A U-shaped tube automatic bending device

Abstract

The present invention discloses an automatic U-shaped tube bending device, comprising a machine base, on which are provided: a tube cutting mechanism capable of cutting an inclined cut on the outer wall of a tube; a feeding mechanism capable of pulling the tube off to form a blank and then conveying the blank to a tube bending mechanism; a tube bending mechanism located at the feeding mechanism and capable of bending the blank into a finished product; the purpose of the invention is to overcome the deficiencies of the prior art and provide an automatic U-shaped tube bending device capable of stably and efficiently completing the tube bending process of the tube in one go.

Description

Technical Field

[0001] The invention particularly relates to an automatic pipe bending device for U-shaped pipes. Background Art

[0002] In the field of metal processing and manufacturing, pipe bending machines are important equipment used to bend straight pipes into specific shapes. However, in the traditional pipe bending process, when the pipe is bent, due to the physical properties of the material, the inner bend is compressed and the outer bend is stretched. This uneven deformation often causes the cut of the pipe to tilt after bending, affecting the appearance quality and assembly accuracy of the product. Therefore, in the pipe bending process, after completing the pipe bending step, it is often necessary to cut the pipe end to cut out a flat pipe end, but this causes cumbersome processing steps and waste of materials. Due to the uneven deformation of the material when the pipe is bent, there is no pipe bending equipment on the market that can be processed and formed in one go.

[0003] The present invention is just produced based on the above-mentioned shortcomings. Summary of the invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and to provide an automatic U-shaped tube bending device which can stably and efficiently complete the tube bending process of a tube in one go.

[0005] The present invention is achieved through the following technical solutions:

[0006] The present invention provides an automatic U-shaped tube bending device, comprising a machine base, on which are provided: a tube cutting mechanism capable of cutting an inclined cut on the outer wall of a tube; a feeding mechanism capable of pulling the tube apart to form a blank and then conveying the blank to a tube bending mechanism; and a tube bending mechanism located at the feeding mechanism and capable of bending the blank into a finished product.

[0007] As described above, the automatic bending device for U-shaped tubes, the feeding mechanism transports the tubes along the axis, and forms a feeding channel for transporting the tubes on the machine base, the tube cutting mechanism includes a cutting component that can rotate around the feeding channel, a first driving device for driving the cutting component to rotate, and the rotation axis of the cutting component forms an angle with the feeding channel, the cutting component includes a rotating seat, the rotating seat is provided with a sliding member that can slide relative to the rotating seat, the sliding member is provided with a cutting knife, the sliding member is connected with a counterweight, the counterweight and the cutting knife are respectively located on both sides of the feeding channel, so that when the rotating seat rotates, the counterweight can pull the sliding member to move and thereby move the cutting knife toward the center of the feeding channel.

[0008] As described above, the automatic bending device for U-shaped tubes, the bending mechanism includes a bending die assembly, the bending die assembly is provided with a clamping channel for the tube to pass through, and an arc-shaped bending groove connected to the clamping channel, the bending mechanism also includes a flip seat rotatably connected to the machine base and with a rotation center consistent with the center of the bending groove, a second driving device arranged between the machine base and the flip seat and used to drive the flip seat to rotate, a bending mandrel rod slidably connected to the flip seat and capable of being inserted into the inner cavity of the tube passing through the clamping channel after sliding, the flip seat is provided with a third driving device for driving the bending mandrel rod to slide, a mandrel sleeve slidably connected to the flip seat and capable of being pressed against the tube end of the tube passing through the clamping channel after sliding, and the rotating seat is provided with a fourth driving device for driving the mandrel sleeve to slide.

[0009] The automatic U-shaped tube bending device as described above, the feeding mechanism includes a feeding support connected to the machine base, the feeding support is connected to an upper clamping plate, the feeding mechanism is connected to a lower clamping plate that can slide toward or away from the upper clamping plate, the material support is also provided with a fifth driving device for driving the lower clamping plate to slide, the upper clamping plate is provided with a first tube clamping groove at the bottom, the lower clamping plate is provided with a second tube clamping groove at the top, after the lower clamping plate moves toward the upper clamping plate, the first tube clamping groove and the second tube clamping groove are combined to form a tube clamping channel for clamping the pipe fitting, the feeding support is slidably connected to the machine base so that the feeding support can move between the pipe cutting mechanism and the pipe bending mechanism, the machine base is also provided with a sixth driving device for driving the feeding support to slide, the pipe fitting is clamped after the lower clamping plate and the upper clamping plate are closed, and the clamped pipe fitting can be pulled off and made into a blank when the feeding support moves.

[0010] As described above, the automatic U-shaped tube bending equipment, the machine base is also provided with a unloading mechanism for collecting the finished products made by the tube bending mechanism and conveying them to the discharge port, the unloading mechanism includes a collection trough frame arranged below the tube bending mechanism, the bottom of the collection trough frame is provided with an inclined discharge plate, the collection trough frame is provided with the discharge port on the discharge plate, and the upper surface of the discharge plate of the collection trough frame is provided with a plurality of discharge pipes parallel to the discharge plate.

[0011] As described above, the automatic U-shaped tube bending equipment is further provided with a feeding mechanism for conveying tubes on the machine base, the feeding mechanism comprises a feeding support capable of moving along the tube conveying path, a seventh driving device for driving the feeding support to move, and the feeding support is provided with a supporting hole for the tube to pass through and for supporting the tube.

[0012] As described above, the automatic U-shaped tube bending device is further provided with a straightening mechanism on the machine base, and the straightening mechanism is located in front of the feeding mechanism and is used for straightening the tube.

[0013] As described above, in the automatic U-shaped tube bending equipment, an adjustment seat is provided on the machine base, and the adjustment seat is rotatably connected to the machine base so that the adjustment seat can swing relative to the machine base. A locking structure for locking the adjustment seat is provided between the adjustment seat and the machine base, and the cutting assembly and the driving device are both connected to the adjustment seat.

[0014] As described above, in the non-fixed pipe bending mechanism, the end of the pipe bending mandrel is provided with a second spherical arc surface on the side away from the pipe bending groove for pressing against the inner wall of the outer bend of the pipe fitting, the radius of the second spherical arc surface is R1, and the arc radius of the center line of the pipe bending groove is R2, then R1=R2.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The automatic U-shaped tube bending equipment of the present invention has a high degree of automation, which improves production efficiency and product yield. The equipment includes a tube cutting mechanism, which can cut an inclined cut so that the tube end of the blank is inclined, and the tube bending mechanism can realize the tube bending while making the blank smoothly form uneven deformation at the inner bend and the outer bend. This uneven deformation offsets the inclined end surface pre-made by the tube cutting mechanism at the tube end of the blank, so that the bent tube parts are made at one time, and there is no need to perform steps such as cutting the tube end after the tube bending process. In addition, since the tube bending mechanism of the equipment does not require high positioning and clamping force for the pipe fitting, it is not necessary to clamp the pipe wall of the pipe fitting, which is particularly suitable for thin pipe fittings, avoiding problems such as material tearing caused by uneven deformation of the pipe fitting during the pipe bending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the automatic U-shaped tube bending device of the present invention;

[0018] Figure 2 is a schematic structural diagram of the pipe cutting mechanism of the present invention;

[0019] Figure 3 is a partial cross-sectional schematic diagram of the pipe cutting mechanism of the present invention;

[0020] Figure 4 is an exploded schematic diagram of the cutting assembly of the present invention;

[0021] Figure 5 is a cross-sectional schematic diagram of the pipe bending mechanism of the present invention;

[0022] Figure 6 It is a schematic diagram of the bending mechanism and feeding mechanism of the present invention;

[0023] Figure 7 It is a structural schematic diagram of the pipe bending mechanism of the present invention;

[0024] Figure 8 It is a partial structural decomposition schematic diagram of the pipe bending mechanism of the present invention;

[0025] Fig. 9 It is a structural schematic diagram of the feeding mechanism of the present invention;

[0026] Fig.10 is a cross-sectional schematic diagram of the feeding mechanism of the present invention;

[0027] Fig.11 It is a partial cross-sectional schematic diagram of the material discharging mechanism of the present invention;

[0028] Fig.12 It is a structural schematic diagram of the feeding mechanism of the present invention. DETAILED DESCRIPTION

[0029] The invention will be further described below in conjunction with the accompanying drawings:

[0030] The directions described in the specification of the present invention, such as "up", "down", "left", "right", "front", "back", etc., are based on the directions of the drawings and are intended to facilitate the description of the relationship between the various components. They do not indicate the unique or absolute positional relationship between the various components. They are only one of the implementation methods of the invention and are not a limitation on its implementation method.

[0031] In this embodiment, a U-shaped tube automatic bending device is provided, such as Figure 1 As shown, the automatic U-shaped tube bending equipment comprises a machine base 1, on which are provided: a loading mechanism 2, a tube cutting mechanism 3, a feeding mechanism 4, a tube bending mechanism 5, a feeding mechanism 6, and a straightening mechanism 7.

[0032] As a preferred embodiment of the feeding mechanism 2, Fig.11 As shown, the feeding mechanism 2 includes a feeding support 21 that can move along the conveying path of the pipe A, and a seventh driving device 22 for driving the feeding support 21 to move. The feeding support 21 is provided with a supporting hole 211 for the pipe A to pass through and for supporting the pipe A, so that the pipe A can be driven to move along the axial direction. In order to allow the pipe A to move along the axial direction on the device, a feeding channel 100 for conveying the pipe A is formed along the moving path of the device along the moving path of the pipe A.

[0033] The pipe cutting mechanism 3 is located behind the feeding mechanism 2 and can cut an inclined cut on the outer wall of the pipe A. As a preferred embodiment of the pipe cutting mechanism 3, Figures 2 to 4 As shown, the tube cutting mechanism 3 includes a cutting assembly 30 that can rotate around the feeding channel 100, and a first driving device 31 for driving the cutting assembly 30 to rotate, and the rotation axis of the cutting assembly 30 forms an angle with the feeding channel 100, as shown in FIG. Figure 3As shown, the rotation axis P1 of the cutting assembly 30 forms an angle α with the center line P2 of the feeding channel 100, wherein the angle α generally ranges from 5° to 15°, and a larger or smaller angle may be set in special cases. The cutting assembly 30 includes a rotating seat 32, on which a sliding member 33 capable of sliding relative thereto is disposed, on which a cutting knife 34 is disposed, and on which a counterweight 35 is connected, and the counterweight 35 and the cutting knife 34 are respectively located on both sides of the feeding channel 100, so that when the rotating seat 32 rotates, the counterweight 35 can pull the sliding member 33 to move, thereby causing the cutting knife 34 to move toward the center of the feeding channel 100. The cutting assembly 30 includes a rotating seat 32, on which a sliding member 33 capable of sliding relative thereto is disposed, on which a cutting knife 34 is disposed, and on which a counterweight 35 is connected, and the counterweight 35 and the cutting knife 34 are respectively located on both sides of the feeding channel 10, so that when the rotating seat 32 rotates, the counterweight 35 can pull the sliding member 33 to move, thereby causing the cutting knife 34 to move toward the center of the feeding channel 10. When working, the rotating seat 32 is in the first driving device 3 1, when the rotating seat 32 rotates, the counterweight 35 moves in a direction away from the rotating axis P1 due to the centrifugal force, thereby driving the sliding member 33 to move. During the movement of the sliding member 33, the counterweight 35 moves away from the center P2 of the feeding channel 100 and the cutting knife 34 approaches the center P2 of the feeding channel 100, so that the cutting knife 34 presses against the pipe A. At the same time, the cutting knife 34 rotates in a circle along the cylindrical surface of the pipe A, and the rotation trajectory is inclined relative to the center P2 of the feeding channel 10, thereby cutting an inclined incision. Through the above structure, since the rotation direction of the cutting knife 34 is at an angle with the axial direction of the pipe A, in order to cut a precise inclined incision, the moving path of the cutting knife 34 is elliptical, so it is necessary to pull the cutting knife 34 to press against the pipe A through the counterweight 35, and then the cutting knife 34 can automatically adapt to the path of the incision during the rotation of the rotating seat 32, which is impossible to achieve by the traditional pipe cutting equipment only by moving the position of the cutting knife 34.

[0034] In this embodiment, the counterweight 35 and the sliding member 33 can be a separate structure or an integrated structure.

[0035] Detailed structure such as Figure 3 and Figure 4As shown, the rotating seat 32 is composed of a driving cylinder seat 32a and a mounting sleeve seat 32b connected and combined, that is, the rotating seat 21 is a split type, and of course it can also be made into an integrated type. In this embodiment, a raised mounting boss 311 is provided in the middle of the drive cylinder seat 32a, and a sliding groove 312 with open ends is provided on the mounting boss 311. The drive cylinder seat 32a is connected to a mounting sleeve 32b, and the mounting sleeve 32b is provided with a ring 313 which is sleeved on the mounting boss 311 and closes the two ends of the sliding groove 312. The ring 313 is provided with a matching recess 314 corresponding to the sliding groove 312. The matching recess 314 and the sliding groove 312 constitute a cavity for the sliding member 33 to slide. By assembly, the drive cylinder seat 32a and the mounting sleeve 32b are connected and combined to form a closed cavity for the sliding member 33 to slide in the cavity. This structure only requires the sliding member 33 to be assembled into the sliding groove 312 first, and then the mounting sleeve 32b is sleeved and connected to the mounting boss 311. In a mechanism with a smaller structural size, the stability and firmness of the structure can be guaranteed.

[0036] like Figure 3 and Figure 4 As shown, the rotating seat 32 is provided with a first feeding hole 310 for the pipe A to pass through, and the middle part of the sliding member 33 is provided with a second feeding hole 330 for the pipe A to pass through, and the sliding member 33 is connected to the cutting knife 34 on one side of the second feeding hole 330, and the sliding member 33 is connected to the counterweight 35 on the other side of the second feeding hole 330, wherein the connection between the counterweight 35 and the sliding member 33 is through a connecting key 38, and the counterweight 35 is connected to the connecting key 38 by a card slot, and can also be connected to the sliding member 33 by welding, bonding, etc.

[0037] In practical applications, in order to adapt to pipe fittings A of different diameters, the inclination of the cut is different due to the uneven degree of compression at the inner bend and stretching at the outer bend of different diameters during pipe bending. In addition, if the wall thickness of pipe fittings A of the same diameter is different, the inclination of the cut will also be different during pipe bending. For this reason, Figure 1 and Figure 2As shown, the machine base 1 is provided with an adjustment seat 36, and the adjustment seat 36 is rotatably connected to the machine base 1 so that the adjustment seat 36 can swing relative to the machine base 1. A locking structure 37 for locking the adjustment seat 36 is provided between the adjustment seat 36 and the machine base 1, so that the adjustment seat 36 can adjust the swing angle, and then the cutting assembly 30 and the first drive device 31 are both connected to the adjustment seat 36, so that the inclination angle between the rotation axis P1 of the cutting assembly 30 and the center line P2 of the feeding channel 10 can be adjusted, so as to adapt to pipes with different diameters and different wall thicknesses. Among them, the locking structure 37 includes an arc hole 371 arranged on the machine base 1 and concentric with the rotation axis of the adjustment seat 36, and a connecting hole arranged on the adjustment seat 36 and corresponding to the arc hole 371, and the connecting hole is a conventional threaded hole, which is not shown in the figure, so that the mounting bolt can pass through the arc hole 371 and connect with the connecting hole 41, wherein the mounting bolt is a standard part, which is not shown in the figure.

[0038] As an implementation mode of the first driving device 31, the first driving device 31 includes a driving motor, which is installed and connected to the adjustment seat 36, and the driving cylinder seat 32a of the cutting component 30 is rotatably connected to the adjustment seat 36. The output shaft of the driving motor 31 is connected to a pulley, and the pulley is wound with a belt, and the belt is wound on the driving cylinder seat 32a, and then all the driving cylinder seats 32a are driven to rotate synchronously by the same driving motor. The cutting component 30 is provided with multiple belts, and the belts are sequentially wound on the driving cylinder seats 32a of each cutting component 30, wherein the winding method is as follows: Figure 2 As shown, the belt is S-shaped and passes through each drive cylinder seat 32a in turn, or passes through two drive cylinder seats 32a one by one to achieve synchronous rotation of each drive cylinder seat 32a, making the structure more compact while ensuring the consistency of the work of each cutting assembly 30, ensuring the quality and yield of the product. In order to accurately control the speed and angle of rotation of the cutting assembly 30, as a preferred embodiment, the drive motor 31 can use a servo motor that can accurately control the speed and rotation angle, the pulley can use a synchronous pulley with teeth, and the belt can use a synchronous belt with teeth on the inside.

[0039] The feeding mechanism 4 is located behind the tube cutting mechanism 3 and can break the tube A into blanks and then transport them to the tube bending mechanism 5. As a preferred embodiment of the tube cutting mechanism 3, Figure 8 and Fig. 9As shown, the feeding mechanism 4 includes a feeding support 41 connected to the machine base 1, an upper clamping plate 42 is connected to the feeding support 41, a lower clamping plate 43 that can slide toward or away from the upper clamping plate 42 is connected to the feeding mechanism 4, and a fifth driving device 44 for driving the lower clamping plate 43 to slide is also provided on the feeding support, a first clamping groove 421 is provided on the bottom of the upper clamping plate 42, and a second clamping groove 431 is provided on the top of the lower clamping plate 43, and the lower clamping plate 43 moves toward the upper clamping plate 4 2 After the movement, the first clamping groove 421 and the second clamping groove 431 are closed together to form a clamping channel 40 for clamping the pipe A. The feeding support 41 is slidably connected to the machine base 1 so that the feeding support 41 can move between the pipe cutting mechanism 3 and the pipe bending mechanism 5. The machine base 1 is also provided with a sixth driving device 45 for driving the feeding support 41 to slide. The lower clamping plate 43 and the upper clamping plate 42 are closed together to clamp the pipe A. When the feeding support 41 moves, the clamped pipe A can be broken and made into a blank. For the subsequent processing of the pipe bending mechanism 5, the key point is that the pipe A is cut into a notch P in the working station of the pipe cutting mechanism 3, the upper clamping plate 42 and the lower clamping plate 43 are closed together to clamp the pipe A and then break it to make a blank, and then the blanks are transported to the pipe bending mechanism 5 one by one. Figure 6 As shown, the upper clamp 42 and the lower clamp 43 transport the blank A1 located in the front to the pipe bending mechanism 5 and bend the pipe in the pipe bending mechanism 5. At the same time, the upper clamp 42 and the lower clamp 43 continue to transport the blank A2 located behind the blank A1 forward, so that the blank A2 is pressed against the rear end of the blank A1, so that in the subsequent pipe bending process, the rear end face of the blank A1 can also perform a certain positioning effect.

[0040] The tube bending mechanism 5 is located at the feeding mechanism 4 and can bend the blank into a finished product. As a preferred embodiment of the tube cutting mechanism 3, Figures 5 to 8As shown, the pipe bending mechanism 5 includes a turning seat 51, a bending die assembly 50, a second driving device 52, a bending mandrel 53, a third driving device 54, a mandrel sleeve 52, and a fourth driving device 56. The machine base 1 is provided with a bending die assembly 50, and the bending die assembly 50 is provided with a clamping channel 501 for the pipe A to pass through, and a bending groove 502 which is connected to the clamping channel 501 and is partially arc-shaped. The pipe A passes through the clamping channel 501 from the rear and extends in front of the clamping channel 501. The turning seat 51 is rotatably connected to the machine base 1 and the rotation center is consistent with the center of the bending groove 502. The second driving device 52 is arranged between the machine base 1 and the turning seat 51 and is used to drive the turning seat 51 to rotate; the bending mandrel 53 is slidably connected to the turning seat 1 and ... The turning seat 51 is on the rotating seat 51 and can be inserted into the inner cavity of the pipe A passing through the clamping channel 501 after sliding, and the sliding trajectory of the bending mandrel 53 is basically tangent to the center line of the bending groove 502; the third driving device 54 is arranged on the turning seat 51 and is used to drive the bending mandrel 53 to slide; the mandrel sleeve 52 is slidably connected to the turning seat 51 and can be pressed against the end of the pipe A passing through the clamping channel 501 after sliding; the fourth driving device 56 is arranged on the turning seat 51 and is used to drive the mandrel sleeve 52 to slide. When the bending mandrel 53 of the pipe A is inserted into the inner cavity of the pipe A and the mandrel sleeve 52 is pressed against the end of the pipe A, the turning seat 51 rotates relative to the machine base so that the bending mandrel 53 and the mandrel sleeve 52 rotate around the center of the bending groove 502. When the tube bending mechanism 5 is working, the tube A passes through the clamping channel 501 from the rear and extends out from the front of the clamping channel 501. The third driving device 54 drives the tube bending mandrel 53 to slide so that the end of the tube bending mandrel 53 is inserted in front of the tube A. The fourth driving device 56 drives the mandrel sleeve 52 to slide so that the rear end surface of the mandrel sleeve 52 abuts against the front end of the mandrel sleeve 52. The second driving device 52 drives the turning seat 51 to rotate, and then drives the tube A to bend and deform around the tube bending groove 502 through the tube bending mandrel 53 and the mandrel sleeve 52, thereby realizing the tube bending function. The tube bending mandrel 53 abuts against the inner wall of the tube A. When the core rod sleeve 52 is pressed against the end of the pipe fitting A, the pipe fitting A is basically positioned when the pipe is bent. At the same time, the bending core rod 53 is pressed against the inner wall of the pipe fitting A, so that the wall thickness material of the pipe fitting A is evenly deformed during the bending process, and the outer wall of the pipe fitting A is not pressed by external force. Finally, during the bending process of the pipe fitting A, the friction force on both the inner wall and the outer wall is relatively small, so that the pipe fitting A can be unevenly deformed smoothly at the inner and outer bends. This deformation offsets the pre-inclined cut pipe end of the pipe fitting A, thereby manufacturing the bent pipe part at one time without the need for additional cutting of the pipe end. The process is simple, and the controllability and stability are high, thereby improving the quality and yield of the product.

[0041] In detail, Figure 7 and Figure 8As shown, the bending die assembly 50 includes a bending die support 57, to which a bending die member 58 is connected, and a clamping die member 59 which can move closer to or away from the bending die member 58 is slidably connected to the bending die support 57, and the bending die member 58 is provided with the bending pipe groove 502 and a first clamping die groove 581 connected to the bending pipe groove 502, and the clamping die member 59 is provided with a second clamping die groove 591 on the side close to the bending die member 58, and the machine base is also provided with a clamping die driving device 503 for pushing the clamping die member 59 toward the bending die member 58. Furthermore, in the present embodiment only, by controlling the stroke of the clamping die driving device 503, when the clamping die 59 approaches the bending die 58, the second clamping die groove 591 and the first clamping die groove 581 are combined to form the clamping channel 501, and the clamping channel 501 matches the shape of the pipe A or a gap is left between the clamping channel 501 and the pipe A, so that the clamping channel 501 can be sleeved on the outer wall of the pipe A without causing a large pre-tightening force on the pipe A, and a small pre-tightening pressure can also be appropriately applied to the pipe A so as not to affect the deformation of the pipe A.

[0042] In detail, Figure 7 and Figure 8 As shown, the core rod sleeve 52 is sleeved on the bending core rod 53 and can slide axially along the bending core rod 53, the first slide 504 is slidably connected to the flip seat 51, the bending core rod 53 is connected to the first slide 504, the output shaft of the third driving device 54 is connected to the first slide 504 and can push the first slide 504 to slide relative to the flip seat 51, the flip seat 51 is slidably connected to the second slide 505, the sliding direction of the second slide 505 is consistent with that of the first slide 504, the core rod sleeve 52 is connected to the second slide 505, and the output shaft of the fourth driving device 56 is connected to the second slide 505 and can push the second slide 505 to slide relative to the flip seat 51.

[0043] As a preferred solution of this embodiment, Figure 7 and Figure 8 As shown, the end of the bending mandrel 53 is provided with a first spherical arc surface 531 for pressing against the inner wall of the inner bend of the pipe fitting A on the side close to the bending groove 502, and the end of the bending mandrel 53 is provided with a second spherical arc surface 532 for pressing against the inner wall of the outer bend of the pipe fitting A on the side away from the bending groove 502, thereby reducing the friction force caused by the end of the bending mandrel 53 on the inner wall of the pipe fitting A, so that the deformation of the pipe fitting A is more uniform. Preferably, the radius of the second spherical arc surface 532 is R1, and the arc radius of the center line of the bending groove 502 is R2, then R1=R2, thereby making the end of the bending mandrel 53 exert a uniform support force on the inner wall of the pipe fitting A, while not affecting the material deformation of the inner wall of the pipe fitting A.

[0044] The unloading mechanism 6 has a discharge port 60, which can collect the finished products made by the bending mechanism 5 and transport them to the discharge port 60. As a preferred embodiment of the unloading mechanism 6, as shown in Fig.11 As shown, the unloading mechanism 6 includes a collection trough frame 61 arranged below the bending mechanism 5, and the bottom of the collection trough frame 61 is provided with an inclined discharge plate 62, and the collection trough frame 61 is provided with the discharge port 60 on the discharge plate 62. The collection trough frame 61 is provided with a plurality of discharge pipes 63 parallel to the discharge plate 62 on the upper surface of the discharge plate 62. When the bending mechanism 5 bends the pipe to form a finished product, it falls under the action of the subsequent blank push, and the finished product falls into the collection trough frame 61 and slides along the discharge pipe 63 to the discharge port 60, realizing automatic unloading.

[0045] Preferably, a straightening mechanism 7 is also provided on the machine base 1, and the straightening mechanism 7 is located in front of the feeding mechanism 2 and is used to straighten the pipe A, wherein the straightening mechanism 7 can adopt the patent scheme structure of the present invention with application number CN202323329052.7 and name of a long pipe straightening device.

[0046] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An automatic U-shaped tube bending device, characterized in that: The invention comprises a base (1), wherein the base (1) is provided with: A pipe cutting mechanism (3) capable of cutting an inclined cut on the outer wall of the pipe (A); A feeding mechanism (4) is capable of breaking the tube (A) to form a blank and then conveying the blank to a tube bending mechanism (5); The pipe bending mechanism (5) is located on the feeding mechanism (4) and is capable of bending the blank into a finished product.

2. The automatic U-shaped tube bending device according to claim 1 is characterized in that: The feeding mechanism (2) conveys the pipe (A) along the axis, and forms a feeding channel (100) on the machine base (1) for conveying the pipe (A). The pipe cutting mechanism (3) comprises a cutting assembly (30) capable of rotating around the feeding channel (100), and a first driving device (31) for driving the cutting assembly (30) to rotate. The rotation axis of the cutting assembly (30) forms an angle with the feeding channel (100). The cutting assembly (30) comprises a rotating seat (31). 2), the rotating seat (32) is provided with a sliding member (33) capable of sliding relative thereto, the sliding member (33) is provided with a cutting knife (34), the sliding member (33) is connected with a counterweight (35), the counterweight (35) and the cutting knife (34) are respectively located on both sides of the feeding channel (100), so that when the rotating seat (32) rotates, the counterweight (35) can pull the sliding member (33) to move, thereby causing the cutting knife (34) to move toward the center of the feeding channel (100).

3. The automatic U-shaped tube bending device according to claim 1 is characterized in that: The pipe bending mechanism (5) comprises a bending die assembly (50), the bending die assembly (50) is provided with a clamping channel (501) for the pipe member (A) to pass through, and an arc-shaped bending groove (502) connected to the clamping channel (501). The pipe bending mechanism (5) also comprises a turning seat (51) rotatably connected to the machine base (1) and having a rotation center consistent with the center of the bending groove (502), and a second driving device (52) arranged between the machine base (1) and the turning seat (51) and used to drive the turning seat (51) to rotate. A bending mandrel (53) is slidably connected to the flip seat (51) and can be inserted into the inner cavity of the pipe fitting (A) passing through the clamping channel (501) after sliding. The flip seat (51) is provided with a third driving device (54) for driving the bending mandrel (53) to slide. The flip seat (51) is slidably connected to the mandrel sleeve (55) and can be pressed against the end of the pipe fitting (A) passing through the clamping channel (501) after sliding. The rotating seat (32) is provided with a fourth driving device (56) for driving the mandrel sleeve (55) to slide.

4. The automatic U-shaped tube bending device according to claim 1 is characterized in that: The feeding mechanism (4) comprises a feeding support (41) connected to the machine base (1), an upper clamping plate (42) being connected to the feeding support (41), a lower clamping plate (43) being able to slide toward or away from the upper clamping plate (42) being connected to the feeding mechanism (4), a fifth driving device (44) for driving the lower clamping plate (43) to slide is also provided on the feeding support, a first pipe clamping groove (421) is provided on the bottom of the upper clamping plate (42), a second pipe clamping groove (431) is provided on the top of the lower clamping plate (43), and when the lower clamping plate (43) moves toward the upper clamping plate (42), the lower clamping plate (43) is moved to the lower clamping plate (43). After the movement, the first tube clamping groove (421) and the second tube clamping groove (431) are closed together to form a tube clamping channel (40) for clamping the tube (A). The feeding support (41) is slidably connected to the machine base (1) so that the feeding support (41) can move between the tube cutting mechanism (3) and the tube bending mechanism (5). The machine base (1) is also provided with a sixth driving device (45) for driving the feeding support (41) to slide. When the lower clamping plate (43) and the upper clamping plate (42) are closed together, the tube (A) is clamped. When the feeding support (41) moves, the clamped tube (A) can be broken and made into a blank.

5. The automatic U-shaped tube bending device according to claim 1 is characterized in that: The machine base (1) is also provided with a material discharge mechanism (6) for collecting the finished products made by the pipe bending mechanism (5) and conveying them to the discharge port (60). The material discharge mechanism (6) includes a material collection trough frame (61) arranged below the pipe bending mechanism (5). The bottom of the material collection trough frame (61) is provided with an inclined discharge plate (62). The material collection trough frame (61) is provided with the discharge port (60) on the discharge plate (62). The material collection trough frame (61) is provided with a plurality of discharge pipes (63) parallel to the discharge plate (62) on the upper surface of the discharge plate (62).

6. The automatic U-shaped tube bending device according to claim 1 is characterized in that: The machine base (1) is also provided with a feeding mechanism (2) for conveying the pipe (A), the feeding mechanism (2) comprising a feeding support (21) capable of moving along a conveying path of the pipe (A), and a seventh driving device (22) for driving the feeding support (21) to move, and the feeding support (21) is provided with a supporting hole (211) for the pipe (A) to pass through and for supporting the pipe (A).

7. The automatic U-shaped tube bending device according to claim 1 is characterized in that: The machine base (1) is also provided with a straightening mechanism (7), which is located in front of the feeding mechanism (2) and is used to straighten the pipe (A).

8. The automatic U-shaped tube bending device according to claim 2 is characterized in that: The machine base (1) is provided with an adjustment seat (36), the adjustment seat (36) is rotatably connected to the machine base (1) so that the adjustment seat (36) can swing relative to the machine base (1), and a locking structure (37) for locking the adjustment seat (36) is provided between the adjustment seat (36) and the machine base (1), and the cutting assembly (2) and the driving device (3) are both connected to the adjustment seat (36).

9. The non-fixed pipe bending mechanism according to claim 1, characterized in that: The end of the pipe bending mandrel (53) is provided with a second spherical arc surface (532) for pressing against the inner wall of the outer bend of the pipe fitting (A) on the side away from the pipe bending groove (502). The radius of the second spherical arc surface (512) is R1. The arc radius of the center line of the pipe bending groove (502) is R2, and R1=R2.

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