KR101226943B1 - aluminium alloy plate heat treatment apparatus - Google Patents

Abstract

The present invention relates to a heat treatment apparatus for producing an aluminum alloy plate for performing the solution and quenching process of the aluminum alloy plate. A heat treatment apparatus for producing an aluminum alloy plate according to the present invention includes a heating furnace for heating an aluminum alloy plate for solution treatment of an aluminum alloy plate; An inner chamber provided inside the furnace to accommodate the aluminum alloy plate and having an upper center and a lower portion opened to circulate the heated air in and out according to the operation of the furnace; A circulation fan provided in the upper central opening of the inner chamber to circulate heated air into and out of the inner chamber by sucking air in the inner chamber and discharging the air out of the inner chamber; It is provided inside the inner chamber, the upper opening is formed so that the air moved by the suction force of the circulation fan is passed, is moved up and down inside the inner chamber, when located above the inner chamber, the inner chamber inner air is circulated A lift loop which guides the fan to flow into the fan and covers the lower opening of the furnace to block movement of heat into and out of the furnace when located below the inner chamber; A cooling tank provided under the heating furnace to quench the solution-alloyed aluminum alloy plate; An alloy plate jig for accommodating and mounting the aluminum alloy plate and moving up and down between the heating furnace and the cooling tank for solution treatment and quenching treatment of the aluminum alloy plate; And elevating means for elevating the elevating loop and the alloy plate jig.

Description

Aluminum alloy plate heat treatment apparatus

The present invention relates to a heat treatment apparatus, and more particularly, to a heat treatment apparatus for producing an aluminum alloy plate for performing the solution and quenching process of the aluminum alloy plate.

In general, an aluminum alloy plate is manufactured through an aluminum alloy ingot, followed by heat treatment such as solution treatment, quenching treatment, and age hardening treatment. Through such heat treatment, aluminum alloy ingots have very low surface flatness due to process phenomena (burning), expansion, shape deformation, discoloration, and so on. Degrades.

In order to solve this problem, conventionally, a means for adjusting the heat treatment temperature or the temperature increase rate or preventing other deformation has been devised. However, it is almost impossible to effectively correct the deformation of the alloy ingot by a method such as the control of the temperature or the temperature increase rate, and it is very difficult to improve the deterioration of the surface quality due to discoloration or contaminant confinement. In order to improve the surface quality, the surface of the alloy plate is stretched or leveled after heat treatment to planarize the surface and polish the surface of the alloy plate.

However, such stretching, leveling, and surface polishing operations are a kind of post-treatment process performed after deformation by heat treatment, and the work efficiency is very difficult and time-consuming in the post-treatment process once severe deformation occurs. There is a disadvantage of falling. Therefore, minimizing the deformation of the alloy plate itself in the heat treatment process will be called a more efficient method.

The main factors of deformation and discoloration of aluminum alloy plate in heat treatment process are sudden temperature change by solution and quenching process, uneven temperature condition during each work process, and temperature due to exposure of alloy plate to outside air during movement of alloy plate between work processes. This is mostly due to change, surface oxidation and other foreign material deposition. More specifically, in the case of a conventional heat treatment equipment, solutionization and quenching are performed independently of each other, and when the alloy plate is moved between the solutionization process and the quenching process, the alloy plate is exposed to the outside air so that deformation occurs due to surface temperature change. Or there is a disadvantage in that the surface quality is deteriorated due to the discoloration and foreign matters, there has been a problem that the deformation is more severe because the processing temperature of the alloy plate is not uniform during each process operation.

Here, the temperature change by the solution and quenching process is required to reinforce the alloy plate structure, and thus the deformation of the alloy plate is indispensable, but the nonuniformity of the processing temperature and the inter-process alloy plate during each process operation Deformation and discoloration due to contact with the outside air during the movement of the can be prevented or minimized through the improvement of the installation structure. Therefore, in order to improve the efficiency of the aluminum alloy plate manufacturing process and the surface quality of the alloy plate, there is an urgent need to improve the structure of the heat treatment equipment to prevent or minimize the deformation and discoloration occurring during the heat treatment process of the aluminum alloy plate.

The present invention was devised to solve the problems of the conventional heat treatment equipment for manufacturing aluminum alloy plate as described above, so that the alloy plate is not exposed to the outside air during the movement of the alloy plate between the solution process and the quenching process of the aluminum alloy plate, It is an object of the present invention to provide a heat treatment apparatus for manufacturing an aluminum alloy plate that can improve surface quality and work efficiency by minimizing deformation and discoloration of the aluminum alloy plate by maintaining uniformity of processing temperature during processing.

Heat treatment apparatus for manufacturing an aluminum alloy plate according to the present invention for achieving the above object, heating the aluminum alloy plate for the solution treatment of the aluminum alloy plate, the heating provided with a slide door that can be opened and closed in the horizontal direction at the bottom Rowa; An inner chamber provided inside the furnace to accommodate the aluminum alloy plate and having an upper center and a lower portion opened to circulate the heated air in and out according to the operation of the furnace; A circulation fan provided in the upper central opening of the inner chamber to circulate heated air into and out of the inner chamber by sucking air in the inner chamber and discharging the air out of the inner chamber; It is provided inside the inner chamber, the upper opening is formed so that the air moved by the suction force of the circulation fan is passed, and is moved up and down inside the inner chamber, when located above the inner chamber, the inner chamber inner air is circulated A lift loop which guides the fan to flow into the fan and covers the lower opening of the furnace to block movement of heat into and out of the furnace when located below the inner chamber; A cooling tank provided under the heating furnace to quench the solution-alloyed aluminum alloy plate; An alloy plate jig for accommodating and mounting the aluminum alloy plate and moving up and down between the heating furnace and the cooling tank for solution treatment and quenching treatment of the aluminum alloy plate; And elevating means for elevating the elevating loop and the alloy plate jig.

Here, the heating furnace is composed of a housing having a lower opening, the lower end is formed with a locking projection protruding inward so that the lifting loop is seated and supported when the lifting loop is lowered, the inner wall heat generation for heating the aluminum alloy plate The heater is built in.

The apparatus further includes an inverter for controlling the rotation speed and the rotation direction of the circulation fan, wherein the inverter sucks air in the internal chamber when the slide door of the heating furnace is closed for solution treatment of the aluminum alloy plate. Control the discharge, and if the slide door of the heating furnace is opened for quenching treatment after solution treatment of aluminum alloy plate, the rotation speed of the circulation fan is continuously reduced or the rotation speed is decreased to reverse rotation after stopping. The air is blown at a constant pressure to control water vapor and cold air generated from the cooling tank to be prevented from rising into the heating furnace.

The lifting means includes a motor capable of forward and reverse rotation; A chain lifted by the driving of the motor, one end penetrating into the heating furnace and the other end disposed perpendicular to the outside of the heating furnace; A hook coupled to one end of the chain penetrated into the heating furnace; A catching piece provided on an upper side of the hook and supported by the upper inner side of the elevating loop to prevent the hook from escaping to the upper outer side of the elevating loop when the chain is raised; It includes a weight provided on the other end of the chain.

In addition, the hook is formed on the upper portion of the alloy plate jig so that the hook of the lifting means can be caught.

On the other hand, the cooling tank is provided with a stirrer for circulating the cooling water, the stirrer is composed of the outer duct and the screw pump on the inside, by forcing the suction of the cooling water under the cooling tank by the screw pump on one side of the duct to the other side of the duct It is preferable to force circulation of the cooling water by discharging the sucked cooling water upwards.

According to the present invention as described above, when the alloy plate is moved between the solution process and the quenching process of the aluminum alloy plate, the alloy plate is not exposed to the outside air, and the uniformity of the processing temperature is maintained during each process operation to maintain the uniformity of the aluminum alloy plate. Minimizing deformation and discoloration has the advantage of improving surface quality and work efficiency.

In addition, the present invention is due to the installation of the lifting loop, during the quenching operation, the inlet temperature of the furnace due to the external air inflow due to the opening of the lower slide door during the quenching operation and the inflow of water vapor generated in the quenching process into the furnace It prevents unnecessary consumption of power energy required when reheating by maintaining the temperature and atmosphere in the furnace for the next continuous solution work, maximizing energy efficiency and reducing workup time required for reheating. Has

1 is a front view of a heat treatment apparatus for manufacturing an aluminum alloy plate according to the present invention,
2 is a side view of a heat treatment apparatus for manufacturing an aluminum alloy plate according to the present invention;
3 is a partially exploded perspective view illustrating a coupling relationship between an inner chamber and an alloy plate jig, a lifting means, and a lifting loop of the heat treatment apparatus for manufacturing an aluminum alloy plate according to the present invention;
4 is an operational state diagram of a heat treatment apparatus for manufacturing an aluminum alloy plate according to the present invention.

Hereinafter, the configuration and operation relationship of the heat treatment apparatus for manufacturing an aluminum alloy plate according to the present invention will be described in detail with reference to the preferred embodiments and the accompanying drawings.

As shown in Figure 1 and 2, the heat treatment apparatus for manufacturing an aluminum alloy plate according to the present invention is the main frame 10, the heating furnace 20, the inner chamber 30, the circulation fan 40, the lifting loop 50 ), Alloy plate jig 60, the cooling tank 90 and the lifting means (70).

The mainframe 10 is a part supporting the detailed components constituting the heat treatment apparatus according to the present invention, such as a heating furnace 20, a cooling tank 90, and a lifting means 70, which will be described later, and generally a skeleton of a hexahedron Consists of a frame forming, and can be produced in various forms according to the installation position and size of the heating furnace 20 and the cooling tank 90 and other components.

The heating furnace 20 is a part for accommodating the aluminum alloy plate and heating it to a high temperature in order to melt the aluminum alloy plate. In the heat treatment of an aluminum alloy, it is necessary to first make a solid solution in order to use the precipitation hardening reaction, which is called a solvation treatment, and its purpose is to hold the solute element that can be dissolved in the solid solution to the maximum. Specifically, the alloy ingot is heated and maintained at a high temperature immediately below the melting start temperature of about 500 ° C. to eliminate the unevenness of the structure and components due to segregation and to sufficiently melt the solute atom in the form of a matrix to obtain a supersaturated solid solution. In the present invention, the aluminum alloy plate is mounted on the alloy plate jig 60, which will be described later, loaded into the heating furnace 20 and maintained at 500 ° C. or higher, preferably 530 ° C. to 540 ° C. for 3 to 4 hours. The solution treatment is carried out by.

Specifically, the heating furnace 20 is fixedly installed in the upper inner side of the main frame 10, consisting of a housing of the hexahedron having a lower opening generally, the lower end of the lifting loop 50 when the lifting loop 50 to be described later ( A locking jaw 24 is formed to protrude inwardly so that 50 is seated and supported, and a heat generating heater 22 for heating the alloy plate is built in the inner wall. The heating heater 22 is configured to generate heat in accordance with the application of the power, is configured to increase the temperature inside the heating furnace 20 to a high temperature of about 500 ℃ or more at room temperature. The heating heater 22 may be used for all kinds of heaters used in ordinary electric furnaces, etc. It is particularly preferable that the heating heater 22 is a cantal wire investment heater. These heaters are already known configurations, and further description thereof will be omitted.

An inner chamber 30 is provided inside the heating furnace 20. The inner chamber 30 is composed of a housing of a hexahedron to correspond to the inner contour of the furnace 20 to accommodate an alloy plate to be heat treated therein, and a heating heater 22 installed on the inner wall of the furnace 20. In addition to preventing heat from being directly applied to the alloy plate to prevent local heating of the alloy plate, the air heated by the exothermic heater 22 is opened by the upper center and the lower part of the inner chamber 30. By circulating in and out of) serves to maintain a uniform temperature around the alloy plate.

On the other hand, the circulation fan 40 is provided in the upper central opening of the inner chamber 30 to circulate the heated air into and out of the inner chamber 30. The circulation fan 40 is a suction fan that sucks air in the internal chamber 30 and discharges it to the outside. As illustrated in FIG. 1, the circulation fan 40 includes a motor 42 provided at an upper outer side of the heating furnace 20. It is coupled to the belt 44 is rotated in accordance with the drive of the motor 42 and is coupled to the lower end of the rotary shaft 46 installed through the heating furnace 20, installed in the upper central opening of the inner chamber 30 do.

Through this configuration, as shown by the arrow in FIG. 1, the air inside the inner chamber 30 moves upwards according to the operation of the circulation fan 40 to move the heating furnace through the upper opening of the inner chamber 30. 20) the inner chamber 30 is discharged to the outside, and the discharged air is heated by the heating heater 22 of the heating furnace 20 and again inside the inner chamber 30 through the lower opening of the inner chamber 30 Will be moved to. As such, the air heated by the exothermic heater 22 flows into the inner chamber 30 to perform a solution treatment of the alloy plate, and the air deprived of heat after the solution treatment is transferred to the inner chamber by the circulation fan 40. (30) After being discharged to the outside, it is heated by the heating heater 22 again and re-introduced into the internal chamber 30, and this process is repeatedly performed, so that the temperature inside the internal chamber 30 is always maintained uniformly. As a result, uniformity of the structure of the alloy plate is ensured, and deformation of the alloy plate and deterioration of the surface quality due to uneven treatment temperature can be prevented.

The circulation fan 40 is preferably configured such that the rotational speed and the rotational direction can be controlled by the inverter. Such an inverter control method prevents water vapor generated from the cooling tank 90 and the circulation movement of heat between the heating furnace 20 and the cooling tank 90 during the quenching process to be described later to prevent the inflow into the heating furnace 20. The role of maintaining the uniformity of the temperature in the bar, the description of the principle and method of maintaining the uniformity of the process temperature by the inverter control of the circulation fan 40 will be described later.

A lifting loop 50 is provided inside the inner chamber 30. As shown in Figures 1 to 3, the lifting loop 50 is formed in a generally roof (roof) or canopy hood (hood) shape, the upper center in the inner chamber by the suction force of the circulation fan 40 The upper opening 50a is formed to allow the air inside to be discharged to the outside, and is lifted and lowered in the inner chamber 30 by elevating means 70, which will be described later, and positioned above the inner chamber 30. If the inner chamber 30 acts as a kind of hood to induce the internal air to smoothly flow into the circulation fan 40, when the lower side of the inner chamber 30, the alloy plate is described later cooling tank 90 When quenched in the serves as a cover to block the movement of heat and water vapor between the heating furnace 20 and the cooling tank 90.

The alloy plate jig 60 is a portion that is firmly mounted so as not to shake by vertically loading the aluminum alloy plate to be heat-treated, it is generally composed of a basket shape of a cube. For example, as shown in Figure 3, the alloy plate jig 60 is configured of a rectangular basket-shaped frame is configured to be supported from below in the state in which a plurality of aluminum alloy plate is standing vertically. Although not shown, it is preferable that the mounting grooves having a V-shaped cross-section supported by the alloy plate being fitted to support the alloy plate without shaking are formed at predetermined intervals inside the upper and lower portions of the alloy plate jig 60. Do. 3 illustrates a schematic illustration of the alloy plate jig 60, but the configuration of the alloy plate jig 60 is not limited thereto and may be manufactured in various structures and shapes.

The upper portion of the alloy plate jig 60 is formed with a locking hole 68 so that the hook 76 of the lifting means 70 to be described later can be caught. The structure of the locking mechanism 68 is not limited as long as the hook 76 can be caught and supported. Through such a configuration, as the hook 76 of the elevating means 70 to be described later is lifted while being supported by the catching hole 68, the elevating movement in the heating furnace 20 of the alloy plate jig 60 is performed. And it is possible to move up and down between the heating furnace 20 and the cooling tank (90).

On the other hand, the elevating means 70 is a driving means for elevating and moving the alloy plate jig 60 and the elevating loop 50, as already mentioned, the motor 72, the chain 74, the hook 76 And weight 78.

The motor 72 is fixed to the upper side of the main frame 10, is configured to be forward and reverse rotation, the motor shaft is provided with a sprocket for engaging the chain 74 to be described later. The chain 74 is engaged with the sprocket provided on one side of the motor shaft of the motor 72 and the other side is engaged with the sprocket separately installed on the upper portion of the main frame 10, and is configured to be elevated by the rotation of the motor shaft. The part penetrates into the heating furnace 20 and the other end is vertically disposed outside the heating furnace 20. Then, one end of the chain 74 penetrated into the heating furnace 20 is coupled to the hook 76 supported by the locking hole 68 of the alloy plate jig 60, the outer side of the heating furnace 20 The other end of the chain 74 is arranged vertically coupled to the weight 78 to maintain the tension of the chain 74 and to prevent the sudden rise and fall of the alloy plate jig 60 and the lifting loop 50 do.

In addition, the upper outer circumferential surface of the hook 76, the engaging piece which is supported on the upper inner side of the elevating loop 50 so that the hook 76 does not escape to the upper outer side of the elevating loop 50 when the chain 74 is raised ( 77 is further provided. The locking piece 77 is formed to be larger than the size of the through hole 50b formed so that the chain 74 penetrates the lifting loop 50, thereby preventing the hook 76 from being separated.

The locking holes 68 on the upper side of the alloy plate jig 60 may be provided at each of the left and right both sides, but if the size of the alloy plate is relatively large, two predetermined on each of the left and right sides so as to grasp the center without flow. It is preferable to be spaced apart. In this case, a separate chain and a motor may be provided for lifting and lowering the hooks 76 caught by the locking holes 68, but for the sake of simplicity, as shown in FIG. 1, one motor and one motor are provided. It is preferable that the hook 76 is configured to be elevated using a chain of.

To this end, as shown in FIG. 1, the chain 74 is engaged with a separate sprocket at the outside of the heating furnace 20 and is changed in direction to be bent into a substantially 'U' shape, and penetrates into the heating furnace 20. Hooks 76 are respectively coupled to both ends of the input chain 74. In addition, two sprockets are provided at different positions on both the motor shaft of the motor 72 and the upper portion of the main frame 10 so that both branches of the chain 74 are engaged with each other. In addition, the weight 78 is coupled to the lower side of the U'-shaped bent portion of the chain 74 disposed outside the heating furnace 20 through a wire or the like. Through this configuration, it is possible to raise and lower the alloy plate jig 60 without flow to the hook 76 at two different points using a single motor and chain.

On the other hand, the lower portion of the heating furnace 20 is provided with a slide door 80 that can slide open and close in the horizontal direction. The slide door 80 is to close the lower opening of the heating furnace 20 to prevent heat loss and maintain temperature uniformity during the solution treatment of the aluminum alloy plate in the heating furnace 20. One each of the lower left and right sides of the heating furnace 20 is installed, and includes an upper plate 82, a lower plate 84, a link member 86, and a door opening / closing cylinder 88.

The upper plate 82 slides toward the center from the lower left and right sides of the heating furnace 20 to open and close the lower opening of the heating furnace 20, and the lower plate 84 is provided below the upper plate 82. When the upper plate 82 closes the lower opening of the heating furnace 20, the upper plate 82 is pushed up to bring the upper plate 82 into close contact with the lower opening of the heating furnace 20 to seal the lower opening of the heating furnace 20. To improve the. In order to enable the upper plate 82 to be pushed up by the lower plate 84, as shown in FIG. 1, the upper plate 82 and the lower plate 84 are mutually connected by a plurality of link members 86 on the side surfaces. Connected. However, the sealing operation by the lower plate 84 will be described later.

On the other hand, the upper plate 82 or the lower plate 84 is coupled to the door opening and closing cylinder 88 for horizontally moving the upper plate 82 and the lower plate 84 by hydraulic or pneumatic. The door opening and closing cylinder 88 is installed horizontally parallel to the upper plate 82 and the lower plate 84, the distal end is fixed to the main frame 10, the cylinder rod portion is linked to the upper plate 82 or lower plate 84 Coupled by the member 86, the slide door 80 consisting of the upper plate 82 and the lower plate 84 open and close according to the expansion or contraction.

Directly below the heating furnace 20 is provided with a cooling tank 90 which is movable horizontally. The cooling tank 90 is a portion for quenching and cooling the aluminum alloy plate subjected to the solution treatment in the heating furnace 20. Quenching is a work process for rapidly cooling the solid solution formed at the solution treatment temperature to prevent solute atom precipitation. A high temperature supersaturated solid solution is introduced into water or quenching oil at room temperature to 100 ° C. and quenched to quench the state of high temperature to room temperature. Keep it. When quenching, the cooling rate needs to be cooled to 5 ° C / s or more from the solution treatment temperature to 120 ° C or less, and preferably cooled at a cooling rate of 10 ° C / s or more. If it is cooled faster than necessary, the deformation may be severe. On the contrary, if it is cooled too slowly, solute atoms are precipitated at grain boundaries, causing erosion of grain boundaries, and the effect of aging hardening cannot be enhanced. Corrosion resistance is also reduced.

The cooling tank 90 for performing the quenching process is composed of a cube-shaped housing having an upper portion substantially opened to fill the cooling water therein, and is provided with a supply and drainage facility (not shown) of the cooling water. In addition, the cooling tank 90 is preferably provided with a bogie 94 in the lower portion so as to be horizontally movable between the lower space and the outside of the main frame 10.

Generally, cooling water is used for quenching, in which case the cooling rate is adjusted by adjusting the liquid temperature. Therefore, in the case of using water, the liquid temperature must be adjusted correctly, and the higher the liquid temperature, the more vapor film is generated on the surface of the processed material and the longer it lasts, so it is not cooled at the moment when the vapor film is covered. At the same time, since the deformation is severe due to the temperature difference with the part without the vapor film, the circulation system of the liquid is required so that the vapor film can be quickly removed without being trapped for a long time. Accordingly, the agitator 92 is provided inside the cooling tank 90. 1 and 2, the stirrer 92 is composed of an outer duct 92a and an inner screw pump 92b, and cooled by a screw pump 92b at one side of the lower side of the duct 92a. After the coolant under the tank 90 is forcedly sucked in, the coolant sucked from the upper part of the other side of the duct 92a is discharged to the upper side to realize forced circulation of the coolant. According to the operation of the stirrer 92, cooling unevenness due to a phenomenon in which the steam film is partially generated in the alloy plate is prevented, thereby ensuring uniformity of the alloy plate surface quality.

On the other hand, the outer side of the main frame 10 is further provided with an alloy plate transport cart (100). The alloy plate transport cart 100 is a means for transferring the alloy plate jig, which is mounted on the alloy plate before heat treatment, to the lower space of the mainframe, and to carry out the alloy plate jig, which is mounted on the alloy plate, which is heat treated, to the outside.

The trolley 94 and the alloy plate transport trolley 100 at the lower portion of the cooling tank 90 are horizontally moved by the trolley transfer means 110 embedded in the ground, and may have a balance transfer means individually. It may also be configured to be movable together by the balance transfer means.

The balance transfer means 110 is a horizontal movement of the balance by driving the wheel of the lower portion of the balance by the motor, the reducer and the chain, the configuration of the balance transfer means 110 is a conventional description will be omitted.

So far, the configuration of the heat treatment apparatus for manufacturing an aluminum alloy plate according to the present invention has been described. Hereinafter, the operation relationship of the heat treatment apparatus will be described in detail with reference to FIGS. 4 to 6. FIG. 4 is a view illustrating a process in which an aluminum alloy plate is supplied to a heat treatment apparatus for manufacturing an aluminum alloy plate according to the present invention to perform solution solution, and FIG. 5 illustrates a process of quenching (cooling) an aluminum alloy plate in which solution treatment is completed. 6, the carrying out process of the aluminum alloy plate after heat treatment is shown in sequence.

First, as shown in Figure 4, the aluminum alloy plate (AP) is loaded on the alloy plate transport cart 100 in a state mounted on the alloy plate jig 60 for heat treatment. Then, the balance plate conveying means 110 is moved horizontally by the balance plate conveying means 100 is located below the heating furnace 20. At this time, the cooling tank 90 having the trolley 94 at the lower portion is disposed outside the main frame 10. When the alloy plate transport cart 100 is located below the heating furnace 20, the motor 72 of the elevating means 70 is driven to lower the chain 74 and the hook 76 to lower the hook 76 into the alloy sheet. It hangs on the latching opening 68 of the upper part 60, drives the motor 72 of the lifting means 70 to reverse rotation, raises the alloy plate jig 60, and injects it into the heating furnace 20 inside. After the operation, the door opening and closing cylinder 88 is operated so that the slide door 80 closes the lower opening of the heating furnace 20. At this time, the link member 86 connecting the upper plate 82 and the lower plate 84 of the slide door 80 maintains an angle of about 45 degrees in the open state, according to the operation of the door opening and closing cylinder 88 In the case of closing, the lower plate 84 is pushed by the door opening / closing cylinder 88 so that the link member 86 is deformed at an angle of about 60 degrees, so that the lower plate 84 presses the upper plate 82 upward. . According to this operation, the upper plate 82 pressurizes and seals the lower opening of the heating furnace 20 to produce a sealing effect.

The aluminum alloy plate introduced into the heating furnace 20 is heated by receiving heat radiated from the heating heater 22, and at this time, the heated air is circulated into and out of the inner chamber 30 by the circulation fan 40. Uniform heating of the alloy plate is performed.

On the other hand, when the alloy plate jig 60 is introduced into the heating furnace 20, the cooling tank 90 is moved horizontally by the trolley 94 and positioned below the heating furnace 20, so that the aluminum alloy after the solution treatment is completed. Wait for quenching treatment.

When the solution treatment in the furnace 20 is completed, as shown in FIG. 5, the motor 72 of the elevating means 70 is driven to drive the chain 74, the hook 76, and the hook 76. Alloy plate jig (60) supported by hanging) is moved downward to the cooling tank 90 for the quenching treatment. In order to move downward of the alloy plate jig 60, the slide door 80 is opened, at this time, the cold air of the cooling tank 90 by the suction force of the circulation fan 40 of the heating furnace 20, the heating furnace 20 may be sucked into the interior. As such, when cold air is sucked into the heating furnace 20, the internal temperature of the heating furnace 20 may be changed, thereby preventing quality from being heated to a uniform temperature of the alloy plate to be subsequently processed. In addition, when the heated aluminum alloy plate is cooled by quenching, water vapor is generated from the cooling tank 90, and the generated water vapor flows into the heating furnace 20 to cause stains on the surface of the aluminum alloy plate. Accordingly, when the slide door 80 is opened for the lowering of the alloy plate jig 60, means for preventing cold air from the cooling tank 90 from flowing into the heating furnace 20 should be taken.

In the present invention, there are two means for preventing the introduction of such cold air and water vapor. One means thereof is a lifting loop 50 provided inside the heating furnace 20. The lifting loop 50 is supported by the engaging piece 77 provided on the upper side of the hook 76 to be lifted up and down when the alloy plate jig 60, the alloy plate jig 60 is the cooling tank 90 In the case of being introduced downward, as shown in FIG. 5, the edge end portion is caught by the lower step 24 of the heating furnace 20 and no longer descends to cover the lower opening of the heating furnace 20. Accordingly, the water vapor generated from the cooling tank 90 during the cold and quenching of the cooling tank 90 is partially shielded by the lifting loop 50 to prevent the cooling tank 90 from being introduced into the heating furnace 20.

However, as shown in FIG. 3, since the upper opening 5a is formed at the center of the lifting loop 50 to install the circulation fan 40, the inflow of cold air and steam cannot be completely blocked. . Accordingly, the present invention employs an inverter control type circulation fan 40 as mentioned above as a means for blocking the inflow of cold air and water vapor in the heating furnace 20.

Specifically, in the case where solution treatment of the alloy plate is performed in the heating furnace 20, for circulation of the heating air, as shown by an arrow in FIG. 4, the circulation fan 40 has air inside the internal chamber 30. While the suction and discharge, the alloy plate jig 60 is lowered for the quenching of the alloy plate, the motor 42 of the circulation fan 40 is continuously reduced in rotation speed by the inverter and then stopped. Accordingly, since the suction force of the circulation fan 40 gradually decreases and disappears, air is prevented from flowing in from the lower portion of the heating furnace 20. In addition, in order to more effectively prevent the inflow of cold air and steam, it is also preferable to reverse the stationary circulation fan 40. In this case, as shown by the arrow in FIG. 5, the circulation fan 40 is controlled to blow air at a constant pressure (this is referred to as a 'blowing mode'). In this way, since the circulation fan 40 blows air downward, the rise of cold air generated from the cooling tank 90 is prevented by the pressure of the blown air, and the upper opening of the lifting loop 50 is closed. Through this, the cold air is not introduced into the furnace 20. The blowing action of this circulation fan 40 lasts for the quenching period of the alloy plate, and is then switched to suck air again (called 'suction mode'). The switching between the blowing mode and the suction mode may be performed depending on whether the slide door 80 is opened or closed. That is, when the slide door 80 is opened, the inverter controls the motor rotation speed of the circulation fan 40 to switch the circulation fan 40 to the blowing mode, and when the slide door 80 is closed again to the suction mode. To be converted. To this end, a sensor is provided for detecting whether the slide door 80 is opened or closed, or an operation algorithm is required to be programmed in a separate controller in advance.

When the quenching process is completed, as shown in FIG. 6, the alloy plate jig 60 is temporarily raised again into the heating furnace 20 and the cooling tank 90 is moved outward. Then, the alloy plate jig 60 is lowered again and carried out to the outside in the state loaded on the alloy plate transport cart (100).

In this manner, the heat treatment process of the aluminum alloy plate is completed, and a plurality of aluminum alloy plates are sequentially heat treated by repeatedly performing this process.

So far, the present invention has been described in detail with reference to embodiments of the present invention. However, the scope of the present invention is not limited thereto, and the present invention is intended to include practically equivalent ranges.

10: mainframe 20: heating furnace
22: heat heater 24: jam jaw
30: internal chamber 40: circulation fan
42: motor 44: belt
46: rotation axis 50: lifting loop
60: alloy plate jig 68: hook
70: lifting means 72: motor
74: chain 76: hook
78: weight 80: slide door
86: link member 88: door opening and closing cylinder
90: cooling tank 92: agitator
92a: Duct 92b: Screw Pump
94: trolley 100: alloy plate transfer trolley
110: balance transfer means

Claims (7)

A heating furnace for heating the aluminum alloy plate for solution treatment of the aluminum alloy plate, the slide door having a slide door capable of opening and closing in a horizontal direction;
An inner chamber provided inside the furnace to accommodate the aluminum alloy plate and having an upper center and a lower portion opened to circulate the heated air in and out according to the operation of the furnace;
A circulation fan provided in the upper central opening of the inner chamber to circulate heated air into and out of the inner chamber by sucking air in the inner chamber and discharging the air out of the inner chamber;
It is provided inside the inner chamber, the upper opening is formed so that the air moved by the suction force of the circulation fan is passed, and is moved up and down inside the inner chamber, when located above the inner chamber, the inner chamber inner air is circulated A lift loop which guides the fan to flow into the fan and covers the lower opening of the furnace to block movement of heat and water vapor into and out of the furnace when located below the inner chamber;
A cooling tank provided under the heating furnace to quench the solution-alloyed aluminum alloy plate;
An alloy plate jig for accommodating and mounting the aluminum alloy plate and moving up and down between the heating furnace and the cooling tank for solution treatment and quenching treatment of the aluminum alloy plate;
A heat treatment apparatus for producing an aluminum alloy plate, comprising elevating means for elevating the elevating loop and the alloy plate jig. The method of claim 1,
The heating furnace,
The lower part is composed of an opening, the lower end is formed with a locking projection protruding inward so that the lifting loop is seated and supported when the lifting loop is lowered, the inner wall is characterized in that the heating heater for heating the aluminum alloy plate is built-in Heat treatment apparatus for manufacturing aluminum alloy plate. The method of claim 1,
The inverter further includes an inverter for controlling the rotational speed and the rotational direction of the circulation fan, wherein the inverter sucks and discharges the air inside the internal chamber when the slide door of the heating furnace is closed for solution treatment of the aluminum alloy plate. When the slide door of the furnace is opened for quenching after solution treatment of aluminum alloy plate, the rotational speed of the circulation fan is continuously reduced to allow the inflow of cold air and steam generated from the cooling tank into the furnace. A heat treatment apparatus for producing an aluminum alloy plate, characterized in that the control is controlled to prevent it from becoming. The method of claim 3, wherein
When the slide door of the heating furnace is opened for quenching treatment after the solution of the aluminum alloy plate, the inverter continuously decreases the rotational speed of the circulation fan, stops it, and then rotates it in reverse to blow air at a constant pressure, thereby cooling the tank. The heat treatment apparatus for manufacturing an aluminum alloy plate, characterized in that to control to prevent the rising of cold air and steam generated from the inside of the heating furnace. The method of claim 1,
The lifting means,
A motor capable of forward and reverse rotation;
A chain lifted by the driving of the motor, one end penetrating into the heating furnace and the other end disposed perpendicular to the outside of the heating furnace;
A hook coupled to one end of the chain penetrated into the heating furnace;
A catching piece provided on an upper side of the hook and supported by the upper inner side of the elevating loop to prevent the hook from escaping to the upper outer side of the elevating loop when the chain is raised;
Heat treatment device for producing an aluminum alloy plate, characterized in that it comprises a weight provided on the other end of the chain. The method of claim 5, wherein
Heat treatment device for producing an aluminum alloy plate, characterized in that the hook is formed on the upper portion of the alloy plate jig so that the hook of the lifting means can be caught. The method of claim 1,
The cooling tank is provided with a stirrer for circulating the coolant, the stirrer is composed of a duct on the outside and the screw pump on the inside, forcibly sucked the cooling water in the lower side of the cooling tank by a screw pump on one side of the duct is sucked from the other side of the duct A heat treatment apparatus for producing an aluminum alloy plate, wherein the cooling water is forced to circulate by discharging the cooling water upward.

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