A dust absorption device accompanying the cutting light of a laser cutting equipment

Abstract

This invention discloses a dust absorption device accompanying the cutting light of a laser cutting equipment, comprising: an accompanying absorption end disposed on the laser cutting head; a filter assembly connected to the accompanying absorption end via a pipe; and a negative pressure generating assembly connected to the output end of the filter assembly via a pipe. The negative pressure generating assembly generates negative pressure to allow the accompanying absorption end to absorb debris generated within the laser cutting chamber, and the filter assembly filters the debris absorbed by the accompanying absorption end. By using the suction head attached to the cutting head of the three-dimensional five-axis laser cutting equipment, small amounts of dust, smoke, debris, and waste adhering to the cutting worktable can be cleaned. It can also clean some hard-to-reach areas, preventing dust and smoke from flowing back up along the copper cutting nozzle in the cutting head and adhering to the condenser lens, causing contamination and damage to the condenser lens, and protecting the health of employees.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and more specifically to a dust absorption device accompanying the cutting light of a laser cutting equipment. Background Technology

[0002] In recent years, 3D five-axis laser cutting equipment has been widely used in the automotive, military, aerospace and medical device industries. The highly flexible laser beam movement technology enables high precision to be guaranteed even for complex 3D workpieces, achieving high-precision processing results.

[0003] However, existing 3D five-axis laser cutting equipment uses a method where a high-pressure air gun is installed inside the cutting head. The airflow and the cutting light are released together. During the release process, the cutting light cuts the workpiece, generating a large amount of dust, smoke, debris, and waste. The air gun blows this into other parts of the protective room, where a large dust absorption device on the roof absorbs all the dust. This results in less than ideal dust removal. A small amount of dust, smoke, debris, and waste is scattered and adhered to the cutting worktable, walls, floor, five-axis machine, and air. However, if too much of this dust, smoke, debris, and waste accumulates, it becomes inconvenient to clean the equipment.

[0004] Meanwhile, there are some dead corners in the cutting chamber that are not easy to clean. Dust and smoke may even flow backward along the copper cutting nozzle in the cutting head and adhere to the condenser lens, causing pollution and damage to the condenser lens and affecting the service life of the entire three-dimensional five-axis laser cutting equipment. A small amount of dust and smoke may be inhaled by employees, which will also affect their health over time. Summary of the Invention

[0005] The purpose of this invention is to provide a dust absorption device accompanying the cutting light of a laser cutting equipment, so as to solve the technical problem that existing three-dimensional five-axis laser cutting equipment cannot completely absorb dust in the cutting chamber because it uses fixed dust absorption.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] A dust absorption device accompanying the cutting light of a laser cutting machine includes:

[0008] The accompanying absorption end is set on the laser cutting head;

[0009] The filter assembly is connected to the accompanying absorption end via a pipe;

[0010] A negative pressure generating component is connected to the output end of the filter component via a pipe;

[0011] The negative pressure generating component generates negative pressure to allow the accompanying absorption end to absorb debris generated in the laser cutting chamber, and the filtering component is used to filter the debris absorbed by the accompanying absorption end.

[0012] As a preferred embodiment of the present invention, the accompanying absorption end further includes a horn absorption end installed at the top of the laser cutting head cutting space, and the horn absorption end is connected to the filter assembly through a pipe.

[0013] In a preferred embodiment of the present invention, the filtration assembly includes a first filter box and a second filter box connected in sequence by pipes. The input end of the first filter box is connected to the accompanying absorption end and the horn absorption end by pipes, and the output end of the second filter box is connected to the negative pressure generating assembly by pipes.

[0014] The first filter box contains a filter bag, and the second filter box contains a filter cartridge assembly.

[0015] As a preferred embodiment of the present invention, the accompanying absorption end includes a first annular nozzle assembly disposed on the laser cutting head and an annular absorption assembly located above the first annular nozzle assembly.

[0016] The first annular nozzle assembly is used to generate a conical jet toward the cutting point.

[0017] As a preferred embodiment of the present invention, the first annular nozzle assembly is mounted on the laser cutting head via an adjusting component;

[0018] The adjustment component is used to adjust the annular diameter of the contact between the conical jet and the workpiece being cut.

[0019] As a preferred embodiment of the present invention, a second annular nozzle assembly is provided on the laser cutting head located between the first annular nozzle assembly and the annular absorption assembly, wherein the second annular nozzle assembly is used to generate a jet with a conical surface perpendicular to the conical jet.

[0020] As a preferred embodiment of the present invention, it further includes a plurality of baffles disposed on the inner wall of the laser cutting chamber, the plurality of baffles being vertically distributed around the laser cutting head, and the baffles being installed on the inner wall of the laser cutting chamber via telescopic rods;

[0021] The telescopic rod is used to adjust the distance between the baffle and the laser cutting head; there is a gap between two adjacent baffles;

[0022] The second annular nozzle assembly generates a jet perpendicular to the conical surface of the conical jet, which is directed towards the surface of the workpiece to be cut by the baffle.

[0023] In a preferred embodiment of the present invention, the first annular nozzle assembly includes an annular support and a plurality of nozzles. The annular support is provided with an annular protrusion, and the plurality of nozzles are connected at equal intervals to the annular protrusion, with the middle of each nozzle rotatably connected to the annular protrusion. The top of each nozzle is connected to the adjustment component, which is used to drive the nozzle to rotate around the annular protrusion.

[0024] As a preferred embodiment of the present invention, the jets generated by two adjacent nozzles form a gap near the nozzles.

[0025] As a preferred embodiment of the present invention, the baffle includes a first plate and a second plate, wherein the first plate and the second plate are hinged together.

[0026] The telescopic rod is used to synchronously adjust the distance between the first plate and the second plate and the workpiece to be cut, and to keep the first plate vertical. The second plate rotates hinged around the connection point with the first plate under the drive of the telescopic rod.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] This invention, through a suction head that accompanies the cutting head of a three-dimensional five-axis laser cutting equipment, can clean up small amounts of dust, smoke, debris, and waste scattered on the cutting worktable, walls, floor, five-axis machine, and in the air. It can also clean some hard-to-reach corners, preventing dust and smoke from flowing back up along the copper cutting nozzle in the cutting head and adhering to the condenser lens, causing pollution and damage to the condenser lens, and protecting the health of employees. Attached Figure Description

[0029] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the overall accompanying absorption end structure according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the baffle structure according to an embodiment of the present invention.

[0033] The labels in the diagram represent the following:

[0034] 1-Accompanying absorption end; 2-Filter assembly; 3-Negative pressure generating assembly; 4-Horn absorption end; 5-Baffle; 6-Telescopic rod;

[0035] 11-First annular nozzle assembly; 12-Annular absorption assembly; 13-Adjustment assembly; 14-Second annular nozzle assembly;

[0036] 111-Annular bracket; 112-Annular protrusion; 113-Nozzle;

[0037] 21-First filter box; 22-Second filter box; 23-Filter bag; 24-Filter cartridge assembly;

[0038] 51 - First plate; 52 - Second plate. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides a cutting light-accompanying dust absorption device for a laser cutting equipment, comprising: an accompanying absorption end 1, which is disposed on the laser cutting head.

[0041] The filter assembly 2 is connected to the accompanying absorption end 1 via a pipe.

[0042] Negative pressure generating component 3 is connected to the output end of filter component 2 via a pipe.

[0043] The negative pressure generating component 3 generates negative pressure to allow the accompanying absorption end 1 to absorb the debris generated in the laser cutting chamber, and the filter component 2 is used to filter the debris absorbed by the accompanying absorption end 1.

[0044] In this invention, a closed box is made of stainless steel, with an opening at the top of the box. An exhaust port is installed by bolting a galvanized iron sheet duct to the top of the box. The filtered air can be discharged outside the factory through a connecting hose or galvanized iron sheet duct.

[0045] The accompanying absorption end 1 also includes a horn absorption end 4 installed at the top of the laser cutting head cutting space. The horn absorption end 4 is connected to the filter assembly 2 through a pipe and is used to absorb dust scattered in the air inside the laser cutting chamber.

[0046] The filter assembly 2 includes a first filter box 21 and a second filter box 22 connected sequentially via pipes. The input end of the first filter box 21 is connected to the accompanying absorption end 1 and the horn absorption end 4 via pipes, and the output end of the second filter box 22 is connected to the negative pressure generating assembly 3 via pipes. In this invention, the overall suction force is adjusted by selecting vacuum pumps (negative pressure generating assembly 3) of different power levels. Simultaneously, filter elements and filter bags of different materials can be selected to improve the dust removal, filtration, and cleaning effects. The power of the vacuum pump motor is at least 600W.

[0047] In the filter assembly 2, the top of the filter bag box is connected to the laser cutting chamber via a galvanized iron sheet duct. The laser cutting chamber has a horn-shaped suction port (horn absorption end 4) to absorb dust scattered in the air of the protective room. A small galvanized iron sheet duct is installed on the side of the top of the filter box. The end of the small galvanized iron sheet duct is connected to a section of side hose, which is then connected to a telescopic tube. Another section of hose is installed at the end of the telescopic tube, and a suction head (accompanying absorption end 1) is installed at the other end of the hose. The suction head is fixedly connected to the cutting head of the three-dimensional five-axis laser cutting equipment by bolts and retaining rings. The extensibility of the hose and telescopic tube is used to create an accompanying dust absorption device.

[0048] The first filter box 21 contains filter bags 23, which are made of nylon or polyester fiber and have a filtration accuracy of 5-15um. The bag opening fixing ring is made of galvanized steel ring, and the specific size of the bag opening is determined according to the size of the filter bag box. The second filter box 22 contains filter cartridges 24, which are the main filter materials. The filter cartridge body is made of polyester fiber non-woven fabric, which has extremely low operating resistance, extremely low energy consumption and operating costs, and is simple and quick to maintain and replace the filter cartridge, shortening downtime.

[0049] In actual cutting, simply relying on the airflow generated during the laser cutting process or the negative pressure adsorption generated by the negative pressure generator to absorb dust in the laser cutting chamber is obviously not ideal when the pipeline structure is long. In particular, dust that accumulates at the bottom, corners, or workpiece corners will still accumulate. Even if the negative pressure airflow generated by the negative pressure generator is strong, dust will obviously accumulate at the corners of the workpiece where the airflow is perpendicular to the workpiece.

[0050] Therefore, in this invention, by generating an accompanying airflow during the laser cutting process, the cut position and the position to be cut are purged, and at the same time, the guiding effect is improved so that the dust in the cutting chamber is absorbed by the horn absorption end 4 after the cutting.

[0051] Specifically, the accompanying absorption end 1 includes a first annular nozzle assembly 11 disposed on the laser cutting head and an annular absorption assembly 12 located above the first annular nozzle assembly 11. The first annular nozzle assembly 11 is used to generate a conical jet toward the cutting point.

[0052] The purpose is to concentrate the airflow generated by the first annular nozzle assembly 11 at the cutting position as much as possible without affecting the temperature at the cutting point, that is, to create a "blowing ring" by the cone tip of the generated conical jet contacting the workpiece. Furthermore, the jet at the cone tip is scattered under the guidance of the workpiece surface, allowing most of the scattered airflow to move away from the cutting point. This creates an airflow shield at the cutting position, preventing cutting dust from entering the conical jet. The scattered airflow can blow away the surface of the workpiece, and at the same time, the scattered airflow diffuses towards the inner wall of the cutting chamber, thus forming a counterclockwise airflow from bottom to top, which is eventually absorbed by the horn absorption end 4, carrying away the dust in the cutting chamber.

[0053] Furthermore, in order to obtain an ideal conical jet, that is, to adjust the angle of contact between the conical jet and the workpiece, the first annular nozzle assembly 11 is mounted on the laser cutting head via an adjustment assembly 13. The adjustment assembly 13 is used to adjust the annular diameter of the contact between the conical jet and the workpiece being cut.

[0054] Of course, in order to avoid generating an upward jet or to prevent dust carried by the airflow from flowing toward the laser cutting head, it is necessary to block the airflow toward the laser cutting head. For this purpose, a second annular nozzle assembly 14 is provided on the laser cutting head located between the first annular nozzle assembly 11 and the annular absorption assembly 12. The second annular nozzle assembly 14 is used to generate a vertical conical jet from a conical surface.

[0055] Furthermore, if the cutting chamber is large, the scattered airflow travels a long distance towards the inner wall of the cutting chamber, thus losing its upward momentum, and larger dust particles will still settle and accumulate. To address this, this invention uses multiple baffles 5 vertically distributed around the laser cutting head, mounted on the inner wall of the laser cutting chamber via telescopic rods 6. The telescopic rods 6 change the distance between the baffles 5 and the workpiece, allowing the multiple baffles 5 to surround the workpiece according to its specific shape, thereby further compressing the cutting space. A gap is maintained between adjacent baffles.

[0056] The purpose of compressing the cutting space of the workpiece is to allow the generated jet or scattered airflow to quickly discharge the airflow generated in the cutting space through the gap, thereby preventing dust from settling in the cutting space.

[0057] The telescopic rod 6 is used to adjust the distance between the baffle 5 and the laser cutting head. There is a gap between two adjacent baffles 5. The gap is designed to allow airflow that is blocked by the baffles to enter the gap and escape. Specifically, the telescopic rod 6 can be a folding and telescopic structure.

[0058] Furthermore, at this time, the vertical conical jet generated by the second annular nozzle assembly 14 and the baffle 5 are directed toward the surface of the workpiece to be cut.

[0059] To better illustrate the working principle of the first annular nozzle assembly 11 in this invention, the first annular nozzle assembly 11 specifically includes an annular support 111 and multiple nozzles 113. An annular protrusion 112 is provided on the annular support 111, and the multiple nozzles 113 are connected at equal intervals to the annular protrusion 112, with the center of each nozzle 113 rotatably connected to the annular protrusion 112. An adjustment assembly 13 is connected to the top of each nozzle 113, and the adjustment assembly 13 is used to drive the nozzle 113 to rotate around the annular protrusion 112. By setting synchronous control and independent angle adjustment control of the multiple nozzles 113, adaptability to the surface of the workpiece can be achieved, that is, adjusting the contact angle and range between the arc-shaped airflow surface generated by each nozzle 113 and the structure of the workpiece surface.

[0060] To further explain, the adjustment component 13 provided by the present invention can specifically be a miniature telescopic rod or a pneumatic cylinder, and the connection between the adjustment component 13 and the nozzle 113 is hinged.

[0061] The jets generated by two adjacent nozzles 113 form a gap near the nozzles 113. The purpose of this gap is to allow the airflow scattered into the conical airflow to escape after it contacts the workpiece surface.

[0062] Furthermore, when the workpiece to be cut has diverse shapes and structures or circumferential protrusions, the baffle 5 cannot be close to the cutting position or is too far away when adjusting it. Obviously, the guiding effect on the airflow generated by the first annular nozzle assembly 11 or the second annular nozzle assembly 14 is poor. Therefore, the baffle 5 includes a first plate 51 and a second plate 52, which are hinged together. Of course, in this invention, the baffle 5 can be formed by multiple plates that are hinged together sequentially. Driving multiple plates only requires controlling the top and bottom of the baffle 5. By adapting the sides of the workpiece through multiple sequentially hinged plates, the adaptability to workpieces of different volumes can be achieved, and the airflow can be guided.

[0063] The telescopic rod 6 is used to synchronously adjust the distance between the first plate 51 and the second plate 52 and the workpiece to be cut, and to keep the first plate 51 vertical. The second plate 52 is driven by the telescopic rod 6 to rotate hinged around the connection point with the first plate 51.

[0064] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A cutting dust absorption device for a laser cutting apparatus, characterized by, The utility model relates to a laser cutting dust absorption device, including: A suction end (1) is arranged on the laser cutting head; A filter assembly (2) is connected to the suction end (1) by a pipeline; A negative pressure generating assembly (3) is connected to the output end of the filter assembly (2) by a pipeline; The negative pressure generating assembly (3) generates negative pressure to make the suction end (1) absorb the debris generated in the laser cutting chamber, and the filter assembly (2) filters the debris absorbed by the suction end (1); The suction end (1) includes a first annular nozzle assembly (11) arranged on the laser cutting head and a ring-shaped absorption assembly (12) located above the first annular nozzle assembly (11); The first annular nozzle assembly (11) generates a conical jet flow towards the cutting point; The first annular nozzle assembly (11) is installed on the laser cutting head by an adjusting assembly (13); The adjusting assembly (13) adjusts the contact ring diameter between the conical jet flow and the cutting workpiece; A second annular nozzle assembly (14) is arranged on the laser cutting head between the first annular nozzle assembly (11) and the ring-shaped absorption assembly (12), and the second annular nozzle assembly (14) generates a jet flow perpendicular to the conical surface of the conical jet flow; A plurality of baffles (5) are arranged on the inner wall of the laser cutting chamber, and the baffles (5) are vertically distributed around the laser cutting head, and the baffles (5) are installed on the inner wall of the laser cutting chamber by telescopic rods (6); The telescopic rods (6) adjust the distance between the baffles (5) and the laser cutting head; there is a gap between adjacent baffles (5); The jet flow generated by the second annular nozzle assembly (14) perpendicular to the conical surface of the conical jet flow is directed towards the surface of the workpiece to be cut by the baffles (5).

2. The cutting dust absorbing device for a laser cutting apparatus according to claim 1, wherein The suction end (1) also includes a horn suction end (4) installed at the top of the cutting space of the laser cutting head, and the horn suction end (4) is connected to the filter assembly (2) by a pipeline.

3. The cutting dust absorbing device for a laser cutting apparatus according to claim 2, wherein The filter assembly (2) includes a first filter box (21) and a second filter box (22) connected by a pipeline, the input end of the first filter box (21) is connected to the suction end (1) and the horn suction end (4) by a pipeline, and the output end of the second filter box (22) is connected to the negative pressure generating assembly (3) by a pipeline; The first filter box (21) is provided with a filter bag (23), and the second filter box (22) is provided with a filter cartridge group (24).

4. The cutting dust absorbing device for a laser cutting apparatus according to claim 1, wherein The first annular shower head assembly (11) comprises an annular support (111) provided with an annular protrusion (112), and a plurality of shower heads (113) connected on the annular protrusion (112) at equal intervals, and the middle of the shower head (113) is rotationally connected with the annular protrusion (112); the top of the shower head (113) is connected with the adjusting assembly (13) for driving the shower head (113) to rotate around the annular protrusion (112).

5. The cutting dust absorbing device for a laser cutting apparatus according to claim 4, wherein The jet flows generated by two adjacent shower heads (113) form gaps near the shower heads (113).

6. The cutting dust absorbing device for a laser cutting apparatus according to claim 1, wherein The baffle (5) comprises a first plate body (51) and a second plate body (52), and the first plate body (51) and the second plate body (52) are hinged; The telescopic rod (6) is used for synchronously adjusting the distance between the first plate body (51) and the second plate body (52) and the workpiece to be cut, and keeping the first plate body (51) vertical, and the second plate body (52) rotates around the hinge connected with the first plate body (51) under the driving of the telescopic rod (6).

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