A laser marking machine and method of use thereof

Abstract

This invention discloses a laser marking machine and its usage method. The laser marking machine includes a worktable, a marking mechanism, and a positioning and dust removal mechanism. The marking mechanism includes a support column, an adjuster, and a marking head. The support column is mounted on the worktable, the adjuster is slidable on the support column, and the marking head is located at one end of the adjuster. The positioning and dust removal mechanism includes a pair of connecting mechanisms, an annular positioning tube, and a pair of hollow tubes. The pair of connecting mechanisms are symmetrically connected to both sides of the marking head. The annular positioning tube is connected to the connecting mechanisms through the hollow tubes and is located directly below the marking head. The focal length of the marking head can be quickly positioned using the connecting mechanisms, the annular positioning tube, and the hollow tubes. This invention combines focal length positioning with fume treatment, which not only improves the focal length positioning efficiency of the laser marking machine but also treats the fume generated during laser marking, preventing fume overflow from polluting the environment or harming the health of workers.

Description

Technical Field

[0001] This invention belongs to the field of laser marking machine technology, specifically relating to a laser marking machine and its usage method. Background Technology

[0002] A laser marking machine is a device that uses a high-energy-density laser beam to permanently mark the surface of various materials. It achieves this by using the thermal or chemical effects generated through the interaction of the laser with the material, causing physical or chemical changes on the material surface and leaving clear and precise marks. These marks can be text, patterns, QR codes, barcodes, etc., and are characterized by permanence, anti-counterfeiting, high precision, and high efficiency. They are widely used in industrial production, electronics, medical, jewelry, handicrafts, food packaging, and other fields.

[0003] When laser marking different workpieces, laser marking machines require refocusing. Currently, focus adjustment in most laser marking machines involves operators manually measuring the distance between the workpiece and the laser marking head's field lens using a ruler or similar measuring tool, and then manually adjusting the laser marking head's height based on the measured distance. While simple, this method is inefficient as it requires manual focus adjustment before each marking operation. To address this, Chinese Patent CN206029012U discloses a laser marking machine that utilizes visible light for laser head positioning, thus saving positioning time. However, in practical use, this device cannot handle the fumes generated during laser marking, leading to fumes spilling out and polluting the environment, while also posing a health risk to workers.

[0004] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a laser marking machine and its usage method.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a laser marking machine and its usage method, which can solve the problem that existing laser marking machines cannot simultaneously and quickly position and handle smoke and dust.

[0007] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution: A laser marking machine includes a worktable, a marking mechanism, and a positioning and dust removal mechanism. The marking mechanism includes a support column, an adjuster, and a marking head. The support column is mounted on the worktable, the adjuster is slidable on the support column, and the marking head is located at one end of the adjuster. The positioning and dust removal mechanism includes a pair of connecting mechanisms, an annular positioning tube, and a pair of hollow tubes. The pair of connecting mechanisms are symmetrically connected to both sides of the marking head. The annular positioning tube is connected to the connecting mechanisms through the hollow tubes and is located directly below the marking head. The focal length of the marking head can be quickly positioned using the connecting mechanisms, the annular positioning tube, and the hollow tubes.

[0008] In one or more embodiments of the present invention, the connecting mechanism includes a pair of connecting plates, a pair of connecting posts, and a reinforcing tube. The connecting plates are detachably connected to the sidewall of the marking head. The pair of connecting posts are respectively connected to the pair of connecting plates. The reinforcing tube is connected between the pair of connecting posts.

[0009] In one or more embodiments of the present invention, the connecting plate is connected to the side wall of the marking head by a pair of bolts, and the side wall of the connecting plate is provided with a clearance groove.

[0010] In one or more embodiments of the present invention, a guide rod is fixedly connected in the clearance groove, the connecting post is slidably disposed on the guide rod, a spring is provided in the clearance groove, the spring is disposed on the upper side of the connecting post and on the outer side of the guide rod.

[0011] In one or more embodiments of the present invention, a pressure sensor is connected to the top wall of the clearance groove, and the pressure sensor corresponds to the spring.

[0012] In one or more embodiments of the present invention, the inner wall of the annular positioning tube is provided with a plurality of circumferentially evenly distributed dust suction holes, and the interior of the hollow tube is connected to the outside through the annular positioning tube and the dust suction holes.

[0013] In one or more embodiments of the present invention, the reinforcing tube is provided with a connector, a connecting tube is connected between a pair of connectors, a filter screen is provided at both ends of the connecting tube, and an air extraction pipe is connected to the connecting tube.

[0014] In one or more embodiments of the present invention, the reinforcing tube is inclinedly disposed on the side wall of the marking head, a material pick-up cap is threadedly connected to the lowest point of the reinforcing tube, and a filler port is provided at the highest point of the reinforcing tube, with a filler cap threadedly connected to the filler port.

[0015] In one or more embodiments of the present invention, the inner wall of the reinforcing tube is provided with an oleophobic layer, and the inner wall of the reinforcing tube is also provided with a plurality of protrusions. A plurality of sedimentation spheres are provided inside the reinforcing tube, each sedimentation sphere comprising a shell, a hollow bubble, and an inner membrane. The sidewall of the shell is provided with a plurality of leakage holes. The hollow bubble is disposed inside the shell. The inner membrane is disposed inside the shell and outside the hollow bubble, and a sedimentation liquid is filled between the inner membrane and the hollow bubble. The inner membrane is provided with capillary pores.

[0016] A method of using a laser marking machine includes the following steps: S1. By symmetrically connecting a pair of connecting mechanisms to the side wall of the marking head, the annular positioning tube can be fixedly connected to the lower side of the marking head. At this time, the distance between the annular positioning tube and the marking head is the focal length of the marking head. S2. When laser marking is performed on different workpieces, the height of the adjustment device and the marking head can be adjusted by the support column. When the annular positioning tube contacts the upper surface of the workpiece, the focal length of the marking head can be adjusted. At the same time, the annular positioning tube can press down on the workpiece to prevent the workpiece from shifting during laser printing. S3. Before laser marking the workpiece, the air extraction pipe needs to be connected to the air extraction mechanism through a pipe. When the air extraction mechanism is running, the air extraction pipe, connecting pipe, a pair of reinforcing pipes, and a pair of hollow pipes will create a negative pressure inside the annular positioning tube. The annular positioning tube will create a negative pressure at the center of the annular positioning tube through multiple evenly distributed dust suction holes around the circumference. S4. Laser marking is performed on the workpiece using an adjuster and a marking head. The smoke and dust generated during laser marking are absorbed by the annular positioning tube and transported through the hollow tube. The temperature of the smoke will decrease when it is transported through the hollow tube. S5. The flue gas inside the hollow tube enters the reinforcing tube, causing the sediment balls to move randomly inside the reinforcing tube. The randomly moving sediment balls collide with the inner wall of the reinforcing tube or multiple protrusions. At this time, the outer shell is deformed by the impact and squeezes the sediment liquid in the inner membrane. The impacted sediment liquid increases the force on the inner membrane and increases the pore size of some capillaries on the inner membrane. Some sediment liquid is discharged from the inner membrane through the capillaries and discharged from the outer shell through the leakage hole into the internal space of the reinforcing tube. The sediment liquid can wrap around and settle the flue gas in the gas, and at the same time, it can further reduce the temperature of the flue gas inside the reinforcing tube. S6. The gas inside the strengthening pipe enters the connecting pipe through the joint, is filtered by the filter screen, and is then drawn by the extraction mechanism through the connecting pipe and the extraction pipe. S7. When the workpiece marking is stopped, rotate to remove the material receiving cover to process the particles in the reinforcing tube. Remove the packing cover and replenish the sediment balls into the reinforcing tube through the packing port.

[0017] Compared with the prior art, the laser marking machine and its method of use of the present invention can combine focal length positioning with fume treatment, which can not only improve the focal length positioning efficiency of the laser marking machine, but also treat the fume generated during the laser marking process, so as to avoid fume overflow and pollution of the environment or harm to the health of workers. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or 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 only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of a laser marking machine according to an embodiment of the present invention; Figure 2 This is a perspective view of the marking mechanism in one embodiment of the present invention; Figure 3 This is a perspective view of the positioning dust removal mechanism in one embodiment of the present invention; Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle; Figure 5 This is a side cross-sectional view of the connecting mechanism in one embodiment of the present invention; Figure 6 for Figure 5 Schematic diagram of the structure at point B; Figure 7 This is a front cross-sectional view of the connecting mechanism in one embodiment of the present invention; Figure 8 for Figure 7 Schematic diagram of the structure at point C; Figure 9 This is a cross-sectional view of the precipitate sphere in one embodiment of the present invention.

[0020] Explanation of key figure labels: 1-Workbench, 2-Marking mechanism, 201-Support column, 202-Regulator, 203-Marking head, 3-Positioning dust removal mechanism, 301-Connecting mechanism, 3011-Connecting plate, 30111-Allowing groove, 3012-Connecting column, 3013-Reinforcing tube, 30131-Connector, 30132-Material pick-up cover, 30133-Filling port, 30134-Filling cover, 30135-Protrusion, 3014-Guide rod, 3015-Spring, 3016-Pressure sensor, 302-Annular positioning tube, 3021-Dust suction hole, 303-Hollow tube, 304-Connecting tube, 3041-Filter screen, 4-Sedimentation ball, 401-Outer shell, 402-Hollow bubble, 403-Inner membrane, 404-Sediment, 405-Leakage hole. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0022] like Figures 1 to 9 As shown, a laser marking machine according to one embodiment of the present invention includes a worktable 1, a marking mechanism 2, and a positioning and dust removal mechanism 3. The marking mechanism 2 includes a support column 201, an adjuster 202, and a marking head 203. The support column 201 is disposed on the worktable 1, the adjuster 202 is slidable on the support column 201, and the marking head 203 is disposed at one end of the adjuster 202. The positioning and dust removal mechanism 3 includes a pair of connecting mechanisms 301, an annular positioning tube 302, and a pair of hollow tubes 303. The pair of connecting mechanisms 301 are symmetrically connected to both sides of the marking head 203. The annular positioning tube 302 is connected to the connecting mechanism 301 through the hollow tubes 303 and is disposed directly below the marking head 203. The focal length of the marking head 203 can be quickly positioned through the connecting mechanism 301, the annular positioning tube 302, and the hollow tubes 303.

[0023] The worktable 1 is used to install the marking mechanism 2 and place the workpiece. The marking mechanism 2 is used to perform laser marking on the workpiece. The support column 201 is used to adjust the vertical height of the adjuster 202 and the marking head 203 so that the focal length of the marking head 203 can fall on the workpiece, ensuring the laser marking effect of the workpiece.

[0024] The positioning and dust removal mechanism 3 is used to quickly position the focal length of the marking head 203 and can absorb the fumes generated during laser marking of the workpiece, preventing fumes from overflowing and polluting the environment, and avoiding harm to the health of workers. The connecting mechanism 301 cooperates with the hollow tube 303 to fix the annular positioning tube 302. When the annular positioning tube 302 is fixed directly below the marking head 203, that is... Figure 1 As shown, the distance between the annular positioning tube 302 and the marking head 203 is the focal length of the marking head 203. When performing laser marking on different workpieces, simply bringing the annular positioning tube 302 into contact with the workpiece is sufficient to achieve the desired focal length for the marking head 203. Compared to existing focal length adjustment methods on the market, the focal length adjustment in this application is simpler and easier to operate.

[0025] Meanwhile, when the annular positioning tube 302 contacts the workpiece, it can also press the workpiece to prevent it from shifting during laser printing, thus ensuring the laser marking effect. In addition, the annular positioning tube 302 can absorb smoke and dust under the action of the extraction mechanism, preventing the smoke and dust from spreading outward and polluting the environment and harming the health of workers. It can also prevent the smoke and dust from floating upward and contaminating the marking head 203.

[0026] Furthermore, this prevents the dust from forming particles that adhere to the workpiece surface after cooling. This avoids the dust particles from altering the surface smoothness of the workpiece or contaminating the already cleaned surface, thus preventing any impact on laser marking.

[0027] The hollow tube 303 is used to fix the annular positioning tube 302, ensuring that the annular positioning tube 302 is stably positioned below the marking head 203, thus positioning the focal length of the marking head 203. At the same time, the hollow tube 303 can also transport the smoke and gas generated during laser treatment of the workpiece, preventing the smoke and gas from overflowing and polluting the environment.

[0028] In this embodiment, both the workbench 1 and the marking mechanism 2 are commercially available products, and can be purchased and used directly in this application.

[0029] In this application, the diameter of the annular positioning tube 302 is larger than the laser marking range of the marking head 203, so as to avoid the annular positioning tube 302 affecting the normal laser marking of the marking head 203.

[0030] Furthermore, the hollow tube 303 is made of a thermally conductive material, such as stainless steel. The basic principle of laser marking on a workpiece is that a high-energy continuous laser beam is generated by a laser generator. The focused laser beam acts on the workpiece surface, causing the surface material to melt and vaporize instantly due to high temperature. This generates a large amount of hot dust during the laser marking process. This application addresses this by using a thermally conductive hollow tube 303, which reduces the temperature of the dust gas as it flows within the tube, thereby allowing the dust gas to form particles.

[0031] like Figures 2 to 8 As shown, the connecting mechanism 301 includes a pair of connecting plates 3011, a pair of connecting posts 3012, and a reinforcing tube 3013. The connecting plates 3011 are detachably connected to the side wall of the marking head 203. The pair of connecting posts 3012 are respectively connected to the pair of connecting plates 3011. The reinforcing tube 3013 is connected between the pair of connecting posts 3012.

[0032] The positioning dust removal mechanism 3 can be detached from the marking head 203 via the detachable connection of the connecting plate 3011, facilitating maintenance of the marking head 203 and / or the positioning dust removal mechanism 3. The reinforcing tube 3013 is connected between a pair of connecting plates 3011 via a connecting post 3012. The reinforcing tube 3013 connects to the hollow tube 303 to fix the annular positioning tube 302 directly below the marking head 203. Simultaneously, the reinforcing tube 3013 can also be used to transport flue gas and temporarily store flue gas particles.

[0033] Specifically, the connecting plate 3011 is connected to the side wall of the marking head 203 by a pair of bolts. Of course, the connecting plate 3011 can also be fixed to the side wall of the marking head 203 by other detachable connection methods.

[0034] like Figures 2 to 8 As shown, the side wall of the connecting plate 3011 is provided with a clearance groove 30111. A guide rod 3014 is fixedly connected in the clearance groove 30111. The connecting column 3012 is slidably mounted on the guide rod 3014. A spring 3015 is provided in the clearance groove 30111. The spring 3015 is located on the upper side of the connecting column 3012 and on the outside of the guide rod 3014.

[0035] The recessed groove 30111 is used to accommodate the connecting post 3012 and the spring 3015. The guide rod 3014 is used to guide the sliding of the connecting post 3012. The spring 3015 is used to apply force to the connecting post 3012 and at the same time, it can make the connecting post 3012 slide in the recessed groove 30111.

[0036] By using the recessed groove 30111, guide rod 3014 and spring 3015, this application can avoid the annular positioning tube 302 from being rigidly squeezed against the workpiece surface, thus avoiding the problem of the hollow tube 303 being bent and broken.

[0037] When the annular positioning tube 302 is in contact with the workpiece surface, if the height of the adjuster 202 and the marking head 203 is continuously lowered, the annular positioning tube 302, through a pair of hollow tubes 303, causes the reinforcing tube 3013 to move the connecting column 3012 upward on the guide rod 3014. This avoids hard compression between the annular positioning tube 302 and the workpiece, ensuring the safety of the hollow tubes 303. Simultaneously, it increases the pressing effect of the annular positioning tube 302 on the workpiece, increasing the workpiece's stability. In other words, during laser marking, the workpiece in this application can be fixed without the use of other clamps or fixing mechanisms, simplifying the operation process and improving marking efficiency.

[0038] Of course, in this application, the sliding distance of the connecting post 3012 on the guide rod 3014 is always within the allowable range of the focal length error of the marking head 203, so it will not affect its marking effect and quality.

[0039] Additionally, a pressure sensor 3016 is connected to the top wall of the clearance groove 30111, corresponding to the spring 3015. The pressure sensor 3016 is electrically connected to the operating unit on the worktable 1. When the connecting column 3012 moves upward along the guide rod 3014, the spring 3015 on the upper side of the connecting column 3012 is compressed, increasing its elastic potential energy. At the same time, the pressure exerted by the spring 3015 on the pressure sensor 3016 increases. The pressure sensor 3016 receives the pressure signal and sends it to the operating unit. The operating unit can then issue an alarm message via an alarm indicator light or alarm to promptly remind the operator that the annular positioning tube 302 is now in close contact with the workpiece, preventing further adjustment of the height of the adjuster 202 and the marking head 203. This ensures the safety of the hollow tube 303 and also guarantees the positioning effect of the focal length of the marking head 203.

[0040] like Figure 3 As shown, the inner wall of the annular positioning tube 302 has multiple circumferentially distributed dust collection holes 3021. The interior of the hollow tube 303 is connected to the outside through the annular positioning tube 302 and the dust collection holes 3021. When a negative pressure is formed inside the annular positioning tube 302, the multiple dust collection holes 3021 can create a negative pressure at the center of the annular positioning tube 302. In this way, when the workpiece is laser marked, the fumes can be quickly drawn in, preventing the fumes from overflowing and polluting the environment or harming the health of the workers.

[0041] like Figures 1 to 8 As shown, the reinforcing pipe 3013 is equipped with a connector 30131, and a connecting pipe 304 is connected between a pair of connectors 30131. Filter screens 3041 are provided at both ends of the connecting pipe 304, and an air extraction pipe is connected to the connecting pipe 304. The air extraction pipe is connected to an air extraction mechanism, such as an air pump, through a pipe.

[0042] Connector 30131 is used for detachable connection of connecting pipe 304. Connecting pipe 304 is used to connect a pair of reinforcing pipes 3013, so that negative pressure is simultaneously formed inside the pair of reinforcing pipes 3013. Filter screen 3041 is used to filter smoke particles to prevent smoke particles from damaging the air extraction mechanism.

[0043] like Figures 1 to 8 As shown, the reinforcing tube 3013 is inclinedly disposed on the side wall of the marking head 203. A material receiving cap 30132 is threadedly connected to the lowest point of the reinforcing tube 3013, and a filling port 30133 is provided at the highest point of the reinforcing tube 3013. A filling cap 30134 is threadedly connected to the filling port 30133. An oleophobic layer is provided on the inner wall of the reinforcing tube 3013, and multiple protrusions 30135 are also provided on the inner wall of the reinforcing tube 3013. Multiple sedimentation balls 4 are provided inside the reinforcing tube 3013.

[0044] The inclined reinforcing tube 3013 collects dust particles, which are then quickly discharged through the receiving cover 30132. The filling port 30133 and filling cover 30134 allow for the addition of sedimentation balls 4 inside the reinforcing tube 3013, enabling the sedimentation of dust particles in the gas and further cooling the air. The oleophobic layer prevents dust particles from adhering to the inner wall of the reinforcing tube 3013, thus preventing blockage. The protrusion 30135 enhances the impact effect of the sedimentation balls 4. The sedimentation balls 4 encapsulate the dust particles in the gas, causing them to settle. Simultaneously, under the influence of the gas inside the reinforcing tube 3013, the sedimentation balls 4 randomly impact the inner wall of the reinforcing tube 3013, causing vibration and further preventing dust particles from adhering to its inner wall.

[0045] The gas transported by the hollow tube 303 enters the reinforcing tube 3013. Since the reinforcing tube 3013 contains multiple sedimentation balls 4, these balls move randomly under the influence of the gas and collide with the inner wall of the reinforcing tube 3013. The collided sedimentation balls 4 release liquid that encapsulates the dust particles in the gas, causing the dust particles to settle. Simultaneously, the random movement of the sedimentation balls 4 causes vibration in the inner wall of the reinforcing tube 3013, thus preventing dust particles from adhering to the inner wall of the reinforcing tube 3013.

[0046] In this embodiment, the inclination angle of the reinforcing tube 3013 is 15-30° to ensure that dust particles can be concentrated at the material receiving cover 30132. When the worker removes the material receiving cover 30132, the dust particles in the reinforcing tube 3013 can be quickly discharged, improving cleaning efficiency.

[0047] In addition, one end of the hollow tube 303 located inside the reinforcing tube 3013 protrudes from the bottom wall, that is... Figure 7 The state shown can prevent dust particles inside the reinforcing tube 3013 from entering the hollow tube 303.

[0048] Specifically, the diameter of the sediment ball 4 is larger than that of the hollow tube 303 to prevent the sediment ball 4 from entering the hollow tube 303 and causing blockage of the hollow tube 303.

[0049] like Figure 8 As shown, the precipitate sphere 4 includes an outer shell 401, a hollow bubble 402, and an inner membrane 403. The outer shell 401 has multiple perforations 405 on its sidewall. The hollow bubble 402 is located inside the outer shell 401. The inner membrane 403 is located inside the outer shell 401 and outside the hollow bubble 402. A precipitate liquid 404 fills the space between the inner membrane 403 and the hollow bubble 402. The inner membrane 403 has capillary pores.

[0050] The outer shell 401 protects the inner membrane 403, while the hollow bubble 402 increases the stress-bearing capacity of the inner membrane 403, preventing it from rupturing upon impact. The inner membrane 403 contains the precipitate 404. The precipitate 404 encapsulates dust particles in the gas, causing them to settle, and can also be used to reduce gas concentration.

[0051] When the precipitating ball 4 moves randomly within the reinforcing tube 3013, the outer shell 401 deforms upon contact with the inner wall or protrusion 30135 of the reinforcing tube 3013. The outer shell 401 can compress the hollow bubbles 402 and the precipitating liquid 404 within the inner membrane 403. The hollow bubbles 402, impacted, move or contract within the inner membrane 403, buffering the impact force. The force exerted by the precipitating liquid 404 on the inner membrane 403 increases, enlarging the pore size of some capillaries on the upper part of the inner membrane 403. At this time, some of the precipitating liquid 404 can be discharged through the capillaries and through the leakage hole 405, exiting the outer shell 401 and entering the internal space of the reinforcing tube 3013, where it comes into contact with the dust in the gas. The precipitating liquid 404 can encapsulate and settle the dust in the gas, achieving a dust removal effect. Simultaneously, it can further reduce the temperature of the dust-laden gas within the reinforcing tube 3013, causing the dust in the gas to form particles.

[0052] In this embodiment, the outer shell 401 is made of a highly tough and wear-resistant elastic material, such as wear-resistant rubber, polyurethane elastomer, or special engineering plastics. The hollow bubble 402 is a closed air bladder or a liquid-filled soft bladder. The inner membrane 403 is made of a silicone rubber microporous membrane, and the precipitate 404 is made of water or a surfactant solution.

[0053] A method of using a laser marking machine includes the following steps: S1. By symmetrically connecting a pair of connecting mechanisms 301 to the side wall of the marking head 203, the annular positioning tube 302 can be fixedly connected to the lower side of the marking head 203, such as... Figure 1 As shown, at this time, the distance between the annular positioning tube 302 and the marking head 203 is the focal length of the marking head 203; S2. When laser marking is performed on different workpieces, the height of the adjuster 202 and the marking head 203 is first adjusted by the support column 201. If the annular positioning tube 302 contacts the upper surface of the workpiece, the focal length of the marking head 203 can be adjusted. At the same time, the annular positioning tube 302 can also press the workpiece to prevent the workpiece from shifting during laser printing. S3. Before laser marking the workpiece, the air extraction pipe needs to be connected to the air extraction mechanism through a pipe. When the air extraction mechanism is running, the air extraction pipe, connecting pipe 304, a pair of reinforcing pipes 3013, and a pair of hollow pipes 303 create a negative pressure inside the annular positioning tube 302. The annular positioning tube 302 creates a negative pressure at the center of the annular positioning tube 302 through multiple evenly distributed dust suction holes 3021. S4. Laser marking is performed on the workpiece using the regulator 202 and the marking head 203. The smoke and dust generated during laser marking are absorbed by the annular positioning tube 302 and transported through the hollow tube 303. The temperature of the smoke will decrease when it is transported in the hollow tube 303. S5. The flue gas inside the hollow tube 303 enters the reinforcing tube 3013, causing the sediment balls 4 to move randomly within the reinforcing tube 3013. The randomly moving sediment balls 4 collide with the inner wall of the reinforcing tube 3013 or multiple protrusions 30135. At this time, the outer shell 401 is deformed by the impact and squeezes the sediment liquid 404 in the inner membrane 403. The impacted sediment liquid 404 increases the force on the inner membrane 403, and increases the pore size of some capillaries on the inner membrane 403. Some of the sediment liquid 404 passes through the capillaries. The fine pores discharge the inner membrane 403 and exit the outer shell 401 through the leakage hole 405 into the internal space of the reinforcing tube 3013, where they come into contact with the dust in the gas. The precipitating liquid 404 can encapsulate and settle the dust in the gas, and at the same time, it can further reduce the temperature of the dust gas inside the reinforcing tube 3013, causing the dust to form particles. Meanwhile, when the precipitating ball 4 moves randomly inside the reinforcing tube 3013, it causes the inner wall of the reinforcing tube 3013 to vibrate. In this way, dust particles can be further prevented from adhering to the inner wall of the reinforcing tube 3013. S6. The gas in the reinforcing pipe 3013 enters the connecting pipe 304 through the connector 30131, and is filtered by the filter screen 3041. After passing through the connecting pipe 304 and the extraction pipe, it is extracted by the extraction mechanism. The filter screen 3041 can also block the sediment ball 4 to prevent the sediment ball 4 from entering the connecting pipe 304. S7. When the workpiece marking is stopped, rotate and remove the material receiving cover 30132 to process the particles in the reinforcing tube 3013. Remove the packing cover 30134 and replenish the sediment balls 4 into the reinforcing tube 3013 through the packing port 30133 to facilitate laser marking again.

[0054] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser marking machine, characterized in that, include: Workbench; The marking mechanism includes a support column, an adjuster, and a marking head. The support column is mounted on the worktable, the adjuster is slidable on the support column, and the marking head is located at one end of the adjuster. The positioning and dust removal mechanism includes a pair of connecting mechanisms, an annular positioning tube, and a pair of hollow tubes. The pair of connecting mechanisms are symmetrically connected to both sides of the marking head. The annular positioning tube is connected to the connecting mechanism through the hollow tube and is located directly below the marking head. The focal length of the marking head can be quickly positioned through the connecting mechanism, the annular positioning tube, and the hollow tube.

2. The laser marking machine according to claim 1, characterized in that, The connecting mechanism includes: A pair of connecting plates are detachably connected to the side wall of the marking head; A pair of connecting posts are respectively connected to a pair of connecting plates; A reinforcing tube is connected between the pair of connecting posts.

3. A laser marking machine according to claim 2, characterized in that, The connecting plate is connected to the side wall of the marking head by a pair of bolts, and the side wall of the connecting plate is provided with a clearance groove.

4. A laser marking machine according to claim 3, characterized in that, A guide rod is fixedly connected inside the clearance groove. The connecting column is slidably mounted on the guide rod. A spring is provided inside the clearance groove. The spring is located on the upper side of the connecting column and on the outer side of the guide rod.

5. A laser marking machine according to claim 4, characterized in that, A pressure sensor is connected to the top wall of the clearance groove, and the pressure sensor corresponds to the spring.

6. A laser marking machine according to claim 2, characterized in that, The inner wall of the annular positioning tube has multiple circumferentially distributed dust suction holes, and the interior of the hollow tube is connected to the outside through the annular positioning tube and the dust suction holes.

7. A laser marking machine according to claim 2, characterized in that, The reinforcing tube is equipped with a connector, and a connecting tube is connected between a pair of connectors. A filter screen is provided at both ends of the connecting tube, and an air extraction pipe is connected to the connecting tube.

8. A laser marking machine according to claim 2, characterized in that, The reinforcing tube is inclinedly disposed on the side wall of the marking head. A material receiving cap is threadedly connected to the lowest point of the reinforcing tube, and a filling port is provided at the highest point of the reinforcing tube. A filling cap is threadedly connected to the filling port.

9. A laser marking machine according to claim 8, characterized in that, The inner wall of the reinforcing tube is provided with an oleophobic layer, and the inner wall of the reinforcing tube is also provided with multiple protrusions. Multiple sediment balls are provided inside the reinforcing tube, and the sediment balls include: The outer casing has multiple perforations on its sidewalls. A hollow bubble is disposed inside the outer shell; An inner membrane is located inside the outer shell and outside the hollow bubble. The space between the inner membrane and the hollow bubble is filled with a precipitate, and the inner membrane has capillary pores.

10. A method of using a laser marking machine as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. By symmetrically connecting a pair of connecting mechanisms to the side wall of the marking head, the annular positioning tube can be fixedly connected to the lower side of the marking head. At this time, the distance between the annular positioning tube and the marking head is the focal length of the marking head. S2. When laser marking is performed on different workpieces, the height of the adjustment device and the marking head can be adjusted by the support column. When the annular positioning tube contacts the upper surface of the workpiece, the focal length of the marking head can be adjusted. At the same time, the annular positioning tube can press down on the workpiece to prevent the workpiece from shifting during laser printing. S3. Before laser marking the workpiece, the air extraction pipe needs to be connected to the air extraction mechanism through a pipe. When the air extraction mechanism is running, the air extraction pipe, connecting pipe, a pair of reinforcing pipes, and a pair of hollow pipes will create a negative pressure inside the annular positioning tube. The annular positioning tube will create a negative pressure at the center of the annular positioning tube through multiple evenly distributed dust suction holes around the circumference. S4. Laser marking is performed on the workpiece using an adjuster and a marking head. The dust generated during laser marking is absorbed by the annular positioning tube and transported through the hollow tube. The temperature of the dust decreases as it is transported through the hollow tube, causing the dust to form particles. At the same time, the irregular movement of the sediment balls inside the reinforcing tube causes the inner wall of the reinforcing tube to vibrate. This prevents dust particles from adhering to the inner wall of the reinforcing tube. S5. The flue gas inside the hollow tube enters the reinforcing tube, causing the sediment balls to move randomly inside the reinforcing tube. The randomly moving sediment balls collide with the inner wall of the reinforcing tube or multiple protrusions. At this time, the outer shell is deformed by the impact and squeezes the sediment liquid in the inner membrane. The impacted sediment liquid increases the force on the inner membrane and increases the pore size of some capillaries on the inner membrane. Some sediment liquid is discharged from the inner membrane through the capillaries and discharged from the outer shell through the leakage hole into the internal space of the reinforcing tube. The sediment liquid can wrap around and settle the flue gas in the gas, and at the same time, it can further reduce the temperature of the flue gas inside the reinforcing tube. S6. The gas inside the strengthening pipe enters the connecting pipe through the joint, is filtered by the filter screen, and is then drawn by the extraction mechanism through the connecting pipe and the extraction pipe. S7. When the workpiece marking is stopped, rotate to remove the material receiving cover to process the particles in the reinforcing tube. Remove the packing cover and replenish the sediment balls in the reinforcing tube through the packing port to facilitate laser marking again.

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