A vision-assisted wire cutting method for wire mesh routing and its auxiliary device.

Abstract

This invention provides a vision-assisted wire cutting method for wire mesh fabrication and its auxiliary device, including a positioning bracket guide rail assembly, a connecting rod, a camera, and a display screen. The connecting rod is used to fix the camera to the positioning bracket guide rail assembly. The positioning bracket guide rail assembly is used to accurately position the entire device. The guide rail of the positioning bracket guide rail assembly is parallel to the first and second main rollers, and the first and second cameras on it can slide along a direction parallel to the main rollers. This invention solves the problem of inconsistent wire mesh hole widths between the two main rollers, which can significantly reduce the number of thick and thin sheets and trapezoidal sheets near the wire mesh holes and the probability of wire breakage. This invention can also significantly reduce the difficulty of manually cutting small wire mesh holes and improve the accuracy of small wire mesh holes.

Description

Technical Field

[0001] This invention relates to the field of multi-wire cutting, particularly to the field of solar cell technology, and specifically to a vision-assisted wire cutting method for wire mesh routing and its auxiliary device. Background Technology

[0002] Currently, in many fields, rod-shaped materials need to be cut and processed to obtain sheet materials of a predetermined thickness. There are various methods for cutting rod-shaped materials, among which the two main methods are: one is the internal circular cutting method, which uses a ring-shaped internal saw and abrasive to slice the material; the second is the multi-wire cutting method, which uses high-speed reciprocating motion of metal wires to neatly cut the rod into thin sheets. Due to its higher efficiency, the multi-wire cutting method has largely replaced the internal circular cutting method.

[0003] Multi-wire cutting is currently the primary method for cutting and processing rigid materials into thin sheets. During the cutting of rods, the thickness of the sheets near the entry and exit wires at both ends is uneven due to wire vibration, resulting in numerous products with thickness defects. Therefore, a common industry practice is to leave two thicker sheets at the two free ends of the rod. If the rod is composed of two or three silicon blocks joined together, thicker sheets need to be left on both sides of each seam during the cutting process. This requires leaving gaps at the wire mesh locations corresponding to the thicker sheets, creating "wire mesh holes" during wiring—gaps with a spacing greater than two cutting groove widths.

[0004] In multi-wire cutting, the wire mesh holes are typically formed manually by adjusting the wires. As wafer thickness decreases and cutting wires become finer, the large number and narrow width of wire mesh divisions in multi-piece cutting operations become increasingly difficult to discern with the human eye alone. The most common wire mesh width is around 2-3mm; any smaller and the human eye cannot maintain consistent control. At the wire mesh hole locations, the cutting line spacing widens, and the wire mesh is not parallel; a diagonal cutting line exists. The wider the wire mesh hole and the greater the inclination of the diagonal cutting line, the greater the impact on the cutting material. A large diagonal cutting line can lead to wire breakage during the cutting process. For cutting multi-piece spliced ​​rods, with several or even dozens of wire mesh holes, manual operation becomes increasingly difficult. Furthermore, due to the limited resolution of the human eye, when adjusting the wires between the two main rollers, the distance between the wires can differ by several grooves. This results in a trapezoidal cut surface on the silicon wafer at that location, rather than a flat surface suitable for a good product, increasing material loss and defect rates. Summary of the Invention

[0005] This invention provides a vision-assisted wire cutting method for wire mesh routing and its auxiliary device, which solves the problems of low precision in manual operation, wire mesh holes being separated from the free end of the steel wire, low work efficiency, poor precision, large wire hole width, and high product defect rate in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A vision-assisted wire cutting method for mesh routing includes the following steps:

[0008] Step (1): The steel wire 9 is routed in a conventional manner to form an initial wire mesh 7 of a certain width;

[0009] Step (2): Position the vision-assisted wire cutting mesh wiring auxiliary device on the wall of the cutting machine table, and adjust the distance between the left alignment mark 10 and the right alignment mark 11 on the screen to the width of one wire hole.

[0010] Step (3): When the trace is about one silicon block width wide, stop the guide wheel routing;

[0011] Step (4): Move the first camera 41 and the second camera 42 left and right to align the left alignment mark 10 on screen A and screen B with the slot where the free end of the steel wire 9 is located.

[0012] Also includes:

[0013] Step (5): While slowly rotating the first main roller 21 and the second main roller 22, pinch the wire fixing device 12 with your fingers and pull the wire mesh 7 outward so that the free end of the steel wire 9 moves to the position aligned with the right alignment mark 11 in screen B. Rotate the first main roller 21 and the second main roller 22 in the opposite direction, pinch the wire fixing device 12 with your fingers and pull the wire mesh 7 outward so that the free end of the steel wire 9 moves to the position aligned with the right alignment mark 11 in screen A.

[0014] Also includes:

[0015] Step (6): Determine whether the free end of the steel wire 9 coincides with the right alignment mark 11 in both screen A and screen B. If they coincide, then a precise wire mesh 7 operation is completed.

[0016] Step (2) also includes a step of confirming the clarity of the steel wires 9 and the empty slots in screens A and B of the display screen 6.

[0017] A vision-assisted wire cutting subnetting wiring aid device includes a positioning bracket guide rail assembly 1, a connecting rod 3, a first camera 41, a second camera 42, and a display screen 6;

[0018] The connecting rod (3) is used to fix the first camera 41 and the second camera 42 on the positioning bracket guide rail assembly 1;

[0019] The positioning bracket guide rail assembly 1 is used to accurately position the entire device. The guide rail of the positioning bracket guide rail assembly 1 is parallel to the first main roller 21, and the first camera 41 and the second camera 42 on it can slide along a direction parallel to the main roller.

[0020] The first camera 41 and the second camera 42 have the functions of autofocus and magnification of 10-500 times, and the images they capture are displayed on the display screen 6 in real time.

[0021] The display screen 6 has a corresponding image display area for each camera. By adjustment, the left alignment mark 10 can be aligned with the free end slot of the steel wire 9 before the wire is pulled, and the right alignment mark 11 can be aligned with the target slot of the wire. The distance between the left alignment mark 10 and the right alignment mark 11 can be displayed on the display screen 6 in real time.

[0022] The connecting rod 3 is also equipped with a third camera 43.

[0023] A vision-assisted wire cutting method for mesh routing includes the following steps:

[0024] Step (1): In the three-main-roll mechanism, the steel wire 9 is conventionally routed to form an initial wire mesh 7 of a certain width;

[0025] Step (2): Position the vision-assisted wire cutting mesh wiring auxiliary device on the wall of the wire cutting machine, and adjust the distance between the left alignment mark 10 and the right alignment mark 11 on the screen to the width of one wire hole.

[0026] Step (3): When the trace is about one silicon block width wide, stop the guide wheel routing;

[0027] Step (4): Move the steel wire at the second camera 42 using the wire fixing device 12;

[0028] Step (5): Move the steel wire at point 41 of the first camera;

[0029] Step (6): Move the steel wire at the third camera 43 to determine whether the free end of the steel wire 9 coincides with the right alignment mark 11. If they coincide, a precise wire-pulling operation 7 is completed. Finally, the steel wires in screens A, B and C are aligned.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] This invention solves the following problems:

[0032] 1) It solves the complex wiring problem of multiple holes in multi-panel cutting, greatly shortening the wiring time of multi-panel cutting subnet and the waiting time for changeover;

[0033] 2) The auxiliary mechanism significantly improves the accuracy and stability of the wire hole width in the distribution network;

[0034] 3) The width of the wire hole can be flexibly controlled, from a few wire widths (0.2-1.0mm) to wire widths of several centimeters.

[0035] 4) It solves the problem of uneven width of the wire mesh holes on the two rollers, which can significantly reduce the number of thick and thin sheets and trapezoidal sheets near the wire mesh holes and the probability of wire breakage.

[0036] The present invention provides a vision-assisted wire cutting method for wire mesh splitting and wiring, along with an auxiliary device to assist manual operations in wire mesh splitting during the wiring process. This device will bring the following benefits to production efficiency and product quality:

[0037] 1) Wiring is more convenient, especially the alignment rate of the splitter network is greatly improved, thus increasing production efficiency;

[0038] 2) Quickly implements multi-hole wiring, making it easier for personnel to perform repeated operations;

[0039] 3) It can achieve small wire holes and stable and uniform wiring, which greatly improves product yield;

[0040] 4) Improved wire mesh wiring accuracy, greatly reduced wiring defects such as misaligned and diagonal lines, and stabilized and improved the quality of cutting products. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of the vision-assisted wire cutting subnetting wiring auxiliary device according to Embodiment 1 of the present invention.

[0042] Figure 2 This is a schematic diagram showing the positional relationship between the cross-shaped part on the screen and the free end of the steel wire before, during, and after the wire pulling in Embodiment 1 of the present invention.

[0043] Figure 3 This is a schematic diagram of the structure of the vision-assisted wire cutting subnetting wiring auxiliary device according to Embodiment 3 of the present invention.

[0044] Figure 4 This is a schematic diagram showing the positional relationship between the cross-shaped part on the screen and the free end of the steel wire before, during, and after the wire pulling in Embodiment 3 of the present invention.

[0045] In the diagram: 1. Positioning bracket guide rail assembly; 21. First main roller; 22. Second main roller; 23. Third main roller; 3. Connecting rod; 41. First camera; 42. Second camera; 43. Third camera; 5. Data transmission line; 6. Display screen; 7. Wire mesh; 8. Guide wheel groove; 9. Steel wire; 10. Left alignment mark; 11. Right alignment mark; 12. Wire fixing device. Detailed Implementation

[0046] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0047] The vision-assisted wire cutting mesh routing method and its auxiliary device of the present invention are applicable to the mesh routing process of cutting machines with two main rollers, three main rollers, and four main rollers. Embodiment 1 and Embodiment 2 are embodiments of mesh routing in the form of two main rollers. Example 1

[0048] like Figure 1 , Figure 2 A vision-assisted wire cutting method for subnetting includes the following steps:

[0049] Step (1): The steel wire 9 is routed in a conventional manner to form an initial wire mesh 7 of a certain width;

[0050] Step (2): Position the vision-assisted wire cutting mesh wiring auxiliary device on the wall of the cutting machine table, and adjust the distance between the left alignment mark 10 and the right alignment mark 11 on the screen to the width of one wire hole.

[0051] Step (3): When the trace is about one silicon block width wide, stop the guide wheel routing;

[0052] Step (4): Move the first camera 41 and the second camera 42 left and right to align the left alignment mark 10 on screen A with the slot where the free end of the steel wire 9 is located on screen B.

[0053] It also includes: step (5), while slowly rotating the main rollers 21 and 22, pinching the wire fixing device 12 with your fingers and pulling the wire mesh 7 outward so that the free end of the steel wire 9 moves to the position aligned with the right alignment mark 11.

[0054] It also includes: step (6), determining whether the free end of the steel wire 9 coincides with the right alignment mark 11. If they coincide, a precise wire mesh 7 operation is completed.

[0055] Step (2) also includes a step of confirming the clarity of the steel wires 9 and the empty slots in screens A and B of the display screen 6. Example 2

[0056] like Figure 1 , Figure 2 A visually assisted wire cutting subnetting wiring auxiliary device, characterized in that it includes a positioning bracket guide rail assembly 1, a connecting rod 3, a first camera 41, a second camera 42 and a display screen 6;

[0057] The connecting rod 3 is used to fix the first camera 41 on the positioning bracket guide rail assembly 1; the positioning bracket guide rail assembly 1 is used to accurately position the entire device. The guide rail of the positioning bracket guide rail assembly 1 is parallel to the main rollers 21 and 22, and the first camera 41 and the second camera 42 on it can slide along a direction parallel to the main rollers.

[0058] The first camera 41 and the second camera 42 have the functions of autofocus and magnification of 10-500 times, and the images they capture are displayed on the display screen 6 in real time; the images captured by the first camera 41 and the second camera 42 are displayed on the display screen 6 in real time through data transmission cable 5 or wireless transmission.

[0059] The display screen 6 has a corresponding image display area for each camera. By adjustment, the left alignment mark 10 can be aligned with the free end slot of the steel wire 9 before the wire is pulled, and the right alignment mark 11 can be aligned with the target slot of the wire. The distance between the left alignment mark 10 and the right alignment mark 11 can be displayed on the display screen 6 in real time.

[0060] The working process of this embodiment is as follows:

[0061] Step (1): The steel wire 9 is routed in a conventional manner to form an initial wire mesh 7 of a certain width;

[0062] Step (2): Position the wire cutting mesh wiring auxiliary device based on vision assistance on the wall of the cutting machine table, and confirm the clarity of the steel wire 9 and the empty groove in screen A and screen B of display screen 6, and adjust the distance between the left alignment mark 10 and the right alignment mark 11 on the screen to the width of a wire hole.

[0063] Step (3): When the trace is about one silicon block width wide, stop the guide wheel routing;

[0064] Step (4): Move the first camera 41 and the second camera 42 left and right to align the left alignment mark 10 on screen A with the slot where the free end of the steel wire 9 is located on screen B, such as... Figure 2 As shown before the middle a-axis dial;

[0065] Step (5): While slowly rotating the main rollers 21 and 22, pinch the wire-pulling fixing device 12 with your fingers and pull the wire mesh 7 outward so that the free end of the steel wire 9 moves to the position aligned with the right alignment mark 11. Figure 2 As shown in states 2 and 3 in section b, and as... Figure 2 As shown in state 4;

[0066] Step (6): Determine whether the free end of the steel wire 9 coincides with the right alignment mark 11. If they coincide, complete one precise wire mesh 7 operation. Repeat steps (3) to (5) to achieve the precise wire mesh 7 operation. Finally, the steel wires are aligned in all places on screen A and screen B. Example 3

[0067] like Figure 3 , Figure 4 For the three-main-roll process, one more camera and one screen C need to be added, that is, it has three cameras and three corresponding display areas;

[0068] A vision-assisted wire cutting method for mesh routing includes the following steps:

[0069] Step (1): The steel wire 9 is routed in a conventional manner to form an initial wire mesh 7 of a certain width;

[0070] Step (2): Position the vision-assisted wire cutting mesh wiring auxiliary device on the wall of the wire cutting machine, and adjust the distance between the left alignment mark 10 and the right alignment mark 11 on the screen to the width of one wire hole.

[0071] Step (3): When the trace is about one silicon block width wide, stop the guide wheel routing;

[0072] Step (4): Move the steel wire at the second camera 42 using the wire fixing device 12;

[0073] Step (5): Move the steel wire at point 41 of the first camera;

[0074] Step (6): Move the steel wire at the third camera 43 to determine whether the free end of the steel wire 9 coincides with the right alignment mark 11. If they coincide, a precise wire-pulling operation 7 is completed. Finally, the steel wires in screens A, B and C are aligned.

[0075] like Figure 4 The initial state is as follows Figure 4 As shown in state 1, first, the steel wire at the second camera 42 is moved using the wire-fixing device 12, and then the steel wire at the first camera 41 is moved, as follows. Figure 4 As shown in states 2 and 3;

[0076] Finally, the 43 steel wires of the third camera were adjusted, such as... Figure 4 As shown in state 6, determine whether the free end of steel wire 9 coincides with the right alignment mark 11. If they coincide, complete one precise wire mesh 7 operation. Finally, the steel wires are aligned in all places on screens A, B and C.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the present invention without departing from its novel spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for wire cutting and routing a mesh based on vision assistance, characterized in that... Includes the following steps: Step (1): The steel wire (9) is routed in a conventional manner to form an initial wire mesh (7) of a certain width. Step (2): Position the wire cutting mesh wiring auxiliary device based on vision assistance on the wall of the cutting machine table, and adjust the distance between the left alignment mark (10) and the right alignment mark (11) on the screen to the width of a wire hole; Step (3): When the trace is one silicon block width, stop the guide wheel routing; Step (4): Move the first camera (41) and the second camera (42) left and right to align the left alignment mark (10) on screen A and screen B with the slot where the free end of the steel wire (9) is located; Step (5): While slowly rotating the first main roller (21) and the second main roller (22), pinch the wire fixing device (12) with your fingers and pull the wire mesh (7) outward so that the free end of the steel wire (9) moves to the position aligned with the right alignment mark (11) in screen B. Then rotate the first main roller (21) and the second main roller (22) in the opposite direction and pinch the wire fixing device (12) with your fingers to pull the wire mesh (7) outward so that the free end of the steel wire (9) moves to the position aligned with the right alignment mark (11) in screen A. Step (6): Determine whether the free end of the steel wire (9) coincides with the right alignment mark (11) in both screen A and screen B. If they coincide, a precise wire mesh (7) operation is completed. Step (2) also includes a step of confirming the clarity of the steel wires (9) and the empty slots in screens A and B of the display screen (6).

2. A vision-assisted wire cutting mesh routing auxiliary device, which employs the vision-assisted wire cutting mesh routing method according to claim 1, characterized in that... It includes a positioning bracket guide rail assembly (1), a connecting rod (3), a first camera (41), a second camera (42), and a display screen (6); The connecting rod (3) is used to fix the first camera (41) and the second camera (42) on the positioning bracket guide rail assembly (1); The positioning bracket guide rail assembly (1) is used to accurately position the entire device. The guide rail of the positioning bracket guide rail assembly (1) is parallel to the first main roller (21), and the first camera (41) and the second camera (42) on it can slide along a direction parallel to the main roller. The first camera (41) and the second camera (42) have the functions of autofocus and magnification of 10 to 500 times, and the images they capture are displayed on the display screen (6) in real time; The display screen (6) has a corresponding image display area for each camera. By adjusting it, the left alignment mark (10) can be aligned with the free end slot of the steel wire (9) before the wire is pulled, and the right alignment mark (11) can be aligned with the target slot of the wire. The distance between the left alignment mark (10) and the right alignment mark (11) can be displayed on the display screen (6) in real time.

3. The vision-assisted wire cutting mesh wiring auxiliary device according to claim 2, characterized in that... The connecting rod (3) is also equipped with a third camera (43).

4. A vision-assisted wire cutting method for mesh routing, comprising using the vision-assisted wire cutting mesh routing auxiliary device according to claim 3, characterized in that... Includes the following steps: Step (1): In the three-roller cutting mechanism, the steel wire (9) is conventionally routed to form an initial wire mesh (7) of a certain width. Step (2): Position the wire cutting mesh wiring auxiliary device based on vision assistance on the wall of the cutting machine table, and adjust the distance between the left alignment mark (10) and the right alignment mark (11) on the screen to the width of a wire hole; Step (3): When the trace is one silicon block width, stop the guide wheel routing; Step (4): Move the steel wire at the second camera (42) using the wire fixing device (12); Step (5): Move the steel wire at the first camera (41); Step (6): Move the steel wire at the third camera (43) and determine whether the free end of the steel wire (9) coincides with the right alignment mark (11). If they coincide, a precise wire mesh (7) operation is completed. Finally, the steel wires in screens A, B and C are aligned.

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