CN112404755A

CN112404755A - Photovoltaic glass laser drilling method

Info

Publication number: CN112404755A
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: 2021-02-26
Anticipated expiration: 2040-09-23
Also published as: CN112404755B

Abstract

The invention discloses a photovoltaic glass laser drilling method, which comprises the steps of obtaining the position of a glass plate to be drilled through the preset standard position and downwards shooting an image of the glass plate to be drilled 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 enabling a lens in a galvanometer assembly to deflect according to the actual drilling circle center to complete compensation and drill a hole on the glass plate around the actual drilling circle center. By the method, even if the glass plate deflects in the conveying process, the glass plate can be accurately punched.

Description

Photovoltaic glass laser drilling method

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 application of glass is more and more extensive, in particular to the fields of photovoltaic solar glass, automobile glass, architectural engineering glass and the like. And different requirements are required for different application scenes and glass. For example, photovoltaic glass, during the installation process, it is also necessary to punch through holes in a row on the surface of the photovoltaic glass to facilitate the routing of lines such as bus lines.

The existing photovoltaic glass drilling is generally mechanical drilling, the mechanical glass drilling machine is similar to an existing vertical drilling machine, a motor is adopted to drive a drill bit main shaft through a belt, and the diamond rotates at a high speed to drill. However, mechanical drilling has the problems that the diamond 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, which is the earliest practical laser processing technology and one of the main application fields of laser processing. The high-power-density laser beam is used for irradiating the processed material, so that the material is quickly heated to a vaporization temperature and is evaporated to form holes.

However, in the process of feeding the glass plate, the glass plate is usually fed by adopting a conveying belt conveying mode, and because the plate surface of the glass plate is too large, a plurality of conveying belts are required to convey the glass plate side by side, and the friction force between each conveying belt and the glass plate has certain difference, so that the glass plate deflects in the conveying process, and the laser drilling position is dislocated.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a photovoltaic glass laser drilling method which compares the position of the glass to be drilled, which is shot by a CCD sensor, with a preset standard position and performs compensation drilling by a galvanometer component.

The technical scheme adopted by the invention is as follows:

a glass laser drilling method comprises the following steps:

s1, presetting a standard position, wherein the standard position is the position of a glass plate correctly placed on a support table, selecting a pair of right-angle sides of the glass plate correctly placed to establish a coordinate system OXY, 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 vertical 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; selecting points A1(X1,0) and A2(X2,0) on the X axis, selecting points A3(0, Y1) on the Y axis, arranging CCD sensors above A1(X1,0), A2(X2,0) and A3(0, Y1), and respectively overlapping the projection of the centers of the three CCD sensors on the surface of the glass plate with A1(X1,0), A2(X2,0) and A3(0, Y1); a preset punching circle center (X5, Y5) is selected on the glass plate which is correctly placed, a galvanometer component is arranged above the preset punching circle center, and light beams of the galvanometer component can draw a circle around the preset punching circle center (X5, Y5) to punch the hole;

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) the three CCD sensors downwards shoot images of the glass plate to be punched, the position of the glass plate to be punched is obtained and is compared with a preset standard position, the horizontal distance between the center of the corresponding CCD sensor and the side edge of the glass plate below the corresponding CCD sensor is obtained, and Y2, Y3 and X3 are respectively obtained; the side edge of the glass plate to be punched, which is close to the X axis, is a first measuring side edge, the side edge of the glass plate to be punched, which is close to the Y axis, is a second measuring side edge, wherein 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; points a1 ' (X1, Y2), a2 ' (X2, Y3), A3 ' (X3, Y1) were obtained; if Y2, Y3 and X3 are all 0, the light beam of the galvanometer component draws a circle around the center (X5 and Y5) of the preset punching hole to punch the hole;

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

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

c) 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, the intersection point A4(X4, Y4) of the first measuring side edge and the second measuring side edge on the glass plate to be punched is obtained, and the equation system of the intersection point coordinate is as follows:

d) establishing an equation for the deflection angle θ of the first measured side edge of the glass sheet to be perforated relative to the first standard side edge:

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

When k is greater than 0 and 90-theta' > theta

Then X6 ═ X4+ Lcos θ "

Y6 ═ Y4+ Lsin θ "; where θ "═ θ + θ';

when k is greater than 0 and 90-theta' < theta

Then X6 ═ X4-Lcos θ "

Y6 ═ Y4+ Lsin θ "; wherein θ ″ -180 ° - θ';

when k is less than 0 and theta' > 180-theta

Then X6 ═ X4+ Lcos θ "

Y6 ═ Y4+ Lsin θ "; where θ "═ θ + θ' -180 °;

when k is less than 0 and theta' is less than 180 DEG-theta

Then X6 ═ X4+ Lcos θ "

Y6 ═ Y4-Lsin θ "; wherein θ ″ -180 ° - θ';

and is

S4, the galvanometer component completes compensation of deflection of the internal lens according to the actual punching circle center (X6, Y6), and holes are punched on the glass plate around the actual punching circle center (X6, Y6);

s5, conveying and blanking the punched glass plate;

and S6, repeating the steps S2-S5, and realizing batch punching of the glass plates.

In a further aspect, the step S3 is that before the galvanometer assembly is punched, the galvanometer assembly measures and compensates for vertical separation from the glass sheet surface according to the distance meter.

Advantageous effects

1. The CCD sensor is used for capturing the glass plate to be punched and comparing the glass plate with a preset standard position, punching is performed through automatic compensation of the galvanometer component, and accurate punching can be achieved even if the glass plate deflects in the conveying process.

2. The CCD sensor and the galvanometer component can be moved, so that the device is suitable for punching glass plates of different specifications and sizes.

3. The height difference between the galvanometer component and the glass plate surface is determined through the distance meter, so that laser emitted by the galvanometer component always falls onto the plate surface of the glass plate.

Drawings

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

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 the glass perforating apparatus;

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 the glass punching apparatus at another viewing angle;

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

FIG. 9 is a side view of the glass perforating apparatus;

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

FIG. 11 is a schematic diagram of the coordinate determination of A4 on a glass to be punched;

FIG. 12 is a schematic diagram of a first measurement side slope greater than 0 when finding the actual punching circle center coordinate;

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

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

FIG. 15 is a schematic diagram of a first measurement side slope less than 0 when finding the actual punching circle center coordinate;

FIG. 16 is another schematic diagram of a first measurement side slope less than 0 when finding the actual punching circle center coordinate;

FIG. 17 is another schematic diagram of the first measurement side slope greater than 0 when finding the actual center coordinates of the hole.

The reference numerals in the schematic drawings illustrate:

6-conveying belt, 40-supporting table, 41-X-axis guide rail, 42-Y-axis guide rail, 43-Y-axis slide block, 44-Y-axis driving motor, 45-fourth guide rail, 46-fourth slide block, 47-fourth driving motor, 48-CCD sensor, 49-beam, 50-bracket, 51-first guide rail, 52-first driving motor, 54-galvanometer component, 55-laser host, 56-galvanometer cutting head, 57-second guide rail, 58-second slide block, 59-first connecting plate, 60-fifth slide block, 61-third connecting plate, 62-limiting block, 63-screw rod, 64-bulge, 65-third guide rail, 66-third slide block, 67-second connecting plate and 68-guide column, 69-connecting block, 70-dust collector, 71-dust collecting box, 72-dust collecting hole, 73-sealing cover, 74-guide pipe, 75-dust collecting guide rail, 76-dust collecting slide block, 77-fixing plate, 78-supporting plate, 79-baffle, 80-recovery box, 81-guide plate, 82-through groove, 83-guide groove, 84-limiting rod and 85-driving cylinder.

Detailed Description

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

In the description of the present invention, it is to 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 those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

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

s1, presetting a standard position, where the standard position is a position of a glass plate correctly placed on the support table, and as shown in fig. 10, selecting a pair of right-angle sides of the glass plate correctly placed to establish a coordinate system OXY, where a side of the glass plate falling on the X axis is a first standard side, an extending direction of the first standard side is perpendicular to a conveying direction of the glass plate, a side of the glass plate falling on the Y axis is a second standard side, and an extending direction of the second standard side is the same as the conveying direction of the glass plate; selecting points A1(X1,0) and A2(X2,0) on the X axis, selecting points A3(0, Y1) on the Y axis, arranging CCD sensors above A1(X1,0), A2(X2,0) and A3(0, Y1), and respectively overlapping the projection of the centers of the three CCD sensors on the surface of the glass plate with A1(X1,0), A2(X2,0) and A3(0, Y1); and a preset punching circle center (X5, Y5) is selected on the glass plate which is correctly placed, a galvanometer component is arranged above the preset punching circle center, and the light beam of the galvanometer component can draw a circle around the preset punching circle center (X5, Y5) to punch a hole.

And S2, conveying the glass plate to be punched to the 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) the three CCD sensors downwards shoot images of the glass plate to be punched, the position of the glass plate to be punched is obtained and is compared with a preset standard position, the horizontal distance between the center of the corresponding CCD sensor and the side edge of the glass plate below the corresponding CCD sensor is obtained, and Y2, Y3 and X3 are respectively obtained; the side edge of the glass plate to be punched, which is close to the X axis, is a first measuring side edge, the side edge of the glass plate to be punched, which is close to the Y axis, is a second measuring side edge, wherein 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; points a1 ' (X1, Y2), a2 ' (X2, Y3), A3 ' (X3, Y1) were obtained; if Y2, Y3 and X3 are all 0, the beam of the galvanometer component draws a circle around the center (X5 and Y5) of the preset hole to form a hole.

b) And (3) establishing an equation of a straight line where the first measuring side edge of the glass plate to be punched is located according to the formula of y-kx + b:

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

c) and 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 punched 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 of the coordinate of the intersection point is as follows:

d) establishing an equation for the deflection angle theta of the first measured side edge of the glass sheet to be perforated relative to the first standard side edge, by the following procedure:

as shown in fig. 11 (solid lines in fig. 11-13 are glass plates to be punched, and dotted lines are glass plates placed correctly, i.e. predetermined standard positions), we can obtain:

the value of θ can then be determined from tan θ.

d) Presetting the actual punching circle center (X6, Y6) according to theta, wherein the actual punching circle center (X5, Y5) comprises the following steps:

connecting the point A4 with the center of a preset punching circle to obtain a right-angled triangle with the length of X5 in the X-axis direction and Y5 in the Y-axis direction

And is

L is the linear distance between the point a4 and the preset punching center.

As shown in fig. 12, an azimuth angle θ ″ between a4(X4, Y4) and the actual punching center (X6, Y6) is calculated according to the value of k, and then a linear distance L between a4(X4, Y4), a4(X4, Y4) and the actual punching center (X6, Y6) and the azimuth angle θ ″ are calculated to obtain an equation set:

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

Then X6 ═ X4+ Lcos θ "

Y6 ═ Y4+ Lsin θ "; where θ "═ θ + θ';

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

Then X6 ═ X4-Lcos θ "

Y6 ═ Y4+ Lsin θ "; wherein θ ″ -180 ° - θ';

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

Then X6 ═ X4+ Lcos θ "

Y6 ═ Y4+ Lsin θ "; where θ "═ θ + θ' -180 °;

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

Then X6 ═ X4+ Lcos θ "

Y6 ═ Y4-Lsin θ "; wherein θ ″ -180 ° - θ';

and is

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

S4, the galvanometer component deflects the internal lens to complete compensation according to the actual punching circle center (X6, Y6), meanwhile, a distance meter beside the galvanometer component emits laser, the height difference between the galvanometer component and the glass plate surface is judged according to the reflected light beam to ensure that the laser emitted by the galvanometer component always falls on the glass plate surface, and then the galvanometer component punches a hole on the glass plate around the actual punching circle center (X6, Y6) to complete punching.

And S5, conveying and blanking the punched glass plate.

The laser punching device of the above method, as shown in fig. 1-9 and fig. 14, includes a support 40, and the support 40 is provided with a plurality of conveyor belts 6 for conveying glass plates, and in this embodiment, the number of conveyor belts 6 is plural, and 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 disposed on 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 disposed on the two Y-axis guide rails 42, specifically, a Y-axis slider 43 and a Y-axis driving motor 44 are disposed on the Y-axis guide rails 42, the Y-axis driving motor 44 is connected to the Y-axis slider 43 to drive the Y-axis slider 43 to move on the Y-axis guide rails 42 along the length direction thereof, the X-axis guide rails 41 are disposed 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 sliders 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. As shown in fig. 7 and 8, two fourth guide rails 45 are further provided on the X-axis guide rail 41 along the longitudinal direction thereof, a fourth slider 46 is slidably provided on the fourth guide rails 45, and the fourth slider 46 is driven by a fourth driving motor 47 provided on the fourth guide rails 45. And a CCD sensor 48 is connected to each of the fourth sliders 46 on the two fourth guide rails 45.

The supporting table 40 is further provided with a cross beam 49, the cross beam 49 is transverse above 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 beam 49 are fixedly connected to the upper end surface of the support 40 through brackets 50. The front end surface of the cross beam 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 6, and the width direction of the conveyor 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 conveyor 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 each galvanometer assembly 54 comprises a laser host 55 and a galvanometer cutting head 56. The galvanometer assemblies 54 are each 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 slide rail is arranged on the first connecting plate 59 along the vertical direction, and a fifth slide block 60 is slidably arranged on the fifth slide rail. The fifth slider 60 is provided with a third connecting plate 61, and the galvanometer cutting head 56 is fixedly connected with the third connecting plate 61. The first connecting plate 59 is provided with a limiting block 62, the limiting block 62 penetrates through a screw 63 in the vertical direction, and the screw 63 is in threaded connection with the limiting block 62. The side wall of the third connecting plate 61 is provided with a protrusion 64 along the length direction of the cross beam 49, and the thread head of the screw 63 abuts against the protrusion 64. The third connecting plate 61 is jacked up through the knob screw 63, and then the galvanometer 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 slidably arranged on the third guide rail 65, 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, and the second connecting plate 67 is fixedly connected with the first connecting plate 59, so that the laser host 55 and the galvanometer cutting head 56 can move synchronously, and laser beams emitted by the laser host 55 can always fall onto the corresponding galvanometer cutting head 56. In order to support the laser host 55 so as to facilitate sliding, the upper end surface of the cross beam 49 is further provided with a plurality of guide posts 68, each guide post 68 is slidably provided with a connecting block 69, and the connecting block 69 is connected with the bottom end surface of the second connecting plate 67 so as to guide and support the laser host 55. In the scheme, the CCD sensor 48 and the galvanometer component 54 can be moved, so that the device is suitable for punching glass plates with different specifications and sizes.

Before the device is punched, a glass plate is correctly placed on the support 40 at a preset punching position. According to the size specification of the glass plate, two CCD sensors 48 on the X-axis guide rail 41 and the cross beam 49 are driven by the driving motors of the guide rails where the two CCD sensors are respectively located to move to the specified positions, and images are shot to establish the preset standard positions. 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 lower parts of the galvanometer component 54 and the CCD sensor 48, after the CCD sensor 48 captures an image and compares the image with a preset standard position, the galvanometer component 54 finishes compensation according to the deflection of the internal lens of the comparison result, and the galvanometer component 54 falls to an actual punching point to start punching. After the punching is finished, the conveying belt group continuously conveys the glass plate to finish the blanking and the feeding of the next glass plate to be punched, and the steps are sequentially circulated.

Since the plurality of conveyor belts 6 are arranged on the conveyor belt group, the degree of the depression of the belt surface of each conveyor belt 6 is different, so that the upper surface of the glass plate is jumped, namely the upper surface of the glass plate is 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 component 54 punches a hole, the distance measuring instrument emits laser to the surface of the glass plate, the height difference between the galvanometer cutting head 56 and the surface of the glass plate is obtained 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 surface of the glass plate.

In addition, the scheme also comprises a dust collection assembly which comprises a dust collector 70 and a dust collection box 71. The dust box 71 penetrates the upper end surface of the support 40 and is fixedly connected to the upper end surface of the support 40. The part of the dust box 71 which penetrates the upper end face of the support table 40 and is exposed on the table top of the support table 40 is positioned between the two rows of conveyor belts 6. And the dust box 71 is positioned below the galvanometer component 54, 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 sealing cover 73 can be detachably connected on each dust collecting hole 72. When the galvanometer assembly 54 moves above the designated dust collecting hole 72, the corresponding cover 73 on the dust collecting hole 72 is opened, so that the dust collecting 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 prevent the dust in the dust collecting box 71 from overflowing, thereby ensuring the sealing effect.

And as shown in fig. 7, the dust collection assembly also includes as many conduits 74 as there are galvanometer assemblies 54. The upper end surface 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 sliders 76, each guide pipe 74 is provided with a support plate 78, and the support plates 78 are connected with the dust collecting sliders 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 moves to the position above the designated dust collecting hole 72, the guide pipe 74 is moved to the dust collecting hole 72, the upper nozzle of the guide pipe 74 is overlapped with the punching point of the glass to be punched, and the lower nozzle of the guide pipe 74 is overlapped with the dust collecting hole 72 with the cover 73 in an open state. And the dust collector 70 is connected to the dust box 71 through a connection pipe. The dust generated during the 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 above a designated drilling location. At the same time, the knob designates the cover 73 on the dust collection hole 72 below the punching position so that the dust collection hole 72 is in an open state. And the guide pipe 74 is moved to the dust collecting hole 72, the upper nozzle of the guide pipe 74 is overlapped with the punching point of the glass to be punched, and the lower nozzle of the guide pipe 74 is overlapped with the dust collecting hole 72 with the cover 73 in an open state. The guide tube 74 and the cover 73 are then no longer adjusted, and the glass sheets need only be fed in sequence for the punching action.

When the laser beam drills a hole at a predetermined position of the glass plate, the generated dust passes through the duct 74 and the dust collecting hole 72 in order into the dust box 71, and is absorbed and collected by the dust collector 70. And it is easy to understand that during the laser drilling process, the glass block cut out by drilling will fall down along with the self gravity, and the glass block can also be guided and collected into the dust collection box 71 through the conduit 74, and collected by the dust collection box 71 for subsequent recovery, so as to avoid the glass block from falling into other components to cause damage.

In the present embodiment, as shown in fig. 14, the bottom of the dust box 71 is further provided with an opening. A baffle 79 is arranged at the opening. The bottom of the support table 40 is provided with a driving cylinder 85, and an air rod of the driving cylinder 85 is connected with the baffle 79 for driving the baffle 79 to displace to shield or expose the opening. When the dust box 71 performs a dust collecting operation, the driving cylinder 85 drives the baffle 79 to shield the opening, thereby preventing dust from leaking from the opening. After the dust collection operation is finished, the dust in the processing process is sucked out by the dust collector 70, the particles such as the 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 a recovery box 80 is arranged below the dust collection box 71, a recovery opening is arranged on the upper end surface 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 collection box 71 so as to receive the granular materials falling out from the opening for recovery. In order to make the particles fall into the recycling box 80 from the opening, the length of the dust box 71 is gradually reduced from top to bottom along the height thereof.

Meanwhile, the bottom of the support table 40 is further provided with two guide plates 81, the plate surfaces of the two guide plates 81 are parallel to each other, and the two guide plates 81 are respectively arranged on two sides of the baffle 79. Each guide plate 81 is provided with a through groove 82 along the length direction thereof, and the side walls of the two 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 baffle 79 to move, the side wall of the baffle 79 slides in the through groove 82. Play the effect of direction through leading to groove 82 to baffle 79, and the cell wall that leads to groove 82 offsets with the bottom end face of baffle 79, also plays the effect of support to baffle 79, prevents to rock about baffle 79.

In the present embodiment, the width of the middle portion of the through groove 82 is greater than the thickness of the baffle 79, the widths of the two ends of the through groove 82 are less than the thickness of the baffle 79, and the width of the through groove 82 gradually decreases from the middle portion to the two ends to form a triangular structure. The insertion of the baffle 79 into the through groove 82 is facilitated since the groove width of the middle portion of the through groove 82 is larger than the thickness of the baffle 79. And because the tail end of the driving cylinder 85 is hinged with the supporting table 40 in the scheme, the driving cylinder 85 is not positioned on the same horizontal plane with the baffle 79. In the process that the driving cylinder 85 drives the baffle 79 to move to shield or expose the bottom opening of the dust collection box 71, the motion trail of the baffle 79 moves obliquely upwards or obliquely downwards, the width of the through groove 82 is gradually reduced from the head ends of the two sides to the middle part, and the moving space of the baffle 79 in the vertical direction is provided, so that the baffle 79 can move conveniently.

Furthermore, the upper end surface of the guide plate 81 is further provided with a guide groove 83 along the length direction thereof, the guide groove 83 is communicated with the through groove 82, and a limit rod 84 is slidably arranged in the guide groove 83. The limiting rod 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 limiting rod 84 is driven to slide in the guide groove 83 and be matched with the guide groove 83 for guiding, so that the moving track of the baffle 79 is further limited.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. The laser drilling method for the photovoltaic glass is characterized by comprising the following steps of:

c) and deriving an intersection point A4(X4, Y4) of the first measuring side edge and the second measuring side edge on the glass plate to be punched according to a derivative equation of the straight line of the first measuring side edge and a derivative equation of the straight line of the second measuring side edge, wherein the system of the coordinate derivative equations of the intersection points is as follows:

d) establishing a derivative equation of the deflection angle theta of the first measuring side edge of the glass plate to be punched relative to the first standard side edge:

d) establishing a derivative equation of an actual punching circle center (X6, Y6): and (3) calculating an azimuth angle theta' of A4(X4, Y4) and an actual punching center (X6, Y6) by combining the preset punching centers (X5, Y5) to obtain:

when k is greater than 0 and 90-theta' > theta

Then X6 ═ X4+ Lcos θ "

Y6 ═ Y4+ Lsin θ "; where θ "═ θ + θ';

when k is greater than 0 and 90-theta' < theta

Then X6 ═ X4-Lcos θ "

Y6 ═ Y4+ Lsin θ "; wherein θ ″ -180 ° - θ';

when k is less than 0 and theta' > 180-theta

Then X6 ═ X4+ Lcos θ "

Y6 ═ Y4+ Lsin θ "; where θ "═ θ + θ' -180 °;

when k is less than 0 and theta' is less than 180 DEG-theta

Then X6 ═ X4+ Lcos θ "

Y6 ═ Y4-Lsin θ "; wherein θ ″ -180 ° - θ';

and is

s5, conveying and blanking the punched glass plate;

2. The method for laser drilling of photovoltaic glass according to claim 1, wherein the step S3 is that before drilling the galvanometer assembly, the galvanometer assembly measures and compensates for vertical spacing from the glass sheet surface according to a distance meter.