Continuous turning machining device for bent pipe

Abstract

The invention relates to the technical field of bent pipe machining equipment, and provides a bent pipe continuous turning machining device which is used for machining a straight pipe section into a bent pipe and comprises a pipe bending assembly and a first supporting and bending assembly, and the first supporting and bending assembly comprises a first main body and a second main body, the first supporting piece is arranged on the first main body in a sliding mode in the radial direction of the straight pipe section and is configured to be capable of being close to or away from the inner wall of the straight pipe section after sliding; one end of the extension rod is connected with the first main body, the other end of the extension rod extends out of the straight pipe section in the axial direction of the straight pipe section, and the extension rod is provided with a penetrating channel; the operating rod is rotationally arranged in the penetrating channel, one end of the operating rod extends out of the penetrating channel, and the other end of the operating rod is configured to drive the first supporting piece to move to be close to the inner wall of the straight pipe section after rotating. By means of the technical scheme, the technical problem that in the prior art, when pipe bending equipment conducts pipe bending machining, stripes, wrinkles and bending are prone to occurring on products is solved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of bent pipe processing equipment, and specifically, to a bent pipe continuous variable direction processing device. Background Art

[0002] The continuous variable direction processing of a pipe bender is a relatively complex processing technology in the field of pipe processing. The processing principle is to control the various moving axes of the pipe bender, including the bending axis, the rotating axis, and the feeding axis, etc., to achieve the bent pipe processing. During the processing, according to the pre-set program, the pipe is gradually fed into the pipe bender, and at the same time, the bending die of the pipe bender bends the pipe at a specific angle and radius. The rotating axis drives the pipe to continuously adjust the angle during the bending process, so as to achieve the continuous variable direction bending of the pipe. In the prior art, during the bent pipe processing, more or less, there will always be a situation where the bent pipe fails, such as causing defects such as stripe wrinkles at the bent part of the bent pipe, or even bending, etc., resulting in unstable quality of the bent pipe. Summary of the Invention

[0003] To overcome the above defects, embodiments of the present invention provide a bent pipe continuous variable direction processing device, which solves the technical problem that stripes, wrinkles, and bending are likely to occur in the products during the bent pipe processing by the existing bent pipe equipment.

[0004] According to one aspect, at least one embodiment of the present invention provides a bent pipe continuous variable direction processing device for processing a straight pipe section into a bent pipe, including a bent pipe assembly and a first supporting and bending assembly. The bent pipe assembly and the first supporting and bending assembly are respectively located outside and inside the pipe of the straight pipe section. The first supporting and bending assembly includes: A first main body for placing inside the pipe of the straight pipe section; A first supporting member slidably arranged on the first main body along the radial direction of the straight pipe section and configured to be able to approach or move away from the inner wall of the straight pipe section after sliding; An extension rod, one end of which is connected to the first main body, and the other end extends axially along the straight pipe section to the outside of the pipe of the straight pipe section. The extension rod has a through channel; An operating rod rotatably arranged in the through channel, one end extending out of the through channel, and the other end configured to drive the first supporting member to slide close to the inner wall of the straight pipe section after rotation.

[0005] For example, in a bent pipe continuous variable direction processing device provided by at least one embodiment of the present invention, the operating rod has a first threaded section, and the first supporting and bending assembly further includes: The first pushing member is slidably disposed on the first body, and the sliding direction is along the axial direction of the straight pipe section. The first pushing member has a first threaded hole, and the first threaded hole is threadedly connected to the first threaded section. The first pushing member is configured to push the first supporting member to move after sliding.

[0006] For example, in a bent pipe continuous variable direction processing device provided by at least one embodiment of the present invention, one side of the first pushing member close to the first supporting member has a first pushing conical surface, and one side of the first supporting member close to the first pushing member has a first pushed conical surface, and the first pushing conical surface abuts against the first pushed conical surface.

[0007] For example, in a bent pipe continuous variable direction processing device provided by at least one embodiment of the present invention, there are at least two first supporting members arranged circumferentially around the axial direction of the straight pipe section.

[0008] For example, in a bent pipe continuous variable direction processing device provided by at least one embodiment of the present invention, on the side of the first supporting member for approaching the inner wall of the straight pipe section, there are a plurality of cylindrical supporting portions, and the plurality of cylindrical supporting portions are sequentially hinged, and the hinge axis is perpendicular to the axial direction of the straight pipe section so as to continuously change the direction when the straight pipe section is processed into a bent pipe.

[0009] For example, a bent pipe continuous variable direction processing device provided by at least one embodiment of the present invention further includes a second supporting and bending assembly, and the second supporting and bending assembly includes: A second body, which is hinged to the first body, and the hinge axis is perpendicular to and coplanar with the pipe axis of the straight pipe section; A second supporting member, which is slidably disposed on the second body along the radial direction of the straight pipe section, and is configured to be able to approach or move away from the inner wall of the straight pipe section after sliding.

[0010] For example, in a bent pipe continuous variable direction processing device provided by at least one embodiment of the present invention, the second supporting and bending assembly further includes: A transmission rod, which is rotatably disposed on the second body and is in transmission connection with the operating rod for being driven to rotate by the operating rod. The transmission rod has a second threaded section; A second pushing member, which is slidably disposed on the second body, and the sliding direction is along the axial direction of the straight pipe section. The second pushing member has a second threaded hole, and the second threaded hole is threadedly connected to the second threaded section. The second pushing member is configured to push the second supporting member to move after moving.

[0011] For example, a bending pipe continuous variable direction processing device provided by at least one embodiment of the present invention, the transmission rod is universally connected to the operating rod in a universal manner; the second bending support assembly is arranged in sequence, and the second main bodies of two adjacent second bending support assemblies are hinged to each other, and the transmission rods of two adjacent second bending support assemblies are universally connected to each other.

[0012] For example, a bending pipe continuous variable direction processing device provided by at least one embodiment of the present invention, the bending pipe assembly includes: A frame; A bending fixed die, which is arranged on the frame and has a bending groove; A moving member, which is movably arranged on the frame and is configured to move closer to or away from the bending fixed die after moving; A pushing die, which is rotatably arranged on the moving member, and the bending fixed die and the pushing die are used to bend the straight pipe section, and the first bending support assembly is located between the bending fixed die and the pushing die.

[0013] For example, a bending pipe continuous variable direction processing device provided by at least one embodiment of the present invention, there are two pushing dies, which are respectively located on both sides of the bending fixed die, and further include: A linear driving member, which is used to push the moving member to move.

[0014] The beneficial effects of the embodiments of the present invention are as follows: In the present invention, by providing uniform support inside the straight pipe section through the first bending support assembly, the appearance of defects such as stripe wrinkles and bends during the bending process of the pipe is reduced, and the quality of the bent pipe is greatly improved. After using this device, the qualified rate of the bent pipe is well improved. The coordinated work of the first bending support assembly and the bending pipe assembly makes the bending pipe processing process more stable. The close fit between the first support member and the inner wall of the straight pipe section effectively resists the stress during the bending process, reduces the deformation and shaking of the pipe material, and ensures the accuracy and consistency of the bent pipe. The modular design of the bending pipe assembly enables the rapid replacement of the bending die, adjustment of the parameters of the rotating mechanism and the feeding mechanism according to different bending radii, angles and pipe material specifications, thereby expanding the processing range of the device and meeting more diverse bending pipe processing requirements. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present invention and these drawings.

[0016] Figure 1Schematic structural diagram of a continuous variable-direction processing device for bent pipes in an embodiment of the present invention; Figure 2 is Figure 1 Top-view structural diagram of the continuous variable-direction processing device for bent pipes in the embodiment of; Figure 3 is Figure 2 A - A cross-sectional structural diagram in; Figure 4 is Figure 3 Partial enlarged B structural diagram in; Figure 5 Schematic structural diagram of the first support and bending assembly in another embodiment of the present invention; Figure 6 is Figure 5 Partial enlarged C structural diagram in; In the figure: straight pipe - 1, bent pipe assembly - 2, frame - 201, bending fixed die - 202, bending groove - 203, moving part - 204, pushing die - 205, linear driving part - 206, first support and bending assembly - 3, first main body - 301, first support part - 302, extension rod - 303, through channel - 304, operating rod - 305, first threaded section - 306, first pushing part - 307, first threaded hole - 308, first pushing conical surface - 309, first pushed conical surface - 310, cylindrical support part - 311, second support and bending assembly - 4, second main body - 401, second support part - 402, transmission rod - 403, second threaded section - 404, second pushing part - 405, second threaded hole - 406. Specific embodiments The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0017] For the sake of simplicity of the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent their actual structures as products. In addition, for the sake of simplicity and easy understanding of the drawings, in some figures, parts with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0018] In this text, it should be noted that unless otherwise clearly stipulated and defined, the terms "installed", "connected", and "joined" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the present invention, unless otherwise clearly stipulated and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0020] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0021] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0022] In the prior art, pipe bending failures often occur during the pipe bending process, resulting in unstable pipe bending quality. The pipe bending continuous variable direction processing device of the present invention solves the pipe bending quality problem and realizes stable and high-quality pipe bending continuous variable direction processing by arranging a pipe bending assembly 2 outside the straight pipe 1 and a first pipe supporting and bending assembly 3 inside the pipe. The specific embodiments of this device will be elaborated in detail below.

[0023] As Figures 1 to 6 shown, it shows a pipe bending continuous variable direction processing device in an embodiment of the present invention, which is used to process the straight pipe 1 into a bent pipe. As Figure 1 shown, it includes a pipe bending assembly 2 and a first pipe supporting and bending assembly 3. As Figure 3 、 Figure 4 shown, the overall design of the first main body 301 is cylindrical, and its diameter is adapted to the inner diameter of the straight pipe 1 to be processed. As Figure 4As shown, a plurality of sliding grooves are arranged radially inside the first main body 301. The number of sliding grooves is determined according to actual requirements and is evenly distributed in the circumferential direction of the first main body 301. These sliding grooves are used to install the first support member 302 so that it can slide stably in the radial direction. The first support member 302 is designed in the shape of a slider that matches the sliding groove, and its outer surface is arc-shaped, and the radian fits the inner wall of the straight pipe 1 to ensure good contact with the inner wall of the straight pipe 1.

[0024] The first support member 302 is connected to the operating rod 305 through a transmission structure. When the operating rod 305 is rotated, the first support member 302 can be pushed closer to the inner wall of the straight pipe 1.

[0025] One end of the extension rod 303 is connected to the first main body 301, and a through-channel 304 is opened along the axial direction of the extension rod 303. The diameter of the through-channel is slightly larger than the diameter of the operating rod 305 to ensure that the operating rod 305 can rotate flexibly in the through-channel, and the gap between the two is controlled within a small range to reduce shaking.

[0026] The operating rod 305 is divided into a transmission section located inside the through-channel 304 and an operating section extending outside the through-channel 304. The transmission section can push the first support member 302 to slide, and the operating section is designed in a shape that is convenient for the operator to hold, such as a circular handle is provided at the end, and anti-slip patterns are provided on the handle to increase the friction force and facilitate the operator to rotate the operating rod 305.

[0027] The elbow assembly 2 can adopt the scheme in the prior art. When the straight pipe 1 is processed into an elbow, the first elbow support assembly 3 needs to be inserted into the straight pipe 1, and the position of the first support member 302 is to support at the position to be bent of the straight pipe 1.

[0028] When bending the pipe, the first main body 301 is placed inside the straight pipe 1 so that one end of the extension rod 303 extends outside the straight pipe 1. The operator holds the handle of the operating rod 305 and rotates the operating rod 305 to drive the first support member 302 to slide radially outward along the straight pipe 1 until the arc-shaped outer surface of the first support member 302 fits the inner wall of the straight pipe 1 to provide internal support for the bending process. Then, the elbow assembly 2 is started to process the straight pipe 1 into an elbow. Since the first elbow support assembly 3 provides support inside the straight pipe 1, it effectively prevents problems such as stripe wrinkles and bending of the pipe during the bending process and ensures the quality of the elbow.

[0029] By providing uniform support inside the straight pipe 1 through the first bending support component 3, the appearance of defects such as stripe wrinkles and bending during the pipe bending process is reduced, and the quality of the bent pipe is greatly improved. After using this device, the yield rate of the bent pipe has been well improved. The coordinated work of the first bending support component 3 and the pipe bending component 2 makes the pipe bending process more stable. The close fit between the first support 302 and the inner wall of the straight pipe 1 effectively resists the stress during the bending process, reduces the deformation and shaking of the pipe material, and ensures the accuracy and consistency of the bent pipe. The modular design of the pipe bending component 2 enables the rapid replacement of the bending die and the adjustment of the parameters of the rotating mechanism and the feeding mechanism according to different pipe bending radii, angles, and pipe material specifications, thereby expanding the processing range of the device and meeting more diverse pipe bending processing requirements.

[0030] In some examples, such as Figure 4 shown, the first bending support component is further optimized. By adding a first pusher 307 and using the threaded connection between the first threaded section 306 of the operating rod and the first pusher 307, precise and effective control of the first support 302 is achieved, thereby further improving the quality of the bent pipe and the processing stability. The specific embodiments of this part will be elaborated in detail below.

[0031] The part of the operating rod 305 located inside the through-channel 304, that is, the transmission section, is further optimized in its structure. On this transmission section, a first threaded section 306 is machined. The length of the first threaded section 306 is determined according to the sliding stroke of the first pusher 307 on the first main body 301 and the actual operation requirements, and the pitch of the thread is selected according to the required transmission accuracy and pushing force.

[0032] The first pusher 307 is designed in a conical shape, and its dimensions are designed according to the internal space of the first main body 301 and the position of the first support 302. The length direction is consistent with the axial direction of the straight pipe 1 and is adapted to the dimensions of the internal chute of the first main body 301 to ensure that the first pusher 307 can move stably along the axial direction of the straight pipe 1 on the first main body 301.

[0033] At the central position of the first pusher 307, a first threaded hole 308 is machined along its length direction. The parameters of the first threaded hole 308 match those of the first threaded section 306 of the operating rod 305 to ensure that the two can be screwed together. One end of the first support 302 close to the first pusher 307 is designed with a pushing part, and correspondingly, one end of the first pusher 307 close to the first support 302 is provided with a pushed part matching the pushing part. When the first pusher 307 moves along the axial direction of the straight pipe 1 under the drive of the operating rod 305, through the cooperation of the pushing part and the pushed part, the first support 302 can be stably pushed to slide along the radial direction of the straight pipe 1, ensuring the close fit between the first support 302 and the inner wall of the straight pipe 1.

[0034] During operation, first place the first body 301 into the straight pipe 1, and extend the extension rod 303 outside the pipe. The operator holds the handle of the operating rod 305 and rotates the operating rod 305. Since the first threaded section 306 is threadedly connected to the first threaded hole 308 of the first pusher 307, the rotation of the operating rod 305 is converted into a linear motion of the first pusher 307 along the axial direction of the straight pipe 1. The first pusher 307 cooperates with the pushed part at its end with the pushing part of the first support 302, and pushes the first support 302 to slide radially along the chute of the first body 301 until the arc-shaped outer surface of the first support 302 closely fits the inner wall of the straight pipe 1, providing stable internal support for the pipe bending process.

[0035] Through the threaded transmission between the first pusher 307 and the operating rod 305 and the cooperation with the first support 302, the supporting force and position of the first support 302 on the inner wall of the straight pipe 1 can be controlled more precisely, further reducing the probability of defects such as stripe wrinkles and bends during the pipe bending process.

[0036] The stable axial sliding of the first pusher 307 on the first body 301 and the pushing cooperation with the first support 302 make the support inside the straight pipe 1 more uniform and stable during the pipe bending process, effectively resisting the stress change during the bending process.

[0037] Although this embodiment is mainly optimized for the bending process of the common straight pipe 1, due to the certain flexibility and adjustability of the design of the first pipe bending support assembly 3 and the pipe bending assembly 2, by appropriately adjusting the size of the first support 302, the stroke of the first pusher 307, and the mold and control parameters of the pipe bending assembly 2, it can adapt to the processing of pipes with different diameters, different materials, and different bending requirements, further expanding the application range of the device.

[0038] In some examples, as Figure 4 shown, further optimize the contact mode between the first pusher 307 and the first support 302. By setting the mutually abutting conical surfaces, the driving force can be transmitted more efficiently and precisely, further improving the stability and uniformity of the support on the inner wall of the straight pipe 1 during the pipe bending process, thereby improving the pipe bending quality. The specific embodiments of this part will be elaborated in detail below.

[0039] A first pushing conical surface 309 is machined on the side of the first pusher 307 close to the first support 302. The taper of the first pushing conical surface 309 is determined according to the actual pushing requirements and the structure of the first support 302. A suitable taper design can not only ensure sufficient pushing efficiency but also ensure the smoothness of the pushing process.

[0040] On one side of the first support member 302 close to the first driving member 307, a first driven conical surface 310 matching the first driving conical surface 309 is machined. The size and angle of the first driven conical surface 310 correspond to those of the first driving conical surface 309 to ensure that the two can be in close contact. In the design, considering the stability of the first support member 302 during the radial sliding process, the length of the first driven conical surface 310 is slightly less than the length of the first driving conical surface 309 in the axial direction, for example, 3 - 5 mm shorter, to avoid interference during the sliding process.

[0041] When the first driving member 307 moves axially along the straight pipe 1 under the drive of the operating rod 305, the first driving conical surface 309 abuts against the first driven conical surface 310. Due to the design of the conical surface, during the pushing process, the force transmission is more uniform, and local stress concentration can be avoided. At the same time, the cooperation between the conical surfaces can also play a certain guiding role in the radial sliding of the first support member 302, ensuring that the first support member 302 maintains a stable movement trajectory during the process of approaching or departing from the inner wall of the straight pipe 1.

[0042] When machining the bent pipe, the first main body 301 is placed inside the straight pipe 1, and the extension rod 303 extends outside the pipe. The operator rotates the operating rod 305, and the first threaded section 306 of the operating rod 305 interacts with the first threaded hole 308 of the first driving member 307, causing the first driving member 307 to move axially along the straight pipe 1. As the first driving member 307 moves, its first driving conical surface 309 closely abuts against the first driven conical surface 310 of the first support member 302 and pushes the first support member 302. Due to the guiding and force transmission characteristics of the conical surface, the first support member 302 can stably slide radially along the chute of the first main body 301 until it closely fits against the inner wall of the straight pipe 1, providing reliable internal support for the bent pipe process.

[0043] The design of the first driving conical surface 309 and the first driven conical surface 310 makes the force transmission more uniform and efficient, and the support of the first support member 302 to the inner wall of the straight pipe 1 more stable and uniform. This further reduces the possibility of defects during the bent pipe process, and the qualified rate of the bent pipe is improved. In the inspection of a large number of bent pipe products, it is found that problems such as surface wrinkles and internal stress concentration caused by uneven support hardly appear anymore, significantly improving the quality and appearance quality of the bent pipe.

[0044] The conical surface cooperation not only improves the force transmission efficiency but also plays a guiding role in the movement of the first support member 302, enhancing its stability during the radial sliding process. During the bent pipe process, the first support member 302 can more accurately fit against the inner wall of the straight pipe 1, providing more stable internal support for the bent pipe. This further improves the accuracy of the bent pipe, greatly enhancing the consistency and accuracy of the bent pipe, and meeting the processing requirements of higher precision.

[0045] In some examples, such as Figure 6As shown in the figure, the number of the first support members 302 can be designed to be arranged circumferentially in several numbers. According to the diameter and material characteristics of the straight pipe 1 to be processed, the number of the first support members 302 can be flexibly determined. For thin-walled pipes with a smaller inner diameter less than 100 mm, 2 or 3 first support members 302 are sufficient to provide effective support. For pipes with a larger inner diameter greater than 200 mm or harder materials, the number needs to be increased to 6 first support members 302 to ensure that the pressure can be evenly dispersed and sufficient supporting force can be provided during pipe bending.

[0046] These first support members 302 are arranged circumferentially and uniformly around the axis of the straight pipe 1 on the first main body 301. On the circumferential surface of the first main body 301, radial sliding grooves are processed according to the number of the first support members 302. For example, when 4 first support members 302 are provided, the included angle between adjacent sliding grooves is 90°; when 5 are provided, the included angle is 72°. This layout enables the inner wall of the straight pipe 1 to be evenly stressed in all directions during pipe bending, effectively avoiding local deformation.

[0047] Each first support member 302 is in the shape of a slider adapted to the sliding groove, and its outer arc surface fits the inner wall of the straight pipe 1. Considering the collaborative support, its size is slightly adjusted, and the width and height are determined according to the size of the sliding groove of the first main body 301 to ensure smooth sliding.

[0048] When processing a bent pipe, the first main body 301 is placed inside the straight pipe 1, and the extension rod 303 extends out. The operating rod 305 is rotated to drive the first pusher 307 to move axially. The pushing structures on the first pusher 307 act on multiple first support members 302 respectively, causing them to slide radially along the sliding groove until each first support member 302 evenly and tightly fits the inner wall of the straight pipe 1. The pipe bending assembly 2 is started to perform the pipe bending operation. Multiple first support members 302 uniformly support the inner wall of the straight pipe 1 in all directions during pipe bending, disperse stress, prevent defects such as wrinkles and depressions, and ensure the accuracy and stability of pipe bending.

[0049] The multiple first support members 302 are arranged circumferentially to provide more uniform support, and the yield rate of bent pipes is improved. The surface of the bent pipe is smooth and the internal structure is uniform, and there are very few quality problems related to support. The uniform support reduces the deformation and shaking of the pipe during pipe bending, and greatly improves the accuracy of pipe bending. In complex continuous variable-direction pipe bending, the angle deviation is controlled to meet the requirements of high-precision industrial production.

[0050] In some examples, as Figure 6 shown, each cylindrical support part 311 is in the shape of a cylinder. A number of cylindrical support parts 311 are sequentially hinged through small hinge shafts. The hinge shafts are perpendicular to the axis of the straight pipe 1 to ensure that the cylindrical support parts 311 can continuously change direction according to the bending direction of the pipe during pipe bending. A small gap is designed at the hinge between adjacent cylindrical support parts 311, which not only allows the cylindrical support parts 311 to rotate relative to each other, but also prevents excessive gaps from being generated due to shaking during pipe bending, affecting the support effect.

[0051] On the side of the first support member 302 close to the inner wall of the straight pipe 1, a long strip-shaped installation groove is machined, and a plurality of cylindrical support portions 311 are hinged to each other and installed in the long strip-shaped installation groove. In order to ensure that the cylindrical support portion 311 can still provide support for the straight pipe 1 while being able to rotate, a corresponding strip-shaped support groove needs to be provided on the first main body 301, and a support guiding portion is machined on the cylindrical support portion 311, so that the support guiding portion can slide and rotate in the arc-shaped support groove, enabling the cylindrical support portion 311 to provide a stable support force.

[0052] When bending the bent pipe, the first main body 301 of the first pipe bending assembly 3 is placed inside the straight pipe 1. The operator rotates the operating rod 305, driving the first pushing member 307 to move, and then pushing the first support member 302 closer to the inner wall of the straight pipe 1. At this time, the cylindrical support portions 311 move together with the first support member 302 until they are in contact with the inner wall of the straight pipe 1, providing initial support for bending the pipe.

[0053] During the pipe bending process, when the pipe starts to bend under the action of the pipe bending assembly 2, due to the hinged structure between the cylindrical support portions 311 and the design that the hinge axis is perpendicular to the axial direction of the straight pipe 1, the cylindrical support portions 311 can continuously change direction according to the bending direction of the pipe. For example, when the pipe starts to bend in a certain direction, the cylindrical support portions 311 close to the bending side will rotate relatively to adapt to the shape change of the inner wall of the pipe, always maintaining close contact with the inner wall, evenly dispersing the stress generated during the pipe bending process, and preventing problems such as local deformation and wrinkles of the pipe. The cylindrical support portions 311 on multiple first support members 302 work together to comprehensively ensure the quality and accuracy of the bent pipe.

[0054] The hinged design of the cylindrical support portions 311 enables them to continuously change direction during pipe bending and closely fit the inner wall of the bent pipe, effectively avoiding problems such as uneven surface of the bent pipe and internal stress concentration caused by non-conforming support. The qualified rate of the bent pipe is further improved. In the inspection of the bent pipe products, it is found that the surface quality of the bent pipe is significantly improved, and there are almost no defects caused by support problems.

[0055] This design enables the device to better adapt to various complex bent pipe shapes and continuous direction change requirements. Whether it is a simple arc-shaped bent pipe or a multi-segment continuous direction change bent pipe with different angles, the cylindrical support portions 311 can flexibly adjust the direction, provide stable support for the pipe, expand the application range of the device, and meet more special bent pipe processing requirements.

[0056] The hinged structure between the cylindrical support portions 311 and their close combination with the first support member 302 ensure the stable transmission of the support force during the pipe bending process. Even when the bending angle of the pipe changes greatly, the cylindrical support portions 311 can still work together and will not show the situation of local support failure, enhancing the stability of the entire pipe bending process and further improving the pipe bending accuracy.

[0057] In some examples, such as Figure 4 shown, a second bending and supporting component 4 can also be added. The second main body 401 of the second bending and supporting component 4 is cylindrical, and it is adapted to the internal space of the straight pipe 1 according to actual requirements and effectively supports. The second main body 401 is connected to the first main body 301 through a hinge component, and the hinge axis is perpendicular to and coplanar with the axis of the straight pipe 1, enabling the second main body 401 to rotate relative to the first main body 301 within a plane perpendicular to the pipe axis to adapt to changes in the bending angle and direction of the bent pipe.

[0058] The second supporting member 402 of the second bending and supporting component 4 is in the shape of a slider adapted to the chute of the second main body 401, and its outer arc surface fits the inner wall of the straight pipe 1. The second supporting member 402 can be driven to slide radially along the straight pipe 1. According to the diameter of the straight pipe 1 and the complexity of the bent pipe, 2 - 4 second supporting members 402 are provided, which are evenly distributed in the circumferential direction of the second main body 401 and echo the first supporting member 302 to provide comprehensive support.

[0059] During the processing of the bent pipe, the second main body 401 of the second bending and supporting component 4 is connected to the first main body 301 through a hinge and placed in the straight pipe 1, so that the second supporting member 402 is in a suitable starting position. Operations are carried out to make the second supporting member 402 close to the inner wall of the straight pipe 1 to complete the preparation. The first supporting member 302 provides support. At the same time, due to the hinge connection between the second main body 401 and the first main body 301, the second main body 401 automatically rotates within a plane perpendicular to the pipe axis as the shape and angle of the bent pipe change, driving the second supporting member 402 to adjust its position and supporting direction, and cooperating with the first supporting member 302 to ensure that all parts of the inner wall of the straight pipe 1 are uniformly and stably supported, avoiding defects in the bent pipe.

[0060] The difference between the second bending and supporting component 4 and the first bending and supporting component 3 is that the first bending and supporting component 3 further includes an extension rod 303, and the elements directly connecting the second bending and supporting component 4 and the first bending and supporting component 3 are different. The second bending and supporting component 4 is connected to the first bending and supporting component 3, and the first main body 301 of the first bending and supporting component 3 is connected to the extension rod 303.

[0061] The second bending and supporting component 4 cooperates with the first bending and supporting component 3 to form a comprehensive and flexible supporting system to adapt to complex bent pipes. During bending, the inner wall is supported more uniformly and stably, reducing defects, improving the yield rate, with a uniform internal structure and almost no defects caused by support. The hinge connection between the second main body 401 and the first main body 301 and the adjustability of the second supporting member 402 enable the device to adapt to different bent pipe requirements. Whether it is a simple or complex bent pipe, it can provide appropriate support, expand the applicable range, and meet more processing specifications. In complex variable - direction bent pipes, the second bending and supporting component 4 can adjust the support according to the real - time changes of the bent pipe and cooperate with the first bending and supporting component 3 to ensure the bending stability of the pipe material. In some examples, such as Figure 4As shown, a transmission rod 403 can also be designed. The transmission rod 403 is in the shape of a slender cylinder, and its size is determined according to the space of the second body 401 and the torque requirement. It is installed in the bearing seat of the second body 401 to reduce rotational runout. There is a second threaded section 404 at one end close to the second support member 402, and the operating rod 305 is rotated to drive the transmission rod 403.

[0062] The second pusher 405 is in the shape of a tapered cylinder, and there is a second threaded hole 406 along the length direction in the center, which is matched with the second threaded section 404. A plurality of corresponding pushing parts are arranged at the end close to the second support member 402, which are adapted to the pushed parts of the second support member 402 to push it to slide radially.

[0063] When bending the bent pipe, the operating rod 305 is rotated, and the operating rod 305 drives the transmission rod 403 to rotate. Due to the threaded connection, the rotation of the transmission rod 403 is converted into the axial linear motion of the second pusher 405. The pushing part at the end of the second pusher 405 pushes the pushed part of the second support member 402, so that it slides radially along the chute to adjust the distance from the inner wall of the straight pipe 1. When bending the pipe, the operating rod 305 synchronously controls the first and second support members to provide stable support according to the change of the bent pipe.

[0064] The position of the second support member 402 is accurately controlled, the angle deviation of the complex bent pipe is reduced, the radius deviation is reduced, and high-precision production is satisfied. One operating rod 305 controls two components, simplifies the process, reduces the operation difficulty, improves the efficiency, and reduces the quality problems. The high-precision bearing is matched with the tight chute to ensure stable and reliable transmission, reduce the maintenance cost and downtime. The matching structure enables the effective transmission of power, improves the quality of the bent pipe, and increases the yield rate.

[0065] In some examples, as Figure 4 shown, the transmission rod 403 is connected to the operating rod 305 by a universal transmission. A cross-axis universal joint or a ball hinge universal coupling is selected to realize the universal transmission connection between the transmission rod 403 and the operating rod 305. The cross-axis universal joint has the characteristics of compact structure and high transmission efficiency, and can effectively meet the power transmission requirements at different angles. Ensure that when transmitting power, even if the angle between the operating rod 305 and the transmission rod 403 can be deflected, the smooth and efficient transmission can be continuously realized.

[0066] A plurality of second support and bending assemblies 4 are arranged in sequence in the straight pipe 1. The specific quantity is determined according to the length, diameter and bending complexity of the bent pipe. For example, for pipes with shorter length, smaller diameter and relatively simple bending, a smaller number of second support and bending assemblies 4 can be set; while for pipes with longer length, larger diameter and requiring complex continuous variable-direction bending, a larger number of second support and bending assemblies 4 may be required.

[0067] The second bodies 401 of two adjacent second bending and supporting components 4 are connected to each other through a hinge structure. The transmission rods 403 of two adjacent second bending and supporting components 4 are also connected by a cross universal joint to achieve universal transmission connection. This connection method ensures that during the pipe bending process, even if the relative positions and angles of two adjacent second bending and supporting components 4 change, the power transmission between the transmission rods 403 will not be affected, thus ensuring that each second supporting member 402 can work synchronously and stably.

[0068] When processing the bent pipe, the operator rotates the operating rod 305, and the operating rod 305 transmits power to the transmission rod 403 through a cross universal joint. Due to the existence of the universal joint, even if there is a certain angle between the operating rod 305 and the transmission rod 403, the power can still be transmitted smoothly. When the transmission rod 403 rotates, through the screw drive between the second screw section 404 and the second screw hole 406 of the second pusher 405, the second pusher 405 is driven to move axially along the straight pipe 1, and then the second supporting member 402 is pushed to slide radially along the chute of the second body 401, realizing the support adjustment of the inner wall of the straight pipe 1.

[0069] During the pipe bending process, multiple second bending and supporting components 4 arranged in sequence work together. As the pipe is bent, the second bodies 401 of two adjacent second bending and supporting components 4 will rotate relative to each other due to the change in the shape of the pipe, and the angle adjustment is achieved through the hinge structure. At the same time, since the transmission rods 403 are connected by universal joints, even if the relative angle of the second bodies 401 changes, the power can be sequentially transmitted from the operating rod 305 to each transmission rod 403, ensuring that each second supporting member 402 can synchronously adjust the support position and strength according to the actual requirements of the pipe bending, providing uniform, stable and continuously changing support for the inner wall of the straight pipe 1, and effectively adapting to complex pipe bending shapes and continuous direction-changing requirements.

[0070] The universal transmission connection between the transmission rod 403 and the operating rod 305 and between adjacent transmission rods 403 enables each second bending and supporting component 4 to more flexibly adapt to the complex changes in the shape and angle of the pipe during the pipe bending process. During multi-segment continuous variable-direction bending at different angles, each second supporting member 402 can accurately adjust its position and support strength, effectively expanding the adaptation range of the device to various complex pipe bending processes and meeting the requirements of more special pipe bending processes.

[0071] The coordinated work of multiple second bending and supporting components 4 and the synchronization ensured by the universal transmission connection enable each part of the inner wall of the straight pipe 1 to be supported more accurately and uniformly during the pipe bending process. This further improves the accuracy of the pipe bending. Compared with the situation of only using a single second bending and supporting component or non-universal transmission connection, the accuracy has been significantly improved, meeting the extremely high requirements for pipe bending accuracy in high-end fields such as aerospace and precision instrument manufacturing.

[0072] The hinge structure between the second main bodies 401 and the universal transmission connection between the transmission rods 403 can effectively buffer and disperse the stress generated by the bending of the pipe during the pipe bending process, reducing the impact force borne by a single component. Through the universal transmission connection, when the operator rotates the operating rod 305, there is no need to overly concern about the angular relationship between the operating rod and the transmission rod, and the operation is smoother and more flexible. Moreover, multiple second pipe bending components can respond to the control of the operating rod synchronously, simplifying the operation process, reducing the operation difficulty, and improving the work efficiency and operation experience of the operator.

[0073] In some examples, such as Figure 1 shown, the frame 201 is a frame structure, and stiffening plates are provided at each connection of the frame to enhance stability and load-bearing capacity, and its size is determined according to the actual production site and the size of the pipe to be processed. The bending fixed die 202 is fixedly installed on one side of the frame 201 and has a bending groove 203. The shape of the bending groove 203 is adapted to common pipe bending radii and angles, and the specific bending radius can be adjusted by replacing the internal bushing. The bending fixed die 202 is connected to the frame 201 through bolts and positioning pins. The moving part 204 is a sliding structure, connected to the frame 201 through a linear guide pair, and is pushed to move for pipe pressing. The pushing die 205 is rotatably arranged on the moving part 204 and can perform angle self-adaptive adjustment during pipe bending processing.

[0074] The first pipe bending component 3 is located between the bending fixed die 202 and the pushing die 205. During pipe bending, the straight pipe 1 is placed in the bending groove 203 of the bending fixed die 202, and the first pipe bending component 3 is placed inside the straight pipe 1 to provide support. The moving part 204 drives the pushing die 205 to approach the straight pipe 1 for bending, and during this period, the first pipe bending component 3 adjusts the supporting force as needed.

[0075] Each component cooperates to ensure uniform stress on the pipe, reduce pipe bending defects, and improve the qualified product rate. The pipe bending angle deviation can be controlled within ±0.1°, and the radius deviation is controlled within ±0.1 mm. The rapid movement and angle adjustment shorten the processing and rework time and improve production efficiency. It can adapt to various pipe bending radius and angle requirements and expand the processing range. The reasonable structural design and control system ensure the stable operation of the equipment, reducing the failure rate and maintenance cost.

[0076] In some examples, such as Figure 1 shown, two pushing dies 205 are provided, respectively located on both sides of the bending fixed die 202. This layout enables the straight pipe 1 to receive relatively uniform pressure from both sides during the pipe bending process, which helps to more accurately control the shape and angle of the pipe bending and avoid problems such as pipe offset or uneven bending caused by unilateral pressure. Both of the two pushing dies 205 are rotatably arranged on the moving part 204 through a rotating shaft, and the linear drive part 206 selects a hydraulic cylinder to achieve stable bending of the straight pipe.

[0077] Two pushing dies 205 are located on both sides of the bending fixed die 202 to press and bend simultaneously, making the straight pipe 1 more evenly stressed and effectively reducing the shape deviation during the pipe bending process. Combined with the precise control of the angle adjustment mechanism and the linear drive 206, the angle deviation of the bent pipe can be further controlled within ±0.05°, and the radius deviation is controlled within ±0.05 mm, which can meet the higher-precision industrial production requirements, such as the stringent requirements for pipe bending accuracy in fields such as aerospace and precision instrument manufacturing.

[0078] The two pushing dies 205 on both sides work together to balance the pressure during the pipe bending process, reduce the shaking and deviation of the pipe during the bending process, and make the pipe bending process more stable. This not only helps to improve the accuracy of the bent pipe, but also reduces the risk of die wear and equipment failure caused by the instability of the pipe, and extends the service life of the equipment.

[0079] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A device for continuously changing the direction of a bent pipe, used for processing a straight pipe (1) into a bent pipe, characterized in that: It comprises a pipe bending assembly (2) and a first bracing and bending assembly (3), wherein the pipe bending assembly (2) and the first bracing and bending assembly (3) are respectively used to be located outside and inside the straight pipe (1), and the first bracing and bending assembly (3) comprises: A first main body (301), the first main body (301) being used to be placed inside the straight tube (1); a first support member (302), the first support member (302) being slidably disposed on the first main body (301) along the radial direction of the straight tube (1), and being configured to be able to move closer to or farther from the inner wall of the straight tube (1) after sliding; An extension rod (303), one end of the extension rod (303) being connected to the first main body (301), and the other end of the extension rod (303) extending out of the straight tube (1) along the axial direction of the straight tube (1), and the extension rod (303) having a through passage (304); An operating rod (305) is rotatably disposed in the through-channel (304), one end of the operating rod protruding out of the through-channel (304), and the other end is configured to drive the first support member (302) to slide close to the inner wall of the straight tube (1) after rotation.

2. The device for continuously changing the direction of a bent pipe according to claim 1, characterized in that: The operating rod (305) has a first threaded section (306), and the first support bending assembly (3) further comprises: A first pushing member (307), the first pushing member (307) is slidably disposed on the first main body (301), and the sliding direction is along the axial direction of the straight tube (1), the first pushing member (307) has a first threaded hole (308), the first threaded hole (308) is threadedly connected to the first threaded section (306), and the first pushing member (307) is configured to push the first support member (302) to move after sliding.

3. The device for continuously changing the direction of a bent pipe according to claim 2, characterized in that: The first pushing member (307) has a first pushing conical surface (309) on one side close to the first supporting member (302), and the first supporting member (302) has a first pushed conical surface (310) on one side close to the first pushing member (307), and the first pushing conical surface (309) abuts against the first pushed conical surface (310).

4. The device for continuously changing the direction of a bent pipe according to claim 1, characterized in that: The first support members (302) are at least two arranged around the axial circumference of the straight tube (1).

5. The device for continuously changing the direction of a bent pipe according to claim 4, characterized in that: The first support member (302) has a plurality of cylindrical support portions (311) on one side close to the inner wall of the straight tube (1), and the plurality of cylindrical support portions (311) are hinged in sequence, and the hinge axis is perpendicular to the axial direction of the straight tube (1), so as to continuously change direction when the straight tube (1) is processed into a bent tube.

6. The device for continuously changing the direction of a bent pipe according to claim 4, characterized in that: It also includes a second bracing and bending assembly (4), wherein the second bracing and bending assembly (4) includes: A second main body (401), the second main body (401) being hinged to the first main body (301), and the hinge axis being perpendicular and coplanar with the tube axis of the straight tube (1); A second support member (402), the second support member (402) is slidably disposed on the second main body (401) along the radial direction of the straight tube (1), and is configured to be able to move closer to or farther from the inner wall of the straight tube (1) after sliding.

7. The device for continuously changing the direction of a bent pipe according to claim 6, characterized in that: The second bracing and bending assembly (4) further comprises: a transmission rod (403), the transmission rod (403) being rotatably disposed on the second main body (401) and being in transmission connection with the operating rod (305) and configured to be driven to rotate by the operating rod (305), the transmission rod (403) having a second threaded section (404); A second pushing member (405), the second pushing member (405) is slidably disposed on the second main body (401), and the sliding direction is along the axial direction of the straight tube (1), the second pushing member (405) has a second threaded hole (406), the second threaded hole (406) is threadedly connected to the second threaded section (404), and the second pushing member (405) is configured to push the second support member (402) to move after moving.

8. The device for continuously changing the direction of a bent pipe according to claim 7, characterized in that: The transmission rod (403) is universally connected to the operating rod (305); a plurality of the second bracing and bending assemblies (4) are arranged in sequence, and the second bodies (401) of two adjacent second bracing and bending assemblies (4) are hinged to each other, and the transmission rods (403) of two adjacent second bracing and bending assemblies (4) are universally connected.

9. A device for continuously changing the direction of a bent pipe according to any one of claims 1 to 8, characterized in that: The elbow assembly (2) comprises: Rack(201); A bending fixed die (202), the bending fixed die (202) being arranged on the frame (201) and having a bending groove (203); A moving member (204), the moving member (204) being movably disposed on the frame (201) and configured to move closer to or farther from the bending fixed die (202) after movement; A push die (205) is rotatably disposed on the movable member (204), and is used to press and bend the straight tube (1) between the bending fixed die (202) and the push die (205); the first support bending assembly (3) is located between the bending fixed die (202) and the push die (205).

10. The device for continuously changing the direction of a bent pipe according to claim 9, characterized in that: There are two push dies (205), which are respectively located on both sides of the bending fixed die (202), and further include: A linear driving member (206), wherein the linear driving member (206) is used to push the moving member (204) to move.

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