CN110722274B

CN110722274B - Laser cutting equipment

Info

Publication number: CN110722274B
Application number: CN201911051566.6A
Authority: CN
Inventors: 张万辉; 陈英米
Original assignee: Taizhou Zhitong Technology Co ltd
Current assignee: Sanmen Liante Building Materials Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2021-07-16
Anticipated expiration: 2039-10-31
Also published as: CN113319445A; CN110722274A

Abstract

The invention discloses laser cutting equipment which comprises a working platform, wherein a laser cutting device is arranged above the working platform; the laser cutting device is connected with the controller and is controlled by the controller to work; the laser cutting device comprises a ball screw cross sliding table; a laser generating device bracket is arranged on the ball screw cross sliding table; the laser generating device bracket is provided with a group of laser generating devices distributed along the same circumference; laser generating device include servo motor and with servo motor's pivot fixed connection's laser head, the laser head set up towards table surface and launch the direction with the central line of circumference is crossing. According to the laser cutting equipment, the plurality of laser heads are arranged, so that the laser of the plurality of laser heads is converged to the same point from different angles to cut the display panel, reflected light can be scattered along different angles, strong light is prevented from being reflected to the lens of the laser source to damage the lens, and the service life of the laser heads is prolonged.

Description

Laser cutting equipment

Technical Field

The invention relates to the technical field of laser cutting, in particular to laser cutting equipment.

Background

Laser cutting is an application technique which utilizes a focused high-power-density laser beam to irradiate a workpiece, so that the irradiated material is quickly melted, vaporized and ablated or reaches a burning point, and simultaneously, the melted substance is blown off by high-speed airflow coaxial with the beam, thereby realizing the cutting of the workpiece. The laser cutting technology can realize the cutting of various metal and nonmetal plates and a plurality of complex parts, the precision of a workpiece cut by laser is high, the cutting surface is flat, and the influence on the whole workpiece is very small, so that the application of the laser cutting technology is very wide, and the laser cutting technology is related to the fields of automobile industry, aerospace, national defense and the like.

With the continuous update of laser cutting equipment and the increasing advance of cutting technology, the application of laser cutting is more and more extensive in the cutting technology of display panels. The existing laser cutting equipment generally comprises a working platform and a laser cutting device arranged above the working platform, and the laser cutting device is controlled by a controller to work and comprises a moving mechanism and a laser source (laser head). The existing laser cutting equipment is generally only provided with one laser source (laser head), and the laser source (laser head) is just opposite to the display panel to cut in the laser cutting process; in this cutting mode, part of the laser light is reflected by the display panel, and the reflected laser light easily damages the lens of the laser light source.

Disclosure of Invention

The invention aims to provide laser cutting equipment, which is provided with a plurality of laser heads, so that lasers of the laser heads are converged to the same point from different angles to cut a display panel, reflected light can be scattered along different angles, strong light is prevented from being reflected to the lenses of the laser heads to damage the lenses, and the service lives of the laser heads are prolonged.

The technical scheme of the invention is as follows: a laser cutting device comprises a working platform, wherein a laser cutting device is arranged above the working platform; the laser cutting device is connected with the controller and is controlled by the controller to work; the laser cutting device comprises a ball screw cross sliding table; a laser generating device bracket is arranged on the ball screw cross sliding table; the laser generating device bracket is provided with a group of laser generating devices distributed along the same circumference; the number of the laser generating devices is odd; laser generating device include servo motor and with servo motor's pivot fixed connection's laser head, the laser head set up towards work platform and launch the direction with the central line of circumference is crossing to make the laser of a plurality of laser heads can assemble the cutting to display panel on the same spot from different angles, the reverberation can be followed different angles and dispersed, avoids the highlight to reflect the camera lens of laser head.

Compared with the prior art, the laser cutting equipment has the advantages that the plurality of laser heads are arranged, so that light rays of the plurality of laser heads are irradiated from different angles and converged to the same point, energy superposition is realized, the display panel is cut, reflected light can be scattered from different angles, and damage to the laser heads due to strong light reflection is avoided; in addition, the laser head in the invention has lower single power, higher reliability and lower failure rate; and the number of the laser heads of the laser generating device is singular, at the moment, the laser heads are arranged asymmetrically, the reflected laser can not irradiate other laser heads, and the possibility of laser head reflected light damage is avoided from the source.

And optimally, the laser range finder facing the working platform is arranged on the laser generating device support. At the moment, when the thickness of the display panel to be cut set by the controller is inconsistent with the actual thickness, the system can actively identify the actual thickness of the display panel to be cut, so that the irradiation angle of the laser head is adjusted to the correct position by the servo motor, the smooth operation of cutting operation is ensured, and meanwhile, the local damage of the display panel caused by the fact that the laser is not correctly converged to one point on the display panel is avoided.

Preferably, the outer contour of the laser generating device support is circular, and the laser generating device is mounted on the periphery of the laser generating device support. The circular laser generating device support is convenient to manufacture and beneficial to controlling production cost, and in addition, the circular laser generating device support also has the characteristic of being convenient for mounting the laser generating device.

Preferably, the number of the laser generating devices is 9-15, and the laser generating devices are uniformly distributed along the circumferential direction of the circumference, wherein the laser power of a single laser head is 3w-20 w. The probability of damage of the laser heads can be reduced by working a plurality of laser heads together, but when the number of the laser heads is too large, the use cost of the laser heads is increased, and the inventor finds out that 9-15 laser heads are better; and when the laser power is set to be 3w-20w, the total laser cutting power can meet the power requirement for cutting various display panels. Preferably, the number of the laser generating devices is 9, and the laser power of a single laser head is 10 w.

And as optimization, the controller is fixedly arranged on the working platform. At this moment, the whole machine is compact and convenient to operate.

Preferably, the cross sliding table of the ball screw is of a double-guide-rail structure. At this moment, the laser generating device support moves more stably on the cross sliding table.

Drawings

FIG. 1 is a schematic structural view of a laser cutting apparatus of the present invention;

FIG. 2 is an A-directional view of the work platform of FIG. 1;

FIG. 3 is a schematic view of the connection between the laser generator bracket and the first ball screw sliding table according to the present invention;

FIG. 4 is a schematic view of a laser generator of the present invention mounted on a laser generator support;

FIG. 5 is a schematic structural view of a ball screw slide table in the present invention;

fig. 6 is a schematic diagram of the rotation of the laser head in the present invention.

The labels in the figures are: 1-a working platform; 2-laser generating device support; 3-laser generating device, 31-servo motor, 32-laser head; 4-ball screw cross slide, 41-first ball screw slide, 42-second ball screw slide, 43-first motor, 44-second motor, 45-fixed seat, 46-slide, 47-ball screw, 48-coupler, 49-base; 5-a controller; 6-laser range finder; 7-a display panel; 71-precut.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Referring to fig. 1 to 5, the laser cutting apparatus of the present invention includes a working platform 1, and a laser cutting device is disposed above the working platform 1; the laser cutting device is connected with the controller 5 and is controlled by the controller 5 to work; the laser cutting device comprises a ball screw cross sliding table 4; the ball screw cross sliding table 4 is provided with a laser generating device bracket 2; the laser generating device bracket 2 is provided with a group of laser generating devices 3 distributed along the same circumference; laser generating device 3 includes servo motor 31 and the laser head 32 with servo motor 31's pivot fixed connection, laser head 32 set up towards work platform 1 and the transmission direction with the central line of circumference is crossing.

The ball screw cross sliding table 4 comprises a first ball screw sliding table 41 and a second ball screw sliding table 42 which is perpendicular to the first ball screw sliding table 41; the first ball screw sliding table 41 is connected with the laser generating device bracket 2 in a sliding manner through a sliding block 46; the first ball screw sliding table 41 is driven by a first motor 43, and the second ball screw sliding table 43 is driven by a second motor 44; the first motor 43 and the second motor 44 are both connected to the controller. As shown in fig. 3, the ball screw sliding table is composed of a base 49, a fixing base 45, a slider 46 and a ball screw 47. The ball screw is a precise and labor-saving transmission mechanism, has the advantages of high transmission precision, stable operation, high transmission efficiency and the like, has small friction loss and longer service life, and the ball screw sliding table is used for driving the laser generating device bracket 2 to operate, thereby being beneficial to controlling the movement precision and the control cost; in addition, the motor drives the ball screw 47 to move, so that the control accuracy is high, the speed regulation is convenient, the energy consumption is low, the efficiency is high, and the use cost is low. As shown in fig. 2, in operation, the first motor 43 drives the first ball screw sliding table 41 and the laser generating device bracket 2 to move, and the laser emitted by the laser head 32 cuts the material placed on the working platform 1 along the Y-axis direction; the second motor 44 drives the second ball screw sliding table 42 to drive the first ball screw sliding table 41 and the laser generating device bracket to move, and the laser emitted by the laser head 32 cuts materials along the X-axis direction. In addition, the first ball screw sliding table 41 and the first motor 43 and the second ball screw sliding table 42 and the second motor 44 are fixedly connected through a coupler 48. The shaft coupling 48 is used for connection, so that the installation is easy, the central line positions of the rotating shaft of the ball screw 47 and the two shafts of the rotating shaft of the motor can be ensured to be respectively and stably rotated when a small amount of deviation exists, the torque transmission is not influenced, and the transmission performance is ensured; in addition, the coupling 48 has a certain damping performance and overload safety protection.

Usually, the thickness of the display panel 7 to be cut is determined, then the irradiation direction of the laser head 32 is also determined, and the servo motor 31 will adjust the laser head 32 to the correct angle according to the instruction of the controller 5, however, sometimes, the actual thickness of the display panel 7 to be cut may not be consistent with the thickness set in the controller 5 (generally, it is considered as an negligence), in this case, the data needs to be corrected, so that the servo motor 31 can adjust the laser head 32 to the correct irradiation angle. As a specific example: the laser distance measuring instrument 6 facing the working platform 1 is arranged on the laser generating device support 2, so that the thickness of the display panel 7 to be cut can be determined by measuring the distance between the laser distance measuring instrument 6 and the display panel 7 to be cut. At this time, when the thickness of the display panel 7 to be cut set in the controller 5 is not consistent with the actual thickness, the system can actively identify the actual thickness of the display panel 7 to be cut, so that the servo motor 31 adjusts the irradiation angle of the laser head 32 to the correct position, thereby ensuring smooth cutting operation, and meanwhile, avoiding local damage of the display panel 7 caused by the fact that the laser is not correctly converged to one point on the display panel 7.

As a specific example: referring to fig. 4, the outer contour of the laser generator holder 2 is circular, and the laser generator 3 is mounted on the outer periphery of the laser generator holder 2. The circular laser generating device support 2 is convenient to manufacture and beneficial to controlling production cost, and in addition, the circular laser generating device support 2 also has the characteristic of being convenient for mounting the laser generating device 3.

As a specific example: the number of the laser generating devices 3 is 9-15, and the laser generating devices are uniformly distributed on the circumference, wherein the laser power of the single laser head 32 is 3w-20 w. Working with multiple laser heads 32 can reduce the probability of damage to the laser heads 32; however, when the number of the laser heads is too large, the use cost of the laser heads is increased, and the inventor finds out that 9 to 15 laser heads are preferable; and when the laser power is set to be 3w-20w, the total laser cutting power can meet the power requirement for cutting various display panels. Further, the number of the laser heads 32 of the laser generating device 3 is singular. At this time, the laser heads 32 are arranged asymmetrically, and the reflected laser light does not irradiate other laser heads 32, thereby avoiding the possibility that the laser heads 32 are damaged by the reflected light from the source. As a preferred embodiment: the number of the laser generating devices 3 is 9, wherein the laser power of a single laser head 32 is 10 w.

As a specific example: the controller 5 is fixedly arranged on the working platform 1. At this moment, the whole machine is compact and convenient to operate.

As a specific example: the ball screw cross sliding table 4 is of a double-guide-rail structure. At this time, the movement of the laser generator holder 2 on the ball screw cross slide 4 is more stable.

Laser cutting principle: placing a display panel 7 to be cut on the working platform 1; starting the first motor 43 and the second motor 44, driving the first ball screw sliding table 41 and the second ball screw sliding table 42 to move and driving the laser generating device bracket 2 to move, so that the circumferential central line of the laser generating device bracket 2 and the pre-cut mark 71 of the display panel 7 to be cut form an angle of 90 degrees; the distance between the laser range finder 6 and the display panel 7 to be cut is measured by the laser range finder 6 and sent to the controller 5, the controller 5 calculates the actual thickness of the display panel 7 to be cut, and judges the distance H between the correct focus position and the circle center of the laser generating device bracket 2; after the angle is adjusted, each laser head 32 emits corresponding laser, the energy of a plurality of laser beams is focused to the same point, and the display panel 7 to be cut on the working platform 1 is cut; during cutting, the first motor 43 drives the first ball screw to drive the laser generating device bracket 2 to move, so that the laser emitted by the laser head 32 cuts the display panel 7 placed on the working platform 1 along the Y-axis direction; the second motor 44 drives the second ball screw to drive the first ball screw sliding table 41 and the laser generating device bracket 2 to move, so that the laser emitted by the laser head 32 cuts the display panel 7 along the X-axis direction.

The display panel 7 to be cut in the invention can be a liquid crystal display screen panel such as an LED, an FPD, a PET and the like or a mobile phone touch screen panel.

The above general description of the invention and the description of the specific embodiments thereof, as referred to in this application, should not be construed as limiting the technical solutions of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the protection scope of the present application according to the disclosure of the present application without departing from the structural elements of the present invention.

Claims

1. A laser cutting device comprises a working platform (1), wherein a laser cutting device is arranged above the working platform (1); the laser cutting device is connected with the controller (5) and is controlled by the controller (5) to work; the method is characterized in that: the laser cutting device comprises a ball screw cross sliding table (4); a laser generating device bracket (2) is arranged on the ball screw cross sliding table (4); the laser generating device bracket (2) is provided with a group of laser generating devices (3) distributed along the same circumference; the number of the laser generating devices (3) is singular; laser generating device (3) including servo motor (31) and with servo motor (31) pivot fixed connection's laser head (32), laser head (32) set up towards work platform (1) and the emission direction with the central line of circumference is crossing to make the laser of a plurality of laser heads (32) can cut display panel on assembling to the same point from different angles, the reverberation can be followed different angles and dispersed, avoids the highlight to reflect the camera lens of laser head (32).

2. The laser cutting apparatus according to claim 1, wherein: and a laser range finder (6) facing the working platform (1) is arranged on the laser generating device bracket (2).

3. The laser cutting apparatus according to claim 1, wherein: the outer contour of the laser generating device support (2) is circular, and the laser generating device (3) is installed on the periphery of the laser generating device support (2).

4. The laser cutting apparatus according to claim 3, wherein: the number of the laser generating devices (3) is 9-15, and the laser generating devices are uniformly distributed along the circumferential direction of the circumference, wherein the laser power of a single laser head (32) is 3w-20 w.

5. The laser cutting apparatus according to claim 4, wherein: the number of the laser generating devices (3) is 9, wherein the laser power of a single laser head (32) is 10 w.

6. The laser cutting apparatus according to any one of claims 1 to 5, wherein: the controller (5) is fixedly arranged on the working platform (1).

7. The laser cutting apparatus according to any one of claims 1 to 5, wherein: the ball screw cross sliding table (4) is of a double-guide-rail structure.