Metal plate laser cutting equipment and using method thereof

Abstract

The invention relates to the technical field of metal plate cutting, in particular to metal plate laser cutting equipment and a using method thereof. The device comprises a base, a workbench is arranged at the top of the base, a pair of symmetrically-arranged lifting seats are installed on the two sides, away from each other, of the workbench, a pair of driving mechanisms arranged at intervals are arranged at the top of the workbench, clamping mechanisms are fixedly connected to one sides of the tops of the two driving mechanisms, and the two clamping mechanisms are symmetrically arranged; a cutting mechanism is arranged between the two lifting seats, and a protective cover is mounted at the top of the workbench; according to the metal plate laser cutting equipment, the two clamping mechanisms are used for fixing a to-be-cut metal plate, the two driving mechanisms are used for driving the metal plate to move to the position below the cutting mechanism, the cutting mechanism is used for cutting the metal plate, and the ventilation mechanism is used for being connected with auxiliary gas output equipment; auxiliary gas is input into the protective cover, and the protective cover is used for preventing the cutting smoke dust from escaping.

Description

Technical Field

[0001] The present invention relates to the technical field of metal plate cutting, and in particular to a metal plate laser cutting device and a use method thereof. Background Art

[0002] Steel sheet is made of stainless steel material through heat treatment and fine grinding. It has the characteristics of high precision, strong tensile strength, good finish, toughness and not easy to break. It is mainly used in: electronic instruments, mold manufacturing, precision machinery, hardware parts, mechanical parts, stamping parts, small hardware manufacturing, etc.

[0003] In the related art, a Chinese patent with announcement number CN117773366B discloses a laser cutting device for engine heat-insulating metal plates, and the key points of its technical solution are: it includes a box body, a frame arranged on the box body, a laser cutting assembly and a driving member arranged on the frame for moving the laser cutting assembly, a workbench is provided on the box body, a strip opening one is symmetrically opened on the workbench, a clamping mechanism is provided in the strip opening one, a cleaning mechanism is provided at the rear end of the workbench, and a driving mechanism is provided in the box body; in this application, the use of the cleaning mechanism can clean the dust on the uncut plate, avoid the phenomenon of dust flying on the surface of the plate when cutting the plate, which makes the operator unable to see the plate cutting clearly, and further facilitates the cutting of the metal plate; at the same time, the debris on the metal plate after cutting can also be cleaned to avoid the cooling metal solution adhering to the metal plate to form burrs, thereby improving the quality of metal plate cutting.

[0004] However, the laser cutting device disclosed in the above patent may encounter the following problems during actual use:

[0005] 1. Although the clamping mechanism can clamp the plate, the shape of the engine heat shield is irregular. More importantly, the thickness of the engine heat shield is thin, usually at the millimeter level. This makes it easy for the irregularly shaped metal plate to pop out from between the two clamps due to uneven force when the clamps are fixing the side edges of the heat shield metal plate, thus affecting the subsequent cleaning and cutting process.

[0006] 2. If the top fixing method is adopted, the cleaning mechanism cannot remove the dust on the surface of the metal sheet at one time, because the dust in the part fixed by the splint will be blocked.

[0007] In view of this, we propose a metal sheet laser cutting device and a method for using the same to improve the deficiencies in the prior art. Summary of the invention

[0008] One of the purposes of the present invention is to provide a metal sheet laser cutting device and a method of using the same, so as to solve the problems mentioned in the above background technology that the thin metal sheet is subjected to uneven force and the dust on the surface of the metal sheet cannot be removed due to being blocked.

[0009] To achieve the above-mentioned object, one of the objects of the present invention is to provide a metal sheet laser cutting device, comprising a base, a workbench is provided on the top of the base, a pair of symmetrically arranged lifting seats are installed on two sides of the workbench away from each other, a pair of spaced driving mechanisms are provided on the top of the workbench, a clamping mechanism is fixedly connected to one side of the top of the two driving mechanisms, the two clamping mechanisms are symmetrically arranged, a cutting mechanism is provided between the two lifting seats, a protective cover is installed on the top of the workbench, a ventilation mechanism is provided at one end of the protective cover, and the cutting mechanism moves synchronously with the ventilation mechanism;

[0010] The two clamping mechanisms are used to fix the metal sheet to be cut, the two driving mechanisms are used to drive the metal sheet to move to the bottom of the cutting mechanism, the cutting mechanism is used to cut the metal sheet, the ventilation mechanism is used to connect the auxiliary gas output device to input the auxiliary gas into the inside of the protective cover, and the protective cover is used to prevent the cutting smoke from escaping;

[0011] The clamping mechanism can ensure that the metal sheet is evenly stressed to prevent the metal sheet from falling off, and the clamping mechanism can reduce the area of ​​the metal sheet surface that is blocked;

[0012] Before cutting the metal sheet, the ventilation mechanism is used to remove impurities on the surface of the metal sheet;

[0013] During the process of cutting the metal sheet, the protective cover is used to gather the temperature near the cutting part, and the ventilation mechanism can simultaneously remove the cutting slag on the surface of the metal sheet;

[0014] After the cutting is completed, the ventilation mechanism is used to cool the cutting site.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the metal sheet laser cutting equipment, two clamping mechanisms are provided to fix the metal sheet to be cut, two driving mechanisms are provided to drive the metal sheet to move to the bottom of the cutting mechanism, the cutting mechanism is used to cut the metal sheet, the ventilation mechanism is used to connect the auxiliary gas output device to input the auxiliary gas into the inside of the protective cover, and the protective cover is used to prevent the escaping of cutting smoke.

[0017] 2. In the metal sheet laser cutting equipment, the clamping mechanism can ensure that the metal sheet is evenly stressed to prevent the metal sheet from falling off, and the clamping mechanism can reduce the area of ​​the metal sheet surface that is blocked. Before cutting the metal sheet, the ventilation mechanism is used to remove impurities on the surface of the metal sheet; during the cutting of the metal sheet, the protective cover is used to gather the temperature near the cutting part, and the ventilation mechanism can simultaneously remove the cutting slag on the surface of the metal sheet; after the cutting is completed, the ventilation mechanism is used to cool the cutting part.

[0018] On the basis of the above technical solution, the present invention can also make the following improvements:

[0019] As a further improvement of the technical solution, a processing groove is opened on the top of the protective cover, and the processing groove is located below the cutting mechanism. The top of the workbench and the interior of the protective cover form a cutting chamber.

[0020] The beneficial effect of adopting the above-mentioned improvement scheme is that the laser cutting protective cover is usually a relatively closed structure, which surrounds the cutting area when cutting metal sheets. The protective cover is usually equipped with a special ventilation system, which can generate a directional airflow to prevent the cutting smoke from escaping into the working environment.

[0021] Furthermore, the protective cover reduces air convection between the cutting area and the external environment, and the inner wall material of some protective covers has good heat reflection performance, which enables the protective cover to help the temperature gather at the cutting point.

[0022] As a further improvement of the technical solution, the driving mechanism includes a slide rail fixedly connected to the top of the workbench, and a slide seat is slidably connected to the top of the slide rail.

[0023] As a further improvement of the technical solution, the slide seat is internally rotatably connected with a plurality of pulleys, one of which is driven by a servo motor.

[0024] The beneficial effect of adopting the above-mentioned improvement scheme is that after the power is turned on, the pulley coaxially connected to the servo motor and its own output shaft rotates, and under the action of the friction between the pulley and the slide rail, the slide moves along the track of the slide rail to realize the transportation of the metal plate to be cut.

[0025] As a further improvement of the present technical solution, the clamping mechanism includes a U-shaped seat fixedly connected to one side of the sliding seat, the openings of the two U-shaped seats are facing opposite each other, the U-shaped seat includes two limit plates arranged upper and lower, a plurality of guide rods are fixedly connected between the two limit plates, a pressure plate is slidably connected to the plurality of guide rods, a plurality of springs are fixedly connected between the pressure plate and the limit plate located above, and each of the springs is correspondingly sleeved on the outer periphery of the guide rod.

[0026] As a further improvement of the technical solution, a plurality of fixing columns are fixedly connected to the bottom of the guide rod, and the plurality of fixing columns are distributed in an array at the bottom of the guide rod.

[0027] As a further improvement of the technical solution, the radius of the fixing column gradually decreases from top to bottom, and the material of the fixing column is a flexible material.

[0028] The beneficial effect of adopting the above-mentioned improved scheme is that when the pressure plate is pushed to slide upward along the guide rod, the spring is compressed, and the metal sheet to be cut is placed between the lower limit plate and the pressure plate, and then the pressure plate is released. Then, under the action of the spring restoring force, the pressure plate tends to return to its original position, thereby clamping the metal sheet.

[0029] As a further improvement of the present technical solution, the cutting mechanism includes a guide rail fixedly connected between two lifting seats, a rack fixedly connected to the top of the guide rail, a mounting seat slidably connected to one side of the guide rail, a gear is provided on the inner top wall of the mounting seat, the gear is meshed with the rack, the gear is driven by a servo motor, a laser emitter is provided on one side of the mounting seat, and the laser emitter is located above the processing groove.

[0030] The beneficial effect of adopting the above-mentioned improvement scheme is that when the laser beam is focused on the surface of the metal sheet, the temperature of the surface of the metal sheet will rise sharply in a very short time due to the high energy density of the laser. The laser beam can quickly make the metal reach above the melting point, causing the metal material to begin to melt. With the continuous input of laser energy, the temperature rises further and part of the metal will vaporize.

[0031] As a further improvement of the present technical solution, the ventilation mechanism includes a connecting rod, a gas collecting hood and a plurality of limit rods, one end of the connecting rod is fixedly connected to the laser emitter, the end of the connecting rod away from the laser emitter is fixedly connected to the gas collecting hood, a plurality of the limit rods are arranged side by side on the inner wall of the cutting chamber, the gas collecting hood is slidably connected to the plurality of limit rods, a fan blade is provided in the gas collecting hood, the gas collecting hood is funnel-shaped, the large mouth end of the gas collecting hood faces the inside of the cutting chamber, and the small mouth end of the gas collecting hood is connected to an output device for auxiliary gas.

[0032] The beneficial effect of adopting the above-mentioned improvement scheme is that the small mouth end of the gas collecting hood is connected to the external auxiliary gas output device. Before the laser emitter is turned on, the fan blade is started in advance, which sprays the auxiliary gas into the cutting chamber. On the one hand, it discharges the air in the cutting chamber; on the other hand, it removes dust and other impurities attached to the surface of the metal plate, creating a stable environment for subsequent cutting of the metal plate.

[0033] A second object of the present invention is to provide a method for a metal sheet laser cutting device, comprising the following steps:

[0034] S1. Fix the thin metal sheet to be cut between two clamping mechanisms;

[0035] S2, two driving mechanisms drive the fixed metal sheet to move to the bottom of the cutting mechanism;

[0036] S3, the cutting mechanism moves along the track inside the processing groove to cut the metal plate;

[0037] S4, the ventilation mechanism introduces auxiliary gas into the cutting chamber. Before cutting, the auxiliary gas removes dust on the surface of the metal plate. During the cutting process, the auxiliary gas can simultaneously remove cutting slag on the surface of the metal plate. After cutting, the auxiliary gas is used to cool the cut part on the metal plate.

[0038] S5. Remove the cut metal sheet, reset the two driving mechanisms, and repeat the above steps S1-S4. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0040] Figure 2 It is a partially cut-away left view of the present invention;

[0041] Figure 3 It is a local structural stereogram of the present invention;

[0042] Figure 4 It is a front view of a partial structure of the present invention;

[0043] Figure 5 It is a three-dimensional structural diagram of the driving mechanism of the present invention;

[0044] Figure 6 It is a front structural diagram of the driving mechanism of the present invention;

[0045] Figure 7 It is a three-dimensional structural diagram of the clamping mechanism of the present invention;

[0046] Figure 8 It is a front structural diagram of the clamping mechanism of the present invention;

[0047] Fig. 9 It is a three-dimensional structural diagram of the cutting mechanism of the present invention;

[0048] Fig.10 For the present invention Figure 2 The enlarged view of point A in the middle;

[0049] Fig.11 It is a cutaway perspective view of the ventilation mechanism of the present invention;

[0050] Fig.12This is the second cutaway perspective view of the ventilation mechanism of the present invention.

[0051] The meaning of each number in the figure is:

[0052] 100, base; 110, workbench; 120, lifting seat; 130, protective cover; 131, processing tank; 132, cutting chamber

[0053] 200, driving mechanism; 210, slide rail; 220, slide seat; 230, pulley;

[0054] 300, clamping mechanism; 310, U-shaped seat; 320, guide rod; 330, pressure plate; 340, spring; 350, fixing column;

[0055] 400, cutting mechanism; 410, guide rail; 420, rack; 430, mounting seat; 440, gear; 450, laser transmitter; 500, ventilation mechanism; 510, connecting rod; 520, limiting rod; 530, air collecting hood; 540, fan blade. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] Example 1: Please refer to Figure 1-Figure 4As shown, the purpose of this embodiment is to provide a metal plate laser cutting device, including a base 100, a workbench 110 is provided on the top of the base 100, a pair of symmetrically arranged lifting seats 120 are installed on two sides of the workbench 110 that are far away from each other, a pair of spaced driving mechanisms 200 are provided on the top of the workbench 110, one side of the top of the two driving mechanisms 200 is fixedly connected with a clamping mechanism 300, the two clamping mechanisms 300 are symmetrically arranged, a cutting mechanism 400 is provided between the two lifting seats 120, a protective cover 130 is installed on the top of the workbench 110, a ventilation mechanism 500 is provided at one end of the protective cover 130, and the cutting mechanism 400 moves synchronously with the ventilation mechanism 500;

[0060] The two clamping mechanisms 300 are used to fix the metal sheet to be cut, the two driving mechanisms 200 are used to drive the metal sheet to move to the bottom of the cutting mechanism 400, the cutting mechanism 400 is used to cut the metal sheet, the ventilation mechanism 500 is used to connect the auxiliary gas output device to input the auxiliary gas into the inside of the protective cover 130, and the protective cover 130 is used to prevent the cutting smoke from escaping;

[0061] The clamping mechanism 300 can ensure that the metal sheet is evenly stressed to prevent the metal sheet from falling off, and the clamping mechanism 300 can reduce the area of ​​the metal sheet surface that is blocked;

[0062] Before cutting the metal sheet, the ventilation mechanism 500 is used to remove impurities on the surface of the metal sheet;

[0063] During the process of cutting the metal sheet, the protective cover 130 is used to gather the temperature near the cutting part, and the ventilation mechanism 500 can simultaneously remove the cutting slag on the surface of the metal sheet;

[0064] After the cutting is completed, the ventilation mechanism 500 is used to cool the cutting site.

[0065] A processing groove 131 is formed on the top of the protective cover 130 . The processing groove 131 is located below the cutting mechanism 400 . The top of the workbench 110 and the interior of the protective cover 130 form a cutting chamber 132 .

[0066] The principle of the protective cover 130 to prevent the escape of cutting fumes:

[0067] (1) Closed space limitation: The laser cutting protective cover 130 is usually a relatively closed structure, which surrounds the cutting area when cutting metal sheets. For example, the surroundings and top of the protective cover 130 are sealed or semi-sealed, leaving only necessary openings (i.e., processing slots 131) for the entry of laser beams, observation windows, and access to auxiliary gas pipelines (i.e., gas collecting cover 530 hereinafter). Such a closed space is like a container, which limits the path for smoke and dust to diffuse to the outside.

[0068] (2) Airflow guidance: The protective cover 130 is usually equipped with a special ventilation system that can generate directional airflow. During the cutting process, airflow flows in from one side of the cutting area and carries the smoke and dust to the air outlet of the ventilation system. The air outlet can be connected to a smoke and dust filter device, so that the smoke and dust can be effectively collected to prevent it from escaping into the working environment.

[0069] The principle of the protective cover 130 helping the temperature to gather at the cutting point:

[0070] (1) Reduce heat loss through convection: The protective cover 130 reduces air convection between the cutting area and the outside environment. Without the protective cover 130, the high temperature generated during the cutting process will rapidly heat up the air around the cutting area, and this hot air will convect with the cooler air around it, causing rapid heat loss. The protective cover 130 forms a relatively independent space, blocking a large amount of exchange between the cold air outside and the hot air in the cutting area, allowing heat to accumulate near the cutting area.

[0071] (2) Reflecting thermal radiation: The inner wall material of some parts of the protective cover 130 has good thermal reflection performance. When the thermal radiation (such as infrared rays, etc.) generated by cutting propagates to the surroundings, the thermal radiation will be reflected back to the cutting area by the inner wall of the protective cover 130. For example, the inner wall with a metal coating can effectively reflect thermal radiation, just like a mirror reflects light, and re-gather the heat at the cutting point and its vicinity, which is conducive to maintaining the high temperature state of the cutting area and improving the cutting efficiency.

[0072] Working principle:

[0073] First, the thin metal plate to be cut is fixed between two clamping mechanisms 300 .

[0074] Then, the driving mechanisms 200 are started, and the two driving mechanisms 200 drive the fixed metal sheet to move to the bottom of the cutting mechanism 400 .

[0075] At this time, the cutting mechanism 400 moves along the track inside the processing groove 131 to cut the metal plate.

[0076] During this period, the ventilation mechanism 500 introduces auxiliary gas into the cutting chamber 132. Before cutting, the auxiliary gas removes dust on the surface of the metal plate. During the cutting process, the auxiliary gas can simultaneously remove the cutting slag on the surface of the metal plate. After cutting is completed, the auxiliary gas is used to cool the cut part on the metal plate.

[0077] Finally, the cut metal sheet is removed, the two driving mechanisms 200 are reset, and the above steps are repeated.

[0078] Next, the working principle of each component and the preferred effects brought by the technical solution are described in detail in conjunction with the accompanying drawings:

[0079] like Figure 5 and Figure 6 As shown, the driving mechanism 200 includes a slide rail 210 fixedly connected to the top of the workbench 110 , and a slide seat 220 is slidably connected to the top of the slide rail 210 .

[0080] The improvement lies in that: the slide seat 220 is internally rotatably connected with a plurality of pulleys 230 , one of which is driven by a servo motor.

[0081] That is to say, after the power is turned on, the pulley 230 coaxially connected to the servo motor and its own output shaft rotates, and under the action of the friction between the pulley 230 and the slide rail 210, the slide 220 moves along the track of the slide rail 210 to realize the transportation of the metal plate to be cut.

[0082] In the above background technology, although the two clamps can clamp the plate, the shape of the engine heat insulation plate is irregular, and more importantly, the thickness of the engine heat insulation plate is relatively thin, usually at the millimeter level. This makes it easy for the irregularly shaped metal plate to pop out from between the two clamps due to uneven force when the clamp is fixing the side edge of the heat-insulating metal plate, thereby affecting the subsequent cleaning and cutting process. Therefore, the clamping mechanism 300 in the present application adopts a top fixing method, which can ensure that the clamped metal plate is evenly stressed, and at the same time improve the contact part between the clamping mechanism 300 and the metal plate to reduce the area of ​​the metal plate surface that is blocked.

[0083] exist Figure 7 and Figure 8 In the figure, the clamping mechanism 300 includes a U-shaped seat 310 fixedly connected to one side of the sliding seat 220, the openings of the two U-shaped seats 310 are facing each other, the U-shaped seat 310 includes two limit plates arranged upper and lower, a plurality of guide rods 320 are fixedly connected between the two limit plates, a pressure plate 330 is slidably connected to the plurality of guide rods 320, a plurality of springs 340 are fixedly connected between the pressure plate 330 and the limit plate located above, and each spring 340 is correspondingly sleeved on the outer periphery of the guide rod 320.

[0084] Furthermore, a plurality of fixing columns 350 are fixedly connected to the bottom of the guide rod 320 , and the plurality of fixing columns 350 are distributed in an array at the bottom of the guide rod 320 .

[0085] Furthermore, the radius of the fixing column 350 gradually decreases from top to bottom, and the material of the fixing column 350 is a flexible material.

[0086] It should be noted that first, the pressure plate 330 is pushed to slide upward along the guide rod 320. At this time, the spring 340 is compressed, and the metal sheet to be cut (which may have uneven shapes and thin thicknesses due to different uses) is placed between the lower limit plate and the pressure plate 330. Then the pressure plate 330 is released. Under the action of the restoring force of the spring 340, the pressure plate 330 tends to return to its original position, thereby clamping the metal sheet.

[0087] like Fig. 9 and Fig.10 As shown, the cutting mechanism 400 includes a guide rail 410 fixedly connected between two lifting seats 120, a rack 420 is fixedly connected to the top of the guide rail 410, a mounting seat 430 is slidably connected to one side of the guide rail 410, a gear 440 is provided on the inner top wall of the mounting seat 430, the gear 440 is meshed with the rack 420, the gear 440 is driven by a servo motor, a laser emitter 450 is provided on one side of the mounting seat 430, and the laser emitter 450 is located above the processing groove 131.

[0088] Moreover, after the power is turned on, the servo motor drives the gear 440 coaxially connected to its own output shaft to rotate. Under the action of the driving force between the gear 440 and the rack 420, the gear 440 drives the mounting base 430 to move along the line of the guide rail 410, so the laser emitter 450 also cuts the metal sheet along the travel line of the guide rail 410.

[0089] The principle of laser generation:

[0090] (1) The laser transmitter 450 is mainly composed of three parts: a laser medium, an excitation source, and an optical resonant cavity. Taking a common fiber laser as an example, in a fiber laser, the laser medium is an optical fiber doped with rare earth elements (such as ytterbium, erbium, etc.). The excitation source is usually a high-power semiconductor laser, which inputs energy into the laser medium. When the energy provided by the excitation source is absorbed by the laser medium, the particles (such as atoms, ions, etc.) in the laser medium will transition from a low energy level to a high energy level, forming a particle population inversion distribution state.

[0091] (2) The optical resonant cavity is composed of a pair of mirrors located at both ends of the laser medium. When particles at a high energy level transition to a low energy level, photons are released. These photons reflect back and forth in the optical resonant cavity, constantly interacting with particles in a state of population inversion, triggering a stimulated radiation process. Through this process, the number of photons will continue to increase, and under the action of the optical resonant cavity, the frequency, phase and other characteristics of the photons become highly consistent, ultimately forming a high-energy density, high-directional laser beam output from the resonant cavity.

[0092] The principle of laser cutting of metal sheets:

[0093] (1) Melting and vaporization: When the laser beam is focused on the surface of the metal sheet, due to the high energy density of the laser (generally up to 10 6 -10 7 W / cm 2 ) characteristics, the temperature of the metal sheet surface will rise sharply in a very short time. Taking carbon steel as an example, its melting point is around 1400-1500℃. The laser beam can quickly make the metal reach above the melting point, causing the metal material to begin to melt. With the continuous input of laser energy, the temperature rises further and part of the metal will vaporize. For example, when laser cutting carbon steel with a thickness of 5-10mm, under the action of the laser beam, the metal material in the cutting area will undergo the process of melting and vaporization in succession.

[0094] (2) Slag removal process: In order to discharge the melted and vaporized metal material (slag) out of the cutting area, the ventilation mechanism 500 is connected to the auxiliary gas output device, and the ventilation mechanism 500 sprays the auxiliary gas into the cutting area.

[0095] Based on the above laser beam cutting of metal sheets, the following Fig.11 and Fig.12 The function of the ventilation mechanism 500 is explained. The ventilation mechanism 500 includes a connecting rod 510, a gas collecting hood 530 and a plurality of limit rods 520. One end of the connecting rod 510 is fixedly connected to the laser emitter 450, and the end of the connecting rod 510 away from the laser emitter 450 is fixedly connected to the gas collecting hood 530. The plurality of limit rods 520 are arranged side by side on the inner wall of the cutting chamber 132. The gas collecting hood 530 is slidably connected to the plurality of limit rods 520. A fan blade 540 is arranged in the gas collecting hood 530. The gas collecting hood 530 is funnel-shaped. The large mouth of the gas collecting hood 530 faces the inside of the cutting chamber 132, and the small mouth of the gas collecting hood 530 is connected to the output device of the auxiliary gas.

[0096] That is to say, the small mouth of the gas collecting hood 530 is connected to an external auxiliary gas output device. Before the laser emitter 450 is turned on, the fan blade 540 is started in advance to spray the auxiliary gas into the cutting chamber 132. On the one hand, it discharges the air in the cutting chamber 132; on the other hand, it removes dust and other impurities attached to the surface of the metal plate, creating a stable environment for subsequent cutting of the metal plate.

[0097] When the laser emitter 450 is turned on, if the material being cut is carbon steel or other materials, oxygen is often used as an auxiliary gas. Oxygen can not only blow away the slag, but also react chemically with the metal at high temperature to release more heat, further promoting the cutting process. For some easily oxidized metal materials (such as aluminum alloys), inert gases such as nitrogen are usually used as auxiliary gases. Their main function is to blow away the slag and prevent the metal from being oxidized during the cutting process. Moreover, the gas collecting hood 530 where the fan blades 540 are located moves synchronously with the laser emitter 450 (driven by the connecting rod 510 and sliding along the limit rod 520).

[0098] Embodiment 2: This embodiment is based on the content provided in Embodiment 1, and aims to provide a method for a metal sheet laser cutting device, and the specific steps are as follows:

[0099] S1. Move the pressing plate 330 to slide upward along the guide rod 320. At this time, the spring 340 is compressed. The metal sheet to be cut is placed between the lower limit plate and the pressing plate 330. Then, the pressing plate 330 is released. Under the action of the restoring force of the spring 340, the pressing plate 330 tends to return to its original position, thereby clamping the metal sheet.

[0100] S2. After the power is turned on, the pulley 230 coaxially connected to the servo motor and its own output shaft rotates. Under the action of the friction between the pulley 230 and the slide rail 210, the slide seat 220 moves along the track of the slide rail 210 to realize the transportation of the metal plate to be cut.

[0101] S3. Start the laser emitter 450, which generates a laser beam and focuses it on the surface of the metal sheet. The servo motor drives the gear 440 coaxially connected to its own output shaft to rotate. Under the action of the driving force between the gear 440 and the rack 420, the gear 440 drives the mounting base 430 to move along the line of the guide rail 410, so that the laser emitter 450 also cuts the metal sheet along the travel line of the guide rail 410.

[0102] S4. Before the laser emitter 450 is turned on, the fan blade 540 is started in advance to spray auxiliary gas into the cutting chamber 132. On the one hand, it discharges the air in the cutting chamber 132; on the other hand, it removes dust and other impurities attached to the surface of the metal plate, creating a stable environment for subsequent cutting of the metal plate.

[0103] S5. Remove the cut metal sheet, reset the two slide seats 220 on the top of the corresponding slide rails 210, and repeat the above steps S1-S4.

[0104] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A metal sheet laser cutting device, characterized in that: The invention comprises a base (100), a workbench (110) is provided on the top of the base (100), a pair of symmetrically arranged lifting seats (120) are installed on two sides of the workbench (110) that are far away from each other, a pair of spaced driving mechanisms (200) are provided on the top of the workbench (110), a clamping mechanism (300) is fixedly connected to one side of the top of the two driving mechanisms (200), the two clamping mechanisms (300) are symmetrically arranged, a cutting mechanism (400) is provided between the two lifting seats (120), a protective cover (130) is installed on the top of the workbench (110), a ventilation mechanism (500) is provided at one end of the protective cover (130), and the cutting mechanism (400) moves synchronously with the ventilation mechanism (500); The two clamping mechanisms (300) are used to fix the metal sheet to be cut, the two driving mechanisms (200) are used to drive the metal sheet to move below the cutting mechanism (400), the cutting mechanism (400) is used to cut the metal sheet, the ventilation mechanism (500) is used to connect the auxiliary gas output device to input the auxiliary gas into the inside of the protective cover (130), and the protective cover (130) is used to prevent the escaping of cutting smoke; The clamping mechanism (300) can ensure that the metal sheet is evenly stressed to prevent the metal sheet from falling off, and the clamping mechanism (300) can reduce the area of ​​the metal sheet surface that is blocked; Before cutting the metal sheet, the ventilation mechanism (500) is used to remove impurities on the surface of the metal sheet; During the process of cutting the metal plate, the protective cover (130) is used to gather the temperature near the cutting part, and the ventilation mechanism (500) can simultaneously remove the cutting slag on the surface of the metal plate; After the cutting is completed, the ventilation mechanism (500) is used to cool the cutting part.

2. The metal sheet laser cutting equipment according to claim 1, characterized in that: A processing groove (131) is provided on the top of the protective cover (130), and the processing groove (131) is located below the cutting mechanism (400). The top of the workbench (110) and the interior of the protective cover (130) form a cutting chamber (132).

3. The metal sheet laser cutting equipment according to claim 1, characterized in that: The driving mechanism (200) comprises a slide rail (210) fixedly connected to the top of the workbench (110), and a slide seat (220) is slidably connected to the top of the slide rail (210).

4. The metal sheet laser cutting equipment according to claim 3, characterized in that: A plurality of pulleys (230) are rotatably connected inside the slide seat (220), and one of the pulleys (230) is driven by a servo motor.

5. The metal sheet laser cutting equipment according to claim 3, characterized in that: The clamping mechanism (300) comprises a U-shaped seat (310) fixedly connected to one side of the sliding seat (220), the openings of the two U-shaped seats (310) face each other, the U-shaped seat (310) comprises two upper and lower limit plates, a plurality of guide rods (320) are fixedly connected between the two limit plates, a pressure plate (330) is slidably connected to the plurality of guide rods (320), a plurality of springs (340) are fixedly connected between the pressure plate (330) and the limit plate located above, and each of the springs (340) is correspondingly sleeved on the periphery of the guide rod (320).

6. The metal sheet laser cutting device according to claim 5, characterized in that: A plurality of fixing columns (350) are fixedly connected to the bottom of the guide rod (320), and the plurality of fixing columns (350) are distributed in an array at the bottom of the guide rod (320).

7. The metal sheet laser cutting device according to claim 6, characterized in that: The radius of the fixing column (350) gradually decreases from top to bottom, and the material of the fixing column (350) is a flexible material.

8. The metal sheet laser cutting equipment according to claim 2, characterized in that: The cutting mechanism (400) includes a guide rail (410) fixedly connected between two lifting seats (120), a rack (420) fixedly connected to the top of the guide rail (410), a mounting seat (430) slidably connected to one side of the guide rail (410), a gear (440) is provided on the inner top wall of the mounting seat (430), the gear (440 is meshed with the rack (420), the gear (440) is driven by a servo motor, and a laser emitter (450) is provided on one side of the mounting seat (430), and the laser emitter (450) is located above the processing groove (131).

9. The metal sheet laser cutting device according to claim 8, characterized in that: The ventilation mechanism (500) includes a connecting rod (510), a gas collecting hood (530) and a plurality of limiting rods (520), one end of the connecting rod (510) is fixedly connected to the laser emitter (450), and the end of the connecting rod (510) away from the laser emitter (450) is fixedly connected to the gas collecting hood (530), and the plurality of limiting rods (520) are arranged side by side on the inner wall of the cutting chamber (132), and the gas collecting hood (530) is slidably connected to the plurality of limiting rods (520), and a fan blade (540) is arranged in the gas collecting hood (530), and the gas collecting hood (530) is funnel-shaped, and the large end of the gas collecting hood (530) faces the inside of the cutting chamber (132), and the small end of the gas collecting hood (530) is connected to an output device for auxiliary gas.

10. A method for using the metal sheet laser cutting device as claimed in any one of claims 2 to 9, characterized in that: The following steps are involved: S1, fixing the thin metal sheet to be cut between two clamping mechanisms (300); S2, the two driving mechanisms (200) drive the fixed metal plate to move below the cutting mechanism (400); S3, the cutting mechanism (400) moves along the track inside the processing groove (131) to cut the metal plate; S4, the ventilation mechanism (500) introduces auxiliary gas into the cutting chamber (132), and before cutting, the auxiliary gas removes dust on the surface of the metal plate, and during the cutting process, the auxiliary gas can simultaneously remove cutting slag on the surface of the metal plate, and after cutting is completed, the auxiliary gas is used to cool the cut part of the metal plate; S5, remove the cut metal sheet, reset the two driving mechanisms (200), and repeat the above steps S1-S4.

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