A copper rod straightening apparatus and a straightening method

Abstract

This invention discloses a copper rod straightening device and method, belonging to the field of copper rod straightening technology. The invention employs 180℃-200℃ medium-frequency induction preheating to reduce the yield strength of the copper rod, achieving gentle hot straightening and eliminating the indentation and micro-crack problems associated with cold straightening. A combination of spray precooling and immersion slow cooling is used, with the heat transfer intensity of spray cooling falling between that of air cooling and water immersion; it acts as an excellent precooling buffer zone. First, the surface temperature of the copper rod is gently reduced to 60℃-70℃, initially narrowing the internal and external temperature difference. Then, it enters a water tank in a relatively stable state for constant and gentle cooling at a water temperature of 40℃-50℃. The stable water temperature means there are no drastic phase change disturbances, and the water quality is clear and stable. In this environment, the copper rod is cooled quietly without suffering any chemical attack.

Description

Technical Field

[0001] This invention relates to the field of copper rod straightening, and particularly to a copper rod straightening device and straightening method. Background Technology

[0002] Copper rods are a crucial raw material for the wire and cable, magnet wire, and electrical appliance industries. After continuous casting, rolling, or drawing, defects such as poor straightness and excessive ovality often occur due to uneven cooling, residual stress release, and fluctuations in winding tension. To ensure dimensional accuracy and product performance in subsequent deep processing (such as stranding and extruding insulation layers), copper rods must undergo straightening treatment.

[0003] Currently, the commonly used copper rod straightening methods in the industry are mainly divided into two categories: cold straightening and hot straightening. Cold straightening often uses multi-roller straighteners, relying on mechanical roller pressure to forcibly eliminate bending. However, copper is relatively soft, and straightening in a cold state easily leads to surface indentations and orange peel-like damage, and in severe cases, even micro-cracks, affecting conductivity and subsequent processing yield. Hot straightening involves heating the copper rod to above its recrystallization temperature before straightening. While this can reduce deformation resistance and surface damage, existing hot straightening equipment generally uses water cooling, which involves directly immersing the straightened copper rod in water. As soon as the copper rod enters the water, a large amount of steam is instantly generated on the surface, forming a steam film that tightly wraps the copper rod. Under this film, the cooling rate varies greatly in different parts of the copper rod—some areas cool down quickly, while areas enveloped by steam cool down slowly. In ordinary cooling water containing trace amounts of electrolytes, this temperature difference plus the electrolyte will instantly create thousands of micro-thermal potential differences on the surface of the copper rod. As the current flows from high potential to low potential, severe electrochemical corrosion and oxidation occur in the low potential areas, ultimately leaving water stains and spots on the surface of the copper rod that are difficult to wash off. Summary of the Invention

[0004] This invention provides a copper rod straightening device and method, which can solve the problem that water cooling methods in the prior art easily leave water stains and spots on the surface of copper rods that are difficult to wash off.

[0005] A copper rod straightening device includes a preheating mechanism, a straightening mechanism, and a cooling mechanism arranged sequentially along the copper rod's travel direction; the preheating mechanism uses a medium-frequency induction coil, which is used to heat the copper rod passing through it to 180℃-200℃; The cooling mechanism includes a spray water cooling module, an immersion water cooling module, and a blowing drying module arranged sequentially. The spray water cooling module is used to reduce the surface temperature of the copper rod to 60℃-80℃, and the immersion water cooling module reduces the overall temperature of the copper rod to 30℃-40℃. The spray water cooling module includes a spray ring through which a copper rod passes, and a high-pressure atomizing nozzle is installed on the inner wall of the spray ring. The immersion water cooling module includes a strip-shaped water tank, and openings for the copper rod to pass through are provided on the opposite side walls of the water tank. The blowing drying module includes an air jet ring, and a plurality of air jet nozzles arranged in a ring are installed on the inner wall of the air jet ring.

[0006] Furthermore, a water collection tank is provided at both ends of the water tank, and the water collection tank is located at an opening on the end face of the water tank; a return water pipe is connected to the bottom side of the water collection tank, and the return water pipe is connected to the top of the spray tank. The spray tank is equipped with a pumping system for pumping the cooling water in the spray tank to the spray ring.

[0007] Furthermore, a partition is provided inside the water tank, and the partition can move along the length of the water tank; the partition has a second opening for the copper rod to pass through, and a sealing strip is provided on the periphery of the partition to seal against the inner wall of the water tank; flanges are provided on both sides of the water tank along its length, and U-shaped locking blocks are provided at both ends of the top of the partition, with a locking bolt threaded to one side wall of the U-shaped locking block, the end of which abuts against the bottom side of the flange; multiple guide members are provided on the bottom side or inner wall of the water tank along its length, and the guide members include a pair of guide blocks spaced apart, with a guide slope provided on the top surface of the opposite side of the two guide blocks, and the bottom end of the partition is inserted between the two guide blocks; a drain pipe is provided on at least one side of the water tank, and a plug is detachably provided at the open end of the drain pipe, and the drain pipe is connected to the top of the spray tank through a second return water pipe.

[0008] Furthermore, a scraper ring is provided in the water collection tank located at the end of the water tank or at the discharge end of the water tank, and the inner wall surface of the scraper ring is provided with annular scraper fins.

[0009] Furthermore, the liquid level in the water tank is higher than the top of the opening.

[0010] Furthermore, a waxing mechanism is also provided in the preheating mechanism and the straightening mechanism.

[0011] Furthermore, a dewaxing mechanism is provided between the straightening mechanism and the cooling mechanism; the dewaxing mechanism includes a box body 50, the top of the box body 50 is covered with an insulated cover plate 55, and the two ends of the box body 50 are provided with openings two for the copper rod 100 to pass through. The inner bottom side of the box body is fixed with a dewaxing assembly by a support column. The dewaxing assembly includes a groove with an open top, and a pair of partition plates are provided in the groove. Melting areas are formed on both sides of the pair of partition plates, and a rinsing area is formed between the pair of partition plates. Openings three and four are formed concentrically on both ends of the groove body and on the partition plates. A cover plate is provided on the top of the rinsing area, a drain hole is opened at the bottom of the rinsing area, a rinsing nozzle is installed on the inner wall of the rinsing area, and a drain pipe is provided on one side wall of the box body. It also includes a liquid pump used to continuously pump water from inside the tank into the melting zone.

[0012] Furthermore, a heat recovery cover 1 and a heat recovery cover 2 are respectively provided on both sides of the intermediate frequency induction coil and are interconnected. The heat recovery cover 1 and the heat recovery cover 2 are connected by multiple connecting pipes surrounding the intermediate frequency induction coil. In use, the copper rod 100 passes through the heat recovery cover 1, the intermediate frequency induction coil and the heat recovery cover 2 in sequence. The heat recovery cover 1 and the heat recovery cover 2 are respectively provided with an air inlet and an air outlet. The air outlet is connected to an air pump in sequence. The air pump is connected to the air jet ring through a heating pipe set at the bottom of the box 50 or inside the melting area.

[0013] Furthermore, a cleaning structure is provided on one side of each metal straightening roller in the straightening mechanism. The cleaning structure includes a semi-circular cover, with blowing nozzles at both ends of the cover. The blowing nozzles blow out a fan-shaped airflow. A negative pressure port is provided on the cover between the two blowing nozzles. The negative pressure port is connected to a cooling interception device, and the cooling interception device is connected to the negative pressure device.

[0014] Furthermore, the heat recovery cover 2 is connected to the air pump 2 through the second exhaust port at its end, and the air pump 2 is connected to the purging nozzle. The high-temperature airflow ejected from the purging nozzle blows onto the surface of the metal straightening roller.

[0015] A method for straightening a copper rod, characterized by comprising: Step 1: Start the equipment, set the target wire diameter to Φ12mm, and the preheating temperature to 190℃.

[0016] Step 2: Control the copper rod to enter the intermediate frequency induction coil after passing through the wire feeding mechanism, and heat it up to 190℃ within 2 seconds.

[0017] Step 3: The heated copper rod (100) is fed into the straightening mechanism, and the copper rod is straightened by multiple sets of straightening rollers arranged in an alternating manner at multiple points. Step 4: The straightened copper rod is sent into the cooling mechanism for segmented gradient cooling.

[0018] This invention employs 180℃-200℃ medium-frequency induction preheating to reduce the yield strength of the copper rod, achieving gentle hot straightening and eliminating the indentation and micro-crack problems associated with cold straightening. The combined cooling system of spray precooling and immersion slow cooling provides a heat transfer intensity between air cooling and water immersion, acting as an excellent precooling buffer. The surface temperature of the copper rod is gently reduced to 60℃-70℃, initially narrowing the internal and external temperature difference. Then, it enters a water tank in a relatively stable state for constant and gentle cooling at a water temperature of 40℃-50℃. The stable water temperature means there are no drastic phase change disturbances, and the water quality is clear and stable. In this environment, the copper rod is cooled quietly without suffering any chemical attack. Attached Figure Description

[0019] Figure 1 The present invention provides a schematic diagram of the structure of a copper rod straightening device. Figure 1 ; Figure 2 Provided for the present invention Figure 1 Enlarged view of a section at point B in the middle; Figure 3 A schematic diagram of a heat recovery hood is provided for this invention; Figure 4 Provided for the present invention Figure 1 The main view; Figure 5 The present invention provides a schematic diagram of the structure of a copper rod straightening device. Figure 2 ; Figure 6 A schematic diagram of the cleaning structure is provided for this invention; Figure 7 A schematic diagram of the cooling interception device structure is provided for this invention; Figure 8 A schematic diagram of the mating structure of the cover plate and the cooling plate is provided for this invention; Figure 9 A schematic diagram of the dewaxing mechanism is provided for this invention; Figure 10 Provided for the present invention Figure 9 sectional view Explanation of reference numerals in the attached figures: 1-Preheating mechanism, 2-Straightening mechanism, 3-Cooling mechanism, 4-Waxing mechanism, 5-Wax removal mechanism, 7-Semi-circular cover, 30-Spray water-cooling module, 31-Immersion water-cooling module, 32-Blowing drying module, 33-Scraper ring, 50-Box body, 51-Opening two, 52-Tank body, 53-Divider plate, 54-Drain pipe, 55-Insulation cover plate, 60-Heat recovery cover one, 61-Heat recovery cover two, 62-Connecting pipe, 71-Purge nozzle, 72-Negative pressure port, 73-Cooling interception device, 310-Water tank, 311-Opening one, 312-Water collection tank, 313-Return water Pipe 1, 314-partition, 3101-flanged edge, 3102-guide block, 3103-guide slope, 3104-drain pipe, 3141-opening 2, 3142-U-shaped clip, 521-opening 3, 530-cover plate, 531-opening 4, 532-drain hole, 533-rinsing nozzle, 600-insulation layer, 601-metal inner pipe, 602-metal outer pipe, 603-annular end plate, 730-interception chamber, 731-inlet port, 732-exhaust port, 733-cover plate, 734-first cooling plate, 735-second cooling plate, 100-copper rod. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 4 As shown in the figure, an embodiment of the present invention provides a copper rod straightening device. The device is located behind the copper rod unwinding device. The copper rod 100 is pulled out from the copper rod unwinding device and controlled to move horizontally. The copper rod straightening device is set on the horizontal movement path of the copper rod 100. Specifically, it includes a preheating mechanism 1, a straightening mechanism 2, and a cooling mechanism 3 arranged sequentially along the travel direction of the copper rod 100. The preheating mechanism 1 uses a medium-frequency induction coil to heat the copper rod 100 passing through it to 180°C-200°C, reducing the yield strength of copper. This allows for plastic deformation to be completed with a smaller bending moment and clamping force, making straightening easier. Uniform induction preheating makes the material temperature field more consistent, reduces local hard spots, and makes the bending deformation in the subsequent multi-stage straightening mechanism more uniform, reducing the rebound or re-bending of the copper rod due to the release of internal stress after straightening.

[0022] During straightening, the copper rod is heated to 180℃-200℃. Although the temperature is not high, if it is directly wound at this temperature, the copper rod is relatively soft and the layers are easily deformed by mutual pressure. Furthermore, slight adhesion or serpentine displacement may occur under winding tension. Based on this requirement, the present invention cools the copper rod 100 after straightening. The cooling mechanism 3 includes a spray water cooling module 30 and an immersion water cooling module 31 arranged in sequence.

[0023] The spray water cooling module 30 includes a copper rod 100 passing through a spray ring inside it. A high-pressure atomizing nozzle is installed on the inner wall of the spray ring. The spray water cooling module 30 is used to reduce the surface temperature of the copper rod 100 to 60℃-80℃. The immersion water cooling module 31 includes a strip-shaped water tank 310. Openings 311 for the copper rod 100 to pass through are provided on the opposite side walls of the water tank 310. The immersion water cooling module 31 reduces the overall temperature of the copper rod 100 to 30℃-40℃.

[0024] When the copper rod is wound, it is tightly wound layer by layer onto the I-beam reel. Without efficient air drying, even a tiny amount of moisture remaining in the micro-grooves on the surface of the copper rod will undergo capillary action under the immense pressure of winding, allowing the moisture to seep laterally along the micro-gaps on the surface of the copper rod. Once it enters the interlayer, in a closed, oxygen-deficient but high-humidity environment, the copper rod will rapidly undergo severe interlayer oxidation and blackening. Therefore, after cooling, the surface of the copper rod 100 needs to be dried. To improve the drying effect, this invention provides an air drying module 32 behind the immersion water cooling module 31. The air drying module 32 includes an air jet ring, and several annularly distributed air jet nozzles are installed on the inner wall of the air jet ring. The high-speed airflow generated by the annular nozzles 321 can not only peel off macroscopic water droplets, but also generate a very strong negative pressure suction effect, completely forcing out and blowing away the residual moisture in the micro-textures of the copper rod surface.

[0025] The core of this invention lies in the fact that the high-pressure water mist sprayed on the surface of the copper rod 100 forcibly breaks the vapor film as soon as it emerges. This ensures that the surface of the copper rod 100 remains in direct contact with the water, resulting in a highly consistent cooling rate across the entire surface. The heat transfer intensity of the spray cooling is between that of air cooling and immersion. It acts as an excellent pre-cooling buffer zone, gently reducing the surface temperature of the copper rod 100 to 60℃-70℃, initially narrowing the temperature difference between the inside and outside. Then, it enters the water tank in a relatively stable state for constant and gentle cooling at a water temperature of 40℃-50℃. The stable water temperature means there are no violent phase change disturbances, and the water quality is clear and stable. In this environment, the copper rod 100 is cooled quietly without suffering any chemical attack.

[0026] To control the copper rod 100 to pass horizontally through the water tank 310, and to control the copper rod 100 to pass below the liquid surface in the water tank 310 while submerged, as follows: Figure 1-2In this technical solution, water collection tanks 312 are provided at both ends of the water tank 310. The water collection tanks 312 are located at the opening 311 on the end face of the water tank 310. The liquid level in the water tank 310 is higher than the top of the opening 311. During the cooling process, the cooling water in the water tank 310 flows out to the outside through the gap formed by the opening 311 and the copper rod 100 and is collected by the water collection tank 312. The bottom side of the water collection tank 312 is connected to the return water pipe 313. The return water pipe 313 is connected to the top of the spray tank. The spray tank pumps its internal cooling water into the spray ring through its internal pumping system, thereby reducing water waste.

[0027] It is known that in actual production, copper rods 100 of different diameters need to be produced. When heating and straightening copper rods 100 of different diameters, in order to match the different diameters of the copper rods 100, and to control the duration of the copper rods 100 immersed in the liquid while controlling the copper rods 100 to move forward at the same speed, this invention uses a partition 314 set in the water tank 310. The partition 314 can move along the length of the water tank 310 and be fixed in any position. The partition 314 has an opening 3141 for the copper rods 100 to pass through. A sealing strip is set on the periphery of the partition 314 to seal with the inner wall of the water tank 310. That is, by controlling the movement of the partition 314, the actual length of water stored in the water tank 310 is controlled, and the length of the water passage path of the copper rods 100 in the water tank 310 is controlled, ultimately achieving the adjustment of the water passage time and cooling effect of the copper rods 100.

[0028] like Figure 1-2 To facilitate installation of the baffle 314 at any desired location, flanges 3101 are provided along the length of both sides of the water tank 310. U-shaped locking blocks 3142 are located at both ends of the top of the baffle 314. A locking bolt with its end abutting against the bottom side of the flange 3101 is threaded onto one side wall of the U-shaped locking block 3142. Tightening the locking bolt allows the baffle 314 to be installed at any position. During use, this prevents the baffle 314 from being "pushed" or "tilted" due to lateral force caused by water pressure. To prevent the partition plate 314 from being "pushed off" or "flying away," multiple guide components are provided along the length of the bottom side or inner wall of the water tank 310. The guide components include a pair of guide blocks 3102 spaced apart. Each of the two guide blocks 3102 has a guide slope 3103 on its opposite top surface. The bottom end of the partition plate 314 is inserted between the two guide blocks 3102. The pair of guide blocks 3102 spaced apart superficially serve a guiding function, but in reality, they serve a supporting function to prevent the partition plate 314 from being "pushed off" or "flying away" due to excessive lateral water pressure difference.

[0029] A drain pipe 3104 is provided on at least one side of the water tank 310. The open end of the drain pipe 3104 is detachably equipped with a plug. The drain pipe 3104 is connected to the top of the spray tank through the return water pipe 2 to realize drainage as needed. When the water tank 310 is fully used, the partition 314 is removed and the plug is used to block the open end of the drain pipe 3104. At this time, the water tank 310 is full of water. Conversely, when the water tank 310 is partially used, the plug is opened.

[0030] To reduce the drying pressure of the subsequent blowing drying module 32 and improve the drying effect, such as Figure 1-2 A scraper ring 33 is installed at the end of the water tank 310 or in the water collection tank 312 at the discharge end of the water tank 310. The inner wall of the scraper ring 33 is provided with annular scraper fins, which apply slight contact pressure to the surface of the copper rod, just like a car windshield wiper, instantly breaking the surface tension of the water and forcibly scraping more than 90% of the free water adhering to the surface of the copper rod back into the water tank. This greatly reduces the load on the subsequent air drying module.

[0031] The straightening methods based on the above-mentioned equipment include: Start the equipment, set the target wire diameter to Φ12mm, and the preheating temperature to 190℃.

[0032] The copper rod enters the intermediate frequency induction coil through the wire feeding mechanism and heats up to 190°C within 2 seconds.

[0033] The heated copper rod (100) is fed into the straightening mechanism (2). Taking advantage of the characteristic that the copper rod is plastically enhanced at high temperature, the copper rod is straightened by multiple sets of straightening rollers arranged in an alternating manner at multiple points. The straightened copper rod enters the cooling mechanism (3) for segmented gradient cooling to avoid bending deformation caused by rapid cooling.

[0034] In one possible implementation, to prevent oxidation of the high-temperature copper rod 100 due to humid air during straightening, and because the copper rod 100 at temperatures above 100°C has relatively low hardness and is prone to microscopic adhesive wear when forcibly pressed against the metal straightening rollers, which would not only scratch the surface of the copper rod but also affect the straightening accuracy, this implementation, such as Figure 5In addition to the preheating mechanism 1 and the straightening mechanism 2, a waxing mechanism 4 is also provided. The waxing mechanism (4) includes a wax immersion tank, which is filled with molten protective wax liquid to maintain the temperature at about 95°C. The copper rod (100) passes horizontally through the wax liquid, and the waxing mechanism 4 applies wax to the surface of the copper rod 100. Under the heating and flowing action of the high-temperature copper rod 100, the wax liquid melts instantly and fills the micropores on the surface of the copper rod by means of surface tension. The molten liquid wax can form a tough solid lubricating film on the surface of the copper rod. This film can withstand extremely high pressure, form a physical barrier between the straightening roller and the copper rod, greatly reduce friction, protect the surface smoothness of the copper rod, and extend the service life of the straightening roller by several times. At the same time, through the action of waxing, a dense protective film is formed on the surface of the copper rod 100, which effectively isolates oxygen in the air and prevents the copper rod 100 from being oxidized by prolonged contact with humid air at high temperature.

[0035] After straightening is completed, if the copper rod 100 with a wax film on its surface directly enters the spray water cooling module 30, the water flow sprayed from the high-pressure atomizing nozzle will directly act on the copper rod 100. At this time, the wax on the copper rod 100 will be dispersed and washed away, dripping into the environment or onto the spray ring. Therefore, in this technical solution, a wax removal mechanism 5 is also provided between the straightening mechanism 2 and the cooling mechanism 3. The wax removal mechanism 5 removes the wax on the surface of the copper rod 100 before it enters the spray water cooling module 30, thus avoiding the aforementioned dripping problem.

[0036] Specifically, such as Figure 9-10 The dewaxing mechanism 5 in this technical solution includes a strip-shaped box 50, with an insulated cover 55 covering the top of the box 50. Two openings 51 are provided at both ends of the box 50 for the copper rod 100 to pass through. A dewaxing assembly is fixed to the inner bottom side of the box 50 by a support column. The dewaxing assembly includes a top-opening groove 52, with a pair of partition plates 53 inside the groove 52. Melting areas are formed on both sides of the partition plates 53, and a rinsing area is formed between the partition plates 53. Two openings 521 and 531 are concentrically arranged at both ends of the groove 52 and on the partition plates 53, respectively. A cover 530 is provided on the top of the rinsing area, and a drain hole 532 is provided at the bottom of the rinsing area. A rinsing nozzle 533 is installed on the inner wall of the rinsing area. A drain pipe 54 is provided on one side wall of the box 50, with the drain pipe 54 lower than the opening height of the second opening 51. High-temperature water is injected into the melting area, and the high-temperature water is used to melt the wax and remove it from the surface of the copper rod.

[0037] When in use, when the copper rod 100 with wax on its surface enters the first melting zone, the wax on the copper rod 100 melts under the action of high temperature water. Most of the wax floats on the surface of the liquid, and a small part is carried out with the copper rod 100. The wax carried out is flushed down by the flushing nozzle 533 and falls into the bottom of the tank 50. During use, the drain pipe 54 is opened periodically to release the water containing wax in the upper layer of the tank 50.

[0038] In this scheme, a liquid pump is used to continuously pump water from the tank 50 to the melting area. At the same time, water from the melting area will also continuously flow back to the bottom of the tank 50 through the openings 3 521 and 4 531 on both sides. Furthermore, a high-pressure water pump is used to continuously pump water from the tank 50 to the rinsing nozzle 533.

[0039] It is known that after the drain pipe 54 is opened to drain water, an equal amount of water needs to be injected into the tank 50 through the water injection pipe 55 set on the side wall of the tank 50. Since the injected water is room temperature water, the water temperature inside the tank 50 will drop sharply after the room temperature water is injected into the bottom of the tank 50. When the low temperature water inside the tank 50 is injected into the melting area, it will affect the water temperature in the melting area, and thus affect the melting effect on the surface wax of the copper rod 100. Therefore, the present invention also sets a heating pipe at the bottom of the tank 50 or inside the melting area. The heat source of the heating pipe comes from the residual heat of the medium frequency induction coil.

[0040] Specifically, when the heating element is installed at the bottom of the tank 50, it heats the water at the bottom of the tank 50 as a whole; when the heating element is installed inside the melting area, it heats the inside of the melting area. In general, the water is heated by the heating element before it can enter the bottom of the tank 50 or the melting area.

[0041] Therefore, the heating tube includes inner and outer sleeves that are nested together. High-temperature gas flows through the inner and outer sleeves, and water is introduced through the inner sleeve. When the high-temperature gas and water flow synchronously, heat exchange is carried out using the inner sleeve, and the high-temperature gas heats the water.

[0042] Similarly, during long-term use, the amount of wax inside the melting zone gradually increases. In order to drain the wax from the melting zone in a timely manner, the water pumped into the melting zone is increased for a short period of time during use to control the liquid level inside the melting zone to be higher than the top of the tank 52. At this time, the high-temperature water rich in wax at the top of the melting zone overflows from the opening end of the tank 52. After overflowing for 10 seconds, the water pumped into the melting zone is reduced until it returns to normal. The wax is collected and recycled into the tank 50 through the overflow, and then centrally processed.

[0043] In this invention, the water containing wax liquid in the upper layer of the box 50 can be released and cooled to recover the wax. The recovered wax can then be sent back to the waxing mechanism 4 for recycling, and the water can also be recycled.

[0044] It should be noted that in this invention, after the copper rod 100 is cooled by the spray water cooling module 30 and the immersion water cooling module 31 in the cooling mechanism 3, water will adhere to the surface of the copper rod 100 after it has been immersed in water. This water will be dried by the air drying module 32 in actual operation. In order to improve the drying effect of the air drying module 32 on the copper rod 100, hot air is used in this embodiment. The heat source of the hot air comes from the residual heat of the intermediate frequency induction coil.

[0045] In summary, in this implementation method, such as Figure 1 and 3 Two interconnected heat recovery covers, 60 and 61, are installed on either side of the intermediate frequency induction coil. These covers are connected by multiple connecting pipes 62 that encircle the intermediate frequency induction coil. During operation, the copper rod 100 passes sequentially through the heat recovery cover 60, the intermediate frequency induction coil, and the heat recovery cover 61. An air inlet is located on the side of the heat recovery cover 60 furthest from the intermediate frequency induction coil, and a filter is installed at the air inlet. Simultaneously, an exhaust port is located on the side of the heat recovery cover 61 furthest from the intermediate frequency induction coil. The heating tube is connected to one end of the outer tube of the heating tube via an insulation pipe, and the other end of the outer tube is connected to an air pump. The outlet of the air pump is connected to the air jet ring. At this time, the ambient air enters the heat recovery hood 1 60 after passing through the filter cotton, and then enters the heat recovery hood 2 61 through the connecting pipe 62. After that, it enters the outer tube through the insulation pipe. Heat exchange is completed in the outer tube to form a cooling effect. The cooled air at 80°C is sent in and then sprayed out through the air jet nozzle set on the inner wall. The high-temperature airflow sprayed out by the air jet nozzle dries the surface of the copper rod 100.

[0046] It is understood that, in order to utilize the aforementioned heat recovery shroud 60 and heat recovery shroud 61 to achieve waste heat recovery for air heating, such as Figure 1 and 3 The heat recovery cover 60 and the heat recovery cover 61 have the same structure. They both include an inner metal tube 601 that is nested together and an outer metal tube 602 with an insulation layer 600 on its inner wall. The outer metal tube 602 and the inner metal tube 601 are connected by two annular end plates 603 located at both ends. The inner and outer rings of the annular end plates 603 are welded to the outer metal tube 602 and the inner metal tube 601, respectively.

[0047] As described above, due to the presence of the waxing mechanism 4, a large amount of wax will remain on the surface of the metal straightening roller after long-term operation. If this wax is not cleaned in time, it will accumulate on the surface of the metal straightening roller, which may cause slippage between the metal straightening roller and the copper rod 100. Therefore, it is necessary to remove the wax adhering to the surface of the metal straightening roller in time during use.

[0048] Therefore, the present invention requires a cleaning structure on one side of each metal straightening roller to promptly remove the wax from the surface of the metal straightening roller, preventing the wax from accumulating on the surface of the metal straightening roller over a long period of time. Specifically, the cleaning structure provided by the present invention includes a semi-circular cover 7, with blowing nozzles 71 at both ends of the cover 7. The blowing nozzles 71 blow out a fan-shaped airflow. A negative pressure port 72 is provided on the cover 7 between the two blowing nozzles 71. The negative pressure port 72 is connected to a cooling interception device 73, and the cooling interception device 73 is connected to a negative pressure device. The blowing nozzles 71... The hot air is emitted from the heat recovery hood 61. The heat recovery hood 61 is connected to the air pump 2 through the second exhaust port at its end. The air pump 2 is connected to the purging nozzle 71. The high-temperature airflow ejected from the purging nozzle 71 blows onto the surface of the metal straightening roller. Utilizing the high temperature and high speed characteristics of the airflow, the wax liquid on the surface of the metal straightening roller splashes and spreads into the closed space formed by the hood 7 and the metal straightening roller. At this time, under the action of the negative pressure device, the airflow containing wax liquid is drawn into the cooling interception device 73. Inside the cooling interception device 73, the wax liquid cools and solidifies, and the gas is discharged.

[0049] like Figure 7-8 The cooling interception device 73, during use, cools and intercepts the wax liquid carried in the hot air, preventing it from being directly discharged into the air from the exhaust end of the negative pressure device 74. In this technical context, the cooling interception device 73 includes an open-top interception chamber 730. An air inlet 731 and an exhaust 732 are respectively provided at both ends of the interception chamber 730. A cover plate 733 is sealed and installed over the interception chamber. A first cooling plate 734 and a second cooling plate 735 are alternately arranged on the bottom side of the cover plate 733, forming an air passageway between the second cooling plate 735 and the cover plate 733. The bottom end of the first cooling plate 734 and the interception chamber... An air passage is formed between the bottom and side surfaces of 730. After the gas is introduced from the air inlet 731, it alternately passes through all the air passages 1 and 2 and is discharged from the exhaust port 732. During the process of the gas flowing through the interception chamber 730, it frequently comes into contact with the first cooling plate 734 and the second cooling plate 735 for cooling. The wax solidifies on the contact surface between the first cooling plate 734 and the second cooling plate 735. The wax layer formed can be scraped off by periodically removing the cover plate 733. In order to continuously cool, the first cooling plate 734 and the second cooling plate 735 have the same structure and are provided with cooling channels inside. Cold water is continuously introduced into the cooling channels during use.

[0050] Specifically, in order to obtain a uniform wax layer by applying wax to the surface of the copper rod 100, in one possible technical solution, the waxing mechanism includes a wax immersion tank containing molten protective wax at a constant temperature. When the copper rod (100) passes horizontally through the wax immersion tank, the heat of the copper rod 100 itself and the temperature of the wax liquid are used to make the wax liquid adhere evenly to the surface of the copper rod 100, forming a dense protective film. In order to prevent the wax layer from being too thick and making it difficult to peel off later, a wax scraping component is provided at the outlet end of the wax immersion tank. In this embodiment, the wax scraping component adopts two semi-circular elastic scraping rings, which are tightly attached to the surface of the copper rod (100) and can scrape off excess wax liquid and return it to the wax immersion tank, ensuring that the thickness of the wax film on the surface of the copper rod is controlled at about 0.05 mm.

[0051] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A copper rod straightening device, characterized in that, It includes a preheating mechanism (1), a straightening mechanism (2), and a cooling mechanism (3) arranged sequentially along the travel direction of the copper rod (100); The preheating mechanism (1) is a medium-frequency induction coil, which is used to heat the copper rod (100) passing through it to 180°C-200°C. The cooling mechanism (3) includes a spray water cooling module (30), an immersion water cooling module (31), and a blower drying module (32) arranged in sequence. The spray water cooling module (30) is used to reduce the surface temperature of the copper rod (100) to 60℃-80℃, and the immersion water cooling module (31) reduces the overall temperature of the copper rod (100) to 30℃-40℃. The spray water cooling module (30) includes a copper rod (100) passing through a spray ring inside it, and a high-pressure atomizing nozzle is installed on the inner wall of the spray ring. The immersion water cooling module (31) includes a strip-shaped water tank (310), and openings (311) are provided on the opposite side walls of the water tank (310) for the copper rod (100) to pass through. The blowing drying module (32) includes an air jet ring, on the inner wall of which are mounted a plurality of air jet nozzles arranged in a ring.

2. The copper rod straightening device as described in claim 1, characterized in that, Both ends of the water tank (310) are provided with water collection tanks (312), and the water collection tanks (312) are located at the opening (311) on the end face of the water tank (310); The bottom side of the water collection tank (312) is connected to a return water pipe (313), which is connected to the top of the spray tank. The spray tank is equipped with a pumping system for pumping the cooling water in the spray tank to the spray ring.

3. The copper rod straightening device as described in claim 2, characterized in that, A partition (314) is provided inside the water tank (310), and the partition (314) can move along the length of the water tank (310); The partition (314) has an opening (3141) for the copper rod (100) to pass through, and the periphery of the partition (314) is provided with a sealing strip that seals with the inner wall of the water tank (310). The water tank (310) has flanges (3101) on both sides along the length direction, and the top two ends of the partition (314) are provided with U-shaped locking blocks (3142). A locking bolt with its end abutting against the bottom side of the flange (3101) is threaded on one side wall of the U-shaped locking block (3142). The bottom side or inner wall of the water tank (310) is provided with a plurality of guide members along its length direction. The guide members include a pair of guide blocks (3102) spaced apart. Each of the two guide blocks (3102) has a guide slope (3103) on its opposite top surface. The bottom end of the partition (314) is inserted between the two guide blocks (3102). At least one side of the water tank (310) is provided with a drain pipe (3104), and the open end of the drain pipe (3104) is detachably provided with a plug. The drain pipe (3104) is connected to the top of the spray tank through a return water pipe.

4. A copper rod straightening device as described in claim 2 or 3, characterized in that, A scraper ring (33) is provided in the water collection tank (312) located at the end of the water tank (310) or at the discharge end of the water tank (310), and the inner wall of the scraper ring (33) is provided with annular scraper fins.

5. The copper rod straightening device as described in claim 1, characterized in that, A waxing mechanism (4) is also provided in the preheating mechanism (1) and the straightening mechanism (2).

6. The copper rod straightening device as described in claim 5, characterized in that, A dewaxing mechanism (5) is also provided between the straightening mechanism (2) and the cooling mechanism (3); The dewaxing mechanism (5) includes a box (50), the top of which is covered with an insulated cover plate (55). The two ends of the box (50) are provided with openings (51) for copper rods (100) to pass through. The inner bottom side of the box (50) is fixed with a dewaxing component by a support column. The dewaxing component includes a groove (52) with an open top. A pair of partition plates (53) are provided in the groove (52). Melting areas are formed on both sides of the pair of partition plates (53), and a rinsing area is formed between the pair of partition plates (53). Openings (521) and (531) are formed concentrically on both ends of the groove (52) and on the partition plates (53). A cover plate (530) is provided on the top of the rinsing area. A drain hole (532) is opened at the bottom of the rinsing area. A rinsing nozzle (533) is installed on the inner wall of the rinsing area. A drain pipe (54) is provided on one side wall of the box (50). It also includes a liquid pump for continuously pumping water from the tank (50) into the melting zone.

7. The copper rod straightening device as described in claim 6, characterized in that, Heat recovery cover one (60) and heat recovery cover two (61) are provided on both sides of the intermediate frequency induction coil and are connected to each other. The heat recovery cover one (60) and heat recovery cover two (61) are connected by multiple connecting pipes (62) surrounding the intermediate frequency induction coil. In use, the copper rod 100 passes through heat recovery cover one (60), medium frequency induction coil and heat recovery cover two (61) in sequence. The heat recovery hood 1 (60) and heat recovery hood 2 (61) are respectively provided with an air inlet and an air outlet. The air outlet is connected to an air pump in sequence. The air pump is connected to the air jet ring through a heating pipe set at the bottom of the box 50 or inside the melting area.

8. The copper rod straightening device as described in claim 7, characterized in that, A cleaning structure is provided on one side of each metal straightening roller in the straightening mechanism (2). The cleaning structure includes a semi-circular cover (7). Blowing nozzles (71) are provided at both ends of the cover (7). The blowing nozzles (71) blow out a fan-shaped airflow. A negative pressure port (72) is provided on the cover (7) between the two blowing nozzles (71). The negative pressure port (72) is connected to a cooling interception device (73). The cooling interception device (73) is connected to the negative pressure device.

9. A copper rod straightening device as described in claim 8, characterized in that, The heat recovery cover (61) is connected to the second air pump (71) through the second exhaust port at its end. The second air pump is connected to the blowing nozzle (71), and the high-temperature airflow ejected from the blowing nozzle (71) blows onto the surface of the metal straightening roller.

10. A method for straightening a copper rod, characterized in that, include: Step 1: Start the equipment, set the target wire diameter to Φ12mm, and the preheating temperature to 190℃. Step 2: Control the copper rod (100) to enter the intermediate frequency induction coil after passing through the wire feeding mechanism, and heat up to 190℃ within 2 seconds. Step 3: The heated copper rod (100) is fed into the straightening mechanism (2), and the copper rod is straightened by multiple sets of straightening rollers arranged in an alternating manner at multiple points. Step 4: The straightened copper rod (100) is sent into the cooling mechanism (3) for segmented gradient cooling.

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