Feeding mechanism of a tube end forming machine

Abstract

The present invention discloses a feeding mechanism for a tube end forming machine, belonging to the field of feeding equipment for tube end forming machines. The feeding mechanism is used for feeding bent tubes on the tube end forming machine, and includes a workbench, a feeding slide seat, a feeding drive assembly, and a clamping feeding assembly. The workbench has a feeding channel, the feeding slide seat is slidably installed in the feeding channel, the feeding drive assembly is fixed to the workbench, and the clamping feeding assembly includes an upper clamping block, a lower clamping block, and a clamping drive member. The upper clamping block has an upper clamping groove, and the lower clamping block has a lower clamping groove. The present invention enables the bent tube to move toward or away from the tube end forming machine through the cooperation of the clamping feeding assembly and the feeding slide seat, and can also rotate the bent tube horizontally, thereby realizing the loading and unloading of the bent tube, reducing the loading and unloading time of the bent tube, improving the loading and unloading efficiency of the bent tube, and reducing the production cost of the bent tube.

Description

Technical Field

[0001] The invention relates to the technical field of feeding equipment of a pipe end forming machine, in particular to a feeding mechanism of a pipe end forming machine. Background Art

[0002] The pipe end forming machine is a processing and forming equipment for expanding, shrinking and reducing the pipe fittings.

[0003] In existing pipe bending equipment, after expansion and forming, the pipe must be moved to the next process, where its shape is photographed and inspected, and the pipe must be rotated from a vertical to a horizontal position. Existing feeding equipment typically unloads and moves the material through a robot clamping system. While this method of movement is feasible, it increases the robot's loading time, affecting the forming efficiency and increasing the manufacturing cost of the pipe. Summary of the Invention

[0004] The object of the present invention is to provide a feeding mechanism for a tube end forming machine, so as to solve the problem in the background art mentioned above that the bent tubes take up the loading time when being unloaded.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] A feeding mechanism of a tube end forming machine, which is used for feeding bent tubes on the tube end forming machine, comprises a workbench with a feeding channel toward or away from the tube end forming machine; a feeding slide seat, which is slidably mounted in the feeding channel and can move toward or away from the tube end forming machine; a feeding drive assembly, which is fixed to the workbench and is connected to the feeding slide seat for driving the feeding slide seat to move toward or away from the tube end forming machine; a clamping feeding assembly, which comprises an upper clamping block, a lower clamping block and a clamping drive member, wherein the upper clamping block is detachably fixed to the feeding slide seat toward Towards one end of the tube end forming machine, the lower clamping block is fixed to the feeding sliding seat toward one end of the tube end forming machine by a sliding connection, the upper clamping block has an upper clamping groove, the lower clamping block has a lower clamping groove, the clamping drive is fixed on the feeding sliding seat, the clamping drive is driven and connected to the lower clamping block, the clamping drive is used to drive the lower clamping block to move toward or away from the upper clamping block, when the lower clamping block conflicts with the upper clamping block, the upper clamping groove and the lower clamping groove combine to clamp the clamping part of the bent pipe.

[0007] Preferably, a limiting ring is rotatably installed in the lower clamping groove and rotates in coincidence with the center line of the lower clamping groove. A limiting drive assembly is installed on the lower clamping block. The limiting drive assembly is drivingly connected to the limiting ring and is used to drive the limiting ring to rotate. The limiting ring has at least a first state and a second state. When the limiting ring is in the first state, the limiting ring is located in the lower clamping groove, and the lower clamping groove is open; when the limiting ring is in the second state, part of the limiting ring extends out of the lower clamping groove, so that the limiting ring and the lower clamping groove are combined to form an arc-shaped limiting portion.

[0008] Preferably, the limit drive assembly includes a limit motor and a limit gear, a lower accommodating groove is opened in the lower clamping block, and the limit gear is installed in the lower accommodating groove by a rotating connection. The limit motor is fixed to the end of the lower clamping block facing away from the tube end forming machine, and the output shaft of the limit motor is drive-connected to the limit gear. A plurality of limit drive grooves are opened on the outer wall of the limit ring, and part of the limit gear extends to the lower clamping groove and engages with the limit drive groove.

[0009] Preferably, the limit drive assembly also includes a limit push rod, a limit spring and a first magnetic unit. The limit push rod is installed in the lower accommodating groove by a sliding connection. The limit spring is sleeved on the outer wall of the limit push rod and pushes one end of the limit push rod to move toward the direction of the limit gear. The other end of the limit push rod is fixed with a first ferromagnetic block. The first magnetic unit is fixed on the lower clamping block. The first magnetic unit can generate magnetic force, so that the first ferromagnetic block drives the limit push rod to move in the direction away from the limit gear.

[0010] Preferably, the feeding mechanism also includes a flipping assembly, which is fixedly mounted on the feeding sliding seat. The flipping assembly has a rotatable flipping driving end. When the limiting ring is in the second state, the flipping driving end drives the bent pipe to rotate to a set angle along the center line of the arc-shaped positioning portion.

[0011] Preferably, the flipping assembly includes an arc-shaped guide rail, a flipping motor, a flipping gear and several guide wheel groups. The guide wheel groups are all fixed on the feeding sliding seat and combined to form an arc-shaped channel. The arc-shaped guide rail is slidably installed in the arc-shaped channel and can slide along the arc-shaped channel. The flipping motor is fixed on the feeding sliding seat. The flipping gear is fixed to the output shaft of the flipping motor. Several flipping grooves are opened on the outer wall of the arc-shaped guide rail. The flipping gear is engaged with the flipping groove. The flipping drive end is fixedly connected to the arc-shaped guide rail.

[0012] Preferably, the feeding mechanism further comprises a conveying assembly, the conveying assembly is fixed to the upper end of the workbench, and the conveying assembly is located at one end of the feeding channel away from the tube end forming machine.

[0013] Preferably, the feeding mechanism also includes a clamping mechanism, which includes an upper clamping bracket and a lower clamping bracket, the upper clamping bracket is installed on the feeding sliding seat by a rotating connection, the upper clamping bracket is provided with an upper clamping groove, and a first telescopic member is fixedly installed on the upper clamping bracket by a rotating connection, the end of the first telescopic member is fixed to the feeding sliding seat by a rotating connection, and is used to drive the upper clamping bracket to rotate, the lower clamping bracket is installed on the feeding sliding seat by a sliding connection, the lower clamping bracket is provided with a lower clamping groove, and a second telescopic member is provided below the lower clamping bracket, the second telescopic member is fixed to the feeding sliding seat, the telescopic end of the second telescopic member is fixedly connected to the lower clamping bracket, and is used to drive the vertical movement of the lower clamping bracket.

[0014] Preferably, the clamping mechanism further includes a second ferromagnetic block and a second magnetic unit, the second ferromagnetic block is fixed on the upper clamping bracket, the second magnetic unit is fixed on the feeding sliding seat, and the second magnetic unit is used to adsorb the second ferromagnetic block.

[0015] Preferably, the feeding drive assembly includes a feeding motor, a feeding screw and a feeding nut. The feeding screw is fixed to the workbench by a rotating connection. The center line of the feeding screw is consistent with the direction of the feeding channel. The feeding motor is fixed on the workbench and is connected to the feeding screw driving connection. The feeding nut is fixed on the feeding sliding seat and is connected to the feeding screw driving connection.

[0016] Compared with the existing technology, one or more of the above technical solutions have the following beneficial effects:

[0017] The present invention cooperates with the feeding sliding seat to enable the bent pipe to move towards or away from the pipe end forming machine, and can also rotate the bent pipe horizontally, thereby realizing the loading and unloading of the bent pipe, reducing the loading and unloading time of the bent pipe, improving the loading and unloading efficiency of the bent pipe, and reducing the production cost of the bent pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 3 This is a front view of the feed drive assembly of the present invention;

[0021] Figure 4 Schematic diagram of the three-dimensional structure of the feeding drive assembly of the present invention;

[0022] Figure 5 Schematic diagram of the installation structure of the limit ring of the present invention;

[0023] Figure 6 Schematic diagram of the connection between the limiting ring and the limiting gear of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the flip assembly of the present invention;

[0025] Figure 8 This is a schematic diagram of the exploded structure of the flip assembly of the present invention;

[0026] Figure 9 It is a schematic diagram of the three-dimensional structure of the clamping mechanism of the present invention;

[0027] Figure 10 This is a schematic diagram of the installation structure of the transmission component of the present invention;

[0028] Figure 11 Schematic diagram of the installation structure of the feed drive assembly of the present invention;

[0029] Figure 12 This is a usage state diagram of the present invention.

[0030] In the figure: 1. Workbench; 101. Feeding channel; 2. Feeding slide seat; 21. Linear slider; 22. Linear guide rail; 23. Sliding guide post; 24. Adjusting screw; 25. Adjusting nut; 3. Feeding drive assembly; 31. Feeding motor; 32. Feeding screw; 33. Feeding nut; 41. Upper clamping block; 411. Upper clamping groove; 42. Lower clamping block; 421. Lower clamping groove; 4211. Lower rotating groove; 422. Lower receiving groove; 43. Clamping drive member; 44. Limiting ring; 441. Limiting drive groove ; 45. Limit motor; 46. Limit gear; 47. Limit push rod; 48. Limit spring; 49. First magnetic unit; 5. Flip assembly; 51. Flip drive end; 52. Arc guide rail; 53. Flip motor; 54. Flip gear; 55. Guide wheel group; 551. Flip groove; 6. Conveying assembly; 71. Upper clamping bracket; 711. Upper clamping groove; 72. Lower clamping bracket; 721. Lower clamping groove; 73. First telescopic member; 74. Second telescopic member; 75. Second ferromagnetic block; 76. Second magnetic unit. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0032] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words “including” or “comprising” and the like used in this disclosure mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words “connected” or “connected” and the like are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. “Up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0033] like Figures 1 to 4 As shown, the present invention provides a feeding mechanism of a tube end forming machine, which is used for feeding bent tubes on the tube end forming machine, including a workbench 1, a feeding sliding seat 2, a feeding drive assembly 3 and a clamping feeding assembly 4. The tube end forming machine is arranged in the width direction of the workbench 1, and a feeding channel 101 is provided at the upper end of the workbench 1. The feeding channel 101 is arranged along the width direction of the workbench 1, and a linear guide rail 22 is installed in the feeding channel 101 along the width direction of the workbench 1. A linear slider 21 is installed at the lower end of the feeding sliding seat 2, and the linear slider 21 is slidably installed on the linear guide rail 22. The feeding sliding seat 2 can move along the width direction of the workbench 1, thereby moving away from or close to the tube end forming machine.

[0034] The feeding drive assembly 3 is fixed to the workbench 1 and is drivingly connected to the feeding slide 2, and is used to drive the feeding slide 2 to move toward or away from the tube end forming machine;

[0035] The clamping and feeding assembly 4 includes an upper clamping block 41, a lower clamping block 42 and a clamping drive 43. The upper clamping block 41 is detachably fixed to one end of the feeding sliding seat 2 facing the tube end forming machine, and the lower clamping block 42 is fixed to the one end of the feeding sliding seat 2 facing the tube end forming machine by a sliding connection. An upper clamping groove 411 is provided at the lower end of the upper clamping block 41, and a lower clamping groove 421 is provided at the lower end of the lower clamping block 42. The clamping drive 43 is fixed on the feeding sliding seat 2, and the clamping drive 43 is drivingly connected to the lower clamping block 42. The clamping drive 43 is used to drive the lower clamping block 42 to move toward or away from the upper clamping block 41. When the lower clamping block 42 conflicts with the upper clamping block 41, the upper clamping groove 411 and the lower clamping groove 421 combine to clamp the clamping part of the bent pipe.

[0036] As an example, the upper clamping block 41 can be installed in a fixed or sliding manner, preferably in a sliding manner, to facilitate adjustment of the center height of the elbow. Specifically, two sliding guide posts 23 are slidably installed on the upper part of the feed slide 2. The lower ends of the sliding guide posts 23 are fixed to the upper end of the upper clamping block 41. The upper end of the upper clamping block 41 is also rotatably installed with an adjustment screw 24. The adjustment screw 24 is connected to the feed slide 2 by a threaded connection. The outer wall of the adjustment screw 24 is also fitted with an adjustment nut 25. The lower end of the adjustment nut 25 can be rotated to contact the upper end of the upper clamping block 41 and fix the adjustment screw 24. During adjustment, the height position of the upper clamping block 41 can be controlled by rotating the adjustment screw 24, thereby changing the center height of the adjustment elbow.

[0037] As an example, the clamping drive member 43 is a telescopic cylinder, which can be driven electrically, pneumatically or hydraulically for easy control.

[0038] Specifically, the present invention enables the bent pipe to move toward or away from the pipe end forming machine through the cooperation of the clamping feeding assembly 4 and the feeding sliding seat 2, and can also rotate the bent pipe horizontally, thereby realizing the loading and unloading of the bent pipe, reducing the loading and unloading time of the bent pipe, improving the loading and unloading efficiency of the bent pipe, and reducing the production cost of the bent pipe.

[0039] As an optional embodiment, in order to facilitate the unloading stability of the bent pipe, a lower rotating groove 4211 is opened in the lower clamping groove 421, and the rotation center line of the lower rotating groove 4211 coincides with the rotation center line of the lower clamping groove. A limit ring 44 is slidably installed in the lower rotating groove 4211, and a limit driving component is installed on the lower clamping block 42. The limit driving component is driven and connected to the limit ring 44 and is used to drive the limit ring 44 to rotate. The limit ring 44 has at least a first state and a second state.

[0040] When the limiting ring 44 is in the first state, the limiting ring 44 is located in the lower clamping groove 421, and the lower clamping groove 421 is open, so that when the upper clamping groove 411 and the lower clamping groove 421 are combined, the outer wall of the elbow can be clamped.

[0041] When the limiting ring 44 is in the second state, part of the limiting ring 44 extends out of the lower clamping groove 421, so that the limiting ring 44 and the lower clamping groove 421 are combined to form an arc-shaped limiting portion. The limiting portion can limit part of the freedom of the bent pipe, and the bent pipe can rotate within the limiting portion. During the downward movement of the lower clamping block 42, the bent pipe is prevented from slipping, thereby ensuring the stability of the bent pipe during unloading.

[0042] like Figures 5 and 6 As shown, as an example, the limit drive assembly includes a limit motor 45 and a limit gear 46. A lower receiving groove 422 is opened in the lower clamping block 42. A rotating shaft is provided at both ends of the limit gear 46. The rotating shaft is installed in the lower receiving groove 422 through a bearing connection. The limit motor 45 is fixed to the end of the lower clamping block 42 facing away from the tube end forming machine. The limit motor 45 adopts a servo motor, which can control the rotation angle of the output shaft.

[0043] The output shaft of the limit motor 45 is connected to the limit gear 46 through a coupling. A plurality of limit driving grooves 441 are provided on the outer wall of the limit ring 44. Part of the limit gear 46 extends to the lower clamping groove 421 and engages with the limit driving groove 441.

[0044] Specifically, when the limit motor 45 is working, the output shaft of the limit motor 45 drives the limit gear 46 to rotate, and the limit gear 46 drives the limit ring 44 to rotate, thereby controlling the rotation angle of the limit ring 44 and realizing the switching of the limit ring 44 between the first state and the second state.

[0045] like Figures 5 and 6 As shown, as an example, in order to increase the fixing effect of the limit ring 44, the limit drive assembly also includes a limit push rod 47, a limit spring 48 and a first magnetic unit 49. The limit push rod 47 is installed in the lower accommodating groove 422 by a sliding connection. The limit spring 48 is sleeved on the outer wall of the limit push rod 47. A flange is provided on the outer wall of the limit push rod 47. One end of the limit spring 48 is in contact with the flange, and the other end is in contact with the accommodating groove. The elastic force of the limit spring 48 pushes one end of the limit push rod 47 to move toward the direction of the limit gear 46. The other end of the limit push rod 47 is fixed with a first ferromagnetic block. The first magnetic unit 49 is fixed on the lower clamping block 42. The first magnetic unit 49 can generate magnetic force, so that the first ferromagnetic block drives the limit push rod 47 to move in the direction away from the limit gear 46.

[0046] Specifically, the first magnetic unit 49 adopts an electromagnet, which makes it easy for the operator to control the magnetic force; under normal conditions, one end of the limit rod 47 contacts the outer wall of the limit gear 46, thereby limiting the rotation of the limit ring 44 and increasing the fixing effect of the limit ring 44; when the first magnetic unit 49 is energized, the magnetic force generated by the electromagnet is used to adsorb the first ferromagnetic block, and the limit rod 47 moves in a direction away from the limit gear 46, so that the other end of the limit rod 47 is separated from the limit gear 46, and the limit ring 44 can rotate normally.

[0047] like Figures 8 and 9 As shown, to further facilitate unloading of the bent pipe, the feeding mechanism also includes a flip assembly 5, which is fixedly mounted on the feeding slide 2. The flip assembly 5 has a rotatable flip drive end 51. When the retaining ring 44 is in the second state, the flip drive end 51 drives the bent pipe to rotate to a set angle about the centerline of the arc-shaped positioning portion. During use, the bent pipe is driven by the flip assembly to rotate to the set angle, facilitating subsequent unloading operations.

[0048] As an example, the flipping assembly 5 includes an arc-shaped guide rail 52, a flipping motor 53, a flipping gear 54 and several guide wheel groups 55. The guide wheel groups 55 are all fixed on the feeding sliding seat 2 and combined to form an arc-shaped channel. The arc-shaped guide rail 52 is slidably installed in the arc-shaped channel and can slide along the arc-shaped channel. The flipping motor 53 is fixed on the feeding sliding seat 2. The flipping gear 54 is fixed to the output shaft of the flipping motor 53. Several flipping grooves 551 are opened on the outer wall of the arc-shaped guide rail 52. The flipping gear 54 is engaged with the flipping groove 551. The flipping drive end 51 is fixedly connected to the arc-shaped guide rail 52. The flipping drive end 51 is an arc-shaped resistance block, and the arc-shaped resistance block matches the bent pipe.

[0049] Specifically, the flip motor 53 works, the output shaft of the flip motor 53 drives the flip gear 54 to rotate, the flip gear 54 drives the arc guide rail 52 to move along the arc channel, the arc guide rail 52 drives the flip drive end 51 to move, and the flip drive end 51 drives the bent pipe to rotate.

[0050] like Figure 10 As shown, to increase the unloading speed of the bent pipes, the feeding mechanism also includes a conveyor assembly 6, which is fixed to the upper end of the workbench 1 and located at the end of the feeding channel 101 away from the tube end forming machine. Specifically, the conveyor assembly 6 is a conveyor belt, which is arranged along the length of the workbench 1. When the bent pipe is rotated to the appropriate angle, the feed slide 2 moves to feed the bent pipe onto the conveyor belt, and then it is sent to the next process step via the conveyor belt, thereby improving the unloading efficiency of the bent pipes.

[0051] like Figure 9As shown, in order to improve the stability of the bent pipe when it is fixed, the feeding mechanism also includes a clamping mechanism, which is arranged at the lower part of the workbench 1 and below the feeding sliding seat 2. The clamping mechanism includes an upper clamping bracket 71 and a lower clamping bracket 72. The upper clamping bracket 71 is installed on the feeding sliding seat 2 by means of a bearing connection. An upper clamping groove 711 is provided on the upper clamping bracket 71. A first telescopic member 73 is fixedly installed on the upper clamping bracket 71 by means of a bearing connection. The end of the first telescopic member 73 is connected by a bearing. The lower clamping bracket 72 is provided with a lower clamping groove 721, and a second telescopic member 74 is provided below the lower clamping bracket 72. The second telescopic member 74 is fixed on the feeding sliding seat 2, and the telescopic end of the second telescopic member 74 is fixedly connected to the lower clamping bracket 72 and is used to drive the vertical movement of the lower clamping bracket 72.

[0052] As an example, the first telescopic member 73 and the second telescopic member 74 both adopt telescopic rods, which can be driven electrically, pneumatically or hydraulically to facilitate length adjustment of the telescopic rods.

[0053] Specifically, the lower end of the upper clamping bracket 71 and the upper end of the lower clamping bracket 72 can conflict with each other. At this time, the upper clamping groove 711 and the lower clamping groove 721 are combined with each other to clamp the lower part of the bent pipe to prevent the bent pipe from shaking during processing.

[0054] In order to improve the stability when the bent pipe is fixed, the clamping mechanism also includes a second ferromagnetic block 75 and a second magnetic unit 76. The second ferromagnetic block 75 is fixed on the upper clamping bracket 71, and the second magnetic unit 76 is fixed on the feeding sliding seat 2. The second magnetic unit 76 is used to adsorb the second ferromagnetic block 75.

[0055] As an example, the second magnetic unit 76 is an electromagnet, which facilitates the operator to control the magnetic force.

[0056] Specifically, when the second magnetic unit 76 is energized, magnetic force is generated to attract the second magnet block, thereby fixing the upper clamping bracket 71 and the lower clamping bracket 72, further increasing the stability of the bent pipe.

[0057] like Figures 11 to 12As shown, in some optional embodiments, the feeding drive assembly 3 includes a feeding motor 31, a feeding screw 32 and a feeding nut 33. The feeding screw 32 is fixed to the lower part of the workbench 1 by a bearing connection. The center line of the feeding screw 32 is consistent with the direction of the feeding channel 101. The feeding motor 31 is fixed on the workbench 1 and is driven by the feeding screw 32. The feeding nut 33 is fixed on the feeding sliding seat 2 and is driven by the feeding screw 32.

[0058] Specifically, when the feeding motor 31 is working, the output shaft of the feeding motor 31 drives the feeding screw 32 to rotate, the feeding screw 32 drives the feeding nut 33 to move, and the driven nut drives the feeding sliding seat 2 to move, which is convenient for controlling the movement of the feeding sliding seat 2 and has high movement accuracy.

[0059] In general, the present invention realizes the clamping, feeding and rapid unloading of the bent pipe through the cooperation of the clamping and feeding component 4 and the feeding sliding seat 2, thereby improving the accuracy of pipe end forming and production efficiency. At the same time, the cooperation of the limit drive component and the flipping component 5 is used to rotate the vertical bent pipe to the horizontal direction, which facilitates the transportation of the bent pipe and improves the loading and unloading efficiency of the bent pipe.

[0060] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. A feeding mechanism for a tube end forming machine, used for feeding bent tubes on the tube end forming machine, characterized in that: The workbench (1) has a feeding channel (101) facing or away from the tube end forming machine; A feeding sliding seat (2) is slidably mounted in the feeding channel (101) and can move toward or away from the tube end forming machine; A feeding drive assembly (3) is fixed to the workbench (1) and is drivingly connected to the feeding slide seat (2) for driving the feeding slide seat (2) to move toward or away from the tube end forming machine; The clamping and feeding assembly comprises an upper clamping block (41), a lower clamping block (42) and a clamping drive member (43), wherein the upper clamping block (41) is detachably fixed to one end of the feeding slide seat (2) facing the tube end forming machine, and the lower clamping block (42) is fixed to the one end of the feeding slide seat (2) facing the tube end forming machine by means of a sliding connection, wherein the upper clamping block (41) has an upper clamping groove (411), and the lower clamping block (42) has a lower clamping groove (412). The clamping groove (421) is fixed on the feeding slide seat (2), and the clamping driving member (43) is connected to the lower clamping block (42) by driving. The clamping driving member (43) is used to drive the lower clamping block (42) to move toward or away from the upper clamping block (41). When the lower clamping block (42) conflicts with the upper clamping block (41), the upper clamping groove (411) and the lower clamping groove (421) are combined to clamp the clamping portion of the bent pipe; A limiting ring (44) is rotatably installed in the lower clamping groove (421) and rotates in coincidence with the center line of the lower clamping groove (421). A limiting driving component is installed on the lower clamping block (42). The limiting driving component is drivingly connected to the limiting ring (44) and is used to drive the limiting ring (44) to rotate. The limiting ring (44) has at least a first state and a second state. When the limiting ring (44) is in the first state, the limiting ring (44) is located in the lower clamping groove (421), and the lower clamping groove (421) is open; when the limiting ring (44) is in the second state, part of the limiting ring (44) extends out of the lower clamping groove (421), so that the limiting ring (44) and the lower clamping groove (421) are combined to form an arc-shaped limiting portion; The feeding mechanism also includes a clamping mechanism, which includes an upper clamping bracket (71) and a lower clamping bracket (72), wherein the upper clamping bracket (71) is mounted on the feeding slide seat (2) by means of a rotational connection, an upper clamping groove (711) is provided on the upper clamping bracket (71), a first telescopic member (73) is fixedly mounted on the upper clamping bracket (71) by means of a rotational connection, and an end portion of the first telescopic member (73) is fixed to the feeding slide seat (2) by means of a rotational connection, and is used to rotate the upper clamping bracket (71) and the lower clamping bracket (72) to rotate the upper clamping bracket (71). To drive the upper clamping bracket (71) to rotate, the lower clamping bracket (72) is installed on the feeding sliding seat (2) by means of a sliding connection, and a lower clamping groove (721) is provided on the lower clamping bracket (72), and a second telescopic member (74) is provided below the lower clamping bracket (72), and the second telescopic member (74) is fixed on the feeding sliding seat (2), and the telescopic end of the second telescopic member (74) is fixedly connected to the lower clamping bracket (72) and is used to drive the vertical movement of the lower clamping bracket (72).

2. The feeding mechanism of the tube end forming machine according to claim 1, characterized in that: The limit drive assembly includes a limit motor (45) and a limit gear (46); a lower receiving groove (422) is provided in the lower clamping block (42); the limit gear (46) is installed in the lower receiving groove (422) by means of a rotational connection; the limit motor (45) is fixed to the end of the lower clamping block (42) facing away from the tube end forming machine; the output shaft of the limit motor (45) is drive-connected to the limit gear (46); a plurality of limit drive grooves (441) are provided on the outer wall of the limit ring (44); a portion of the limit gear (46) extends to the lower clamping groove (421) and meshes with the limit drive groove (441).

3. The feeding mechanism of the tube end forming machine according to claim 2, characterized in that: The limit drive assembly also includes a limit push rod (47), a limit spring (48) and a first magnetic unit (49). The limit push rod (47) is installed in the lower accommodating groove (422) by means of a sliding connection. The limit spring (48) is sleeved on the outer wall of the limit push rod (47) and pushes one end of the limit push rod (47) to move toward the limit gear (46). The other end of the limit push rod (47) is fixed with a first ferromagnetic block. The first magnetic unit (49) is fixed on the lower clamping block (42). The first magnetic unit (49) can generate magnetic force, so that the first ferromagnetic block drives the limit push rod (47) to move in a direction away from the limit gear (46).

4. The feeding mechanism of the tube end forming machine according to claim 1, characterized in that: The feeding mechanism further comprises a flip assembly (5), the flip assembly (5) being fixedly mounted on the feeding slide seat (2), the flip assembly (5) having a rotatable flip driving end (51), and when the limiting ring (44) is in the second state, the flip driving end (51) drives the bent pipe to rotate to a set angle along the center line of the arc-shaped positioning portion.

5. The feeding mechanism of the tube end forming machine according to claim 4, characterized in that: The flip assembly (5) includes an arc guide rail (52), a flip motor (53), a flip gear (54) and a plurality of guide wheel groups (55). The guide wheel groups (55) are all fixed on the feeding slide seat (2) and are combined to form an arc channel. The arc guide rail (52) is slidably installed in the arc channel and can slide along the arc channel. The flip motor (53) is fixed on the feeding slide seat (2). The flip gear (54) is fixed to the output shaft of the flip motor (53). A plurality of flip grooves (551) are provided on the outer wall of the arc guide rail (52). The flip gear (54) is engaged with the flip grooves (551). The flip drive end (51) is fixedly connected to the arc guide rail (52).

6. The feeding mechanism of the tube end forming machine according to claim 5, characterized in that: The feeding mechanism further comprises a conveying assembly (6), wherein the conveying assembly (6) is fixed to the upper end of the workbench (1), and the conveying assembly (6) is located at one end of the feeding channel (101) away from the tube end forming machine.

7. The feeding mechanism of the tube end forming machine according to claim 1, characterized in that: The clamping mechanism further comprises a second ferromagnetic block (75) and a second magnetic unit (76), wherein the second ferromagnetic block (75) is fixed on the upper clamping bracket (71), and the second magnetic unit (76) is fixed on the feeding slide seat (2), and the second magnetic unit (76) is used to adsorb the second ferromagnetic block (75).

8. The feeding mechanism of the tube end forming machine according to claim 1, characterized in that: The feeding drive assembly (3) includes a feeding motor (31), a feeding screw (32) and a feeding nut (33); the feeding screw (32) is fixed to the workbench (1) by a rotational connection; the center line of the feeding screw (32) is consistent with the direction of the feeding channel (101); the feeding motor (31) is fixed to the workbench (1) and is drivingly connected to the feeding screw (32); the feeding nut (33) is fixed to the feeding sliding seat (2) and is drivingly connected to the feeding screw (32).

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