A laser cutting dust extraction system, a laser cutting machine and a dust extraction method thereof

Abstract

The application is a kind of laser cutting exhaust dust removal system, laser cutting machine and its dust removal method, belonging to the field of laser processing. Its technical scheme is that the laser cutting exhaust dust removal system comprises a duct device and a control device: the duct device comprises a duct main body, a plurality of exhaust openings are opened along the length direction of the duct main body, and a valve assembly is installed in the exhaust opening; the control device comprises a trigger assembly and a sensing assembly, the sensing assembly is in a strip structure, the sensing assembly comprises a conductive moving element, a first conductor is arranged below the conductive moving element, the first conductor is in conductive contact with the conductive moving element, a second conductor is arranged above the conductive moving element, and the second conductor is spaced apart from the conductive moving element by a certain distance; and the trigger assembly comprises a magnetic attraction element. When the trigger assembly moves to the end area of the sensing assembly, the trigger assembly generates attraction to the adjacent sensing assembly, thereby effectively removing the diffused smoke dust; the sensing assembly adopts a magnetic attraction conduction form, which greatly reduces the occupation of the board card interface.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser processing, in particular to a laser cutting exhaust dust removal system, a laser cutting machine and a dust removal method of the laser cutting machine. BACKGROUND

[0002] The laser cutting technology processes materials through high-energy laser beams for melting or vaporization, which is accompanied by intense physical and chemical reactions: the combustion and evaporation of materials at high temperatures will produce a large amount of smoke dust particles (such as metal oxide powder), metal vapor and harmful gases, etc. On the one hand, fine smoke dust particles can be inhaled into the lungs, and long-term exposure may cause respiratory diseases; harmful gases are irritating or toxic, which are harmful to human health; on the other hand, smoke dust adheres to key components such as cutting heads, guide rails and optical lenses, which will reduce the focusing accuracy of the laser beam and affect the smoothness of mechanical movement, resulting in reduced processing precision and shortened equipment life. Therefore, laser cutting equipment is usually equipped with an exhaust dust removal device.

[0003] With the increasing of the width of the laser cutting machine, the overall exhaust scheme is difficult to support the exhaust demand of a larger width, and the current exhaust dust removal scheme adopts a partitioned dust removal, specifically, the bed surface is divided into multiple areas, and a damper is arranged in each area, and the dampers are connected to an exhaust air duct, then a position detection device is installed on the cutting machine beam to detect the position of the beam in real time, and the damper of the corresponding area is opened, and the dampers of other positions are in a closed state, and then the air volume and dust removal efficiency of the exhaust air duct are concentrated in the current area.

[0004] However, when the cutting head cuts at the edge position of a certain interval, due to the diffusion effect of smoke dust, part of the smoke dust will diffuse to the adjacent interval, and this part of the diffused smoke dust is difficult to be effectively treated; at the same time, for a large-width laser cutting machine, a large number of areas are divided, and an equal number of IO output points, electromagnetic valves and signal lines are required, and each area requires an independent IO output point, which occupies a large number of IO resources of the system board, limiting the expansion ability of the equipment. The length of the signal line is accumulated with the increase of the number of intervals, the material cost is high, the signal line needs to be connected one by one with the IO output point and the electromagnetic valve, the wiring process of the large-width equipment is complex, and a large number of working hours of installation workers are occupied; in the later maintenance, the fault diagnosis difficulty of multiple lines is also significantly improved. SUMMARY

[0005] The present application provides a laser cutting exhaust dust removal system, a laser cutting machine and a dust removal method thereof, which solves the problems that the current laser cutting machine exhaust dust removal scheme is difficult to handle the edge diffusion of smoke dust and occupies a large number of ports of the board.

[0006] To solve the above problems, in a first aspect, the application provides a laser cutting air extraction and dust removal system, comprising an air duct device and a control device: the air duct device comprises an air duct body, a plurality of air extraction openings are formed in the air duct body along the length direction, and a valve assembly is installed in the air extraction opening; the control device comprises a trigger assembly and an induction assembly corresponding to the number of valve assemblies: the induction assembly is in a strip structure, a plurality of induction assemblies are arranged in sequence end to end along the length direction of the air duct body, the induction assembly comprises a conducting moving part arranged along the length direction thereof, a first conductor is arranged below the conducting moving part, the first conductor is in conductive contact with the conducting moving part, a second conductor is arranged above the conducting moving part, the second conductor is spaced apart from the conducting moving part by a certain distance, and the first conductor and the second conductor are connected to the control circuit of the valve assembly and make the control circuit in a normally open state; the trigger assembly comprises a magnetic attraction piece, and the magnetic attraction piece is located above the induction assembly and can move along the length direction. The air extraction and dust removal system designed in the scheme is based on the idea of partitioned dust removal, the induction assembly is set to be magnetically attracted and triggered, the magnetic force of the trigger assembly can also attract the adjacent induction assembly when the trigger assembly moves to the end region of the induction assembly, thereby starting an adjacent air extraction and dust removal region in advance, and thereby effectively removing the diffused smoke dust. At the same time, the induction assembly adopts a magnetic attraction and conduction opening and closing connection form, without complex logic control, and greatly reduces the occupation of the board card interface.

[0007] As a preferred implementation scheme of the laser cutting air extraction and dust removal system, the conducting moving part comprises a horizontal spring and a plurality of vertical springs, the horizontal spring is arranged along the length direction of the induction assembly, the upper end of the vertical spring is connected with the outer peripheral surface of the horizontal spring, the lower end of the vertical spring is connected with the first conductor, and the second conductor is parallel to the horizontal spring and located above the horizontal spring. The horizontal spring provides a horizontal degree of freedom, can compensate for slight position deviation when the magnetic attraction piece moves, and ensures stable contact between the conducting moving part and the second conductor; the elastic expansion and contraction characteristics of the vertical spring ensure flexible lifting of the conducting moving part under the action of the magnetic force, and reduce the risk of contact failure. The elastic reset ability of the spring structure is strong, the magnetic attraction piece can be quickly separated from the second conductor after leaving, and timely closing of the valve assembly is realized.

[0008] As a preferred implementation scheme of the laser cutting air extraction and dust removal system, the induction assembly further comprises a sensor shell, the sensor shell is hollow inside, the first conductor and the bottom of the conducting moving part are both installed in the bottom surface of the inner cavity of the sensor shell, and the second conductor is located on the top surface of the inner cavity of the sensor shell. The shell provides physical protection for the internal components and prolongs the service life of the sensor; the closed environment reduces the interference of external factors on the conductive contact, and improves the system stability; the fixed layout of the conductors makes the movement path of the conducting moving part more stable, and ensures that the on / off actions of the first and second conductors are accurate and reliable.

[0009] As a preferred implementation scheme of the laser cutting exhaust dust removal system, the top surface of the sensor shell is an upward convex arc, and the second conductor is a cylindrical conductor located at the uppermost end of the arc. The guiding effect of the arc-shaped top surface improves the alignment accuracy of the moving conductor and the second conductor, reducing poor contact caused by positional deviation; the circular arc contact surface of the cylindrical second conductor increases the fault tolerance rate of the conductive contact, further ensuring the reliability of the conduction.

[0010] As a preferred implementation scheme of the laser cutting exhaust dust removal system, the valve assembly includes a plurality of flaps, the flaps are provided with a rotating shaft and are rotatably installed between the side walls of the exhaust port through the rotating shaft, one end of the rotating shaft penetrates the side wall of the exhaust port and is connected with a swing arm, the ends of the plurality of swing arms away from the rotating shaft are jointly hingedly installed on a connecting arm, a gas cylinder is also installed outside the side wall of the exhaust port, the gas cylinder rod end of the gas cylinder is provided with a driving arm, the driving arm is fixedly connected with one of the plurality of rotating shafts, the gas cylinder is connected with a damper electromagnetic valve through a gas circuit, and the damper electromagnetic valve is electrically connected with the sensing assembly. The linkage design of the plurality of flaps enlarges the opening area of the exhaust port and enhances the smoke exhaust efficiency; the cylinder driving response speed is fast, and the exhaust port can be quickly opened and closed in cooperation with the sensing assembly, timely following the position change of the cutting head, the mechanical linkage structure is simple and reliable, the maintenance cost is low, compared with the traditional single damper independent driving scheme, the number of driving components is reduced, and the equipment failure rate is reduced.

[0011] As a preferred implementation scheme of the laser cutting exhaust dust removal system, the control circuit includes a positive bus and a negative bus, a plurality of single-line branches are connected in parallel between the positive bus and the negative bus, a damper electromagnetic valve for controlling the valve assembly and a sensing assembly are arranged in series on the single-line branch, and the first conductor and the second conductor are connected with the positive bus and the negative bus through the single-line branch respectively. The bus type wiring only needs two main lines of the whole machine and the negative pole, which greatly reduces the number of signal lines, reduces the material cost and installation time, and reduces the line interference; the single-line branch independently controls the corresponding valve assembly, and the failure of a branch does not affect the work of other branches, improving the system fault tolerance and facilitating fault diagnosis.

[0012] In a second aspect, the present application provides a laser cutting machine, comprising a bed component and a cross beam capable of moving along the bed component, and further comprising the laser cutting dust extraction system described above, wherein the bed component comprises a left side bed and a right side bed, and a processing area is formed between the left side bed and the right side bed, the air duct body is arranged inside the left side bed and / or the right side bed, the air suction port is arranged towards the processing area, and one end of the air duct body is connected with an air suction fan; the induction assembly is installed outside the left side bed and / or the right side bed, and the magnetic attraction member is installed at the end of the cross beam and above the induction assembly through the magnetic attraction member support. The air duct is integrated inside the bed, does not occupy the processing space, and optimizes the equipment layout; the air suction port is arranged towards the processing area, shortens the smoke exhaust path, and improves the air suction efficiency; the double-side air suction design can cover a larger range of processing area, is particularly suitable for large-format cutting equipment, and avoids the smoke dust residue caused by single-side air suction.

[0013] As a preferred implementation scheme of the laser cutting machine, the air duct body is arranged in each of the left side bed and the right side bed, the induction assembly is installed outside each of the left side bed and the right side bed, and the magnetic attraction member is installed at both ends of the cross beam. The double-side synchronous air suction forms a symmetrical negative pressure field, enhances the capturing ability of the cutting area smoke dust, and reduces the outward diffusion of the smoke dust; for a wide processing area, the double-side coverage can avoid the smoke exhaust blind area of single-side air suction.

[0014] As a preferred implementation scheme of the laser cutting machine, a plurality of partitions are arranged between the left side bed and the right side bed, the partitions divide the processing area into a plurality of dust removal sub-zones, and a plurality of air suction ports are arranged in the plurality of dust removal sub-zones, respectively. The partition design enables the air suction energy to be concentrated in the current processing area, and the air volume is further concentrated; the partitions can block the free diffusion of smoke dust between the sub-zones, and cooperate with the precise opening of the air suction ports to improve the exhaust targeting.

[0015] In a third aspect, the dust removal method of the laser cutting machine described above comprises the following steps:

[0016] The cross beam drives the magnetic attraction member to move along the bed component, the magnetic attraction member attracts the conductive moving part in the induction assembly at the position of the current cross beam upwards, the first conductor and the second conductor are conductive, the valve assembly at the corresponding position is opened, and the air suction port at this position performs air suction and dust removal on the current processing area; when the cross beam moves to the boundary area of two adjacent induction assemblies, the magnetic attraction member simultaneously attracts the conductive moving parts in the two induction assemblies, two groups of valve assemblies corresponding to the two induction assemblies are simultaneously opened, and two air suction ports simultaneously perform air suction and dust removal on the current processing area. The double air suction ports in the boundary area are opened, solving the problem that in the traditional scheme, the smoke dust diffuses to the adjacent area during edge cutting and cannot be exhausted, and significantly improving the smoke exhaust effect; without software calculation of the cutting head position, the physical magnetic attraction is directly triggered, the response speed is fast, the control logic is simple, and the smoke exhaust failure caused by software delay or positioning error is reduced.

[0017] The above technical scheme can be seen that the advantages of the present application are that the magnetic attraction trigger sensing assembly is arranged end to end, which can start the adjacent exhaust area in advance when the trigger assembly moves to the end area, the double exhaust ports in the boundary area are opened synchronously, effectively solving the problem that the edge cutting smoke dust cannot be exhausted in the adjacent area in the traditional scheme, and the symmetric negative pressure field formed by the double-side exhaust, the partition design and the blocking effect of the partition plate significantly improve the smoke exhaust targeting and capture ability, avoid smoke residue and blind area; in terms of system stability and reliability, the spring structure of the conducting rotor provides two-way freedom, compensates for position deviation and ensures flexible lifting and rapid reset, the protection of the sensor shell reduces external interference, the arched top surface and the cylindrical conductor improve the alignment accuracy and fault tolerance rate of the conducting, the linkage design of the valve assembly and the cylinder drive ensure rapid response, and the overall reduces the risk of contact failure and equipment failure; in terms of cost and installation and maintenance, the magnetic attraction conducting form does not require complex logic control, reduces the occupation of board card interface, the bus type wiring greatly reduces the number of signal lines, reduces the material cost and installation time, the single-way branch line independent control improves the fault tolerance, facilitates fault troubleshooting, and the mechanical linkage structure also reduces the maintenance cost; in terms of equipment layout and adaptability, the air duct is integrated in the bed body without occupying the machining space, the double-side exhaust and the partition design are suitable for large-scale cutting equipment, and the overall layout of the equipment is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application, the drawings required to be used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structural schematic view of the embodiment of the present application.

[0020] Figure 2 It is a structural schematic view of the embodiment of the present application. Figure 1 It is a structural schematic view of the embodiment of the present application.

[0021] Figure 3 It is a structural schematic view of the sensing assembly in the embodiment of the present application.

[0022] Figure 4 It is a structural schematic view of the sensing assembly in the embodiment of the present application. Figure 3 It is a sectional view in A-A direction.

[0023] Figure 5 It is a sectional view in B-B direction. Figure 4 It is a sectional view in B-B direction.

[0024] Figure 6 It is a structural schematic view of the exhaust port assembly in the embodiment of the present application.

[0025] Figure 7 The electrical connection diagram of the dust extraction system in the specific embodiment of the present application.

[0026] Explanation of main reference signs

[0027] 1. air duct body, 2. air suction port, 3. valve assembly, 31. flap, 32. pivot shaft, 33. swing arm, 34. connecting arm, 35. air cylinder, 36. driving arm, 37. U-shaped seat, 38. pin shaft, 4. induction assembly, 41. sensor housing, 42. conductive rotor, 42-1. horizontal spring, 42-2. vertical spring, 43. first conductor, 44. second conductor, 45. pin, 5. trigger assembly, 51. magnetic attraction piece, 52. magnetic attraction piece bracket, 6. positive bus, 6-1. first positive bus branch, 6-2. second positive bus branch, 7. negative bus, 7-1. first negative bus branch, 7-2. second negative bus branch, 8. single branch, 9. damper electromagnetic valve, 10. bed body part, 10-1. left bed body, 10-2. right bed body, 10-3. partition, 11. cross beam, 12. board card, 13-1. relay, 13-2. switch. Specific embodiment

[0028] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the specific embodiments. Obviously, the embodiments described below are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present patent, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present patent.

[0029] Embodiment one

[0030] The present embodiment provides a laser cutting dust extraction system, comprising an air duct device and a control device:

[0031] As shown in Figure 1 , 6 , the air duct device comprises an air duct body 1, which is installed in the bed body part 10 of the laser cutting machine during installation and use, and the length direction of the air duct body 1 is the length direction of the bed body part 10 of the laser cutting machine.

[0032] The air duct body 1 is provided with a plurality of air suction openings 2 in the length direction, the air suction opening 2 is a rectangular air duct structure protruding to one side (i.e. the inner side of the bed body) on the side wall of the air duct body 1, a valve assembly 3 is installed in the air suction opening 2, the valve assembly 3 includes a plurality of flaps 31, a rotating shaft 32 is fixedly arranged on the flap 31 and is rotatably installed between the two side walls of the air suction opening 2 through the rotating shaft 32, in the closed state, the lower edge of the flap 31 is lapped on the upper edge of the adjacent flap 31 below, and the air suction opening 2 is closed together. One end of the rotating shaft 32 penetrates the side wall of the air suction opening 2 and is connected with a swing arm 33, the ends of a plurality of swing arms 33 away from the rotating shaft 32 are jointly hinged to a connecting arm 34, the swing arm 33 and the connecting arm 34 jointly constitute a planar linkage structure in the form of a parallelogram, a gas cylinder 35 is also installed outside the side wall of the air suction opening 2, a driving arm 36 is arranged at the end of the cylinder rod of the gas cylinder 35, the driving arm 36 is fixedly connected with one of the plurality of rotating shafts 32, specifically, a U-shaped seat 37 is arranged at the end of the cylinder rod, a pin shaft 38 is installed between the two side plates of the U-shaped seat 37, one end of the driving arm 36 is provided with a long hole, the pin shaft 38 penetrates the long hole, the other end of the driving arm 36 is fixedly connected with the end of the rotating shaft 32. When the gas cylinder 35 is elongated, the driving arm 36 is pushed to swing, the driving arm 36 drives the rotating shaft 32 to rotate, and then the flap 31 is opened, at the same time, the rotating shaft 32 drives the swing arm 33 to swing, and the connecting arm 34 drives the other swing arm 33 to swing, and then drives the other rotating shaft 32 to rotate, so that the plurality of flaps 31 are opened synchronously.

[0033] The control device includes a trigger assembly 5 and an induction assembly 4 corresponding to the number of valve assemblies 3, the gas cylinder 35 is connected with a damper electromagnetic valve 9 through a gas circuit, the damper electromagnetic valve 9 is electrically connected with the induction assembly 4:

[0034] As Figures 2-4As shown, the induction assembly 4 is a strip structure, a plurality of induction assemblies 4 are arranged in sequence along the length direction of the air duct body 1. The induction assembly 4 comprises a sensor shell 41, which is an internal hollow strip shell extending along the length direction of the air duct body 1 and is made of insulating material. The inside of the sensor shell 41 is provided with a conducting moving part 42 along the length direction thereof. A first conductor 43 is arranged below the conducting moving part 42 and is in conductive contact with the conducting moving part 42. A second conductor 44 is arranged above the conducting moving part 42 and is spaced apart from the conducting moving part 42 by a certain distance. The conducting moving part 42 comprises a horizontal spring 42-1 arranged along the length direction of the induction assembly 4 and a plurality of vertical springs 42-2. The upper end of the vertical spring 42-2 is connected to the outer circumferential surface of the horizontal spring 42-1, and the lower end of the vertical spring 42-2 is connected to the first conductor 43. The second conductor 44 is parallel to the horizontal spring 42-1 and is arranged above the horizontal spring 42-1 on the top surface of the internal cavity of the sensor shell 41. The top surface of the sensor shell 41 is convexly arched, and the second conductor 44 is a cylindrical conductor arranged at the uppermost end of the arch. Two pins 45 are arranged at one end of the sensor shell 41 and are connected to the first conductor 43 and the second conductor 44 respectively. The first conductor 43 and the second conductor 44 are connected to the control circuit of the valve assembly 3 and make the control circuit in a normally open state.

[0035] As shown in the drawings, Figure 2 The trigger assembly 5 comprises a magnetic attraction member 51 and a magnetic attraction member bracket 52. In use, the magnetic attraction member bracket 52 is mounted on the end of the cross beam 11 of the laser cutting machine, and the magnetic attraction member 51 is arranged above the induction assembly 4 and can move along the length direction of the induction assembly 4 (i.e. the length direction of the bed) following the movement of the cross beam 11.

[0036] The working principle of the control device is that the magnetic attraction member 51 is arranged above the induction assembly 4 and attracts the horizontal spring 42-1 by magnetic force, so that the horizontal spring 42-1 moves upward against the pulling force of the vertical spring 42-2. The horizontal spring 42-1 contacts the second conductor 44, and then the first conductor 43 and the second conductor 44 are connected, so that the controlled circuit is turned on.

[0037] Therefore, the control circuit of the dust removal system can be simplified. The positive bus 6 and the negative bus 7 are led out on the board card 12, and a plurality of single branch lines 8 are connected in parallel between the positive bus 6 and the negative bus 7. The air valve electromagnetic valve 9 for controlling the valve assembly 3 and the induction assembly 4 are arranged in series on the single branch line 8. The first conductor 43 and the second conductor 44 are connected to the positive bus 6 and the negative bus 7 through the single branch line 8, respectively. According to the above principle, the single branch line 8 is in a normally open state. When the magnetic attraction piece 51 attracts the horizontal spring 42-1 to move upward to connect the first conductor 43 and the second conductor 44, the single branch line 8 at the position is turned on, the air valve electromagnetic valve 9 is powered on, and then the valve assembly 3 is opened.

[0038] Figure 7 As shown in the middle, the air duct body 1 is arranged in the left bed body 10-1 and the right bed body 10-2 of the bed body part 10. Corresponding to the air duct body 1 on both sides, the positive bus 6 is branched into the first positive bus branch line 6-1 and the second positive bus branch line 6-2, and the negative bus 7 is branched into the first negative bus branch line 7-1 and the second negative bus branch line 7-2. The single branch line where the air valve electromagnetic valve 9 on both sides is connected between the first positive bus branch line 6-1 and the first negative bus branch line 7-1 and between the second positive bus branch line 6-2 and the second negative bus branch line 7-2, respectively. Lead wires are arranged at two ports of the board card 12 and connected to the positive bus 6. The relay 13-1 is arranged on the lead wire. The switch 13-2 is arranged on the first positive bus branch line 6-1 and the second positive bus branch line 6-2 and linked with the relay 13-1. The separate operation of the dust removal system on both sides can be controlled through the two groups of relays 13-1 and switches 13-2. It can be seen that the control circuit of the dust removal system only needs three ports at most.

[0039] Embodiment two

[0040] As Figure 1 、 2As shown, a laser cutting machine comprises a bed component 10 and a crossbeam 11 capable of moving along the bed component 10, and further comprises the laser cutting dust extraction system provided in embodiment one, the bed component 10 comprises a left side bed 10-1 and a right side bed 10-2, and a processing area is between the left side bed 10-1 and the right side bed 10-2, the air duct body 1 is arranged inside the left side bed 10-1 and / or the right side bed 10-2, the air suction port 2 is arranged towards the processing area, and one end of the air duct body 1 is connected with an air suction fan; the induction assembly 4 is installed outside the left side bed 10-1 and / or the right side bed 10-2, the magnetic attraction piece 51 is installed at the end of the crossbeam 11 and above the induction assembly 4 through the magnetic attraction piece support 52. A plurality of partitions 10-3 are arranged between the left side bed 10-1 and the right side bed 10-2, the partitions 10-3 divide the processing area into a plurality of dust extraction sub-zones, and a plurality of air suction ports 2 are respectively arranged in the plurality of dust extraction sub-zones. Further, as described in the last paragraph of embodiment one, the air duct body 1 can be arranged in the left side bed 10-1 and the right side bed 10-2, at the same time, the induction assembly 4 is installed outside the left side bed 10-1 and the right side bed 10-2, and the magnetic attraction piece 51 is installed at both ends of the crossbeam 11. The left side bed and the right side bed are both provided with the air duct body and the induction assembly, and the magnetic attraction piece is installed at both ends of the crossbeam, when the crossbeam moves, the magnetic attraction pieces at both ends trigger the left and right induction assemblies respectively, control the valve assembly on the corresponding side to open, and realize simultaneous air suction on the left and right sides of the processing area.

[0041] Embodiment three

[0042] The embodiment provides a dust extraction method for the laser cutting machine, comprising the following steps:

[0043] The crossbeam 11 moves along the preset processing track, the crossbeam 11 drives the magnetic attraction piece 51 to move along the bed component 10, in the moving process, the magnetic attraction piece 51 attracts the conductive moving piece 42 in the induction assembly 4 at the current position of the crossbeam 11 upwards, makes the transverse spring 42-1 move upwards, and contacts with the second conductor 44, the first conductor 43 and the second conductor 44 are conductive, the air door electromagnetic valve 9 is powered on, and then the valve assembly 3 at the corresponding position is opened, and the air suction port 2 at this position performs air suction and dust extraction on the current processing area;

[0044] When the crossbeam 11 moves to the boundary area of two adjacent induction assemblies 4, the magnetic attraction piece 51 simultaneously attracts the conductive moving pieces 42 in the two induction assemblies 4, and the two groups of valve assemblies 3 corresponding to the two induction assemblies 4 are simultaneously opened, and the two air suction ports 2 simultaneously perform air suction and dust extraction on the current processing area.

[0045] Compared with the existing partition dust removal method, the double suction ports in the boundary area are opened, the problem that smoke diffuses to the adjacent area and cannot be discharged in the edge cutting of the traditional scheme is solved, and the smoke exhaust effect is significantly improved; at the same time, the magnetic attraction trigger does not need to calculate the position of the cutting head through software, but directly triggers through physical magnetic attraction, the response speed is fast, the control logic is simple, and the smoke exhaust failure caused by software delay or positioning error is reduced.

[0046] As can be seen from the above embodiments, the beneficial effects of the present application are that the magnetic attraction trigger sensing assembly is arranged end to end, so that when the trigger assembly moves to the end area, the adjacent suction area can be started in advance, the double suction ports in the boundary area are opened synchronously, the problem that smoke diffuses to the adjacent area and cannot be discharged in the edge cutting of the traditional scheme is effectively solved, the symmetric negative pressure field formed by the double side suction, the blocking effect of the partition design and the partition, the smoke exhaust specificity and the capture ability are significantly improved, and the smoke residue and the blind area are avoided; in terms of system stability and reliability, the spring structure of the conducting armature provides two-way freedom, compensates for the position deviation, and ensures flexible lifting and quick reset, the protection of the sensor shell reduces external interference, the arched top surface and the cylindrical conductor improve the alignment accuracy and fault tolerance rate of the conducting, the linkage design of the valve assembly and the cylinder drive ensure quick response, and the overall reduces the risk of contact failure and equipment failure; in terms of cost and installation and maintenance, the magnetic attraction conducting form does not need complex logic control, reduces the occupation of board card interface, bus type wiring greatly reduces the number of signal lines, reduces the material cost and installation time, single line branch independent control improves fault tolerance, facilitates fault troubleshooting, and the mechanical linkage structure also reduces the maintenance cost; in terms of equipment layout and adaptability, the air duct is integrated in the bed body without occupying the machining space, the double side suction and the partition design are suitable for large area cutting equipment, and the overall layout of the equipment is optimized.

[0047] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser cutting fume extraction system, characterized in that, The application relates to a wind channel device and a control device. The wind channel device comprises a wind channel body (1) provided with a plurality of air suction openings (2) along the length direction, and a valve assembly (3) is arranged in the air suction opening (2). The control device comprises a trigger assembly (5) and a plurality of induction assemblies (4) corresponding to the number of the valve assemblies (3). The induction assembly (4) is in a strip-shaped structure, a plurality of induction assemblies (4) are arranged in sequence along the length direction of the wind channel body (1) and are connected end to end, the induction assembly (4) comprises a conducting moving element (42) arranged along the length direction, a first conductor (43) is arranged below the conducting moving element (42), the first conductor (43) is in conductive contact with the conducting moving element (42), a second conductor (44) is arranged above the conducting moving element (42), the second conductor (44) is spaced apart from the conducting moving element (42) by a certain distance, the first conductor (43) and the second conductor (44) are connected to the control circuit of the valve assembly (3) and make the control circuit in a normally open state. The trigger assembly (5) comprises a magnetic attraction element (51), the magnetic attraction element (51) is arranged above the induction assembly (4) and can run along the length direction.

2. The laser cutting fume extraction system of claim 1, wherein, The conducting moving element (42) comprises a horizontal spring (42-1) and a plurality of vertical springs (42-2), the horizontal spring (42-1) is arranged along the length direction of the induction assembly (4), the upper end of the vertical spring (42-2) is connected with the outer peripheral surface of the horizontal spring (42-1), the lower end of the vertical spring (42-2) is connected with the first conductor (43), and the second conductor (44) is parallel to the horizontal spring (42-1) and is arranged above the horizontal spring (42-1).

3. The laser cutting fume extraction system of claim 2, wherein, The induction assembly (4) further comprises a sensor shell (41), the sensor shell (41) is hollow inside, the first conductor (43) and the bottom of the conducting moving element (42) are both arranged on the bottom surface of the inner cavity of the sensor shell (41), and the second conductor (44) is arranged on the top surface of the inner cavity of the sensor shell (41).

4. The laser cutting fume extraction system of claim 3, wherein, The top surface of the sensor shell (41) is in an upward convex arc shape, and the second conductor (44) is a cylindrical conductor and is arranged at the uppermost end of the arc shape.

5. The laser cutting fume extraction system of claim 1, wherein, The valve assembly (3) comprises a plurality of flaps (31), the flaps (31) are provided with rotating shafts (32), the flaps (31) are rotatably arranged between the side walls of the air suction opening (2) through the rotating shafts (32), one end of the rotating shaft (32) penetrates through the side wall of the air suction opening (2) and is connected with a swing arm (33), the ends, away from the rotating shaft (32), of a plurality of the swing arms (33) are jointly hingedly arranged on a connecting arm (34), a cylinder (35) is further arranged outside the side wall of the air suction opening (2), a driving arm (36) is arranged at the end of the cylinder rod of the cylinder (35), the driving arm (36) is fixedly connected with one of the rotating shafts (32), the cylinder (35) is connected with a damper electromagnetic valve (9) through a gas path, and the damper electromagnetic valve (9) is electrically connected with the induction assembly (4).

6. The laser cutting fume extraction system of claim 5, wherein, The control circuit comprises a positive bus (6) and a negative bus (7), a plurality of single-branch lines (8) are connected in parallel between the positive bus (6) and the negative bus (7), a damper electromagnetic valve (9) for controlling a valve assembly (3) and an induction assembly (4) are arranged in series on the single-branch line (8), and the first conductor (43) and the second conductor (44) are connected with the positive bus (6) and the negative bus (7) through the single-branch line (8) respectively.

7. A laser cutting machine comprising a bed member (10) and a cross beam (11) movable along the bed member (10), characterized in that, The laser cutting dust extraction system also comprises the bed body part (10) comprising a left bed body (10-1) and a right bed body (10-2), the machining area is between the left bed body (10-1) and the right bed body (10-2), the air duct body (1) is arranged inside the left bed body (10-1) and / or the right bed body (10-2), the air suction port (2) is arranged towards the machining area, and one end of the air duct body (1) is connected with an air suction fan; the induction assembly (4) is installed outside the left bed body (10-1) and / or the right bed body (10-2), and the magnetic attraction member (51) is installed at the end of the cross beam (11) and above the induction assembly (4) through the magnetic attraction member support (52).

8. The laser cutting machine of claim 7, wherein, The left bed body (10-1) and the right bed body (10-2) are both provided with the air duct body (1), the left bed body (10-1) and the right bed body (10-2) are both provided with the induction assembly (4) outside, and the magnetic attraction member (51) is installed at both ends of the cross beam (11).

9. Laser cutting machine according to claim 7 or 8, characterized in that A plurality of partitions (10-3) are arranged between the left bed body (10-1) and the right bed body (10-2), the partitions (10-3) divide the machining area into a plurality of dust removal sub-zones, and a plurality of air suction ports (2) are arranged in the plurality of dust removal sub-zones respectively.

10. A method of dust extraction from a laser cutting machine as claimed in any one of claims 7 to 9, characterised in that, The following steps are included: The cross beam (11) drives the magnetic attraction member (51) to move along the bed body part (10), the magnetic attraction member (51) attracts the conductive moving element (42) in the induction assembly (4) at the position of the current cross beam (11) upwards, the first conductor (43) and the second conductor (44) are conductive, the valve assembly (3) at the corresponding position is opened, and the air suction port (2) at the position performs air suction and dust removal on the current machining area; When the cross beam (11) moves to the junction area of two adjacent induction assemblies (4), the magnetic attraction member (51) attracts the conductive moving elements (42) in the two induction assemblies (4) at the same time, two groups of valve assemblies (3) corresponding to the two induction assemblies (4) are opened at the same time, and two air suction ports (2) perform air suction and dust removal on the current machining area at the same time.

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