High-precision bending device for metal pipe fitting

Abstract

The utility model belongs to the technical field of metal pipe fitting machining, and particularly relates to a metal pipe fitting high-precision bending device which comprises a working table, a driving fixing plate is fixedly connected to the top face of an inner cavity of the working table, a driving assembly is arranged on the driving fixing plate, and a clamp bottom plate is fixedly connected to the top face of the working table. A base plate is fixedly connected to the top face of the clamp bottom plate, a positioning clamping assembly is arranged on the top face of the workbench, arc-shaped grooves are formed in the top face of the clamp bottom plate and the top face of the base plate and penetrate through the top face of the workbench, a rotating disc is arranged on the portion, located on the lower side of the arc-shaped grooves, of an inner cavity of the workbench, and a bending wheel is eccentrically and fixedly connected to the top face of the rotating disc. According to the utility model, the metal bar can be in a stable state in the bending process, the deviation caused by the influence of external force is reduced to the greatest extent, and the bending precision is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of bar processing technology, specifically relating to a high-precision bending device for metal bars. Background Technology

[0002] Pipe bending is a process of bending pipes at a certain angle and radius; common methods include cold bending and hot bending.

[0003] Cold bending method: This method involves applying external force to the pipe fitting at room temperature using a bending device to bend it. Advantages include simple operation, low cost, and suitability for small batches of large-diameter pipe fittings. Disadvantages include the potential for significant springback and certain requirements on the pipe fitting material.

[0004] Hot bending: The pipe is first heated to a certain temperature before bending. Advantages include reduced springback, the ability to bend complex shapes and large-radius pipes, and suitability for various materials. Disadvantages include the need for heating equipment, a more complex process, and higher costs.

[0005] Most existing pipe bending equipment is manual or semi-automatic. In actual use, these two bending methods have low bending accuracy for shorter pipes, lack corresponding guide and limiting structures, and are prone to skewing due to bending force and pipe stress during the bending process, resulting in low practical performance. Utility Model Content

[0006] The purpose of this invention is to provide a high-precision bending device for metal pipes, which can keep the pipes in a stable state during the bending process, minimize deviations caused by external forces, and effectively improve bending accuracy.

[0007] The specific technical solution adopted by this utility model is as follows:

[0008] A high-precision bending device for metal pipes includes a worktable. A drive fixing plate is fixedly connected to the top surface of the inner cavity of the worktable. A drive assembly is provided on the drive fixing plate. A clamp base plate is fixedly connected to the top surface of the worktable. A pad is fixedly connected to the top surface of the clamp base plate. A clamping assembly is provided on the top surface of the clamp base plate. Both the top surfaces of the clamp base plate and the pad are provided with arc-shaped grooves that penetrate the top surface of the worktable. A turntable is provided in the inner cavity of the worktable below the arc-shaped grooves. A bending wheel is eccentrically fixedly connected to the top surface of the turntable.

[0009] Furthermore, the drive assembly includes a motor fixedly connected to the bottom surface of the drive mounting plate, the output shaft of the motor passing through the drive mounting plate and fixedly connected to a first gear, a second gear meshing on one side of the first gear, and the turntable fixedly connected to the top surface of the second gear.

[0010] Furthermore, the positioning and clamping assembly includes an oil pump unit fixedly installed in the inner cavity of the workbench, an oil pipe connected to the oil pump unit, a foot fixedly connected to the top surface of the workbench near the rear side, an oil cylinder fixedly connected to the foot, and the other end of the oil pipe connected to the oil cylinder.

[0011] The cylinder telescopic end is fixedly connected to a rear clamping block, and the top surface of the pad is fixedly connected to a bending die core, with the rear clamping block corresponding to the bending die core.

[0012] The arc-shaped groove has a crescent shape and the arc angle is greater than 90°.

[0013] Furthermore, a controller is installed on the top of the workbench.

[0014] Furthermore, the sidewalls of the rear clamping block opposite to the bending die core are both arc-shaped.

[0015] The technical effects achieved by this utility model are as follows:

[0016] This utility model discloses a high-precision bending device for metal pipes. Through the cooperation of the work cabinet, drive assembly, positioning and clamping assembly, etc., the device uses a limit groove and hydraulic cylinder to limit and fix the pipe, so that the pipe is in a stable state during the bending process, minimizing the deviation caused by external force and effectively improving the bending accuracy. Attached Figure Description

[0017] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0019] Figure 3 This is a bottom view of an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the transmission assembly according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the rotating plate in an embodiment of this utility model;

[0022] Figure 6 This is an embodiment of the present utility model. Figure 3 Enlarged view of point A in the image.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Workbench; 2. Drive fixing plate; 3. Motor; 4. First gear; 5. Second gear; 6. Turntable; 7. Bending wheel; 8. Pad plate; 9. Arc groove; 10. Mold core; 11. Rear clamping block; 12. Leg; 13. Hydraulic cylinder; 14. Fixture base plate; 15. Oil pump unit; 16. Oil pipe; 17. Controller. Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0026] like Figures 1-6 As shown, a high-precision bending device for metal pipes includes a worktable 1. A drive fixing plate 2 is fixedly connected to the top surface of the inner cavity of the worktable 1. A drive assembly is provided on the drive fixing plate 2. A clamp base plate 14 is fixedly connected to the top surface of the worktable 1. A pad plate 8 is fixedly connected to the top surface of the clamp base plate 14. A positioning clamping assembly is provided on the top surface of the worktable 1. An arc-shaped groove 9 is opened on the top surface of both the clamp base plate 14 and the pad plate 8. The arc-shaped groove 9 penetrates the top surface of the worktable 1. A turntable 6 is provided in the inner cavity of the worktable 1 below the arc-shaped groove 9. A bending wheel 7 is eccentrically fixedly connected to the top surface of the turntable 6.

[0027] like Figure 2 and Figure 4 As shown, the drive assembly includes a motor 3 fixedly connected to the bottom surface of the drive mounting plate 2. The output shaft of the motor 3 passes through the drive mounting plate 2 and is fixedly connected to a first gear 4. A second gear 5 meshes with one side of the first gear 4. The turntable 6 is fixedly connected to the top surface of the second gear 5.

[0028] The transmission method employing the engagement of the first gear 4 and the second gear 5 achieves a transmission efficiency of 96%-99%. Furthermore, the gear transmission maintains a constant transmission ratio, meaning the speed ratio between the driving gear and the driven gear remains unchanged. This is because the tooth profile curves of the gears are designed according to a specific pattern, and the transmission ratio of each pair of teeth is fixed during meshing. This precise transmission ratio makes the operation of the mechanical equipment more stable and accurate. Applied to this solution, the rotation angle of the bending wheel 7 can be precisely controlled, allowing for application to different bending processes.

[0029] like Figure 2 and Figure 6 As shown, the positioning and clamping assembly includes an oil pump unit 15 fixedly installed in the inner cavity of the worktable 1, an oil pipe 16 connected to the oil pump unit 15, a leg 12 fixedly connected to the top surface of the worktable 1 near the rear side, an oil cylinder 13 fixedly connected to the leg 12, and the other end of the oil pipe 16 connected to the oil cylinder 13.

[0030] The extension end of the hydraulic cylinder 13 is fixedly connected to a rear clamping block 11, and the top surface of the pad plate 8 is fixedly connected to a mold core 10. The rear clamping block 11 corresponds to the mold core 10. The side walls of the rear clamping block 11 and the mold core 10 are both arc-shaped.

[0031] The end face of the die core 10 near the bending wheel 7 is an arc-shaped structure. When the bending wheel 7 presses the pipe, the pipe can fit against the arc-shaped surface of the die core 10, thereby bending the pipe into an arc shape. In addition, the die core 10 is connected to the pad 8 by bolts. In actual use, the bolts can be loosened according to the bending requirements, and different models or shapes of die cores 10 can be replaced, thereby increasing the adaptability of bending.

[0032] like Figure 6 As shown, the arc-shaped groove 9 has a crescent shape and an arc angle greater than 90°. In actual use, the angle of the bending wheel 7 can be controlled by programming to adapt to different bending processes and parameters.

[0033] like Figures 1-3 As shown, a controller 17 is installed on the top of the workbench 1. The controller 17 is used to control and monitor the operating parameters and program running status of other components such as the oil pump unit 15, the oil cylinder 13, and the motor 3. It is a mature existing technology and will not be described in detail in this solution.

[0034] The working principle of this utility model is as follows: First, the pipe is placed on the pad 8 and positioned between the rear clamping block 11 and the mold core 10. Then, the oil pump unit 15 is started to control the operation of the oil cylinder 13. The extension end of the oil cylinder 13 drives the rear clamping block 11 to move towards the mold core 10, thereby squeezing the pipe between the rear clamping block 11 and the mold core 10 and using its arc surface to increase stability. Then, the motor 3 is started. The output shaft of the motor 3 drives the first gear 4 to rotate. The first gear 4 meshes with the second gear 5 and drives the turntable 6 to rotate. The turntable 6 drives the bending wheel 7 to rotate eccentrically. The pressure applied to the pipe by the bending wheel 7 is used to bend the pipe. After the bending is completed, the oil cylinder 13 is reset and the next bending is repeated.

[0035] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A high-precision bending device for metal pipe fittings, characterized in that: The workbench (1) includes a drive fixing plate (2) fixedly connected to the top surface of the inner cavity of the workbench (1), a drive fixing plate (2) is provided on the drive fixing plate (2), a clamp base plate (14) is fixedly connected to the top surface of the workbench (1), a pad plate (8) is fixedly connected to the top surface of the clamp base plate (14), a positioning clamping component is provided on the top surface of the workbench (1), and an arc groove (9) is opened on the top surface of both the clamp base plate (14) and the pad plate (8). The arc groove (9) penetrates the top surface of the workbench (1), and a turntable (6) is provided in the inner cavity of the workbench (1) below the arc groove (9). A bending wheel (7) is eccentrically fixedly connected to the top surface of the turntable (6). The drive assembly includes a motor (3) fixedly connected to the bottom surface of the drive fixing plate (2). The output shaft of the motor (3) passes through the drive fixing plate (2) and is fixedly connected to a first gear (4). A second gear (5) meshes with one side of the first gear (4). The turntable (6) is fixedly connected to the top surface of the second gear (5). The positioning and clamping assembly includes an oil pump unit (15) fixedly installed in the inner cavity of the workbench (1), an oil pipe (16) connected to the oil pump unit (15), a leg (12) fixedly connected to the top surface of the workbench (1) near the rear side, an oil cylinder (13) fixedly connected to the leg (12), the other end of the oil pipe (16) connected to the oil cylinder (13), a rear clamping block (11) fixedly connected to the telescopic end of the oil cylinder (13), a bending die core (10) fixedly connected to the top surface of the pad (8), and the rear clamping block (11) corresponding to the bending die core (10).

2. The high-precision bending device for metal pipes according to claim 1, characterized in that: The arc-shaped groove (9) has a crescent-shaped structure and the arc of the arc-shaped groove (9) is greater than 90°.

3. The high-precision bending device for metal pipes according to claim 1, characterized in that: A controller (17) is installed on the top of the workbench (1).

4. The high-precision bending device for metal pipes according to claim 1, characterized in that: The sidewalls of the rear clamping block (11) and the bending die core (10) are both arc-shaped.

Images