Numerically controlled milling machine and method for milling medical device fittings

Abstract

The application discloses a numerical control milling machine tool and a milling processing method for medical instrument accessories, and relates to the field of intelligent manufacturing equipment.In the application, when the numerical control milling machine tool works, cooling gas and cooling liquid can be simultaneously transported into a gas-liquid mixing assembly through a cooling gas source and a cooling liquid source, the cooling gas and the cooling liquid are mixed in the gas-liquid mixing assembly to form atomized gas, and then the atomized gas is used to flush and cool the outside of a milling cutter through an external cooling assembly.Compared with only using cooling liquid to flush and cool, the use and consumption of the cooling liquid can be greatly reduced, so that the use cost of the milling machine tool is reduced, and the flowability of the atomized gas is stronger than that of the cooling liquid, so that when deep holes, deep grooves and other structures are milled, the atomized gas can flow to the deep part of the holes and grooves and fully contact and cool the milling cutter and the workpiece processing position.Another part of the atomized gas in the gas-liquid mixing assembly can flow through the inside of the milling cutter through an internal cooling assembly to internally cool and radiate heat for the milling cutter.

Description

Technical Field

[0001] This invention belongs to the field of intelligent manufacturing equipment, and specifically relates to a milling method for CNC milling machine tools and medical device accessories. Background Technology

[0002] CNC milling machines, also known as numerical control milling machines, are intelligent manufacturing equipment with automated control. The machined surfaces of CNC milling machines are generally composed of straight lines, arcs, or other curves. The control system continuously changes the relative position between the cutting tool and the workpiece according to the requirements of the input drawing, and then coordinates it with the selected milling cutter speed to enable the cutting tool to perform milling operations on the workpiece, thus producing workpieces of various shapes.

[0003] In existing CNC milling machine tools, a large flow of coolant is required to flush the milling cutter and workpiece during operation, serving to cool, lubricate, and clean the machine, thus aiding the milling process. Although CNC milling machine tools can recycle coolant during use, a significant amount of coolant is still wasted, significantly increasing the operating cost of the milling machine. Furthermore, when milling deep holes or grooves, the sprayed coolant is obstructed by the workpiece itself, making it difficult to achieve sufficient contact with the milling cutter and workpiece, thereby reducing the cooling, lubrication, and cleaning effectiveness of the coolant. Summary of the Invention

[0004] In view of the problems in related technologies, this invention proposes a milling method for CNC milling machine tools and medical device accessories, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a CNC milling machine tool, comprising a frame, on which a positioning mechanism and a milling mechanism are mounted, the positioning mechanism having a fixture for clamping and positioning a workpiece, and the milling mechanism having a drive assembly and a milling cutter, the drive assembly driving the milling cutter to perform milling on the workpiece clamped in the fixture.

[0007] The frame is also equipped with a cooling mechanism, which includes a gas-liquid mixing component, an internal cooling component, and an external cooling component. The inlet of the gas-liquid mixing component is connected to both a cooling gas source and a cooling liquid source, so that the gas-liquid mixing component can mix the cooling gas and cooling liquid to form atomized gas. The outlet of the gas-liquid mixing component is connected to both the internal cooling component and the external cooling component. The internal cooling component is located inside the milling cutter, and the external cooling component is located on one side outside the milling cutter, so that the internal cooling component can absorb heat and cool the inside of the milling cutter through atomized gas, and the external cooling component can rinse and cool the outside of the milling cutter through atomized gas.

[0008] Furthermore, the positioning mechanism includes a longitudinal drive screw, which is rotatably mounted on the worktable at the lower end of the frame. One end of the longitudinal drive screw is connected to a longitudinal drive motor. Both sides of the longitudinal drive screw are fixedly mounted with longitudinal slide rails. A longitudinal translation slide block is slidably mounted on the longitudinal slide rails. The longitudinal translation slide block is threadedly connected to the longitudinal drive screw.

[0009] Furthermore, the positioning mechanism also includes a transverse drive screw, which is rotatably mounted on a longitudinal translation slide. One end of the transverse drive screw is connected to a transverse drive motor. Transverse slide rails are fixedly mounted on both sides of the transverse drive screw. A transverse translation slide is slidably mounted on the transverse slide rail. The transverse translation slide is threadedly connected to the transverse drive screw. The fixture is fixedly mounted on the top surface of the transverse translation slide.

[0010] Furthermore, the drive assembly includes a lifting drive screw and a lifting slide rail. The lifting slide rail is vertically arranged and fixedly installed on the front side of the frame. A lifting slide block is slidably installed on the lifting slide rail. The lifting drive screw is rotatably installed on the frame. The end of the lifting drive screw is connected to a lifting drive motor, and the lifting drive screw is threadedly connected to the lifting slide block.

[0011] Furthermore, a main shaft is rotatably mounted on the lifting slide, a milling drive motor is fixedly mounted on one side of the main shaft, a transmission wheel is mounted on the output end of the milling drive motor, a driven wheel is fixedly mounted on the upper end of the main shaft, and the transmission wheel and the driven wheel are connected by a transmission belt.

[0012] Furthermore, the gas-liquid mixing assembly includes a gas-liquid mixing tube, one end of which is provided with an air inlet and a liquid inlet, the inside of which is provided with a gas-liquid mixing unit, and the other end of which is provided with an air outlet.

[0013] Furthermore, the gas-liquid mixing unit includes an outer ring and a support. The outer ring is fixedly installed on the inner wall of the gas-liquid mixing tube and is connected to the liquid inlet. An inner ring is rotatably installed on the inner ring of the outer ring, and the outer ring of the inner ring and the inner ring of the outer ring are connected to each other. Multiple atomizing nozzles are connected and installed on the inner ring of the inner ring.

[0014] The bracket is fixedly installed on the inner wall of the gas-liquid mixing pipe, and a rotating shaft located at the axis of the gas-liquid mixing pipe is rotatably installed on the bracket. A turbine is fixedly installed at one end of the rotating shaft, and a turntable is fixedly installed at the other end of the rotating shaft. Multiple connecting rods are fixedly installed on the turntable, and one end of each connecting rod is fixedly connected to the end of the inner ring sleeve.

[0015] Furthermore, the external cooling assembly includes a delivery conduit, one end of which is connected to an air outlet, and the other end of which extends to one side of the milling cutter and is connected to a spray head.

[0016] Furthermore, the internal cooling assembly includes a branch conduit, a guide channel, and a cooling channel. One end of the branch conduit is connected to and installed on the delivery conduit. Solenoid valves are installed on both the delivery conduit and the branch conduit. An outer connecting sleeve is fixedly connected to and installed on the other end of the branch conduit. An inner connecting sleeve is rotatably installed on the inner ring of the outer connecting sleeve, and the outer connecting sleeve and the inner connecting sleeve are interconnected. The inner connecting sleeve is fixedly installed on the outer ring of the spindle.

[0017] The guide channel is located inside the spindle, and the cooling channel is located inside the milling cutter. One end of the guide channel is connected to the inner connecting sleeve, and the other end of the guide channel is connected to the cooling channel. The bottom end of the cooling channel is connected to an air distribution groove located inside the milling cutter head. The outer ring of the air distribution groove is provided with multiple spray outlets that communicate with the inner concave part of the outer surface of the milling cutter head.

[0018] This invention also discloses a milling method for medical device accessories, the specific steps of which are as follows:

[0019] First, the parts required for processing medical device accessories are clamped on the fixture. Then, the milling cutter is driven by the drive assembly to mill the parts. At the same time, cooling gas and coolant are simultaneously supplied to the gas-liquid mixing assembly through the cooling gas source and coolant source. The cooling gas and coolant are mixed in the gas-liquid mixing assembly to form atomized gas. Then, part of the atomized gas flows through the interior of the milling cutter through the internal cooling assembly to absorb heat and cool the interior of the milling cutter. The other part of the atomized gas is flushed and cooled on the exterior of the milling cutter through the external cooling assembly.

[0020] The present invention has the following beneficial effects:

[0021] 1. In this invention, when a CNC milling machine is working, cooling gas and coolant can be simultaneously supplied to the gas-liquid mixing component through a cooling gas source and a coolant source. The cooling gas and coolant mix in the gas-liquid mixing component to form atomized gas. Then, the atomized gas is used to rinse and cool the outside of the milling cutter through an external cooling component. Compared with using only coolant for rinsing and cooling, this can significantly reduce the use and consumption of coolant, thereby reducing the operating cost of the milling machine. Moreover, the atomized gas has stronger fluidity than coolant, so when milling deep holes, deep grooves and other structures, the atomized gas can flow to the depth of the hole or groove and make full contact with the milling cutter and the workpiece machining position to improve the cooling, lubrication and cleaning effect on the milling cutter and the workpiece machining position.

[0022] 2. In this invention, a portion of the atomized gas within the gas-liquid mixing component can also flow through the interior of the milling cutter via the internal cooling component, and then be ejected outward from the groove of the milling cutter's head. When the atomized gas flows through the interior of the milling cutter, it can absorb the heat inside the milling cutter and cool the milling cutter, thereby improving the cooling effect of the milling cutter. When the atomized gas is ejected outward from the groove of the milling cutter's head, it allows the atomized gas to make more full contact with the milling position of the workpiece, thereby improving the cooling, lubrication, and cleaning effect on the workpiece.

[0023] 3. In this invention, the annular liquid distribution sleeve and multiple atomizing nozzles work together to evenly distribute the coolant within the gas-liquid mixing pipe, thereby improving the gas-liquid mixing effect. When the atomized gas after gas-liquid mixing flows through the turbine position within the gas-liquid mixing pipe, the turbine can rotate under the action of fluid pressure to rotate and stir the mixed atomized gas, further improving the gas-liquid mixing effect. Moreover, the rotation of the turbine can drive the liquid distribution sleeve and atomizing nozzles to rotate, further improving the uniformity of the initial distribution of coolant within the gas-liquid mixing pipe, thus contributing to a better gas-liquid mixing effect. The more uniform the gas-liquid mixing, the better the cooling, lubrication, and cleaning effects of the mixed atomized gas.

[0024] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, the drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is one of the three-dimensional structural schematic diagrams of the CNC milling machine tool of the present invention;

[0027] Figure 2 For the present invention Figure 1A magnified schematic diagram of the structure at point A;

[0028] Figure 3 This is the second three-dimensional structural schematic diagram of the CNC milling machine tool of the present invention;

[0029] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at point B;

[0030] Figure 5 This is a front structural diagram of the CNC milling machine tool of the present invention;

[0031] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point C;

[0032] Figure 7 This is the fourth three-dimensional structural schematic diagram of the CNC milling machine tool of the present invention;

[0033] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point D.

[0034] 1. Frame; 2. Positioning mechanism; 21. Longitudinal translation slide; 22. Lateral drive screw; 23. Lateral drive motor; 24. Lateral slide rail; 25. Lateral translation slide; 26. Fixture; 27. Longitudinal drive motor; 28. Longitudinal slide rail; 29. ​​Longitudinal drive screw; 3. Milling mechanism; 31. Lifting drive motor; 32. Lifting drive screw; 33. Lifting slide rail; 34. Lifting slide; 35. Spindle; 36. Milling cutter; 37. Milling drive motor; 38. Transmission wheel; 39. Transmission belt; 310. Driven wheel ; 4. Cooling mechanism; 41. Gas-liquid mixing pipe; 42. Air inlet; 43. Liquid inlet; 44. Air outlet; 45. Delivery conduit; 46. Branch conduit; 47. Solenoid valve; 48. Spray head; 49. Spray outlet; 410. Outer connecting sleeve; 411. Inner connecting sleeve; 412. Guide channel; 413. Cooling channel; 414. Air distribution groove; 415. Outer ring sleeve; 416. Inner ring sleeve; 417. Atomizing nozzle; 418. Rotating shaft; 419. Turbine; 420. Connecting rod; 421. Support; 422. Turntable. Detailed Implementation

[0035] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0036] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the invention.

[0037] Example 1

[0038] Please see Figure 1 , Figure 2 As shown, the present invention is a CNC milling machine tool, including a frame 1, a positioning mechanism 2 and a milling mechanism 3 located above the positioning mechanism 2, the positioning mechanism 2 is provided with a fixture 26 for clamping and positioning the workpiece, the milling mechanism 3 includes a drive assembly and a milling cutter 36, the drive assembly can drive the milling cutter 36 to perform milling on the workpiece clamped in the fixture 26; the frame 1 is also equipped with a cooling mechanism 4, the cooling mechanism 4 includes a gas-liquid mixing assembly, an internal cooling assembly and an external cooling assembly, the inlet end of the gas-liquid mixing assembly is connected to both a cooling gas source and a cooling liquid source, so that the gas-liquid mixing assembly can mix the cooling gas and the cooling liquid to form atomized gas, the outlet end of the gas-liquid mixing assembly is connected to both the internal cooling assembly and the external cooling assembly, and the internal cooling assembly is opened inside the milling cutter 36, the external cooling assembly is located on one side outside the milling cutter 36, so that the internal cooling assembly can absorb heat and cool the inside of the milling cutter 36 through atomized gas, and the external cooling assembly can rinse and cool the outside of the milling cutter 36 through atomized gas.

[0039] When using this CNC milling machine tool, the workpiece to be processed is first clamped on the fixture 26, and then the milling cutter 36 is driven by the drive assembly to perform milling on the workpiece. At the same time, cooling gas and coolant are simultaneously supplied to the gas-liquid mixing assembly through the cooling gas source and the coolant source, so that the cooling gas and coolant are mixed in the gas-liquid mixing assembly to form atomized gas. Then, part of the atomized gas flows through the interior of the milling cutter 36 through the internal cooling assembly to absorb heat and cool the interior of the milling cutter 36, and is sprayed out from the groove of the cutter head of the milling cutter 36. The other part of the atomized gas is flushed and cooled on the exterior of the milling cutter 36 through the external cooling assembly.

[0040] The process involves using atomized gas, a mixture of gas and liquid, to rinse and cool the exterior of the milling cutter 36. Compared to using only coolant, this significantly reduces coolant usage and consumption, thus lowering the operating cost of the milling machine. Furthermore, the atomized gas has greater fluidity than coolant, allowing it to reach deep into the holes and grooves during milling of deep holes and grooves, ensuring sufficient contact with the milling cutter 36 and the workpiece machining area. This enhances the cooling, lubrication, and cleaning effects on both. The atomized gas also flows through the interior of the milling cutter 36, absorbing internal heat. This, combined with external cooling, further improves the cooling effect. Finally, when the atomized gas is ejected from the groove at the cutter head of the milling cutter 36, it makes more thorough contact with the workpiece milling area, further enhancing the cooling, lubrication, and cleaning effects.

[0041] Example 2

[0042] Please see Figures 1-3 As shown, the difference between this embodiment and the above embodiment is that the positioning mechanism 2 includes a longitudinal drive screw 29, which is rotatably mounted on the worktable at the lower end of the frame 1. One end of the longitudinal drive screw 29 is connected to a longitudinal drive motor 27. Both sides of the longitudinal drive screw 29 are fixedly mounted with longitudinal slide rails 28. A longitudinal translation slide block 21 is slidably mounted on the longitudinal slide rails 28. The longitudinal translation slide block 21 is threadedly connected to the longitudinal drive screw 29. The positioning mechanism 2 also includes a transverse drive screw 22, which is rotatably mounted on the longitudinal translation slide block 21. One end of the transverse drive screw 22 is connected to a transverse drive motor 23. Both sides of the transverse drive screw 22 are fixedly mounted with transverse slide rails 24. A transverse translation slide block 25 is slidably mounted on the transverse slide rails 24. The transverse translation slide block 25 is threadedly connected to the transverse drive screw 22. A fixture 26 is fixedly mounted on the top surface of the transverse translation slide block 25.

[0043] When milling a workpiece, the workpiece is first clamped and fixed on the fixture 26. Then, according to the workpiece's processing requirements, the longitudinal drive motor 27 can drive the longitudinal drive screw 29 to rotate, so that the longitudinal drive screw 29 drives the longitudinal translation slide 21 to move parallel along the longitudinal slide rail 28 through thread transmission, thereby adjusting the longitudinal movement of the fixture 26 and the workpiece. The transverse drive motor 23 can also drive the transverse drive screw 22 to rotate, so that the transverse drive screw 22 drives the transverse translation slide 25 to move parallel along the transverse slide rail 24 through thread transmission, thereby adjusting the transverse movement of the fixture 26 and the workpiece. Thus, by adjusting the longitudinal and transverse movement of the workpiece, the relative position of the workpiece and the milling cutter 36 can be adjusted, so that the milling cutter 36 can perform milling processing on the workpiece.

[0044] Example 3

[0045] Please see Figures 1-4 As shown, the difference between this embodiment and the above embodiments is that the drive assembly includes a lifting drive screw 32 and a lifting slide rail 33. The lifting slide rail 33 is vertically arranged and fixedly installed on the front side of the frame 1. A lifting slide block 34 is slidably installed on the lifting slide rail 33. The lifting drive screw 32 is rotatably installed on the frame 1. The end of the lifting drive screw 32 is connected to a lifting drive motor 31, and the lifting drive screw 32 and the lifting slide block 34 are threadedly connected. A main shaft 35 is rotatably installed on the lifting slide block 34. A milling drive motor 37 is fixedly installed on one side of the main shaft 35. A transmission wheel 38 is installed at the output end of the milling drive motor 37. A driven wheel 310 is fixedly installed at the upper end of the main shaft 35. The transmission wheel 38 and the driven wheel 310 are connected by a transmission belt 39. The bottom end of the main shaft 35 is fixedly connected to the milling cutter 36.

[0046] When milling a workpiece, the lifting drive motor 31 drives the lifting drive screw 32 to rotate, so that the lifting drive screw 32 drives the lifting slide 34 to move up and down along the lifting slide rail 33 through thread transmission. This causes the lifting slide 34 to drive the milling cutter 36 to move up and down, adjusting the relative position of the milling cutter 36 and the workpiece in the height direction. At the same time, the milling drive motor 37 drives the transmission wheel 38 to rotate, and the transmission wheel 38 drives the driven wheel 310 to rotate through the transmission belt 39, thereby driving the spindle 35 and the milling cutter 36 to rotate, so that the milling cutter 36 can perform milling on the workpiece.

[0047] Example 4

[0048] Please see Figures 1-6 As shown, the difference between this embodiment and the above embodiment is that the gas-liquid mixing assembly includes a gas-liquid mixing pipe 41, one end of which is provided with an air inlet 42 and a liquid inlet 43, a gas-liquid mixing unit is provided inside the gas-liquid mixing pipe 41, and the other end of the gas-liquid mixing pipe 41 is provided with an air outlet 44; the external cooling assembly includes a delivery conduit 45, one end of which is connected to the air outlet 44, and the other end of which extends to one side of the milling cutter 36 and is connected to and installed with a spray head 48;

[0049] The internal cooling assembly includes a branch conduit 46, a guide channel 412, and a cooling channel 413. One end of the branch conduit 46 is connected to and installed on the delivery conduit 45. Solenoid valves 47 are installed on both the delivery conduit 45 and the branch conduit 46. An outer connecting sleeve 410 is fixedly connected to and installed on the other end of the branch conduit 46. An inner connecting sleeve 411 is rotatably installed on the inner ring of the outer connecting sleeve 410, and the outer connecting sleeve 410 and the inner connecting sleeve 411 are interconnected. The inner connecting sleeve 411 is fixedly installed on the outer ring of the spindle 35. The guide channel 412 is opened inside the spindle 35, and the cooling channel 413 is opened inside the end mill 36. One end of the guide channel 412 is connected to the inner connecting sleeve 411, and the other end of the guide channel 412 is connected to the cooling channel 413. The bottom end of the cooling channel 413 is connected to an air distribution groove 414 provided inside the end mill 36. The outer ring of the air distribution groove 414 is provided with multiple spray outlets 49 that communicate with the inner concave part of the outer surface of the end mill 36.

[0050] The air inlet 42 is connected to the cooling fan, and the liquid inlet 43 is connected to the coolant tank via a hydraulic pump. During milling, the cooling fan delivers cooling gas into the gas-liquid mixing pipe 41 through the air inlet 42, and the hydraulic pump pumps the coolant from the coolant tank into the gas-liquid mixing pipe 41 through the liquid inlet 43. The cooling gas and coolant then mix in the gas-liquid mixing pipe 41 to form atomized gas. The atomized gas is then delivered to the delivery conduit 45 through the air outlet 44. A portion of the atomized gas in the delivery conduit 45 is then sprayed from the spray head 48 onto the milling cutter 36 to rinse the milling cutter 36 and the workpiece milling area, achieving cooling, lubrication, and cleaning effects. The remaining portion of the atomized gas in the delivery conduit 45... The branch conduit 46 delivers gas to the outer connecting sleeve 410, and then the outer connecting sleeve 410, inner connecting sleeve 411, and guide channel 412 deliver gas to the cooling channel 413. At this time, the atomized gas can absorb the heat inside the milling cutter 36 and cool it down. Afterward, the atomized gas is sprayed outward from multiple spray outlets 49 on the outer ring of the air distribution groove 414 to rinse the workpiece machining position of the milling cutter 36, thereby improving the cooling, lubrication, and cleaning effect on the workpiece. By adjusting the opening and closing degree of the solenoid valve 47 on the delivery conduit 45 and the branch conduit 46, the flow rate of the branch conduit 46 and the spray head 48 can be adjusted, thereby adjusting the cooling and heat dissipation effect of the inner and outer cooling components according to the heat dissipation requirements.

[0051] Example 5

[0052] Please see Figure 7 , Figure 8As shown, the difference between this embodiment and the above embodiment is that the gas-liquid mixing unit includes an outer ring 415 and a bracket 421. The outer ring 415 is fixedly installed on the inner wall of the gas-liquid mixing pipe 41 and is connected to the liquid inlet 43. An inner ring 416 is rotatably installed on the inner ring of the outer ring 415, and the outer ring of the inner ring 416 is connected to the inner ring of the outer ring 415. Multiple atomizing nozzles 417 are connected to the inner ring of the inner ring 416. The bracket 421 is fixedly installed on the inner wall of the gas-liquid mixing pipe 41, and a rotating shaft 418 located at the axis of the gas-liquid mixing pipe 41 is rotatably installed on the bracket 421. A turbine 419 is fixedly installed at one end of the rotating shaft 418, and a turntable 422 is fixedly installed at the other end of the rotating shaft 418. Multiple connecting rods 420 are fixedly installed on the turntable 422, and one end of each connecting rod 420 is fixedly connected to the end of the inner ring 416.

[0053] The coolant is delivered to the outer ring 415 through the inlet 43, and then from the outer ring 415 to the inner ring 416. Multiple atomizing nozzles 417 on the inner ring 416 then atomize and spray the coolant into the gas-liquid mixing pipe 41. Meanwhile, the high-pressure airflow delivered to the gas-liquid mixing pipe 41 through the inlet 42 flows through the inner ring 416, causing the high-pressure airflow to initially mix with the coolant, forming atomized gas. This atomized gas then flows to the turbine 419, where it rotates under the thrust of the atomized gas flow to swirl the mixed gas. The turbine 419 rotates to further improve the gas-liquid mixing effect. When the turbine 419 rotates, it can drive the rotating shaft 418 and the rotating disk 422 to rotate synchronously. This allows the rotating disk 422 to drive the inner ring 416 and the atomizing nozzle 417 to rotate through the connecting rod 420. During the rotation, the atomizing nozzle 417 can fully spray and distribute the coolant into the gas-liquid mixing pipe 41, further improving the uniformity of the initial distribution of the coolant in the gas-liquid mixing pipe 41. This is beneficial to improving the gas-liquid mixing effect. The more uniform the gas-liquid mixing, the better the cooling, lubrication, and cleaning effect of the mixed atomized gas.

[0054] Example 6

[0055] This embodiment discloses a milling method for medical device accessories, the specific steps of which are as follows:

[0056] First, the parts required for processing medical device accessories are clamped on the fixture 26. Then, the milling cutter 36 is driven by the drive assembly to mill the parts. At the same time, cooling gas and coolant are simultaneously supplied to the gas-liquid mixing assembly through the cooling gas source and coolant source. The cooling gas and coolant are mixed in the gas-liquid mixing assembly to form atomized gas. Then, part of the atomized gas flows through the interior of the milling cutter 36 through the internal cooling assembly to absorb heat and cool the interior of the milling cutter 36. The other part of the atomized gas is flushed and cooled on the exterior of the milling cutter 36 through the external cooling assembly.

[0057] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] The preferred embodiments of the invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A CNC milling machine tool, comprising a frame, characterized in that: The frame is equipped with a positioning mechanism and a milling mechanism located above the positioning mechanism. The positioning mechanism is equipped with a fixture that can clamp and position the workpiece. The milling mechanism includes a drive assembly and a milling cutter. The drive assembly can drive the milling cutter to perform milling operations on the workpiece clamped in the fixture. The frame is also equipped with a cooling mechanism, which includes a gas-liquid mixing component, an internal cooling component, and an external cooling component. The inlet of the gas-liquid mixing component is connected to both a cooling gas source and a cooling liquid source, so that the gas-liquid mixing component can mix the cooling gas and the cooling liquid to form atomized gas. The outlet of the gas-liquid mixing component is connected to both the internal cooling component and the external cooling component. The internal cooling component is located inside the milling cutter, and the external cooling component is located on one side outside the milling cutter, so that the internal cooling component can absorb heat and cool the inside of the milling cutter through atomized gas, and the external cooling component can rinse and cool the outside of the milling cutter through atomized gas. The gas-liquid mixing assembly includes a gas-liquid mixing tube, one end of which is provided with an air inlet and a liquid inlet, a gas-liquid mixing unit is provided inside the gas-liquid mixing tube, and the other end of the gas-liquid mixing tube is provided with an air outlet. The gas-liquid mixing unit includes an outer ring and a support. The outer ring is fixedly installed on the inner wall of the gas-liquid mixing tube and is connected to the liquid inlet. An inner ring is rotatably installed on the inner ring of the outer ring, and the outer ring of the inner ring and the inner ring of the outer ring are connected to each other. Multiple atomizing nozzles are connected to the inner ring of the inner ring. The bracket is fixedly installed on the inner wall of the gas-liquid mixing pipe, and a rotating shaft located at the axis of the gas-liquid mixing pipe is rotatably installed on the bracket. A turbine is fixedly installed at one end of the rotating shaft, and a turntable is fixedly installed at the other end of the rotating shaft. Multiple connecting rods are fixedly installed on the turntable, and one end of each connecting rod is fixedly connected to the end of the inner ring sleeve.

2. The CNC milling machine tool according to claim 1, characterized in that: The positioning mechanism includes a longitudinal drive screw, which is rotatably mounted on the worktable at the lower end of the frame. One end of the longitudinal drive screw is connected to a longitudinal drive motor. Both sides of the longitudinal drive screw are fixedly mounted with longitudinal slide rails. A longitudinal translation slide block is slidably mounted on the longitudinal slide rails. The longitudinal translation slide block is threadedly connected to the longitudinal drive screw.

3. A CNC milling machine tool according to claim 2, characterized in that: The positioning mechanism further includes a transverse drive screw, which is rotatably mounted on a longitudinal translation slide. One end of the transverse drive screw is connected to a transverse drive motor. Transverse slide rails are fixedly mounted on both sides of the transverse drive screw. A transverse translation slide is slidably mounted on the transverse slide rail. The transverse translation slide is threadedly connected to the transverse drive screw. The fixture is fixedly mounted on the top surface of the transverse translation slide.

4. A CNC milling machine tool according to claim 1, characterized in that: The drive assembly includes a lifting drive screw and a lifting slide rail. The lifting slide rail is vertically arranged and fixedly installed on the front side of the frame. A lifting slide block is slidably installed on the lifting slide rail. The lifting drive screw is rotatably installed on the frame. The end of the lifting drive screw is connected to a lifting drive motor, and the lifting drive screw is threadedly connected to the lifting slide block.

5. A CNC milling machine tool according to claim 4, characterized in that: A main shaft is rotatably mounted on the lifting slide. A milling drive motor is fixedly mounted on one side of the main shaft. A transmission wheel is mounted on the output end of the milling drive motor. A driven wheel is fixedly mounted on the upper end of the main shaft. The transmission wheel and the driven wheel are connected by a transmission belt.

6. A CNC milling machine tool according to claim 5, characterized in that: The external cooling assembly includes a delivery conduit, one end of which is connected to an air outlet, and the other end of which extends to one side of the milling cutter and is connected to a spray head.

7. A CNC milling machine tool according to claim 6, characterized in that: The internal cooling assembly includes a branch conduit, a guide channel, and a cooling channel. One end of the branch conduit is connected to and installed on the delivery conduit. Solenoid valves are installed on both the delivery conduit and the branch conduit. An outer connecting sleeve is fixedly connected to and installed on the other end of the branch conduit. An inner connecting sleeve is rotatably installed on the inner ring of the outer connecting sleeve, and the outer connecting sleeve and the inner connecting sleeve are interconnected. The inner connecting sleeve is fixedly installed on the outer ring of the spindle. The guide channel is located inside the spindle, and the cooling channel is located inside the milling cutter. One end of the guide channel is connected to the inner connecting sleeve, and the other end of the guide channel is connected to the cooling channel. The bottom end of the cooling channel is connected to an air distribution groove located inside the milling cutter head. The outer ring of the air distribution groove is provided with multiple spray outlets that communicate with the inner concave part of the outer surface of the milling cutter head.

8. A milling method for medical device accessories, using a CNC milling machine tool as described in any one of claims 1-7, characterized in that, The specific steps are as follows: First, the parts required for processing medical device accessories are clamped on the fixture. Then, the milling cutter is driven by the drive assembly to mill the parts. At the same time, cooling gas and coolant are simultaneously supplied to the gas-liquid mixing assembly through the cooling gas source and coolant source. The cooling gas and coolant are mixed in the gas-liquid mixing assembly to form atomized gas. Then, part of the atomized gas flows through the interior of the milling cutter through the internal cooling assembly to absorb heat and cool the interior of the milling cutter. The other part of the atomized gas is flushed and cooled on the exterior of the milling cutter through the external cooling assembly.

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