Automatic core-through bending equipment for metal pipes and its production process

Abstract

The present invention relates to the technical field of pipe processing, and discloses an automatic core-threading and bending equipment for metal pipes and a production process thereof, comprising a gripper, a bending mechanism, a control screen, a machine, a moving device, a frame and a feeder. In the present invention, the electric clamping block rotates in an arc shape with the bending rod as the center, and drives the metal pipe to bend. When bending, the metal pipe follows the bending and moves to a certain extent. While being clamped by the clamping block, the metal pipe moves horizontally in the sliding rod, so as to avoid the pipe rubbing against the inner side of the movable block during the bending process, causing loose fixation. The movable rod is inserted into the metal pipe at the horizontal block position under the drive of the hydraulic press. The arc plates on both sides of the outer shell follow the bending movement of the metal pipe through rubber strips, and the two symmetrical elastic strips bend on both sides respectively, so that the two arc plates outside the elastic strip generate a resisting force on the inner walls on the left and right sides of the metal pipe, and resist the deformation stress generated by the bending, so as to avoid the deformation stress generated by the bending of the metal pipe causing depression at the bent part of the metal pipe.

Description

Technical Field

[0001] The invention relates to the technical field of pipe processing, in particular to automatic core-threading and bending equipment for metal pipes and a production process thereof. Background Art

[0002] The layout of pipelines requires a variety of angles and bends to adapt to different spatial arrangements and work requirements, so it is necessary to use automatic core bending equipment to bend metal pipe fittings. Therefore, in industrial production, the direction and angle of metal pipes need to be changed to adapt to different work occasions. However, when the metal pipe fittings are bent, the movement of the bending position will drive the entire pipe fitting to move, and the position of the pipe fittings needs to be clamped and limited. The existing method uses relatively smooth balls to guide the metal pipe fittings to slide horizontally. The clamped pipe fittings are still prone to friction at the clamping point when moving, and are prone to loose clamping. When bending metal pipe fittings, since the metal pipe fittings are hollow, a certain resistance force needs to be generated on the inner wall of the metal pipe fittings. The existing springs with a certain bending force are used as a barrier to metal bending, but there is a gap between the core rod inserted into the metal pipe fitting and the inner wall of the pipe fitting. When the pipe fittings are bent, the core rod's pressure on the pipe fitting due to the gap is weak, and a certain degree of dents are still easily generated under the bending stress of the metal pipe fittings. Summary of the Invention

[0003] The present invention provides an automatic core-through bending device for metal pipes and a production process thereof, which overcome the deficiencies described in the background art.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] An automatic core-through bending device for metal pipes, comprising a gripper, a bending mechanism, a control panel, a machine platform, a mobile device, a frame, and a feeder. The control panel is mounted on the side of the frame, and the control panel's electrical signals are connected to the mobile device and the machine platform. The gripper is disposed at the lower end of the mobile device, and the bending mechanism is disposed on the upper surface of the machine platform. The gripper vertically grasps the metal pipe corresponding to the feeder.

[0006] The bending mechanism is provided with a through rod, a clamping block, a limit plate, a bending rod, a rotating plate, a support block, a pusher and a hydraulic pusher. The surface of the machine is provided with an electric motor, and the output end of the motor is connected to the through rod. The surface of the machine is provided with a horizontally arranged hydraulic press, and the through rod is arranged at the output end of the hydraulic press. The hydraulic pusher is located inside the limit plate, and the hydraulic pusher drives the limit plate to push inward, and the through rod passes through the middle of the limit plate. The support block is arranged on the side of the machine, and a rotating plate is provided on the outside of the support block, and an electric drive device is provided inside the rotating plate. The electric drive device rotates and cooperates in the support block and causes the rotating plate to rotate with the support block as the center. A pusher is provided on the surface of the rotating plate, and the clamping block connected to the output end of the pusher is extended and retracted toward the bending rod, and the bending rod is located at the central axis position of the support block. When the clamping block rotates, the clamping block presses and drives the metal pipe to bend in an arc shape.

[0007] Among them, there are two moving devices, and the lower end of the two moving devices is respectively provided with a gripper, and the gripper is in a left-right symmetrical clamping state. The gripper clamps the metal pipe from the feeder to the bending mechanism, and the other gripper clamps the metal pipe at the bending mechanism position to the designated external position for removal.

[0008] Furthermore, the electric drive device inside the rotating plate has the effect of controlling the rotation angle, and the degree of bending of the metal pipe is controlled by inputting the rotation angle through the control screen.

[0009] In which, the limit plate is provided with a first fixed block, a movable block, a horizontal block, and a second fixed block. The first fixed block and the second fixed block are respectively provided with movable blocks on the inner sides. The first fixed block and the second fixed block are each provided with a hydraulic pusher connected in series. The movable blocks are symmetrically arranged at the output ends of the two hydraulic pushers. The metal pipe is located on the surface of the horizontal block. The electrical signal drives the movable block at the output end of the hydraulic pusher. The movable block clamps the metal pipe. When the metal pipe bends, the metal pipe elastically translates in the movable block.

[0010] Among them, the movable block is provided with a sliding rod, a spring, a connecting plate and a clamping block. The sliding rod is arranged on the inner side of the connecting plate, and the sliding rod passes through the protruding part of the clamping block. A spring is provided on the other side of the protruding part. When the clamping block follows the translation of the metal pipe, the clamping block moves horizontally through the sliding rod, and the protruding part of the clamping block drives the spring to elastically stretch.

[0011] In addition, there are two clamping blocks, which are horizontally distributed on the inner side of the connecting plate. There is a gap between the two clamping blocks. The gripper places a metal pipe in the gap between the corresponding clamping blocks to prevent the through rod from being misaligned when inserted into the metal pipe, and to avoid the metal pipe from sliding easily when placed on a plane, causing inaccurate bending position.

[0012] Among them, the through-core rod is provided with a rubber rod, an elastic strip, an outer shell and a movable rod. The elastic strip is symmetrically arranged on the outside of the rubber rod, the rubber rod is located in the middle position of the movable rod, and the outer shell is arranged on the side of the movable rod. The rubber rod is made of soft plastic material. When the outer shell bends, the elastic strip inside the outer shell presses the rubber rod and drives the rubber rod to bend.

[0013] In addition, the shell is provided with a rubber plate, a rubber strip and an arc plate. The rubber plate is symmetrically attached to the side of the arc plate, and the rubber strips are equidistantly arranged on the side of the arc plate. When the arc plate bends, the arc plate stretches the rubber strip, and the arc plate presses the elastic strip, and the elastic strip is compressed and generates elastic tension outward.

[0014] Based on the above-mentioned production process of a metal pipe automatic core bending equipment, the specific steps are as follows:

[0015] S1: Input the movement command from the control panel, and electrically drive the moving device to move on the frame, driving the gripper on the moving device to grab the metal pipe at the feeder position and move it to the horizontal block position in the bending mechanism. The gripper puts the metal pipe into the gap between the clamping blocks. At this time, the metal pipe is tangent to one side of the bending rod;

[0016] S2: The hydraulic pusher drives the movable block to clamp the metal pipe in the middle of the horizontal block, and the motor pushes the core rod to insert into the metal pipe;

[0017] S3: The pusher drives the clamping block to move and press against the metal pipe fitting on the side of the bending rod. At the same time, the electric drive device in the rotating plate drives the rotating plate to rotate around the support block. At this time, the clamping block rotates in an arc and drives the metal pipe fitting on the side of the bending rod to bend.

[0018] S4: When the metal pipe is bent, the end pressed by the clamping block bends along with the bending rod, and pulls the other end of the metal pipe to elastically pull the clamping block;

[0019] S5: After the metal pipe is bent, the core rod is reset and separated from the inside of the metal pipe, and at the same time, the rotating plate is driven to rotate and reset, and the movable block at the output end of the hydraulic pusher is reset and moved to release the clamping of the metal pipe. The metal pipe is grabbed and removed from the bending mechanism position by another moving device.

[0020] Compared with the existing technology, this technical solution has the following advantages:

[0021] When the electrically driven rotating plate rotates in the present invention, the clamping block rotates in an arc shape with the bending rod as the center, and drives the metal pipe to bend. When bending, the metal pipe moves to a certain extent following the bending, and is clamped by the clamping block while moving horizontally in the sliding rod, ensuring that the pipe remains clamped and fixed when bending, avoiding friction on the inner side of the movable block during the bending process, causing the pipe to be loosely fixed.

[0022] In the present invention, the movable rod is inserted into the metal pipe at the horizontal block position under the drive of the hydraulic device. When the metal pipe bends, the curved plates on both sides of the shell follow the bending of the metal pipe through the rubber strips, and the elastic strips on the inner side of the curved plates press the rubber rods. At this time, the curved plates compress the rubber plates. Under the bending force, the two symmetrical elastic strips bend on both sides respectively. The stress bending of the elastic strips generates an outward elastic force, so that the two curved plates outside the elastic strips generate a pressing force on the inner walls on the left and right sides of the metal pipe, and press the deformation stress generated by the bending, thereby preventing the deformation stress generated by the bending of the metal pipe from causing the bending part of the metal pipe to be concave. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and examples.

[0024] Figure 1 This is an overall diagram of the present invention.

[0025] Figure 2 It is a planar schematic diagram of the bending mechanism.

[0026] Figure 3 A side view of the limiting plate.

[0027] Figure 4 It is a three-dimensional schematic diagram of the movable block.

[0028] Figure 5 A side view of the through-core rod.

[0029] Figure 6 Schematic diagrams of the three-dimensional and planar shell.

[0030] In the figure: gripper-1, bending mechanism-2, control panel-3, machine platform-4, moving device-5, frame-6, feeder-7.

[0031] Core rod-21, clamping block-22, limiting plate-23, bending rod-24, rotating plate-25, supporting block-26, pusher-27, hydraulic pusher-28.

[0032] First fixed block 231 , movable block 232 , horizontal block 233 , second fixed block 234 , slide bar 321 , spring 322 , connecting plate 323 , clamping block 324 .

[0033] Rubber rod 211, elastic strip 212, housing 213, movable rod 214, rubber plate 131, rubber strip 132, curved plate 133. DETAILED DESCRIPTION

[0034] like Figures 1 to 6As shown, the present invention proposes an automatic core bending device for metal pipes, including a gripper 1, a bending mechanism 2, a control panel 3, a machine table 4, a mobile device 5, a frame 6 and a feeder 7. The control panel 3 is installed on the side of the frame 6, and the electrical signal of the control panel 3 is connected to the mobile device 5 and the machine table 4. The gripper 1 is arranged at the lower end of the mobile device 5, and the bending mechanism 2 is arranged on the upper surface of the machine table 4. The gripper 1 vertically grabs the metal pipe corresponding to the feeder 7;

[0035] The bending mechanism 2 is provided with a core rod 21, a clamping block 22, a limit plate 23, a bending rod 24, a rotating plate 25, a support block 26, a pusher 27 and a hydraulic pusher 28. The surface of the machine 4 is provided with a motor, the output end of the motor is connected to the core rod 21, the surface of the machine 4 is provided with a horizontally arranged hydraulic press, the core rod 21 is arranged at the output end of the hydraulic press, the hydraulic pusher 28 is located inside the limit plate 23, and the hydraulic pusher 28 drives the limit plate 23 to push inward, the core rod 21 passes through the middle of the limit plate 23, the The support block 26 is arranged on the side of the machine 4, and a rotating plate 25 is provided on the outside of the support block 26, and an electric drive device is provided inside the rotating plate 25. The electric drive device rotates and cooperates in the support block 26, and causes the rotating plate 25 to rotate with the support block 26 as the center. A pusher 27 is provided on the surface of the rotating plate 25, and the clamping block 22 connected to the output end of the pusher 27 is extended and retracted toward the bending rod 24. The bending rod 24 is located at the central axis position of the support block 26. When the clamping block 22 rotates, the clamping block 22 presses and drives the metal pipe to bend in an arc shape.

[0036] Among them, there are two moving devices 5, and the lower end of the two moving devices 5 is respectively provided with a gripper 1, and the gripper 1 is in a left-right symmetrical clamping state. The gripper 1 clamps the metal pipe from the feeder 7 to the bending mechanism 2, and the other gripper 1 clamps the metal pipe at the bending mechanism 2 to the designated external position for removal.

[0037] Furthermore, the electric drive device inside the rotating plate 25 has the effect of controlling the rotation angle, and the degree of bending of the metal pipe is controlled by inputting the rotation angle through the control panel 3 .

[0038] Among them, the limiting plate 23 is provided with a first fixed block 231, a movable block 232, a horizontal block 233, and a second fixed block 234. The first fixed block 231 and the second fixed block 234 are respectively provided with movable blocks 232 on the inner sides. The first fixed block 231 and the second fixed block 234 are each provided with a hydraulic pusher 28 connected in series. The movable block 232 is symmetrically arranged at the output ends of the two hydraulic pushers 28. The metal pipe is located on the surface of the horizontal block 233. The electrical signal drives the movable block 232 at the output end of the hydraulic pusher 28. The movable block 232 clamps the metal pipe. When the metal pipe is bent, the metal pipe elastically translates in the movable block 232.

[0039] In addition, a gap is provided in the middle of the horizontal block 233 , which facilitates the placement of metal pipes and prevents the metal pipes from moving when placed on the surface of the horizontal block 233 .

[0040] Among them, the movable block 232 is provided with a sliding rod 321, a spring 322, a connecting plate 323 and a clamping block 324. The sliding rod 321 is arranged on the inner side of the connecting plate 323, and the sliding rod 321 passes through the raised part of the clamping block 324. A spring 322 is provided on the other side of the raised part. When the clamping block 324 follows the translation of the metal pipe, the clamping block 324 moves horizontally through the sliding rod 321, and the raised part of the clamping block 324 drives the spring 322 to elastically stretch.

[0041] In addition, there are two clamping blocks 324, which are horizontally distributed on the inner side of the connecting plate 323. There is a gap between the two clamping blocks 324. The gripper 1 places a metal pipe corresponding to the gap between the clamping blocks 324 to prevent the through rod 21 from being misaligned when inserted into the metal pipe, and to avoid the metal pipe from sliding easily when placed on a plane, causing inaccurate bending position.

[0042] In the present invention, the metal pipe will move when it bends. At this time, the clamping block 324 clamps the metal pipe and elastically translates the clamping block 324 in the slide rod 321 through the spring 322, so that the metal pipe can translate following the bending force while being fixedly clamped by the clamping block 324.

[0043] In the present invention, after the gripper 1 to the feeder 7 clamps the metal pipe to the position of the horizontal block 233, it drives the hydraulic pusher 28 to translate the two movable blocks 232, and makes the movable block 232 clamp the metal pipe in the middle of the fixed horizontal block 233. At this time, the metal pipe is tangent to the bending rod 24 and extends to the right, so the pusher 27 drives the clamping block 22 to translate, so that the clamping block 22 is pressed against the tangent point between the bending rod 24 and the metal pipe, so that when the electrically driven turn plate 25 rotates, the clamping block 22 rotates in an arc with the bending rod 24 as the center, and drives the metal pipe to bend. When bending, the metal pipe moves a certain amount following the bending, and is clamped by the clamping block 324 while moving horizontally in the slide bar 321, ensuring that the pipe remains clamped and fixed when bending, and avoiding the pipe rubbing on the inner side of the movable block 232 during the bending process, causing it to be loosely fixed.

[0044] Among them, the through rod 21 is provided with a rubber rod 211, an elastic strip 212, a shell 213 and a movable rod 214. The elastic strip 212 is symmetrically arranged on the outside of the rubber rod 211, the rubber rod 211 is located in the middle of the movable rod 214, and the shell 213 is arranged on the side of the movable rod 214. The rubber rod 211 is made of soft plastic material. When the shell 213 bends, the elastic strip 212 inside the shell 213 presses against the rubber rod 211 and drives the rubber rod 211 to bend.

[0045] In addition, the housing 213 is provided with a rubber plate 131, a rubber strip 132 and a curved plate 133. The rubber plate 131 is symmetrically attached to the side of the curved plate 133, and the rubber strips 132 are equidistantly arranged on the side of the curved plate 133. When the curved plate 133 bends, the curved plate 133 stretches the rubber strip 132, and the curved plate 133 presses the elastic strip 212, and the elastic strip 212 is compressed and generates elastic tension outward.

[0046] Furthermore, the elastic strip 212 is hollow in the middle. When the middle of the elastic strip 212 is bent, both sides of the elastic strip 212 are easily elastic.

[0047] Among them, the movable rod 214 can be threaded and disassembled, and the length can be adjusted by replacing the outer shell 213 on the right side of the movable rod 214 so that the length of the outer shell 213 is the length of the bending of the metal pipe. The outer shell 213 is inserted into the metal pipe and supports and presses the bending position.

[0048] In the present invention, the movable rod 214 is inserted into the metal pipe at the position of the horizontal block 233 under the drive of the hydraulic press. When the metal pipe bends, the curved plates 133 on both sides of the shell 213 follow the bending of the metal pipe through the rubber strips 132, and the elastic strips 212 inside the curved plates 133 press against the rubber rod 211. At this time, the curved plates 133 compress the rubber plate 131. Under the bending force, the two symmetrical elastic strips 212 bend on both sides respectively. The stress bending of the elastic strips 212 generates an outward elastic force, so that the two curved plates 133 outside the elastic strips 212 generate a pressing force on the inner walls on the left and right sides of the metal pipe, and press the deformation stress generated by the bending, thereby preventing the deformation stress generated by the bending of the metal pipe from causing a depression at the bending part of the metal pipe.

[0049] Based on the above-mentioned production process of a metal pipe automatic core bending equipment, the specific steps are as follows:

[0050] S1: Input a movement command from the control panel 3, and electrically drive the mobile device 5 to move on the frame 6, driving the gripper 1 on the mobile device 5 to grab the metal pipe at the feeder 7 position to the horizontal block 233 position in the bending mechanism 2. The gripper 1 puts the metal pipe into the gap between the clamping blocks 324. At this time, the metal pipe is tangent to one side of the bending rod 24.

[0051] S2: The hydraulic pusher 28 drives the movable block 232 to clamp the metal pipe in the middle of the horizontal block 233, and at the same time the motor pushes the core rod 21 to insert into the metal pipe;

[0052] S3: The pusher 27 drives the clamping block 22 to move and press against the metal pipe fitting on the side of the bending rod 24. At the same time, the electric drive device in the rotating plate 25 is driven to drive the rotating plate 25 to rotate around the support block 26. At this time, the clamping block 22 rotates in an arc and drives the metal pipe fitting on the side of the bending rod 24 to bend;

[0053] S4: When the metal pipe is bent, the end pressed by the clamping block 22 bends along with the bending rod 24 and pulls the other end of the metal pipe to elastically pull the clamping block 324;

[0054] S5: After the metal pipe is bent, the core rod 21 is reset and separated from the inside of the metal pipe, and at the same time, the rotating plate 25 is driven to rotate and reset. The movable block 232 at the output end of the hydraulic pusher 28 is reset and moved to release the clamping of the metal pipe. The metal pipe is grabbed and removed from the bending mechanism 2 position by another moving device 5.

[0055] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of the present invention. In other words, equivalent changes and modifications made according to the scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. An automatic core bending device for metal pipes, characterized in that: It includes a gripper (1), a bending mechanism (2), a control panel (3), a machine (4), a moving device (5), a frame (6) and a feeder (7), wherein the control panel (3) is mounted on the side of the frame (6), and the electrical signal of the control panel (3) is connected to the moving device (5) and the machine (4), the gripper (1) is arranged at the lower end of the moving device (5), the bending mechanism (2) is arranged on the upper surface of the machine (4), and the gripper (1) vertically grabs the metal pipe corresponding to the feeder (7); The bending mechanism (2) is provided with a core rod (21), a clamping block (22), a limit plate (23), a bending rod (24), a rotating plate (25), a supporting block (26), a pusher (27) and a hydraulic pusher (28). The surface of the machine (4) is provided with a motor, the output end of the motor is connected to the core rod (21), the surface of the machine (4) is provided with a horizontally arranged hydraulic press, the core rod (21) is arranged at the output end of the hydraulic press, the hydraulic pusher (28) is located inside the limit plate (23), and the hydraulic pusher (28) drives the limit plate (23) to push inward, and the core rod (21) passes through the middle of the limit plate (23). The support block (26) is arranged on the side of the machine (4), and a rotating plate (25) is provided on the outside of the support block (26), and an electric driving device is provided inside the rotating plate (25). The electric driving device rotates and cooperates in the support block (26) and causes the rotating plate (25) to rotate with the support block (26) as the center. A pusher (27) is provided on the surface of the rotating plate (25). The clamping block (22) connected to the output end of the pusher (27) is extended and retracted toward the bending rod (24). The bending rod (24) is located at the central axis position of the support block (26). When the clamping block (22) rotates, the clamping block (22) presses and drives the metal pipe to bend in an arc shape. The limit plate (23) is provided with a movable block (232), and the movable block (232) is provided with a slide rod (321), a spring (322), a connecting plate (323) and a clamping block (324). The slide rod (321) is provided on the inner side of the connecting plate (323), and the slide rod (321) passes through the convex portion of the clamping block (324). A spring (322) is provided on the other side of the convex portion. When the clamping block (324) moves horizontally following the metal pipe fitting, the clamping block (324) moves horizontally through the slide rod (321), and the convex portion of the clamping block (324) drives the spring (322) to elastically stretch. The core rod (21) is provided with a rubber rod (211), an elastic strip (212), a shell (213) and a movable rod (214), wherein the elastic strip (212) is symmetrically arranged on the outside of the rubber rod (211), the rubber rod (211) is located in the middle of the movable rod (214), and the shell (213) is arranged on the side of the movable rod (214). The rubber rod (211) is made of soft plastic material. When the shell (213) is bent, the elastic strip (212) inside the shell (213) presses the rubber rod (211) and drives the rubber rod (211) to bend; The housing (213) is provided with a rubber plate (131), a rubber strip (132) and an arc plate (133). The rubber plate (131) is symmetrically attached to the side of the arc plate (133), and the rubber strips (132) are equidistantly arranged on the side of the arc plate (133). When the arc plate (133) bends, the arc plate (133) stretches the rubber strip (132), and the arc plate (133) presses the elastic strip (212), so that the elastic strip (212) is compressed and generates elastic tension outward.

2. The automatic core bending equipment for metal pipes according to claim 1, characterized in that: The limiting plate (23) is further provided with a first fixed block (231), a horizontal block (233), and a second fixed block (234). The first fixed block (231) and the second fixed block (234) are respectively provided with movable blocks (232) on their inner sides. The first fixed block (231) and the second fixed block (234) are each provided with a hydraulic pusher (28) connected in series. The movable blocks (232) are symmetrically arranged at the output ends of the two hydraulic pushers (28). The metal pipe is located on the surface of the horizontal block (233). An electrical signal drives the movable block (232) at the output end of the hydraulic pusher (28). The movable block (232) clamps the metal pipe. When the metal pipe is bent, the metal pipe elastically translates in the movable block (232).

3. The automatic core bending equipment for metal pipes according to claim 2, characterized in that: Two clamping blocks (324) are provided and horizontally distributed on the inner side of the connecting plate (323). A gap exists between the two clamping blocks (324). The gripper (1) is provided with a metal pipe fitting corresponding to the gap between the clamping blocks (324).

4. A production process for an automatic core-through bending device for metal pipes according to claim 3, characterized in that: The specific steps are as follows: S1: Input a movement command from the control panel (3), and electrically drive the moving device (5) to move on the frame (6), driving the gripper (1) on the moving device (5) to grab the metal pipe at the position of the feeder (7) to the position of the horizontal block (233) in the bending mechanism (2), and the gripper (1) puts the metal pipe into the gap between the clamping blocks (324). At this time, the metal pipe is tangent to one side of the bending rod (24); S2: The hydraulic pusher (28) drives the movable block (232) to clamp the metal pipe in the middle of the horizontal block (233), and the motor pushes the core rod (21) to insert into the metal pipe; S3: The pusher (27) drives the clamping block (22) to move and press the metal pipe fitting on the side of the bending rod (24). At the same time, the electric drive device in the rotating plate (25) is driven to drive the rotating plate (25) to rotate around the support block (26). At this time, the clamping block (22) rotates in an arc and drives the metal pipe fitting on the side of the bending rod (24) to bend; S4: When the metal pipe is bent, the end pressed by the clamping block (22) bends along with the bending rod (24), and pulls the other end of the metal pipe to elastically pull the clamping block (324); S5: After the metal pipe is bent, the core rod (21) is reset and separated from the inside of the metal pipe, and at the same time, the rotating plate (25) is driven to rotate and reset, and the movable block (232) at the output end of the hydraulic pusher (28) is reset and moved to release the clamping of the metal pipe. The metal pipe is grabbed and removed from the bending mechanism (2) by another moving device (5).

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