Water-cooling production process and system for aluminum alloy forgings

Abstract

The invention discloses a water-containing cooling production process and system for an aluminum alloy forge piece, and relates to the technical field of non-ferrous metal forging forming, and the method comprises the following steps that blanking, heating, blank making, pre-forging, finish forging and edge cutting are sequentially conducted on an aluminum alloy; the forged piece obtained after edge cutting is placed in a water cooling device, and water cooling is conducted on the forged piece; appearance detection is conducted on the water-cooled forgings, and qualified products are directly placed in a heat treatment frame; and sequentially carrying out heat treatment and surface treatment on the forged piece subjected to water cooling and racking. According to the method, the forge piece is immediately subjected to water cooling after being trimmed, so that the temperature of the forge piece is rapidly reduced, the forge piece is prevented from being collided and sunken, then heat treatment is performed immediately, the production efficiency is improved, the forge piece is prevented from cracking and deforming due to incomplete cooling, and the forge piece subjected to water cooling is more uniform in heat treatment; the surface of a finished product is more wear-resistant and the surface quality is better.

Description

Technical Field

[0001] The invention relates to the technical field of nonferrous metal forging and forming, and in particular to a water-cooling production process and system for aluminum alloy forgings. Background Art

[0002] With the rapid development of China's new energy vehicle industry, higher requirements have been put forward for automobile lightweighting. One of the existing means to solve the problem of automobile lightweighting is to replace steel parts with aluminum alloy parts. For example, the density of 6082 aluminum alloy is only 2.71g / cm 3 The density of steel materials used in traditional automobiles is about 7.87g / cm 3 , with the quality of only one-third of that of steel materials, the comprehensive performance of 6082 aluminum alloy automotive forgings can also meet the use requirements. The tensile strength of 6082 aluminum alloy forgings can reach 340MPa, the yield strength can reach 300MPa, the elongation can reach more than 12%, and the hardness can reach more than 90HB. Therefore, 6082 aluminum alloy is widely used in the field of automotive parts forging due to its excellent comprehensive performance. On the basis of forging technology, predecessors have developed a complete set of mature aluminum alloy production processes, such as: blanking → heating → roll forging / bending → pre-forging → final forging → trimming → heat treatment → surface treatment.

[0003] However, there are often some problems in the actual aluminum alloy production process. There is a dense aluminum oxide protective film on the surface of aluminum alloy. Usually, the aluminum oxide film has high hardness and high wear resistance, which can protect the aluminum rod from some bumps and scratches caused during production and transportation. After the aluminum alloy is heated to above the recrystallization temperature, the plasticity of the aluminum alloy is greatly enhanced, and it can be precisely formed in the pressure equipment, but it is also very easy to have bumps, pits, scratches and other defects during the forging process and the transfer between the previous and next processes. In order to solve the defects on the surface of aluminum alloy forgings, operators are often required to use a grinding machine for grinding, which is time-consuming and labor-intensive.

[0004] At the same time, in order to ensure that aluminum alloys obtain the corresponding comprehensive mechanical properties, they often need to be heat treated after the final forging and trimming is completed.

[0005] In the traditional production process, after the aluminum alloy forgings are trimmed, the heat treatment process can only be carried out after the forgings are completely cooled. The reason is: considering the structure and performance of the material, the aluminum alloy undergoes high temperature and severe deformation during the forging process, resulting in participating stress inside the material. If heat treatment is carried out directly, the residual stress may interact with the stress generated during the heat treatment process, causing material deformation or cracking, while the residual stress inside the material after complete cooling will be relatively stable; from the perspective of heat treatment effect, heat treatment in a completely cooled state can ensure more precise temperature control, which is conducive to the optimization and adjustment of heat treatment parameters.

[0006] Therefore, in actual production, it is often necessary to place the forgings after final forging and trimming for 8 to 12 hours to completely cool them down, and then the staff will check them one by one and place the forgings in the heat treatment rack for heat treatment process.

[0007] However, the traditional aluminum alloy forging process requires a lot of time to completely cool the forgings after the final forging and trimming process, resulting in low production efficiency. In addition, the forgings are prone to cracking or deformation due to failure to completely cool within a fixed time. In addition, during the process of completely cooling the forgings after trimming, due to the high temperature, defects such as surface bumps between forgings as mentioned above or errors in worker operation are very likely to occur. Summary of the invention

[0008] The purpose of the present invention is to provide a water-cooled production process and system for aluminum alloy forgings to solve the technical problems in the prior art of low cooling efficiency of the existing aluminum alloy forging production process, easy bumps and scratches on the surface of the forgings, and uneven cooling of the forgings before the heat treatment process, resulting in cracking and deformation.

[0009] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0010] In a first aspect of the present invention, a water-cooling production process for an aluminum alloy forging is provided, comprising the following steps:

[0011] The aluminum alloy is subjected to cutting, heating, blanking, pre-forging, final forging and trimming in sequence;

[0012] The trimmed forging is placed in a water cooling device to cool the forging;

[0013] Carry out appearance inspection on the forgings after water cooling, and place qualified products directly in the heat treatment rack;

[0014] After water cooling and mounting, the forgings are subjected to heat treatment and surface treatment in sequence.

[0015] Furthermore, the specific steps of water cooling the forgings include:

[0016] Put the forging into the first water tank for water cooling;

[0017] The forgings in the water tank are transported upward to the operating table in sequence through the conveyor belt;

[0018] The forgings after water cooling are visually inspected on the operating table, and qualified products are directly placed in the heat treatment rack.

[0019] Furthermore, before the forging is cooled by water in the first water tank, a pre-treatment step is also included, including:

[0020] First, spray cooling water on both ends of the forging to pre-cool the two ends of the forging;

[0021] The forging is transferred to the first water tank for cooling by clamping and supporting both ends of the forging by a fixed frame;

[0022] Use an air jet to dry the surface of the cooled forging;

[0023] The first water tank is divided into a plurality of cooling zones, and the temperature of cooling water in the plurality of cooling zones is gradually reduced, so that the forgings are cooled step by step from the cooling zone with a high temperature to the cooling zone with a low temperature.

[0024] Furthermore, a collecting box is provided on one side of the first water tank, and the cooling water in the cooling zone with a lower temperature is transported to an adjacent cooling zone with a higher temperature or to an adjacent collecting box through a first water pump.

[0025] Furthermore, the cooling water at the top of the cooling zone with a lower temperature is transported to the bottom of the adjacent cooling zone with a higher temperature or to the bottom of the adjacent collecting box through the first water pump.

[0026] Furthermore, the cooling water in the collection box is sprayed toward both ends of the forging through the second water pump and the water nozzle to pre-cool the both ends of the forging.

[0027] Furthermore, when the forging is cooled inside the cooling zone, the cooling zone is sealed to prevent the water vapor generated during the cooling process from escaping.

[0028] Furthermore, a second water tank is provided on one side of the first water tank, and a conveyor belt is provided in the second water tank. The forgings cooled in the first water tank are moved to the second water tank for cooling again, and then the cooled forgings are transported to the operating table on one side of the second water tank by the conveyor belt. During the conveying process of the conveyor belt, the forgings are blown dry by the air nozzle.

[0029] Furthermore, the operator inspects the forgings after drying on the operating table one by one, and directly loads the forgings that meet the requirements in appearance and size into the heat treatment rack.

[0030] In another aspect of the present invention, a water-cooling production system for aluminum alloy forgings is provided, comprising:

[0031] Chain plate type double zone heating furnace, used to heat aluminum alloy raw materials to forging temperature to obtain blanks;

[0032] Electric screw press, used to process aluminum alloy blanks into the required shape;

[0033] Open presses, used to remove excess material and burrs produced during the forging process;

[0034] Water cooling device, used for cooling aluminum alloy forgings by water;

[0035] Heat treatment rack, used to support and fix aluminum alloy forgings;

[0036] Heat treatment equipment, used for heating and quenching aluminum alloy forgings;

[0037] Sandblasting machine, used to remove the oxide scale and burrs on the surface of aluminum alloy produced during the forging process;

[0038] The chain plate type double-zone heating furnace, electric screw press, open press, water cooling device, heat treatment rack, heat treatment equipment, and sandblasting machine are arranged in sequence along the conveying direction of the aluminum alloy forgings.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention immediately water-cools the forgings after trimming, so that the temperature of the forgings is rapidly reduced, thereby avoiding bumps and dents on the forgings, and then immediately performing heat treatment, thereby improving production efficiency, and preventing cracking and deformation of the forgings due to incomplete cooling. The heat treatment of the forgings after water cooling is more uniform, so that the surface of the finished product is more wear-resistant and has better surface quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0042] Figure 1 is a process flow chart of the present invention;

[0043] Figure 2 It is a schematic diagram of the structure of the water-cooling production system of the aluminum alloy forging of the present invention;

[0044] Figure 3 It is a schematic diagram of the overall structure of the water cooling device for processing aluminum alloy forgings in the present invention;

[0045] Figure 4It is a schematic diagram of the structure of the water cooling device with a pre-treatment structure in the present invention;

[0046] Figure 5 For the present invention Figure 4 A top view of

[0047] Figure 6 It is a schematic diagram of the connection structure between the moving plate and the baffle in the present invention.

[0048] The numbers in the figure represent the following:

[0049] 1. Water nozzle; 2. First water tank; 3. Partition; 4. Cooling area; 5. Air nozzle; 6. Collecting box; 7. Water inlet pipe; 8. Water outlet pipe; 9. First water pump; 10. Temperature sensor; 11. Second water pump; 12. Moving plate; 13. Fixed frame; 14. Hydraulic rod; 15. Groove; 16. Baffle; 17. Air outlet; 18. Second water tank; 19. Operating table; 20. Conveyor belt; 21. Pallet; 22. Placement area; 23. Leakage port; 24. Threaded rod; 25. First motor; 26. Water pump; 27. Water inlet pipe; 28. Water outlet pipe; 29. ​​Driving motor. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] like Figure 1 As shown, the present invention provides a water-cooling production process for aluminum alloy forgings, comprising the following steps:

[0052] The aluminum alloy is subjected to cutting, heating, blanking, pre-forging, final forging and trimming in sequence;

[0053] The trimmed forging is placed in a water cooling device to cool the forging;

[0054] Carry out appearance inspection on the forgings after water cooling, and place qualified products directly in the heat treatment rack;

[0055] After water cooling and mounting, the forgings are subjected to heat treatment and surface treatment in sequence.

[0056] The traditional aluminum alloy forging process requires a lot of time to completely cool the forgings after the final forging and trimming process, resulting in low production efficiency. In addition, the forgings are prone to cracking or deformation due to failure to completely cool within a fixed time. In addition, during the process of completely cooling the forgings after trimming, due to the high temperature, defects such as worker operating errors or surface collisions between forgings as mentioned above are very likely to occur. Therefore, it is necessary to develop a water-cooling production process for aluminum alloy forgings.

[0057] The present invention immediately water-cools the forgings after trimming, so that the temperature of the forgings is rapidly reduced, thereby avoiding bumps and dents on the forgings, and then immediately performing heat treatment, thereby improving production efficiency, and preventing cracking and deformation of the forgings due to incomplete cooling. The heat treatment of the forgings after water cooling is more uniform, so that the surface of the finished product is more wear-resistant and has better surface quality.

[0058] The present invention uses water cooling to quickly reduce the temperature of the forging, thereby stabilizing the size of the forging, reducing deformation, and ensuring the dimensional accuracy of the forging;

[0059] Water cooling can make the structure of aluminum alloy forgings more compact and refine the grains, thereby improving the uniformity of the structure and mechanical properties. Especially for aluminum alloy forgings forged at high temperatures, their strength and hardness can be significantly improved after water cooling.

[0060] Adding water cooling step can eliminate the residual stress of forgings. During the forging process, residual stress is easy to be generated inside the aluminum alloy forgings, which will seriously affect the comprehensive performance of the forgings. Water cooling can quickly reduce the temperature of the forgings, thereby eliminating the residual stress and improving the overall performance and service life of the forgings.

[0061] Adding a water cooling step reduces deformation after trimming. During the trimming process, the edge of the forging may be affected by heat and deformed. Immediate water cooling after trimming can quickly reduce the temperature of the forging, reduce deformation caused by thermal stress, and ensure dimensional accuracy and shape stability after trimming.

[0062] Adding water cooling steps improves the quality of trimming. Rapid water cooling helps reduce the heat-affected zone during trimming, reduces the roughness of the trimming surface, and improves the quality of trimming. At the same time, water cooling can also reduce defects such as cracks and burrs that may appear after trimming, and improve the overall quality of forgings.

[0063] The specific steps for water cooling forgings include:

[0064] Put the forging into the first water tank for water cooling;

[0065] The forgings in the water tank are transported upward to the operating table in sequence through the conveyor belt;

[0066] The forgings after water cooling are visually inspected on the operating table, and qualified products are directly placed in the heat treatment rack.

[0067] Although the cooling efficiency of the forgings is improved by directly using a water tank compared with the prior art, the cooling time is still too long. In addition, in the process of transferring the trimmed forgings to the water tank, it is very easy to cause quality problems such as surface bumps of the forgings due to transportation transfer or improper operation of workers. In order to solve this problem, the forgings are further treated by the first water tank before being cooled by water, including:

[0068] First, spray cooling water on both ends of the forging to pre-cool the two ends of the forging;

[0069] The forging is transferred to the first water tank for cooling by clamping and supporting both ends of the forging by a fixed frame;

[0070] Use an air jet to dry the surface of the cooled forging;

[0071] The first water tank is divided into a plurality of cooling zones, and the temperature of cooling water in the plurality of cooling zones is gradually reduced, so that the forgings are cooled step by step from the cooling zone with a high temperature to the cooling zone with a low temperature.

[0072] The invention prevents the forging surface from being bumped during the forging transfer process by precooling the two ends of the forging, and dries the forging surface after cooling through the air nozzle, which is beneficial to subsequent processing.

[0073] Forgings may crack when the temperature drops rapidly. In order to avoid cracking of forgings, the first water tank is divided into multiple cooling zones, and the temperature of the cooling water in the multiple cooling zones is gradually reduced, so that the forgings are cooled step by step from the cooling zone with high temperature to the cooling zone with low temperature. The temperature of the cooling water used to cool the forgings is gradually reduced to gradually cool the forgings. The forgings are cooled from the outside to the inside, which will not cause cracking on the surface of the forgings and has a good cooling effect.

[0074] A collecting box is arranged on one side of the first water tank, and the cooling water in the cooling zone with a lower temperature is transported to the adjacent cooling zone with a higher temperature or to the adjacent collecting box through the first water pump.

[0075] The cooling water in the plurality of cooling zones is transferred in sequence by the first water pump, and the cooling water is reused multiple times, thereby saving water resources and facilitating the adjustment of the temperature of the cooling water inside the cooling zones.

[0076] The cooling water at the top of the lower temperature cooling zone is transported to the bottom of the adjacent higher temperature cooling zone or the bottom of the adjacent collecting box by the first water pump. This method of inputting and outputting cooling water facilitates the uniform mixing of cooling water in the cooling zone, thereby making the forging temperature drop more uniform.

[0077] The cooling water in the collection box is sprayed to both ends of the forging by the second water pump and the water nozzle to pre-cool the two ends of the forging. The cooled waste water is transported by the second water pump 1 to pre-cool the two ends of the forging that has just been trimmed, and the cooling water is reused. The cooling water inside the collection box will not be overcooled, and while cooling the ends of the forging, it will not cause deformation or cracking of the two ends of the forging.

[0078] When forgings are water-cooled, a large amount of water vapor will be generated. When a large amount of water vapor diffuses, it will scald the staff. In order to solve this problem, when the forgings are cooled inside the cooling zone, the cooling zone is sealed to prevent the water vapor generated during the cooling process from escaping.

[0079] Furthermore, a second water tank is provided on one side of the first water tank, and a conveyor belt is provided in the second water tank. The forgings cooled in the first water tank are moved to the second water tank for cooling again, and then the conveyor belt transports the cooled forgings to the operating table on one side of the second water tank, and the forgings are blown dry by the air nozzle during the conveying process of the conveyor belt. After the forgings are cooled, the residual moisture on the surface of the forgings needs to be blown dry, and the forgings are blown dry during the process of transferring the forgings by the conveyor belt.

[0080] The operators inspect the forgings one by one after they have been blown dry on the operating table, and directly load the forgings that meet the requirements in appearance and size into the heat treatment rack.

[0081] In another aspect of the present invention, Figure 2 As shown, a water-cooling production system for aluminum alloy forgings is provided, comprising:

[0082] Chain plate type double zone heating furnace, used to heat aluminum alloy raw materials to forging temperature to obtain blanks;

[0083] Electric screw press, used to process aluminum alloy blanks into the required shape;

[0084] Open presses, used to remove excess material and burrs produced during the forging process;

[0085] Water cooling device, used for cooling aluminum alloy forgings by water;

[0086] Heat treatment rack, used to support and fix aluminum alloy forgings;

[0087] Heat treatment equipment, used for heating and quenching aluminum alloy forgings;

[0088] Sandblasting machine, used to remove the oxide scale and burrs on the surface of aluminum alloy produced during the forging process;

[0089] The chain plate type double-zone heating furnace, electric screw press, open press, water cooling device, heat treatment rack, heat treatment equipment, and sandblasting machine are arranged in sequence along the conveying direction of the aluminum alloy forgings.

[0090] The specific structure of the water cooling device for aluminum alloy forging processing involved in this method is further defined below.

[0091] like Figure 3 As shown, the present invention provides a water cooling device for aluminum alloy forging processing, comprising:

[0092] The second water tank 18 is used to hold cooling water to cool the forgings;

[0093] A water inlet pipe 27, which is connected to the water inlet pipe and is used to inject cooling water into the second water tank 18;

[0094] A water pump 26 is provided at one side of the second water tank 18 and is connected to a water outlet pipe 28 for discharging cooling water in the second water tank 18;

[0095] A conveyor belt 20 is disposed inside the second water tank 18. The conveyor belt 20 is disposed obliquely, one end of the conveyor belt 20 is disposed at the bottom of the second water tank 18, and the other end of the conveyor belt 20 is disposed at the top of the second water tank 18;

[0096] An operating table 19 is fixed on the top of one side of the second water tank 18 and is used to place the cooled forgings, and one end of the top of the conveyor belt 20 is overlapped on one side of the top of the operating table 19;

[0097] The clamping plates 21 are evenly distributed on the outer surface of the conveyor belt 20, and a placement area 22 for placing forgings is located between two adjacent clamping plates 21;

[0098] The driving motor 29 is used to drive the conveyor belt 20 .

[0099] The water inlet pipe 27 of the water cooling device is connected to the water source in the factory building, and a certain water inlet flow rate is maintained when the water cooling device is working. At the same time, the water outlet pipe 28 and the water inlet pipe 27 are controlled by the water pump 26 to maintain the same flow rate, so that the water in the second water tank 18 is in a dynamically balanced flow state.

[0100] When the water cooling device is in working state, the production cycle of aluminum alloy forgings must be obtained first. For example, the production cycle of a certain automobile lower fork arm product is 60s. The drive motor 29 is adjusted to a specific speed so that the time interval of the placement area 22 passing through the operating table is 50s-55s. The 5s-10s are reserved to allow the operator to check the appearance of the workpiece and transfer the workpiece from the operating table 19. The interval of the placement area 22 is 500mm, which is suitable for the size of most aluminum alloy forgings. If there are forgings that are too large, the number of the clamping plates 21 can be changed later to adjust the interval of the placement area 22. The operator puts the trimmed forgings into the water cooling device in time. For example, the temperature of a certain automobile lower fork arm product after trimming is about 360°C. The forging sinks to the bottom of the second water tank 18 and falls on the transmission belt 20. As the drive motor 29 drives the transmission belt 20 to rotate, the forging follows the transmission belt 20 to move toward the operating table 19. When the forging climbs along the transmission belt 20, it falls into the placement area 22. The clamping plate 21 on the chain plate plays a role in supporting the forging. As the automobile lower fork arm forging comes out of water and falls onto the operating table, the surface temperature of the forging after coming out of water drops to 25-35°C.

[0101] On the operating table, quality personnel inspect the forgings one by one after they come out of the water, and those that meet the requirements in appearance and size are directly loaded into the heat treatment rack.

[0102] The present invention provides a second water tank 18 to quickly water-cool the final forging after trimming, so that its size is quickly stabilized, deformation is reduced, and the dimensional accuracy of the forging is ensured. Water cooling can make the structure of the aluminum alloy forging more compact and the grains refined, thereby improving the uniformity of the structure and mechanical properties, and eliminating residual stress, reducing the roughness of the trimming surface, improving the trimming quality, and at the same time reducing the cooling time and improving production efficiency.

[0103] The above cooling device has the problem that before the forging is placed in the second water tank 18, the surface of the forging is easily bumped during the transfer process, and the rapid cooling is easy to cause the forging to crack and deform. In order to solve this problem, a pre-treatment structure is added.

[0104] like Figure 4-5 As shown, the pre-processing structure includes:

[0105] A pre-cooling structure, used for pre-cooling the two ends of the forging, comprises a plurality of water spray nozzles 1, wherein the plurality of water spray nozzles 1 are arranged opposite to each other;

[0106] The multi-stage water cooling structure is used for multi-stage cooling of forgings, including a first water trough 2, wherein the first water trough 2 is arranged on one side of the second water trough 18, and a plurality of partitions 3 are fixed inside the first water trough 2, wherein the plurality of partitions 3 divide the interior of the first water trough 2 into a plurality of cooling zones 4, and the temperature of cooling water in the plurality of cooling zones 4 is gradually reduced, so that the temperature of cooling water in the cooling zone 4 on the side away from the water nozzle 1 is lower than the temperature of cooling water in the cooling zone 4 on the other side.

[0107] The drying structure is used to dry the surface of the forging after cooling, and includes a plurality of air nozzles 5, the plurality of air nozzles 5 are arranged opposite to each other, and the plurality of air nozzles 5 are respectively arranged on both sides of the conveyor belt 20;

[0108] Among them, the pre-cooling structure, multi-stage water cooling structure and blowing structure are arranged in sequence along the conveying direction of the forgings. The forgings first pass through the pre-cooling structure to cool down both ends, and then pass through the multi-stage water cooling structure for multi-stage cooling, and then pass through the second water tank 18 to cool down the forgings again, and finally the air nozzle 5 blows the moisture on its surface dry.

[0109] In this embodiment, multiple water nozzles 1 are used to pre-cool the two ends of the forging to prevent the surface of the forging from being bumped during the transfer of the forging, and the surface of the forging is cooled step by step through a multi-stage water cooling structure, which will not cause the forging to deform or crack, and the cooling is more thorough. The surface of the forging after cooling is dried through multiple air nozzles 5, which is beneficial for subsequent processing.

[0110] In actual use, 1. After the forgings are trimmed, they are placed on the conveyor belt during transportation, and the transportation is intermittent. Multiple water nozzles 1 are respectively arranged on both sides of the conveyor belt. When the forgings after trimming are transported between the water nozzles 1 on both sides, the water nozzles 1 spray high-pressure cooling water to both ends of the forgings, and the two ends of the forgings are quickly cooled, so that the subsequent forgings are transferred from the conveyor belt to the first water tank 2 for internal cooling, and no surface bumps occur;

[0111] 2. The forgings transferred to the first water tank 2 enter into multiple cooling zones 4 in sequence, and first enter into the cooling zone 4 with a high temperature, and finally enter into the cooling zone 4 with a low temperature, so as to cool the forgings step by step to prevent the forgings from cracking and deforming due to rapid cooling;

[0112] 3. The cooled forging is transported between the air nozzles 5 which are arranged opposite to each other, and the air nozzles 5 dry the moisture on the surface of the forging.

[0113] As a preferred embodiment of this embodiment, a collecting box 6 is provided on one side of the first water tank 2 close to the water nozzle 1;

[0114] A water inlet pipe 7 is connected to the bottom of the cooling zone 4 away from the collecting box 6, and a water outlet pipe 8 is connected to the collecting box 6;

[0115] A first water pump 9 is provided between two adjacent cooling zones 4 and between the collecting box 6 and the adjacent cooling zone 4. The first water pump 9 is used to transport the cooling water inside the cooling zone 4 on the side away from the collecting box 6 to the adjacent cooling zone 4 on the side close to the collecting box 6 or inside the collecting box 6. By providing the first water pump 9, the cooling water inside two adjacent cooling zones 4 can be transferred to achieve multiple utilization of cooling water, save water resources, and reduce costs. At the same time, the cooling water temperature inside multiple cooling zones 4 can be gradually reduced.

[0116] A temperature sensor 10 is provided inside the cooling zone 4 to monitor in real time the temperature of the cooling water inside the cooling zone 4. By providing the temperature sensor 10, the temperature of the cooling water in each cooling zone 4 can be regulated in real time to prevent the temperature of the cooling water in each cooling zone 4 from being too high or too low.

[0117] If the cooling water at the top of the cooling zone 4 with a lower temperature is transported to the top of the cooling zone 4 with a higher temperature, it is difficult for the cooling water in the cooling zone 4 with a higher temperature to have a good cooling effect. In order to quickly cool the cooling water in the cooling zone 4, further, the input end of the first water pump 9 is set at the top of the cooling zone 4, and the output end of the first water pump 9 is set at the bottom of the cooling zone 4 or the bottom of the collecting box 6, so that the temperature of the cooling water in multiple cooling zones 4 is successively reduced along the forging conveying direction, and is in a dynamically balanced flow state. By setting the input end and output end of the first water pump 9, the cooling water with a low temperature is input from the bottom of the cooling zone 4, and the cooling water with a high temperature is output from the top of the cooling zone 4.

[0118] A second water pump 11 is provided on one side of the collecting box 6, the input end of the second water pump 11 is connected to the collecting box 6, the output end of the second water pump 11 is connected to the water nozzle 1, and the second water pump 11 is a high-pressure pump;

[0119] The second water pump 11 extracts the cooling water in the collection box 6 and transports it to the inside of the water nozzle 1, and then the water nozzle 1 sprays it to both ends of the forging, thereby pre-cooling both ends of the forging. The cooled waste water is transported by the second water pump 11 to pre-cool both ends of the forging that has just been trimmed, and the cooling water is reused. The cooling water in the collection box 6 will not be overcooled, and while cooling the ends of the forging, it will not cause deformation or cracking of the ends of the forging.

[0120] A structure for transferring forgings is required between the pre-cooling structure and the multi-stage water cooling structure. Furthermore, a movable plate 12 is provided on the top of the first water trough 2, and the movable plate 12 moves along the length direction of the first water trough 2. Two fixed frames 13 are provided at the bottom of the movable plate 12, and the two fixed frames 13 are respectively used to support and fix the two ends of the forgings. The fixed frames 13 are controlled to move up and down by hydraulic rods 14, thereby driving the forgings on the fixed frames 13 to move up and down.

[0121] In actual use, after the forging is trimmed, it is transported to the top of the collection box 6 by the conveyor belt, and the forging is set between the relatively set water nozzles 1, so that the movable plate 12 moves toward the collection box 6, which drives the fixed frame 13 to move toward the collection box 6, and the hydraulic rod 14 is used to control the fixed frame 13 to move downward, so that the height of the fixed frame 13 is lower than the height of the forging, and then the movable plate 12 continues to move toward the forging, so that the fixed frame 13 is directly below the forging. At this time, both ends of the forging have been pre-cooled, and the fixed frame 13 is moved up by the hydraulic rod 14, so that the forging is transferred to the fixed frame 13. The number of fixed frames 13 is set to two, which support the two ends of the forging respectively. Since the two ends of the forging have been pre-cooled, the fixed frame 13 will not cause the two ends of the forging to collide or dent, and then the movable plate 12 is moved to the top of the cooling zone 4, and then the fixed frame 13 is moved down by the hydraulic rod 14, which synchronously drives the forging to move downward, so that the forging is placed inside the cooling zone 4, and the cooling water inside the cooling zone 4 cools the forging.

[0122] The hydraulic rod 14 controls the forging to move up and down, and the movable plate 12 controls the forging to move horizontally, so that the forging passes through multiple cooling zones 4 in sequence, and the forging is cooled in sequence to achieve step-by-step cooling, without causing cracking or deformation on the forging surface due to rapid cooling.

[0123] A large amount of water vapor will be generated when the forgings are water-cooled, and a large amount of water vapor will scald the staff when it diffuses. In order to solve this problem, grooves 15 are provided on the top of one side of the second water tank 18, on both sides of the top of the first water tank 2, on both sides of the top of the collecting box 6, and on the top of the partition 3. Baffles 16 are fixedly connected to both sides of the bottom of the movable plate 12, and the baffles 16 match the grooves 15, so that the movable plate 12 moves to the top of the cooling zone 4, and when the two baffles 16 at the bottom of the movable plate 12 correspond to the positions of the grooves 15, a closed space is formed in the cooling zone 4, thereby preventing the water vapor generated during cooling from dissipating.

[0124] By providing the baffle 16, when the movable plate 12 moves to the top of the cooling zone 4 and causes the forging to move down to the cooling water for cooling, the baffle 16 is just stuck in the groove 15, so that a closed space is formed in the cooling zone 4, that is, the movable plate 12, the baffle 16, the first water tank 2 and the partition 3 together form a closed space, preventing the water vapor generated by the cooling from escaping, thereby improving the safety of the device.

[0125] In order to mix the cooling water in the cooling zone 4 evenly and make the cooling of the forgings more even, a plurality of air outlets 17 are installed on the inner wall of the first water tank 2, and the air outlets 17 are connected to compressed air, and the cooling water in the first water tank 2 is made to surge by injecting compressed air into the first water tank 2. Since the cooling water in the cooling zone 4 is in a dynamic equilibrium state, it continuously flows in and out, and compressed air is injected into the first water tank 2 to make the cooling water in the first water tank 2 surge, so that the cooling water in the cooling zone 4 is more even.

[0126] After the forging is cooled, it is necessary to blow dry the residual moisture on the surface of the forging. Furthermore, a second water tank 18 is provided on the side of the first water tank 2 away from the collecting box 6, and an operating table 19 is provided on the side of the second water tank 18 away from the collecting box 6. A conveyor belt 20 is provided inside the second water tank 18, and one end of the conveyor belt 20 is arranged inside the second water tank 18, and the other end of the conveyor belt is arranged on the top of the second water tank 18;

[0127] The conveyor belt 20 is provided with a plurality of evenly spaced clamping plates 21 , and a placement area 22 for placing forgings is provided between two adjacent clamping plates 21 . The plurality of air nozzles 5 are respectively arranged on both sides of the conveyor belt 20 .

[0128] The forgings are transferred to the second water tank 18 through the movable plate 12 and the fixed frame 13, and then transferred to the placement area 22. The cooling water in the second water tank 18 cools the forgings again. With the transmission of the conveyor belt 20, the forgings are transported upward and finally arrive at the operating table 19. In the process of transporting the forgings upward, the air nozzles 5 on both sides spray high-pressure gas to the forgings to dry the surface of the forgings, which is beneficial to the subsequent processes.

[0129] The clamping plate 21 is provided with a plurality of water leaking holes 23. The cooling water on the forging flows back to the inside of the second water tank 18 through the water leaking holes 23.

[0130] The moving structure of the moving plate 12 is described in detail below. Slide blocks are fixedly connected to both sides of the bottom of the moving plate 12. Slide blocks are provided on both sides of the top of the first water tank 2, both sides of the top of the second water tank 18, and both sides of the top of the collecting box 6. Slide blocks are slidably connected to the slide blocks.

[0131] The movable plate 12 is provided with a threaded rod 24 inside, and the movable plate 12 is threadedly connected to the threaded rod 24, and the end of the threaded rod 24 is connected to a first motor 25, and the threaded rod 24 is driven to rotate by the output shaft of the first motor 25, so that the movable plate 12 moves along the length direction of the first water tank 2. The movable plate 12 is moved horizontally by rotating the threaded rod 24.

[0132] The following is further described in conjunction with specific embodiments:

[0133] Comparative Example 1: The conventional aluminum alloy forging process is adopted to forge according to the following steps to obtain a forging: blanking → heating → blank making → pre-forging → final forging → trimming → static cooling → heat treatment → surface treatment.

[0134] Embodiment 1: Aluminum alloy is subjected to blanking, heating, blanking, pre-forging, final forging and trimming in sequence;

[0135] The trimmed forging is placed in a water cooling device to cool the forging;

[0136] Carry out appearance inspection on the forgings after water cooling, and place qualified products directly in the heat treatment rack;

[0137] After water cooling and racking, the forgings are subjected to heat treatment and surface treatment in sequence;

[0138] Get forgings.

[0139] The forgings obtained above were sampled and analyzed at the same position and tested for mechanical properties. The test results are shown in the following table:

[0140]

[0141] The following conclusions can be drawn from the analysis of the above table:

[0142] The production process involving water cooling has improved the mechanical properties of aluminum alloys. The hardness, tensile strength and yield strength have all been significantly improved, while the elongation has remained basically unchanged.

[0143] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A water-cooling production process for aluminum alloy forgings, characterized in that: The following steps are involved: The aluminum alloy is subjected to cutting, heating, blanking, pre-forging, final forging and trimming in sequence; The trimmed forging is placed in a water cooling device to cool the forging; Carry out appearance inspection on the forgings after water cooling, and place qualified products directly in the heat treatment rack; After water cooling and mounting, the forgings are subjected to heat treatment and surface treatment in sequence.

2. The water-cooling production process for aluminum alloy forgings according to claim 1, characterized in that: The specific steps for water cooling forgings include: Put the forging into the first water tank for water cooling; The forgings in the water tank are transported upward to the operating table in sequence through the conveyor belt; The forgings after water cooling are visually inspected on the operating table, and qualified products are directly placed in the heat treatment rack.

3. The water-cooling production process for aluminum alloy forgings according to claim 2, characterized in that: Before cooling the forging by water through the first water tank, a pre-treatment step is also included, including: First, spray cooling water on both ends of the forging to pre-cool the two ends of the forging; The forging is transferred to the first water tank for cooling by clamping and supporting both ends of the forging by a fixed frame; Use an air jet to dry the surface of the cooled forging; The first water tank is divided into a plurality of cooling zones, and the temperature of cooling water in the plurality of cooling zones is gradually reduced, so that the forgings are cooled step by step from the cooling zone with a high temperature to the cooling zone with a low temperature.

4. The water-cooling production process for aluminum alloy forgings according to claim 3 is characterized in that: A collecting box is arranged on one side of the first water tank, and the cooling water in the cooling zone with a lower temperature is transported to the adjacent cooling zone with a higher temperature or to the adjacent collecting box through the first water pump.

5. The water-cooling production process for aluminum alloy forgings according to claim 4, characterized in that: The cooling water at the top of the cooling zone with a lower temperature is transported to the bottom of the adjacent cooling zone with a higher temperature or to the bottom of the adjacent collecting box through the first water pump.

6. The water-cooling production process for aluminum alloy forgings according to claim 5, characterized in that: The cooling water in the collection box is sprayed to both ends of the forging through the second water pump and the water nozzle to pre-cool the two ends of the forging.

7. The water-cooling production process for aluminum alloy forgings according to claim 6, characterized in that: When the forging is cooled inside the cooling zone, the cooling zone is sealed to prevent the water vapor generated during the cooling process from escaping.

8. The water-cooling production process for aluminum alloy forgings according to claim 7, characterized in that: A second water tank is provided on one side of the first water tank, and a conveyor belt is provided in the second water tank. After being cooled in the first water tank, the forgings are moved to the second water tank for cooling again, and then the cooled forgings are transported to the operating table on one side of the second water tank by the conveyor belt. During the conveying process of the conveyor belt, the forgings are blown dry by the air nozzle.

9. The water-cooling production process for aluminum alloy forgings according to claim 8, characterized in that: The operators inspect the forgings one by one after they have been blown dry on the operating table, and directly load the forgings that meet the requirements in appearance and size into the heat treatment rack.

10. A water-cooled production system for aluminum alloy forgings, characterized in that: include: Chain plate type double zone heating furnace, used to heat aluminum alloy raw materials to forging temperature to obtain blanks; Electric screw press, used to process aluminum alloy blanks into the required shape; Open presses, used to remove excess material and burrs produced during the forging process; Water cooling device, used for cooling aluminum alloy forgings by water; Heat treatment rack, used to support and fix aluminum alloy forgings; Heat treatment equipment, used for heating and quenching aluminum alloy forgings; Sandblasting machine, used to remove the oxide scale and burrs on the surface of aluminum alloy produced during the forging process; The chain plate type double-zone heating furnace, electric screw press, open press, water cooling device, heat treatment rack, heat treatment equipment, and sandblasting machine are arranged in sequence along the conveying direction of the aluminum alloy forgings.

Images