Pipe fitting cutting device for liquid crystal display screen machining

Abstract

The invention discloses a pipe fitting cutting device for liquid crystal display screen machining, and relates to the technical field of pipe fitting cutting, the pipe fitting cutting device comprises a rack, and further comprises a pipe fitting clamping and rotating mechanism, a rotating ring rotating control mechanism, a pipe fitting front-back driving mechanism and a pipe fitting opposite-direction cutting mechanism, and the pipe fitting clamping and rotating mechanism comprises two front-back corresponding supporting rings; the bottom of the supporting ring on the front side is installed on the upper side of the rear end of the rack, the two supporting rings are connected through a supporting ring distance adjusting telescopic rod piece, each supporting ring is provided with a ring center clamping execution assembly, and the ring center clamping execution assemblies are connected with ring center clamping transmission assemblies. The rotating ring rotation control mechanism is connected with the ring center clamping transmission assembly; when the pipe fitting cutting device for liquid crystal display screen machining works, the cutting depth is only the thickness of the pipe wall of the pipe fitting to be cut, abrasion of the circular cutter can be effectively reduced, the cutter is prevented from being clamped or even damaged, and meanwhile the cutting face of the pipe fitting is smooth.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe cutting, in particular to a pipe cutting device for processing liquid crystal display screens. Background Art

[0002] Liquid crystal displays are used for screen displays on televisions and computers. During production and processing, liquid crystal displays require an internal frame and a support frame to form the main body. Many of these internal frames and support frames are made of round tubes. Therefore, when processing and manufacturing the internal frames and support frames of liquid crystal displays, cutting equipment is required to cut the round tubes into appropriate lengths, and then these cut tubes are made into the internal frames and support frames of the display.

[0003] When using existing cutting equipment, the cutting knife cuts from one side of the pipe fitting to the other side. As the cutting depth of the pipe fitting increases, the contact area between the cutting knife and the pipe fitting increases, the cutting knife wears faster, and it is easy for the cutting knife to get stuck or even damaged. At this time, the cut surface of the pipe fitting will also be uneven. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a pipe cutting device for processing liquid crystal display screens, which can make the pipe to be cut rotate stably around its own center when the pipe to be cut is clamped and fixed. The two groups of cutting components on both sides of the pipe cut both sides of the pipe to be cut at the same time, and the cutting depth is only the pipe wall thickness of the pipe to be cut, which can effectively reduce the wear of the circular cutting knife, avoid the knife from getting stuck or even damaging the cutting knife. At the same time, the cutting surface of the pipe is relatively flat, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a tube cutting device for processing liquid crystal display screens, comprising a stand and: The pipe clamping and rotating mechanism includes two corresponding front and rear support rings. The bottom of the front support ring is installed on the upper side of the rear end of the platform. The two support rings are connected by a telescopic rod for adjusting the support ring spacing. Each support ring is respectively installed with a ring center clamping actuator assembly, and the ring center clamping actuator assembly is connected to the ring center clamping transmission assembly. The swivel rotation control mechanism is connected to the ring center clamping transmission assembly; The front and rear driving mechanism for pipe fittings is installed on the upper side of the platform, and the front and rear driving mechanism for pipe fittings is installed with an inclined feeding mechanism, the inclined feeding mechanism is installed with a pipe fitting self-rotation driving mechanism, and the pipe fitting external support fixing mechanism is installed on the pipe fitting self-rotation driving mechanism; The pipe opposite cutting mechanism is installed on the stand, and the pipe opposite cutting mechanism is located in front of the support ring on the front side.

[0006] The support ring spacing adjustment telescopic rod can adjust the spacing between the two support rings as needed. The support ring is used to install the ring center clamping actuator. The pipe to be cut is a round pipe, and the pipe to be cut passes through the center of the two ring center clamping actuators. The swivel ring rotation control mechanism can synchronously control the two ring center clamping actuators to work through the two ring center clamping transmission assemblies. The two ring center clamping actuators can clamp the outer peripheral side of the pipe to be cut from the radial direction of the pipe to be cut. At this time, the pipe to be cut cannot move along its own radial direction. Since the contact area between the pipe to be cut and the ring center clamping actuator is small and the friction is small, if the pipe to be cut is pulled back and forth, the pipe to be cut will move back and forth relative to the ring center clamping actuator. While clamping the pipe to be cut from the outer peripheral side, the ring center clamping actuator also allows the pipe to be cut to rotate stably around its own center. The pipe front and rear driving mechanism is used to drive the inclined blanking mechanism, the pipe self-rotation driving mechanism and the pipe outer support fixing mechanism to move back and forth; The specific cutting process is as follows: the front and rear driving mechanisms of the pipe drive the inclined blanking mechanism, the pipe self-rotation driving mechanism and the pipe external support fixing mechanism to move backward, the rear end of the pipe self-rotation driving mechanism extends into the pipe to be cut, and then the pipe external support fixing mechanism fixes the external support of the pipe to be cut, and then the front and rear driving mechanisms of the pipe drive the inclined blanking mechanism, the pipe self-rotation driving mechanism, the pipe external support fixing mechanism and the pipe to be cut to move forward, after the pipe opposite cutting mechanism aligns with the position to be cut, the front and rear driving mechanisms of the pipe stop moving forward, the pipe self-rotation driving mechanism drives the pipe external support fixing mechanism and the pipe to be cut to rotate, the pipe opposite cutting mechanism cuts the pipe to be cut, and the pipe to be cut is cut into two sections. During this process, the pipe external support fixing mechanism can still fix the two sections of pipe to prevent one section from not moving. The rotation of the pipe self-rotation drive mechanism causes uneven incisions, and then the pipe external support fixing mechanism loosens the two sections of pipe. The front and rear driving mechanisms of the pipe again drive the inclined blanking mechanism, the pipe self-rotation drive mechanism, the pipe external support fixing mechanism and the cut pipe to move forward a short distance. The rear end of the pipe self-rotation drive mechanism is completely extended from the pipe to be cut remaining on the rear side. The inclined blanking mechanism drives the rear end of the pipe self-rotation drive mechanism to tilt downward, and the cut front section of the pipe also tilts accordingly. At this time, since the pipe external support fixing mechanism has loosened the front section of the pipe, the front section of the pipe slips off the rear end of the pipe self-rotation drive mechanism due to gravity, completing the blanking of the cut pipe. Then the inclined blanking mechanism drives the pipe self-rotation drive mechanism to return to a horizontal state. The above steps can be repeated to continuously complete the cutting work of the pipe to be cut.

[0007] When the length of the pipe to be cut is too short and is not enough for the required cutting length, the cutting work of the pipe opposite cutting mechanism in the above steps can be omitted. After the pipe external support fixing mechanism fixes the remaining pipe to be cut, the pipe front and rear drive mechanisms pull the remaining pipe to be cut forward and disengage them from the ring core clamping actuator. Then the pipe external support fixing mechanism releases the remaining pipe to be cut, and the tilting unloading mechanism tilts the pipe rotation drive mechanism and the remaining pipe to be cut. The remaining pipe to be cut falls due to gravity, completing the unloading work of the remaining pipe to be cut.

[0008] Furthermore, the annular core clamping actuator assembly includes a clamping swing arm, a clamping roller, and a second movable shaft. Three second movable shafts are arranged in an annular array on the side edges of the two support rings that are away from each other. Each second movable shaft is movably connected to one end of a clamping swing arm, and a clamping roller is rotatably mounted on the other end of each clamping swing arm. The annular core clamping transmission assembly is used to synchronously drive the three clamping swing arms on the support ring to swing, so that the three clamping rollers move toward the center of the support ring. The three clamping rollers radially clamp the outer side of the pipe to be cut, preventing the pipe to be cut from moving radially relative to itself. At this time, the pipe to be cut and the center of the support ring coincide. Due to the arrangement of the clamping rollers, the pipe to be cut can rotate about its own center. Due to the provision of two sets of annular core clamping actuator assemblies, the pipe to be cut can be stably maintained in a horizontal state. Because the contact areas of the clamping rollers and the outer side of the pipe to be cut are aligned, the friction between the clamping rollers and the outer side of the pipe to be cut is small, and the pipe to be cut can be pulled forward relative to the clamping rollers.

[0009] Furthermore, the ring-center clamping transmission assembly includes an inner ring, a swivel, a side through-slot, a movable shaft 1, and a control sleeve. The inner sides of the two support rings are rotatably connected to the inner rings, and the ends of the two inner rings that are away from each other are fixedly connected to the swivels. The side of each swivel is provided with three side through-slots in an annular array. Three control sleeves are movably connected to the three side through-slots via movable shaft 1. The three control sleeves are slidably connected to the corresponding three clamping swing arms. When the swivel is driven to rotate counterclockwise, the swivel drives the three control sleeves to rotate counterclockwise via movable shaft 1. The three control sleeves are slidably connected to the corresponding three clamping swing arms, so that the three clamping swing arms drive the three clamping rollers to gradually move closer to the center of the swivel, thereby completing the clamping work of the outer side of the pipe to be cut. If the swivel is driven to rotate clockwise, the three clamping rollers gradually leave the center of the swivel, making it convenient for the next pipe to be cut to be inserted into the center of the swivel and re-clamped and installed.

[0010] Furthermore, the swivel rotation control mechanism includes a fan-shaped through-slot, an ear seat, a follow-up telescopic rod, a first collar, a clamping control electric telescopic rod, and a second collar. The tops of the two support rings each have two fan-shaped through-slots, and the tops of the two swivels are fixedly connected to the two ear seats. The front and rear ends of the follow-up telescopic rod respectively pass through the two fan-shaped through-slots and are connected to the two ear seats. The middle portion of the fixed end of the follow-up telescopic rod is rotatably sleeved with a first collar. The first collar is connected to one end of the clamping control electric telescopic rod, and the other end of the clamping control electric telescopic rod is connected to a second collar. The second collar is rotatably mounted on the support ring spacing adjustment telescopic rod. When the clamping control electric telescopic rod extends, the first collar pushes the follow-up telescopic rod, which pushes the two swivels counterclockwise via the two ear seats. When the clamping control electric telescopic rod shortens, the follow-up telescopic rod pulls the two swivels clockwise via the two ear seats. The first and second collars are arranged to adapt to changes in the inclination angle of the clamping control electric telescopic rod as the length of the clamping control electric telescopic rod changes.

[0011] Furthermore, the pipe forward and backward drive mechanism includes a linear longitudinal drive assembly, a U-shaped seat, a cutting length control assembly, a cutting length limit switch and a bending plate. The U-shaped seat is installed on the upper side of the platform through the linear longitudinal drive assembly. The right front end of the U-shaped seat is fixedly connected to the horizontal end of the bending plate. The cutting length limit switch is installed on the right side of the platform through the cutting length control assembly. The bottom end of the vertical part of the bending plate is located directly in front of the cutting length limit switch. The linear longitudinal drive assembly is used to drive the U-shaped seat to move forward and backward relative to the platform. The U-shaped seat is used to install the inclined feeding mechanism. The cutting length control assembly is used to change the front and rear position of the cutting length limit switch. When the U-shaped seat moves backward, when the bending plate contacts the cutting length limit switch, the linear longitudinal drive assembly stops working and the rear end of the pipe rotation drive mechanism stops extending into the pipe to be cut. Therefore, the front and rear position of the cutting length limit switch relative to the platform can be changed as needed, thereby changing the length of the pipe to be cut.

[0012] Furthermore, the tilting unloading mechanism includes a unloading shaft, a rotating seat plate, and a tilting drive assembly. The inner side of the U-shaped seat is movably connected to the middle portion of the rotating seat plate via the unloading shaft, and the rear end bottom of the rotating seat plate is connected to the front end bottom of the U-shaped seat via the tilting drive assembly. The rotating seat plate moves relative to the U-shaped seat via the unloading shaft, thereby allowing the pipe rotation drive mechanism to tilt as needed. The tilting drive assembly provides power for the movement of the rotating seat plate, thereby controlling the tilt of the pipe rotation drive mechanism. When the rear end of the pipe rotation drive mechanism tilts downward, the cut pipe on the pipe rotation drive mechanism can fall according to its own gravity, completing the unloading of the cut pipe.

[0013] Furthermore, the pipe self-rotation drive mechanism includes a mounting seat, a drive cylinder, and a self-rotation drive assembly. The mounting seat is provided on the top rear side of the rotating seat plate, the mounting seat being rotatably connected to the longitudinal drive cylinder, and the front end of the drive cylinder is connected to the self-rotation drive assembly. When the drive cylinder is in a horizontal state, the centers of the drive cylinder, the pipe to be cut, and the swivel coincide, and the self-rotation drive assembly is able to drive the drive cylinder to rotate relative to the mounting seat. When the pipe external support and fixing mechanism tightens and fixes the pipe to be cut from the inside of the pipe to be cut, the pipe external support and fixing mechanism can drive the pipe to be cut to rotate about the center of the drive cylinder and the cut pipe.

[0014] Furthermore, the pipe external support fixing mechanism includes a spoke rod, an external support arc plate, a spring, a wheel frame, a wear-resistant wheel, an external support transmission assembly and an external support longitudinal movement control assembly. Two groups of guide grooves are provided on the outer peripheral side of the rear end of the driving cylinder, and each group of guide grooves includes four guide grooves distributed at equal angles. A spoke rod is slidably connected in each guide groove, and one end of the spoke rod located in the driving cylinder is fixedly connected to the wheel frame, and a wear-resistant wheel is rotatably connected to the wheel frame. The one end of the spoke rod located outside the driving cylinder is fixedly connected to the inner middle part of the external support arc plate, and an external support transmission assembly is provided in the middle part of the driving cylinder, and the front end of the external support transmission assembly is connected to the external support longitudinal movement control assembly. When it is necessary to tighten and fix the pipe to be cut, the outer support longitudinal movement control assembly drives the outer support transmission assembly to move backward relative to the driving cylinder, and the outer support transmission assembly pushes the spoke rod to extend from the driving cylinder, allowing the outer support arc plate to gradually move away from the driving cylinder. The outer support arc plate tightens and fixes the pipe to be cut from the inner side of the pipe to be cut. At this time, the spring is compressed by the wheel frame, and the setting of the wear-resistant wheel can reduce the friction with the outer support transmission assembly. Since there are two groups of guide grooves, each group has four, there are also two groups of outer support arc plates, each group has four. The pipe opposite cutting mechanism cuts the part of the pipe to be cut between the two groups of outer support arc plates. Even if the pipe to be cut is about to be cut, the two groups of outer support arc plates can also rotate with the driving cylinder. The stable rotation drives the front and rear parts of the pipe to be cut to rotate, avoiding the smoothness of the incision due to the non-rotation of a certain section. After the cutting is completed, the outer support longitudinal movement control component drives the outer support transmission component to move forward relative to the drive cylinder, and the spring rebounds and stretches, causing the spoke rod to gradually retract into the drive cylinder, and the outer support arc plate also gradually approaches the drive cylinder, thereby loosening the inner side of the pipe to be cut. The rear end of the pipe to be cut will not move downward due to the presence of the annular clamping actuator, and the cut pipe will fall slightly and close to the top of the outer support arc plate on the upper side. As the U-shaped seat moves forward, the cut pipe will also move forward. After that, the inclined unloading mechanism drives the rear end of the drive cylinder to tilt downward, and the cut pipe slides off from the rear end of the drive cylinder to complete the unloading.

[0015] Furthermore, the external support transmission assembly includes a control column and a tapered sleeve. The control column is longitudinally slidably connected to the middle portion of the drive cylinder. The control column is fixedly sleeved with a tapered sleeve corresponding to the position of the wear-resistant wheel. The front diameter of the tapered sleeve is larger than the rear diameter, and the wear-resistant wheel is in rolling contact with the outer side of the rear end of the corresponding tapered sleeve. The front end of the control column extends to the outer side of the front end of the drive cylinder and is connected to the external support longitudinal movement control assembly. The external support longitudinal movement control assembly drives the control column to move backward relative to the drive cylinder. The control column pushes the wear-resistant wheel through the tapered sleeve, allowing the spoke rod to extend from the drive cylinder. The external support longitudinal movement control assembly drives the control column to move forward relative to the drive cylinder. Due to the elastic force of the spring, the spoke rod can be retracted into the drive cylinder, thereby completing the tightening and loosening of the pipe to be cut.

[0016] Furthermore, the pipe cutting mechanism includes a bending frame, a movable arm, a pair of opposite swing control assemblies, and a pipe cutting assembly on both sides. The two sides of the pair of opposite swing control assemblies are respectively fixed to the two sides of the platform via the bending frame. The pair of opposite swing control assemblies are respectively connected to the top ends of the two movable arms. The bottom ends of the two movable arms are respectively equipped with two pipe cutting assemblies on both sides. The two pipe cutting assemblies on both sides are respectively located on the left and right sides of the driving cylinder. The bending frame is used to install the pair of opposite swing control assemblies. When cutting is required, the pair of opposite swing control assemblies drives the two movable arms toward each other, so that the two pipe cutting assemblies on both sides of the pipe to be cut are synchronously cut on both sides of the portion between the two sets of outer support arc plates. Since the pipe to be cut rotates around its own center, the cutting depth of the pipe to be cut by the pair of opposite swing control assemblies is only equal to the wall thickness of the pipe to be cut.

[0017] Compared with the prior art, the beneficial effects of the present invention on the pipe cutting device for processing liquid crystal display screens are: 1. The ring-core clamping transmission assembly is used to synchronously drive the three clamping swing arms on the support ring to swing, so that the three clamping rollers move toward the center of the support ring. The three clamping rollers clamp the outer side of the pipe to be cut radially, and the pipe to be cut can no longer move radially relative to itself. At this time, the pipe to be cut coincides with the center of the support ring. Due to the setting of the clamping rollers, the pipe to be cut can be allowed to rotate around its own center. Since the contact parts of the clamping rollers and the outer side of the pipe to be cut are in a straight line, the friction between the clamping rollers and the outer side of the pipe to be cut is small. By pulling the pipe to be cut, the pipe to be cut can move forward relative to the clamping rollers.

[0018] 2. The linear longitudinal movement drive assembly is used to drive the U-shaped seat to move forward and backward relative to the table. The U-shaped seat is used to install the inclined unloading mechanism. The cutting length control assembly is used to change the front and rear positions of the cutting length limit switch. When the U-shaped seat moves backward, when the bending plate contacts the cutting length limit switch, the linear longitudinal movement drive assembly stops working, and the rear end of the pipe rotation drive mechanism stops continuing to extend into the pipe to be cut. In this way, the front and rear positions of the cutting length limit switch relative to the table can be changed as needed, thereby changing the length of the pipe to be cut.

[0019] 3. The pipe to be cut can be stably rotated around its own center while the pipe to be cut is clamped and fixed. The two sets of cutting components on both sides of the pipe cut both sides of the pipe at the same time. The cutting depth is only the wall thickness of the pipe to be cut, which can effectively reduce the wear of the circular cutting knife, avoid the knife from getting stuck or even damaging the cutting knife, and at the same time, the cutting surface of the pipe is relatively smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a tube cutting device for processing liquid crystal display screens according to the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at center A; Figure 3 Schematic diagram of the partial structure of the pipe cutting device for processing liquid crystal display screens of the present invention Figure 1 ; Figure 4 Schematic diagram of the partial structure of the pipe cutting device for processing liquid crystal display screens of the present invention Figure 2 ; Figure 5 For the present invention Figure 4 A schematic diagram of the partially enlarged structure at point B in the middle; Figure 6 For the present invention Figure 4 Schematic diagram of the structure viewed from above; Figure 7 This is a schematic cross-sectional view of the driving cylinder in the tube cutting device for processing liquid crystal display screens of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the partially enlarged structure at point C in the middle; Figure 9 Schematic diagram of the structure of the pipe cutting mechanism in the present invention; In the figure: 1. Stand; 2. Pipe clamping and rotating mechanism; 21. Support ring; 22. Inner ring; 23. Swivel; 24. Side groove; 25. Active shaft 1; 26. Control sleeve; 27. Clamping swing arm; 28. Clamping roller; 29. ​​Active shaft 2; 3. Telescopic rod for adjusting the spacing between support rings; 31. Telescopic sleeve; 32. Telescopic column; 33. Locking bolt; 4. Rotating ring rotation control mechanism; 41. Fan-shaped through slot; 42. Ear seat; 43. Follow-up telescopic rod; 44. Collar 1; 45. Clamping control electric telescopic rod; 46. Collar 2; 5. Pipe fitting front and rear drive mechanism; 51. Linear motor guide rail; 52. Linear motor; 53. U-shaped seat; 54. Longitudinal rail; 55. Slide seat; 56. Butterfly fastening bolt; 57. Cutting length limit switch; 58. Bending plate; 6. Inclined unloading mechanism; 61. Unloading shaft; 62. Rotating seat plate; 63. Support; 64. Unloading control electric telescopic rod; 65. Movable seat; 7. Pipe fitting self-rotation drive mechanism; 71. Mounting seat; 72. Driving cylinder; 73. Driven gear; 74. Driving motor; 75. Driving gear; 8. Pipe external support fixing mechanism; 81. Spoke rod; 82. External support arc plate; 83. Spring; 84. Wheel frame; 85. Wear-resistant wheel; 86. Control column; 87. Conical sleeve; 88. Inner support sleeve; 89. External sleeve; 810. T-bar; 811. Fixing seat; 812. External support control electric telescopic rod; 813. Longitudinal guide rod; 9. Pipe cutting mechanism; 91. Bending frame; 92. Support frame; 93. Arch frame; 94. Cutting control electric telescopic rod; 95. Gear; 96. Double-sided rack; 97. Movable arm; 98. Motor sleeve; 99. Cutting motor; 910. Circular cutting blade; 10. Pipe fittings to be cut; DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] For example 1, please refer to Figures 1 to 9 This embodiment provides a technical solution: a pipe cutting device for processing liquid crystal display screens, including a stand 1, a pipe clamping and rotating mechanism 2, a swivel rotation control mechanism 4, a pipe forward and backward driving mechanism 5 and a pipe opposite cutting mechanism 9.

[0023] The pipe clamping and rotating mechanism 2 includes two corresponding front and rear support rings 21. The bottom of the front support ring 21 is installed on the upper side of the rear end of the stand 1. The two support rings 21 are connected by a telescopic rod 3 for adjusting the support ring spacing. Each support ring 21 is respectively installed with a ring center clamping execution component, and the ring center clamping execution component is connected to the ring center clamping transmission component.

[0024] The support ring spacing adjustment telescopic rod 3 includes a telescopic sleeve 31, a telescopic column 32 and a locking bolt 33. The front support ring 21 is fixedly connected to the front end of the four telescopic sleeves 31 in a circular array on the rear side. The four telescopic sleeves 31 are respectively longitudinally slidably connected to the four telescopic columns 32. The rear ends of the four telescopic columns 32 are fixedly connected to the front side of the rear support ring 21. The outer side of the rear end of each telescopic sleeve 31 is threadedly connected with a locking bolt 33. The locking bolt 33 presses against the corresponding telescopic column 32. The telescopic sleeve 31 and the telescopic column 32 constitute a telescopic rod for connecting the two support rings 21 while allowing the distance between the two support rings 21 to change. The locking bolt 33 is used to lock the telescopic sleeve 31 and the telescopic column 32 to fix the distance between the two support rings 21.

[0025] The annular clamping actuator includes a clamping swing arm 27, a clamping roller 28 and a movable shaft 29. Three movable shafts 29 are respectively arranged in a circular array on the side edges of the two support rings 21 away from each other. Each movable shaft 29 is movably connected to one end of the clamping swing arm 27, and the other end of each clamping swing arm 27 is rotatably installed with a clamping roller 28. The annular clamping transmission assembly is used to synchronously drive the three clamping swing arms 27 on the support ring 21 to swing, so that the three clamping rollers 28 move toward the center of the support ring 21. The three clamping rollers 28 clamp the outer side of the pipe 10 to be cut radially, and the pipe 10 to be cut can no longer move radially relative to itself. At this time, the pipe 10 to be cut coincides with the center of the support ring 21. Due to the setting of the clamping rollers 28, the pipe 10 to be cut can be allowed to rotate around its own center. Since two sets of annular clamping actuators are provided, the pipe 10 to be cut can be stably in a horizontal state. Since the contact parts of the clamping rollers 28 and the outer side of the pipe 10 to be cut are in a straight line, the friction between the clamping rollers 28 and the outer side of the pipe 10 to be cut is small. By pulling the pipe 10 to be cut, the pipe 10 to be cut can move forward relative to the clamping rollers 28.

[0026] The ring-center clamping transmission assembly includes an inner ring 22, a swivel 23, a side through groove 24, a movable shaft 25 and a control sleeve 26. The inner sides of the two support rings 21 are rotatably connected to the inner ring 22 through bearings, and the ends of the two inner rings 22 that are away from each other are fixedly connected to the swivel 23. Three side through grooves 24 are respectively opened in a circular array on the side of each swivel 23. Three control sleeves 26 are movably connected in the three side through grooves 24 through movable shafts 25. The three control sleeves 26 are respectively slidably connected to the corresponding three clamping swing arms 27. The swivel 23 is driven to rotate counterclockwise, and the swivel 23 drives the three control sleeves 26 to rotate counterclockwise through the movable shaft 1 25. The three control sleeves 26 are slidably connected with the corresponding three clamping swing arms 27, so that the three clamping swing arms 27 drive the three clamping rollers 28 to gradually move closer to the center of the swivel 23, which can complete the clamping work of the outside of the pipe 10 to be cut. If the swivel 23 is driven to rotate clockwise, the three clamping rollers 28 gradually leave the center of the swivel 23, which makes it convenient to insert the next pipe 10 to be cut into the center of the swivel 23 and then re-clamp and install it.

[0027] The swivel rotation control mechanism 4 is connected to the ring center clamping transmission assembly.

[0028] The swivel rotation control mechanism 4 includes a fan-shaped through slot 41, an ear seat 42, a follow-up telescopic rod 43, a collar 1 44, a clamping control electric telescopic rod 45 and a collar 2 46. The tops of the two support rings 21 are respectively provided with two fan-shaped through slots 41, and the tops of the two swivels 23 are respectively fixedly connected to the two ear seats 42. The front and rear ends of the follow-up telescopic rod 43 respectively pass through the two fan-shaped through slots 41 and are connected to the two ear seats 42. The middle part of the fixed end of the follow-up telescopic rod 43 is rotatably sleeved with a collar 1 44. The collar 1 44 is connected to one end of the clamping control electric telescopic rod 45, and the other end of the clamping control electric telescopic rod 45 is connected to the collar 2 46. The collar 2 46 is rotatably installed on the support ring spacing adjustment telescopic rod 3. The setting of the follow-up telescopic rod 43 is used to adapt to the change in the distance between the two support rings 21.

[0029] The second sleeve ring 46 is rotatably sleeved on the telescopic sleeve 31 located at the upper right side.

[0030] The clamping and controlling electric telescopic rod 45 is extended, and the follower telescopic rod 43 is pushed through the collar 1 44. The follower telescopic rod 43 pushes the two rotating rings 23 to rotate counterclockwise through the two ear seats 42. When the clamping and controlling electric telescopic rod 45 is shortened, the follower telescopic rod 43 pulls the two rotating rings 23 to rotate clockwise through the two ear seats 42. The arrangement of the collar 1 44 and the collar 2 46 adapts to the change of its own inclination angle when the length of the clamping and controlling electric telescopic rod 45 changes.

[0031] The pipe forward and backward driving mechanism 5 is installed on the upper side of the platform 1, and the pipe forward and backward driving mechanism 5 is installed with an inclined feeding mechanism 6, the inclined feeding mechanism 6 is installed with a pipe rotation driving mechanism 7, and the pipe rotation driving mechanism 7 is installed with a pipe external support fixing mechanism 8;

[0032] The front and rear driving mechanism 5 of the pipe fitting includes a linear longitudinal driving component, a U-shaped seat 53, a cutting length control component, a cutting length limit switch 57 and a bent plate 58. The U-shaped seat 53 is installed on the upper side of the stand 1 through the linear longitudinal driving component. The opening of the U-shaped seat 53 faces the rear, and the right front end of the U-shaped seat 53 is fixedly connected to the horizontal end of the bent plate 58. The cutting length limit switch 57 is installed on the right side of the stand 1 through the cutting length control component. The bottom end of the vertical part of the bent plate 58 is located directly in front of the cutting length limit switch 57.

[0033] The linear longitudinal motion drive assembly includes a linear motor guide rail 51 and a linear motor 52. Two longitudinal linear motor guide rails 51 are respectively installed on the left and right ends of the upper side of the platform 1. Two linear motors 52 are respectively installed on the two linear motor guide rails 51. The tops of the two linear motors 52 are respectively installed on both sides of the bottom of the U-shaped seat 53. The linear motor 52 moves back and forth along the linear motor guide rail 51, thereby driving the U-shaped seat 53 to move back and forth.

[0034] The cutting length control assembly includes a longitudinal rail 54, a slide 55 and a butterfly fastening bolt 56. The right side of the stand 1 is fixedly connected to the longitudinal rail 54, and the slide 55 is slidably installed on the longitudinal rail 54. The front end of the slide 55 is connected to the cutting length limit switch 57. The threaded through hole on the slide 55 is threadedly connected to the butterfly fastening bolt 56. The butterfly fastening bolt 56 presses against the longitudinal rail 54. Loosen the butterfly fastening bolt 56, adjust the position of the slide 55 along the longitudinal rail 54, and then re-tighten the butterfly fastening bolt 56. Re-lock the slide 55 and the longitudinal rail 54 to achieve adjustment of the front and rear position of the cutting length limit switch 57.

[0035] The linear longitudinal movement drive assembly is used to drive the U-shaped seat 53 to move forward and backward relative to the stand 1. The U-shaped seat 53 is used to install the inclined unloading mechanism 6. The cutting length control assembly is used to change the front and rear positions of the cutting length limit switch 57. When the U-shaped seat 53 moves backward, when the bending plate 58 contacts the cutting length limit switch 57, the linear longitudinal movement drive assembly stops working, and the rear end of the pipe rotation drive mechanism 7 stops continuing to extend into the pipe 10 to be cut. In this way, the front and rear positions of the cutting length limit switch 57 relative to the stand 1 can be changed as needed, thereby changing the length of the pipe 10 to be cut.

[0036] The inclined blanking mechanism 6 includes a blanking shaft 61, a rotating seat plate 62 and a tilting drive assembly. The inner side of the U-shaped seat 53 is movably connected to the middle part of the rotating seat plate 62 through the blanking shaft 61, and the rear end bottom of the rotating seat plate 62 is connected to the front end bottom of the U-shaped seat 53 through the tilting drive assembly.

[0037] The tilting drive assembly includes a support 63, an electric telescopic rod 64 for material discharge control and a movable seat 65. The front bottom of the U-shaped seat 53 is fixedly connected to the support 63, and the rear bottom of the rotating seat plate 62 is fixedly connected to the movable seat 65. The movable seat 65 is movably connected to one end of the electric telescopic rod 64 for material discharge control through a pin shaft, and the other end of the electric telescopic rod 64 for material discharge control is movably connected to the support 63 through a pin shaft. The shortening of the electric telescopic rod 64 for material discharge control can make the rear end of the rotating seat plate 62 and the pipe rotation drive mechanism 7 tilt downward, and the extension of the electric telescopic rod 64 for material discharge control can restore the rotating seat plate 62 and the pipe rotation drive mechanism 7 to a horizontal state.

[0038] The rotating seat plate 62 moves relative to the U-shaped seat 53 through the unloading shaft 61, so that the pipe rotation drive mechanism 7 can be tilted as needed. The tilting drive component provides power for the movement of the rotating seat plate 62, thereby controlling the tilting of the pipe rotation drive mechanism 7. When the rear end of the pipe rotation drive mechanism 7 tilts downward, the cut pipes on the pipe rotation drive mechanism 7 can fall according to their own gravity, completing the unloading of the cut pipes.

[0039] The pipe rotation drive mechanism 7 includes a mounting seat 71, a drive cylinder 72 and a rotation drive assembly. The mounting seat 71 is provided on the top rear side of the rotating seat plate 62. The mounting seat 71 is rotatably connected to the longitudinal drive cylinder 72 through a bearing, and the front end of the drive cylinder 72 is connected to the rotation drive assembly.

[0040] The self-rotation drive assembly includes a driven gear 73, a driving motor 74 and a driving gear 75. The driven gear 73 is installed on the outer side of the front end of the driving cylinder 72, and the driving motor 74 is installed on the mounting seat 71. The output shaft of the driving motor 74 is fixedly connected to the driving gear 75. The driving gear 75 is meshed with the driven gear 73. When the driving motor 74 works, the driving cylinder 72 is driven to rotate through the transmission of the driving gear 75 and the driven gear 73.

[0041] When the driving cylinder 72 is in a horizontal state, the centers of the driving cylinder 72, the pipe to be cut 10 and the rotating ring 23 coincide with each other, and the self-rotating driving assembly can drive the driving cylinder 72 to rotate relative to the mounting seat 71. When the pipe external support fixing mechanism 8 tightens and fixes the pipe to be cut 10 from the inner side of the pipe to be cut 10, the pipe to be cut 10 can be driven by the pipe external support fixing mechanism 8 to rotate around the center of the driving cylinder 72 and the pipe to be cut 10.

[0042] The pipe opposite cutting mechanism 9 is installed on the platform 1 , and the pipe opposite cutting mechanism 9 is located in front of the support ring 21 on the front side.

[0043] When in use, the support ring spacing adjustment telescopic rod 3 can adjust the spacing between the two support rings 21 as needed. The support ring 21 is used to install the ring core clamping execution component. The pipe 10 to be cut is a round tube. The pipe 10 to be cut passes through the center of the two ring core clamping execution components. The rotating ring rotation control mechanism 4 can synchronously control the two ring core clamping execution components to work through the two ring core clamping transmission components. The two ring core clamping execution components can clamp the outer peripheral side of the pipe 10 to be cut from the radial direction of the pipe 10 to be cut. At this time, the pipe to be cut The pipe 10 cannot move in its own radial direction. Since the contact area between the pipe 10 to be cut and the annular core clamping actuator is small and the friction is small, if the pipe 10 to be cut is pulled forward and backward, the pipe 10 to be cut will move forward and backward relative to the annular core clamping actuator. While clamping the pipe 10 to be cut from the outer circumference, the annular core clamping actuator also allows the pipe 10 to be cut to rotate stably around its own center. The pipe forward and backward driving mechanism 5 is used to drive the inclined feeding mechanism 6, the pipe rotation driving mechanism 7 and the pipe external support fixing mechanism 8 to move forward and backward;

[0044] The specific cutting process is as follows: the front and rear driving mechanism 5 of the pipe drives the inclined blanking mechanism 6, the self-rotating driving mechanism 7 and the external supporting and fixing mechanism 8 of the pipe to be cut to move backward, and the rear end of the self-rotating driving mechanism 7 extends into the pipe to be cut 10, and then the external supporting and fixing mechanism 8 externally supports and fixes the pipe to be cut 10, and then the front and rear driving mechanism 5 of the pipe drives the inclined blanking mechanism 6, the self-rotating driving mechanism 7, the external supporting and fixing mechanism 8 of the pipe and the pipe to be cut 10 to move forward, and after the pipe opposite cutting mechanism 9 is aligned with the position to be cut, the front and rear driving mechanism 5 of the pipe stops moving forward, and the self-rotating driving mechanism 7 drives the external supporting and fixing mechanism 8 and the pipe to be cut 10 to rotate, and the opposite cutting mechanism 9 of the pipe cuts the pipe to be cut 10, and the pipe to be cut 10 is cut into two sections of pipe. During this process, the external supporting and fixing mechanism 8 of the pipe can still externally fix the two sections of pipe to avoid it The middle section does not rotate with the pipe self-rotation drive mechanism 7, resulting in an uneven cut. Then the pipe external support fixing mechanism 8 loosens the two sections of the pipe, and the front and rear pipe driving mechanisms 5 again drive the inclined blanking mechanism 6, the pipe self-rotation drive mechanism 7, the pipe external support fixing mechanism 8 and the cut pipe to move forward a short distance. The rear end of the pipe self-rotation drive mechanism 7 is completely extended from the rear side of the pipe to be cut 10. The inclined blanking mechanism 6 drives the rear end of the pipe self-rotation drive mechanism 7 to tilt downward, and the cut front section of the pipe also tilts accordingly. At this time, since the pipe external support fixing mechanism 8 has loosened the front section of the pipe, the front section of the pipe slips off the rear end of the pipe self-rotation drive mechanism 7 due to gravity, completing the blanking of the cut pipe. Then the inclined blanking mechanism 6 drives the pipe self-rotation drive mechanism 7 to return to a horizontal state, and the above steps can be repeated to continuously complete the cutting work of the pipe 10 to be cut.

[0045] When the length of the pipe 10 to be cut is too short to meet the required cutting length, the cutting work of the pipe opposite cutting mechanism 9 in the above steps can be omitted. After the pipe external support fixing mechanism 8 externally supports and fixes the remaining pipe 10 to be cut, the pipe front and rear driving mechanism 5 pulls the remaining pipe 10 to be cut forward and disengages it from the annular clamping actuator. Then the pipe external support fixing mechanism 8 releases the remaining pipe 10 to be cut, and the tilting unloading mechanism 6 tilts the pipe rotation driving mechanism 7 and the remaining pipe 10 to be cut. The remaining pipe 10 to be cut falls due to gravity, completing the unloading work of the remaining pipe 10 to be cut.

[0046] For example 2, please refer to Figures 1 to 9 This embodiment provides a technical solution: a tube cutting device for processing liquid crystal display screens. This embodiment further explains the structure of the first embodiment: The pipe external support fixing mechanism 8 includes a spoke rod 81, an external support arc plate 82, a spring 83, a wheel frame 84, a wear-resistant wheel 85, an external support transmission assembly and an external support longitudinal movement control assembly. Two groups of guide grooves are provided on the outer peripheral side of the rear end of the driving cylinder 72. Each group of guide grooves includes four guide grooves distributed at equal angles. A spoke rod 81 is slidably connected in each guide groove. One end of the spoke rod 81 located in the driving cylinder 72 is fixedly connected to the wheel frame 84. The wear-resistant wheel 85 is rotatably connected to the wheel frame 84. The end of the spoke rod 81 located outside the driving cylinder 72 is fixedly connected to the inner middle part of the external support arc plate 82. An external support transmission assembly is provided in the middle part of the driving cylinder 72, and the front end of the external support transmission assembly is connected to the external support longitudinal movement control assembly. When it is necessary to tighten and fix the pipe 10 to be cut, the outer support longitudinal movement control assembly drives the outer support transmission assembly to move backward relative to the drive cylinder 72, and the outer support transmission assembly pushes the spoke rod 81 to extend from the drive cylinder 72, allowing the outer support arc plate 82 to gradually move away from the drive cylinder 72. The outer support arc plate 82 tightens and fixes the pipe 10 to be cut from the inner side of the pipe 10 to be cut. At this time, the spring 83 is compressed by the wheel frame 84, and the setting of the wear-resistant wheel 85 can reduce the friction with the outer support transmission assembly. Since there are two groups of guide grooves, each group has four, there are also two groups of outer support arc plates 82, each group has four. The pipe opposite cutting mechanism 9 cuts the part of the pipe 10 to be cut between the two groups of outer support arc plates 82. Even if the pipe 10 to be cut is about to be cut, the two groups of outer support arc plates 82 can also move with the drive The rotation of the cylinder 72 stably drives the front and rear parts of the pipe 10 to be cut to rotate, avoiding the smoothness of the incision being affected by the non-rotation of a certain section. After the cutting is completed, the outer support longitudinal movement control assembly drives the outer support transmission assembly to move forward relative to the drive cylinder 72, and the spring 83 rebounds and stretches, causing the spoke 81 to gradually retract into the drive cylinder 72, and the outer support arc plate 82 also gradually approaches the drive cylinder 72, thereby loosening the inner side of the pipe 10 to be cut. The rear end of the pipe 10 to be cut will not move downward due to the presence of the annular clamping execution assembly, and the cut pipe will fall slightly and close to the top of the outer support arc plate 82 on the upper side. As the U-shaped seat 53 moves forward, the cut pipe will also move forward. Thereafter, the inclined unloading mechanism 6 drives the rear end of the drive cylinder 72 to tilt downward, and the cut pipe slides off the rear end of the drive cylinder 72 to complete the unloading.

[0047] Specifically, the external support transmission assembly includes a control column 86 and a tapered sleeve 87. The control column 86 is longitudinally slidably connected to the middle part of the driving cylinder 72. The control column 86 is fixedly sleeved with the tapered sleeve 87 at the position corresponding to the wear-resistant wheel 85. The front end diameter of the tapered sleeve 87 is larger than the rear end diameter, and the wear-resistant wheel 85 is in rolling contact with the outer side of the rear end of the corresponding tapered sleeve 87. The front end of the control column 86 extends to the outer side of the front end of the driving cylinder 72 and is connected to the external support longitudinal movement control assembly.

[0048] The outer support transmission assembly further includes an inner support sleeve 88 . Two inner support sleeves 88 are fixedly connected to the inner side of the driving cylinder 72 , and the inner support sleeves 88 are slidably connected to the control column 86 .

[0049] The external support longitudinal movement control assembly drives the control column 86 to move backward relative to the drive cylinder 72. The control column 86 pushes the wear-resistant wheel 85 through the tapered sleeve 87, allowing the spoke rod 81 to extend from the drive cylinder 72. The external support longitudinal movement control assembly drives the control column 86 to move forward relative to the drive cylinder 72. Due to the elastic force of the spring 83, the spoke rod 81 can be retracted into the drive cylinder 72, thereby completing the tightening and loosening of the pipe 10 to be cut.

[0050] Specifically, the external support longitudinal movement control assembly includes an external sleeve 89, a T-bar 810, a fixed seat 811, an external support control electric telescopic rod 812 and a longitudinal guide rod 813. The front end of the control column 86 is rotatably connected to the external sleeve 89 through a bearing. The bottom of the external sleeve 89 is fixedly connected to the top of the T-bar 810. The two sides of the bottom of the T-bar 810 are longitudinally slidably connected to the two longitudinal guide rods 813 respectively. The front ends of the two longitudinal guide rods 813 are fixedly connected to the upper front end of the rotating seat plate 62 through the fixed seat 811. The middle of the fixed seat 811 is fixedly connected to the upper front end of the rotating seat plate 62. The rear side of the outer support is fixedly connected to the front end of the electric telescopic rod 812 controlled by the external support, and the rear end of the electric telescopic rod 812 controlled by the external support is fixedly connected to the bottom center of the T-shaped rod 810. The longitudinal guide rod 813 guides the movement direction of the T-shaped rod 810. The control column 86 is rotatably connected to the external sleeve 89. If the control column 86 rotates with the driving cylinder 72 due to friction, it will not affect the connection with the external sleeve 89. The extension and retraction of the electric telescopic rod 812 controlled by the external support can drive the control column 86 to move forward and backward through the T-shaped rod 810 and the external sleeve 89.

[0051] For example three, please refer to Figures 1 to 9 This embodiment provides a technical solution: a tube cutting device for processing liquid crystal display screens. This embodiment further explains the structure of the second embodiment: The pipe opposite cutting mechanism 9 includes a bending frame 91, a movable arm 97, an opposite swing control component and a pipe side cutting component. The two sides of the opposite swing control component are respectively fixed to the two sides of the platform 1 through the bending frame 91. The opposite swing control components are respectively connected to the top ends of the two movable arms 97. The bottom ends of the two movable arms 97 are respectively installed with two pipe side cutting components. The two pipe side cutting components are respectively located on the left and right sides of the driving cylinder 72.

[0052] The opposite swing control assembly includes a support frame 92, an arch frame 93, a cutting control electric telescopic rod 94, a gear 95 and a double-sided rack 96. The two sides of the support frame 92 are fixedly connected to the top of the two bent frames 91. The two sides of the support frame 92 are rotatably connected to two gears 95. The two gears 95 are fixedly connected to the top of the two movable arms 97. The middle part of the support frame 92 is vertically slidably connected to the double-sided rack 96. The double-sided rack 96 is located between the two gears 95, and the two sides of the double-sided rack 96 are respectively connected to the two gears. 95 is meshed and connected, an arch frame 93 is provided on the top of the support frame 92, and the top of the double-sided rack 96 is connected to the top of the arch frame 93 through a vertical cutting control electric telescopic rod 94. The cutting control electric telescopic rod 94 extends to push the double-sided rack 96 downward, and the meshing of the double-sided rack 96 with the two gears 95 drives the two movable arms 97 to open. The cutting control electric telescopic rod 94 shortens and pulls the double-sided rack 96 upward, and the meshing of the double-sided rack 96 with the two gears 95 drives the two movable arms 97 to move synchronously closer to each other.

[0053] The cutting components on both sides of the pipe fitting include a motor sleeve 98, a cutting motor 99 and a circular cutting knife 910. The bottom ends of the two movable arms 97 are fixedly connected to the two cutting motors 99 through the two motor sleeves 98. The output shafts at the rear ends of the two cutting motors 99 are fixedly connected to the two circular cutting knives 910. The cutting motor 99 drives the circular cutting knife 910 to rotate to cut the pipe fitting 10 to be cut. Since the pipe fitting 10 to be cut will be driven to rotate, the cutting depth of the circular cutting knife 910 on the pipe fitting 10 to be cut is the wall thickness of the pipe fitting 10 to be cut itself.

[0054] The bent frame 91 is used to install the opposite swing control component. When cutting is required, the opposite swing control component drives the two movable arms 97 to move closer to each other, so that the cutting components on both sides of the two pipe fittings can synchronously cut the pipe fitting 10 to be cut between the two sets of external support arc plates 82 on both sides. Since the pipe fitting 10 to be cut rotates around its own center, the cutting depth of the pipe fitting 10 to be cut by the cutting components on both sides of the pipe fitting is only the thickness of the pipe wall of the pipe fitting 10 to be cut. The positioning of the cutting position of the pipe fitting 10 to be cut can rely on an external limit switch or other corresponding displacement sensor. The specific installation and working method can adopt existing technology.

[0055] It is worth noting that the clamping control electric telescopic rod 45, linear motor 52, unloading control electric telescopic rod 64, drive motor 74, external support control electric telescopic rod 812, cutting control electric telescopic rod 94, and cutting motor 99 disclosed in the above embodiments are all controlled by an external PLC controller, and its control method adopts the method commonly used in the prior art. The drive motor 74 adopts a servo motor, and the external PLC controller is electrically connected to the cutting length limit switch 57, and the connection method also adopts the prior art.

[0056] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tube cutting device for processing liquid crystal display screens, comprising a stand (1), characterized in that: Also includes: The pipe clamping and rotating mechanism (2) comprises two front and rear corresponding support rings (21), the bottom of the front support ring (21) is mounted on the upper side of the rear end of the stand (1), the two support rings (21) are connected by a support ring spacing adjustment telescopic rod (3), each support ring (21) is respectively mounted with a ring core clamping actuator assembly, and the ring core clamping actuator assembly is connected to a ring core clamping transmission assembly; A swivel rotation control mechanism (4) connected to the ring center clamping transmission assembly; A pipe forward and backward driving mechanism (5) is installed on the upper side of the platform (1), and a tilting feeding mechanism (6) is installed on the pipe forward and backward driving mechanism (5), a pipe self-rotating driving mechanism (7) is installed on the tilting feeding mechanism (6), and a pipe external support fixing mechanism (8) is installed on the pipe self-rotating driving mechanism (7); The pipe fitting opposite cutting mechanism (9) is installed on the stand (1), and the pipe fitting opposite cutting mechanism (9) is located in front of the support ring (21) on the front side.

2. The tube cutting device for processing liquid crystal display screens according to claim 1, characterized in that: The annular clamping actuator assembly includes a clamping swing arm (27), a clamping roller (28) and a movable shaft (29). Three movable shafts (29) are respectively arranged in a circular array on the side edges of the two support rings (21) away from each other. Each movable shaft (29) is movably connected to one end of the clamping swing arm (27), and the other end of each clamping swing arm (27) is rotatably mounted with a clamping roller (28).

3. The tube cutting device for processing liquid crystal display screens according to claim 2, characterized in that: The annular clamping transmission assembly comprises an inner ring (22), a rotating ring (23), a side through groove (24), a movable shaft (25) and a control sleeve (26). The inner sides of the two support rings (21) are rotatably connected to the inner ring (22), and the ends of the two inner rings (22) away from each other are fixedly connected to the rotating ring (23). The side surface of each rotating ring (23) is provided with three side through grooves (24) in a circular array. Three control sleeves (26) are movably connected to the three side through grooves (24) through movable shaft (25). The three control sleeves (26) are slidably connected to the corresponding three clamping swing arms (27).

4. The tube cutting device for processing liquid crystal display screens according to claim 3, characterized in that: The rotating ring rotation control mechanism (4) includes a fan-shaped through slot (41), an ear seat (42), a follow-up telescopic rod (43), a collar (44), a clamping control electric telescopic rod (45) and a collar (46). The tops of the two support rings (21) are respectively provided with two fan-shaped through slots (41), and the tops of the two rotating rings (23) are respectively fixedly connected to the two ear seats (42). The front and rear ends of the follow-up telescopic rod (43) respectively pass through the two fan-shaped through slots (41) and are connected to the two ear seats (42). The middle part of the fixed end of the follow-up telescopic rod (43) is rotatably sleeved with a collar (44). The collar (44) is connected to one end of the clamping control electric telescopic rod (45), and the other end of the clamping control electric telescopic rod (45) is connected to the collar (46). The collar (46) is rotatably mounted on the support ring spacing adjustment telescopic rod (3).

5. The tube cutting device for processing liquid crystal display screens according to claim 1, characterized in that: The pipe front and rear driving mechanism (5) includes a linear longitudinal driving assembly, a U-shaped seat (53), a cutting length control assembly, a cutting length limit switch (57) and a bending plate (58). The U-shaped seat (53) is installed on the upper side of the stand (1) through the linear longitudinal driving assembly. The right front end of the U-shaped seat (53) is fixedly connected to the horizontal end of the bending plate (58). The cutting length limit switch (57) is installed on the right side of the stand (1) through the cutting length control assembly. The bottom end of the vertical part of the bending plate (58) is located directly in front of the cutting length limit switch (57).

6. The tube cutting device for processing liquid crystal display screens according to claim 5, characterized in that: The inclined blanking mechanism (6) comprises a blanking shaft (61), a rotating seat plate (62) and an inclined driving assembly. The inner side of the U-shaped seat (53) is movably connected to the middle part of the rotating seat plate (62) through the blanking shaft (61), and the rear end bottom of the rotating seat plate (62) is connected to the front end bottom of the U-shaped seat (53) through the inclined driving assembly.

7. The tube cutting device for processing liquid crystal display screens according to claim 6, characterized in that: The pipe self-rotation drive mechanism (7) comprises a mounting seat (71), a drive cylinder (72) and a self-rotation drive assembly. The mounting seat (71) is provided on the top rear side of the rotating seat plate (62). The mounting seat (71) is rotatably connected to the longitudinal drive cylinder (72). The front end of the drive cylinder (72) is connected to the self-rotation drive assembly.

8. The tube cutting device for processing liquid crystal display screens according to claim 7, characterized in that: The pipe external support fixing mechanism (8) includes a spoke rod (81), an external support arc plate (82), a spring (83), a wheel frame (84), a wear-resistant wheel (85), an external support transmission assembly and an external support longitudinal movement control assembly. Two groups of guide grooves are provided on the outer peripheral side of the rear end of the driving cylinder (72), each group of guide grooves respectively includes four guide grooves distributed at equal angles, and a spoke rod (81) is slidably connected in each guide groove. One end of the spoke rod (81) located in the driving cylinder (72) is fixedly connected to the wheel frame (84), and the wear-resistant wheel (85) is rotatably connected to the wheel frame (84). One end of the spoke rod (81) located outside the driving cylinder (72) is fixedly connected to the inner middle part of the external support arc plate (82), and the external support transmission assembly is provided in the inner middle part of the driving cylinder (72). The front end of the external support transmission assembly is connected to the external support longitudinal movement control assembly.

9. The tube cutting device for processing liquid crystal display screens according to claim 8, characterized in that: The external support transmission assembly includes a control column (86) and a tapered sleeve (87). The control column (86) is longitudinally slidably connected to the middle portion of the driving cylinder (72). The control column (86) is fixedly sleeved with the tapered sleeve (87) at the position corresponding to the wear-resistant wheel (85). The front end diameter of the tapered sleeve (87) is larger than the rear end diameter, and the wear-resistant wheel (85) is in rolling contact with the outer side of the rear end of the corresponding tapered sleeve (87). The front end of the control column (86) extends to the outer side of the front end of the driving cylinder (72) and is connected to the external support longitudinal movement control assembly.

10. The tube cutting device for processing liquid crystal display screens according to claim 1, characterized in that: The pipe opposite cutting mechanism (9) comprises a bending frame (91), a movable arm (97), an opposite swing control assembly and a pipe two-side cutting assembly. The two sides of the opposite swing control assembly are respectively fixed to the two sides of the platform (1) through the bending frame (91). The opposite swing control assembly is respectively connected to the top ends of the two movable arms (97). The bottom ends of the two movable arms (97) are respectively equipped with two pipe two-side cutting assemblies.

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