A pipe bending machine for basketball stand processing

Abstract

The present application relates to the technical field of pipe bending equipment and provides a pipe bending machine for basketball stand processing, comprising a frame assembly and a press-bending assembly; the press-bending assembly comprises a central mold, a first arc-shaped half mold, a second arc-shaped half mold, and a drive mechanism, the drive mechanism being used to drive the first arc-shaped half mold, the second arc-shaped half mold, and the central mold to approach each other until they are in contact with each other; wherein, the central mold comprises a circular base, a plurality of movable inserts slidingly arranged on the surface of the circular base, and a pushing mechanism for forcing each movable insert to move outward; the upper edge of the circular base is provided with a first concave arc, and the lower edge of each movable insert is provided with a second concave arc. In the press-bending operation state, each movable insert moves outward to an extreme position; the circular base is also provided with a reset mechanism for forcing each movable insert to move inward and gather together. Based on this, the pipe can be easily removed after being press-bent, improving the convenience of the material removal operation.

Description

Technical Field

[0001] The present application relates to the technical field of pipe bending equipment, and in particular to a pipe bending machine for processing basketball stands. Background Art

[0002] A basketball hoop is an essential piece of equipment in basketball. It provides a target for players to shoot from and is a key feature in both competition and training. Its structural components primarily include a backboard, a hoop, a support frame, and a base. The hoop is a standard circular ring on the hoop, typically made of metal with a diameter of approximately 45 cm.

[0003] The processing of basketball hoops usually requires placing pipes on a pipe bender for bending. A Chinese patent application with publication number CN116116960A discloses a pipe bender for basketball hoops, comprising a machine base, a bending device, a pipe bending device, and a cleaning device. The cleaning device includes a placement seat having an inner cavity for placing pipes, and the placement seat is slidably disposed between the bending device and the pipe bending device. During use, the pipe to be bent is placed in the inner cavity of the placement seat, and the servo motor in the bending device is controlled to force the pipe to collide with the pressure plate, thereby facilitating the bending of the pipe at an angle, achieving an automatic bending effect.

[0004] Regarding the above-mentioned related technical solutions, since the pipe fittings are directly inserted into the inner cavity of the placement seat for positioning, it is difficult to remove the bent pipe from the inner cavity after the pipe fittings are bent and formed. The material removal operation is very inconvenient, time-consuming and labor-intensive, and needs to be improved. Summary of the Invention

[0005] Based on this, the present application provides a pipe bending machine for basketball stand processing, which can easily remove the pipe after it is press-bent and formed, thereby improving the convenience of the material removal operation.

[0006] The present application provides a pipe bending machine for basketball stand processing that adopts the following technical solutions:

[0007] A pipe bending machine for manufacturing basketball hoops comprises a frame assembly and a press-bending assembly disposed on a surface of the frame assembly; the press-bending assembly comprises a central mold, a first arcuate half mold, a second arcuate half mold, and a driving mechanism; the first arcuate half mold and the second arcuate half mold are respectively located on opposite sides of the central mold, and an inner cavity is provided on the outer periphery of the central mold; the inner curved surface of the first arcuate half mold and the inner curved surface of the second arcuate half mold are both provided with an outer cavity; the driving mechanism is used to drive the first arcuate half mold, the second arcuate half mold, and the central mold to move closer to each other until they are in contact with each other, at which point a forming area adapted to the shape of the basketball frame is formed between the inner cavity and the two outer cavities;

[0008] The central mold includes a circular base, a plurality of movable inserts slidably disposed on the surface of the circular base, and a pushing mechanism for forcing each movable insert to move outward. All movable inserts are spaced apart around the central axis of the circular base, and the moving direction of each movable insert is the same as the radial direction of the circular base.

[0009] The upper edge of the circular base is provided with a first concave arc, and the lower edge of each movable insert is provided with a second concave arc. In the bending operation state, the pushing mechanism can force each movable insert to move outward to the extreme position. At this time, the first concave arc and each second concave arc together form an inner cavity; the circular base is also provided with a reset mechanism. When the pushing mechanism is separated from the movable insert, the reset mechanism can force each movable insert to move inward and gather together.

[0010] Optionally, the second arc-shaped half mold is fixedly arranged on the frame assembly, the first arc-shaped half mold and the center mold are both slidably arranged on the frame assembly, and a placement station for placing pipe fittings is provided between the first arc-shaped half mold and the center mold; a locking mechanism is provided between the center mold and the frame assembly, and the locking mechanism is used to limit the movement of the center mold in a direction close to the second arc-shaped half mold;

[0011] The driving mechanism is arranged between the first arc-shaped half mold and the frame assembly. In the first stage of the bending operation, the driving mechanism forces the first arc-shaped half mold to approach the center mold. At this time, the center mold is kept in position by the locking mechanism; in the second stage of the bending operation, the first arc-shaped half mold is pressed against the center mold, forcing the locking mechanism to unlock. At this time, the first arc-shaped half mold pushes the center mold to move toward the second arc-shaped half mold, so as to realize that the first arc-shaped half mold, the center mold and the second arc-shaped half mold are brought close to each other to abutment.

[0012] Optionally, a support portion is protruding from the side of the first arc-shaped half mold close to the second arc-shaped half mold, and there are two support portions, which are respectively arranged on both side edges of the first arc-shaped half mold, and the two support portions together form a placement station; the frame assembly is fixed with two track plates, and the two track plates are respectively located on two opposite sides of the placement station, and the spacing between the two track plates matches the axial length of the pipe.

[0013] Optionally, a sliding base is fixed to the bottom of the center mold, and the center mold is slidably connected to the frame assembly through the sliding base; the side fixing frame of the sliding base is provided with an extension column;

[0014] The locking mechanism includes a fixed base, a hook-shaped plate rotatably connected to the fixed base, and a torsion spring disposed between the hook-shaped plate and the fixed base. The hook-shaped plate is provided with a hooking opening that cooperates with the extension column. In the first stage of the bending operation, the extension column and the hooking opening cooperate to limit the position.

[0015] The torsion spring is used to force the abutment portion to rotate toward the fixed base in a normal state. At this time, the hook plate is located on the moving path of the extension column, and when the center mold moves and resets, the extension column can abut against the hook plate and force the hook plate to rotate away from the fixed base.

[0016] Optionally, a guide portion is provided on the side of the hook plate, and the guide portion is normally inclined; a guide column is provided on the outside of the first arc-shaped half-mold, and the guide column is arranged along the moving direction of the first arc-shaped half-mold and opposite to the guide portion, and after the first section of the bending operation, the guide column can be against the guide portion and force the hook plate to rotate in a direction away from the fixed base, so that the extension column can smoothly detach from the hook mouth.

[0017] Optionally, the pushing mechanism includes a central shaft, a pushing seat and a base plate. The central shaft is movably arranged in the circular base and remains coaxial with the circular base. The pushing seat is fixedly connected to the top end of the central shaft and is located above the circular base. The base plate is fixedly connected to the bottom end of the central shaft and is located below the circular base. A linear drive member is provided between the base plate and the circular base. When the linear drive member is actuated, the pushing seat enters the middle of each movable insert and forces each movable insert to move outward.

[0018] Optionally, a rotating seat is fixed to the bottom of the circular base, a sliding base is provided on the outer peripheral side of the rotating seat, and the central mold is slidably connected to the frame assembly through the sliding base; the fixed end of the linear drive member is fixed to the rotating seat to achieve circumferential linkage between the linear drive member and the circular base;

[0019] A plurality of linkage parts are provided on the outer peripheral side of the push seat. When the linear drive member is in motion, the linkage parts are matched and clamped in the area between two adjacent movable inserts to realize the circumferential linkage between the push seat and the circular base. An operating mechanism for forcing the circular base to rotate is also provided at the bottom of the frame assembly.

[0020] Optionally, the operating mechanism includes a sliding support slidably mounted on the frame assembly, an operating handle rotatably mounted on the sliding support, a first bevel gear fixedly connected to the end of the operating handle, and a second bevel gear fixed to the bottom of the base plate; the sliding support is connected to the sliding base, and when the driving mechanism is actuated, the second bevel gear moves toward the direction close to the first bevel gear and finally engages with the first bevel gear for transmission.

[0021] Optionally, the second arc-shaped half mold includes two molding mold bases arranged in a mirror image, and the inner arc side of each molding mold base is provided with an inner groove; wherein, the molding mold base is slidably connected to the frame assembly, and the moving directions of the two molding mold bases are set at an angle. When the center mold abuts against the two molding mold bases and forces the two molding mold bases to move, the two molding mold bases can approach each other to abutment state, and at this time the two inner grooves jointly form an outer cavity.

[0022] Optionally, a plurality of wedge-shaped chutes are provided on the surface of the circular base, and the extension direction of the wedge-shaped chutes is the same as the radial direction of the circular base; a wedge-shaped slider is provided at the bottom of each movable insert, and the wedge-shaped slider is slidably installed inside the wedge-shaped chutes;

[0023] The reset mechanism includes a limit plate and a magnetic assembly. The limit plate is fixed to the surface of the circular base and is located inside each wedge-shaped slide groove. The number of magnetic assemblies matches the number of wedge-shaped sliders. Each magnetic assembly includes a first magnet fixedly embedded in the wedge-shaped slider and a second magnet fixedly embedded in the limit plate. The magnetic poles of the first magnet and the second magnet are opposite.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By placing the pipe to be bent on the placement station between the first arc-shaped half mold and the center mold, the drive mechanism is controlled to drive the first arc-shaped half mold, the second arc-shaped half mold and the center mold to move closer to each other until they are in contact. The pipe can be bent into a shape that matches the forming area, thereby obtaining the desired spherical frame shape.

[0026] 2. By arranging multiple movable inserts on the circular base, during the bending operation, the push seat of the push mechanism enters the middle of each movable insert, forcing each movable insert to move outward to the extreme position. At this time, the first concave arc and each second concave arc can jointly enclose an inner cavity to facilitate the smooth bending of the pipe. After the bending operation is completed and the push seat moves upward to separate from each movable insert, the movable insert can automatically move toward the limit plate using the magnetic attraction of the magnetic assembly, thereby forcing each movable insert to retract and automatically enter the inner side of the outer edge area of ​​the circular base. At this time, the bent pipe can be directly and conveniently removed from the circular base, greatly improving the convenience of the material removal operation.

[0027] 3. During the first bending operation, the central die remains stationary thanks to the stoppered position between the hook plate and the extension post. Driven by the drive mechanism, the first curved half-die gradually approaches the central die, smoothly bending the tube into a U-shape. Then, as the first curved half-die continues to move, the guide post on the outside of the first curved half-die abuts the guide portion of the hook plate, forcing the hook plate to rotate away from the extension post, allowing the extension post to smoothly disengage from the hook plate. At this point, the first curved half-die pushes the central die, moving together toward the second curved half-die, further bending the tube into a circular ring.

[0028] 4. By arranging multiple linkage parts on the outer side of the push seat, when the linear drive member is actuated to force the push seat to enter the middle of each movable insert, the linkage part can match and enter the area between adjacent movable inserts to realize the circumferential linkage between the push seat and the circular base; if the end of the U-shaped tube fitting cannot smoothly enter the outer cavity of the second arc-shaped half mold after the first section of the bending operation is completed, the operator can control the operating handle to force the circular base and the U-shaped tube fitting to rotate, and then the U-shaped tube fitting can be partially bent again, which is conducive to the end of the U-shaped tube fitting to smoothly enter the outer cavity.

[0029] 5. By setting two forming die bases, the two forming die bases are far away from each other in the initial state. At this time, the distance between the inner grooves of the two forming die bases is large, which is conducive to the end of the U-shaped pipe fitting to smoothly enter the inner groove after the first section of the bending operation is completed, thereby helping the pipe fitting to be smoothly bent into a circular shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0031] Figure 2 This is a structural diagram of the disassembly and assembly of the frame top plate, the first arc-shaped half mold, and the second arc-shaped half mold in an embodiment of the present application;

[0032] Figure 3 Schematic diagram of the bottom structure of the rack top plate in an embodiment of the present application;

[0033] Figure 4 This is a bottom-up structural diagram of the center mold in an embodiment of the present application;

[0034] FIG5 is a top view of the central mold in an embodiment of the present application;

[0035] Figure 6 This is a schematic structural diagram of a movable insert in an embodiment of the present application;

[0036] Figure 7 This is a structural diagram of the central mold and operating mechanism in an embodiment of the present application;

[0037] Figure 8 This is a diagram showing the coordination structure of the locking mechanism and the extension column in an embodiment of the present application;

[0038] Figure 9 This is a half-section structural diagram of the first arc-shaped half mold in the embodiment of the present application.

[0039] Description of reference numerals: 1, frame assembly; 11, frame top plate; 12, frame bottom plate; 13, support column; 14, slide groove; 15, slideway opening; 16, spring seat; 17, first spring;

[0040] 2. Center mold; 21. Circular base; 211. Wedge-shaped slide; 212. Center groove; 213. First concave arc; 22. Movable insert; 221. Wedge-shaped slider; 222. Second concave arc; 23. Sliding mechanism; 231. Center axis; 232. Sliding seat; 233. Base plate; 234. Linear drive element; 235. Linkage unit; 24. Rotating seat; 25. Sliding base; 251. Extension column; 26. Inner cavity; 27. Limiting plate; 28. Magnetic assembly; 281. First magnet; 282. Second magnet;

[0041] 3. First arc-shaped half mold; 31. Sliding column block; 311. Guide column; 312. Second spring; 32. External cavity; 33. Support column; 34. Placement station; 4. Second arc-shaped half mold; 41. Forming mold base; 42. Inner groove; 43. Avoidance groove; 44. Slide rail;

[0042] 5. Driving mechanism; 51. Threaded rod; 52. Driving motor; 53. Guide rod; 6. Operating mechanism; 61. Sliding support; 611. Connecting column; 62. Operating handle; 63. First bevel gear; 64. Second bevel gear;

[0043] 7. Track plate; 71. Limiting guide rail; 8. Locking mechanism; 81. Fixed base; 82. Hook plate; 821. Hooking opening; 822. Abutting portion; 823. Guide portion; 83. Torsion spring. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1 -Attached Figure 9 This application is described in further detail.

[0045] The embodiment of the present application discloses a pipe bending machine for processing basketball stands.

[0046] Reference Figure 1 A pipe bending machine for basketball stand processing includes a frame assembly 1 and a bending assembly; the frame assembly 1 includes a frame top plate 11 and a frame bottom plate 12, and support columns 13 are respectively fixed at the four corners of the top surface of the frame bottom plate 12. The frame top plate 11 is fixedly connected to the support columns 13, thereby being fixedly mounted above the frame bottom plate 12. The bending assembly is arranged on the surface of the frame top plate 11, and the bending assembly includes a center mold 2, a first arc-shaped half mold 3, a second arc-shaped half mold 4 and a driving mechanism 5. The first arc-shaped half mold 3 and the second arc-shaped half mold 4 are respectively arranged on two opposite sides of the center mold 2; the driving mechanism 5 is used to drive the first arc-shaped half mold 3, the center mold 2 and the second arc-shaped half mold 4 to move closer to each other, so that the three can finally abut against each other to achieve bending forming of the pipe.

[0047] Reference Figure 2The first arcuate half mold 3 is arranged in a C-shape as a whole. The inner arc surface of the first arcuate half mold 3 is provided with an outer cavity 32, which extends through both ends of the arc direction of the first arcuate half mold 3. It should be noted that the cross-sectional shape of the outer cavity 32 is semicircular, and the inner diameter of the outer cavity 32 is equal to the outer diameter of the pipe to be bent. Two sliding blocks 31 are fixed to the bottom surface of the first arcuate half mold 3, and the two sliding blocks 31 are respectively located on the two side edges of the first arcuate half mold 3; the frame top plate 11 is provided with two sliding grooves 14, which are arranged side by side, and the extension direction of the sliding grooves 14 is the same as the length direction of the frame top plate 11; the two sliding blocks 31 are respectively slidably installed in the two sliding grooves 14, so that the first arcuate half mold 3 is slidably set on the frame top plate 11.

[0048] Reference Figure 3 The drive mechanism 5 is disposed between the first curved mold half 3 and the frame assembly 1. Specifically, the drive mechanism 5 includes a threaded rod 51, a drive motor 52, and a guide rod 53. The guide rod 53 is fixedly mounted on the bottom of the frame top plate 11 and extends through one of the slide blocks 31 to provide guidance. The threaded rod 51 is rotatably mounted on the bottom of the frame top plate 11 and extends through the other slide block 31 and is threadedly connected to it. The drive motor 52 is fixed to the bottom of the frame top plate 11, and the output end of the drive motor 52 is coaxially connected to the threaded rod 51. By controlling the operation of the drive motor 52, the threaded rod 51 can be rotated, thereby forcing the slide block 31 and the first curved mold half 3 to move along the axis of the threaded rod 51. It should be noted that the threaded rod 51 is disposed horizontally between the first curved mold half 3 and the second curved mold half 4, and can drive the first curved mold half 3 to move against the second curved mold half 4.

[0049] Back to Figure 2 The second curved half mold 4 is configured as a C-shape, with the same specific shape as the first curved half mold 3. In this embodiment, the second curved half mold 4 includes two forming mold bases 41, which are mirror images of each other, and each forming mold base 41 is slidably mounted on the surface of the frame top plate 11 via a slide rail 44. It should be noted that the extension direction of the two slide rails 44 is set at an angle, and in this embodiment, the angle is an obtuse angle. The spacing between the two slide rails 44 gradually decreases from the side closest to the first curved half mold 3 to the other side. Based on this, when the two forming mold bases 41 are forced to move away from the first curved half mold 3, the two forming mold bases 41 can approach each other and eventually abut each other, thereby maintaining the second curved half mold 4 on the frame top plate 11.

[0050] It should be noted that to enable the two forming die holders 41 to move synchronously, telescopic rods (not shown) can be installed at the bottom of the two forming die holders 41. The axis of the telescopic rods must be aligned with the width of the frame assembly 1. Furthermore, reset members (not shown) are provided on opposing sides of the two forming die holders 41. These reset members can be magnets or springs that constantly exert a force on the two forming die holders 41, forcing them to move away from each other under normal conditions.

[0051] The inner arc surface of each forming die base 41 is provided with an inner groove 42, which runs through both ends of the forming die base 41 in the arc direction, and the cross-sectional shape of the inner groove 42 is semicircular, and the specific inner diameter size is equal to the outer diameter size of the pipe fitting that needs to be bent; when the two forming die bases 41 move synchronously to a state of mutual contact, the two inner grooves 42 can jointly enclose to form the outer cavity 32 of the second arc-shaped half mold 4.

[0052] Reference Figure 4 The center mold 2 includes a circular base 21, a movable insert 22 and a push mechanism 23. The bottom of the circular base 21 is coaxially fixed with a rotating base 24, and the outer peripheral side of the rotating base 24 is provided with a sliding base 25; Figure 2 The frame top plate 11 is provided with a slide opening 15 , which is located between the two sliding grooves 14 , and the sliding base 25 is slidably installed in the slide opening 15 , so that the center mold 2 is slidably set on the frame top plate 11 .

[0053] Reference Figure 5 The circular base 21 is provided with a plurality of wedge-shaped chutes 211 on its surface. The width of the opening of the wedge-shaped chutes 211 is smaller than the width of the bottom of the chutes. The extension direction of each wedge-shaped chutes 211 is the same as the radial direction of the circular base 21. All wedge-shaped chutes 211 are arranged equidistantly around the central axis of the circular base 21. The number of movable inserts 22 is equal to the number of wedge-shaped chutes 211. Figure 6 The bottom of each movable insert 22 is fixedly connected with a wedge-shaped slider 221, and the shapes of the wedge-shaped slider 221 and the wedge-shaped slide groove 211 are adapted to each other. Through the cooperation between the wedge-shaped slider 221 and the wedge-shaped slide groove 211, the movable insert 22 can be slidably installed on the surface of the circular base 21.

[0054] In addition, back to Figure 5A central groove 212 is coaxially provided on the surface of the circular base 21, and each wedge-shaped slide groove 211 is connected to the central groove 212; based on this, when the movable insert 22 is installed, the wedge-shaped slider 221 can enter the wedge-shaped slide groove 211 through the central groove 212; the circular base 21 is provided with a reset mechanism, which includes a limit plate 27 and a magnetic attraction component 28. The limit plate 27 is coaxially fixed to the bottom wall of the central groove 212, which can play a limiting role, thereby reducing the situation where the wedge slider 221 directly disengages from the wedge slide groove 211 after moving inward.

[0055] Reference Figure 5 、 Figure 6 , the number of magnetic suction components 28 is provided in multiple groups, and the number is equal to the number of wedge-shaped sliders 221; wherein, the magnetic suction component 28 includes a first magnet 281 and a second magnet 282, the first magnet 281 is fixedly embedded in the side of the wedge-shaped slider 221 close to the limit plate 27, and the second magnet 282 is fixedly embedded in the outer peripheral surface of the limit plate 27; in this embodiment, the magnetic poles of the first magnet 281 and the second magnet 282 are opposite, so that there is always a magnetic attraction between the two, and the movable insert 22 can move inward under the action of the magnetic attraction and be completely located inside the outer edge area of ​​the circular base 21, so that each movable insert 22 is gathered together.

[0056] Back to Figure 4 The push mechanism 23 includes a central shaft 231, a push seat 232, a base plate 233, and a linear drive member 234. The central shaft 231 is movably disposed between the circular base 21 and the rotating base 24, and the central shaft 231 and the circular base 21 remain coaxial. The push seat 232 is fixedly connected to the top of the central shaft 231 and is located above the frame top plate 11. The base plate 233 is fixedly connected to the bottom of the central shaft 231 and is located below the frame top plate 11. The linear drive member 234 is configured as a linear cylinder, fixed to the bottom of the rotating base 24, and its movable end is fixedly connected to the base plate 233.

[0057] In this embodiment, the linear drive member 234 is in a normally retracted state, at which point the push seat 232 can be positioned above the movable insert 22. When the movable end of the linear drive member 234 extends outward, the base plate 233, the central shaft 231, and the push seat 232 move downward together, allowing the push seat 232 to enter the center of each movable insert 22 and force each movable insert 22 outward. Ultimately, the wedge-shaped slider 221 can abut against the inner wall of the wedge-shaped chute 211 away from the central groove 212, placing each movable insert 22 in its extreme position. This state is defined as the bending operation state. It is understood that to facilitate the push seat 232 in pushing each movable insert 22 outward, the top edge of the movable insert 22 and the bottom outer edge of the push seat 232 can be provided with inclined guides.

[0058] Reference Figure 5 It should be noted that the upper edge of the circular base 21 is provided with a first concave arc 213, and the lower edge of each movable insert 22 is provided with a second concave arc 222. During the bending operation, the first and second concave arcs 213, 222 together enclose an inner cavity 26. The inner diameter of the inner cavity 26 is equal to the outer diameter of the pipe to be bent. Therefore, when the drive motor 52 drives the first curved half mold 3, the center mold 2, and the second curved half mold 4 to abut against each other, the inner cavity 26 and the two outer cavities 32 together form a molding area with the same shape as the spherical frame.

[0059] In addition, multiple linkages 235 are provided on the outer periphery of the sliding seat 232. All linkages 235 are equidistantly arranged around the central axis of the sliding seat 232, and each linkage 235 is integrally formed with the sliding seat 232. When the movable end of the linear drive member 234 extends outward and the sliding seat 232 moves downward to abut against the limit plate 27, each linkage 235 can fit into the area between two adjacent movable inserts 22, allowing the circular base 21 to rotate with the sliding seat 232, thus achieving a circumferential linkage arrangement between the two. The frame assembly 1 is also provided with an operating mechanism 6, which, by controlling the operating mechanism 6, can force the sliding seat 232 to rotate and drive the circular base 21 to rotate together.

[0060] Specific reference Figure 7 The operating mechanism 6 includes a sliding support 61, an operating handle 62, a first bevel gear 63, and a second bevel gear 64. The sliding support 61 is slidably mounted on the surface of the frame bottom plate 12, and the operating handle 62 is rotatably mounted on the sliding support 61. The first bevel gear 63 is coaxially fixed to the end of the operating handle 62, and the second bevel gear 64 is coaxially fixed to the bottom of the base plate 233. When the movable end of the linear drive member 234 extends outward, the second bevel gear 64 can mesh with the first bevel gear 63 for transmission, and then the operator can rotate the circular base 21 by shaking the operating handle 62. What is required here is that the sliding support 61 is connected to the sliding base 25 through a plurality of connecting columns 611, so that when the sliding base 25 moves, the sliding support 61 can move accordingly, ensuring that the first bevel gear 63 can always remain aligned with the second bevel gear 64.

[0061] Back to Figure 2The first curved mold half 3 has a protruding support portion 33 on its side adjacent to the second curved mold half 4. Two support portions 33 are provided, one on each side edge of the first curved mold half 3. Together, these two support portions 33 form a placement station 34 for pipe fittings. As can be seen, in this embodiment, the placement station 34 is located between the first curved mold half 3 and the center mold 2. It should be noted that each forming mold base 41 has an escape groove 43 on its side adjacent to the first curved mold half 3. The shape of the escape groove 43 matches that of the support portion 33, allowing the support portion 33 to fit within the escape groove 43 when the first curved mold half 3 abuts against the forming mold base 41.

[0062] Back to Figure 1 Two track plates 7 are fixed above the frame top plate 11, located on opposite sides of the placement station 34. Each track plate 7 is provided with a limit rail 71 on the side closest to the other track plate 7. The spacing between the two track plates 7 is equal to the axial length of the pipe to be bent. During the bending operation, the pipe is first placed diagonally and flatly on the placement station 34. The pipe is then rotated so that its ends enter the two limit rails 71, limiting the pipe's movement during the bending operation.

[0063] Reference Figure 3 A spring seat 16 is fixed to the bottom of the frame top plate 11. This seat is located at the bottom of the second curved half-mold 4. A first spring 17 is positioned between the spring seat 16 and the sliding base 25. This first spring 17 consistently exerts an elastic force on the sliding base 25, forcing the sliding base 25 to normally move until it abuts against the inner wall of the slideway opening 15, away from the second curved half-mold 4. This represents the initial reset state. A locking mechanism 8 is also positioned between the sliding base 25 and the frame assembly 1. When the sliding base 25 is in the initial reset state, the locking mechanism 8 restricts the center mold 2 from moving toward the second curved half-mold 4. At this point, the center mold 2 remains relatively stationary, allowing the first curved half-mold 3 to smoothly bend the pipe as it approaches the center mold 2, carrying the pipe.

[0064] The entire process of tube bending can be divided into a first bending operation and a second bending operation. In the first bending operation, the drive motor 52 operates to force the first arcuate half mold 3 to move toward the center mold 2. At this time, the center mold 2 remains fixed under the restriction of the locking mechanism 8, allowing the tube to be smoothly bent into a U shape. After the first arcuate half mold 3 is tightly against the center mold 2, the locking mechanism 8 releases the limiting effect on the center mold 2, and the second bending operation begins. During this stage, the operation of the drive motor 52 can force the first arcuate half mold 3 and the center mold 2 to move toward the second arcuate half mold 4. Ultimately, the first arcuate half mold 3, the center mold 2, and the second arcuate half mold 4 can be brought close to each other to abut against each other, so as to facilitate bending the tube into a circular shape.

[0065] Specific reference Figure 8 The locking mechanism 8 includes a fixed base 81, a hook plate 82 and a torsion spring 83. The fixed base 81 is fixed to the bottom of the frame top plate 11, and the hook plate 82 is rotatably connected to the fixed base 81 through a rotating shaft; the hook plate 82 in this embodiment is partially provided with an abutment portion 822, and the outer wall of the abutment portion 822 is a plane; the torsion spring 83 is arranged between the hook plate 82 and the fixed base 81, and the torsion spring 83 can always generate an elastic force acting on the hook plate 82, thereby forcing the abutment portion 822 of the hook plate 82 to normally abut against the fixed base 81.

[0066] The hook plate 82 is partially provided with a hook opening 821, which faces upward. An extension post 251 is fixed to the side of the sliding base 25. In the initial reset state, the extension post 251 fits within the hook opening 821. When the center mold 2 is forced toward the second arcuate half-mold 4, the extension post 251 abuts against the inner wall of the hook opening 821, thereby restricting the movement of the center mold 2. An integral guide portion 823 is provided on the side of the hook plate 82. In the initial reset state, the guide portion 823 is tilted.

[0067] Also refer to Figure 9 A guide post 311 is provided on the side of the sliding block 31 near the other sliding block 31. The guide post 311 is vertically slidably mounted on the sliding block 31. A second spring 312 is provided between the guide post 311 and the sliding block 31. The second spring 312 can constantly generate an elastic force acting on the guide post 311, thereby forcing the guide post 311 to normally move upward to its limit position. During the first bending operation, the guide portion 823 is located in the movement path of the guide post 311. Since the guide post 311 is at its limit position of upward movement due to the elastic force of the second spring 312, the guide post 311, after contacting the guide portion 823, gradually forces the hook plate 82 to rotate downward, thereby allowing the extension post 251 to smoothly disengage from the hook opening 821, releasing the restraining effect on the extension post 251.

[0068] It is understood that after the bending operation is completed, the sliding base 25 automatically returns to its original position under the elastic force of the first spring 17. The extension post 251 can then abut the end of the hook plate 82, forcing the hook plate 82 to automatically rotate downward, thereby returning the extension post 251 to the hook opening 821. Furthermore, during the return movement of the first curved mold half 3, the guide post 311 can abut the side of the guide portion 823 closer to the second curved mold half 4. At this time, the guide post 311 can compress the second spring 312 and move downward, facilitating the smooth return of the first curved mold half 3 and facilitating the next bending operation.

[0069] Finally, it should be noted that after the first stage of bending operation is completed, the end of the pipe bent into a U shape may be tilted outward, making it difficult to smoothly enter the outer cavity 32 of the second arc-shaped half-mold 4; at this time, the operator can manually turn the operating handle 62, or use an auxiliary tool to knock the operating handle 62 to rotate it, and the cooperation of the first bevel gear 63 and the second bevel gear 64 can be used to rotate the center mold 2, and then the U-shaped pipe can be partially bent again, which helps the end of the U-shaped pipe to smoothly enter the outer cavity 32 of the second arc-shaped half-mold 4.

[0070] The above are preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A pipe bending machine for basketball stand processing, comprising a frame assembly (1) and a bending assembly arranged on the surface of the frame assembly (1); characterized in that: The press-bending assembly comprises a central mold (2), a first arc-shaped half mold (3), a second arc-shaped half mold (4) and a driving mechanism (5), wherein the first arc-shaped half mold (3) and the second arc-shaped half mold (4) are respectively located on two opposite sides of the central mold (2), and an inner cavity (26) is provided on the outer peripheral side of the central mold (2), and the inner arc surface of the first arc-shaped half mold (3) and the inner arc surface of the second arc-shaped half mold (4) are both provided with an outer cavity (32); the driving mechanism (5) is used to drive the first arc-shaped half mold (3), the second arc-shaped half mold (4) and the central mold (2) to move closer to each other until they are in contact with each other, at which time a molding area adapted to the shape of the ball frame is formed between the inner cavity (26) and the two outer cavities (32); The central mold (2) comprises a circular base (21), a plurality of movable inserts (22) slidably arranged on the surface of the circular base (21), and a pushing mechanism (23) for forcing each movable insert (22) to move outward, all movable inserts (22) are arranged at intervals around the central axis of the circular base (21), and the moving direction of each movable insert (22) is the same as the radial direction of the circular base (21); The upper edge of the circular base (21) is provided with a first concave arc (213), and the lower edge of each movable insert (22) is provided with a second concave arc (222). In the bending operation state, the pushing mechanism (23) can force each movable insert (22) to move outward to the extreme position. At this time, the first concave arc (213) and each second concave arc (222) together enclose the inner cavity (26); the circular base (21) is also provided with a reset mechanism. When the pushing mechanism (23) is separated from the movable insert (22), the reset mechanism can force each movable insert (22) to move inward and gather together. The second arc-shaped half mold (4) is fixedly arranged on the frame assembly (1), the first arc-shaped half mold (3) and the center mold (2) are both slidably arranged on the frame assembly (1), and a placement station (34) for placing pipe fittings is provided between the first arc-shaped half mold (3) and the center mold (2); a locking mechanism (8) is provided between the center mold (2) and the frame assembly (1), and the locking mechanism (8) is used to limit the center mold (2) from moving in a direction close to the second arc-shaped half mold (4); The driving mechanism (5) is arranged between the first arc-shaped half mold (3) and the frame assembly (1). In the first stage of the bending operation, the driving mechanism (5) forces the first arc-shaped half mold (3) to approach the center mold (2). At this time, the center mold (2) is kept in position by the locking mechanism (8); in the second stage of the bending operation, the first arc-shaped half mold (3) is pressed against the center mold (2), forcing the locking mechanism (8) to be unlocked. At this time, the first arc-shaped half mold (3) pushes the center mold (2) to move in the direction close to the second arc-shaped half mold (4), so as to realize that the first arc-shaped half mold (3), the center mold (2) and the second arc-shaped half mold (4) are brought close to each other until they are in contact with each other.

2. The pipe bending machine according to claim 1, characterized in that: The first arc-shaped half mold (3) is provided with a support portion (33) protruding from the side surface close to the second arc-shaped half mold (4), and the support portions (33) are provided with two and are respectively arranged on the two side edges of the first arc-shaped half mold (3), and the two support portions (33) together form a placement station (34); the frame assembly (1) is fixedly provided with two track plates (7), and the two track plates (7) are respectively located on two opposite sides of the placement station (34), and the spacing between the two track plates (7) matches the axial length of the pipe.

3. The pipe bending machine according to claim 1, characterized in that: A sliding base (25) is fixed at the bottom of the center mold (2), and the center mold (2) is slidingly connected to the frame assembly (1) through the sliding base (25); an extension column (251) is fixed on the side of the sliding base (25); The locking mechanism (8) includes a fixed base (81), a hook-shaped plate (82) rotatably connected to the fixed base (81), and a torsion spring (83) arranged between the hook-shaped plate (82) and the fixed base (81); the hook-shaped plate (82) is provided with a hooking opening (821) that cooperates with the extension column (251); in the first stage of the bending operation, the extension column (251) cooperates with the hooking opening (821) to limit the position; The torsion spring (83) is used to force the contact portion (822) to rotate in a direction close to the fixed base (81) in a normal state. At this time, the hook plate (82) is located on the moving path of the extension column (251), and when the central mold (2) moves and resets, the extension column (251) can contact the hook plate (82) and force the hook plate (82) to rotate in a direction away from the fixed base (81).

4. The pipe bending machine according to claim 3, characterized in that: A guide portion (823) is provided on the side of the hook plate (82), and the guide portion (823) is normally inclined; a guide column (311) is provided on the outside of the first arc-shaped half mold (3), and the guide column (311) is arranged along the moving direction of the first arc-shaped half mold (3) and opposite to the guide portion (823). After the first bending operation, the guide column (311) can abut against the guide portion (823) and force the hook plate (82) to rotate in a direction away from the fixed base (81), so as to realize the smooth separation of the extension column (251) from the hooking opening (821).

5. The pipe bending machine according to claim 1, characterized in that: The pushing mechanism (23) comprises a central shaft (231), a pushing seat (232) and a base plate (233); the central shaft (231) is movably arranged in the circular base (21) and is coaxial with the circular base (21); the pushing seat (232) is fixedly connected to the top end of the central shaft (231) and is located above the circular base (21); the base plate (233) is fixedly connected to the bottom end of the central shaft (231) and is located below the circular base (21); a linear driving member (234) is provided between the base plate (233) and the circular base (21); when the linear driving member (234) is in motion, the pushing seat (232) enters the middle of each movable insert (22) and forces each movable insert (22) to move outward.

6. The pipe bending machine according to claim 5, characterized in that: A rotating seat (24) is fixed to the bottom of the circular base (21), a sliding base (25) is provided on the outer peripheral side of the rotating seat (24), and the central mold (2) is slidingly connected to the frame assembly (1) via the sliding base (25); the fixed end of the linear drive member (234) is fixed to the rotating seat (24) to achieve circumferential linkage between the linear drive member (234) and the circular base (21); A plurality of linkage parts (235) are provided on the outer peripheral side of the push seat (232). When the linear drive member (234) is in motion, the linkage parts (235) are matched and clamped in the area between two adjacent movable inserts (22) to achieve circumferential linkage between the push seat (232) and the circular base (21); an operating mechanism (6) for forcing the circular base (21) to rotate is also provided at the bottom of the frame assembly (1).

7. The pipe bending machine according to claim 6, characterized in that: The operating mechanism (6) comprises a sliding support (61) slidably mounted on the frame assembly (1), an operating handle (62) rotatably mounted on the sliding support (61), a first bevel gear (63) fixedly connected to the end of the operating handle (62), and a second bevel gear (64) fixed to the bottom of the base plate (233); the sliding support (61) is connected to the sliding base (25); when the driving mechanism (5) is actuated, the second bevel gear (64) moves in a direction close to the first bevel gear (63) and finally meshes with the first bevel gear (63) for transmission.

8. The pipe bending machine according to claim 1, characterized in that: The second arc-shaped half mold (4) includes two molding mold bases (41) arranged in a mirror image, and the inner arc side of each molding mold base (41) is provided with an inner groove (42); wherein, the molding mold base (41) is slidably connected to the frame assembly (1), and the moving directions of the two molding mold bases (41) are set at an angle. When the central mold (2) abuts against the two molding mold bases (41) and forces the two molding mold bases (41) to move, the two molding mold bases (41) can approach each other to an abutting state, and at this time, the two inner grooves (42) jointly form the outer cavity (32).

9. The pipe bending machine according to claim 1, characterized in that: The circular base (21) is provided with a plurality of wedge-shaped chutes (211) on its surface, and the extension direction of the wedge-shaped chutes (211) is the same as the radial direction of the circular base (21); the bottom of each movable insert (22) is provided with a wedge-shaped slider (221), and the wedge-shaped slider (221) is slidably installed inside the wedge-shaped chutes (211); The reset mechanism includes a limit plate (27) and a magnetic assembly (28). The limit plate (27) is fixed to the surface of the circular base (21) and is located inside each wedge-shaped slide groove (211). The number of the magnetic assemblies (28) matches the number of the wedge-shaped sliders (221). Each of the magnetic assemblies (28) includes a first magnet (281) fixedly embedded in the wedge-shaped slider (221) and a second magnet (282) fixedly embedded in the limit plate (27). The magnetic poles of the first magnet (281) and the second magnet (282) are opposite.

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