A polytetrafluoroethylene pipe end connecting groove broaching apparatus

Abstract

The present application relates to the technical field of pipe drawing, and particularly relates to a polytetrafluoroethylene pipe end connecting groove drawing equipment, which comprises a device main body, an installation base is installed in the inside of the device main body, a steel lining pipe is arranged on the installation base, a broach for machining the steel lining pipe is further arranged at the upper end of the steel lining pipe, a warning mechanism is arranged in the device main body, the warning mechanism comprises two arc-shaped plates and two groups of sheet mechanisms, when the broach is out of balance or the feeding stroke is too long, the warning mechanism is in contact with the sheet mechanism, the machining abnormality is directly and intuitively prompted through the double modes of vibration sound and color change caused by the separation of the two layers of sheets, the pipe mouth deformation and tearing risk can be found in time, and the mechanism can be reset and reused again by relying on elasticity after being impacted; the sheet one made of polyurethane material directly bears the impact of the broach, the sheet two made of metal forms buffering protection, the service life of the warning mechanism is prolonged, the workpiece scrapping and raw material waste are reduced, and the machining efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of pipe broaching technology, and in particular to a broaching machine for end connection grooves of polytetrafluoroethylene pipe fittings. Background Technology

[0002] This PTFE (polytetrafluoroethylene) pipe fitting end-connecting groove broaching equipment is used in the production of steel-lined pipe fittings. The equipment only broaches the steel pipe fitting base. After broaching, a PTFE liner is then fitted inside the steel pipe fitting without cutting the PTFE material. The equipment includes a machine bed, workpiece fixture, broach drive mechanism, and broach assembly. The workpiece fixture clamps and positions the steel pipe fitting, constraining radial offset and circumferential rotation, and determining the axial machining position at the pipe end. The broach drive mechanism drives the broach assembly linearly, and the broach teeth pass through the inner hole of the pipe fitting to machine a connecting groove for assembly on the inner wall of the steel pipe end. This allows for adaptation to different pipe specifications, ensuring uniform groove dimensions. After machining, the steel pipe fitting is transferred to the next station where the PTFE liner is fitted. The liner and connecting groove mate to achieve axial restraint, preventing... The inner lining may shift and fall off. However, in the broaching process of thin-walled steel-lined pipe fittings, existing broaching equipment only relies on basic clamping to fix the pipe body without internal auxiliary constraint structures. When the broach feeds, it will generate radial force on the inner wall of the pipe fitting. During the operation of the equipment, the broach is prone to slight swaying and feed stroke deviation. Under such conditions, the pipe end of the thin-walled pipe fitting is prone to elastic deformation or even tearing damage, resulting in deviation of the dimensions and substandard accuracy of the formed connecting groove. This makes it impossible to match the subsequent polytetrafluoroethylene lining assembly process requirements. At the same time, such processing defects cannot be detected in real time during processing and can only be found after the workpiece is disassembled. A large number of unqualified workpieces have to be scrapped, which not only wastes steel raw materials but also significantly reduces the overall production and processing efficiency of steel-lined anti-corrosion pipe fittings.

[0003] Therefore, this invention proposes a tool for broaching the end connection groove of polytetrafluoroethylene pipe fittings. Summary of the Invention

[0004] The technical problem to be solved: In the broaching process of thin-walled steel-lined pipe fittings, existing broaching equipment relies solely on basic clamping to fix the pipe fitting base without internal auxiliary constraint structures. During the broaching operation, radial forces are generated on the inner wall of the pipe fitting. During equipment operation, the broach is prone to slight swaying and feed stroke deviation. Under these conditions, the pipe end of the thin-walled pipe fitting is prone to elastic deformation or even tearing damage, resulting in deviations in the dimensions and accuracy of the formed connecting groove, which cannot meet the requirements of the subsequent polytetrafluoroethylene lining assembly process. At the same time, such processing defects cannot be detected in real time during processing and can only be found after the workpiece is disassembled. A large number of unqualified workpieces have to be scrapped, which not only wastes steel raw materials but also significantly reduces the overall production and processing efficiency of steel-lined anti-corrosion pipe fittings.

[0005] To address the shortcomings of existing technologies, this invention provides a broaching and cutting machine for end connection grooves of polytetrafluoroethylene (PTFE) pipe fittings, thereby solving the technical problems mentioned in the background art.

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

[0007] A broaching processing device for end connection grooves of polytetrafluoroethylene pipe fittings includes a main body, an installation base installed inside the main body, a steel-lined pipe fitting mounted on the installation base, a broach for processing the steel-lined pipe fitting at its upper end, and an early warning mechanism installed inside the main body. The early warning mechanism includes two arc-shaped plates and two sets of thin-plate mechanisms. The two arc-shaped plates are located at both ends of the installation base, and the thin-plate mechanisms are evenly distributed on the opposite side of the two arc-shaped plates.

[0008] The sheet structure includes sheet one and sheet two, which are bonded together in the same position. Sheet one is a transparent polyurethane sheet that is entirely doped with blue masterbatch, and sheet two is a metal sheet that has been anodized to form a red substrate.

[0009] In one possible implementation, L-shaped support frames are provided at both ends of the mounting base, both L-shaped support frames are fixedly connected to the inner wall of the main body of the device, and a fixing plate is fixedly connected to the upper end of both L-shaped support frames.

[0010] In one possible implementation, threaded rods are provided between the fixed plate and the L-shaped support frame on the same side, each threaded rod being rotatably connected to the corresponding fixed plate, and the other side of each threaded rod being rotatably connected to the L-shaped support frame.

[0011] In one possible implementation, each threaded rod has a slide bar at both ends, each slide bar is fixedly connected to a corresponding fixed plate, the other end of each slide bar is fixedly connected to a corresponding L-shaped support frame, and a U-shaped plate is threaded onto the end of each threaded rod.

[0012] In one possible implementation, each U-shaped plate is fixedly connected to a corresponding arc-shaped plate, and each of the two L-shaped support frames has a knob at one of its opposite ends. The opposite ends of the two knobs pass through the L-shaped support frames and are fixedly connected to the corresponding threaded rods.

[0013] In one possible implementation, a U-shaped plate is provided at the upper end of each of the two L-shaped support frames, a lifting plate is provided inside each of the two U-shaped plates, a lifting column is fixedly connected to the upper surface of each of the two lifting plates, the upper end of each lifting column passes through the U-shaped plate, and a limit plate is fixedly connected to the upper surface of each lifting column.

[0014] In one possible implementation, springs are fixedly connected to the lower surfaces of both limiting plates, and the lower surface of each spring is fixedly connected to the corresponding U-shaped plate. An elliptical plate is provided inside each of the two U-shaped plates.

[0015] In one possible implementation, a rotating column is fixedly connected to the center point of each elliptical plate, and the opposite sides of the two rotating columns are rotatably connected to the inner wall of the corresponding U-shaped plate. A motor is fixedly connected to the opposite sides of the two U-shaped plates, and the output port of each motor passes through the U-shaped plate and is fixedly connected to the corresponding rotating column.

[0016] In one possible implementation, a rotating fan blade is fixedly connected to the side surface of each rotating column, and a magnetic suction plate is fixedly connected to the opposite side of the two lifting plates. A rectangular groove is opened at the center point of each magnetic suction plate, and a cleaning brush is set in each rectangular groove. The side surfaces of the two cleaning brushes are fixedly connected to the magnetic suction plate.

[0017] In one possible implementation, the upper ends of both L-shaped support frames are provided with sliding grooves, and each groove has a slider slidably connected inside. The lower surfaces of the two sliders are fixedly connected to the upper surfaces of the corresponding U-shaped plate one, and the upper surface of each slider is fixedly connected to the lower surface of the corresponding U-shaped plate two.

[0018] Beneficial effects compared to existing technologies:

[0019] 1. In this solution, an early warning mechanism consisting of a dual-color thin-film structure is set up. When the broach wobbles or the feed overtravel malfunctions and contacts the thin-film mechanism, the abnormality is visually indicated by both vibration and sound and the color change caused by the separation of the two thin films. This can promptly detect the risk of nozzle deformation and tearing. After the mechanism is retracted due to impact, it can be reset and reused due to its elasticity. The first thin film made of polyurethane directly bears the impact of the broach and forms a buffer protection for the second metal thin film, extending the service life of the early warning mechanism, reducing workpiece scrap and raw material waste, and improving processing efficiency.

[0020] 2. In this solution, the matching knob, threaded rod, and slide rod adjustment components can adjust the distance between the arc plate warning mechanisms on both sides according to the diameter of the steel-lined pipe fitting, accurately control the safety gap between the warning mechanism and the pull cutter and pipe fitting opening, which can not only adapt to the processing of multiple specifications of pipe fittings, but also avoid the problems of missed warnings due to faults and false triggering during normal processing, thus improving the equipment's adaptability and the stability of the warning operation.

[0021] 3. In this solution, an elliptical plate driven by a motor and springs are used to achieve the reciprocating lifting motion of the cleaning brush. The cleaning brush scrapes away residual metal chips from the gaps between the broach teeth. The rotating fan blades generate airflow to disperse the falling chips. The magnetic plate then adsorbs and collects the scattered metal chips. This multi-action process removes impurities from the broach teeth, prevents chips from scratching the workpiece surface, ensures the machining accuracy of the connecting groove, and facilitates long-term continuous and stable operation of the equipment. Attached Figure Description

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the broach structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the L-shaped support frame structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the U-shaped plate structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the arc-shaped plate structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the magnetic chuck structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the cleaning brush structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the elliptical plate structure of the present invention.

[0031] Legend: 11. Main body of the device; 12. Pull knife; 13. Mounting base; 14. Steel-lined pipe fitting; 15. L-shaped support frame; 16. Limiting plate; 17. Lifting column; 18. Spring; 19. Rotating column; 20. Magnetic suction plate; 21. Cleaning brush; 22. Knob; 23. U-shaped plate one; 24. Motor; 25. U-shaped plate two; 26. Rotating fan blade; 27. Elliptical plate; 28. Lifting plate; 29. ​​Arc plate; 30. Fixing plate; 31. Slide groove; 32. Slide rod; 33. Sliding block; 34. Threaded rod; 35. Thin plate one; 36. Thin plate two; 37. Rectangular groove. Detailed Implementation

[0032] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can also be implemented in various different forms, and therefore the present invention is not limited to the embodiments described below. In addition, for the purpose of more clearly describing the present invention, parts not connected to the invention will be omitted from the drawings.

[0033] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0034] Example:

[0035] Please refer to Figure 1 and Figure 8 As shown, this embodiment introduces a broaching machine for the end connection groove of polytetrafluoroethylene (PTFE) pipe fittings. This machine is used in the production of steel-lined pipe fittings 14. It only performs broaching on the steel pipe fitting substrate. After processing, a PTFE liner is installed inside the steel pipe fitting without cutting the PTFE. The machine includes a main body 11, inside which is installed a mounting base 13. The steel-lined pipe fitting 14 is mounted on the mounting base 13. A broach 12 for processing the steel-lined pipe fitting 14 is also provided at the upper end of the steel-lined pipe fitting 14. When the operator needs to broach the steel-lined pipe fitting 14... During the process, the workers fix the steel-lined pipe fitting 14 onto the mounting base 13, and then control the broach 12 to descend and broach the steel-lined pipe fitting 14. The equipment can stably process the assembly connection groove on the inner wall of the end of the steel-lined pipe fitting 14, ensuring the forming accuracy of the connection groove and the good consistency of the groove size, which facilitates the subsequent process of assembling the polytetrafluoroethylene liner. The connection groove forms an axial limit on the liner, reducing the possibility of the polytetrafluoroethylene liner shifting or falling off during use, and improving the assembly reliability of the steel-lined anti-corrosion pipe fitting. The overall clamping operation is simple and can complete the batch broaching processing of steel pipe fittings, which is suitable for the production and use needs of chemical anti-corrosion pipe fittings.

[0036] In the existing equipment, during the broaching operation on the steel base end of the steel-lined pipe fitting 14, the steel pipe fitting has a relatively thin wall thickness. This steel pipe fitting serves as the outer base of the steel-lined pipe fitting 14, and its inner side requires a polytetrafluoroethylene (PTFE) liner. To control the overall weight of the pipeline and to allow sufficient internal flow space, thick-walled pipe materials cannot be used. Therefore, the pipe wall thickness is designed to be relatively small. When the broach 12 feeds downwards to perform groove machining, the broach teeth apply a radial force from the inside of the pipe fitting outwards. The steel-lined pipe fitting 14 is only fixed externally by the base clamping, lacking a corresponding internal support and constraint structure. If the broach 12 slightly wobbles during machining, or if there is a deviation in the feed control, the pipe end of the thin-walled pipe fitting is easily deformed, and in severe cases, the pipe end may tear and be damaged. If the pipe fitting deforms or tears, the dimensions of the formed connecting groove will deviate, failing to meet the assembly requirements of the subsequent polytetrafluoroethylene liner. The workpiece must be scrapped, and the fault is difficult to identify in real time, only becoming apparent after the workpiece is removed, resulting in waste of raw materials and reduced production efficiency of the steel-lined pipe fitting 14. To avoid these problems, an early warning mechanism is installed inside the main body 11 of the device. The early warning mechanism includes two arc-shaped plates 29 and two sets of thin-plate mechanisms. The two arc-shaped plates 29 are located at both ends of the mounting base 13. The thin-plate mechanisms are evenly distributed on the opposite side of the two arc-shaped plates 29. The thin-plate mechanisms include thin sheet one 35 and thin sheet two 36, which are attached together in the same position. Thin sheet one 35 is a transparent polyurethane sheet entirely mixed with blue masterbatch. Sheet 2 (36) is a thin metal sheet with a red substrate formed by anodizing. Sheet 1 (35) and sheet 2 (36) are clamped and fixed only at their roots, with no adhesion at the free ends. Normally, they remain in contact due to the elasticity of the materials. Sheet 1 (35) is positioned on the side of sheet 2 (36) closest to the broach 12. When the broach 12 moves downwards for broaching, there is sufficient safety clearance between the outer circumference of the broach 12 and the sheet mechanism, preventing the broach 12 from touching the sheet mechanism. At this time, sheet 1 (35) and sheet 2 (36) are tightly bonded together by their own material elasticity. External light first passes through the blue-tinged transparent sheet 1 (35) and then reflects the red of sheet 2 (36). After the two colors overlap, the operator sees a mixed purple color, allowing the equipment to normally perform broaching on the steel-lined pipe fitting 14. During the cutting operation, if the broach 12 deviates to the side or the downward feed distance exceeds the set stroke, the broach 12 will first collide with sheet 35. After being impacted, the sheet mechanism bends as a whole. Sheet 36, being a thin metal part, is forced to undergo elastic deformation. The rapid bending and shaking of the metal sheet produces a deformation vibration sound, which the operator can detect as an abnormality. At the same time, the bending of the sheet mechanism will separate the free ends of sheet 35 and sheet 36, creating a gap between the two layers. The color superposition effect will no longer occur, and the operator can directly see the original red color of sheet 36. The color change further confirms the fault. When the broach 12 leaves the sheet mechanism, the impact force disappears, and the sheet mechanism returns to its original shape due to the elastic rebound of the material itself.Thin sheet 35 and thin sheet 36 are re-attached, and the mechanism can be used for warning again. Thin sheet 35 is made of polyurethane, which is soft and tear-resistant. During processing, thin sheet 35 directly contacts the broach 12. Relying on the buffering and isolation effect of thin sheet 35, the cutting teeth on the broach 12 will not directly rub and scratch thin sheet 36, thus protecting thin sheet 36.

[0037] The mounting base 13 has L-shaped support frames 15 at both ends. Both L-shaped support frames 15 are fixedly connected to the inner wall of the main body 11. A fixing plate 30 is fixedly connected to the upper end of each L-shaped support frame 15. A threaded rod 34 is provided between the fixing plate 30 and the L-shaped support frame 15 on the same side. Each threaded rod 34 is rotatably connected to its corresponding fixing plate 30, and the other side of each threaded rod 34 is rotatably connected to the L-shaped support frame 15. Each threaded rod 34 has a sliding rod 32 at both ends, and each sliding rod 32 is fixedly connected to its corresponding fixing plate 30. The other end of each sliding rod 32 is fixedly connected to its corresponding L-shaped support frame 15. A U-shaped plate 23 is threadedly sleeved at the end of each threaded rod 34, and each U-shaped plate 23 is fixedly connected to its corresponding arc-shaped plate 29. A knob 22 is provided at the opposite ends of the two L-shaped support frames 15. The opposite ends of the two knobs 22 pass through the L-shaped support frame 15 and... The corresponding threaded rod 34 is fixedly connected. The operator can rotate the threaded rod 34 by rotating the knob 22. The slide bar 32 plays a limiting and guiding role for the threaded rod 34, ensuring that the threaded rod 34 will not deviate during rotation, making the operation more stable. When the threaded rod 34 rotates, it uses its own thread transmission characteristics to drive the threaded U-shaped plate 23 to move smoothly along the axial direction of the threaded rod 34, thereby driving the arc plate 29 fixed with the U-shaped plate 23 to move synchronously, thereby realizing the adjustment of the distance between the two arc plates 29. Through this adjustment structure, the safety distance between the double-layer warning pawl mechanism and the broach 12 and the pipe opening can be precisely adjusted according to the pipe diameter of different specifications of steel-lined pipe fittings 14. It can not only adapt to the broaching processing needs of various pipe diameters, but also ensure the triggering accuracy of the warning mechanism, avoiding the problem that the fault cannot be warned in time due to the excessive distance, and the problem that the normal processing is falsely triggered due to the excessive distance, which greatly improves the adaptability and warning stability of the equipment.

[0038] Metal chips generated during machining can easily remain between the teeth of the broach 12. These residual chips can scratch the machined surface of the workpiece, causing a decrease in the machining accuracy of the connecting groove. Therefore, U-shaped plates 25 are provided at the upper ends of the two L-shaped support frames 15. Lifting plates 28 are provided inside the two U-shaped plates 25. Lifting columns 17 are fixedly connected to the upper surfaces of the two lifting plates 28. The upper end of each lifting column 17 passes through the U-shaped plate 25, and a limiting plate 16 is fixedly connected to the upper surface of each lifting column 17. Springs 18 are fixedly connected to the lower surfaces of the two limiting plates 16. The lower surface of each spring 18 is connected to the corresponding U-shaped plate 25. Plate 25 is fixedly connected. Each of the two U-shaped plates 25 contains an elliptical plate 27. A rotating column 19 is fixedly connected to the center point of each elliptical plate 27. The opposing sides of the two rotating columns 19 are rotatably connected to the inner wall of the corresponding U-shaped plate 25. A motor 24 is fixedly connected to the opposing sides of each U-shaped plate 25. The output port of each motor 24 passes through the U-shaped plate 25 and is fixedly connected to the corresponding rotating column 19. A rotating fan blade 26 is fixedly connected to the side surface of each rotating column 19. Magnetic plates 20 are fixedly connected to the opposite sides of the two lifting plates 28. A magnetic suction plate 20 is opened at the center point of each magnetic suction plate 20. There are rectangular slots 37, and each rectangular slot 37 is equipped with a cleaning brush 21. The side surfaces of the two cleaning brushes 21 are fixedly connected to the magnetic plate 20. When the motor 24 is working, it drives the rotating column 19 and the elliptical plate 27 to rotate synchronously. The elliptical plate 27 rotates circumferentially with the rotating column 19. The contour surface of the elliptical plate 27 continuously abuts against the lifting plate 28, pushing the lifting plate 28 to move up and down reciprocally. While the lifting plate 28 is moving, it compresses or releases the spring 18. The spring 18 provides a reset force for the lifting plate 28, ensuring that the lifting plate 28 can continuously move up and down following the contour of the elliptical plate 27. The lifting plate 28 drives the magnetic plate 20. The suction plate 20 moves up and down synchronously, and the cleaning brush 21, which is fixed inside the rectangular groove 37 of the magnetic suction plate 20, moves up and down and slides close to the outer surface of the broach 12 to scrape off the metal chips attached to the surface of the broach teeth. At the same time, the rotating fan blade 26 rotates synchronously with the rotating column 19 and generates airflow to blow up and disperse the cleaned and dislodged fine metal chips, preventing the chips from accumulating and sticking together. The magnetic suction plate 20 with magnetic attraction properties can adsorb and capture suspended and scattered metal chips, effectively collect processing chips, thoroughly clean impurities around the broach 12, prevent metal chip residue from affecting broaching accuracy, and ensure long-term stable processing of the equipment.

[0039] To ensure that the cleaning brush 21 remains in contact with the surface of the broach 12, grooves 31 are provided through the upper ends of the two L-shaped support frames 15. Each groove 31 has a sliding block 33 slidably connected inside. The lower surfaces of the two sliding blocks 33 are fixedly connected to the upper surfaces of the corresponding U-shaped plates 1 and 23, respectively. The upper surface of each sliding block 33 is fixedly connected to the lower surface of the corresponding U-shaped plate 25. The grooves 31 and sliding blocks 33 cooperate to allow the U-shaped plate 25 to adjust its lateral position synchronously with the U-shaped plate 1. Adjusting the spacing of the arc plates 29 simultaneously drives the cleaning brush 21 to move synchronously, ensuring that the relative positions of the cleaning brush 21 and the broach 12 remain matched. Regardless of the diameter of the steel-lined pipe fitting 14 being processed, the cleaning brush 21 can always remain in contact with the surface of the broach 12, preventing the cleaning brush 21 from shifting or detaching from the broach 12 and causing cleaning failure. No secondary adjustment of the cleaning mechanism is required, simplifying equipment operation, ensuring stable chip removal and cleaning of the broach 12, and guaranteeing the cleaning effect of the broach 12.

[0040] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A broaching machine for end joint grooves of polytetrafluoroethylene (PTFE) pipe fittings, comprising a main body (11), wherein a mounting base (13) is installed inside the main body (11), a steel-lined pipe fitting (14) is provided on the mounting base (13), and a broach (12) for processing the steel-lined pipe fitting (14) is also provided at the upper end of the steel-lined pipe fitting (14), characterized in that, The device body (11) is equipped with an early warning mechanism, which includes two arc plates (29) and two sets of thin plate mechanisms. The two arc plates (29) are located at both ends of the mounting base (13), and the thin plate mechanisms are evenly distributed on the opposite side of the two arc plates (29). The sheet structure includes sheet one (35) and sheet two (36), which are located in the same position and are bonded together. Sheet one (35) is a transparent polyurethane sheet with blue masterbatch, and sheet two (36) is a metal sheet with a red substrate formed by anodizing.

2. The polytetrafluoroethylene pipe fitting end connection groove broaching processing equipment as described in claim 1, characterized in that, The mounting base (13) is provided with L-shaped support frames (15) at both ends. Both L-shaped support frames (15) are fixedly connected to the inner wall of the main body (11) of the device. Both L-shaped support frames (15) are fixedly connected to the upper end of the two L-shaped support frames (15) with fixing plates (30).

3. The polytetrafluoroethylene pipe fitting end connection groove broaching processing equipment as described in claim 2, characterized in that, A threaded rod (34) is provided between the fixed plate (30) and the L-shaped support frame (15) on the same side. Each threaded rod (34) is rotatably connected to the corresponding fixed plate (30), and the other side of each threaded rod (34) is rotatably connected to the L-shaped support frame (15).

4. The polytetrafluoroethylene pipe fitting end connection groove broaching processing equipment as described in claim 3, characterized in that, Each threaded rod (34) has a slide rod (32) at both ends. Each slide rod (32) is fixedly connected to the corresponding fixed plate (30). The other end of each slide rod (32) is fixedly connected to the corresponding L-shaped support frame (15). Each threaded rod (34) has a U-shaped plate (23) threadedly sleeved at its end.

5. The polytetrafluoroethylene pipe fitting end connection groove broaching processing equipment as described in claim 4, characterized in that, Each U-shaped plate (23) is fixedly connected to the corresponding arc plate (29). The two L-shaped support frames (15) are provided with knobs (22) at opposite ends. The opposite ends of the two knobs (22) pass through the L-shaped support frame (15) and are fixedly connected to the corresponding threaded rod (34).

6. The polytetrafluoroethylene pipe fitting end connection groove broaching processing equipment as described in claim 2, characterized in that, The upper ends of the two L-shaped support frames (15) are provided with U-shaped plates (25), and the interior of the two U-shaped plates (25) is provided with lifting plates (28). The upper surfaces of the two lifting plates (28) are fixedly connected with lifting columns (17). The upper end of each lifting column (17) passes through the U-shaped plate (25), and the upper surface of each lifting column (17) is fixedly connected with a limit plate (16).

7. The polytetrafluoroethylene pipe fitting end connection groove broaching processing equipment as described in claim 6, characterized in that, The lower surfaces of the two limiting discs (16) are fixedly connected with springs (18), and the lower surface of each spring (18) is fixedly connected with the corresponding U-shaped plate (25). An elliptical plate (27) is provided inside each of the two U-shaped plates (25).

8. The polytetrafluoroethylene pipe fitting end connection groove broaching processing equipment as described in claim 7, characterized in that, Each of the elliptical plates (27) has a rotating column (19) fixedly connected to its center point. The opposite sides of the two rotating columns (19) are rotatably connected to the inner wall of the corresponding U-shaped plate (25). The opposite sides of the two U-shaped plates (25) are fixedly connected to a motor (24). The output port of each motor (24) passes through the U-shaped plate (25) and is fixedly connected to the corresponding rotating column (19).

9. The polytetrafluoroethylene pipe fitting end connection groove broaching processing equipment as described in claim 8, characterized in that, Each of the rotating columns (19) has a rotating fan blade (26) fixedly connected to its side surface. The two lifting plates (28) have magnetic plates (20) fixedly connected to their opposite sides. Each magnetic plate (20) has a rectangular groove (37) at its center point. Each rectangular groove (37) has a cleaning brush (21) installed in it. The side surfaces of the two cleaning brushes (21) are fixedly connected to the magnetic plates (20).

10. The polytetrafluoroethylene pipe fitting end connection groove broaching processing equipment as described in claim 9, characterized in that, The upper ends of the two L-shaped support frames (15) are provided with sliding grooves (31), and each sliding groove (31) is slidably connected to a slider (33). The lower surfaces of the two sliders (33) are fixedly connected to the upper surfaces of the corresponding U-shaped plate one (23), and the upper surfaces of each slider (33) are fixedly connected to the lower surfaces of the corresponding U-shaped plate two (25).

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