Laser cutting smoke collection device and method

By designing the upper and lower collecting parts in the laser cutting area, using positive and negative pressure chambers to form high-speed airflow, the problem of smoke and dust not being effectively collected is solved, efficient smoke and dust collection is achieved, and operator health and product quality are protected. .

CN110640313BActive Publication Date: 2024-12-20TOMI CHENGDU APPLIED TECH RES INST CO LTD
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Patent Information

Application Number
CN201910931757.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-09-29
Publication Date
2024-12-20
Estimated Expiration
2039-09-29

AI Technical Summary

Technical Problem

The smoke generated during laser cutting cannot be effectively collected, resulting in an impact on human health and product quality, and the collection effect of existing equipment is poor.

Method used

A laser cutting smoke collection device including an upper layer collection part and a lower layer collection part is designed to automatically seal the cutting area through the movement of the sealing sleeve, and a high-speed air flow is formed using the positive pressure chamber and the negative pressure chamber to ensure that the smoke is in the cutting area. Collection. The upper collecting part forms a stable high-speed air flow through the positive pressure gas in the positive pressure chamber and the lower collecting part through the air amplifier in the negative pressure chamber, thereby achieving effective collection of smoke and dust.

Benefits of technology

It achieves high smoke collection efficiency in the laser cutting area, prevents smoke from spreading upward, ensures the health of operators and improves product quality, and meets environmental protection requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a laser cutting smoke collection device, which belongs to the technical field of semiconductor laser cutting. The device comprises a workbench and an upper collecting part located above the workbench, wherein the upper collecting part comprises a sealing sleeve, a positive pressure chamber and an upper negative pressure chamber, wherein the positive pressure chamber and the upper negative pressure chamber are both provided with ports on the side facing the workbench, wherein the ports are independent of each other and are all located in the sealing sleeve; the sealing sleeve is provided with a driving mechanism for driving the sealing sleeve to move toward the workbench, wherein the driving mechanism enables the sealing sleeve to cooperate with the workbench to form a connecting channel, wherein the positive pressure chamber and the upper negative pressure chamber are connected through the connecting channel, and further comprises an air channel arranged in the workbench and a lower collecting part arranged below the workbench, wherein the lower collecting part comprises a lower negative pressure chamber connected to the air channel, wherein the lower negative pressure chamber is connected to an air amplifier, so as to achieve the purpose of automatically sealing the laser cutting part so as to effectively collect a large amount of smoke at the cutting site.
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Description

Technical Field

[0001] The present invention belongs to the technical field of semiconductor laser cutting, and specifically relates to a laser cutting smoke collection device and method suitable for the field of OLED panel laser cutting. Background Art

[0002] At present, laser cutting is basically used to complete Cell Cutting and Module Laser Cutting; however, a large amount of smoke and dust will be generated during the laser cutting process, many of which are harmful substances to the human body and dust that affects product quality; if these smoke and dust are not effectively collected, they are easily inhaled by people near the laser cutting point, thus affecting their health; these smoke and dust are not effectively collected and spread freely, which is also an important reason for product defects in the product manufacturing process; therefore, the harmful smoke and dust generated by laser cutting urgently need to be effectively collected;

[0003] At present, in the equipment in the industry, laser cutting is mostly carried out in an open space to expose the OLED panel. The smoke generated by the cutting is not collected or is only simply collected, but there is still a large amount of residual smoke that has not been collected. In this case, the smoke diffuses freely around, part of which is inhaled by the human body, affecting human health; part of it is adsorbed by the optical lens and JIG of the equipment, resulting in poor product quality.

[0004] Since the smoke is not collected or is simply collected with poor collection effect, a large amount of residual smoke is not collected during the cutting process, causing the smoke to diffuse freely inside and outside the equipment, thus affecting the health of the operators and the quality of the cut products. Summary of the invention

[0005] In view of this, in order to solve the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a laser cutting smoke collection device and method so as to achieve the purpose of automatically sealing the laser cutting part to effectively collect a large amount of smoke at the cutting site, so as to ensure the health of the operators and the quality of the cutting products.

[0006] The technical solution adopted by the present invention is: a laser cutting smoke collection device, including a workbench, and also including an upper collecting part located above the workbench, the upper collecting part including a sealing sleeve, a positive pressure chamber and an upper negative pressure chamber, the positive pressure chamber and the upper negative pressure chamber are both provided with ports on the side facing the workbench, each port is independent of each other and each port is located in the sealing sleeve; the sealing sleeve is equipped with a driving mechanism for driving it to move toward the workbench, the driving mechanism makes the sealing sleeve cooperate with the workbench to form a connecting channel, through which the positive pressure chamber and the upper negative pressure chamber are connected.

[0007] Furthermore, it also includes an air channel arranged in the workbench and a lower collecting part arranged below the workbench, the lower collecting part includes a lower negative pressure chamber connected to the air channel, the lower negative pressure chamber is connected to an air amplifier, and a stable negative pressure is formed in the lower negative pressure chamber through the air amplifier. At the same time, it can also cooperate with the positive pressure gas of the upper collecting part to generate a high-speed airflow.

[0008] Furthermore, the positive pressure chamber is connected to an air supply channel connected thereto, and the driving mechanism includes a push rod, one end of which is movably assembled in the air supply channel, and the other end is used to provide driving force to the sealing sleeve to enable the push rod to move downward under the action of the positive pressure gas in the air supply channel.

[0009] Furthermore, an air blowing channel is connected between the air supply channel and the positive pressure chamber, and the air supply channel is equipped with an air joint. The push rod reciprocates in the air supply channel to connect or disconnect the air joint and automatically switch the opening and closing of the air blowing channel by the movement of the push rod.

[0010] Furthermore, the push rod drives the sealing sleeve to move through a linkage assembly, and the linkage assembly includes a driving sleeve housing, which is slidably arranged in the upper negative pressure chamber, and one end of the driving sleeve housing is connected to the sealing sleeve, and the other end is connected to the push rod, so that the sealing sleeve can be evenly pressed onto the surface of the workbench through the linkage of the driving sleeve housing.

[0011] Furthermore, the linkage assembly also includes a plurality of guide rods arranged in the upper negative pressure chamber, each of which is distributed in the circumferential direction of the driving sleeve and is slidably assembled with the driving sleeve, and each guide rod is provided with a reset spring that provides a restoring force to the driving sleeve, so as to limit the movement path of the driving sleeve through the guide rods. At the same time, the movement of the driving sleeve can also be reset under the action of the reset spring.

[0012] Furthermore, the upper negative pressure chamber surrounds and covers the outside of the positive pressure chamber and the port of the upper negative pressure chamber surrounds the periphery of the port of the positive pressure chamber, and the sealing sleeve is sleeved inside the port of the upper negative pressure chamber, so that the high-speed airflow generated between the positive pressure chamber and the upper negative pressure chamber can be evenly distributed around the cutting area.

[0013] Furthermore, the upper negative pressure chamber is provided with a plurality of negative pressure channels connected thereto, so as to form a stable negative pressure in the upper negative pressure chamber through the negative pressure channels.

[0014] The present invention also provides a method for collecting smoke from laser cutting, the method comprising:

[0015] (1) an upper collecting part and a lower collecting part are arranged above and below the workbench respectively, and a lower negative pressure is provided to the cutting area of ​​the workbench through a lower negative pressure chamber in the lower collecting part;

[0016] (2) The cutting area of ​​the workbench is sealed by moving the sealing sleeve in the upper collecting part and making the sealing sleeve seal with the workbench;

[0017] (3) Positive pressure gas is introduced into the positive pressure chamber of the upper collecting part, and negative pressure is provided to the upper negative pressure chamber at the same time, so that high-speed airflow is formed between the positive pressure chamber and the upper negative pressure chamber, and between the positive pressure chamber and the lower negative pressure chamber.

[0018] Furthermore, the air amplifier is connected with the negative pressure chamber of the lower layer, and during the cutting process, the air amplifier is started to increase the air flow and flow rate.

[0019] The beneficial effects of the present invention are:

[0020] 1. By adopting the laser cutting smoke collection device and method disclosed in the present invention, the automatic sealing of the laser cutting area can be achieved through the movement of the sealing sleeve, and a stable high-speed airflow can be formed through the cooperation of the upper collecting part and the lower collecting part; at the same time, the airflow above the cutting area is from top to bottom to prevent the smoke from diffusing upward; the present application can realize the collection of smoke from all parts that the smoke generated by laser cutting can reach, and the collection of smoke above and below the cutting area at the same time, and the high-speed airflow formed by the simultaneous action of positive pressure gas and negative pressure makes the collection efficiency high and the effect good.

[0021] 2. The laser cutting smoke collection device and method disclosed in the present invention can effectively collect the smoke generated by laser cutting by automatically sealing the cutting area and forming a stable high-speed airflow in the through cavity formed by the seal, so as to solve the problems caused by the smoke; after collection, it is centrally processed outside the equipment to eliminate the pollution of the smoke to the atmosphere, which meets the environmental protection requirements of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the laser cutting smoke collection device provided by the present invention in a non-cutting state;

[0023] Figure 2 It is a schematic structural diagram of the upper collecting part of the laser cutting smoke collection device provided by the present invention in an initial state;

[0024] Figure 3 It is a partially enlarged schematic diagram of the laser cutting smoke collection device provided by the present invention in the cutting state;

[0025] Figure 4 It is a schematic diagram of the overall structure of the laser cutting smoke collection device provided by the present invention in the cutting state;

[0026] The following are marked in the attached figure:

[0027] 1-air connector, 2-sealing ring, 3-push rod, 4-guide rod, 5-reset spring, 6-sealing sleeve, 7-positive pressure chamber, 8-upper negative pressure chamber, 9-negative pressure channel, 10-working table, 11-lower negative pressure chamber, 12-air amplifier, 13-blowing channel, 14-driving housing, 15-air channel. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the invention product is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances; the drawings in the embodiments are used to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Example 1

[0035] like Figure 2 , Figure 3 As shown, in this embodiment, a laser cutting smoke collection device is specifically disclosed to overcome the problem of incomplete smoke collection in the existing laser cutting process, including a workbench 10, on which a cutting area for laser cutting is divided. The workbench 10 mainly plays the role of supporting the product, and an air channel 15 is arranged inside the workbench to realize the downward movement of airflow.

[0036] It also includes an upper collecting part located above the workbench 10, the upper collecting part includes a sealing sleeve 6, a positive pressure chamber 7 and an upper negative pressure chamber 8, the positive pressure chamber 7 and the upper negative pressure chamber 8 are both provided with ports on the side facing the surface of the workbench 10, the ports are independent of each other and are all located in the sealing sleeve 6, that is, the ports are all within the range surrounded by the sealing sleeve 6, during processing, the port of the positive pressure chamber 7 provides positive pressure gas to the surface of the workbench 10, while the upper negative pressure chamber 8 is filled with negative pressure gas; the sealing sleeve 6 is equipped with a driving mechanism for driving it to move toward the workbench 10, the driving mechanism makes the sealing sleeve 6 cooperate with the workbench 10 to form a connecting channel, through which the positive pressure chamber 7 and the upper negative pressure chamber 8 are connected, when the positive pressure chamber 7 and the upper negative pressure chamber 8 are connected, a through channel is formed, the positive pressure gas in the positive pressure chamber 7 will form a high-speed airflow under the negative pressure of the upper negative pressure chamber 8. Preferably, in order to ensure that the sealing sleeve 6 can fit tightly with the surface of the workbench 10, the sealing sleeve 6 is made of rubber material, which has slight elasticity and good sealing performance.

[0037] In order to achieve that the upper negative pressure chamber 8 and the positive pressure chamber 7 can absorb the smoke generated by cutting with the best effect, the upper negative pressure chamber 8 is surrounded and wrapped on the outside of the positive pressure chamber 7 and the port of the upper negative pressure chamber 8 is surrounded on the periphery of the port of the positive pressure chamber 7, and the sealing sleeve 6 is sleeved in the port of the upper negative pressure chamber 8, so that the sealing sleeve 6 can move up and down relative to the upper negative pressure chamber 8. The upper negative pressure chamber 8 and the positive pressure chamber 7 are arranged in this structure, mainly considering that the circulation of the internal airflow is more uniform, and it is easier to achieve in manufacturing and processing, so as to ensure that the circulating airflow is evenly distributed around the cutting area to collect smoke to the maximum extent. Of course, in the actual application process, the above structure is not the only one. The port of the upper negative pressure chamber 8 and the port of the positive pressure chamber 7 can also be arranged side by side, which can also realize the formation of a circulating airflow in the sealed space of the cutting area, but its actual smoke collection effect is slightly worse.

[0038] In order to achieve a stable negative pressure in the upper negative pressure chamber 8, a plurality of negative pressure channels 9 connected thereto are provided in the upper negative pressure chamber 8. In the present embodiment, negative pressure channels 9 are symmetrically provided on both sides of the upper negative pressure chamber 8, and the negative pressure channels 9 are connected to a device for generating negative pressure to collect the smoke generated by cutting. The device for generating negative pressure here belongs to the prior art and will not be described in detail.

[0039] In order to achieve stable blowing of positive pressure gas into the positive pressure chamber 7, the positive pressure chamber 7 is connected to an air supply channel connected thereto, and two air supply channels are provided and symmetrically distributed on both sides of the positive pressure chamber 7. The driving mechanism includes a push rod 3, one end of the push rod 3 is movably assembled in the air supply channel, and the other end is used to provide driving force to the sealing sleeve 6.

[0040] In order to realize the movement of the driving mechanism by using the positive pressure gas as a power source while blowing the positive pressure gas into the positive pressure chamber 7, the purpose of automatically sealing the cutting area can be achieved. A blowing channel 13 is connected between the air supply channel and the positive pressure chamber 7, and the air supply channel is equipped with an air connector 1. The air interface is connected to a device that provides positive pressure gas to it. The push rod 3 reciprocates in the air supply channel. When the end position of the push rod 3 is lower than the opening of the air supply channel, the air connector 1 and the blowing channel 13 are in a connected state; when the end position of the push rod 3 is higher than the opening of the air supply channel, the air connector 1 and the blowing channel 13 are in a disconnected state. Preferably, in order to realize that the air pressure in the air supply channel can effectively push the push rod 3, a plurality of sealing rings 2 are sleeved on the end of the push rod 3, and each sealing ring 2 realizes the sealing between the push rod 3 and the air supply channel. Preferably, the blowing channel 13 is arranged at an angle so that it can play a role in blowing the positive pressure gas to the bottom of the positive pressure chamber 7 when it is working.

[0041] The push rod 3 drives the sealing sleeve 6 to move through a linkage assembly, and the linkage assembly includes a driving sleeve 14. The function of the driving sleeve 14 is to enable the edge of the sealing sleeve 6 to be evenly stressed to ensure that it can be tightly pressed against the surface of the workbench 10. The driving sleeve 14 is slidably arranged in the upper negative pressure chamber 8, and one end of the driving sleeve 14 is connected to the sealing sleeve 6, and the other end is connected to the push rod 3. The push rod 3 provides power for the movement of the driving sleeve 14.

[0042] The linkage assembly also includes a plurality of guide rods 4 arranged in the upper negative pressure chamber 8, each guide rod 4 is distributed in the circumferential direction of the drive housing 14 and is slidably assembled with the drive housing 14, and each guide rod 4 is sleeved with a reset spring 5 that provides a restoring force to the drive housing 14. The function of each guide rod 4 is to limit the movement of the drive housing 14 so that it can move in a direction perpendicular to the surface of the workbench 10. At the same time, the reset spring 5 sleeved on the guide rod 4 can provide a restoring force to the drive housing 14. When the positive pressure gas of the air connector 1 stops supplying, the reset spring 5 can push the drive housing 14 upward. The movement of the drive housing 14 can, on the one hand, cause the sealing sleeve 6 to reset, and on the other hand, cause the push rod 3 to reset to the initial state, so as to disconnect the blowing channel 13 from the air connector 1.

[0043] Example 2

[0044] On the basis of Example 1, in order to further improve the smoke and dust collection effect in the cutting area in an all-round manner and cooperate with the air flow effect above the cutting area, as shown in FIG. Figure 1 As shown, it also includes an air channel 15 arranged in the workbench 10 and a lower collecting part arranged below the workbench 10. The air channel 15 is connected to the cutting area of ​​the workbench 10 and is used to effectively collect the smoke and dust discharged downward from the cutting area during cutting, and also realize the downward movement of airflow. The lower collecting part includes a lower negative pressure chamber 11 connected to the air channel 15, and the lower negative pressure chamber 11 is connected to an air amplifier 12, so that the negative pressure in the lower negative pressure chamber 11 is stabilized by the air amplifier 12; the air amplifier 12 increases the air flow and flow rate, improves the air flow rate and flow rate, and at the same time, cooperates with the positive pressure gas generated by the upper collecting part to generate a larger air flow, so as to take away a small amount of smoke and dust generated under the product when the product is cut.

[0045] The laser cutting smoke collection device provided in this embodiment has the following working principle:

[0046] like Figure 4As shown, when laser cutting is performed, positive pressure gas is first introduced from the air joint 1. Since the sealing ring 2 plays a sealing role, the push rod 3 moves downward under the action of the positive pressure gas; under the guidance of the guide rod 4, the driving sleeve 14 drives the sealing sleeve 6 to move downward while compressing the return spring 5;

[0047] When the sealing sleeve 6 moves onto the workbench 10 and has a certain amount of compression, the sealing sleeve 6 is tightly fitted to the workbench 10. At this time, since the push rod 3 moves downward, the blowing channel 13 is connected to the air joint 1, and the positive pressure gas enters the positive pressure chamber 7 through the blowing channel 13, and the push rod 3 stops moving downward and maintains the current state;

[0048] At this time, the surroundings of the product are sealed on the workbench 10; positive pressure gas is continuously provided to the lower part of the positive pressure chamber 7 through the blowing channel 13, and the negative pressure channel 9 provides negative pressure to the upper negative pressure chamber 8, and forms a high-speed airflow with the positive pressure gas in the positive pressure chamber 7; the smoke generated during laser cutting is quickly collected along with the high-speed airflow; and the positive pressure gas can prevent the smoke from moving freely upward, and can blow up the dust adsorbed on the product and quickly collect it along with the high-speed airflow;

[0049] The lower negative pressure chamber 11 generates a larger air flow under the action of the air amplifier 12 to take away a small amount of smoke and dust generated under the product during cutting;

[0050] When the laser cutting is completed, the positive pressure gas is stopped from being introduced from the air joint 1. At this time, under the rebound force of the reset spring 5, the sealing sleeve 6, the sealing ring 2 and the push rod 3 move upward and reset, releasing the sealing state around the product.

[0051] Example 3

[0052] In this embodiment, a laser cutting smoke collection method is provided in combination with the laser cutting smoke collection devices provided in Embodiment 1 and Embodiment 2, so as to effectively and thoroughly collect the smoke during the laser cutting process. The method is specifically as follows:

[0053] (1) An upper collecting part and a lower collecting part are arranged above and below the workbench 10, respectively, and a lower negative pressure is provided to the cutting area of ​​the workbench 10 through a lower negative pressure chamber 11 in the lower collecting part; the lower negative pressure chamber 11 is connected to the lower negative pressure chamber 11 through an air amplifier 12, and during cutting processing, the air amplifier 12 is started to increase the air flow and flow rate;

[0054] (2) The sealing sleeve 6 in the upper collecting portion moves and seals the sealing sleeve 6 with the workbench 10 to seal the cutting area of ​​the workbench 10;

[0055] (3) Positive pressure gas is introduced into the positive pressure chamber 7 of the upper collecting part, and negative pressure is provided to the upper negative pressure chamber 8 at the same time, so that high-speed airflow is formed between the positive pressure chamber 7 and the upper negative pressure chamber 8, and between the positive pressure chamber 7 and the lower negative pressure chamber 11.

[0056] This method can achieve that positive pressure gas and negative pressure act on the entire cutting affected area at the same time, and form a high-speed airflow, which can quickly and effectively collect smoke and dust.

[0057] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A laser cutting smoke collection device, comprising a workbench, characterized in that: It also includes an upper collecting part located above the workbench, the upper collecting part includes a sealing sleeve, a positive pressure chamber and an upper negative pressure chamber, the positive pressure chamber and the upper negative pressure chamber are both provided with ports on the side facing the workbench, the ports are independent of each other and are all located in the sealing sleeve; the sealing sleeve is equipped with a driving mechanism for driving it to move toward the workbench, the driving mechanism enables the sealing sleeve to cooperate with the workbench to form a connecting channel, through which the positive pressure chamber and the upper negative pressure chamber are connected; the positive pressure chamber is connected to an air supply channel connected thereto, the driving mechanism includes a push rod, one end of the push rod is movably assembled in the air supply channel, and the other end is used to provide driving force to the sealing sleeve; It also includes an air channel arranged in the workbench and a lower collecting part arranged below the workbench, the lower collecting part includes a lower negative pressure chamber connected to the air channel, and the lower negative pressure chamber is connected to an air amplifier; an air blowing channel is connected between the air supply channel and the positive pressure chamber, and the air supply channel is equipped with an air joint, and the air joint and the air blowing channel are connected or disconnected by reciprocating motion of a push rod in the air supply channel; the push rod drives the sealing sleeve to move through a linkage assembly, and the linkage assembly includes a driving sleeve shell, which is slidably arranged in the upper negative pressure chamber, and one end of the driving sleeve shell is connected to the sealing sleeve, and the other end is connected to the push rod.

2. The laser cutting fume collection device according to claim 1, characterized in that: The linkage assembly also includes a plurality of guide rods arranged in the upper negative pressure chamber, each guide rod is distributed in the circumferential direction of the drive sleeve and is slidably assembled with the drive sleeve, and each guide rod is sleeved with a return spring that provides a restoring force to the drive sleeve.

3. The laser cutting fume collection device according to claim 1, characterized in that: The upper negative pressure chamber surrounds and covers the outside of the positive pressure chamber, and the port of the upper negative pressure chamber surrounds the periphery of the port of the positive pressure chamber, and the sealing sleeve is sleeved in the port of the upper negative pressure chamber.

4. The laser cutting fume collection device according to claim 3, characterized in that: The upper negative pressure chamber is provided with a plurality of negative pressure channels communicating therewith.

5. A method for collecting smoke from laser cutting, implemented based on the laser cutting smoke collection device according to any one of claims 1 to 4, characterized in that: The method includes: (1) An upper collecting part and a lower collecting part are arranged above and below the workbench respectively, and a lower negative pressure is provided to the cutting area of ​​the workbench through a lower negative pressure chamber in the lower collecting part; (2) The cutting area of ​​the workbench is sealed by moving the sealing sleeve in the upper collecting portion and making the sealing sleeve seal with the workbench; (3) Positive pressure gas is introduced into the positive pressure chamber of the upper collecting part, and negative pressure is provided to the upper negative pressure chamber at the same time, so that high-speed airflow is formed between the positive pressure chamber and the upper negative pressure chamber, and between the positive pressure chamber and the lower negative pressure chamber.

6. The laser cutting smoke collection method according to claim 5, characterized in that: The air amplifier is connected with the negative pressure chamber of the lower layer. During cutting, the air amplifier is started to increase the air flow and flow rate.