Laser cutting assembly and photovoltaic series welding machine with same

Abstract

The utility model discloses a laser cutting assembly and a photovoltaic series welding machine with the laser cutting assembly, and the laser cutting assembly comprises a conveying line for conveying battery pieces along a first direction; the laser cutting unit comprises a cutting platform capable of doing linear reciprocating motion in the first direction; the first limiting unit comprises a pair of first clamping arms which can be close to or far away from each other in the direction perpendicular to the first direction; the second limiting unit comprises a pair of second clamping arms and a second driving part for driving the pair of second clamping arms to be close to or far away from each other in the direction perpendicular to the first direction; the limiting precision of the second limiting unit is higher than that of the first limiting unit, and the second limiting unit is located on the downstream of the first limiting unit. The camera is arranged right above the second limiting unit; the transverse moving unit is used for carrying the battery pieces at the second limiting unit to the cutting platform; and the control unit is in communication connection with the camera, the second driving part and the laser cutting unit.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic cell production equipment, and specifically relates to a laser cutting component and a photovoltaic string welding machine having the same. Background Art

[0002] In the production process of photovoltaic cells, the cells need to be laser cut to achieve the scribing and grooving of the cells. Before laser cutting, the handling assembly will transport the cells from the conveyor line to the laser cutting table. During the above handling process, the position of the cells is changed from the original conveyor line to the laser cutting table, which is prone to position errors. The laser cutting assembly in the prior art cannot eliminate or reduce the above errors, thereby affecting the processing accuracy of laser cutting. Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to provide a laser cutting component capable of reducing position errors and a photovoltaic string welding machine having the same.

[0004] In order to solve the above technical problems, the utility model provides a laser cutting assembly, comprising: a conveyor line, conveying a battery cell along a first direction; a laser cutting unit, comprising a cutting platform capable of linear reciprocating motion along the first direction; a first limiting unit, comprising a pair of first clamping arms capable of approaching or moving away from each other in a direction perpendicular to the first direction, and a pair of the first clamping arms are symmetrically distributed on both sides of the conveyor line; a second limiting unit, comprising a pair of second clamping arms and a second driving unit driving the pair of second clamping arms to approach or move away from each other in a direction perpendicular to the first direction, and a pair of the second clamping arms are symmetrically distributed on both sides of the conveyor line; the first limiting unit and the second limiting unit are configured to limit the position of the battery cell on the conveyor line; the limiting accuracy of the second limiting unit is higher than the limiting accuracy of the first limiting unit, and is located downstream of the first limiting unit; a camera, arranged directly above the second limiting unit, for collecting position image information of the battery cell at the second limiting unit; a lateral movement unit, for transporting the battery cell at the second limiting unit to the cutting platform; a control unit, communicatingly connected with the camera, the second driving unit, and the laser cutting unit.

[0005] Preferably, the laser cutting unit also includes a platform driving unit and a laser unit arranged above the cutting platform, wherein the platform driving unit is connected to the cutting platform to drive the cutting platform to make linear reciprocating motion along the first direction, and the control unit is communicatively connected to the platform driving unit to control the movement of the cutting platform.

[0006] Preferably, the laser unit comprises a carrier, at least one laser disposed on the carrier, and a nozzle disposed on the carrier;

[0007] The nozzles are distributed obliquely downward, and a liquid receiving tray extending along the first direction is provided on the top of the platform driving part, and the liquid receiving tray is located below the cutting platform.

[0008] Preferably, the top bearing surface of the cutting platform is recessed downward to form a groove, and the groove extends along the length direction or the width direction of the cutting platform, wherein a plurality of first negative pressure suction holes are provided on the top bearing surface of the cutting platform.

[0009] Preferably, the second driving part comprises a servo motor and a belt transmission module, and the pair of second clamping arms are connected to the belt transmission module;

[0010] The second clamping arm has a plurality of second rollers spaced apart along the first direction, and the rotation axes of the second rollers are distributed along the up-down direction.

[0011] Preferably, the second clamping arm comprises a first block connected to the belt transmission module, a second block connected to the first block, a third block connected to the second block, an arm connected to the third block and located above the third block, and the second roller rotatably disposed on the arm;

[0012] Wherein, a first fine-tuning structure is provided between the first block and the second block, and the first fine-tuning structure is configured to adjust the position of the second block in a direction perpendicular to the first direction;

[0013] A second fine-tuning structure is disposed between the second block and the third block, and the second fine-tuning structure is configured to adjust the position of the third block in the first direction.

[0014] Preferably, the second roller is arranged on the arm body through a connecting block, and the second roller is arranged in a one-to-one correspondence with the connecting block, wherein the second roller is rotatably provided on the cantilever end of the connecting block, and a limiting groove extending in a direction perpendicular to the first direction is provided on the arm body, and part of the connecting block is located in the limiting groove.

[0015] Preferably, the conveyor line comprises a conveyor frame, a vacuum adsorption platform arranged on the top of the conveyor frame, a driving roller and a driven roller arranged on the conveyor frame, and a conveyor belt sleeved on the driving roller and the driven roller;

[0016] There are multiple vacuum adsorption platforms, and the multiple vacuum adsorption platforms are located in the space formed by the active roller, the driven roller and the conveyor belt, and the multiple vacuum adsorption platforms are adjacently distributed in the first direction; a plurality of second negative pressure suction holes are provided on the top surface of the vacuum adsorption platform, and a plurality of through holes are provided on the conveyor belt, and the plurality of through holes are distributed at intervals along the first direction; wherein the vacuum adsorption platform located at the second limiting unit is widened in a direction perpendicular to the first direction, and a backlight source is provided at the widened area.

[0017] Preferably, the conveying frame includes a main frame and a movable part, the driven roller is arranged on the movable part, and the active roller and the plurality of vacuum adsorption platforms are arranged on the main frame;

[0018] The movable part is arranged on the main frame through a first connection structure, and the first connection structure is configured to enable the movable part to adjust its position in the first direction.

[0019] The utility model also provides a photovoltaic string welding machine, comprising the laser cutting assembly as described above.

[0020] The technical solution provided by the utility model has the following advantages:

[0021] The control unit is in communication connection with the second driving unit, the camera takes real-time photos of the position of the battery cell at the second limiting unit, and the control unit drives the second driving unit to move according to the position image information of the battery cell, thereby adjusting the position of the battery cell on the conveyor line. The control unit can also drive the cutting platform to move to a preset material receiving position according to the position image information of the battery cell at the second limiting unit taken by the camera, and then control the lateral movement unit to move the battery cell at the second limiting unit to the cutting platform at the above-mentioned material receiving position, thereby reducing or eliminating the position error of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of the laser cutting assembly provided by the utility model;

[0024] Figure 2 It is a schematic diagram of the positional relationship between the conveyor line, the first limiting unit and the second limiting unit;

[0025] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the A area in the middle;

[0026] Figure 4 The schematic diagram of the decomposed structure of the conveyor line is shown below;

[0027] Figure 5 It is a structural schematic diagram of the vacuum adsorption platform;

[0028] Figure 6 is a schematic structural diagram of a second limiting unit;

[0029] Figure 7 is a schematic diagram of the decomposed structure of the second limiting unit;

[0030] Figure 8 for Figure 7 Schematic diagram of the decomposed structure of area B in the middle;

[0031] Fig. 9 is a schematic diagram of the decomposed structure between the second block and the third block;

[0032] Fig.10 It is a schematic diagram of the structure of the laser cutting unit at a first viewing angle;

[0033] Fig.11 It is a schematic diagram of the structure of the laser cutting unit at a second viewing angle. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0036] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0037] Embodiment 1

[0038] like Figure 1As shown, the utility model provides a laser cutting assembly for realizing automatic conveying and cutting of a battery sheet 700. The laser cutting assembly includes a conveyor line 100, a laser cutting unit 200, a first position limiting unit 400, a second position limiting unit 500, a camera 600, a lateral movement unit 300 and a control unit (not shown).

[0039] The conveyor line 100 is used to convey the battery cell 700 in a first direction, and the first direction is the conveying direction of the conveyor line 100. The first limiting unit 400 and the second limiting unit 500 are distributed along the first direction and are used to limit the position of the battery cell 700 on the conveyor line 100. The limiting accuracy of the second limiting unit 500 is higher than that of the first limiting unit 400, and the second limiting unit 500 is located downstream of the first limiting unit 400.

[0040] The camera 600 is arranged directly above the second limiting unit 500, and is used to collect the position image information of the battery cell 700 at the second limiting unit 500. The laser cutting unit 200 is used to cut the battery cell 700, and the laser cutting unit 200 includes a cutting platform 210 capable of linear reciprocating motion along a first direction. The transverse movement unit 300 includes a linear module and a suction cup assembly, and the suction cup assembly is connected to the linear module, and the linear module is used to provide linear reciprocating motion perpendicular to the first direction. The transverse movement unit 300 is used to move the battery cell 700 at the second limiting unit 500 to the cutting platform 210. The control unit is communicatively connected with the camera 600, the second limiting unit 500, and the laser cutting unit 200, so as to realize real-time adjustment of the position of the battery cell 700 and eliminate or reduce the position error of the battery cell 700.

[0041] like Figure 2 and Figure 4 As shown, the conveyor line 100 includes a conveyor frame 110, a vacuum adsorption platform 120 disposed on the top of the conveyor frame 110, an active roller 130 and a driven roller 140 disposed on the conveyor frame 110, and a conveyor belt 150 sleeved on the active roller 130 and the driven roller 140. The active roller 130 and the driven roller 140 are arranged at the same height. When the active roller 130 rotates, the active roller 130 drives the conveyor belt 150 and the driven roller 140 to rotate. A crushed material box 180 is also provided downstream of the active roller 130, and the crushed material box 180 is located below the active roller 130.

[0042] There are multiple vacuum adsorption platforms 120, and the multiple vacuum adsorption platforms 120 are located in the space surrounded by the active roller 130, the driven roller 140 and the conveyor belt 150, and the multiple vacuum adsorption platforms 120 are adjacently distributed in the first direction. Figure 4 and Figure 5As shown, a plurality of second negative pressure suction holes 121 are provided on the top surface of the vacuum adsorption platform 120, and a plurality of through holes 151 are provided on the conveyor belt 150, and the plurality of through holes 151 are distributed at intervals along the first direction. The top surface of the vacuum adsorption platform 120 is in contact with the conveyor belt 150, and the vacuum adsorption platform 120 can support the conveyor belt 150 from the bottom. During the transportation of the battery cell 700 on the conveyor line 100, the negative pressure suction force generated by the vacuum adsorption platform 120 acts on the battery cell 700 through the through holes 151, so that the battery cell 700 is adsorbed on the conveyor belt 150 and moves along the first direction with the conveyor belt 150.

[0043] Continue reading Figure 5 As shown, the vacuum adsorption platform 120 located at the second limiting unit 500 is widened in a direction perpendicular to the first direction, and a backlight source is provided in the widened area 122 , and the backlight source is used to provide light for the camera 600 .

[0044] Furthermore, if Figure 4 As shown, the conveying frame 110 includes a main frame 111 and a movable portion 112, a driven roller 140 is arranged on the movable portion 112, and an active roller 130 and a plurality of vacuum adsorption platforms 120 are arranged on the main frame 111. The movable portion 112 is arranged on the main frame 111 through a first connection structure, and the first connection structure is used to enable the movable portion 112 to adjust its position in a first direction. The purpose of adjusting the position of the driven roller 140 is to tighten the conveyor belt 150 to ensure the reliability of the transportation of the battery cell 700.

[0045] The first connection structure includes a first linear slide 160 fixed on the main frame 111 and distributed along the first direction, a first slider 161 slidably mounted on the first linear slide 160, and a first cylinder 170 mounted on the main frame 111 and connected to the movable part 112. Among them, the cylinder body of the first cylinder 170 is fixed on the main frame 111, and the piston rod of the first cylinder 170 is connected to the movable part 112. The first cylinder 170 can drive the driven roller 140 to perform linear reciprocating motion along the first direction. The first slider 161 is fixed on the movable part 112, and the first slider 161 and the first linear slide 160 play a role in guiding the movement. When the conveyor belt 150 is relaxed, the first cylinder 170 drives the movable part 112 to move in a direction away from the active roller 130, thereby achieving the tensioning of the conveyor belt 150.

[0046] like Figure 3As shown, the first position-limiting unit 400 includes a pair of first clamping arms 410 that can move closer to or farther from each other in a direction perpendicular to the first direction, and the pair of first clamping arms 410 are symmetrically distributed on both sides of the conveyor line 100. The first position-limiting unit 400 also includes a pair of first driving parts 420, and the first driving parts 420 are arranged in a one-to-one correspondence with the first clamping arms 410. In other words, a first driving part 420 and a first clamping arm 410 are respectively arranged on both sides of the conveying direction of the conveyor line 100.

[0047] In one embodiment, the first driving part 420 is a cylinder, the first clamping arm 410 is connected to the piston rod of the cylinder, and a plurality of first rollers 430 spaced apart in the first direction are provided on the first clamping arm 410. The first rollers 430 are rotatably provided on the first clamping arm 410, and the rotation axes of the first rollers 430 are distributed along the upper and lower directions.

[0048] like Figure 6 As shown, the second position limiting unit 500 includes a pair of second clamping arms 510 and a second driving part 520 for driving the pair of second clamping arms 510 to move closer to or farther from each other in a direction perpendicular to the first direction, and the pair of second clamping arms 510 are symmetrically distributed on both sides of the conveyor line 100. The above-mentioned "both sides of the conveyor line 100" also refers to both sides of the conveying direction of the conveyor line 100. It is worth noting that the second driving part 520 can realize the driving of the pair of second clamping arms 510.

[0049] The control unit is in communication connection with the second driving unit 520, the camera 600 takes real-time photos of the position of the battery cell 700 at the second limiting unit 500, and the control unit drives the second driving unit 520 to move according to the position image information of the battery cell 700, thereby adjusting the position of the battery cell 700 on the conveyor line 100. The control unit can also drive the cutting platform 210 to move to a preset material receiving position according to the position image information of the battery cell 700 at the second limiting unit 500 taken by the camera 600, and then control the lateral movement unit 300 to move the battery cell 700 at the second limiting unit 500 to the cutting platform 210 at the above-mentioned material receiving position, thereby eliminating or reducing the position error of the battery cell 700.

[0050] like Figure 6 and Figure 7 As shown, the second driving part 520 includes a servo motor 521 and a belt transmission module 522, and a pair of second clamping arms 510 are connected to the belt transmission module 522. The belt transmission module 522 is a prior art, including a transmission belt and a pulley, which will not be described in detail here.

[0051] The second clamping arm 510 includes a first block 511 connected to the transmission belt of the belt transmission module 522, a second block 512 connected to the first block 511, a third block 513 connected to the second block 512, an arm 514 connected to and located above the third block 513, and a second roller 516 rotatably arranged on the arm 514, wherein the second roller 516 is spaced apart along the first direction, and its rotation axis is distributed along the up-down direction. During adjustment, the servo motor 521 makes the pair of second clamping arms 510 approach or move away from each other through the belt transmission module 522, thereby adjusting the position of the battery cell 700 on the conveyor belt 150.

[0052] Furthermore, if Figure 7 As shown, a first fine-tuning structure is provided between the first block 511 and the second block 512, and the first fine-tuning structure is used to adjust the position of the second block 512 in a direction perpendicular to the first direction. Specifically, the first fine-tuning structure includes a first adjustment groove 5121 provided on the second block 512, a first bolt (not shown) located in the first adjustment groove 5121, an adjustment bolt 517 fixedly connected to the second block 512, and an adjustment nut 518 provided on the adjustment bolt 517. Among them, the first adjustment groove 5121 extends in a direction perpendicular to the first direction, and the first block 511 is provided with a plurality of first holes 5111 matched with the first bolt. A spacer 519 is also fixedly provided on the first block 511, and the spacer 519 is vertically distributed with the first block 511. The spacer 519 is provided with a second hole (not shown) matched with the adjustment bolt 517, and the adjustment bolt 517 is distributed in a direction perpendicular to the first direction.

[0053] When it is necessary to fine-tune the position of the second block 512 in a direction perpendicular to the first direction, after loosening the first bolt and the adjusting nut 518, the second block 512 is adjusted to a preset position, and then the first bolt and the adjusting nut 518 are tightened, and the adjusting nut 518 abuts against the spacer 519. Different from the large-distance adjustment of the second driving part 520 in a direction perpendicular to the first direction, the first fine-tuning structure can achieve fine-tuning of the position of the arm 514 in a direction perpendicular to the first direction, thereby improving the precision of the position adjustment.

[0054] Furthermore, if Fig. 9 As shown, a second fine-tuning structure is provided between the second block 512 and the third block 513, and the second fine-tuning structure is used to adjust the position of the third block 513 in the first direction. The second fine-tuning structure includes a second adjustment groove 5122 provided on the second block 512, a second bolt (not shown) provided in the second adjustment groove 5122, and a plurality of third holes provided on the bottom end surface of the third block 513 for cooperating with the second bolt, wherein the second adjustment groove 5122 extends along the first direction, and the plurality of third holes are spaced apart in the first direction.

[0055] In order to ensure the installation accuracy of the second clamping arm 510, Figure 8 As shown, the second roller 516 is arranged on the arm body 514 through the connecting block 515, and the second roller 516 is arranged one by one with the connecting block 515. Among them, the connecting block 515 is a cantilever structure, and the cantilever end of the connecting block 515 is rotatably provided with the second roller 516, and the arm body 514 is provided with a limiting groove 5141 extending perpendicular to the first direction, and part of the connecting block 515 is located in the limiting groove 5141. The limiting groove 5141 can limit the installation direction of the connecting block 515, thereby improving the installation accuracy of the second roller 516.

[0056] In order to ensure that the plurality of second rollers 516 on the plurality of connecting blocks 515 are approximately located on the extension line of the same straight line, as shown in FIG. Figure 8 As shown, the connecting block 515 is provided with a third adjustment slot 5151, the third adjustment slot 5151 extends in a direction perpendicular to the first direction, a third bolt (not shown) is provided in the third adjustment slot 5151, and a fourth hole 5142 matched with the third bolt is provided on the arm body 514. The fourth hole 5142 is located in the limiting slot 5141 and is arranged one-to-one with the limiting slot 5141. When adjusting, the third bolt is loosened, the connecting block 515 is moved to an appropriate position along the limiting slot 5141, and then the third bolt is tightened.

[0057] like Fig.10 and Fig.11 As shown, the laser cutting unit 200 also includes a platform driving unit 220 connected to the cutting platform 210 and a laser unit 230 disposed above the cutting platform 210, wherein the platform driving unit 220 is drivingly connected to the cutting platform 210 to drive the cutting platform 210 to perform linear reciprocating motion along a first direction. The control unit is communicatively connected to the platform driving unit 220 to control the docking position of the cutting platform 210. The docking position of the cutting platform 210 includes the above-mentioned material receiving position located below the traverse unit 300 and the processing position located below the laser unit 230.

[0058] The laser unit 230 includes a carrier 231, at least one laser 232 disposed on the carrier 231, and a nozzle 233 disposed on the carrier 231. The nozzles 233 are distributed obliquely downward, and a liquid receiving tray 221 extending along a first direction is provided on the top of the platform driving unit 220. The liquid receiving tray 221 is located below the cutting platform 210 and is used to receive liquid. In one embodiment, the number of lasers 232 is set to two, one laser 232 is used for scribing, and the other laser 232 is used for grooving. The nozzle 233 is used to spray filtered pure water.

[0059] Furthermore, the top bearing surface of the cutting platform 210 is recessed downward to form a groove 211, and the groove 211 extends along the length direction or the width direction of the cutting platform 210. The groove 211 is used to reduce the contact area between the top bearing surface of the cutting platform 210 and the battery cell 700, thereby improving the stability of the placement of the battery cell 700 to a certain extent. Among them, a plurality of first negative pressure suction holes 212 are provided on the top bearing surface of the cutting platform 210. When the battery cell 700 is placed on the cutting platform 210, the negative pressure suction force at the first negative pressure suction hole 212 fixes the battery cell 700 on the cutting platform 210, which is beneficial to subsequent laser processing. It is worth noting that the first negative pressure suction hole 212 is not provided in the groove 211.

[0060] Embodiment 2

[0061] The utility model also provides a photovoltaic string welding machine (not shown), which includes the laser cutting assembly described in the first embodiment.

[0062] Obviously, the above described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the utility model.

Claims

1. A laser cutting assembly, characterized in that: include: A conveyor line (100) conveying battery cells (700) along a first direction; A laser cutting unit (200), comprising a cutting platform (210) capable of performing linear reciprocating motion along the first direction; A first limiting unit (400) comprises a pair of first clamping arms (410) capable of moving toward or away from each other in a direction perpendicular to the first direction, the pair of first clamping arms (410) being symmetrically distributed on both sides of the conveying line (100); a second limiting unit (500), comprising a pair of second clamping arms (510) and a second driving unit (520) for driving the pair of second clamping arms (510) to move closer to or farther from each other in a direction perpendicular to the first direction, the pair of second clamping arms (510) being symmetrically distributed on both sides of the conveyor line (100); the first limiting unit (400) and the second limiting unit (500) being configured to limit the position of the battery cell (700) on the conveyor line (100); the limiting accuracy of the second limiting unit (500) is higher than that of the first limiting unit (400), and the second limiting unit (500) is located downstream of the first limiting unit (400); a camera (600) disposed directly above the second limiting unit (500) and used for collecting position image information of the battery sheet (700) at the second limiting unit (500); A lateral movement unit (300) for moving the battery cell (700) at the second limiting unit (500) to the cutting platform (210); A control unit is communicatively connected to the camera (600), the second driving unit (520), and the laser cutting unit (200).

2. The laser cutting assembly according to claim 1, characterized in that The laser cutting unit (200) further comprises a platform driving unit (220) and a laser unit (230) arranged above the cutting platform (210), wherein the platform driving unit (220) is connected to the cutting platform (210) to drive the cutting platform (210) to perform linear reciprocating motion along the first direction, and the control unit is communicatively connected to the platform driving unit (220) to control the movement of the cutting platform (210).

3. The laser cutting assembly according to claim 2, characterized in that: The laser unit (230) comprises a carrier (231), at least one laser (232) disposed on the carrier (231), and a nozzle (233) disposed on the carrier (231); The nozzles (233) are distributed obliquely downwards, a liquid receiving tray (221) extending along the first direction is provided on the top of the platform driving part (220), and the liquid receiving tray (221) is located below the cutting platform (210).

4. The laser cutting assembly according to claim 1, characterized in that: The top bearing surface of the cutting platform (210) is recessed downward to form a groove (211), and the groove (211) extends along the length direction or the width direction of the cutting platform (210), wherein a plurality of first negative pressure suction holes (212) are provided on the top bearing surface of the cutting platform (210).

5. The laser cutting assembly according to claim 1, characterized in that: The second driving part (520) comprises a servo motor (521) and a belt transmission module (522), and the pair of second clamping arms (510) are connected to the belt transmission module (522); The second clamping arm (510) has a plurality of second rollers (516) distributed at intervals along the first direction, and the rotation axes of the second rollers (516) are distributed along the up-down direction.

6. The laser cutting assembly according to claim 5, characterized in that The second clamping arm (510) comprises a first block (511) connected to the belt transmission module (522), a second block (512) connected to the first block (511), a third block (513) connected to the second block (512), an arm (514) connected to the third block (513) and located above the third block (513), and the second roller (516) rotatably disposed on the arm (514); Wherein, a first fine-tuning structure is provided between the first block (511) and the second block (512), and the first fine-tuning structure is configured to adjust the position of the second block (512) in a direction perpendicular to the first direction; A second fine-tuning structure is provided between the second block (512) and the third block (513), and the second fine-tuning structure is configured to adjust the position of the third block (513) in the first direction.

7. The laser cutting assembly according to claim 6, characterized in that The second roller (516) is arranged on the arm body (514) via a connecting block (515), and the second roller (516) and the connecting block (515) are arranged in a one-to-one correspondence, wherein the second roller (516) is rotatably arranged on the cantilever end of the connecting block (515), and a limiting groove (5141) extending in a direction perpendicular to the first direction is provided on the arm body (514), and a part of the connecting block (515) is located in the limiting groove (5141).

8. The laser cutting assembly according to claim 1, characterized in that: The conveyor line (100) comprises a conveyor frame (110), a vacuum adsorption platform (120) arranged on the top of the conveyor frame (110), a driving roller (130) and a driven roller (140) arranged on the conveyor frame (110), and a conveyor belt (150) sleeved on the driving roller (130) and the driven roller (140); A plurality of the vacuum adsorption platforms (120) are provided, and the plurality of the vacuum adsorption platforms (120) are located in a space formed by the active roller (130), the driven roller (140) and the conveyor belt (150), and the plurality of the vacuum adsorption platforms (120) are adjacently distributed in the first direction; a plurality of second negative pressure suction holes (121) are provided on the top surface of the vacuum adsorption platform (120), and a plurality of through holes (151) are provided on the conveyor belt (150), and the plurality of through holes (151) are spaced apart and distributed along the first direction; The vacuum adsorption platform (120) located at the second limiting unit (500) is widened in a direction perpendicular to the first direction, and a backlight source is provided at the widened area (122).

9. The laser cutting assembly according to claim 8, characterized in that The conveying frame (110) comprises a main frame (111) and a movable part (112), the driven roller (140) is arranged on the movable part (112), and the active roller (130) and the plurality of vacuum adsorption platforms (120) are arranged on the main frame (111); The movable part (112) is arranged on the main frame (111) via a first connection structure, and the first connection structure is configured to enable the movable part (112) to adjust its position in the first direction.

10. A photovoltaic string welding machine, characterized in that: Comprising a laser cutting assembly as claimed in any one of claims 1 to 9.

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