Anti-slag-returning laser processing system and laser processing equipment

Abstract

The utility model discloses an anti-slag-returning laser processing system and laser processing equipment, a laser processing head is used for outputting a laser beam, and the laser beam extends along a first direction; the anti-slag-returning assembly comprises an installation structure used for being connected with the spraying end of the laser machining head in an installation mode, a magnetic attraction piece installed on the installation structure and at least one air knife piece, and the laser machining head, the magnetic attraction piece and the air knife pieces are arranged at intervals in the first direction; an air outlet is formed in the air knife piece and used for spraying airflow in the second direction, the airflow is subsonic airflow or supersonic airflow, and an included angle is formed between the first direction and the second direction. And through the arrangement of a double anti-slag-returning structure of the magnetic attraction piece and the air knife, welding slag is prevented from splashing to the laser machining head, the risk that a lens of the laser machining head is polluted is reduced, and therefore the service life of equipment is prolonged, and the laser machining quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser processing technical field especially relates to a kind of anti-back slag laser processing system and laser processing equipment. BACKGROUND

[0002] Laser welding utilizes high-energy laser beam to locally heat materials, causing the materials to melt and form a molten pool. During welding, high-pressure vapor is generated from the metal, which drives the liquid metal to splash and react with air to produce smoke dust. The smoke dust may contaminate the protective lens inside the laser welding head, and in severe cases, cause the lens to burn out and be scrapped, requiring replacement with a new lens for use.

[0003] Currently, laser welding equipment mainly uses air knives to remove welding slag. In low-power scenarios, air knives can provide sufficient welding slag removal effect, but as the laser power increases, the anti-back slag capability of air knives gradually becomes insufficient, which may easily lead to contamination and burning of the lens. SUMMARY

[0004] The utility model aims at providing an anti-back slag laser processing system and laser processing equipment to solve the problem of insufficient anti-back slag capability of air knives in high-power conditions of existing laser welding equipment.

[0005] In a first aspect, the utility model provides an anti-back slag laser processing system, comprising: a laser processing head for outputting a laser beam, the laser beam extending along a first direction; an anti-back slag assembly comprising a mounting structure for mounting connection with a spray end of the laser processing head, and a magnetic attraction member and at least one air knife member mounted on the mounting structure, the laser processing head, the magnetic attraction member and the air knife member being spaced apart along the first direction; the air knife member is provided with an air outlet, and is used for spraying airflow along a second direction, the airflow being subsonic airflow or supersonic airflow, and the first direction and the second direction are arranged at an angle.

[0006] In one embodiment, the mounting structure is in the form of a cylindrical structure, comprising a mounting body and a fixing plate provided on the mounting body, the fixing plate being used for detachable connection with the spray end of the laser processing head, and the mounting structure is provided with a laser channel coaxially arranged with the laser beam.

[0007] In one embodiment, the magnetic attraction member is provided with a plurality of magnetic attraction members, each magnetic attraction member is annularly arranged around the laser channel, and is arranged away from the protective lens of the laser processing head.

[0008] In one embodiment, the cross-sectional dimension of the laser channel gradually decreases along the first direction.

[0009] In one embodiment, the air outlet comprises a converging section, a throat section and a diverging section in sequence, the cross-sectional size of the converging section gradually decreases from the air inlet end to the air outlet end, and the cross-sectional size of the diverging section gradually increases from the air inlet end to the air outlet end; or the cross-sectional size of the air outlet remains unchanged from the air inlet end to the air outlet end.

[0010] In one embodiment, a plurality of air knife members are provided and arranged in sequence along the first direction. In one embodiment, the anti-back-slag assembly further comprises a mounting gasket corresponding to the air knife member, the mounting gasket is provided with a through hole coaxially arranged with the laser beam, and the mounting gasket is arranged on the side of the air knife member away from the magnetic member along the first direction.

[0011] In one embodiment, the width of the air outlet is greater than the aperture of the through hole.

[0012] In one embodiment, the anti-back-slag assembly is mounted and connected to the bottom or side of the jet end of the laser processing head by at least one of the following: a connecting member, a thread, a connecting hole, riveting, a fastener, a sleeve joint or a clamping structure.

[0013] In a second aspect, the utility model also provides a laser processing equipment, including the anti-back-slag laser processing system of any one embodiment.

[0014] The embodiments of the utility model have the following beneficial effects:

[0015] The anti-back-slag laser processing system and the laser processing equipment have the following advantages: the laser processing head outputs laser, the magnetic member and the air knife member are sequentially arranged outside the light path formed by laser along the laser emission direction of the laser processing head, the air outlet of the air knife member faces the laser, the air outlet of the air knife member forms an air curtain, thereby forming an air knife, most of the welding slag can be blown away, the magnetic member generates a magnetic field to adsorb the remaining metal spatter, the double anti-back-slag structure of the magnetic member and the air knife prevents the welding slag from spattering to the laser processing head, reduces the risk of contamination of the lens, prolongs the service life of the equipment and improves the laser processing quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0017] Wherein:

[0018] Figure 1Figure 1 is a schematic view of a slag-proof assembly according to an embodiment.

[0019] Figure 2 Figure 2 is a schematic view of a slag-proof assembly according to an embodiment. Figure 1 Figure 3 is an enlarged schematic view of a first air outlet of the slag-proof assembly shown in Figure 2.

[0020] Figure 3 Figure 4 is a schematic view of a slag-proof assembly according to an embodiment. Figure 1 Figure 5 is an enlarged schematic view of a second air outlet of the slag-proof assembly shown in Figure 4.

[0021] Figure 4 Figure 6 is a schematic view of a slag-proof assembly according to an embodiment.

[0022] Figure 5 Figure 7 is a schematic view of a slag-proof assembly according to an embodiment.

[0023] Figure 6 Figure 8 is a front view of the slag-proof assembly shown in Figure 7. Figure 5

[0024] Figure 9 is a schematic view of a slag-proof assembly according to an embodiment. Figure 7 Figure 6 Figure 10 is a schematic view of a slag-proof assembly according to an embodiment.

[0025] Figure 8 Figure 7 Figure 11 is an enlarged schematic view of a portion B of the slag-proof assembly shown in Figure 10.

[0026] Figure 9 Figure 12 is an enlarged schematic view of a portion C of the slag-proof assembly shown in Figure 10. Figure 7

[0027] Figure 13 is a side view of the slag-proof assembly shown in Figure 10. Figure 10 Figure 5 Figure 14 is a sectional view of the slag-proof assembly shown in Figure 10 along a line D-D.

[0028] Figure 11 Figure 10 Figure 15 is a sectional view of the slag-proof assembly shown in Figure 10 along a line E-E.

[0029] 100, mounting structure; 110, mounting body; 120, fixing plate; 130, magnetic attraction member; 101, laser channel; 200, first air knife member; 210, first air outlet; 300, second air knife member; 310, second air outlet; 311, converging section; 312, throat; 313, diverging section; 314, retaining section; 410, first gasket; 411, first through hole; 420, second gasket; 421, second through hole; 430, mounting post; 500, quick coupling. DETAILED DESCRIPTION

[0030] ​​​​Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0033] Laser welding is a welding method that uses a high-energy laser beam to locally heat a small area of material, and forms a specific molten pool by melting the material with the energy of laser radiation. During welding, due to the high temperature in an instant, the metal will produce a large amount of high-pressure steam, thereby driving the molten liquid metal to fly outward. Moreover, the liquid metal will react with the surrounding air, etc. to produce a large amount of smoke and dust. When the smoke enters the inside of the laser welding head, it may adhere to the inside protective lens, and when the pollution is serious, the protective lens will be damaged and scrapped when the laser transmission is hindered, and a new protective lens must be replaced for normal use.

[0034] Based on this, the utility model discloses a kind of anti-back slag laser processing systems to solve above-mentioned problems.The anti-back slag laser processing system is mainly used to carry out laser welding and other laser processing technology to workpiece.The anti-back slag laser processing system includes laser processing head and is installed on the anti-back slag component of laser processing head, the anti-back slag component includes air knife and magnetic attraction piece, laser jet airflow that laser processing head emits is formed air curtain by air knife, effectively insulates most external dust, grease and other impurities, keep the cleanness of processing environment, further through the magnetic field that magnetic attraction piece forms adsorbs residual metal splashes, prevent welding slag splashes to laser processing head by the double anti-back slag mechanism setting of magnetic attraction piece and air knife, reduce the risk of lens being contaminated, to extend the service life of equipment and improve laser processing quality.

[0035] In some embodiments, referring to Figures 1 to 11 , Figure 1 The direction pointed by arrow X is the second direction, and the direction pointed by arrow Y is the first direction, i.e., the direction of the laser beam emitted by the laser processing head. The anti-back slag laser processing system includes the laser processing head and the anti-back slag component. The laser processing head is configured to output a laser beam, and the laser beam extends along the first direction. The anti-back slag component includes a mounting structure configured to be mounted to the jetting end of the laser processing head, and a magnetic attraction piece 130 and at least one air knife piece mounted to the mounting structure. The laser processing head, the magnetic attraction piece 130, and the air knife piece are arranged along the first direction. The air knife piece is provided with an air outlet, and is configured to jet an airflow along the second direction. The airflow is a subsonic airflow or a supersonic airflow, and the first direction and the second direction are arranged at an angle.

[0036] In the present embodiment, when laser processing is performed, the laser processing head emits a laser beam to form an optical path, and the magnetic attraction piece 130 and the air knife piece are arranged along the laser emission direction of the laser processing head in sequence outside the optical path. The air knife piece jets an airflow towards the direction of the optical path. After the airflow is jetted from the air outlet, an air curtain is formed, thereby forming an air knife. The airflow is a subsonic airflow or a supersonic airflow. Therefore, the air knife is a normal air knife or a supersonic air knife. When the air knife is a supersonic air knife, the slag removal effect is strong, and more than 90% of the welding slag can be blown away. When the air knife is a normal air knife, the slag removal effect is weaker than that of the supersonic air knife, but most of the welding slag can also be removed, thereby ensuring the gas protection effect of the air knife device. At the same time, the air knife can stabilize the metal vapor generated during welding, reduce the influence of the metal vapor on the laser, and improve the stability and accuracy of processing. The magnetic attraction piece arranged above the air knife can form a magnetic field to further adsorb the remaining metal splashes, thereby achieving a good slag removal and dust removal effect of the anti-back slag component. The double anti-back slag structure design of the magnetic attraction piece and the air knife can effectively protect the focusing lens and the processing area, avoid contamination and damage of the workpiece and optical elements caused by welding slag, and improve the stability and accuracy of processing.

[0037] It can be understood that due to the Coanda effect, the airflow sprayed by the air knife member can drive the surrounding air to form an air curtain. The air knife member has a high-speed airflow which can be provided by a high-pressure air pump or the like. After passing through the air knife member, the airflow is blown out in the form of a thin sheet. The high-speed airflow has strong impact force and cutting force, which can effectively blow away the air, dust and welding slag and other impurities around the welding area. In addition, the air knife can also form an isolation air curtain to block external air and impurities from entering the welding area, thereby protecting the weld from oxidation and pollution.

[0038] It can also be understood that the magnetic member 130 has magnetism, and the surface of the magnetic member generates a magnetic field to adsorb the metal splashes that are not blown away by the air knife, thereby avoiding pollution and damage of the workpiece and optical elements caused by the welding slag. The double slag and dust removal effect of the air knife member and the magnetic member can effectively protect the focusing lens and the processing area, avoid pollution and damage of the workpiece and optical elements caused by the welding slag, and improve the stability and precision of the processing.

[0039] In some embodiments, the magnetic member 130 is arranged on at least one side of the light path.

[0040] Specifically, the magnetic member can be arranged in a semi-ring shape, a semi-cylinder shape or any other structure that partially surrounds the light path formed by the laser emitted by the laser processing head. Similarly, the magnetic member can be composed of a magnet or a mounting structure with embedded or sleeved magnetic blocks.

[0041] Specifically, the magnetic member can also be arranged in a ring shape around the light path. The magnetic member can be a circular ring or a cylinder with magnetism. The magnetic member can be made of a circular ring or a cylinder magnet, or can be composed of a circular ring or a cylinder mounting structure with embedded or sleeved magnetic blocks.

[0042] It can be understood that the magnetic member 130 is arranged around the light path formed by the laser emitted by the laser processing head, and the magnetic member 130 forms a ring-shaped magnetic field to adsorb the metal splashes.

[0043] In some embodiments, referring to Figure 5 The mounting structure 100 is in a cylindrical structure, and includes a mounting body 110 and a fixing plate 120 arranged on the mounting body 110. The fixing plate 120 is used for detachable connection with the spraying end of the laser processing head. The mounting structure 100 is provided with a laser channel 101 coaxially arranged with the laser beam emitted by the laser processing head. In this way, the air knife device can be conveniently mounted on the laser processing head.

[0044] Specifically, the fixing plate 120 can be mounted and connected to the bottom of the spraying end of the laser processing head by at least one of a connecting member, a thread, a connecting hole, riveting, a fastener, a sleeving structure or a clamping structure.

[0045] In some embodiments, referring to Figures 1 to 11 The installation body 110 is provided with a plurality of magnetic suction members 130, each of which is annularly arranged on the laser channel 101 and used for magnetically attracting metal splashes. Each magnetic suction member 130 is arranged as far away from the protective lens of the laser processing head as possible. In this way, the wind knife device can increase the adsorption capacity of the metal splashes, avoid damaging the optical device of the laser processing head, and further increase the slag and dust removal effect of the wind knife device.

[0046] It can be understood that the wind knife can remove most of the splashes, protect the lens and the processing area, avoid contamination and damage of the workpiece and optical elements by the welding slag, and stabilize the metal vapor generated in the welding process, reduce the influence of the metal vapor on the laser, and improve the stability and accuracy of the processing. The uppermost magnetic suction member 130 can also adsorb metal splashes, and the wind knife and the magnetic suction member can double the slag removal, so as to achieve the purpose of protecting the lens to the greatest extent in a high-power condition.

[0047] Specifically, the magnetic suction member 130 is a permanent magnet or an electromagnet, and the shape of the magnetic suction member 130 can be any one or more of a square, a tile, a special shape, a cylinder, a ring, a semi-ring, and a disc.

[0048] Specifically, the magnetic suction member 130 can be provided with one annular magnet, and the installation body 110 is provided with a groove for installing the magnet ring. The groove is arranged as far away from the protective lens as possible, so as to form an annular magnetic field to adsorb metal splashes, thereby achieving the purpose of protecting the lens in a high-power condition.

[0049] Specifically, the magnetic suction member 130 can be provided with two magnet rings in the form of a semi-ring, and the installation body 110 is provided with a groove for installing the magnetic suction member 130. The groove is arranged as far away from the protective lens as possible, so as to form an annular magnetic field to adsorb metal splashes, thereby achieving the purpose of protecting the lens in a high-power condition.

[0050] Specifically, the magnetic suction member 130 can be provided with more than three and arranged around the laser channel 101.

[0051] In some embodiments, the cross-sectional size of the laser channel 101 gradually decreases along the laser emission direction of the laser processing head.

[0052] It can be understood that the cross-sectional size of the laser channel 101 gradually decreases along the laser emission direction of the laser processing head, which can limit the size of the laser channel 101 so that as few splashes as possible enter the laser channel, thereby achieving a physical blocking effect.

[0053] In some embodiments, the air knife jetting out supersonic airflow from the air outlet is a supersonic air knife, the supersonic air knife member includes a second air outlet 310, the second air outlet 310 includes a converging section 311, a throat section 312 and a diverging section 313 in sequence, the cross-sectional size of the converging section 311 gradually decreases from the air inlet end to the air outlet end, thus the airflow can be accelerated in the process of passing through the converging section 311 and reach the speed of sound at the throat section 312, the cross-sectional size of the diverging section 313 gradually increases from the air inlet end to the air outlet end, then the airflow can be expanded to a supersonic state in the process of passing through the diverging section 313, the airflow forms an air knife after being jetted out from the second air outlet 310, through the air knife in a supersonic state, most of the welding slag can be blown away, and the slag and dust removal capacity of the second air knife is better.

[0054] In some embodiments, the air knife jetting out subsonic airflow from the air outlet is a supersonic air knife, the ordinary air knife includes a first air outlet 210, the cross-sectional size of the first air outlet 210 remains unchanged from the air inlet end to the air outlet end.

[0055] It can be understood that when the cross-sectional size of the first air outlet 210 remains unchanged from the air inlet end to the air outlet end, the airflow will form a subsonic airflow after being jetted out from the first air outlet 210, thus the first air knife is an ordinary air knife, and the formation of the ordinary air knife mainly utilizes the slit compression of the first air outlet 210 to achieve airflow acceleration to realize the function of the air knife.

[0056] In some embodiments, the air knife member is provided with multiple air knives, and the air knives are sequentially arranged along the emission direction of the laser.

[0057] It can be understood that when the air knife member is provided with multiple air knives, each air knife can jet out airflow through the air outlet to form multiple layers of air curtains to further enhance the blocking force of the welding slag, and thus improve the slag and dust removal effect.

[0058] In some embodiments, the anti-back slag assembly further includes mounting pads, each mounting pad is arranged on the side of each air knife member away from the magnetic member 130 along the first direction. The mounting pad is provided with a through hole coaxially arranged with the light path formed by the laser emitted by the laser processing head.

[0059] It can be understood that the mounting pad can directly physically shield more welding slag.

[0060] In some embodiments, the width of the air outlet of the air knife member is greater than the aperture of the through hole of the mounting pad.

[0061] By such an arrangement, it can be ensured that the air outlet of the air knife member can cover the through hole to avoid the welding slag from splashing towards the laser processing head from the through hole.

[0062] In some embodiments, the anti-back slag assembly is mounted to the bottom or side of the laser processing head spray end by at least one of a connector, a thread, a connecting hole, a rivet, a fastener, a sleeve joint, or a clamping structure.

[0063] In some embodiments, please refer to Figures 1 to 11 , Figure 1 The direction indicated by the arrow X is the second direction, and the direction indicated by the arrow Y is the first direction, i.e., the laser emission direction of the laser processing head.

[0064] The anti-back slag laser processing system includes a laser processing head and an anti-back slag assembly mounted to the spray end of the laser processing head. The anti-back slag assembly includes a magnetic member 130 and at least two layers of air knife members; the at least two layers of air knife members include a first air knife member 200 and a second air knife member 300, the laser processing head, the magnetic member 130, the first air knife member 200, and the second air knife member 300 are arranged along a first direction, and a light path formed by laser emission of the laser processing head extends along the first direction; the first air knife member 200 is provided with a first air outlet 210 and is used to spray a first airflow along a second direction, and the second air knife member 300 is provided with a second air outlet 310 and is used to spray a second airflow along the second direction; wherein the first airflow is a subsonic airflow or a supersonic airflow, the second airflow is a supersonic airflow, and the first direction and the second direction are arranged at an angle.

[0065] In this embodiment, after the first airflow is sprayed from the first air outlet 210, a curtain of gas is formed, thereby forming a first air knife. Since the first airflow is a subsonic airflow or a supersonic airflow, the first air knife is a normal air knife or a supersonic air knife. At the same time, after the second airflow is sprayed from the second air outlet 310, a curtain of gas is also formed, thereby forming a second air knife. Since the second airflow is a supersonic airflow, the second air knife is a supersonic air knife. By means of the supersonic state of the second air knife, most of the welding slag can be blown away. The slag and dust removal capability of the second air knife is good. At the same time, even if part of the welding slag splashes towards the anti-back slag laser processing system through the second air knife, the first air knife is also arranged between the anti-back slag laser processing system and the second air knife. The first air knife can also remove the residual welding slag and dust, thereby ensuring the gas protection effect of the air knife device.

[0066] It can be understood that due to the Coanda effect, the airflow sprayed by the first air outlet 210 or the second air outlet 310 can drive the surrounding air to form an air curtain. The first air outlet 210 and the second air outlet 310 are both communicated with high-speed airflow, which can be provided by a high-pressure fan or the like. The airflow is blown out in the form of a sheet after passing through the first air outlet 210 and the second air outlet 310. The high-speed airflow has strong impact force and cutting force, which can effectively blow away the air, dust and impurities such as welding slag around the welding area. In addition, the air knife can also form an isolation air curtain to block external air and impurities from entering the welding area, thereby protecting the weld from oxidation and pollution.

[0067] In some embodiments, the second air outlet 310 includes a converging section 311, a throat section 312 and a diverging section 313 communicated in sequence. The cross-sectional size of the converging section 311 gradually decreases from the air inlet end to the air outlet end. Therefore, the second airflow can accelerate during the process of passing through the converging section 311 and reach the speed of sound at the throat section 312. The cross-sectional size of the diverging section 313 gradually increases from the air inlet end to the air outlet end. Subsequently, the second airflow can expand to a supersonic state during the process of passing through the diverging section 313. The second airflow forms a second air knife after being sprayed from the second air outlet 310. By means of the second air knife in a supersonic state, most of the welding slag can be blown away. The slag and dust removal capability of the second air knife is good.

[0068] In the present embodiment, the cross-sectional size of the first air outlet 210 remains unchanged from the air inlet end to the air outlet end, or the structure of the first air outlet 210 is the same as that of the second air outlet 310.

[0069] It can be understood that when the cross-sectional size of the first air outlet 210 remains unchanged from the air inlet end to the air outlet end, the first airflow forms a subsonic airflow after being sprayed from the first air outlet 210. Therefore, the first air knife is a normal air knife. The formation of the normal air knife mainly utilizes the slit compression of the first air outlet 210 to achieve airflow acceleration, so as to realize the function of the air knife.

[0070] When the structure of the first air outlet 210 is the same as that of the second air outlet 310, the first airflow forms a supersonic airflow after being sprayed from the first air outlet 210. Therefore, the first air knife can also be a supersonic air knife.

[0071] As can be seen from the above, even if part of the welding slag splashes towards the magnetic member 130 through the first air knife, a first air knife is arranged between the magnetic member 130 and the second air knife. The first air knife can be selected as a normal air knife or a supersonic air knife. The first air knife can also remove residual welding slag and dust, thereby increasing the gas protection effect of the air knife device under high-power conditions.

[0072] In some embodiments, please refer to Figures 5 to 11 The air knife member is provided with a plurality of air knives along the laser emission direction.

[0073] Specifically, the first air knife member 200 is provided in plurality and arranged in sequence between the magnetic attraction member 130 and the second air knife member 300. By the provision of the plurality of first air knife members, a plurality of layers of first air knives can be arranged between the second air knife and the anti-backslag laser processing system, thereby increasing the gas protection effect of the air knife device.

[0074] Further, in the present embodiment, the first air knife member 200 is provided in three, and the second air knife member 300 is provided in one. The first air knife generated by the first air knife member 200 is a subsonic air knife, and the second air knife generated by the second air knife member 300 is a supersonic air knife. The air curtain shielding ability of the supersonic air knife is stronger than that of the subsonic air knife, and thus the slag removal and dust removal are also stronger. Therefore, one supersonic air knife can be equivalent to the dust removal and slag removal ability of multiple subsonic air knives. By providing four layers of air knife members, the gas protection effect of the air knife device can be better guaranteed.

[0075] Specifically, one supersonic air knife can be equivalent to three subsonic air knives. The first air knife member 200 can also be provided in two, four or more. Of course, in other embodiments, in order to further enhance the dust removal and slag removal ability of the air knife device, the second air knife member 300 can also be provided in two or other quantities. The specific arrangement selection and arrangement quantity of a plurality of air knife members can be adaptively adjusted according to the power of the anti-backslag laser processing system and the installation space of the air knife device on the anti-backslag laser processing system.

[0076] In some embodiments, please refer to Figure 1 The light path formed by the emitted laser of the anti-backslag laser processing system extends along a first direction, and the first air outlet 210 and the second air outlet 310 both extend along a second direction and are spaced apart along the first direction, and the first direction and the second direction are arranged at an angle, thereby arranging the first air knife and the second air knife in sequence along the emission direction of the light path formed by the emitted laser of the anti-backslag laser processing system. Figure 1 The direction indicated by the arrow X is the second direction, and the direction indicated by the arrow Y is the first direction.

[0077] In the present embodiment, the second direction is arranged at an angle of -45° to 45° with the horizontal direction, which can realize flexible arrangement of the first air knife and the second air knife. Specifically, the second direction can be arranged at an angle of -45°, -30°, -15°, -5°, 0, 5°, 15°, 30° or 45° with the horizontal direction. When the second direction is arranged at an angle of 0° with the horizontal direction, the second direction is parallel to the horizontal direction, i.e. the first air outlet 210 and the second air outlet 310 both extend along the horizontal direction.

[0078] In some embodiments, please refer to Figures 1 to 4The height dimension H1 of the first air outlet 210 is between 0.05mm and 0.1mm. The first air flow is sprayed through the flat and narrow gap, so that the first air flow can reach a subsonic state, thereby removing slag and dust.

[0079] In the embodiment, the second air outlet 310 further comprises a holding section 314 located at the air inlet end and in communication with the converging section 311. The extension length L1 of the holding section 314 is between 2mm and 4mm, the height dimension H2 is between 5.5mm and 6.5mm, the extension length L2 of the converging section 311 is between 4mm and 6mm, the height dimension H3 of the throat 312 is between 2.5mm and 3.5mm, the extension length L3 of the diverging section 313 is between 3mm and 5mm, and the height dimension H4 of the air outlet end is between 3.5mm and 4.5mm. In this way, the second air outlet 310 can be configured as a flow accelerating structure of a Laval nozzle.

[0080] Specifically, the width dimension W1 of the first air outlet 210 is between 25mm and 35mm. Further, the width dimension W1 of the first air outlet 210 can be selected as 25mm, 28mm, 30mm, 32mm or 35mm. The width dimension W2 of the second air outlet 310 is between 22mm and 26mm. Further, the width dimension W2 of the first air outlet 210 can be selected as 22mm, 23mm, 24mm, 25mm or 26mm.

[0081] In some embodiments, the anti-back slag assembly further comprises a plurality of mounting pads and a plurality of mounting columns 430. Each mounting pad is arranged between the mounting body 110 and the first air knife 200, between two adjacent first air knives 200, between the first air knife 200 and the second air knife 300, and on the side of the second air knife 300 away from the magnetic member 130. Each mounting column 430 is arranged between two adjacent mounting pads. Specifically, the mounting column 430 can be a threaded column. In this way, the mounting stability and reliability of the air knives can be ensured.

[0082] In some embodiments, referring to Figures 5 to 11 Each mounting pad comprises a first pad 410 corresponding to each first air knife 200, and a second pad 420 corresponding to the second air knife 300. The first pad 410 is provided with a first through hole 411 coaxially arranged with the laser channel 101, and the second pad 420 is provided with a second through hole 421 coaxially arranged with the laser channel 101. The aperture of the second through hole 421 is smaller than the aperture of the first through hole 411. The width dimension of the first air outlet 210 is greater than the aperture of the first through hole 411, and the width dimension of the second air outlet 310 is greater than the aperture of the second through hole 421.

[0083] By so arranging, since the aperture of the second through hole 421 is smaller than the aperture of the first through hole 411, the second gasket 420 can directly physically shield more welding slag, and in order to ensure the dust and slag removal effects of the first air knife and the second air knife, the width dimension of the first air outlet 210 is greater than the aperture of the first through hole 411, and the width dimension of the second air outlet 310 is greater than the aperture of the second through hole 421, so as to ensure that the first air knife can cover the first through hole 411 and the second air knife can cover the second through hole 421, so as to avoid that the welding slag splashes to the laser processing head from the first through hole 411 and the second through hole 421.

[0084] In the embodiment, the outlet airflow speed of the supersonic second air knife can be selected as 2 Mach, and the air speed at the first through hole 411 is twice that of the subsonic first air knife.

[0085] In some embodiments, referring to Figure 4 , the spacing dimension H5 between the two adjacent first air outlets 210 and between the first air outlet 210 and the second air outlet 310 is between 35mm and 45mm. By so arranging, not only can the interference between the two adjacent first airflows or between the first airflow and the second airflow be avoided, but also the compact and miniaturized structure of the air knife device can be ensured. It can be understood that if the distance between the two airflows is too close, the airflow will form a vortex when blowing out, and the too close distance will cause the two airflows to collide, affecting the slag and dust removal capacity.

[0086] Specifically, the spacing dimension H5 between the first air outlet 210 and the second air outlet 310 can be selected as 35mm, 38mm, 40mm, 42mm or 45mm.

[0087] In some embodiments, the air knife device further comprises a quick connector 500, and the external air pipe is installed on the air knife member through the quick connector 500 and communicates with the first air outlet 210 or the second air outlet 310.

[0088] In some embodiments, the anti-back slag assembly can be fixed to the laser processing head by at least one of a connecting piece, a thread, a connecting hole, riveting, a fastener, a sleeving structure or a clamping structure.

[0089] According to the second aspect of the utility model, a laser processing equipment is provided, and the laser processing equipment comprises the anti-back slag laser processing system of any one of the above embodiments.

[0090] Since the anti-back slag laser processing system has the above technical effects, the laser processing equipment comprising the anti-back slag laser processing system should also have the same technical effects, which will not be described here again.

[0091] The above disclosed is only the preferred embodiment of the present application, of course, cannot be limited by this to limit the scope of the present application, therefore, the equivalent changes made according to the present application claims, still belong to the scope covered by the present application.

Claims

1. An anti-backslag laser processing system, characterized by, The application relates to a laser processing device. The laser processing device comprises a laser processing head for outputting a laser beam, the laser beam extending along a first direction; a slag-reversing assembly comprising a mounting structure for mounting connection with a spraying end of the laser processing head, and a magnetic suction member and at least one air knife member mounted on the mounting structure, the laser processing head, the magnetic suction member and the air knife member being arranged at intervals along the first direction; the air knife member is provided with an air outlet for spraying air flow along a second direction, the air flow being subsonic or supersonic, and the first direction and the second direction are arranged at an angle. The mounting structure is in a cylindrical structure, and comprises a mounting body and a fixing plate arranged on the mounting body, the fixing plate being used for detachable connection with the spraying end of the laser processing head, and the mounting structure is provided with a laser channel coaxial with the laser beam. The magnetic suction member is provided with a plurality of magnetic suction members, each of which is annularly arranged on the laser channel and away from a protective mirror of the laser processing head.

2. The back-etching resistant laser processing system according to claim 1, characterized by, The cross-sectional size of the laser channel gradually decreases along the first direction.

3. The back-etching resistant laser processing system according to claim 2, characterized by The air outlet comprises a contraction section, a throat section and an expansion section in sequence, the cross-sectional size of the contraction section gradually decreases from an air inlet end to an air outlet end, and the cross-sectional size of the expansion section gradually increases from the air inlet end to the air outlet end; or the cross-sectional size of the air outlet remains unchanged from the air inlet end to the air outlet end.

4. The back-etching resistant laser processing system according to claim 2, wherein The air knife member is provided with a plurality of air knife members and is sequentially arranged along the first direction.

5. The back-etching resistant laser processing system according to claim 1, wherein The slag-reversing assembly further comprises mounting gaskets corresponding to the air knife members, the mounting gaskets are provided with through holes coaxial with the laser beam, and the mounting gaskets are arranged on the side of the air knife members away from the magnetic suction members along the first direction.

6. The back-etching resistant laser processing system according to claim 5, wherein The width of the air outlet is greater than the aperture of the through hole.

7. The back-etching resistant laser processing system of claim 1, wherein, The slag-reversing assembly is mounted on the bottom or side of the spraying end of the laser processing head through at least one of a connecting member, a thread, a connecting hole, riveting, a fastener, sleeve connection or clamping structure.

8. The back-etching resistant laser processing system of claim 7, wherein, The laser processing device comprises the slag-reversing laser processing system according to any one of claims 1 to 9.

9. The back-etching resistant laser processing system of claim 1, wherein, ​ 10. A laser processing apparatus characterized by comprising: ​

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