A condenser tube processing and bending machine

Abstract

This application provides a condenser tube processing and bending machine, belonging to the field of bending technology. The condenser tube processing and bending machine includes a base, on which a clamping mechanism is provided. The opening of the clamping mechanism has a groove adapted to the condenser tube, and pulleys are provided at the front end of the groove. The condenser tube abuts against two of the pulleys. A bending mechanism is provided on the base, which pushes the condenser tube into the clamping mechanism. A limiting mechanism is provided on the base to abut one end of the condenser tube. The bending mechanism includes an axially separable abutment wheel. This application has the following advantages: the clamping mechanism provides support on both sides, and the abutment wheel on the bending mechanism pushes the condenser tube along the two pulleys into the groove together with the abutment wheel, providing large-area support, reducing damage and deformation caused by excessive local stress. Furthermore, the abutment wheel can be axially separated, preventing the condenser tube from getting stuck and facilitating its removal.

Description

Technical Field

[0001] This application relates to the field of bending technology, and more specifically, to a bending machine for processing condenser tubes. Background Technology

[0002] As one of the most critical components of the condenser, the U-shaped tube requires a bending device during its forming process. The bending device can bend the copper tube into a U-shape, making it easier to install into the condenser.

[0003] In response, Chinese patent application number CN202421257587.X discloses a U-shaped copper tube bending device for a condenser. This solution mainly uses a movable frame, the two movable frames of which can be adjusted horizontally by rotating the second adjusting screw, thus supporting copper tubes of different lengths. The position of the movable frame is also adjustable, allowing for adjustable spacing between the two movable frames, thereby controlling the spacing on both sides of the copper tube after bending into a U-shape, making it convenient to use. With the addition of limiting plates, for copper tubes of different specifications, the spacing between the two limiting plates in the same groove can be adjusted by rotating the first adjusting screw, limiting the copper tube and preventing it from moving back and forth during bending, thus improving the stability of the copper tube bending. By setting a support tray, for bending shorter copper tubes, the second hydraulic cylinder can be used to raise the support tray, thus supporting the bottom of the copper tube after bending, avoiding over-bending due to the height of the movable frame, and effectively ensuring the forming rate of the copper tube bending.

[0004] However, in the process of implementing the technical solutions in the embodiments of this application, the inventors of this utility model discovered that the above-mentioned technology has at least the following technical problems:

[0005] The walls of the condenser tubes are relatively thin, and when they are pressed in, they lack guidance and support, making them prone to deformation or even damage. Utility Model Content

[0006] To overcome the above deficiencies, this application provides a condenser tube processing and bending machine, which aims to improve the problems mentioned in the background art.

[0007] This application provides a condenser tube processing and bending machine, including a base, a clamping mechanism on the base, a groove adapted to the condenser tube at the opening of the clamping mechanism, a pulley at the front end of the groove, and two pulleys abutting against the condenser tube. A bending mechanism is provided on the base, which pushes the condenser tube into the clamping mechanism. A limiting mechanism is provided on the base and abuts against one end of the condenser tube. The bending mechanism includes an axially separable abutment wheel.

[0008] In one specific implementation, the clamping mechanism includes a slide block that is slidably connected to the base via a dovetail joint. A support block is provided on the slide block, and the pulley is rotatably connected to one end of the support block. A groove is formed on the side of the support block.

[0009] In the above process, the support block is used to abut against the side wall of the condenser tube, and the groove is used to improve the fit, thereby providing sufficient support, reducing stress concentration, and effectively alleviating the deformation of the condenser tube during bending.

[0010] In one specific implementation, the support block is dovetail-connected to the slide block, the front end of the support block abuts against the slide block, and the pulley is rotatably connected to the rear end of the support block.

[0011] In the above implementation process, the support blocks adopt a dovetail insertion method for easy and quick replacement. After the condenser tube is placed on the two slides, the two support blocks will remain on the slides as the top bending mechanism exerts force. In this way, even without a fixed structure, the assembly relationship can be maintained. The groove and pulley on the support block are a whole and are available in multiple specifications to adapt to condenser tubes of different diameters to ensure the support effect.

[0012] In one specific embodiment, the clamping mechanism further includes a lead screw and a motor. The lead screw is rotatably connected to the base, the slide is threadedly connected to the lead screw, the motor is mounted on the base, and the output end of the motor is fixedly connected to the lead screw.

[0013] In the above process, the motor drives the double-ended lead screw to rotate, which in turn drives the two slides to separate and close.

[0014] In one specific implementation, the bending mechanism further includes a hydraulic cylinder and a wheel frame, the wheel frame being fixedly connected to the telescopic end of the hydraulic cylinder, the hydraulic cylinder being mounted on the base, and the abutment wheel being disposed on the wheel frame.

[0015] In the above implementation process, the hydraulic cylinder drives the abutment wheel on the wheel frame to push the condenser tube between the two support blocks to form a U-shaped tube. In this embodiment, the wheel frame and the base are also connected by a dovetail sliding connection to improve the stability of the wheel frame and its abutment wheel when it is pushed in.

[0016] In one specific implementation, a bushing is rotatably connected to the wheel frame, a pull rod is inserted into the bushing, an eccentric rod is hinged to the upper end of the pull rod, a stop wheel is sleeved on the pull rod, a retaining spring is provided at the lower end of the pull rod to abut against the lower end face of the stop wheel, the lower end of the eccentric rod abuts against the end face of the bushing, and the upper end face of the stop wheel abuts against the bushing.

[0017] In the above process, when the eccentric rod deflects, it pulls the tie rod, which in turn abuts the abutment wheel against the bushing, thereby fixing and rotating the abutment wheel. When the eccentric rod is loosened, the retaining spring and the tie rod move down, thereby releasing space and allowing the two parts of the abutment wheel to separate. Since the condenser tube will be stuck on the abutment wheel after it bends, and the larger the contact area between the abutment wheel and the condenser tube wall, the tighter it is stuck, this application adopts a separable abutment wheel, which achieves an anti-jamming effect under a large contact area, facilitates unloading, and effectively alleviates the bending and deformation of the condenser tube. The retaining spring makes it easy to replace abutment wheels of different specifications, improving the versatility of the device.

[0018] In one specific implementation, a spring is provided between the two parts of the abutment wheel.

[0019] In the above implementation process, after bending, since the abutment and the condenser tube are tightly clamped, it may be necessary to shake the condenser tube to separate the abutment. Shaking can easily cause damage or deformation to the condenser tube. Therefore, this application is equipped with a spring. When the eccentric rod is released, the spring will automatically open the two parts of the abutment, so that the condenser tube can be easily removed, avoiding the situation where the condenser tube needs to be shaken to separate the abutment.

[0020] In one specific implementation, the limiting mechanism includes an L-shaped scale and a set screw, the scale being slidably connected to the base, the set screw being screwed to the base, and the lower end of the set screw abutting against the scale.

[0021] In the above process, the scale position is adjusted according to the length of the condenser tube, and then the set screw is used to tighten and fix it. One end of the straight condenser tube is placed against the scale and rests against the two pulleys. As the pulleys push in, a U-shaped tube is formed, which makes it easy to bend condenser tubes of different lengths.

[0022] Compared with the prior art, the beneficial effects of this application are: the clamping mechanism forms support on both sides, and the abutment roller on the top bending mechanism pushes the condenser tube into the groove along the two pulleys together with the abutment roller, providing large-area support, reducing damage and deformation caused by excessive local stress, and the abutment roller can be separated axially to avoid jamming the condenser tube and make it easy to remove the condenser tube. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0024] Figure 1This is a schematic diagram of the state of the condenser tube processing and bending machine before bending, provided in the embodiments of this application;

[0025] Figure 2 A schematic diagram of the state of the condenser tube processing bending machine after bending, provided for the embodiments of this application;

[0026] Figure 3 A schematic diagram illustrating the connection relationship between the abutment wheel and the wheel frame provided for an embodiment of this application;

[0027] Figure 4 This is a schematic diagram illustrating the connection relationship between the abutment wheel and the spring, provided for an embodiment of this application.

[0028] In the diagram: 10-base; 20-condenser pipe; 30-clamping mechanism; 31-pulley; 32-slide block; 33-support block; 34-lead screw; 35-motor; 40-bending mechanism; 41-stop wheel; 42-hydraulic cylinder; 43-wheel frame; 44-shaft sleeve; 45-pull rod; 46-eccentric rod; 47-circlip; 48-spring; 50-limiting mechanism; 51-scale; 52-set screw. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0030] Please see Figures 1-4 This application provides a condenser tube bending machine, including a base 10, a clamping mechanism 30 on the base 10, a groove adapted to the condenser tube 20 at the opening of the clamping mechanism 30, a pulley 31 at the front end of the groove, and the condenser tube 20 abutting on the two pulleys 31. A bending mechanism 40 is provided on the base 10, which pushes the condenser tube 20 into the clamping mechanism 30. A limiting mechanism 50 is provided on the base 10 and abuts one end of the condenser tube 20. The bending mechanism 40 includes an axially separable abutment wheel 41. The clamping mechanism 30 provides support on both sides, and the abutment wheel 41 on the bending mechanism 40 pushes the condenser tube 20 along the two pulleys 31 into the groove together with the abutment wheel 41, providing large-area support and reducing damage and deformation caused by excessive local stress. Furthermore, the abutment wheel 41 can be axially separated, preventing the condenser tube 20 from being jammed and facilitating its removal.

[0031] Please see Figures 1-4 The clamping mechanism 30 includes a slide 32, which is slidably connected to the base 10 via a dovetail joint. A support block 33 is provided on the slide 32, and one end of the pulley 31 is rotatably connected to the support block 33. A groove is formed on the side of the support block 33. The support block 33 is used to abut against the side wall of the condenser tube 20. The groove improves the fit, thereby providing sufficient support, reducing stress concentration, and effectively alleviating the deformation of the condenser tube 20 during bending.

[0032] Please see Figures 1-4 The support block 33 is dovetail-inserted into the slide block 32, with the front end of the support block 33 abutting against the slide block 32. The pulley 31 is rotatably connected to the rear end of the support block 33. The support block 33 adopts a dovetail insertion method for easy and quick replacement. After the condenser tube 20 is placed on the two slide blocks 32, the two support blocks 33 will be held on the slide blocks 32 by the force of the top bending mechanism 40. In this way, even without a fixed structure, the assembly relationship can be maintained. The groove on the support block 33 and the pulley 31 are integrated and have multiple specifications to adapt to condenser tubes 20 of different diameters to ensure the support effect.

[0033] Please see Figures 1-4 The clamping mechanism 30 also includes a lead screw 34 and a motor 35. The lead screw 34 is rotatably connected to the base 10, and the slide 32 is threadedly connected to the lead screw 34. The motor 35 is mounted on the base 10, and the output end of the motor 35 is fixedly connected to the lead screw 34. The motor 35 drives the double-ended lead screw 34 to rotate, thereby driving the two slides 32 to separate and close.

[0034] Please see Figures 1-4 The bending mechanism 40 also includes a hydraulic cylinder 42 and a wheel frame 43. The wheel frame 43 is fixedly connected to the telescopic end of the hydraulic cylinder 42. The hydraulic cylinder 42 is mounted on the base 10, and the abutment wheel 41 is mounted on the wheel frame 43. The hydraulic cylinder 42 drives the abutment wheel 41 on the wheel frame 43 to push the condenser tube 20 between the two support blocks 33 to form a U-shaped tube. In this embodiment, the wheel frame 43 and the base 10 are also connected by a dovetail sliding connection to improve the stability of the wheel frame 43 and its abutment wheel 41 when they are pushed in.

[0035] Please see Figures 1-4 A bushing 44 is rotatably connected to the wheel frame 43. A pull rod 45 is inserted into the bushing 44. An eccentric rod 46 is hinged to the upper end of the pull rod 45. A stop wheel 41 is sleeved on the pull rod 45. A snap ring 47 is provided at the lower end of the pull rod 45 and abuts against the lower end face of the stop wheel 41. The lower end of the eccentric rod 46 abuts against the end face of the bushing 44. The upper end face of the stop wheel 41 abuts against the bushing 44. When the eccentric rod 46 deflects, it pulls the tie rod 45, which in turn abuts the abutment 41 against the bushing 44, thereby fixing and rotating the abutment 41. When the eccentric rod 46 is loosened, the retaining spring 47 and the tie rod 45 move down, thereby releasing space and allowing the two parts of the abutment 41 to separate. Since the condenser tube 20 will be stuck on the abutment 41 after the abutment 41 bends, and the larger the contact area between the abutment 41 and the tube wall of the condenser tube 20, the tighter it is stuck. Therefore, this application adopts a separable abutment 41, which achieves an anti-jamming effect under a large contact area, facilitates unloading, and effectively alleviates the bending and deformation of the condenser tube 20. The retaining spring 47 makes it easy to replace abutment 41 of different specifications, improving the versatility of the device.

[0036] Please see Figures 1-4A spring 48 is provided between the two parts of the abutment roller 41. After bending, because the abutment roller 41 is tightly locked to the condenser tube 20, it may be necessary to shake the condenser tube 20 to separate the abutment roller 41. However, shaking can easily damage or deform the condenser tube 20. Therefore, this application provides a spring 48. When the eccentric rod 46 is released, the spring 48 will automatically open the two parts of the abutment roller 41, so that the condenser tube 20 can be easily removed, avoiding the situation where the condenser tube 20 needs to be shaken to separate the abutment roller 41.

[0037] Please see Figures 1-4 The limiting mechanism 50 includes an L-shaped scale 51 and a set screw 52. The scale 51 is slidably connected to the base 10, and the set screw 52 is screwed to the base 10. The lower end of the set screw 52 abuts against the scale 51. The position of the scale 51 is adjusted according to the length of the condenser tube 20, and then the set screw 52 is used to tighten and fix it. A straight section of the condenser tube 20 is placed against the scale 51 and rests against the two pulleys 31. As the pulleys 41 are pushed in, a U-shaped tube is formed, which facilitates bending condenser tubes 20 of different lengths.

[0038] The working principle of this condenser tube bending machine is as follows: The position of the scale 51 is adjusted according to the length of the condenser tube 20. Then, the set screw 52 is used to tighten and fix it. Based on the radius to be bent, the motor 35 drives the lead screw 34 to rotate, which in turn drives the adjustment of the distance between the two support blocks 33. A straight section of the condenser tube 20 is placed against the scale 51 and rests against the two pulleys 31. The hydraulic cylinder 42 pushes the abutment roller 41 to push the condenser tube 20 along the two pulleys 31 into the space between the two support blocks 33, forming a U-shaped condenser tube 20. After bending, the electric... The machine 35 drives the two support blocks 33 to separate, and then the eccentric rod 46 is released. The spring 48 separates the abutment wheel 41 axially, and the bent condenser tube 20 can be easily removed. In summary, the clamping mechanism 30 forms support on both sides, and the abutment wheel 41 on the bending mechanism 40 pushes the condenser tube 20 into the groove along the two pulleys 31 together with the abutment wheel 41, providing large-area support and reducing damage and deformation caused by excessive local stress. Moreover, the abutment wheel 41 can be separated axially, avoiding jamming the condenser tube 20 and making it easy to remove the condenser tube 20.

[0039] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A condenser tube processing and bending machine, characterized in that, The device includes a base (10), on which a clamping mechanism (30) is provided. The opening of the clamping mechanism (30) is provided with a groove that is adapted to the condenser tube (20). A pulley (31) is provided at the front end of the groove. The condenser tube (20) is abutted on the two pulleys (31). A bending mechanism (40) is provided on the base (10). The bending mechanism (40) pushes the condenser tube (20) into the clamping mechanism (30). A limiting mechanism (50) is provided on the base (10) and abuts one end of the condenser tube (20). The bending mechanism (40) includes an axially separable abutment wheel (41).

2. The condenser tube processing and bending machine according to claim 1, characterized in that, The clamping mechanism (30) includes a slide (32), which is slidably connected to the base (10) with a dovetail. A support block (33) is provided on the slide (32), and the pulley (31) is rotatably connected to one end of the support block (33). A groove is formed on the side of the support block (33).

3. A condenser tube processing and bending machine according to claim 2, characterized in that, The support block (33) is dovetail-connected to the slide block (32), the front end of the support block (33) abuts against the slide block (32), and the pulley (31) is rotatably connected to the rear end of the support block (33).

4. A condenser tube processing and bending machine according to claim 3, characterized in that, The clamping mechanism (30) further includes a lead screw (34) and a motor (35). The lead screw (34) is rotatably connected to the base (10). The slide (32) is threadedly connected to the lead screw (34). The motor (35) is mounted on the base (10). The output end of the motor (35) is fixedly connected to the lead screw (34).

5. A condenser tube processing and bending machine according to claim 4, characterized in that, The bending mechanism (40) further includes a hydraulic cylinder (42) and a wheel frame (43). The wheel frame (43) is fixedly connected to the telescopic end of the hydraulic cylinder (42). The hydraulic cylinder (42) is mounted on the base (10). The abutment wheel (41) is mounted on the wheel frame (43).

6. A condenser tube processing and bending machine according to claim 5, characterized in that, A bushing (44) is rotatably connected to the wheel frame (43). A pull rod (45) is inserted into the bushing (44). An eccentric rod (46) is hinged to the upper end of the pull rod (45). A stop wheel (41) is sleeved on the pull rod (45). A snap ring (47) is provided at the lower end of the pull rod (45) and abuts against the lower end face of the stop wheel (41). The lower end of the eccentric rod (46) abuts against the end face of the bushing (44). The upper end face of the stop wheel (41) abuts against the bushing (44).

7. A condenser tube processing and bending machine according to claim 6, characterized in that, A spring (48) is provided between the two parts of the abutment wheel (41).

8. A condenser tube processing and bending machine according to claim 7, characterized in that, The limiting mechanism (50) includes an L-shaped scale (51) and a set screw (52). The scale (51) is slidably connected to the base (10), and the set screw (52) is screwed to the base (10). The lower end of the set screw (52) abuts against the scale (51).

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