Laser cutting device of numerical control machine tool

Abstract

The invention provides a laser cutting device of a numerical control machine tool, and relates to the field of laser cutting. The supporting table is arranged on the frame body and used for supporting and fixing a product to be cut; the laser emitting device is movably arranged on the frame body and used for conducting laser cutting on the product on the supporting table; the cover body is arranged on the laser emitting device and used for being attached to the product so that the cover body and the product can form an isolation cavity, and the laser emitted by the laser emitting device is located in the isolation cavity; wherein the laser emitting device is provided with an air blowing opening, the air blowing opening is located in the cover body and used for blowing airflow to the contact area of the product and the laser, the cover body is connected with an air outlet so that the airflow in the isolation cavity can be discharged out of the cover body, and the air pressure in the isolation cavity is larger than the external atmospheric pressure. Compared with the prior art, the invention has the advantages of energy conservation and high processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting, and in particular to a laser cutting device for a numerically controlled machine tool. Background Art

[0002] As an automated equipment equipped with a program control system, CNC machine tools can accurately drive machine tools to process various complex parts according to preset program instructions. CNC laser cutting machine is an application form of CNC machine tools, which has the advantages of fast cutting speed and narrow cutting seam. It uses high-energy laser beams to act on the surface of the material to quickly heat and melt or evaporate the metal, thereby achieving high-precision cutting. Compared with traditional mechanical cutting, CNC laser cutting machines have outstanding advantages such as non-contact, no deformation, high efficiency, and precision in the cutting process. They are widely used in aviation, automobile, electronics, mold and other industries.

[0003] However, existing CNC laser cutting machines often face challenges in energy control during the cutting process. Although laser cutting technology has significantly improved cutting speed and accuracy, it is still difficult to accurately control laser energy. Usually, in order to ensure that the cutting process is not disturbed by external factors and to avoid incomplete cutting due to insufficient energy, the laser energy is often set higher. Although this approach can ensure the cutting effect, it also brings problems of energy waste and low efficiency. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present application provides a CNC machine tool laser cutting device.

[0005] The present application provides a CNC machine tool laser cutting device, which adopts the following technical solution: A CNC machine tool laser cutting device, comprising: Frame; A support table, disposed on the frame, for supporting and fixing the product to be cut; a laser emitting device, movably disposed on the frame, for laser cutting the product on the support platform; and A cover body, arranged on the laser emitting device, and used to fit with the product so that the cover body and the product form an isolated cavity, and the laser emitted by the laser emitting device is located in the isolated cavity; Among them, the laser emitting device is provided with an air blowing port, which is located in the cover body and is used to blow air flow to the contact area between the product and the laser. The cover body is connected with an air outlet to discharge the air flow in the isolation cavity to the outside of the cover body, and the air pressure in the isolation cavity is greater than the external atmospheric pressure.

[0006] Preferably, the laser emitting device is used to cut a cutting seam on the product, and the laser emitting device is arranged on the downstream side of the cutting seam; And / or, the laser emitting device is provided with a conduit, the conduit is located in the isolation cavity, the air outlet is located at the end of the conduit facing the product, and the laser is irradiated onto the surface of the product through the conduit; And / or, the support platform is provided with a rib, the rib and the support platform form a trough body, and a coolant is provided in the trough body.

[0007] Preferably, a sleeve is provided on the catheter side facing the product, and the sleeve is slidably arranged on the catheter along the irradiation direction of the laser. A first elastic member is provided between the catheter and the sleeve to push the sleeve to abut against the surface of the product. A notch is provided on the sleeve end away from the catheter to allow the gas in the catheter to pass through.

[0008] Preferably, the notch faces the upstream side of the cutting seam; And / or, at least the portion of the sleeve that is in contact with the product is made of ceramic material.

[0009] Preferably, the cover body comprises a sealing body and a resilient member, wherein the resilient member is located between the sealing body and the product and is used to seal a gap between the sealing body and the product.

[0010] Preferably, the resilient member comprises an elastic unit and a fitting member, the elastic unit is made of an elastic material, one end of the elastic unit is connected to the sealing body, and the other end is connected to the fitting member; A second elastic member is provided between the elastic unit and the sealing body to push the fitting member to fit the product.

[0011] Preferably, the fitting is arranged in an annular shape, and from the outer ring to the inner ring of the fitting, the fitting has friction parts and sealing parts spaced apart, the sealing parts are made of elastic rubber material, and the friction parts are made of Teflon material; And / or, a plurality of the elastic units are disposed between the sealing body and the product, and adjacent elastic units are connected end to end and arranged in a circle along the length direction of the fitting; And / or, a guide rod is provided between the fitting and the sealing body, the guide rod and the sealing body are slidably matched in the irradiation direction of the laser, and the guide rod and the fitting are ball-jointed.

[0012] Preferably, the friction portion is provided with two circles, and the sealing portion is located between the two circles of the friction portion.

[0013] Preferably, a plurality of the friction parts are arranged at intervals along the length direction of the fitting.

[0014] Preferably, the swing angle of the ball joint between the guide rod and the fitting is less than 20 degrees.

[0015] The present invention has the following advantages and beneficial effects: The present invention effectively seals the laser cutting area by setting a cover body, and removes the smoke generated during the laser cutting process through the airflow system in the cover body. This can provide a more stable and optimized gas environment for the laser, reduce the energy loss of the laser during the conduction process, so that the laser energy can be adjusted more accurately, avoiding the problem of being unable to accurately control the energy due to uneven laser energy loss. By reducing energy loss, not only energy waste is reduced, but also the overall processing efficiency is improved.

[0016] In addition, precise control of laser energy helps reduce the expansion of the heat-affected zone. A large heat-affected zone may have a negative impact on the quality of the cut surface and cause thermal deformation of the material, which in turn affects the processing accuracy. By avoiding excessive laser energy and thus controlling the size of the heat-affected zone, the thermal deformation of the material can be effectively reduced and the processing accuracy can be improved.

[0017] It is worth noting that although too high laser energy can speed up the cutting speed, it may also cause excessive melting or uneven cutting, which will affect the cutting effect. Although too slow a cutting speed can effectively avoid these problems, it may increase the processing time and thus affect the cutting efficiency. The present invention balances the contradiction between cutting speed and cutting quality by accurately controlling the laser energy, thereby improving the cutting efficiency while ensuring the cutting accuracy.

[0018] During use, clean gas is blown out from the air port and contacts the smoke in the laser contact area before being discharged to the outside. Since the air pressure in the isolation chamber is high, this design helps to form an "airflow barrier" to further prevent the entry of external impurities, keep the cutting area clean, and help improve the stability and accuracy of cutting.

[0019] The area being cut is located inside the hood, which provides a larger gas flow to the area, which can effectively improve the heat dissipation effect and reduce heat accumulation. Heat accumulation may lead to insufficient precision during laser cutting. Therefore, reasonable airflow design can reduce the decrease in processing precision caused by heat accumulation to a certain extent and improve the overall cutting accuracy and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a front view of an embodiment of the present application; Figure 2 It is a structural schematic diagram of the support platform; Figure 3 It is a schematic diagram of the structure of the laser emitting device and the cover; Figure 4 yes Figure 3 A schematic diagram of the enlarged structure of the middle part A; Figure 5 It is a structural diagram of the product when it is matched with the cover body; Figure 6 It is a schematic diagram of the structure of the bonding part.

[0022] The markings in the figure are: 100, frame; 200, support platform; 210, rib; 220, trough; 300, laser emitting device; 310, air outlet; 320, catheter; 330, sleeve; 331, notch; 340, first elastic member; 400, cover; 410, isolation cavity; 420, air outlet; 430, sealing body; 440, rebound member; 441, elastic unit; 442, fitting member; 442a, friction part; 442b, sealing part; 443, second elastic member; 450, guide rod; 500, product; 510, cutting seam. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0024] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0025] As user demands increase, the precision requirements for laser cutting are also getting higher and higher. When laser cutting thinner metal products, local deformation often occurs, resulting in poor product quality. Especially in industries with high precision requirements, local deformation will produce a large number of defective products and increase production costs.

[0026] The applicant found that during the laser cutting process, the "smoke" generated and the dust in the processing workshop will have an adverse effect on the cutting quality. When the laser passes through the air containing smoke and dust, it will cause a large energy loss. In order to ensure that the laser can effectively cut through the metal, the laser energy must be increased. However, a larger laser energy will lead to an excessively large heat-affected zone, which will not only affect the quality of the cut surface, but may also cause thermal deformation of the material, thereby affecting the processing accuracy.

[0027] In order to solve the above problems, the present application provides a CNC machine tool laser cutting device. The device can effectively isolate the smoke and dust in the air during the cutting process by setting a cover, provide a cleaner laser propagation path, reduce the energy loss of the laser during the transmission process, thereby making the laser energy control more precise, improving the processing accuracy, reducing the heat affected zone during cutting, and effectively improving the cutting quality and production efficiency.

[0028] The following is a detailed description of a CNC machine tool laser cutting device provided in an embodiment of the present application through specific embodiments and their application scenarios.

[0029] Reference Figure 1 , Figure 2 The embodiment of the present application provides a CNC machine tool laser cutting device, which is intended to cut a thin metal product 500, and is exemplarily suitable for cutting a thin metal plate. The CNC machine tool laser cutting device includes a frame 100, a support table 200, a laser emitting device 300 and a cover 400. The frame 100 serves as an installation base, and the support table 200, the laser emitting device 300 and the cover 400 are all installed on the frame 100.

[0030] The support table 200 is used to support and fix the product 500 to be cut. When in use, the product 500 to be cut is installed and fixed on the support table 200, and laser cutting processing can be performed.

[0031] In some embodiments, the laser emitting device 300 is movably disposed on the frame 100 and is used to laser cut the product 500 on the support table 200. The laser emitting device 300 usually emits a laser for cutting metal, and the irradiation direction of the laser is usually perpendicular to the support table 200, or the angle between the laser and the support table 200 is an acute angle.

[0032] In order to realize the flexible movement of the laser emitting device 300, a first slide extending along the width direction of the support table 200 and a second slide extending along the length direction of the support table 200 may be provided on the frame 100. The first slide is fixed on the frame 100, and the second slide is slidably provided on the first slide along the width direction of the support table 200. The laser emitting device 300 is slidably provided on the second slide and can slide freely along the length direction of the support table 200, so that the laser emitting device 300 can be moved to various positions of the support table 200. This design is beneficial to the flexible adjustment during laser cutting, so that the laser can accurately cover the entire area to be cut.

[0033] In addition, the sliding structure of the laser emitting device 300 can be adjusted at different positions of the support table 200 according to the cutting requirements, ensuring that the problem of uneven or insufficient cutting caused by the fixed position is avoided to a certain extent. Through this structural design, the laser emitting device 300 can complete the cutting task of thin metal plates more efficiently, and the cutting accuracy is expected to be improved to a certain extent.

[0034] Reference Figure 2 , Figure 3 In some embodiments, the cover 400 is disposed on the laser emitting device 300 and is used to fit with the product 500, so that the cover 400 and the product 500 form an isolation cavity 410, and the laser emitted by the laser emitting device 300 is located in the isolation cavity 410. The design of the isolation cavity 410 effectively controls the environment of the laser cutting area to avoid interference from external air or impurities. The existence of the cover 400 enables the laser to cut in a more stable and controlled environment, and can effectively reduce the laser energy loss caused by external interference (such as dust, gas in the air, etc.).

[0035] Among them, the laser emitting device 300 is provided with an air blowing port 310, which is located in the cover body 400 and is used to blow air flow to the area where the product 500 contacts the laser. The cover body 400 is connected to an air outlet 420 so that the air flow in the isolation cavity 410 is discharged to the outside of the cover body 400, and the air pressure in the isolation cavity 410 is greater than the external atmospheric pressure. During use, clean gas is blown out from the air blowing port 310 and contacts the flue gas in the laser contact area, and then discharged through the air outlet 420, thereby taking away the flue gas generated during laser cutting and the dust in the air that may exist. The role of this airflow is not only to effectively take away the flue gas, but also to reduce the interference of flue gas and dust on the laser transmission path, thereby improving the transmission efficiency of the laser. Due to the removal of these impurities, the irradiation path of the laser is clearer, and it can irradiate the surface of the material to be cut more accurately, which improves the precision and quality of cutting to a certain extent.

[0036] In addition, the design of the cover 400 and the air outlet 310 can effectively reduce the energy loss of the laser during the transmission process. Since the flow of air can reduce interfering substances in the transmission path, the loss of laser energy is reduced to a certain extent, thereby effectively improving the cutting effect and overall efficiency. Due to this design, the laser can be transmitted in a cleaner and more stable environment, so that the error in the cutting process is reduced, and the cutting effect is more accurate and efficient.

[0037] The combined design of the cover 400 and the laser emitting device 300 ensures that the air pressure in the isolation cavity 410 is greater than the external atmospheric pressure. During use, the clean gas is blown out from the air port 310 and contacts the smoke in the laser contact area, and then the gas is discharged to the outside. Since the air pressure in the isolation cavity 410 is relatively high, this design helps to form a "airflow barrier", further isolating the entry of external impurities, keeping the cutting area clean, and helping to improve the stability and accuracy of cutting.

[0038] According to an alternative embodiment, referring to Figure 1 , Figure 5 , the laser emitting device 300 is used to cut the cutting seam 510 on the product 500, and the laser emitting device 300 is arranged at the downstream side of the cutting seam 510. For example, when the laser emitting device 300 is cutting from left to right, the laser emitting device 300 is located at the right end of the cutting seam 510, that is, at the left side of the cover body 400. Through this arrangement, it can be ensured that most of the cutting seam 510 is located outside the cover body 400, thereby avoiding a large amount of gas loss in the cover body 400 through the cutting seam 510, and avoiding the problem that the airflow cannot effectively carry away the smoke.

[0039] In addition, this design allows the area being cut to be located inside the cover 400, providing a larger gas flow rate for the area, which can effectively improve the heat dissipation effect and reduce heat accumulation. Heat accumulation may lead to insufficient precision during laser cutting. Therefore, a reasonable airflow design can reduce the decrease in processing precision caused by heat accumulation to a certain extent and improve the overall cutting precision and quality.

[0040] According to an alternative embodiment, referring to Figure 3 , Figure 4The laser emitting device 300 is provided with a conduit 320, the conduit 320 is located in the isolation cavity 410, the air port 310 is located at the end of the conduit 320 facing the product 500, and the laser is irradiated to the surface of the product 500 through the conduit 320. By providing the conduit 320, the laser can provide a dedicated transmission channel in the isolation cavity 410, so that the laser can be more accurately irradiated to the surface of the product 500 to be cut. In addition, the conduit 320 can effectively isolate the laser from the smoke generated during the cutting process, preventing the smoke from obstructing the laser transmission path, thereby ensuring the stability of the laser energy and reducing energy loss.

[0041] This structural design not only optimizes the efficiency of laser transmission, but also improves the management of airflow during the cutting process. By effectively isolating the smoke, the duct 320 ensures a clear path for the laser during transmission, while improving the accuracy and effect of laser cutting, which is beneficial to improving the overall processing quality.

[0042] It is understandable that clean gas is injected into the end of the conduit 320 away from the product 500, and gas flows out from the end of the conduit 320 toward the product 500, forming an airflow from the inside of the conduit 320 to the surface of the product 500. This design can effectively prevent the smoke generated during the cutting process from entering the conduit 320. Through this structure, the continuous flow of clean gas helps to keep the inside of the conduit 320 clean during the laser cutting process, thereby avoiding the influence of smoke on the laser transmission path, reducing energy loss, and ensuring the accuracy and cutting effect of the laser. This airflow management method not only improves the transmission efficiency of the laser, but also effectively protects the performance of the laser equipment and ensures the stability of high-precision cutting.

[0043] Reference Figure 1 , Figure 2 According to an optional embodiment, the support table 200 is provided with a rib 210, and the rib 210 and the support table 200 form a tank body 220, and a coolant is provided in the tank body 220. Such a design can ensure that during the processing of the product 500, the cutting area of ​​the product 500 can be immersed in the coolant, thereby effectively avoiding the stress concentration problem caused by heat accumulation during the laser cutting process. The use of coolant helps to reduce the temperature of the processing area, reduce material deformation or reduction in cutting quality caused by overheating, and further improve cutting accuracy and processing efficiency.

[0044] At the same time, the setting of the cover body 400 can separate the cutting area from the coolant tank body 220, forming a processing area without coolant. Since the positive pressure is designed in the cover body 400, the coolant can be effectively prevented from entering the cover body 400. This design not only helps to maintain the cleanliness of the cutting area during the laser cutting process, but also prevents the coolant from contacting the laser cutting area, preventing the coolant from interfering with the transmission path of the laser or causing instability in the cutting effect. In this way, not only can the cooling process be effectively accelerated, but the processing quality can also be further improved, ensuring that the product 500 maintains good structural stability and precision during the cutting process.

[0045] According to an alternative embodiment, referring to Figure 3 , Figure 4 , a sleeve 330 is provided on the side of the conduit 320 facing the product 500, and the sleeve 330 is slidably arranged on the conduit 320 along the irradiation direction of the laser, and a first elastic member 340 is arranged between the conduit 320 and the sleeve 330 to push the sleeve 330 to abut against the surface of the product 500, and a notch 331 is provided at the end of the sleeve 330 away from the conduit 320 to allow the gas in the conduit 320 to pass through. The function of this design is to ensure that the sleeve 330 can always fit closely to the surface of the product 500 through the cooperation of the sleeve 330 and the first elastic member 340, reduce the possibility of smoke entering the conduit 320, thereby effectively preventing the smoke from interfering with the laser transmission path during the cutting process, and ensuring the accuracy and effect of laser cutting. It can be understood that the first elastic member 340 can be a tension spring.

[0046] The design of the notch 331 helps improve the cooling and blowing effect of the processing area. Through the notch 331, the cooling gas can flow into the processing area and contact the laser cutting area, thereby taking away the smoke generated during the cutting process, and at the same time helping to cool the processing area to avoid material deformation or uneven cutting due to overheating. In this way, the cleanliness of the laser cutting can be maintained, and the cooling effect can be effectively improved, ensuring higher cutting accuracy and processing quality.

[0047] Exemplarily, the sliding fit between the sleeve 330 and the conduit 320 can be achieved by a structural design with elastic fit, so that the sleeve 330 can be adjusted according to the shape of the surface of the product 500 during operation and always maintain close contact with the surface. The first elastic member 340 between the sleeve 330 and the conduit 320 can provide sufficient thrust to ensure that the sleeve 330 will not be displaced during laser irradiation and can effectively resist the thermal expansion effect that may occur during cutting.

[0048] According to an alternative embodiment, referring to Figure 3 , Figure 4, the notch 331 faces the upstream side of the cutting slit 510. Such a design helps to prevent the cooling liquid from entering the cover body 400 from the already cut cutting slit 510 when the cover body 400 is immersed in the cooling liquid, thereby keeping the inside of the cover body 400 clean and preventing the cooling liquid from adversely affecting the laser transmission path.

[0049] According to an optional embodiment, at least the portion of the sleeve 330 that is in contact with the product 500 is made of ceramic material. Ceramic material has excellent lubrication properties and a low friction coefficient, which can effectively reduce friction when in contact with the surface of the product 500 and reduce the risk of wear on the product 500. This design can improve the smoothness during the cutting process, ensure the processing quality, and avoid surface damage caused by friction.

[0050] Through these structural designs, the cutting effect can be effectively improved. On the one hand, by directing the notch 331 toward the upstream side of the cutting seam 510, the airflow can be more effectively blown to the cutting area and take away the smoke and dust generated during the laser cutting process, reducing their interference with the laser path, thereby improving the laser transmission efficiency and cutting accuracy. On the other hand, the use of ceramic materials can reduce friction, protect the surface of the product 500, and reduce potential damage to the product 500, thereby ensuring cutting quality and accuracy.

[0051] In general, through reasonable structural design and material selection, the CNC machine tool laser cutting device of the present invention has achieved significant optimization effects in improving cutting accuracy, reducing thermal deformation, optimizing airflow paths, and protecting the surface of the product 500. These improvements not only improve the working efficiency of the equipment, but also improve the stability and quality during the processing.

[0052] According to an alternative embodiment, referring to Figure 3 , Figure 4 The cover body 400 includes a sealing body 430 and a resilient member 440. The resilient member 440 is located between the sealing body 430 and the product 500 and is used to seal the gap between the sealing body 430 and the product 500. This design helps to prevent the leakage of smoke and pollutants generated during the laser cutting process to a certain extent, ensure the clean environment inside the cover body 400, improve the transmission efficiency of the laser and reduce energy loss. At the same time, the resilient member 440 helps to form a closer contact between the sealing body 430 and the product 500 through its elastic effect, further enhancing the isolation effect between the cover body 400 and the product 500.

[0053] According to an optional embodiment, the resilient member 440 includes an elastic unit 441 and a fitting member 442, wherein the elastic unit 441 is made of an elastic material, one end of the elastic unit 441 is connected to the sealing body 430, and the other end is connected to the fitting member 442. The design of the elastic unit 441 enables the resilient member 440 to have a certain elasticity and flexibility, and can adapt to the slight unevenness or changes that may exist on the surface of the product 500, thereby maintaining the sealing effect. The fitting member 442 enhances the sealing by fitting with the surface of the product 500, ensuring that the airflow inside the cover body 400 will not leak out, while also preventing the adverse effects of external air on laser transmission.

[0054] A second elastic member 443 is provided between the elastic unit 441 and the sealing body 430 to push the fitting member 442 to fit with the product 500. The design of the second elastic member 443 ensures that the resilient member 440 can maintain a certain elasticity during long-term use, thereby effectively pushing the fitting member 442 to be in close contact with the surface of the product 500, further improving the sealing. Through this design, the risk of air leakage can be reduced to a certain extent, ensuring that the airflow in the cover body 400 can be effectively guided and discharged, while preventing coolant or other media from entering the cover body 400, thereby improving the stability and accuracy of the cutting process. It can be understood that the seal described here is a dynamic seal, that is, the fitting member 422 can still maintain a certain sealing effect during the relative movement with the product 500.

[0055] This structural design not only improves the sealing performance of the cover body 400, but also enhances the applicability of the device by adapting to different workpiece surfaces through the flexible resilient member 440. During the cutting process, it can effectively reduce the expansion of the heat-affected zone, improve the processing accuracy, reduce the risk of deformation of the product 500, and ultimately achieve a more efficient and accurate laser cutting effect.

[0056] According to an alternative embodiment, referring to Figure 4 , Figure 6 The fitting part 442 is arranged in a ring shape, and from the outer ring to the inner ring direction of the fitting part 442, the fitting part 442 is spaced apart with a friction part 442a and a sealing part 442b, the sealing part 442b is made of an elastic rubber material, and the friction part 442a is made of a Teflon material. Through this design, the friction part 442a can reduce the friction between the surface of the cover body 400 and the product 500, thereby avoiding excessive friction causing the device to wear or move unevenly when the cover body 400 slides. The low friction characteristics of the Teflon material can effectively reduce energy loss and maintain the flexible movement of the cover body 400. The sealing part 442b provides a good sealing effect through the elastic rubber material, forms a close contact between the cover body 400 and the product 500, prevents airflow leakage, further improves the sealing of the isolation cavity 410, and ensures the cleanliness of the laser transmission path.

[0057] According to an alternative embodiment, referring to Figure 3 , Figure 4 , a plurality of elastic units 441 are arranged between the sealing body 430 and the product 500, and adjacent elastic units 441 are connected end to end and arranged in a circle along the length direction of the fitting 442. The design of the plurality of elastic units 441 enables the sealing body 430 to adapt to the surfaces of products 500 of different shapes, providing better followability and sealing. Each elastic unit 441 can be deformed independently to a certain extent, so that even if there are local depressions or protrusions on the surface of the product 500, it will not affect the overall sealing effect between the cover body 400 and the product 500, thereby effectively avoiding air leakage or sealing failure caused by uneven contact. Through this structure, the adaptability of the seal can be enhanced, ensuring that the cover body 400 can maintain good sealing performance even under different processing conditions, thereby improving the efficiency and accuracy of laser cutting.

[0058] According to an alternative embodiment, referring to Figure 3 , Figure 4 A guide rod 450 is provided between the fitting 442 and the sealing body 430. The guide rod 450 and the sealing body 430 are slidably matched in the irradiation direction of the laser, and the guide rod 450 and the fitting 442 are ball-jointed. The design of the guide rod 450 provides guidance for the elastic unit 441 on the one hand, ensuring that the elastic unit 441 can be deformed in a predetermined direction, thereby maintaining a good seal between the cover body 400 and the product 500, and ensuring effective control of the airflow during the laser cutting process. On the other hand, the sliding fit between the guide rod 450 and the fitting 442 can effectively overcome the friction between the cover body 400 and the product 500, avoiding the cover body 400 from being difficult to move smoothly or the elastic unit 441 from bending due to excessive friction, thereby avoiding the failure of the seal.

[0059] The ball joint design between the guide rod 450 and the fitting member 442 has unique advantages. This design allows the fitting member 442 to rotate around the guide rod 450 to a certain extent when the cover body 400 moves horizontally relative to the product 500, so that the cover body 400 and the product 500 fit more closely, especially on the downstream side. As the cover body 400 moves downstream along the cutting path, the contact pressure between the fitting member 442 located on the downstream side of the moving direction of the cover body 400 and the surface of the product 500 increases, thereby enhancing the sealing effect and effectively scraping off the coolant or other impurities that may exist on the surface of the product 500, preventing these substances from entering the cover body 400, and maintaining the cleanliness of the laser cutting area.

[0060] At the same time, the ball joint design of the guide rod 450 and the fitting 442 allows the upstream side of the cover body 400 to maintain a relatively small pressure, which reduces the friction between the cover body 400 and the product 500, making the movement of the cover body 400 smoother, thereby improving the flexibility and stability of the cover body 400. This design not only optimizes the sealing effect, but also ensures that the cover body 400 can smoothly follow the shape changes of the surface of the product 500 during the entire laser cutting process, thereby improving the cutting accuracy and efficiency.

[0061] According to an alternative embodiment, referring to Figure 4 , Figure 6 , the friction part 442a is provided with two circles, and the sealing part 442b is located between the two circles of the friction part 442a. Through this design, the double-circle structure of the friction part 442a can provide a more stable and uniform friction force, thereby effectively reducing the relative movement friction between the cover body 400 and the surface of the product 500, and avoiding the cover body 400 from getting stuck or uneven pressure distribution during the movement. At the same time, the two-circle structure of the friction part 442a can better adapt to the slight deformation of the surface of the product 500, ensuring that the cover body 400 can maintain good sealing performance under different surface conditions.

[0062] According to an optional embodiment, a plurality of friction parts 442a are arranged at intervals along the length direction of the fitting 442. By means of a plurality of friction parts 442a arranged at intervals, more flexible followability can be achieved, especially when the surface shape of the product 500 is irregular or there are local protrusions, the interval design of the friction part 442a can effectively avoid local excessive contact or compression, thereby ensuring that the cover body 400 can always be stably fitted on the surface of the product 500. In contrast, if the friction part 442a is a ring-shaped end-to-end structure, when facing local protrusions or irregular shapes, some parts of the cover body 400 may not be able to follow closely on the surface of the product 500, resulting in poor sealing effect. Therefore, by setting a plurality of friction parts 442a at intervals, the followability of the cover body 400 can be significantly improved, ensuring a wider adaptability and a more uniform sealing effect. It can be understood that the friction part 442a is generally stronger, and the friction part 442a arranged at intervals facilitates the deformation of the fitting 442.

[0063] According to an optional embodiment, the swing angle of the ball joint between the guide rod 450 and the fitting 442 is less than 20 degrees. Controlling the swing angle between the guide rod 450 and the fitting 442 can effectively prevent the fitting 442 from rotating too much relative to the guide rod 450, resulting in failure of the sealing effect. By limiting the swing angle within a certain range, it can be ensured that the appropriate contact pressure is always maintained between the cover body 400 and the product 500, thereby maintaining the sealing and effectively preventing air or smoke from entering the cover body 400. In addition, appropriate angle restrictions can also reduce friction, ensure that the cover body 400 moves smoothly and flexibly, and further improve the cutting effect and accuracy.

[0064] During the movement of the cover body 400 relative to the product 500, due to the difference in pressure distribution at the contact point between the fitting 442 and the product 500, the fitting 442 near the downstream side of the cover body 400 relative to the product 500 will experience a greater contact pressure with the product 500, while the fitting 442 near the upstream side of the cover body 400 relative to the product 500 will experience a smaller contact pressure. This design ensures that the cover body 400 can always maintain good contact with the surface of the product 500 during the movement through reasonable pressure changes, avoiding sealing failure due to insufficient or excessive local pressure, thereby improving the airflow control effect and processing accuracy during the laser cutting process.

[0065] Specifically, when the cover body 400 moves relative to the product 500, the deformation of the contact surface and the change in local pressure cause the contact force between the fitting 442 and the surface of the product 500 to present different distributions. The contact pressure on the downstream side is relatively large, which can ensure the sealing of this area, avoid gas leakage, and effectively prevent smoke or dust from escaping from the cutting seam 510. The smaller contact pressure on the upstream side helps to reduce friction, avoid unnecessary wear or resistance caused by excessive pressure during the movement of the cover body 400, and thus improve the smoothness of movement.

[0066] Through this reasonable pressure design, the cover 400 can be stably attached to the surface of the product 500 during the entire cutting process, avoiding sealing failure caused by excessive or insufficient local pressure, improving airflow control during laser cutting, ensuring a cleaner laser transmission path, and reducing energy loss. In addition, this design can also help improve processing accuracy, ensuring that the laser can accurately irradiate the target area, and avoiding uneven cutting or excessive heat-affected zone caused by loose or uneven sealing.

[0067] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A CNC machine tool laser cutting device, characterized in that: include: Frame (100); A support platform (200), disposed on the frame (100), and used to support and fix the product (500) to be cut; a laser emitting device (300), movably disposed on the frame (100), and used for laser cutting the product (500) on the support platform (200); and a cover body (400) disposed on the laser emitting device (300) and used to fit with the product (500) so that the cover body (400) and the product (500) form an isolation cavity (410), and the laser emitted by the laser emitting device (300) is located in the isolation cavity (410); The laser emitting device (300) is provided with an air blowing port (310), and the air blowing port (310) is located in the cover body (400) and is used to blow air flow to the area where the product (500) and the laser are in contact. The cover body (400) is connected to an air outlet (420) so that the air flow in the isolation cavity (410) is discharged to the outside of the cover body (400), and the air pressure in the isolation cavity (410) is greater than the external atmospheric pressure.

2. A CNC machine tool laser cutting device according to claim 1, characterized in that: The laser emitting device (300) is used to cut a cutting seam (510) on the product (500), and the laser emitting device (300) is arranged on the downstream side of the cutting seam (510); And / or, the laser emitting device (300) is provided with a conduit (320), the conduit (320) is located in the isolation cavity (410), the air outlet (310) is located at the end of the conduit (320) facing the product (500), and the laser is irradiated onto the surface of the product (500) through the conduit (320); And / or, the support platform (200) is provided with a rib (210), the rib (210) and the support platform (200) enclose a trough body (220), and a cooling liquid is provided in the trough body (220).

3. A CNC machine tool laser cutting device according to claim 2, characterized in that: A sleeve (330) is provided on the side of the conduit (320) facing the product (500); the sleeve (330 is slidably arranged on the conduit (320) along the irradiation direction of the laser; a first elastic member (340) is provided between the conduit (320) and the sleeve (330) to push the sleeve (330) to abut against the surface of the product (500); and a notch (331) is provided on the end of the sleeve (330) facing away from the conduit (320) to allow gas in the conduit (320) to pass through.

4. A CNC machine tool laser cutting device according to claim 3, characterized in that: The notch (331) faces the upstream side of the cutting seam (510); And / or, at least the portion of the sleeve (330) that is in contact with the product (500) is made of ceramic material.

5. The CNC machine tool laser cutting device according to claim 1, characterized in that: The cover body (400) comprises a sealing body (430) and a resilient member (440); the resilient member (440) is located between the sealing body (430) and the product (500) and is used to seal the gap between the sealing body (430) and the product (500).

6. The CNC machine tool laser cutting device according to claim 5, characterized in that: The resilient member (440) comprises an elastic unit (441) and a fitting member (442); the elastic unit (441) is made of an elastic material; one end of the elastic unit (441) is connected to the sealing body (430), and the other end is connected to the fitting member (442); A second elastic member (443) is provided between the elastic unit (441) and the sealing body (430) to push the fitting member (442) to fit the product (500).

7. A CNC machine tool laser cutting device according to claim 6, characterized in that: The fitting member (442) is arranged in an annular shape, and from the outer ring to the inner ring direction of the fitting member (442), the fitting member (442) is provided with friction parts (442a) and sealing parts (442b) at intervals, the sealing parts (442b) are made of elastic rubber material, and the friction parts (442a) are made of Teflon material; And / or, a plurality of the elastic units (441) are disposed between the sealing body (430) and the product (500), and adjacent elastic units (441) are connected end to end and arranged along the length direction of the fitting member (442) to form a circle; And / or, a guide rod (450) is provided between the fitting (442) and the sealing body (430), the guide rod (450) and the sealing body (430) are slidably matched in the irradiation direction of the laser, and the guide rod (450) and the fitting (442) are ball-jointed.

8. The CNC machine tool laser cutting device according to claim 7, characterized in that: The friction portion (442a) is provided with two circles, and the sealing portion (442b) is located between the two circles of the friction portion (442a).

9. A CNC machine tool laser cutting device according to claim 7 or 8, characterized in that: A plurality of the friction parts (442a) are arranged at intervals along the length direction of the fitting (442).

10. The CNC machine tool laser cutting device according to claim 7, characterized in that: The swing angle of the ball joint between the guide rod (450) and the fitting member (442) is less than 20 degrees.

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