Steel pipe cold roll forming equipment

Abstract

The utility model relates to the technical field of steel pipe machining, in particular to steel pipe cold roll forming equipment which comprises a workbench, a mounting box, a hydraulic rod, a top bending block, a linkage block, a fixing base, a limiting roller, a transmission mechanism and a limiting mechanism. The mounting box is arranged on the workbench; the hydraulic rod is connected with the workbench through a supporting plate. The top bending block is connected with the output end of the hydraulic rod; the linkage block is located in the installation box and installed on the top bending block. The number of the fixing bases is two, and the two fixing bases are both installed on the workbench. The number of the limiting rollers is two, and the limiting rollers are rotationally connected with the fixing base. In the bending process of the steel pipe, the driving mechanism drives the limiting roller to rotate, the limiting roller rotates to push the pipe wall of the outer side of the steel pipe to the bending position, the steel pipe close to the limiting roller can be stretched in the bending process, the steel pipe at the bending position is prevented from being excessively stretched, the strength of the bending position of the steel pipe is effectively improved, and the service life of the steel pipe is prolonged. And the overall strength of the bent steel pipe is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe processing, in particular to a steel pipe cold bending forming device. Background Art

[0002] The arc-shaped steel round tubes commonly used in steel structures are usually welded into round straight tubes first, and then bent into the required arc shape through arc bending. The steel structure industry uses the following common processing methods to bend round straight steel tubes into arc-shaped bent tubes: Medium frequency heating bending: The heating ring is set on the steel tube, the bending part of the steel tube is heated, and then the heated steel tube is bent into an arc in a very narrow width under the action of external force.

[0003] Patent authorization announcement number CN210098617U discloses a cold bending forming equipment, including: a processing platform, on which a first fixed block, a second fixed block and a third fixed block are arranged, the first fixed block, the second fixed block and the third fixed block are arranged in an isosceles triangle, the first fixed block is located at the vertex of the isosceles triangle, the first fixed block is provided with a cylinder near the second fixed block, the output end of the cylinder is connected with an arc-shaped top bending block, the second fixed block and the third fixed block are provided with arc-shaped limit blocks near the first fixed block, the arc-shaped top bending block and the two arc-shaped limit blocks are at the same height. As described above, a cold bending forming equipment of the utility model solves the problems in the prior art that the hot bending pipe method is difficult to achieve small bending, wrinkles easily, and the heating temperature control is difficult to control, resulting in thinning of the steel pipe thickness and affecting the strength. The design is reasonable and suitable for production and popularization and application.

[0004] However, the above technical solution has the following shortcomings: during the bending process, the contact point between the steel pipe and the arc limit block is relatively static, and the outer side of the bent part of the steel pipe only stretches the steel pipe between the two arc limit blocks, which easily causes the steel pipe between the two arc limit blocks to be over-stretched, resulting in the outer side of the bent part of the steel pipe being too thin, affecting the strength of the steel pipe. Utility Model Content

[0005] The utility model aims to provide a steel pipe cold bending forming device in view of the problems existing in the background technology.

[0006] The technical solution of the utility model is: a steel pipe cold bending forming equipment, comprising:

[0007] Workbench;

[0008] An installation box is arranged on a workbench;

[0009] A hydraulic rod connected to the workbench through a support plate;

[0010] A top bending block connected to the output end of the hydraulic rod;

[0011] The linkage block is located in the installation box and is installed on the top bending block;

[0012] There are two fixing seats, both of which are installed on the workbench;

[0013] There are two limiting rollers, which are rotatably connected to the two fixed seats respectively;

[0014] There are two transmission mechanisms, which are symmetrically arranged in the installation box and are respectively connected to the two limiting rollers;

[0015] There are two limit mechanisms, both of which are arranged in the installation box and are respectively connected to the two transmission mechanisms.

[0016] Preferably, a movable groove is formed through the top of the workbench, and the linkage block passes through the workbench through the movable groove.

[0017] Preferably, each transmission mechanism comprises a mounting shaft, a drive gear and a drive rack;

[0018] One end of the installation shaft is rotatably connected to the installation box, and the other end of the installation shaft is connected to the limiting roller;

[0019] The driving gear is located in the installation box, and the driving gear is connected to the installation shaft;

[0020] The driving rack is slidably connected with the mounting box, the driving rack is meshed with the driving gear, and one end of the driving rack is in contact with the linkage block.

[0021] Preferably, a return spring is also included, wherein the fixed end of the return spring is connected to the mounting box, and the movable end of the return spring is connected to the driving rack.

[0022] Preferably, each limiting mechanism comprises a limiting ratchet, a limiting pawl and a limiting spring;

[0023] The limit ratchet is located in the installation box, and the limit ratchet is connected to the installation shaft;

[0024] The limit pawl is located in the installation box, and the limit pawl is rotatably connected to the installation box through a rotating shaft;

[0025] The fixed end of the limit spring is connected to the installation box, the movable end of the limit spring is connected to the limit pawl, and the limit pawl is fitted with the pawl of the limit ratchet wheel under the action of the limit spring.

[0026] Preferably, the bottom of the workbench is provided with supporting legs, and four supporting legs are provided and located at the four corners of the workbench.

[0027] Compared with the prior art, the above technical solution of the utility model has the following beneficial technical effects:

[0028] In the process of bending the steel pipe, the driving mechanism drives the limit roller to rotate, and the limit roller rotates to push the pipe wall outside the steel pipe toward the bending position, so that the steel pipe near the limit roller can be stretched during the bending process, avoiding excessive stretching of the steel pipe at the bending position, effectively improving the strength of the steel pipe bending position, and then improving the overall strength of the steel pipe after bending. The limit mechanism can prevent the limit roller from rotating in the opposite direction during the bending process, further improving the bending quality of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional diagram of an embodiment of the present utility model;

[0030] Figure 2 A cross-sectional view of an embodiment of the present utility model;

[0031] Figure 3 A three-dimensional diagram of a transmission mechanism in an embodiment of the present utility model;

[0032] Figure 4 This is a three-dimensional diagram of a limiting mechanism in an embodiment of the present utility model.

[0033] Figure numerals: 1. workbench; 2. installation box; 3. hydraulic rod; 4. transmission mechanism; 41. installation shaft; 42. driving gear; 43. driving rack; 44. reset spring; 5. limiting mechanism; 51. limiting ratchet; 52. limiting pawl; 53. limiting spring; 6. support plate; 7. top bending block; 8. linkage block; 9. fixed seat; 10. limiting roller; 11. movable groove; 12. support leg. DETAILED DESCRIPTION

[0034] Embodiment 1

[0035] like Figure 1-4 As shown, the utility model provides a steel pipe cold bending forming equipment, including a workbench 1, a mounting box 2, a hydraulic rod 3, a top bending block 7, a linkage block 8, a fixing seat 9, a limiting roller 10, a transmission mechanism 4 and a limiting mechanism 5;

[0036] A movable groove 11 is formed through the top of the workbench 1, and the linkage block 8 passes through the workbench 1 through the movable groove 11. A supporting leg 12 is formed at the bottom of the workbench 1. Four supporting legs 12 are provided and are located at the four corners of the workbench 1.

[0037] The installation box 2 is arranged on the workbench 1;

[0038] The hydraulic rod 3 is fixedly connected to the workbench 1 through the support plate 6, and the movement of the hydraulic rod 3 is controlled by the hydraulic system and powered by it;

[0039] The top bending block 7 is fixedly connected to the output end of the hydraulic rod 3;

[0040] The linkage block 8 is located in the installation box 2, and the linkage block 8 is fixedly connected to the bottom of the top bending block 7;

[0041] Two fixing seats 9 are provided, and both fixing seats 9 are installed on the workbench 1 and located on both sides of the movable groove 11;

[0042] Two limiting rollers 10 are provided, and the two limiting rollers 10 are rotatably connected to the two fixing seats 9 respectively;

[0043] There are two transmission mechanisms 4, which are symmetrically arranged in the installation box 2, and the two transmission mechanisms 4 are respectively connected to the two limiting rollers 10;

[0044] Two limiting mechanisms 5 are provided, and both limiting mechanisms 5 are arranged in the installation box 2 . The two limiting mechanisms 5 are respectively connected to the two transmission mechanisms 4 in transmission.

[0045] Embodiment 2

[0046] like Figure 1-3 As shown, the utility model proposes a steel pipe cold bending forming equipment. Compared with the first embodiment, this embodiment further specifically discloses the structure of the transmission mechanism 4; each transmission mechanism 4 includes a mounting shaft 41, a driving gear 42, a driving rack 43 and a return spring 44;

[0047] One end of the installation shaft 41 is rotatably connected to the installation box 2, and the other end of the installation shaft 41 is connected to the limiting roller 10;

[0048] The driving gear 42 is located in the installation box 2, and the driving gear 42 is fixedly connected to the installation shaft 41;

[0049] The driving rack 43 is slidably connected to the mounting box 2, the driving rack 43 and the driving gear 42 are meshed with each other, and one end of the driving rack 43 is in contact with the linkage block 8;

[0050] The fixed end of the return spring 44 is fixedly connected to the installation box 2 , and the movable end of the return spring 44 is fixedly connected to the driving rack 43 .

[0051] Embodiment 3

[0052] like Figure 2-4 As shown, the steel pipe cold bending forming equipment proposed by the utility model, compared with the second embodiment, this embodiment further specifically discloses the structure of the limiting mechanism 5; each limiting mechanism 5 includes a limiting ratchet 51, a limiting pawl 52 and a limiting spring 53;

[0053] The limiting ratchet 51 is located in the installation box 2, and the limiting ratchet 51 is fixedly connected to the installation shaft 41;

[0054] The limiting pawl 52 is located in the installation box 2, and the limiting pawl 52 is rotatably connected to the installation box 2 through a rotating shaft, and one end of the limiting pawl 52 passes through the installation box 2 and extends to the outside of the installation box 2;

[0055] The fixed end of the limit spring 53 is fixedly connected to the installation box 2 , and the movable end of the limit spring 53 is fixedly connected to the limit pawl 52 . Under the action of the limit spring 53 , the limit pawl 52 fits with the pawl of the limit ratchet 51 .

[0056] The steel pipe to be bent is placed between the limiting roller 10 and the top bending block 7. The hydraulic rod 3 works to push the top bending block 7 and the linkage block 8 to move together. The top bending block 7 moves and cooperates with the limiting roller 10 to bend the steel pipe. During the bending process, the linkage block 8 moves to push the driving rack 43 to move. The driving rack 43 drives the driving gear 42 and the mounting shaft 41 to rotate together through meshing. The rotation of the mounting shaft 41 drives the limiting roller 10 to rotate. The limiting roller 10 rotates to push the pipe wall outside the steel pipe toward the bending point, so that the steel pipe near the limiting roller 10 can be stretched during the bending process to avoid excessive stretching of the steel pipe at the bending point, effectively improving the strength of the steel pipe at the bending point. During the bending process, when the hydraulic rod 3 contracts, the limiting pawl 52, under the action of the limiting spring 53, engages with the limiting ratchet 51 to prevent the limiting roller 10 from rotating in the opposite direction, thereby improving the bending accuracy and further improving the bending quality of the steel pipe.

[0057] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A steel pipe cold bending forming equipment, characterized in that: include: Workbench (1); An installation box (2) is arranged on the workbench (1); A hydraulic rod (3) connected to the workbench (1) via a support plate (6); A top bending block (7) connected to the output end of the hydraulic rod (3); A linkage block (8) is located in the installation box (2), and the linkage block (8) is installed on the top bending block (7); Two fixing seats (9) are provided, and both fixing seats (9) are installed on the workbench (1); Two limiting rollers (10) are provided, and the two limiting rollers (10) are rotatably connected to the two fixing seats (9) respectively; The transmission mechanism (4) is provided with two transmission mechanisms (4), the two transmission mechanisms (4) are symmetrically arranged in the installation box (2), and the two transmission mechanisms (4) are respectively connected to the two limiting rollers (10) in a transmission manner; Two limiting mechanisms (5) are provided, and both limiting mechanisms (5) are arranged in the installation box (2). The two limiting mechanisms (5) are respectively connected to the two transmission mechanisms (4) in a transmission manner.

2. The steel pipe cold bending forming equipment according to claim 1, characterized in that: A movable groove (11) is provided through the top of the workbench (1), and the linkage block (8) passes through the workbench (1) through the movable groove (11).

3. The steel pipe cold bending forming equipment according to claim 1, characterized in that: Each transmission mechanism (4) comprises a mounting shaft (41), a driving gear (42) and a driving rack (43); One end of the installation shaft (41) is rotatably connected to the installation box (2), and the other end of the installation shaft (41) is connected to the limiting roller (10); The driving gear (42) is located in the installation box (2), and the driving gear (42) is connected to the installation shaft (41); The driving rack (43) is slidably connected to the installation box (2), the driving rack (43) and the driving gear (42) are meshed with each other, and one end of the driving rack (43) is in contact with the linkage block (8).

4. The steel pipe cold bending forming equipment according to claim 3, characterized in that: It also includes a return spring (44), the fixed end of the return spring (44) is connected to the installation box (2), and the movable end of the return spring (44) is connected to the driving rack (43).

5. The steel pipe cold bending forming equipment according to claim 3, characterized in that: Each limiting mechanism (5) comprises a limiting ratchet (51), a limiting pawl (52) and a limiting spring (53); The limiting ratchet (51) is located in the installation box (2), and the limiting ratchet (51) is connected to the installation shaft (41); The limiting pawl (52) is located in the installation box (2), and the limiting pawl (52) is rotatably connected to the installation box (2) via a rotating shaft; The fixed end of the limit spring (53) is connected to the installation box (2), and the movable end of the limit spring (53) is connected to the limit pawl (52). Under the action of the limit spring (53), the limit pawl (52) fits with the pawl of the limit ratchet (51).

6. The steel pipe cold bending forming equipment according to claim 1, characterized in that: The bottom of the workbench (1) is provided with supporting legs (12), and four supporting legs (12) are provided and located at the four corners of the workbench (1).

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