Finned heat exchange tube and processing equipment for the finned heat exchange tube
By designing arc-shaped or "S"-shaped fins and corresponding processing equipment, the problem of low heat exchange efficiency caused by single fin shape in the prior art is solved, and more efficient heat exchange performance and flexible processing capabilities are achieved. .
Patent Information
- Application Number
- CN202010336820.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-04-26
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2040-04-26
AI Technical Summary
The shape of the existing heat exchange tube fins is single, resulting in low heat exchange efficiency, and the processing equipment cannot process fins of other shapes, which cannot meet the needs of special-shaped fins.
Design a fin-type heat exchange tube with its fins in an arc shape or "S" shape, using special processing equipment, including feeding mechanism and shoveling mechanism, and the tool is allowed to be in an arc shape or "S" through the drive unit and curved guide rail "The shape path moves, and the shovels form fins with thick roots and thin tops.
It improves heat exchange efficiency, increases the heat exchange area of the fins, smooth fluid flow, and processing equipment can flexibly adjust the tool movement trajectory to meet the processing needs of fins of different shapes, and improves the processing accuracy and applicability of the products.
Smart Images
Figure CN111390291B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of heat exchange tubes, and in particular to a finned heat exchange tube and processing equipment for the finned heat exchange tube. Background Art
[0002] Heat exchange tubes are a commonly used heat exchange element, usually made of copper, aluminum or copper-aluminum alloy. Heat exchange tubes are generally composed of a tube body and a plurality of fins located on the side of the tube body. The fins can increase the heat exchange area and thus improve the heat exchange efficiency. The heat exchange tube fins in the prior art are in the shape of straight long sheets, and the overall thickness of the fins remains basically unchanged. The heat exchange performance of fins of this shape is relatively general, resulting in a low overall heat exchange efficiency of the heat exchange tube.
[0003] In the prior art, scraping equipment is often used to process the fins of heat exchange tubes. The specific method is to make the tool reciprocate along a straight line trajectory, and to scrape the side of the material by repeating the advance and retreat action, so as to scrape up the material on the side of the material but not cut it off, thereby forming pieces of fins on the side of the material. In this scraping equipment, since the movement trajectory of the tool is a straight line, when the conveying speed of the material remains constant, the fins formed by scraping are in the shape of straight long sheets, and their thickness remains basically unchanged, and the shape of the fins formed by scraping is relatively single. The shape of the fins can significantly affect the heat exchange efficiency of the heat exchange tube, so this scraping equipment with a single tool movement trajectory cannot meet the processing requirements of the fins well, and cannot process fins of other shapes. Summary of the invention
[0004] In order to solve the problems existing in the above-mentioned prior art, one of the purposes of the present invention is to provide a finned heat exchange tube, which can improve the heat exchange efficiency. The second purpose is to provide a processing device for processing the above-mentioned finned heat exchange tube, which can process and form curved fins with thick roots and thin tops or "S"-shaped fins, which can meet the processing requirements of fins with special shapes.
[0005] The finned heat exchange tube of the present invention comprises a tube body, and fins are arranged on at least one side of the tube body; the fins are arc-shaped, and their thickness gradually decreases from the root to the top; or the fins are "S"-shaped.
[0006] A processing device for processing the above-mentioned finned heat exchange tube comprises a frame and a feeding mechanism and a scraping mechanism arranged on the frame;
[0007] The feeding mechanism comprises a feeding guide rail, a sliding seat, a feeding motor and a clamping device; the feeding guide rail extends along the material conveying direction; the sliding seat is slidably arranged on the feeding guide rail and can reciprocate on the feeding guide rail; the feeding motor is linked with the sliding seat to drive the sliding seat to move along the feeding guide rail; the clamping device is arranged on the sliding seat to clamp the end of the material;
[0008] The scraping mechanism is arranged beside the feeding guide rail, and the scraping mechanism includes a driving unit, a tool seat and a tool; the tool is installed on the tool seat, and the driving unit is linked with the tool seat to drive the tool to move along a curved path to scrape the material, and the curved path is arc-shaped or "S"-shaped.
[0009] Preferably, the driving unit includes a first motor, a second motor, a first swing arm and a second swing arm; the starting end of the first swing arm is rotatably connected to the frame, and the end is rotatably connected to the starting end of the second swing arm, the end of the second swing arm is connected to the tool seat, the first motor is arranged at the starting end of the first swing arm and is linked to the first swing arm, and the second motor is arranged at the end of the first swing arm and is linked to the second swing arm.
[0010] Preferably, the driving unit includes a curved guide rail, a movable seat, a rotating wheel group and a third motor; the curved guide rail is arranged on the side of the feeding guide rail, extends obliquely to the feeding guide rail and gradually approaches the position of the feeding guide rail along the material conveying direction, and the curved guide rail is arc-shaped or "S"-shaped; the tool seat is arranged on the upper surface of the movable seat, and the rotating wheel group is arranged on the lower surface of the movable seat, and the rotating wheel group includes rotating wheels arranged in pairs, and the two rotating wheels of the same pair are respectively arranged on the left and right sides of the curved guide rail, and the outer peripheral surface of the rotating wheel is in contact with the side surface of the curved guide rail; the third motor is arranged on the movable seat, and the third motor is linked with the rotating wheel group to drive the rotating wheel group to rotate, thereby driving the movable seat to move along the curved guide rail.
[0011] Preferably, the material clamping device includes a fixed frame, a first clamping arm, a second clamping arm and a cam, the first clamping arm and the second clamping arm are arranged in parallel on the fixed frame, and the first clamping arm and the second clamping arm are symmetrical structures to each other; the middle parts of the first clamping arm and the second clamping arm are both rotatably connected to the fixed frame; one end of the first clamping arm close to the scraping mechanism is a first clamping end, and the other end is a first adjusting end; one end of the second clamping arm close to the scraping mechanism is a second clamping end, and the other end is a second adjusting end, the first clamping end and the second clamping end are respectively oppositely provided with a first clamping opening and a second clamping opening, and the first clamping opening and the second clamping opening cooperate to jointly clamp the end of the material; the cam is arranged between the first adjusting end and the second adjusting end, and the middle part of the cam is rotatably connected to the fixed frame, and the maximum length of the cam is equal to the parallel spacing between the first clamping arm and the second clamping arm.
[0012] Preferably, inverted teeth are provided on the opposite surfaces of the first clamping opening and the second clamping opening, and the inverted teeth are inclined to the opposite surfaces and extend in the direction of the first adjustment end and the second adjustment end.
[0013] Preferably, the clamping device also includes a first return spring and a second return spring, the first return spring is arranged on the outside of the first adjusting end, one end of the first return spring is connected to the first adjusting end, and the other end is connected to the fixed frame; the second return spring is arranged on the outside of the second adjusting end, one end of the second return spring is connected to the second adjusting end, and the other end is connected to the fixed frame.
[0014] Preferably, the tool seat is in a polygonal column shape, and mounting holes for mounting the tool are provided on at least two side surfaces of the tool seat.
[0015] Preferably, a water inlet for communicating with a water injection pipe is provided on the upper surface of the tool seat, and a water outlet communicating with the water inlet is provided at the edge of the side surface of the tool seat.
[0016] Preferably, the processing equipment also includes a guide mechanism, which includes guide wheels arranged in pairs, and the two guide wheels in the same pair are respectively arranged on the left and right sides of the material conveying path, and a gap is formed between the two guide wheels for the material to pass through, and the outer peripheral surface of the guide wheel is in contact with the material.
[0017] The finned heat exchange tube described in the present invention has the advantage that the thickness of the fin gradually decreases from the root to the top. The fin of this shape can appropriately increase the volume of the fin due to the thickening of the root, thereby increasing the heat absorption of the fin to improve the heat exchange efficiency. At the same time, it has little effect on the fluid resistance in the heat exchange process, avoiding affecting the normal flow of the fluid between the fins, and has good mechanical properties, stable shape, and is not easy to deform. The "S"-shaped fin can significantly increase the heat exchange area of the fin and thus improve the heat exchange efficiency of the heat exchange tube, and the fluid flows smoothly between the fins, and the overall mechanical properties of the fin are stable.
[0018] The processing equipment for finned heat exchange tubes of the present invention has the following advantages:
[0019] 1. The tool of the present invention moves along an arc or "S"-shaped curved path to scrape the material. When the tool moves along an arc-shaped path, under the condition that the material conveying speed is constant, it will scrape the side of the material to form a fin that is thick at the root and thin at the top and is approximately in the shape of an arc. When the tool moves along an "S"-shaped path, under the condition that the material conveying speed is constant, an "S"-shaped fin will be formed on the side of the material. The processing equipment described in the present invention can be used to process the above two fin shapes with higher heat exchange efficiency, and can meet the processing requirements of fins of special shapes.
[0020] 2. The drive unit consists of two swing arms and two motors. The swing of the two swing arms drives the tool to move, so that the tool can scrape the material along an arc or "S" shaped path to meet the processing requirements of these two shapes of fins. The motor controls the swing of the swing arm, and the rotation of the motor is precisely controllable, so that the movement trajectory of the tool during the processing is precisely controllable, which is beneficial to improving the processing accuracy of the product. The movement of the tool is composed of the swinging motion of the two swing arms. The movement trajectory of the tool can be changed by adjusting the motion parameters of the two swinging motions, so that the processing equipment can be flexibly adjusted according to the shape of the required processed product, which can meet the processing requirements of fins of different shapes and has a wider applicability.
[0021] 3. The drive unit consists of a curved guide rail, a movable seat, a wheel group and a third motor. The shape of the curved guide rail depends on the shape of the fin to be processed, and the shape of the curved guide rail is the motion trajectory of the tool. For example, when the curved guide rail is in an arc shape, the motion trajectory of the tool is also in an arc shape. When the material conveying speed is constant, the side of the material will be scraped to form a fin with a thick root, a thin top, and an approximately arc shape. When the curved guide rail is in an "S" shape, the tool will scrape the side of the material to form an "S" shaped fin. The curved guide rail is used to guide the tool to move along the specified trajectory, which can meet the processing requirements of the above two shapes of fins. The tool moves along the curved guide rail with a fixed shape. In this way, the tool's motion trajectory is fixed, the scraping process is stable, the product has high precision, good consistency, and is easy to debug. The motor drives the wheel group to drive the movable seat to move, and the transmission is stable, which can provide sufficient scraping force. The shape of the curved guide rail can be designed according to the actual shape of the fin to be processed, which can meet the processing requirements of fins of different shapes and has a wider applicability.
[0022] 4. The clamping device of the present invention adopts the cooperation of the cam, the first clamping arm and the second clamping arm. The material can be firmly clamped by the clamping device, and the opening and clamping of the clamping arm can be easily adjusted.
[0023] 5. The present invention provides inverted teeth inclined inward on the opposite surfaces of the first clamp and the second clamp, and the ends of the inverted teeth are sharp. When the first clamp and the second clamp clamp the material for scraping, the tool scrapes the material along the feed direction, and applies a scraping force along the feed direction to the material. The scraping force is inclined outward in the length direction of the material. The scraping force is decomposed to obtain a vertical component a outward in the length direction of the material and a horizontal component b perpendicular to the length direction of the material. Multiple horizontal components b of the scraping force offset each other or are borne by the side walls of the clamp. Multiple vertical components a of the scraping force are superimposed to form a thrust that pushes the material to move away from the clamping device. The above thrust needs to be offset by the clamping force of the clamping device to prevent the material from escaping from the clamping device. The inverted tooth structure of the present invention, due to the extension direction of the inverted teeth and their sharpness, when the tool scrapes the material, the inverted teeth will cut into the side wall of the material and apply a cutting force inclined inward in the length direction of the material to the material. The cutting force is decomposed to obtain a vertical component force c inward along the length direction of the material and a horizontal component force d perpendicular to the length direction of the material. The horizontal component forces d applied by the inverted teeth on the opposite sides are equal in magnitude and opposite in direction and cancel each other out. The vertical component force c exerted by the inverted teeth on both sides is superimposed as a pulling force that pulls the material toward the clamping device. The direction of the pulling force is opposite to the thrust generated during the scraping process, which can reduce or even offset the outward thrust exerted by the tool on the material during the scraping process, thereby reducing or even eliminating the movement trend of the material caused by the scraping force of the tool, making the clamping of the material more stable. After actual verification, the inverted tooth structure of the present invention can stably achieve single-end clamping, that is, only one end of the material needs to be clamped by a single clamping device to stably clamp the material for scraping processing. In this way, materials of any length can be clamped for scraping processing without clamping at both ends. It is more convenient to clamp materials and has a wider range of applicability.
[0024] 6. The clamping device of the present invention is also provided with a reset spring. After the cam is rotated, the reset spring can push the first adjustment end and the second adjustment end to move closer to each other, thereby moving the first clamping end and the second clamping end away from each other, so that the clamping mouth is opened. The reset spring can realize the automatic opening of the clamping mouth, which is convenient for operation.
[0025] 7. The tool holder of the present invention is in the shape of a polygonal column, and mounting holes are provided on at least two sides of the tool holder. The tool holder of the above structure can simultaneously mount multiple sets of tools. When the tools are worn and need to be replaced, the tool holder can be rotated to complete the tool change. The tool change is convenient and fast, and there is no need to re-align the tools, which can improve production efficiency.
[0026] 8. The tool holder of the present invention is provided with a water inlet and a water outlet, and the structure of the water inlet and the water outlet can effectively cool the tool by water.
[0027] 9. The guide mechanism of the present invention includes guide wheels arranged in pairs. The guide mechanism can stably guide the material to be transported along its length direction, making the scraping process more stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 This is one of the structural schematic diagrams of a finned heat exchange tube according to the present invention;
[0029] Figure 2 This is the second structural schematic diagram of a finned heat exchange tube according to the present invention;
[0030] Figure 3 is a structural schematic diagram of Embodiment 1 of the processing equipment driving unit of the present invention;
[0031] Figure 4 yes Figure 3 Schematic diagram of the structure after removing one side baffle;
[0032] Figure 5 yes Figure 3 A top view of
[0033] Figure 6 is a structural schematic diagram of Embodiment 2 of the processing equipment driving unit of the present invention;
[0034] Figure 7 yes Figure 6 A top view of
[0035] Figure 8 yes Figure 6 Structural diagram of the position of the curved guide rail;
[0036] Fig. 9 It is a schematic diagram of the structure of the tool holder and the tool of the present invention;
[0037] Fig.10 It is a structural schematic diagram of the feeding mechanism of the present invention;
[0038] Fig.11 It is a structural schematic diagram of the clamping device of the present invention.
[0039] Explanation of the reference numerals: 1-frame, 2-feeding mechanism, 21-feeding guide rail, 22-sliding seat, 23-feeding motor, 24-clamping device, 241-fixed frame, 242-first clamping arm, 243-second clamping arm, 244-cam, 245-first return spring, 246-second return spring, 247-inverted tooth, 3-scraping mechanism, 31-driving unit, 311-first swing arm, 312-second swing arm, 313-first motor, 314-second motor, 315-curved guide rail, 316-movable seat, 317-rotating wheel group, 32-tool seat, 321-mounting hole, 322-water inlet, 323-water outlet, 4-guide mechanism, 5-tool, 6-material, 61-tube body, 62-fin. DETAILED DESCRIPTION
[0040] like Figure 1 , Figure 2 As shown, a finned heat exchange tube according to the present invention comprises a tube body 61, and a fin 62 is provided on at least one side of the tube body 61. The shape and thickness of the fin 62 will directly affect the heat exchange efficiency of the heat exchange tube. The applicant has found through actual verification that the following two shapes of fins 62 can effectively improve the heat exchange efficiency of the heat exchange tube.
[0041] like Figure 1 As shown, the fin 62 is arc-shaped, and its thickness gradually decreases from the root to the top. Theoretically, the thicker the fin 62 is, the larger the volume of the fin 62 is, the more heat it can absorb, and the more heat can be exchanged per unit time during heat exchange. However, on the contrary, during heat exchange, one of the two heat exchange fluids flows inside the tube body 61, and the other flows outside the tube body 61 and between the fins 62. The two fluids exchange heat through the tube wall and the fin 62. The increase in the thickness of the fin 62 will increase the fluid resistance when the fluid flows between the fins 62. Therefore, if the thickness of the fin 62 is increased blindly in order to improve the heat exchange efficiency, the fluid will not be able to flow smoothly between the fins 62. As shown in the present invention Figure 1 The structure of the fin 62 shown in the figure, firstly, the arc-shaped fin 62 can effectively increase the heat exchange area of the fin 62 and thus improve the heat exchange efficiency compared with the straight long fin. Secondly, the root of the fin 62 is thickened, which can appropriately increase the volume of the fin 62, thereby increasing the heat absorption of the fin 62 to improve the heat exchange efficiency. At the same time, it has little effect on the fluid resistance during the heat exchange process, avoiding affecting the normal flow of the fluid between the fins 62, and has good mechanical properties, stable shape, and is not easy to deform.
[0042] like Figure 2 As shown, the fins 62 are "S" shaped. Compared with straight long fins, the heat exchange area of the "S" shaped fins is significantly increased, thereby improving the heat exchange efficiency of the heat exchange tubes. The fluid flows smoothly between the fins 62, and the overall mechanical properties of the fins 62 are stable.
[0043] This embodiment further provides a processing device for processing the above-mentioned heat exchange tube fins, including a frame 1 and a feeding mechanism 2 and a scraping mechanism 3 arranged on the frame 1.
[0044] like Fig.10 As shown, the feeding mechanism 2 includes a feeding guide rail 21, a sliding seat 22, a feeding motor 23 and a clamping device 24. The feeding guide rail 21 is arranged in the middle of the frame 1 and extends in the same direction as the frame 1. There are two feeding guide rails 21, which are arranged relatively parallel. The sliding seat 22 is a square seat, and the left and right sides of its bottom are respectively provided with slide grooves adapted to the feeding guide rail 21, and the distance between the two slide grooves is equal to the distance between the two feeding guide rails 21. The two slide grooves are respectively slidably sleeved on the two feeding guide rails 21, so that the sliding seat 22 can slide on the feeding guide rail 21 along the extension direction of the feeding guide rail 21. The feeding motor 23 is arranged at the beginning of the frame 1 and between the two feeding guide rails 21. The feeding motor 23 is linked with the sliding seat 22 through a ball screw. Specifically, the screw is arranged between the two feeding guide rails 21 and extends in the same direction as the feeding guide rail 21. The screw is coaxially connected with the output shaft of the feeding motor 23. The screw nut cooperates with the screw, and the screw nut is connected to the sliding seat 22. The output shaft of the feeding motor 23 rotates to drive the screw to rotate. Under the guidance of the feeding guide rail 21, the screw nut drives the sliding seat 22 to make a linear motion along the extension direction of the feeding guide rail 21, and the moving direction of the sliding seat 22 can be controlled by controlling the forward and reverse rotation of the feeding motor 23. A clamping device 24 is provided on the upper surface of the sliding seat 22. The clamping device 24 is used to clamp the end of the material 6 so that most of the material 6 is in a suspended state to facilitate scraping processing. After the clamping device 24 clamps the material 6, it moves along the extension direction of the feeding guide rail 21 with the sliding seat 22 under the driving action of the feeding motor 23, thereby realizing the transportation of the material 6.
[0045] The scraping mechanism 3 is arranged beside the feeding guide rail 21, and the scraping mechanism 3 includes a driving unit 31, a tool seat 32 and a tool 5. The tool 5 is installed on the tool seat 32, and the driving unit 31 is linked with the tool seat 32 to drive the tool 5 to move along a curved path to scrape the material 6, and the curved path is arc-shaped or "S"-shaped. The tool 5 of the present invention moves along an arc-shaped or "S"-shaped curved path to scrape the material 6. When the tool 5 moves along the arc-shaped path, under the condition that the conveying speed of the material 6 is constant, the fin 62 with a thick root and a thin top and approximately an arc shape will be scraped on the side of the material 6. When the tool 5 moves along the "S"-shaped path, under the condition that the conveying speed of the material 6 is constant, an "S"-shaped fin 62 will be formed on the side of the material 6. The processing equipment described in the present invention can be used to process the above two fin 62 shapes with higher heat exchange efficiency, and can meet the processing requirements of fins 62 of special shapes.
[0046] The driving unit 31 has at least the following two implementations.
[0047] Example 1
[0048] like Figure 3-Figure 5 As shown, the driving unit 31 includes a first motor 313, a second motor 314, a first swing arm 311 and a second swing arm 312. In this embodiment, the number of the scraping mechanisms 3 is two, which are respectively arranged on the left and right sides of the material 6 conveying path. The starting end of the first swing arm 311 is rotatably connected to the frame 1, and the end is rotatably connected to the starting end of the second swing arm 312. The end of the second swing arm 312 is connected to the tool holder 32. The first motor 313 is arranged at the starting end of the first swing arm 311 and is linked with the first swing arm 311 to drive the first swing arm 311 to rotate. The second motor 314 is arranged at the starting end of the second swing arm 312 and is linked with the second swing arm 312 to drive the second swing arm 312 to rotate. Specifically, the frame 1 is provided with a through hole at a position corresponding to the starting end of the first swing arm 311, and the starting end of the first swing arm 311 extends outward to form a connecting shaft adapted to the through hole, the connecting shaft is penetrated in the through hole, and is matched with the through hole clearance, and a bearing is sleeved at the connecting position to reduce friction. The first motor 313 is installed below the through hole, and the output shaft of the first motor 313 is coaxially connected with the connecting shaft through a coupling. In this way, the output shaft of the first motor 313 will drive the connecting shaft to rotate when it rotates, and then drive the first swing arm 311 to rotate around the center of the connecting shaft. The end of the first swing arm 311 is rotatably connected to the beginning of the second swing arm 312, and the rotational connection method is the same as the rotational connection method of the hole-shaft matching described above, which will not be repeated here. The second motor 314 is arranged on the first swing arm 311 and is located at the end of the first swing arm 311. The output shaft of the second motor 314 is connected to the second swing arm 312, so that the second motor 314 can drive the second swing arm 312 to rotate when it rotates. In this embodiment, the tool 5 is driven to move by the swinging motion of the first swing arm 311 and the second swing arm 312, so that the driving unit 31 forms a structure similar to a two-joint mechanical arm, so that the tool seat 32 located at the end of the second swing arm 312 can scrape the material 6 along an arc or "S"-shaped path to meet the processing requirements of the two shapes of fins 62. By controlling the swing of the swing arm through the motor, the rotation of the motor is precisely controllable, so that the motion trajectory of the tool 5 during the processing is precisely controllable, which is conducive to improving the processing accuracy of the product. The movement of the tool 5 is composed of two swing arm swinging movements, and the motion trajectory of the tool 5 can be changed by adjusting the motion parameters of the two swinging movements, so that the processing equipment can be flexibly adjusted according to the shape of the product to be processed, and can meet the processing requirements of fins 62 of different shapes, and has a wider applicability.
[0049] In addition, in the actual application process, as a variant embodiment of embodiment 1. When the fin 62 to be processed is arc-shaped, thick at the root and thin at the top, only a single swing arm and a single motor are required to meet the processing requirements. That is, the single swing arm is rotatably connected to the frame 1, the motor is arranged at the beginning of the swing arm and linked with the swing arm, and the tool seat 32 is arranged at the end of the swing arm. The swing arm is driven to rotate by the motor, so that the tool 5 can move along the arc trajectory. The structure of the above-mentioned single swing arm is simpler and can be applied to the processing of arc-shaped fins.
[0050] Example 2
[0051] like Figure 6-Figure 8 As shown, the driving unit 31 includes a curved guide rail 315, a movable seat 316, a rotating wheel group 317 and a third motor (not shown in the figure). In this embodiment, the number of scraping mechanisms 3 is two, which are respectively arranged on the left and right sides of the material 6 conveying path. The two curved guide rails 315 are inclined to extend at the feeding guide rail 21 and gradually approach the position of the feeding guide rail 21 along the material 6 conveying direction. The curved guide rail 315 is arc-shaped or "S"-shaped. Figure 6-Figure 8 The illustrated example is an "S" shaped curved guide rail 315. The tool holder 32 is disposed on the upper surface of the movable holder 316, and the rotating wheel assembly 317 is disposed on the lower surface of the movable holder 316. Figure 8 , one side of the movable seat 316 is used to install the tool seat 32, and the other side is provided with an adapter plate, the upper part of the adapter plate is rotatably connected to the movable seat 316, the rotating wheel group 317 is arranged on the lower surface of the adapter plate, and each rotating wheel of the rotating wheel group 317 is rotatably connected to the adapter plate, so that the rotating wheel can rotate relative to the adapter plate. In this embodiment, the number of rotating wheels is two pairs of four, and two are symmetrically arranged on the left and right sides of the curved guide rail 315. The upper edge of the curved guide rail 315 extends outward. The middle part of the rotating wheel is recessed inward to form a groove that matches the upper edge of the curved guide rail 315. The upper edge of the curved guide rail 315 is engaged in the groove, so that when the rotating wheel rotates, it will drive the movable seat 316 to move along the curved guide rail 315 as a whole, and the rotating wheel and the curved guide rail 315 can be tightly matched and not easy to fall off. The third motor is linked with the rotating wheel group 317 to drive the rotating wheel group 317 to rotate, and then drive the movable seat 316 to move along the curved guide rail 315. In this embodiment, there are four third motors, corresponding to the four rotating wheels. Each third motor drives a corresponding rotating wheel to rotate to provide sufficient scraping force. When the third motor rotates, it drives the rotating wheel to rotate along the curved guide rail 315. Under the guidance of the curved guide rail 315, the rotating wheel drives the movable seat 316 to move along the curved guide rail 315. The curved guide rail 315 depends on the shape of the fin 62 to be processed, such as Figure 4-Figure 8The "S"-shaped curved guide rail 315 shown, when the third motor rotates, will drive the movable seat 316 to move along the curved guide rail 315, so that the movement trajectory of the tool 5 is consistent with the curved guide rail 315, that is, in an "S" shape. In this way, when the material 6 is conveyed forward at a constant speed, the tool 5 moving in an "S" shape will scrape the side of the material 6 to form a Figure 2 The "S"-shaped fin 62 shown in the figure. The tool 5 is made to reciprocate along the curved guide rail 315 for multiple times, so that the tool 5 can complete multiple feeding and retracting actions to scrape the side of the material 6. If the shape of the fin 62 to be processed is an arc, the shape of the curved guide rail 315 is set to be an arc, so that the tool 5 can move along the arc-shaped curved guide rail 315 under the driving action of the third motor, and then scrape the side of the material 6 to form an arc-shaped fin 62.
[0052] In this embodiment, the tool 5 is guided to move along a specified trajectory by a curved guide rail 315, which can meet the processing requirements of the above two shapes of fins 62. The tool 5 moves along the curved guide rail 315 with a fixed shape. In this way, the movement trajectory of the tool 5 is fixed, the scraping process is stable, the product has high precision, good consistency, and is easy to debug. The motor drives the rotating wheel group 317 to drive the movable seat 316 to move, and the transmission is stable, which can provide sufficient scraping force. The shape of the curved guide rail 315 can be designed according to the actual shape of the fin 62 to be processed, which can meet the processing requirements of fins 62 of different shapes, and has a wider applicability.
[0053] The driving units 31 of the above two different embodiments can both drive the tool 5 to move along an arc or "S" shaped trajectory, and then scrape the side of the material 6 to form an arc or "S" shaped fin 62. Relatively speaking, in Example 1, a single structure can complete the processing of two types of arc or "S" shaped fins 62 by swinging the swing arm. By adjusting the motor parameters of the first motor 313 and the second motor 314 according to the processed shape, the tool 5 can present different motion trajectories, and then process and form fins 62 of different shapes. However, it is relatively difficult to debug, and it is necessary to adjust the parameters of each motor many times to make the tool 5 move along the required trajectory. In Example 2, the movable seat 316 is guided to move by the curved guide rail 315, and then the tool 5 moves along the curved guide rail 315. This method is relatively simple to debug. It only needs to start the third motor to make the tool 5 move along the curved guide rail 315, and then scrape out the required shape of the fin 62. However, in this way, a curved guide rail 315 of one shape can only process a fin 62 of one shape. When a fin 62 of a different shape needs to be processed, a curved guide rail 315 of a corresponding shape needs to be designed and replaced. The above two different embodiments of the driving unit 31 each have advantages and disadvantages, and can be selected according to actual needs in actual production.
[0054] like Fig.11As shown, the clamping device 24 includes a fixed frame 241, a first clamping arm 242, a second clamping arm 243 and a cam 244. The first clamping arm 242 and the second clamping arm 243 are arranged in parallel on the fixed frame 241, and the first clamping arm 242 and the second clamping arm 243 are symmetrical structures to each other; the middle parts of the first clamping arm 242 and the second clamping arm 243 are both rotatably connected to the fixed frame 241; one end of the first clamping arm 242 close to the scraping mechanism 3 is a first clamping end, and the other end is a first adjusting end; one end of the second clamping arm 243 close to the scraping mechanism 3 is a second clamping end, and the other end is a second adjusting end. The first clamping end and the second clamping end are respectively oppositely provided with a first clamping opening and a second clamping opening, and the first clamping opening and the second clamping opening cooperate to clamp the end of the material 6 together; the cam 244 is arranged between the first adjusting end and the second adjusting end, and the middle part of the cam 244 is rotatably connected to the fixed frame 241 through a bolt. Specifically, the fixing frame 241 is a rectangular steel frame, which is hollow in the middle. The front end surface is provided with a socket for installing the clamp arm. The height of the socket is preferably 4-5 times the thickness of the clamp arm, so that multiple layers of clamp arms can be installed at the same time to clamp multiple materials 6 for scraping processing. The first clamp arm 242 and the second clamp arm 243 are symmetrical structures and are relatively arranged on the left and right sides of the central axis of the fixing frame 241. The middle of the first clamp arm 242 and the second clamp arm 243 are both provided with a connecting hole. The upper surface of the fixing frame 241 is provided with a threaded hole matching the connecting hole at a position corresponding to the connecting hole, and a matching bolt is also provided, which is inserted into the through hole and the connecting hole to realize the rotation connection between the first clamp arm 242, the second clamp arm 243 and the fixing frame 241, and the relative movement or relative fixation between the first clamp arm 242, the second clamp arm 243 and the fixing frame 241 can be adjusted by loosening or tightening the bolt. The first clamping end and the second clamping end are respectively provided with a first clamping opening and a second clamping opening opposite to each other. Specifically, the ends of the opposite surfaces of the first clamping arm 242 and the second clamping arm 243 are recessed inwardly, so that the width of the ends of the first clamping arm 242 and the second clamping arm 243 is small, so that after the first clamping arm 242 and the second clamping arm 243 are brought together, a clamping opening similar to a "concave" shape will be formed at the ends, and the clamping opening is used to clamp the end of the material 6. The cam 244 is arranged between the first adjustment end and the second adjustment end. Specifically, the maximum length of the cam 244 is equal to the parallel spacing between the first clamping arm 242 and the second clamping arm 243. In this way, when the cam 244 rotates to the point where the long axis direction is perpendicular to the first clamping arm 242, the two ends of the cam 244 will resist the first clamping arm 242 and the second clamping arm 243, so that the first clamping arm 242 and the second clamping arm 243 are parallel and close to each other. At this time, the first clamp and the second clamp are close to each other, and the first clamp and the second clamp cooperate to clamp the end of the material 6 together. After the first clamp and the second clamp clamp the material 6, the bolts at the connecting hole position and the bolts in the middle of the cam 244 are locked respectively, so that the first clamping arm 242, the second clamping arm 243 and the cam 244 remain relatively fixed, so that the material 6 can be firmly clamped by the clamping device 24.When it is necessary to open the first clamp arm 242 and the second clamp arm 243 to clamp the material 6, the bolts in the middle of the cam 244 and the bolts at the connection hole are unscrewed in sequence, and the cam 244 is rotated so that the short axis direction of the cam 244 is perpendicular to the first clamp arm 242. At this time, the first adjustment end and the second adjustment end can both rotate in the direction of the cam 244. When the first adjustment end and the second adjustment end rotate in the direction of the cam 244 and approach each other, the first clamping end and the second clamping end at the other end will move away from each other, thereby opening the material clamping device 24. At this time, the end of the material 6 can be placed in the clamping opening to clamp the material 6. The material clamping device 24 of the present invention adopts the cooperation of the cam 244, the first clamp arm 242 and the second clamp arm 243. This material clamping device 24 firmly clamps the material 6, and the opening and clamping adjustment of the clamp arm are convenient.
[0055] In the present invention, inverted teeth 247 inclined inward are provided on the opposite surfaces of the first clamp and the second clamp, and the ends of the inverted teeth 247 are sharp. When the first clamp and the second clamp clamp the material 6 for scraping, the tool 5 scrapes the material 6 along the feed direction, and a scraping force along the feed direction is applied to the material 6. The scraping force is inclined outward along the length direction of the material 6. The scraping force is decomposed to obtain a vertical component a outward along the length direction of the material 6 and a horizontal component b perpendicular to the length direction of the material 6. The horizontal components b of the multiple scraping forces offset each other or are borne by the side walls of the clamp. The vertical components a of the multiple scraping forces are superimposed to form a thrust that pushes the material 6 to move away from the clamping device 24. The above thrust needs to be offset by the clamping force of the clamping device 24 to prevent the material 6 from escaping from the clamping device 24. The inverted teeth 247 structure of the present invention, due to the extending direction of the inverted teeth 247 and its sharpness, when the cutter 5 scrapes the material 6, the inverted teeth 247 will cut into the side wall of the material 6 and apply a cutting force inclined inward in the length direction of the material 6 to the material 6. The cutting force is decomposed to obtain a vertical component force c inward in the length direction of the material 6 and a horizontal component force d perpendicular to the length direction of the material 6. The horizontal component forces d applied by the inverted teeth 247 on the opposite sides are equal in magnitude and opposite in direction and cancel each other out. The vertical component force c exerted by the inverted teeth 247 on both sides is superimposed to form a pulling force that pulls the material 6 toward the clamping device 24. The direction of the pulling force is opposite to the thrust generated during the scraping process, which can reduce or even offset the outward thrust exerted by the tool 5 on the material 6 during the scraping process, thereby reducing or even eliminating the movement tendency of the material 6 caused by the scraping force of the tool 5, making the clamping of the material 6 more stable. It has been verified in practice that the inverted tooth 247 structure of the present invention can stably achieve single-end clamping, that is, only one end of the material 6 needs to be clamped by a single clamping device 24 to stably clamp the material 6 for scraping processing. In this way, any length of material 6 can be clamped for scraping processing without clamping at both ends. It is more convenient to clamp the material 6 and has a wider applicability.
[0056] In this embodiment, the clamping device 24 further includes a first return spring 245 and a second return spring 246. The first return spring 245 is arranged outside the first adjustment end, one end of the first return spring 245 is connected to the first adjustment end, and the other end is connected to the fixing frame 241; the second return spring 246 is arranged outside the second adjustment end, one end of the second return spring 246 is connected to the second adjustment end, and the other end is connected to the fixing frame 241. After the cam 244 is rotated, the return spring can push the first adjustment end and the second adjustment end to approach each other, thereby moving the first clamping end and the second clamping end away from each other, so that the clamping jaw is opened. The return spring can realize the automatic opening of the clamping jaw, which is convenient for operation.
[0057] like Fig. 9 As shown, the tool seat 32 is in the shape of a polygonal prism, and mounting holes 321 for mounting the tool 5 are provided on at least two side surfaces of the tool seat 32. Specifically, in the present embodiment, the tool seat 32 is in the shape of a regular hexagonal prism, and mounting holes 321 are provided on three side surfaces of the tool seat 32, and the side surfaces provided with the mounting holes 321 are not adjacent to each other. The mounting holes 321 are threaded holes arranged in a row, and the tool 5 is mounted on the tool seat 32 by bolts. After the tool 5 is mounted on the tool seat 32, the edge of the blade is exposed outside the side surface of the tool seat 32 for scraping the material 6. The tool seat 32 of the above structure can simultaneously mount multiple groups of tools 5. When the tool 5 is worn and needs to be replaced, the tool change can be completed by simply rotating the tool seat 32. The tool change is convenient and fast, and there is no need to re-align the tool, which can improve production efficiency.
[0058] like Fig. 9 As shown, in this embodiment, a water inlet 322 for communicating with a water injection pipe is provided on the upper surface of the tool seat 32, and a water outlet 323 communicating with the water inlet 322 is provided at the edge of the side of the tool seat 32. The structure of the water inlet 322 and the water outlet 323 can effectively cool the tool 5 by water.
[0059] This embodiment is also provided with a guide mechanism 4, which is specifically a guide wheel arranged in pairs. The two guide wheels of the same pair are respectively arranged on the left and right sides of the material 6 conveying path, and a gap is formed between the two guide wheels for the material 6 to pass through. After the material 6 passes through the gap, the outer peripheral surface of the guide wheel contacts the material 6. Specifically, the frame 1 is provided with opposite mounting columns on the left and right sides of the material 6 conveying path, and a socket adapted to the mounting column is provided in the middle of the guide wheel. The guide wheel is inserted on the mounting column through the socket, and the gap between the socket and the mounting column is matched, so that the guide wheel can rotate relative to the mounting column. The spacing between the two guide wheels of the same pair is roughly equal to the width of the material 6, so that the material 6 will contact the outer peripheral surface of the guide wheel after passing through the gap between the two guide wheels. When the material 6 starts to be conveyed along its length direction, the guide wheel can rotate with the conveying of the material 6. The above-mentioned guide mechanism 4 can stably guide and support the material 6 to be conveyed along its length direction, making the scraping process more stable.
[0060] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application.
[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figures. It should be understood that the spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used herein are interpreted accordingly.
[0062] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.
[0063] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.
Claims
1. A processing equipment for finned heat exchange tubes, characterized in that: It comprises a frame and a feeding mechanism and a scraping mechanism arranged on the frame; The feeding mechanism comprises a feeding guide rail, a sliding seat, a feeding motor and a clamping device; the feeding guide rail extends along the material conveying direction; the sliding seat is slidably arranged on the feeding guide rail and can reciprocate on the feeding guide rail; the feeding motor is linked with the sliding seat to drive the sliding seat to move along the feeding guide rail; the clamping device is arranged on the sliding seat to clamp the end of the material; The scraping mechanism is arranged beside the feeding guide rail, and the scraping mechanism includes a driving unit, a tool seat and a tool; the tool is installed on the tool seat, and the driving unit is linked with the tool seat to drive the tool to move along a curved path to scrape the material, and the curved path is arc-shaped or "S"-shaped; The driving unit comprises a curved guide rail, a movable seat, a rotating wheel group and a third motor; the curved guide rail is arranged beside the feeding guide rail, extends obliquely to the feeding guide rail and gradually approaches the position of the feeding guide rail along the material conveying direction, and the curved guide rail is arc-shaped or "S"-shaped; the tool seat is arranged on the upper surface of the movable seat, and the rotating wheel group is arranged on the lower surface of the movable seat, and the rotating wheel group comprises rotating wheels arranged in pairs, and the two rotating wheels of the same pair are respectively arranged on the left and right sides of the curved guide rail, and the outer peripheral surface of the rotating wheel is in contact with the side surface of the curved guide rail; the third motor is arranged on the movable seat, and the third motor is linked with the rotating wheel group to drive the rotating wheel group to rotate, thereby driving the movable seat to move along the curved guide rail; At least two side surfaces of the tool seat are provided with mounting holes for mounting the tool.
2. The processing equipment according to claim 1, characterized in that: The material clamping device includes a fixed frame, a first clamping arm, a second clamping arm and a cam, the first clamping arm and the second clamping arm are arranged in parallel on the fixed frame, and the first clamping arm and the second clamping arm are symmetrical structures to each other; the middle parts of the first clamping arm and the second clamping arm are both rotatably connected to the fixed frame; one end of the first clamping arm close to the scraping mechanism is a first clamping end, and the other end is a first adjusting end; one end of the second clamping arm close to the scraping mechanism is a second clamping end, and the other end is a second adjusting end, the first clamping end and the second clamping end are respectively oppositely provided with a first clamping opening and a second clamping opening, and the first clamping opening and the second clamping opening cooperate to jointly clamp the end of the material; the cam is arranged between the first adjusting end and the second adjusting end, and the middle part of the cam is rotatably connected to the fixed frame, and the maximum length of the cam is equal to the parallel spacing between the first clamping arm and the second clamping arm.
3. The processing equipment according to claim 2, characterized in that: The opposite surfaces of the first clamping opening and the second clamping opening are both provided with inverted teeth, and the inverted teeth are inclined to the opposite surfaces and extend in the direction of the first adjustment end and the second adjustment end.
4. The processing equipment according to claim 2 or 3, characterized in that: The clamping device further comprises a first return spring and a second return spring, wherein the first return spring is arranged on the outside of the first adjusting end, one end of the first return spring is connected to the first adjusting end, and the other end of the first return spring is connected to the fixing frame; The second return spring is arranged on the outer side of the second adjustment end, one end of the second return spring is connected to the second adjustment end, and the other end is connected to the fixing frame.
5. The processing equipment according to claim 1, characterized in that: The upper surface of the tool seat is provided with a water injection port for communicating with a water injection pipe, and the edge of the side surface of the tool seat is provided with a water outlet communicated with the water injection port.
6. The processing equipment according to claim 1, characterized in that: It also includes a guide mechanism, which includes guide wheels arranged in pairs. The two guide wheels in the same pair are respectively arranged on the left and right sides of the material conveying path. A gap is formed between the two guide wheels for the material to pass through, and the outer peripheral surface of the guide wheel is in contact with the material.