A safety warning device for laser processing and control method thereof

Abstract

The present invention discloses a safety warning device for laser processing and a control method thereof. The device includes a laser, an indicator light, a beam combiner, a controller, an intermediate relay KA1, an intermediate relay KA2, an intermediate relay KA3 and a power supply; the laser is used to emit invisible laser, the indicator light is used to emit indicator light, and the beam combiner is arranged between the optical output port of the laser and the optical output port of the indicator light, and is used to combine the invisible laser with the indicator light; the laser has a laser light output signal input port and a laser alarm signal output port, the indicator light has a positive input terminal and a negative input terminal, and the controller has an indicator light control output port, a laser light output control output port and a laser alarm signal input port. The present invention can control the emission of indicator light to indicate the laser trajectory during laser processing, and the operator can judge the state of laser processing according to the state of the indicator light, so as to improve safety protection, reduce laser damage, and improve production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of laser processing safety technology, and in particular to a safety warning device for laser processing and a control method thereof. Background Art

[0002] With the popularization of laser processing technology, safety protection requirements during laser processing have become more important. Some traditional lasers have built-in weak indicator lights, but in order to reduce damage to the laser, the weak indicator light needs to be turned off when emitting laser light. The traditional external indicator light cannot control the light when controlling laser processing. Lasers can be divided into visible lasers and invisible lasers according to their wavelengths. The trajectory of invisible laser processing cannot be clearly seen during the processing of invisible lasers. Therefore, operators are prone to accidentally touch the invisible laser of laser processing during processing, or operators cannot determine the status of laser processing during operation, resulting in injuries caused by lasers. These situations affect the physical and mental safety of laser equipment operators. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a safety warning device for laser processing and a control method thereof. During laser processing, the indicator light can be controlled to indicate the laser trajectory, and the operator can judge the state of the laser processing according to the state of the indicator light, so as to improve safety protection, reduce laser damage and improve production efficiency.

[0004] The technical solution of the present invention is as follows:

[0005] A safety warning device for laser processing, comprising a laser, an indicator light, a beam combiner, a controller, an intermediate relay KA1, an intermediate relay KA2, an intermediate relay KA3 and a power supply;

[0006] The laser is used to emit invisible laser light, the indicator light is used to emit indicator light, and the beam combiner is arranged between the light output port of the laser and the light output port of the indicator light, and is used to combine the invisible laser light and the indicator light;

[0007] The laser has a laser light output signal input port and a laser alarm signal output port, the indicator light has a positive input terminal and a negative input terminal, and the controller has an indicator light control output port, a laser light output control output port and a laser alarm signal input port;

[0008] One end of the intermediate relay KA1 coil is connected to the positive pole of the power supply, the other end of the intermediate relay KA1 coil is connected to the indicator light control output port of the controller, one end of the normally open contact of the intermediate relay KA1 is connected to the positive pole of the power supply, the other end of the normally open contact of the intermediate relay KA1 is connected to the positive input end of the indicator light, and the negative input end of the indicator light is connected to the negative pole of the power supply;

[0009] One end of the intermediate relay KA2 coil is connected to the positive pole of the power supply, the other end of the intermediate relay KA2 coil is connected to the laser light control output port of the controller, one end of the normally open contact of the intermediate relay KA2 is connected to the negative pole of the power supply, and the other end of the normally open contact of the intermediate relay KA2 is connected to the laser light signal input port of the laser;

[0010] One end of the intermediate relay KA3 coil is connected to the positive pole of the power supply, the other end of the intermediate relay KA3 coil is connected to the laser alarm signal output port of the laser, one end of the normally open contact of the intermediate relay KA3 is connected to the negative pole of the power supply, and the other end of the normally open contact of the intermediate relay KA3 is connected to the laser alarm signal input port of the controller.

[0011] The beam combining mirror can penetrate the invisible laser and reflect the indicator light, and the paths of the invisible laser and the indicator light are overlapped by installing at a 45° angle.

[0012] A scanning galvanometer is also provided on the beam combining optical path of the beam combining mirror, and the scanning galvanometer can change the transmission direction of the optical path by controlling the rotational movement of the lens inside the scanning galvanometer.

[0013] The power supply is a DC 24V power supply.

[0014] The control method of the safety warning device for laser processing comprises:

[0015] Start the laser processing. After receiving the start signal, the controller outputs the laser light control signal and the indicator light control signal respectively;

[0016] When the controller outputs the laser light control signal, it triggers the intermediate relay KA2 coil to close, the normally open contact of the intermediate relay KA2 closes, and the laser receives the laser light signal and emits invisible laser;

[0017] When the controller outputs the indicator light control signal, it triggers the intermediate relay KA1 coil to close, the normally open contact of the intermediate relay KA1 closes, and the indicator light is energized to emit an indication light;

[0018] Then the invisible laser and the indicator light are combined together by the beam combiner and then act on the surface of the workpiece.

[0019] When an abnormal error occurs in the laser, the laser will output a laser alarm signal, triggering the intermediate relay KA3 coil to energize, and the normally open contact of the intermediate relay KA3 will close. After receiving the laser alarm signal, the controller will output an indicator light control signal to control the indicator light to flash.

[0020] When the laser abnormality error is one, the controller controls the indicator light to flash at a fixed cycle time.

[0021] When there are multiple abnormal errors of the laser, the controller controls the indicator light to flash at different cycle times.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1) During the laser processing, the indicator light can follow the processing track of the invisible laser, so that the operator can clearly see the current processing position and situation of the laser, thereby avoiding damage caused by the laser during the operation process and ensuring the safety of the operator;

[0024] 2) When the laser fails abnormally, it will alarm and judge by the flashing of the indicator light. The operator can judge the fault content by the different flashing frequencies of the indicator light and carry out targeted maintenance, which saves the tedious troubleshooting time and improves maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is one of the structural framework diagrams of the present invention;

[0027] Figure 2 This is the second structural framework diagram of the present invention;

[0028] Figure 3 It is the control principle diagram of the present invention;

[0029] Figure 4 It is a process control flow chart of the present invention;

[0030] Figure 5 This is a fault alarm control flow chart of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below for illustration.

[0033] Example

[0034] See also Figure 1This embodiment provides a safety warning device for laser processing, including a laser 1, an indicator light 2, a beam combiner 3, a controller, an intermediate relay KA1, an intermediate relay KA2, an intermediate relay KA3 and a DC 24V power supply. The laser 1 is used to emit invisible laser light, the indicator light 2 is used to emit indicator light, and the beam combiner 3 is arranged between the optical output port of the laser 1 and the optical output port of the indicator light 2, and is used to combine the invisible laser light with the indicator light. The beam combiner 3 can penetrate the invisible laser light and reflect the indicator light, and the paths of the invisible laser light and the indicator light are overlapped by installing at a 45° angle.

[0035] Its control principle is as follows Figure 3 As shown, the laser has a laser light signal input port and a laser alarm signal output port, the indicator light has a positive input terminal and a negative input terminal, and the controller has an indicator light control output port, a laser light control output port and a laser alarm signal input port; one end of the intermediate relay KA1 coil is connected to the positive pole of the DC 24V power supply, and the other end of the intermediate relay KA1 coil is connected to the indicator light control output port of the controller, one end of the normally open contact of the intermediate relay KA1 is connected to the positive pole of the DC 24V power supply, and the other end of the normally open contact of the intermediate relay KA1 is connected to the positive input terminal of the indicator light, and the negative input terminal of the indicator light is connected to the negative pole of the DC 24V power supply; the intermediate relay K One end of the A2 coil is connected to the positive pole of the DC 24V power supply, the other end of the intermediate relay KA2 coil is connected to the laser light control output port of the controller, one end of the normally open contact of the intermediate relay KA2 is connected to the negative pole of the DC 24V power supply, and the other end of the normally open contact of the intermediate relay KA2 is connected to the laser light signal input port of the laser; one end of the intermediate relay KA3 coil is connected to the positive pole of the DC 24V power supply, the other end of the intermediate relay KA3 coil is connected to the laser alarm signal output port of the laser, one end of the normally open contact of the intermediate relay KA3 is connected to the negative pole of the power supply, and the other end of the normally open contact of the intermediate relay KA3 is connected to the laser alarm signal input port of the controller.

[0036] like Figure 4As shown, the control process includes: when the workpiece is placed at the processing position, the laser processing is started. After the controller receives the start signal, it outputs the laser light control signal and the indicator light control signal (a low-level signal) respectively. When the controller outputs the laser light control signal, it triggers the intermediate relay KA2 coil to be energized, and the normally open contact of the intermediate relay KA2 is closed. The laser receives the laser light signal and emits an invisible laser. When the controller outputs the indicator light control signal, it triggers the intermediate relay KA1 coil to be energized, and the normally open contact of the intermediate relay KA1 is closed. The indicator light is energized to emit an indicator light. Then, the invisible laser and the indicator light are combined under the action of the beam combiner and then act on the surface of the workpiece. Although the operator cannot see the invisible laser at this time, he can know the current processing position and trajectory of the laser under the guidance of the indicator light, which facilitates the operator to pick up and place the workpiece.

[0037] like Figure 5 As shown, when an abnormal error occurs in the laser, the laser will output a laser alarm signal (a low-level signal), triggering the intermediate relay KA3 coil to energize, and the normally open contact of the intermediate relay KA3 to close. After receiving the laser alarm signal, the controller will output an indicator light control signal to control the indicator light to flash. When the operator sees the indicator light flashing, he can determine that the current laser is in a fault alarm state, which can remind the operator to repair the laser in time.

[0038] Abnormal laser misalignment can be divided into one or more types. When the laser abnormal error is one type, the controller controls the indicator light to flash at a fixed cycle time; when the laser abnormal error is multiple types, the controller controls the indicator light to flash at different cycle times. The operator determines the corresponding fault content according to the flashing frequency of the indicator light and performs maintenance according to different fault contents.

[0039] See also Figure 2 In another embodiment, a scanning galvanometer 4 is further included. The scanning galvanometer 4 is arranged on the beam combining optical path of the beam combining mirror 3. The scanning galvanometer 4 can change the optical path transmission direction by controlling the rotational movement of the lens therein to realize the movement of the graphic processing trajectory. According to the needs, the indicator light can be used to perform contour positioning of the processing workpiece before laser processing. The indicator light 2 emits an indicator light which is reflected by the beam combining mirror 3 and enters the lens in the scanning galvanometer 4. The controller generates the motion trajectory of the graphics to be processed by controlling the lens of the scanning galvanometer 4 to move at a high speed. The indicator light follows the high-speed movement of the lens to form a visible contour on the surface of the processing workpiece. The operator can position the processing workpiece according to the contour indication, thereby improving the product processing accuracy.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety warning device for laser processing, characterized in that: It includes laser, indicator light, beam combiner, controller, intermediate relay KA1, intermediate relay KA2, intermediate relay KA3 and power supply; The laser is used to emit invisible laser light, the indicator light is used to emit indicator light, and the beam combiner is arranged between the light output port of the laser and the light output port of the indicator light, and is used to combine the invisible laser light and the indicator light; The laser has a laser light output signal input port and a laser alarm signal output port, the indicator light has a positive input terminal and a negative input terminal, and the controller has an indicator light control output port, a laser light output control output port and a laser alarm signal input port; One end of the intermediate relay KA1 coil is connected to the positive pole of the power supply, the other end of the intermediate relay KA1 coil is connected to the indicator light control output port of the controller, one end of the normally open contact of the intermediate relay KA1 is connected to the positive pole of the power supply, the other end of the normally open contact of the intermediate relay KA1 is connected to the positive input end of the indicator light, and the negative input end of the indicator light is connected to the negative pole of the power supply; One end of the intermediate relay KA2 coil is connected to the positive pole of the power supply, the other end of the intermediate relay KA2 coil is connected to the laser light control output port of the controller, one end of the normally open contact of the intermediate relay KA2 is connected to the negative pole of the power supply, and the other end of the normally open contact of the intermediate relay KA2 is connected to the laser light signal input port of the laser; One end of the intermediate relay KA3 coil is connected to the positive pole of the power supply, the other end of the intermediate relay KA3 coil is connected to the laser alarm signal output port of the laser, one end of the normally open contact of the intermediate relay KA3 is connected to the negative pole of the power supply, and the other end of the normally open contact of the intermediate relay KA3 is connected to the laser alarm signal input port of the controller.

2. A safety warning device for laser processing according to claim 1, characterized in that: The beam combining mirror can penetrate the invisible laser and reflect the indicator light, and the paths of the invisible laser and the indicator light are overlapped by installing at a 45° angle.

3. A safety warning device for laser processing according to claim 1, characterized in that: A scanning galvanometer is also provided on the beam combining optical path of the beam combining mirror, and the scanning galvanometer can change the transmission direction of the optical path by controlling the rotational movement of the lens inside the scanning galvanometer.

4. The safety warning device for laser processing according to claim 1, characterized in that: The power supply is a DC 24V power supply.

5. A control method for a safety warning device for laser processing according to any one of claims 1 to 4, characterized in that: include: Start the laser processing. After receiving the start signal, the controller outputs the laser light control signal and the indicator light control signal respectively; When the controller outputs the laser light control signal, it triggers the intermediate relay KA2 coil to close, the normally open contact of the intermediate relay KA2 closes, and the laser receives the laser light signal and emits invisible laser; When the controller outputs the indicator light control signal, it triggers the intermediate relay KA1 coil to close, the normally open contact of the intermediate relay KA1 closes, and the indicator light is energized to emit an indication light; Then the invisible laser and the indicator light are combined together by the beam combiner and then act on the surface of the workpiece.

6. The control method of the safety warning device for laser processing according to claim 5, characterized in that: When an abnormal error occurs in the laser, the laser will output a laser alarm signal, triggering the intermediate relay KA3 coil to energize, and the normally open contact of the intermediate relay KA3 will close. After receiving the laser alarm signal, the controller will output an indicator light control signal to control the indicator light to flash.

7. The control method of the safety warning device for laser processing according to claim 6, characterized in that: When the laser abnormality error is one, the controller controls the indicator light to flash at a fixed cycle time.

8. The control method of the safety warning device for laser processing according to claim 6, characterized in that: When there are multiple abnormal errors of the laser, the controller controls the indicator light to flash at different cycle times.

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