Numerical control laser cutting machine tool

Abstract

The present application relates to cutting processing technical field, specifically is a kind of numerical control laser cutting machine, including pedestal, laser controlled by drive assembly is arranged on the upper side of pedestal, the support mechanism for being flexibly supported to material plate is arranged on the upper side of pedestal, the protection mechanism for the protection of support mechanism is arranged on drive assembly, the present application adopts nail plate to carry out main support to material plate, utilizes protection bowl to cooperate with lifting assembly drive to avoid corresponding nail plate to go down, so that protection bowl can effectively shield to nail plate in dynamic following mode, without manually adjusting workpiece position, prevent laser beam directly cutting nail plate, while reliable collection of cutting process splashed residue, prevent residue adhering on nail plate surface, so as to ensure that nail plate height is always uniform, in turn, to large quantities of cutting material plate is carried out long-term stable support without human intervention, realize the operation of no manual intervention, low maintenance frequency, high cutting quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting processing, in particular to a numerical control laser cutting machine tool. BACKGROUND

[0002] With the development of laser technology, laser cutting gradually becomes an important means of steel processing, which has the advantages of fast cutting speed and high precision. In the process of laser cutting, the flatness of the material plate is crucial. Uneven material plates are prone to cutting trajectory deviation, cutting quality decline, and even equipment damage during cutting.

[0003] The existing numerical control laser cutting machine tool usually uses a support nail plate to support the material plate, so that the material plate is arranged flat in the processing area. During cutting, the drive assembly controls the laser to move along the preset trajectory to cut the material plate. At the same time, protective gas is blown from top to bottom to assist the cutting process, disperse slag, and prevent oxidation of the cutting edge.

[0004] However, the support nail plate of the existing machine tool is fixed during cutting. In actual cutting process, high-energy laser beams can easily penetrate the material plate and cut the support nail plate below, causing the support nail plate to be damaged and the height to be reduced. At the same time, metal residues splashed during cutting are easily adhered to the surface of the support nail plate, forming a bump. These factors eventually make the support nail plate uneven, which affects the flatness of the material plate and ultimately affects the cutting accuracy.

[0005] Although the existing method can avoid laser beam cutting of the support nail plate by placing the cutting position between two adjacent support nail plates, this method is only suitable for small-scale cutting processing and requires manual adjustment of the workpiece position. Not only is the operation cumbersome, but it also significantly reduces the processing efficiency and is difficult to meet the production needs of large-scale and high-precision. SUMMARY

[0006] To solve the above technical problems, the technical solution adopted by the present application is: a numerical control laser cutting machine tool, comprising a base, a laser controlled to move by a drive assembly is arranged on the upper side of the base, a support mechanism for flexible support of the material plate is arranged on the upper side of the base, and a protection mechanism for protecting the support mechanism is arranged on the drive assembly.

[0007] The support mechanism comprises a plurality of nail plates arranged at equal intervals left and right, the nail plates are connected to the base in a sliding manner up and down and are used to mainly support the material plate, and a lifting assembly for driving the nail plates.

[0008] The protection mechanism comprises a moving seat connected to the lower part of the driving assembly through a synchronous assembly, the lifting assembly automatically moves downward to avoid the moving seat corresponding to the nail plate, a high-temperature-resistant material protection bowl is detachably arranged in the moving seat, the synchronous assembly drives the protection bowl to move with the laser through the moving seat, so that the protection bowl is always located at the coaxial position below the laser, and an auxiliary support assembly for supporting the material plate is arranged on the protection bowl.

[0009] When the laser moves for cutting, the protection bowl follows the laser beam to dynamically shield the nail plate, on the one hand, to collect the residues and prevent the residues from splashing and adhering to the nail plate, thereby increasing the height of the nail plate, and on the other hand, to cooperate with the automatic downward movement of the nail plate to prevent the cutting of the nail plate and reduce the height of the nail plate, thereby enabling the nail plate to stably support the material plate for a long time without manual intervention.

[0010] Preferably, the lifting assembly comprises an explosion-proof electric cylinder fixedly installed on the base and corresponding to the nail plate, and the telescopic section of the explosion-proof electric cylinder is fixedly connected with the nail plate at the corresponding position.

[0011] Preferably, the driving assembly comprises a track frame sliding left and right on the base, the track frame is slidingly connected with the laser in front and back, and the laser moves flexibly along the preset track on the X, Y and Z axes through the up-down telescopic movement of the laser, the front and back movement of the laser on the track frame and the left and right movement of the track frame.

[0012] Preferably, the synchronous assembly comprises a fixed frame fixedly installed on the track frame, and the moving seat is slidingly connected to the front and back of the fixed frame, and the upper side of the moving seat is lower than the upper side of the nail plate which is not moved downward.

[0013] Preferably, a lead screw is rotatably arranged on the fixed frame and threadedly connected with the moving seat, and an explosion-proof motor for driving the rotation of the lead screw is fixedly installed on the front side of the fixed frame.

[0014] Preferably, the auxiliary support assembly comprises a plurality of threaded studs threadedly connected to the moving seat and circumferentially uniformly distributed, and a plurality of rolling balls are rollingly arranged on the upper part of the threaded studs, and the upper part of the rolling balls protrudes from the upper surface of the moving seat, thereby rollingly supporting the lower side of the material plate.

[0015] Preferably, a shielding ring for shielding and protecting the rolling balls is detachably installed on the upper side of the moving seat, and the upper side of the shielding ring is lower than the upper side of the rolling balls.

[0016] Preferably, a plurality of air return pipes are fixedly installed on the moving seat at equal intervals in the circumferential direction, the air return pipes are arranged in a staggered manner with the rolling balls, a gas guide hole is formed in the lower part of the protection bowl and communicates with the inside and outside, the lower end gas inlet of the air return pipe receives a part of the gas discharged from the gas guide hole, and the upper end outlet of the air return pipe guides the gas to the inner side of the upper end of the shielding ring.

[0017] Preferably, the protective bowl bottom wall is in a center upwardly convex conical structure, and there is a gap between the air guide hole of the protective bowl and the lower end air inlet of the air return pipeline.

[0018] Preferably, the middle part of the inner side of the protective bowl is detachably mounted with an asbestos net, and the protective bowl is made of high-temperature-resistant ceramic material.

[0019] The beneficial effects of the present application are as follows: firstly, the present application uses a plurality of nail plates that can be controlled to move up and down to mainly support the material plate, uses a protective bowl that moves synchronously with the laser, and cooperates with the lifting assembly to drive the corresponding nail plate to move downward to avoid, so that the protective bowl can effectively shield the nail plate in a dynamic following manner, without the need for manual adjustment of the position of the workpiece, the laser beam is prevented from directly cutting the nail plate, and at the same time, the residues splashed during cutting can be reliably collected to prevent the residues from adhering to the surface of the nail plate, so that the height of the nail plate is always uniform, thereby long-term stable support of the material plate for mass cutting is realized without human intervention, the maintenance frequency is low, and the cutting quality is high.

[0020] Secondly, the present application uses a moving seat to drive the protective bowl to move synchronously with the laser below the material plate, when the laser beam penetrates the material plate, it will enter the protective bowl made of high-temperature-resistant ceramic material, thereby completely avoiding cutting damage to the nail plate behind or around by the laser beam, preventing the height from being reduced due to damage, and at the same time, the bowl-shaped structure of the protective bowl can effectively receive and collect the metal residues generated during cutting and splashed downward, thereby fundamentally preventing the residues from adhering to the surface of the nail plate to form a bump, and avoiding affecting the support precision due to uneven height of the nail plate.

[0021] Thirdly, the present application cooperates the air return pipeline with the air guide hole opened in the lower part of the protective bowl, so that part of the auxiliary gas blown into the protective bowl from top to bottom can be re-diverted to the inner side area of the upper end of the retaining ring through the air return pipeline outlet, the airflow circulation design forms a stable positive pressure environment in the edge area of the upper end of the protective bowl, effectively inhibits the phenomenon that the residues are blown upward and escape due to turbulence of the airflow inside the protective bowl, thereby significantly improving the collection effect and reliability of the protective bowl on the residues, further reducing the possibility that the residues adhere to the nail plate to cause the height to increase, and further improving the support stability of the nail plate after long-term use.

[0022] Fourthly, during cutting, the moving seat drives the ball to roll against the lower side of the material plate, so that the ball assists in supporting the cutting position of the material plate, and then the ball timely replaces the downward moving nail plate to assist in supporting the cutting position of the material plate, thereby ensuring that the material plate is always in a flat state. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in conjunction with the drawings and examples.

[0024] Figure 1It is the overall structure schematic diagram of the present application.

[0025] Figure 2 It is the left view of the present application.

[0026] Figure 3 It is the partial sectional view of the base, the nail plate and the explosion-proof electric cylinder in the present application.

[0027] Figure 4 It is the structure schematic diagram of the fixed frame, the lead screw, the protection mechanism and the nail plate in the present application.

[0028] Figure 5 It is the structure schematic diagram of the moving seat, the protection bowl, the asbestos net and the ball in the present application.

[0029] Figure 6 It is the partial sectional view of the moving seat, the protection bowl, the stud and the air return pipeline in the present application.

[0030] Figure 7 It is the partial sectional view of the moving seat, the protection bowl, the asbestos net and the air return pipeline in the present application.

[0031] Figure 8 It is the sectional view of the protection bowl in the present application.

[0032] In the figure: 1, base; 2, drive assembly; 3, laser; 4, support mechanism; 5, protection mechanism; 21, track frame; 41, nail plate; 42, lifting assembly; 51, synchronous assembly; 52, moving seat; 53, protection bowl; 54, auxiliary support assembly; 421, explosion-proof electric cylinder; 511, fixed frame; 512, lead screw; 513, explosion-proof motor; 521, guard ring; 522, air return pipeline; 531, asbestos net; 541, stud; 542, ball. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below. The embodiments described below are exemplary only, and are intended to explain the present application, and cannot be understood as a limitation of the present application. The specific technology or condition not noted in the embodiments is carried out according to the technology or condition described in the literature in the art or according to the product instruction.

[0034] Referring to Figure 1 , Figure 2 and Figure 4 , a numerical control laser cutting machine tool comprises a base 1, the upper side of the base 1 is provided with a laser 3 controlled to move by a drive assembly 2, the upper side of the base 1 is provided with a support mechanism 4 for flexibly supporting a material plate, and the drive assembly 2 is provided with a protection mechanism 5 for protecting the support mechanism 4.

[0035] Referring to Figure 1 and Figure 2The driving assembly 2 comprises a track frame 21 sliding left and right on the base 1, the track frame 21 is connected with the laser 3 in front and back sliding mode, and the track frame 21 is provided with a track driving structure commonly used on a machine tool in the prior art, so that the track frame 21 can not only slide left and right, but also drive the laser 3 to move forward and backward on the track frame 21. In addition, the laser 3 selects a component with a telescopic function in the prior art, so that the laser 3 can move flexibly along a preset track on the X, Y and Z axes through the telescopic function of the laser 3, the forward and backward movement of the laser 3 on the track frame 21 and the left and right movement of the track frame 21.

[0036] Referring to Figure 1 , Figure 2 and Figure 3 , the supporting mechanism 4 comprises a plurality of nail plates 41 arranged at equal intervals left and right, the nail plates 41 are connected in sliding mode on the base 1 and are used for mainly supporting the material plate, and a lifting assembly 42 is used for driving the nail plates 41.

[0037] Referring to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8 , the protection mechanism 5 comprises a moving seat 52 connected below the driving assembly 2 through a synchronous assembly 51, the synchronous assembly 51 comprises a fixed frame 511 fixedly installed on the track frame 21, the moving seat 52 is connected in front and back sliding mode on the fixed frame 511, a lead screw 512 is rotatably arranged on the fixed frame 511 and threadedly cooperates with the moving seat 52, an explosion-proof motor 513 is fixedly installed on the front side of the fixed frame 511 and is used for driving the lead screw 512 to rotate, the upper side of the moving seat 52 is lower than the upper side of the nail plate 41 which is not lowered, a protection bowl 53 made of high-temperature resistant material is detachably arranged in the moving seat 52, an asbestos net 531 is detachably installed in the middle of the inner side of the protection bowl 53, and the protection bowl 53 is made of ceramic material which is resistant to high temperature.

[0038] During cutting, the laser 3 moves above the material plate along a preset track, the fixed frame 511 is fixedly connected with the track frame 21, so that the moving seat 52 moves left and right synchronously with the laser 3, and the rotation of the explosion-proof motor 513 is controlled, so that the explosion-proof motor 513 drives the moving seat 52 to move forward and backward synchronously with the laser 3 through the lead screw 512, so that the moving seat 52 drives the protection bowl 53 in the moving seat 52 to always be located below the coaxial position of the laser 3, and then the protection bowl 53 can shield the laser beam emitted by the laser 3, so as to prevent the laser beam from cutting the nail plate 41 and causing the height of the nail plate 41 to be reduced.

[0039] The existing gas blowing structure blows the protective gas from top to bottom at the same time of cutting, so that the protective gas can prevent the cut from oxidation and blow off the hot residues generated by cutting, so that the residues fall through the cut of the plate into the protective bowl 53, the asbestos net 531 in the protective bowl 53 effectively adheres and retains the hot residues falling in, prevents the residues from rebounding or splashing, and further prevents the residues from splashing and adhering to the nail plate 41, so that the height of the nail plate 41 is increased, so as to ensure that the nail plate 41 can still maintain a high uniformity in a long-term use, so as to stably support the plate for a long time.

[0040] It is worth noting that the residues collected can be treated by regularly disassembling, cleaning or replacing the protective bowl 53, so as to ensure the collection effect of the protective bowl 53 on the residues, and further prevent the residues from adhering to the nail plate 41 to cause the height of the nail plate 41 to increase.

[0041] In order to enable the laser 3 to move in a wide range and avoid manual adjustment and arrangement of the position of the plate, the present application designs the following structure: referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the lifting assembly 42 includes an explosion-proof electric cylinder 421 fixedly installed on the base 1 and corresponding to the nail plate 41, and the telescopic section of the explosion-proof electric cylinder 421 is fixedly connected with the corresponding nail plate 41, the lifting assembly 42 avoids the moving seat 52 by moving downward to the corresponding nail plate 41, so that the protective bowl 53 is always located at the coaxial position below the laser 3.

[0042] By contracting the telescopic section of the explosion-proof electric cylinder 421 at the corresponding position, the corresponding nail plate 41 is completely moved downward to the lower part of the fixed frame 511, which can prevent the nail plate 41 from blocking the movement of the protective bowl 53, and when the laser 3 cuts above the nail plate 41, the nail plate 41 at the position is moved downward, so that the protective bowl 53 can be moved above the nail plate 41, thereby shielding and cutting the nail plate 41, collecting residues, preventing residues from adhering, and avoiding the height of the nail plate 41 from increasing.

[0043] In order to avoid the influence of the nail plate 41 after moving downward on the support of the plate, the present application designs the following structure: referring to Figure 4 、 Figure 5 and Figure 6 , the protective bowl 53 is provided with an auxiliary support assembly 54 for supporting the plate, the auxiliary support assembly 54 includes a plurality of threaded bolts 541 which are screw-connected to the moving seat 52 and are circumferentially distributed, and the upper part of the threaded bolt 541 is provided with a ball 542 which protrudes from the upper surface of the moving seat 52 and is flush with the upper side of the nail plate 41 which is not moved downward, so that the ball 542 rolls and supports the lower side of the plate.

[0044] The stud 541 is screwed into the moving seat 52, the upper end of the stud 541 is provided with a ball 542 which can freely roll, the ball 542 is arranged on the upper part of the moving seat 52, so that when cutting, the moving seat 52 drives the ball 542 to roll against the lower side of the material plate, so that the ball 542 assists the cutting position of the material plate, and the ball 542 replaces the nail plate 41 which moves downward in time, assists the cutting position of the material plate, and ensures that the material plate is always in a flat state.

[0045] Referring to Figure 5 and Figure 6 , the upper side of the moving seat 52 is detachably provided with a guard ring 521 for shielding the ball 542, the upper side of the guard ring 521 is lower than the upper side of the ball 542, the edge of the guard ring 521 corresponding to the position of the ball 542 shields the ball 542, prevents the splashed residues during cutting from adhering to the ball 542, and affects the rolling smoothness of the ball 542, and the upper side of the guard ring 521 does not contact the lower side of the material plate during cutting, preventing the guard ring 521 from contacting the material plate, on the one hand, avoiding that the guard ring 521 moves the material plate, and on the other hand, preventing the guard ring 521 from scratching the lower side of the material plate.

[0046] It is worth noting that the lower side of the guard ring 521 spans the moving seat 52 and the protection bowl 53, when the guard ring 521 is connected to the moving seat 52, the guard ring 521 can simultaneously block the position of the protection bowl 53, thereby ensuring that the protection bowl 53 can stably be in the interior of the moving seat 52.

[0047] In order to effectively utilize the protective gas blown from top to bottom during cutting, prevent the protection bowl 53 from generating strong turbulence, and prevent the residues from being carried out of the protection bowl 53 by the turbulence, the application designs the following structure: utilizing the protective gas, enhancing the collection effect of the protection bowl 53 on the residues: referring to Figure 5 、 Figure 6 、 Figure 7 and Figure 8 , the moving seat 52 is fixedly provided with a gas return pipeline 522 along the circumference at equal intervals, the gas return pipeline 522 is arranged in a staggered manner with the ball 542, the protection bowl 53 is provided with a gas guide hole which is in communication with the interior and the exterior, the lower end gas inlet of the gas return pipeline 522 receives part of the gas discharged from the gas guide hole, and then the gas is guided to the inner side of the upper end of the guard ring 521 through the upper end outlet of the gas return pipeline 522, the bottom wall of the protection bowl 53 is in a conical structure which is centrally upwardly raised, and there is a gap between the gas guide hole of the protection bowl 53 and the lower end gas inlet of the gas return pipeline 522.

[0048] When the protection gas blown from top to bottom carries the hot residue to move to the inside of the protection bowl 53, the airflow moves downward through the asbestos net 531, while the hot residue adheres to the asbestos net 531 to complete the collection, and then the downward impact airflow can be quickly guided around the conical structure of the bottom wall of the protection bowl 53, so that the airflow is smoothly guided into the air guide hole at the lower part of the protection bowl 53. Through the active guidance and regulation of the airflow inside the protection bowl 53, the generation of internal vortex and turbulence can be effectively avoided, the settling path of the residue is not disturbed, and the continuous and stable collection effect of the protection bowl 53 on the residue is ensured, further reducing the possibility of the height of the nail plate 41 increasing due to the residue adhering to the nail plate 41.

[0049] Then part of the airflow flowing out of the air guide hole flows into the lower end inlet of the air return pipe 522, and is re-guided to the inside area of the upper end of the protection ring 521 through the air return pipe 522 from the upper end outlet. The circulation design forms a stable positive pressure environment at the upper edge area of the protection bowl 53, effectively inhibits the phenomenon of residue escaping upward due to the turbulence of the airflow inside the protection bowl 53, and significantly improves the collection effect and reliability of the protection bowl 53 on the residue.

[0050] It should be emphasized that, since the protection gas basically moves downward coaxially with the laser beam, the protection gas impacts downward along the axial area of the protection bowl 53, and since there is a gap between the air guide hole of the protection bowl 53 and the lower end inlet of the air return pipe 522, as shown in Figure 7 , most of the downward impacting airflow flows to the outside, only a small part flows to the lower end inlet of the air return pipe 522, so as to ensure the overall flow state of the protection gas impacting downward along the axial area of the protection bowl 53, prevent the air outlet at the bottom of the protection bowl 53 from being unsmooth, and prevent the downward impacting airflow from turning upward along the edge position of the protection bowl 53.

[0051] The position of the air return pipe 522 and the shape of the protection bowl 53 in the embodiment are obtained through repeated tests by those skilled in the art, which can realize smooth guidance of the protection airflow and effective collection of the residue.

[0052] Although the protection bowl 53, the explosion-proof motor 513 and the ball 542 are provided in the present application to improve the cost, these investments have been repaid in excess through significantly improving the comprehensive performance of the equipment and the long-term operation economy. Specifically, through the above structure, the shielding and cutting of the protection bowl 53, the residue collection and the auxiliary support of the support plate by the auxiliary support assembly 54, the maintenance period is greatly prolonged, the frequent downtime caused by replacing the damaged nail plate 41 and cleaning the adhered residue is reduced; at the same time, through ensuring the persistent flatness and accurate avoidance of the support plane, the cutting precision and yield are effectively improved, and the waste loss is reduced; the automatic operation mode also reduces the dependence on the operator and the frequency of manual intervention.

[0053] In summary, the application has overall holding and use costs that do not increase but decrease, with consideration of equipment life, production efficiency and processing quality, and exhibits excellent practicability and market competitiveness with slight increase in initial cost.

[0054] In the description of the application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0055] In addition, the terms "first", "second", "one", "two" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0056] In the application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0057] The embodiments of the specific implementation are the preferred embodiments of the application, and do not limit the protection scope of the application, therefore, any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A CNC laser cutting machine tool, comprising a base, wherein a laser controlled by a drive assembly is disposed on the upper side of the base, characterized in that, The upper side of the base is provided with a support mechanism for flexibly supporting the material plate, and the drive assembly is provided with a protective mechanism to protect the support mechanism. The support mechanism includes several nail plates arranged at equal intervals on the left and right, the nail plates being slidably connected to the base and used to provide the main support for the material plate, and a lifting assembly for driving the nail plates. The protective mechanism includes a movable seat connected to the lower part of the drive assembly via a synchronization component. The lifting component automatically moves down to avoid the movable seat. A protective bowl made of high-temperature resistant material is detachably installed inside the movable seat. The synchronization component drives the protective bowl to move with the laser via the movable seat, so that the protective bowl is always located in the coaxial position below the laser. An auxiliary support component for supporting the material plate is installed on the protective bowl. When the laser moves to cut, a protective bowl follows the laser beam to dynamically block the nail plate, collect the residue and prevent it from splashing and adhering to the nail plate. At the same time, the nail plate moves down automatically to prevent cutting the nail plate, thus enabling the nail plate to provide long-term stable support to the material plate without manual intervention.

2. The CNC laser cutting machine tool according to claim 1, characterized in that, The lifting assembly includes explosion-proof electric cylinders fixedly installed on the base and corresponding one-to-one with the nail plates. The telescopic section of the explosion-proof electric cylinder is fixedly connected to the nail plate at the corresponding position.

3. The CNC laser cutting machine tool according to claim 1, characterized in that, The drive assembly includes a track frame that slides left and right on the base, and the track frame is slidably connected to the laser in the front and back.

4. A CNC laser cutting machine tool according to claim 3, characterized in that, The synchronization component includes a fixed frame that is fixedly installed on the track frame, and a movable seat that is slidably connected to the fixed frame. The upper side of the movable seat is lower than the upper side of the nail plate that has not been lowered.

5. A CNC laser cutting machine tool according to claim 4, characterized in that, The fixed frame is rotatably equipped with a lead screw that is threadedly engaged with the movable seat, and an explosion-proof motor for driving the lead screw to rotate is fixedly installed on the front side of the fixed frame.

6. A CNC laser cutting machine tool according to claim 1, characterized in that, The auxiliary support assembly includes several studs that are threaded to the movable seat and are evenly distributed circumferentially. The upper part of the studs is provided with rolling balls, and the upper part of the rolling balls protrudes from the upper surface of the movable seat, thereby providing rolling support for the lower side of the material plate.

7. A CNC laser cutting machine tool according to claim 6, characterized in that, A retaining ring for shielding and protecting the balls is detachably installed on the upper side of the movable seat, and the upper side of the retaining ring is lower than the upper side of the balls.

8. A CNC laser cutting machine tool according to claim 7, characterized in that, The movable seat is fixedly installed with return air pipes at equal intervals along its circumference. The return air pipes are staggered with the ball bearings. The lower part of the protective bowl has a guide hole that communicates with the inside and outside. The air inlet at the lower end of the return air pipe receives a portion of the gas discharged from the guide hole and then guides it to the inner side of the upper end of the retaining ring through the upper outlet of the return air pipe.

9. A CNC laser cutting machine tool according to claim 8, characterized in that, The bottom wall of the protective bowl has a conical structure with the center bulging upwards, and there is a gap between the air guide hole of the protective bowl and the air inlet at the lower end of the return air pipe.

10. A CNC laser cutting machine tool according to claim 1, characterized in that, An asbestos mesh is detachably installed in the middle of the inner side of the protective bowl, and the protective bowl is made of high-temperature resistant ceramic material.

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