Pipe bending structure and pipe straightening machine

Abstract

The utility model discloses a kind of elbow structure and whole pipe machine, belong to radiator processing field.The whole pipe machine includes lathe, elbow assembly and shaping assembly, elbow assembly and shaping assembly are fixedly arranged on the work platform of lathe, shaping assembly is arranged at the side of elbow assembly;Elbow assembly includes mould one, mould two, mould one and mould two articulated constitute elbow stationary wheel, the inner side surface of mould one and the inner side surface of mould two form angle, mould one and mould two can rotate relatively around articulation point;The outer side surface of mould one and the outer side surface of mould two are all camber surface, and camber surface jointly constitutes the circular arc surface of smooth transition, the diameter of circular arc surface is greater than the inner diameter of the shaping bending part to be shaped;The elbow structure of the utility model is adjustable shaping mould, and the whole pipe machine using the elbow structure can be quickly and accurately docked with target bending part, reduce installation docking difficulty, improve operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of radiator processing, and in particular to a pipe bending structure and a pipe straightening machine. Background Technology

[0002] Finned coil radiators are widely used in various industrial and civil applications. They achieve efficient heat transfer and dissipation through the effective combination of fins and coils. To effectively reduce the negative impact of solder joints in existing coil designs, an integrated bending forming technology has been proposed. This innovative design method significantly improves the overall performance of the coil, optimizing its performance and lifespan.

[0003] As equipment is constantly being replaced, its heat dissipation requirements also change. For example, early finned aluminum tube radiators were usually products with two rows of aluminum tubes. In order to improve the heat dissipation efficiency of the radiator, the design of the two-row product was changed to a four-row product. The initial four-row product was arranged by stacking two two-row products, which required two productions to meet the needs of one four-row product. In order to ensure the connection of the two products' pipes, the two adjacent tail bends (U-bends) needed to be welded together.

[0004] To achieve bends of varying curvatures on a one-piece molded coil, the curvature parameters of the bending die must be continuously adjusted during the entire tube-making process to ensure that adjacent bends are formed according to the preset curvature. This method is not only inefficient and unable to meet the needs of mass production, but also requires high-precision manual intervention and is prone to poor product consistency due to operational errors, increasing the scrap rate.

[0005] To improve efficiency, existing technical solutions have abandoned the one-piece molding approach and still use welding to weld pipe sections of different curvatures. However, the welds have problems such as stress concentration and poor corrosion resistance, which affect the overall performance and service life of the radiator. In addition, an extra weld treatment process is required after welding, which increases production costs. Utility Model Content

[0006] The technical problem to be solved by this utility model is: in order to solve the problems of low production efficiency and poor product consistency caused by the difficulty in adjusting the bending arc in the prior art, this utility model provides a bending pipe structure and a pipe straightening machine using the bending pipe structure, which can perform targeted shaping on the integrally formed coil to adapt it to the layout requirements of the new product.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a pipe straightening machine, including a machine tool, a pipe bending assembly and a shaping assembly, wherein the pipe bending assembly and the shaping assembly are fixedly mounted on the working platform of the machine tool, and the shaping assembly is mounted on one side of the pipe bending assembly; in: The machine tool is used to support and fix the various components; The pipe bending assembly includes mold one and mold two. Mold one and mold two are hinged together to form a stationary bending wheel. The hinge points of mold one and mold two are located on the same straight line, and this straight line is parallel to the axis of the stationary bending wheel. The inner surface of mold one and the inner surface of mold two form an angle. Mold one and mold two can rotate relative to each other around the hinge point. The outer surface of mold one and the outer surface of mold two are both arc surfaces, and the arc surfaces together form a smoothly transitioned arc surface. The diameter of the arc surface is larger than the inner diameter of the part to be shaped and bent. The shaping component includes a corrector that can move horizontally. One side of the corrector has an arc-shaped groove that matches the outer wall of the coil bending section. This groove is used to accurately position and limit the target position during the shaping process to prevent deformation and displacement. Therefore, when the stationary bending wheel is closed, that is, when the inner sides of mold one and mold two are in contact with each other, the maximum diameter of the stationary bending wheel is smaller than the bent part of the coil to be shaped. Thus, the stationary bending wheel can quickly extend into the inner space of the coil bend from below without damaging the coil surface. When the stationary bending wheel is opened, that is, when mold one and mold two rotate open around the hinge line, the arc surface formed by it applies uniform pressure to the inner side of the coil bend radially, achieving local plastic expansion. At the same time, the correction component moves, causing the bend to enter the arc-shaped groove, thereby accurately correcting the outer side of the bend to be shaped. Through the joint squeezing action of the stationary bending wheel and the correction component, the U-bend of the bend to be shaped becomes larger.

[0008] Furthermore, both mold one and mold two are cylindrical structures. The arc surfaces of mold one and mold two are provided with annular grooves. After the annular grooves are joined together, they form an annular positioning groove for accommodating the bent part of the coil. One side of mold one and one side of mold two are tenon-and-mortise joints, and the tenon joints are hinged by a pin to achieve stable opening and closing movements. Thus, the tenon-and-mortise joint structure ensures that the molds are accurately aligned during the opening and closing process, avoiding shaking or misalignment, improving the shaping stability, and ensuring the continuity and fit of the arc surface, making the pressure distribution more uniform.

[0009] Furthermore, the pipe bending assembly also includes a driving component, which is connected to mold one and / or mold two via a transmission mechanism, so that mold one and / or mold two can rotate circumferentially around the hinge.

[0010] Furthermore, the output end of the driving component is a movable rod, and the end of the movable rod away from the driving component is hinged to two connecting rods. The bottom of the first mold is provided with a first hinge seat, and the bottom of the second mold is provided with a second hinge seat. The side of the first hinge seat is hinged to a connecting rod, and the side of the second hinge seat is hinged to another connecting rod. The driving component drives the connecting rod to push the first mold and the second mold to open and close synchronously through telescopic movement, so as to realize automatic adjustment of the included angle.

[0011] Furthermore, the pipe bending assembly also includes a lower support, an upper support, a mounting cavity, and a movable cavity. The lower support and the upper support are symmetrically overlapped and fixedly installed on one side of the driving component. One end of the mounting cavity extends vertically through the lower support and the upper support. The movable cavity is located between the lower support and the upper support, with one end extending horizontally to the outside of the lower and upper support. The movable cavity is connected to the mounting cavity. The first hinge seat and the second hinge seat are located within the movable cavity, and the column of mold one and the column of mold two are located within the mounting cavity. Thus, the lower support and the upper support together form a stable load-bearing structure for the drive component and the mold assembly. The mounting cavity provides vertical limiting guidance for the mold, while the movable cavity allows the hinge seat to move smoothly in the horizontal direction, ensuring smooth and synchronous opening and closing actions.

[0012] Furthermore, the bottom of the lower support is fixed to the machine tool, and the bottom of the upper support has a groove 1, one end of which extends toward the driving component and passes through the upper support; the top of the lower support has a groove 2, one end of which extends toward the driving component and passes through the lower support; the groove 1 and groove 2 are arranged opposite to each other, together forming a mounting cavity for accommodating the movable rod, and the mounting cavity is connected to the movable cavity; thus, the movable rod can smoothly extend and retract within the mounting cavity, avoiding off-center load resistance, and forming an effective transmission linkage with the connecting rod; the symmetrical design of the groove 1 and groove 2 ensures that the movable rod moves in the center.

[0013] Furthermore, a limiting post is fixedly installed on the top of the lower support seat. The limiting post is located between the first hinge seat and the second hinge seat. The limiting post is vertically arranged, and the end away from the lower support seat passes through the movable cavity and is fixedly connected to the bottom of the upper support seat to form a rigid support structure. Thus, when the upper support seat and the lower support seat are connected by bolts, the limiting post can effectively prevent the cavity size of the movable cavity from changing due to the tightening of the screws, thereby ensuring that the movement of mold one and mold two will not be jammed.

[0014] Furthermore, the shaping assembly also includes a movable seat and a pneumatic push rod. The end face of the corrector is detachably connected to the movable seat, the bottom of the movable seat is slidably connected to the machine tool, and the piston rod of the pneumatic push rod is connected to the movable seat, driving the movable seat to reciprocate along the sliding direction, thereby causing the corrector to move closer to or away from the bent tube workpiece.

[0015] Furthermore, a base plate is fixedly installed on the top of the machine tool, and a support frame and a guide rail are fixedly installed sequentially on the base plate along its long side. The bottom of the movable seat is slidably engaged with the guide rail, and the support frame is used to install a pneumatic push rod. The bottom of the lower support seat is fixedly connected to the base plate, and the guide rail is disposed between the lower support seat and the support frame.

[0016] Furthermore, a placement platform for supporting the bent tube workpiece to be processed is fixedly installed on the top of the machine tool. The placement platform has a gantry structure and spans across the drive component. The ends of mold one and mold two that are away from the base plate are higher than the top surface of the placement platform to ensure that the bent tube workpiece is not interfered with during the forming process.

[0017] Furthermore, the column of the placement platform is a telescopic structure; thus, the workpiece to be processed is installed on the top surface of the placement platform, and by adjusting the height of the column, mold one and mold two can quickly extend into the curved section of the workpiece to be processed, thereby achieving automatic and precise alignment.

[0018] Furthermore, the top surface of the placement platform is provided with a positioning groove, which is shaped to fit the shape of the workpiece; thereby effectively fixing the bent pipe workpiece.

[0019] The beneficial effects of this utility model are as follows: This utility model uses a tube straightening machine to perform targeted shaping operations on the integrally formed coil. The specific technical solution is to perform integral forming and bending treatment of the coil with a small bending arc, and then use the tube straightening machine to expand and adjust the bending arc of the formed coil accordingly, thereby meeting diverse heat dissipation needs. Compared with the traditional segmented welding process, this solution effectively avoids weld defects and improves the overall structure and heat conduction efficiency. Compared with the joint forming method in the bending forming process, this solution combines pre-forming and post-forming, which is more suitable for working conditions where there is a significant difference between the number of large and small bending parts, effectively reducing the labor intensity of employees and improving production efficiency and safety.

[0020] The present invention relates to a stationary roller for bending tubes, which is composed of a first mold and a second mold hinged together. The first mold and the second mold rotate relative to each other around the hinge point to change the included angle. That is, by dynamically adjusting the diameter of the stationary roller for bending tubes, the side of the stationary roller for bending tubes can be made to fit and separate from the bent section of the workpiece, so as to achieve rapid material removal and improve demolding efficiency. At the same time, this structural design ensures that demolding can be carried out without damage even in narrow processing spaces.

[0021] The tube straightening machine of this utility model adopts the above-mentioned tube bending stationary wheel, which can quickly and without damage insert into the bending section of the integrally formed coil. The maximum diameter of the tube bending stationary wheel is greater than the diameter of the bending section of the coil. When the tube bending stationary wheel is opened, its maximum diameter is at its maximum value. The arc surface formed by mold one and mold two applies uniform pressure to the outer wall of the coil bending part in the radial direction, pushing the bending section to expand outward, thereby shaping and increasing the inner diameter of the bending section.

[0022] The pipe straightening machine of this utility model is equipped with a straightening component. The straightening component restricts the outward expansion of the bent section of the coil, ensuring that the expansion process is controllable and does not cause excessive deformation. When the bending stationary wheel is opened, the straightening component advances and squeezes the aluminum tube, thereby shaping and increasing the radius of the bent section of the coil, ensuring that the shaped pipe has a consistent curvature and no local distortion. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the pipe straightening machine in Example 1.

[0025] Figure 2 yes Figure 1 Assembly diagram of the middle bend assembly and the shaping assembly.

[0026] Figure 3 yes Figure 2 A three-dimensional schematic diagram of the middle bend pipe assembly.

[0027] Figure 4 yes Figure 3 Assembly diagram of the middle bend pipe assembly.

[0028] Figure 5 yes Figure 3 Assembly drawing of the upper and lower support bases.

[0029] Figure 6 yes Figure 3 A three-dimensional schematic diagram of the stationary wheel of the bent tube formed by the hinge of mold one and mold two.

[0030] Figure 7 This is a three-dimensional schematic diagram of the connection between the stationary wheel of the bent tube and the driving component in Embodiment 1.

[0031] Figure 8 This is a three-dimensional schematic diagram of the shaping component in Embodiment 1.

[0032] Figure 9 This is a planar schematic diagram of the fin structure.

[0033] Figure 10 This is a three-dimensional structural diagram of the stationary wheel in the bent tube in Example 3.

[0034] In the diagram: 1. Machine tool; 11. Base plate; 12. Guide rail; 13. Support frame; 2. Placement table; 3. Shaping assembly; 31. Moving seat; 32. Correction component; 321. Arc groove; 33. Pneumatic push rod; 4. Bending assembly; 41. Lower support seat; 411. Groove one; 412. Limiting post; 42. Upper support seat; 421. Groove two; 43. Driving component; 431. Movable rod; 432. Connecting rod; 433. Driving wheel; 44. Bending stationary wheel; 441. Mold one; 4411. First hinge seat; 4412. Rotating shaft; 442. Mold two; 4421. Second hinge seat; 45. Placement cavity; 46. Movable cavity; 47. Driven wheel; 5. Fin; 51. Extension groove one; 52. Extension groove two; 53. Extension groove three. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0036] Example 1: To optimize the initial four-line product, a method was proposed as follows: Figure 9 The fin structure of the four-row product shown has several extension slots 51 of length a1 on the plane of the fin 5. These extension slots 51 are arranged in a matrix, with each vertical row forming a line. From left to right, they are the first, second, third, and fourth rows. As can be seen from the figure, the spacing between the second and third rows is significantly larger. The fin 5 also has an extension slot 52 of length a2. One end of the coil passes through the extension slots 51 of the first and second rows, then through the extension slot 52, and subsequently through the extension slots 51 of the third and fourth rows. If a one-piece molded coil is used, it requires significant manual intervention and is time-consuming, which is not conducive to mass production. If a separate bending and welding assembly method is used, the overall performance of the coil is reduced, shortening its service life and increasing the risk of corrosion and leakage at the weld joints. To meet the production needs of similar four-row products and address the issue of varying U-bend radii, a special tube-forming machine was designed, enabling the one-piece aluminum tube to meet the production requirements of four-row products. Its specific structure is as follows: Reference Figure 1 A pipe straightening machine includes a machine tool 1, a placement table 2, a pipe bending assembly 4, and a shaping assembly 3. The pipe bending assembly 4 and the shaping assembly 3 are fixedly mounted on the work platform of the machine tool 1. The shaping assembly 3 is located on one side of the pipe bending assembly 4. The placement table 2 is a gantry structure and is located on the other side of the pipe bending assembly 4. The crossbeam of the placement table 2 is located above the pipe bending assembly 4. in: Reference Figure 2 A base plate 11 is fixedly installed on the top of the machine tool 1. A support frame 13 and a guide rail 12 are fixedly installed on the base plate 11 along the long side. The bottom of the movable seat 31 is slidably engaged with the guide rail 12. The support frame 13 is used to install the pneumatic push rod 33. Reference Figures 1-3 and Figure 8The pipe bending assembly 4 includes a first mold 441 and a second mold 442. The first mold 441 and the second mold 442 are hinged to form a pipe bending stationary wheel 44, which is located in front of the crossbeam of the placement platform 2. The inner surface of the first mold 441 and the inner surface of the second mold 442 are flat, and the two flat surfaces form an angle. The first mold 441 and the second mold 442 can rotate relative to each other around the hinge point. In this embodiment, the first mold 441 and the second mold 442 are hinged by a cylindrical pin. The outer surface of the first mold 441 and the outer surface of the second mold 442 are both arc surfaces, and the arc surfaces together form a smooth arc surface. The maximum diameter of the arc surface is greater than the inner diameter of the part to be shaped and bent. The shaping component 3 includes a corrector 32, which can move horizontally. An arc-shaped groove 321 is provided on one side of the corrector 32. The arc-shaped groove 321 matches the outer wall of the coil bending part and is used to accurately position and limit the target position during the shaping process to prevent deformation and displacement. Therefore, when the bending stationary wheel 44 is closed, that is, when the inner side of mold one 441 is in contact with the inner side of mold two 442, the maximum diameter of the bending stationary wheel 44 is smaller than the bent part of the coil to be shaped. Thus, the bending stationary wheel 44 can quickly extend into the inner space of the bent part to be shaped from below without damaging the surface of the coil. When the bending stationary wheel 44 is opened, that is, when mold one 441 and mold two 442 rotate and open around the cylindrical pin, the arc surface formed therein applies uniform pressure to the inner side of the bent part of the coil in the radial direction, realizing local plastic expansion. At the same time, the correction piece 32 moves toward the bending stationary wheel 44, so that the bent part enters the arc-shaped groove, thereby accurately correcting the outer side of the bent part to be shaped. Through the joint squeezing action of the bending stationary wheel 44 and the correction piece 32, the U-bend of the bent part to be shaped becomes larger.

[0037] in: Reference Figure 1 , Figure 4 , Figure 6 Both mold 1 (441) and mold 2 (442) are columnar structures. The ends of mold 1 (441) and mold 2 (442) that are away from the base plate 11 are higher than the top surface of the placement platform 2. Both the arc surface of mold 1 (441) and the arc surface of mold 2 (442) are provided with annular grooves. After the annular grooves are joined together, they form an annular positioning groove to accommodate the bent part of the coil. One side of mold 1 (441) and one side of mold 2 (442) are tenon-and-mortise joints, and the tenon joints are hinged by a pin to achieve stable opening and closing movement. Thus, the tenon-and-mortise joint structure ensures that the molds are accurately aligned during the opening and closing process, avoids shaking or misalignment, improves the shaping stability, and at the same time ensures the continuity and fit of the arc surface, making the pressure distribution more uniform.

[0038] Reference Figure 4 , Figure 6The pipe bending assembly 4 also includes a drive component 43, which is an electrically controlled push rod. The output end of the drive component 43 is a movable rod 431. The end of the movable rod 431 away from the drive component 43 is hinged to two connecting rods 432. The bottom of the first mold 441 is provided with a first hinge seat 4411, and the bottom of the second mold 442 is provided with a second hinge seat 4421. The side of the first hinge seat 4411 is hinged to one connecting rod 432, and the side of the second hinge seat 4421 is hinged to another connecting rod 432. The drive component 43 drives the connecting rods 432 to push the first mold 441 and the second mold 442 to open and close synchronously through telescopic movement, so as to realize automatic adjustment of the included angle.

[0039] Reference Figure 4 , Figure 5 The pipe bending assembly 4 also includes a lower support 41, an upper support 42, a mounting cavity 45, and a movable cavity 46. The bottom of the lower support 41 is fixedly connected to the base plate 11, and the guide rail 12 is disposed between the lower support 41 and the support frame 13. The lower support 41 and the upper support 42 are symmetrically overlapped and fixedly mounted on one side of the driving member 43. One end of the mounting cavity 45 extends vertically through the lower support 41 and the upper support 42, and the movable cavity 46 is disposed between the lower support 41 and the upper support 42. Between the upper support 42 and the lower support 41, one end extends horizontally to the outside of the lower support 41 and the upper support 42, and the movable cavity 46 is connected to the mounting cavity 45; the bottom of the upper support 42 is provided with a groove 411, and one end extends toward the driving member 43 and passes through the upper support 42; the top of the lower support 41 is provided with a groove 421, and one end extends toward the driving member 43 and passes through the lower support 41; the groove 411 and the groove 421 are arranged opposite to each other, and together form a mounting cavity for accommodating the movable rod 431, and the mounting cavity is connected to the movable cavity 46.

[0040] Where: Reference Figure 3 The first hinge seat 4411 and the second hinge seat 4421 are located in the movable cavity 46, and the column of mold one 441 and the column of mold two 442 are located in the mounting cavity 45. The lower support seat 41 and the upper support seat 42 together form a stable load-bearing structure for the drive component 43 and the mold assembly. The mounting cavity 45 provides vertical limiting guidance for the mold, while the movable cavity 46 allows the hinge seats to move smoothly in the horizontal direction, ensuring smooth and synchronous opening and closing actions. The movable rod 431 can extend and retract smoothly in the mounting cavity, avoiding off-center load resistance, and at the same time forming an effective transmission linkage with the connecting rod 432. The symmetrical design of the first groove 411 and the second groove 421 ensures that the movable rod 431 moves in the center.

[0041] Reference Figure 5 , Figure 6A limiting post 412 is fixedly installed on the top of the lower support base 41. The limiting post 412 is located between the first hinge base 4411 and the second hinge base 4421. The limiting post 412 is vertically arranged, and one end away from the lower support base 41 passes through the movable cavity 46 and is fixedly connected to the bottom of the upper support base 42 to form a rigid support structure. Thus, the limiting post 412 effectively prevents the cavity size of the movable cavity 46 from changing due to the tightening of the screws, thereby ensuring that the movement of mold one 441 and mold two 442 will not be jammed.

[0042] Reference Figure 8 The shaping assembly 3 also includes a movable seat 31 and a pneumatic push rod 33. The end face of the straightening component 32 is detachably connected to the movable seat 31. The bottom of the movable seat 31 is slidably connected to the machine tool 1. The piston rod of the pneumatic push rod 33 is connected to the movable seat 31, driving the movable seat 31 to reciprocate along the sliding direction, thereby causing the straightening component 32 to approach or move away from the bent tube workpiece.

[0043] Its working process is as follows: Start the drive unit 43, control the movable rod 431 to move axially in the mounting cavity, and pull the first hinge seat 4411 and the second hinge seat 4421 through the connecting rod 432, drive the mold one 441 and the mold two 442 to converge inward in the movable cavity 46, realize the closure of the bending tube stationary wheel 44, at this time the diameter of the end face of the bending tube stationary wheel 44 is smaller than the bending radius to be processed; The workpiece to be processed is then placed flat on the top surface of the placement table 2, with the curved portion suspended in the air. Simultaneously, the top of the stationary bending wheel 44 is positioned within the curved portion, and the curved portion of the workpiece is engaged in the annular groove of the stationary bending wheel 44, ensuring accurate positioning. The drive unit 43 is activated again, causing the movable rod 431 to move in the opposite direction. This, via the connecting rod 432, pushes mold one 441 and mold two 442 to rotate and open around the cylindrical pin. The stationary bending wheel 44 gradually opens until its end face diameter equals the target bending radius. At this point, the workpiece is uniformly stressed to complete the expansion and shaping of the inner U-bend. Simultaneously, the pneumatic push rod 33 is activated, pushing the moving seat 31 forward along the slide rail, causing the straightening component 32 to contact the outer U-bend of the curved portion to be processed, thus expanding and shaping the U-bend. The straightening component 32 maintains a constant force under pneumatic control, avoiding over-straightening or under-straightening and ensuring consistency in batch processing. After the shaping process is completed, the pneumatic push rod 33 resets, the movable seat 31 returns to its initial position, the drive component 43 controls the movable rod 431 to retract, and the connecting rod 432 drives mold one 441 and mold two 442 to close synchronously. The stationary wheel 44 of the bent tube returns to its initial narrowed state, facilitating the removal of the finished product. The entire process is highly automated, with precise positioning, effectively improving production efficiency and product qualification rate.

[0044] It should be noted that in practical applications, multiple shaping components 3 can be provided according to different pipe diameters and bending angles. The correction component 32 and the bending stationary wheel 44 in each shaping component 3 are adapted to different processing requirements. In this way, the timing of the actions of each component is controlled by a program, so as to realize multi-station collaborative operation and meet the continuous processing requirements of complex pipe bending processes.

[0045] Example 2: To achieve automated processing, the placement stage 2 is optimized based on Example 1, as follows: The column of the placement platform 2 is a telescopic structure, and the top surface of the placement platform 2 is provided with a positioning groove with a contour setting. Thus, the workpiece to be processed is fixedly installed in the positioning groove. By adjusting the height of the column, the workpiece is moved down, and the mold 1 441 and mold 2 442 quickly extend into the curved section of the workpiece to be processed, realizing automatic and precise alignment and assembly. After the shaping is completed, the column extends, causing the workpiece to move up, realizing automatic unloading.

[0046] Example 3: The difference from Example 1 is that: The driving component 43 is a rotary motor, which is fixedly installed inside the machine tool 1. The output end passes through the machine tool 1 and the base plate 11, and a drive wheel 433 is fixedly installed at the end. The drive wheel 433 is rotatably connected to the base plate 11. A rotating shaft 4412 is fixedly installed at the bottom of the mold 441. The axis of the rotating shaft 4412 is on the same straight line as the hinge axis of the mold 441. A driven wheel 47 is fixedly installed at the end of the rotating shaft 4412 away from the mold 441. The driven wheel 47 is rotatably installed with the base plate 11 and meshes with the drive wheel 433. Thus, the driving component 43 drives the rotating shaft 4412 to rotate through the meshing transmission of the drive wheel 433 and the driven wheel 47, thereby driving the mold 441 to open and close around the hinge axis, realizing the retraction and opening of the bent tube stationary wheel 44.

[0047] Wherein: A support frame (not shown in the figure) is installed on the substrate 11. The support frame is used for stable support of mold 1 441 and mold 2 442 during rotation. The rotating shaft 4412 passes through the support frame and is rotatably connected to it. Since this structural design is a common design, and those skilled in the art can reasonably arrange the position and structure of the support frame according to functional requirements, the specific form of the support frame will not be described here, nor does it constitute a limitation on this solution.

[0048] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A bent pipe structure, characterized in that: It includes mold one (441) and mold two (442), both of which are columnar structures. Mold one (441) and mold two (442) are hinged to form a bent tube stationary wheel (44). The inner side of mold one (441) and the inner side of mold two (442) form an angle. The outer side of mold one (441) and the outer side of mold two (442) are both arc surfaces, and the arc surfaces together form a smooth arc surface. Wherein: Mold 1 (441) and Mold 2 (442) rotate relative to each other around the hinge.

2. The bent pipe structure as described in claim 1, characterized in that: Both the arc surface of mold one (441) and the arc surface of mold two (442) are provided with annular grooves, which are joined together to form annular positioning grooves; one side of mold one (441) and one side of mold two (442) are tenon-and-mortise joints, and the tenon joints are hinged by pins.

3. The bent pipe structure as described in claim 2, characterized in that: The bending structure also includes a driving component (43), which is connected to mold one (441) and / or mold two (442) through a transmission mechanism, so that mold one (441) and / or mold two (442) rotate around the hinge.

4. A pipe straightening machine, comprising the pipe bending structure as described in claim 3, characterized in that: It also includes a machine tool (1) and a shaping component (3), the bending structure is a bending component (4), the bending component (4) and the shaping component (3) are set on the working platform of the machine tool (1), and the shaping component (3) is set on one side of the bending component (4); in: The machine tool (1) is used to support and fix the components; The maximum diameter of the stationary wheel (44) is greater than the inner diameter of the bent section to be shaped; The shaping component (3) includes a straightening member (32), which is movable in the horizontal direction. An arc-shaped groove (321) is provided on one side of the straightening member (32), which matches the outer wall of the coil bending section.

5. The pipe straightening machine as described in claim 4, characterized in that: The driving component (43) is an electrically controlled push rod, and the output end of the driving component (43) is a movable rod (431). Two connecting rods (432) are hinged to the end of the movable rod (431) away from the driving component (43). The bottom of the first mold (441) is provided with a first hinge seat (4411), and the bottom of the second mold (442) is provided with a second hinge seat (4421). Wherein: the side of the first hinge seat (4411) is hinged to a connecting rod (432), and the side of the second hinge seat (4421) is hinged to another connecting rod (432).

6. The pipe straightening machine as described in claim 5, characterized in that: The pipe bending assembly (4) also includes a lower support (41), an upper support (42), a mounting cavity (45), and a movable cavity (46). The lower support (41) and the upper support (42) are symmetrically overlapped and fixedly installed on one side of the drive member (43). One end of the placement cavity (45) extends vertically through the lower support seat (41) and the upper support seat (42). The movable cavity (46) is located between the lower support seat (41) and the upper support seat (42), and one end extends horizontally to the outside of the lower support seat (41) and the upper support seat (42). The movable cavity (46) is connected to the placement cavity (45). The first hinge seat (4411) and the second hinge seat (4421) are located in the movable cavity (46). The column of the first mold (441) and the column of the second mold (442) are located in the placement cavity (45).

7. The pipe straightening machine as described in claim 6, characterized in that: The bottom of the upper support (42) is provided with a groove (411), and one end extends toward the driving member (43) and passes through the upper support (42); the top of the lower support (41) is provided with a groove (421), and one end extends toward the driving member (43) and passes through the lower support (41); the groove (411) and the groove (421) are arranged opposite to each other and together form an installation cavity for accommodating the movable rod (431), and the installation cavity is connected to the movable cavity (46); A limiting post (412) is fixedly installed on the top of the lower support (41). The limiting post (412) is located between the first hinge seat (4411) and the second hinge seat (4421). The limiting post (412) is vertically arranged, and one end away from the lower support (41) passes through the movable cavity (46) and is fixedly connected to the bottom of the upper support (42).

8. The pipe straightening machine as described in claim 7, characterized in that: The shaping component (3) also includes a movable seat (31) and a pneumatic push rod (33). The end face of the corrector (32) is detachably connected to the movable seat (31). The bottom of the movable seat (31) is slidably connected to the machine tool (1). The piston rod of the pneumatic push rod (33) is fixedly connected to the movable seat (31).

9. The pipe straightening machine as described in claim 8, characterized in that: A base plate (11) is fixedly installed on the top of the machine tool (1). A support frame (13) and a guide rail (12) are fixedly installed on the base plate (11) along the long side. The bottom of the movable seat (31) is slidably engaged with the guide rail (12). The support frame (13) is used to install the pneumatic push rod (33). The bottom of the lower support seat (41) is fixedly connected to the base plate (11). The guide rail (12) is arranged between the lower support seat (41) and the support frame (13). The top of the machine tool (1) is also fixedly installed with a placement platform (2) for carrying the bent pipe workpiece to be processed. The placement platform (2) has a gantry structure and spans across the drive unit (43). The ends of the mold one (441) and mold two (442) that are away from the base plate (11) are higher than the top surface of the placement platform (2).

10. The pipe straightening machine as described in claim 9, characterized in that: The column of the placement platform (2) is a telescopic structure; the top surface of the placement platform (2) is provided with a positioning groove for placing the coil.

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