Anti-indentation device for bending thin-walled metal pipe

Abstract

This invention discloses a device for preventing indentations during bending of thin-walled metal tubes, relating to the field of heat sink processing technology. It includes an operating table with a fixed column fixedly connected to its upper surface. A bending rolling roller is fitted onto the surface of the fixed column. A lower template is installed on the upper surface of the operating table. The device also includes a pressing device disposed on the upper surface of the operating table to prevent indentations from appearing on the surface of the heat sink during bending. The pressing device includes a pressing plate installed on the upper surface of the operating table. This device, by setting the pressing device, can press against the heat sink during the bending process of a laptop computer heat sink using a thin-walled metal tube bending device, thereby restricting the position of the heat sink and minimizing indentations on its surface during bending. This ensures the appearance and quality of the heat sink and maximizes its service life.

Description

Technical Field

[0001] This invention relates to the field of heat sink processing technology, specifically to a device for preventing indentation during bending of thin-walled metal tubes. Background Technology

[0002] During the production of laptops, heat sinks need to be installed inside to ensure the performance of the laptop during use. In order to maximize the heat dissipation area of ​​the heat sink inside the laptop, the heat sink usually needs to be bent, so as to increase the surface area of ​​the installed heat sink without compromising its integrity.

[0003] The aforementioned and existing related technologies often have the following drawbacks: In the existing technology, when using a metal tube bending device to bend the heat sink, due to the lack of restrictions on the position of the heat sink, indentations are often easily formed on its surface when bending the heat sink, which affects the appearance and quality of the heat sink.

[0004] Therefore, we propose a device to prevent indentation during bending of thin-walled metal tubes. Summary of the Invention

[0005] The purpose of this invention is to provide a device for preventing indentation during bending of thin-walled metal tubes, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for preventing indentations during bending of thin-walled metal tubes, comprising an operating table, a fixed column fixedly connected to the upper surface of the operating table, a bending rolling pressure roller fitted on the surface of the fixed column, and a lower template installed on the upper surface of the operating table; further comprising: a pressing device disposed on the upper surface of the operating table to prevent indentations from appearing on the surface of the heat sink during bending, the pressing device comprising a pressing plate installed on the upper surface of the operating table, two pressing grooves formed on the side of the pressing plate near the lower template, a block fixedly connected to the upper surface of the pressing plate, a sleeve plate fitted on the surface of the fixed column, the block tightly fitting against the inner wall of the sleeve plate, and the sleeve plate... The inner wall of the sleeve plate is slidably connected to two arc-shaped blocks; a positioning device is provided on the upper surface of the lower template for positioning the sleeve plate, the positioning device includes a sleeve rod fixedly connected to the upper surface of the lower template, the inner wall of the sleeve rod has two first sliding grooves, the surfaces of the two first sliding grooves on the sleeve rod are slidably connected to first sliders, and the sides of the two first sliders that are close to each other are fixedly connected to a sliding plate, the sliding plate being slidably connected to the inner wall of the sleeve rod; a limiting device is provided on both sides of the sleeve plate for disassembling the pressure plate, the limiting device includes two control rods respectively installed on both sides of the sleeve plate, the surfaces of the two control rods are fixedly connected to a top plate, and the surfaces of the two control rods are fixedly connected to a bottom plate.

[0007] The aforementioned components achieve the following effects: By setting up a pressure-retaining device, the heatsink can be pressed down during the bending process of the laptop heatsink using a thin-walled metal tube bending device, thereby restricting the position of the heatsink and minimizing surface indentations during bending, thus ensuring the appearance and quality of the heatsink and maximizing its lifespan; By setting up a positioning device, the lower template and fixing posts can position and fix the sleeve plate during the installation of the pressure plate, facilitating its installation and preventing movement during bending, thus ensuring the quality of the heatsink bending; By setting up a limiting device, the position of the arc-shaped block can be restricted when the pressure plate needs to be disassembled, minimizing interference from the arc-shaped block during disassembly, thus facilitating the disassembly operation.

[0008] Preferably, the pressing device further includes a rotating plate rotatably connected to the inner wall of the fixed column, the rotating plate being tightly fitted with the sleeve plate, and an arc-shaped rod being fixedly connected to the side of the rotating plate away from the pressing plate, the arc-shaped rod being slidably connected to the inner wall of the fixed column.

[0009] The effect achieved by the above components is that the rotating plate connected to the inner wall of the fixed column can rotate, and the position of the sleeve plate can be restricted by setting the rotating plate.

[0010] Preferably, a second spring is fitted onto the surface of the arc-shaped rod, and the two ends of the second spring are fixedly connected to the rotating plate and the fixed column, respectively.

[0011] The effect achieved by the above components is that the position of the second spring can be restricted by setting the arc-shaped rod, and the position of the rotating plate can be restricted by setting the second spring.

[0012] Preferably, each of the two arc-shaped blocks is fixedly connected to a pull rod on the side away from each other, and both pull rods are slidably connected to the inner wall of the sleeve plate. Each of the ends of the two pull rods away from the arc-shaped blocks is fixedly connected to a pull plate.

[0013] The above components achieve the following effects: by setting up the pull rod and pull plate, the position of the arc-shaped block can be easily adjusted, and by setting up the pull plate, the pull rod can be easily moved.

[0014] Preferably, a first spring is fitted onto the surface of the pull rod, and the two ends of the first spring are fixedly connected to the arc-shaped block and the sleeve plate, respectively.

[0015] The effect achieved by the above components is that by setting the first spring, the position of the arc-shaped block can be restricted, and at the same time, after the arc-shaped block moves, it can be guaranteed that it can return to its original position.

[0016] Preferably, an arc-shaped plate is fixedly connected to the inner wall of the fixed column, a limit rod is slidably connected to the inner wall of the arc-shaped plate, a circular plate is fixedly connected to the end of the limit rod away from the rotating plate, a third spring is sleeved on the surface of the limit rod, and the two ends of the third spring are fixedly connected to the arc-shaped plate and the circular plate respectively.

[0017] The above components achieve the following effects: by setting the arc-shaped plate, the limiting rod can be connected to the fixed column; by setting the circular plate, the third spring can be easily installed; by setting the third spring, the position of the limiting rod can be restricted; and by setting the limiting rod, the rotation of the rotating plate can be restricted.

[0018] Preferably, the positioning device further includes an insert rod slidably connected to the inner wall of the sleeve rod, with a first lifting plate fixedly connected to the end of the insert rod away from the slide plate, and a fourth spring sleeved on the surface of the insert rod, with the two ends of the fourth spring fixedly connected to the first lifting plate and the sleeve rod respectively.

[0019] The above components achieve the following effects: by setting the first lifting plate, the fourth spring can be easily installed; by setting the fourth spring, the position of the insert rod can be restricted; and by setting the insert rod, the position of the skateboard can be restricted when storing the skateboard.

[0020] Preferably, a connecting rod is slidably connected to the inner wall of the sleeve plate, and a second lifting plate is fixedly connected to the end of the connecting rod away from the slide plate. A fifth spring is sleeved on the surface of the connecting rod, and the two ends of the fifth spring are fixedly connected to the second lifting plate and the sleeve plate, respectively.

[0021] The above components achieve the following effects: by setting the fifth spring, a stable connection between the connecting rod and the sleeve plate can be ensured; by setting the connecting rod, the position of the slide plate can be restricted.

[0022] Preferably, the limiting device further includes two handles fixedly connected to the side of the abutment away from the top plate, and a second sliding groove is provided on both sides of the sleeve plate. A second slider is slidably connected to the surface of the second sliding groove on both sleeve plates, and the second slider is fixedly connected to the control rod.

[0023] The above components achieve the following effects: by providing a grip, the control lever can be moved easily; by providing a second slider, the control lever can be stably connected to the sleeve plate while still being able to move.

[0024] Preferably, a fixing rod is slidably connected to the inner wall of the second slider. The fixing rod is fixedly connected to the surface of the second slide groove on the sleeve plate. A sixth spring is sleeved on the surface of the fixing rod, and the two ends of the sixth spring are fixedly connected to the sleeve plate and the second slider, respectively.

[0025] The aforementioned components achieve the following effects: by setting a fixing rod, the position of the sixth spring can be restricted; by setting the sixth spring, the position of the second slider can be restricted.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. By setting up a pressing device, the present invention can press down on the heat sink during the bending process of the laptop heat sink using a thin-walled metal tube bending device, thereby restricting the position of the heat sink and minimizing the appearance of the heat sink surface during bending. This ensures the appearance and quality of the heat sink and maximizes its service life.

[0028] 2. By setting a positioning device, the present invention can position and fix the position of the sleeve plate during the installation of the pressure plate through the lower template and the fixing column. This can facilitate the installation of the pressure plate and at the same time ensure that the pressure plate does not move during the bending of the heat sink strip, thus ensuring the quality of the bending of the heat sink strip as much as possible.

[0029] 3. By setting a limiting device, the present invention can limit the position of the arc-shaped block when it is necessary to disassemble the pressure plate, thereby avoiding the situation where the arc-shaped block affects the disassembly of the pressure plate as much as possible, thus making the disassembly of the pressure plate as convenient as possible. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the present invention from another angle;

[0032] Figure 3 This is a schematic diagram of the structure of the fixing column of the present invention;

[0033] Figure 4 For the present invention Figure 3 A partial structural diagram;

[0034] Figure 5 For the present invention Figure 1 A partial structural diagram;

[0035] Figure 6 For the present invention Figure 2 Enlarged view of point A;

[0036] Figure 7 This is a schematic diagram of the arc-shaped block of the present invention;

[0037] Figure 8 For the present invention Figure 2A partial structural diagram;

[0038] Figure 9 This is an exploded structural diagram of the positioning device of the present invention;

[0039] Figure 10 This is a schematic diagram of the limiting device of the present invention.

[0040] In the diagram: 1-Operating table; 2-Bending rolling pressure roller; 3-Lower template; 4-Fixing column; 5-Pressure pressing device; 501-Pressure pressing plate; 502-Pressure pressing groove; 503-Sleeve plate; 504-Square block; 505-Arc-shaped block; 506-Pull rod; 507-Pull plate; 508-First spring; 509-Rotating plate; 510-Arc-shaped rod; 511-Second spring; 512-Arc-shaped plate; 513-Limiting rod; 51 4-Circular plate; 515-Third spring; 6-Positioning device; 61-Sleeve rod; 62-Slide plate; 63-Insertion rod; 64-First lifting plate; 65-Fourth spring; 66-Connecting rod; 67-Second lifting plate; 68-Fifth spring; 69-First slider; 7-Limiting device; 71-Control rod; 72-Top plate; 73-Support plate; 74-Handle; 75-Second slider; 76-Fixing rod; 77-Sixth spring. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Please see Figure 1-10This invention provides a technical solution: a device for preventing indentations during bending of thin-walled metal tubes, comprising an operating table 1, a fixed column 4 fixedly connected to the upper surface of the operating table 1, a bending rolling pressure roller 2 fitted on the surface of the fixed column 4, and a lower template 3 installed on the upper surface of the operating table 1. It also includes a pressing device 5 disposed on the upper surface of the operating table 1 to prevent indentations from appearing on the surface of the heat sink during bending. The pressing device 5 includes a pressing plate 501 installed on the upper surface of the operating table 1, two pressing grooves 502 formed on the side of the pressing plate 501 near the lower template 3, a block 504 fixedly connected to the upper surface of the pressing plate 501, a sleeve plate 503 fitted on the surface of the fixed column 4, the block 504 tightly fitting against the inner wall of the sleeve plate 503, and the inner wall of the sleeve plate 503 slidably connected. There are two arc-shaped blocks 505; a positioning device 6 is set on the upper surface of the lower template 3 for positioning the sleeve plate 503. The positioning device 6 includes a sleeve rod 61 fixedly connected to the upper surface of the lower template 3. The inner wall of the sleeve rod 61 has two first sliding grooves. The surfaces of the first sliding grooves on the two sleeve rods 61 are slidably connected to first sliders 69. The sides of the two first sliders 69 that are close to each other are fixedly connected to a sliding plate 62. The sliding plate 62 is slidably connected to the inner wall of the sleeve rod 61; a limiting device 7 is set on both sides of the sleeve plate 503 for disassembling the pressure plate 501. The limiting device 7 includes two control rods 71 ​​respectively installed on both sides of the sleeve plate 503. The surfaces of the two control rods 71 ​​are fixedly connected to a top plate 72 and a bottom plate 73. By setting the pressure-retaining device 5, the heat sink can be pressed during the bending process of the laptop heat sink using the thin-walled metal tube bending device, thereby restricting the position of the heat sink and minimizing indentations on its surface during bending, thus ensuring the appearance and quality of the heat sink and maximizing its service life. By setting the positioning device 6, the position of the sleeve plate 503 can be positioned and fixed by the lower template 3 and the fixing post 4 during the installation of the pressure plate 501, thereby facilitating the installation of the pressure plate 501 and preventing it from moving during the bending process, thus ensuring the quality of the heat sink bending. By setting the limiting device 7, the position of the arc-shaped block 505 can be restricted when the pressure plate 501 needs to be disassembled, minimizing the impact of the arc-shaped block 505 on the disassembly of the pressure plate 501, thus facilitating the disassembly operation of the pressure plate 501.

[0043] The following section will explain the specific configuration and function of its pressing device 5, positioning device 6, and limiting device 7.

[0044] like Figures 1-7As shown, the pressing device 5 also includes a rotating plate 509 rotatably connected to the inner wall of the fixed column 4. The rotating plate 509 is tightly fitted with the sleeve plate 503. An arc-shaped rod 510 is fixedly connected to the side of the rotating plate 509 away from the pressing plate 501, and the arc-shaped rod 510 is slidably connected to the inner wall of the fixed column 4. The rotating plate 509 rotatably connected to the inner wall of the fixed column 4 can rotate, and by setting the rotating plate 509, the position of the sleeve plate 503 can be restricted. A second spring 511 is sleeved on the surface of the arc-shaped rod 510, and the two ends of the second spring 511 are fixedly connected to the rotating plate 509 and the fixed column 4, respectively. By setting the arc-shaped rod 510, the position of the second spring 511 can be restricted, and by setting the second spring 511, the position of the rotating plate 509 can be restricted. Each of the two arc-shaped blocks 505 has a pull rod 506 fixedly connected to one side away from the other. Both pull rods 506 are slidably connected to the inner wall of the sleeve plate 503. Each end of the pull rod 506 away from the arc-shaped block 505 is fixedly connected to a pull plate 507. By setting the pull rods 506 and pull plates 507, the position of the arc-shaped blocks 505 can be easily adjusted, and the pull plates 507 can be easily moved.

[0045] A first spring 508 is fitted onto the surface of the pull rod 506, and the two ends of the first spring 508 are fixedly connected to the arc-shaped block 505 and the sleeve plate 503, respectively. By setting the first spring 508, the position of the arc-shaped block 505 can be restricted, and it can be ensured that the arc-shaped block 505 can return to its original position after it moves. An arc-shaped plate 512 is fixedly connected to the inner wall of the fixed column 4, and a limit rod 513 is slidably connected to the inner wall of the arc-shaped plate 512. A circular plate 514 is fixedly connected to the end of the limit rod 513 away from the rotating plate 509. A third spring 515 is fitted onto the surface of the limit rod 513, and the two ends of the third spring 515 are fixedly connected to the arc-shaped plate 512 and the circular plate 514, respectively. By setting the arc plate 512, the limiting rod 513 can be connected to the fixed column 4. By setting the circular plate 514, the third spring 515 can be easily installed. By setting the third spring 515, the position of the limiting rod 513 can be restricted. By setting the limiting rod 513, the rotation of the rotating plate 509 can be restricted.

[0046] like Figure 2 and Figure 8 as well as Figure 9 As shown, the positioning device 6 also includes an insert rod 63 slidably connected to the inner wall of the sleeve rod 61. A first lifting plate 64 is fixedly connected to one end of the insert rod 63 away from the slide plate 62. A fourth spring 65 is sleeved on the surface of the insert rod 63, and both ends of the fourth spring 65 are fixedly connected to the first lifting plate 64 and the sleeve rod 61, respectively. By setting the first lifting plate 64, the fourth spring 65 can be easily installed. By setting the fourth spring 65, the position of the insert rod 63 can be restricted. By setting the insert rod 63, the position of the slide plate 62 can be restricted when storing it.

[0047] A connecting rod 66 is slidably connected to the inner wall of the sleeve plate 503. A second lifting plate 67 is fixedly connected to the end of the connecting rod 66 away from the slide plate 62. A fifth spring 68 is sleeved on the surface of the connecting rod 66, and both ends of the fifth spring 68 are fixedly connected to the second lifting plate 67 and the sleeve plate 503, respectively. By setting the fifth spring 68, a stable connection between the connecting rod 66 and the sleeve plate 503 can be ensured. By setting the connecting rod 66, the position of the slide plate 62 can be restricted.

[0048] like Figure 1 and Figure 2 as well as Figure 5 and Figure 10 As shown, the limiting device 7 also includes two handles 74 fixedly connected to the side of the abutment plate 73 away from the top plate 72. Second sliding grooves are provided on both sides of the sleeve plate 503, and second sliders 75 are slidably connected to the surfaces of the second sliding grooves on both sleeve plates 503. The second sliders 75 are fixedly connected to the control rod 71. By providing the handles 74, the control rod 71 can be easily moved. By providing the second sliders 75, the control rod 71 can be stably connected to the sleeve plate 503 while still being able to move.

[0049] A fixing rod 76 is slidably connected to the inner wall of the second slider 75. The fixing rod 76 is fixedly connected to the surface of the second slide groove on the sleeve 503. A sixth spring 77 is sleeved on the surface of the fixing rod 76. The two ends of the sixth spring 77 are fixedly connected to the sleeve 503 and the second slider 75, respectively. By setting the fixing rod 76, the position of the sixth spring 77 can be restricted. By setting the sixth spring 77, the position of the second slider 75 can be restricted.

[0050] Working principle: Before processing the heat sink using the thin-walled metal tube bending device, the circular plate 514 is pulled to cause the limiting rod 513 to slide on the inner wall of the arc plate 512, causing the circular plate 514 to move away from the arc plate 512. The rotating plate 509 is rotated to cause the arc rod 510 to slide on the inner wall of the fixed column 4. At this time, the rotating plate 509 rotates closer to the limiting rod 513. The circular plate 514 is released, and under the action of the third spring 515, the limiting rod 513 moves closer to the rotating plate 509, restricting the position of the rotating plate 509. Then, the sleeve plate 503 is moved closer to the fixed column 4 on the operating table 1, and the circular plate 514 is pulled to cause the limiting rod 513 to move away from the rotating plate 509. At this time, under the action of the second spring 511, the rotating plate 509 rotates closer to the sleeve plate 503, restricting the position of the sleeve plate 503. The pressing plate 501 is moved to cause the square block 504 to move closer to the arc block 505. During the movement of block 504, the arc-shaped block 505 pushes the pull rod 506 to slide on the inner wall of the sleeve plate 503, and the pull plate 507 moves away from the sleeve plate 503. After block 504 moves away from arc-shaped block 505, under the action of the elastic force of the first spring 508, the pull plate 507 moves closer to the sleeve plate 503. Arc-shaped block 505 restricts the position of block 504. Then, the heat sink moves through the pressure groove 502 on the pressure plate 501, and the heat sink can be bent by the bending rolling pressure roller 2 and the lower template 3. By setting the pressure device 5, the heat sink can be pressed during the bending process of the laptop heat sink using the thin-walled metal tube bending device, thereby achieving the effect of restricting the position of the heat sink and avoiding indentations on its surface when bending the heat sink as much as possible, thus ensuring the appearance and quality of the heat sink as much as possible, and ensuring the service life of the heat sink as much as possible.

[0051] After installing the sleeve 503, pulling the first lifting plate 64 moves the insert rod 63 away from the slide plate 62, releasing the restriction on the position of the slide plate 62. Then, the slide plate 62 is moved closer to the fixed post 4, and the first lifting plate 64 is released. Under the action of the fourth spring 65, the first lifting plate 64 moves closer to the sleeve rod 61, pulling the second lifting plate 67 causes the connecting rod 66 to slide on the inner wall of the sleeve 503. The slide plate 62 continues to move, causing it to engage with the sleeve 503. The second lifting plate 67 is released, and under the action of the fifth spring 68, the connecting rod 66 moves closer to the slide plate 62, completing the connection between the slide plate 62 and the sleeve 503. To restrict the position of the sleeve plate 503, the first slider 69 is set to ensure that the connection between the slide plate 62 and the sleeve rod 61 is maintained while allowing the slide plate 62 to move. By setting the positioning device 6, the position of the sleeve plate 503 can be positioned and fixed by the lower template 3 and the fixing column 4 during the installation of the pressure plate 501. This allows the installation position of the pressure plate 501 to be positioned, which facilitates the installation of the pressure plate 501. At the same time, it can ensure that the pressure plate 501 does not move during the bending of the heat sink, thus ensuring the quality of the bending of the heat sink as much as possible.

[0052] When it is necessary to disassemble the pressure plate 501, first move the control lever 71 by holding the handle 74 to move the top plate 72 away from the pull plate 507. Then, pull the pull plate 507 to move the arc block 505 away from the square block 504, thereby releasing the restriction on the position of the pressure plate 501. Release the handle 74, and at this time, under the action of the elastic force of the sixth spring 77, the second slider 75 slides on the surface of the fixed rod 76, causing the pressure plate 73 to move closer to the pull plate 507, thus restricting the position of the pull plate 507. Then, move the pressure plate 501 away from the bending rolling pressure roller 2. By setting the limiting device 7, when it is necessary to disassemble the pressure plate 501, the position of the arc block 505 can be restricted, thus avoiding the situation where the arc block 505 affects the disassembly of the pressure plate 501 as much as possible, thereby facilitating the disassembly operation of the pressure plate 501 as much as possible.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing indentation during bending of thin-walled metal tubes, comprising an operating table (1), characterized in that: The upper surface of the operating table (1) is fixedly connected to a fixed column (4), and the surface of the fixed column (4) is fitted with a bending rolling pressure roller (2). The upper surface of the operating table (1) is equipped with a lower template (3), and also includes: A pressing device (5) is provided on the upper surface of the operating table (1) to prevent indentations from appearing on the surface of the heat sink when bending the heat sink. The pressing device (5) includes a pressing plate (501) installed on the upper surface of the operating table (1). Two pressing grooves (502) are opened on the side of the pressing plate (501) near the lower template (3). A block (504) is fixedly connected to the upper surface of the pressing plate (501). A sleeve plate (503) is fitted on the surface of the fixing column (4). The block (504) is tightly fitted to the inner wall of the sleeve plate (503). Two arc-shaped blocks (505) are slidably connected to the inner wall of the sleeve plate (503). A positioning device (6) is provided on the upper surface of the lower template (3) for positioning the sleeve plate (503). The positioning device (6) includes a sleeve rod (61) fixedly connected to the upper surface of the lower template (3). Two first sliding grooves are provided on the inner wall of the sleeve rod (61). A first slider (69) is slidably connected to the surface of the first sliding grooves on the two sleeve rods (61). A sliding plate (62) is fixedly connected to the side of the two first sliders (69) that are close to each other. The sliding plate (62) is slidably connected to the inner wall of the sleeve rod (61). Limiting devices (7) are provided on both sides of the sleeve plate (503) for disassembling the pressure plate (501). The limiting devices (7) include two control rods (71) respectively installed on both sides of the sleeve plate (503). A top plate (72) is fixedly connected to the surface of each of the two control rods (71), and a stop plate (73) is fixedly connected to the surface of each of the two control rods (71). Each of the two arc-shaped blocks (505) is fixedly connected to a pull rod (506) on the side away from each other. Both pull rods (506) are slidably connected to the inner wall of the sleeve plate (503). Each of the two pull rods (506) is fixedly connected to a pull plate (507) at the end away from the arc-shaped block (505). A connecting rod (66) is slidably connected to the inner wall of the sleeve plate (503). A second lifting plate (67) is fixedly connected to one end of the connecting rod (66) away from the sliding plate (62). A fifth spring (68) is sleeved on the surface of the connecting rod (66). The two ends of the fifth spring (68) are fixedly connected to the second lifting plate (67) and the sleeve plate (503) respectively.

2. The anti-indentation device for bending thin-walled metal tubes according to claim 1, characterized in that: The pressing device (5) further includes a rotating plate (509) rotatably connected to the inner wall of the fixed column (4). The rotating plate (509) is tightly fitted with the sleeve plate (503). An arc-shaped rod (510) is fixedly connected to the side of the rotating plate (509) away from the pressing plate (501). The arc-shaped rod (510) is slidably connected to the inner wall of the fixed column (4).

3. The thin-walled metal tube bending anti-indentation device according to claim 2, characterized in that: The surface of the arc-shaped rod (510) is fitted with a second spring (511), and the two ends of the second spring (511) are fixedly connected to the rotating plate (509) and the fixed column (4) respectively.

4. The anti-indentation device for bending thin-walled metal tubes according to claim 1, characterized in that: The surface of the pull rod (506) is fitted with a first spring (508), and the two ends of the first spring (508) are fixedly connected to the arc-shaped block (505) and the sleeve plate (503) respectively.

5. The anti-indentation device for bending thin-walled metal tubes according to claim 2, characterized in that: An arc-shaped plate (512) is fixedly connected to the inner wall of the fixed column (4). A limit rod (513) is slidably connected to the inner wall of the arc-shaped plate (512). A circular plate (514) is fixedly connected to one end of the limit rod (513) away from the rotating plate (509). A third spring (515) is sleeved on the surface of the limit rod (513). The two ends of the third spring (515) are fixedly connected to the arc-shaped plate (512) and the circular plate (514) respectively.

6. The anti-indentation device for bending thin-walled metal tubes according to claim 1, characterized in that: The positioning device (6) further includes an insert rod (63) slidably connected to the inner wall of the sleeve rod (61). The end of the insert rod (63) away from the slide plate (62) is fixedly connected to a first lifting plate (64). A fourth spring (65) is sleeved on the surface of the insert rod (63). The two ends of the fourth spring (65) are fixedly connected to the first lifting plate (64) and the sleeve rod (61) respectively.

7. The anti-indentation device for bending thin-walled metal tubes according to claim 1, characterized in that: The limiting device (7) also includes two handles (74) fixedly connected to the side of the abutment plate (73) away from the top plate (72). The two sides of the sleeve plate (503) are provided with second sliding grooves. The surfaces of the second sliding grooves on the two sleeve plates (503) are slidably connected with second sliders (75). The second sliders (75) are fixedly connected to the control rod (71).

8. The anti-indentation device for bending thin-walled metal tubes according to claim 7, characterized in that: The inner wall of the second slider (75) is slidably connected to a fixing rod (76), which is fixedly connected to the surface of the second groove on the sleeve plate (503). A sixth spring (77) is sleeved on the surface of the fixing rod (76), and the two ends of the sixth spring (77) are fixedly connected to the sleeve plate (503) and the second slider (75) respectively.

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