Intelligent CNC machine tool equipment for multi-axis milling machining in turning and milling processes.

Abstract

This invention discloses an intelligent CNC machine tool for multi-axis milling machining, relating to the field of metal processing technology. It includes a base support frame with a machine tool base on top. A first spindle and a second spindle are mounted on the top of the machine tool base, as are a first turret and a second turret. A workpiece holder is fixedly connected to one side of the first spindle, and the inner wall of the workpiece holder has a workpiece clamping groove. By incorporating a multi-axis milling surround ventilation mechanism, gas ejected from the annular surround air jet groove cools and blows away the workpiece at the center of the fixed air jet component, effectively preventing workpiece deformation and accelerated tool wear caused by high temperatures during cutting. Simultaneously, the gas ejected from the annular surround air jet groove forms an annular air curtain, effectively isolating the cutting area and concentrating the gas flow to a single preset area, preventing chip splashing from affecting machining accuracy and equipment safety.

Description

Technical Field

[0001] This invention relates to the field of metal processing technology, specifically to intelligent CNC machine tool equipment for multi-axis milling machining in milling-turning composite machining. Background Technology

[0002] A universal lathe center is a precision machining equipment used in the field of mechanical engineering, mainly for machining complex curved surfaces of shafts and discs. Its functions cover internal and external cylindrical surfaces, conical surfaces, thread machining, as well as drilling and reaming. It features high speed and high precision, making it suitable for both scientific research and industrial manufacturing.

[0003] The patent application with publication number CN204818714U describes an intelligent CNC machine tool for multi-axis milling machining in a turning-milling composite process. The machine tool includes a CNC device body, a CNC machine tool body, and a servo and measurement feedback system. The CNC device body is fixed to the CNC machine tool body; the servo and measurement feedback system is fixed to the CNC machine tool body; the CNC device body is connected to an input device; an information processing device is installed inside the CNC device body; an output device is installed in the CNC device body; the input device is connected to the information processing device; and the information processing device is connected to the output device.

[0004] In traditional multi-axis universal cutting machine tools, when performing high-precision multi-axis, multi-workpiece combined machining of a workpiece, the workpiece is typically clamped at one end of the spindle. After starting the machine tool, the spindle is controlled to rotate at high speed, and the tool turret drives the cutting tool to cut the workpiece. However, during the cutting process, the high-speed friction and cutting action between the tool and the workpiece generate a large amount of heat. High temperatures accelerate tool wear and shorten tool life. Moreover, the chips generated during the cutting process fly everywhere, which may not only scratch the workpiece surface and affect the machining quality, but may also enter the moving parts of the machine tool. Although existing universal machine tools have some simple cooling and chip removal methods, the cooling effect is not good, and they cannot effectively prevent workpiece deformation and accelerated tool wear, nor can they effectively solve the problem of chip splash affecting machining accuracy and equipment safety.

[0005] Therefore, how to effectively solve problems such as cooling, chip removal, and preventing chip splashing during the multi-axis linkage universal cutting combination machining of workpieces has become an urgent technical problem to be solved. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an intelligent CNC machine tool for multi-axis milling machining, thereby solving the aforementioned problems.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: an intelligent CNC machine tool for multi-axis milling machining of turning and milling composite processes, comprising a base support frame, a machine tool base provided on the top of the base support frame, a first spindle and a second spindle provided on the top of the machine tool base, a first turret and a second turret provided on the top of the machine tool base, a workpiece holder fixedly connected to one side of the first spindle, a workpiece clamping groove provided on the inner wall of the workpiece holder, and a multi-axis milling surrounding ventilation mechanism provided on one side of the first spindle;

[0008] The multi-axis milling surround ventilation mechanism includes:

[0009] A fixed jet component is provided, wherein a fixed connecting block is fixedly connected to one side of the fixed jet component, and an internally threaded fastener is fixedly connected to one side of the fixed block, and a bolt is threadedly connected to the inner wall of the internally threaded fastener.

[0010] An outer ring fixing sleeve is rotatably connected to the outer wall of the fixed jet component via a bearing. The inner wall of the fixed jet component has a circumferential jet groove. The bolt is threaded to one side of the first main shaft. An air intake pipe is provided on the top of the outer ring fixing sleeve.

[0011] Preferably, the bottom end of the air intake pipe is fixedly connected to the top of the outer ring fixing sleeve, the inner wall of the outer ring fixing sleeve is provided with a first annular connecting air groove, and the outer wall of the fixed jet component is provided with a second annular connecting air groove.

[0012] Preferably, the inner wall of the outer ring fixing sleeve is connected to the second annular connecting groove of the outer wall of the fixed jet component through the first annular connecting groove, and the inner wall of the outer ring fixing sleeve is connected to the inside of the air intake pipe.

[0013] Preferably, a cylindrical connecting shaft is fixedly connected to the inner wall of the second annular connecting air groove, and a circular fixing ring is fixedly connected to one end of the cylindrical connecting shaft. The circular fixing ring is an annular strip structure.

[0014] Preferably, the number of multi-axis milling surrounding ventilation mechanisms is six, and the six multi-axis milling surrounding ventilation mechanisms are distributed equidistantly in a ring on one side of the outer ring fixing sleeve. The number of cylindrical connecting shafts is eight, and the eight cylindrical connecting shafts are distributed equidistantly in a ring between the circular fixing ring and the second annular communicating air groove.

[0015] Preferably, a dynamic airflow adjustment mechanism is provided on one side of the fixed jet component. The dynamic airflow adjustment mechanism includes: a sliding arc-shaped baffle, a sliding telescopic rod fixedly connected to one side of the sliding arc-shaped baffle, an inclined fixing plate fixedly connected to one end of the sliding telescopic rod, and a fixing frame fixedly connected to one side of the inclined fixing plate.

[0016] Preferably, one end of the fixed connecting frame is fixedly connected to the outer wall of the fixed jet component, the inclined fixing plate is inclined and is used to rotate and move the air, one side of the sliding arc baffle has an inclined surface, and a flow guide plate is fixedly connected to the outer wall of the inclined surface.

[0017] Preferably, the number of flow-guiding dividing plates on the outer wall of the sliding arc-shaped baffle is seven, and the seven flow-guiding dividing plates are equidistantly distributed on the inclined surface of the outer wall of the sliding arc-shaped baffle. The inner wall of the sliding telescopic rod is provided with a built-in spring, which is used for pushing and resetting the sliding arc-shaped baffle.

[0018] Preferably, there are six sliding arc-shaped baffles, which are equidistantly distributed in a ring on one side of the surrounding jet groove. A metal counterweight is fixedly connected to the outer wall of each sliding arc-shaped baffle, and there are six metal counterweights, which are respectively fixedly connected to the outer wall of each of the six sliding arc-shaped baffles.

[0019] Preferably, the number of the inclined fixing plates and sliding telescopic rods is the same as the number of the sliding arc-shaped baffles, and all of them are distributed in a ring at equal intervals on one side of the surrounding jet groove.

[0020] This invention provides an intelligent CNC machine tool for multi-axis milling machining, which has the following advantages:

[0021] 1. This invention, by setting up a multi-axis milling surrounding ventilation mechanism, achieves cooling and purifying of the workpiece in the middle position of the fixed jet component by the gas ejected through the annular surrounding jet groove, effectively preventing workpiece deformation and accelerated tool wear caused by high temperature generated during the cutting process. At the same time, the gas ejected from the annular surrounding jet groove forms an annular air curtain, effectively isolating the cutting area and concentrating it to a single preset area, avoiding chip splashing that affects machining accuracy and equipment safety.

[0022] 2. By setting up a multi-axis milling surrounding ventilation mechanism, the gas ejected outward from the surrounding jet groove will form a dynamic annular air curtain as the fixed jet component rotates. Compared with a single annular spray air curtain, the axially rotating air curtain provides additional blocking effect on the residue splashing outward from the center through axial rotation, which can more effectively prevent chips and contaminants from splashing and protect the precision parts of the machine tool from damage.

[0023] 3. By setting up a multi-axis milling surrounding ventilation mechanism, the outer ring fixed sleeve and the fixed jet component are rotatably connected to each other through bearings. Therefore, the air injection pipe connected to the air intake pipe, as well as the air intake pipe and the outer ring fixed sleeve, will not rotate with the rotation of the fixed jet component, thereby ensuring the stability and continuity of gas delivery and avoiding pipe entanglement or air leakage caused by rotation. At the same time, it enables the cooling gas to always act accurately on the cutting area.

[0024] 4. This invention, by setting up a dynamic airflow adjustment mechanism, when the rotational speed increases and the centrifugal force exceeds a preset value, the spring inside the sliding telescopic rod begins to be compressed and deformed, causing the sliding arc-shaped baffle to slide outward along the guide path of the sliding telescopic rod. At this time, as the sliding distance changes, the sliding arc-shaped baffle gradually opens the air jet area of ​​the surrounding air jet groove, resulting in a gradual increase in the air jet volume. This achieves the function of automatically adjusting the gas jet range according to the rotational speed, further improving cooling efficiency and processing stability. At the same time, it ensures that the cooling and purging effect on the workpiece remains optimal under different rotational speeds. It solves the problem that at faster rotational speeds, the generated metal chips are finer and more easily adhere to the workpiece surface, affecting the workpiece's processing accuracy and generating higher heat. It can automatically optimize the distribution pattern of cooling gas according to different working conditions, making it more widely applicable and achieving a universal processing function.

[0025] 5. This invention, by setting up a dynamic airflow adjustment mechanism, allows the surrounding jet groove to be gradually exposed as the sliding arc-shaped baffle and the metal counterweight move outward due to centrifugal inertia. The gas ejected through the surrounding jet groove will come into contact with the inclined surface on one side of the sliding arc-shaped baffle. Since the inclined surface is inclined, the gas will be guided to the workpiece surface by the guiding effect of the inclined surface when passing through the inclined surface, thereby forming a more concentrated and efficient cooling and cleaning airflow covering the cutting area. This further enhances the ability to remove fine metal chips under high-speed rotation and ensures that the workpiece surface is always clean.

[0026] 6. By setting up a dynamic airflow adjustment mechanism, under normal speed conditions, the centrifugal force on the sliding arc baffle is small, and it is still in the initial position close to the inclined fixed plate. At this time, the air jet area of ​​the surrounding air jet groove is small and the gas flow is moderate, which can meet the normal cooling needs and avoid energy waste. At the same time, the inclined surface does not play a guiding role. At this time, the gas is evenly distributed in the cutting area, maintaining a stable cooling effect and avoiding the problem of excessive concentration of cooling effect or disturbance of workpiece surface caused by excessive spraying. During the switching between low speed and high speed, the device can automatically adapt to the speed change and dynamically adjust the gas jet mode, achieving efficient, energy-saving and stable cooling and cleaning effects.

[0027] 7. This invention, by setting up a dynamic airflow adjustment mechanism, allows the gas ejected through the inclined surface to be divided into multiple airflow streams by several guide and divider plates. Compared with the original overall annular spray airflow, the annular multi-stream airflow spray can increase the pressure of the airflow spray, remove a large amount of heat with higher flow rate and volume, and achieve overall blowing of long workpieces from one end to the other. While a single annular airflow can be evenly distributed in the annular area, it is difficult to achieve overall flow to high-heat areas and the surface of long workpieces. Therefore, when dealing with high-heat and long workpieces, the multiple guide and divider plates on the inclined surface can more effectively refine and divide the airflow, forming multiple high-intensity airflow jets that accurately cover the key heat dissipation areas of the workpiece, thereby significantly improving cooling efficiency and cleaning ability.

[0028] 8. By setting up a dynamic airflow adjustment mechanism, when the fixed connecting frame and the inclined fixing plate rotate, driving the sliding telescopic rod and the sliding arc-shaped baffle to rotate, the inclined fixing plate will create a pushing effect on the air due to its inclined setting. The rotational pushing effect of the inclined fixing plate will cause the surrounding air to flow, driving the large gas inside the device to circulate slowly, enhancing the overall heat dissipation efficiency, preventing hot air from accumulating in local areas and causing the temperature to rise, and at the same time, the externally supplemented cooling gas can penetrate into the device more effectively, thereby further improving the overall efficiency of the cooling system. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the first spindle of the present invention;

[0031] Figure 3 This is a schematic diagram of the workpiece clamp of the present invention;

[0032] Figure 4 This is a schematic diagram of the multi-axis milling surround ventilation mechanism of the present invention. Figure 1 ;

[0033] Figure 5 This is a schematic diagram of the multi-axis milling surround ventilation mechanism of the present invention. Figure 2 ;

[0034] Figure 6 This is a schematic diagram of the multi-axis milling surround ventilation mechanism of the present invention. Figure 3 ;

[0035] Figure 7 This is a schematic diagram of the disassembled structure of the multi-axis milling surrounding ventilation mechanism of the present invention;

[0036] Figure 8 This is a schematic diagram of the multi-axis milling surround ventilation mechanism of the present invention. Figure 4 ;

[0037] Figure 9 This is a schematic diagram of the airflow dynamic adjustment mechanism of the present invention;

[0038] Figure 10 For the present invention Figure 3 Enlarged view of point A.

[0039] In the diagram: 1. Base support frame; 2. Machine tool base; 3. Multi-axis milling surround ventilation mechanism; 301. Fixed jet component; 302. Fixed connecting block; 303. Internal threaded fastener; 304. Bolt; 305. Surround jet groove; 306. Air intake pipe; 307. Cylindrical connecting shaft; 308. Circular fixing ring; 309. First annular connecting air groove; 310. Second annular connecting air groove; 311. Outer ring fixing sleeve; 4. Airflow dynamic adjustment mechanism; 401. Sliding arc baffle; 402. Sliding telescopic rod; 403. Inclined fixing plate; 404. Fixed connecting frame; 405. Inclined surface; 406. Guide dividing plate; 407. Metal counterweight; 5. First spindle; 6. Second spindle; 7. First turret; 8. Second turret; 10. Workpiece holder; 11. Workpiece clamping groove. Detailed Implementation

[0040] Example 1: Please refer to Figure 1-4 The present invention provides a technical solution: an intelligent CNC machine tool for multi-axis milling machining of turning and milling composite machining, including a base support frame 1, a machine tool base 2 is provided on the top of the base support frame 1, a first spindle 5 and a second spindle 6 are provided on the top of the machine tool base 2, a first turret 7 and a second turret 8 are provided on the top of the machine tool base 2, a workpiece holder 10 is fixedly connected to one side of the first spindle 5, a workpiece holding groove 11 is provided on the inner wall of the workpiece holder 10, and a multi-axis milling surrounding ventilation mechanism 3 is provided on one side of the first spindle 5;

[0041] The multi-axis milling surround ventilation mechanism 3 includes:

[0042] A fixed jet component 301 is fixedly connected to one side of the fixed jet component 301, and a fixed connecting block 302 is fixedly connected to one side of the fixed connecting block 302. An internal threaded fastener 303 is fixedly connected to one side of the fixed connecting block 302, and a bolt 304 is threadedly connected to the inner wall of the internal threaded fastener 303.

[0043] The outer ring fixing sleeve 311 is rotatably connected to the outer wall of the fixed jet component 301 via a bearing. The inner wall of the fixed jet component 301 is provided with a circumferential jet groove 305. The bolt 304 is threadedly connected to one side of the first main shaft 5. An air inlet pipe 306 is provided on the top of the outer ring fixing sleeve 311.

[0044] When in use, the workpiece to be processed is clamped in 11 at one end of the first spindle 5. After starting the machine tool base 2, the first spindle 5 and the second spindle 6 are controlled to rotate at high speed. The first turret 7 is used to drive the tool to perform multi-axis linkage universal cutting on the workpiece, so as to realize high-precision multi-axis multi-workpiece composite machining.

[0045] When the first spindle 5 rotates at high speed, causing the workpiece holder 10 and the workpiece held in the workpiece clamping groove 11 to rotate synchronously, an external air injection pipe is connected through the air inlet pipe 306, allowing air to enter the outer ring fixing sleeve 311 through the air inlet pipe 306. The outer ring fixing sleeve 311 communicates with the interior of the fixed jet component 301, and the air enters the interior of the fixed jet component 301. Finally, the air is ejected outward through the surrounding jet groove 305 opened on one side of the fixed jet component 301. This achieves cooling and purifying of the workpiece in the middle position of the fixed jet component 301 by the gas ejected through the annular surrounding jet groove 305, effectively preventing the high temperature generated during the cutting process from causing workpiece deformation and accelerated tool wear. At the same time, the gas ejected from the annular surrounding jet groove 305 forms an annular air curtain, effectively isolating the cutting area and concentrating it to a single preset area to avoid chip splashing affecting machining accuracy and equipment safety.

[0046] Example 2: Please refer to Figure 1-9 Based on Embodiment 1, this invention provides a technical solution: In existing multi-axis linkage cutting machine tools, high-precision cutting of workpieces is a common requirement. During this type of machining, the high-speed friction and cutting action between the tool and the workpiece generate a large amount of heat. This heat not only causes a sharp increase in the local temperature of the workpiece, leading to deformation due to thermal expansion and affecting machining accuracy, but also accelerates tool wear, shortens tool life, and increases machining costs.

[0047] Meanwhile, chips and contaminants generated during the cutting process will fly everywhere. Although there are some devices to prevent chip flying, most of them use a single jet nozzle to spray, which is not very effective. If a ring-shaped spray air curtain is adopted, this static air curtain has limited effect on blocking the residue that flies outward from the center.

[0048] Furthermore, existing devices for cooling and chip removal are typically installed in a fixed manner, making them difficult to disassemble once installed. This makes operation extremely inconvenient when the device malfunctions and needs repair or cleaning after prolonged use, increasing the difficulty and time cost of maintenance and cleaning. Moreover, some devices are not designed to work in conjunction with rotating machine tool components. When the machine tool spindle rotates at high speed, if the device also rotates, it can cause the gas delivery pipes connecting the device to become entangled or leak, affecting the stability and continuity of gas delivery. Consequently, it cannot guarantee that the cooling gas can accurately act on the cutting area, reducing the cooling and chip removal effect. Therefore, effectively solving the problem of chip and contaminant splashing, facilitating device maintenance and cleaning, and ensuring the stability of gas delivery and the precise action of cooling gas during multi-axis linkage cutting of workpieces have become urgent technical challenges. Therefore, the bottom end of the air inlet pipe 306 is fixedly connected to the top of the outer ring fixing sleeve 311. The inner wall of the outer ring fixing sleeve 311 has a first annular connecting air groove 309, and the outer wall of the fixed air jet 301 has a second annular connecting air groove 310.

[0049] The inner wall of the outer ring fixing sleeve 311 is connected to the second annular connecting air groove 310 of the outer wall of the fixed jet component 301 through the first annular connecting air groove 309, and the inner wall of the outer ring fixing sleeve 311 is connected to the inside of the air intake pipe 306.

[0050] A cylindrical connecting shaft 307 is fixedly connected to the inner wall of the second annular connecting air groove 310. A circular fixing ring 308 is fixedly connected to one end of the cylindrical connecting shaft 307. The circular fixing ring 308 is an annular strip structure.

[0051] There are six multi-axis milling surrounding ventilation mechanisms 3, which are distributed equidistantly in a ring on one side of the outer ring fixing sleeve 311. There are eight cylindrical connecting shafts 307, which are distributed equidistantly in a ring between the circular fixing ring 308 and the second annular connecting air groove 310.

[0052] There are six sliding arc-shaped baffles 401, which are equidistantly distributed in a ring on one side of the surrounding jet groove 305. Metal counterweights 407 are fixedly connected to the outer wall of the sliding arc-shaped baffles 401. There are six metal counterweights 407, which are fixedly connected to the outer wall of the six sliding arc-shaped baffles 401 respectively.

[0053] The number of inclined fixed plates 403 and sliding telescopic rods 402 is the same as the number of sliding arc-shaped baffles 401, and they are all distributed in a ring at equal intervals on one side of the surrounding jet groove 305.

[0054] In addition, the fixed jet component 301 is fixed to one side of the first spindle 5 by the fixed connecting block 302, the internal threaded fastener 303, and the bolt 304. It can be installed by free disassembly and assembly, and can be freely disassembled for maintenance and cleaning. At the same time, when the first spindle 5 rotates at high speed, the fixed jet component 301 will also be driven to rotate at high speed synchronously by the internal threaded fastener 303, the bolt 304, and the fixed connecting block 302. At this time, the gas sprayed outward from the surrounding jet groove 305 will also form a dynamic annular air curtain with the rotation of the fixed jet component 301. Compared with the single annular spray air curtain, the axially rotating air curtain provides additional blocking effect for the residue splashed outward from the center through axial rotation, which can more effectively prevent chips and contaminants from splashing and protect the precision parts of the machine tool from damage.

[0055] The outer ring fixing sleeve 311 and the fixed jet component 301 are rotatably connected to each other through bearings. Therefore, the air injection pipe connected to the air intake pipe 306, as well as the air intake pipe 306 and the outer ring fixing sleeve 311, will not rotate with the rotation of the fixed jet component 301, thereby ensuring the stability and continuity of gas delivery, avoiding pipe entanglement or air leakage caused by rotation, and ensuring that the cooling gas can always act accurately on the cutting area.

[0056] Example 3: Please refer to Figure 1-10 Based on Embodiments 1 and 2, this invention provides a technical solution: When a machine tool spindle drives a workpiece to rotate at high speed for cutting, the spindle speed varies significantly under different working conditions. When the spindle is at a higher rotational speed, the workpiece machining accuracy requirements are usually higher, but the metal chips generated at this time are finer and easily adhere to the workpiece surface, seriously affecting the workpiece machining accuracy. At the same time, high-speed cutting also generates a large amount of heat. If cooling is not timely, it will lead to thermal deformation of the workpiece, further reducing the machining quality. However, most existing cooling devices use a fixed pattern of gas injection, which cannot automatically adjust the gas injection range and flow rate according to the spindle speed. It is difficult to maintain the best cooling and purging effect on the workpiece under different speed conditions, resulting in either insufficient cooling at high speeds or energy waste at low speeds.

[0057] On the other hand, the problem of chip and contaminant splashing during the cutting process has always been a challenge in machine tool machining. Traditional devices for preventing chip splashing generally use a single annular spray air curtain. This static air curtain has limited effectiveness in blocking debris splashing outwards from the center. Fine metal chips can still enter the precision parts of the machine tool, scratching the workpiece surface, damaging machine tool parts, and threatening machining quality and equipment safety. Moreover, existing cooling gas spraying methods are mostly overall annular sprays with relatively low airflow pressure. For high-heat areas and the surface of long workpieces, it is difficult to achieve effective overall blowing and precise heat dissipation, which cannot meet the machining requirements under complex working conditions.

[0058] Furthermore, the existing machine tool cooling devices are installed in a relatively fixed manner, making them difficult to disassemble once installed. This makes operation extremely inconvenient when the device malfunctions and needs repair or cleaning after prolonged use, increasing the difficulty and time cost of maintenance and cleaning, and affecting the normal use and production efficiency of the machine tool. Therefore, a dynamic airflow adjustment mechanism 4 is provided on one side of the fixed jet component 301. The dynamic airflow adjustment mechanism 4 includes: a sliding arc-shaped baffle 401, a sliding telescopic rod 402 fixedly connected to one side of the sliding arc-shaped baffle 401, an inclined fixing plate 403 fixedly connected to one end of the sliding telescopic rod 402, and a fixed connecting frame 404 fixedly connected to one side of the inclined fixing plate 403.

[0059] One end of the fixed connecting frame 404 is fixedly connected to the outer wall of the fixed jet component 301. The inclined fixing plate 403 is inclined and is used to rotate and move the air. An inclined surface 405 is formed on one side of the sliding arc baffle 401. A flow guide plate 406 is fixedly connected to the outer wall of the inclined surface 405.

[0060] The sliding arc-shaped baffle 401 has seven flow-guiding dividing plates 406 on its outer wall. The seven flow-guiding dividing plates 406 are equidistantly distributed on the inclined surface 405 of the outer wall of the sliding arc-shaped baffle 401. The inner wall of the sliding telescopic rod 402 is provided with a built-in spring, which is used for pushing and resetting the sliding arc-shaped baffle 401.

[0061] When the fixed jet component 301 is driven to rotate and spray gas, the fixed connecting frame 404, inclined fixed plate 403, sliding telescopic rod 402, and sliding arc-shaped baffle 401 on the fixed jet component 301 will be driven to rotate synchronously. The sliding arc-shaped baffle 401 will generate centrifugal force changes with the rotation speed and move closer to the inclined fixed plate 403 along the shortened path of the sliding telescopic rod 402. If the workpiece requires a faster rotation speed and the workpiece usually has higher precision requirements, the generated metal chips will be finer and more easily adhere to the workpiece surface, thus affecting the workpiece's machining accuracy and generating more heat. At this time, the sliding arc-shaped baffle 401, through the counterweight of the metal counterweight block 407, expands outward due to the increased centrifugal force caused by the increased rotation speed, pushing the built-in spring inside the sliding telescopic rod 402 to deform. When the force exceeds the preset value, the spring inside the sliding telescopic rod 402 begins to be compressed and deformed, causing the sliding arc-shaped baffle 401 to slide outward along the guide path of the sliding telescopic rod 402. At this time, as the sliding distance changes, the sliding arc-shaped baffle 401 gradually opens the air jet area of ​​the surrounding air jet groove 305, causing the air jet volume to gradually increase. This achieves the function of automatically adjusting the gas jet range according to the rotation speed, further improving cooling efficiency and processing stability. At the same time, it ensures that the cooling and purging effect on the workpiece is always kept in the optimal state under different rotation speed conditions. It solves the problem that at faster rotation speeds, the generated metal chips are finer and more easily adhere to the workpiece surface, affecting the workpiece's processing accuracy and generating higher heat. It can automatically optimize the distribution pattern of cooling gas according to different working conditions, making it more widely applicable and achieving the function of universal processing.

[0062] Meanwhile, as the sliding arc-shaped baffle 401 and the metal counterweight 407 move outward due to centrifugal inertia, the surrounding air jet groove 305 is gradually exposed. The gas ejected through the surrounding air jet groove 305 will come into contact with the inclined surface 405 on one side of the sliding arc-shaped baffle 401. Since the inclined surface 405 is inclined, when passing through the inclined surface 405, it will be guided to the workpiece surface by the guiding effect of the inclined surface 405, thereby forming a more concentrated and efficient cooling and cleaning airflow covering the cutting area, further enhancing the ability to remove fine metal chips under high-speed rotation, and ensuring that the workpiece surface is always clean.

[0063] Under normal speed conditions, the centrifugal force on the sliding arc baffle 401 is small, and it remains in the initial position close to the inclined fixed plate 403. At this time, the jet area of ​​the surrounding jet groove 305 is small, and the gas flow rate is moderate, which can meet the normal cooling requirements and avoid energy waste. Meanwhile, the inclined surface 405 does not play a guiding role. At this time, the gas is evenly distributed in the cutting area, maintaining a stable cooling effect and avoiding the problem of excessive concentration of cooling effect or disturbance of workpiece surface caused by excessive jetting. During the switching between low speed and high speed, the device can automatically adapt to the speed change and dynamically adjust the gas jet mode, achieving efficient, energy-saving, and stable cooling and cleaning effects.

[0064] Meanwhile, the gas ejected through the inclined surface 405 is divided into multiple airflows by several flow-guiding and dividing plates 406. Compared with the original overall annular spray airflow, the annular multi-stream airflow spray can increase the pressure of the airflow spray, carry away a large amount of heat with higher flow rate and volume, and achieve overall blowing of long workpieces from one end to the other. Although a single annular airflow can be evenly distributed in the annular area, it is difficult to achieve overall flow to high-heat areas and the surface of long workpieces. Therefore, when dealing with high-heat and long workpieces, the multiple flow-guiding and dividing plates 406 on the inclined surface 405 can more effectively refine and divide the airflow, forming multiple high-intensity airflow jets, which accurately cover the key heat dissipation areas of the workpiece, thereby greatly improving cooling efficiency and cleaning ability.

[0065] When the fixed connecting frame 404 and the inclined fixing plate 403 rotate, causing the sliding telescopic rod 402 and the sliding arc-shaped baffle 401 to rotate, the inclined fixing plate 403 will create an air-pulling effect due to its inclined setting. The rotational action of the inclined fixing plate 403 causes the surrounding air to flow, which in turn causes the large amount of gas inside the device to circulate slowly, enhancing the overall heat dissipation efficiency and preventing hot air from accumulating in local areas and causing the temperature to rise. At the same time, the externally supplied cooling gas can penetrate into the device more effectively, thereby further improving the overall efficiency of the cooling system.

[0066] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent CNC machine tool for multi-axis milling machining, comprising a base support frame (1), wherein a machine tool base (2) is provided on the top of the base support frame (1), characterized in that: The top of the machine tool base (2) is provided with a first spindle (5) and a second spindle (6), the top of the machine tool base (2) is provided with a first turret (7) and a second turret (8), a workpiece holder (10) is fixedly connected to one side of the first spindle (5), a workpiece holding groove (11) is provided on the inner wall of the workpiece holder (10), and a multi-axis milling surrounding ventilation mechanism (3) is provided on one side of the first spindle (5). The multi-axis milling surround ventilation mechanism (3) includes: A fixed jet component (301) is fixedly connected to a fixed connecting block (302) on one side of the fixed jet component (301), and an internally threaded fastener (303) is fixedly connected to one side of the fixed connecting block (302). A bolt (304) is threadedly connected to the inner wall of the internally threaded fastener (303). An outer ring fixing sleeve (311) is rotatably connected to the outer wall of the fixed jet component (301) via a bearing. The inner wall of the fixed jet component (301) is provided with a circumferential jet groove (305). The bolt (304) is threadedly connected to one side of the first main shaft (5). An air intake pipe (306) is provided on the top of the outer ring fixing sleeve (311). The bottom end of the air intake pipe (306) is fixedly connected to the top of the outer ring fixing sleeve (311). The inner wall of the outer ring fixing sleeve (311) is provided with a first annular connecting air groove (309), and the outer wall of the fixed jet component (301) is provided with a second annular connecting air groove (310). The inner wall of the outer ring fixing sleeve (311) is connected to the second annular connecting air groove (310) of the outer wall of the fixed jet component (301) through the first annular connecting air groove (309), and the inner wall of the outer ring fixing sleeve (311) is connected to the inside of the air intake pipe (306). A cylindrical connecting shaft (307) is fixedly connected to the inner wall of the second annular connecting air groove (310). A circular fixing ring (308) is fixedly connected to one end of the cylindrical connecting shaft (307). The circular fixing ring (308) is an annular strip structure. The number of cylindrical connecting shafts (307) is eight, and the eight cylindrical connecting shafts (307) are distributed equidistantly in a ring between the circular fixing ring (308) and the second annular connecting air groove (310); A dynamic airflow adjustment mechanism (4) is provided on one side of the fixed jet component (301). The dynamic airflow adjustment mechanism (4) includes: a sliding arc-shaped baffle (401), a sliding telescopic rod (402) is fixedly connected to one side of the sliding arc-shaped baffle (401), an inclined fixing plate (403) is fixedly connected to one end of the sliding telescopic rod (402), a fixed connecting frame (404) is fixedly connected to one side of the inclined fixing plate (403), and one end of the fixed connecting frame (404) is fixedly connected to the outer wall of the fixed jet component (301).

2. The intelligent CNC machine tool equipment for multi-axis milling machining according to claim 1, characterized in that: The inclined fixing plate (403) is inclined and is used to rotate and move the air. An inclined surface (405) is formed on one side of the sliding arc baffle (401), and a flow guide plate (406) is fixedly connected to the outer wall of the inclined surface (405).

3. The intelligent CNC machine tool equipment for multi-axis milling machining according to claim 2, characterized in that: The sliding arc-shaped baffle (401) has seven flow-guiding dividing plates (406) on its outer wall. The seven flow-guiding dividing plates (406) are equidistantly distributed on the inclined surface (405) of the outer wall of the sliding arc-shaped baffle (401). The inner wall of the sliding telescopic rod (402) is provided with a built-in spring, which is used for pushing and resetting the sliding arc-shaped baffle (401).

4. The intelligent CNC machine tool equipment for multi-axis milling machining according to claim 3, characterized in that: There are six sliding arc-shaped baffles (401), which are equidistantly distributed in a ring on one side of the surrounding jet groove (305). A metal counterweight (407) is fixedly connected to the outer wall of each sliding arc-shaped baffle (401). There are six metal counterweights (407), which are respectively fixedly connected to the outer wall of each of the six sliding arc-shaped baffles (401).

5. The intelligent CNC machine tool equipment for multi-axis milling machining according to claim 4, characterized in that: The number of inclined fixing plates (403) and sliding telescopic rods (402) is the same as the number of sliding arc-shaped baffles (401), and they are all distributed in a ring at equal intervals on one side of the surrounding jet groove (305).

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