Numerical control thread milling machine for fluid connector production

Abstract

The invention relates to the technical field of thread milling machines, and discloses a numerical control thread milling machine for fluid connector production, which comprises a support frame, a multi-shaft milling machine body and a workpiece placing table which are arranged on the support frame, and a machining tool apron which is arranged at the bottom of the multi-shaft milling machine body in a lifting manner, the tool is used for machining a threaded groove of a workpiece. The cooling assembly is arranged on one side of the machining tool apron and used for cooling the machining area and the surface of the tool. According to the numerical control thread milling machine for fluid connector production, when the multi-shaft milling machine body drives the machining tool apron to conduct lifting machining, the adjusting and controlling assembly automatically adjusts the nozzle hole diameter of the spraying head according to the position of the machining tool apron, and the requirements of different machining positions and working conditions for cooling flow and pressure are met through dynamic adjusting and controlling; the problems that a traditional fixed-aperture nozzle is uneven in cooling and low in efficiency are effectively solved, it is guaranteed that a tool works at the proper temperature, and the machining quality and the service life of the tool are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thread milling machines, and particularly relates to a numerically controlled thread milling machine for the production of fluid connectors. Background Art

[0002] A fluid connector is a core component for achieving rapid connection and disconnection of pipelines in a fluid system, and is widely used in fields such as aerospace, medical devices, and high-end equipment. Its function is similar to that of a "plug - socket" in an electrical circuit, but it needs to simultaneously meet the requirements of fluid transmission tightness, anti - vibration performance, and corrosion resistance. This makes the core technical difficulties of such precision devices focus on the machining accuracy of the thread interface. Therefore, a thread milling machine has become the core equipment for the manufacture of high - end fluid connectors, and its technical advantages directly determine the reliability and service life of a precision fluid system.

[0003] During the cutting process, the heat generated by the friction between the tool and the workpiece can raise the local temperature up to 800 - 1200 °C, resulting in the softening of the tool material and thermal deformation of the workpiece. Therefore, during the machining process of the machine tool, it is necessary to spray coolant onto the surface of the workpiece through a nozzle to carry away the heat by the impact of the liquid flow. Usually, a traditional nozzle is installed on the spindle of the machine tool, adopting a spraying mode with a fixed - aperture nozzle. When machining at a low position (such as thread groove cutting), the flow rate of the nozzle 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; while when machining at a high position (such as rapid feed or before tool change), the nozzle of the nozzle cannot expand the spraying range, and it is impossible to achieve uniform cooling of the entire machining area or the tool surface. Summary of the Invention

[0004] Aiming at the above - mentioned shortcomings of the existing technology, the present invention provides a numerically controlled thread milling machine for the production of fluid connectors, which can effectively solve the problem in the existing technology that the traditional nozzle of the machine tool adopts a spraying mode with a fixed - aperture nozzle, affecting the cooling of the cutting area.

[0005] To achieve the above - mentioned purposes, the present invention is realized through the following technical solutions: The present invention provides a numerically controlled thread milling machine for the production of fluid connectors, including a support frame, a multi - axis milling machine body and a workpiece placement table arranged on the support frame, and the workpiece placement table is located in front of the multi - axis milling machine body. It further includes: A machining tool holder, which is arranged in a lifting manner at the bottom of the multi - axis milling machine body and is used for machining the thread grooves of the workpiece; A cooling assembly, which is arranged on one side of the machining tool holder and is used for cooling the machining area and the tool surface. The cooling assembly includes a spray head arranged on one side of the machining tool holder; A regulation assembly, which is arranged on the cooling assembly and is used for automatically adjusting the aperture size of the nozzle of the spray head.

[0006] Furthermore, the cooling assembly also includes a liquid inlet cylinder arranged on the outer wall of the processing tool holder through a fixed plate, and a liquid storage tank arranged on one side of the support frame for storing coolant. The liquid inlet cylinder is connected to the inner cavity of the liquid storage tank through a suction pump and a pipeline. The injection head is arranged at an inclined manner at the bottom of the liquid inlet cylinder, and the injection head intersects with the axis of the processing tool holder at an acute angle.

[0007] Furthermore, a bellows is arranged inside the liquid inlet cylinder, and the bottom end of the bellows is connected to the inner wall of the injection head.

[0008] Furthermore, the regulating component includes a circular baffle plate arranged at the bottom opening of the spray head, and a plurality of water outlet holes are arranged on the circular baffle plate; The water outlet hole comprises a central main hole and a secondary hole group surrounding and opened outside the central main hole. The central main hole is colinear with the axis of the injection head, and each hole of the secondary hole group is parallel to the axis of the injection head.

[0009] Further, a plurality of linear slide grooves are provided in a circular array on the outer wall of the circular baffle, and blades are slidably provided on the plurality of linear slide grooves, and positioning pins are vertically provided at the edges of the blades, and a driving ring is coaxially rotatably provided on the wall of the injection head, and the driving ring is located at the top of the circular baffle; The wall of the driving ring is provided with a spiral guide groove which is slidably matched with the positioning pin.

[0010] Furthermore, a rack is provided on the outer wall of the multi-axis milling machine body, a gear is provided on the machining tool holder through the rotation of the shaft, and the gear is meshed with the rack; A gear ring is arranged on the outer side of the driving ring, and the gear ring is transmission connected with the gear.

[0011] Furthermore, a recovery component for filtering coolant is arranged between the workpiece placement table and the liquid storage tank, and the recovery component includes a liquid guide box arranged at the bottom of the workpiece placement table, the length of the liquid guide box is greater than the diameter of the workpiece placement table and extends to a side close to the liquid storage tank, and an installation pipe is arranged between the liquid guide box and the liquid storage tank.

[0012] Furthermore, an inclined plate is obliquely arranged in the liquid guide box, and the inclined plate is used to guide the coolant containing impurities into the installation pipe.

[0013] Furthermore, a dragon rod is rotatably arranged on the inner side of the mounting tube through a fixing frame, the bottom end of the dragon rod extends to the inner cavity of the liquid storage tank, and a filter is arranged at the bottom end of the dragon rod.

[0014] Furthermore, the filter element comprises a conical mesh cylinder provided at the bottom end of the dragon rod, a filter ring disk is provided at the bottom of the conical mesh cylinder, and a diameter of the filter ring disk is greater than a bottom diameter of the conical mesh cylinder.

[0015] When the body of a multi-axis milling machine drives the machining tool holder to perform lifting machining, the regulation component automatically adjusts the nozzle aperture of the spray head according to the position of the machining tool holder; when machining at a low position, the aperture is reduced so that the coolant is concentrated and sprayed at high pressure onto the cutting area to strengthen the local cooling effect; when machining at a high position, the aperture is enlarged to increase the spraying range of the coolant and achieve uniform cooling of the machining area or the tool surface. Through dynamic regulation, the requirements for cooling flow and pressure at different machining positions and working conditions are matched, effectively solving the problems of uneven cooling and low efficiency of traditional nozzles with fixed apertures, ensuring that the tool works at an appropriate temperature, and improving the machining quality and tool life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings according to these drawings without creative efforts.

[0017] Figure 1 Schematic diagram of the overall structure of the embodiment of the present invention; Figure 2 Schematic diagram of the structure of the spray head in the embodiment of the present invention; Figure 3 Schematic cross-sectional view of the liquid inlet cylinder in the embodiment of the present invention; Figure 4 Schematic diagram of the structure before the driving ring rotates in the embodiment of the present invention; Figure 5 Schematic diagram of the structure after the driving ring rotates in the embodiment of the present invention; Figure 6 Schematic diagram of the structure of the circular baffle and the blade in the embodiment of the present invention; Figure 7 Schematic diagram of the structure of the overall embodiment from another perspective; Figure 8 Schematic cross-sectional view of the liquid storage tank in the embodiment of the present invention; Figure 9 Schematic plan cross-sectional view of the conical mesh cylinder in the embodiment of the present invention.

[0018] The reference numerals in the figure respectively represent: 100, support frame; 200, multi-axis milling machine body; 300, workpiece placement table; 400, machining tool holder; 500, cooling assembly; 501, spray head; 502, liquid inlet cylinder; 503, liquid storage tank; 504, corrugated pipe; 600, regulation assembly; 601, circular baffle; 602, water outlet hole; 603, linear chute; 604, blade; 605, positioning pin; 606, drive ring; 607, spiral guide groove; 608, rack; 609, gear; 610, gear ring; 700, recycling assembly; 701, liquid guide tank; 702, installation pipe; 703, inclined plate; 704, dragon rod; 705, conical mesh cylinder; 706, filter ring disc. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention will be further described below with reference to the embodiments.

[0021] Embodiment 1, referring to Figure 1 - Figure 2 , which is the first embodiment of the present invention, provides a numerically controlled thread milling machine for the production of fluid connectors, including a support frame 100, and 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 in front of the multi-axis milling machine body 200.

[0022] During the cutting process, the heat generated by the friction between the tool and the workpiece can cause the local temperature to reach as high as 800 - 1200 °C, resulting in the softening of the tool material and the thermal deformation of the workpiece. Therefore, during the machining process of the multi-axis milling machine body 200, it is necessary to spray the coolant onto the surface of the workpiece through a nozzle to remove the heat by the impact of the liquid flow. Usually, the traditional nozzle is installed on the spindle of the machining tool holder 400 and corresponds to the tool, adopting a spraying mode with a fixed aperture nozzle. When machining at a low position, such as thread groove cutting, the flow rate of the nozzle 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; while when machining at a high position, such as rapid feed or before tool change, the nozzle cannot expand the spraying range, and it is impossible to uniformly cool the entire machining area or the surface of the tool.

[0023] The present invention further includes: a processing tool holder 400, which is installed at the bottom of the multi-axis milling machine body 200 in a lifting manner and is used for processing the thread grooves of workpieces; a cooling assembly 500, which is installed on one side of the processing tool holder 400 and is used for cooling the processing area and the tool surface. The cooling assembly 500 includes a spray head 501 installed on one side of the processing tool holder 400; a regulation assembly 600, which is installed on the cooling assembly 500 and is used for automatically adjusting the nozzle aperture size of the spray head 501.

[0024] Specifically, when the multi-axis milling machine body 200 drives the processing tool holder 400 to perform lifting processing, the regulation assembly 600 automatically adjusts the nozzle aperture of the spray head 501 according to the position of the processing tool holder 400; when processing at a low position, the aperture is reduced so that the coolant is sprayed intensively at high pressure to the cutting area, strengthening the local cooling effect; when processing at a high position, the aperture is enlarged to increase the spraying range of the coolant, realizing uniform cooling of the processing area or the tool surface. Through this dynamic regulation, the requirements for cooling flow and pressure in different processing positions and working conditions are matched, effectively solving the problems of uneven cooling and low efficiency of traditional fixed-aperture nozzles, ensuring that the tool works at an appropriate temperature, and improving the processing quality and tool life.

[0025] Specifically, when the multi-axis milling machine body 200 drives the processing tool holder 400 to be at a low position for processing, such as when cutting thread grooves, the heat in the cutting area is concentrated, and high precision is required for the pressure and flow rate of the coolant. The regulation assembly 600 automatically reduces the nozzle aperture of the spray head 501. According to the principle of fluid mechanics, with the total output of the coolant remaining unchanged, the smaller aperture makes the spraying pressure of the coolant increase, and it is sprayed to the cutting area in a concentrated high-pressure state, enhancing the impact and penetration ability of the coolant on the high-temperature area and quickly taking away the heat, meeting the requirements of high-pressure and small-range precise cooling in this working condition; when the processing tool holder 400 is at a high position for processing, such as during rapid feeding or before tool change, at this time, it is necessary to perform covering cooling on the entire processing area or the tool surface. The regulation assembly 600 enlarges the nozzle aperture of the spray head 501, increases the outflow area of the coolant, reduces the spraying pressure, so that the coolant can be sprayed in a large area and evenly, and effectively cools the large-area region in a large-flow and wide-range cooling manner. Thus, according to different processing positions and working conditions, the cooling flow and pressure are dynamically adjusted to achieve an ideal cooling effect.

[0026] Specifically, the regulation component 600 may include a variable-diameter nozzle and a position sensor. It adopts a conical valve core or an adjustable valve structure and is driven by a motor or a cylinder (such as a driving mechanism) to change the cross-sectional area of the nozzle outlet. When the machining tool holder 400 moves up and down, the position sensor collects height data in real time and transmits it to the control system. The control system calculates the optimal nozzle aperture according to the machining position (such as precision milling at a low position or tool change at a high position) and outputs a control signal. During low-position machining, the driving mechanism reduces the nozzle aperture (such as the forward movement of the conical valve core) to form a high-pressure concentrated jet for precisely cooling the cutting area. During high-position machining, the driving mechanism enlarges the nozzle aperture (such as the unfolding of the valve) to switch to wide-angle spraying to cover a larger range.

[0027] Embodiment 2. Refer to Figure 1 - Figure 6 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the cooling component 500 further includes a liquid inlet cylinder 502 installed on the outer wall of the machining tool holder 400 through a fixing plate, and a liquid storage tank 503 placed on one side of the support frame 100 for storing coolant. The liquid inlet cylinder 502 is connected to the inner cavity of the liquid storage tank 503 through a suction pump and a pipeline. The spray head 501 is fixedly installed at an inclined angle at the bottom of the liquid inlet cylinder 502, and the spray head 501 intersects the axis of the machining 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.

[0028] Specifically, when the cooling component 500 works, the liquid storage tank 503 stores coolant. After the suction pump is started, the coolant in the liquid storage tank 503 is pumped to the liquid inlet cylinder 502 through the pipeline. After the coolant flows in, it is transported to the spray head 501 through the corrugated pipe 504, so that the coolant is precisely sprayed onto the machining area at an inclined angle to ensure that the coolant can effectively cover the contact part between the tool and the workpiece.

[0029] Specifically, the spray head 501 is installed at an acute angle of inclination to ensure that the coolant can precisely cover the cutting point of the tool, and at the same time avoid interfering with the machining movement. And the inclined spraying can enhance the flushing effect of the coolant, help remove chips, and prevent accumulation from affecting the machining accuracy.

[0030] Refer to Figure 3 , the regulation component 600 includes a circular baffle 601 fixedly installed at the bottom opening of the spray head 501. A number of water outlet holes 602 are provided on the circular baffle 601. The water outlet holes 602 include a central main hole and a group 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 holes in the group of secondary holes are parallel to the axis of the spray head 501.

[0031] Specifically, during low-position machining, only the central main hole is aligned with the outlet of the spray head 501, and the outlet positions of the auxiliary hole group are shielded. At this time, the coolant is only ejected through the central main hole. Due to the small cross-sectional area of the main hole, the coolant has a high flow rate and large pressure, forming a high-pressure concentrated jet, precisely impacting the cutting area, quickly taking away the heat generated by local high temperature, and strengthening the cooling effect. During high-position machining, the central main hole and the auxiliary hole group are simultaneously aligned with the outlet of the spray head 501, and the coolant is ejected through the main hole and the auxiliary hole group at the same time. The total flow cross-sectional area increases, but the flow rate decreases, forming a large-flow dispersed spray, and the coverage area is expanded to the entire machining area or the tool surface to achieve uniform cooling.

[0032] Refer to Figure 4 、 Figure 5 and Figure 6 As shown in FIGS.

[0033] Specifically, when the working position of the machining tool holder 400 descends, the driving ring 606 drives the circular baffle 601 to rotate. The inclined track of the spiral guide groove 607 forces the positioning pin 605 to move radially inward. Under the action of the linear chute 603 restricting the blade 604 to only move radially, several blades 604 slide towards the center of the circle simultaneously, and multiple blades 604 synchronously close towards the center, blocking the auxiliary hole group of the circular baffle 601 and only leaving the central main hole unblocked. When the working position of the machining tool holder 400 ascends, the driving ring 606 drives the circular baffle 601 to rotate in the reverse direction, and the spiral guide groove 607 drives the positioning pin 605 to move radially outward in the reverse direction. The blades 604 unfold towards the outside synchronously, and several blades 604 are completely opened towards the outside, and the auxiliary hole group is completely exposed, and the central main hole and the auxiliary hole group are simultaneously unblocked.

[0034] Refer to Figure 2 As shown in FIG.

[0035] Specifically, when the machining tool holder 400 moves vertically downward along the multi-axis milling machine body 200, it drives the gear 609 to roll along the fixed rack 608. Under the transmission action, the gear 609 drives the toothed ring 610 to rotate clockwise (as shown in Figure 5As shown, the gear ring 610 is fixedly connected to the drive ring 606. The drive ring 606 rotates counterclockwise accordingly. Thus, the positioning pin 605 moves radially inwards along the spiral guide groove 607, and the blades 604 close towards the center, reducing the aperture (only the central main hole is conducting), achieving high-pressure centralized cooling. The remaining structure is the same as that of Embodiment 1.

[0036] Embodiment 3, referring to Figure 1 - Figure 9 , is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that a recycling component 700 for filtering the coolant is installed between the workpiece placement table 300 and the liquid storage tank 503. The recycling component 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 one side close to the liquid storage tank 503. An installation pipe 702 is fixedly installed between the liquid guide tank 701 and the liquid storage tank 503; an inclined plate 703 is installed obliquely in the liquid guide tank 701, and the inclined plate 703 is used to guide the coolant containing impurities into the installation pipe 702.

[0037] Specifically, a primary screening filter plate adapted to its outer shape can be fixedly installed at the top of the liquid guide tank 701 to preliminarily filter metal chips and impurities with a relatively large density.

[0038] Specifically, during the processing, the coolant (carrying metal chips, impurities, etc. 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 coolant containing impurities flows into the liquid guide tank 701, it will flow along the surface of the inclined plate 703 towards the lower place (the direction of the installation pipe 702), facilitating subsequent filtration and recycling.

[0039] Referring to Figure 8 and Figure 9 , a screw rod 704 is rotatably arranged inside the installation pipe 702 through a fixing frame. The bottom end of the screw rod 704 extends into the inner cavity of the liquid storage tank 503, and a filtering member is installed at the bottom end of the screw rod 704; the filtering member includes a conical mesh cylinder 705 fixedly installed at the bottom end of the screw rod 704. A filtering ring plate 706 is integrally formed and connected to the bottom of the conical mesh cylinder 705, and the diameter of the filtering ring plate 706 is greater than the bottom diameter of the conical mesh cylinder 705.

[0040] Specifically, the inclined plate 703 in the liquid guide box 701 guides the coolant 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 (similar to the vortex of the drain outlet) in the installation pipe 702, and the rotation direction of the vortex matches the spiral direction of the dragon rod 704 (such as a right-handed screw with a clockwise vortex), and the fluid impacts the dragon rod 704, driving the dragon rod 704 to passively rotate (similar to the principle of a water turbine), and then the impurities fall into the inner side of the conical mesh tube 705 with the coolant, and gradually fall into the filter ring disc 706 under the action of gravity. Since the dragon rod 704 drives the conical mesh tube 705 and the filter ring disc 706 to rotate synchronously, the centrifugal effect generated by the rotation pushes the impurities to the inner side wall edge of the filter ring disc 706, avoiding concentrated blockage of the mesh holes and improving the separation effect. The remaining structure is the same as that of Example 2.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A numerically controlled thread milling machine for the production of fluid connectors, comprising a support frame (100), a multi-axis milling machine body (200) and a workpiece placement table (300) provided on the support frame (100), and the workpiece placement table (300) is located in front of the multi-axis milling machine body (200), characterized in that, Also includes: A machining tool holder (400) is arranged in a lifting manner at the bottom of the multi-axis milling machine body (200) and is used for machining a thread groove of a workpiece; A cooling component (500) is arranged on one side of the processing tool holder (400) and is used to cool the processing area and the tool surface. The cooling component (500) comprises a spray head (501) arranged on one side of the processing tool holder (400); The regulating component (600) is arranged on the cooling component (500) and is used to automatically adjust the nozzle aperture size of the injection head (501).

2. The numerically controlled thread milling machine for the production of fluid connectors according to claim 1, wherein The cooling assembly (500) further comprises a liquid inlet cylinder (502) arranged on the outer wall of the processing tool holder (400) via a fixing plate, and a liquid storage tank (503) arranged on one side of the support frame (100) for storing cooling liquid, wherein the liquid inlet cylinder (502) is connected to the inner cavity of the liquid storage tank (503) via a suction pump and a pipeline, and the injection head (501) is arranged at an inclined position at the bottom of the liquid inlet cylinder (502), and the injection head (501) intersects with the axis of the processing tool holder (400) at an acute angle.

3. The numerically controlled thread milling machine for fluid connector production according to claim 2, characterized in that A bellows (504) is provided inside the liquid inlet cylinder (502), and the bottom end of the bellows (504) is connected to the inner wall of the injection head (501).

4. The numerically controlled thread milling machine for producing fluid connectors according to claim 1, wherein, The regulating component (600) comprises a circular baffle (601) arranged at the bottom opening of the spray head (501), and a plurality of water outlet holes (602) are provided on the circular baffle (601); The water outlet hole (602) comprises a central main hole and a group of auxiliary holes arranged around the central main hole, the central main hole is colinear with the axis of the injection head (501), and each hole of the group of auxiliary holes is parallel to the axis of the injection head (501).

5. The numerically controlled thread milling machine for producing fluid connectors according to claim 4, characterized in that, A plurality of linear slide grooves (603) are provided in a circular array on the outer wall of the circular baffle (601), blades (604) are slidably provided on the plurality of linear slide grooves (603), positioning pins (605) are vertically provided at the edges of the blades (604), a drive ring (606) is coaxially rotatably provided on the wall of the injection head (501), and the drive ring (606) is located at the top of the circular baffle (601); The wall of the driving ring (606) is provided with a spiral guide groove (607) which is slidably matched with the positioning pin (605).

6. The numerically controlled thread milling machine for fluid connector production according to claim 5, wherein, A rack (608) is provided on the outer wall of the multi-axis milling machine body (200); a gear (609) is provided on the machining tool holder (400) for rotation via a shaft, and the gear (609) is meshed with the rack (608); A gear ring (610) is provided on the outer side of the driving ring (606), and the gear ring (610) is transmission-connected to the gear (609).

7. The numerically controlled thread milling machine for producing fluid connectors according to claim 2, wherein, A recycling component (700) for filtering the coolant is provided between the workpiece placing table (300) and the liquid storage tank (503). The recycling component (700) includes a liquid guiding tank (701) arranged at the bottom of the workpiece placing table (300). The length of the liquid guiding tank (701) is greater than the diameter of the workpiece placing table (300) and extends to one side close to the liquid storage tank (503). An installation pipe (702) is arranged between the liquid guiding tank (701) and the liquid storage tank (503).

8. The numerically controlled thread milling machine for fluid connector production according to claim 7, wherein, An inclined plate (703) is arranged in the liquid guiding tank (701) in an inclined manner. The inclined plate (703) is used for guiding the coolant containing impurities into the installation pipe (702).

9. The numerically controlled thread milling machine for fluid connector production according to claim 7, characterized in that, A dragon rod (704) is rotatably arranged inside the installation pipe (702) through a fixing frame. The bottom end of the dragon rod (704) extends into the inner cavity of the liquid storage tank (503), and a filtering member is arranged at the bottom end of the dragon rod (704).

10. The numerically controlled thread milling machine for producing fluid connectors according to claim 9, wherein, The filtering member includes a conical mesh cylinder (705) arranged at the bottom end of the dragon rod (704). A filtering ring plate (706) is arranged at the bottom of the conical mesh cylinder (705). The diameter of the filtering ring plate (706) is greater than the bottom diameter of the conical mesh cylinder (705).

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