Bent pipe integrated die forming equipment and process

Abstract

The invention provides bent pipe integrated die forming equipment and process, the bent pipe integrated die forming equipment comprises an integrated front clamp, a three-layer split type rear guide, an integrated wheel die, a beam pipe clamp and a bent pipe core penetrating rod, the integrated front clamp and the three-layer split type rear guide are both arranged on the side face of the integrated wheel die, the bent pipe core penetrating rod is arranged on the inner side face of the integrated wheel die, and the beam pipe clamp is arranged on the inner side face of the integrated wheel die. And the beam tube frame is arranged at the rear end of the integrated wheel die. According to the bent pipe integrated die forming equipment and process, the bent pipe core penetrating rod is inserted into the pipe to support the inner wall, the situations that the inner side of the pipe is wrinkled due to compression stress in the bending process and the outer side of the pipe is thinned and even broken due to tensile stress are effectively prevented, and therefore the bending precision is guaranteed; and the size of the bent pipe is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe processing, and in particular to a pipe bending integral die forming device and process. Background Art

[0002] In the field of pipeline processing, small radius pipe bending faces many technical difficulties. When performing small radius bending, the inner side of the pipe will be subjected to compressive stress and the outer side will be subjected to tensile stress, which can easily cause wrinkles on the inner pipe wall and thinning or even rupture of the outer pipe wall. This problem is particularly prominent when the pipe wall is thin.

[0003] Traditional single-mold pipe bending equipment has difficulty providing effective support for the inner wall of the pipe, and therefore cannot guarantee bending accuracy. For pipes that require multiple bends of different radii, such as completing R20 and R30 bends in sequence, traditional processes usually use a segmented processing method, which requires multiple clamping and positioning. This method not only has low processing efficiency, but may also lead to the continuous accumulation of dimensional errors due to repeated clamping, making it difficult to meet the forming requirements of complex pipes.

[0004] In addition, the rear guide structure of existing pipe bending equipment is mostly fixed or simple sliding. During the small radius bending process, there is a lack of dynamic auxiliary thrust when the rear end of the pipe moves, which easily causes the problem of uneven transition of the bending arc and cannot adapt to the switching requirements of multi-layer mold cavities; traditional anti-wrinkle plates are mostly single-layer structures, which can only correspond to a single bending radius and cannot realize switching between different mold cavities, resulting in poor versatility of the equipment.

[0005] Therefore, it is necessary to provide a pipe bending integral mold forming device and process to solve the above technical problems. Summary of the Invention

[0006] The present invention provides a pipe bending integrated mold forming device and process, which solves the problems that traditional pipe bending equipment easily causes wrinkles on the inner wall and ruptures of the outer wall of the pipe when processing small radius pipe bending, has low bending accuracy, low processing efficiency, large dimensional errors, uneven bending curvature transition, and poor equipment versatility.

[0007] In order to solve the above technical problems, the present invention provides a pipe bending integrated mold forming device, comprising:

[0008] An integrated front clamp, a three-layer split rear guide, an integrated wheel mold, a tube clamp, and a tube bending mandrel. The integrated front clamp and the three-layer split rear guide are both arranged on the side of the integrated wheel mold, the tube bending mandrel is arranged on the inner side of the integrated wheel mold, and the tube binding rack is arranged at the rear end of the integrated wheel mold.

[0009] The integrated front clamp is used to fix the front end of the pipe to be bent; the three-layer split rear guide is used to guide the movement of the rear end of the pipe; the integrated wheel mold is used to bend the pipe; the pipe clamp is used to clamp the pipe; the bending rod is used to pass through the inside of the pipe and support the inner wall of the pipe during the bending process.

[0010] Preferably, a rear guide machine base connecting block is provided on one side of the three-layer split rear guide, and a rear guide fixing seat is provided on the other side of the three-layer split rear guide, and the outer side surface of the rear guide fixing seat is slidably connected to a rear guide movable connecting piece.

[0011] Preferably, the one-piece wheel mold is provided with an upper anti-wrinkle plate, a middle anti-wrinkle plate and a lower anti-wrinkle plate from top to bottom, the lower anti-wrinkle plate is provided with a mold cavity with a bending radius of R20, the middle anti-wrinkle plate is provided with a mold cavity with a bending radius of R30, and the upper anti-wrinkle plate is provided with a mold cavity with a bending radius of R60.

[0012] Preferably, a front clamp machine base connecting block is provided on one side of the integrated front clamp.

[0013] Preferably, a pull rod connecting block is provided on the top of the integrated wheel mold.

[0014] Preferably, the tube clamp includes a mounting ring, a driving telescopic part, an anti-overpressure component, a connecting part, a clamping block and a limiting component. The driving telescopic part is fixedly mounted on three sides of the mounting ring respectively, the anti-overpressure component is arranged at the moving end of the driving telescopic part, the connecting part is arranged at the bottom of the overpressure relief component, the clamping block is arranged on the outer side of the connecting part, and the limiting component is arranged at the top of the clamping block.

[0015] Preferably, the anti-overpressure assembly includes a fixed tube, an abutment block, a pressure sensor, a limit plate and a sliding rod, the abutment block is fixedly installed on the top of the inner side surface of the fixed tube, the limit plate is slidably connected to the inner side surface of the fixed tube, the pressure sensor is fixedly installed on the top of the limit plate, and the sliding rod is fixedly installed on the bottom of the limit plate.

[0016] Preferably, the top of the fixed tube is fixedly mounted on the movable end of the driving telescopic member, and the bottom of the sliding rod is fixedly mounted on the top of the connecting member.

[0017] Preferably, the limiting assembly includes an installation frame, a movable plate, a spring, a pulling plate and a clamping plate, the installation frame is fixedly arranged on the top of the clamping block, the movable plate is slidably connected to the inner side surface of the installation frame, the pulling plate is fixedly installed on the top of the movable plate, the spring is sleeved on the outer side surface of the pulling plate, the clamping plate is fixedly installed on the bottom of the movable plate, a clamping groove is provided on the top of the connecting piece, the bottom of the clamping plate is clamped to the inner side surface of the clamping groove, and a rubber pad is fixedly installed on the inner side surface of the clamping block.

[0018] To solve the above problems, the present invention also provides a process for forming a pipe bending integral mold, comprising the following steps:

[0019] S1. Equipment parameter setting and initialization: Turn on the main power of the equipment, set the bending speed and pressure parameters in the control system according to the specifications and bending radius of the pipe to be processed, calibrate the position of the lower anti-wrinkle plate of the integrated wheel die, and check whether the spring-assisted push-bending mechanism of the three-layer split rear guide is normal;

[0020] S2. Pipe installation and positioning: Fix the front end of the pipe to be bent with an integrated front clamp, and pass the rear end through the pipe clamp and clamp it; at the same time, insert the pipe bending mandrel into the pipe to support the inner wall of the pipe to prevent it from collapsing during bending;

[0021] S3, first layer bending and forming: Start the equipment, the three-layer split rear guide drives the rear end of the pipe to move through the rear guide movable connector, and cooperates with the lower anti-wrinkle plate of the integrated wheel mold to perform the first bend on the pipe, completing the R20 radius bending process;

[0022] S4, second layer bending forming: reposition the bent pipe to the middle layer anti-wrinkle plate, fix it again with the pipe clamp, start the equipment for the second bending, form an auxiliary bend section with a radius of R30, and ensure a smooth transition of the bend curvature;

[0023] S5. Subsequent bending process: If multiple bending sections are required, move the pipe to the upper anti-wrinkle plate or repeat the above steps. The spring-assisted bending structure of the three-layer split rear guide is used to complete the forming of the subsequent 2-3 bending sections in sequence. The position of the pipe in the mold cavity needs to be adjusted before each bending.

[0024] S6. Pipe removal and inspection: After the bending process is completed, loosen the tube clamp and the integrated front clamp, remove the tube and remove the bending rod; inspect the size, curvature and surface quality of the formed bent tube to ensure that the bending radius error does not exceed ±0.5mm and there are no defects such as wrinkles and cracks on the tube wall.

[0025] Compared with related technologies, the pipe bending integral mold forming equipment and process provided by the present invention have the following beneficial effects:

[0026] The present invention provides a pipe bending integrated mold forming device and process, which inserts a pipe bending mandrel into the pipe to support the inner wall, effectively preventing the pipe from wrinkling on the inside due to compressive stress and thinning or even cracking on the outside due to tensile stress during the bending process, thereby ensuring bending accuracy and making the size of the bent pipe more accurate.

[0027] The equipment adopts an integrated molding process. For pipes that need to be bent in multiple sections with different radii, there is no need for multiple clamping and positioning, which reduces the number of clamping times and avoids the time waste caused by repeated clamping. It greatly improves processing efficiency. In addition, since the number of repeated clamping is reduced, the accumulation of dimensional errors is avoided, making the size of the bent pipe more stable and able to meet the molding requirements of complex pipes.

[0028] The three-layer split rear guide is equipped with a spring-assisted bending mechanism, which can provide dynamic auxiliary thrust for the movement of the rear end of the pipe during small radius bending, so that the force on the pipe is more uniform during the bending process, thereby ensuring a smooth transition of the bending arc and avoiding the problem of discontinuous arc caused by uneven force;

[0029] The one-piece wheel die is equipped with an upper anti-wrinkle plate, a middle anti-wrinkle plate and a lower anti-wrinkle plate from top to bottom, corresponding to the R60, R30 and R20 mold cavities respectively; by switching different anti-wrinkle plates and mold cavities, the equipment can adapt to the processing requirements of pipe bending with different bending radii without replacing the entire mold, greatly enhancing the versatility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a first embodiment of a pipe bending integrated die forming device provided by the present invention;

[0031] Figure 2 for Figure 1 The side structure diagram shown;

[0032] Figure 3 for Figure 1 The back structure diagram shown;

[0033] Figure 4 A schematic structural diagram of a second embodiment of a pipe bending integral mold forming device provided by the present invention;

[0034] Figure 5 for Figure 4 Another perspective structural diagram shown;

[0035] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure of the clamping block and the connecting piece shown;

[0036] Figure 7 for Figure 6An enlarged schematic diagram of part A is shown;

[0037] Figure 8 for Figure 5 The schematic diagram of the cross-sectional structure of the overpressure protection component is shown.

[0038] Numbers in the figure: 1. Rear guide base connecting block, 2. Integrated front clamp, 3. Three-layer split rear guide, 31. Rear guide movable connecting piece, 32. Rear guide fixed seat, 4. Integrated wheel mold, 41. Upper anti-wrinkle plate, 42. Middle anti-wrinkle plate, 43. Lower anti-wrinkle plate, 5. Tube clamp, 6. Bend pipe through-rod, 7. Front clamp base connecting block, 8. Pull rod connecting block, 51. Mounting ring, 52. Drive telescopic part, 53. Anti-overpressure component, 531. Fixed tube, 532. Abutment block, 533. Pressure sensor, 534. Limiting plate, 535. Sliding rod, 54. Connecting piece, 541. Snap-fit ​​groove, 55. Clamping block, 551. Rubber pad, 56. Limiting assembly, 561. Mounting frame, 562. Moving plate, 563. Spring, 564. Pulling plate, 565. Snap-fit ​​plate. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] First embodiment

[0041] Please refer to Figure 1 、 Figure 2 、 Figure 3 ,in, Figure 1 A schematic structural diagram of a first embodiment of a pipe bending integrated die forming device provided by the present invention; Figure 2 for Figure 1 The side structure diagram shown;

[0042] Figure 3 for Figure 1 A tube bending integrated mold forming device, comprising: an integrated front clamp 2, a three-layer split rear guide 3, an integrated wheel mold 4, a tube clamp 5, and a tube bending mandrel 6. The integrated front clamp 2 and the three-layer split rear guide 3 are both disposed on the side of the integrated wheel mold 4, the tube bending mandrel 6 is disposed on the inner side of the integrated wheel mold 4, and the tube binding rack 5 is disposed at the rear end of the integrated wheel mold 4.

[0043] The integrated front clamp 2 is used to fix the front end of the pipe to be bent; the three-layer split rear guide 3 is used to guide the movement of the rear end of the pipe; the integrated wheel mold 4 is used to bend the pipe; the pipe clamp 5 is used to clamp the pipe; the bending core rod 6 is used to pass through the inside of the pipe and support the inner wall of the pipe during the bending process.

[0044] A rear guide base connection block 1 is provided on one side of the three-layer split rear guide 3 , and a rear guide fixing seat 32 is provided on the other side of the three-layer split rear guide 3 . A rear guide movable connecting piece 31 is slidably connected to the outer side of the rear guide fixing seat 32 .

[0045] The integrated wheel mold 4 is provided with an upper anti-wrinkle plate 41, an intermediate anti-wrinkle plate 42 and a lower anti-wrinkle plate 43 from top to bottom. A mold cavity with a bending radius of R20 is provided in the lower anti-wrinkle plate 43, a mold cavity with a bending radius of R30 is provided in the intermediate anti-wrinkle plate 42, and a mold cavity with a bending radius of R60 is provided in the upper anti-wrinkle plate 41.

[0046] A front clamp base connecting block 7 is provided on one side of the integrated front clamp 2 .

[0047] A pull rod connecting block 8 is provided on the top of the integrated wheel mold 4 .

[0048] The working principle of the pipe bending integrated mold forming equipment provided by the present invention is as follows:

[0049] Equipment parameter setting and initialization: Turn on the main power of the equipment, and set the appropriate bending speed and pressure parameters in the control system according to the specifications of the pipe to be processed and the required bending radius; calibrate the position of the lower anti-wrinkle plate 43 of the integrated wheel die 4, and check whether the spring-assisted bending mechanism of the three-layer split rear guide 3 is operating normally, preparing for the subsequent pipe bending process;

[0050] Pipe installation and positioning: The front end of the pipe to be bent is fixed with the integrated front clamp 2 to ensure that the front end of the pipe does not move during the processing; the rear end of the pipe is passed through the pipe clamp 5 and clamped to fix the rear end of the pipe; at the same time, the bending rod 6 is inserted into the pipe to support the inner wall of the pipe, thereby effectively preventing the inner wall of the pipe from collapsing during the bending process;

[0051] First layer bending: The equipment is started, and the three-layer split rear guide 3 drives the rear end of the pipe to move through the rear guide movable connector 31. During the movement, the lower anti-wrinkle plate 43 of the integrated wheel die 4 cooperates with the pipe to perform the first bend, completing the bending process with a radius of R20. At this time, the R20 mold cavity set in the lower anti-wrinkle plate 43 plays a role in shaping the bending shape of the pipe.

[0052] Second layer bending: After the first layer of bending, the pipe is repositioned to the middle layer anti-wrinkle plate 42 and fixed again with the pipe clamp 5 to ensure the correct position of the pipe during the second bending process. The equipment is started to perform the second bending, forming an auxiliary bend with a radius of R30. The R30 cavity of the middle layer anti-wrinkle plate 42 ensures the curvature and shape of this bend, making the curvature transition of the bend smoother.

[0053] Subsequent bending process: If multiple bends are required, the tube is moved to the upper anti-wrinkle plate 41 or the above steps are repeated. With the help of the spring-assisted bending structure of the three-layer split rear guide 3, the subsequent 2-3 bends are formed in sequence. Before each bend, the position of the tube in the mold cavity needs to be carefully adjusted to ensure the bending accuracy and quality of each bend.

[0054] Pipe removal and inspection: After all bending processes are completed, loosen the tube clamp 5 and the integrated front clamp 2, remove the tube, and remove the tube core rod 6 inserted into the tube. The size, curvature and surface quality of the formed tube are inspected. The bending radius error is required to be no more than ±0.5mm, and the tube wall must not have defects such as wrinkles and cracks to ensure that the quality of the bent tube meets the requirements.

[0055] Compared with the related art, the pipe bending integral mold forming equipment provided by the present invention has the following beneficial effects:

[0056] The inner wall of the pipe is supported by inserting the bending rod 6 into the pipe, which effectively prevents the inner side of the pipe from wrinkling due to compression stress and the outer side from thinning or even breaking due to tensile stress during the bending process, thereby ensuring the bending accuracy and making the size of the bent pipe more accurate.

[0057] The equipment adopts an integrated molding process. For pipes that need to be bent in multiple sections with different radii, there is no need for multiple clamping and positioning, which reduces the number of clamping times and avoids the time waste caused by repeated clamping. It greatly improves processing efficiency. In addition, since the number of repeated clamping is reduced, the accumulation of dimensional errors is avoided, making the size of the bent pipe more stable and able to meet the molding requirements of complex pipes.

[0058] The three-layer split rear guide 3 is equipped with a spring-assisted bending mechanism, which can provide dynamic auxiliary thrust for the movement of the rear end of the pipe during small radius bending, so that the force on the pipe is more uniform during the bending process, thereby ensuring a smooth transition of the bending arc and avoiding the problem of discontinuous arc caused by uneven force;

[0059] The integrated wheel mold 4 is provided with an upper anti-wrinkle plate 41, a middle anti-wrinkle plate 42 and a lower anti-wrinkle plate 43 from top to bottom, corresponding to the mold cavities of R60, R30 and R20 respectively; by switching different anti-wrinkle plates and mold cavities, the equipment can adapt to the processing requirements of pipe bending with different bending radii without replacing the entire mold, which greatly enhances the versatility of the equipment.

[0060] Second embodiment

[0061] Please refer to Figure 2 、 Figure 3 and Figure 5Based on the one-piece bending tube mold forming device and process provided in the first embodiment of this application, the second embodiment of this application provides another one-piece bending tube mold forming device and process. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0062] Specifically, the difference of the one-piece mold forming equipment and process for bending tubes provided in the second embodiment of the present application is that, in a one-piece mold forming equipment and process for bending tubes, the tube clamp 5 includes a mounting ring 51, a driving telescopic part 52, an anti-overpressure component 53, a connecting part 54, a clamping block 55 and a limiting component 56. The driving telescopic part 52 is fixedly installed on three sides of the side of the mounting ring 51, the anti-overpressure component 53 is arranged at the moving end of the driving telescopic part 52, the connecting part 54 is arranged at the bottom of the overpressure relief component 53, the clamping block 55 is arranged on the outer side of the connecting part 54, and the limiting component 56 is arranged at the top of the clamping block 55.

[0063] The anti-overpressure assembly 53 includes a fixed tube 531, an abutment block 532, a pressure sensor 533, a limit plate 534 and a sliding rod 535. The abutment block 532 is fixedly installed on the top of the inner side of the fixed tube 531, the limit plate 534 is slidably connected to the inner side of the fixed tube 531, the pressure sensor 533 is fixedly installed on the top of the limit plate 534, and the sliding rod 535 is fixedly installed on the bottom of the limit plate 534.

[0064] The top of the fixed tube 531 is fixedly mounted on the moving end of the driving telescopic member 52 , and the bottom of the sliding rod 535 is fixedly mounted on the top of the connecting member 54 .

[0065] The limiting assembly 56 includes a mounting frame 561, a movable plate 562, a spring 563, a pulling plate 564 and a clamping plate 565. The mounting frame 561 is fixedly arranged on the top of the clamping block 55, the movable plate 562 is slidably connected to the inner side surface of the mounting frame 561, the pulling plate 564 is fixedly installed on the top of the movable plate 562, the spring 563 is sleeved on the outer side surface of the pulling plate 564, the clamping plate 565 is fixedly installed on the bottom of the movable plate 562, a clamping groove 541 is opened on the top of the connecting member 54, the bottom of the clamping plate 565 is clamped on the inner side surface of the clamping groove 541, and the inner side surface of the clamping block 55 is fixedly installed with a rubber pad 551.

[0066] When it is necessary to disassemble the clamping block 55, the user only needs to lift the pulling plate 564 upwards, which can drive the movable plate 562 and the clamping plate 565 to move upwards, thereby compressing the spring 563 and accumulating force. At this time, the user can move the clamping block 55 to separate the clamping block 55 and the connecting member 54, thereby facilitating the user to disassemble the clamping block 55.

[0067] The pressure sensor 533 can adjust the pressure threshold when in use. When the pressure threshold is exceeded, the pressure sensor 533 can automatically send an instruction to the driving telescopic member 52 to stop the driving telescopic member 52 from extending.

[0068] The working principle of the pipe bending integrated mold forming equipment and process provided by the present invention is as follows:

[0069] When the device is running, the driving telescopic member 52 is started, and its moving end pushes the fixed tube 531 in the anti-overpressure assembly 53 forward. The abutment block 532 in the fixed tube 531 contacts the pressure sensor 533. At the same time, the limit plate 534 slides along the inner side of the fixed tube 531, driving the sliding rod 535 at the bottom to push the connecting member 54, so that the clamping block 55 fixed on the outer side of the connecting member 54 moves toward the pipe to achieve clamping; in this process, the pressure sensor 533 monitors the clamping pressure in real time. When the pressure exceeds the preset threshold, it will transmit an electrical signal to the driving telescopic member 52, causing the driving telescopic member 52 to stop extending, avoiding excessive clamping force and causing damage and deformation of the pipe; the rubber pad 551 on the inner side of the clamping block 55 increases the friction with the pipe through elastic contact, which can not only ensure that the pipe is firmly clamped, but also buffer the clamping force to prevent scratches on the pipe surface, thereby achieving accurate and safe clamping of the pipe.

[0070] Compared with related technologies, the pipe bending integral mold forming equipment and process provided by the present invention have the following beneficial effects:

[0071] The clamping pressure is monitored in real time by the pressure sensor 533 in the overpressure prevention assembly 53. When the pressure exceeds the set value, a stop extension instruction is sent to the driving telescopic member 52 to prevent deformation, surface scratches or cracks of the pipe due to excessive clamping force, thereby effectively improving the surface quality and dimensional accuracy of the bent pipe.

[0072] Through the cooperation of the limiting assembly 56, the connecting piece 54 and the clamping block 55, when in use, it is only necessary to lift the pulling plate 564 upwards, driving the movable plate 562 and the clamping plate 562 to move upwards, so that the clamping plate 565 can be moved out from the inner side of the clamping groove 541, thereby facilitating the user to disassemble and replace the clamping block 55.

[0073] To solve the above problems, the present invention also provides a process for forming a pipe bending integral mold, comprising the following steps:

[0074] S1. Equipment parameter setting and initialization: Turn on the main power of the equipment, set the bending speed and pressure parameters in the control system according to the specifications and bending radius of the pipe to be processed, calibrate the position of the lower anti-wrinkle plate 43 of the integrated wheel die 4, and check whether the spring-assisted push-bending mechanism of the three-layer split rear guide 3 is normal;

[0075] S2. Pipe installation and positioning: Secure the front end of the pipe to be bent with the integrated front clamp 2, and pass the rear end through the pipe clamp 5 and clamp it. At the same time, insert the pipe bending rod 6 into the pipe to support the inner wall of the pipe to prevent it from collapsing during bending.

[0076] S3, first layer bending forming: Start the equipment, the three-layer split rear guide 3 drives the rear end of the pipe to move through the rear guide movable connector 31, and cooperates with the lower wrinkle-proof plate 43 of the integrated wheel die 4 to perform the first bend on the pipe, completing the R20 radius bending process;

[0077] S4, second layer bending forming: the bent pipe is repositioned to the middle layer anti-wrinkle plate 42, fixed again by the pipe clamp 5, and the equipment is started to perform a second bending to form an auxiliary bend section with a radius of R30 to ensure a smooth transition of the bend curvature;

[0078] S5, subsequent bending process: If multiple bending sections are required, the pipe is moved to the upper anti-wrinkle plate 41 or the above steps are repeated. The spring-assisted bending structure of the three-layer split rear guide 3 is used to sequentially complete the forming of the subsequent 2-3 bending sections. The position of the pipe in the mold cavity needs to be adjusted before each bending.

[0079] S6. Tube removal and inspection: After the bending process is completed, loosen the tube clamp 5 and the integrated front clamp 2, remove the tube and remove the tube core rod 6; inspect the size, curvature and surface quality of the formed tube to ensure that the bending radius error does not exceed ±0.5mm and there are no defects such as wrinkles and cracks on the tube wall.

[0080] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pipe bending integrated mold forming device, characterized in that: include: An integrated front clamp, a three-layer split rear guide, an integrated wheel mold, a tube clamp, and a tube bending mandrel. The integrated front clamp and the three-layer split rear guide are both arranged on the side of the integrated wheel mold, the tube bending mandrel is arranged on the inner side of the integrated wheel mold, and the tube binding rack is arranged at the rear end of the integrated wheel mold. The integrated front clamp is used to fix the front end of the pipe to be bent; the three-layer split rear guide is used to guide the movement of the rear end of the pipe; the integrated wheel mold is used to bend the pipe; the pipe clamp is used to clamp the pipe; the bending rod is used to pass through the inside of the pipe and support the inner wall of the pipe during the bending process.

2. The one-piece bending tube molding equipment according to claim 1, characterized in that: A rear guide machine base connection block is provided on one side of the three-layer split rear guide, and a rear guide fixing seat is provided on the other side of the three-layer split rear guide. The outer side surface of the rear guide fixing seat is slidably connected with a rear guide movable connecting piece.

3. The tube bending integral mold forming equipment according to claim 1, characterized in that: The one-piece wheel mold is provided with an upper anti-wrinkle plate, a middle anti-wrinkle plate and a lower anti-wrinkle plate from top to bottom. A mold cavity with a bending radius of R20 is provided in the lower anti-wrinkle plate, a mold cavity with a bending radius of R30 is provided in the middle anti-wrinkle plate, and a mold cavity with a bending radius of R60 is provided in the upper anti-wrinkle plate.

4. The tube bending integral mold forming equipment according to claim 1, characterized in that: A front clamp machine base connecting block is provided on one side of the integrated front clamp.

5. The tube bending integral mold forming equipment according to claim 1, characterized in that: A pull rod connecting block is provided on the top of the integrated wheel mold.

6. The tube bending integral mold forming equipment according to claim 1, characterized in that: The tube clamp includes a mounting ring, a driving telescopic part, an anti-overpressure component, a connecting part, a clamping block and a limiting component. The driving telescopic part is fixedly mounted on three sides of the mounting ring, the anti-overpressure component is arranged at the moving end of the driving telescopic part, the connecting part is arranged at the bottom of the overpressure relief component, the clamping block is arranged on the outer side of the connecting part, and the limiting component is arranged on the top of the clamping block.

7. The integrated tube bending mold forming equipment according to claim 6, characterized in that: The anti-overpressure assembly includes a fixed tube, an abutment block, a pressure sensor, a limit plate and a sliding rod. The abutment block is fixedly installed on the top of the inner side surface of the fixed tube, the limit plate is slidably connected to the inner side surface of the fixed tube, the pressure sensor is fixedly installed on the top of the limit plate, and the sliding rod is fixedly installed on the bottom of the limit plate.

8. The integrated tube bending mold forming device according to claim 7, characterized in that: The top of the fixed tube is fixedly mounted on the movable end of the driving telescopic member, and the bottom of the sliding rod is fixedly mounted on the top of the connecting member.

9. The tube bending integral mold forming equipment according to claim 6, characterized in that: The limiting assembly includes an installation frame, a movable plate, a spring, a pulling plate and a clamping plate. The installation frame is fixedly arranged on the top of the clamping block, the movable plate is slidably connected to the inner side surface of the installation frame, the pulling plate is fixedly installed on the top of the movable plate, the spring is sleeved on the outer side surface of the pulling plate, the clamping plate is fixedly installed on the bottom of the movable plate, a clamping groove is provided on the top of the connecting piece, the bottom of the clamping plate is clamped on the inner side surface of the clamping groove, and a rubber pad is fixedly installed on the inner side surface of the clamping block.

10. The process of the pipe bending integral mold forming equipment according to claim 1, characterized in that: The following steps are involved: S1. Equipment parameter setting and initialization: Turn on the main power of the equipment, set the bending speed and pressure parameters in the control system according to the specifications and bending radius of the pipe to be processed, calibrate the position of the lower anti-wrinkle plate of the integrated wheel die, and check whether the spring-assisted push-bending mechanism of the three-layer split rear guide is normal; S2. Pipe installation and positioning: Fix the front end of the pipe to be bent with an integrated front clamp, and pass the rear end through the pipe clamp and clamp it; at the same time, insert the pipe bending mandrel into the pipe to support the inner wall of the pipe to prevent it from collapsing during bending; S3, first layer bending and forming: Start the equipment, the three-layer split rear guide drives the rear end of the pipe to move through the rear guide movable connector, and cooperates with the lower anti-wrinkle plate of the integrated wheel mold to perform the first bend on the pipe, completing the R20 radius bending process; S4, second layer bending forming: reposition the bent pipe to the middle layer anti-wrinkle plate, fix it again with the pipe clamp, start the equipment for the second bending, form an auxiliary bend section with a radius of R30, and ensure a smooth transition of the bend curvature; S5. Subsequent bending process: If multiple bending sections are required, move the pipe to the upper anti-wrinkle plate or repeat the above steps. The spring-assisted bending structure of the three-layer split rear guide is used to complete the forming of the subsequent 2-3 bending sections in sequence. The position of the pipe in the mold cavity needs to be adjusted before each bending. S6. Pipe removal and inspection: After the bending process is completed, loosen the tube clamp and the integrated front clamp, remove the tube and remove the bending rod; inspect the size, curvature and surface quality of the formed bent tube to ensure that the bending radius error does not exceed ±0.5mm and there are no defects such as wrinkles and cracks on the tube wall.

Images