Pipe end flanging device

Abstract

The utility model discloses a pipe end flanging device, which belongs to the technical field of pipe processing equipment and comprises a clamping component and a flanging component. The clamping assembly comprises an upper die and a lower die which can move relatively, and a clamping space used for clamping a pipe in the radial direction is formed between the upper die and the lower die. The flanging assembly comprises a movable flanging head, the flanging head and the pipe are coaxially arranged, and the flanging head can be inserted into the end of the pipe. The flanging head is sequentially provided with a guide part used for guiding a pipe to move, an arc transition part used for folding the pipe into a flanging and a shaping part used for shaping the flanging from outside to inside. According to the utility model, the flanging can be formed at the end part of the pipe, so that the secondary injection molding processing of the flange sleeve is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing equipment technology, and in particular to a pipe end flange device. Background Technology

[0002] During the production of RTP pipes, the RTP pipes need to be cut according to different application environments. In order to facilitate the connection and sealing between pipes, flange sleeves need to be injection molded at the ends of the cut RTP pipes.

[0003] However, because RTP pipes have an internal steel wire resin mesh intermediate layer, directly processing the ends of RTP pipes can easily lead to deformation of the steel wire resin mesh and weak connection strength. Utility Model Content

[0004] In view of this, it is necessary to provide a pipe end flange device to solve the problems of difficult injection molding of flange sleeves and weak connection strength of existing RTP pipes.

[0005] This utility model provides a pipe end flange device, which preheats the pipe to a deformable molten state, including:

[0006] A clamping assembly comprising an upper die and a lower die that are movable relative to each other, wherein a clamping space for radially clamping a pipe is formed between the upper die and the lower die;

[0007] A flange assembly, comprising a movable flange head, the flange head being coaxially arranged with the pipe and capable of being inserted into the end of the pipe; the flange head being provided, from the outside to the inside, with a guide portion for guiding the movement of the pipe, an arc transition portion for folding the pipe into a flange, and a shaping portion for shaping the flange.

[0008] Furthermore, the arc transition portion is folded outward at 90° relative to the axial direction of the flange head, so as to fold the end of the tube into a first flange.

[0009] Furthermore, the flanging assembly also includes a flanging sleeve, which is sleeved on the shaping part and detachably connected to the shaping part. The flanging sleeve can fold the first flanging 90° twice to form a second flanging.

[0010] Furthermore, the shaping part is arranged perpendicular to the axis of the flange head, the shaping part extends radially along the flange head and is integrally connected with the arc transition part, and the projection of the arc transition part relative to the shaping part is located in the shaping part.

[0011] Furthermore, the cross-sectional shape and size of the guide portion are consistent with the cross-sectional shape and size of the inner cavity of the pipe; the axial length of the guide portion is greater than twice the length of the arc transition portion.

[0012] Furthermore, the guide portion is also provided with a chamfered portion at the end near the tube.

[0013] Furthermore, the side of the shaped portion away from the arc transition portion is provided with a connecting portion for connecting with the outside world.

[0014] Furthermore, the flange assembly also includes a horizontal drive unit, which is detachably connected to the connecting part.

[0015] Furthermore, the clamping assembly also includes a vertical drive unit, the drive end of which is fixedly connected to the upper mold, and the lower mold is fixedly connected to the frame. The vertical drive unit is capable of driving the upper mold to move relative to the lower mold.

[0016] Furthermore, the upper and lower molds are respectively provided with mold holes adapted to the outer diameter of the pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] (1) A pipe end flanging device of the present invention is provided with a clamping assembly, which includes an upper mold and a lower mold that can move relative to each other, forming a clamping space for radially clamping the pipe. The clamping space can clamp the pipe radially and prevent the pipe from moving axially. The clamping space can also position the pipe so that the flanging assembly is adapted to the end of the pipe, and avoid misalignment of the pipe relative to the flanging assembly.

[0019] (2) A pipe end flanging device of this utility model is provided with a flanging assembly, which includes a movable flanging head. The flanging head is coaxially arranged with the pipe, so that the pipe can be aligned and fitted with the flanging head. The flanging head is inserted into the end of the pipe and can act evenly on the inner wall of the pipe. The flanging head is provided with a guide part, a circular arc transition part and a shaping part from the outside to the inside. The guide part can guide the pipe to move along a predetermined trajectory and eliminate the interference of pipe end burrs on the flanging. The two ends of the circular arc transition part are respectively connected to the guide part and the shaping part. The circular arc transition part can fold the pipe to form a flanging and can disperse the material flow stress. The shaping part can shape the folded flanging. The shape of the flanging that fits the shaping part is defined, which helps the flanging to be formed. The flanging can improve the connection strength between the flange and the pipe. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the flange assembly in this utility model;

[0023] Figure 3 This is a schematic diagram of the connection structure between the flange head and the flange sleeve in this utility model. Figure 1 ;

[0024] Figure 4 This is a schematic diagram of the connection structure between the flange head and the flange sleeve in this utility model. Figure 2 ;

[0025] Figure 5 This is a schematic diagram of the structure of the flange head in this utility model;

[0026] Figure 6 This is a schematic diagram of the clamping assembly in this utility model;

[0027] Figure 7 This is a structural schematic diagram of the lower mold in this utility model.

[0028] In the diagram, 100 is the clamping assembly; 110 is the upper mold; 120 is the lower mold; 130 is the vertical drive unit; 140 is the mold hole; 200 is the flanging assembly; 210 is the flanging head; 211 is the guide part; 212 is the arc transition part; 213 is the shaping part; 214 is the chamfering part; 215 is the connecting part; 220 is the flanging sleeve; and 230 is the horizontal drive unit. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0030] This embodiment of a pipe end flanging device relates to the field of pipe processing equipment technology. It uses a flanging head 210 to punch and shape the hot-melt pipe to form a flanging at the end of the pipe, which helps to process the flange sleeve in the secondary injection molding process. This can not only ensure the connection strength between the flange sleeve and the pipe body, but also effectively avoid damaging the strength of the pipe body.

[0031] Please see Figures 1 to 7 This embodiment of a pipe end flanging device includes: a clamping assembly 100 and a flanging assembly 200. The clamping assembly 100 can clamp the pipe to prevent axial displacement of the pipe. The flanging assembly 200 can act on one end of the pipe to form a flanging.

[0032] The clamping assembly 100 includes a relatively movable upper mold 110 and a lower mold 120, which form a clamping space for radially clamping the pipe. The clamping space can clamp the pipe radially and prevent axial movement of the pipe. The clamping space can also position the pipe so that the flange assembly 200 is adapted to the end of the pipe, preventing the pipe from being misaligned relative to the flange assembly 200.

[0033] The flange assembly 200 includes a movable flange head 210, which is coaxially arranged with the pipe, allowing the pipe to be aligned and fitted with the flange head 210. The flange head 210 is inserted into the end of the pipe and can evenly act on the inner wall of the pipe. The flange head 210 has a guide portion 211, an arc transition portion 212, and a shaping portion 213 arranged sequentially from the outside to the inside. The guide portion 211 guides the pipe to move along a predetermined trajectory and eliminates interference from pipe end burrs on the flange. The arc transition portion 212 connects the guide portion 211 and the shaping portion 213 at its two ends, respectively. The arc transition portion 212 can fold the pipe to form a flange and can disperse material flow stress. The shaping portion 213 can shape the folded flange. The shape of the flange conforming to the shaping portion 213 is defined, which helps in the forming of the flange. The flange can improve the connection strength between the flange and the pipe.

[0034] It should be noted that the ends of the pipe need to be preheated to put the pipe in a deformable, molten state, thereby enhancing the pipe's plasticity.

[0035] In some embodiments, the arc transition portion 212 is folded outward by 90° relative to the axial direction of the flange head 210, thereby folding the end of the pipe into a first flange. The presence of the first flange facilitates the subsequent secondary injection molding of the flange sleeve.

[0036] In practical implementation, the arc transition section 212 is an arc-shaped transition structure set on the outer surface of the flange 210. Specifically, it can be implemented using an arc surface with a radius ranging from 5 to 15 mm. Its function is to guide the material flow at the end of the pipe through continuous curvature changes. The extension direction of the arc transition section 212 forms a perpendicular angle with the axis of the flange 210, which can smoothly fold the end of the pipe.

[0037] When the flange head 210 is inserted into the end of the pipe, the guide portion 211 contacts the inner wall of the pipe for positioning, and then the arc transition portion 212 applies radial pressure to the end of the pipe. As the flange head 210 continues to advance, the end of the pipe gradually folds outward along the curved surface of the arc transition portion 212, eventually forming a first flange perpendicular to the pipe axis. During this process, the 90° folding angle of the arc transition portion 212 ensures uniform material deformation and prevents the steel wire resin mesh intermediate layer from cracking due to excessive local stress.

[0038] In some embodiments, the flange assembly 200 further includes a flange sleeve 220, which is sleeved on the shaping part 213 and detachably connected to the shaping part 213. The flange sleeve 220 can be folded twice to form a second flange by 90°, thereby further optimizing the injection molding conditions of the flange sleeve.

[0039] In practical implementation, the flanged sleeve 220 is an annular structure fitted onto the outside of the shaping part 213. It can be implemented using a split metal sleeve, used to apply secondary forming pressure to the pipe end that has already undergone its first fold. The flanged sleeve 220 and the shaping part 213 can be separable, achieved through threaded engagement or snap-fit ​​structures, facilitating the replacement of sleeves of different specifications according to processing requirements. An inner flange that mates with the shaping part 213 is provided on the side of the flanged sleeve 220 relatively away from the guide part 211, and can be connected to the shaping part 213 as a single unit using bolts. The pipe end that has already undergone a 90° fold is then subjected to a second vertical bending action. Through the engagement of the sleeve and the shaping part 213, two consecutive 90° bends are formed, resulting in an L-shaped cross-section structure at the pipe end.

[0040] After the first 90° fold is completed to form the first flange, the flange sleeve 220 is fitted onto the outside of the shaping part 213. As the flange head 210 continues to advance into the tube, the outer wall of the sleeve contacts the free end of the first flange, and under axial pressure, the first flange is forced to bend 90° a second time along the outer wall of the sleeve.

[0041] Traditional flanging processes can only achieve a single bend, failing to create a multi-layered reinforced structure, and direct bending easily leads to interlayer delamination of the composite material. This solution adds a replaceable sleeve, superimposing a secondary bending process on top of the initial forming, creating a stepped double-layer flanging structure at the end of the pipe. This increases the mechanical strength of the connection by 215 degrees and avoids material damage caused by a single large-angle bend.

[0042] In some embodiments, the shaping portion 213 is disposed perpendicular to the axis of the flange head 210. The shaping portion 213 extends radially along the flange head 210 and is integrally connected with the arc transition portion 212. The projection of the arc transition portion 212 relative to the shaping portion 213 is located in the shaping portion 213. The pipe subjected to the arc transition portion 212 is relatively folded and extends outward continuously along the shaping portion 213. The shaping portion 213 can shape the end of the first flange so that the end of the first flange is relatively straight.

[0043] In the specific implementation process, the extension direction of the shaping part 213 forms a right angle with the central axis of the flange head 210. This can be achieved by using a planar plate structure or an annular boss structure to limit the final angle of the flange forming.

[0044] The radial extension of the shaping part 213 along the flange head 210 means that the shaping part 213 extends from the axis to the outer periphery. It is generally achieved by using a ring platform structure of uniform thickness to provide sufficient contact area to constrain the shape of the tube after folding.

[0045] The projection of the arc transition portion 212 in the axial direction completely covers the area of ​​the shaping portion 213. Specifically, this can be achieved by adjusting the ratio between the arc radius and the width of the shaping portion 213 to ensure the continuity of material flow during the folding process.

[0046] When the flange head 210 is inserted into the end of the pipe, the guide part 211 guides the pipe to move along the axis, and the arc transition part 212 folds the end of the pipe to form the first flange. At this time, the shaping part 213 provides radial support to the folded pipe through the integrated structure with the arc transition part 212. Since the shaping part 213 is perpendicular to the axis and its projection range covers the arc transition part 212, the radial force on the pipe during the folding process is evenly distributed, avoiding damage to the steel wire resin mesh layer caused by local deformation. At the same time, the integrated connection structure eliminates the gaps that may exist in the traditional split design, making the end of the pipe after flange forming stable in shape and burr-free at the edge.

[0047] In some embodiments, the cross-sectional shape and size of the guide portion 211 are consistent with the cross-sectional shape and size of the inner cavity of the pipe, which can eliminate the assembly gap between the pipe and the guide portion 211, enhance the fit between the pipe and the guide portion 211, and the guide portion 211 can accurately guide the pipe to the arc transition portion 212 to realize the flanging treatment of the pipe.

[0048] The axial length of the guide portion 211 is more than twice the length of the arc transition portion 212. By extending the guide contact distance, a stable linear guide trajectory can be formed.

[0049] In practical implementation, the guide part 211 is a structure set at the front end of the flange head 210 to guide the movement of the pipe. Specifically, it can be implemented using a columnar structure that perfectly matches the geometry of the inner cavity of the pipe. The axial length is the extension dimension of the guide part 211 along the axial direction of the flange head 210, and can be implemented using a value range of 1.5 to 3 times the inner diameter of the pipe.

[0050] When the flange 210 is inserted into the end of the pipe, the guide portion 211 forms a surface contact fit with the inner wall of the pipe. Since the cross-section of the guide portion 211 perfectly matches the inner cavity of the pipe, radial displacement of the pipe during axial movement is avoided. The design of setting the axial length to more than twice that of the arc transition portion 212 ensures that the end of the pipe is adequately guided and positioned before the folding action begins.

[0051] In some embodiments, the guide portion 211 is further provided with a chamfered portion 214 at one end near the pipe. The chamfered portion 214 can reduce the frictional resistance when the end face of the guide portion 211 contacts the inner wall of the pipe, and prevent the end of the pipe from being scratched or deformed during insertion. The chamfered portion 214 can also guide the pipe to align with the guide portion 211, eliminating any possible minor deviations and misalignments.

[0052] In the specific implementation process, the chamfered part 214 is a beveled or arc transition structure formed on the edge of the end face of the guide part 211. Specifically, the beveled or arc chamfer can be formed on the edge of the end face of the guide part 211 by machining or chamfering tool.

[0053] As the flange head 210 moves toward the end of the pipe, the guide portion 211 makes smooth contact with the inner wall of the pipe through the chamfered portion 214. The beveled or arc structure of the chamfered portion 214 allows the guide portion 211 to gradually enter the pipe, preventing the edge of the guide portion 211 from directly impacting the inner wall of the pipe. The chamfered portion 214 can guide the material at the end of the pipe to expand outward evenly, reducing the shear stress on the intermediate layer of the steel wire resin mesh, thereby preventing the steel wire layer from breaking or twisting.

[0054] In some embodiments, the shaping portion 213 is provided with a connecting portion 215 for connecting to the outside world on the side away from the arc transition portion 212. The connecting portion 215 can be detachably connected to the drive structure, thereby facilitating the maintenance and upkeep of the flange assembly 200 as a whole.

[0055] In practical implementation, the shaping part 213 refers to the structure that ultimately shapes the pipe flange through a specific shape. Specifically, it can be achieved by processing metal materials into a stepped structure. Its function is to ensure the stability and dimensional consistency of the flange shape. The connecting part 215 is an interface for mechanical connection with external driving equipment or fixing devices. Specifically, it can be achieved using threads, snap-fit, or flange structures. Its function is to provide a stable power transmission path and prevent the shaping part 213 from shifting due to uneven force during the flange process.

[0056] During the pipe end flanging process, the connecting part 215 cooperates with the horizontal drive unit 230 or the fixed bracket. When the flanging head 210 is inserted into the pipe end, the shaping part 213 receives external driving force through the connecting part 215, causing the flanging head 210 to advance axially. At this time, the pipe end is guided and positioned by the guide part 211, bent and shaped by the arc transition part 212, and finally forms a flanging structure that meets the requirements under the action of the shaping part 213. The presence of the connecting part 215 allows the flanging head 210 to be quickly separated from the drive unit, facilitating the replacement of different specifications of the shaping part 213 or maintenance operations.

[0057] In traditional flanging devices, the flanging head 210 and the drive unit are usually fixedly connected, which makes equipment adjustment difficult and cannot adapt to various processing requirements. This solution, by adding a standardized connecting part 215, not only ensures the reliability of power transmission during the flanging process, but also realizes modular quick-change function, significantly improving processing efficiency and equipment adaptability.

[0058] In some embodiments, the flanging assembly 200 further includes a horizontal drive unit 230, which is detachably connected to the connecting part 215. The horizontal drive unit 230 can be connected to the flanging head 210 through the connecting part 215. The horizontal drive unit 230 can provide flanging driving power to the flanging head 210, and improve the flanging quality by effectively controlling the feed stroke and feed force.

[0059] The horizontal drive unit 230 is a power device that drives the flange head 210 to move along the pipe axis. Specifically, it can be implemented by a hydraulic cylinder or an electric push rod. Its output end forms a rigid transmission relationship with the connection part 215 of the flange head 210. By precisely controlling the displacement, it ensures that the depth of the flange head 210 inserted into the pipe meets the process requirements.

[0060] After the pipe is fixed by the clamping assembly 100, the horizontal drive unit 230 pushes the flanging head 210 to move along the pipe axis. The guide part 211 first enters the inner cavity of the pipe for centering and positioning, and then the arc transition part 212 contacts the pipe end to perform the first flanging. Since the drive unit and the connecting part 215 adopt a standardized interface, when it is necessary to replace the flanging head 210 of different specifications, the connection can be quickly disconnected and the appropriate drive module can be replaced.

[0061] In some embodiments, the clamping assembly 100 further includes a vertical drive unit 130. The drive end of the vertical drive unit 130 is fixedly connected to the upper mold 110, and the lower mold 120 is fixedly connected to the frame. The position and height remain unchanged. The vertical drive unit 130 can drive the upper mold 110 to move relative to the lower mold 120, thereby causing the upper mold 110 and the lower mold 120 to clamp the pipe and counteract the force applied to the pipe by the horizontal drive unit 230.

[0062] In practical implementation, the vertical drive unit 130 is a mechanical device that achieves vertical displacement through a linear motion mechanism. Specifically, it can be implemented using a hydraulic cylinder, an electric actuator, or a pneumatic actuator. Its output end is rigidly connected to the upper mold 110 to transmit driving force. The cylinder body of the hydraulic cylinder can be fixed to the top crossbeam of the frame, and the end of the piston rod is connected to the upper mold 110 via a flange. When the hydraulic system is started, pressurized oil pushes the piston rod to drive the upper mold 110 to complete the opening and closing action.

[0063] When the pipe is placed within the die hole 140 of the lower die 120, the vertical drive unit 130 pushes the upper die 110 downwards via its drive end, causing the clamping space formed by the upper die 110 and the lower die 120 to gradually shrink. During this process, the outer surface of the pipe is constrained by the die hole 140 of both the upper and lower dies 120, achieving radial fastening through vertical clamping force. Since the lower die 120 remains stationary, the vertical movement trajectory of the upper die 110 is precisely controlled by the vertical drive unit 130, ensuring that the pipe axis remains stable during clamping.

[0064] As a further embodiment, the upper mold 110 and the lower mold 120 are respectively provided with mold holes 140 adapted to the outer diameter of the pipe. The radius of the mold holes 140 is the same as the radius of the pipe. The two oppositely arranged mold holes 140 are combined to form a clamping space for clamping the pipe, which can clamp and fix the pipe from the radial direction.

[0065] In practical implementation, the die hole 140 refers to the through structure set in the upper die 110 and lower die 120 to accommodate the pipe. Specifically, it can be implemented by using a round hole or an irregularly shaped hole that matches the outer contour of the pipe, and its inner wall shape completely fits the outer surface of the pipe. The inner diameter of the die hole 140 maintains a tolerance fit with the outer diameter of the pipe, which can be achieved by using a clearance fit or a transition fit. By controlling the machining accuracy of the die hole 140, a stable contact is formed after the pipe is inserted.

[0066] When the pipe is placed in the clamping space, the upper die 110 and the lower die 120 form a circumferential wrap around the outer wall of the pipe through the die hole 140. The friction generated by the contact between the inner wall of the die hole 140 and the outer surface of the pipe can limit the radial displacement of the pipe. Since the size of the die hole 140 matches the outer diameter of the pipe, the outer wall of the pipe is evenly clamped during the downward pressing process of the upper die 110 driven by the vertical drive unit 130, avoiding local stress concentration that could lead to elliptical deformation of the pipe.

[0067] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A pipe end flange device, wherein the pipe is preheated to a deformable molten state, characterized in that, include: A clamping assembly comprising an upper die and a lower die that are movable relative to each other, wherein a clamping space for radially clamping a pipe is formed between the upper die and the lower die; A flange assembly, comprising a movable flange head, the flange head being coaxially arranged with the pipe and capable of being inserted into the end of the pipe; the flange head being provided, from the outside to the inside, with a guide portion for guiding the movement of the pipe, an arc transition portion for folding the pipe into a flange, and a shaping portion for shaping the flange.

2. The pipe end flange device according to claim 1, characterized in that, The arc transition portion is folded outward at 90° relative to the axial direction of the flange head, so as to fold the end of the pipe into a first flange.

3. The pipe end flange device according to claim 2, characterized in that, The flange assembly also includes a flange sleeve, which is sleeved on the shaping part and detachably connected to the shaping part. The flange sleeve can fold the first flange 90° twice to form a second flange.

4. A pipe end flange device according to claim 2, characterized in that, The shaping part is arranged perpendicular to the axis of the flange head, the shaping part extends radially along the flange head and is integrally connected with the arc transition part, and the projection of the arc transition part relative to the shaping part is located in the shaping part.

5. A pipe end flange device according to claim 1, characterized in that, The cross-sectional shape and size of the guide portion are consistent with the cross-sectional shape and size of the inner cavity of the pipe; the axial length of the guide portion is greater than twice the length of the arc transition portion.

6. A pipe end flange device according to claim 5, characterized in that, The guide section also has a chamfered end near the tube.

7. A pipe end flange device according to claim 1, characterized in that, The shaping part is provided with a connecting part for connecting with the outside world on the side away from the arc transition part.

8. A pipe end flange device according to claim 7, characterized in that, The flange assembly also includes a horizontal drive unit, which is detachably connected to the connecting part.

9. A pipe end flange device according to claim 1, characterized in that, The clamping assembly also includes a vertical drive unit, the drive end of which is fixedly connected to the upper mold, and the lower mold is fixedly connected to the frame. The vertical drive unit can drive the upper mold to move relative to the lower mold.

10. A pipe end flange device according to claim 1, characterized in that, The upper and lower molds are respectively provided with mold holes adapted to the outer diameter of the pipe.

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