Pipe bending mechanism

Abstract

The invention discloses a pipe bending mechanism which comprises a base, a frame is arranged above the base, a mounting shaft is arranged in the frame and connected with a driving structure, a bending die is arranged on the mounting shaft, a clamping die is arranged below the bending die, and the pipe bending mechanism is high in universality and bending precision and reliable in pipe forming quality.

Description

Technical Field

[0001] The invention belongs to the field of pipe bending machines, and in particular relates to a pipe bending mechanism. Background Art

[0002] The current pipe bending machines are usually composed of a fixed bending die and a rotatable clamping die. They cannot bend pipes continuously, nor can they produce pipes with different bending shapes. They have a simple structure and low positioning accuracy. In the bending process, defects such as flattening of the arc, bending cracks, and bending rebound are prone to occur, which affects the quality of the bent pipes.

[0003] The utility model patent with publication number CN 212884291U was published on April 6, 2021. It is named as a double-head CNC pipe bending machine for metal pipe bending, which includes a bottom plate, a pipe placing table fixedly connected to the top of the bottom plate, and the pipe placing table includes four supporting legs and a top plate. Two arc-shaped blind holes are symmetrically opened on the top surface of the top plate, a sliding groove is opened at the center of the top surface of the top plate, a rectangular groove is fixedly connected at the center of the top surface of the bottom plate, and a pipe bending mechanism is slidably connected to the top surface of the bottom plate. This double-head CNC pipe bending machine for metal pipe bending cannot solve the technical problems recorded above. Summary of the invention

[0004] The purpose of the present invention is to provide a pipe bending mechanism with high versatility, high bending precision and reliable pipe forming quality in view of the deficiencies in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The pipe bending mechanism comprises a base, a frame is arranged above the base, a mounting shaft is arranged inside the frame, the mounting shaft is connected with a driving structure, a bending die is arranged on the mounting shaft, and a clamping die is arranged below the bending die.

[0007] The driving structure includes a first motor and a second motor. One end of the installation shaft extends out of the frame. The installation shaft includes an inner shaft and an outer shaft. The first motor and the outer shaft are connected with a chain transmission structure. A connecting bracket is fixedly connected to the outer shaft, and the clamping mold is fixedly connected to the connecting bracket. Both ends of the inner shaft extend out from the outer shaft, the bending mold is fixedly connected to one end of the inner shaft, and the second motor and the inner shaft are connected with a synchronous belt transmission structure.

[0008] A mounting plate is provided outside the frame, and a first cylinder and a second cylinder are provided on the mounting plate. The first cylinder is connected to the clamping die, and the second cylinder is connected to a supporting wheel. A clamping wheel is provided on the clamping die, and the clamping wheel and the supporting wheel are at the same height; a pipe bending wheel is provided on the bending die, and the clamping wheel and the supporting wheel are located below the pipe bending wheel.

[0009] The clamping die includes a first clamping die and a second clamping die, the first clamping die is provided with a first clamping groove, the second clamping die is provided with a second clamping groove, and the second clamping groove is higher than the first clamping groove; the bending die includes a first bending die and a second bending die, the first bending die and the second bending die are coaxially arranged, and the radius of the first bending die is greater than the radius of the second bending die.

[0010] A clamping block is provided between the first clamping mold and the second clamping mold, a first clamping slot is provided at the bottom of the first clamping mold, and the first clamping slot is in a conical structure, a second clamping slot is provided at the top of the second clamping mold, and the second clamping slot is in a square structure, and both ends of the clamping block are respectively clamped with the first clamping slot and the second clamping slot.

[0011] It also includes a machine platform, which is provided with a first guide rail and a rack, and a third motor is provided on the base. The first motor is connected to a gear, and the gear is meshed with the rack. A first slider is provided at the bottom of the base, and the first slider cooperates with the first guide rail.

[0012] A support is provided on the base, the frame is fixedly connected to the support, a second slider is provided at the bottom of the support, a second guide rail is provided on the base, the second slider cooperates with the second guide rail, and a screw transmission motor is provided at one end of the base.

[0013] A transmission key is arranged on the inner shaft, and a bearing is arranged at the end of the inner shaft.

[0014] The first sliding block, the first guide rail, the second sliding block and the second guide rail are all arranged in pairs.

[0015] The technical effects of the present invention are as follows: by adopting the bending mechanism of the present invention, the mold can be moved in a plane through the lateral movement of the base and the longitudinal movement of the support, so as to realize the change of the bending position of the pipe fitting and the switching of the mold. The pipe fitting can be bent continuously, which is conducive to the one-time forming of the pipe fitting and improves the production efficiency; the installation shaft adopts the form of inner and outer shafts, which has a compact structure and high position accuracy. The pipe fitting is clamped by the bending mold and the clamping mold through the cylinder, which ensures the bending accuracy of the pipe fitting by the rotation of the clamping mold and ensures the forming quality of the pipe fitting; the bending mold and the clamping mold are easy to disassemble, which is convenient for maintenance and replacement of other types of molds, and improves the versatility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] This specification includes the following drawings, which show the following contents:

[0017] Figure 1 It is a structural schematic diagram of the pipe bending mechanism of the present invention;

[0018] Figure 2 It is a schematic diagram of the local structure of the pipe bending mechanism of the present invention;

[0019] Figure 3 yes Figure 2 Rear view of

[0020] Figure 4 It is a structural schematic diagram of the guide assembly on the machine platform of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the installation shaft of the present invention;

[0022] Figure 6-1 and Figure 6-2 It is a structural schematic diagram of the clamping die of the present invention;

[0023] Figure 7 It is a structural schematic diagram of the bending die of the present invention.

[0024] The following are marked in the figure: 1. base; 2. support; 3. frame; 4. mounting shaft; 5. bending die; 6. clamping die; 7. inner shaft; 8. outer shaft; 9. connecting bracket; 10. machine table; 11. first motor; 12. second motor; 13. third motor; 14. chain drive structure; 15. synchronous belt drive structure; 16. mounting plate; 17. first cylinder; 18. second cylinder; 19. bending wheel; 20. clamping wheel; 21. support Support wheel; 22, first clamping die; 23, second clamping die; 24, clamping block; 25, first clamping groove; 26, second clamping groove; 27, first bending die; 28, second bending die; 29, gear; 30, rack; 31, first slider; 32, first guide rail; 33, second slider; 34, second guide rail; 35, transmission key; 36, bearing; 37, keyway; 38, screw drive motor; 39, first clamping groove; 40, second clamping groove. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0026] like Figures 1 to 3 As shown, the pipe bending mechanism includes a base 1, a frame 3 is provided above the base 1, a mounting shaft 4 is provided inside the frame 3, the mounting shaft 4 is connected to a driving structure, a bending die 5 is provided on the mounting shaft 4, and a clamping die 6 is provided below the bending die 5. The rotation of the clamping die 6 is realized by the rotation of the mounting shaft 4, and the motor outputs power to drive the mounting shaft 4 to rotate. After the pipe is clamped by the bending die 5 and the clamping die 6, it is bent and formed between the bending groove and the clamping groove through the rotation process of the clamping die 6.

[0027] like Figures 1 to 3As shown, the driving structure includes a first motor 11 and a second motor 12, one end of the mounting shaft 4 extends out of the frame 3, the mounting shaft 4 includes an inner shaft 7 and an outer shaft 8, the first motor 11 and the outer shaft 8 are connected with a chain transmission structure 14, a connecting bracket 9 is fixedly connected to the outer shaft 8, and the clamping mold 6 is fixedly connected to the connecting bracket 9; both ends of the inner shaft 7 extend out from the outer shaft 8, the bending mold 5 is fixedly connected to one end of the inner shaft 7, and the second motor 12 and the inner shaft 7 are connected with a synchronous belt transmission structure 15. The mounting shaft 4 adopts an inner and outer shaft 8 structure. The movement processes of the bending die 5 and the clamping die 6 are independent of each other and there is no interference in space. At the same time, the mold installation space is saved and the equipment manufacturing cost is reduced; the chain transmission structure 14 includes a pair of master and slave sprockets and a chain meshing therewith. The first motor 11 outputs power to drive the outer shaft 8 to rotate through the chain transmission structure 14, so that the clamping die 6 rotates with the connecting bracket 9, thereby completing the bending action of the clamping die 6; the synchronous belt transmission structure 15 includes a pair of master and slave synchronous wheels and a synchronous belt matched therewith. The second motor 12 outputs power to drive the inner shaft 7 to rotate through the synchronous belt transmission structure 15, so that the bending die 5 rotates a certain angle, thereby extending the bending path of the pipe fitting. After the pipe fitting is formed, it has a larger bending direction. When the second motor 12 is running, the bending die 5 rotates following the rotation of the clamping die 6.

[0028] like Figures 1 to 3 As shown, a mounting plate 16 is provided on the outside of the frame 3, and a first cylinder 17 and a second cylinder 18 are provided on the mounting plate 16. The first cylinder 17 is connected to the clamping die 6, and the second cylinder 18 is connected to a supporting wheel 21. The clamping die 6 is provided with a clamping wheel 20, and the clamping wheel 20 and the supporting wheel 21 are at the same height; the bending die 5 is provided with a pipe bending wheel 19, and the clamping wheel 20 and the supporting wheel 21 are located below the pipe bending wheel 19. The first cylinder 17 is driven to change the vertical height of the clamping die 6. The pipe fittings placed on the clamping die 6 or the clamping wheel 20 can be closely contacted with the bending groove or the pipe bending wheel 19 under the drive of the first cylinder 17, so as to avoid defects such as flattening, bending cracks, and bending rebound of the pipe fittings at the arc, thereby ensuring the forming quality of the pipe fittings; the second cylinder 18 can be driven to lift the supporting wheel 21, which is used to support and ensure the levelness of the pipe fittings, and ensure the reliability of the subsequent bending shape.

[0029] like Figure 6-1 and Figure 6-2 As shown, the clamping die 6 includes a first clamping die 22 and a second clamping die 23, the first clamping die 22 is provided with a first clamping groove 25, the second clamping die 23 is provided with a second clamping groove 26, and the second clamping groove 26 is higher than the first clamping groove 25; the bending die 5 includes a first bending die 27 and a second bending die 28, the first bending die 27 and the second bending die 28 are coaxially arranged, and the radius of the first bending die 27 is greater than the radius of the second bending die 28. The first bending die 27 corresponds to the first clamping die 22, and the second bending die 28 corresponds to the second clamping die 23. The bending die 5 and the clamping die 6 cooperate with the pipe fitting to form different bending radii, and the switching of the molds is achieved by the longitudinal movement of the support 2.

[0030] like Figure 6-1and Figure 6-2 As shown, a clamping block 24 is provided between the first clamping die 22 and the second clamping die 23, a first clamping groove 39 is provided at the bottom of the first clamping die 22, and the first clamping groove 39 is a conical structure, a second clamping groove 40 is provided at the top of the second clamping die 23, and the second clamping groove 40 is a square structure, and the two ends of the clamping block 24 are respectively clamped with the first clamping groove 39 and the second clamping groove 40. The above structure enables the clamping block 24 to fix the first clamping die 22 and the second clamping die 23, which can avoid the influence of the reduction of the structural strength caused by the use of connecting parts to fix the two. The two clamping dies 6 are fixed or disassembled by the clamping block 24. When the clamping die 6 is deformed and damaged due to long-term use, the damaged clamping die 6 can be replaced accordingly, and different types of clamping dies 6 can also be replaced. The conical first clamping groove 39 and the square second clamping groove 40 limit the clamping block 24 from falling out in the vertical direction, thereby improving the stability of the clamping block 24.

[0031] like Figure 1 and Figure 4 As shown, the machine also includes a machine table 10, on which a first guide rail 32 and a rack 30 are provided, a third motor 13 is provided on the base 1, the first motor 11 is connected to a gear 29, the gear 29 is meshed with the rack 30, and a first slider 31 is provided at the bottom of the base 1, and the first slider 31 is matched with the first guide rail 32. The third motor 13 realizes the lateral position movement of the entire mechanism along the first guide rail 32 through the gear rack meshing transmission. When the pipe is clamped, the bending die 5 and the clamping die 6 can switch positions, thereby switching the bending position of the pipe, which is convenient for continuous bending of the pipe; the gear rack meshing transmission is conducive to maintaining the position accuracy of the entire mechanism after movement.

[0032] like Figure 3 As shown, a support 2 is provided on the base 1, a frame 3 is fixedly connected to the support 2, a second slider 33 is provided at the bottom of the support 2, a second guide rail 34 is provided on the base 1, the second slider 33 cooperates with the second guide rail 34, and a screw drive motor 38 is provided at one end of the base 1. The base 1 has a built-in screw drive module, and the screw drive motor 38 drives the screw drive module to realize the movement of the support 2 along the second guide rail 34, thereby driving the longitudinal movement of the bending die 5 and the clamping die 6, which is convenient for the pipe fitting to switch another pair of bending dies 5 and clamping dies 6, so as to meet the production of pipe fittings with different bending radii in one process and improve production efficiency. The longitudinal movement of the above-mentioned support 2 combined with the lateral movement of the overall mechanism constitutes the planar movement of the bending die 5 and the clamping die 6, realizes the switching of the bending position of the pipe fitting and the mold, and the pipe fitting can be formed in one time during the production process.

[0033] like Figure 5 and Figure 7As shown, a transmission key 35 is provided on the inner shaft 7, and a bearing 36 is provided at the end of the inner shaft 7. A keyway 37 is provided in the mounting hole of the bending die 5 to cooperate with the transmission key 35. The inner shaft 7 drives the bending die 5 to rotate through key transmission, which is convenient for the assembly, disassembly and model replacement of the bending die 5. The pipe bending wheel 19 is installed on the inner shaft 7 through the bearing 36 and can rotate, which is suitable for bending shorter length pipes.

[0034] like Figure 3 and Figure 4 As shown, the first slider 31, the first guide rail 32, the second slider 33 and the second guide rail 34 are all arranged in pairs. The first slider 31 cooperates with the first guide rail 32 to accurately guide the lateral movement of the entire mechanism, and the second slider 33 cooperates with the second guide rail 34 to improve the position accuracy of the support 2 after the longitudinal movement. The above structure is arranged in pairs, has a stable support function, and improves the movement guidance effect.

[0035] The pipe bending mechanism can move the mold in a plane through the lateral movement of the base 1 and the longitudinal movement of the support 2, thereby realizing the change of the bending position of the pipe fitting and the switching of the mold. The pipe fitting can be bent continuously, which is conducive to the one-time forming of the pipe fitting and improves the production efficiency; the installation shaft 4 adopts the form of inner and outer shafts 8, which has a compact structure and high position accuracy. The pipe fitting is clamped by the bending mold 5 and the clamping mold 6 through the cylinder, which ensures the bending accuracy of the pipe fitting by the rotation of the clamping mold 6 and the forming quality of the pipe fitting; the bending mold 5 and the clamping mold 6 are easy to disassemble, which is convenient for maintenance and replacement of other types of molds, and improves the versatility of the equipment.

[0036] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A pipe bending mechanism, characterized in that: The invention comprises a base (1), a frame (3) is arranged above the base (1), a mounting shaft (4) is arranged inside the frame (3), the mounting shaft (4) is connected to a driving structure, a bending die (5) is arranged on the mounting shaft (4), and a clamping die (6) is arranged below the bending die (5).

2. The pipe bending mechanism according to claim 1, characterized in that: The driving structure comprises a first motor (11) and a second motor (12); one end of the mounting shaft (4) extends out of the frame (3); the mounting shaft (4) comprises an inner shaft (7) and an outer shaft (8); the first motor (11) and the outer shaft (8) are connected with a chain transmission structure (14); a connecting bracket (9) is fixedly connected to the outer shaft (8); the clamping mold (6) is fixedly connected to the connecting bracket (9); both ends of the inner shaft (7) extend out from the outer shaft (8); the bending mold (5) is fixedly connected to one end of the inner shaft (7); and the second motor (12) and the inner shaft (7) are connected with a synchronous belt transmission structure (15).

3. The pipe bending mechanism according to claim 2, characterized in that: The frame (3) is provided with a mounting plate (16) on the outside, and a first cylinder (17) and a second cylinder (18) are provided on the mounting plate (16), the first cylinder (17) is connected to the clamping die (6), and the second cylinder (18) is connected to a supporting wheel (21), the clamping die (6) is provided with a clamping wheel (20), and the clamping wheel (20) and the supporting wheel (21) are at the same height; the bending die (5) is provided with a pipe bending wheel (19), and the clamping wheel (20) and the supporting wheel (21) are located below the pipe bending wheel (19).

4. The pipe bending mechanism according to any one of claims 1 to 3, characterized in that: The clamping die (6) comprises a first clamping die (22) and a second clamping die (23); the first clamping die (22) is provided with a first clamping groove (25); the second clamping die (23) is provided with a second clamping groove (26); the second clamping groove (26) is higher than the first clamping groove (25); the bending die (5) comprises a first bending die (27) and a second bending die (28); the first bending die (27) and the second bending die (28) are coaxially arranged; the radius of the first bending die (27) is greater than the radius of the second bending die (28).

5. The pipe bending mechanism according to claim 4, characterized in that: A clamping block (24) is provided between the first clamping die (22) and the second clamping die (23); a first clamping groove (39) is provided at the bottom of the first clamping die (22); the first clamping groove (39) is in a conical structure; a second clamping groove (40) is provided at the top of the second clamping die (23); the second clamping groove (40) is in a square structure; two ends of the clamping block (24) are respectively clamped with the first clamping groove (39) and the second clamping groove (40).

6. The pipe bending mechanism according to claim 5, characterized in that: The invention also comprises a machine platform (10), wherein the machine platform (10) is provided with a first guide rail (32) and a rack (30), the base (1) is provided with a third motor (13), the first motor (11) is connected with a gear (29), the gear (29) is meshed with the rack (30), and a first slider (31) is provided at the bottom of the base (1), and the first slider (31) cooperates with the first guide rail (32).

7. The pipe bending mechanism according to claim 6, characterized in that: The base (1) is provided with a support (2), the frame (3) is fixedly connected to the support (2), a second slider (33) is provided at the bottom of the support (2), a second guide rail (34) is provided on the base (1), the second slider (33) cooperates with the second guide rail (34), and a screw transmission motor (38) is provided at one end of the base (1).

8. The pipe bending mechanism according to claim 2, characterized in that: A transmission key (35) is provided on the inner shaft (7), and a bearing (36) is provided at the end of the inner shaft (7).

9. The pipe bending mechanism according to claim 7, characterized in that: The first slider (31), the first guide rail (32), the second slider (33) and the second guide rail (34) are all arranged in pairs.

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