Bending forming device for large-bending-radius and large-bending-angle pipe

Abstract

The utility model relates to the field of pipe bending forming, in particular to a large-bending-radius and large-bending-angle pipe bending forming device. The device comprises a bending disc mold, an upper mold cover, a clamp, a limiting mold, a clamp baffle, a holder, a base, a roller conveying table, a motor, a speed reducer, an inner gear, a straight gear, a chain, a chain gear, a fixing shaft, a bearing, a bearing cover, an operation table and the like. One end of a pipe is fixed to a cavity where an inner edge end cover of a bending disc mold is matched with an upper mold cover, a limiting mold is moved to the inner edge end cover of the bending disc mold through a chain, a groove of the limiting mold is tightly attached to the pipe, then the limiting mold is clamped through a clamp on a holder, and a motor is started through an operation table to drive the bending disc mold to rotate and the limiting mold to move; and after reaching the preset position, the pipe is bent into a target part. The pipe bending machine is simple in structure, convenient to operate, high in production efficiency and suitable for pipe bending products with large bending radiuses and large bending angles, and the application range of traditional pipe bending equipment is expanded.

Description

Technical Field

[0001] The utility model relates to the field of pipe bending and forming, in particular to a pipe bending and forming device with a large bending radius and a large bending angle. Background Art

[0002] Large-sized bent pipe parts, such as pipes with large bending radius and large bending angle, are often used in structures in important fields such as nuclear power plants and ships. The research on their forming process methods and equipment is of great significance. At present, the manufacturing method of large-sized bent pipe parts is mainly a combination of sheet metal welding, investment casting, mechanical processing and other technical means. It has many manufacturing processes, high costs and low product qualification rate. In particular, the existing pipe bending equipment is difficult to achieve the bending of pipes with large bending radius due to the limitation of its hydraulically driven gear rack structure; and it is difficult to achieve the bending of pipes with large bending angles due to the limitation of its swing arm structure. Therefore, the utility model proposes a bending forming device for pipes with large bending radius and large bending angle. Utility Model Content

[0003] In view of the above and existing problems, the technical problem to be solved by the present invention is to provide a device for bending and forming pipes with large bending radius and large bending angle, which can realize the bending of pipes with large bending radius and large bending angle.

[0004] The technical solution of this utility model:

[0005] A device for bending pipes with large bending radius and large bending angle, wherein a fixed shaft is mounted on a base, bearings and bearing caps are mounted on both ends of the center hole of the bending die, the fixed shaft passes through the center hole of the bending die and cooperates with the bearing, an internal gear is mounted on the bottom of the bending die, a reducer and a motor output end are mounted on the base, and a spur gear is mounted on the output end of the reducer, the spur gear meshes with the internal gear at the bottom of the bending die, and the reducer drives the bending die to rotate around the fixed shaft through the spur gear and the internal gear in sequence;

[0006] The clamp baffle is fixed on the pan platform, the clamp is installed on the clamp baffle, and the outer side of one end of the limit mold corresponds to the clamping end of the clamp; roller conveyor platforms are installed on both sides of the base, and the limit mold is placed horizontally on the roller conveyor platform. The inner side of the limit mold fits tightly with the pipe through its own groove, and the upper mold cover is installed on the inner edge end cover of the bending disk mold. One end of the pipe is fixed to the cavity where the inner edge end cover of the bending disk mold and the upper mold cover cooperate; one end of the chain is mechanically connected to the top of the limit mold, and the other end of the chain is matched with the chain gear at the output end of the reducer, and the reducer fixed on the roller conveyor platform cooperates with the output end of the motor.

[0007] In the device for bending and forming pipes with large bending radius and large bending angle, the length of the limiting die is greater than or equal to the initial pipe length, and the limiting die moves horizontally to follow the entire process of pipe bending and forming.

[0008] The device for bending and forming pipes with large bending radius and large bending angle has an upper die cover provided with a groove for fixing the initial pipe.

[0009] The device for bending and forming pipes with large bending radius and large bending angle can bend and form pipes with different diameters by changing the diameter of the bending plate die and the shape of the grooves of the inner edge end cover and the upper die cover.

[0010] The large bending radius and large bending angle pipe bending forming device achieves bending of no more than 360 degrees by controlling the rotation angle of the bending plate die.

[0011] The design idea of ​​this utility model is:

[0012] The current pipe bending equipment is difficult to achieve the bending of pipes with large bending radius and large bending angle. The utility model proposes a device and method for bending pipes with large bending radius and large bending angle. While the bending plate mold rotates, the limit mold moves horizontally through the fixture. Under the joint action of the bending plate mold and the limit mold, the pipe is bent along with the bending plate mold. Figure 2-Figure 3 As shown, the upper mold cover 2 is installed on the inner edge end cover 20 of the bending disk mold 1, and one end of the tube 19 is fixed to the cavity where the inner edge end cover 20 of the bending disk mold 1 and the upper mold cover 2 cooperate, and the limiting mold 4 is moved to the inner edge end cover 20 of the bending disk mold 1 through the chain, and the self groove of the limiting mold 4 fits tightly with the tube 19; then the limiting mold 4 is clamped by the clamp 3 on the pan-tilt head at a transverse linear motion speed V1, and the motor is started through the operating table to drive the bending disk mold 1 to rotate at an angular velocity ω, and the limiting mold 4 is moved by the chain at a longitudinal linear motion speed V2. After reaching the predetermined position, the tube 19 is bent into the target part.

[0013] The advantages and beneficial effects of the utility model are:

[0014] 1. The utility model realizes the forming of large bending radius and large bending angle of the pipe.

[0015] 2. The utility model has a simple structure, low cost, high production efficiency and saves materials.

[0016] 3. The device of the utility model can realize the forming of pipes with different diameters by replacing bending disk dies of different specifications, and by designing the cavity shape formed by the inner edge end cover of the bending disk die and the upper die cover, it can realize the bending of pipes with large bending radius and large bending angle with deflection angle.

[0017] 4. The length of the limiting die of the device of the utility model can be conveniently adjusted according to the specifications of the bending plate die to realize the bending of pipes of different diameters, including large bending radius and large bending angle with deflection angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0019] Figure 1 The following are examples of the parts of the initial pipe and the formable bent pipe in the embodiment, where (a) is the initial pipe, (b) is a 360° bend, and (c) is a 180° bend.

[0020] Figure 2-Figure 3 This is a schematic diagram of the principle of the large radius pipe bending forming device of the embodiment. Figure 3 for Figure 2 A-direction view.

[0021] Figure 4 It is the general assembly drawing of the large radius pipe bending forming device of the embodiment.

[0022] In the figure, 1. Bending plate mold; 2. Upper mold cover; 3. Clamp; 4. Limit mold; 5. Clamp baffle; 6. Pan head; 7. Base; 8. Roller conveyor platform; 9. Motor; 10. Reducer; 11. Internal gear; 12. Spur gear; 13. Chain; 14. Chain gear; 15. Fixed shaft; 16. Bearing; 17. Bearing cover; 18. Operating table; 19. Pipe; 20. Inner edge end cover. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions of the embodiments in this application in conjunction with the embodiment drawings in the application specification. Obviously, the embodiments described are only part of the embodiments in this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0024] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Example

[0026] like Figure 1 As shown, the initial pipe can be formed into a bend with a forming angle of 0 to 360°, such as a 360° bend and a 180° bend.

[0027] like Figure 2 、 Figure 3 、 Figure 4 As shown, this embodiment provides a large bending radius and large bending angle pipe bending forming device, including a bending plate die 1, an upper die cover 2, a clamp 3, a limit die 4, a clamp baffle 5, a pan head 6, a base 7, a roller conveyor 8, a motor 9, a reducer 10, an internal gear 11, a spur gear 12, a chain 13, a chain gear 14, a fixed shaft 15, a bearing 16, a bearing cover 17, an operating table 18, etc. The assembly relationship is as follows:

[0028] The fixed shaft 15 is installed in the reserved position on the base 7, and bearings 16 and bearing covers 17 are respectively installed at both ends of the center hole of the bending disk mold 1. The fixed shaft 15 passes through the center hole of the bending disk mold 1 and cooperates with the bearing 16. The internal gear 11 is installed at the bottom of the bending disk mold 1. The reducer and the motor output end are installed on the base 7, and a spur gear 12 is installed at the output end of the reducer. The spur gear 12 is engaged with the internal gear 11 at the bottom of the bending disk mold 1. The reducer drives the bending disk mold 1 to rotate around the fixed shaft 15 through the spur gear 12 and the internal gear 11 in turn.

[0029] The platform 6 is installed at a suitable position on the base 7, the fixture baffle 5 is fixed on the platform 6, the fixture 3 is installed on the fixture baffle 5, and the outer side of one end of the limit mold 4 corresponds to the clamping end of the fixture 3. Roller conveyor platforms 8 are installed on both sides of the base 7, and the limit mold 4 is placed horizontally on the roller conveyor platform 8. The inner side of the limit mold 4 is tightly fitted with the pipe 19 through its own groove. The upper mold cover 2 is installed on the inner edge end cover 20 of the bending plate mold 1. One end of the pipe 19 is fixed to the cavity where the inner edge end cover 20 of the bending plate mold 1 cooperates with the upper mold cover 2; one end of the chain 13 is mechanically connected to the top of the limit mold 4, and the other end of the chain 13 cooperates with the chain gear 14 at the output end of the reducer 10. The reducer 10 fixed on the roller conveyor platform 8 cooperates with the output end of the motor 9, and the entire equipment is controlled by the operating table 18.

[0030] like Figure 2 、 Figure 3 、 Figure 4 As shown, this embodiment provides a method for bending a pipe with a large bending radius and a large bending angle, comprising the following steps:

[0031] S1. Select a suitable bending die 1 according to the target bending part;

[0032] S2. Insert one end of the pipe 19 into the cavity formed by the inner edge end cover 20 of the bending die 1 and the upper die cover 2;

[0033] S3, move one end of the limiting mold 4 to the inner edge end cover 20 of the bending plate mold 1 through the chain 13, adjust the limiting mold 4 to a suitable position, and make the groove of the limiting mold 4 fit tightly with the pipe 19;

[0034] S4, clamping the limiting mold 4 by the clamp 3 on the platform 6;

[0035] S5. The motor is started via the operating console 18, causing the bending die 1 to rotate. Meanwhile, the chain gear 14 and chain 13, via the motor 9, drive the limiting die 4 through the fixture 3 to perform horizontal linear motion. Under the combined action of the bending die 1 and the limiting die 4, the pipe 19 is bent along with the bending die 1 and the upper die cover 2. The horizontal linear motion of the limiting die 4 is synchronized with the rotational motion of the bending die 1 to avoid interference.

[0036] S6. Release the clamp 3 and the upper die cover 2 to obtain the target bent pipe part.

[0037] The implementation results show that the utility model has the advantages of simple structure, easy operation and high production efficiency, and is particularly suitable for pipe bending products with large bending radius and large bending angle, which expands the application range of traditional pipe bending equipment.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A device for bending a pipe with a large bending radius and a large bending angle, characterized in that: The fixed shaft is installed on the base, and bearings and bearing caps are installed at both ends of the center hole of the bending plate mold. The fixed shaft passes through the center hole of the bending plate mold and cooperates with the bearing. An internal gear is installed at the bottom of the bending plate mold. The reducer and the motor output end are installed on the base in cooperation, and a spur gear is installed at the output end of the reducer. The spur gear is meshed with the internal gear at the bottom of the bending plate mold. The reducer drives the bending plate mold to rotate around the fixed shaft through the spur gear and the internal gear in turn. The fixture baffle is fixed on the pan head, the fixture is installed on the fixture baffle, and the outer side of one end of the limit mold corresponds to the clamping end of the fixture; roller conveyor platforms are respectively installed on both sides of the base, and the limit mold is placed horizontally on the roller conveyor platform. The inner side of the limit mold is tightly fitted with the pipe through its own groove, and the upper mold cover is installed on the inner edge end cover of the bending disk mold. One end of the pipe is fixed to the cavity where the inner edge end cover of the bending disk mold and the upper mold cover cooperate; one end of the chain cooperates with the top of the limit mold through mechanical connection, and the other end of the chain cooperates with the chain gear at the output end of the reducer, and the reducer fixed on the roller conveyor platform cooperates with the output end of the motor.

2. The device for bending a pipe with a large bending radius and a large bending angle according to claim 1, characterized in that: The length of the limiting die is greater than or equal to the initial length of the pipe, and the limiting die moves horizontally to follow the entire process of the pipe bending.

3. The device for bending a pipe with a large bending radius and a large bending angle according to claim 1, characterized in that: The upper mold cover is provided with a groove for fixing the initial pipe.

4. The device for bending a pipe with a large bending radius and a large bending angle according to claim 3, characterized in that: By changing the diameter of the bending die and the shape of the inner edge end cover of the bending die and the groove shape of the upper die cover, pipes with different diameters can be bent and formed.

5. The device for bending a pipe with a large bending radius and a large bending angle according to claim 1, characterized in that: By controlling the rotation angle of the bending plate die, a bending of no more than 360 degrees can be achieved.

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