A bending machine for heat exchanger processing

Abstract

This utility model relates to the field of heat exchanger processing and discloses a bending machine for heat exchanger processing. It includes a support base, a support frame fixedly connected to the upper surface of the support base, a bending mechanism on the upper part of the support base, and a positioning component at the rear of the support base. The bending mechanism includes a fixing component, which includes a motor. The motor is located on the front surface of the support base, and a screw is fixedly connected to the output shaft of the motor. A connecting plate is threaded onto the outer wall of the screw. In this utility model, through the cooperation of the bending mechanism, the drive motor can clamp and fix heat exchange tubes of different sizes, facilitating subsequent extrusion and bending of the heat exchange tubes. Furthermore, when fixing multiple heat exchange tubes simultaneously, it ensures that the tubes have spacing and different axes, solving the problem that excessive length can obstruct bending when bending two coaxial heat exchange tubes, thus improving the applicability of the device.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger processing, and in particular to a bending machine for heat exchanger processing. Background Technology

[0002] Finned heat exchangers are among the most widely used devices in the field of gas-liquid heat exchange. Their core heat transfer efficiency depends on the structural design of the heat exchange tubes and fins. Copper tubes are the most commonly used heat exchange tube material for finned heat exchangers due to their excellent thermal conductivity. However, copper tubes need to be pressed into a certain curvature by a bending machine during processing to meet the usage requirements.

[0003] A search revealed Chinese Patent Publication No. CN221754415U, which discloses a bending machine for heat exchanger processing, belonging to the field of heat exchanger processing technology. The machine includes a support frame with an internal drive mechanism, a bending mechanism at the top, and several support plates with several sliding grooves. A sliding rod is fixed to the bottom of each support plate and slidably connected to the sliding groove. A groove is formed at the top of each support plate, and a first drive motor is mounted on its side. A first screw and a second screw are located in the groove, and a first bearing is fixed to their sidewalls. The first and second screws are threadedly aligned and connected by a first stop block, and both are threadedly connected to a first limiting block. The other end of the first screw is connected to the output end of the first drive motor. A straight rod is fixed to the first limiting block, and an arc-shaped block is fixed to the inner side of the top of each straight rod via a connecting rod. Using this bending machine, two copper tubes can be bent simultaneously, improving bending efficiency and meeting the high-efficiency bending requirements of enterprises.

[0004] Although the device has been improved to the point that it can bend two copper tubes at the same time, the two copper tubes are located on the same axis and some of the copper tubes are quite long. This causes the two copper tubes to block each other when placing and bending the copper tubes, making it impossible to complete the bending work and reducing the applicability of the device.

[0005] To address this problem, a bending machine for heat exchanger processing is proposed. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a bending machine for heat exchanger processing, which aims to improve the problem in the prior art that when bending two coaxial copper tubes, the copper tubes are too long and obstruct the bending process.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a bending machine for heat exchanger processing, comprising a support base, a support frame fixedly connected to the upper surface of the support base, a bending mechanism provided on the upper part of the support base, and a positioning component provided at the rear part of the support base;

[0008] The bending mechanism includes a fixing component, which includes a motor. The motor is disposed on the front surface of the support base. The output shaft of the motor is fixedly connected to a screw. A connecting plate is threadedly connected to the outer wall of the screw. A connecting rod is fixedly connected to the rear surface of the connecting plate. A positioning plate is fixedly connected to the rear surface of the connecting rod. A moving plate is slidably connected to the inner wall of the bottom end of the support base. A T-shaped block is fixedly connected to the rear surface of the positioning plate. A T-shaped groove is formed on the front surface of the moving plate. A sliding rod is fixedly connected to the upper surface of the moving plate. A clamping plate is fixedly connected to the upper surface of the sliding rod.

[0009] As a further description of the above technical solution:

[0010] The bending mechanism also includes a stamping assembly, which includes a hydraulic rod disposed on the lower surface of the support frame. A pressure plate is fixedly connected to the bottom end of the output shaft of the hydraulic rod, and a pressure block is fixedly connected to the lower surface of the pressure plate. A fixing block is fixedly connected to the upper surface of the support base, and the bottom end of the pressure block and the top end of the fixing block are engaged.

[0011] As a further description of the above technical solution:

[0012] The positioning component includes a baffle that is slidably connected to the rear surface of the support base. A roller is rotatably connected to the inner surface of the baffle. A through hole is opened through the upper surface of the baffle. An insert is elastically connected to the inner wall of the top of the support base by a compression spring. A lever is fixedly connected to the top of the right surface of the insert.

[0013] As a further description of the above technical solution:

[0014] The screw passes through and is rotatably connected to the front surface of the support base, and the positioning plate is slidably connected to the inner wall at the bottom of the support base.

[0015] As a further description of the above technical solution:

[0016] The left and right ends of the rear surface of the positioning plate are both set as inclined surfaces, and the inclined surfaces face opposite directions. The left end of the front surface of the moving plate is set as an inclined surface.

[0017] As a further description of the above technical solution:

[0018] The T-shaped groove is formed on the inclined surface of the front surface of the moving plate, the T-shaped block is fixedly connected to the inclined surface of the rear surface of the positioning plate, the T-shaped block is slidably connected to the inner wall of the T-shaped groove, and the rear surface of the T-shaped block is set as an arc surface.

[0019] As a further description of the above technical solution:

[0020] The slide bar passes through and is slidably connected to the upper surface of the support base, the clamp is arc-shaped, and the left side of the rear surface of the movable plate is convex.

[0021] As a further description of the above technical solution:

[0022] The lever is L-shaped and is slidably connected to the rear surface of the support base. The insert is inserted into the inner wall of the through hole and is slidably connected to the lower surface of the support base.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, with the cooperation of the bending mechanism, the drive motor can clamp and fix heat exchange tubes of different sizes, which facilitates the subsequent extrusion and bending of the heat exchange tubes. When multiple heat exchange tubes are fixed at the same time, it can ensure that there is a gap between the heat exchange tubes and that their axes are different. This solves the problem that when bending two coaxial heat exchange tubes, the tubes will be blocked due to excessive length, thus improving the applicability of the device.

[0025] 2. In this utility model, the positioning component can conveniently adjust the position of the baffle and accurately lock it through the cooperation of the toggle block, the insert block and the compression spring. The roller shaft and the rear end of the workpiece are positioned against each other to ensure that the bending length of different batches is consistent, and the bending length can be flexibly adjusted to improve the bending dimension accuracy. Attached Figure Description

[0026] Figure 1 This is a front view of the three-dimensional structure of the overall device in this utility model;

[0027] Figure 2 This is a three-dimensional cross-sectional view of the support base in this utility model;

[0028] Figure 3 This is a three-dimensional cross-sectional diagram of the positioning plate, the moving plate, and the T-shaped block in this utility model.

[0029] Figure 4 This is a three-dimensional structural breakdown diagram of the support frame and fixing block in this utility model;

[0030] Figure 5 This is a three-dimensional cross-sectional diagram of the support base and baffle in this utility model.

[0031] Legend:

[0032] 1. Support base; 2. Support frame; 31. Hydraulic rod; 32. Pressure plate; 33. Pressure block; 34. Fixing block; 41. Motor; 42. Screw; 43. Connecting plate; 44. Connecting rod; 45. Positioning plate; 46. Moving plate; 47. T-block; 48. T-slot; 49. Slide rod; 410. Clamping plate; 51. Baffle; 52. Roller shaft; 53. Through hole; 54. Compression spring; 55. Insert block; 56. Pulling block. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-2 The present invention provides an embodiment of a bending machine for heat exchanger processing, comprising a support base 1, with support feet fixed at the four corners of the lower surface of the support base 1 for supporting the overall device, a support frame 2 fixedly connected to the upper surface of the support base 1, the support frame 2 being U-shaped with the opening facing downwards, a bending mechanism for bending heat exchanger tubes and other components for heat exchanger processing provided on the upper part of the support base 1, and a positioning component for controlling the bending length of the heat exchanger tubes provided at the rear of the support base 1.

[0035] Reference Figures 1-3 The bending mechanism includes a fixing assembly, which includes a motor 41 for driving the screw 42 to rotate. The motor 41 is mounted on the front surface of the support base 1. The output shaft of the motor 41 is fixedly connected to the screw 42, which drives the connecting plate 43 to move back and forth. Both the motor 41 and the screw 42 are existing technologies and can be implemented by those skilled in the art. As they are existing technologies, they will not be described in detail in this case. The motor 41 can drive the screw 42 to rotate in the forward or reverse direction. The outer wall of the screw 42 is threadedly connected to the connecting plate 43. The rear surface of the connecting plate 43 is fixedly connected to the connecting rod 44. When the screw 42 rotates, it will drive the connecting plate 43 and the connecting rod 44 to move back and forth synchronously. The rear surface of the connecting rod 44 is fixedly connected to a positioning plate 45, and the inner wall of the bottom of the support base 1 is slidably connected to a moving plate 46. Multiple sets of the connecting rod 44, positioning plate 45 and moving plate 46 are provided, evenly distributed in the left and right direction, and each set of moving plates 46 has two, which are symmetrically distributed with the center line of the positioning plate 45. A T-shaped block 47 is fixedly connected to the rear surface of the positioning plate 45, and a T-shaped groove 48 is opened on the front surface of the moving plate 46. The T-shaped block 47 and the T-shaped groove 48 fit together. A sliding rod 49 is fixedly connected to the upper surface of the moving plate 46, and a clamping plate 410 for clamping and fixing components such as heat exchanger tubes is fixedly connected to the upper surface of the sliding rod 49.

[0036] Reference Figures 1-3 The screw 42 passes through and is rotatably connected to the front surface of the support base 1, which provides support for the screw 42. The positioning plate 45 is slidably connected to the inner wall at the bottom of the support base 1. The positioning plate 45 moves in the front and back direction. The left and right ends of the rear surface of the positioning plate 45 are both set as inclined surfaces, and the inclined surfaces face opposite directions. The left end of the front surface of the moving plate 46 is set as an inclined surface. The inclined surface of the rear surface of the positioning plate 45 corresponds to the inclined surface of the front surface of the moving plate 46. The T-shaped groove 48 is opened at the inclined surface of the front surface of the moving plate 46. The T-shaped block 47 is fixedly connected to the inclined surface of the rear surface of the positioning plate 45 and slidably connected to the T-shaped groove 48. When the T-shaped block 47 moves back and forth, it will squeeze the inner wall of the T-shaped groove 48, which will cause the moving plates 46 on both sides of the positioning plate 45 to open or close synchronously. The rear surface of the T-shaped block 47 is set as an arc surface to reduce friction and ensure that the T-shaped block 47 can slide smoothly. The slide rod 49 passes through and slides on the upper surface of the support base 1. The clamping plate 410 is set as an arc. When the clamping plate 410 closes, it can adapt to tubular objects of different diameters and can clamp and fix tubular objects of different diameters, which has strong practicality and applicability. The left side of the rear surface of the moving plate 46 is set as a protrusion.

[0037] Reference Figure 1 , Figure 4 The bending mechanism also includes a stamping assembly for stamping and bending tubular objects. The stamping assembly includes a hydraulic rod 31 for driving the pressure plate 32 and the pressure block 33 to move. The hydraulic rod 31 is prior art and can be implemented by those skilled in the art. Since it is prior art, it will not be described in detail in this case. The hydraulic rod 31 is set on the lower surface of the support frame 2. The bottom end of the output shaft of the hydraulic rod 31 is fixedly connected to the pressure plate 32. The lower surface of the pressure plate 32 is fixedly connected to the pressure block 33. The upper surface of the support 1 is fixedly connected to the fixing block 34. There are multiple sets of pressure blocks 33 and fixing blocks 34, which correspond to the positions of each set of positioning plates 45. The bottom end of the pressure block 33 and the top end of the fixing block 34 are engaged. During the engagement process, the tubular object placed on the fixing block 34 is squeezed.

[0038] Reference Figure 1 , Figure 4 , Figure 5The positioning component includes a baffle 51, which is slidably connected to the rear surface of the support base 1 and slides in the front-back direction. A roller 52 is rotatably connected to the inner surface of the baffle 51. The roller 52 is located at the upper position of the front surface of the baffle 51, and the baffle 51 at the position where the roller 52 is installed is an arc surface. The front end of the roller 52 protrudes from the front surface of the baffle 51. A through hole 53 is provided through the upper surface of the baffle 51. Multiple sets of through holes 53 are provided and are equidistantly distributed in the front-back direction. An insert block 55 is elastically connected to the inner wall of the top of the support base 1 through a compression spring 54. A lever block 56 is fixedly connected to the top of the right surface of the insert block 55. The insert block 55 and the lever block 56 will move synchronously.

[0039] Reference Figure 1 , Figure 4 , Figure 5 The lever 56 is L-shaped and is slidably connected to the rear surface of the support base 1. The lever 56 is easy to move. The insert 55 is inserted into the inner wall of the through hole 53 and is slidably connected to the lower surface of the support base 1. The bottom end of the insert 55 is arc-shaped to facilitate its insertion into the through hole 53. When the insert 55 moves upward, it will compress the spring 54 to generate a reaction force.

[0040] Working principle: First, move the lever 56 upwards, which will cause the insert 55 to move upwards. The insert 55 will disengage from the through hole 53, release the fixed state of the baffle 51, and squeeze the compression spring 54 to generate a reaction force. Then, slide the baffle 51 back and forth along the support base 1 and adjust its position according to the bending requirements. When it is adjusted to the appropriate position, release the lever 56. The reaction force of the compression spring 54 will push the lever 56 and the insert 55 downwards. The downward-moving insert 55 will be inserted into the through hole 53, limiting the position of the baffle 51.

[0041] Then, the tubular object to be bent is placed on the fixing block 34, and the rear end of the tubular object is brought into contact with the roller shaft 52. The tubular object is then held, and the motor 41 is started to drive the screw 42 to rotate. The rotating screw 42 will drive the connecting plate 43, connecting rod 44, and positioning plate 45 to move forward. The forward-moving positioning plate 45 will drive the T-shaped block 47 to move forward. The T-shaped block 47 will press against the inner wall of the T-shaped groove 48, thereby driving the moving plate 46 to move closer. When the moving plate 46 moves, it will drive the sliding rod 49 and clamping plate 410 to move closer synchronously to clamp and fix the tubular object to ensure stability.

[0042] Finally, the hydraulic rod 31 is activated to drive the pressure plate 32 and the pressure block 33 to move downward. Gradually, the pressure block 33 will move closer to the fixed block 34 to squeeze the tubular object and achieve bending. The bending length is the distance from the fixed block 34 to the roller 52. During the bending process, the raised end moves along the trajectory of the roller 52. The roller 52 can rotate to reduce friction.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bending machine for heat exchanger processing, comprising a support base (1), characterized in that: The upper surface of the support base (1) is fixedly connected to the support frame (2), the upper part of the support base (1) is provided with a bending mechanism, and the rear part of the support base (1) is provided with a positioning component. The bending mechanism includes a fixing component, which includes a motor (41). The motor (41) is disposed on the front surface of the support base (1). The output shaft of the motor (41) is fixedly connected to a screw (42). The outer wall of the screw (42) is threadedly connected to a connecting plate (43). The rear surface of the connecting plate (43) is fixedly connected to a connecting rod (44). The rear surface of the connecting rod (44) is fixedly connected to a positioning plate (45). The inner wall of the bottom end of the support base (1) is slidably connected to a moving plate (46). The rear surface of the positioning plate (45) is fixedly connected to a T-shaped block (47). The front surface of the moving plate (46) is provided with a T-shaped groove (48). The upper surface of the moving plate (46) is fixedly connected to a sliding rod (49). The upper surface of the sliding rod (49) is fixedly connected to a clamping plate (410).

2. A bending machine for heat exchanger processing according to claim 1, characterized in that: The bending mechanism also includes a stamping assembly, which includes a hydraulic rod (31). The hydraulic rod (31) is disposed on the lower surface of the support frame (2). A pressure plate (32) is fixedly connected to the bottom end of the output shaft of the hydraulic rod (31). A pressure block (33) is fixedly connected to the lower surface of the pressure plate (32). A fixing block (34) is fixedly connected to the upper surface of the support base (1). The bottom end of the pressure block (33) and the top end of the fixing block (34) are engaged.

3. A bending machine for heat exchanger processing according to claim 1, characterized in that: The positioning component includes a baffle (51), which is slidably connected to the rear surface of the support base (1). A roller (52) is rotatably connected to the inner surface of the baffle (51). A through hole (53) is provided on the upper surface of the baffle (51). An insert (55) is elastically connected to the inner wall of the top of the support base (1) by a compression spring (54). A lever (56) is fixedly connected to the top of the right surface of the insert (55).

4. A bending machine for heat exchanger processing according to claim 1, characterized in that: The screw (42) passes through and is rotatably connected to the front surface of the support base (1), and the positioning plate (45) is slidably connected to the inner wall at the bottom of the support base (1).

5. A bending machine for heat exchanger processing according to claim 1, characterized in that: The left and right ends of the rear surface of the positioning plate (45) are both set as inclined surfaces, and the inclined surfaces face opposite directions. The left end of the front surface of the moving plate (46) is set as an inclined surface.

6. A bending machine for heat exchanger processing according to claim 1, characterized in that: The T-shaped groove (48) is opened on the inclined surface of the front surface of the moving plate (46), the T-shaped block (47) is fixedly connected to the inclined surface of the rear surface of the positioning plate (45), the T-shaped block (47) is slidably connected to the inner wall of the T-shaped groove (48), and the rear surface of the T-shaped block (47) is set as an arc surface.

7. A bending machine for heat exchanger processing according to claim 1, characterized in that: The slide bar (49) passes through and is slidably connected to the upper surface of the support base (1), the clamping plate (410) is set in an arc shape, and the left part of the rear surface of the moving plate (46) is set in a convex shape.

8. A bending machine for heat exchanger processing according to claim 3, characterized in that: The push block (56) is L-shaped and is slidably connected to the rear surface of the support base (1). The insert (55) is inserted into the inner wall of the through hole (53) and is slidably connected to the lower surface of the support base (1).

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