Tube bending machine

Abstract

The present application discloses a pipe bending machine, comprising: a driving mechanism, the driving mechanism comprising a support platform and a first driving member, the first driving member being capable of driving the support platform to move; a bending die, the bending die being arranged on the support platform, the bending die being capable of moving synchronously with the support platform, the bending die being provided with a processing hole, the inner wall surface of the processing hole being an arc-shaped surface curved in the direction of the central axis of the processing hole; a feeding assembly, the feeding assembly being arranged on one side of the bending die, the feeding assembly comprising a second bracket, a storage member and a pipe pushing member, the storage member and the pipe pushing member being arranged on the second bracket, the storage member defining a storage chamber, the storage chamber being used to store pipes to be processed, the pipe pushing member being movable between the storage chamber and the bending die to transport one end of the pipe along its axial direction to the processing hole. The present application not only achieves the bending of pipes but also improves the degree of automation by adopting the coordination of the driving mechanism, the bending die and the feeding mechanism.

Description

Technical Field

[0001] The present application belongs to the field of mechanical processing technology, and specifically relates to a pipe bending machine. Background Art

[0002] Three-dimensional hollow curved pipe fittings are widely used in military and civilian industries such as petrochemicals, aerospace, and nuclear power. Hollow pipe fittings serve as piping and connectors for various hydraulic and pneumatic systems, fuel systems, and more. In recent years, with the rapid development of emerging industries such as new energy vehicles, products are becoming smaller and more compact, placing higher demands on the forming capabilities and precision of bending forming mechanisms. Traditional pipe processing methods such as bending, push bending, and roll bending are no longer able to meet these new processing requirements. Summary of the Invention

[0003] The present application aims to provide a tube bending machine that at least solves one of the problems of the background technology.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] In the first aspect, an embodiment of the present application proposes a pipe bending machine, comprising: a driving mechanism, the driving mechanism comprising a support platform and a first driving member, the first driving member being capable of driving the support platform to move; a bending die, the bending die being arranged on the support platform, the bending die being capable of moving synchronously with the support platform, a processing hole being provided on the bending die, the inner wall surface of the processing hole being an arc-shaped surface curved in the direction of the central axis of the processing hole; a feeding assembly, the feeding assembly being arranged on one side of the bending die, the feeding assembly comprising a second bracket, a storage member and a pipe pushing member, the storage member and the pipe pushing member being arranged on the second bracket, a storage chamber being defined in the storage member, the storage chamber being used to store the pipe to be processed, the pipe pushing member being movable between the storage chamber and the bending die to transport the pipe along one axial end thereof to the processing hole.

[0006] Optionally, the feeding assembly also includes a clamping assembly, which is arranged on the second bracket, and the clamping assembly includes: a first positioning block, which is located between the storage chamber and the bending mold; a second positioning block, which is located on one side of the first positioning block, and a through hole is formed between the second positioning block and the first positioning block, and the through hole is respectively connected to the processing hole and the storage chamber to pass through the pipe.

[0007] Optionally, the second positioning block is located above the first positioning block.

[0008] Optionally, a V-shaped groove is provided on one side of the first positioning block and the second positioning block that are opposite to each other, and the V-shaped groove of the first positioning block and the V-shaped groove of the second positioning block cooperate to form the through hole.

[0009] Optionally, the clamping assembly further includes: a clamping block, a first end of which is disposed on the second positioning block; and a cylinder connected to the second end of the clamping block to apply a force to the second positioning block through the clamping block.

[0010] Optionally, the clamping assembly further includes: a first transmission member, the first transmission member is connected to the cylinder, and the first transmission member is arranged parallel to the clamping block; and a second transmission member, the second transmission member is respectively connected to the first transmission member and the clamping block.

[0011] Optionally, the clamping assembly further includes: a lever arm, a first end of the lever arm is connected to the cylinder, and a second end of the lever arm is sleeved on the outer periphery of the first transmission member.

[0012] Optionally, the tube pushing member includes: a pushing block, which is arranged on the bracket and located between the through hole and the storage chamber, and the pushing block is detachably connected to the tube between the through hole and the storage chamber; and a second driving member, which is arranged on the bracket and connected to the pushing block to drive the pushing block to move between the through hole and the storage chamber.

[0013] Optionally, the tube pushing member further comprises: a tube feeding member, a first end of which is detachably connected to the tube between the through hole and the storage chamber, and a second end of which is connected to the pushing block.

[0014] Optionally, a portion of the pipe delivery member along its axial direction extends into the through hole.

[0015] In the embodiment of the present application, the tube bending forming machine according to the embodiment of the present application adopts a device combining a driving mechanism and a bending die, which not only can realize the bending of the tube, but also has the advantage of a high degree of automation.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 is a structural schematic diagram of a tube bending machine according to an embodiment of the present application;

[0019] Figure 2 1 is a structural schematic diagram of a feeding assembly of a tube bending machine according to an embodiment of the present application;

[0020] Figure 3 yes Figure 2 An enlarged view of the circled section A;

[0021] Figure 4 yes Figure 2 Schematic diagram of the internal structure of part B circled in the middle.

[0022] Reference numerals:

[0023] Tube bending machine 100;

[0024] Driving mechanism 10; supporting platform 11; first driving member 12;

[0025] Bending die 20; processing hole 21;

[0026] Feeding assembly 30; bracket 31;

[0027] Clamping assembly 40; first positioning block 41; second positioning block 42; V-shaped groove 43; clamping block 44; through hole 45;

[0028] Cylinder 50; first transmission member 51; second transmission member 52; lever arm 53;

[0029] Tube pushing member 60; pushing block 61; second driving member 62; tube feeding member 63;

[0030] Guide member 70;

[0031] Pipe 200. DETAILED DESCRIPTION

[0032] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of this application.

[0033] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. Furthermore, the term "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] The following describes the tube bending machine 100 according to an embodiment of the present application with reference to the accompanying drawings.

[0037] like Figures 1 to 4 As shown, the tube bending machine 100 according to an embodiment of the present application includes a driving mechanism 10 and a bending die 20 .

[0038] Specifically, the driving mechanism 10 includes a support platform 11 and a first driving member 12. The first driving member 12 can drive the support platform 11 to move. The bending die 20 is provided on the support platform 11 and can move synchronously with the support platform 11. The bending die 20 is provided with a processing hole 21. The inner wall surface of the processing hole 21 is an arc-shaped surface that bends in the direction of the central axis of the processing hole 21. The feeding assembly 30 is provided on one side of the bending die 20. The feeding assembly 30 includes a bracket 31, a storage member, and a pipe pushing member 60. The storage member and the pipe pushing member 60 are provided on the bracket 31. The storage member defines a storage chamber for storing the pipe 200 to be processed. The pipe pushing member 60 is movable between the storage chamber and the bending die 20 to transport the pipe 200 along one end of its axial direction to the processing hole 21.

[0039] In other words, the tube bending machine according to the embodiment of the present application is mainly composed of a driving mechanism 10 and a bending die 20. The driving mechanism 10 is mainly composed of a support platform 11 and a first driving member 12. The first driving member 12 is connected to the support platform 11, and the support platform 11 can be driven to move by the first driving member 12. A bending die 20 is provided on the support platform 11, and the support platform 11 moves synchronously with the bending die 20, that is, when the support platform 11 moves, the bending die 20 can also move. A processing hole 21 is provided on the bending die 20, and the inner wall surface of the processing hole 21 is an arc-shaped surface. For example, the bending die 20 is a disc, and the processing hole 21 is designed at the center position of the bending die 20. The inner wall surface of the processing hole 21 is an arc-shaped surface bent toward the center position of the bending die 20. When the bending die 20 rotates, the pipe 200 located in the processing hole 21 can be bent.

[0040] A feeding assembly 30 is provided on one side of the bending die 20. This assembly delivers the pipe 200 to be bent into the machining hole 21 of the bending die 20. Specifically, the feeding assembly 30 primarily consists of a support 31, a storage member, and a pipe pusher 60. The support 31 primarily serves as a support, with the storage member and pipe pusher 60 mounted on it. The storage member defines a storage chamber within which the pipe 200 to be machined is placed. The pipe pusher 60 also functions as a conveyor, transporting the pipe 200 from the storage chamber to the machining hole 21.

[0041] Optionally, the support platform 11 is provided with a mounting hole, into which the bending die 20 is positioned, facilitating the rotation of the bending die 20. The drive mechanism 10 includes a motion platform, a first side of which is connected to the support platform 11, and a second side of which is connected to a first drive member 12. The first drive member 12 includes a plurality of electric push rods, each with an output end hinged to the motion platform.

[0042] It should be noted that the forming motion of the tube 200 can be divided into eccentric motion of the center of the bending die 20 in the XY plane and uniform feed motion along the Z axis (feed assembly 30). The motion of the bending die 20 ensures the processing accuracy of the tube 200. By mounting the bending die on a six-axis parallel robot motion platform, high-precision motion control of the bending die 20 is achieved. The uniform feed motion of the feed assembly 30 is a linear reciprocating motion.

[0043] Therefore, according to the tube bending machine 100 of the embodiment of the present application, by adopting a device combining the driving mechanism 10 and the bending die 20, it is not only possible to achieve bending of the tube 200, but also has the advantage of a high degree of automation.

[0044] According to one embodiment of the present application, the feeding assembly 30 also includes a clamping assembly 40, which is arranged on the bracket 31. The clamping assembly 40 includes a first positioning block 41 and a second positioning block 42. The first positioning block 41 is located between the storage chamber and the bending mold 20, and the second positioning block 42 is located on one side of the first positioning block 41. A through hole 45 is formed between the second positioning block 42 and the first positioning block 41. The through hole 45 is respectively connected to the processing hole 21 and the storage chamber to pass through the pipe 200.

[0045] That is to say, a through hole 45 is formed by the cooperation of the first positioning block 41 and the second positioning block 42, and one end of the tube 200 in the storage chamber passes through the through hole 45 to reach the processing hole 21, which can not only guide the tube 200, but also position the tube 200. During the processing of the bending die 20, the clamping assembly 40 can fix the remaining parts of the tube 200 to prevent the movement of the tube 200 from affecting the bending effect.

[0046] In some specific embodiments of the present application, the second positioning block 42 is located above the first positioning block 41. In other words, the second positioning block 42 and the first positioning block 41 are distributed in the vertical direction, which facilitates controlling the spacing between the first positioning block 41 and the second positioning block 42, and controlling the radial size of the through hole 45, thereby achieving adaptability to pipes 200 of different clamping degrees and sizes.

[0047] According to one embodiment of the present application, Figure 3 As shown, the first and second positioning blocks 41, 42 are each provided with a V-shaped groove 43 on one side of the opposing block. The V-shaped groove 43 of the first positioning block 41 and the V-shaped groove 43 of the second positioning block 42 cooperate to form a through hole 45. For example, the second positioning block 42 is positioned above the first positioning block 41 and is provided with an inverted V-shaped groove 43. The V-shaped groove 43 on the second positioning block 42 opens downward, while the V-shaped groove 43 on the first positioning block 41 opens upward. It should be noted that the inner wall of the V-shaped groove 43 is a straight surface. By using this straight surface to contact the curved surface of the pipe 200, the clamping effect on the pipe 200 can be enhanced. Before processing, the unprocessed pipe 200 is placed in the V-shaped groove 43 of the first positioning block 41, and then the second positioning block 42 is pressed down to clamp the pipe 200.

[0048] In some specific embodiments of the present application, the clamping assembly 40 further includes: a clamping block 44 and a cylinder 50. The first end of the clamping block 44 is disposed on the second positioning block 42, and the cylinder 50 is connected to the second end of the clamping block 44 so as to apply a force to the second positioning block 42 through the clamping block 44. In other words, the cylinder 50 applies a force to the clamping block 44, and the clamping block 44 applies a force to the second positioning block 42. By using the clamping block 44 to transmit the force, problems such as uneven force application, difficulty in placing the cylinder 50, and the large space occupied by the cylinder 50 that may be caused by directly applying force to the second positioning block 42 through the cylinder 50 are avoided. When the pipe 200 is advanced for processing, the lever force of the cylinder 50 can effectively resist the radial force generated by the bending of the pipe 200. After a processing cycle is completed, the pipe 200 can be removed, the lever force of the cylinder 50 is unloaded, and the next working cycle can begin.

[0049] According to one embodiment of the present application, the clamping assembly 40 further includes a first transmission member 51 and a second transmission member 52. The first transmission member 51 is connected to the cylinder 50 and is disposed parallel to the clamping block 44. The second transmission member 52 is connected to the first transmission member 51 and the clamping block 44, respectively. Specifically, the first transmission member 51 and the clamping block 44 are disposed parallel to the through hole 45, which is located below the clamping block 44. The first transmission member 51 is located on one side of the clamping block 44, and the second transmission member 52 connects the first transmission member 51 and the clamping block 44. When the cylinder 50 applies a downward force to the first transmission member 51, the first transmission member 51 applies a downward force to the clamping block 44 via the second transmission member 52, thereby clamping the tubular 200 located in the through hole 45. In this embodiment, the combination of the first transmission member 51 and the second transmission member 52 allows the cylinder 50 to extend vertically without occupying excessive horizontal space.

[0050] In some specific embodiments of the present application, the clamping assembly 40 further includes a lever arm 53, a first end of which is connected to the cylinder 50, and a second end of which is sleeved around the outer periphery of the first transmission member 51. The lever arm 53 may be a bent member with a downward opening, with the upper end of the lever arm 53 connected to the cylinder 50 and the lower end of the lever arm 53 sleeved around the first transmission member 51. In this embodiment, the use of the lever arm 53 not only facilitates the placement of the cylinder 50, preventing the cylinder 50 from occupying excessive horizontal space and facilitating the application of force by the vertically positioned cylinder 50, but also utilizes the principle of leverage to apply both a downward force and an upward force to the tubular material 200 in the through hole 45. For example, when the output shaft of the cylinder 50 is lifted upward to a certain extent, the lower end of the lever arm 53 rotates around the outer periphery of the first transmission member 51, causing the first transmission member 51 to move upward under the action of the lever arm 53.

[0051] According to one embodiment of the present application, the tube pusher 60 includes a pusher block 61 and a second drive member 62. The pusher block 61 is disposed on the bracket 31 and located between the through hole 45 and the storage chamber. The pusher block 61 is detachably connected to the tube 200 between the through hole 45 and the storage chamber. The second drive member 62 is disposed on the bracket 31 and connected to the pusher block 61 to drive the pusher block 61 to move between the through hole 45 and the storage chamber. Through the cooperation between the pusher block 61 and the second drive member 62, the pusher block 61 can move back and forth between the through hole 45 and the storage chamber, thereby driving the tube from the storage chamber to the through hole 45, and then along the through hole 45 to the bending die 20. The second drive member 62 may include a Z-axis servo motor and a lead screw to ensure uniform reciprocating feeding. It should also be noted that the tube 200 can be fed out of the storage chamber by cooperating with a tube clamp and rollers, thereby achieving a loading operation and subsequently performing a feeding operation.

[0052] In some specific embodiments of this application, such as Figure 4 As shown, the tube pusher 60 further includes a tube feeder 63. A first end of the tube feeder 63 is detachably connected to the tubing 200 between the through-hole 45 and the storage chamber, and a second end of the tube feeder 63 is connected to the pusher block 61. The provision of the tube feeder 63 facilitates the miniaturization of the pusher block 61 and facilitates its flexible movement. The tube feeder 63 may include an upper clamp and a lower clamp, both of which switch back and forth between a clamped and released state, and cooperate with the second drive member 62 and the pusher block 61 to achieve the feeding of the tubing 200.

[0053] According to one embodiment of the present application, a portion of the pipe delivery member 63 along its axial direction extends into the through hole 45. By arranging a portion of the pipe delivery member 63 in the through hole 45, it is convenient to deliver the pipe 200 into the through hole 45, eliminating the step of aligning the pipe 200 with the through hole 45.

[0054] According to one embodiment of the present application, the tube bending forming machine 100 further includes a guide member 70, which is provided in the through hole 45. The tube 200 to be processed is a hollow member, and the guide member 70 is also a hollow member. The radial dimension of the guide member 70 is larger than the radial dimension of the tube groove 200, and the tube 200 is inserted into the interior of the guide member 70. By adopting the guide member 70, it is possible to ensure that the tube 200 is fed along the Z axis on the guide member 70. In addition, it should be noted that, unlike the CNC bending tube bending machine, the tube bending forming machine 100 of the present application is a vector tube bending machine, which needs to achieve uniform feeding of the tube 200. The axial force provided by the mechanism during the propulsion process can improve the bending stress generated when the tube 200 is bent, thereby improving the forming quality of the tube 200. Therefore, adding a guide member 70 inside the tube blank (the tube 200 before processing) can avoid cross-sectional distortion, surface wrinkling, and other phenomena generated during bending.

[0055] That is to say, the pipe bending machine 100 of the present application is different from the traditional bending machine. The pipe bending machine 100 of the present application does not need to be clamped in each bending action. The pipe 200 is subjected to the axial force P of the feeding assembly 30. L The bending die 20 mounted on the driving mechanism 10 moves in the XY plane under the drive of the driving mechanism 10, generating a force P perpendicular to the axial direction of the pipe 200. u The distance between the geometric center of the bending die 20 and the guide mechanism is called the deformation zone length A. When the bending die performs eccentric motion in the XY plane, the relative distance between its center and the axis of the guide mechanism is called the bending die eccentricity U. During the bending process, the guide distance A is generally fixed, while the eccentricity U determines the resulting tube radius R. The relationship between the tube radius R and the A and U values ​​is shown in the following formula.

[0056]

[0057] The relationship between the loading bending moment M of the tube 200 during the bending process and the guide distance A, the eccentricity U, the axial force and the eccentric force is shown in the following formula.

[0058] M=P u A+P L U

[0059] In some specific embodiments of the present application, the tube bending machine 100 also includes a host computer, which is composed of parameter setting, process analysis, manual / automatic processing and system monitoring parts. The software of the host computer is written in C++ language, and the graphical interface and functional modules are developed based on the Visual Studio 2015+Qt5.10.1 platform. The present application adopts the Gohigh GSN-024-V-00 high-performance 24-axis Glink-II bus motion control card, which can control a maximum of 24 axes and uses Gohigh's self-developed Glink-II bus for data transmission between devices. The first driver of the present application is Tamagawa Electric TSM1308, and the second driver is Gohigh's Servo series servo driver GSHD-013-2A-GL2. The development of motion control is completed by calling the various instructions in the dynamic link library (.dll) and static link library (.lib) of the GSN series motion control card.

[0060] Parameter settings include machine parameters and process parameters. Machine parameters are saved in the program directory by default and can be modified using specialized debugging software. Process parameters include axis motion parameters, tube forming parameters, and tube spatial coordinate parameters. After the host computer reads the process parameters, the process analyzer generates the motion parameters for each axis and pushes them into the processing buffer. Processing methods are divided into manual and automatic. The manual mode includes return to zero and jog motion, which is suitable for machine debugging and maintenance. The automatic mode uses PT and PVT modes and is responsible for executing the processing motion parameters pushed into the data buffer during processing.

[0061] The system monitoring module includes three parts: IO monitoring, position monitoring, and axis status alarm. IO monitoring queries the interface data output status in the form of a bus; position monitoring reads the data of the absolute encoder installed on each axis to calculate the axis movement distance; the axis status alarm detects the return value of the function to monitor problems such as position out-of-limit, overvoltage, and overcurrent.

[0062] In summary, the tube bending machine 100 according to the embodiment of the present application can not only realize three-dimensional vector bending of the tube 200, but also improve the degree of automation of production and processing.

[0063] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] 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 the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A pipe bending machine, characterized in that: include: A driving mechanism, the driving mechanism comprising a support platform, a first driving member and a moving platform, the first driving member being capable of driving the support platform to move, a first side of the moving platform being connected to the support platform, a second side of the moving platform being connected to the first driving member, the first driving member comprising a plurality of electric push rods, an output end of each electric push rod being hinged to the moving platform; A bending die, the bending die being arranged on the support platform and being capable of moving synchronously with the support platform, the bending die being provided with a processing hole, the inner wall surface of the processing hole being an arc-shaped surface curved toward the direction of the central axis of the processing hole; A feeding assembly is provided on one side of the bending die, and includes a second bracket, a storage member, and a pipe pushing member. The storage member and the pipe pushing member are provided on the second bracket. A storage chamber is defined in the storage member, and the storage chamber is used to store the pipe to be processed. The pipe pushing member is movable between the storage chamber and the bending die to transport the pipe along one axial end thereof to the processing hole. The feeding assembly further includes a clamping assembly, which is provided on the second bracket and includes: a first positioning block, the first positioning block being located between the storage chamber and the bending die; a second positioning block, the second positioning block being located on one side of the first positioning block, wherein a through hole is formed between the second positioning block and the first positioning block, the through hole being respectively connected to the processing hole and the storage chamber so as to pass the pipe; The pipe bending machine further includes a guide member, which is arranged in the through hole. The guide member is a hollow member. The radial dimension of the guide member is larger than the radial dimension of the pipe. The pipe is inserted into the interior of the guide member.

2. The tube bending machine according to claim 1, characterized in that The second positioning block is located above the first positioning block.

3. The tube bending machine according to claim 1, characterized in that A V-shaped groove is provided on one side of the first positioning block and the second positioning block that are opposite to each other. The V-shaped groove of the first positioning block and the V-shaped groove of the second positioning block cooperate to form the through hole.

4. The tube bending machine according to claim 2, characterized in that: The clamping assembly further comprises: a clamping block, wherein a first end of the clamping block is disposed on the second positioning block; A cylinder is connected to the second end of the clamping block to apply a force to the second positioning block through the clamping block.

5. The tube bending machine according to claim 4, characterized in that: The clamping assembly further comprises: a first transmission member, the first transmission member being connected to the cylinder and arranged parallel to the clamping block; A second transmission member is connected to the first transmission member and the clamping block respectively.

6. The tube bending machine according to claim 5, characterized in that: The clamping assembly further comprises: A lever arm, wherein a first end of the lever arm is connected to the cylinder, and a second end of the lever arm is sleeved on the outer periphery of the first transmission member.

7. The tube bending machine according to claim 1, characterized in that The pipe pushing member comprises: a propulsion block, the propulsion block being provided on the bracket and located between the through hole and the storage chamber, the propulsion block being detachably connected to the pipe between the through hole and the storage chamber; A second driving member is provided on the bracket and connected to the propulsion block, so as to drive the propulsion block to move between the through hole and the storage chamber.

8. The tube bending machine according to claim 7, characterized in that: The push pipe member also includes: A pipe delivery member, wherein a first end of the pipe delivery member is detachably connected to the pipe between the through hole and the storage chamber, and a second end of the pipe delivery member is connected to the propulsion block.

9. The tube bending machine according to claim 8, characterized in that: A portion of the pipe delivery member along its axial direction extends into the through hole.

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