Finned tube bending machine with double-shaft machine head

Abstract

The utility model relates to a finned tube bender with a double-shaft head, which comprises a roller head 10, a roller frame 20, a first shaft rod 31, a second shaft rod 32 and a driving shaft 40, the driving shaft 40 drives the roller head 10 to rotate, the roller head is provided with a first roller 11 and a second roller 12, the roller frame 20 is provided with a first shaft hole 21 and a second shaft hole 22, the first roller 11 is provided with a first roller shaft hole 11a, the second roller shaft hole 11a is provided with a second roller shaft hole 11b, and the second roller shaft hole 11a is provided with a second roller shaft hole 11c. The first rotating roller 12 is provided with a first rotating roller shaft hole 11a, the second rotating roller 12 is provided with a second rotating roller shaft hole 12a, a first shaft rod 31 penetrates into the first rotating roller shaft hole 11a to enable the rotating roller machine head 10 to rotate around the first shaft hole 21, and a second shaft rod 32 penetrates into the second rotating roller shaft hole 12a to enable the rotating roller machine head 10 to rotate around the second shaft hole 22. The first shaft rod and the second shaft rod serve as center shafts of the first rotating roller and the second rotating roller, the shaft rods are adopted to push the core shafts, the positions of the rotating shafts are fixed for the first rotating roller and the second rotating roller from the two ends, and the first rotating roller and the second rotating roller are accurate in positioning and stable in rotation.

Description

Technical Field

[0001] This utility model relates to a finned tube forming and processing device, and more particularly to a dual-axis finned tube bending machine. Background Technology

[0002] In large-scale refrigeration equipment, aluminum finned tubes are commonly used as heat exchangers (or evaporators). Single-piece aluminum alloy finned tube profiles can be bent to form a multi-bending and rotating heat dissipation fin structure, achieving good cooling performance in practical applications. Aluminum alloy finned tube profiles typically require bending in application to form a multi-bending and rotating structure, reducing and avoiding joint connections. Chinese invention patent (application number 2023113716911) discloses a reciprocating bending device for finned tube profiles, which reciprocates and bends the finned tube profiles to form an S-shaped multi-bending and rotating structure. In this technical solution, a roller drive slider is provided on the lower side of the roller frame. The roller drive slider can slide to positions corresponding to the first and second rollers respectively, driving the first and second rollers to rotate. In production practice, other technical solutions can be used as effective alternatives. Furthermore, to facilitate the bending and rotation of the finned tubes, in this technical solution, the finned tube support frame is installed on a circular track on the ground, which occupies a large amount of ground space and is relatively complex to install and debug. Utility Model Content

[0003] The purpose of this invention is to propose a dual-axis finned tube bending machine to provide more options for mechanized finned tube bending processing.

[0004] To achieve the above objectives, the technical solution of this utility model is: a dual-axis head finned tube bending machine, characterized in that it includes a rotating roller head 10, a rotating roller frame 20, a first shaft 31, a second shaft 32, and a drive shaft 40. The drive shaft 40 drives the rotating roller head 10 to rotate. The rotating roller head is provided with a first rotating roller 11 and a second rotating roller 12. The rotating roller frame 20 is provided with a first shaft hole 21 and a second shaft hole 22. The first shaft 31 is coaxial with the first shaft hole 21, and the second shaft 32 is coaxial with the second shaft hole 22. The first shaft 31 and the second shaft 32 are movable shafts that move axially. The first rotating roller 11 is provided with a first rotating roller shaft hole 11a, and the second rotating roller 12... A second roller shaft hole 12a is provided. When the first shaft 31 is inserted into the first roller shaft hole 11a, the roller head 10 rotates around the first shaft hole 21. When the second shaft 32 is inserted into the second roller shaft hole 12a, the roller head 10 rotates around the second shaft hole 22.

[0005] Furthermore, in order to achieve a reliable structural connection between the roller head and the roller frame, the roller frame 20 is provided with an upper frame plate 23 and a lower frame plate 24. The first shaft hole 21 passes through the upper frame plate 23 and the lower frame plate 24, and the second shaft hole 22 passes through the upper frame plate 23 and the lower frame plate 24. The axes of the first shaft hole 21 and the second shaft hole 22 are perpendicular to the upper frame plate 23 and the lower frame plate 24, and the roller head 10 is embedded between the upper frame plate 23 and the lower frame plate 24.

[0006] Furthermore, in order to reduce the rotational friction between the shaft and the shaft hole, the upper frame plate 23 and the lower frame plate 24 are provided with rotating bearings at the positions corresponding to the first shaft hole 21, where the first shaft hole 21 is a bearing hole. The upper frame plate 23 and the lower frame plate 24 are provided with rotating bearings at the positions corresponding to the second shaft hole 22, where the second shaft hole 22 is a bearing hole.

[0007] Furthermore, in order to shorten the operating stroke of the first and second shafts, a first spindle 13 is provided in the first roller shaft hole 11a, and a second spindle 14 is provided in the second roller shaft hole 12a. The first shaft 31 is inserted into the first roller shaft hole 11a from one end, and the first shaft 31 pushes the first spindle 13 out of the first roller shaft hole 11a from the other end and into the first shaft hole 21. The second shaft 32 is inserted into the second roller shaft hole 12a from one end, and the second shaft 32 pushes the second spindle 14 out of the second roller shaft hole 12a from the other end and into the second shaft hole 22.

[0008] Furthermore, in order to reset the first mandrel and the second mandrel along with the first shaft and the second shaft, a first reset spring 13a is provided in the first roller shaft hole 11a, and the first reset spring causes the first mandrel 13 to disengage from the first shaft hole 21; a second reset spring 14a is provided in the second roller shaft hole 12a, and the second reset spring causes the second mandrel 14 to disengage from the second shaft hole 22.

[0009] Furthermore, to form a structurally stable rotary head, the rotary head 10 is provided with a first head plate 15 and a second head plate 16. The first rotary roller 11 is provided with a first rotary roller shaft 11b, and the second rotary roller 12 is provided with a second rotary roller shaft 12b. The two ends of the first rotary roller shaft 11b are respectively fixed on the first head plate 15 and the second head plate 16, and the two ends of the second rotary roller shaft 12b are respectively fixed on the first head plate 15 and the second head plate 16. The first rotary roller shaft 11b is provided with a first rotary roller shaft hole 11a, and the second rotary roller shaft 12b is provided with a second rotary roller shaft hole 12a. The first head plate 15 is provided with a drive shaft hole 17, and the drive shaft 40 is connected to the drive shaft hole 17. The drive shaft hole 17 corresponds to the middle position of the center distance between the first rotary roller 11 and the second rotary roller 12.

[0010] Furthermore, a preferred first and second shaft drive structure is provided in which the roller frame 20 is provided with a first cylinder and a second cylinder, the first cylinder drives the first shaft 31 to move axially, and the second cylinder drives the second shaft 32 to move axially.

[0011] Furthermore, an optimized rotary roller head drive structure is provided, wherein the drive shaft 40 is connected to the drive motor 50, the drive shaft 40 is a universal joint, the drive shaft includes a first ball head 41, a second ball head 42 and a bushing rod 43, the first ball head 41 and the second ball head 42 are respectively disposed at both ends of the bushing rod 43, the first ball head 41 is connected to the drive motor 50, the second ball head 42 is connected to the drive shaft hole 17 of the rotary roller head 10, the two ends of the bushing rod 43 are respectively provided with waist grooves 44, and the first ball head and the second ball head are provided with pins 45 passing through the waist grooves 44.

[0012] Furthermore, to protect the safety of the rotating structure, the drive shaft 40 is connected to the drive motor 50 via a torque limiter 51.

[0013] Furthermore, in order to support the bending movement of the aluminum finned tube and reduce the floor space occupied, the roller frame 20 is installed on the tube bending machine frame 60, the tube bending machine frame 60 is provided with a rotary truss 70, the rotary truss 70 is installed on the tube bending machine frame 60 through a rotary column 71, the rotary column is driven to rotate by a rotary motor 72, the rotary truss 70 is provided with a hanging frame 73, the hanging frame 73 is provided with a hanging roller 74, and the rotary truss 70 rotates in coordination with the roller head 10.

[0014] The beneficial effects of this utility model are as follows: the first shaft and the second shaft are used as the central shafts of the first and second rollers, and the shafts drive the spindle to fix the positions of the first and second rollers from both ends, so that the first and second rollers are accurately positioned and rotate stably. The drive shaft with a universal joint structure drives the roller head to rotate around the double rotation center. The structure is simple and practical. The torque limiter can protect the safety of the rotating structure.

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the utility model;

[0017] Figure 2 This is an exploded view of the structure of the rotary roller head 10, rotary roller frame 20, first shaft 31, second shaft 32, drive shaft 40 and drive motor 50 of this utility model;

[0018] Figure 3 This is an exploded view of the structure of the rotary roller head 10 of this utility model;

[0019] Figure 4 This is a combined structural diagram of the roller head 10, roller frame 20, first shaft 31, second shaft 32, drive shaft 40 and drive motor 50 of this utility model. The first shaft 31 moves downward and the first shaft 31 and the first spindle 13 pass into the first shaft hole 21.

[0020] Figure 5 yes Figure 4 A cross-sectional view of the roller head 10 of the structure;

[0021] Figure 6 This is a schematic diagram of the drive motor 50 driving the rotating roller head 10 to rotate through the drive shaft 40. The rotating roller head 10 rotates around the first shaft hole 21.

[0022] Figure 7 This is a combined structural diagram of the roller head 10, roller frame 20, first shaft 31, second shaft 32, drive shaft 40 and drive motor 50 of this utility model. The second shaft 32 moves downward and the second shaft 32 and the second spindle 14 pass through the second shaft hole 22.

[0023] Figure 8 This is a schematic diagram of the drive motor 50 driving the rotating roller head 10 to rotate through the drive shaft 40. The rotating roller head 10 rotates around the second shaft hole 22.

[0024] Figure 9 This is a schematic diagram of the operation of this utility model. The aluminum finned tube 80 passes through the roller head 10 through the gap between the first roller 11 and the second roller 12.

[0025] Figure 10 This is a schematic diagram of the operation of this utility model. The roller head 10 rotates, the second roller 12 rotates around the first roller 11, and the aluminum finned tube 80 bends around the first roller 11.

[0026] Figure 11 This is a schematic diagram of the operation of this utility model. The rotating roller head 10 rotates in the opposite direction, and the second rotating roller 12 rotates back to the corresponding second shaft hole 22.

[0027] Figure 12 This is a schematic diagram of the operation of this utility model. The second shaft 32 moves downward, and the aluminum finned tube 80 is advanced forward a certain length through the gap between the first rotating roller 11 and the second rotating roller 12.

[0028] Figure 13 This is a schematic diagram of the operation of this utility model. The first shaft 31 moves upward, causing the first roller shaft 11b to disengage from the radial positioning. The first roller 11 rotates around the second roller 12, causing the aluminum finned tube 80 to bend around the second roller 12.

[0029] Figure 14 This utility model relates to an S-shaped aluminum finned tube with multiple bends and rotations.

[0030] Figure 15 This is a structural diagram of the present invention, which includes a feeding straightening machine 90, a feeding bridge 91 and a rotary truss 70. The aluminum finned tube 80 extends from the rotary roller head 10, and the hanging roller on one side of the rotary truss supports the aluminum finned tube 80 that passes through the rotary roller head 10.

[0031] Figure 16 yes Figure 15 Enlarged view of the roller head section;

[0032] Figure 17 This is a structural diagram of the present invention, which includes a feeding straightener 90, a feeding bridge 91, and a rotary truss 70. The rotating roller head 10 rotates, and the rotary truss 70 rotates in coordination with the rotating roller head 10.

[0033] Figure 18 This is a structural diagram of the present invention, which includes a feeding straightener 90, a feeding bridge 91 and a rotary truss 70. The feeding straightener 90 pushes the aluminum finned tube 80 again, and the aluminum finned tube 80 moves to the hanging roller on the other side.

[0034] Figure 19 This utility model is a structural diagram of a feeding straightening machine 90, a feeding bridge 91 and a rotary truss 70. The rotating roller head 10 rotates in the opposite direction to cause the aluminum finned tube 80 to bend for the second time. At the same time, the rotary truss 70 and the rotating roller head 10 rotate together, and the hanging roller keeps the aluminum finned tube in a supporting state. Detailed Implementation

[0035] Example 1:

[0036] like Figures 1 to 8 A dual-shaft finned tube bending machine includes a rotating roller head 10, a rotating roller frame 20, a first shaft 31, a second shaft 32, and a drive shaft 40.

[0037] The roller mill head is provided with a first roller 11 and a second roller 12, both of which have core tube grooves 18 corresponding to the core tubes of the aluminum finned tubes. The first roller 11 contains a first roller shaft 11b, which is rotatably connected to the first roller shaft 11b via a bearing 11c. The first roller shaft 11b contains a first roller shaft hole 11a. The second roller 12 contains a second roller shaft 12b, which is rotatably connected to the second roller shaft 12b via a bearing 12c. The second roller shaft 12b contains a second roller shaft hole 12a. The roller mill head 10 is provided with a first head plate 15 and a second head plate 16. The two ends of the first roller shaft 11b are respectively fixed to the first head plate 15 and the second head plate 16, and the two ends of the second roller shaft 12b are also respectively fixed to the first head plate 15 and the second head plate 16. The axes of the fixed first roller shaft 11b and the second roller shaft 12b are parallel to each other, and a gap is provided between the first roller 11 and the second roller 12, through which the aluminum finned tube can pass. In this embodiment, the first head plate 15 is disposed on the lower side of the first roller 11 and the second roller 12, and the second head plate 16 is disposed on the upper side of the first roller 11 and the second roller 12. The first head plate 15 is provided with a drive shaft hole 17, and a keyway is provided in the drive shaft hole 17 for connecting the drive shaft. The drive shaft hole 17 corresponds to the midpoint of the center distance between the first roller 11 and the second roller 12.

[0038] A first spindle 13 and a first return spring 13a are provided inside the first roller shaft hole 11a. The first spindle 13 slides in cooperation with the first roller shaft hole 11a at its lower end. The first return spring 13a is positioned between the first spindle 13 and the first roller shaft hole 11a at its upper end. A locking nut 13b is provided at the upper end of the first spindle. The first return spring 13a pushes the locking nut 13b upward, and the elastic force keeps the first spindle 13 in the upper position. At this time, the first spindle 13 is retracted into the first roller shaft hole 11a at its lower end, which is called the reset state of the first spindle. Figure 7 As shown.

[0039] Similarly, a second spindle 14 and a second return spring 14a are provided inside the second roller shaft hole 12a. The second spindle 14 slides in cooperation with the second roller shaft hole 12a at its lower end, and the second return spring 14a is positioned between the second spindle 14 and the second roller shaft hole 12a at its upper end. A locking nut 14b is provided at the upper end of the second spindle. The second return spring 14a pushes the locking nut 14b upward, and the elastic force keeps the second spindle 14 in the upper position. At this time, the second spindle 14 is retracted into the second roller shaft hole 12a at its lower end, which is called the reset state of the second spindle. Figure 5 As shown.

[0040] The roller frame 20 has an upper frame plate 23 and a lower frame plate 24, with the roller head 10 embedded between them. The upper frame plate 23 and the lower frame plate 24 have a first shaft hole 21 and a second shaft hole 22. The first shaft hole 21 is a through hole penetrating both the upper frame plate 23 and the lower frame plate 24, and the axes of the first shaft hole 21 and the second shaft hole 22 are perpendicular to the upper frame plate 23 and the lower frame plate 24. Rotary bearings are provided on the upper frame plate 23 and the lower frame plate 24 at positions corresponding to the first shaft hole 21, which is a bearing hole. Similarly, rotary bearings are provided on the upper frame plate 23 and the lower frame plate 24 at positions corresponding to the second shaft hole 22, which is a bearing hole. The axes of the first shaft hole 21 and the second shaft hole 22 are parallel to each other, and the center distance L1 of the first shaft hole 21 and the second shaft hole 22 is equal to the center distance L2 of the first rotating roller 11 and the second rotating roller 12.

[0041] The first shaft 31 is coaxial with the first shaft hole 21, and the second shaft 32 is coaxial with the second shaft hole 22. The first shaft 31 and the second shaft 32 are movable shafts that move axially. The roller frame 20 is equipped with a first cylinder 33 and a second cylinder 34.

[0042] The first cylinder 33 drives the first shaft 31 to move axially. When the first shaft 31 moves downward, it passes through the first shaft hole 21 (i.e., through the first shaft hole 21 of the upper frame plate 23) from the top end and then into the first roller shaft hole 11a. After entering the first roller shaft hole 11a, the first shaft 31 pushes the first spindle 13 downward. The first spindle 13 exits the first roller shaft hole 11a from the bottom end and enters the first shaft hole 21 (i.e., through the first shaft hole 21 of the lower frame plate 24). During the downward movement of the first spindle 13, the first return spring 13a is compressed. At this time, the upper and lower ends of the first roller shaft 11b are radially positioned by the first shaft 31 and the first spindle 13, respectively. If the second roller shaft 12b is not radially positioned, the roller head 10 can rotate around the first shaft hole 21, causing the second roller 12 to rotate around the first roller 11. Figure 4 , Figure 5 , Figure 6 As shown. When the first cylinder 33 drives the first shaft 31 to move upward, the first shaft 31 exits from the upper end of the first roller shaft hole 11a. Under the elastic restoring force of the first return spring 13a, the first spindle 13 disengages from the first shaft hole 21 and retracts from the lower end into the first roller shaft hole 11a. The upper and lower ends of the first roller shaft 11b are released from radial positioning, and the first roller 11 can move relative to the roller frame 20.

[0043] Similarly, the second cylinder 34 drives the second shaft 32 to move axially. When the second shaft 32 moves downward, it passes through the second shaft hole 22 (i.e., through the second shaft hole 22 of the upper frame plate 23) from the upper end and then into the second roller shaft hole 12a. After entering the second roller shaft hole 12a, the second shaft 32 pushes the second spindle 14 downward. The second spindle 14 passes out of the second roller shaft hole 12a from the lower end and into the second shaft hole 22 (i.e., through the second shaft hole 22 of the lower frame plate 24). During the downward movement of the second spindle 4, the second return spring 14a is compressed. At this time, the upper and lower ends of the second roller shaft 13b are radially positioned by the second shaft 32 and the second spindle 14, respectively. If the first roller shaft 11b is not radially positioned, the roller head 10 can rotate around the second shaft hole 22, causing the first roller 11 to rotate around the second roller 12. Figure 7 , Figure 8 As shown. When the second cylinder 34 drives the second shaft 32 to move upward, the second shaft 32 exits from the upper end of the second roller shaft hole 12a. Under the elastic restoring force of the second return spring 14a, the second spindle 14 disengages from the second shaft hole 22 and retracts from the lower end into the second roller shaft hole 12a. The upper and lower ends of the second roller shaft 12b are released from radial positioning, and the second roller 12 can move relative to the roller frame 20.

[0044] The drive shaft 40 drives the roller head 10 to rotate. One end of the drive shaft 40 is connected to the drive shaft hole 17 of the roller head 10, and the other end is connected to the drive motor 50 via a torque limiter 51. The drive shaft 40 is a universal joint, comprising a first ball joint 41, a second ball joint 42, and a bushing rod 43. The first ball joint 41 and the second ball joint 42 are respectively located at both ends of the bushing rod 43. The first ball joint 41 is connected to the torque limiter 51, which is directly connected to the drive motor 50. The second ball joint 42 is connected to the drive shaft hole 17 of the roller head 10 and has a flat key fixedly connected to the drive shaft hole 17. The bushing rod 43 has grooves 44 at both ends, and the first and second ball joints have pins 45 passing through the grooves 44.

[0045] When the first roller shaft 11b is radially positioned and the second roller shaft 12b is not radially positioned, the drive motor 50 drives the drive shaft 40 to rotate. Since the drive shaft 40 is a universal joint, the second ball joint 42 of the drive shaft 40 can rotate eccentrically, driving the roller head 10 to rotate, causing the second roller 12 to rotate around the first roller 11. Similarly, when the second roller shaft 12b is radially positioned and the first roller shaft 11b is not radially positioned, the drive motor 50 drives the drive shaft 40 to rotate, and the second ball joint 42 of the drive shaft 40 drives the roller head 10 to rotate, causing the first roller 11 to rotate around the second roller 12.

[0046] A torque limiter is used to protect the rotating structure. When the device experiences mechanical failure or misoperation, and the drive shaft 40 is overloaded, the drive shaft 40 will stop rotating, and the drive motor 50 will idle, thus protecting the roller head 10, roller frame 20, first shaft 31, second shaft 32, and drive shaft 40 from damage.

[0047] like Figures 9 to 12 As shown, in this embodiment, when the dual-shaft finned tube bending machine is working, firstly, both the first shaft 31 and the second shaft 32 move downwards, and both the first roller shaft 11b and the second roller shaft 12b are radially positioned, preventing the roller head 10 from rotating; the aluminum finned tube 80 passes through the gap between the first roller 11 and the second roller 12 through the roller head 10 and extends a certain length, such as... Figure 9 As shown.

[0048] Then, the second shaft 32 moves upward, causing the second roller shaft 12b to disengage from its radial positioning. The drive motor 50 drives the roller head 10 to rotate via the drive shaft 40. The second roller 12 rotates around the first roller 11, causing the aluminum finned tube 80 to bend around the first roller 11, forming a first bend 81. Figure 10 As shown.

[0049] Then, the drive motor 50 drives the roller head 10 to rotate in the opposite direction via the drive shaft 40, and the second roller 12 rotates back to the corresponding second shaft hole 22, as shown. Figure 11 As shown.

[0050] Then, the second shaft 32 moves downward, the second roller shaft 12b is radially positioned, and the aluminum finned tube 80 is advanced forward a certain length from the gap between the first roller 11 and the second roller 12, such as... Figure 12 As shown.

[0051] Then, the first shaft 31 moves upward, causing the first roller shaft 11b to disengage from its radial positioning. The drive motor 50 drives the roller head 10 to rotate via the drive shaft 40. The first roller 11 rotates around the second roller 12, causing the aluminum finned tube 80 to bend around the second roller 12, forming a second bend 82. Figure 13 As shown.

[0052] By repeating this process, multiple S-shaped aluminum finned tubes with bends and rotations can be produced, such as... Figure 14 As shown.

[0053] This utility model adopts a dual-axis operating structure with a first shaft 31 and a second shaft 32, and embeds the roller head 10 between the upper frame plate 23 and the lower frame plate 23. Compared with the original technology (Chinese Invention Patent 2023113716911), it achieves complete shaft hole fit and axial positioning between the roller and the shaft, and its structure is more stable and reliable. The drive shaft 40 with a universal joint structure effectively drives the roller head 10 to rotate eccentrically, realizing the reciprocating bending of the aluminum finned tube. The first shaft hole 21 and the second shaft hole 22 are bearing holes, which reduces the friction between the first shaft 31, the second shaft 32 and the roller frame. A first mandrel 13 is set in the first roller shaft hole 11a and a second mandrel 14 is set in the second roller shaft hole 12a, so that the first mandrel, the second mandrel and the first shaft and the second shaft are radially positioned at both ends of the first roller and the second roller, respectively. This can shorten the operating stroke of the first shaft and the second shaft, which is beneficial to the setting of the first cylinder 33 and the second cylinder 34.

[0054] The drive shaft 40 uses a first ball head 41, a second ball head 42, and a bushing rod 43 to form a compact universal joint structure, which can accommodate the small distance between the drive motor and the roller head.

[0055] Example 2:

[0056] like Figures 15 to 18 A dual-shaft finned tube bending machine is disclosed, employing the structure described in Embodiment 1: a rotating roller head 10, a rotating roller frame 20, a first shaft 31, a second shaft 32, and a drive shaft 40. The rotating roller frame 20 and the drive motor 50 are mounted on the bending machine frame 60.

[0057] A feeding straightener 90 is provided in the feeding direction of the roller head 10. A feeding bridge 91 is provided between the tube bending frame 60 and the feeding straightener 90. The feeding bridge 91 is provided with multiple finned tube guide wheels 92. The feeding straightener 90 pushes the aluminum finned tube 80 through the roller head 10, and the finned tube guide wheels 92 guide the aluminum finned tube in the direction of travel.

[0058] A slewing truss 70 is provided on the pipe bending machine frame 60. The slewing truss 70 is provided with a slewing column 71 and a hanging frame 73. The slewing truss 70 is located on one side of the upper part of the slewing column 71. The slewing truss is fixed to the slewing column 71 by a fixing frame 78. A tie rod 76 is provided between the top of the slewing column 71 and the slewing truss 70.

[0059] Multiple hangers 73 are provided along the slewing truss 70, distributed on both sides of the slewing truss 70. These hangers 73 are positioned in the middle, avoiding the bending machine frame 60 to prevent collisions during rotation. The hangers 73 have an L-shaped structure, with hanging rollers 74 installed at their lower ends. The hanging rollers 74 are horizontally positioned, corresponding to the lower edge of the aluminum finned tube 80, and support the aluminum finned tube 80 passing through the rotary head 10.

[0060] The slewing truss 70 is mounted on the pipe bending machine frame 60 via a slewing column 71. An external toothed slewing bearing 77 is installed on the pipe bending machine frame 60, and the slewing column 71 is fixed to the external toothed slewing bearing 77. The slewing motor 72 drives the external toothed slewing bearing 77 to rotate, thereby causing the slewing column to rotate. The axis of the slewing column 71 corresponds to the position between the roller head 10 and the roller head 10.

[0061] When the dual-shaft finned tube bending machine is working, the slewing truss 70 and the rotating roller head 10 rotate together.

[0062] like Figure 15 As shown, the feeding straightener 90 pushes the aluminum finned tube 80 through the roller head 10, and the hanging roller 74 (74a) on one side of the rotating truss lifts the aluminum finned tube 80 that passes through the roller head 10.

[0063] like Figure 16 As shown, the rotating roller head 10 rotates, causing the aluminum finned tube 80 to bend. At the same time, the rotating truss 70 rotates in coordination with the rotating roller head 10, and the hanging roller 74 (74a) maintains the state of supporting the aluminum finned tube.

[0064] like Figure 17 As shown, the feeding straightener 90 pushes the aluminum finned tube 80 again, and the aluminum finned tube 80 (along with the bent section) moves to the hanging roller 74 (74b) on the other side.

[0065] like Figure 18 As shown, the roller head 10 rotates again (rotation direction is the same as...). Figure 16 Conversely), causing the aluminum finned tube 80 to bend a second time, while the slewing truss 70 and the roller head 10 rotate together, and the hanging roller 74 (74b) keeps the aluminum finned tube in a supporting state.

[0066] This process is repeated to produce S-shaped aluminum finned tubes with multiple bends and rotations.

[0067] To clearly illustrate the operation of the device, Figure 17 , Figure 18 and Figure 19 The base of the pipe bending machine frame 60 is concealed. Figure 19 It also conceals the feed bridge 91.

[0068] This embodiment uses a slewing truss with a boom structure. Compared with the prior art (Chinese Invention Patent 2023113716911), the finned tube slewing frame that carries the finned tubes is installed on a circular track on the ground, which significantly reduces the ground space occupied by the device and makes the device easier to move, install and debug.

Claims

1. A dual-shaft finned tube bending machine, characterized in that, The device includes a roller head (10), a roller frame (20), a first shaft (31), a second shaft (32), and a drive shaft (40). The drive shaft (40) drives the roller head (10) to rotate. The roller head is provided with a first roller (11) and a second roller (12). The roller frame (20) is provided with a first shaft hole (21) and a second shaft hole (22). The first shaft (31) is coaxial with the first shaft hole (21), and the second shaft (32) is coaxial with the second shaft hole (22). The rod (31) and the second shaft (32) are movable shafts that move along the axial direction. The first roller (11) is provided with a first roller shaft hole (11a), and the second roller (12) is provided with a second roller shaft hole (12a). When the first shaft (31) passes through the first roller shaft hole (11a), the roller head (10) rotates around the first shaft hole (21). When the second shaft (32) passes through the second roller shaft hole (12a), the roller head (10) rotates around the second shaft hole (22).

2. The twin-shaft finned tube bending machine according to claim 1, characterized in that, The roller frame (20) is provided with an upper frame plate (23) and a lower frame plate (24). The first shaft hole (21) passes through the upper frame plate (23) and the lower frame plate (24), and the second shaft hole (22) passes through the upper frame plate (23) and the lower frame plate (24). The axes of the first shaft hole (21) and the second shaft hole (22) are perpendicular to the upper frame plate (23) and the lower frame plate (24). The roller head (10) is embedded between the upper frame plate (23) and the lower frame plate (24).

3. The dual-shaft finned tube bending machine according to claim 2, characterized in that, The upper frame plate (23) and the lower frame plate (24) are provided with rotating bearings at positions corresponding to the first shaft hole (21), where the first shaft hole (21) is a bearing hole. The upper frame plate (23) and the lower frame plate (24) are provided with rotating bearings at positions corresponding to the second shaft hole (22), where the second shaft hole (22) is a bearing hole.

4. The dual-shaft finned tube bending machine according to claim 1, characterized in that, A first spindle (13) is provided in the first roller shaft hole (11a), and a second spindle (14) is provided in the second roller shaft hole (12a). The first shaft (31) is inserted into the first roller shaft hole (11a) from one end, and the first shaft (31) pushes the first spindle (13) to pass out of the first roller shaft hole (11a) from the other end and enter the first shaft hole (21). The second shaft (32) is inserted into the second roller shaft hole (12a) from one end, and the second shaft (32) pushes the second spindle (14) to pass out of the second roller shaft hole (12a) from the other end and enter the second shaft hole (22).

5. The dual-shaft head finned tube bending machine according to claim 4, characterized in that, A first return spring (13a) is provided in the first roller shaft hole (11a), which causes the first spindle (13) to disengage from the first shaft hole (21); a second return spring (14a) is provided in the second roller shaft hole (12a), which causes the second spindle (14) to disengage from the second shaft hole (22).

6. The dual-shaft finned tube bending machine according to claim 1, characterized in that, The roller head (10) is provided with a first head plate (15) and a second head plate (16). The first roller (11) is provided with a first roller shaft (11b), and the second roller (12) is provided with a second roller shaft (12b). The two ends of the first roller shaft (11b) are respectively fixed on the first head plate (15) and the second head plate (16), and the two ends of the second roller shaft (12b) are respectively fixed on the first head plate (15) and the second head plate (16). The first roller shaft (11b) is provided with a first roller shaft hole (11a), and the second roller shaft (12b) is provided with a second roller shaft hole (12a). The first head plate (15) is provided with a drive shaft hole (17), and the drive shaft (40) is connected to the drive shaft hole (17). The drive shaft hole (17) corresponds to the middle position of the center distance between the first roller (11) and the second roller (12).

7. The twin-shaft finned tube bending machine according to claim 1, characterized in that, The roller frame (20) is equipped with a first cylinder (33) and a second cylinder (34). The first cylinder drives the first shaft (31) to move axially, and the second cylinder drives the second shaft (32) to move axially.

8. The twin-shaft finned tube bending machine according to claim 1, characterized in that, The drive shaft (40) is connected to the drive motor (50). The drive shaft (40) is a universal joint. The drive shaft includes a first ball head (41), a second ball head (42), and a bushing rod (43). The first ball head (41) and the second ball head (42) are respectively disposed at both ends of the bushing rod (43). The first ball head (41) is connected to the drive motor (50), and the second ball head (42) is connected to the drive shaft hole (17) of the roller head (10). The bushing rod (43) is provided with a waist groove (44) at both ends. The first ball head and the second ball head are provided with a pin (45) passing through the waist groove (44).

9. The dual-shaft head finned tube bending machine according to claim 8, characterized in that, The drive shaft (40) is connected to the drive motor (50) via a torque limiter (51).

10. The twin-shaft finned tube bending machine according to claim 1, characterized in that, The roller frame (20) is mounted on the pipe bending machine frame (60), and the pipe bending machine frame (60) is provided with a rotary truss (70). The rotary truss (70) is mounted on the pipe bending machine frame (60) through a rotary column (71). The rotary column is driven to rotate by a rotary motor (72). The rotary truss (70) is provided with a hanging frame (73), and the hanging frame (73) is provided with a hanging roller (74). The rotary truss (70) and the roller head (10) rotate together.

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