Large bent pipe bending clamp

Abstract

The utility model discloses a large bent pipe bending clamp which comprises a die handle and a first wire winding plate fixed on the die handle, the die handle is connected with a machine table to provide rotating power, a first arc-shaped groove is machined in the outer circle outline of the first wire winding plate, the first wire winding plate is fixed in a cylinder on a second wire winding plate, and a second arc-shaped groove is machined in the outer circle outline of the second wire winding plate. A sixth arc-shaped groove is machined in the outer circle outline of the cylinder, a connecting plate is fixed to the first winding plate, a first pressing plate is arranged on the connecting plate, a first bent hole is formed between the first pressing plate and the first arc-shaped groove in the first winding plate, a second pressing plate is fixed to the first pressing plate, and a second bent hole is formed between the first pressing plate and the second pressing plate. The second pressing plate is connected with the third pressing plate, and a third bent hole is formed between the second pressing plate and the third pressing plate. The end of a to-be-machined pipe fitting is clamped through the first bent hole, then bent along the first arc-shaped groove, bent by a circle through the second bent hole to the sixth arc-shaped groove and then clamped through the third bent hole. The device is simple and ingenious in structural design, and the requirement for small-batch semi-automatic machining and forming of large-diameter spiral bent pipes is met.

Description

Technical Field

[0001] The utility model relates to the technical field of improved design of pipe bending forming devices, in particular to a large-scale pipe bending clamp. Background Art

[0002] The pipe is bent to form a curved pipe. Generally, one end of the pipe is fixed by a clamp, and then the pipe is bent around the arc groove on the clamp as the clamp rotates. This method is generally used for single-turn bending or spiral bending. However, for multi-turn disc bending of large-diameter spiral bends, conventional bending clamps often cannot meet the processing requirements.

[0003] In the prior art, the patent with announcement number CN220028308U discloses a large bending radius conduit rolling tool, which belongs to the field of conduit manufacturing technology, and aims to provide a large bending radius conduit rolling tool to solve the problems of poor forming quality, difficult control and poor economy of existing large bending radius conduits. It includes a rolling pressure die, a rolling bending die, and a rolling clamping die arranged on a pipe bender, and the rolling pressure die, the rolling bending die, and the rolling clamping die are arranged in sequence along the conduit conveying direction of the pipe bender, and the rolling pressure die and the rolling bending die are respectively located on both sides of the conduit conveying channel of the pipe bender, and the rolling pressure die and the rolling clamping die are located on the same side of the conduit conveying channel of the pipe bender. The utility model is suitable for a large bending radius conduit rolling tool.

[0004] The patent with the announcement number CN208866198U discloses a CNC pipe bending tool, which includes a tool wheel for being coaxially fixedly connected with the mounting turntable, and also includes a guide block for limiting the guide tube to be bent and a pressing block used in conjunction with the tool wheel to press the guide tube to be bent on the tool wheel, the tool wheel, the pressing block and the guide block are all provided with arc grooves for placing the guide tube to be bent and corresponding to each other in position, the tool wheel is provided with a transfer flange, and the transfer flange is provided with a fastening connection structure for fastening the tool wheel to the mounting turntable. The CNC pipe bending tool of the utility model directly transmits torque to the tool wheel by the mounting turntable, freeing up the center axis space on the tool wheel in the prior art, and on the CNC pipe bending tool without a center axis or with a thinner center axis, the tool wheel is conveniently arranged with an arc groove with a smaller bending radius adapted to the bending of a smaller-sized guide tube, and the margin at the location of the arc groove is greatly increased, reducing the possibility of deformation of the tool wheel during bending.

[0005] In the above technical solution, there is a situation where the tooling structure design is relatively complex, which is suitable for mass production. For large spiral bending tubes with a maximum diameter of 404 mm in small-batch semi-automatic usage scenarios, the manufacturing cost is relatively high.

[0006] In order to solve one of the above problems, the present application provides a large pipe bending fixture. Summary of the Utility Model

[0007] The purpose of the present utility model is to solve the problems existing in the prior art, and a large pipe bending fixture is proposed. Its structural design is simple and ingenious, meeting the requirements of small-batch semi-automatic processing and forming of large-diameter spiral bent pipes.

[0008] To achieve the above purpose, the present utility model adopts the following technical scheme: A large pipe bending fixture includes a die shank and a first wire winding plate fixed on the die shank. The die shank is connected to the machine table to provide the rotational power for the bending and forming of the pipe to be processed. A first arc-shaped groove is machined on the outer circular contour of the first wire winding plate for forming the first circle of bent pipe of the pipe to be processed. The first wire winding plate is fixed inside a cylinder on the second wire winding plate, and a sixth arc-shaped groove is machined on the outer circular contour of the cylinder for forming the second circle of bent pipe of the pipe to be processed. A connecting plate is fixed on the first wire winding plate, and a first pressing plate is arranged on the connecting plate. A first bending hole is formed between the first pressing plate and the first arc-shaped groove on the first wire winding plate. A second pressing plate is fixed on the first pressing plate and a second bending hole is formed between them. The second pressing plate is connected to a third pressing plate and a third bending hole is formed between them. The end of the pipe to be processed is clamped through the first bending hole, bent along the first arc-shaped groove, then passes through the second bending hole to the sixth arc-shaped groove and bends around for one week and is clamped by the third bending hole.

[0009] Further, the two ends of the second bending hole as described above are respectively matched with the ends of the first arc-shaped groove and the second arc-shaped groove for connecting the first circle of bent pipe and the second circle of bent pipe.

[0010] Further, an installation opening is machined on the second wire winding plate as described above. The connecting plate, the first pressing plate and the second pressing plate are all located inside the installation opening, so as to leave enough installation space for the connecting plate and the pressing plates when the first wire winding plate is fixed to the second wire winding plate.

[0011] Further, a first groove is machined at the bottom of the first pressing plate as described above. The top of the first pressing plate is processed into an arc-shaped surface and a second arc-shaped groove is opened.

[0012] Further, two connecting plates are provided as described above and are symmetrically arranged on both sides of the first wire winding plate. The first arc-shaped groove between the two connecting plates and the arc-shaped groove at the bottom of the first groove form the first bending hole.

[0013] Further, the bottom of the second pressing plate is matched with the top of the first pressing plate and a third arc-shaped groove is machined. The third arc-shaped groove and the second arc-shaped groove form the second bending hole.

[0014] Further, the top of the second pressing plate is processed into an arc-shaped surface and a fourth arc-shaped groove is opened. The bottom of the third pressing plate is matched with the top of the second pressing plate and a fifth arc-shaped groove is machined. The fifth arc-shaped groove and the fourth arc-shaped groove form the third bending hole.

[0015] Further, one end of the third bent hole as described above is fitted with one end of the second arc-shaped groove, and the third bent hole and the end of the pipe fitting to be processed are in interference fit, which is convenient for clamping and fixing.

[0016] Further, the first bent hole as described above and the end of the pipe fitting to be processed are in interference fit, which is convenient for clamping and fixing. There is a clearance fit or a transition fit between the second bent hole and the pipe fitting to be processed, and the second bent hole is used as a transition part.

[0017] Further, a clamping plate is also provided on the connecting plate as described above. The first pressing plate is processed with a clamping plate that fits with the clamping groove, which plays a role in limiting the position during assembly; the first wire winding plate is a first circular plate member, and the second wire winding plate includes a second circular plate member and a cylinder. The first circular plate member is placed in the cavity of the cylinder and is connected to the second circular plate member.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: The structure design of this device is simple and ingenious, meeting the requirements for small-batch semi-automatic processing and forming of large-diameter spiral bent pipes.

[0019] During the bending process of the pipe fitting to be processed, the first wire winding plate is placed in the cylinder of the second wire winding plate and fixes the connecting plate and multiple pressing plates. First, one end of the pipe fitting to be processed is fixed on the outer contour of the first wire winding plate and is bent along its own arc-shaped groove and then passes through the second bent pipe. Then, the pipe fitting to be processed is continuously bent along the arc-shaped groove on the outer contour of the cylinder. Finally, it is clamped and fixed by the third bent pipe to form a finished product. By sequentially disassembling each pressing plate and wire winding plate, the finished bent pipe can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional view of the present utility model;

[0021] Figure 2 is Figure 1 an exploded view of

[0022] Figure 3 is a schematic exploded view of the connecting plate and the pressing plate of the present utility model;

[0023] Figure 4 is Figure 1 a top view of

[0024] Figure 5 is a three-dimensional view of the present utility model with the finished bent pipe removed.

[0025] In the figure: 1. Die handle; 2. First wire winding board; 21. First arc-shaped groove; 3. Connecting plate; 30. Clamping plate; 4. First pressing plate; 40. Card slot; 41. First groove; 42. Second arc-shaped groove; 5. Second pressing plate; 51. Third arc-shaped groove; 52. Fourth arc-shaped groove; 6. Third pressing plate; 61. Fifth arc-shaped groove; 7. Second wire winding board; 70. Installation opening; 71. Sixth arc-shaped groove; 8. Finished bent pipe. Detailed implementation mode

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, 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 therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "fixed", "installed", "connected", "set", etc. should be understood in a broad sense. For example, when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "installed on" another element, it can be directly installed on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements.

[0028] For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1

[0031] Refer to Figures 1-5As shown in the figure, a large pipe bending fixture of the present utility model includes a die shank 1 and a first wire winding plate 2 fixed on the die shank 1. The die shank 1 is arranged at the center of the first wire winding plate 2 and is connected to a machine table to provide the rotational power for the bending and forming of the pipe to be processed. The machine table is a bending lathe or other machine capable of providing rotational power. A first arc-shaped groove 21 is machined on the outer circular contour of the first wire winding plate 2 for forming the first loop of the pipe to be processed. In addition, the first wire winding plate 2 is fixed inside a cylinder on a second wire winding plate 7, and a sixth arc-shaped groove 71 is machined on the outer circular contour of the cylinder for forming the second loop of the pipe to be processed. A connecting plate 3 is fixed on the first wire winding plate 2, and a first pressing plate 4 is arranged on the connecting plate 3. A first bending hole is formed between the first pressing plate 4 and the first arc-shaped groove 21 on the first wire winding plate 2 for clamping and fixing the initial end of the pipe to be processed. A second pressing plate 5 is fixed on the first pressing plate 4, and a second bending hole is formed between them for connecting the first loop of the pipe and the second loop of the pipe. The second pressing plate 5 is connected to a third pressing plate 6, and a third bending hole is formed between them for clamping and fixing the end of the second loop of the pipe. After the end of the pipe to be processed is clamped through the first bending hole, it is bent along the first arc-shaped groove 21, then passes through the second bending hole to the sixth arc-shaped groove 71 and bends around for one week and is then clamped by the third bending hole.

[0032] Embodiment 2

[0033] Referring to Figures 1-5 As shown in the figure, on the basis of the technical solution of Embodiment 1, a large pipe bending fixture, combined with Figure 1 and Figure 2 it can be known that the two ends of the second bending hole are respectively matched with the ends of the first arc-shaped groove 21 and the second arc-shaped groove 42. The second bending hole serves as a transition component to connect and penetrate the first loop of the pipe and the second loop of the pipe. In addition, an installation opening 70 is machined on the second wire winding plate 7. The connecting plate 3, the first pressing plate 4, and the second pressing plate 5 are all located inside the installation opening 70. The function of the installation opening 70 is to provide an installation space for the connecting plate 3 and the pressing plates fixed on the first wire winding plate 2 when they cooperate with the second wire winding plate 7, so that there will be no situation where assembly cannot be carried out when the first wire winding plate 2 and the second wire winding plate 7 are fixed.

[0034] Further, a first groove 41 is machined at the bottom of the first pressing plate 4, and the top of the first pressing plate 4 is machined into an arc surface and provided with a second arc groove 42. In addition, two connecting plates 3 are provided and symmetrically arranged on both sides of the first wire winding plate 2. The first arc groove 21 between the two connecting plates 3 and the arc groove at the bottom of the first groove 41 form a first bent hole. The bottom of the second pressing plate 5 cooperates with the top of the first pressing plate 4 and is machined with a third arc groove 51. The third arc groove 51 and the second arc groove 42 form a second bent hole. The top of the second pressing plate 5 is machined into an arc surface and provided with a fourth arc groove 52. The bottom of the third pressing plate 6 cooperates with the top of the second pressing plate 5 and is machined with a fifth arc groove 61. The fifth arc groove 61 and the fourth arc groove 52 form a third bent hole.

[0035] During the use of the fixture of the present application, attention needs to be paid to the installation and assembly sequence of each component. First is the fixed connection between the die handle 1 and the first wire winding plate 2 and the fastening connection between the first wire winding plate 2 and the connecting plate 3. Then, the die handle 1 is installed on the bending lathe. Next, the initial end of the pipe to be processed is placed in the first arc groove 21 between the two connecting plates 3. Then, the first pressing plate 4 and the connecting plate 3 are aligned and fastened to clamp the initial end of the pipe to be processed. At this time, the bending lathe is started to bend one week, so that the pipe to be processed is formed along the first arc groove 21 to obtain the first circle of bent pipe. The end of the first circle of bent pipe is located on the second arc groove 42 of the first pressing plate 4. Then, the bending lathe stops rotating. The third pressing plate 6 is fixedly connected to the second pressing plate 5, so that the end of the first circle of bent pipe is in the second bent pipe. Then, the second wire winding plate 7 is fixedly connected to the first wire winding plate 2, and the connecting block and each pressing plate are in the installation port 70. The bending lathe is started again to perform a bending operation for one week, so that the pipe to be processed is formed along the sixth arc groove 71 to obtain the second circle of bent pipe. The end of the second circle of bent pipe is located on the fourth arc groove 52 of the second pressing plate 5. Then, the bending lathe stops rotating. The third pressing plate 6 is fixedly connected to the second pressing plate 5, so that the end of the second circle of bent pipe is clamped by the third bent pipe. The redundant part outside the second circle of bent pipe is cut off. Then, each pressing plate and the second wire winding plate 7 are disassembled in sequence, and the final bent pipe finished product 8 is taken out. The bent pipe finished product 8 is as Figure 2 shown. The first circle of bent pipe is placed in the plane of the second circle of bent pipe and is generally spiral. Later, the corresponding bending transition pipes are welded to both ends of the bent pipe finished product 8 respectively, and are supported by the double-groove pads here. The welding operation is not elaborated here.

[0036] Embodiment 3

[0037] Referring to Figures 1-5 shown, on the basis of the technical solution of Embodiment 2, a large-scale pipe bending fixture, in combination with Figure 1 and Figure 2It can be seen that one end of the third bent hole is matched with one end of the second arc-shaped groove 42. The third bent hole and the end of the pipe fitting to be processed are in interference fit, so that the third bent hole has the function of clamping and fixing the end of the second loop of bent pipe. In addition, the first bent hole and the end of the pipe fitting to be processed are in interference fit, so that the first bent hole has the function of clamping and fixing the initial end of the first loop of bent pipe. A clearance fit or a transition fit is provided between the second bent hole and the pipe fitting to be processed. The function of the second bent hole is to play a transitional role. The end of the first loop of bent pipe is bent into the second loop of bent pipe after passing through the second bent hole.

[0038] Furthermore, a clamping plate 30 is further provided on the connecting plate 3. A clamping plate 30 that is matched with the clamping groove 40 is processed on the first pressing plate 4, which plays a role in assembly limit. In addition, the side part of the connecting plate 3 is screwed to connect the first wire winding plate 2. The first pressing plate 4 is provided with holes and screwed to fasten the connecting plate 3. The second pressing plate 5 is provided with holes and screwed to connect the first pressing plate 4. The third pressing hole is provided with holes and screwed to be fixed on the second pressing plate 5. The first wire winding plate 2 is a first circular plate member. The second wire winding plate 7 includes a second circular plate member and a cylinder. The cylinder is fixed on the second circular plate member. The first circular plate member is placed in the cavity of the cylinder and connected to the second circular plate member. The second circular plate member is processed with through holes. The first circular plate member is processed with screw holes and provided with bolts. After the screw holes and the through holes on the two circular plate members are aligned, they are fastened with nuts.

[0039] In the device of the present utility model, the assembly and mating relationships of the various components involved, the dimensional processing parameters of the arc-shaped grooves, the screw connection method, the machine start-stop control method, etc. are prior arts or materials. Those skilled in the art can directly purchase or customize them from the market according to the required product models and specifications.

[0040] The electrical components mentioned in the text are all electrically connected to the external main controller and 220V mains or industrial electricity, and the main controller can be a conventional known device such as a computer that plays a control role.

[0041] The above are only the preferred specific embodiments of the present utility model. The well-known specific structures and characteristics and other common knowledge in the solution are not described in detail here. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. Any person skilled in the technical field of the present utility model, within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A large-scale pipe bending fixture, comprising a die handle (1) and a first winding plate (2) fixed on the die handle (1), wherein the die handle (1) is connected to a machine table to provide a rotational power for bending the pipe to be processed, and a first arc groove (21) is processed on the outer circular contour of the first winding plate (2), characterized in that: The first winding plate (2) is fixed in a cylinder on the second winding plate (7), and a sixth arc groove (71) is processed on the outer circular contour of the cylinder. A connecting plate (3) is fixed on the first winding plate (2), and a first pressing plate (4) is provided on the connecting plate (3). A first curved hole is formed between the first pressing plate (4) and the first arc groove (21) on the first winding plate (2). A second pressing plate (5) is fixed on the first pressing plate (4) and a second curved hole is formed between the two. The second pressing plate (5) is connected to the third pressing plate (6) and a third curved hole is formed between the two. The end of the pipe to be processed is clamped by the first curved hole, bent along the first arc groove (21), and then bent through the second curved hole to the sixth arc groove (71), and then clamped by the third curved hole.

2. A large pipe bending fixture according to claim 1, characterized in that: The two ends of the second curved hole respectively match the end portions of the first arc-shaped groove (21) and the second arc-shaped groove (42).

3. A large pipe bending fixture according to claim 2, characterized in that: The second winding plate (7) is processed with a mounting opening (70), and the connecting plate (3), the first pressing plate (4) and the second pressing plate (5) are all located in the mounting opening (70).

4. A large pipe bending fixture according to claim 3, characterized in that: The bottom of the first pressing plate (4) is processed with a first groove (41), and the top of the first pressing plate (4) is processed into an arc-shaped surface and is provided with a second arc-shaped groove (42).

5. A large pipe bending fixture according to claim 4, characterized in that: The connecting plates (3) are provided with two and are symmetrically arranged on both sides of the first winding plate (2), and the first arc groove (21) located between the two connecting plates (3) and the arc groove at the bottom of the first groove (41) form a first curved hole.

6. A large pipe bending fixture according to claim 5, characterized in that: The bottom of the second pressing plate (5) matches the top of the first pressing plate (4) and is processed with a third arc-shaped groove (51), and the third arc-shaped groove (51) and the second arc-shaped groove (42) form a second curved hole.

7. A large pipe bending fixture according to claim 6, characterized in that: The top of the second pressing plate (5) is processed into an arc-shaped surface and is provided with a fourth arc-shaped groove (52). The bottom of the third pressing plate (6) matches the top of the second pressing plate (5) and is processed with a fifth arc-shaped groove (61). The fifth arc-shaped groove (61) and the fourth arc-shaped groove (52) form a third curved hole.

8. A large pipe bending fixture according to claim 7, characterized in that: One end of the third curved hole matches one end of the second arc-shaped groove (42), and the third curved hole and the end of the pipe to be processed are interference fit.

9. A large pipe bending fixture according to claim 8, characterized in that: The first curved hole and the end of the pipe to be processed are in interference fit, and the second curved hole and the pipe to be processed are in clearance fit or transition fit.

10. A large pipe bending fixture according to claim 9, characterized in that: The connecting plate (3) is also provided with a clamping plate (30), and the first pressing plate (4) is processed with a clamping plate (30) that matches the clamping groove (40); the first winding plate (2) is a first circular plate member, and the second winding plate (7) includes a second circular plate member and a cylinder, and the first circular plate member is placed in the cavity of the cylinder and connected to the second circular plate member.

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