Numerical control thread milling machine for fluid connector production

Abstract

The present application relates to thread milling machine technical field, and discloses a kind of numerical control thread milling machine for fluid connector production, including support frame, and the workpiece placement table of multiaxis milling machine body and being set on support frame, and workpiece placement table is located at the front of multiaxis milling machine body, further include: processing tool holder, it is in the form of lift and set in the bottom of multiaxis milling machine body, for processing the thread groove of workpiece;Cooling assembly, it is set at the side of processing tool holder, for cooling processing area and tool surface.The numerical control thread milling machine for fluid connector production, when multiaxis milling machine body drives processing tool holder to carry out lift processing, control component is automatically adjusted the nozzle aperture of spray head according to processing tool holder position, through dynamic control, match the demand of cooling flow, pressure to different processing position, working condition, effectively solve the problem of uneven cooling, low efficiency of traditional fixed aperture nozzle, ensure that tool works at suitable temperature, improve processing quality and tool life.

Description

Technical Field

[0001] This invention relates to the field of thread milling technology, and more specifically to a CNC thread milling machine for the production of fluid connectors. Background Technology

[0002] Fluid connectors are core components that enable rapid connection and disconnection of pipelines in fluid systems. They are widely used in aerospace, medical devices, high-end equipment and other fields. Their function is similar to a "plug-socket" in an electrical circuit, but they must simultaneously meet the requirements of fluid transmission sealing, vibration resistance and corrosion resistance. This makes the core technical difficulty of such precision devices concentrated on the machining accuracy of the threaded interface. Therefore, thread milling machines have become the core equipment for manufacturing high-end fluid connectors, and their technical advantages directly determine the reliability and service life of precision fluid systems.

[0003] During the cutting process, the heat generated by the friction between the tool and the workpiece can reach local temperatures as high as 800-1200℃, causing the tool material to soften and the workpiece to deform thermally. Therefore, it is necessary to spray coolant onto the workpiece surface through a nozzle during machine tool processing, using the liquid flow impact to remove heat. Typically, traditional nozzles are mounted on the machine tool spindle and use a fixed-aperture nozzle spray pattern. This results in insufficient nozzle flow or dispersed spray during low-level machining (such as thread grooving), leading to inadequate cooling of the cutting area and rapid tool wear due to high temperatures. Conversely, during high-level machining (such as rapid feed or before tool change), the nozzle cannot expand the spray range, failing to achieve uniform cooling of the entire machining area or the tool surface. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a CNC thread milling machine for fluid connector production, which effectively solves the problem in existing technologies where the traditional spray nozzles use fixed-diameter nozzles, affecting the cooling of the cutting area.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a CNC thread milling machine for producing fluid connectors, including a support frame, a multi-axis milling machine body and a workpiece placement stage disposed on the support frame, wherein the workpiece placement stage is located on the front of the multi-axis milling machine body, and further comprising:

[0007] The machining tool holder is mounted in a lifting manner at the bottom of the multi-axis milling machine body and is used to machine the thread grooves of the workpiece;

[0008] A cooling assembly, disposed on one side of the machining tool holder, is used to cool the machining area and the tool surface. The cooling assembly includes a spray head disposed on one side of the machining tool holder.

[0009] A regulating assembly is arranged on the cooling assembly to automatically adjust the nozzle aperture size of the spray head.

[0010] Further, the cooling assembly further comprises a liquid inlet cylinder arranged on the outer wall of the machining tool holder through a fixing plate, and a liquid storage tank arranged on one side of the support frame for storing the cooling liquid. The liquid inlet cylinder is connected in communication with the inner cavity of the liquid storage tank through a pipeline matched with a suction pump. The spray head is arranged in an inclined manner at the bottom of the liquid inlet cylinder, and the spray head intersects with the axis of the machining tool holder at an acute angle.

[0011] Further, a bellows is arranged inside the liquid inlet cylinder, and the bottom end of the bellows is connected with the inner side wall of the spray head.

[0012] Further, the regulating assembly comprises a circular baffle arranged at the opening at the bottom of the spray head, and a plurality of water outlet holes are arranged on the circular baffle.

[0013] The water outlet holes comprise a central main hole and a plurality of secondary holes arranged around the outside of the central main hole. The central main hole is collinear with the axis of the spray head, and each hole of the plurality of secondary holes is parallel to the axis of the spray head.

[0014] Further, a plurality of linear sliding grooves are arranged in an annular array on the outer wall of the circular baffle, and a plurality of blades are slidingly arranged in the plurality of linear sliding grooves. A positioning pin is arranged perpendicularly at the edge of each blade. A driving ring is coaxially arranged on the wall of the spray head, and the driving ring is located at the top of the circular baffle.

[0015] A helical guide groove is arranged on the wall of the driving ring and slidingly matches with the positioning pin.

[0016] Further, a rack is arranged on the outer wall of the multi-axis milling machine body. A gear is arranged on the machining tool holder through a shaft and engages with the rack.

[0017] A gear ring is arranged on the outside of the driving ring and is in transmission connection with the gear.

[0018] Further, a recycling assembly for filtering the cooling liquid is arranged between the workpiece placement table and the liquid storage tank. The recycling assembly comprises a liquid guide tank arranged at the bottom of the workpiece placement table. The length of the liquid guide tank is greater than the diameter of the workpiece placement table, and the liquid guide tank extends to the side close to the liquid storage tank. An installation pipe is arranged between the liquid guide tank and the liquid storage tank.

[0019] Further, an inclined plate is arranged in the liquid guide tank. The inclined plate is used to guide the cooling liquid containing impurities into the installation pipe.

[0020] Further, the inner side of the installation pipe is provided with a Jiaolong rod through the rotation of the fixing frame, the bottom end of the Jiaolong rod extends to the inner cavity of the liquid storage tank, and the bottom end of the Jiaolong rod is provided with a filter element.

[0021] Further, the filter element comprises a conical mesh tube arranged at the bottom end of the Jiaolong rod, and the bottom of the conical mesh tube is provided with a filter ring disc, and the diameter of the filter ring disc is greater than the diameter of the bottom of the conical mesh tube.

[0022] When the multi-axis milling machine body drives the machining tool holder to process lifting, the regulating assembly automatically adjusts the nozzle aperture of the spray head according to the position of the machining tool holder; when processing in a low position, the aperture is reduced, so that the cooling liquid is concentratedly sprayed to the cutting area at high pressure, and the local cooling effect is strengthened; when processing in a high position, the aperture is expanded, and the spraying range of the cooling liquid is increased, so that uniform cooling of the machining area or the tool surface is realized; through dynamic regulation and control, the cooling flow and pressure requirements of different machining positions and working conditions are matched, the problems of uneven cooling and low efficiency of the traditional fixed-aperture nozzle are effectively solved, the tool is ensured to work at an appropriate temperature, and the machining quality and tool life are improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the structure of the spray head of the embodiment of the present application;

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the liquid inlet cylinder of the embodiment of the present application;

[0027] Figure 4 It is a schematic diagram of the structure of the embodiment of the present application before the driving ring rotates;

[0028] Figure 5 It is a schematic diagram of the structure of the embodiment of the present application after the driving ring rotates;

[0029] Figure 6 It is a schematic diagram of the structure of the circular baffle and the blade of the embodiment of the present application;

[0030] Figure 7 It is a schematic diagram of the overall structure of the embodiment of the present application from another perspective;

[0031] Figure 8A cross-sectional structure schematic diagram of a liquid storage tank of the embodiment of the present application;

[0032] Figure 9 A plane cross-sectional structure schematic diagram of a conical mesh cylinder of the embodiment of the present application.

[0033] The reference numbers in the figure respectively represent: 100, a support frame; 200, a multi-axis milling machine body; 300, a workpiece placement table; 400, a machining tool seat; 500, a cooling assembly; 501, a spraying head; 502, a liquid inlet cylinder; 503, a liquid storage tank; 504, a bellows; 600, a control assembly; 601, a circular baffle; 602, a water outlet hole; 603, a linear sliding groove; 604, a blade; 605, a positioning pin; 606, a driving ring; 607, a spiral guide groove; 608, a rack; 609, a gear; 610, a toothed ring; 700, a recovery assembly; 701, a liquid guide tank; 702, a mounting pipe; 703, an inclined plate; 704, a rod; 705, a conical mesh cylinder; 706, a filter ring disc. DETAILED DESCRIPTION

[0034] To make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the technical scheme in the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiment in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the present application.

[0035] The present application will be further described below in combination with the embodiments.

[0036] Embodiment 1, refer to Figures 1-2 The first embodiment of the present application provides a numerical control thread milling machine for fluid connector production, which comprises a support frame 100, a multi-axis milling machine body 200 and a workpiece placement table 300 installed on the support frame 100, and the workpiece placement table 300 is located on the front of the multi-axis milling machine body 200.

[0037] During the cutting process, the heat generated by the friction between the tool and the workpiece can make the local temperature as high as 800-1200℃, resulting in the softening of the tool material and the thermal deformation of the workpiece, so that the cooling liquid needs to be sprayed to the surface of the workpiece through the spraying head during the machining process of the multi-axis milling machine body 200 to take away the heat by the liquid flow. Usually, the conventional spraying head is installed on the spindle of the machining tool seat 400 and corresponds to the tool, adopts the spraying mode of fixed aperture nozzle, so that when machining at low position such as thread groove cutting, the flow of the spraying head is insufficient or the spraying is dispersed, resulting in insufficient cooling of the cutting area and rapid wear of the tool due to high temperature; and when machining at high position such as rapid feeding or before tool changing, the spraying head cannot expand the spraying range, failing to achieve uniform cooling of the entire machining area or the surface of the tool.

[0038] The application also comprises: a machining tool holder 400 installed in the bottom of the multi-axis milling machine body 200 in a lifting manner, used for machining the thread groove of the workpiece; a cooling assembly 500 installed on one side of the machining tool holder 400, used for cooling the machining area and the tool surface, the cooling assembly 500 comprising a spray head 501 installed on one side of the machining tool holder 400; and a regulating assembly 600 installed on the cooling assembly 500, used for automatically adjusting the nozzle aperture size of the spray head 501.

[0039] Specifically, when the multi-axis milling machine body 200 drives the machining tool holder 400 to perform lifting machining, the regulating assembly 600 automatically adjusts the nozzle aperture of the spray head 501 according to the position of the machining tool holder 400; the aperture is reduced when machining at a low position, so that the cooling liquid is concentratedly sprayed to the cutting area at high pressure, and the local cooling effect is strengthened; the aperture is enlarged when machining at a high position, so that the spraying range of the cooling liquid is increased, and uniform cooling of the machining area or the tool surface is realized. Through such dynamic regulation, the cooling flow and pressure requirements of different machining positions and working conditions are matched, the problems of uneven cooling and low efficiency of the traditional fixed-aperture nozzle are effectively solved, the tool is ensured to work at an appropriate temperature, and the machining quality and tool life are improved.

[0040] Specifically, when the multi-axis milling machine body 200 drives the machining tool holder 400 to be at a low position for machining, such as thread groove cutting, the heat is concentrated in the cutting area, and the precision of the cooling liquid pressure and flow is high, the regulating assembly 600 automatically reduces the nozzle aperture of the spray head 501, according to the principle of fluid mechanics, under the condition that the total amount of the cooling liquid output is unchanged, the smaller aperture increases the spraying pressure of the cooling liquid, so that the cooling liquid is sprayed to the cutting area in a high-pressure concentrated state, the impact and penetration ability of the cooling liquid on the high-temperature area are enhanced, the heat is quickly taken away, and the requirements of high pressure and small range precision cooling under this working condition are met; when the machining tool holder 400 is at a high position for machining, such as rapid feeding or before tool changing, the whole machining area or the tool surface needs to be covered and cooled, the regulating assembly 600 enlarges the nozzle aperture of the spray head 501, increases the outflow area of the cooling liquid, and reduces the spraying pressure, so that the cooling liquid can be sprayed in a large area and uniformly, and the effective cooling of the large-area area is realized in a large-flow and wide-range cooling mode, so that the cooling flow and pressure are dynamically adjusted according to different machining positions and working conditions, and the ideal cooling effect is achieved.

[0041] Specifically, the regulating assembly 600 can include a variable-diameter nozzle, a position sensor, a conical valve core or an adjustable valve structure, and the nozzle outlet cross-sectional area is changed by a driving mechanism such as a motor or a pneumatic cylinder. When the tool holder 400 is raised, the position sensor collects height data in real time and transmits it to the control system. The control system calculates the optimal nozzle diameter according to the machining position (such as low-position fine milling or high-position tool changing), and outputs a control signal. When machining at a low position, the driving mechanism reduces the nozzle diameter (such as moving the conical valve core forward), forming a high-pressure concentrated jet to accurately cool the cutting area. When machining at a high position, the driving mechanism expands the nozzle diameter (such as unfolding the valve), switching to wide-angle spraying to cover a larger area.

[0042] Embodiment 2, refer to Figures 1-6 For the second embodiment of the present application, which is different from the first embodiment, the cooling assembly 500 further includes a liquid inlet cylinder 502 mounted on the outer wall of the tool holder 400 through a fixing plate, and a liquid storage tank 503 placed on one side of the support frame 100 for storing cooling liquid. The liquid inlet cylinder 502 is connected in communication with the inner cavity of the liquid storage tank 503 through a suction pump and a pipeline. The spray head 501 is fixedly installed at the bottom of the liquid inlet cylinder 502 in an inclined manner, and the spray head 501 intersects with the axis of the tool holder 400 at an acute angle. A corrugated pipe 504 is installed inside the liquid inlet cylinder 502, and the bottom end of the corrugated pipe 504 is connected to the inner side wall of the spray head 501.

[0043] Specifically, when the cooling assembly 500 is working, the liquid storage tank 503 stores cooling liquid. After the suction pump is started, the cooling liquid in the liquid storage tank 503 is pumped to the liquid inlet cylinder 502 through the pipeline. The cooling liquid flows into the spray head 501 through the corrugated pipe 504, so that the cooling liquid is accurately sprayed to the machining area at an inclined angle, ensuring that the cooling liquid can effectively cover the contact part of the tool and the workpiece.

[0044] Specifically, the spray head 501 is installed at an acute angle to ensure that the cooling liquid can accurately cover the cutting point of the tool, while avoiding interference with the machining movement. In addition, the inclined spraying can enhance the flushing effect of the cooling liquid, help to remove the chips, and prevent the accumulation from affecting the machining precision.

[0045] Refer to Figure 3 The regulating assembly 600 includes a circular baffle 601 fixedly installed at the bottom opening of the spray head 501, and a plurality of water outlet holes 602 are arranged on the circular baffle 601. The water outlet holes 602 include a central main hole and a plurality of secondary holes arranged around the outside of the central main hole. The central main hole is collinear with the axis of the spray head 501, and the secondary holes are parallel to the axis of the spray head 501.

[0046] Specifically, in low position processing, only the center main hole is aligned with the outlet of the spray head 501, and the secondary hole group is shielded from the outlet position, at this time the cooling liquid is sprayed out only through the center main hole, because the cross-sectional area of the main hole is small, the flow rate of the cooling liquid is high, and the pressure is large, forming a high-pressure concentrated jet, accurately impacting the cutting area, quickly taking away the heat generated by the local high temperature, and strengthening the cooling effect; in high position processing, the center main hole and the secondary hole group are aligned with the outlet of the spray head 501 at the same time, and the cooling liquid is sprayed out through the main hole and the secondary hole group at the same time, the total flow cross-sectional area is increased, but the flow rate is reduced, forming a large flow dispersion spray, the coverage range is expanded to the entire machining area or tool surface, and uniform cooling is realized.

[0047] Referring to Figure 4 , Figure 5 and Figure 6 , a plurality of linear sliding grooves 603 are arranged in a ring shape on the outer wall of the circular baffle 601, a plurality of blades 604 are slidably installed in the linear sliding grooves 603, a positioning pin 605 is vertically fixedly connected or welded at the edge of the blade 604, a driving ring 606 is coaxially rotatably installed on the wall of the spray head 501, and the driving ring 606 is located at the top of the circular baffle 601; a spiral guide groove 607 is formed in the wall of the driving ring 606 and slidably cooperates with the positioning pin 605.

[0048] Specifically, when the machining tool holder 400 is lowered, the driving ring 606 drives the circular baffle 601 to rotate, the inclined trajectory of the spiral guide groove 607 forces the positioning pin 605 to move radially inward, under the action of the linear sliding groove 603 which limits the blade 604 to only move radially, a plurality of blades 604 simultaneously slide toward the center, a plurality of blades 604 are synchronously folded toward the center, shielding the secondary hole group of the circular baffle 601, and only the center main hole is kept open.

[0049] Referring to Figure 2 , a rack 608 is installed on the outer wall of the multi-axis milling machine body 200, a gear 609 is rotatably installed on the machining tool holder 400 through a shaft, and the gear 609 is engaged with the rack 608; a gear ring 610 is fixedly sleeved on the outside of the driving ring 606, and the gear ring 610 is in transmission connection with the gear 609.

[0050] Specifically, the machining tool holder 400 moves vertically downward along the multi-axis milling machine body 200, driving the gear 609 to roll along the fixed rack 608, under the transmission action, the gear 609 drives the gear ring 610 to rotate clockwise (as Figure 5As shown in FIG. 6, the tooth ring 610 is fixedly connected with the driving ring 606, and the driving ring 606 rotates counterclockwise, so that the positioning pin 605 moves radially inward along the spiral guide groove 607, the blade 604 is folded to the center, the aperture is reduced (only the central main hole is conductive), and high pressure concentrated cooling is realized. The rest of the structure is the same as that of example 1.

[0051] Example 3, refer to Figures 1-9 As a third embodiment of the present application, the difference between this embodiment and the second embodiment is that a recycling assembly 700 for filtering the cooling liquid is installed between the workpiece placement table 300 and the liquid storage tank 503. The recycling assembly 700 includes a liquid guide tank 701 fixedly installed at the bottom of the workpiece placement table 300. The length of the liquid guide tank 701 is greater than the diameter of the workpiece placement table 300 and extends to the side close to the liquid storage tank 503. A mounting pipe 702 is fixedly installed between the liquid guide tank 701 and the liquid storage tank 503. An inclined plate 703 is obliquely installed in the liquid guide tank 701, and the inclined plate 703 is used to guide the cooling liquid containing impurities into the mounting pipe 702.

[0052] Specifically, a preliminary sieve filter plate matching the shape of the liquid guide tank 701 can be fixedly installed at the top of the liquid guide tank 701 to preliminarily filter the metal chips and impurities with high density.

[0053] Specifically, during processing, the cooling liquid (carrying metal chips, impurities and the like generated by cutting) drips or splashes from the workpiece surface onto the workpiece placement table 300, and then flows into the liquid guide tank 701. After the cooling liquid containing impurities flows into the liquid guide tank 701, it will flow along the surface of the inclined plate 703 to the lower part (the direction of the mounting pipe 702), which is convenient for subsequent filtering and recycling.

[0054] Refer to Figure 8 And Figure 9 The inside of the mounting pipe 702 is rotatably provided with a Jiaolong rod 704 through a fixed frame. The bottom end of the Jiaolong rod 704 extends into the inner cavity of the liquid storage tank 503, and a filter element is installed at the bottom end of the Jiaolong rod 704. The filter element includes a conical mesh cylinder 705 fixedly installed at the bottom end of the Jiaolong rod 704. A filter ring disc 706 is integrally connected to the bottom of the conical mesh cylinder 705, and the diameter of the filter ring disc 706 is greater than the diameter of the bottom of the conical mesh cylinder 705.

[0055] Specifically, the inclined plate 703 in the liquid guide box 701 guides the cooling liquid containing impurities to flow into the installation pipe 702 at an inclined angle, forming a tangential flow velocity component, so that the liquid generates a rotating vortex in the installation pipe 702 (similar to the vortex of a drain), the rotating direction of the vortex matches the spiral direction of the dragon rod 704 (such as a right-handed screw matching a clockwise vortex), the fluid impacts the dragon rod 704, driving the passive rotation of the dragon rod 704 (similar to the principle of a water turbine), and then the impurities fall into the inside of the conical mesh cylinder 705 with the cooling liquid, gradually falling into the filter ring disc 706 under the action of gravity, since the dragon rod 704 drives the conical mesh cylinder 705 and the filter ring disc 706 to rotate synchronously, the centrifugal action generated by the rotation pushes the impurities to the inner wall edge of the filter ring disc 706, avoiding the concentration of the mesh holes, and improving the separation effect. The rest of the structure is the same as that of example 2.

[0056] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A numerical control thread milling machine for fluid connector production, comprising a support frame (100), a multi-axis milling machine body (200) and a workpiece placement table (300) disposed on the support frame (100), and the workpiece placement table (300) is located on the front face of the multi-axis milling machine body (200), characterized in that, Also include: Processing tool holder (400), set in the multi-axis milling machine body (200) bottom, for processing workpiece thread groove; Cooling assembly (500), provided on one side of the processing tool holder (400), for cooling processing area and tool surface, the cooling assembly (500) includes a spray head (501) provided on one side of the processing tool holder (400); Regulation assembly (600), provided on the cooling assembly (500), for automatic adjustment of the nozzle aperture size of the spray head (501); The cooling assembly (500) further comprises a liquid inlet cylinder (502) provided on the outer wall of the processing tool holder (400) through a fixed plate, and a liquid storage tank (503) provided on one side of the support frame (100) for storing cooling liquid, the liquid inlet cylinder (502) is connected with the inner cavity of the liquid storage tank (503) through a suction pump and a pipeline, the spray head (501) is obliquely arranged at the bottom of the liquid inlet cylinder (502), and the spray head (501) and the axis of the processing tool holder (400) intersect at an acute angle; The regulation assembly (600) includes a circular baffle (601) provided on the bottom opening of the spray head (501), and a plurality of water outlets (602) are arranged on the circular baffle (601); The water outlet (602) includes a central main hole and a plurality of auxiliary holes arranged outside the central main hole, the central main hole is collinear with the axis of the spray head (501), and each hole of the auxiliary hole group is parallel to the axis of the spray head (501).

2. The numerical control thread milling machine for fluid connector production according to claim 1, wherein The inner side of the liquid inlet cylinder (502) is provided with a bellows (504), and the bottom end of the bellows (504) is connected with the inner side wall of the spray head (501).

3. The numerical control thread milling machine for fluid connector production according to claim 2, wherein A plurality of linear sliding grooves (603) are arranged in an annular array on the outer wall of the circular baffle (601), a plurality of blades (604) are slidably arranged in the linear sliding grooves (603), a positioning pin (605) is vertically arranged at the edge of the blade (604), a driving ring (606) is coaxially arranged on the wall of the spray head (501), and the driving ring (606) is located on the top of the circular baffle (601). A spiral guide groove (607) is arranged on the wall of the driving ring (606) and slidably matched with the positioning pin (605).

4. The numerical control thread milling machine for fluid connector production according to claim 3, wherein A rack (608) is arranged on the outer wall of the multi-axis milling machine body (200), a gear (609) is rotatably arranged on the processing tool holder (400) through a shaft, and the gear (609) is engaged with the rack (608); The outer side of the driving ring (606) is provided with a tooth ring (610), and the tooth ring (610) is in transmission connection with the gear (609).

5. The numerical control thread milling machine for fluid connector production according to claim 1, wherein The workpiece placing table (300) and the liquid storage tank (503) are provided with a recovery assembly (700) for filtering the cooling liquid, the recovery assembly (700) comprises a liquid guide tank (701) arranged at the bottom of the workpiece placing table (300), the length of the liquid guide tank (701) is greater than the diameter of the workpiece placing table (300), and the liquid guide tank (701) extends to one side close to the liquid storage tank (503), and the liquid guide tank (701) and the liquid storage tank (503) are provided with a mounting pipe (702).

6. The numerical control thread milling machine for fluid connector production according to claim 5, wherein An inclined plate (703) is arranged in the liquid guide tank (701), the inclined plate (703) is used for guiding the cooling liquid containing impurities into the mounting pipe (702).

7. The numerical control thread milling machine for fluid connector production according to claim 5, wherein The inner side of the mounting pipe (702) is rotatably provided with a Jiaolong rod (704) through a fixing frame, the bottom end of the Jiaolong rod (704) extends into the inner cavity of the liquid storage tank (503), and the bottom end of the Jiaolong rod (704) is provided with a filter.

8. The numerical control thread milling machine for fluid connector production according to claim 7, wherein The filter comprises a conical mesh cylinder (705) arranged at the bottom end of the Jiaolong rod (704), the bottom of the conical mesh cylinder (705) is provided with a filter ring disc (706), and the diameter of the filter ring disc (706) is greater than the diameter of the bottom of the conical mesh cylinder (705).

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