CN112404755B

CN112404755B - Laser drilling method for photovoltaic glass

Info

Publication number: CN112404755B
Application number: CN202011005417.9A
Authority: CN
Inventors: 陈广广; 卢巍
Original assignee: Zhejiang Holy Laser Technology Co ltd
Current assignee: Zhejiang Holy Laser Technology Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2023-10-03
Anticipated expiration: 2040-09-23
Also published as: CN112404755A

Abstract

The invention discloses a photovoltaic glass laser drilling method, which comprises the steps of acquiring the position of a glass plate to be drilled through presetting a standard position and capturing images of the glass plate to be drilled downwards through three CCD sensors, comparing the position with the preset standard position, further obtaining the actual drilling circle center on the glass plate to be drilled, and completing compensation according to deflection of a lens in a vibrating mirror assembly according to the actual drilling circle center and drilling on the glass plate around the actual drilling circle center. By the method, even if the glass plate deflects in the conveying process, the accurate punching of the glass plate can be realized.

Description

Laser drilling method for photovoltaic glass

Technical Field

The invention relates to the field of photovoltaic glass processing equipment, in particular to a photovoltaic glass laser drilling method.

Background

In real life, the glass is increasingly widely applied, in particular to the fields of photovoltaic solar glass, automobile glass, building engineering glass and the like. And different requirements are provided for different application scenes and glass. Such as photovoltaic glass, which also requires lines of vias to be punched in rows on its surface during installation to facilitate routing of the bus bars, etc.

The existing photovoltaic glass drilling holes are usually drilled mechanically, the mechanical glass drilling machine is similar to the existing vertical drilling machine, a motor is used for driving a drill spindle through a belt, and diamond is used for drilling holes at a high speed. However, mechanical drilling has the problems that the diamond drill bit is easy to wear and the yield of mechanical drilling is low.

The problem of mechanical drilling can be avoided by adopting laser drilling, and the laser drilling is the laser processing technology which reaches practical realization at the earliest and is one of the main application fields of laser processing. The method uses high-power density laser beam to irradiate the processed material, so that the material is quickly heated to vaporization temperature and evaporated to form holes.

But the mode that adopts the conveyer belt to carry in the glass board material loading in-process usually accomplishes the material loading of glass board, and because the face of glass board is too big, need many conveyer belts to carry the glass board side by side, and there is certain difference in the frictional force size between every conveyer belt and the glass board, can cause the glass board to take place to deflect at the in-process of carrying, leads to the position of laser drilling to take place the dislocation.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a photovoltaic glass laser drilling method which is characterized in that a position of glass to be drilled is taken by a CCD sensor and is compared with a preset standard position, and compensation drilling is carried out by a galvanometer assembly.

The technical problems are solved, and the invention adopts the following technical scheme:

a method for laser drilling glass, comprising the steps of:

s1, presetting a standard position, wherein the standard position is the position of a glass plate which is correctly placed on a supporting table, a coordinate system OXY is established by selecting a pair of right-angle sides of the glass plate which is correctly placed, the side edge of the glass plate falling on an X axis is a first standard side edge, the extending direction of the first standard side edge is perpendicular to the conveying direction of the glass plate, the side edge of the glass plate falling on a Y axis is a second standard side edge, and the extending direction of the second standard side edge is the same as the conveying direction of the glass plate; and select the point A1 (X1, 0) and A2 (X2, 0) on X axis, select the point A3 (0, Y1) on Y axis, and set up CCD sensor above A1 (X1, 0), A2 (X2, 0) and A3 (0, Y1) separately, the projection of the centre of three CCD sensors on the glass board coincides with A1 (X1, 0), A2 (X2, 0) and A3 (0, Y1) separately; selecting a preset punching circle center (X5, Y5) on a correctly placed glass plate, wherein a vibrating mirror assembly is arranged above the preset punching circle center, and a light beam of the vibrating mirror assembly can circle and punch around the preset punching circle center (X5, Y5);

s2, conveying the glass plate to be punched to a punching position on a supporting table, so that the glass plate to be punched is positioned below the vibrating mirror assembly and the CCD sensor;

s3, a) taking images of the glass plate to be punched downwards by the three CCD sensors, obtaining the position of the glass plate to be punched, comparing the position with a preset standard position, and obtaining the horizontal distance between the center of the corresponding CCD sensor and the side edge of the glass plate below the corresponding CCD sensor, and obtaining Y2, Y3 and X3 respectively; the side edge of the glass plate to be punched close to the X axis is a first measuring side edge, the side edge of the glass plate to be punched close to the Y axis is a second measuring side edge, Y2 is the horizontal distance from A1 to the first measuring side edge, Y3 is the horizontal distance from A2 to the first measuring side edge, and X3 is the horizontal distance from A3 to the second measuring side edge; to obtain the point A1' (X1, Y2), A2' (X2, Y3), A3' (X3, Y1); if Y2, Y3 and X3 are all 0, the light beam of the galvanometer component is round and perforated around the preset perforating circle center (X5, Y5);

b) Establishing an equation of a straight line where a first measuring side edge of the glass plate to be perforated is located:

establishing an equation of a straight line where a second measuring side edge of the glass plate to be perforated is located:

c) Solving an intersection point A4 (X4, Y4) of the first measuring side edge and the second measuring side edge on the glass plate to be perforated according to the equation of the straight line of the first measuring side edge and the equation of the straight line of the second measuring side edge, wherein the equation set of the intersection point coordinates is as follows:

d) Establishing a deflection angle of a first measuring side of a glass sheet to be perforated relative to a first standard sideEquation of θ:

d) Establishing an equation of an actual punching circle center (X6, Y6): combining the preset punching circle centers (X5, Y5) to obtain the azimuth angle theta' of the A4 (X4, Y4) and the actual punching circle centers (X6, Y6) to obtain

When k >0, and 90 ° - θ' > θ

X6=x4+lcos θ'

Y6=y4+lsinθ "; where θ "=θ+θ';

when k >0, and 90 ° - θ' < θ

X6=x4-lcosθ "then"

Y6=y4+lsinθ "; wherein θ "=180 ° - θ - θ';

when k is less than 0 and θ' >180 ° - θ

X6=x4+lcos θ'

Y6=y4+lsinθ "; wherein θ "=θ+θ' -180 °;

when k is less than 0 and θ' < 180 ° - θ

X6=x4+lcos θ'

Y6=y4-lsinθ "; wherein θ "=180 ° - θ - θ';

and is also provided with

S4, the vibrating mirror assembly completes compensation on the deflection of the inner lens according to the actual punching circle center (X6, Y6) and punches holes on the glass plate around the actual punching circle center (X6, Y6);

s5, conveying and blanking the punched glass plate;

s6, repeating the steps S2-S5 to realize batch punching of the glass plates.

In a further scheme, before the vibrating mirror assembly punches, the vibrating mirror assembly measures the vertical distance between the vibrating mirror assembly and the glass plate surface according to the distance meter and compensates the distance.

Advantageous effects

1. The glass plate to be punched is compared with a preset standard position through the CCD sensor, and punching is performed through automatic compensation of the vibrating mirror assembly, so that accurate punching can be realized even if the glass plate deflects in the conveying process.

2. The CCD sensor and the vibrating mirror assembly can move, so that the device is suitable for punching glass plates with different specifications and sizes.

3. The height difference between the vibrating mirror assembly and the glass plate surface is determined through the range finder, so that laser emitted by the vibrating mirror assembly always falls onto the plate surface of the glass plate.

Drawings

FIG. 1 is an isometric view of a glass perforating device;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is a front view of a glass perforating device;

FIG. 5 is an enlarged view of portion C of FIG. 4;

FIG. 6 is a top view of the glass perforating device;

FIG. 7 is a schematic perspective view of a glass perforating device at another view angle;

FIG. 8 is an enlarged view of portion D of FIG. 7;

FIG. 9 is a side view of a glass perforating device;

FIG. 10 is a schematic diagram of a preset standard position;

FIG. 11 is a schematic diagram of the coordinates of A4 on the glass to be perforated;

FIG. 12 is a schematic diagram showing the first measured side slope greater than 0 for the actual center coordinates of the hole;

FIG. 13 is a schematic view of a projection of a midpoint of one of the CCD sensors with a first measurement side;

FIG. 14 is a schematic view of a partial structure of the dust collection assembly;

FIG. 15 is a schematic diagram showing the first measurement side slope less than 0 for the actual center coordinates of the hole;

FIG. 16 is another schematic diagram showing the first measured side slope less than 0 for the actual center coordinates of the hole;

FIG. 17 is another schematic diagram of a first measurement side slope greater than 0 for an actual center coordinate of a hole.

Reference numerals in the schematic drawings illustrate:

6-conveyor belt, 40-support table, 41-X-axis guide rail, 42-Y-axis guide rail, 43-Y-axis slider, 44-Y-axis drive motor, 45-fourth guide rail, 46-fourth slider, 47-fourth drive motor, 48-CCD sensor, 49-cross beam, 50-bracket, 51-first guide rail, 52-first drive motor, 54-galvanometer assembly, 55-laser mainframe, 56-galvanometer cutting head, 57-second guide rail, 58-second slider, 59-first connection plate, 60-fifth slider, 61-third connection plate, 62-stopper, 63-screw, 64-protrusion, 65-third guide rail, 66-third slider, 67-second connection plate, 68-guide post, 69-connection block, 70-dust collector, 71-dust box, 72-dust collecting hole, 73-seal cover, 74-guide pipe, 75-dust collecting guide rail, 76-dust collecting slider, 77-fixing plate, 78-support plate, 79-baffle, 80-recovery box, 81-guide plate, 82-guide groove, 84-guide groove, and 85-drive cylinder.

Detailed Description

For a further understanding of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings and detailed description.

In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Referring to fig. 10-13, the present embodiment provides a laser drilling method for photovoltaic glass, which includes the following steps:

s1, presetting a standard position, wherein the standard position is the position of a glass plate which is correctly placed on a supporting table, and as shown in FIG. 10, selecting a pair of right-angle sides of the glass plate which is correctly placed to establish a coordinate system OXY, wherein the side edge of the glass plate falling on an X axis is a first standard side edge, the extending direction of the first standard side edge is perpendicular to the conveying direction of the glass plate, the side edge of the glass plate falling on a Y axis is a second standard side edge, and the extending direction of the second standard side edge is the same as the conveying direction of the glass plate; and select the point A1 (X1, 0) and A2 (X2, 0) on X axis, select the point A3 (0, Y1) on Y axis, and set up CCD sensor above A1 (X1, 0), A2 (X2, 0) and A3 (0, Y1) separately, the projection of the centre of three CCD sensors on the glass board coincides with A1 (X1, 0), A2 (X2, 0) and A3 (0, Y1) separately; and a preset punching circle center (X5, Y5) is selected on the correctly placed glass plate, a vibrating mirror assembly is arranged above the preset punching circle center, and light beams of the vibrating mirror assembly can circle around the preset punching circle center (X5, Y5) for punching.

S2, conveying the glass plate to be punched to a punching position on the supporting table, so that the glass plate to be punched is positioned below the vibrating mirror assembly and the CCD sensor.

S3, a) taking images of the glass plate to be punched downwards by the three CCD sensors, obtaining the position of the glass plate to be punched, comparing the position with a preset standard position, and obtaining the horizontal distance between the center of the corresponding CCD sensor and the side edge of the glass plate below the corresponding CCD sensor, and obtaining Y2, Y3 and X3 respectively; the side edge of the glass plate to be punched close to the X axis is a first measuring side edge, the side edge of the glass plate to be punched close to the Y axis is a second measuring side edge, Y2 is the horizontal distance from A1 to the first measuring side edge, Y3 is the horizontal distance from A2 to the first measuring side edge, and X3 is the horizontal distance from A3 to the second measuring side edge; to obtain the point A1' (X1, Y2), A2' (X2, Y3), A3' (X3, Y1); if Y2, Y3 and X3 are all 0, the beam of the galvanometer assembly is marked with a circle around the preset circle center (X5, Y5) for punching.

b) Establishing an equation of a straight line where the first measuring side of the glass sheet to be perforated is located according to the formula y=kx+b:

and because the first measuring side edge is perpendicular to the second measuring side edge, the equation of the straight line where the second measuring side edge of the glass plate to be punched is positioned is established according to the principle of solving a point to a straight line perpendicular to the first measuring side edge:

d) An equation for the deflection angle θ of the first measured side of the glass sheet to be perforated relative to the first standard side is established as follows:

as shown in fig. 11 (solid lines in fig. 11-13 are glass plates to be perforated, and broken lines are glass plates placed correctly, i.e., preset standard positions), it is possible to obtain:then, the value of θ can be obtained from tan θ.

d) Presetting a punching circle center (X5, Y5) and an actual punching circle center (X6, Y6) according to theta, wherein the process is as follows:

the connection point A4 is connected with a preset punching center to obtain a right triangle, the length of the right triangle in the X axis direction is X5, and the length of the right triangle in the Y axis direction is Y5, thus obtaining the right triangleAnd->L is the linear distance between the point A4 and the preset punching center.

As shown in fig. 12, the azimuth θ″ between A4 (X4, Y4) and the actual center of hole (X6, Y6) is calculated according to the above value of k, and then the linear distances L between A4 (X4, Y4), A4 (X4, Y4) and the actual center of hole (X6, Y6) are calculated according to the azimuth θ″ to obtain the equation set:

as shown in FIG. 12, when k >0, and 90 ° - θ' > θ

X6=x4+lsin θ'

Y6=y4+lcos θ "; where θ "=θ+θ';

as shown in FIG. 17, when k >0, and 90 ° - θ' < θ

X6=x4-lcosθ "then"

Y6=y4+lsinθ "; wherein θ "=180 ° - θ - θ';

as shown in FIG. 15, when k <0, and θ' >180 ° - θ

X6=x4+lsin θ'

Y6=y4+lcos θ "; wherein θ "=θ+θ' -180 °;

as shown in FIG. 16, when k <0, and θ' < 180 ° - θ

x6=x4-Lsin θ'

Y6=y4+lcos θ "; wherein θ "=180 ° - θ - θ';

and is also provided with

Finally, the coordinate value of the actual punching circle center (X6, Y6) is obtained.

S4, the vibrating mirror assembly emits laser according to the actual punching circle center (X6, Y6), the distance meter beside the vibrating mirror assembly emits laser at the same time, the height difference between the vibrating mirror assembly and the glass plate surface is judged according to the reflected light beam, so that the laser emitted by the vibrating mirror assembly always falls on the glass plate surface, and then the vibrating mirror assembly punches holes on the glass plate around the actual punching circle center (X6, Y6) to complete punching actions.

S5, conveying and discharging the punched glass plate.

S6, repeating the steps S2-S5 to realize batch punching of the glass plates.

The laser drilling device according to the above method, as shown in fig. 1-9 and 14, comprises a supporting table 40, wherein the supporting table 40 is provided with a plurality of conveyor belts 6 for conveying glass plates, and in this embodiment, the plurality of conveyor belts 6 extend in the same direction and are arranged in a rectangular array to form a conveyor belt group.

Meanwhile, the support table 40 is further provided with an X-axis guide rail 41 and two Y-axis guide rails 42, the two Y-axis guide rails 42 are respectively arranged at two sides of the conveyor belt group, and the extending direction of the Y-axis guide rails 42 is the same as the conveying direction of the conveyor belt 6. The X-axis guide rails 41 are transversely arranged on the two Y-axis guide rails 42, specifically, the Y-axis guide rails 42 are provided with a Y-axis sliding block 43 and a Y-axis driving motor 44, the Y-axis driving motor 44 is connected with the Y-axis sliding block 43 to drive the Y-axis sliding block 43 to move on the Y-axis guide rails 42 along the length direction thereof, the X-axis guide rails 41 are positioned above the conveyor belt 6, the extending direction of the X-axis guide rails 41 is perpendicular to the conveying direction of the conveyor belt 6, and two ends of the X-axis guide rails 41 are respectively fixed on the Y-axis sliding blocks 43 on the two Y-axis guide rails 42, so that the X-axis guide rails 41 can move along the length direction of the Y-axis guide rails 42. As shown in fig. 7 and 8, two fourth guide rails 45 are further provided on the X-axis guide rail 41 in the longitudinal direction thereof, and a fourth slider 46 is slidably provided on the fourth guide rail 45, and the fourth slider 46 is driven by a fourth driving motor 47 on the fourth guide rail 45. And a CCD sensor 48 is connected to each of the fourth sliders 46 on the two fourth rails 45.

And the supporting table 40 is also provided with a cross beam 49, the cross beam 49 is transverse to the upper side of the conveyer belt 6, and the extending direction of the cross beam 49 is perpendicular to the conveying direction of the conveyer belt 6. Both ends of the cross beam 49 are fixedly connected to the upper end surface of the support 40 via brackets 50. The front end surface of the cross member 49 is provided with a first guide rail 51 (in this embodiment, the direction is the front-rear direction with respect to the conveying direction of the conveyor belt 6, and the width direction of the conveyor belt 6 is the left-right direction). The first guide rail 51 is provided with a first driving motor 52 and a first slider, the first driving motor 52 is connected with the first slider to drive the first slider to slide on the first guide rail 51, and the first slider is fixedly connected with a fixing plate 77 extending along the length direction of the conveying belt 6. The fixed plate 77 is also provided with a CCD sensor 48.

The beam 49 is further provided with a plurality of galvanometer assemblies 54, and the galvanometer assemblies 54 comprise a laser host 55 and a galvanometer cutting head 56. The galvanometer assembly 54 is slidable along the length of the beam 49. Specifically, as shown in fig. 2, a second guide rail 57 is further provided on the front end surface of the cross beam 49, a second slider 58 is provided on the second guide rail 57, and a first connecting plate 59 is provided on the second slider 58. And a fifth sliding rail is arranged on the first connecting plate 59 along the vertical direction, and a fifth sliding block 60 is slidably arranged on the fifth sliding rail. The fifth slider 60 is provided with a third connecting plate 61, and the vibrating mirror cutting head 56 is fixedly connected with the third connecting plate 61. The first connecting plate 59 is provided with a stopper 62, and the stopper 62 is penetrated by a screw 63 along the vertical direction, and the screw 63 is in threaded connection with the stopper 62. The side wall of the third connecting plate 61 is provided with a projection 64 along the length direction of the cross beam 49, and the screw head of the screw 63 abuts against the projection 64. The third connecting plate 61 is lifted by the knob screw 63, so that the vibrating mirror cutting head 56 is driven to move along the vertical direction so as to be suitable for glass plates with different thicknesses. Meanwhile, a third guide rail 65 is arranged on the upper end face of the cross beam 49 along the length direction of the cross beam, a third sliding block 66 is arranged on the third guide rail 65 in a sliding manner, a second connecting plate 67 is arranged on the third sliding block 66, a laser host 55 is arranged on the second connecting plate 67, the second connecting plate 67 is fixedly connected with the first connecting plate 59, and further synchronous movement of the laser host 55 and the galvanometer cutting head 56 is achieved, so that laser beams emitted by the laser host 55 can always fall onto the corresponding galvanometer cutting head 56. And in order to support the laser host 55 and facilitate sliding, a plurality of guide posts 68 are further arranged on the upper end face of the cross beam 49, a connecting block 69 is slidably arranged on each guide post 68, and the connecting block 69 is connected with the bottom end face of the second connecting plate 67 to guide and support the laser host 55. In this embodiment, the CCD sensor 48 and the galvanometer assembly 54 are both movable, so that the device is suitable for punching glass plates with different specifications and sizes.

Before the device punches, a glass sheet is correctly placed on the support table 40 at a predetermined punching position. Two CCD sensors 48 on the X-axis guide rail 41 and the cross beam 49 are driven to move to a designated position by the driving motors of the guide rails respectively according to the size specification of the glass plate, and a preset standard position is established by taking images. And moves the galvanometer assembly 54 above the predetermined perforation point.

And then the conveying belt group conveys the glass plate to be punched to the position below the vibrating mirror assembly 54 and the CCD sensor 48, after the CCD sensor 48 captures images and compares the images with a preset standard position, the vibrating mirror assembly 54 completes compensation according to the deflection of the lens in the comparison result, and the vibrating mirror assembly 54 falls to an actual punching point to start punching. After punching is finished, the conveyer belt group continuously conveys and finishes the blanking of the glass plate and the feeding of the next glass plate to be punched, and the conveyer belt group sequentially circulates.

Since the conveyor belt group is provided with a plurality of conveyor belts 6, the belt surface of each conveyor belt 6 is recessed differently, so that the upper surface of the glass plate is jumped, i.e. the upper surfaces of the glass plates are not in the same plane. In this embodiment, a range finder is also provided on one side of the galvanometer cutting head 56. Before the galvanometer assembly 54 punches, the rangefinder emits laser onto the glass plate surface, and obtains a height difference between the galvanometer cutting head 56 and the glass plate surface according to the retroreflected laser beam, and the galvanometer cutting head 56 compensates again according to the obtained height difference so that the focus of the laser beam always falls on the plate surface of the glass plate.

In addition, the dust collection assembly is also included in the present embodiment, and includes a dust collector 70 and a dust box 71. The dust box 71 penetrates the upper end surface of the support table 40 and is fixedly connected to the upper end surface of the support table 40. The part of the dust box 71 penetrating the upper end surface of the support table 40 and exposed on the table surface of the support table 40 is located between the two rows of conveyor belts 6. And the dust box 71 is positioned below the vibrating mirror assembly 54, and a plurality of dust collecting holes 72 are uniformly arranged on the upper end surface of the dust box 71 along the length direction of the cross beam 49, and a connecting sealing cover 73 is detachably arranged on each dust collecting hole 72. When the galvanometer assembly 54 is moved over a designated dust collection hole 72, a corresponding cover 73 on the dust collection hole 72 is opened so that the dust collection hole 72 is in an open state. And the corresponding sealing covers 73 on the other dust collecting holes 72 are in a closed state to avoid the overflow of dust in the dust collecting box 71, so as to ensure the sealing effect.

And as shown in fig. 7, the dirt collection assembly also includes the same number of conduits 74 as the vibrating mirror assemblies 54. The upper end face of the dust box 71 is provided with a dust collecting guide rail 75 along the length direction thereof, the dust collecting guide rail 75 is provided with a plurality of dust collecting slide blocks 76, each guide pipe 74 is provided with a supporting plate 78, and the supporting plates 78 are connected with the dust collecting slide blocks 76 so that the guide pipes 74 can move along the length direction of the dust collecting guide rail 75. When the galvanometer assembly 54 is moved over the designated dust collection hole 72, the conduit 74 is moved to the dust collection hole 72, the upper nozzle of the conduit 74 coincides with the punching point of the glass to be punched, and the lower nozzle of the conduit 74 coincides with the dust collection hole 72 in the opened state of the cover 73. And the dust container 70 is connected with the dust box 71 through a connection pipe. Dust during processing is sucked out and recovered by the dust collector 70.

By way of example only, when a batch of glass sheets of the same type is to be processed and laser drilled, the galvanometer assembly 54 is moved over the designated drilling location. Meanwhile, the knob designates the cover 73 on the dust collecting hole 72 below the punching position so that the dust collecting hole 72 is in an opened state. And moves the guide tube 74 to the dust collecting hole 72, the upper tube orifice of the guide tube 74 coincides with the punching point of the glass to be punched, and the lower tube orifice of the guide tube 74 coincides with the dust collecting hole 72 in the opened state of the cover 73. The conduit 74 and the cover 73 are then no longer adjusted and only the glass sheet needs to be fed in sequence for the perforating action.

When the laser drills holes at the specified punching positions of the glass sheet, the generated dust sequentially passes through the duct 74 and the dust collection holes 72 into the dust collection box 71, and is absorbed and collected by the dust collector 70. And it is easy to understand that in the process of laser drilling, the glass block cut by drilling can fall along with the gravity of the glass block, and the glass block can also be guided and collected into the dust box 71 through the guide pipe 74, so that the dust box 71 is convenient for subsequent recovery, and damage caused by falling of the glass block into other parts is avoided.

In this embodiment, as shown in fig. 14, the bottom of the dust box 71 is further provided with an opening. A baffle 79 is provided at the opening. The bottom of the supporting table 40 is provided with a driving cylinder 85, and an air rod of the driving cylinder 85 is connected with the baffle 79 to drive the baffle 79 to displace so as to block the opening or expose the opening. When the dust collection box 71 performs dust collection, the driving cylinder 85 drives the baffle 79 to shield the opening, so that dust is prevented from leaking from the opening. When the dust collection operation is finished, the dust in the processing process is sucked out by the dust collector 70, the particles such as glass blocks fall to the bottom of the dust collection box 71, the driving cylinder 85 drives the baffle 79 to move to expose the opening, and the glass blocks fall out from the opening. And the recovery box 80 is arranged below the dust box 71, the recovery opening is arranged on the upper end face of the recovery box 80, and the recovery opening of the recovery box 80 is opposite to the opening at the bottom of the dust box 71 so as to receive the particles falling from the opening for recovery. In order to allow the particulate material to fall from the opening into the recovery box 80, the length of the dust box 71 is gradually reduced from top to bottom along its height.

Meanwhile, two guide plates 81 are further arranged at the bottom of the supporting table 40, the plate surfaces of the two guide plates 81 are parallel to each other, and the two guide plates 81 are respectively arranged at two sides of the baffle 79. Each guide plate 81 is provided with a through groove 82 along the length direction thereof, and side walls on both sides of the baffle 79 are respectively inserted into the through grooves 82 of the two guide plates 81. When the driving cylinder 85 drives the barrier 79 to move, the side wall of the barrier 79 slides in the through groove 82. The through groove 82 plays a role in guiding the baffle 79, and the groove wall of the through groove 82 is propped against the bottom end surface of the baffle 79, so that the baffle 79 is supported, and the baffle 79 is prevented from shaking left and right.

In this embodiment, the width of the middle part of the through groove 82 is larger than the thickness of the baffle 79, and the width of the two ends of the through groove 82 is smaller than the thickness of the baffle 79, and the width of the through groove 82 gradually decreases from the middle part to the two ends to form a triangle structure. Insertion of baffle 79 into through slot 82 is facilitated by the greater slot width in the middle of through slot 82 than the thickness of baffle 79. In this embodiment, the tail end of the driving cylinder 85 is hinged to the supporting table 40, and the driving cylinder 85 is not on the same horizontal plane as the baffle 79. In the process of driving the baffle 79 to move so as to block or expose the bottom opening of the dust box 71, the movement track of the baffle 79 is inclined upward movement or inclined downward movement, and the width of the slot 82 is gradually reduced from the head ends of the two sides to the middle part to be gradually increased, so that the baffle 79 is provided with a movement space in the vertical direction, and the movement of the baffle 79 is facilitated.

Further, the upper end surface of the guide plate 81 is further provided with a guide groove 83 along its length direction, the guide groove 83 is communicated with the through groove 82, and a limit rod 84 is slidably provided in the guide groove 83. The stop lever 84 is connected with the upper end face of the baffle 79, and when the side wall of the baffle 79 slides in the through groove 82, the stop lever 84 is driven to slide in the guide groove 83 to be matched with the guide groove 83 for guiding, so that the moving track of the baffle 79 is further limited.

The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.

Claims

1. A method for laser drilling of photovoltaic glass, comprising the following steps:

c) According to a derivation equation of a straight line where the first measurement side edge is located and a derivation equation of a straight line where the second measurement side edge is located, deriving an intersection point A4 (X4, Y4) where the first measurement side edge and the second measurement side edge are located on a glass plate to be perforated, wherein the intersection point coordinate derivation equation set is as follows:

d) Establishing a glass sheet to be perforatedA derivative equation of the deflection angle θ of the first measurement side with respect to the first standard side:

e) Establishing a derivative equation of an actual punching circle center (X6, Y6): combining preset punching circle centers (X5, Y5) to obtain azimuth angles theta' of A4 (X4, Y4) and actual punching circle centers (X6, Y6), and obtaining the following components:

when k >0, and 90 ° - θ' > θ

X6=x4+lsin θ'

Y6=y4+lcos θ "; where θ "=θ+θ';

when k >0, and 90 ° - θ' < θ

X6=x4+lsin θ'

y6=y4-Lcos θ "; wherein θ "=180 ° - θ - θ';

when k is less than 0 and θ' >180 ° - θ

X6=x4+lsin θ'

Y6=y4+lcos θ "; wherein θ "=θ+θ' -180 °;

when k is less than 0 and θ' < 180 ° - θ

x6=x4-Lsin θ'

Y6=y4+lcos θ "; wherein θ "=180 ° - θ - θ';

and is also provided with

s5, conveying and blanking the punched glass plate;

s6, repeating the steps S2-S5 to realize batch punching of the glass plates.

2. The method of laser drilling photovoltaic glass according to claim 1, wherein S3 is performed by measuring and compensating for the vertical distance between the vibrating mirror assembly and the glass plate surface according to the distance meter before the vibrating mirror assembly is drilled.