Thin-wall pipe fitting bending device and pipe bending machine

Abstract

The utility model discloses a thin-wall pipe fitting bending device and a pipe bending machine. The thin-wall pipe fitting bending device comprises a base, a mold clamping piece, a mold profiling piece, a flexible module, a connector and a round mold piece, the flexible module is formed by distributing a plurality of flexible plates side by side, the mold clamping piece, the flexible module and the mold profiling piece are sequentially connected to the connector in series from front to back, and the mold profiling piece and the flexible module are slidably connected to the base; specific profiling curved surface grooves are formed in the mold clamping piece, the flexible plate and the mold profiling piece and used for containing pipe fittings, arc-shaped rails corresponding to the specific profiling curved surface grooves are arranged on the outer side of the round mold piece, and the mold clamping piece and part of the flexible mold piece are connected to the arc-shaped rails to form a bending channel of the pipe fittings. In the bending process of the pipe fitting, the flexible module can correspondingly adjust the shape of the pipe fitting, it is ensured that pipe fitting materials can flow evenly during bending, the wall thickness of the pipe fitting is even, the surface of the pipe fitting is smooth and clean, the bending flattening rate of the pipe fitting can be increased to be close to 1, and the forming machining quality of the pipe fitting is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thin-walled pipe bending, in particular to a thin-walled pipe bending device and a pipe bending machine. Background Art

[0002] With the advancement of refrigeration technology, more new refrigerants are being used in air conditioning systems, such as R134a, R410a, R32, and R600. The maximum operating pressure of air conditioner refrigerant systems also needs to be increased, increasing by approximately 20% compared to R22 refrigerant systems. This means that the pressure-bearing capacity of air conditioner internal parts and components must also be improved. During the verification of the air conditioner product development process and after-sales research and analysis, it was discovered that the bends of copper pipes in air conditioning systems are prone to cracking and leaking. Furthermore, there are many causes of pipe failure. Through in-factory experimental analysis and follow-up analysis of simulated air conditioner after-sales operation, it was found that the quality of local processing and molding of pipes is a major cause of pipe failure.

[0003] After pipe fittings are machined and formed, they will experience a certain degree of out-of-roundness at the bend. The industry typically uses the flattening ratio, calculated by dividing the maximum pipe diameter by the minimum pipe diameter. A flattening ratio closer to 1 is preferable; otherwise, it indicates inconsistent material flow in the bend, impairing the reliability and quality of the finished part. In air conditioning systems, pipe fittings are constantly elastically deformed due to factors such as component movement, refrigerant and pulses, and component resonance. After a period of operation, fatigue damage can occur in weaker areas (pipe fittings in air conditioning systems typically experience deformation shocks of 50-8000 times per minute).

[0004] Existing pipe manufacturing processes typically involve feeding pipe coils to automatic pipe bending machines to form components. However, the bending process in existing pipe manufacturing suffers from poor reliability and inability to guarantee quality. Therefore, a thin-walled pipe bending device is needed to address this issue. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a thin-walled pipe bending device and a pipe bending machine.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] In the first aspect, an embodiment of the utility model provides a thin-walled pipe bending device, comprising: a base, a clamping mold, a backing mold, a flexible module, a connector and a circular mold, wherein the flexible module is composed of several flexible plates of the same structure distributed side by side, and the side surfaces of adjacent flexible plates are in contact with each other, the clamping mold, the flexible module and the backing mold are sequentially connected in series with the connector from front to back, the backing mold and the flexible module are slidably connected to the base, the clamping mold, the flexible plate and the backing mold are all provided with specific contoured curved grooves for placing pipes, and an arc track corresponding to the specific contoured curved groove is provided on the outside of the circular mold, the clamping mold and part of the flexible module are connected to the arc track to form a bending channel for the pipe.

[0008] In a specific embodiment, a sliding groove is provided on a side of the base facing the back mold member, and the back mold member and the flexible module are slidably connected to the sliding groove.

[0009] In a specific embodiment, the number of the connectors is three, and they are respectively located above, below, and in the middle area of ​​the specific contoured curved groove, so that the three connectors are distributed in a triangular shape.

[0010] In a specific embodiment, the diameter of the specific contoured curved groove differs from the outer diameter of the tube by -0.5-0.5 mm.

[0011] In a specific embodiment, the upper surfaces of the flexible module and the clamping module are in the same horizontal plane.

[0012] In a specific embodiment, the thickness of the flexible board is 2-5 mm.

[0013] The thin-walled pipe bending device of the present invention has the following beneficial effects compared with the prior art: by arranging a flexible module composed of several flexible plates of the same structure arranged side by side, and the side surfaces of adjacent flexible plates contact each other, a contoured structure that can adapt to the shape of the pipe can be formed; as the shape of the pipe changes during the bending process, the flexible module can also adjust its shape accordingly, ensuring that the pipe material can flow evenly during bending, so that the wall thickness of the pipe is uniform and the surface is smooth; and the bending flattening rate of the pipe can be increased to close to 1, thereby improving the forming and processing quality of the pipe.

[0014] In the second aspect, an embodiment of the present invention provides a pipe bending machine, comprising the thin-walled pipe bending device, a machine tool body, a fastening module and a clamping module as described above, wherein the circular mold is rotatably connected to the machine tool body, the base is connected to the fastening module, and the clamping mold is connected to the clamping module so that the clamping mold is pressed against the circular mold. The operation of the machine tool body drives the circular mold and the clamping mold to move synchronously so that the pipe is bent.

[0015] In a specific embodiment, the base is provided with a first positioning groove and a first connecting hole, and the fastening module is connected to the first positioning groove and the first connecting hole.

[0016] In a specific embodiment, the clamping module is provided with a second positioning groove and a second connecting hole, and the clamping module is connected to the second positioning groove and the second connecting hole.

[0017] In a specific embodiment, the circular mold is provided with a mounting hole, and the circular mold is fixed to the machine tool body through the mounting hole, so that the operation of the machine tool body drives the circular mold to rotate.

[0018] The pipe bending machine of the present invention has the following beneficial effects compared with the prior art: by arranging a flexible module composed of several flexible plates with the same structure arranged side by side, the sides of adjacent flexible plates contact each other, thus forming a contoured structure that can adapt to the shape of the pipe fitting; as the main body of the machine tool works, the circular module and the clamping module are driven to move synchronously to bend the pipe fitting; as the shape of the pipe fitting changes during the bending process, the flexible module can also adjust its shape accordingly to ensure that the pipe fitting material can flow evenly during bending, so that the wall thickness of the pipe fitting is uniform and the surface is smooth; the bending flattening rate of the pipe fitting can also be increased to close to 1, so as to improve the forming processing quality of the pipe fitting.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is a schematic structural diagram of the thin-walled pipe bending device provided by the utility model;

[0022] Figure 2 A schematic diagram of a portion of the structure of the thin-walled pipe bending device provided by the utility model;

[0023] Figure 3 A schematic structural diagram of the pipe bending machine provided by the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the pipe bender provided by the utility model when bending a pipe at 45 degrees;

[0025] Figure 5 This is a schematic diagram of the structure of the pipe bender provided by the utility model when bending a pipe fitting 90 degrees.

[0026] Reference numerals:

[0027] Base 10, first positioning groove 11, first connecting hole 12, clamping module 20, specific contoured curved groove 21, second positioning groove 22, second connecting hole 23, backing module 30, flexible module 40, connector 50, circular module 60, arc track 61, mounting hole 62, machine tool body 70, fastening module 80, clamping module 90. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0035] See also Figures 1 to 2According to the specific embodiment shown, the utility model discloses a thin-walled pipe bending device, comprising: a base 10, a clamping mold 20, a backing mold 30, a flexible module 40, a connector 50 and a circular mold 60, wherein the flexible module 40 is composed of several flexible plates with the same structure distributed side by side, and the side surfaces of adjacent flexible plates are in contact with each other, the clamping mold 20, the flexible module 40 and the backing mold 30 are sequentially connected to the connector 50 from front to back, the backing mold 30 and the flexible module 40 are slidably connected to the base 10, the clamping mold 20, the flexible plate and the backing mold 30 are all provided with a specific contoured curved groove 21 for placing pipes, and an arc track 61 corresponding to the specific contoured curved groove 21 is provided on the outer side of the circular mold 60, the clamping mold 20 and part of the flexible module 40 are connected to the arc track 61 to form a bending channel for the pipe.

[0036] Specifically, by configuring the flexible module 40 to be composed of several flexible plates of the same structure arranged side by side, with the sides of adjacent flexible plates in contact with each other, a contoured structure that can adapt to the shape of the pipe can be formed. As the shape of the pipe changes during the bending process, the flexible module 40 can also adjust its shape accordingly, ensuring that the pipe material can flow evenly during bending, resulting in a uniform wall thickness and a smooth surface. The flattening ratio of the pipe can also be increased to close to 1, thereby improving the quality of the pipe forming process. In addition, by providing specific contoured curved grooves 21 (e.g., semicircular notches) on the clamping module 20, the flexible module 40, and the supporting module 30, and cooperating with the arc-shaped track 61 corresponding to the specific contoured curved grooves 21, the pipe can be precisely positioned and clamped. This design ensures the stability and accuracy of the pipe during the bending process and avoids bending quality problems caused by pipe position offset. In addition, during the pipe bending process, the flexible module 40 can imitate the shape of the pipe in real time, thereby ensuring that the pipe material can flow evenly during bending. This design helps to avoid problems such as uneven wall thickness, cracks or breakage during the bending process of the pipe, thereby improving the forming quality and strength of the pipe. In addition, since the flexible module 40 is composed of several flexible plates with the same structure, it can adapt to pipes of different diameters by adjusting the number, arrangement, and size of the flexible plates. This design makes the device more versatile and flexible, and can meet the needs of bending a variety of pipes. In addition, by adjusting the position of the clamping module 20, the flexible module 40 and the supporting module 30 on the connector 50, and utilizing the arc-shaped track 61 on the outside of the circular module 60, the bending angle of the pipe can be precisely controlled. This design enables the device to achieve precise control of the bending angle of the pipe, meeting the requirements of different application scenarios for the shape and size of the pipe.

[0037] In one embodiment, a sliding groove (not shown) is provided on a side of the base 10 facing the back mold member 30 , and the back mold member 30 and the flexible module 40 are slidably connected to the sliding groove.

[0038] Specifically, during the tube bending process, the clamping member 20, flexible module 40, support member 30, and connector 50 form a unit that slides relative to the base 10. The design of the chute allows the support member 30 and flexible module 40 to slide along the chute during the tube bending process. This sliding motion not only increases the flexibility of the device during the bending process but also allows the tube to be bent more smoothly. Furthermore, the chute provides a stable motion trajectory for the support member 30 and flexible module 40. During the tube bending process, the support member 30 and flexible module 40 slide along the chute, ensuring that they always maintain the correct position and angle, thereby ensuring accurate tube bending. Furthermore, by guiding the movement of the support member 30 and flexible module 40 through the chute, the stress distribution in the tube during the bending process can be more effectively controlled, which helps reduce internal stress and deformation generated during the bending process, thereby improving the tube's forming quality and strength. In addition, the design of the slide simplifies the operating steps in the pipe bending process. The operator only needs to place the pipe between the clamping module 20, the flexible module 40 and the supporting module 30, and then start the circular module 60 to drive the supporting module 30 and the flexible module 40 to slide automatically along the slide to complete the bending process of the pipe. This automated operation not only improves processing efficiency, but also reduces operation difficulty and labor intensity.

[0039] In one embodiment, there are three connectors 50 , which are respectively located above and below the specific contoured curved groove 21 and in the middle area of ​​the clamping mold 20 , so that the three connectors 50 are distributed in a triangular shape.

[0040] Specifically, the three connectors 50 are distributed in a triangular shape, which can more effectively support and fix the flexible module 40. During the pipe bending process, the flexible module 40 will be subjected to pressure and bending force from the pipe. The uniform distribution of the three connectors 50 can ensure that the flexible module 40 can maintain balance when subjected to force, avoiding the situation where local excessive force occurs, thereby extending the service life of the flexible module 40. In addition, the triangle is a geometric shape with high stability. In the thin-walled pipe bending device, the three connectors 50 are distributed in a triangular shape to form a stable support structure. This structure not only helps prevent the flexible module 40 from shifting or deforming during the bending process, but also improves the stability and reliability of the entire device. In addition, because the three connectors 50 can ensure that the flexible module 40 is subjected to uniform force and has a stable structure, the pipe can complete the bending action more smoothly during the pipe bending process, and the bending angle and shape can be consistent, which helps to improve the accuracy and consistency of the pipe bending process, thereby meeting higher quality requirements. Furthermore, the design of the three connectors 50 makes the device structure more concise and clear, making it easier for operators to operate and maintain. For example, when replacing the flexible module 40 or adjusting the bending angle, operators can more easily remove and install related components, thereby improving work efficiency and reducing maintenance costs.

[0041] In one embodiment, the diameter of the specific contoured curved groove 21 differs from the outer diameter of the pipe by -0.5-0.5 mm.

[0042] Specifically, the closed curved surface formed by the clamping module 20 and the circular module 60 has a specific contoured groove 21 in the clamping module 20 with a diameter smaller than the diameter of the pipe. This allows for clamping the pipe, ensuring that it does not shift during bending and thus preventing any impact on the pipe's bending accuracy. Meanwhile, the diameters of the contoured grooves 21 in the support module 30 and the flexible module 40, along with the closed curved surface formed by the circular module 60, are larger than the outer diameter of the pipe. This serves to form a contoured channel for the pipe during bending, enhancing the flexibility of the flexible module 40 during the bending process, allowing the pipe to bend more smoothly and improving its quality.

[0043] In one embodiment, the upper surfaces of the flexible module 40 and the clamping module 20 are on the same horizontal plane.

[0044] Specifically, when the upper surfaces of the flexible module 40 and the clamping module 20 are on the same horizontal plane, the pipe can be subjected to uniform pressure and bending force during the bending process, which helps to reduce the internal stress and deformation generated in the pipe during the bending process, thereby improving the forming quality and strength of the pipe. In addition, because the upper surfaces of the flexible module 40 and the clamping module 20 are on the same horizontal plane, the pipe can more easily maintain the correct position and angle when placing and bending, which helps to reduce errors in the bending process and improve the bending accuracy and consistency of the pipe. In addition, when the upper surfaces of the flexible module 40 and the clamping module 20 are on the same horizontal plane, the operator can more conveniently place the pipe in the device and perform subsequent bending operations. This design reduces operational difficulty and labor intensity and improves work efficiency. In addition, the design of the flexible module 40 and the clamping module 20 on the same horizontal plane allows the entire device to maintain a more stable structure during the bending process, which helps to reduce shaking and deformation of the device during the bending process, thereby improving the reliability and service life of the device.

[0045] In one embodiment, the thickness of the flexible board is 2-5 mm.

[0046] Specifically, the flexible sheet needs to have a certain strength and rigidity to support the tube and transmit the bending force during the bending process. A flexible sheet with a thickness of 2-5 mm can provide sufficient strength and rigidity to ensure that the tube does not deform or damage during the bending process due to the flexible sheet being too soft. At the same time, the flexible sheet also needs to have a certain degree of flexibility to adapt to the bending deformation of the tube during the bending process. A flexible sheet with a thickness of 2-5 mm maintains sufficient strength and rigidity while also maintaining sufficient flexibility to deform with the bending of the tube, thereby achieving efficient bending of the tube. In addition, the appropriate thickness of the flexible sheet helps optimize the bending effect. A flexible sheet that is too thick may lead to uneven transmission of bending force and affect bending accuracy, while a flexible sheet that is too thin may be damaged due to insufficient strength. A flexible sheet with a thickness of 2-5 mm can provide a stable bending effect while ensuring bending accuracy. Furthermore, the appropriate thickness can extend the service life of the flexible sheet. During repeated bending, the flexible sheet is subjected to significant stress and wear. A flexible sheet with a thickness of 2-5 mm has sufficient thickness and strength to withstand these stresses and wear, thereby extending its service life. In addition, since the outer diameter and bending requirements of the pipe fittings may be different, the thickness of the flexible plate also needs to be adjusted accordingly. The flexible plate with a thickness of 2-5mm provides a wider thickness range, which can be selected and adjusted according to different pipe fittings and bending requirements to meet various processing needs.

[0047] See also Figures 1 to 5In the specific embodiment shown, the utility model also discloses a pipe bending machine, including the thin-walled pipe bending device as described above, a machine tool body 70, a fastening module 80 and a clamping module 90, the circular mold 60 is rotatably connected to the machine tool body 70, the base 10 is connected to the fastening module 80, and the clamping mold 20 is connected to the clamping module 90, so that the clamping mold 20 is pressed against the circular mold 60, and the operation of the machine tool body 70 drives the circular mold 60 and the clamping mold 20 to move synchronously to bend the pipe.

[0048] Specifically, by setting up a flexible module 40 composed of several flexible plates of the same structure arranged side by side, the sides of adjacent flexible plates contact each other, so that a contoured structure that can adapt to the shape of the pipe can be formed. As the machine tool body 70 works, the circular module 60 and the clamping module 20 are driven to move synchronously to bend the pipe. The shape of the pipe changes during the bending process, and the flexible module 40 can also adjust its shape accordingly to ensure that the pipe material can flow evenly during bending, so that the wall thickness of the pipe is uniform and the surface is smooth. The bending rate of the pipe can also be increased to close to 1 to improve the quality of the pipe forming process. In addition, when the machine tool main body 70 is working, the circular mold 60 and the clamping mold 20 move synchronously under the action of the driving force. The circular mold 60 serves as a mold for bending the pipe fittings, and its rotation trajectory determines the bending shape and angle of the pipe fittings. Under the joint action of the circular mold 60 and the clamping mold 20, the thin-walled pipe fittings are gradually bent to the required shape. The clamping effect of the clamping mold 20 ensures that the pipe fittings will not be deformed or damaged due to uneven force during the bending process.

[0049] In one embodiment, the base 10 is provided with a first positioning groove 11 and a first connecting hole 12 , and the fastening module 80 is connected to the first positioning groove 11 and the first connecting hole 12 .

[0050] Specifically, by cooperating with the fastening module 80, the first positioning groove 11, and the first connecting hole 12, it is possible to ensure that the base 10 maintains a stable position during the pipe bending process without shifting or shaking. This stability is crucial for ensuring bending accuracy and processing quality. In addition, the design of the first positioning groove 11 and the first connecting hole 12 allows the fastening module 80 to be connected to the base 10 in a precise manner. This precise positioning helps to ensure that the pipe is in the correct position during the bending process, thereby improving processing accuracy. In addition, since the connection between the base 10 and the fastening module 80 is stable, the error caused by the movement or shaking of the base 10 can be reduced, which helps to ensure that the size and shape of the pipe after bending meet the design requirements. In addition, during the pipe bending process, the base 10 needs to withstand the pressure from the pipe. By cooperating with the fastening module 80, the first positioning groove 11, and the first connecting hole 12, these pressures can be more evenly distributed on the base 10, thereby enhancing the structural strength.

[0051] In one embodiment, the clamping module 20 is provided with a second positioning groove 22 and a second connecting hole 23 , and the clamping module 90 is connected to the second positioning groove 22 and the second connecting hole 23 .

[0052] Specifically, through the cooperation between the clamping module 90 and the second positioning groove 22 and the second connecting hole 23, it is ensured that the clamping module 20 maintains a stable position during the bending process of the pipe fitting, and there will be no displacement or shaking. This stability is crucial to ensuring bending accuracy and processing quality, because any slight movement of the clamping module 20 may affect the final shape and size of the pipe fitting. In addition, the design of the second positioning groove 22 and the second connecting hole 23 allows the clamping module 90 to be connected to the clamping module 20 in a precise manner. This precise positioning helps to ensure that the pipe fitting is accurately clamped and positioned during the bending process, thereby improving processing accuracy. In addition, because the connection between the clamping module 20 and the clamping module 90 is stable, the error caused by the movement or shaking of the clamping module 20 can be reduced, which helps to ensure that the size and shape of the pipe fitting after bending meet the design requirements and improve the product qualification rate and consistency. In addition, during the bending process of the pipe, the clamping module 20 needs to withstand the pressure from the pipe. Through the cooperation of the clamping module 90 with the second positioning groove 22 and the second connecting hole 23, these pressures can be more evenly distributed on the clamping module 20, thereby enhancing the structural strength.

[0053] In one embodiment, the circular mold 60 is provided with a mounting hole 62 , and the circular mold 60 is fixed to the machine tool body 70 through the mounting hole 62 , so that the operation of the machine tool body 70 drives the circular mold 60 to rotate.

[0054] Specifically, the circular die 60 can be stably fixed to the machine tool body 70 through the mounting holes 62. This fixed connection ensures that the circular die 60 can maintain stable rotation when the machine tool body 70 is in operation, without shaking or deflecting. In addition, the machine tool body 70 is connected to the circular die 60 through the mounting holes 62, which can effectively transmit power to the circular die 60, causing it to rotate at a predetermined speed and direction. This power transmission is the foundation of the pipe bending machine's ability to bend pipe fittings. In addition, the design of the mounting holes 62 allows the circular die 60 to be fixed to the machine tool body 70 in a precise manner. This precise positioning helps ensure that the pipe fittings are accurately placed on the circular die 60 during the bending process, thereby improving processing accuracy. In addition, because the connection between the circular die 60 and the machine tool body 70 is stable, errors caused by unstable connection can be reduced, which helps ensure that the size and shape of the bent pipe fittings meet design requirements. In addition, during the bending process of the pipe, the circular mold 60 needs to withstand the pressure and friction from the pipe. By connecting it to the machine tool body 70 through the mounting hole 62, these pressures can be more evenly distributed on the circular mold 60 and the machine tool body 70, thereby enhancing the structural strength.

[0055] Specifically, the fastening module 80 and the clamping module 90 are both composed of a cylinder and a fixed arm, wherein the cylinder of the fastening module 80 is fixedly connected to the machine tool body 70, and the cylinder of the clamping module 90 is slidably connected to the machine tool body 70, one end of the fixed arm is transmission-connected to the telescopic end of the cylinder, and the other end is connected to the base 10 or the clamping module 20 (i.e., the first positioning groove 11, the first connecting hole 12 or the second positioning groove 22, the second connecting hole 23). Before performing the pipe bending operation, the pipe is first placed in a specific contoured curved groove 21, the clamping die 20 is pressed against the circular die 60 to clamp the pipe, and part of the flexible module 40 is connected to the arc track 61 to form a contoured channel for the pipe. When the machine tool body 70 is working, the clamping die 20, the circular die 60 and the pipe synchronously move in a circular motion around the axis of the circular die 60, the base 10 remains in position, and the flexible module 40 moves closely against the arc track 61 of the circular die 60 to perform contouring motion. After the pipe is bent, the two cylinders simultaneously drive the clamping die 20 and the base 10 to move toward the side away from the circular die 60 to separate from the circular die 60. At this time, the bent pipe can be taken out. For the specific processing process of pipe bending, please refer to Figure 4 The bend shown is 45 degrees and Figure 5 Schematic diagram of bending a pipe 90 degrees.

[0056] Specifically, the machine tool body 70 adopts existing public technology, which will not be elaborated here.

[0057] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A thin-walled pipe bending device, characterized in that: include: A base, a clamping mold, a backing mold, a flexible module, a connector and a circular mold. The flexible module is composed of several flexible plates with the same structure distributed side by side, and the side surfaces of adjacent flexible plates are in contact with each other. The clamping mold, the flexible module and the backing mold are sequentially connected to the connector from front to back. The backing mold and the flexible module are slidably connected to the base. The clamping mold, the flexible plate and the backing mold are all provided with specific contoured curved grooves for placing pipes. An arc track corresponding to the specific contoured curved groove is provided on the outside of the circular mold. The clamping mold and part of the flexible module are connected to the arc track to form a bending channel for the pipe.

2. The thin-walled pipe bending device according to claim 1, characterized in that: A sliding groove is provided on one side of the base facing the supporting mold member, and the supporting mold member and the flexible module are slidably connected to the sliding groove.

3. The thin-walled pipe bending device according to claim 1, characterized in that: The number of the connectors is three, and they are respectively located above and below the specific contoured curved groove and in the middle area of ​​the clamping module, so that the three connectors are distributed in a triangular shape.

4. The thin-walled pipe bending device according to claim 1, characterized in that: The diameter of the specific contoured curved groove differs from the outer diameter of the pipe by -0.5-0.5 mm.

5. The thin-walled pipe bending device according to claim 1, characterized in that: The upper surfaces of the flexible module and the clamping module are in the same horizontal plane.

6. The thin-walled pipe bending device according to claim 1, characterized in that: The thickness of the flexible board is 2-5 mm.

7. A pipe bending machine, characterized in that: It comprises a thin-walled pipe bending device as described in any one of claims 1 to 6, a machine tool body, a fastening module and a clamping module, the circular mold is rotatably connected to the machine tool body, the base is connected to the fastening module, and the clamping mold is connected to the clamping module so that the clamping mold is pressed against the circular mold. When the machine tool body works, the circular mold and the clamping mold are driven to move synchronously to bend the pipe.

8. The pipe bending machine according to claim 7, characterized in that The base is provided with a first positioning groove and a first connecting hole, and the fastening module is connected to the first positioning groove and the first connecting hole.

9. The pipe bending machine according to claim 7, characterized in that The clamping module is provided with a second positioning groove and a second connecting hole, and the clamping module is connected to the second positioning groove and the second connecting hole.

10. The pipe bending machine according to claim 7, characterized in that The circular mold is provided with a mounting hole, and the circular mold is fixed to the machine tool body through the mounting hole, so that the operation of the machine tool body drives the circular mold to rotate.

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