tube expander

Abstract

The utility model provides a kind of pipe expander, pipe expander includes: base;Carrying device, rotatably arranged on base;Clamping device, movably arranged on carrying device, clamping device includes at least two oppositely arranged clamping structures, at least two clamping structures are formed around and form clamping space between, clamping space size adjustably set, to be used for clamping first workpiece and second workpiece;Supporting device, including first support structure and second support structure, first support structure is arranged on carrying device, first support structure has the first support part for supporting first workpiece, second support structure has the second support part for supporting second workpiece;Wherein, along the width direction of clamping space, first support part is spaced apart from second support part, and second support part is located above first support part.The utility model effectively solves the problem of low work efficiency in the prior art of large drop two devices.

Description

Technical Field

[0001] This utility model relates to the field of tube expander technology, and more specifically, to a tube expander. Background Technology

[0002] Currently, with the widespread application of refrigeration equipment, the condenser and evaporator, as key components of refrigeration equipment, are also widely used. To meet consumers' requirements for the refrigeration performance of refrigeration equipment, manufacturers often increase the manufacturing method of the two components from a single row of parts to a method of splicing two or three rows of parts, in order to improve the working efficiency of the two components and thus improve the refrigeration performance of the refrigeration equipment.

[0003] In the existing technology, manufacturers typically use tube expanders to expand at least two rows of workpieces simultaneously in order to achieve the splicing of at least two rows of workpieces.

[0004] However, the above setup can only achieve the production of two-piece sets with no or small drop. Once large drop two-piece sets are produced, at least two rows of workpieces need to have a large height difference. Manufacturers need to expand the tubes of each row of workpieces separately and then splice the expanded rows of workpieces together with fasteners according to the height difference. The whole splicing process is quite cumbersome and reduces production efficiency. Utility Model Content

[0005] The main purpose of this utility model is to provide a tube expander to solve the problem of low working efficiency in the production of large drop tubes in the prior art.

[0006] To achieve the above objectives, this utility model provides a tube expander, comprising: a base; a supporting device rotatably mounted on the base; a clamping device movably mounted on the supporting device, the clamping device including at least two opposing clamping structures, the at least two clamping structures surrounding each other to form a clamping space, the size of the clamping space being adjustable for clamping a first workpiece and a second workpiece; and a supporting device including a first supporting structure and a second supporting structure, the first supporting structure being mounted on the supporting device, the first supporting structure having a first supporting portion for supporting the first workpiece, and the second supporting structure having a second supporting portion for supporting the second workpiece; wherein, along the width direction of the clamping space, the first supporting portion and the second supporting portion are spaced apart, and the second supporting portion is located above the first supporting portion.

[0007] Furthermore, the second support structure can be vertically mounted on the first support structure; or, the second support structure can be detachably connected to the first support structure.

[0008] Furthermore, the tube expander also includes a lifting drive device, which is drivenly connected to the second support structure to drive the second support structure to move toward or away from the first support structure; wherein, the first support structure is provided with an installation cavity, and the lifting drive device is installed in the installation cavity to drive the second support structure to move to a first position and a second position; when the second support structure is in the first position, at least a portion of the second support structure is located in the installation cavity; when the second support structure is in the second position, the bottom end of the second support structure abuts against the top end of the first support structure.

[0009] Furthermore, the first support structure has a first mating part, and the second support structure has a second mating part. One of the first mating part and the second mating part is a protrusion, and the other of the first mating part and the second mating part is a recess. The protrusion is inserted into the recess to engage with the recess.

[0010] Furthermore, the first support structure has a positioning recess, and the support device also includes a positioning structure. One end of the positioning structure is connected to the second support structure, and the other end of the positioning structure extends into the positioning recess to position the second support structure.

[0011] Furthermore, the support device also includes a fixing structure, which has an adjacent first fixing end and a second fixing end. The first fixing end is connected to the first support structure, and the second fixing end is connected to the second support structure. The extension direction of the first fixing end and the extension direction of the second fixing end are set at an angle.

[0012] Furthermore, the supporting device includes: a rotary worktable, mounted on a base; a supporting structure, mounted on the rotary worktable; and a supporting drive structure, driven and connected to the rotary worktable to drive the rotary worktable to rotate around a preset axis; wherein, there are at least two support devices, which are arranged opposite to each other on the rotary worktable and located on both sides of the supporting structure.

[0013] Furthermore, there are multiple clamping devices, which are divided into multiple groups. At least two groups of clamping devices are arranged on two opposite sides of the bearing structure. Each group of clamping devices includes multiple clamping devices, which are spaced apart on the bearing structure along a first preset direction.

[0014] Furthermore, the tube expander also includes a position detection device, which is mounted on the support structure. The detection device has a detection section facing the clamping device to detect the height of the first workpiece and the second workpiece.

[0015] Furthermore, the tube expander also includes: a receiving device disposed on the first support and the second support, the receiving device including a gripper structure having a closed position and an open position; when the gripper structure is in the closed position, the gripper structure clamps the first workpiece or the gripper structure clamps the second workpiece; when the gripper structure is in the open position, the gripper structure has a preset distance from the first workpiece or the gripper structure has a preset distance from the second workpiece.

[0016] Using the technical solution of this utility model, the supporting device of the tube expander is rotatably mounted on the base. The clamping device is movably mounted on the supporting device and includes at least two opposing clamping structures, forming a clamping space between them. The size of the clamping space is adjustable for clamping a first workpiece and a second workpiece. The supporting device includes a first support structure and a second support structure. The first support structure is mounted on the supporting device and has a first support portion for supporting the first workpiece, while the second support structure has a second support portion for supporting the second workpiece. The first and second support portions are spaced apart along the width of the clamping space, with the second support portion positioned above the first support portion. Thus, when workers need to produce two tubes with a large drop, they only need to place the first and second workpieces in the clamping space, and the clamping device clamps the first and second workpieces using the two clamping structures. At this time, the first support and the second support are used to support the first workpiece and the second workpiece, respectively. The first support and the second support are spaced apart along the width of the clamping space, so that the first workpiece and the second workpiece can be spaced apart. Since the second support structure is set on the first support structure and the second support is located above the first support, there is a certain height difference between the second support and the first support, which in turn creates a certain height difference between the second workpiece and the first workpiece. When the clamping space clamps the first workpiece and the second workpiece and expands the tube, the first workpiece and the second workpiece form a large drop device after expansion. This avoids the tedious steps of having workers expand the first workpiece and the second workpiece separately and then splice them together according to the height difference. It reduces the difficulty of operation for workers, improves their work efficiency, and increases production efficiency, thereby solving the problem of low work efficiency in the production of large drop devices in the prior art. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A perspective view of the overall structure of an embodiment of the tube expander according to the present invention is shown;

[0019] Figure 2 It shows Figure 1 Front view of the tube expander in the middle;

[0020] Figure 3 It shows Figure 1 Side view of the tube expander in the middle;

[0021] Figure 4 It shows Figure 1 A top view of the tube expander in the image;

[0022] Figure 5 It shows Figure 1 A three-dimensional structural view of the second support structure of the tube expander in the image;

[0023] Figure 6 It shows Figure 5 Top view of the second support structure in the middle;

[0024] Figure 7 It shows Figure 5 The main view of the second support structure in the middle;

[0025] Figure 8 It shows Figure 7 A cross-sectional view of the second support structure at point AA.

[0026] The above figures include the following reference numerals:

[0027] 1. First workpiece; 2. Second workpiece;

[0028] 10. Base;

[0029] 20. Supporting device; 21. Rotary worktable; 22. Supporting structure;

[0030] 30. Clamping device; 31. Clamping structure;

[0031] 40. Support device; 41. First support structure; 42. Second support structure; 421. Second mating part; 43. Positioning structure; 44. Fixing structure; 441. First fixing end; 442. Second fixing end;

[0032] 50. Receiving device; 51. First receiving device; 52. Second receiving device. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0035] In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0036] To address the problem of low efficiency in the production of large-drop double-electrode devices in the prior art, this application provides a tube expander.

[0037] like Figures 1 to 8 As shown, the tube expander includes a base 10, a bearing device 20, a clamping device 30, and a support device 40. The bearing device 20 is rotatably mounted on the base 10. The clamping device 30 is movably mounted on the bearing device 20 and includes at least two opposing clamping structures 31, which surround each other to form a clamping space. The size of the clamping space is adjustable for clamping a first workpiece 1 and a second workpiece 2. The support device 40 includes a first support structure 41 and a second support structure 42. The first support structure 41 is mounted on the bearing device 20 and has a first support portion for supporting the first workpiece 1. The second support structure 42 has a second support portion for supporting the second workpiece 2. The first support portion and the second support portion are spaced apart along the width direction of the clamping space, with the second support portion located above the first support portion.

[0038] Using the technical solution of this embodiment, the support device 20 of the tube expander is rotatably mounted on the base 10. The clamping device 30 is movably mounted on the support device 20, and includes at least two opposing clamping structures 31. A clamping space is formed between the at least two clamping structures 31, and the size of the clamping space is adjustable for clamping the first workpiece 1 and the second workpiece 2. The support device 40 includes a first support structure 41 and a second support structure 42. The first support structure 41 is mounted on the support device 20 and has a first support portion for supporting the first workpiece 1. The second support structure 42 has a second support portion for supporting the second workpiece 2. The first support portion and the second support portion are spaced apart along the width direction of the clamping space, with the second support portion located above the first support portion. Thus, when workers need to produce two large-drop tubes, they only need to place the first workpiece 1 and the second workpiece 2 in the clamping space, and the clamping device 30 clamps the first workpiece 1 and the second workpiece 2 using the two clamping structures 31. At this time, the first support and the second support are used to support the first workpiece 1 and the second workpiece 2 respectively. The first support and the second support are spaced apart along the width of the clamping space, so that the first workpiece 1 and the second workpiece 2 can be spaced apart. Since the second support structure 42 is set on the first support structure 41, the second support is located above the first support, so there is a certain height difference between the second support and the first support, and thus there is a certain height difference between the second workpiece 2 and the first workpiece 1. When the clamping space clamps the first workpiece 1 and the second workpiece 2 and expands the tube, the first workpiece 1 and the second workpiece 2 form a large drop device after expansion. This avoids the tedious steps of expanding the tubes of the first workpiece 1 and the second workpiece 2 separately and then splicing the first workpiece 1 and the second workpiece 2 according to the height difference. It reduces the difficulty of operation for the workers, improves the work efficiency of the workers, and increases the production efficiency, thereby solving the problem of low work efficiency in the production of large drop devices in the prior art.

[0039] In this embodiment, the first workpiece 1 includes a plurality of copper tubes arranged side by side, and the second workpiece 2 includes a plurality of copper tubes arranged side by side.

[0040] Optionally, the overall lengths of the first workpiece 1 and the second workpiece 2 are the same, or the overall lengths of the first workpiece 1 and the second workpiece 2 are not the same.

[0041] In this embodiment, the first support part is the end face of the first support structure 41 away from the base 10. The first support part is rectangular, and the clamping structure 31 is rectangular plate-shaped. The two clamping structures 31 are arranged opposite to each other so that the width direction of the clamping space is consistent with the width direction of the first support part.

[0042] In this embodiment, two clamping structures 31 are provided.

[0043] It should be noted that the number of clamping structures 31 is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the number of clamping structures 31 can be three, five, six, eight, or more.

[0044] In this embodiment, the second support structure 42 is movably mounted on the first support structure 41; or, the second support structure 42 is detachably connected to the first support structure 41. Thus, when the second support structure 42 is movably mounted on the first support structure 41, the distance between the second support portion and the first support portion can be adjusted, thereby adjusting the height difference between the second workpiece 2 and the first workpiece 1, forming two devices with different height differences, improving the versatility of the support structure, and consequently improving the versatility of the tube expander. Simultaneously, when the second support structure 42 is detachably connected to the first support structure 41, the operator can disassemble the second support structure 42 from the first support structure 41 and replace it with a second support structure 42 of different specifications, thereby adjusting the height difference between the second support portion and the first support portion, and consequently adjusting the height difference between the second workpiece 2 and the first workpiece 1, forming two devices with different height differences, improving the versatility of the support structure, and consequently improving the versatility of the tube expander.

[0045] Optionally, the tube expander further includes a lifting drive device, which is drivenly connected to the second support structure 42 to drive the second support structure 42 toward or away from the first support structure 41. The first support structure 41 has a mounting cavity, and the lifting drive device is installed within the mounting cavity to drive the second support structure 42 to a first position and a second position. When the second support structure 42 is in the first position, at least a portion of the second support structure 42 is located within the mounting cavity. When the second support structure 42 is in the second position, the bottom end of the second support structure 42 abuts against the top end of the first support structure 41. Thus, the lifting drive device located within the mounting cavity can drive the second support structure 42 toward or away from the first support structure 41. When the lifting drive device drives the second support structure 42 to the first position, at least a portion of the second support structure 42 is located within the mounting cavity, resulting in a height difference between the second support portion and the first support portion. When the lifting drive device drives the second support structure 42 to the second position, the second support structure 42 extends out of the mounting cavity, so that the bottom end of the second support structure 42 abuts against the top end of the first support structure 41, so that there is another range of height difference between the second support part and the first support part, which improves the tube expansion versatility of the tube expander and also improves the automation of height difference adjustment.

[0046] Optionally, such as Figure 5As shown, the first support structure 41 has a first mating portion, and the second support structure 42 has a second mating portion 421. One of the first and second mating portions 421 is a protrusion, and the other is a recess. The protrusion is inserted into the recess to engage with it. This interlocking engagement between the first mating portion of the first support structure 41 and the second mating portion 421 of the second support structure 42 allows the second support structure 42 to be detachably mounted on the first support structure 41, improving installation convenience, reducing the difficulty of disassembly and assembly, and increasing efficiency. Furthermore, the arrangement of the first and second mating portions 421 allows for more flexible and diverse processing to adapt to different working conditions and usage requirements, thus enhancing the processing flexibility of the workers.

[0047] In this embodiment, the first mating part is a protrusion, and the second mating part 421 is a recess. The first mating part is rod-shaped.

[0048] In other embodiments, the first mating portion is recessed, and the second mating portion 421 is protruding.

[0049] In this embodiment, the second support structure 42 is plate-shaped, and there are multiple first mating parts, which are spaced apart along the length of the second support structure 42. There are also multiple second mating parts 421, which are arranged in a one-to-one correspondence with the multiple first mating parts.

[0050] like Figure 5 and Figure 7 As shown, the first support structure 41 has a positioning recess, and the support device 40 also includes a positioning structure 43. One end of the positioning structure 43 is connected to the second support structure 42, and the other end of the positioning structure 43 extends into the positioning recess to position the second support structure 42. Thus, when the worker installs the second support structure 42, by inserting the positioning structure 43 into the positioning recess, the worker can ensure the accuracy of the installation of the second support structure 42, thereby ensuring the accuracy of the installation of the second workpiece 2, and consequently ensuring the accuracy of the tube expander's expansion. At the same time, the positioning structure 43 reduces the installation difficulty for the worker, improving installation efficiency and accuracy.

[0051] In this embodiment, the positioning structure 43 is a cylindrical pin.

[0052] In this embodiment, two positioning structures 43 are provided, and the two positioning structures 43 are arranged opposite to each other on the first support structure 41 to improve the installation accuracy of the workers.

[0053] It should be noted that the number of positioning structures 43 is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the number of positioning structures 43 can be three, five, six, eight, or more.

[0054] like Figure 2 , Figure 6 and Figure 8 As shown, the support device 40 also includes a fixing structure 44, which has an adjacent first fixing end 441 and a second fixing end 442. The first fixing end 441 is connected to the first support structure 41, and the second fixing end 442 is connected to the second support structure 42. The extension direction of the first fixing end 441 is set at an angle to the extension direction of the second fixing end 442. Thus, when the second support structure 42 is installed on the first support structure 41, the fixing structure 44 can assist in supporting the first support structure 41, preventing the second support structure 42 from tipping over due to external forces during operation. This improves the installation stability of the second support structure 42 and the expansion stability of the second workpiece 2, thereby improving the operational stability and reliability of the tube expander. Simultaneously, the angle between the extension direction of the first fixing end 441 and the extension direction of the second fixing end 442 ensures the reliability of the connection between the fixing structure 44 and the first and second support structures 41, while also ensuring the support stability of the second support structure 42 and the fixing reliability of the fixing structure 44.

[0055] In this embodiment, the extension direction of the first fixed end 441 is set at a 90° angle to the extension direction of the second fixed end 442.

[0056] like Figures 1 to 4 As shown, the supporting device 20 includes a rotary worktable 21, a supporting structure 22, and a supporting drive structure. The rotary worktable 21 is mounted on the base 10. The supporting structure 22 is mounted on the rotary worktable 21. The supporting drive structure is driven to the rotary worktable 21 to drive the rotary worktable 21 to rotate around a preset axis. At least two support devices 40 are provided, arranged opposite each other on the rotary worktable 21 and located on both sides of the supporting structure 22. With the two support devices 40 respectively positioned on both sides of the supporting structure 22, during the tube expander's expansion of the first workpiece 1 and the second workpiece 2, the supporting drive structure can drive the rotary worktable 21 to rotate. This ensures the continuity of the tube expander's operation and improves its production efficiency.

[0057] In this embodiment, two support devices 40 are provided.

[0058] It should be noted that the number of support devices 40 is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the number of support devices 40 may be three, five, six, eight, or more.

[0059] In this embodiment, as Figure 1 As shown, the bearing structure 22 is columnar and is vertically mounted on the rotary table 21, with its preset axis aligned with the axis of the bearing device 20.

[0060] In this embodiment, the load-bearing drive structure is a motor.

[0061] In this embodiment, the direction from the clamping device 30 to the bearing structure 22 is consistent with the width direction of the clamping space.

[0062] like Figures 1 to 3 As shown, there are multiple clamping devices 30, which are divided into multiple groups. At least two groups of clamping devices 30 are arranged on opposite sides of the supporting structure 22. Each group of clamping devices 30 includes multiple clamping devices 30, which are spaced apart on the supporting structure 22 along a first preset direction. In this way, at least two groups of clamping devices 30 are arranged in a one-to-one correspondence with at least two groups of support devices 40, so that the two clamping devices 30 can clamp the first workpiece 1 and the second workpiece 2 on the two support devices 40, ensuring the reliability of tube expansion of the first workpiece 1 and the second workpiece 2. At the same time, the arrangement of multiple clamping devices 30 spaced apart on the supporting structure 22 along the first preset direction increases the clamping area between the clamping devices 30 and the first workpiece 1 and the second workpiece 2, improves the clamping reliability of the clamping devices 30, and also makes the clamping devices 30 adaptable to first workpiece 1 and second workpiece 2 of different specifications and sizes, improving the versatility of the clamping devices 30 and the tube expander.

[0063] In this embodiment, the clamping device 30 is divided into two groups, and each group of clamping devices 30 includes two clamping devices 30.

[0064] In this embodiment, the first preset direction is consistent with the height direction of the supporting structure 22.

[0065] In this embodiment, the tube expander also includes a position detection device, which is mounted on the support structure 22. The detection device has a detection section facing the clamping device 30 to detect the height of the first workpiece 1 and the second workpiece 2. Thus, when the operator places the first workpiece 1 and the second workpiece 2 into the clamping space, the detection section of the detection device detects the height of the first workpiece 1 and the second workpiece 2 to monitor in real time whether their heights are consistent, ensuring the installation accuracy of the first workpiece 1 and the second workpiece 2 and improving the processing precision of the tube expander.

[0066] In this embodiment, the detection device is a laser displacement sensor.

[0067] like Figure 1 and Figure 3 As shown, the tube expander also includes a receiving device 50. The receiving device 50 is mounted on the first support and the second support. The receiving device 50 includes a gripper structure with a closed position and an open position. When the gripper structure is in the closed position, it grips either the first workpiece 1 or the second workpiece 2. When the gripper structure is in the open position, it maintains a preset distance from either the first workpiece 1 or the second workpiece 2. Thus, when the operator places the first workpiece 1 and the second workpiece 2 onto the first support structure 41 and the second support structure 42 respectively, the gripper structure of the receiving device 50 is in the closed position, clamping the first workpiece 1 and the second workpiece 2, ensuring the reliability of the support of the first and second support sections, and improving the installation stability and reliability of the first workpiece 1 and the second workpiece 2. Simultaneously, when the operator needs to remove the first workpiece 1 and the second workpiece 2 from the clamping space, the gripper structure is in the open position, releasing the first workpiece 1 and the second workpiece 2, ensuring smooth handling and improving work efficiency.

[0068] In this embodiment, the receiving device 50 disposed on the first support structure 41 is a first receiving device 51, and the receiving device 50 disposed on the second support structure 42 is a second receiving device 52. There are multiple first receiving devices 51, which are spaced apart along the length of the second support structure 42; and there are multiple second receiving devices 52, which are also spaced apart along the length of the second support structure 42.

[0069] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0070] The support device of the tube expander is rotatably mounted on the base. A clamping device is movably mounted on the support device and includes at least two opposing clamping structures forming a clamping space. The size of the clamping space is adjustable for clamping a first workpiece and a second workpiece. A support device includes a first support structure and a second support structure. The first support structure is mounted on the support device and has a first support portion for supporting the first workpiece, while the second support structure has a second support portion for supporting the second workpiece. The first and second support portions are spaced apart along the width of the clamping space, with the second support portion positioned above the first support portion. Thus, when the operator needs to produce two tubes with a large drop, only the first and second workpieces need to be placed in the clamping space, and the clamping device clamps the first and second workpieces using the two clamping structures. At this time, the first support and the second support are used to support the first workpiece and the second workpiece, respectively. The first support and the second support are spaced apart along the width of the clamping space, so that the first workpiece and the second workpiece can be spaced apart. Since the second support structure is set on the first support structure and the second support is located above the first support, there is a certain height difference between the second support and the first support, which in turn creates a certain height difference between the second workpiece and the first workpiece. When the clamping space clamps the first workpiece and the second workpiece and expands the tube, the first workpiece and the second workpiece form a large drop device after expansion. This avoids the tedious steps of having workers expand the first workpiece and the second workpiece separately and then splice them together according to the height difference. It reduces the difficulty of operation for workers, improves their work efficiency, and increases production efficiency, thereby solving the problem of low work efficiency in the production of large drop devices in the prior art.

[0071] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0072] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any 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 tube expander, characterized in that, include: Base (10); The support device (20) is rotatably mounted on the base (10); A clamping device (30) is movably disposed on the bearing device (20). The clamping device (30) includes at least two oppositely disposed clamping structures (31), and a clamping space is formed between the at least two clamping structures (31). The size of the clamping space is adjustable for clamping a first workpiece (1) and a second workpiece (2). The support device (40) includes a first support structure (41) and a second support structure (42). The first support structure (41) is disposed on the bearing device (20). The first support structure (41) has a first support portion for supporting the first workpiece (1), and the second support structure (42) has a second support portion for supporting the second workpiece (2). In the clamping space, the first support portion and the second support portion are spaced apart along the width direction, with the second support portion located above the first support portion.

2. The tube expander according to claim 1, characterized in that, The second support structure (42) is detachably mounted on the first support structure (41); or the second support structure (42) is detachably connected to the first support structure (41).

3. The tube expander according to claim 2, characterized in that, The tube expander also includes a lifting drive device, which is driven to connect with the second support structure (42) to drive the second support structure (42) to move toward or away from the first support structure (41); The first support structure (41) is provided with an installation cavity, and the lifting drive device is installed in the installation cavity to drive the second support structure (42) to move to a first position and a second position. When the second support structure (42) is in the first position, at least part of the second support structure (42) is located in the installation cavity. When the second support structure (42) is in the second position, the bottom end of the second support structure (42) abuts against the top end of the first support structure (41).

4. The tube expander according to claim 2, characterized in that, The first support structure (41) has a first mating part, and the second support structure (42) has a second mating part (421). One of the first mating part and the second mating part (421) is a protrusion, and the other of the first mating part and the second mating part (421) is a recess. The protrusion is inserted into the recess to engage with the recess.

5. The tube expander according to claim 1, characterized in that, The first support structure (41) has a positioning recess, and the support device (40) further includes a positioning structure (43). One end of the positioning structure (43) is connected to the second support structure (42), and the other end of the positioning structure (43) extends into the positioning recess to position the second support structure (42).

6. The tube expander according to claim 1, characterized in that, The support device (40) further includes a fixing structure (44), which has an adjacent first fixing end (441) and a second fixing end (442). The first fixing end (441) is connected to the first support structure (41), and the second fixing end (442) is connected to the second support structure (42). The extension direction of the first fixing end (441) is set at an angle to the extension direction of the second fixing end (442).

7. The tube expander according to claim 1, characterized in that, The supporting device (20) includes: A rotating worktable (21) is mounted on the base (10); A supporting structure (22) is provided on the rotary table (21); The supporting drive structure is connected to the rotary table (21) to drive the rotary table (21) to rotate around a preset axis; There are at least two support devices (40), and at least two support devices (40) are arranged opposite to each other on the rotary table (21) and located on both sides of the bearing structure (22).

8. The tube expander according to claim 7, characterized in that, There are multiple clamping devices (30), and the multiple clamping devices (30) are divided into multiple groups. At least two groups of clamping devices (30) are arranged on two opposite sides of the bearing structure (22). Each group of clamping devices (30) includes multiple clamping devices (30), and the multiple clamping devices (30) are arranged at intervals on the bearing structure (22) along a first preset direction.

9. The tube expander according to claim 8, characterized in that, The tube expander also includes a position detection device, which is mounted on the support structure (22). The detection device has a detection part, which is positioned toward the clamping device (30) to detect the height of the first workpiece (1) and the second workpiece (2).

10. The tube expander according to claim 1, characterized in that, The tube expander also includes: A receiving device (50) is disposed on the first support portion and the second support portion. The receiving device (50) includes a gripper structure having a closed position and an open position. When the gripper structure is in the closed position, the gripper structure clamps the first workpiece (1) or the gripper structure clamps the second workpiece (2). When the gripper structure is in the open position, the gripper structure has a preset distance from the first workpiece (1) or the gripper structure has a preset distance from the second workpiece (2).

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