Extracorporeal blood treatment apparatus and method for operating an extracorporeal blood treatment apparatus

Abstract

The application provides a turning device and method for a thin-walled pipe fitting with an external thread, and belongs to the technical field of intelligent manufacturing equipment industry. The turning device and method for the thin-walled pipe fitting with the external thread comprises a machining lathe, a pipe fitting guiding assembly, a cutting machining sleeve, a ejector pin base and an ejector pin rod. The machining base is slidingly connected to the upper end of the machining lathe, the cutting machining sleeve is fixedly connected to the upper end of the machining base, the ejector pin base is fixedly connected to the upper end of the machining lathe, and the cutting machining sleeve is fixedly connected in the ejector pin base. The device can effectively reduce the cutting temperature, reduce tool wear, improve machining precision and surface quality, and prevent secondary cutting and equipment blockage caused by accumulation of chips.

Description

Technical Field

[0001] This invention belongs to the field of threaded pipe processing technology, specifically relating to a turning device and processing method for thin-walled pipes with external threads. Background Technology

[0002] In the existing technology and intelligent manufacturing equipment industry, thread processing is a process that uses tools for making threads and adopts processes such as cutting, turning, milling, and grinding to process workpieces. It generally refers to the method of processing threads on workpieces with forming tools or grinding wheels, mainly including turning, milling, tapping, threading, grinding, lapping and whirl cutting.

[0003] A search revealed a thread processing machine disclosed in Chinese patent CN108500404B. This machine comprises a tapping main unit and a feeder, connected by a slide mechanism. The proposed new thread processing machine is inexpensive, composed of multiple mechanisms, and not only provides conveying and processing functions. The feeder can integrate and sort workpieces, transporting them systematically with high feeding speed, increasing work efficiency and reducing noise. The tapping main unit simultaneously cleans the product surface and inspects product quality. Operation is simple, requiring minimal worker skills and reducing labor costs. Workpiece switching is easy during operation, and problems can be quickly detected when malfunctions occur or maintenance is needed. The simple replacement mechanism significantly reduces maintenance costs. The design modifies the previous open-type processing, creating a closed-type processing system to prevent oil mist splashing and environmental pollution during processing. Furthermore, the processing oil is further recycled and filtered, making it more environmentally friendly and durable.

[0004] The above-mentioned technical solution avoids oil splattering and environmental pollution during processing by forming threads with a tapping machine. It also further recovers and filters the processing oil, making it more environmentally friendly and durable. However, the high temperature generated during the cutting of the threaded tube cannot be dissipated in time, which may aggravate tool wear and affect processing accuracy and workpiece surface quality. At the same time, the lack of an active cleaning mechanism for cutting chips can easily lead to chip accumulation, which in turn can cause equipment blockage, reduced processing stability, and even affect product quality and equipment lifespan. Furthermore, the reliability of the workpiece to be processed is required during the threading process, especially for thin-walled pipes. If the fixation is unreliable, the threads processed on the pipe wall may be inaccurate or the pipe wall may be prone to breakage. Summary of the Invention

[0005] The purpose of this invention is to provide a machining device and method for turning thin-walled tubes with external threads, aiming to solve the problem in the existing intelligent manufacturing equipment industry where the high temperature generated during the cutting of threaded tubes cannot be dissipated in time, which may aggravate tool wear and affect machining accuracy and workpiece surface quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A machining apparatus for thin-walled tubes with external threads, for machining thin-walled tubes, includes: a machining lathe; and also includes a tube guiding assembly, a cooling assembly, a circulation assembly, and a separation assembly;

[0008] The tube guide assembly includes a machining sleeve, an ejector base, and an ejector rod. The machining sleeve is mounted on a machining lathe, the ejector base is fixedly connected to the upper end of the machining lathe, and the ejector rod is fixedly connected inside the ejector base. The thin-walled tube to be machined is placed inside the machining sleeve, and one end of the thin-walled tube to be machined is in contact with the ejector rod. A cutting blade is provided at the upper end of the machining sleeve.

[0009] A machining drive motor is installed on the machining lathe at the other end of the thin-walled tube to be processed. A flow-guiding rotating tube is fixedly connected to the output end of the machining drive motor. An outward expansion fixing tube is fixedly connected to the output end of the flow-guiding rotating tube. An outward expansion component is provided inside the outward expansion fixing tube. The outward expansion component expands outward along the radial direction of the thin-walled tube to be processed, thereby clamping the thin-walled tube to be processed in the radial direction.

[0010] The cooling assembly is mounted on the ejector pin and sprays coolant at an angle.

[0011] The separation component is located at the upper end of the machining lathe and is connected to the cooling component to separate waste material from coolant. The coolant is recycled by connecting the circulating component to the ejector pin.

[0012] Furthermore, the cooling assembly includes a nozzle sleeve, an inclined nozzle, and a flow hole. The nozzle sleeve is fixedly connected to the circumferential surface of the ejector rod, the flow hole is opened inside the ejector rod, and the inclined nozzle is opened inside the nozzle sleeve, with the opening of the inclined nozzle being inclined.

[0013] Furthermore, a machining drive base is slidably connected to the upper end of the machining lathe, and a machining drive motor is fixedly connected inside the machining drive base. The expansion assembly includes a threaded insertion groove, an expansion groove, an expansion fixing plate, a return spring, and an expansion threaded rod. The threaded insertion groove is opened inside the expansion fixing tube, and the expansion groove is opened on the inner circumferential wall of the threaded insertion groove. The expansion fixing plate is slidably connected inside the expansion groove. The return spring is fixedly connected to the inner side wall of the expansion groove and the side end of the expansion fixing plate. The expansion threaded rod is slidably connected inside the threaded insertion groove and contacts the inclined surface opened on one side of the expansion fixing plate.

[0014] Furthermore, a rotating motor is fixedly connected inside the drainage rotating tube, and a rotating rod is fixedly connected to the output end of the rotating motor. A drive groove is opened on one side end of the outwardly expanded threaded rod, and the rotating rod slides in the drive groove.

[0015] Furthermore, a flow-guiding sleeve is fixedly connected to one side of the processing drive base, a flow-guiding spiral plate is provided on the outer surface of the flow-guiding rotating tube, one side of the flow-guiding sleeve is located inside the cutting processing sleeve, and a flow-guiding inclined tube is opened in the lower inner wall of the flow-guiding sleeve and inside the processing drive base, and the other end of the flow-guiding inclined tube is connected to the separation component.

[0016] Furthermore, the separation assembly includes a centrifugal motor, a solid-liquid separation cylinder, and a liquid diversion cylinder. The centrifugal motor is fixedly connected to one end of the inclined diversion pipe, and the liquid diversion cylinder is connected to the output end of the centrifugal motor. The liquid diversion cylinder is fixedly connected to the outer surface of the threaded sleeve.

[0017] Furthermore, a threaded sleeve is fixedly connected to the output end of the centrifugal motor, and the solid-liquid separation cylinder is threadedly connected inside the solid-liquid separation cylinder.

[0018] Furthermore, the circulation assembly includes a collection tank, a circulating water pump, a circulation pipe, and a coolant injection cylinder. The collection tank is slidably connected to the upper end of the machining lathe. The circulating water pump is fixedly connected to one side of the collection tank. The coolant injection cylinder is sleeved on the outer surface of the ejector rod and communicates with the inclined spray pipe. A circulation pipe is fixedly connected to one side of the coolant injection cylinder and the output end of the circulating water pump.

[0019] Furthermore, a cutting blade is slidably connected to one end of the machining lathe via a motor drive.

[0020] Another aspect of the present invention provides a machining method for a turning apparatus for thin-walled pipes with external threads, comprising the following steps:

[0021] S1. First, the thin-walled tube to be processed is placed outside the outer expansion fixing tube. Then, the processing drive base moves to fix the thin-walled tube to be processed with the ejector pin. At the same time, the outer expansion component automatically expands under the drive, thereby achieving auxiliary clamping of the thin-walled tube.

[0022] S2. After clamping, start the machining drive motor. The motor output drives the flow-in rotating tube and the external expansion fixed tube to rotate synchronously and perform external thread cutting through the cutting blade. At the same time, the coolant flows into the nozzle sleeve from the flow hole inside the ejector rod and is precisely sprayed onto the cutting area at a 45° angle through the tilted nozzle, which plays the role of cooling, lubricating the tool and flushing away debris.

[0023] S3. During the cutting process, the mixture of metal chips and used coolant will fall into the drainage sleeve along the cutting sleeve and be transported to the separation component through the drainage inclined pipe. Centrifugal force is used to efficiently separate the coolant and metal chips. The chips are collected into the waste bin, while the coolant flows into the liquid drainage cylinder and eventually flows back to the collection bin. It is then supplied to the cooling component again through the circulation component for recycling, forming a closed-loop system.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. With this device, coolant is precisely sprayed into the cutting area through a spiral channel and an inclined nozzle, which improves heat dissipation and lubrication while cleaning up residual debris on the workpiece surface and treating it together with the coolant. This not only effectively reduces cutting temperature, reduces tool wear, and improves machining accuracy and surface quality, but also prevents secondary cutting and equipment blockage caused by debris accumulation.

[0026] 2. This device uses a pin rod in conjunction with an external expansion assembly to axially position and radially clamp thin-walled tubes, effectively preventing processing errors caused by tube deformation or offset during processing. It significantly improves the accuracy of external thread cutting and the surface quality of the workpiece, and is particularly suitable for processing thin-walled and easily deformable tube parts.

[0027] 3. This device integrates a flow-guiding sleeve, a solid-liquid separation component, and a coolant circulation system. It can efficiently separate used coolant from metal scrap and recycle the coolant after filtration, forming a closed-loop cycle. This not only reduces production costs but also minimizes environmental pollution and improves equipment operating efficiency and sustainable development capabilities. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a three-dimensional structural view of the present invention;

[0030] Figure 2 This is an exploded view of the structure in this invention;

[0031] Figure 3 This is a cross-sectional view of the structure in this invention;

[0032] Figure 4 This is an exploded cross-sectional view of the first structure in this invention;

[0033] Figure 5 This is an exploded cross-sectional view of the second structure in this invention;

[0034] Figure 6This is an exploded cross-sectional view of the third structure in this invention;

[0035] Figure 7 For the present invention Figure 4 Enlarged view of point A in the middle;

[0036] Figure 8 For the present invention Figure 5 Enlarged view of point B in the middle;

[0037] Figure 9 For the present invention Figure 5 Enlarged view of point C in the middle;

[0038] Figure 10 For the present invention Figure 6 Enlarged view of point D in the middle.

[0039] Figure 11 This is a cross-sectional view of a thin-walled pipe with external threads manufactured according to the present invention.

[0040] In the diagram: 1. Machining lathe; 2. Ejector pin; 3. Nozzle sleeve; 4. Inclined nozzle; 5. Flow hole; 6. Machining drive base; 7. Machining drive motor; 8. Outward expansion fixed tube; 9. Drainage rotating tube; 10. Drainage sleeve; 11. Drainage inclined tube; 12. Centrifugal motor; 13. Threaded sleeve; 14. Solid-liquid separation cylinder; 15. Liquid drainage cylinder; 16. Collection tank; 17. Circulating water pump; 18. Circulation pipe; 19. Coolant injection cylinder; 20. Machining base; 21. Machining sleeve; 22. Threaded insertion groove; 23. Outward expansion groove; 24. Outward expansion fixed plate; 25. Return spring; 26. Outward expansion threaded rod; 27. Drive rotating groove; 28. Rotary motor; 29. ​​Rotating rod; 30. Drainage spiral plate; 31. Ejector pin base; 32. Thin-walled tube to be machined. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1

[0043] Please see Figures 1-11 The present invention provides the following technical solutions:

[0044] A machining apparatus for thin-walled pipe fittings with external threads includes: a machining lathe 1, a pipe fitting guiding assembly, a cooling assembly, a circulation assembly, and a separation assembly.

[0045] The pipe guide assembly includes a machining base 20, a cutting sleeve 21, an ejector base 31, and an ejector rod 2. The machining base 20 is slidably connected to the upper end of the machining lathe 1, the cutting sleeve 21 is fixedly connected to the upper end of the machining base 20, the ejector base 31 is fixedly connected to the upper end of the machining lathe 1, and the cutting sleeve 21 is fixedly connected inside the ejector base 31.

[0046] like Figure 5 As shown, the thin-walled tube 32 to be processed is located inside the cutting sleeve 21, and one end of the thin-walled tube 32 is in contact with the ejector pin 2.

[0047] like Figure 7 As shown, the cooling assembly includes a nozzle sleeve 3, an inclined nozzle 4, and a flow hole 5. The nozzle sleeve 3 is fixedly connected to the circumferential surface of the ejector rod 2. The flow hole 5 is opened inside the ejector rod 2. The inclined nozzle 4 is opened inside the nozzle sleeve 3. The opening of the inclined nozzle 4 is inclined.

[0048] The circulation assembly is connected to the ejector pin 2 for recovering coolant;

[0049] The separation assembly is located at the upper end of the machining lathe 1 and is used to separate waste material from coolant.

[0050] In a specific embodiment of the present invention, the machining lathe 1 is provided with a guide rail to support and drive each machining component. The machining base 20 is slidably connected to the upper end of the machining lathe 1 and can move back and forth along the guide rail to facilitate adjustment of the machining position. The upper end of the cutting sleeve 21 is provided with a machining groove. The cutting blade passes through the upper machining groove to process the thin-walled tube 32 to be machined, performing external thread cutting. The debris and coolant flushed down by the coolant will flow into the drainage sleeve 10 along one side of the cutting sleeve 21 for collection. The ejector base 31 is fixedly connected to the front end of the machining lathe 1 for installing the ejector rod 2. The ejector rod 2 is inserted into the lathe spindle to ensure that its axis is coaxial with the spindle. The top end is provided with a contact surface for contacting one end of the thin-walled tube and achieving axial positioning. The ejector rod 2 is provided with a cooling component. The flow hole 5 is opened inside the ejector rod 2 to form a coolant delivery channel. The inclined nozzle 4 is opened in the nozzle sleeve. Inside the cylinder 3, the nozzle is inclined, with its direction forming an angle of 30°~45° with the axis of the ejector rod 2. The inclined nozzle 4 is located at the front end of the ejector head. The coolant reaches the cutting area directly through the inclined nozzle 4, effectively reducing the temperature and lubricating the tool, and flushing away the chips generated by the external thread cutting. The chips generated by cutting flow with the coolant into the guide sleeve 10 at the end of the pipe, and enter the separation component through the inclined guide pipe 11. The solid-liquid separation is completed by centrifugal force. The metal chips fall into the waste bin, and the coolant flows back to the collection box 16 for recycling. This device allows the coolant to be accurately sprayed to the cutting area through the spiral channel and the inclined nozzle, improving the heat dissipation and lubrication effect while cleaning the residual chips on the workpiece surface and treating them together with the coolant. This not only effectively reduces the cutting temperature, reduces tool wear, and improves machining accuracy and surface quality, but also prevents secondary cutting and equipment blockage caused by chip accumulation.

[0051] Please refer to the details. Figures 1-10 The upper end of the machining lathe 1 is slidably connected to a machining drive base 6. A machining drive motor 7 is fixedly connected inside the machining drive base 6. A flow-guiding rotating tube 9 is fixedly connected to the output end of the machining drive motor 7. An outward expansion fixed tube 8 is fixedly connected to the output end of the flow-guiding rotating tube 9. An outward expansion component is provided inside the outward expansion fixed tube 8.

[0052] In this embodiment: the machining drive base 6 is slidably connected to the upper guide rail of the machining lathe 1 and can move back and forth along the X-axis direction to facilitate position adjustment according to the length of the workpiece. The machining drive motor 7 is fixedly installed inside the machining drive base 6 and serves as a power source to drive the thin-walled tube 32 to be processed to rotate for processing. One end of the flow-guiding rotating tube 9 is fixedly connected to the output shaft of the machining drive motor 7, and the other end extends to the outward expansion fixing tube 8 to transmit the rotational power of the motor to the outward expansion assembly. It is fixedly connected to the output end of the flow-guiding rotating tube 9 and serves as the mounting carrier of the outward expansion assembly for fixing the thin-walled tube 32 to be processed.

[0053] Please refer to the details. Figures 1-10The expansion assembly includes a threaded insertion groove 22, an expansion groove 23, an expansion fixing plate 24, a return spring 25, and an expansion threaded rod 26. The threaded insertion groove 22 is opened inside the expansion fixing tube 8, the expansion groove 23 is opened on the inner circumference of the threaded insertion groove 22, the expansion fixing plate 24 is slidably connected to the expansion groove 23, the return spring 25 is fixedly connected to the inner side wall of the expansion groove 23 and the side end of the expansion fixing plate 24, and the expansion threaded rod 26 is slidably connected to the threaded insertion groove 22 and contacts the inclined surface opened on one side of the expansion fixing plate 24.

[0054] In this embodiment: the threaded insertion groove 22 is opened inside the outward expansion fixing tube 8, serving as a sliding channel for the outward expansion threaded rod 26. The outward expansion groove 23 is set on the inner circumference of the threaded insertion groove 22 to accommodate the outward expansion fixing plate 24. The outward expansion fixing plate 24 abuts against the inner wall of the thin-walled tube, forming a stable support and clamping on the inner wall of the thin-walled tube 32 to be processed. The outward expansion threaded rod 26 is slidably connected in the threaded insertion groove 22. When sliding, it contacts the inclined surface opened on one side of the outward expansion fixing plate 24 and expands outward by pressing the outward expansion fixing plate 24 through the inclined surface. At this time, the return spring 25 is stretched and elongated due to the sliding of the outward expansion fixing plate 24. After processing is completed, the outward expansion threaded rod 26 is pulled out of the threaded insertion groove 22, and the previously stretched return spring 25 rebounds, pulling the outward expansion fixing plate 24 inward to cancel the fixation of the thin-walled tube 32 to be processed.

[0055] Please refer to the details. Figures 1-10 A rotating motor 28 is fixedly connected inside the drainage rotating tube 9. A rotating rod 29 is fixedly connected to the output end of the rotating motor 28. A drive groove 27 is opened on one side end of the outwardly expanded threaded rod 26. The rotating rod 29 slides in the drive groove 27.

[0056] In this embodiment: the rotating motor 28 is embedded inside the drainage rotating tube 9 and its output end is fixed to the rotating rod 29, providing driving force for the expansion assembly. The rotating rod 29 is polygonal and can rotate with the motor in both forward and reverse directions. When the rotating motor 28 is started, it drives the rotating rod 29 to rotate. The rotating rod 29 rotates in the drive rotating groove 27. Since the outer surface of the expansion threaded rod 26 matches the thread of the threaded insertion groove 22, when the rotating rod 29 drives the expansion threaded rod 26 to rotate in the drive rotating groove 27, it generates a forward thrust on the expansion threaded rod 26. The thrust causes the expansion threaded rod 26 to slide outward along the threaded insertion groove 22, pushing the expansion fixing plate 24 outward, or to rotate in the opposite direction, generating a pull force on the expansion threaded rod 26 to pull it back in the opposite direction, causing the expansion threaded rod 26 to disengage from the expansion fixing plate 24.

[0057] Please refer to the details. Figures 1-10A flow-guiding sleeve 10 is fixedly connected to one side of the processing drive base 6. A flow-guiding spiral plate 30 is provided on the outer surface of the flow-guiding rotating tube 9. One side of the flow-guiding sleeve 10 is located inside the cutting processing sleeve 21. A flow-guiding inclined tube 11 is opened in the lower inner wall of the flow-guiding sleeve 10 and inside the processing drive base 6. The other end of the flow-guiding inclined tube 11 is connected to the separation component.

[0058] In this embodiment: the flow-guiding sleeve 10 extends into the cutting sleeve 21 to receive the mixture of coolant and metal chips flowing out from the cutting area. The flow-guiding inclined pipe 11 is arranged at an inclination to facilitate the smooth flow of liquid and metal chips by gravity. The other end of the flow-guiding inclined pipe 11 is connected to the separation component to transport the mixture of coolant and metal chips to the solid-liquid separation system for further processing. During the turning process, the coolant flows into the flow-guiding sleeve 10 through the cutting sleeve 21. The flow-guiding spiral plate 30 rotates synchronously with the flow-guiding rotating pipe 9, forming a spiral propulsion effect around it. The high-speed rotation of the sleeve forms a low-pressure zone in the annular gap to enhance the fluidity of the coolant and metal chips. The mixture finally enters the separation component to complete the separation of coolant and metal chips.

[0059] Please refer to the details. Figures 1-10 The separation assembly includes a centrifugal motor 12, a solid-liquid separation cylinder 14, and a liquid diversion cylinder 15. The centrifugal motor 12 is fixedly connected to one side of the diversion inclined pipe 11, the solid-liquid separation cylinder 14 is connected to the output end of the centrifugal motor 12, and the liquid diversion cylinder 15 is fixedly connected to the outer surface of the threaded sleeve 13.

[0060] In this embodiment: the centrifugal motor 12 is fixedly connected to one side of the inclined guide tube 11. The centrifugal motor 12 is a hollow structure and serves as the power source for generating centrifugal force by rotating the solid-liquid separation cylinder 14. The solid-liquid separation cylinder 14 has an overflow hole on its surface, which is connected to the output end of the centrifugal motor 12. When rotating at high speed, the mixture of coolant and debris is separated through the overflow hole. The liquid guide tube 15 is used to collect the separated coolant, prevent the coolant from splashing out of the device, and guide it back to the coolant circulation system.

[0061] Please refer to the details. Figures 1-10 The output end of the centrifugal motor 12 is fixedly connected to a threaded sleeve 13, and the solid-liquid separation cylinder 14 is threadedly connected to the threaded sleeve 13.

[0062] In this embodiment, the output end of the centrifugal motor 12 is directly fixedly connected to the threaded sleeve 13, ensuring that when the centrifugal motor 12 starts, it can drive the threaded sleeve 13 to rotate synchronously. When the solid-liquid separation cylinder 14 needs to be cleaned or replaced, it can be easily unscrewed from the threaded sleeve 13 to collect the debris for unified processing.

[0063] Please refer to the details. Figures 1-10The circulation assembly includes a collection tank 16, a circulating water pump 17, a circulation pipe 18, and a coolant injection cylinder 19. The collection tank 16 is slidably connected to the upper end of the machining lathe 1. The circulating water pump 17 is fixedly connected to one side of the collection tank 16. The coolant injection cylinder 19 is sleeved on the outer surface of the ejector rod 2 and connected to the inclined nozzle 4. The circulation pipe 18 is fixedly connected to one side of the coolant injection cylinder 19 and the output end of the circulating water pump 17.

[0064] In this embodiment: the collection tank 16 is located at the lower end of the liquid diversion tube 15 and is used to receive the coolant discharged from the solid-liquid separation component. The circulating water pump 17 is fixedly connected to one side of the collection tank 16 and serves as the power source for coolant transportation. One end of the circulation pipe 18 is connected to the output end of the circulating water pump 17, and the other end is connected to the coolant injection tube 19 to re-inject the coolant into the flow hole 5 to form a coolant transportation channel and complete the coolant circulation.

[0065] Please refer to the details. Figures 1-10 A cutting blade is slidably connected to one side of the machining lathe 1 via a motor drive, and the cutting blade is located at the upper end of the cutting sleeve 21.

[0066] In this embodiment, the cutting blade is set at the upper end of the cutting sleeve 21 for turning the outer wall of the thin-walled pipe. It is driven by a motor and can move the cutting blade precisely along the X-axis to achieve automatic tool feed and retraction.

[0067] like Figure 11 As shown, the thin-walled pipe with external threads produced by this embodiment has a wall thickness L of only 0.7 + (0.02 - 0.05) mm.

[0068] The working principle and usage process of this invention are as follows: First, the thin-walled tube 32 to be processed is sleeved on the outer expansion fixing tube 8. Then, the processing drive base 6 moves to fix the thin-walled tube 32 to be processed with the ejector rod 2. At the same time, the outer expansion component automatically expands under the drive, thereby achieving auxiliary clamping of the thin-walled tube. After clamping is completed, the processing drive motor 7 is started. The output end of the motor drives the drainage rotating tube 9 and the outer expansion fixing tube 8 to rotate synchronously to perform external thread cutting. At the same time, the coolant flows from the flow hole 5 inside the ejector rod 2 into the nozzle sleeve 3 and through the inclined nozzle 4. The coolant is precisely sprayed at a 45° angle onto the cutting area, serving to cool, lubricate the tool, and flush away debris. During the cutting process, the mixture of metal debris and used coolant falls along the cutting sleeve 21 into the guide sleeve 10, and is then transported to the separation component through the guide inclined pipe 11. Centrifugal force is used to efficiently separate the coolant from the metal debris. The debris is collected in the waste bin, while the coolant flows into the liquid guide cylinder 15 and eventually returns to the collection box 16, where it is re-supplyed to the cooling component for reuse, forming a closed-loop system.

[0069] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A machining apparatus for thin-walled tubes with external threads, used for machining thin-walled tubes (32) to be machined, comprising a machining lathe (1), characterized in that: It also includes pipe guiding assemblies, cooling assemblies, circulation assemblies, and separation assemblies; The tube guide assembly includes a cutting sleeve (21), an ejector base (31), and an ejector rod (2). The cutting sleeve (21) is mounted on a machining lathe (1). The ejector base (31) is fixedly connected to the upper end of the machining lathe (1). The ejector rod (2) is fixedly connected inside the ejector base (31). The thin-walled tube (32) to be processed is located inside the cutting sleeve (21). One end of the thin-walled tube (32) to be processed is in contact with the ejector rod (2). A cutting blade is mounted on the upper end of the cutting sleeve (21). A machining drive motor (7) is installed on a machining lathe at the other end of the thin-walled tube (32) to be processed. A flow-guiding rotating tube (9) is fixedly connected to the output end of the machining drive motor (7). An outward expansion fixing tube (8) is fixedly connected to the output end of the flow-guiding rotating tube (9). An outward expansion component is provided inside the outward expansion component. The outward expansion component expands outward along the radial direction of the thin-walled tube (32) to be processed, thereby clamping the thin-walled tube (32) to be processed in the radial direction. The cooling assembly is mounted on the ejector pin (2) and sprays coolant at an angle; The separation component is located at the upper end of the machining lathe (1) and is connected to the cooling component to separate waste material from coolant. The coolant is connected to the ejector rod (2) through the circulation component to recover the coolant. The cooling assembly includes a nozzle sleeve (3), an inclined nozzle (4), and a flow hole (5). The nozzle sleeve (3) is fixedly connected to the circumferential surface of the ejector rod (2). The flow hole (5) is opened inside the ejector rod (2). The inclined nozzle (4) is opened inside the nozzle sleeve (3). The opening of the inclined nozzle (4) is inclined. The upper end of the machining lathe (1) is slidably connected to a machining drive base (6), and a machining drive motor (7) is fixedly connected inside the machining drive base (6). A drainage sleeve (10) is fixedly connected to one side of the processing drive base (6). A drainage inclined tube (11) is provided in the lower inner wall of the drainage sleeve (10) and inside the processing drive base (6). The other end of the drainage inclined tube (11) is connected to the separation component. The separation assembly includes a centrifugal motor (12), a solid-liquid separation cylinder (14), and a liquid diversion cylinder (15). The centrifugal motor (12) is fixedly connected to one side of the diversion inclined pipe (11), and the threaded sleeve (13) is connected to the output end of the centrifugal motor (12). The liquid diversion cylinder (15) is fixedly connected to the outer surface of the threaded sleeve (13). The circulation assembly includes a collection box (16).

2. The turning apparatus for thin-walled pipe fittings with external threads according to claim 1, characterized in that: The expansion assembly includes a threaded insertion groove (22), an expansion groove (23), an expansion fixing plate (24), a return spring (25), and an expansion threaded rod (26). The threaded insertion groove (22) is opened inside the expansion fixing tube (8). The expansion groove (23) is opened on the inner circumference of the threaded insertion groove (22). The expansion fixing plate (24) is slidably connected inside the expansion groove (23). The return spring (25) is fixedly connected to the inner side wall of the expansion groove (23) and the side end of the expansion fixing plate (24). The expansion threaded rod (26) is slidably connected inside the threaded insertion groove (22) and contacts the inclined surface opened on one side of the expansion fixing plate (24).

3. The turning apparatus for thin-walled pipe fittings with external threads according to claim 2, characterized in that: A rotating motor (28) is fixedly connected inside the drainage rotating tube (9). A rotating rod (29) is fixedly connected to the output end of the rotating motor (28). A drive groove (27) is opened on one side end of the outwardly expanded threaded rod (26). The rotating rod (29) slides in the drive groove (27).

4. The turning apparatus for thin-walled pipe fittings with external threads according to claim 3, characterized in that: The outer surface of the drainage rotating tube (9) is provided with a drainage spiral plate (30), and one end of the drainage sleeve (10) is located inside the cutting sleeve (21).

5. The turning apparatus for thin-walled pipe fittings with external threads according to claim 1, characterized in that: The output end of the centrifugal motor (12) is fixedly connected to a threaded sleeve (13), and the solid-liquid separation cylinder (14) is threadedly connected inside the threaded sleeve (13).

6. The turning apparatus for thin-walled pipe fittings with external threads according to claim 5, characterized in that: The circulation assembly also includes a circulating water pump (17), a circulation pipe (18), and a coolant injection cylinder (19). The collection box (16) is slidably connected to the upper end of the machining lathe (1). The circulating water pump (17) is fixedly connected to one side of the collection box (16). The coolant injection cylinder (19) is sleeved on the outer surface of the ejector rod (2) and connected to the inclined nozzle (4). The circulation pipe (18) is fixedly connected to one side of the coolant injection cylinder (19) and the output end of the circulating water pump (17).

7. The turning apparatus for thin-walled pipe fittings with external threads according to claim 6, characterized in that: One end of the machining lathe (1) is slidably connected to a cutting blade via a motor drive.

8. The machining method of a turning device for thin-walled pipe fittings with external threads according to claim 1, characterized in that: Includes the following steps: S1. First, the thin-walled tube (32) to be processed is placed outside the outer expansion fixing tube (8). Then, the processing drive base (6) moves to fix the thin-walled tube (32) to be processed with the ejector rod (2). At the same time, the outer expansion component automatically expands under the drive, thereby realizing the auxiliary clamping of the thin-walled tube. S2. After clamping is completed, start the machining drive motor (7). The output end of the motor drives the flow rotating tube (9) and the external expansion fixed tube (8) to rotate synchronously and perform external thread cutting through the cutting blade. At the same time, the coolant flows into the nozzle sleeve (3) from the flow hole (5) inside the ejector rod (2) and is precisely sprayed to the cutting area at a 45° angle through the inclined nozzle (4). S3. During the cutting process, the mixture of metal chips and used coolant will fall into the drainage sleeve (10) along the cutting sleeve (21) and be transported to the separation component through the drainage inclined pipe (11). The coolant and metal chips are efficiently separated by centrifugal force. The chips are collected into the waste bin, while the coolant flows into the liquid drainage cylinder and eventually flows back to the collection box (16). It is then supplied to the cooling component again through the circulation component for recycling, forming a closed-loop system.

Images