Aluminum coil uniform heating type annealing furnace and annealing method thereof

Abstract

The invention discloses an aluminum coil uniform heating type annealing furnace and an annealing method thereof.The aluminum coil uniform heating type annealing furnace comprises a mounting bottom plate, an annealing furnace body and a slow cooling box, and the interior of the annealing furnace body is divided into a preheating area, a heating area and a heat preservation area through a first partition plate and a second partition plate. Accurate temperature control is achieved through the synergistic effect of an electromagnetic heater and a gas uniformizing nozzle, energy consumption is remarkably reduced through cooperation of a waste heat recovery system and a nitrogen cooling device, the front treatment box is provided with an adjustable straightening roller and a normal-pressure pulse type plasma cleaning machine, and it is ensured that the surface of the aluminum material is clean. Through the four-stage process of preheating, heating, heat preservation and slow cooling and in cooperation with closed-loop control of a temperature sensor, the aluminum coil annealing temperature difference is smaller than or equal to + / -3 DEG C, the grain size uniformity is improved by 50% or above, the surface roughness Ra is smaller than or equal to 0.2 micrometer, the production efficiency is improved by 40%, the rejection rate is reduced to 2% or below, and the technical problems of uneven temperature, high energy consumption, surface damage and the like of a traditional process are solved; the method is especially suitable for production and processing of high-end aluminum materials.

Description

Technical Field

[0001] This invention relates to the field of aluminum coil annealing technology, and more specifically, to an aluminum coil uniform heating annealing furnace and its annealing method. Background Technology

[0002] Aluminum coil annealing is a heat treatment process that controls heating, holding, and cooling to adjust the microstructure of aluminum, eliminate work hardening, and improve its mechanical properties, formability, and stability. This process is usually carried out in a protective atmosphere to prevent oxidation and surface defects. Annealed and softened aluminum coils are easier to process for secondary processing such as deep drawing and stretching, and reduce die wear. Therefore, an annealing furnace is required to complete the annealing process of aluminum coils.

[0003] Traditional annealing furnaces for aluminum coils often fail to ensure uniform heating during the annealing process, especially for aluminum coils that are annealed directly without being uncoiled. When aluminum coils are tightly wound, the air gaps between the layers cause uneven heat conduction and large temperature differences between the inside and outside, resulting in generally poor annealing quality. Furthermore, the residual heat of the hot air used for annealing is directly lost to the outside, causing significant waste of heat energy and increasing the operating cost of the aluminum coil annealing furnace to some extent, thus presenting certain shortcomings.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a uniformly heated annealing furnace for aluminum coils and its annealing method, thereby solving the problems mentioned in the background art.

[0006] (II) Technical Solution The specific technical solution adopted in this invention is as follows: A uniformly heated annealing furnace for aluminum coils includes a mounting base plate, an annealing furnace body, and a slow cooling box. The annealing furnace body is bolted to the top surface of the mounting base plate. A first partition and a second partition are welded into the inner cavity of the annealing furnace body, dividing the inner cavity into a preheating zone, a heating zone, and a heat preservation zone. Aluminum plate slots are correspondingly formed on the side walls of the annealing furnace body and on the first and second partitions. A slow cooling box is bolted to one side wall of the annealing furnace body. The top surface of the preheating zone... A first fixing frame is bolted to the heating zone, and a first gas distribution frame is welded to the first fixing frame. Several first heating nozzles are symmetrically installed on the top and bottom surfaces of the inner cavity of the first gas distribution frame. The inner cavity of the first gas distribution frame is connected to one end of a first gas supply branch pipe. A second fixing frame is bolted to the top surface of the inner cavity of the heating zone, and a second gas distribution frame is welded to the second fixing frame. Several second heating nozzles are symmetrically installed on the top and bottom surfaces of the inner cavity of the second gas distribution frame. The inner cavity of the second gas distribution frame is connected to... One end of the second gas supply branch pipe is connected to a first electromagnetic heater. A third fixing frame is bolted to the top surface of the inner cavity of the insulation zone, and a third gas distribution frame is welded to the third fixing frame. Several second heating nozzles are symmetrically installed on the top and bottom surfaces of the inner cavity of the third gas distribution frame. The inner cavity of the third gas distribution frame is connected to one end of the third gas supply branch pipe, and a second electromagnetic heater is installed on the third gas supply branch pipe. A circulating gas pipe is welded to the top surface of the slow cooling box and is located in the inner cavity of the slow cooling box. One end is connected to an air intake hood, and a high-speed centrifugal fan is installed on the circulating air pipe. The circulating air pipe is connected to the first, second, and third air supply branches through a three-way pipe. A fourth fixing frame is bolted to the top surface of the inner cavity of the slow cooling box, and a fourth gas equalization frame is welded to the fourth fixing frame. Several cooling nozzles are symmetrically installed on the top and bottom surfaces of the inner cavity of the fourth gas equalization frame. A nitrogen inlet pipe is connected to the inner cavity of the fourth gas equalization frame, and a flow control valve is installed on the nitrogen inlet pipe.

[0007] Furthermore, a pretreatment box is welded to the side wall of the annealing furnace body. A first electric push rod is symmetrically bolted to the top and bottom surfaces of the pretreatment box, and a first mounting plate is bolted to the movable end of the first electric push rod. Several first mounting shafts are bolted to one side of each of the two first mounting plates, and straightening rollers are mounted on the first mounting shafts. A normal pressure pulse plasma cleaner is symmetrically mounted on the two first mounting plates.

[0008] Furthermore, a second electric push rod is bolted to one side of the top surface of the slow cooling box, and a second mounting plate is bolted to the movable end of the second electric push rod. An oil storage tank is bolted to the top surface of the second mounting plate, and a replenishment pipe is connected to the top surface of the oil storage tank. A second mounting shaft is symmetrically welded to the bottom surface of the second mounting plate, and an oiling roller is mounted on the second mounting shaft. A sponge sleeve is fitted onto the oiling roller. Several oil outlet pipes are symmetrically and evenly connected to both sides of the bottom surface of the oil storage tank, and an oil outlet valve is installed on the oil outlet pipe.

[0009] Furthermore, an aluminum coil uncoiling machine is bolted to one side of the top surface of the mounting base plate.

[0010] Furthermore, an aluminum coil winding machine is bolted and fixed to the other side of the top surface of the mounting base plate.

[0011] Furthermore, guide slide rods are symmetrically welded to both of the first mounting plates, and guide sleeves are welded to the top and bottom surfaces of the pretreatment box, with guide slide rods fitted inside the guide sleeves.

[0012] Furthermore, a first temperature sensor is installed in the heating zone, a second temperature sensor is installed in the heat preservation zone, and a temperature controller is installed on the annealing furnace body, and the temperature controller is electrically connected to the first temperature sensor, the second temperature sensor, the first electromagnetic heater, and the second electromagnetic heater.

[0013] Furthermore, a control panel is installed on the side wall of the annealing furnace body, and the control panel is electrically connected to the aluminum coil uncoiling machine, the aluminum coil rewinding machine, the atmospheric pressure pulse plasma cleaner, the first electric push rod, the second electric push rod, the high-speed centrifugal fan, the flow control valve, and the oil outlet valve.

[0014] Furthermore, the preheating zone, heating zone, heat preservation zone, and slow cooling box cavity are all welded with fixed plates, and several buffer damping springs are evenly bolted to the top surface of the fixed plates. The movable ends of the buffer damping springs are bolted to the mounting frames, and several rotating shafts are evenly mounted on the mounting frames. Ceramic rollers are fixedly mounted on the rotating shafts.

[0015] Furthermore, the cross-sectional shape of the first, second, third, and fourth gas equalization boxes is a U-shape.

[0016] The specific annealing process for aluminum coils is as follows: S1. Uncoiling: Workers first use an aluminum coil uncoiling machine to uncoil the aluminum coil to be annealed, and then one end of the uncoiled aluminum sheet is inserted into the pre-treatment box. S2. Straightening and Cleaning: After uncoiling, one end of the aluminum sheet extends into the pre-treatment box. According to the thickness of the aluminum sheet, the worker starts the first electric push rod through the control panel. By adjusting the distance between the two sets of straightening rollers, it is suitable for straightening aluminum sheets of different thicknesses, eliminating the initial warping of the coil. Before the aluminum sheet enters the inner cavity of the annealing furnace, the atmospheric pressure pulse plasma cleaner is started to clean both sides of the aluminum sheet to remove the grease and oxide layer contaminants on its surface, so as to improve the quality of subsequent annealing processing. S3. Traction and winding: After the coil has been straightened and cleaned, it can move forward along the surface of the ceramic roller. When one end of the coil extends out of the slow cooling box, it can be wound and pulled by the aluminum coil winding machine. S4. Preheating: When the aluminum material enters the preheating zone, the high-speed centrifugal fan works to pump the high-temperature waste heat air at the tail of the annealing furnace body into the first gas supply branch pipe, the second gas supply branch pipe and the third gas supply branch pipe through the suction hood and the circulating air pipe. The waste heat air in the first gas supply branch pipe can be sprayed out through the first heating nozzle, thereby preheating both sides of the aluminum material, removing any residual moisture on the surface of the aluminum material and initially increasing its temperature. S5. Annealing heating: When the aluminum material enters the heating zone, the first electromagnetic heater reheats the residual hot air entering the second gas supply branch pipe. The hot air that reaches the annealing recrystallization temperature is used to uniformly anneal the aluminum material through the second heating nozzle. S6. Heat preservation and uniform heating: When the aluminum material enters the heat preservation zone, the second electromagnetic heater heats the residual heat air in the third gas supply branch pipe to make it reach the uniform heating temperature of the aluminum material. The aluminum material can be heat-preserved by the third heating nozzle, so that the aluminum grains can grow fully and improve the annealing quality of the aluminum coil. S7. Cooling: After the aluminum material enters the slow cooling chamber, the residual hot air is drawn into the suction hood, which can accelerate the air flow speed on the surface of the aluminum material and initially achieve air cooling treatment. Then, the flow control valve is opened through the control panel, and the lower temperature nitrogen is introduced into the cavity of the fourth uniform air frame box through the nitrogen inlet pipe, and finally sprayed out through the cooling nozzle to complete the final cooling of the aluminum coil. S8. Oiling Protection: Before the aluminum coil is wound up, the control panel can open the oil outlet valve, allowing the rolling oil to fall onto the sponge sleeve. The sponge sleeve and oiling roller can then be used to apply oil to the surface of the aluminum coil online. This can be used for rust prevention, lubrication, friction reduction, and improvement of subsequent processing performance of the aluminum coil.

[0017] (III) Beneficial Effects Compared with the prior art, the present invention provides a uniformly heated annealing furnace for aluminum coils and an annealing method thereof, which has the following beneficial effects: This invention provides a uniformly heated annealing furnace for aluminum coils and its annealing method, which has the following significant advantages: Through segmented temperature control design of the preheating zone, heating zone, and holding zone, combined with the synergistic effect of the electromagnetic heater and the uniform gas nozzle, high-precision temperature control of the temperature difference during aluminum annealing is achieved, improving grain size uniformity; an innovative waste heat recovery system combined with a nitrogen cooling device reduces overall energy consumption by more than 30%; a pre-positioned atmospheric pressure pulse plasma cleaner can thoroughly remove grease and oxide layers from the aluminum surface, and combined with a scratch-resistant structure of ceramic rollers and buffer damping springs, ensures smooth annealing. The surface roughness Ra of the annealed aluminum coil is ≤0.2μm; the intelligent temperature sensor and electromagnetic heater closed-loop control system keep the temperature fluctuation within ±1℃, while the adjustable straightening roller and oiling roller design can adapt to aluminum coils of different thicknesses from 0.05-5mm; the integrated design of uncoiling, straightening, cleaning, annealing to oiling and rewinding is fully automated, which increases production efficiency by 40% and reduces the scrap rate to below 2%, realizing high-quality, low-energy consumption and intelligent aluminum coil annealing processing, effectively solving the technical problems of uneven temperature, high energy consumption and surface damage in traditional processes. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a uniformly heated annealing furnace for aluminum coils according to an embodiment of the present invention; Figure 2 Front view according to an embodiment of the present invention; Figure 3 According to the embodiments of the present invention Figure 1 Enlarged view of point A; Figure 4 According to the embodiments of the present invention Figure 1 Enlarged view of point B; Figure 5 According to the embodiments of the present invention Figure 1 Enlarged view of point B; Figure 6 According to the embodiments of the present invention Figure 1 Enlarged view of point D; Figure 7 According to the embodiments of the present invention Figure 1 Enlarged view of point E; Figure 8 According to the embodiments of the present invention Figure 1 Enlarged view at point F; Figure 9A perspective sectional view of a first air-regulating frame box according to an embodiment of the present invention; Figure 10 A perspective view of an oil storage tank according to an embodiment of the present invention.

[0020] In the picture: 1. Aluminum coil uncoiling machine; 2. Mounting base plate; 3. Pre-treatment box; 4. Preheating zone; 5. Heating zone; 6. First temperature sensor; 7. Insulation zone; 8. Second temperature sensor; 9. Slow cooling box; 10. Fourth gas distribution frame box; 11. Aluminum coil winding machine; 12. Guide slide rod; 13. First electric push rod; 14. Guide sleeve; 15. First fixed frame; 16. First gas supply branch pipe; 17. First partition plate; 18. Second fixed frame; 19. Second partition plate; 20. Third fixed frame; 21. Circulating gas pipe; 22. High-speed centrifugal fan; 23. Suction hood; 24. Fourth fixed frame; 25. Nitrogen inlet pipe; 26. Second electric push rod; 27. Annealing furnace body; 28. Control panel; 29. ​​Temperature controller; 30. Second gas supply branch pipe; 31. 31. Third gas supply branch pipe; 32. First mounting plate; 33. First mounting shaft; 34. Straightening roller; 35. Atmospheric pressure pulse plasma cleaner; 36. First gas distribution box; 37. First heating nozzle; 38. Aluminum plate through-slot; 39. Fixing plate; 40. Buffer damping spring; 41. Mounting frame; 42. Rotating shaft; 43. Ceramic idler roller; 44. First electromagnetic heater; 45. Second gas distribution box; 46. Second heating nozzle; 47. Third gas distribution box; 48. Third heating nozzle; 49. Second electromagnetic heater; 50. Flow control valve; 51. Cooling nozzle; 52. Second mounting plate; 53. Second mounting shaft; 54. Oiling roller; 55. Sponge sleeve; 56. Oil storage tank; 57. Replenishment pipe; 58. Oil outlet pipe; 59. Oil outlet valve. Detailed Implementation

[0021] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] According to an embodiment of the present invention, a uniformly heated annealing furnace for aluminum coils and an annealing method thereof are provided.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-10As shown, an aluminum coil uniform heating annealing furnace according to an embodiment of the present invention includes a mounting base plate 2, an annealing furnace body 27, and a slow cooling box 9. The annealing furnace body 27 is bolted to the top surface of the mounting base plate 2, and a first partition plate 17 and a second partition plate 19 are welded to the inner cavity of the annealing furnace body 27. The first partition plate 17 and the second partition plate 19 divide the inner cavity of the annealing furnace body 27 into a preheating zone 4, a heating zone 5, and a heat preservation zone 7. Aluminum plate through slots 38 are correspondingly opened on the side walls of both sides of the annealing furnace body 27 and on the first partition plate 17 and the second partition plate 19. The slow cooling box 9 is bolted to one side wall of the annealing furnace body 27. A first fixing frame 15 is bolted to the top surface of the preheating zone 4, and a first gas distribution frame 36 is welded to the first fixing frame 15. Several first heating nozzles 37 are symmetrically installed on the top and bottom surfaces of the first gas distribution frame 36. One end of a first gas supply branch pipe 16 is connected to the cavity of the first gas distribution frame 36. A second fixing frame 18 is bolted to the top surface of the heating zone 5, and a second gas distribution frame 45 is welded to the second fixing frame 18. Several second heating nozzles 46 are symmetrically installed on the top and bottom surfaces of the cavity of the second gas distribution frame 45. The cavity of the second gas distribution frame 45 is connected to... A second gas supply branch pipe 30 is connected to one end of the insulation zone 7, and a first electromagnetic heater 44 is installed on the second gas supply branch pipe 30. A third fixing frame 20 is bolted to the top surface of the inner cavity of the insulation zone 7, and a third gas equalization frame box 47 is welded to the third fixing frame 20. Several second heating nozzles 46 are symmetrically installed on the top and bottom surfaces of the inner cavity of the third gas equalization frame box 47. The inner cavity of the third gas equalization frame box 47 is connected to one end of a third gas supply branch pipe 31, and a second electromagnetic heater 49 is installed on the third gas supply branch pipe 31. A circulating gas pipe 21 is welded to the top surface of the slow cooling box 9, and the circulating gas pipe 21 is located inside the slow cooling box 9. A suction hood 23 is installed at one end of the cavity, and a high-speed centrifugal fan 22 is installed on the circulating air pipe 21. The circulating air pipe 21 is connected to the first gas supply branch pipe 16, the second gas supply branch pipe 30 and the third gas supply branch pipe 31 through a three-way pipe. A fourth fixing frame 24 is bolted to the top surface of the inner cavity of the slow cooling box 9, and a fourth gas equalization frame box 10 is welded on the fourth fixing frame 24. Several cooling nozzles 51 are symmetrically installed on the top and bottom surfaces of the inner cavity of the fourth gas equalization frame box 10. A nitrogen inlet pipe 25 is connected to the inner cavity of the fourth gas equalization frame box 10, and a flow control valve 50 is installed on the nitrogen inlet pipe 25.

[0024] Furthermore, a pretreatment box 3 is welded to the side wall of the annealing furnace body 27. The top and bottom surfaces of the pretreatment box 3 are symmetrically bolted with a first electric push rod 13, and the movable end of the first electric push rod 13 is bolted with a first mounting plate 32. Several first mounting shafts 33 are bolted to one side of each of the two first mounting plates 32, and straightening rollers 34 are mounted on the first mounting shafts 33. Atmospheric pressure pulse plasma cleaners 35 are symmetrically mounted on the two first mounting plates 32.

[0025] Furthermore, a second electric push rod 26 is bolted to one side of the top surface of the slow cooling box 9, and a second mounting plate 52 is bolted to the movable end of the second electric push rod 26. An oil storage tank 56 is bolted to the top surface of the second mounting plate 52, and a replenishment pipe 57 is connected to the top surface of the oil storage tank 56. A second mounting bracket 53 is symmetrically welded to the bottom surface of the second mounting plate 52, and an oiling roller 54 is mounted on the second mounting bracket 53. A sponge sleeve 55 is fitted onto the oiling roller 54. Several oil outlet pipes 58 are symmetrically and evenly connected to both sides of the bottom surface of the oil storage tank 56, and an oil outlet valve 59 is installed on each oil outlet pipe 58. Furthermore, an aluminum coil uncoiling machine 1 is bolted to one side of the top surface of the mounting base plate 2.

[0026] Furthermore, an aluminum coil rewinder 11 is bolted and fixed to the other side of the top surface of the mounting base plate 2.

[0027] Furthermore, guide slide rods 12 are symmetrically welded on both first mounting plates 32, and guide sleeves 14 are welded on the top and bottom surfaces of the pre-treatment box 3, with guide slide rods 12 sleeved inside the guide sleeves 14.

[0028] Furthermore, a first temperature sensor 6 is installed in the heating zone 5, a second temperature sensor 8 is installed in the heat preservation zone 7, and a temperature controller 29 is installed on the annealing furnace body 27. The temperature controller 29 is electrically connected to the first temperature sensor 6, the second temperature sensor 8, the first electromagnetic heater 44, and the second electromagnetic heater 49.

[0029] Furthermore, a control panel 28 is installed on the side wall of the annealing furnace body 27, and the control panel 28 is electrically connected to the aluminum coil uncoiler 1, the aluminum coil rewinder 11, the atmospheric pressure pulse plasma cleaner 35, the first electric push rod 13, the second electric push rod 26, the high-speed centrifugal fan 22, the flow control valve 50, and the oil outlet valve 59.

[0030] Furthermore, the preheating zone 4, heating zone 5, heat preservation zone 7 and slow cooling box 9 are all welded with fixing plates 39, and several buffer damping springs 40 are evenly bolted to the top surface of the fixing plates 39. The movable end of the buffer damping springs 40 is bolted to the mounting frame 41, and several rotating shafts 42 are evenly mounted on the mounting frame 41. Ceramic rollers 43 are fixedly mounted on the rotating shafts 42.

[0031] Furthermore, the cross-sectional shape of the first gas equalization box 36, the second gas equalization box 45, the third gas equalization box 47, and the fourth gas equalization box 10 is all U-shaped.

[0032] The specific annealing process for aluminum coils is as follows: S1. Uncoiling: The worker first uncoils the aluminum coil to be annealed using the aluminum coil uncoiling machine 1, and then one end of the uncoiled aluminum sheet is inserted into the pre-treatment box 3. S2. Straightening and Cleaning: After uncoiling, one end of the aluminum sheet extends into the pre-treatment box 3. According to the thickness of the aluminum sheet, the worker starts the first electric push rod 13 through the control panel 28. By adjusting the distance between the two sets of straightening rollers 34, it is suitable for straightening aluminum sheets of different thicknesses, eliminating the initial warping of the coil. Before the aluminum sheet enters the inner cavity of the annealing furnace body 27, the atmospheric pressure pulse plasma cleaner 35 is started to clean both sides of the aluminum sheet to remove the grease and oxide layer contaminants on its surface, so as to improve the quality of subsequent annealing processing. S3. Traction and winding: After the coil has been straightened and cleaned, it can move forward along the surface of the ceramic roller 43. When one end of the coil extends out of the slow cooling box 9, it can be wound and pulled by the aluminum coil winding machine 11. S4. Preheating: When the aluminum material enters the preheating zone 4, the high-speed centrifugal fan 22 operates, pumping the high-temperature waste heat air at the tail of the annealing furnace body 27 into the first gas supply branch pipe 16, the second gas supply branch pipe 30 and the third gas supply branch pipe 31 through the suction hood 23 and the circulating air pipe 21. The waste heat air in the first gas supply branch pipe 16 can be sprayed out through the first heating nozzle 37, thereby preheating both sides of the aluminum material, removing any residual moisture on the surface of the aluminum material and initially increasing its temperature. S5. Annealing heating: When the aluminum material enters the heating zone 5, the first electromagnetic heater 44 reheats the residual hot air entering the second gas supply branch pipe 30. The hot air that reaches the annealing recrystallization temperature passes through the second heating nozzle 46 to perform uniform annealing heat treatment on the aluminum material. S6. Heat preservation and uniform heating: When the aluminum material enters the heat preservation zone 7, the second electromagnetic heater 49 heats the residual heat air in the third gas supply branch pipe 31 to make it reach the uniform heating temperature of the aluminum material. The aluminum material can be heat-preserved by the third heating nozzle 48, so that the aluminum material grains can grow fully and improve the annealing quality of the aluminum coil. S7. Cooling: After the aluminum material enters the inner cavity of the slow cooling box 9, the residual hot air is drawn into the suction hood 23, which can accelerate the air flow speed on the surface of the aluminum material and initially achieve air cooling treatment. Then, the flow control valve 50 is opened through the control panel 28, and the lower temperature nitrogen is introduced into the cavity of the fourth uniform air box 10 through the nitrogen inlet pipe 25, and finally sprayed out through the cooling nozzle 51 to complete the final cooling of the aluminum coil. S8. Oiling Protection: Before entering the aluminum coiling stage, the control panel 28 can open the oil outlet valve 59, allowing the rolling oil to fall onto the sponge sleeve 55. The sponge sleeve 55 and the oiling roller 54 are then used to apply oil to the surface of the aluminum coil online, which can be used for rust prevention, lubrication, friction reduction and improvement of subsequent processing performance of the aluminum coil.

[0033] Working Principle: This invention employs a mounting base plate 2, an annealing furnace body 27, and a pretreatment box 3. The annealing furnace body 27 is bolted to the top surface of the mounting base plate 2. A first partition 17 and a second partition 19 are welded to the inner cavity of the annealing furnace body 27, dividing the inner cavity into a preheating zone 4, a heating zone 5, and a heat preservation zone 7. Aluminum plate through-slots 38 are correspondingly formed on the side walls of the annealing furnace body 27 and on the first and second partitions 17 and 19. On the other hand, an aluminum coil uncoiling machine 1 is bolted to one side of the top surface of the mounting base plate 2. A pretreatment box 3 is welded to the side wall of the annealing furnace body 27. The top and bottom surfaces of the pretreatment box 3 are symmetrically bolted to the first... An electric push rod 13 is provided, and a first mounting plate 32 is bolted to the movable end of the first electric push rod 13. Several first mounting shafts 33 are bolted to one side of each of the two first mounting plates 32, and straightening rollers 34 are mounted on the first mounting shafts 33. Guide slide rods 12 are symmetrically welded to both first mounting plates 32. Guide sleeves 14 are welded to the top and bottom surfaces of the pretreatment box 3, and guide slide rods 12 are fitted inside the guide sleeves 14. In use, the worker first uncoils the aluminum coil to be annealed using the aluminum coil uncoiling machine 1. Then, one end of the uncoiled aluminum sheet extends into the pretreatment box 3. The worker starts the first electric push rod 13 according to the thickness of the aluminum sheet through the control panel 28, and adjusts the distance between the two sets of straightening rollers 34 to make the aluminum sheet thicker and thicker. It is suitable for straightening aluminum sheets of different thicknesses, eliminating initial warping of coils. Two first mounting plates 32 are symmetrically equipped with atmospheric pressure pulse plasma cleaners 35. Before the aluminum sheet enters the inner cavity of the annealing furnace body 27, the atmospheric pressure pulse plasma cleaners 35 are activated to clean both sides of the aluminum sheet, removing grease and oxide layer contaminants from its surface, thus improving the quality of subsequent annealing. In addition, this invention employs a slow cooling box 9, a buffer damping spring 40, and ceramic rollers 43. The slow cooling box 9 is bolted to the other side wall of the annealing furnace body 27, and an aluminum coil winding machine 11 is bolted to the other side of the top surface of the mounting base plate 2. The preheating zone 4, heating zone 5, heat preservation zone 7, and the inner cavity of the slow cooling box 9 are all welded with fixed... Plate 39 is fixedly mounted with several buffer damping springs 40 evenly bolted to its top surface. The movable ends of the buffer damping springs 40 are bolted to mounting frames 41. Several rotating shafts 42 are evenly mounted on the mounting frames 41, and ceramic rollers 43 are fixedly mounted on the rotating shafts 42. As described above, after the roll material has been straightened and cleaned, it can move forward along the surface of the ceramic rollers 43. When one end of the roll material extends out of the slow cooling box 9, it can be wound up using the aluminum roll winding machine 11. The ceramic rollers 43 have the advantages of wear resistance and preventing aluminum sticking. Combined with the buffer damping springs 40, they can reduce surface scratches when the roll material passes through, ensuring product quality and enhancing practicality. A second electric push rod 26 is bolted to one side of the top surface of the slow cooling box 9.Furthermore, a second mounting plate 52 is bolted to the movable end of the second electric push rod 26, and an oil storage tank 56 is bolted to the top surface of the second mounting plate 52. A replenishment pipe 57 is connected to the top surface of the oil storage tank 56, allowing rolling oil to be added into the inner cavity of the oil storage tank 56 through the replenishment pipe 57. A second mounting shaft bracket 53 is symmetrically welded to the bottom surface of the second mounting plate 52, and an oiling roller 54 is mounted on the second mounting shaft bracket 53. A sponge sleeve 55 is fitted onto the oiling roller 54. Several oil outlet pipes 58 are symmetrically and evenly connected to both sides of the bottom surface of the oil storage tank 56, and an oil outlet valve 59 is installed on the oil outlet pipe 58. Before entering the aluminum coiling stage, the control panel 28 can open the oil outlet valve 59, allowing the rolling oil to fall onto the sponge sleeve 55, thus reusing the oil. The cotton sleeve 55 and the oiling roller 54 enable online oiling of the aluminum coil surface, which can be used for rust prevention, lubrication, friction reduction, and improvement of subsequent processing performance. This invention employs a preheating zone 4, a heating zone 5, a heat preservation zone 7, and a slow cooling box 9. A first fixing frame 15 is bolted to the top surface of the preheating zone 4, and a first gas distribution frame 36 is welded to the first fixing frame 15. Several first heating nozzles 37 are symmetrically installed on the top and bottom surfaces of the first gas distribution frame 36. One end of a first gas supply branch pipe 16 is connected to the cavity of the first gas distribution frame 36. A second fixing frame 18 is bolted to the top surface of the heating zone 5, and a second gas distribution frame 45 is welded to the second fixing frame 18. Several second heating nozzles 46 are symmetrically installed on the top and bottom surfaces of the inner cavity of the second gas distribution box 45. The inner cavity of the second gas distribution box 45 is connected to one end of a second gas supply branch pipe 30, and a first electromagnetic heater 44 is installed on the second gas supply branch pipe 30. A third fixing frame 20 is bolted to the top surface of the inner cavity of the insulation zone 7, and a third gas distribution box 47 is welded to the third fixing frame 20. Several second heating nozzles 46 are symmetrically installed on the top and bottom surfaces of the inner cavity of the third gas distribution box 47. The inner cavity of the third gas distribution box 47 is connected to one end of a third gas supply branch pipe 31, and a second electromagnetic heater 49 is installed on the third gas supply branch pipe 31. A circulating air pipe 21 is welded to the top surface of the slow cooling box 9, and the circulating air pipe 21 is located... A suction hood 23 is installed at one end of the inner cavity of the slow cooling box 9, and a high-speed centrifugal fan 22 is installed on the circulating air pipe 21. The circulating air pipe 21 is connected to the first air supply branch pipe 16, the second air supply branch pipe 30, and the third air supply branch pipe 31 through a three-way pipe. On the other hand, a fourth fixing bracket 24 is bolted to the top surface of the inner cavity of the slow cooling box 9, and a fourth gas equalization frame box 10 is welded to the fourth fixing bracket 24. Several cooling nozzles 51 are symmetrically installed on the top and bottom surfaces of the inner cavity of the fourth gas equalization frame box 10. The inner cavity of the fourth gas equalization frame box 10 is connected to a nitrogen inlet pipe 25, and a flow control valve 50 is installed on the nitrogen inlet pipe 25. In use, when the aluminum material enters the preheating zone 4, the high-speed centrifugal fan 22 operates.High-temperature waste air from the tail end of the annealing furnace body 27 is pumped into the first gas supply branch pipe 16, the second gas supply branch pipe 30, and the third gas supply branch pipe 31 through the suction hood 23 and the circulating air pipe 21. The waste air in the first gas supply branch pipe 16 can be sprayed out through the first heating nozzle 37, thereby preheating both sides of the aluminum material, removing any residual moisture on the surface of the aluminum material and initially raising its temperature. Then, it enters the heating zone 5. When the aluminum material enters the heating zone 5, the first electromagnetic heater 44 reheats the waste air entering the second gas supply branch pipe 30. The hot air reaching the annealing recrystallization temperature is passed through the second heating nozzle 46 to uniformly anneal the aluminum material. Finally, the aluminum material enters the heat preservation zone 7. The second electromagnetic heater 49 heats the waste air in the third gas supply branch pipe 31 to reach the uniform heat temperature of the aluminum material. The third heating nozzle 48 is used to heat preservation the aluminum material, allowing the aluminum grains to grow fully and improving the quality of the aluminum coil. To ensure the quality of annealing, a first temperature sensor 6 is installed in the heating zone 5, and a second temperature sensor 8 is installed in the heat preservation zone 7. A temperature controller 29 is installed on the annealing furnace body 27. The operating status of the first electromagnetic heater 44 and the second electromagnetic heater 49 can be adjusted based on the temperature information fed back by the first temperature sensor 6 and the second temperature sensor 8, ensuring minimal temperature fluctuations in the heating zone 5 and the heat preservation zone 7, and guaranteeing uniform heating of the aluminum material during annealing. After the aluminum material enters the slow cooling chamber 9, the residual hot air is drawn into the suction hood 23, accelerating the airflow speed on the aluminum surface and initially achieving air cooling. Then, the flow control valve 50 is opened via the control panel 28, and lower-temperature nitrogen gas is introduced into the cavity of the fourth uniform gas box 10 through the nitrogen inlet pipe 25, and finally sprayed out through the cooling nozzle 51 to complete the final cooling of the aluminum coil, facilitating subsequent oiling and winding operations.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A uniformly heated annealing furnace for aluminum coils, characterized in that, The system includes a mounting base plate (2), an annealing furnace body (27), and a slow cooling box (9). The mounting base plate (2) is bolted to the top surface of the annealing furnace body (27). The annealing furnace body (27) is welded with a first partition plate (17) and a second partition plate (19) inside the annealing furnace body (27). The first partition plate (17) and the second partition plate (19) divide the annealing furnace body (27) into a preheating zone (4), a heating zone (5), and a heat preservation zone (7). Aluminum plate through slots (38) are correspondingly opened on the side walls of the annealing furnace body (27) and on the first partition plate (17) and the second partition plate (19). The slow cooling box (9) is bolted to one side wall of the annealing furnace body (27). The top of the preheating zone (4) is... A first fixing frame (15) is fixedly installed on the surface with bolts, and a first gas equalization frame box (36) is welded on the first fixing frame (15). Several first heating nozzles (37) are symmetrically installed on the top and bottom surfaces of the inner cavity of the first gas equalization frame box (36). One end of a first gas supply branch pipe (16) is connected to the inner cavity of the first gas equalization frame box (36). A second fixing frame (18) is fixedly installed on the top surface of the inner cavity of the heating zone (5) with bolts, and a second gas equalization frame box (45) is welded on the second fixing frame (18). Several second heating nozzles (46) are symmetrically installed on the top and bottom surfaces of the inner cavity of the second gas equalization frame box (45). A second gas supply branch pipe is connected to the inner cavity of the second gas equalization frame box (45). One end of the second gas supply branch pipe (30) is connected to a third gas supply branch pipe (31), and a third gas equalization frame box (47) is welded onto the top surface of the inner cavity of the insulation zone (7). Several second heating nozzles (46) are symmetrically installed on the top and bottom surfaces of the inner cavity of the third gas equalization frame box (47). One end of the third gas supply branch pipe (31) is connected to the inner cavity of the third gas equalization frame box (47), and a second electromagnetic heater (49) is installed on the third gas supply branch pipe (31). A circulating gas pipe (21) is welded to the top surface of the slow cooling box (9), and the circulating gas pipe (21) is located at one end of the inner cavity of the slow cooling box (9) and connected to the third gas supply branch pipe (31). The air intake hood (23) is installed, and a high-speed centrifugal fan (22) is installed on the circulating air pipe (21). The circulating air pipe (21) is connected to the first gas supply branch pipe (16), the second gas supply branch pipe (30) and the third gas supply branch pipe (31) through a three-way pipe. The top surface of the inner cavity of the slow cooling box (9) is bolted to install a fourth fixing frame (24), and a fourth gas equalization frame box (10) is welded on the fourth fixing frame (24). Several cooling nozzles (51) are symmetrically installed on the top and bottom surfaces of the inner cavity of the fourth gas equalization frame box (10). The inner cavity of the fourth gas equalization frame box (10) is connected to a nitrogen inlet pipe (25), and a flow control valve (50) is installed on the nitrogen inlet pipe (25).

2. The aluminum coil uniform heating annealing furnace according to claim 1, characterized in that, The annealing furnace body (27) has a pretreatment box (3) welded to its side wall. The top and bottom surfaces of the pretreatment box (3) are symmetrically bolted with a first electric push rod (13), and the movable end of the first electric push rod (13) is bolted with a first mounting plate (32). Several first mounting shafts (33) are bolted to one side of each of the two first mounting plates (32), and straightening rollers (34) are mounted on the first mounting shafts (33). Atmospheric pressure pulse plasma cleaners (35) are symmetrically mounted on the two first mounting plates (32).

3. The aluminum coil uniform heating annealing furnace according to claim 1, characterized in that, The slow cooling box (9) is bolted to one side of the top surface and a second electric push rod (26) is bolted to the movable end of the second electric push rod (26) and a second mounting plate (52) is bolted to the top surface of the second mounting plate (52) and an oil storage tank (56) is bolted to the top surface of the oil storage tank (56) and a replenishment pipe (57) is connected to the top surface of the oil storage tank (56). The bottom surface of the second mounting plate (52) is symmetrically welded with a second mounting bracket (53) and an oiling roller (54) is mounted on the second mounting bracket (53). A sponge sleeve (55) is sleeved on the oiling roller (54). Several oil outlet pipes (58) are symmetrically and evenly connected to both sides of the bottom surface of the oil storage tank (56) and an oil outlet valve (59) is mounted on the oil outlet pipe (58).

4. The aluminum coil uniform heating annealing furnace according to claim 1, characterized in that, An aluminum coil uncoiling machine (1) is bolted to one side of the top surface of the mounting base plate (2).

5. The aluminum coil uniform heating annealing furnace according to claim 1, characterized in that, An aluminum coil rewinder (11) is bolted to the other side of the top surface of the mounting base plate (2).

6. The aluminum coil uniform heating annealing furnace according to claim 1, characterized in that, Guide slide rods (12) are symmetrically welded on both of the first mounting plates (32). Guide slide sleeves (14) are welded on the top and bottom surfaces of the pre-processing box (3), and guide slide rods (12) are sleeved inside the guide slide sleeves (14).

7. The aluminum coil uniform heating annealing furnace according to claim 1, characterized in that, A first temperature sensor (6) is installed in the heating zone (5), a second temperature sensor (8) is installed in the heat preservation zone (7), and a temperature controller (29) is installed on the annealing furnace body (27). The temperature controller (29) is electrically connected to the first temperature sensor (6), the second temperature sensor (8), the first electromagnetic heater (44), and the second electromagnetic heater (49).

8. The aluminum coil uniform heating annealing furnace according to claim 1, characterized in that, The annealing furnace body (27) is equipped with a control panel (28) on its side wall, and the control panel (28) is electrically connected to the aluminum coil uncoiler (1), the aluminum coil rewinder (11), the atmospheric pressure pulse plasma cleaner (35), the first electric push rod (13), the second electric push rod (26), the high-speed centrifugal fan (22), the flow control valve (50), and the oil outlet valve (59).

9. The aluminum coil uniform heating annealing furnace according to claim 1, characterized in that, The preheating zone (4), heating zone (5), heat preservation zone (7) and slow cooling box (9) are all welded with fixing plates (39), and a number of buffer damping springs (40) are evenly bolted on the top surface of the fixing plates (39), and the movable end of the buffer damping springs (40) is bolted to a mounting frame (41). A number of rotating shafts (42) are evenly mounted on the mounting frame (41), and ceramic rollers (43) are fixedly mounted on the rotating shafts (42).

10. The aluminum coil uniform heating annealing furnace according to claim 1, characterized in that, The cross-sectional shape of the first gas equalization box (36), the second gas equalization box (45), the third gas equalization box (47), and the fourth gas equalization box (10) is a U-shape. The specific annealing process for aluminum coils is as follows: S1. Uncoiling: The worker first uncoils the aluminum coil to be annealed using an aluminum coil uncoiling machine (1), and then one end of the uncoiled aluminum sheet is inserted into the pre-treatment box (3). S2, Straightening and Cleaning: After uncoiling, one end of the aluminum sheet is inserted into the pretreatment box (3). According to the thickness of the aluminum sheet, the worker starts the first electric push rod (13) through the control panel (28). By adjusting the distance between the two sets of straightening rollers (34), it is suitable for straightening aluminum sheets of different thicknesses, eliminating the initial warping of the coil. Before the aluminum sheet enters the inner cavity of the annealing furnace body (27), the atmospheric pressure pulse plasma cleaner (35) is started to clean both sides of the aluminum sheet to remove the grease and oxide layer contaminants on its surface, so as to improve the quality of subsequent annealing processing. S3, Traction and Rewinding: After the coil is straightened and cleaned, it can move forward along the surface of the ceramic roller (43). When one end of the coil extends out of the slow cooling box (9), it can be rewound and pulled by the aluminum coil rewinder (11). S4. Preheating: When the aluminum material enters the preheating zone (4), the high-speed centrifugal fan (22) works to pump the high-temperature waste heat air at the tail of the annealing furnace body (27) into the first gas supply branch (16), the second gas supply branch (30) and the third gas supply branch (31) through the suction hood (23) and the circulating air pipe (21). The waste heat air in the first gas supply branch (16) can be sprayed out through the first heating nozzle (37) to preheat both sides of the aluminum material, remove any residual moisture on the surface of the aluminum material and initially increase its temperature. S5, Annealing heating: When the aluminum material enters the heating zone (5), the first electromagnetic heater (44) reheats the residual hot air entering the second gas supply branch (30), and the hot air that reaches the annealing recrystallization temperature is uniformly annealed by the aluminum material through the second heating nozzle (46). S6. Heat preservation and uniform heating: When aluminum material enters the heat preservation zone (7), the second electromagnetic heater (49) heats the residual heat air in the third gas supply branch pipe (31) to make it reach the uniform heating temperature of aluminum material. The aluminum material can be heat preservation treatment by using the third heating nozzle (48) so that the aluminum material grains can grow fully and improve the annealing quality of aluminum coil. S7. Cooling: After the aluminum material enters the inner cavity of the slow cooling box (9), the residual hot air is drawn into the suction hood (23), which can accelerate the air flow speed on the surface of the aluminum material and initially achieve air cooling treatment. Then, the flow control valve (50) is opened through the control panel (28), and the nitrogen gas with a lower temperature is introduced into the cavity of the fourth uniform air frame box (10) through the nitrogen gas inlet pipe (25), and finally sprayed out through the cooling nozzle (51) to complete the final cooling of the aluminum coil. S8. Oiling protection: Before entering the aluminum coiling process, the control panel (28) can open the oil outlet valve (59) so that the rolling oil can fall onto the sponge sleeve (55). Then, the sponge sleeve (55) and the oiling roller (54) can be used to apply oil to the surface of the aluminum coil online. This can be used for rust prevention, lubrication, friction reduction and improvement of subsequent processing performance of the aluminum coil.

Images