A milling device for S-bend inner groove

Abstract

The application belongs to the technical field of lathe machining, in particular to a milling equipment for the inner groove of an S elbow, comprising a milling support, a calibration equipment is arranged in the middle of the milling support, and a transfer equipment is arranged at the bottom of the milling support; the calibration equipment comprises an upper cover shell, a compression gasket is fixedly connected to the inner wall of the upper cover shell, and a lower cover shell is fixedly connected to the bottom of the compression gasket. The calibration equipment is arranged at the shaft center, when the S pipe can smoothly pass through the adaptive cutting groove, it represents that the S pipe is automatically calibrated to the shaft center position, and the pipe body will not be offset afterwards, the cutting tool head can realize the machining work, by converting the calibration work of the pipe body into the clear indication that the pipe body can pass through the adaptive cutting groove, it is ensured that the S pipe passing through the adaptive cutting groove can be stably milled at the shaft center position, thereby saving the time for accurately calibrating the S pipe, and ensuring that the final position of the pipe body can perform the milling work of the next tool without deviation.

Description

Technical Field

[0001] This invention belongs to the field of lathe machining technology, specifically a milling device for the inner groove of an S-bend. Background Technology

[0002] In some complex environments, S-bend connectors are needed to connect one end of the S-bend to a pipe and the other end to another pipe, so that two pipes of different heights can be connected together with only one connector. Existing S-bend connectors are mass-produced using molds. The molds are solid structures, and then the molds are fixed on a CNC machine tool and machined with cutting tools to machine holes of suitable diameter inside the S-bend connector.

[0003] When machining S-bend pipe fittings, high cutting accuracy of the cutting tool is required. However, when processing a large number of S-bend pipe fittings, each fitting may gradually deviate during fixed operations. Therefore, high-precision adjustments are required after each fitting installation, which consumes a lot of time and reduces processing efficiency. Therefore, improvements are needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this invention to solve its technical problems is: a milling device for the inner groove of an S-bend, comprising a milling support, a calibration device provided in the middle of the milling support, and a transfer device provided at the bottom of the milling support;

[0005] The calibration device includes an upper cover, with a compression washer fixedly connected to the inner wall of the upper cover. A lower cover is fixedly connected to the bottom of the compression washer. The upper cover and the lower cover are connected and combined to form a circular disc through the compression washer. The top of the inner cavity of the upper cover has an adapter groove. The adapter groove is S-shaped to fit the processed tube, but the two ends are significantly expanded, leaving only the middle bending area to fit the S-shaped tube. The adapter groove extends to the outside of the lower cover. The S-tube can pass through the calibration device through the adapter groove when it is laid flat. A pressure-sensing end is symmetrically fixed at the top center of the inner wall of the upper cover. A plug wire is fixedly connected to the top of the pressure-sensing end. An alarm is fixedly connected to the end of the plug wire away from the pressure-sensing end.

[0006] The milling support includes a docking plate. A guide groove is provided on the side of the inner cavity of the docking plate near the calibration equipment. An arc-shaped guide rail is fixedly connected to the upper surface of the docking plate near the pressure-sensing end. A protective rotating shell is rotatably connected to the top of the inner wall of the arc-shaped guide rail. The docking plates on both sides are combined with the disc of the calibration equipment through the guide groove. The docking plates on both sides can be perfectly docked to form a long plate, and the arc-shaped guide rails on both sides are also docked to form an arc-shaped rotating rail.

[0007] Furthermore, the outer surface of the upper cover is rotatably connected to the inner cavity of the docking plate through a guide groove, the outer surface of the lower cover is mutually pressed against the inner cavity of the docking plate through a guide groove, the end of the plug wire away from the pressure sensing end extends into the interior of the protective cover through a through-hole, and the outer surface of the alarm is rotatably connected to the inner wall of the arc-shaped guide rail.

[0008] Furthermore, a displacement groove is provided on the side of the inner cavity of the docking tray away from the arc-shaped guide rail, and a vertical push plate is provided on the inner wall of the displacement groove. A control motor is fixedly connected to the top of the vertical push plate, and a cutting head is fixedly connected to the top of the output shaft of the control motor. A control slide plate is fixedly connected to the bottom of the vertical push plate. The control slide plate can drive the vertical push plate to slide along the displacement groove, thereby adjusting the cutting point of the cutting head. The upper surface of the control slide plate is slidably connected to the lower surface of the docking tray through rollers. The bottom end of the vertical push plate extends into the interior of the control slide plate, and the outer surface of the vertical push plate is slidably connected to the inner cavity of the docking tray through the displacement groove. Both the upper and lower ends of the vertical push plate extend to the outside of the displacement groove. There are two docking trays and two protective rotating shells. The lower surface of the docking tray is fixedly connected to the ground. There are two pressure-sensing ends, and the bottom ends of the pressure-sensing ends are pressed against the inner wall of the lower cover shell.

[0009] Furthermore, the transfer device includes a fixed chassis, a control turntable rotatably connected to the center of the upper surface of the fixed chassis, roller pushers symmetrically arranged on the upper surface of the control turntable, and side clamping plates slidably connected to the top of the inner wall of the control turntable. The inner walls of the side clamping plates are provided with processing S-tubes, and the side clamping plates on both sides can clamp the side portions of the ends of the processing S-tubes. Figure 6 As shown, due to the expansion at both ends of the adapting groove, when the side clamps slide vertically upward under the control of the roller pusher box, the side clamps on both sides and the processing S-tube can penetrate through the adapting groove. Feeding bins are symmetrically arranged on both sides of the upper surface of the fixed chassis. The top of the side clamps penetrates the outside of the upper cover through the adapting groove. There are two roller pushers, and the lower surface of the roller pushers is fixedly connected to the upper surface of the control turntable. Both ends of the outer surface of the processing S-tube are pressed against the inner wall of the side clamps.

[0010] Furthermore, the feeding hopper includes a side fixing plate. An extended side box is fixedly connected to the upper surface of the side fixing plate via a support rod. A push slide rod is slidably connected to the side of the extended side box away from the docking tray via a slide groove. An external slide cylinder is fixedly connected to the end of the push slide rod away from the docking tray, and a vertical guide plate is fixedly connected to the end of the push slide rod near the docking tray. The end of the push slide rod can be extended to push the clamped S-tube inward. Arc-shaped clamps are symmetrically arranged on the upper and lower sides of the outer surface of the vertical guide plate via claws. The arc-shaped clamps on both sides can first clamp the end of the placed S-tube, and then push it to the side clamp to realize the work of transferring the tube. Since the arc-shaped clamps are vertically symmetrically arranged and staggered from the symmetrically arranged side clamps, there will be no work obstruction problem. The outer surface of the external sliding cylinder is slidably connected to the outer surface of the extended side box, the outer surface of the arc-shaped clamping plate is slidably connected to the outer surface of the vertical guide plate, the inner cavity of the extended side box is symmetrically provided with feeding slots on the side near the docking tray, and the lower surface of the side fixing plate is fixedly connected to the upper surface of the fixed chassis.

[0011] The beneficial effects of this invention are as follows:

[0012] 1. This device can completely penetrate the inner wall of the S-tube, enabling milling of the inner groove. Since the S-tube may gradually deviate during fixed operation, high-precision adjustments are required after each installation, consuming significant time and reducing processing efficiency. Therefore, this device incorporates a calibration mechanism at the axis. When the S-tube passes smoothly through the adapter groove, it indicates automatic calibration to the axis position, with no subsequent deviation, allowing the cutting head to perform the milling operation. By transforming the tube calibration process into a clear indication of passing through the adapter groove, the device ensures the S-tube passing through the groove remains stably in the axis position for milling, saving time on precise S-tube calibration and guaranteeing the tube's final position is suitable for milling without deviation.

[0013] 2. The matching grooves on both sides of the cover can be customized for cutting according to the model of the S-tube. Since the calibration equipment and the docking plates on both sides are combined in a splicing manner, the calibration equipment can be replaced at any time to adapt to different models of S-tubes. This ensures that the device is flexible in its use and can perform precise milling work on S-tubes of different sizes. The S-tube located at the axis has a symmetrical feature, so the cutting heads on both sides can perform milling work simultaneously, thereby effectively improving the milling efficiency.

[0014] 3. When the cutting head mills the inner wall of the S-tube, the milling chips will fall off and land on the docking tray and the upper surface of the calibration equipment. To prevent chips from accumulating inside the arc-shaped guide rail and affecting the rotation of the cover, a protective rotating shell is installed to prevent chips from interfering with the movement trajectory of the alarm. The chips that fall onto the upper surface of the cover can also be collected by removing the calibration equipment, thus realizing the chip recycling work and avoiding the problem of chips falling randomly inside the device and causing cleaning difficulties.

[0015] 4. The device clamps the S-tube with a side clamp and pushes it upward, adjusting the tube's horizontal height. The arc-shaped clamp performs fine-tuning and transfer of the tube, adjusting its position on the horizontal plane to ensure it can pass smoothly through the matching slot. When the tube cannot pass through the matching slot, the lower cover is pressed, triggering an alarm. At this time, the side clamp retracts its force in time, preventing the side clamp from continuing to push the tube that cannot pass through the matching slot, thus avoiding the problem of the cover being damaged or deformed due to excessive force. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention;

[0017] Figure 2 This is a cross-sectional view of the milled support component of the present invention;

[0018] Figure 3 This is a cross-sectional view of the calibration device of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the docking tray of the present invention;

[0020] Figure 5 This is the present invention. Figure 4 Enlarged view at point A;

[0021] Figure 6 This is a schematic diagram of the structure of the transfer device of the present invention;

[0022] Figure 7 This is a schematic diagram of the material supply bin of the present invention.

[0023] In the diagram: 1. Milling support; 2. Transfer equipment; 3. Calibration equipment; 31. Upper cover; 32. Compression washer; 33. Lower cover; 34. Adaptive groove; 35. Pressure sensing end; 36. Connecting wire; 37. Alarm; 11. Docking plate; 12. Arc-shaped guide rail; 13. Guide chute; 14. Protective rotating shell; 15. Displacement slide; 16. Control slide plate; 17. Vertical push plate; 18. Control motor; 19. Cutting head; 21. Fixed chassis; 22. Control turntable; 23. Roller push box; 24. Side clamping plate; 25. Machining S-tube; 4. Feeding bin; 41. Side fixing plate; 42. Support rod; 43. Extended side box; 44. External slide cylinder; 45. Vertical guide plate; 46. Arc-shaped clamping plate. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0025] Example 1, please refer to Figures 1-4 The present invention provides a technical solution: a milling device for the inner groove of an S-bend, including a milling support 1, a calibration device 3 provided in the middle of the milling support 1, and a transfer device 2 provided at the bottom of the milling support 1.

[0026] The calibration device 3 includes an upper cover 31, a compression washer 32 is fixedly connected to the inner wall of the upper cover 31, and a lower cover 33 is fixedly connected to the bottom of the compression washer 32. The upper cover 31 and the lower cover 33 are connected and combined to form a circular disc through the compression washer 32. The top of the inner cavity of the upper cover 31 is provided with an adapter groove 34. The adapter groove 34 is S-shaped to adapt to the processed tube, but the two ends are significantly expanded, and only the middle bending area is retained to adapt to the S-shaped tube. The adapter groove 34 extends to the outside of the lower cover 33. The S-tube can pass through the calibration device 3 through the adapter groove 34 when it is laid flat. A pressure-sensing end 35 is symmetrically fixed at the top center of the inner wall of the upper cover 31. A plug wire 36 is fixedly connected to the top of the pressure-sensing end 35. An alarm 37 is fixedly connected to the end of the plug wire 36 away from the pressure-sensing end 35.

[0027] The milling support 1 includes a docking plate 11. A guide groove 13 is provided on the side of the inner cavity of the docking plate 11 near the calibration device 3. An arc-shaped guide rail 12 is fixedly connected to the upper surface of the docking plate 11 near the pressure-sensing end 35. A protective rotating shell 14 is rotatably connected to the top of the inner wall of the arc-shaped guide rail 12. The docking plates 11 on both sides are combined with the disk of the calibration device 3 through the guide groove 13. The docking plates 11 on both sides can be perfectly docked to form a long plate. The arc-shaped guide rails 12 on both sides are also docked to form an arc-shaped rotating rail.

[0028] The outer surface of the upper cover 31 is rotatably connected to the inner cavity of the docking plate 11 through the guide groove 13. The outer surface of the lower cover 33 is pressed against the inner cavity of the docking plate 11 through the guide groove 13. The end of the plug wire 36 away from the pressure sensing end 35 extends into the interior of the protective rotating shell 14 through the through hole. The outer surface of the alarm 37 is rotatably connected to the inner wall of the arc-shaped guide rail 12.

[0029] A displacement groove 15 is provided on the side of the inner cavity of the docking plate 11 away from the arc-shaped guide rail 12. A vertical push plate 17 is provided on the inner wall of the displacement groove 15. A control motor 18 is fixedly connected to the top of the vertical push plate 17. A cutting head 19 is fixedly connected to the top of the output shaft of the control motor 18. A control slide plate 16 is fixedly connected to the bottom of the vertical push plate 17. The control slide plate 16 can drive the vertical push plate 17 to slide along the displacement groove 15, thereby adjusting the cutting point of the cutting head 19. The upper surface of the control slide plate 16 is slidably connected to the lower surface of the docking plate 11 through rollers. The bottom end of the vertical push plate 17 extends into the interior of the control slide plate 16. The outer surface of the vertical push plate 17 is slidably connected to the inner cavity of the docking plate 11 through the displacement groove 15, and both the upper and lower ends of the vertical push plate 17 extend into the exterior of the displacement groove 15. There are two docking trays 11 and two protective rotating shells 14. The lower surface of the docking tray 11 is fixedly connected to the ground. There are two pressure-sensing ends 35, and the bottom of the pressure-sensing ends 35 is pressed against the inner wall of the lower cover shell 33.

[0030] When using this device to mill S-bends, each S-tube is placed into the device via the transfer devices 2 on both sides. Then, the tube is lifted upwards in a flat position by the internal clamping device. At this time, the tube passes through the calibration device 3 along the matching grooves 34 of the lower cover 33 and the upper cover 31. Since the matching grooves 34 are located at the axial position of the device, the S-tubes that can pass through the matching grooves 34 are also clamped at the axial position. Otherwise, the tube cannot pass through the matching grooves 34 and needs to be adjusted by sliding.

[0031] When the S-tube passes through the adapter slot 34 of the cover, if the axial bend point of the S-tube is not aligned with the axial bend point of the adapter slot 34, the S-tube will not be able to pass through the adapter slot 34 of the lower cover 33. As it moves upward, the S-tube will exert an upward squeezing force on the lower cover 33. At this time, the lower cover 33 will apply an upward squeezing force to the compression washer 32, thereby pressing the internal pressure-sensing end 35 and triggering the alarms 37 on both sides. At this time, the S-tube will stop moving forward and its position will be finely adjusted before it is moved upward again until the S-tube can pass through the adapter slot 34 smoothly.

[0032] Example 2, please refer to Figures 1-7 This invention provides a technical solution: Based on embodiment 1, the transfer device 2 includes a fixed chassis 21. A control turntable 22 is rotatably connected to the axis of the upper surface of the fixed chassis 21. Roller push boxes 23 are symmetrically arranged at the center of the upper surface of the control turntable 22. Side clamping plates 24 are slidably connected to the top of the inner wall of the control turntable 22. The roller push boxes 23 can drive the lower part of the side clamping plates 24 to slide vertically through the rotating rollers on the inner wall, thereby adjusting the horizontal height of the side top. It can also change the distance between the two side clamping plates 24 by horizontally moving the top shell, thus achieving a clamping effect. The inner wall of the side clamping plates 24 is provided with a processed S-tube 25. The side clamping plates 24 on both sides can clamp the side parts of the processed S-tube 25 ends. Figure 6 As shown, due to the expansion of both ends of the adapting groove 34, when the side clamping plates 24 slide vertically upward under the control of the roller push box 23, the side clamping plates 24 on both sides and the processing S-tube 25 can penetrate through the adapting groove 34. The feeding bins 4 are symmetrically arranged on both sides of the upper surface of the fixed chassis 21. The top of the side clamping plate 24 penetrates through the adapting groove 34 to the outside of the upper cover shell 31. There are two roller push boxes 23, and the lower surface of the roller push box 23 is fixedly connected to the upper surface of the control turntable 22. Both ends of the outer surface of the processing S-tube 25 are pressed against the inner wall of the side clamping plate 24.

[0033] The feeding bin 4 includes a side fixing plate 41. An extension side box 43 is fixedly connected to the upper surface of the side fixing plate 41 via a support rod 42. A push slide rod is slidably connected to the side of the extension side box 43 away from the docking tray 11 via a slide groove. An external slide cylinder 44 is fixedly connected to the end of the push slide rod away from the docking tray 11, and a vertical guide plate 45 is fixedly connected to the end of the push slide rod near the docking tray 11. The end of the push slide rod can be extended to push the clamped S-tube inward. Arc-shaped clamping plates 46 are symmetrically arranged on the upper and lower sides of the outer surface of the vertical guide plate 45 via claws. The arc-shaped clamping plates 46 on both sides can first clamp the end of the placed S-tube, and then push it to the side clamping plate 24 to realize the work of transferring the tube. Since the arc-shaped clamping plates 46 are vertically symmetrically arranged and staggered from the side clamping plates 24 which are symmetrically arranged on the left and right, there will be no work obstruction problem. The outer surface of the external slide cylinder 44 is slidably connected to the outer surface of the extended side box 43, the outer surface of the arc-shaped clamp 46 is slidably connected to the outer surface of the vertical guide plate 45, the inner cavity of the extended side box 43 is symmetrically provided with a feeding slot on the side near the docking tray 11, and the lower surface of the side fixing plate 41 is fixedly connected to the upper surface of the fixed chassis 21.

[0034] The S-tube, having successfully passed through the cover, undergoes vertical height adjustment under the action of relevant clamping components. After being adjusted to match the height of the cutting heads 19 on both sides, the control turntable 22 at the bottom rotates the roller push boxes 23 on both sides. Through the side clamping plate 24, the cover plate rotates around the guide groove 13, thereby adjusting the end of the S-tube so that the end of the S-tube is directly facing the cutting heads 19 on both sides. Since the bending degree of the tube may vary, it is also necessary to adjust the cutting point angle of the cutting head 19. That is, the control slide plate 16 slides against the lower surface of the docking support plate 11. By driving the vertical push plate 17 to slide along the displacement groove 15, the cutting head 19 is controlled to slide, changing the cutting position of the cutting head 19 from the S-tube. Then, the cutting head 19 is pushed closer to the S-tube along the displacement groove 15, thereby realizing the milling work on the inner wall of the S-tube.

[0035] As the calibration device 3 rotates with the S-tube, the connector wire 36 also pulls the alarm 37 and the protective rotating shell 14 to rotate in a circle along the arc-shaped guide rail 12 that is merged on both sides, thereby ensuring that the connector wire 36 does not obstruct the rotation of the calibration device 3.

[0036] During the loading process, the solid machined S-tube 25 is placed flat inside the extension side box 43 through the slots on both sides. Then, one end of the machined S-tube 25 is inserted between the arc-shaped clamping plates 46. The vertical guide plate 45 then drives the arc-shaped clamping plates 46 on both sides to clamp the end of the machined S-tube 25. The machined S-tube 25 is then moved closer to the side clamping plates 24 by the pusher slide until the other end of the machined S-tube 25 is clamped by the side clamping plates 24. The vertical guide plate 45 is then retracted, and the remaining pair of side clamping plates 24 clamp the other end of the machined S-tube 25. Figure 6 As shown, the process S-tube 25 is now ready to be pushed vertically upwards.

[0037] When the S-tube 25 cannot pass through the fitting groove 34, the side clamp 24 is pulled down to release the clamping work of one end of the side clamp 24. The S-tube 25 is then advanced in the horizontal plane through the arc-shaped clamp 46 to achieve the fine adjustment of the tube body. After that, the tube body is clamped and advanced again. Subsequently, the tube body can pass through the fitting groove 34, thereby achieving the calibration work and ensuring that the S-tube is at the axial position. When its two ends rotate, they will always rotate around the axial center, so that the symmetrical cutting heads 19 on both sides can perform effective milling work at the same time.

[0038] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A milling device for the inner groove of an S-bend, comprising a milling support (1), wherein a calibration device (3) is provided in the middle of the milling support (1), and a transfer device (2) is provided at the bottom of the milling support (1), characterized in that: The calibration device (3) includes an upper cover (31), a compression washer (32) is fixedly connected to the inner wall of the upper cover (31), a lower cover (33) is fixedly connected to the bottom of the compression washer (32), an adapter groove (34) is provided at the top of the inner cavity of the upper cover (31), and the adapter groove (34) extends to the outside of the lower cover (33). A pressure-sensing end (35) is symmetrically fixed at the top center of the inner wall of the upper cover (31), a plug-in wire (36) is fixedly connected to the top of the pressure-sensing end (35), and an alarm (37) is fixedly connected to the end of the plug-in wire (36) away from the pressure-sensing end (35). The milling support (1) includes a docking support plate (11). A guide groove (13) is provided on the side of the inner cavity of the docking support plate (11) near the calibration device (3). An arc-shaped guide rail (12) is fixedly connected to the side of the upper surface of the docking support plate (11) near the pressure-sensing end (35). A protective rotating shell (14) is rotatably connected to the top of the inner wall of the arc-shaped guide rail (12).

2. The milling equipment for the inner groove of the S-bend according to claim 1, characterized in that: The outer surface of the upper cover (31) is rotatably connected to the inner cavity of the docking plate (11) through the guide groove (13). The outer surface of the lower cover (33) is pressed against the inner cavity of the docking plate (11) through the guide groove (13). The end of the plug wire (36) away from the pressure-sensing end (35) extends into the interior of the protective rotating shell (14) through the through hole. The outer surface of the alarm (37) is rotatably connected to the inner wall of the arc-shaped guide rail (12).

3. The milling equipment for the inner groove of the S-bend according to claim 2, characterized in that: The inner cavity of the docking plate (11) is provided with a displacement groove (15) on the side away from the arc guide rail (12), and the inner wall of the displacement groove (15) is provided with a vertical push plate (17). The top end of the vertical push plate (17) is fixedly connected to a control motor (18), the top end of the output shaft of the control motor (18) is fixedly connected to a cutting head (19), and the bottom end of the vertical push plate (17) is fixedly connected to a control slide plate (16).

4. The milling equipment for the inner groove of the S-bend according to claim 3, characterized in that: The upper surface of the control slide plate (16) is slidably connected to the lower surface of the docking tray (11) via rollers. The bottom end of the vertical push plate (17) extends into the interior of the control slide plate (16). The outer surface of the vertical push plate (17) is slidably connected to the inner cavity of the docking tray (11) via the displacement groove (15). Both the upper and lower ends of the vertical push plate (17) extend to the outside of the displacement groove (15).

5. The milling equipment for the inner groove of the S-bend according to claim 4, characterized in that: There are two docking trays (11) and two protective rotating shells (14). The lower surface of the docking tray (11) is fixedly connected to the ground. There are two pressure-sensing ends (35), and the bottom of the pressure-sensing ends (35) is pressed against the inner wall of the lower cover shell (33).

6. The milling equipment for the inner groove of the S-bend according to claim 1, characterized in that: The transfer device (2) includes a fixed chassis (21), a control turntable (22) is rotatably connected to the axis of the upper surface of the fixed chassis (21), a roller push box (23) is symmetrically arranged on the upper surface of the control turntable (22), a side clamping plate (24) is slidably connected to the top of the inner wall of the control turntable (22), a processing S-tube (25) is arranged on the inner wall of the side clamping plate (24), and a feeding bin (4) is symmetrically arranged on both sides of the upper surface of the fixed chassis (21).

7. The milling equipment for the inner groove of the S-bend according to claim 6, characterized in that: The top of the side clamp (24) penetrates the outside of the upper cover (31) through the adapting groove (34). There are two roller push boxes (23), and the lower surface of the roller push box (23) is fixedly connected to the upper surface of the control turntable (22). Both ends of the outer surface of the processing S tube (25) are pressed against the inner wall of the side clamp (24).

8. The milling equipment for the inner groove of the S-bend according to claim 7, characterized in that: The feeding bin (4) includes a side fixing plate (41). An extension side box (43) is fixedly connected to the upper surface of the side fixing plate (41) by a support rod (42). The side of the inner cavity of the extension side box (43) away from the docking tray (11) is slidably connected to a push slide rod through a slide groove. An external slide cylinder (44) is fixedly connected to the end of the push slide rod away from the docking tray (11), and a vertical guide plate (45) is fixedly connected to the end of the push slide rod close to the docking tray (11). Arc-shaped clamps (46) are symmetrically arranged on the upper and lower sides of the outer surface of the vertical guide plate (45) through claws.

9. The milling equipment for the inner groove of the S-bend according to claim 8, characterized in that: The outer surface of the external slide cylinder (44) is slidably connected to the outer surface of the extended side box (43), the outer surface of the arc-shaped clamp (46) is slidably connected to the outer surface of the vertical guide plate (45), the inner cavity of the extended side box (43) is symmetrically provided with a feeding slot on the side near the docking tray (11), and the lower surface of the side fixing plate (41) is fixedly connected to the upper surface of the fixed chassis (21).

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