Dust extraction control method, system and laser cutting machine

Abstract

The present invention discloses a dust extraction control method, system, and laser cutting machine. The dust extraction control method includes the following steps: determining the workpiece conveying status in a conveying channel; and controlling the dust extraction status of a first dust extraction fan and a second dust extraction fan based on the determined workpiece conveying status. The technical solution of the present invention aims to improve the dust extraction control accuracy of the laser cutting machine, enhance the dust extraction effect, and reduce energy consumption.

Description

Technical Field

[0001] The present invention relates to the field of laser cutting technology, and in particular to a dust extraction control method and system and a laser cutting machine. Background Art

[0002] Laser cutting boasts high cutting accuracy, enabling high-precision, high-efficiency cutting of products. It has been widely used in the automotive, machinery, aerospace, and other fields. However, when cutting workpieces, a large amount of smoke and dust is generated, which permeates the entire laser cutting machine's workspace. This not only pollutes the laser cutting machine's environment but also affects the cutting accuracy of the workpiece. Therefore, laser cutting machines are often equipped with dust extraction systems for dust removal. However, existing dust extraction systems require manual control, resulting in inaccurate and ineffective dust extraction, as well as excessive energy consumption. Summary of the Invention

[0003] The main purpose of the present invention is to provide a dust extraction control method, system and laser cutting machine, aiming to improve the dust extraction control accuracy of the laser cutting machine, improve the dust extraction effect and reduce energy consumption.

[0004] To achieve the above objectives, the dust extraction control method proposed in the present invention comprises the following steps:

[0005] Determine the conveying status of the workpiece in the conveying flow channel;

[0006] According to the determined workpiece conveying state, the dust extraction states of the first dust extraction fan and the second dust extraction fan are controlled respectively.

[0007] In one embodiment of the present invention, before the step of determining the conveying state of the workpiece in the conveying channel, the method further includes:

[0008] Detect whether the conveying flow channel is started. After the conveying flow channel is started, detect the inflow status of the workpiece in real time.

[0009] In one embodiment of the present invention, the further embodiment includes: when it is detected for the first time that a workpiece flows into the feed end of the conveying channel, controlling the first dust extraction fan and the second dust extraction fan to start.

[0010] In one embodiment of the present invention, the step of controlling the dust extraction states of the first dust extraction fan and the second dust extraction fan respectively according to the determined workpiece conveying state further includes:

[0011] After detecting that a workpiece flows into the feed end of the conveying flow channel for the first time, detecting whether the workpiece continues to flow into the feed end of the conveying flow channel;

[0012] When it is detected that the workpiece is continuously flowing into the feed end of the conveying channel, the interval time between the current workpiece flowing in and the feed end of the previous workpiece flowing into the conveying channel is determined, and the interval time is compared with the preset time. According to the comparison result between the interval time and the preset time, the dust extraction status of the first dust extraction fan and the second dust extraction fan are controlled respectively.

[0013] In one embodiment of the present invention, the step of controlling the dust extraction states of the first dust extraction fan and the second dust extraction fan respectively according to the comparison result between the interval time and the preset time further includes:

[0014] When the interval time is less than the first preset time, the first dust extraction fan and the second dust extraction fan are controlled to extract dust at a high speed;

[0015] When the interval time is between the first preset time and the second preset time, the first dust extraction fan is controlled to extract dust at a high speed, and the second dust extraction fan is controlled to extract dust at a low speed;

[0016] When the interval time is greater than the second preset time, the first dust extraction fan is controlled to extract dust at a low speed, and the second dust extraction fan is controlled to be turned off.

[0017] In one embodiment of the present invention, after detecting that a workpiece flows into the feed end of the conveying channel, if no workpiece is detected flowing in after a third preset time, the first dust extraction fan and the second dust extraction fan are controlled to be turned off.

[0018] The present invention also provides a dust extraction control system, which applies the dust extraction control method, and includes:

[0019] a first dust extraction fan and a second dust extraction fan;

[0020] A conveying channel, wherein the conveying channel is used to convey the workpiece;

[0021] A detection module, the detection module is used to detect the conveying status of the workpiece in the conveying channel;

[0022] A control module is connected to the detection module, the first dust extraction fan and the second dust extraction fan.

[0023] In one embodiment of the present invention, the detection module is further used to detect the dust extraction status of the first dust extraction fan and the second dust extraction fan.

[0024] In one embodiment of the present invention, the first dust extraction fan and the second dust extraction fan are respectively located above and below the conveying flow channel.

[0025] The present invention also provides a laser cutting machine, which includes the dust extraction control system.

[0026] In the technical solution of the present invention, the dust extraction control method can control the dust extraction fan in the laser cutting machine according to the conveying status of the workpiece in the conveying channel. By determining the different conveying states of the workpiece in the conveying channel, the dust extraction status of the first dust extraction fan and the second dust extraction fan are controlled separately, thereby achieving precise automatic control of the dust extraction fans, improving control accuracy and reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0028] Figure 1 This is a structural diagram of an embodiment of a dust extraction control method of the present invention;

[0029] Figure 2 This is a structural diagram of an embodiment of a dust extraction control method of the present invention;

[0030] Figure 3 A schematic structural diagram of another embodiment of the dust extraction control method of the present invention;

[0031] Figure 4 This is a structural schematic diagram of another embodiment of the dust extraction control method of the present invention;

[0032] Figure 5 This is a structural block diagram of the dust extraction control system of the present invention;

[0033] Figure 6 Schematic diagram of the structure of the laser cutting machine of the present invention.

[0034] Description of Figure Numbers:

[0035]

[0036] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] The embodiment of the present invention relates to a laser cutting machine 200, which includes a machine platform, a conveying channel 10 provided on the machine platform, a laser head 210, a first dust extraction fan 21, a second dust extraction fan 23, a detection module 30, and a control module 40. The control module 40 is connected to the first dust extraction fan 21, the second dust extraction fan 23, and the detection module 30 via signals. The control module 40 receives the detection signal output by the detection module 30 and controls the first dust extraction fan 21 and the second dust extraction fan 23 according to the detected signal.

[0042] The dust extraction control method proposed by the present invention comprises the following steps:

[0043] S10: Determine the conveying state of the workpiece in the conveying channel 10;

[0044] S20: According to the determined workpiece conveying state, the dust extraction states of the first dust extraction fan 21 and the second dust extraction fan 23 are controlled respectively.

[0045] In step S10, determining the conveying status of the workpiece in the conveying channel 10 includes determining whether there is a workpiece flowing into the conveying channel 10, and also includes the conveying speed of the workpiece in the conveying channel 10, the number of workpieces in the channel, the interval time and interval distance in each workpiece channel, and other states.

[0046] In step S20, the first dust extraction fan 21 and the second dust extraction fan 23 are independently provided. It can be understood that the first dust extraction fan 21 is connected to the first branch pipeline, the second dust extraction fan 23 is connected to the second branch pipeline, and the first branch pipeline and the second branch pipeline are both connected to the dust exhaust main pipeline.

[0047] In this embodiment, the dust extraction status of the first dust extraction fan 21 and the second dust extraction fan 23 are controlled respectively according to the conveying status of the workpiece on the conveying channel 10. For example, the first dust extraction fan 21 and the second dust extraction fan 23 can be controlled to be turned on, turned off or to extract dust at different speeds at the same time, so as to realize automatic control of the first dust extraction fan 21 and the second dust extraction fan 23, improve the dust extraction status control accuracy of the first dust extraction fan 21 and the second dust extraction fan 23, and reduce energy loss.

[0048] In the technical solution of the present invention, the dust extraction control method can control the dust extraction fan in the laser cutting machine 200 according to the conveying state of the workpiece in the conveying channel 10. By determining the different conveying states of the workpiece in the conveying channel, the dust extraction states of the first dust extraction fan 21 and the second dust extraction fan 23 are controlled respectively, thereby achieving precise automatic control of the dust extraction fans, improving control accuracy and reducing energy loss.

[0049] Reference Figure 2 In one embodiment of the present invention, before the step of determining the conveying state of the workpiece in the conveying channel 10 in step S10, the method further includes:

[0050] S30: Detecting whether the conveying channel 10 is started. After the conveying channel 10 is started, detecting the inflow state of the workpiece in real time.

[0051] In step S30, the start-up state of the conveying channel 10 is determined in order to further determine the conveying state of the workpiece on the conveying channel 10. It should be noted that when the conveying channel 10 is in an unstarted state, a workpiece may remain at a specific position of the conveying channel 10. The specific position here includes the detection position of the incoming material sensor, etc. At this time, it will cause the incoming material sensor to misjudge, thereby providing an erroneous judgment signal, affecting the subsequent control of the dust extraction fan. Therefore, in order to avoid misjudgment, the state of the conveying channel 10 is also detected to provide a reliable judgment basis for the subsequent control of the first dust extraction fan 21 and the second dust extraction fan 23. After the conveying channel 10 is started, the inflow state of the workpiece is detected in real time. By detecting the inflow state of the workpiece in real time, a more accurate and reliable judgment basis can be provided for the subsequent control of the first dust extraction fan 21 and the second dust extraction fan 23, thereby improving the control accuracy of the first dust extraction fan 21 and the second dust extraction fan 23 and improving the dust extraction effect.

[0052] Please continue to refer to Figure 2 In one embodiment of the present invention, the method further includes:

[0053] S50: When it is detected for the first time that a workpiece flows into the feeding end of the conveying channel 10, the first dust extraction fan 21 and the second dust extraction fan 23 are controlled to start.

[0054] In step S40, after the start of the conveying channel 10 is detected, the workpiece can continue to flow through the conveying channel 10 uninterruptedly to the bottom of the laser head 210 for cutting processing. In order to ensure that the smoke and dust generated during laser cutting can be discharged in time, the first dust extraction fan 21 and the second dust extraction fan 23 are started when the workpiece is detected to flow into the feed end of the conveying channel 10. It can be understood that the time required for the workpiece to be transported from the feed end of the conveying channel 10 to the bottom of the laser head 210 can meet the time required for the first dust extraction fan 21 and the second dust extraction fan 23 to start from high speed dust extraction. Therefore, before the workpiece is cut, the first dust extraction fan 21 and the second dust extraction fan 23 are ready to extract dust. In this way, when the workpiece is cut, it can be ensured that the dust extraction control system 100 has a good dust extraction effect. In the solution of the embodiment of the invention, the first dust extraction fan 21 and the second dust extraction fan 23 will not be started too early, resulting in excessive energy consumption, nor will the dust extraction effect be affected due to the untimely start-up of the first dust extraction fan 21 and the second dust extraction fan 23.

[0055] It should be noted that after the conveying channel 10 is started and before the workpiece is first detected flowing into the feed end of the conveying channel 10, the status of the first dust extraction fan 21 and the second dust extraction fan 23 can also be determined. If the first dust extraction fan 21 and the second dust extraction fan 23 are both already in the turned-on state, there is no need to control the first dust extraction fan 21 and the second dust extraction fan 23 to be turned on when the workpiece is first detected flowing into the feed end of the conveying channel 10.

[0056] Please refer to Figure 3 In one embodiment of the present invention, in step S20, the step of controlling the dust extraction states of the first dust extraction fan 21 and the second dust extraction fan 23 according to the determined workpiece conveying state, further comprising:

[0057] S21: After detecting that a workpiece flows into the feed end of the conveying channel 10 for the first time, detecting whether the workpiece continues to flow into the feed end of the conveying channel 10;

[0058] S23: When it is detected that the workpiece is continuously flowing into the feed end of the conveying channel 10, the interval time between the current workpiece flowing in and the previous workpiece flowing into the feed end of the conveying channel 10 is determined, and the interval time is compared with the preset time. According to the comparison result between the interval time and the preset time, the dust extraction status of the first dust extraction fan 21 and the second dust extraction fan 23 are controlled respectively.

[0059] In an embodiment of the present invention, in step S21, after the workpiece is first detected to have flowed into the feed end of the conveying channel 10, situations such as workpiece interruption may occur. Therefore, by detecting whether the workpiece continues to flow into the feed end of the conveying channel 10, a basis is provided for controlling the dust extraction states of the first dust extraction fan 21 and the second dust extraction fan 23 respectively. In this step, whether the workpiece is continuously flowing in can be determined by judging the number of workpieces flowing into the feed end of the conveying channel 10 within a preset time. For example, if 6 workpieces flow through the feed end of the conveying channel 10 continuously within 1 minute; or, if 2 to 3 workpieces flow through the feed end of the conveying channel 10 within 30S, it can be determined that the workpiece is in a state of continuous inflow. Usually, if two workpieces flow into the feed end of the conveying channel 10 of the workpiece continuously within a preset time, it can be determined that the workpiece is in a state of continuous inflow. In another embodiment, when determining whether the workpiece is flowing in continuously, sensors can be provided at the feed end of the conveying channel 10 and at a position at a preset distance from the feed section. When the two sensors simultaneously detect incoming signals of the workpiece, it can also be determined that the workpiece is in a state of continuous inflow.

[0060] In step S23, when the workpieces are continuously flowing in, the interval between the current inflow of workpieces and the previous inflow of workpieces is also determined, and the interval time is compared with the preset time. The comparison result is used as a basis for controlling the dust extraction status of the first dust extraction fan 21 and the second dust extraction fan 23, thereby improving the flexibility of controlling the first dust extraction fan 21 and the second dust extraction fan 23. In one embodiment of the present invention, the interval time can be a signal detected by the same sensor when two workpieces are incoming; or the interval time can also be the length of time that the sensor does not detect the incoming workpieces.

[0061] Please refer to Figure 4 In one embodiment of the present invention, in step S23, the step of controlling the dust extraction states of the first dust extraction fan 21 and the second dust extraction fan 23 respectively according to the comparison result between the interval time and the preset time further includes:

[0062] S231: When the interval time is less than the first preset time, the first dust extraction fan 21 and the second dust extraction fan 23 are controlled to extract dust at a high speed;

[0063] S232: When the interval time is between the first preset time and the second preset time, the first dust extraction fan 21 is controlled to extract dust at a high speed, and the second dust extraction fan 23 is controlled to extract dust at a low speed;

[0064] S233: When the interval time is greater than the second preset time, the first dust extraction fan 21 is controlled to extract dust at a low speed, and the second dust extraction fan 23 is controlled to be turned off.

[0065] In step S23 , if the first preset time is 10 seconds, the second preset time is 20 seconds.

[0066] When it is detected that the interval time between the currently flowing workpiece and the previously flowing workpiece is 8S, the interval time is smaller than the first preset time 10S. At this time, the conveying channel 10 and the laser head 210 in the laser cutting machine 200 are both in a relatively busy state. At this time, the control of the first dust extraction fan 21 and the second dust extraction fan 23 in step S231 is executed to extract dust at high speed to ensure the dust extraction effect.

[0067] When it is detected that the interval time between the currently flowing workpiece and the previously flowing workpiece is 15S, at this time, the interval time is greater than the first preset time and smaller than the second preset time. At this time, the conveying channel 10 and the laser head 210 in the laser cutting machine 200 are not in an overly busy state. At this time, the amount of smoke and dust generated is not large. At this time, execute step S232 to control the first dust extraction fan 21 to extract dust at high speed, and control the second dust extraction fan 23 to extract dust at low speed. This can also achieve better dust extraction effect while reducing energy consumption.

[0068] When it is detected that the interval time between the currently flowing workpiece and the previously flowing workpiece is 30S, at this time, the conveying channel 10 and the laser head 210 in the laser cutting machine 200 are both in a relatively idle state. In a relatively idle state, only one dust extraction fan is needed to work at a low speed to clean the smoke and dust. At this time, execute step S233 to control the first dust extraction fan 21 to extract dust at a low speed, and control the second dust extraction fan 23 to be turned off to reduce energy consumption.

[0069] It should be noted that the first preset time and the second preset time can be reasonably set according to the cutting cycle of each workpiece, and the 10S and 20S mentioned above are not limited to the scope of this embodiment.

[0070] Please continue to refer to Figure 3 In one embodiment of the present invention, in step S25, after detecting that a workpiece flows into the feed end of the conveying channel 10, if no workpiece is detected flowing in after a third preset time, the first dust extraction fan 21 and the second dust extraction fan 23 are controlled to be turned off.

[0071] In this embodiment, when it is first detected that a workpiece flows into the feed end of the conveying channel 10, if no workpiece is detected flowing in within the third preset time, the third preset time can be 50S, 60S, or other time that is longer than the second preset time. The sensor starts to count the interval time every time it detects that a workpiece flows into the feed end of the conveying channel 10. When the interval time reaches the third preset time, at this time, the cutting of all workpieces may have been completed, and the conveying channel 10 and the laser head 210 in the laser cutting machine 200 are both in an idle state. At this time, the control of the first dust extraction fan 21 and the second dust extraction fan 23 in step S25 is executed to turn off to further save energy consumption.

[0072] Please refer to Figure 5 The present invention further provides a dust extraction control system 100, wherein the dust extraction control system 100 applies the dust extraction control method, and the dust extraction control system 100 includes:

[0073] A first dust extraction fan 21 and a second dust extraction fan 23; a conveying channel 10, the conveying channel 10 is used to convey the workpiece; a detection module 30, the detection module 30 is used to detect the conveying status of the workpiece in the conveying channel 10; a control module 40, the control module 40 is connected to the detection module 30, the first dust extraction fan 21 and the second dust extraction fan 23.

[0074] In one embodiment of the present invention, the dust extraction control system 100 applies the above-mentioned dust extraction control method. The specific structure of the dust extraction control method refers to the above-mentioned embodiment. Since the dust extraction control system 100 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0075] Among them, the dust extraction control system includes a first dust extraction fan 21 and a second dust extraction fan 23, the first dust extraction fan 21 and the second dust extraction fan 23 are respectively located above and below the conveying channel 10, and the first dust extraction fan 21 is connected to the first dust collection hood through a pipeline, and the second dust extraction fan 23 is also connected to the second dust collection hood through a pipeline. The dust collection ports of the first dust collection hood and the second dust collection hood are both arranged toward the cutting station in the conveying channel 10, so that the dust collection effect can be improved. The conveying channel 10 is used to convey workpieces, and the structure of the conveying channel 10 can be a belt conveyor, a chain conveyor, etc. The detection module 30 includes an incoming material sensor, a timer, and a counter, etc. The detection module 30 is used to detect the conveying status of the workpiece in the conveying channel 10. Of course, the detection device also includes detecting the status of the first dust extraction fan 21 and the second dust extraction fan 23, etc. The detection device can also detect the conveying status of the conveying channel 10. The present invention also proposes a laser cutting machine 200, which is connected to the above-mentioned dust extraction control system 100. The specific structure of the dust extraction control system 100 refers to the above-mentioned embodiment. Since the laser cutting machine 200 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0076] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dust extraction control method, applied to a laser cutting machine, characterized in that: The laser cutting machine includes a conveying flow channel and a first dust extraction fan and a second dust extraction fan respectively located above and below the conveying flow channel. The dust extraction control method includes the following steps: Detect whether the conveying flow channel is started. After the conveying flow channel is started, detect the inflow status of the workpiece in real time; When it is detected for the first time that a workpiece flows into the feed end of the conveying channel, the first dust extraction fan and the second dust extraction fan are controlled to start; After detecting that a workpiece flows into the feed end of the conveying flow channel for the first time, detecting whether the workpiece continues to flow into the feed end of the conveying flow channel; When it is detected that the workpiece continuously flows into the feed end of the conveying flow channel, the interval time between the current workpiece flowing in and the previous workpiece flowing into the feed end of the conveying flow channel is determined, and the interval time is compared with the preset time; According to the comparison result between the interval time and the preset time, the dust extraction states of the first dust extraction fan and the second dust extraction fan are controlled respectively; When the interval time is less than the first preset time, the first dust extraction fan and the second dust extraction fan are controlled to extract dust at a high speed; When the interval time is between the first preset time and the second preset time, the first dust extraction fan is controlled to extract dust at a high speed, and the second dust extraction fan is controlled to extract dust at a low speed; When the interval time is greater than the second preset time, the first dust extraction fan is controlled to extract dust at a low speed, and the second dust extraction fan is controlled to be turned off.

2. The dust extraction control method according to claim 1, wherein: After detecting that a workpiece flows into the feed end of the conveying channel, if no workpiece is detected flowing in after a third preset time, the first dust extraction fan and the second dust extraction fan are controlled to be turned off.

3. A dust extraction control system, characterized in that: The dust extraction control system applies the dust extraction control method according to one of claims 1 or 2, and the dust extraction control system includes: a first dust extraction fan and a second dust extraction fan; A conveying channel, wherein the conveying channel is used to convey the workpiece; A detection module, the detection module is used to detect the conveying status of the workpiece in the conveying channel; A control module is connected to the detection module, the first dust extraction fan and the second dust extraction fan.

4. The dust extraction control system according to claim 3, characterized in that: The detection module is further used to detect the dust extraction status of the first dust extraction fan and the second dust extraction fan.

5. The dust extraction control system according to claim 3, characterized in that: The first dust extraction fan and the second dust extraction fan are respectively located above and below the conveying flow channel.

6. A laser cutting machine, comprising the dust extraction control system according to any one of claims 3 to 5.

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