Pipe bending explorator and pipe bending die

Abstract

The utility model provides a pipe bending explorator and a pipe bending die, relates to the technical field of air conditioner machining equipment, and solves the technical problem that the use effect of a pipeline piece is not ideal due to the fact that the bending flattening rate of the pipeline piece is large in the prior art. The pipe bending explorator and the pipe bending die comprise an explorator body, an explorator groove is formed in the explorator body, and a sunken part is arranged at the bottom of the explorator groove, so that when a pipeline piece makes contact with the explorator groove, an isolation gap is formed between the pipeline piece and the sunken part. According to the pipe bending explorator and the pipe bending die, the bending and flattening rate is reduced, and the using effect of a pipeline piece is improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning processing equipment technology, and in particular to a pipe bending template and a pipe bending die. Background Technology

[0002] Most air conditioner components are made of copper pipes bent into various shapes. Currently, these pipe components are processed using pipe molds, which include clamps, round molds, guide molds, and clamping molds. During the bending operation, the pipe component is transferred to the guide mold through the clamps, while the end of the pipe component away from the clamps is fixed to the clamping mold. The bending operation is completed by the movement of the round mold and the clamping mold.

[0003] Currently, the flattening ratio of pipe fittings is e≤1.15 (e=major diameter R1 / minor diameter R2, such as...). Figure 1-3 As shown, the minor diameter R2 is the maximum diameter of the pipe fitting at the bend in the bending plane, and the major diameter R1 is the maximum diameter in the direction perpendicular to the bending plane. Due to the large flattening ratio, the following problems exist:

[0004] 1. Due to the abrupt change in geometry, the bent and flattened parts are prone to stress concentration under fluid pressure. Long-term stress can cause fatigue of the pipe material, reduce the strength of the pipe, and increase the risk of rupture.

[0005] 2. Turbulent fluid flow at bends and flattened sections intensifies erosion of the pipe's inner wall, accelerating wear and shortening its service life. Bends and flattened sections are prone to erosion, leading to wear on the inner wall, reduced corrosion resistance, and potential leaks. Utility Model Content

[0006] The purpose of this invention is to provide a pipe bending template and a pipe bending die to solve the technical problem in the prior art where the large flattening ratio of pipe fittings leads to unsatisfactory performance of the pipe fittings. 。 The various technical effects of the preferred technical solutions among the many technical solutions provided by this utility model are described in detail below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The present invention provides a pipe bending template, including a template body, a template groove on the template body, and a recessed portion at the bottom of the template groove, so that when the pipe component contacts the template groove, there is an isolation gap between the pipe component and the recessed portion.

[0009] Furthermore, the recessed portion is an arc-shaped recess with an arc-shaped cross-section.

[0010] Furthermore, the center lines of the symmetry of the mold groove and the recessed portion coincide.

[0011] Furthermore, the arc angle of the arc-shaped depression is 100-120 degrees.

[0012] Furthermore, the diameter of the template groove is the same as the outer diameter of the pipe fitting, and the arc angle of the template groove is less than 180 degrees.

[0013] Furthermore, the distance between the end face of the template body with the template groove and the center of the template groove is K, where K = 0.3-0.6 mm.

[0014] Furthermore, the edges of the template groove are all provided with chamfers; and / or, at least one end of the template groove is provided with a rounded corner.

[0015] Furthermore, the maximum value of the isolation gap is not less than 0.03 mm, and the maximum value of the isolation gap is not greater than 0.08 mm.

[0016] A pipe bending mold, comprising the pipe bending template as described above.

[0017] Furthermore, it includes a circular mold and a clamping mold. The circular mold is disposed on a first side of the pipe fitting, and the clamping mold and the pipe bending mold are disposed on a second side of the pipe fitting. The second side is disposed opposite to the first side, and the end of the pipe bending mold located on one side of the clamping mold extends beyond the centerline of the circular mold.

[0018] The beneficial effects of this utility model are as follows: The pipe bending template and pipe bending die provided by this utility model include a template body, on which a template groove and a recessed part are provided. When the pipe component contacts the template groove, there is an isolation gap between the pipe component and the recessed part. When it is necessary to bend the pipe component, the template groove on the template body is first brought into contact with the pipe component. During the bending process, due to the isolation gap between the pipe component and the recessed part, the pipe component can move in the direction of the isolation gap, thereby increasing the short diameter dimension. This reduces the flattening ratio of the pipe component after bending, and the change in the pipe flow area is small, which can ensure stable fluid flow and meet the requirements for precise and stable fluid flow in industrial production, avoiding the impact of flow fluctuations on the production process. At the same time, the flattening ratio is small, the fluid flow is smooth, the local resistance and friction resistance are small, and the energy consumption required to transport the same flow rate of fluid is low, which can reduce the energy cost of enterprises.

[0019] Furthermore, by providing a recessed portion at the bottom of the mold groove, an isolation gap is created between the pipe fitting and the recessed portion when the pipe fitting contacts the mold groove. This ensures that the pipe fitting maintains a regular shape after bending, improving its strength, minimizing stress concentration, and keeping the stress on the pipe material within a reasonable range. This reduces the risk of safety accidents such as pipe rupture and leakage due to excessive stress. It also reduces fluid erosion and wear on the inner wall of the pipe, slows down the aging and damage of the pipe material, reduces the frequency of pipe maintenance and replacement, lowers costs, and ensures long-term stable operation of the pipeline system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the pipe component structure after bending using the pipe bending mold of this utility model;

[0022] Figure 2 This is a bottom view of the pipe fitting after bending using the pipe bending mold of this utility model;

[0023] Figure 3 This is a sectional view of the pipe fitting after bending using the pipe bending mold of this utility model (BB).

[0024] Figure 4 This is a structural schematic diagram of the pipe bending mold of this utility model;

[0025] Figure 5 This is a top view of the pipe bending mold of this utility model;

[0026] Figure 6 This is a three-dimensional view of the bending pipe template of this utility model;

[0027] Figure 7 This is a front view of the bending pipe template of this utility model;

[0028] Figure 8 This is a side view of the bending pipe template of this utility model;

[0029] Figure 9 This is a partial structural diagram of the bending pipe template of this utility model;

[0030] Figure 10 This is a partial structural diagram of the bending pipe template of this utility model.

[0031] In the picture:

[0032] 1. Feeding clamp; 2. Pipe bending template; 3. Clamping mold; 4. Pipe fittings; 5. Circular mold;

[0033] 21. Main body of the template; 22. Template groove; 23. Recessed part; 24. Isolation gap. Detailed Implementation

[0034] Please refer to the attached diagram below. Figures 1-10 This document explains the content of this utility model and its differences from existing technologies. The technical solutions (including preferred solutions) of this utility model are further described in detail below through accompanying drawings and examples of optional embodiments. It should be noted that any technical feature or solution in this embodiment is one or more of a variety of optional technical features or solutions. For the sake of brevity, this document cannot exhaustively list all alternative technical features and solutions of this utility model, nor is it convenient to emphasize that each implementation of a technical feature is one of multiple optional implementations. Therefore, those skilled in the art should understand that any technical means provided by this utility model can be replaced, or any two or more technical means or features provided by this utility model can be combined to obtain a new technical solution. No technical feature or solution in this embodiment limits the scope of protection of this utility model. The scope of protection of this utility model should include any alternative technical solutions that can be conceived by those skilled in the art without creative effort, as well as new technical solutions obtained by combining any two or more technical means or features provided by this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do 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. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] This utility model provides a pipe bending template and a pipe bending die for reducing the bending flatness and improving the performance of pipe fittings.

[0038] The following is combined Figures 1-10 The technical solution provided by this utility model will be described in more detail.

[0039] This utility model provides a pipe bending template 2, including a template body 21, a template groove 22 is provided on the template body 21, and a recessed portion 23 is provided at the bottom of the template groove 22, so that when the pipe component 4 contacts the template groove 22, there is an isolation gap 24 between the pipe component 4 and the recessed portion 23.

[0040] The pipe bending mold 2 provided by this utility model includes a mold body 21, on which a mold groove 22 and a recessed portion 23 are provided. When the pipe component 4 contacts the mold groove 22, there is an isolation gap 24 between the pipe component 4 and the recessed portion 23. When it is necessary to bend the pipe component 4, the mold groove 22 on the mold body 21 is first brought into contact with the pipe component 4. During the bending process, due to the isolation gap 24 between the pipe component 4 and the recessed portion 23, the pipe component 4 can move in the direction of the isolation gap 24, thereby increasing the short diameter dimension. This reduces the flattening ratio of the pipe component 4 after bending, and the change in the pipe flow area is small, which can ensure stable fluid flow and meet the requirements for precise and stable fluid flow in industrial production, avoiding the impact of flow fluctuations on the production process. At the same time, the flattening ratio is small, the fluid flow is smooth, the local resistance and friction resistance are small, and the energy consumption required to transport the same flow rate of fluid is low, which can reduce the energy cost of enterprises.

[0041] Furthermore, by providing a recessed portion 23 at the bottom of the template groove 22, an isolation gap 24 exists between the pipe component 4 and the recessed portion 23 when the pipe component 4 contacts the template groove 22. This ensures that the pipe component 4 maintains a regular shape after bending, with minimal stress concentration, and the stress borne by the pipe material remains within a reasonable range, reducing the risk of safety accidents such as pipe rupture and leakage due to excessive stress. It also minimizes the scouring and wear of the pipe's inner wall by fluid, slows down the aging and damage of the pipe material, reduces the frequency of pipe maintenance and replacement, lowers costs, and ensures long-term stable operation of the pipeline system.

[0042] It is understood that the pipe component 4 is clamped between the bending template 2 and the circular template 5. The circular template 5 is provided with a circular template 5 groove. Both the template groove 22 and the circular template 5 groove are adapted to the outer wall of the pipe component 4 to clamp the pipe component 4. The bottom of the template groove 22 is provided with a recessed part 23. The recessed part 23 provides an isolation gap 24 for the pipe component 4 when it is bent, so as to increase the short diameter of the pipe component 4, increase the flow area inside the bending position of the pipe component 4, and ensure stable fluid flow.

[0043] In some embodiments of this utility model, the recessed portion 23 is an arc-shaped recess with an arc-shaped cross-section.

[0044] In some of the embodiments of this utility model described above, the recessed portion 23 is an arc-shaped recess, which can ensure that the pipe diameter at the bending position of the pipe component 4 is more uniform after the pipe component 4 is bent, avoid significant changes in the pipe diameter, and prevent the short diameter of the pipe from expanding slightly outward, thereby ensuring the shape of the pipe component 4 after bending and making the pipe shape regular.

[0045] It is understandable that the template groove 22 is an arc-shaped groove that fits the outer wall of the pipe component 4. The recessed part 23 is located at the bottom of the template groove 22, that is, it is recessed downward from the bottom of the template groove 22 to form the recessed part 23, so that an isolation gap 24 is formed between the pipe component 4 and the recessed part 23. The size of the recessed part 23 can be adjusted according to the size of the pipe component 4 so that the pipe component 4 has a more regular shape after bending.

[0046] In some embodiments of this utility model, the center lines of symmetry of the template groove 22 and the recessed portion 23 coincide.

[0047] In some of the embodiments of this utility model described above, the template groove 22 is adapted to the outer wall of the pipe component 4. The template groove 22 has a left-right symmetrical structure. Preferably, the recessed part 23 is also set to a left-right symmetrical structure, so that the center lines of the symmetry of the template groove 22 and the recessed part 23 coincide, which can better ensure the regularity of the pipe component 4 after bending.

[0048] In some embodiments of this utility model, the arc angle of the arc-shaped recess is 100-120 degrees.

[0049] In some of the embodiments of this utility model described above, since the pipe component 4 needs to contact the template groove 22, the contact area between the template groove 22 and the pipe component 4 needs to ensure the contact effect. Secondly, the arc-shaped groove is used to ensure the bending effect of the pipe component 4. Therefore, taking all factors into consideration, the arc angle of the arc-shaped recess is preferably 100-120 degrees, so as to ensure both the contact effect between the pipe component 4 and the template groove 22 and the bending effect of the pipe component 4 after bending.

[0050] In some embodiments of this utility model, the diameter of the template groove 22 is the same as the outer diameter of the pipe component 4, and the arc angle of the template groove 22 is less than 180 degrees.

[0051] In some of the embodiments of this utility model described above, the diameter of the template groove 22 is the same as the outer diameter of the pipe component 4, which can ensure the contact effect between the template groove 22 and the pipe component 4. Furthermore, the arc angle of the template groove 22 is less than 180 degrees, which can ensure that the pipe component 4 can fully contact the template groove 22 when it is bent, thus avoiding the problem of unsatisfactory contact effect between the pipe component 4 and the template groove 22 due to design tolerance dimensions.

[0052] In some embodiments of this utility model, the distance between the end face of the template body 21 where the template groove 22 is located and the center of the template groove 22 is K, where K = 0.3-0.6 mm.

[0053] In some embodiments of the present invention described above, the end face of the template body 21 with the template groove 22 is the upper end face of the template groove 22. The distance K between the upper end face and the center of the template groove 22 refers to the arc angle of the template groove 22 being less than 180 degrees, and K = 0.3-0.6 mm. This ensures that after the pipe component 4 is placed on the template groove 22, the distance between the center of the pipe component 4 and the end face of the template body 21 is 0.3-0.6 mm, which can effectively guarantee the bending effect.

[0054] It is understandable that K is the difference between the radius of the pipe component 4 and the depth of the mold groove 22 on the mold body 21. That is, when the pipe component 4 is placed in the mold groove 22, the distance between the center line of the pipe component 4 and the end face of the mold groove 22 is K.

[0055] In some embodiments of this utility model, the edges of the template groove 22 are all provided with chamfers; and / or, at least one end of the template groove 22 is provided with rounded corners.

[0056] In some of the embodiments of this utility model described above, by setting a chamfer on the edge of the template groove 22, it is possible to ensure that when the pipe component 4 is bent, it avoids collision or contact with the edge of the template groove 22, thereby ensuring that the pipe component 4 has a better shape after bending.

[0057] Similarly, the mold groove 22 has a rounded corner at at least one end, which can also ensure that the pipe component 4 has a better shape after bending.

[0058] In some embodiments of this utility model, the maximum value of the isolation gap 24 is not less than 0.03 mm, and the maximum value of the isolation gap 24 is not greater than 0.08 mm.

[0059] In some of the embodiments of this utility model described above, when the pipe component 4 contacts the template groove 22, the maximum value of the isolation gap 24 between the pipe component 4 and the recessed portion 23 should be within a reasonable range to avoid irregularity in the shape of the pipe component 4 after bending, to ensure the bending effect, and to ensure that the change in the flow area inside the pipe is within a reasonable range.

[0060] This utility model also provides a pipe bending mold, including the pipe bending template 2 as described above.

[0061] In some embodiments of this utility model, the pipe bending mold includes a circular mold 5 and a clamping mold 3. The circular mold 5 is disposed on the first side of the pipe component 4, and the clamping mold 3 and the pipe bending guide mold 2 are disposed on the second side of the pipe component 4. The second side is disposed opposite to the first side, and the end of the pipe bending guide mold 2 located on one side of the clamping mold 3 extends beyond the center line of the circular mold 5.

[0062] In some embodiments of the present invention described above, the feeding clamp 1 transports the pipe component 4 to a designated position. At this time, the circular mold 5 is located on the first side of the pipe component 4, and the clamping mold 3 and the bending mold 2 are located on the second side of the pipe component 4. When bending the pipe, the bending mold 2 first approaches the pipe component 4, so that the mold groove 22 of the bending mold 2 fits against the outer wall of the pipe component 4. Then, the clamping mold 3 and the circular mold 5 approach each other to clamp the pipe component 4, and the bending of the pipe component 4 is completed while the circular mold 5 rotates. By extending the end of the bending mold 2 located on the side of the clamping mold 3 beyond the center line of the circular mold 5, the errors generated in different equipment and the problem that the bending forming point is not perfectly round due to the rounded corners of the arc surface on the side of the bending mold 2 can be avoided, effectively ensuring the bending quality and improving the bending efficiency.

[0063] It should be noted that the side of the bending die 2 is an arc surface. The rounded corners can solve the problem of damage to the pipe component 4 caused by the collision between the bending die 2 and the pipe component 4. However, it may also cause the bending to be not perfectly round. By extending the end of the bending die 2 located on one side of the clamping die 3 beyond the center line of the circular die 5, space is left on the side of the bending die 2, thereby ensuring the quality of the bending.

[0064] Example 1:

[0065] The bending pipe template 2 provided by this utility model includes a template body 21, on which a template groove 22 is provided. The template groove 22 is a groove with an arc-shaped cross-section. The distance between the end face of the template body 21 where the template groove 22 is provided and the center of the template groove 22 is K, where K = 0.5 mm.

[0066] The bottom of the template groove 22 is provided with a recessed portion 23. The recessed portion 23 is an arc-shaped recess with an arc cross-section. The arc angle of the arc-shaped recess is 110 degrees. The symmetry lines of the template groove 22 and the recessed portion 23 coincide. When the pipe component 4 contacts the template groove 22, there is an isolation gap 24 between the pipe component 4 and the recessed portion 23.

[0067] Furthermore, the edges of the template groove 22 are all chamfered; both ends of the template groove 22 are rounded.

[0068] This utility model also provides a pipe bending mold, including a circular mold 5 and a clamping mold 3. The circular mold 5 is disposed on the first side of the pipe component 4, and the clamping mold 3 and the pipe bending guide mold 2 are disposed on the second side of the pipe component 4. The second side is disposed opposite to the first side, and the end of the pipe bending guide mold 2 located on one side of the clamping mold 3 extends beyond the center line of the circular mold 5.

[0069] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Of course, this invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A pipe bending template, characterized in that, The device includes a template body, on which a template groove is provided, and a recessed portion is provided at the bottom of the template groove, so that when the pipeline component contacts the template groove, there is an isolation gap between the pipeline component and the recessed portion.

2. The pipe bending template according to claim 1, characterized in that, The recessed area is an arc-shaped recess with an arc-shaped cross-section.

3. The pipe bending template according to claim 2, characterized in that, The center lines of the symmetry of the template groove and the recessed portion coincide.

4. The pipe bending template according to claim 2, characterized in that, The arc angle of the concave depression is 100-120 degrees.

5. The pipe bending template according to claim 2, characterized in that, The diameter of the template groove is the same as the outer diameter of the pipe fitting, and the arc angle of the template groove is less than 180 degrees.

6. The pipe bending template according to claim 5, characterized in that, The distance between the end face of the template body with the template groove and the center of the template groove is K, where K = 0.3-0.6 mm.

7. The pipe bending template according to claim 5, characterized in that, The edges of the template groove are all chamfered; and / or, at least one end of the template groove is rounded.

8. The pipe bending template according to claim 2, characterized in that, The maximum value of the isolation gap is not less than 0.03 mm and the maximum value of the isolation gap is not greater than 0.08 mm.

9. A pipe bending mold, characterized in that, Including the pipe bending template as described in any one of claims 1-8.

10. The pipe bending mold according to claim 9, characterized in that, It includes a circular mold and a clamping mold. The circular mold is disposed on the first side of the pipe fitting, and the clamping mold and the pipe bending mold are disposed on the second side of the pipe fitting. The second side is disposed opposite to the first side, and the end of the pipe bending mold located on the clamping mold side extends beyond the center line of the circular mold.

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