Air draft control mechanism and laser processing machine

Abstract

The utility model discloses an air draft control mechanism and a laser processing machine, the air draft control mechanism comprises a control system, a first relay and a second relay, the first control end of the control system is connected with the coil terminal of the first relay, and the second control end of the control system is connected with the coil terminal of the second relay. The normally-closed end of the first relay is connected with the first common end of the second relay, and the normally-open end of the first relay is connected with the second common end of the second relay, so that a first control circuit, a second control circuit, a third control circuit and a fourth control circuit are formed and correspond to four air draft areas on the machine tool respectively. In the machining process of the laser machining machine, the control system can control any one air draft area to conduct air draft action only through the control signals of the first control end and the second control end, other air draft areas do not conduct air draft, and the number of the control signals used for air draft control is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser processing, in particular to an exhaust control mechanism and a laser processing machine. Background Art

[0002] When cutting metal sheets and other parts, laser cutting machines will produce smoke, debris, welding slag, etc., which will pollute the relevant parts and workpieces on the machine and affect normal cutting. Therefore, laser cutting machines are usually equipped with exhaust and dust removal devices, such as setting a dust removal duct in the laser cutting machine bed, connecting the fan or dust collector to the dust removal duct, and setting multiple openable / closed exhaust zones on the laser cutting machine bed to exhaust and remove dust from different areas of the laser cutting machine bed.

[0003] However, as the width of the laser cutting machine bed increases, more and more exhaust areas are required. At the same time, the control system needs to add IO modules to provide output points to different exhaust areas to control the opening / closing of different exhaust areas, resulting in the need to add a large number of IO modules and cables to send exhaust control signals, occupying control system resources and machine tool electrical cabinet space. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the present application provides an exhaust control mechanism and a laser processing machine, which can reduce the number of control signals used for exhaust control.

[0005] This embodiment adopts the following technical solutions:

[0006] A draft control mechanism comprises a control system, a first relay and a second relay, wherein the second relay is a double-circuit relay, a first control end of the control system is connected to a coil connection end of the first relay, and a second control end of the control system is connected to a coil connection end of the second relay;

[0007] The common terminal and the normally closed terminal of the first relay, the first common terminal and the first normally closed terminal of the second relay are connected in sequence to form a first control circuit;

[0008] The common terminal and the normally closed terminal of the first relay, the first common terminal and the first normally open terminal of the second relay are connected in sequence to form a second control circuit;

[0009] The common terminal and the normally open terminal of the first relay, the second common terminal and the second normally closed terminal of the second relay are connected in sequence to form a third control circuit;

[0010] The common terminal and the normally closed terminal of the first relay, and the second common terminal and the second normally open terminal of the second relay are connected in sequence to form a fourth control circuit.

[0011] Furthermore, in the ventilation control mechanism, a third relay, a fourth relay, ..., a second relay, ... N-1 Relay, N is an integer greater than or equal to 3, the 3rd relay, the 4th relay, ..., the 2nd relay N-1 The relays are all double-circuit relays. The third control terminal of the control system is simultaneously connected to the coil connection terminal of the third relay and the coil connection terminal of the fourth relay, and the Nth control terminal of the control system is simultaneously connected to the second N-2 +1 relay coil terminal, 2 N-2 +2 Relay coil terminal, ···, 2nd N-1 The coil terminals of the relay;

[0012] The first normally closed terminal of the second relay is connected to the first common terminal of the third relay, and the first control circuit is divided into two sub-control circuits through the first normally closed terminal and the first normally open terminal of the third relay;

[0013] The first normally closed terminal of the third relay is connected to the first common terminal of the fifth relay, and the first sub-control circuit of the first control circuit is subdivided into two sub-control circuits through the first normally closed terminal and the first normally open terminal of the fifth relay; the first normally open terminal of the third relay is connected to the second common terminal of the fifth relay, and the second sub-control circuit of the first control circuit is subdivided into two sub-control circuits through the first normally closed terminal and the first normally open terminal of the fifth relay;

[0014] ···;

[0015] By analogy, the first control circuit is divided into 2 N-2 The second control circuit, the third control circuit and the fourth control circuit are also divided into two sub-control circuits. N-2 A sub-control circuit.

[0016] Furthermore, the exhaust control mechanism also includes N IO modules, which are respectively arranged at the first control end, the second control end,..., and the Nth control end of the control system.

[0017] Furthermore, the ventilation control mechanism also includes a power supply, and the common end of the first relay is connected to the power supply.

[0018] A laser processing machine comprises a machine tool, four exhaust devices and the above-mentioned exhaust control mechanism, wherein the machine tool is provided with four exhaust zones, the four exhaust devices are respectively arranged in the four exhaust zones, and the power supply ends of the four exhaust devices are respectively connected to the first control circuit, the second control circuit, the third control circuit and the fourth control circuit.

[0019] Furthermore, the laser processing machine also includes a laser processing head, a processing drive mechanism and a position detection mechanism. The processing drive mechanism is arranged on the machine tool, the laser processing head is arranged at the driving end of the processing drive mechanism, and the position detection mechanism is communicatively connected to the control system for detecting the position of the laser processing head.

[0020] Furthermore, the laser processing machine also includes an exhaust duct, which is arranged in the machine tool. The exhaust device includes an exhaust door and an exhaust drive mechanism. The machine tool has an exhaust port connected to the exhaust duct in each exhaust area. The exhaust door is rotatably arranged at the exhaust port, and the exhaust drive mechanism is used to drive the exhaust door to rotate to open / close the exhaust port.

[0021] A laser processing machine, comprising a machine tool, 2 N The machine tool is provided with 2 N Ventilation area, 2 N The exhaust devices are respectively arranged at 2 N In the ventilation area, 2 N The power supply ends of the exhaust devices are respectively connected to the 2 N-2 2 of the sub-control circuit and the second control circuit N-2 2 of the sub-control circuits and the third control circuit N-2 2 of the sub-control circuits and the 4th control circuit N-2 A sub-control circuit.

[0022] Furthermore, the laser processing machine also includes a laser processing head, a processing drive mechanism and a position detection mechanism. The processing drive mechanism is arranged on the machine tool, the laser processing head is arranged at the driving end of the processing drive mechanism, and the position detection mechanism is communicatively connected to the control system for detecting the position of the laser processing head.

[0023] Furthermore, the laser processing machine also includes an exhaust duct, which is arranged in the machine tool. The exhaust device includes an exhaust door and an exhaust drive mechanism. The machine tool has an exhaust port connected to the exhaust duct in each exhaust area. The exhaust door is rotatably arranged at the exhaust port, and the exhaust drive mechanism is used to drive the exhaust door to rotate to open / close the exhaust port.

[0024] Compared with the prior art, the present application provides an exhaust control mechanism and a laser processing machine, wherein the exhaust control mechanism can be applied to a laser processing machine with different exhaust zones, and the first control circuit is applied to the first exhaust zone on the machine tool, the second control circuit is applied to the second exhaust zone on the machine tool, the third control circuit is applied to the third exhaust zone on the machine tool, and the fourth control circuit is applied to the fourth exhaust zone on the machine tool. During the processing of the laser processing machine, the control system can control any exhaust zone to perform exhaust action only through control signals from the first control terminal and the second control terminal, while the remaining exhaust zones do not exhaust air, thereby effectively reducing the number of control signals used for exhaust control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the connections between the various relays in the exhaust control mechanism provided in this application.

[0026] Figure 2 This is a schematic diagram of the connection between each relay and the control system in the exhaust control mechanism provided in this application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Without further description, the elements, structures and features in one embodiment can also be beneficially combined with other embodiments.

[0028] It should be noted that when a metastructure is referred to as being "fixed to" or "set on" another metastructure, it may be directly on the other metastructure or indirectly on the other metastructure. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0029] The orientation or positional relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element structure referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0030] See also Figure 1 and Figure 2The ventilation control mechanism provided by the present application includes a control system, a first relay KA1 and a second relay KA2. The first control terminal Q1 of the control system is connected to the coil connection terminal of the first relay KA1, and the second control terminal Q2 of the control system is connected to the coil connection terminal of the second relay KA2.

[0031] Among them, the second relay KA2 uses a dual-circuit relay, that is, it includes two groups of terminals, the first group of terminals includes the first common terminal, the first normally closed terminal and the first normally open terminal, and the second group of terminals includes the second common terminal, the first normally closed terminal and the first normally open terminal. The first relay KA1 only needs one group of terminals, and a single-circuit relay can be selected; or a dual-circuit relay can be selected, and only one group of terminals is used during use, and the other group of terminals is not used.

[0032] The common terminal of the first relay KA1 can be connected to the power supply, the normally closed terminal of the first relay KA1 is connected to the first common terminal of the second relay KA2, and the normally open terminal of the first relay KA1 is connected to the second common terminal of the second relay KA2. At this time:

[0033] The common terminal and the normally closed terminal of the first relay KA1, the first common terminal and the first normally closed terminal of the second relay KA2 are connected in sequence to form a first control circuit; the common terminal and the normally closed terminal of the first relay KA1, the first common terminal and the first normally open terminal of the second relay KA2 are connected in sequence to form a second control circuit; the common terminal and the normally open terminal of the first relay KA1, the second common terminal and the second normally closed terminal of the second relay KA2 are connected in sequence to form a third control circuit; the common terminal and the normally closed terminal of the first relay KA1, the second common terminal and the second normally open terminal of the second relay KA2 are connected in sequence to form a fourth control circuit.

[0034] When the control system does not send out a control signal, the first control circuit is turned on, and the second control circuit, the third control circuit and the fourth control circuit are not turned on; when the second control terminal Q2 of the control system sends out a control signal to energize the coil of the second relay KA2, the first normally open terminal and the second normally open terminal of the second relay KA2 are turned on, and the first normally closed terminal and the second normally closed terminal become disconnected, so that the second control circuit is turned on, and the first control circuit, the third control circuit and the fourth control circuit are not turned on.

[0035] Similarly, when the first control terminal Q1 of the control system sends a control signal, the third control circuit is turned on, and the first control circuit, the second control circuit and the fourth control circuit are not turned on; when the first control terminal Q1 and the second control terminal Q2 of the control system send control signals at the same time, the fourth control circuit is turned on, and the first control circuit, the second control circuit and the third control circuit are not turned on.

[0036] It can be seen that the control system can obtain four control conditions of 00, 01, 10, and 11 by selecting whether to send a signal at the first control terminal Q1 and the second control terminal Q2 (assuming that the sent signal is 1 and the non-sent signal is 0), corresponding to the four situations in which the first control circuit, the second control circuit, the third control circuit, and the fourth control circuit are respectively turned on.

[0037] The exhaust control mechanism is applied to a laser processing machine with different exhaust zones. In addition, the first control circuit can be applied to the first exhaust zone on the machine tool, the second control circuit can be applied to the second exhaust zone on the machine tool, the third control circuit can be applied to the third exhaust zone on the machine tool, and the fourth control circuit can be applied to the fourth exhaust zone on the machine tool. When the laser processing machine is working, the exhaust control mechanism can select any exhaust zone to perform exhaust action, while the remaining exhaust zones are not exhausted to ensure the exhaust effect.

[0038] In some embodiments, see Figure 1 The ventilation control mechanism also includes a third relay KA3, a fourth relay KA4, ..., a second N-1 Relay, wherein N is an integer greater than or equal to 3.

[0039] See also Figure 2 The third control terminal Q3 of the control system is simultaneously connected to the coil connection terminal of the third relay KA3 and the coil connection terminal of the fourth relay KA4, ..., the Nth control terminal of the control system is simultaneously connected to the second N-2 +1 relay coil terminal, 2 N-2 +2 Relay coil terminal, ···, 2nd N-1 Relay coil terminals.

[0040] 3rd relay KA3, 4th relay KA4, .., 2nd relay N-1 The relays are all double-circuit relays, which include two sets of wiring terminals like the second relay KA2. When wiring, first confirm that the first normally closed terminal, the first normally open terminal, the second normally closed terminal, and the second normally open terminal of the relay are not connected, and connect the first common terminal and the second common terminal of a new relay to the first normally closed terminal and the first normally open terminal of the relay, and connect the first common terminal and the second common terminal of another new relay to the second normally closed terminal and the second normally open terminal of the old relay, so as to form Figure 1 The connection structure shown.

[0041] At this time, taking the first control circuit as an example, the following will be formed:

[0042] The first normally closed terminal of the second relay KA2 is connected to the first common terminal of the third relay KA3, and the first control circuit is divided into two sub-control circuits through the first normally closed terminal and the first normally open terminal of the third relay KA3;

[0043] The first normally closed terminal of the third relay KA3 is connected to the first common terminal of the fifth relay KA5, and the first sub-control circuit of the first control circuit is subdivided into two sub-control circuits through the first normally closed terminal and the first normally open terminal of the fifth relay KA5; the first normally open terminal of the third relay KA3 is connected to the second common terminal of the fifth relay KA5, and the second sub-control circuit of the first control circuit is subdivided into two sub-control circuits through the first normally closed terminal and the first normally open terminal of the fifth relay KA5;

[0044] ···;

[0045] 2nd N-3 +1 The 1st normally closed terminal of the relay is connected to the 2nd N-2 +1 relay 1 common terminal, and through the 2 N-2 +1 The 1st normally closed terminal and the 1st normally open terminal of the relay are used to divide the previous sub-control circuit into two sub-control circuits. N-3 +1 The 1st normally open terminal of the relay is connected to the 2nd N-2 +1 relay 2 common terminal, and through the 2 N-2 +1 The second normally closed terminal and the second normally open terminal of the relay are used to divide the upper sub-control circuit into two sub-control circuits;

[0046] ···;

[0047] By analogy, the first control circuit can be divided into two sub-control circuits, each of which forms two new sub-control circuits, and the new two sub-control circuits form four new sub-control circuits. Finally, the first control circuit will be divided into two N-2 A sub-control circuit.

[0048] Similarly, the second control circuit, the third control circuit and the fourth control circuit are finally divided into two N-2 The first control circuit, the second control circuit, the third control circuit and the fourth control circuit together form 2 N At this time, each sub-control circuit can control the ventilation action of a ventilation zone, but the control system only needs N control terminals, because N is less than 2. N , the number of control terminals of the control system is less than the number of sub-control circuits, that is, through the N control terminals of the control system, 2 N The number of ventilation zones effectively reduces the number of control terminals of the control system.

[0049] In one embodiment, when N is 3, the control system further includes a third relay KA3 and a fourth relay KA4, and the third control terminal Q3 of the control system is simultaneously connected to the coil connection terminal of the third relay KA3 and the coil connection terminal of the fourth relay KA4.

[0050] The first normally closed terminal of the second relay KA2 is connected to the first common terminal of the third relay KA3, and the first control circuit is divided into two sub-control circuits, i.e., a 1-1 control circuit and a 1-2 control circuit, through the first normally closed terminal and the first normally open terminal of the third relay KA3;

[0051] The first normally open terminal of the second relay KA2 is connected to the second common terminal of the third relay KA3, and the second control circuit is divided into two sub-control circuits, i.e., a 2-1 control circuit and a 2-2 control circuit, through the second normally closed terminal and the second normally open terminal of the third relay KA3;

[0052] The second normally closed terminal of the second relay KA2 is connected to the first common terminal of the fourth relay KA4, and the third control circuit is divided into two sub-control circuits, namely, a 3-1 control circuit and a 3-2 control circuit, through the first normally closed terminal and the first normally open terminal of the fourth relay KA4;

[0053] The second normally open terminal of the second relay KA2 is connected to the second common terminal of the fourth relay KA4, and the fourth control circuit is divided into two sub-control circuits, namely, a 4-1 control circuit and a 4-2 control circuit, through the second normally closed terminal and the second normally open terminal of the fourth relay KA4.

[0054] Therefore, when N is 3, a total of 8 sub-control circuits are formed, namely 1-1 control circuit, 1-2 control circuit, 2-1 control circuit, 2-2 control circuit, 3-1 control circuit, 3-2 control circuit, 4-1 control circuit, 4-2 control circuit, etc. At this time, the control system can control the on and off of the above 8 sub-control circuits through the 1st control terminal Q1, the 2nd control terminal Q2 and the 3rd control terminal Q3, and then control the ventilation action of the 8 ventilation areas, so that any one of the ventilation areas can perform ventilation action, while the other ventilation areas do not perform ventilation.

[0055] In another embodiment, when N is 4, the control system also includes the 3rd relay KA3, the 4th relay KA4, the 5th relay KA5, the 6th relay KA6, the 7th relay KA7 and the 8th relay KA8, the 3rd control terminal Q3 of the control system is simultaneously connected to the coil terminal of the 3rd relay KA3 and the coil terminal of the 4th relay KA4, and the 4th control terminal Q4 of the control system is simultaneously connected to the coil terminal of the 5th relay KA5, the coil terminal of the 6th relay KA6, the coil terminal of the 7th relay KA7 and the coil terminal of the 8th relay KA8.

[0056] At this time, the first normally closed terminal of the third relay KA3 is connected to the first common terminal of the fifth relay KA5, and the 1-1 control circuit is further divided into a 1-1-1 control circuit and a 1-1-2 control circuit through the first normally closed terminal and the first normally open terminal of the fifth relay KA5;

[0057] ···;

[0058] The second normally open terminal of the fourth relay KA4 is connected to the second common terminal of the eighth relay KA8, and the 4-2 control circuit is further divided into a 4-2-1 control circuit and a 4-2-2 control circuit through the second normally closed terminal and the second normally open terminal of the eighth relay KA8.

[0059] Therefore, when N is 4, a total of 16 sub-control circuits are formed, including 1-1-1 control circuit, 1-1-2 control circuit, 1-2-1 control circuit, 1-2-2 control circuit, 2-1-1 control circuit, 2-1-2 control circuit, 2-2-1 control circuit, 2-2-2 control circuit, 3-1-1 control circuit, 3-1-2 control circuit, 3-2-1 control circuit, 3-2-2 control circuit, 4-1-1 control circuit, 4-1-2 control circuit, 4-2-1 control circuit, 4-2-2 control circuit, etc. At this time, the control system can control the on and off of the above 16 sub-control circuits through the first control terminal Q1, the second control terminal Q2, the third control terminal Q3 and the fourth control terminal Q4, and then control the ventilation action of the 16 ventilation zones, so that any one of the ventilation zones can perform ventilation action, while the other ventilation zones do not exhaust air.

[0060] In another embodiment, when N is 5, the control system further includes a 3rd relay KA3, a 4th relay KA4, a 5th relay KA5, a 6th relay KA6, a 7th relay KA7, an 8th relay KA8, a 9th relay KA9, a 10th relay KA10, an 11th relay KA11, a 12th relay KA12, a 13th relay KA13, a 14th relay KA14, a 15th relay KA15 and a 16th relay KA16, and the 3rd control terminal Q3 of the control system is simultaneously connected to the coil terminal of the 3rd relay KA3 and the coil terminal of the 4th relay KA4, and the 4th control terminal Q3 of the control system is simultaneously connected to the coil terminal of the 3rd relay KA3 and the coil terminal of the 4th relay KA4, and the 4th control terminal Q4 of the control system is connected to the 16th relay KA16. Q4 is simultaneously connected to the coil terminal of the 5th relay KA5, the coil terminal of the 6th relay KA6, the coil terminal of the 7th relay KA7 and the coil terminal of the 8th relay KA8, and the 5th control terminal Q5 of the control system is simultaneously connected to the coil terminal of the 9th relay KA9, the coil terminal of the 10th relay KA10, the coil terminal of the 11th relay KA11, the coil terminal of the 12th relay KA12, the coil terminal of the 13th relay KA13, the coil terminal of the 14th relay KA14, the coil terminal of the 15th relay KA15 and the coil terminal of the 16th relay KA16.

[0061] At this time, the first normally closed terminal of the fifth relay KA5 is connected to the first common terminal of the ninth relay KA9, and the 1-1-1 control circuit is further divided into a 1-1-1-1 control circuit and a 1-1-1-2 control circuit through the first normally closed terminal and the first normally open terminal of the ninth relay KA9;

[0062] ···;

[0063] The second normally open terminal of the eighth relay KA8 is connected to the second common terminal of the sixteenth relay KA16, and the 4-2-2 control circuit is further divided into a 4-2-2-1 control circuit and a 4-2-2-2 control circuit through the second normally closed terminal and the second normally open terminal of the sixteenth relay KA16;

[0064] Therefore, when N is 5, a total of 32 sub-control circuits are formed, including 1-1-1-1 control circuit, 1-1-1-2 control circuit,..., 4-2-2-1 control circuit and 4-2-2-2 control circuit. At this time, the control system can control the on and off of the above 32 sub-control circuits through the 1st control terminal Q1, the 2nd control terminal Q2, the 3rd control terminal Q3, the 4th control terminal Q4 and the 5th control terminal Q5, and then control the ventilation action of the 32 ventilation areas, so that any one of the ventilation areas can perform ventilation action, while the other ventilation areas do not perform ventilation.

[0065] The exhaust control system may also include N IO modules, which are respectively arranged at the 1st control terminal Q1, the 2nd control terminal Q2,..., and the Nth control terminal of the control system, so as to realize the connection between the control system and the coil terminal of each relay through the IO module.

[0066] In summary, the structure of the exhaust control mechanism is simple and reliable. It can make maximum use of the output points of the control system and reduce the use of IO modules and cables through reasonable relay wiring methods, effectively saving costs. At the same time, it makes the interface layout and display more concise and clear, and ensures the exhaust effect of each exhaust area.

[0067] In addition, the present application also provides a laser processing machine, including a machine tool, four exhaust devices and the exhaust control mechanism of the above-mentioned first relay KA1 and second relay KA2, four exhaust zones are arranged on the machine tool, the four exhaust devices are respectively arranged in the four exhaust zones, and the power supply ends of the four exhaust devices are respectively connected to the first control circuit, the second control circuit, the third control circuit and the fourth control circuit.

[0068] The control system can obtain four control conditions of 00, 01, 10, and 11 by selecting whether to send signals at the first control terminal Q1 and the second control terminal Q2, corresponding to the four situations in which the first control circuit, the second control circuit, the third control circuit, and the fourth control circuit are respectively turned on, and then the power supply end of each exhaust device is controlled to be turned on separately, so that a certain exhaust device can realize the exhaust action.

[0069] In some embodiments, the laser processing machine may include 2 N A ventilation device, and the above settings 2 N-1 The exhaust control mechanism of the relay is set on the machine tool. N Ventilation area, 2 N The exhaust devices are respectively arranged at 2 N In the ventilation area, 2 N The power supply ends of the exhaust devices are respectively connected to the 2 N-2 2 of the sub-control circuit and the second control circuit N-2 2 of the sub-control circuits and the third control circuit N-2 2 of the sub-control circuits and the 4th control circuit N-2 A sub-control circuit.

[0070] The control system can obtain 2 N control conditions, corresponding to 2 N The situation that a certain sub-control circuit in the sub-control circuits is turned on individually can further control the power supply end of each exhaust device to be turned on individually, so that a certain exhaust device can realize the exhaust action.

[0071] In one embodiment, when N=3, eight control conditions of 000, 001, 010, 011, 100, 101, 110, and 111 can be obtained, corresponding to the situations where one of the 1-1 control circuit, 1-2 control circuit, 2-1 control circuit, 2-2 control circuit, 3-1 control circuit, 3-2 control circuit, 4-1 control circuit, and 4-2 control circuit is turned on alone, thereby realizing the ventilation action control of 8 ventilation zones.

[0072] In another embodiment, when N=4, sixteen control conditions can be obtained: 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111, corresponding to 1-1-1 control circuit, 1-1-2 control circuit, 1-2-1 control circuit, 1-2-2 control circuit, 2 By turning on one of the -1-1 control circuit, 2-1-2 control circuit, 2-2-1 control circuit, 2-2-2 control circuit, 3-1-1 control circuit, 3-1-2 control circuit, 3-2-1 control circuit, 3-2-2 control circuit, 4-1-1 control circuit, 4-1-2 control circuit, 4-2-1 control circuit and 4-2-2 control circuit, the ventilation action of 16 ventilation zones can be controlled.

[0073] In another embodiment, when N=4, thirty-two control conditions can be obtained, namely 00000, 00001, ..., 11110, and 11111, which respectively correspond to the situations where one of the 1-1-1-1 control circuit, the 1-1-1-2 control circuit, ..., the 4-2-2-1 control circuit, and the 4-2-2-2 control circuit is turned on alone, thereby realizing the ventilation action control of 32 ventilation zones.

[0074] In some embodiments, the laser processing machine may further include a laser processing head, a processing drive mechanism and a position detection mechanism. The processing drive mechanism is arranged on the machine tool, the laser processing head is arranged at the driving end of the processing drive mechanism, and the position detection mechanism is communicatively connected to the control system.

[0075] The processing drive mechanism is used to drive the laser processing head to move so as to adjust the processing position of the laser processing head. Since the first exhaust zone starts exhaust action by default when the control system does not send a control signal, the initial processing position of the laser processing head is in the first exhaust zone by default. During the movement of the laser processing head, the position detection mechanism can detect the position of the laser processing head and send the position of the laser processing head to the control system. When the control system finds that the laser processing head enters the remaining exhaust zones, it controls the corresponding exhaust zones to perform exhaust action so that the smoke, debris, welding slag, etc. generated by the laser processing head are extracted by the corresponding exhaust zones.

[0076] In some embodiments, the laser processing machine may further include an exhaust duct, which is arranged in the machine tool. The exhaust device includes an exhaust door and an exhaust drive mechanism. The machine tool has an exhaust port connected to the exhaust duct in each exhaust area. The exhaust door is rotatably arranged at the exhaust port, and the exhaust drive mechanism is used to drive the exhaust door to rotate to open / close the exhaust port.

[0077] The exhaust duct can be connected to an external fan or dust collector to generate negative pressure in the exhaust duct. When the sub-control circuit corresponding to the exhaust zone is in the disconnected state, the exhaust port in the exhaust zone is closed by the exhaust door, and the exhaust zone does not exhaust air; when the sub-control circuit corresponding to the exhaust zone is in the connected state, the exhaust drive mechanism drives the exhaust door to rotate to open the exhaust port, so that the exhaust port extracts external smoke, debris and welding slag.

[0078] Alternatively, the exhaust device may also achieve the exhaust action in other ways, which is not limited in this application.

[0079] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and application concept of the present application, and all these changes or substitutions should fall within the protection scope of the claims attached to the present application.

Claims

1. A ventilation control mechanism, characterized in that: It includes a control system, a first relay and a second relay, the second relay is a double-circuit relay, the first control end of the control system is connected to the coil connection end of the first relay, and the second control end of the control system is connected to the coil connection end of the second relay; The common terminal and the normally closed terminal of the first relay, the first common terminal and the first normally closed terminal of the second relay are connected in sequence to form a first control circuit; The common terminal and the normally closed terminal of the first relay, the first common terminal and the first normally open terminal of the second relay are connected in sequence to form a second control circuit; The common terminal and the normally open terminal of the first relay, the second common terminal and the second normally closed terminal of the second relay are connected in sequence to form a third control circuit; The common terminal and the normally closed terminal of the first relay, and the second common terminal and the second normally open terminal of the second relay are connected in sequence to form a fourth control circuit.

2. The ventilation control mechanism according to claim 1, characterized in that: Also includes the 3rd relay, the 4th relay, ..., the 2nd N-1 Relay, N is an integer greater than or equal to 3, the 3rd relay, the 4th relay, ..., the 2nd relay N-1 The relays are all double-circuit relays. The third control terminal of the control system is simultaneously connected to the coil connection terminal of the third relay and the coil connection terminal of the fourth relay, and the Nth control terminal of the control system is simultaneously connected to the second N-2 +1 relay coil terminal, 2 N-2 +2 Relay coil terminal, ···, 2nd N-1 The coil terminals of the relay; The first normally closed terminal of the second relay is connected to the first common terminal of the third relay, and the first control circuit is divided into two sub-control circuits through the first normally closed terminal and the first normally open terminal of the third relay; The first normally closed terminal of the third relay is connected to the first common terminal of the fifth relay, and the first sub-control circuit of the first control circuit is subdivided into two sub-control circuits through the first normally closed terminal and the first normally open terminal of the fifth relay; the first normally open terminal of the third relay is connected to the second common terminal of the fifth relay, and the second sub-control circuit of the first control circuit is subdivided into two sub-control circuits through the first normally closed terminal and the first normally open terminal of the fifth relay; ···； By analogy, the first control circuit is divided into 2 N-2 The second control circuit, the third control circuit and the fourth control circuit can be divided into two sub-control circuits respectively. N-2 A sub-control circuit.

3. The ventilation control mechanism according to claim 2, characterized in that: It also includes N IO modules, which are respectively arranged at the first control end, the second control end,..., and the Nth control end of the control system.

4. The ventilation control mechanism according to claim 2, characterized in that: A power supply is also included, and the common end of the first relay is connected to the power supply.

5. A laser processing machine, characterized in that: It includes a machine tool, four exhaust devices and the exhaust control mechanism as described in claim 1, wherein the machine tool is provided with four exhaust zones, the four exhaust devices are respectively arranged in the four exhaust zones, and the power supply ends of the four exhaust devices are respectively connected to the first control circuit, the second control circuit, the third control circuit and the fourth control circuit.

6. The laser processing machine according to claim 5, characterized in that: It also includes a laser processing head, a processing drive mechanism and a position detection mechanism. The processing drive mechanism is arranged on the machine tool, the laser processing head is arranged at the driving end of the processing drive mechanism, and the position detection mechanism is communicatively connected to the control system for detecting the position of the laser processing head.

7. The laser processing machine according to claim 5, characterized in that: It also includes an exhaust duct, which is arranged in the machine tool. The exhaust device includes an exhaust door and an exhaust drive mechanism. The machine tool has an exhaust port connected to the exhaust duct in each exhaust area. The exhaust door is rotatably arranged at the exhaust port, and the exhaust drive mechanism is used to drive the exhaust door to rotate to open / close the exhaust port.

8. A laser processing machine, characterized in that: Including machine tools, 2 N An exhaust device and an exhaust control mechanism as described in any one of claims 2 to 4, wherein the machine tool is provided with 2 N Ventilation area, 2 N The exhaust devices are respectively arranged at 2 N In the ventilation area, 2 N The power supply ends of the exhaust devices are respectively connected to the 2 N-2 2 of the sub-control circuit and the second control circuit N-2 2 of the sub-control circuits and the third control circuit N-2 2 of the sub-control circuits and the 4th control circuit N-2 A sub-control circuit.

9. The laser processing machine according to claim 8, characterized in that: It also includes a laser processing head, a processing drive mechanism and a position detection mechanism. The processing drive mechanism is arranged on the machine tool, the laser processing head is arranged at the driving end of the processing drive mechanism, and the position detection mechanism is communicatively connected to the control system for detecting the position of the laser processing head.

10. The laser processing machine according to claim 8, characterized in that It also includes an exhaust duct, which is arranged in the machine tool. The exhaust device includes an exhaust door and an exhaust drive mechanism. The machine tool has an exhaust port connected to the exhaust duct in each exhaust area. The exhaust door is rotatably arranged at the exhaust port, and the exhaust drive mechanism is used to drive the exhaust door to rotate to open / close the exhaust port.

Images