A tube local plastic forming apparatus

Abstract

A kind of pipe local plastic forming equipment, including frame, feed drive mechanism, pipe carrying mechanism, fixed clamping mechanism and radial expansion mechanism, feed drive mechanism is arranged on frame;Pipe carrying mechanism is drivingly connected with feed drive mechanism;Fixed clamping mechanism is fixedly arranged on frame, its inside is equipped with the elastic chuck that can be radially expanded, pipe carrying mechanism is threaded fixed clamping mechanism and can slide relative thereto;Radial expansion mechanism is arranged on frame and is located in the movement path front of fixed clamping mechanism;Radial expansion mechanism includes power part and expansion execution part driven by power part and moves;Expansion execution part is configured to interact with the pipe segment by fixed clamping mechanism clamped partial section, make the section occur radial plastic expansion, the utility model realizes the accurate segmented local expansion of pipe by the separation design of fixed clamping mechanism and pipe carrying mechanism, processing precision is high, it is easy to operate, it is suitable for the precision machining needs of small pipe.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, and in particular to a pipe local plastic forming device for local radial expansion of small-sized hollow pipes. Background Technology

[0002] In industries such as precision instruments and medical devices, it is often necessary to precisely expand specific sections of small hollow tubes (such as cylinders with an outer diameter of 5mm and a length of 30-40mm) to meet specific assembly or functional requirements. Currently common expansion techniques, such as pull-down "mushroom head" expanders, typically use a tapered expanding head to pull through the inner cavity of the tube to achieve overall expansion. These traditional techniques have significant limitations: firstly, it is difficult to achieve precise local expansion in non-end positions such as the middle of the tube; secondly, the lack of precise control over the expansion position and range can easily lead to excessive deformation or uneven expansion of the tube; and finally, most existing equipment is designed for large tubes, and its structure and force control are not suitable for the precision machining of small tubes. Utility Model Content

[0003] The purpose of this utility model is to provide a pipe fitting local plastic forming device designed to solve at least one technical problem in the background art.

[0004] To achieve the above objectives, this utility model adopts the following solution: a pipe fitting local plastic forming device, comprising a frame, a feed drive mechanism, a pipe fitting bearing mechanism, a fixed clamping mechanism, and a radial expansion mechanism. The feed drive mechanism is mounted on the frame; the pipe fitting bearing mechanism is drively connected to the feed drive mechanism; the fixed clamping mechanism is fixedly mounted on the frame, and has an internally provided radially expandable elastic clamp; the pipe fitting bearing mechanism passes through the fixed clamping mechanism and can slide relative to it; the radial expansion mechanism is mounted on the frame and located in front of the movement path of the fixed clamping mechanism; the radial expansion mechanism includes a power unit and an expansion actuator driven by the power unit; wherein the expansion actuator is configured to interact with a local section of the pipe fitting held by the fixed clamping mechanism, causing that section to undergo radial plastic expansion.

[0005] The advantages of this utility model are: the separate design of the fixed clamping mechanism and the pipe bearing mechanism realizes the precise segmented local diameter expansion of the pipe, with high processing accuracy and simple operation, which is especially suitable for the precision processing needs of small pipes. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of the pipe fitting local plastic forming equipment according to an embodiment of the present utility model;

[0007] Figure 2This is a schematic diagram of the structure of the pipe fitting local plastic forming equipment according to an embodiment of the present utility model;

[0008] Figure 3 This is a schematic diagram of the pipe support mechanism, fixing clamping mechanism, anti-rotation mechanism and driven wheel of the pipe local plastic forming equipment according to an embodiment of the present utility model;

[0009] Figure 4 This is a schematic diagram of the pipe support mechanism, fixing clamping mechanism, anti-rotation mechanism and driven wheel of the pipe local plastic forming equipment according to an embodiment of the present utility model;

[0010] Figure 5 This is a pipe fitting local plastic forming device according to an embodiment of the present invention. Figure 4 A cross-sectional view of section AA.

[0011] Figure Labels

[0012] 100. Rack;

[0013] 200. Feed drive mechanism; 210. Rotary drive source; 220. Driving pulley; 230. Driven pulley; 240. Drive belt;

[0014] 300. Pipe fitting load-bearing mechanism; 310. Protrusion;

[0015] 400. Fixed clamping mechanism; 410. Elastic chuck; 411. Clamping flap; 420. Mounting plate; 430. Support column; 440. Mounting part;

[0016] 500. Radial expansion mechanism; 510. Power unit; 520. Expansion actuator;

[0017] 600. Anti-rotation mechanism; 610. Guide column. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so as to intuitively and vividly understand each technical feature and overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] In the description of this utility model, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When a feature is referred to as "set," "fixed," or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0020] In the description of this utility model, the term "several" means one or more, and "multiple" means two or more. The terms "greater than," "less than," and "exceeding" should be understood as excluding the stated number. The terms "above," "below," and "within" should be understood as including the stated number. The terms "first" and "second" should be understood as distinguishing technical features and not as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0021] Furthermore, unless otherwise defined, the technical and scientific terms used in this invention have the same meanings as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for the purpose of describing particular embodiments only and not for limiting the invention. It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.

[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] Please see Figures 1 to 5In one embodiment, a pipe fitting local plastic forming device includes a frame 100, a feed drive mechanism 200, a pipe fitting bearing mechanism 300, a fixing clamping mechanism 400, and a radial expansion mechanism 500. A feed drive mechanism 200 is mounted on a frame 100; a fixed clamping mechanism 400 is fixedly mounted on a frame 100, and has a radially expandable elastic chuck 410 inside; a pipe carrying mechanism 300 is connected to the feed drive mechanism 200 and is driven by it to perform reciprocating linear motion relative to the fixed clamping mechanism 400, for carrying and conveying pipes through the elastic chuck 410; a radial expansion mechanism 500 is mounted on a frame 100 and located in front of the movement path of the fixed clamping mechanism 400; the radial expansion mechanism 500 includes a power unit 510 and an expansion actuator 520 driven by the power unit 510; wherein the expansion actuator 520 is configured to interact with a local section of the pipe held by the fixed clamping mechanism 400, causing the section to undergo radial plastic expansion. This basic structure, through the separate design of the fixed clamping mechanism 400 and the movable pipe fitting bearing mechanism 300, achieves precise positioning and selective diameter expansion of any section of the pipe fitting, solving the technical problem that traditional equipment cannot perform local processing on non-end positions of the pipe fitting.

[0024] In one embodiment, the feed drive mechanism 200 includes a rotary drive source 210, a drive wheel 220 driven by the rotary drive source 210, a driven wheel 230, and a transmission component 240 connecting the two. This transmission structure provides stable and reliable power transmission, and its compact structure makes it easy to arrange in a limited space, making it particularly suitable for the precision machining needs of small pipe fittings.

[0025] In one embodiment, the pipe fitting support mechanism 300 and the driven wheel 230 are connected by a helical drive pair. The helical drive converts rotational motion into precise linear motion, enabling micron-level feed control, ensuring accurate positioning of each processing section of the pipe fitting, and greatly improving processing accuracy.

[0026] In one embodiment, the fixed clamping mechanism 400 includes a fixed base, which is fixedly connected to the frame 100, and the elastic chuck 410 is fixed to the fixed base. The fixed base provides a stable mounting foundation for the entire clamping system, effectively absorbs radial forces during processing, prevents equipment vibration, and ensures consistent processing quality.

[0027] In one embodiment, the fixed base includes a mounting plate 420, a support column 430, and a mounting part 440. The support column 430 connects the mounting plate 420 and the frame 100. The mounting part 440 is disposed on the mounting plate 420, and the elastic clamp 410 is fixed to the mounting part 440. This modular design facilitates disassembly and maintenance, while the multi-point support structure enhances the system rigidity and extends the service life of the equipment.

[0028] In one embodiment, the elastic clamp 410 has multiple radially expandable clamping segments 411. The design of multiple clamping segments 411 ensures a uniform distribution of the expansion force, avoids pipe deformation caused by single-point stress concentration, and is particularly suitable for processing thin-walled pipes.

[0029] In one embodiment, the expansion actuator 520 is a push pin, which is configured to insert into the elastic chuck 410 as it moves toward the elastic chuck 410 to force the clamping disc 411 to expand radially. The push pin acts directly on the interior of the clamping disc 411, resulting in a short force flow path and minimal energy loss, enabling rapid and efficient diameter expansion and improving production efficiency.

[0030] In one embodiment, the pipe fitting support mechanism 300 is connected to the driven wheel 230 via a helical transmission pair. To prevent the pipe fitting support mechanism 300 from rotating, an anti-rotation mechanism 600 is also included. The anti-rotation mechanism 600 includes at least one guide post 610 disposed on the mounting portion 440 and at least one protrusion 310 disposed on the pipe fitting support mechanism 300. The guide post 610 and the protrusion 310 are slidably engaged to limit the rotation of the pipe fitting support mechanism 300. The anti-rotation mechanism 600 effectively prevents the pipe fitting support mechanism 300 from circumferentially deviating during helical motion, ensuring the accuracy of linear motion and reducing the wear of transmission components.

[0031] In one embodiment, a control system is also included. The control system is communicatively connected to the feed drive mechanism 200 and the radial expansion mechanism 500, and is used to coordinate the travel position of the pipe fitting carrying mechanism 300 and the timing of the expansion actuator 520. The control system realizes full automation of the processing process. Through program control, processing parameters can be precisely set to ensure product consistency and repeatability, making it particularly suitable for mass production.

[0032] In one embodiment, the control system is configured to cyclically execute the stepping movement of the pipe fitting support mechanism 300 and the diameter-expanding action of the expansion actuator 520. This cyclic processing procedure enables continuous segmented diameter expansion, significantly improving production efficiency while reducing the technical requirements for operators and minimizing human error.

[0033] In one embodiment, the end of the resilient clamp 410 is formed with a guide structure for guiding the insertion of the fitting. The guide structure can automatically correct the insertion position of the fitting, reduce installation time, and improve operational convenience.

[0034] In one embodiment, the outer surface of the clamping flap 411 of the elastic chuck 410 is provided with a textured surface or coating to increase friction. This design significantly enhances the friction between the clamping flap 411 and the inner wall of the pipe, effectively preventing the pipe from slipping or shifting during processing, and further improving processing reliability.

[0035] In one embodiment, the working section of the expansion actuator 520 employs a different taper design. By adjusting the taper angle of the expansion actuator 520, it can adapt to the expansion requirements of pipe fittings with different materials and wall thicknesses, thereby improving the process adaptability and application range of the equipment.

[0036] In one embodiment, the transmission component 240 is replaced by a chain or gear set. This provides the device with different transmission options, allowing users to select the most suitable transmission method based on actual operating conditions, thus enhancing the product's market adaptability.

[0037] In one embodiment, the resilient chuck 410 is fixed to the mounting portion 440 by a separate shaft. The shaft structure provides additional support rigidity to the resilient chuck 410, making it particularly suitable for machining applications with high resistance, further expanding the capabilities of the equipment.

[0038] The above embodiments are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

[0039] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A device for localized plastic forming of pipe fittings, characterized in that, include: frame; A feed drive mechanism is mounted on the frame; A fixed clamping mechanism is fixedly mounted on the frame, and its interior is provided with a radially expandable elastic clamp; The pipe fitting carrying mechanism is connected to the feed drive mechanism and is driven by it to reciprocate linearly relative to the fixed clamping mechanism, for carrying and conveying the pipe fitting through the elastic clamp; A radial expansion mechanism is disposed on the frame and located in front of the movement path of the fixed clamping mechanism. The radial expansion mechanism includes a power unit and an expansion execution unit driven by the power unit. The expansion actuator is configured to interact with a local section of the pipe clamped by the fixing clamping mechanism, causing the section to undergo radial plastic expansion.

2. The pipe fitting local plastic forming equipment as described in claim 1, characterized in that, The feed drive mechanism includes a rotary drive source, a driving wheel driven by the rotary drive source, a driven wheel, and a transmission component connecting the two.

3. The pipe fitting local plastic forming equipment as described in claim 2, characterized in that, The pipe fitting bearing mechanism is connected to the driven wheel via a helical transmission pair.

4. The pipe fitting local plastic forming equipment as described in claim 1, characterized in that, The fixed clamping mechanism includes a fixed base, which is fixedly connected to the frame, and the elastic clamp is fixed on the fixed base.

5. The pipe fitting local plastic forming equipment as described in claim 4, characterized in that, The fixed base includes a mounting plate, a support column, and a mounting part. The support column connects the mounting plate to the frame. The mounting part is disposed on the mounting plate, and the elastic clamp is fixed on the mounting part.

6. The pipe fitting local plastic forming equipment as described in claim 1, characterized in that, The elastic clamp has multiple clamping flaps that can expand radially.

7. The pipe fitting local plastic forming equipment as described in claim 6, characterized in that, The expansion actuator is a pin, which is configured to insert into the elastic clamp when moving toward it to force the clamp flap to expand radially.

8. The pipe fitting local plastic forming equipment as described in claim 5, characterized in that, It also includes an anti-rotation mechanism, which includes at least one guide post disposed on the mounting portion and at least one protrusion disposed on the pipe fitting support mechanism; the guide post and the protrusion are slidably engaged to limit the rotation of the pipe fitting support mechanism.

9. The pipe fitting local plastic forming equipment as described in claim 1, characterized in that, It also includes a control system, which is communicatively connected to the feed drive mechanism and the radial expansion mechanism, and is used to coordinate the travel position of the pipe support mechanism and the action timing of the expansion actuator.

10. The pipe fitting local plastic forming equipment as described in claim 9, characterized in that, The control system is configured to cyclically execute the stepping movement of the pipe fitting bearing mechanism and the diameter expansion action of the expansion actuator.

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