. The cursor positioning device according to claim 2, characterized in that: The two vertical parts (21) are welded to the horizontal part (22).

7. The cursor positioning device according to claim 1, characterized in that: A bearing is provided between the guide roller (1) and the central shaft.

8. The cursor positioning device according to claim 2, characterized in that: The cross section of the horizontal portion (22) is rectangular or circular.

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