Round expanding machine

Abstract

The utility model relates to a circle expanding machine, and belongs to the technical field of spray irrigation processing equipment. The device comprises a supporting mechanism, a driving mechanism, a circle expanding mechanism and a positioning mechanism, the fixed end of the driving mechanism is connected to the supporting mechanism, the circle expanding mechanism comprises a plurality of circle expanding assemblies, the circle expanding assemblies are in sliding connection with the supporting mechanism, the circle expanding assemblies are distributed in a radial shape with the driving mechanism as the circle center, and the positioning mechanism is arranged on the driving mechanism. The movable end of the driving mechanism is matched with the first ends of the multiple circle expanding assemblies and used for driving the circle expanding assemblies to horizontally move in the direction away from the driving mechanism, and the second end of the circle expanding mechanism is used for pushing the inner circumferential wall of a workpiece. The positioning mechanism is arranged on the supporting mechanism and used for being matched with the circle expanding mechanism so that a workpiece can be clamped between the positioning mechanism and the circle expanding mechanism. The square tube pressing device has the effect of improving the problem that the circumference of the square tube pressing reel is not good.

Description

Technical Field

[0001] This application relates to the field of sprinkler irrigation processing equipment technology, and in particular to a rounding machine. Background Technology

[0002] With the development of agricultural modernization, the requirements for the performance and appearance quality of sprinkler irrigation equipment are getting higher and higher. As one of the main components of sprinkler irrigation machines, the machining accuracy of the reel affects the overall performance and appearance of the product.

[0003] Currently, in related technologies, a roll bending machine is usually used to press square tubes, bending them into a circular structure. The circular structure is then used as a side wall, and a protective plate is placed on the circular structure to form a preliminary assembly of the reel.

[0004] However, the circles formed by the square tubes pressed by the roll bending machine are not regular and are prone to elliptical structures. As a result, when it is used with the guard plate, there will be a mismatch between the shape of the guard plate and the elliptical structure, resulting in the problem that the elliptical structure cannot be covered by the guard plate in some areas, which affects the appearance quality stability of the coil products produced in batches.

[0005] The aforementioned technologies suffer from the defect of poor circumference of the coil pressed by the square tube. Utility Model Content

[0006] In order to improve the problem of poor circumference of the coil pressed by square tubes, this application provides a rounding machine.

[0007] This application provides a circular expansion machine, which adopts the following technical solution:

[0008] An expanding machine includes: a support mechanism; a drive mechanism, the fixed end of which is connected to the support mechanism; an expanding mechanism comprising a plurality of expanding components slidably connected to the support mechanism, the plurality of expanding components being radially distributed around the drive mechanism as a center, the movable end of the drive mechanism cooperating with the first end of the plurality of expanding components to drive the expanding components to move horizontally away from the drive mechanism, the second end of the expanding mechanism being used to push the inner peripheral wall of the workpiece; and a positioning mechanism disposed on the support mechanism, the positioning mechanism cooperating with the expanding mechanism to clamp the workpiece between the positioning mechanism and the expanding mechanism.

[0009] By adopting the above technical solution, the support mechanism provides a stable installation foundation for the entire rounding expansion machine. The drive mechanism is fixed through its connection with the support mechanism and can drive several rounding expansion components of the rounding expansion mechanism to move horizontally, thereby working together to perform rounding expansion operations on the workpiece. The rounding expansion components are radially distributed with the drive mechanism as the center, ensuring uniform force transmission, making the workpiece more evenly stressed and avoiding local deformation. The positioning mechanism works in conjunction with the rounding expansion mechanism to clamp the workpiece between them, ensuring the stability of the workpiece during the rounding process, effectively alleviating the problems of irregular circles and elliptical deformation caused by poor circumference after workpiece processing, and improving the appearance quality and consistency of workpieces produced in batches.

[0010] Optionally, the driving mechanism includes a connector and a driving member. One end of the connector is connected to the support mechanism, and the other end of the connector is connected to the fixed end of the driving member. The support mechanism is provided with a clearance hole, and the movable end of the driving member is vertically inserted through the clearance hole, so that the vertical extension and retraction of the movable end of the driving member can drive several of the expanding assemblies to move away from the driving member.

[0011] By adopting the above technical solution, the connecting component of the drive mechanism connects the drive component to the support mechanism, allowing the movable end of the drive component to vertically pass through the clearance hole of the support mechanism. This design enables the vertical extension and retraction movement of the movable end of the drive component to effectively drive several rounding components to move away from the drive component, thereby achieving precise rounding operation on the workpiece and ensuring more stable and reliable adjustment of the workpiece's circumference.

[0012] Optionally, the rounding assembly includes a slider and a conversion component. The slider is slidably connected to the support mechanism, one end of the slider is connected to the conversion component, and the other end of the slider is used to push the workpiece. The conversion component is used to convert the vertical movement of the movable end of the drive component into the horizontal movement of the slider.

[0013] By adopting the above technical solution, the sliding connection between the slider and the support mechanism enables the horizontal movement of the rounding component, ensuring uniform pushing of the workpiece. The design of the conversion component, in cooperation with the drive component, converts the vertical movement of the drive component's movable end into the horizontal movement of the slider, thereby improving the accuracy and stability of the rounding process and further ensuring the adjustment effect of the workpiece's circumference.

[0014] Optionally, the conversion element has an arc, and the conversion elements of the plurality of the expanding components are arranged in a circle. The inner peripheral wall of the conversion element is provided with an inclined surface. The movable end of the driving element is provided with a pushing element. The vertical movement of the pushing element causes the plurality of conversion elements to separate relative to each other, so that the sliding element moves horizontally in a direction away from the axis of the driving element.

[0015] By adopting the above technical solution, the arc design of the conversion component allows multiple rounding components to be arranged in a circle, ensuring uniform force on the workpiece and improving the rounding accuracy. The inclined surface of the inner wall of the conversion component cooperates with the pusher at the moving end of the drive component, which can convert the vertical movement of the pusher into a horizontal component force applied to the inclined surface, thereby realizing the conversion of vertical movement into horizontal movement. This drives the sliding component to move away from the axis of the drive component, and the multiple sliding components expand relative to each other, achieving uniform rounding of the workpiece and improving the processing quality of the workpiece.

[0016] Optionally, the sliding member includes a sliding support portion and a sliding guide portion. One end of the sliding support portion is connected to the conversion member, and the other end of the sliding support portion is used to push the workpiece. The sliding guide portion is connected to the sliding support portion. The support mechanism is provided with a guide groove, and the sliding guide portion is slidably connected to the guide groove.

[0017] By adopting the above technical solution, the sliding support is connected to the conversion component and slides in the guide groove of the support mechanism through the sliding guide, which can ensure the stable movement of the sliding component in the horizontal direction, avoid the phenomenon of offset or jamming during the sliding process, and improve the reliability of the rounding; in addition, it can improve the uniformity of the force exerted on the workpiece by the rounding component, and further ensure the adjustment accuracy of the workpiece circumference.

[0018] Optionally, the sliding member includes a limiting part, the sliding guide part passes through the guide groove, the limiting part is located at the lower end of the sliding guide part, and the limiting part engages with the guide groove to restrict the vertical movement of the sliding support part.

[0019] By adopting the above technical solution, the limiting part can effectively prevent the sliding support from shifting vertically during horizontal movement, ensuring more stable and reliable movement of the sliding support. The cooperation between the guide groove and the limiting part further improves the overall movement accuracy of the sliding component, avoiding workpiece machining errors caused by vertical swaying, thereby improving the working efficiency and processing quality of the rounding machine.

[0020] Optionally, the slider includes a reset part, one end of which is connected to the sliding guide part, and the other end of which is connected to the support mechanism. The reset part is used to drive the sliding support part closer to the driving mechanism so that the sliding support part is reset.

[0021] By adopting the above technical solution, the reset part can effectively drive the sliding support part closer to the drive mechanism, realizing the automatic reset of the sliding support part after expansion. This design simplifies the operation process, improves the working efficiency of the equipment, and ensures the stability of the expansion component in the non-working state, avoiding equipment failure or safety hazards caused by improper positioning of the sliding part.

[0022] Optionally, it also includes a lifting mechanism, the fixed end of which is connected to the support mechanism, and the telescopic end of which is movably inserted through the support mechanism, the telescopic end of which is used to lift the workpiece.

[0023] By adopting the above technical solution, the lifting mechanism facilitates the removal of workpieces, improving the ease of operation of the rounding machine. Specifically, the telescopic end of the lifting mechanism can be movably inserted into the support mechanism, enabling it to lift the workpiece after the rounding operation, thus facilitating workpiece removal by the operator, reducing the workload of manually adjusting the workpiece position, and improving work efficiency.

[0024] Optionally, the positioning mechanism includes a plurality of positioning blocks, which are correspondingly arranged with the rounding component, and the side of the positioning block closest to the rounding component is provided with an arc.

[0025] By adopting the above technical solution, the positioning mechanism consists of several positioning blocks, each corresponding to a rounding component. The side of the positioning block closest to the rounding component is designed with a curved structure. This design allows the positioning blocks and the rounding component to better cooperate, ensuring uniform force on the workpiece during clamping, thereby improving the circumference adjustment accuracy of the workpiece. Simultaneously, the curved surface of the positioning blocks reduces damage to the workpiece surface, improving machining quality.

[0026] Optionally, the support mechanism includes a support platform and several support legs, the drive mechanism, the rounding mechanism and the positioning mechanism are all located on the support platform, and the several support legs are evenly distributed below the support platform.

[0027] By adopting the above technical solution, the support platform provides a stable mounting foundation for the drive mechanism, the rounding mechanism, and the positioning mechanism, ensuring that each component maintains a precise positional relationship during operation, thereby improving the stability and accuracy of the rounding operation. Several support legs are evenly distributed under the support platform, further enhancing the stability of the overall structure and preventing the equipment from tilting or being damaged due to uneven force during the rounding process. This also facilitates stable placement of the equipment under different ground conditions.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. By driving multiple rounding components to move horizontally through the drive mechanism, and cooperating with the positioning mechanism to clamp the workpiece, the workpiece circumference can be precisely adjusted, effectively alleviating the problem of poor workpiece circumference and improving the shape regularity of the reel;

[0030] 2. The rounding components are radially distributed with the drive mechanism as the center, ensuring that the force is applied evenly to the workpiece surface, thereby improving the adjustment accuracy and ensuring the stability of the appearance quality in batch production;

[0031] 3. The lifting mechanism facilitates unloading, and the overall structure is reasonably designed and easy to operate, which helps to improve processing efficiency. Attached Figure Description

[0032] Figure 1 This is a first-view schematic diagram of the rounding machine according to an embodiment of this application.

[0033] Figure 2 This is a second-view schematic diagram of the rounding machine according to an embodiment of this application.

[0034] Figure 3 This is a schematic diagram of the hidden conversion component of the rounding machine according to an embodiment of this application.

[0035] Figure 4 This is a schematic diagram of the conversion component according to an embodiment of this application.

[0036] Figure 5 This is a top view of the conversion component according to an embodiment of this application.

[0037] Figure 6 This is a schematic diagram of the cooperation between the driving component and the pushing component in an embodiment of this application.

[0038] Figure 7 This is a schematic diagram showing the cooperation of the sliding support, sliding guide, and reset parts in an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100. Workpiece;

[0041] 1. Support mechanism; 11. Support platform; 111. Clearance hole; 112. Guide slot; 12. Support leg;

[0042] 2. Drive mechanism; 21. Connecting component; 22. Drive component; 23. Pushing component;

[0043] 31. Expanding circle assembly; 3111. Sliding support part; 3112. Sliding guide part; 3113. Limiting part; 3114. Resetting part; 3115. Abutting part; 312. Converter; 3121. Inclined surface;

[0044] 4. Positioning mechanism; 41. Positioning block;

[0045] 5. Lifting mechanism. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7This application will be further described in detail below. In this embodiment, unless otherwise specified, "connection", "linking", and "fixing" are interpreted broadly, including fixed connection, detachable connection, connection to form an integral structure, mechanical connection, electrical connection, direct connection, indirect connection through an intermediary, internal connection, and interaction between two components, etc., and can be understood according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, in the description of this embodiment, terms such as "above," "below," "left," and "right," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are used only for ease of description and simplification of operation. They 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, and therefore should not be construed as a limitation of this application. Unless otherwise stated, directional terms such as "inner" and "outer" used in this application refer to the outline of the corresponding component itself.

[0048] like Figure 1 , Figure 2 and Figure 3 As shown in the embodiment of this application, a rounding machine is disclosed. The rounding machine includes a support mechanism 1, a drive mechanism 2, a rounding mechanism and a positioning mechanism 4, which is used to round a workpiece 100, such as a square tube, so as to improve the circumference of the workpiece 100 and thereby improve the appearance quality of the coil processed using the square tube.

[0049] like Figure 1 , Figure 2 and Figure 3 As shown, the support mechanism 1 provides a stable mounting base for the entire rounding machine. The rounding mechanism includes several rounding components 31, which are slidably connected to the support mechanism 1. The several rounding components 31 are radially distributed with the drive mechanism 2 as the center. The workpiece 100 is surrounded by the outer periphery of the rounding components 31, ensuring uniform force transmission and making the workpiece 100 more evenly stressed, thus avoiding local deformation. The fixed end of the drive mechanism 2 is connected to the support mechanism 1, and the movable end of the drive mechanism 2 cooperates with the first end of the several rounding components 31 to drive the rounding components 31 to move horizontally away from the axis of the drive mechanism 2. The second end of the rounding mechanism is used to push the inner peripheral wall of the workpiece 100. The positioning mechanism 4 is located on the support mechanism 1 and on the outer periphery of the rounding mechanism. It cooperates with the rounding mechanism to clamp the workpiece 100 between the positioning mechanism 4 and the rounding mechanism.

[0050] The drive mechanism 2 is fixed by connecting with the support mechanism 1 and can drive several expanding components 31 of the expanding mechanism to move horizontally, causing the expanding components 31 to move away from the axis of the drive mechanism 2. Thus, through the circumferential expansion of multiple expanding components 31, they work together to expand the workpiece 100. The positioning mechanism 4 cooperates with the expanding mechanism to clamp the workpiece 100 between them, ensuring the stability of the workpiece 100 during the expanding process and improving the expanding effect. This effectively alleviates the problems of irregularity and elliptical deformation caused by poor circumference after machining of the workpiece 100, improving the appearance quality and consistency of the workpieces 100 produced in batches.

[0051] like Figure 1 , Figure 2 and Figure 3 As shown, optionally, the support mechanism 1 includes a support platform 11 and several support legs 12. The drive mechanism 2, the rounding mechanism, and the positioning mechanism 4 are all located on the support platform 11. The support platform 11 provides a stable mounting base for the drive mechanism 2, the rounding mechanism, and the positioning mechanism 4, ensuring that each component maintains a precise positional relationship during operation, thereby improving the stability and accuracy of the rounding operation. The several support legs 12 are evenly distributed below the support platform 11, further enhancing the stability of the overall structure and preventing the equipment from tilting or being damaged due to uneven force during the rounding process.

[0052] like Figure 2 , Figure 3 and Figure 4 As shown, optionally, the drive mechanism 2 includes a connector 21 and a drive member 22. One end of the connector 21 is connected to the support mechanism 1, and the other end of the connector 21 is connected to the fixed end of the drive member 22. The support mechanism 1 is provided with a clearance hole 111, and the movable end of the drive member 22 is vertically inserted through the clearance hole 111, so that the vertical extension and retraction of the movable end of the drive member 22 can drive several rounding components 31 to move away from the drive member 22, thereby realizing the precise rounding operation of the workpiece 100 and ensuring that the adjustment of the circumference of the workpiece 100 is more stable and reliable.

[0053] like Figure 2 , Figure 3 and Figure 4 As shown, optionally, the rounding assembly 31 includes a slider and a converter 312. The slider is slidably connected to the support mechanism 1, one end of the slider is connected to the converter 312, and the other end of the slider is used to push the workpiece 100. The converter 312 is used to convert the vertical movement of the movable end of the drive member 22 into the horizontal movement of the slider, thereby improving the accuracy and stability of the rounding process and further ensuring the adjustment effect of the circumference of the workpiece 100.

[0054] like Figure 2 , Figure 4 and Figure 5As shown, optionally, the conversion element 312 has an arc, so that the conversion elements 312 of the plurality of expansion components 31 can be arranged in a circle, which is convenient for distribution around the movable end of the driving element 22. The inner peripheral wall of the conversion element 312 is provided with an inclined surface 3121, and the movable end of the driving element 22 is detachably provided with a pushing element 23. The inclined surface 3121 of the inner wall of the conversion element 312 cooperates with the pushing element 23 of the movable end of the driving element 22, which can convert the vertical moving force of the pushing element 23 into a horizontal component force applied to the inclined surface 3121. Thus, the vertical movement of the pushing element 23 drives the plurality of conversion elements 312 to be relatively dispersed, so that the sliding element moves horizontally in a direction away from the axis of the driving element 22. Through the relative expansion of the multiple sliding elements, the uniform expansion of the inner peripheral wall of the workpiece 100 is achieved, thereby improving the processing quality of the workpiece 100. In this embodiment, the inclined surface 3121 can make the upper end thickness of the conversion member 312 less than the lower end thickness, so that when the pusher 23 moves downward, the relative sliding between it and the inner peripheral wall of the conversion member 312 can drive the conversion member 312 to move horizontally away from the axis of the drive member 22. It should be noted that the axis of the drive mechanism 2 and the axis of the drive member 22 both refer to the axis of the telescopic end, which coincides with the axis of the pusher 23 and the axis of the support platform 11.

[0055] like Figure 3 , Figure 4 and Figure 6 As shown, the pusher 23 can be a circular ring structure, screwed to the telescopic end of the drive 22. The pusher 23 has circumferentially spaced notches for ventilation, alleviating negative pressure caused by the seal when the pusher 23 contacts the converter 312, ensuring smooth relative sliding between the pusher 23 and the converter 312, and allowing the expander to operate normally. The edges of the pusher 23 can be chamfered or rounded to make the fit between the pusher 23 and the converter 312 smoother.

[0056] like Figure 2 , Figure 4 and Figure 7 As shown, optionally, the sliding member includes a sliding support portion 3111 and a sliding guide portion 3112. One end of the sliding support portion 3111 is connected to the conversion member 312, and the other end of the sliding support portion 3111 is used to push the workpiece 100. The sliding guide portion 3112 is connected to the sliding support portion 3111. The support mechanism 1 is provided with a guide groove 112, and the sliding guide portion 3112 is slidably connected to the guide groove 112. By sliding the sliding guide portion 3112 within the guide groove 112 of the support mechanism 1, it can be ensured that the sliding member moves stably in the horizontal direction according to a preset direction, avoiding deviation or jamming during the sliding process, and improving the reliability of the rounding. Furthermore, the strict guidance of the rounding component 31 can improve the uniformity of the force applied to the workpiece 100, further ensuring the adjustment accuracy of the circumference of the workpiece 100.

[0057] Optionally, the sliding component includes a limiting part 3113, a sliding guide part 3112 passing through the guide groove 112, and the limiting part 3113 located at the lower end of the sliding guide part 3112. The limiting part 3113 engages with the guide groove 112 to restrict the vertical movement of the sliding support part 3111, effectively preventing vertical deviation of the sliding support part 3111 during horizontal movement and ensuring more stable and reliable movement of the sliding support part 3111. The cooperation between the guide groove 112 and the limiting part 3113 further improves the overall movement accuracy of the sliding component, avoids machining errors of the workpiece 100 caused by vertical swaying, and ensures that the force points of multiple sliding components on the workpiece 100 are on the same horizontal plane, thereby improving the working efficiency and processing quality of the rounding machine.

[0058] like Figure 2 , Figure 3 and Figure 7 As shown, optionally, the sliding member includes a reset part 3114. One end of the reset part 3114 is connected to the sliding guide part 3112, and the other end is connected to the support mechanism 1. The reset part 3114 is used to drive the sliding support part 3111 closer to the drive mechanism 2, thereby resetting the sliding support part 3111. This design simplifies the operation process, improves the working efficiency of the equipment, and ensures the stability of the expanding assembly 31 in the non-working state, avoiding equipment failure or safety hazards caused by improper positioning of the sliding member. Specifically, the reset part 3114 can be a spring.

[0059] like Figure 1 , Figure 2 and Figure 3 As shown, optionally, the sliding member includes an abutment portion 3115, which is connected to the end of the sliding support portion 3111 away from the drive mechanism 2. The abutment portion 3115 has an arc on the side away from the drive mechanism 2 to optimize the rounding effect on the workpiece 100.

[0060] like Figure 1 , Figure 2 and Figure 3 As shown, optionally, the positioning mechanism 4 consists of several positioning blocks 41, each corresponding to abutment portions 3115 of the expanding component 31. The side of the positioning block 41 closest to the expanding component 31 is designed with a curved structure. This design allows for better cooperation between the positioning block 41 and the abutment portion 3115 of the expanding component 31, ensuring uniform force on the workpiece 100 during clamping, thereby improving the circumference adjustment accuracy of the workpiece 100. Simultaneously, the curved surface of the positioning block 41 reduces damage to the surface of the workpiece 100, improving processing quality. The curvature of the abutment portion 3115 and the positioning block 41 can be set as needed, as long as it enables the expanding and fitting of the workpiece 100's circumference.

[0061] After the square tube is processed into a regular circle on the rounding machine, the excess square tube can be cut off and the joint can be welded to make the square tube form a stable circle.

[0062] like Figure 1 , Figure 2 and Figure 3 As shown, optionally, the rounding machine also includes a lifting mechanism 5. The fixed end of the lifting mechanism 5 is connected to the support mechanism 1, and the telescopic end of the lifting mechanism 5 is movably inserted through the support mechanism 1. The telescopic end of the lifting mechanism 5 is used to lift the workpiece 100. The lifting mechanism 5 facilitates the removal of the workpiece 100, improving the ease of operation of the rounding machine. Specifically, the telescopic end of the lifting mechanism 5 can be movably inserted through the support mechanism 1, enabling it to lift the workpiece 100 after the rounding operation, thus facilitating the removal of the workpiece 100 by the operator, reducing the workload of manually adjusting the position of the workpiece 100, and improving work efficiency. Several lifting mechanisms 5 can be provided, evenly distributed around the circumference of the drive component 22, to stably support the workpiece 100. Both the drive component 22 and the lifting mechanism 5 can be structures capable of extension and retraction, such as cylinders, hydraulic cylinders, or electric telescopic rods. The fixed end of the lifting mechanism 5 is connected to the support mechanism 1 through a support structure, the specific structure of which is not limited. The telescopic end of the lifting mechanism 5 extends vertically, and the support mechanism 1 is provided with a clearance through hole at the position of the workpiece 100 so that the telescopic end of the lifting mechanism 5 can pass through the clearance through hole to lift the workpiece 100.

[0063] It is understandable that the round expansion machine also includes necessary structures for connection, support, drive, positioning, limiting and control functions, so that the round expansion machine can operate normally; the shape, size, material and number of each part of the round expansion machine can be determined as needed, as long as it can achieve the corresponding function.

[0064] The implementation principle of a rounding machine according to an embodiment of this application is as follows: the support mechanism 1 provides a stable installation base for the entire rounding machine; the drive mechanism 2 is fixed by connecting with the support mechanism 1; the rounding components 31 are radially distributed with the drive mechanism 2 as the center; the drive mechanism 2 can drive several rounding components 31 of the rounding mechanism to move horizontally, thereby expanding the workpiece 100 through the expansion of multiple rounding components 31; the positioning mechanism 4 cooperates with the rounding mechanism to clamp the workpiece 100 between the two, ensuring the stability of the workpiece 100 during the rounding process, effectively alleviating the problem of irregular circles and elliptical deformation caused by poor circumference of the workpiece 100 after processing, thereby improving the appearance quality and consistency of the workpiece 100 produced in batches.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A circular expansion machine, characterized in that, include: Supporting structure (1); A drive mechanism (2), the fixed end of which is connected to the support mechanism (1); The expanding mechanism includes several expanding components (31), which are slidably connected to the support mechanism (1). The several expanding components (31) are radially distributed with the driving mechanism (2) as the center. The movable end of the driving mechanism (2) cooperates with the first end of the several expanding components (31) to drive the expanding components (31) to move horizontally away from the driving mechanism (2). The second end of the expanding mechanism is used to push the inner circumferential wall of the workpiece (100). Positioning mechanism (4) is provided on the support mechanism (1). The positioning mechanism (4) is used to cooperate with the expanding mechanism so that the workpiece (100) is clamped between the positioning mechanism (4) and the expanding mechanism.

2. The round expansion machine according to claim 1, characterized in that, The driving mechanism (2) includes a connector (21) and a driving member (22). One end of the connector (21) is connected to the support mechanism (1), and the other end of the connector (21) is connected to the fixed end of the driving member (22). The support mechanism (1) is provided with a clearance hole (111). The movable end of the driving member (22) is vertically inserted through the clearance hole (111), so that the vertical extension and retraction of the movable end of the driving member (22) can drive several of the expanding components (31) to move away from the driving member (22).

3. The round expansion machine according to claim 2, characterized in that, The expanding assembly (31) includes a slider and a conversion component (312). The slider is slidably connected to the support mechanism (1). One end of the slider is connected to the conversion component (312). The other end of the slider is used to push the workpiece (100). The conversion component (312) is used to convert the vertical movement of the moving end of the drive component (22) into the horizontal movement of the slider.

4. The round expansion machine according to claim 3, characterized in that, The conversion element (312) has an arc, and the conversion elements (312) of several of the expansion components (31) are arranged in a circle. The inner peripheral wall of the conversion element (312) is provided with an inclined surface (3121). The movable end of the driving element (22) is provided with a pusher (23). The vertical movement of the pusher (23) causes several of the conversion elements (312) to separate relative to each other, so that the sliding element moves horizontally in a direction away from the axis of the driving element (22).

5. The round expansion machine according to claim 3, characterized in that, The sliding member includes a sliding support (3111) and a sliding guide (3112). One end of the sliding support (3111) is connected to the conversion member (312), and the other end of the sliding support (3111) is used to push the workpiece (100). The sliding guide (3112) is connected to the sliding support (3111). The support mechanism (1) is provided with a guide groove (112), and the sliding guide (3112) is slidably connected to the guide groove (112).

6. The rounding machine according to claim 5, characterized in that, The sliding member includes a limiting part (3113), the sliding guide part (3112) passes through the guide groove (112), the limiting part (3113) is located at the lower end of the sliding guide part (3112), and the limiting part (3113) engages with the guide groove (112) to restrict the vertical movement of the sliding support part (3111).

7. The round expansion machine according to claim 5, characterized in that, The sliding member includes a reset part (3114), one end of which is connected to the sliding guide part (3112), and the other end of which is connected to the support mechanism (1). The reset part (3114) is used to drive the sliding support part (3111) closer to the drive mechanism (2) so that the sliding support part (3111) is reset.

8. The rounding machine according to claim 1, characterized in that, It also includes a lifting mechanism (5), the fixed end of which is connected to the support mechanism (1), and the telescopic end of which is movably inserted through the support mechanism (1). The telescopic end of the lifting mechanism (5) is used to lift the workpiece (100).

9. The rounding machine according to claim 1, characterized in that, The positioning mechanism (4) includes a plurality of positioning blocks (41), which are correspondingly arranged with the rounding component (31), and the positioning block (41) has an arc on the side close to the rounding component (31).

10. The rounding machine according to claim 1, characterized in that, The support mechanism (1) includes a support platform (11) and several support legs (12). The drive mechanism (2), the expansion mechanism and the positioning mechanism (4) are all located on the support platform (11), and the several support legs (12) are evenly distributed below the support platform (11).

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