Accurate positioning device for efficient automatic pipe bending machine

Abstract

The utility model provides an accurate positioning device for an efficient automatic pipe bender, which relates to the technical field of pipe processing devices and comprises a U-shaped plate and a fixing seat, the fixing seat is rotatably mounted in the middle of the U-shaped plate, a hydraulic cylinder is fixedly mounted in the middle of the fixing seat, a support is fixedly mounted at the upper end of the fixing seat, and the hydraulic cylinder is fixedly mounted on the support. A center shaft is fixedly installed at the upper end of the support, a conical insertion rod is slidably inserted into the middle of the center shaft, the output end of the hydraulic cylinder penetrates through the middle of the support and is fixedly connected with the bottom of the conical insertion rod, and a plurality of slope sliding grooves are evenly formed in the periphery of the middle of the center shaft and communicate with the conical groove. And a plurality of sliding rods are uniformly clamped in the middle of the inclined surface sliding groove in a sliding manner. The pipe bending positioning device solves the problems that when a traditional pipe bending positioning device fixes a pipe in an external clamping mode, the pipe is prone to shaking, indentations, scratches and other damage can be generated on the surface of the pipe, and the quality of the pipe is affected.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing equipment technology, and in particular to a precision positioning device for a high-efficiency automatic pipe bending machine. Background Technology

[0002] A pipe bending machine is a mechanical device used to bend pipes into specific angles and shapes. It is widely used in many industries such as automobile manufacturing, shipbuilding, construction, furniture, and pipeline installation. When operating a pipe bending machine, the pipe to be processed needs to be positioned, and then bent with the bending tool. Precise positioning makes the operation of the pipe bending machine more stable and reliable, reduces accidents caused by inaccurate pipe positioning, eliminates the need for a lot of time for adjustment and calibration, and enables fast and accurate pipe bending operations, thereby improving production efficiency.

[0003] In the current pipe bending manufacturing field, traditional pipe positioning devices have many limitations. On the one hand, most traditional pipe bending machine positioning structures typically rely on simple external clamps to fix the pipe from the outside, which cannot effectively cope with the displacement and shaking caused by changes in internal stress during the bending process. This makes it difficult to ensure that the bending operation strictly follows the preset precision, resulting in large deviations in the dimensional and shape accuracy of the bent pipe and unstable product quality. On the other hand, if the clamping force of the clamp is uneven or excessive, it will cause damage such as indentations and scratches on the pipe surface, affecting the appearance quality of the pipe. For some pipes with high surface quality requirements, such as those used in the decoration or food and beverage industries, such damage may lead to product defects. In addition, traditional structures usually use simple pins or rough threaded fastening methods. During the bending process, factors such as vibration and external forces can easily cause the angle to shift, further affecting the bending quality. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a precise positioning device for an efficient automatic pipe bending machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a precision positioning device for a high-efficiency automatic pipe bending machine, comprising: a U-shaped plate and a fixed base, the fixed base being rotatably installed in the middle of the U-shaped plate, a hydraulic cylinder being fixedly installed in the middle of the fixed base, a bracket being fixedly installed at the upper end of the fixed base, a central shaft being fixedly installed at the upper end of the bracket, a tapered insert being slidably inserted into the middle of the central shaft, the output end of the hydraulic cylinder passing through the middle of the bracket and being fixedly connected to the bottom of the tapered insert, multiple inclined grooves being evenly opened around the middle of the central shaft, the multiple inclined grooves being connected to the tapered grooves, multiple sliding rods being evenly slidably engaged in the middle of the inclined grooves, one end of the sliding rods cooperating with the tapered insert, a rubber pad being fixedly installed at one end of each of the multiple sliding rods, the diameter of the rubber pad being larger than the diameter of the inclined groove, and a fixed shaft being fixedly installed at both ends of the fixed base.

[0006] In a preferred embodiment, the other ends of the two fixed shafts are rotatably connected to both sides of the middle part of the U-shaped plate.

[0007] In one preferred embodiment, one end of the fixed shaft passes through the U-shaped plate and is fixedly mounted with a gear one, and a gear two is fixedly mounted on one side of the gear one.

[0008] In a preferred embodiment, gear one and gear two mesh with each other, a crank handle is fixedly installed in the middle of gear two, and a cross slot is provided in the middle of one end of the crank handle.

[0009] In a preferred embodiment, a sliding groove is provided on one side of the U-shaped plate, and a limiting plate is slidably engaged in the middle of the sliding groove.

[0010] In a preferred embodiment, one end of the limiting plate engages with the tooth groove between every two adjacent teeth of the second gear.

[0011] In a preferred embodiment, handles are fixedly installed on both sides of the middle part of one end of the U-shaped plate.

[0012] In a preferred embodiment, a base is fixedly installed at the lower end of the U-shaped plate, and casters are fixedly installed at the four corners of the lower end of the base.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In use, this utility model first places the pipe onto the surface of the central shaft. The central shaft provides initial positioning of the pipe, quickly guiding it to a roughly accurate position. This eliminates the need for extensive adjustments when the hydraulic cylinder is activated for precise internal support positioning, thus improving work efficiency. Subsequently, the hydraulic cylinder pushes the tapered insert, which in turn drives the sliding rod and rubber pads to provide internal support positioning for the pipe. Multiple rubber pads apply support evenly from different positions inside the pipe, adhering tightly to the inner wall and providing strong and stable friction. This effectively prevents displacement or swaying of the pipe during bending, ensuring the bending operation strictly adheres to the preset precision. This significantly improves the dimensional and shape accuracy of the bent pipe, guaranteeing the stability of the bending quality.

[0015] 2. In use, the hydraulic cylinder, tapered insert, sliding rod, and rubber pad in this device form an adjustable internal support structure. When the pipe is fitted onto the central shaft, activating the hydraulic cylinder moves the tapered insert. The movement of the tapered insert causes the sliding rod to expand outwards or contract inwards, thereby causing the rubber pad to adhere to the inner wall of the pipe. This allows for adaptive adjustment of the fit according to the inner diameter of different pipes, achieving tight support and precise positioning for pipes of varying inner diameters, thus enhancing its practicality.

[0016] 3. In use, the meshing transmission of gear one and gear two, through a rationally designed gear ratio, enables a wide range of adjustment of the fixed seat angle while meeting the needs of precise fine-tuning, thus expanding its application range in different types of pipe bending processes. The cross slot at one end of the crank handle provides convenience for connecting other power tools or adjustment equipment. When facing pipe bending work with high strength or high precision requirements, electric, pneumatic, or other drive equipment can be connected to achieve more efficient and precise rotation control of the crank handle with the help of these external tools. Attached Figure Description

[0017] Figure 1 This utility model provides a schematic diagram of the external structure of a precision positioning device for a high-efficiency automatic pipe bending machine.

[0018] Figure 2 This utility model provides a precision positioning device for a high-efficiency automatic pipe bending machine. Figure 1 A magnified structural diagram of region A in the middle.

[0019] Figure 3 A schematic diagram of the insertion structure of a precision positioning device for a high-efficiency automatic pipe bending machine provided by this utility model.

[0020] Figure 4 This is a cross-sectional disassembly diagram of a precision positioning device for a high-efficiency automatic pipe bending machine provided by this utility model.

[0021] Legend:

[0022] 1. U-shaped plate; 11. Base; 12. Casters; 13. Handle; 14. Gear 1; 15. Gear 2; 16. Crank handle; 17. Cross slot; 18. Sliding groove; 19. Limiting plate; 2. Fixed seat; 21. Hydraulic cylinder; 22. Bracket; 23. Central shaft; 24. Conical groove; 25. Inclined sliding groove; 26. Sliding rod; 27. Rubber pad; 28. Conical insert rod; 29. ​​Fixed shaft. Detailed Implementation

[0023] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0024] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0025] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected through a transitional structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] Example 1: As Figure 1-4 As shown, this utility model provides a technical solution: a precision positioning device for a high-efficiency automatic pipe bending machine, comprising: a U-shaped plate 1 and a fixed base 2. The fixed base 2 is rotatably installed in the middle of the U-shaped plate 1. A hydraulic cylinder 21 is fixedly installed in the middle of the fixed base 2. A bracket 22 is fixedly installed at the upper end of the fixed base 2. A central shaft 23 is fixedly installed at the upper end of the bracket 22. A tapered rod 28 is slidably inserted into the middle of the central shaft 23. The output end of the hydraulic cylinder 21 passes through the middle of the bracket 22 and is fixedly connected to the bottom of the tapered rod 28. Multiple inclined grooves 25 are evenly opened around the middle of the central shaft 23. The multiple inclined grooves 25 are all connected to the tapered grooves 24. Multiple sliding rods 26 are evenly slidably engaged in the middle of the inclined grooves 25. One end of the sliding rod 26 cooperates with the tapered rod 28. A rubber pad 27 is fixedly installed at one end of each of the multiple sliding rods 26. The diameter of the rubber pad 27 is larger than the diameter of the inclined groove 25. Fixed shafts 29 are fixedly installed at both ends of the fixed base 2.

[0029] In this embodiment, when bending the pipe, the pipe is first placed on the surface of the central shaft 23, which initially positions the pipe. Then, the hydraulic cylinder 21 is activated, and its output end extends upward, pushing the tapered insert 28 to slide upward along the tapered groove 24. As the tapered insert 28 rises, due to its unique inclined surface fit structure with the slide rod 26, the slide rod 26 begins to slide outward in the evenly distributed inclined sliding grooves 25 around the central shaft 23. One end of the slide rod 26 is equipped with a rubber pad 27, and the diameter of the rubber pad 27 is larger than the diameter of the inclined sliding groove 25. These rubber pads 27 gradually approach and tightly fit the inner wall of the pipe. Multiple rubber pads 27 exert force simultaneously from different positions inside the pipe, relying on sufficient contact area and friction to provide stable and accurate positioning for the pipe, effectively preventing the pipe from being bent during the bending process. In case of displacement or shaking, the bending operation is strictly performed according to the preset precision. Throughout the bending process, the fixed seat 2 can flexibly adjust its angle according to the actual needs of the bending action of the bending machine, through the rotational connection with the U-shaped plate 1. This ensures that the internal support positioning structure can maintain the accurate positioning effect of the pipe under different bending angle requirements, greatly improving the quality and stability of the bending. When the bending operation is completed, the output end of the hydraulic cylinder 21 retracts, driving the tapered insert 28 to slide down along the tapered groove 24. At this time, the slide rod 26 slides inward under its own weight and the guidance of the inclined slide groove 25. The rubber pad 27 then disengages from the inner wall of the pipe. In this way, the bent pipe can be easily removed from the surface of the central shaft 23. The entire positioning and bending process is completed efficiently and orderly.

[0030] Example 2: As Figure 1-3 As shown, the other ends of the two fixed shafts 29 are rotatably connected to the two sides of the middle of the U-shaped plate 1. One end of one fixed shaft 29 passes through the U-shaped plate 1 and is fixedly installed with a gear 14. A gear 2 15 is fixedly installed on one side of the gear 14. The gear 14 and the gear 2 15 mesh with each other. A crank handle 16 is fixedly installed in the middle of the gear 2 15. A cross slot 17 is opened in the middle of one end of the crank handle 16. A sliding groove 18 is opened in one side of the U-shaped plate 1. A limiting plate 19 is slidably engaged in the middle of the sliding groove 18. One end of the limiting plate 19 is engaged with the tooth groove between every two adjacent teeth of the gear 2 15. Handles 13 are fixedly installed on both sides of the middle of one end of the U-shaped plate 1. A base 11 is fixedly installed at the lower end of the U-shaped plate 1. Universal wheels 12 are fixedly installed at the four corners of the lower end of the base 11.

[0031] In this embodiment, the base 11 fixedly installed at the lower end of the U-shaped plate 1, and the casters 12 equipped at the four corners of the lower end of the base 11, enable the device to move easily within the working area. The operator can use the handles 13 on both sides of the middle of one end of the U-shaped plate 1 to push the device conveniently and effortlessly, flexibly adjust its position, and quickly connect it to different pipe bending machines, thereby saving the time cost of equipment installation and position adjustment. Turning the crank handle 16 can realize the angle adjustment of the fixed seat 2. The crank handle 16 is fixedly connected to the second gear 15, the second gear 15 meshes with the first gear 14, and the first gear 14 is fixed on the fixed shaft 29. This gear transmission structure converts the rotation of the crank handle 16 into the rotation of the fixed shaft 29, thereby driving the fixed seat 2 to rotate around the shaft. The operation is intuitive and simple. The sliding groove 18 opened on one side of the U-shaped plate 1 and the limiting plate 19 that slides and engages with it, together with the second gear 15, constitute a stable angle locking mechanism. After the fixed base 2 is adjusted to a suitable angle by the crank handle 16, the limiting plate 19 is slid out of the sliding groove 18, so that one end of it is engaged in the tooth groove between every two adjacent teeth of the second gear 15. Since the tooth groove structure of the gear has a precise shape and spacing, the limiting plate 19 can effectively prevent the second gear 15 from rotating, thereby preventing the fixed base 2 from rotating accidentally due to external force during the pipe bending process, ensuring that the pipe always maintains the preset angle when bending, which greatly improves the accuracy and quality stability of the pipe bending. The cross slot 17 opened in the middle of one end of the crank handle 16 provides the possibility of connecting other power tools or adjustment equipment. In some work that requires more efficient and precise angle adjustment, an electric or pneumatic drive device can be connected by inserting a suitable cross tool head to realize fast and precise rotation control of the crank handle 16, further enhancing the flexibility of the device angle adjustment and meeting the diverse needs of different work intensity and precision requirements.

[0032] like Figure 1-4 As shown,

[0033] During pipe bending, the operator can hold the handles 13 on both sides of the middle of one end of the U-shaped plate 1 and push the device. The universal wheels 12 facilitate the movement of the device in the workshop and other work areas, making it easy to connect the device with different pipe bending equipment. Then, the pipe is placed on the surface of the central shaft 23. The position of the central shaft 23 is used to initially determine the position of the pipe, ensuring it is in the approximately correct position for the pipe bending operation. Then, the hydraulic cylinder 21 is activated, and its output end extends upward, pushing the tapered insert 28 to slide upward along the tapered groove 24. Since the tapered insert 28 cooperates with the sliding rod 26, and there is an inclined sliding groove 25 on the central shaft 23, as the tapered insert 28 rises, it will push the sliding rod 26 to slide outward in the inclined sliding groove 25 through the inclined surface action. The rubber pad 27 at one end of the slide rod 26 will fit tightly against the inner wall of the pipe. Utilizing the friction and large contact area of ​​the rubber pad 27, the pipe is firmly fixed on the central shaft 23 to achieve precise positioning and prevent the pipe from moving or shaking during subsequent bending. The crank 16 drives the gear 2 15 and the gear 1 14 to rotate, thereby causing the fixed seat 2 to rotate. This allows for adjustment of the bending angle of the pipe to meet different bending process requirements. When the fixed seat 2 is adjusted to the required angle, the limiting plate 19 slides out from the sliding groove 18 on one side of the U-shaped plate 1. One end of the limiting plate 19 will be engaged in the tooth groove between every two adjacent teeth of the gear 2 15. Since the shape and spacing of the gear teeth are fixed, the limiting plate 19 prevents the rotation of gear 15 after it is engaged. This, in turn, restricts the rotation of gear 14 and the fixed shaft 29 through gear transmission, ultimately preventing the fixed seat 2 from rotating. This locks the pipe angle, ensuring it remains constant during bending. After bending, the output end of the hydraulic cylinder 21 retracts, causing the tapered insert 28 to slide downwards along the tapered groove 24. At this point, the slide rod 26 slides inwards under its own weight and guided by the inclined slide groove 25. The rubber pad 27 disengages from the inner wall of the pipe, and the pipe is no longer fixed, allowing it to be removed from the surface of the central shaft 23, completing the positioning release step in the entire bending operation.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0035] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A precision positioning device for a high-efficiency automatic pipe bending machine, comprising a U-shaped plate (1) and a fixed seat (2), wherein the fixed seat (2) is rotatably mounted in the middle of the U-shaped plate (1), characterized in that: A hydraulic cylinder (21) is fixedly installed in the middle of the fixed base (2). A bracket (22) is fixedly installed at the upper end of the fixed base (2). A central shaft (23) is fixedly installed at the upper end of the bracket (22). A tapered insert (28) is slidably inserted into the middle of the central shaft (23). The output end of the hydraulic cylinder (21) passes through the middle of the bracket (22) and is fixedly connected to the bottom of the tapered insert (28). Multiple inclined sliding surfaces are evenly opened around the middle of the central shaft (23). The groove (25) and the multiple inclined sliding grooves (25) are connected to the conical groove (24). Multiple sliding rods (26) are uniformly slidably engaged in the middle of the inclined sliding groove (25). One end of the sliding rod (26) is engaged with the conical insert rod (28). A rubber pad (27) is fixedly installed at one end of each of the multiple sliding rods (26). The diameter of the rubber pad (27) is larger than the diameter of the inclined sliding groove (25). Fixed shafts (29) are fixedly installed at both ends of the fixed seat (2).

2. The precision positioning device for a high-efficiency automatic pipe bending machine according to claim 1, characterized in that: The other ends of the two fixed shafts (29) are respectively rotatably connected to the two sides of the middle part of the U-shaped plate (1).

3. The precision positioning device for a high-efficiency automatic pipe bending machine according to claim 2, characterized in that: One end of one of the fixed shafts (29) passes through the U-shaped plate (1) and is fixedly mounted with a gear one (14), and a gear two (15) is fixedly mounted on one side of the gear one (14).

4. The precision positioning device for a high-efficiency automatic pipe bending machine according to claim 3, characterized in that: The first gear (14) and the second gear (15) mesh with each other. A crank handle (16) is fixedly installed in the middle of the second gear (15). A cross slot (17) is opened in the middle of one end of the crank handle (16).

5. The precision positioning device for a high-efficiency automatic pipe bending machine according to claim 1, characterized in that: A sliding groove (18) is provided on one side of the U-shaped plate (1), and a limiting plate (19) is slidably engaged in the middle of the sliding groove (18).

6. The precision positioning device for a high-efficiency automatic pipe bending machine according to claim 5, characterized in that: One end of the limiting plate (19) engages with the tooth groove between every two adjacent teeth of the gear two (15).

7. The precision positioning device for a high-efficiency automatic pipe bending machine according to claim 1, characterized in that: Handles (13) are fixedly installed on both sides of the middle part of one end of the U-shaped plate (1).

8. The precision positioning device for a high-efficiency automatic pipe bending machine according to claim 1, characterized in that: A base (11) is fixedly installed at the lower end of the U-shaped plate (1), and casters (12) are fixedly installed at the four corners of the lower end of the base (11).

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