A refrigeration copper pipe reaming device based on multi-slot positioning

Abstract

The application discloses a refrigeration copper pipe reaming device based on multi-groove positioning, relates to the technical field of reaming, and comprises a cabinet, a divider, a gantry and a reaming mechanism. The divider is fastened to the cabinet. The output end of the divider is provided with a turntable. A plurality of clamping mechanisms are arranged in the circumference of the turntable. The plurality of clamping mechanisms are used for fixing the copper pipe. The reaming mechanism is fastened to the gantry. One side of the gantry is provided with a controller. The controller is used for controlling the actions of each mechanism. The divider is a mechanism for realizing intermittent motion and is used for driving the turntable to realize intermittent rotation on the cabinet. Therefore, the divider can convert continuous rotation into intermittent motion, ensures the accurate position of the copper pipe when the copper pipe stays at the reaming station, avoids the deviation from leading to uneven reaming or damage to tools, and realizes the multi-groove positioning machining of the copper pipe under the cooperation of the divider and the reaming mechanism under the control of the controller.

Description

Technical Field

[0001] This invention relates to the field of hole enlargement technology, specifically a hole enlargement device for refrigeration copper tubes based on multi-slot positioning. Background Technology

[0002] As a core heat transfer element in refrigeration equipment, the processing quality of copper tubes directly affects the system's sealing performance and heat exchange efficiency. Hole expansion is a crucial step in copper tube processing, increasing the tube end diameter to achieve precise fit with other components. However, existing hole expansion devices still face the following technical bottlenecks in complex operating conditions:

[0003] Traditional reaming equipment often employs continuous rotation or single-station processing modes. During the transfer of copper tubes, positional deviations can easily occur due to inertia or mechanical clearances, leading to inaccurate alignment between the reaming head and the copper tube. This can result in problems such as reaming eccentricity, tube end deformation, and even tool damage. Furthermore, the lack of reliable clamping and guiding designs makes the copper tube prone to displacement during processing, further reducing processing consistency.

[0004] The wall thickness of copper tubes varies due to batches of materials or process fluctuations, while traditional reaming equipment mostly uses fixed feed parameters, which cannot dynamically adjust the processing parameters according to the wall thickness. When reaming thicker copper tubes, the resistance increases sharply. If high-speed feed or high-speed processing is still used, it is easy to cause local stress concentration in the tube body, leading to cracking or scratches on the inner wall. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-slot positioning-based refrigeration copper tube expansion device to solve the problems raised in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a refrigeration copper pipe reaming device includes a cabinet, a divider, a gantry frame, and a reaming mechanism. The divider is fixedly connected to the cabinet. The output end of the divider is provided with a turntable. Several clamping mechanisms are arranged around the turntable to fix the copper pipe. The reaming mechanism is fixedly connected to the gantry frame. A controller is provided on one side of the gantry frame to control the operation of each mechanism.

[0007] The cabinet provides the installation foundation for each mechanism, the gantry provides the fixed foundation for the reaming mechanism, and the divider is the mechanism that enables intermittent motion. It drives the turntable to rotate intermittently on the cabinet, thereby causing the clamping mechanism on the turntable to move intermittently over a certain distance. This allows the copper tube fixed by the clamping mechanism to rotate to a fixed point below the reaming mechanism. Therefore, the divider can convert continuous rotation into intermittent motion, ensuring that the copper tube is accurately positioned when it stops at the reaming station, avoiding uneven reaming or damage to the tools due to deviation. In other words, under the control of the controller, the divider and the reaming mechanism can work together to achieve multi-groove positioning processing of the copper tube.

[0008] Furthermore, the reaming mechanism includes a hydraulic cylinder, a connecting seat, a drive motor, and a reaming head. The hydraulic cylinder is fastened to the gantry frame, and the output end of the hydraulic cylinder is fastened to the connecting seat. The drive motor is fastened to the connecting seat, and the output end of the drive motor is driven by the reaming head. The reaming head is equipped with a detection component and a lubrication component. The detection component detects the change in resistance during the reaming process, and the lubrication component can automatically adjust the amount of lubricating oil injected based on the detection results of the detection component.

[0009] The reaming mechanism of this application expands the copper tube through rotational extrusion. The hydraulic cylinder is the main power source of the reaming mechanism. When the hydraulic cylinder moves, it drives the connecting seat downward, causing the drive motor and the reaming head to press downward into the copper tube to expand the hole. The drive motor can drive the reaming head to rotate, thereby improving the uniformity of the reaming process. During the reaming process, the increased wall thickness of the copper tube will lead to an increase in the pressure on the cutting tool. That is, when the wall thickness of the copper tube increases, the resistance of the inner wall of the copper tube to the reaming head will increase. By detecting the change in this resistance, the wall thickness of the copper tube can be determined. However, fixed feed parameters cannot adapt to the differences in copper tube wall thickness, which can easily lead to tube cracking. Frictional heat accumulation during the reaming process causes the copper tube to soften, affecting dimensional accuracy. The detection component senses the processing resistance of the reaming head in real time and dynamically adjusts the feed speed of the reaming head to ensure uniform force on the copper tube during the reaming process. In addition, when the detection component detects that the wall thickness of the copper tube is large, the linkage lubrication component increases the lubrication amount, thereby avoiding excessive temperature during reaming.

[0010] Furthermore, the connecting seat is equipped with a guide rod, which is slidably connected to the gantry frame. The reaming head is equipped with a guide section and a reaming section. The guide section is conical, and the detection component is located at the reaming section.

[0011] The guide rod is used to constrain the movement of the connector, making the up-and-down movement of the connector more accurate. The tapered guide section facilitates the insertion of the reaming head into the copper tube. The diameter of the reaming section is equivalent to the diameter of the hole to be processed, that is, the detection component located in the reaming section can fit against the inner wall of the copper tube, thereby ensuring detection accuracy.

[0012] Furthermore, the detection assembly includes a rotating ring, an arc-shaped slider, and an arc-shaped spring. The rotating ring is rotatably connected to the reaming head. The reaming head has an arc-shaped groove and a detection groove inside. The arc-shaped slider is fastened to the rotating ring and slidably connected to the arc-shaped groove. One end of the arc-shaped spring is fastened to the arc-shaped slider, and the other end of the arc-shaped spring is fastened to the inner wall of the arc-shaped groove. Hydraulic oil is added to the side of the arc-shaped groove away from the arc-shaped spring. The arc-shaped groove is connected to the detection groove.

[0013] During testing, the outer side of the rotating ring is in contact with the inner wall of the copper tube. Since the reaming head is constantly rotating, the resistance of the copper tube to the reaming head is transmitted to the rotating ring. When the wall thickness of the copper tube increases, the resistance of the inner wall of the copper tube to the rotating ring increases, thereby causing the rotating ring to shift to one side. The arc-shaped slider shifts to the same side along the arc-shaped groove, and the arc-shaped spring is stretched. The hydraulic oil in the arc-shaped groove is pressed into the detection groove. Since the greater the wall thickness of the copper tube, the greater the resistance to the rotating ring, the longer the distance the arc-shaped slider shifts, that is, the more hydraulic oil is pressed into the detection groove, indicating that the wall thickness of the copper tube is greater.

[0014] Furthermore, the detection assembly also includes a piston, a magnetic rod, and a coil. The piston is slidably connected to the detection groove, the magnetic rod is fastened to the piston, and the coil is wound around the outer ring of the detection groove. The coil is electrically connected to the controller. The controller detects that the larger the induced current generated on the coil, the greater the thickness of the copper tube.

[0015] Because the thicker the copper tube wall, the more hydraulic oil is pressed into the detection groove, the longer the distance the piston is pushed upward by the hydraulic oil, the longer the distance the coil cuts the magnetic field lines, and the larger the induced current generated. That is, the larger the induced current generated on the coil detected by the controller, the larger the copper tube wall is. At this time, the controller simultaneously reduces the feed speed of the oil cylinder to reduce the load and prevent the copper tube from cracking. In addition, it also simultaneously reduces the speed of the drive motor to prevent the temperature from getting too high during the hole expansion process.

[0016] Furthermore, the cross-sectional area of ​​the detection groove is smaller than that of the arc-shaped groove.

[0017] To improve the accuracy of the detection, Pascal's principle is used. By setting the cross-sectional area of ​​the detection groove to be smaller than that of the arc groove, the offset of the rotating ring is amplified, thus facilitating the detection.

[0018] Furthermore, the lubrication assembly includes a liquid distribution tray, a support frame, an adjusting block, a support spring, and an electromagnet. A lubrication pump is installed inside the cabinet. The outlet of the lubrication pump is connected to the liquid distribution tray. The liquid distribution tray is rotatably connected to the reaming head. The liquid distribution tray is fastened to the support frame. The upper end of the support frame is fastened to the housing of the drive motor. The reaming head is provided with an adjusting groove and a liquid guiding channel. The inlet of the liquid guiding channel is connected to the liquid distribution tray, and the outlet of the liquid guiding channel faces the inner wall of the copper tube.

[0019] The adjusting block is slidably connected to the adjusting groove. The adjusting block is provided with a connecting flow channel. One end of the supporting spring is fixedly connected to the adjusting block, and the other end of the supporting spring is fixedly connected to the inner wall of the adjusting groove. The electromagnet is fixedly connected to the adjusting groove and is located on the side of the adjusting groove away from the supporting spring. The electromagnet is electrically connected to the controller. The adjusting block is made of ferromagnetic material. The connecting flow channel is connected to the liquid guiding flow channel and the connecting flow channel and the liquid guiding flow channel are arranged alternately.

[0020] The support frame is fixed to the housing of the drive motor, providing support for the distribution plate. The distribution plate guides the cooling oil pumped by the lubrication pump into the reaming head. During normal reaming, the cooling oil flows in through the distribution plate and is then sprayed onto the inner wall of the copper tube through the guide channel to cool it. The staggered arrangement of the connecting channels and the guide channels results in a small cross-section and low flow rate of the cooling oil in the initial state. When the detection component detects an increase in the wall thickness of the copper tube, the controller increases the current transmitted to the electromagnet, which increases the magnetic force of the electromagnet and the attraction of the ferromagnetic adjustment block. This causes the adjustment block to shift to one side along the adjustment groove, stretching the support spring and increasing the overlapping area of ​​the connecting channel and the guide channel, thereby increasing the flow rate of the cooling oil and improving the cooling effect. This achieves automatic adjustment of the cooling effect according to the wall thickness of the copper tube.

[0021] Furthermore, the clamping mechanism includes a fixed base, a column, a cylinder, and a clamping block. The fixed base is fastened to the turntable, the column is fastened to the fixed base, the column is located at both ends of the fixed base, the cylinder is fastened to the column, the output end of the cylinder is drivenly connected to the clamping block, and the clamping block is slidably connected to the fixed base.

[0022] The fixed base is fixed on the turntable to provide stable support for the clamping mechanism. When feeding, the copper tube is placed between the two clamping blocks. Then, the cylinder is activated to move the clamping blocks to position and clamp the copper tube to prevent it from moving during hole enlargement.

[0023] Furthermore, the clamping block is provided with a mating groove, which is semi-circular.

[0024] The semi-circular groove matches the shape of the copper tube, allowing it to be clamped more effectively.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. High-precision positioning and stability: The divider drives the turntable to achieve intermittent movement, ensuring that the copper tube stops precisely at the reaming station, avoiding uneven reaming or tool damage caused by positional deviation; the guide rod constrains the movement of the connecting seat, and combined with the tapered guide section design, it improves the positioning accuracy of the reaming head when inserting into the copper tube and reduces mechanical stress.

[0027] 2. Adaptive dynamic adjustment capability: The detection component cooperates with the arc-shaped slider through a movable rotating ring. The greater the wall thickness of the copper tube, the greater the resistance to the rotating ring, the longer the arc-shaped slider deflects, the more hydraulic oil is pressed into the detection groove, the longer the distance the piston is pushed upward by the hydraulic oil, the longer the distance the coil cuts the magnetic field lines, and the greater the induced current generated. That is, the greater the induced current generated on the coil detected by the controller, the greater the wall thickness of the copper tube. The system dynamically adjusts the feed speed of the hydraulic cylinder and the speed of the drive motor to adapt to the processing requirements of copper tubes with different wall thicknesses and prevent the tube body from cracking.

[0028] The lubrication assembly automatically increases the lubricating oil flow rate based on the wall thickness detection results. Through the staggered connecting flow channels and liquid guiding flow channels, the position of the regulating block is controlled by an electromagnet, thereby adjusting the coolant flow rate. This achieves automatic adjustment of cooling efficiency based on the copper tube wall thickness, preventing copper tube softening and deformation, and ensuring dimensional accuracy. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 for Figure 1 A magnified view of part A;

[0031] Figure 3 This is a schematic diagram of the gantry structure of the present invention;

[0032] Figure 4 for Figure 3 A magnified view of section B;

[0033] Figure 5 This is a schematic diagram of the detection component.

[0034] Figure 6 This is a partial sectional view of the reaming head;

[0035] Figure 7 for Figure 6 A magnified view of a portion at point C;

[0036] Figure 8 This is a schematic diagram of the installation of the adjusting block.

[0037] In the diagram: 1. Cabinet; 2. Divider; 3. Gantry; 4. Reaming mechanism; 41. Hydraulic cylinder; 42. Connecting seat; 421. Guide rod; 43. Drive motor; 44. Reaming head; 441. Guide section; 442. Reaming section; 443. Arc groove; 444. Detection groove; 445. Adjustment groove; 446. Liquid guide channel; 45. Detection component; 451. Rotating ring; 452. Arc slider; 45 3. Curved spring; 454. Piston; 455. Magnetic rod; 456. Coil; 46. Lubrication assembly; 461. Liquid distribution tray; 462. Support frame; 463. Adjusting block; 4631. Connecting flow channel; 464. Support spring; 465. Electromagnet; 5. Turntable; 6. Clamping mechanism; 61. Fixed base; 62. Column; 63. Cylinder; 64. Clamping block; 641. Mating groove; 7. Controller. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example: Figures 1-8 As shown, the present invention provides a technical solution for a refrigeration copper tube reaming device based on multi-slot positioning. The refrigeration copper tube reaming device includes a cabinet 1, a divider 2, a gantry frame 3, and a reaming mechanism 4. The divider 2 is fixedly connected to the cabinet 1. The output end of the divider 2 is provided with a turntable 5. Several clamping mechanisms 6 are arranged around the turntable 5. The several clamping mechanisms 6 are used to fix the copper tube. The reaming mechanism 4 is fixedly connected to the gantry frame 3. A controller 7 is provided on one side of the gantry frame 3. The controller 7 is used to control the action of each mechanism.

[0040] Cabinet 1 provides the installation foundation for each mechanism, gantry 3 provides the fixed foundation for the reaming mechanism 4, and divider 2 is the mechanism that realizes intermittent movement. It is used to drive the turntable 5 to rotate intermittently on cabinet 1, thereby driving the clamping mechanism 6 on the turntable 5 to move intermittently at a certain distance, so that the copper tube fixed by the clamping mechanism 6 rotates to a fixed point below the reaming mechanism 4. Therefore, divider 2 can convert continuous rotation into intermittent movement, ensuring that the copper tube is accurately positioned when it stops at the reaming station, avoiding uneven reaming or damage to tools due to deviation. That is, under the control of controller 7, divider 2 and reaming mechanism 4 can cooperate to realize multi-groove positioning processing of copper tubes.

[0041] The reaming mechanism 4 includes a hydraulic cylinder 41, a connecting seat 42, a drive motor 43, and a reaming head 44. The hydraulic cylinder 41 is fixedly connected to the gantry 3, and the output end of the hydraulic cylinder 41 is fixedly connected to the connecting seat 42. The drive motor 43 is fixedly connected to the connecting seat 42, and the output end of the drive motor 43 is connected to the reaming head 44 for transmission. The reaming head 44 is equipped with a detection component 45 and a lubrication component 46. The detection component 45 detects the change in resistance during the reaming process, and the lubrication component 46 can automatically adjust the amount of lubricating oil injected according to the detection result of the detection component 45.

[0042] The reaming mechanism 4 of this application reams the copper tube by rotational extrusion. The hydraulic cylinder 41 is the main power source for the reaming mechanism 4. When the hydraulic cylinder 41 actuates, it drives the connecting seat 42 downwards, causing the drive motor 43 and the reaming head 44 to press downwards into the copper tube, thus reaming the copper tube. The drive motor 43 can drive the reaming head 44 to rotate, thereby improving the uniformity of the reaming process. During the reaming process, an increase in the copper tube wall thickness leads to an increase in the pressure on the cutting tool. That is, when the copper tube wall thickness increases, the resistance of the inner wall of the copper tube to the reaming head 44 increases. This is achieved through inspection... The detection component 45 detects the change in this resistance, which allows the determination of the copper tube wall thickness. However, fixed feed parameters cannot adapt to differences in copper tube wall thickness, which can easily lead to tube cracking. During the reaming process, the accumulation of frictional heat causes the copper tube to soften, affecting dimensional accuracy. By sensing the processing resistance of the reaming head 44 in real time through the detection component 45, the feed speed of the reaming head 44 is dynamically adjusted to ensure that the copper tube is subjected to uniform force during the reaming process. In addition, when the detection component 45 detects that the copper tube wall thickness is large, the linkage lubrication component 46 increases the lubrication amount, thereby avoiding excessive temperature during reaming.

[0043] The connecting seat 42 is provided with a guide rod 421, which is slidably connected to the gantry 3. The reaming head 44 is provided with a guide section 441 and a reaming section 442. The guide section 441 is conical, and the detection component 45 is located at the reaming section 442.

[0044] The guide rod 421 is used to constrain the movement of the connecting seat 42, so that the up and down movement of the connecting seat 42 is more accurate. The tapered guide section 441 facilitates the insertion of the reaming head 44 into the copper tube. The diameter of the reaming section 442 is equivalent to the diameter of the hole to be processed, that is, the detection component 45 located in the reaming section 442 can fit against the inner wall of the copper tube, thereby ensuring detection accuracy.

[0045] The detection assembly 45 includes a rotating ring 451, an arc-shaped slider 452, and an arc-shaped spring 453. The rotating ring 451 is rotatably connected to the reaming head 44. The reaming head 44 has an arc-shaped groove 443 and a detection groove 444 inside. The arc-shaped slider 452 is fastened to the rotating ring 451 and slidably connected to the arc-shaped groove 443. One end of the arc-shaped spring 453 is fastened to the arc-shaped slider 452, and the other end of the arc-shaped spring 453 is fastened to the inner wall of the arc-shaped groove 443. Hydraulic oil is added to the side of the arc-shaped groove 443 away from the arc-shaped spring 453. The arc-shaped groove 443 is connected to the detection groove 444.

[0046] During testing, the outer side of the rotating ring 451 is in contact with the inner wall of the copper tube. Since the reaming head 44 is constantly rotating, the resistance of the copper tube to the reaming head 44 is transmitted to the rotating ring 451. When the wall thickness of the copper tube increases, the resistance of the inner wall of the copper tube to the rotating ring 451 increases, thereby causing the rotating ring to shift to one side. The arc-shaped slider 452 shifts to the same side along the arc-shaped groove 443, and the arc-shaped spring 453 is stretched by force. The hydraulic oil in the arc-shaped groove 443 is pressed into the detection groove 444. Since the greater the wall thickness of the copper tube, the greater the resistance to the rotating ring 451, the longer the distance that the arc-shaped slider 452 shifts, that is, the more hydraulic oil is pressed into the detection groove 444, indicating that the wall thickness of the copper tube is greater.

[0047] The detection assembly 45 also includes a piston 454, a magnetic rod 455, and a coil 456. The piston 454 is slidably connected to the detection groove 444, the magnetic rod 455 is fastened to the piston 454, and the coil 456 is wound around the outer ring of the detection groove 444. The coil 456 is electrically connected to the controller 7. The controller 7 detects that the larger the induced current generated on the coil 456, the greater the thickness of the copper tube.

[0048] Because the thicker the copper tube wall, the more hydraulic oil is pressed into the detection groove 444, the longer the piston 454 is pushed upward by the hydraulic oil, the longer the distance the coil 456 cuts the magnetic field lines, and the larger the induced current generated. That is, the controller 7 detects that the larger the induced current generated on the coil 456, the thicker the copper tube wall. At this time, the controller 7 simultaneously reduces the feed speed of the oil cylinder 41 to reduce the load and prevent the copper tube from cracking. In addition, it also simultaneously reduces the speed of the drive motor 43 to prevent the temperature from getting too high during the hole expansion process.

[0049] The cross-sectional area of ​​the detection groove 444 is smaller than the cross-sectional area of ​​the arc groove 443.

[0050] To improve the accuracy of the detection, Pascal's principle is used to amplify the offset of the rotating ring 451 by setting the cross-sectional area of ​​the detection groove 444 to be smaller than that of the arc groove 443, thereby facilitating the detection.

[0051] The lubrication assembly 46 includes a liquid distribution plate 461, a support frame 462, an adjusting block 463, a support spring 464, and an electromagnet 465. A lubrication pump is installed inside the cabinet 1. The outlet of the lubrication pump is connected to the liquid distribution plate 461. The liquid distribution plate 461 is rotatably connected to the reaming head 44. The liquid distribution plate 461 is fastened to the support frame 462. The upper end of the support frame 462 is fastened to the housing of the drive motor 43. The reaming head 44 is provided with an adjusting groove 445 and a liquid guiding channel 446. The inlet of the liquid guiding channel 446 is connected to the liquid distribution plate 461, and the outlet of the liquid guiding channel 446 faces the inner wall of the copper tube.

[0052] The adjusting block 463 is slidably connected to the adjusting groove 445. The adjusting block 463 is provided with a connecting flow channel 4631. One end of the supporting spring 464 is fastened to the adjusting block 463, and the other end of the supporting spring 464 is fastened to the inner wall of the adjusting groove 445. The electromagnet 465 is fastened to the adjusting groove 445. The electromagnet 465 is located in the adjusting groove 445 on the side away from the supporting spring 464. The electromagnet 465 is electrically connected to the controller 7. The adjusting block 463 is made of ferromagnetic material. The connecting flow channel 4631 is connected to the liquid guiding flow channel 446. The connecting flow channel 4631 and the liquid guiding flow channel 446 are arranged alternately.

[0053] The support frame 462 is fixed on the housing of the drive motor 43, providing support for the liquid distribution plate 461. The liquid distribution plate 461 can guide the cooling oil pumped by the lubrication pump into the reaming head 44. During normal reaming, the cooling oil flows in through the liquid distribution plate 461 and then is sprayed onto the inner wall of the copper tube through the liquid guide channel 446 to cool it down. The staggered arrangement of the connecting channel 4631 and the liquid guide channel 446 makes the flow cross section of the cooling oil small and the flow rate small in the initial state. When the detection component 45 detects that the wall thickness of the copper tube has increased, the controller 7 increases the current transmitted to the electromagnet 465, which increases the magnetic force of the electromagnet 465 and the attraction force on the ferromagnetic adjustment block 463. This causes the adjustment block 463 to shift to one side along the adjustment groove 445, and the support spring 464 is stretched. The overlapping area of ​​the connecting channel 4631 and the liquid guide channel 446 increases, thereby increasing the flow rate of the cooling oil and improving the cooling effect. This realizes the automatic adjustment of the cooling effect according to the wall thickness of the copper tube.

[0054] The clamping mechanism 6 includes a fixed base 61, a column 62, a cylinder 63, and a clamping block 64. The fixed base 61 is fastened to the turntable 5, the column 62 is fastened to the fixed base 61, the column 62 is located at both ends of the fixed base 61, the cylinder 63 is fastened to the column 62, the output end of the cylinder 63 is drivenly connected to the clamping block 64, and the clamping block 64 is slidably connected to the fixed base 61.

[0055] The fixed base 61 is fixed on the turntable 5 to provide stable support for the clamping mechanism 6. When feeding, the copper tube is placed between the two clamping blocks 64. Then, the cylinder 63 is activated to move the clamping blocks 64 to position and clamp the copper tube to prevent the copper tube from moving during hole enlargement.

[0056] The clamping block 64 is provided with a mating groove 641, which is semi-circular.

[0057] The semi-circular fitting groove 641 matches the shape of the copper tube, allowing it to be better clamped.

[0058] The working principle of this invention is as follows: Under the control of the controller 7, the divider 2 and the reaming mechanism 4 cooperate to achieve multi-groove positioning of the copper tube. During reaming, the hydraulic cylinder 41 is activated, driving the connecting seat 42 to move downward, so that the drive motor 43 and the reaming head 44 are pressed downward into the copper tube to ream the copper tube. During detection, since the reaming head 44 is constantly rotating, the resistance of the copper tube to the reaming head 44 is transmitted to the rotating ring 451. When the wall thickness of the copper tube increases, the resistance of the inner wall of the copper tube to the rotating ring 451 will increase, thereby causing the rotating ring to shift to one side. The arc-shaped slider 452 shifts to the same side along the arc-shaped groove 443, and the arc-shaped spring 453 is stretched. The hydraulic oil in the arc-shaped groove 443 is pressed into the detection groove 444. Because the wall thickness of the copper tube is greater, more hydraulic oil is pressed into the detection groove 444. The piston 454 is hydraulically... The longer the distance the oil pressure pushes upward, the longer the distance the coil 456 cuts the magnetic field lines, and the larger the induced current generated. That is, the larger the induced current generated on the coil 456 detected by the controller 7, the larger the wall thickness of the copper tube. At this time, the controller 7 simultaneously reduces the feed speed of the oil cylinder 41 to reduce the load and prevent the copper tube from cracking. In addition, it also simultaneously reduces the speed of the drive motor 43 to prevent the temperature from getting too high due to friction during the hole expansion process. At the same time, the controller 7 increases the current transmitted to the electromagnet 465, which increases the magnetic force of the electromagnet 465 and the attraction force on the ferromagnetic adjustment block 463. This causes the adjustment block 463 to shift to one side along the adjustment groove 445, increasing the overlapping area of ​​the connecting flow channel 4631 and the liquid guiding flow channel 446, thereby increasing the flow rate of the cooling oil and improving the cooling effect.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for expanding the bore of a cooling copper tube based on multi-slot positioning, characterized in that: The refrigeration copper pipe expansion device includes a cabinet (1), a divider (2), a gantry frame (3), and an expansion mechanism (4). The divider (2) is fixedly connected to the cabinet (1). The output end of the divider (2) is provided with a turntable (5). Several clamping mechanisms (6) are arranged around the turntable (5). The clamping mechanisms (6) are used to fix the copper pipe. The expansion mechanism (4) is fixedly connected to the gantry frame (3). A controller (7) is provided on one side of the gantry frame (3). The controller (7) is used to control the action of each mechanism. The hole-expanding mechanism (4) includes a hydraulic cylinder (41), a connecting seat (42), a drive motor (43), and an expanding head (44). The hydraulic cylinder (41) is fastened to the gantry frame (3), and the output end of the hydraulic cylinder (41) is fastened to the connecting seat (42). The drive motor (43) is fastened to the connecting seat (42), and the output end of the drive motor (43) is driven to the expanding head (44). The expanding head (44) is provided with a detection component (45) and a lubrication component (46). The detection component (45) detects the change in resistance during the hole-expanding process, and the lubrication component (46) can automatically adjust the amount of lubricating oil injected according to the detection result of the detection component (45).

2. The refrigeration copper tube enlargement device based on multi-slot positioning according to claim 1, characterized in that: The connecting seat (42) is provided with a guide rod (421), which is slidably connected to the gantry (3). The reaming head (44) is provided with a guide section (441) and a reaming section (442). The guide section (441) is conical, and the detection component (45) is located at the reaming section (442).

3. The refrigeration copper tube enlargement device based on multi-slot positioning according to claim 1, characterized in that: The detection component (45) includes a rotating ring (451), an arc-shaped slider (452), and an arc-shaped spring (453). The rotating ring (451) is rotatably connected to the reaming head (44). The reaming head (44) is provided with an arc-shaped groove (443) and a detection groove (444). The arc-shaped slider (452) is fastened to the rotating ring (451) and slidably connected to the arc-shaped groove (443). One end of the arc-shaped spring (453) is fastened to the arc-shaped slider (452), and the other end of the arc-shaped spring (453) is fastened to the inner wall of the arc-shaped groove (443). Hydraulic oil is added to the side of the arc-shaped groove (443) away from the arc-shaped spring (453). The arc-shaped groove (443) is connected to the detection groove (444).

4. The refrigeration copper tube enlargement device based on multi-slot positioning according to claim 3, characterized in that: The detection assembly (45) further includes a piston (454), a magnetic rod (455), and a coil (456). The piston (454) is slidably connected to the detection groove (444), the magnetic rod (455) is fastened to the piston (454), and the coil (456) is wound around the outer ring of the detection groove (444). The coil (456) is electrically connected to the controller (7). The controller (7) detects that the larger the induced current generated on the coil (456), the larger the thickness of the copper tube.

5. The refrigeration copper tube enlargement device based on multi-slot positioning according to claim 4, characterized in that: The cross-sectional area of ​​the detection groove (444) is smaller than that of the arc groove (443).

6. The refrigeration copper tube enlargement device based on multi-slot positioning according to claim 5, characterized in that: The lubrication assembly (46) includes a liquid distribution plate (461), a support frame (462), an adjusting block (463), a support spring (464), and an electromagnet (465). The cabinet (1) is equipped with a lubrication pump. The outlet of the lubrication pump is connected to the liquid distribution plate (461). The liquid distribution plate (461) is rotatably connected to the reaming head (44). The liquid distribution plate (461) is fastened to the support frame (462). The upper end of the support frame (462) is fastened to the housing of the drive motor (43). The reaming head (44) is equipped with an adjusting groove (445) and a liquid guiding channel (446). The inlet of the liquid guiding channel (446) is connected to the liquid distribution plate (461), and the outlet of the liquid guiding channel (446) faces the inner wall of the copper tube. The adjusting block (463) is slidably connected to the adjusting groove (445). The adjusting block (463) is provided with a connecting flow channel (4631). One end of the supporting spring (464) is fastened to the adjusting block (463), and the other end of the supporting spring (464) is fastened to the inner wall of the adjusting groove (445). The electromagnet (465) is fastened to the adjusting groove (445). The electromagnet (465) is located in the adjusting groove (445) on the side away from the supporting spring (464). The electromagnet (465) is electrically connected to the controller (7). The adjusting block (463) is made of ferromagnetic material. The connecting flow channel (4631) is connected to the liquid guiding flow channel (446). The connecting flow channel (4631) and the liquid guiding flow channel (446) are arranged alternately.

7. The refrigeration copper tube enlargement device based on multi-slot positioning according to claim 1, characterized in that: The clamping mechanism (6) includes a fixed base (61), a column (62), a cylinder (63), and a clamping block (64). The fixed base (61) is fastened to the turntable (5). The column (62) is fastened to the fixed base (61) and is located at both ends of the fixed base (61). The cylinder (63) is fastened to the column (62). The output end of the cylinder (63) is connected to the clamping block (64) in a transmission manner. The clamping block (64) is slidably connected to the fixed base (61).

8. The refrigeration copper tube enlargement device based on multi-slot positioning according to claim 7, characterized in that: The clamping block (64) is provided with a mating groove (641), which is semi-circular.

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