Aluminum honeycomb core passivation device and passivation method

Abstract

The present invention discloses an aluminum honeycomb core passivation device and passivation method in the field of aluminum material passivation technology. The device comprises a liquid agent inlet and outlet channel, an upper passivation part, a lower passivation part, and a pure water inlet channel. The liquid agent inlet and outlet channel serves as a delivery channel for a polishing agent or a passivating agent. The inner wall of the upper passivation part is movably penetrated and clamped with a movable plate. The movable plate divides the interior of the upper passivation part into a first chamber and a second chamber. The first chamber is located above the movable plate and is used to clean the aluminum honeycomb core. The top end of the lower passivation part is connected to the upper passivation part. The upper passivation part serves as a reaction chamber for the primary passivation of the aluminum honeycomb core, and the lower passivation part serves as a reaction chamber for the secondary passivation of the aluminum honeycomb core. By providing a structure that enables the aluminum honeycomb core to move during the passivation process, the present invention can passivate the blind area where the aluminum honeycomb core contacts the porous support plate, preventing the aluminum honeycomb core from having a passivation blind area, which is beneficial to improving the passivation quality of the aluminum honeycomb core.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum material passivation, in particular to an aluminum honeycomb core passivation device and a passivation method. Background Art

[0002] The aluminum passivation process is a completely chemical reaction. Treating aluminum parts with a passivation solution forms a uniform, dense, protective passivation film on their surfaces. This film primarily serves to extend the aluminum's corrosion and oxidation resistance. This improves the aluminum's salt spray corrosion resistance, greatly facilitating subsequent post-treatments such as electroplating, electrophoresis, anodizing, and spray coating, without affecting the aluminum's inherent electrical conductivity. Aluminum alloy passivation solution can promptly form a uniform, highly protective passivation film on the aluminum surface. It is suitable for corrosion protection of aluminum alloys and aluminum die-castings, forming a transparent, light-colored coating. It can also be used as a pre-treatment for spraying, powder coating, and gluing.

[0003] In the process of passivating a honeycomb core made of aluminum material, the currently used process method is to completely immerse the aluminum honeycomb core to be passivated in a passivation liquid to form a passivation layer. However, the existing passivation method cannot avoid contact between the aluminum honeycomb core and the inner wall of the passivation liquid container, so that a passivation blind spot always exists at the contact point, making the passivation layer thickness of other parts of the aluminum honeycomb core greater than the thickness of the passivation blind spot, resulting in inconsistent thickness of the passivation film layer on the surface of the aluminum honeycomb core, which is not conducive to improving the passivation quality of the aluminum honeycomb core. Summary of the Invention

[0004] The purpose of the present invention is to provide an aluminum honeycomb core passivation device and a passivation method. By setting a structure that can make the aluminum honeycomb core move during the passivation process, the blind area where the aluminum honeycomb core contacts the porous supporting plate can be passivated, thereby preventing the aluminum honeycomb core from having a passivation blind area, which is beneficial to improving the passivation quality of the aluminum honeycomb core.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides an aluminum honeycomb core passivation device, comprising a liquid agent inlet and outlet channel, an upper passivation portion, a lower passivation portion, and a pure water inlet channel, wherein the liquid agent inlet and outlet channel serves as a delivery channel for a polishing agent or a passivating agent;

[0007] The inner wall of the upper passivation part is movably penetrated and clamped with a movable plate, which divides the interior of the upper passivation part into a first chamber and a second chamber. The first chamber is located above the movable plate and is used for cleaning the aluminum honeycomb core.

[0008] The top end of the lower passivation part is connected to the upper passivation part, the upper passivation part serves as a reaction chamber for the primary passivation of the aluminum honeycomb core, and the lower passivation part serves as a reaction chamber for the secondary passivation of the aluminum honeycomb core;

[0009] The lower passivation part includes a lower passivation chamber, a positioning shaft connected to the connection between the lower passivation chamber and the upper passivation part, a porous lifting plate passing through the positioning shaft, and a steering gear. The output end of the steering gear is connected to a rotating block, which is used to support the bottom of the porous lifting plate so that the porous lifting plate is placed in a horizontal direction.

[0010] The pure water inlet channel is communicated with the liquid agent inlet and outlet channel, and the pure water inlet channel transports pure water to the passivation device to rinse the surface of the aluminum honeycomb core.

[0011] As a further solution of the present invention: the liquid inlet and outlet channel includes a first channel and a first ball valve installed on the first channel, one end of the first channel is connected to a first discharge pipe, the surface of the first discharge pipe is connected to a second ball valve, the first discharge pipe passes through the lower passivation chamber and discharges liquid into the lower passivation chamber, the second ball valve is used to control the on and off of the liquid in the first discharge pipe, the first ball valve is used to control the on and off of the liquid in the first channel, one end of the first channel serves as the liquid inlet and outlet end, the first channel is connected to an external liquid source through the liquid inlet and outlet end, a first lifting pump is installed on the surface of the first channel, and the first lifting pump is used to draw the liquid in the external liquid source into the first channel.

[0012] As a further solution of the present invention: a collecting trough is welded to the bottom of the lower passivation part, and the collecting trough surrounds the outer wall of the lower passivation bin. A "U"-shaped cavity is formed between the inner wall of the collecting trough and the outer wall of the lower passivation bin, which can be used to load liquid for cleaning the aluminum honeycomb core. The surface of the first channel is connected to a first drainage channel that runs through the collecting trough, and a third ball valve is installed on the surface of the first drainage channel. The surface of the liquid inlet and outlet channel is connected to a second drainage channel, and the second drainage channel includes a drain pipe connected to the first channel. The surface of the drain pipe is connected to a water valve, which is used to control the on and off of the water flow in the drain pipe. One end of the drain pipe is connected to a water pressure gauge, and one end of the water pressure gauge is connected to the water outlet.

[0013] As a further solution of the present invention: the inner wall of the first chamber is provided with a first drainage hole group and a second drainage hole group, the opening of the first drainage hole group is connected to a guide groove diagram, and by setting the guide groove drainage, the water for cleaning the aluminum honeycomb core in the first chamber can be drained, so as to facilitate the centralized collection of the cleaned water. The first drainage hole group includes a plurality of first drainage holes, and the second drainage hole group includes a plurality of second drainage holes. The first drainage holes and the second drainage holes are linearly arranged with equal spacing, and are used to adapt to the holes on the aluminum honeycomb core. When the aluminum honeycomb core is in the flushing process, the flushing water fills the holes on the aluminum honeycomb core. When overflowing, the flushing water can quickly flow out through the first drainage hole group, which is convenient for the rapid flushing of the aluminum honeycomb core, is beneficial to improving the passivation efficiency of the aluminum honeycomb core, and shortening the passivation period of the aluminum honeycomb core. The diameter of the first drainage hole is at least twice the diameter of the second drainage hole. The inner wall of the first chamber is provided with a card groove adapted to the movable plate. By setting the first drainage hole with a diameter larger than the diameter of the second drainage hole, the water in the first chamber can be quickly discharged when the amount of cleaning water is large, thereby preventing the water in the first chamber from gathering and preventing impurities after flushing from re-attaching to the surface of the aluminum honeycomb core.

[0014] As a further solution of the present invention: the porous lifting plate includes a flat plate and a perforation formed on the top of the flat plate, the perforation is used for the liquid discharged through the first discharge pipe, and the liquid enters the second chamber through the perforation, so that the aluminum honeycomb core can undergo a passivation reaction or a liquid polishing reaction in the second chamber. The porous lifting plate is used as a supporting structure for the aluminum honeycomb core in the second chamber. When the porous lifting plate is rotated to a horizontal direction with the center of the positioning axis, the servo is started, and the output end of the servo drives the rotating block to rotate in a horizontal direction. The rotating block rotates to the bottom of the porous lifting plate, which can maintain the horizontal placement of the porous lifting plate. There are several servos, which can simultaneously apply a supporting force to the bottom of the porous lifting plate through the rotating block, so as to maintain the reliable support of the porous lifting plate to the aluminum honeycomb core.

[0015] As a further solution of the present invention: the pure water inlet channel includes a second channel, the second channel is a three-way pipe, the second channel is connected to a second lifting pump, a connecting channel is connected between the second channel and the first channel, one end of the second channel is connected to a pure water discharge channel, the discharge port of the pure water discharge channel is opposite to the top opening of the upper passivation part, a fifth ball valve is installed on the pure water discharge channel, the pure water discharge channel and the connecting channel are used to divert the pure water flow in the second channel, and the second channel diverts the pure water to the pure water discharge channel and the connecting channel.

[0016] As a further solution of the present invention: the connecting channel is connected to a diversion channel, the diversion channel is connected to a third lift pump and a fourth ball valve, one end of the diversion channel passes through the second chamber, and the end of the diversion channel passing through the second chamber is used to discharge pure water, or passivation liquid, or polishing liquid into the second chamber.

[0017] As a further solution of the present invention: a first flowmeter is installed on the channel between the first discharge pipe and the connecting channel, a second flowmeter is connected to the surface of the second channel, and a third flowmeter is installed on the surface of the diversion channel. The first flowmeter is used to detect the liquid flow flowing into the first discharge pipe, the second flowmeter is used to detect the liquid flow flowing through the pure water discharge channel, and the third flowmeter is used to detect the liquid flow flowing through the diversion channel.

[0018] As a further solution of the present invention: an angle sensor is installed on the surface of the rotating block, the angle sensor is used to detect the rotation angle of the servo output end by detecting the rotating block, the output end of the angle sensor is electrically connected to the microprocessor, the output end of the microprocessor is electrically connected to the first flowmeter, the second flowmeter, the third flowmeter and the power module, the output end of the microprocessor is electrically connected to the display module and the alarm module, the side wall of the second chamber is installed with a first thermometer, the first thermometer is used to detect the temperature of the liquid in the second chamber, and the side wall of the lower passivation chamber is installed with a second thermometer, the second thermometer is used to detect the temperature of the liquid in the lower passivation chamber.

[0019] In a second aspect, the present invention further provides an aluminum honeycomb core passivation method, which is applied to the aluminum honeycomb core passivation device as described in the above solution. The aluminum honeycomb core passivation method comprises:

[0020] Rotate the porous lifting plate along the center of the positioning axis so that the porous lifting plate is arranged in a horizontal direction and serves as a partition between the second chamber and the lower passivation chamber;

[0021] The servo is started, and the output end of the servo drives the rotating block to rotate. The angle sensor collects the angle data signal of the rotating block and sends the angle data signal to the microprocessor. The microprocessor sends a stop signal to the servo to stop the output end of the servo;

[0022] Place the aluminum honeycomb core onto the porous lifting plate through the second chamber, open the second ball valve and the fourth ball valve, and close the third ball valve and the fifth ball valve;

[0023] Connect one end of the first channel to the liquid source, start the first lift pump, and introduce 35g / l to 70g / l of trivalent chromium salt aqueous solution into the first channel until the trivalent chromium salt aqueous solution submerges the aluminum honeycomb core. The reaction time is 2 minutes to 5 minutes.

[0024] The microprocessor sends a start signal to the servo, and the output end of the servo drives the rotating block to rotate away from the porous lifting plate. During the downward rotation of the porous lifting plate, the aluminum honeycomb core leaves the contact position of the porous lifting plate under the action of gravity and enters the lower passivation chamber, so that the blind area where the surface of the aluminum honeycomb core contacts the movable plate is passivated. By providing a structure that can move the aluminum honeycomb core during the passivation process, the blind area where the aluminum honeycomb core contacts the porous lifting plate can be passivated, thereby preventing the aluminum honeycomb core from having a passivation blind area, which is conducive to improving the passivation quality of the aluminum honeycomb core.

[0025] Take out the aluminum honeycomb core, push the movable plate along the slot to make the movable plate fully engage with the slot, and place the aluminum honeycomb core on top of the movable plate;

[0026] Close the second ball valve and the fourth ball valve, open the third ball valve and the fifth ball valve, start the second lift pump, let pure water flow into the second channel, and discharge the pure water into the interior of the upper passivation part through the pure water discharge channel to rinse the trivalent chromium salt solution remaining on the surface of the aluminum honeycomb core.

[0027] As a further solution of the present invention: a method for flushing the trivalent chromium salt aqueous solution remaining on the surface of the aluminum honeycomb core includes: the water for flushing the aluminum honeycomb core flows out of the upper passivation part through the first drainage hole group and the second drainage hole group, and flows into the collection tank, the cleaned water is collected by the collection tank, and when the water in the collection tank is discharged, the second ball valve, the fourth ball valve and the fifth ball valve are closed, the second ball valve and the water valve are opened, and the water in the collection tank is discharged to the water outlet end through the first channel.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. In the present invention, by providing a structure that can make the aluminum honeycomb core move during the passivation process, the blind area where the aluminum honeycomb core contacts the porous supporting plate can be passivated, thereby preventing the aluminum honeycomb core from having a passivation blind area, and effectively making the thickness of the passivation layer of the aluminum honeycomb core uniform, thereby effectively improving the passivation quality of the aluminum honeycomb core.

[0030] 2. In the present invention, by setting the first drainage holes and the second drainage holes to be arranged linearly with equal spacing, they can adapt to the holes on the aluminum honeycomb core, so that the water used to flush the aluminum honeycomb core can quickly flow out through the first drainage hole group, which is convenient for rapid flushing of the aluminum honeycomb core, is beneficial to improving the passivation efficiency of the aluminum honeycomb core, and shortening the passivation period of the aluminum honeycomb core. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a process structure diagram of the passivation device of the present invention;

[0032] Figure 2 is an enlarged view of the second drainage channel of the present invention;

[0033] Figure 3It is a three-dimensional structural diagram of the upper passivation portion of the present invention;

[0034] Figure 4 This is a connection module diagram of the microprocessor of the present invention.

[0035] In the figure: 1. Liquid inlet and outlet channel; 101. First channel; 102. First ball valve; 103. First lift pump; 104. First flowmeter; 105. First drainage channel; 106. Third ball valve; 107. First discharge pipe; 108. Second ball valve; 2. Second drainage channel; 201. Drain pipe; 202. Water valve; 203. Water pressure gauge; 204. Water outlet; 3. Upper passivation portion; 301. First drainage hole group; 302. Second drainage hole group; 303. Clamping slot; 304. Diversion groove; 305. First chamber; 306. Second chamber; 4. Movable plate; 5. Lower passivation part; 501. Positioning shaft; 502. Multi-porous lifting plate; 503. Servo; 504. Rotating block; 505. Angle sensor; 506. Lower passivation chamber; 6. Pure water inlet channel; 601. Second channel; 602. Pure water discharge channel; 603. Diversion channel; 604. Second flow meter; 605. Second lifting pump; 606. Fifth ball valve; 607. Third flow meter; 608. Third lifting pump; 609. Fourth ball valve; 610. Connecting channel; 7. First thermometer; 8. Second thermometer; 9. Collection tank. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0037] Example:

[0038] See also Figure 1-Figure 3 In an embodiment of the present invention, the present invention provides an aluminum honeycomb core passivation device, comprising a liquid inlet and outlet channel 1, an upper passivation part 3, a lower passivation part 5 and a pure water inlet channel 6, wherein the liquid inlet and outlet channel 1 serves as a delivery channel for a polishing agent or a passivating agent;

[0039] The inner wall of the upper passivation part 3 is movably penetrated and clamped with a movable plate 4, which divides the interior of the upper passivation part 3 into a first chamber 305 and a second chamber 306. The first chamber 305 is located above the movable plate 4 and is used for cleaning the aluminum honeycomb core.

[0040] The top of the lower passivation part 5 is connected to the upper passivation part 3. The upper passivation part 3 serves as a reaction chamber for the primary passivation of the aluminum honeycomb core, and the lower passivation part 5 serves as a reaction chamber for the secondary passivation of the aluminum honeycomb core.

[0041] The lower passivation part 5 includes a lower passivation chamber 506, a positioning shaft 501 connected to the connection between the lower passivation chamber 506 and the upper passivation part 3, a porous lifting plate 502 passing through the positioning shaft 501, and a steering gear 503. The output end of the steering gear 503 is connected to a rotating block 504. The rotating block 504 is used to support the bottom of the porous lifting plate 502 so that the porous lifting plate 502 is placed in a horizontal direction.

[0042] The pure water inlet channel 6 is connected to the liquid agent inlet and outlet channel 1, and the pure water inlet channel 6 transports pure water to the passivation device to rinse the surface of the aluminum honeycomb core.

[0043] Preferably, the liquid inlet and outlet channel 1 includes a first channel 101 and a first ball valve 102 installed on the first channel 101. One end of the first channel 101 is connected to a first discharge pipe 107. The surface of the first discharge pipe 107 is penetrated by a second ball valve 108. The first discharge pipe 107 penetrates the lower passivation chamber 506 and discharges the liquid into the lower passivation chamber 506. The second ball valve 108 is used to control the on-off of the liquid in the first discharge pipe 107. The first ball valve 102 is used to control the on-off of the liquid in the first channel 101. One end of the first channel 101 serves as the liquid inlet and outlet end. The first channel 101 is connected to an external liquid source through the liquid inlet and outlet end. A first lift pump 103 is installed on the surface of the first channel 101. The first lift pump 103 is used to draw the liquid in the external liquid source into the first channel 101.

[0044] Preferably, see Figure 1 、 Figure 2 and Figure 3 A collecting tank 9 is welded to the bottom of the lower passivation part 5, and the collecting tank 9 surrounds the outer wall of the lower passivation bin 506. A "U"-shaped cavity is formed between the inner wall of the collecting tank 9 and the outer wall of the lower passivation bin 506, which can be used to load liquid for cleaning the aluminum honeycomb core. The surface of the first channel 101 is connected to a first drainage channel 105 that runs through the collecting tank 9. A third ball valve 106 is installed on the surface of the first drainage channel 105. The surface of the liquid inlet and outlet channel 1 is connected to the second drainage channel 2. The second drainage channel 2 includes a drain pipe 201 connected to the first channel 101. The surface of the drain pipe 201 is connected to a water valve 202. The water valve 202 is used to control the on and off of the water flow in the drain pipe 201. One end of the drain pipe 201 is connected to a water pressure gauge 203, and one end of the water pressure gauge 203 is connected to the water outlet end 204.

[0045] Preferably, see Figure 1 and Figure 3The inner wall of the first chamber 305 is provided with a first drainage hole group 301 and a second drainage hole group 302. The opening of the first drainage hole group 301 is connected to a guide groove 304. By setting the guide groove 304 for drainage, the water used to clean the aluminum honeycomb core in the first chamber 305 can be drained, so as to facilitate the centralized collection of the cleaned water. The first drainage hole group 301 includes a plurality of first drainage holes, and the second drainage hole group 302 includes a plurality of second drainage holes. The first drainage holes and the second drainage holes are arranged linearly with equal spacing to adapt to the holes on the aluminum honeycomb core. When the aluminum honeycomb core is being flushed, the flushing water fills the holes on the aluminum honeycomb core. When overflowing, the flushing water can quickly flow out through the first drainage hole group 301, which is convenient for the rapid flushing of the aluminum honeycomb core, which is beneficial to improving the passivation efficiency of the aluminum honeycomb core and shortening the passivation period of the aluminum honeycomb core. The diameter of the first drainage hole is at least twice the diameter of the second drainage hole. The inner wall of the first chamber 305 is provided with a card groove 303 adapted to the movable plate 4. By setting the first drainage hole with a larger diameter than the second drainage hole, the water in the first chamber 305 can be quickly discharged when the amount of cleaning water is large, thereby preventing the water in the first chamber 305 from gathering and preventing impurities after flushing from re-attaching to the surface of the aluminum honeycomb core.

[0046] Preferably, the porous lifting plate 502 includes a flat plate and a perforation formed on the top of the flat plate. The perforation is used for the liquid discharged through the first discharge pipe 107. The liquid enters the second chamber 306 through the perforation, so that the aluminum honeycomb core can undergo a passivation reaction or a liquid polishing reaction in the second chamber 306. The porous lifting plate 502 is used as a supporting structure for the aluminum honeycomb core in the second chamber 306. When the porous lifting plate 502 rotates to a horizontal direction with the center of the positioning shaft 501, the servo 503 is started, and the output end of the servo 503 drives the rotating block 504 to rotate in a horizontal direction. The rotating block 504 rotates to the bottom of the porous lifting plate 502, which can maintain the horizontal placement of the porous lifting plate 502. There are several servos 503, which simultaneously apply a supporting force to the bottom of the porous lifting plate 502 through the rotating block 504, so as to maintain the reliable support of the porous lifting plate 502 to the aluminum honeycomb core.

[0047] Preferably, the pure water inlet channel 6 includes a second channel 601, the second channel 601 is a three-way pipe, the second channel 601 is connected to a second lifting pump 605, the second channel 601 is connected to the first channel 101 with a connecting channel 610, one end of the second channel 601 is connected to a pure water discharge channel 602, the discharge port of the pure water discharge channel 602 is opposite to the top opening of the passivation part 3, and a fifth ball valve 606 is installed on the channel of the pure water discharge channel 602. The pure water discharge channel 602 and the connecting channel 610 are used to divert the pure water flow in the second channel 601, and the second channel 601 diverts the pure water to the pure water discharge channel 602 and the connecting channel 610.

[0048] Preferably, the connecting channel 610 is connected to the diverter channel 603, to which the third lift pump 608 and the fourth ball valve 609 are connected. One end of the diverter channel 603 passes through the second chamber 306, and one end of the diverter channel 603 passes through the second chamber 306 for discharging pure water, passivation liquid, or polishing liquid into the second chamber 306.

[0049] Preferably, a first flowmeter 104 is installed on the channel between the first discharge pipe 107 and the connecting channel 610, a second flowmeter 604 is connected to the surface of the second channel 601, and a third flowmeter 607 is installed on the surface of the diversion channel 603. The first flowmeter 104 is used to detect the liquid flow flowing into the first discharge pipe 107, the second flowmeter 604 is used to detect the liquid flow flowing through the pure water discharge channel 602, and the third flowmeter 607 is used to detect the liquid flow flowing through the diversion channel 603.

[0050] Preferably, an angle sensor 505 is installed on the surface of the rotating block 504, and the angle sensor 505 is used to detect the rotation angle of the output end of the servo 503 by detecting the rotating block 504. The output end of the angle sensor 505 is electrically connected to the microprocessor, and the output end of the microprocessor is electrically connected to the first flowmeter 104, the second flowmeter 604, the third flowmeter 607 and the power module. The output end of the microprocessor is electrically connected to the display module and the alarm module. A first thermometer 7 is installed on the side wall of the second chamber 306, and the first thermometer 7 is used to detect the temperature of the liquid in the second chamber 306. A second thermometer 8 is installed on the side wall of the lower passivation tank 506, and the second thermometer 8 is used to detect the temperature of the liquid in the lower passivation tank 506.

[0051] The present invention also provides an aluminum honeycomb core passivation method, which is applied to the aluminum honeycomb core passivation device as described above.

[0052] include:

[0053] S1: Rotate the porous lifting plate 502 along the center of the positioning axis 501 so that the porous lifting plate 502 is arranged in a horizontal direction and serves as a partition between the second chamber 306 and the lower passivation chamber 506;

[0054] S2: Start the steering gear 503. The output end of the steering gear 503 drives the rotating block 504 to rotate. The angle sensor 505 collects the angle data signal of the rotating block 504 and sends the angle data signal to the microprocessor. The microprocessor sends a stop signal to the steering gear 503 to stop the output end of the steering gear 503.

[0055] S3: Place the aluminum honeycomb core onto the porous lifting plate 502 through the second chamber 306, open the second ball valve 108 and the fourth ball valve 609, and close the third ball valve 106 and the fifth ball valve 606;

[0056] S4: Connect one end of the first channel 101 to the liquid source, start the first lift pump 103, and introduce 35g / l to 70g / l of trivalent chromium salt solution into the first channel 101 until the trivalent chromium salt solution submerges the aluminum honeycomb core. The reaction time is 2 minutes to 5 minutes.

[0057] S5: The microprocessor sends a start signal to the steering gear 503, and the output end of the steering gear 503 drives the rotating block 504 to rotate away from the porous lifting plate 502. During the downward rotation of the porous lifting plate 502, the aluminum honeycomb core leaves the contact position of the porous lifting plate 502 under the action of gravity and enters the lower passivation chamber 506, so that the blind area where the surface of the aluminum honeycomb core contacts the movable plate 4 is passivated, and the passivation time is 1 minute to 5 minutes. By providing a structure that can move the aluminum honeycomb core during the passivation process, the blind area where the aluminum honeycomb core contacts the porous lifting plate 502 can be passivated, thereby preventing the aluminum honeycomb core from having a passivation blind area, which is conducive to improving the passivation quality of the aluminum honeycomb core.

[0058] S6: Take out the aluminum honeycomb core, push the movable plate 4 along the slot 303, so that the movable plate 4 is completely engaged with the slot 303, and place the aluminum honeycomb core on top of the movable plate 4;

[0059] S7: Close the second ball valve 108 and the fourth ball valve 609, open the third ball valve 106 and the fifth ball valve 606, start the second lift pump 605, let pure water flow into the second channel 601, and discharge the pure water into the interior of the upper passivation part 3 through the pure water discharge channel 602 to rinse the trivalent chromium salt solution remaining on the surface of the aluminum honeycomb core.

[0060] Preferably, the method for flushing the trivalent chromium salt aqueous solution remaining on the surface of the aluminum honeycomb core includes: the water for flushing the aluminum honeycomb core flows out of the upper passivation part 3 through the first drainage hole group 301 and the second drainage hole group 302, and flows into the collection tank 9, and the cleaned water is collected by the collection tank 9. When the water in the collection tank 9 is discharged, the second ball valve 108, the fourth ball valve 609 and the fifth ball valve 606 are closed, and the second ball valve 108 and the water valve 202 are opened to discharge the water in the collection tank 9 through the first channel 101 to the water outlet end 204.

[0061] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An aluminum honeycomb core passivation device, characterized in that: include: A liquid inlet and outlet channel, which serves as a delivery channel for a polishing agent or a passivating agent; An upper passivation part, wherein the inner wall of the upper passivation part is movably penetrated and clamped with a movable plate, the movable plate divides the interior of the upper passivation part into a first chamber and a second chamber, the first chamber is located above the movable plate and is used for cleaning the aluminum honeycomb core; A lower passivation part, wherein the top end of the lower passivation part is connected to the upper passivation part, the second chamber serves as a reaction chamber for the primary passivation of the aluminum honeycomb core, and the lower passivation part serves as a reaction chamber for the secondary passivation of the aluminum honeycomb core; The lower passivation part includes a lower passivation chamber, a positioning shaft connected to the connection between the lower passivation chamber and the upper passivation part, a porous lifting plate passing through the positioning shaft, and a steering gear. The output end of the steering gear is connected to a rotating block, which is used to support the bottom of the porous lifting plate so that the porous lifting plate is placed in a horizontal direction. A pure water inlet channel is connected to the liquid inlet and outlet channel, and the pure water inlet channel transports pure water to the passivation device to rinse the surface of the aluminum honeycomb core. The pure water inlet channel includes a second channel, and the second channel is a three-way pipe. The second channel is connected to a second lifting pump, and a connecting channel is connected between the second channel and the first channel. One end of the second channel is connected to a pure water discharge channel, and a fifth ball valve is installed on the pure water discharge channel. The connecting channel is connected to a diversion channel, and the diversion channel is connected to a third lifting pump and a fourth ball valve. One end of the diversion channel passes through the second chamber.

2. The aluminum honeycomb core passivation device according to claim 1, characterized in that: The liquid inlet and outlet channel includes a first channel and a first ball valve installed on the first channel. One end of the first channel is connected to a first discharge pipe. The surface of the first discharge pipe is penetrated by a second ball valve. A first lift pump is installed on the surface of the first channel.

3. The aluminum honeycomb core passivation device according to claim 2, characterized in that: A collecting tank is welded to the bottom of the lower passivation part, the surface of the first channel is connected to the first drainage channel that runs through the collecting tank, a third ball valve is installed on the surface of the first drainage channel, the surface of the liquid inlet and outlet channel is connected to the second drainage channel, the second drainage channel includes a drain pipe connected to the first channel, the surface of the drain pipe is connected to a water valve, the water valve is used to control the on and off of the water flow in the drain pipe, one end of the drain pipe is connected to a water pressure gauge, and one end of the water pressure gauge is connected to the water outlet.

4. The aluminum honeycomb core passivation device according to claim 3, characterized in that: The inner wall of the first chamber is provided with a first drainage hole group and a second drainage hole group, the opening of the first drainage hole group is connected to a guide groove, the first drainage hole group includes a plurality of first drainage holes, the second drainage hole group includes a plurality of second drainage holes, the diameter of the first drainage hole is at least twice the diameter of the second drainage hole, and the inner wall of the first chamber is provided with a card slot adapted to the movable plate.

5. The aluminum honeycomb core passivation device according to claim 4, characterized in that: The porous lifting plate includes a flat plate and through-holes formed on the top of the flat plate. The porous lifting plate is used as a supporting structure for the aluminum honeycomb core in the second cavity.

6. The aluminum honeycomb core passivation device according to claim 5, characterized in that: A first flow meter is installed on the channel between the first discharge pipe and the connecting channel, a second flow meter is connected to the surface of the second channel, and a third flow meter is installed on the surface of the diversion channel.

7. The aluminum honeycomb core passivation device according to claim 6, characterized in that: An angle sensor is installed on the surface of the rotating block, the output end of the angle sensor is electrically connected to the microprocessor, the output end of the microprocessor is electrically connected to the first flowmeter, the second flowmeter, the third flowmeter and the power module, the output end of the microprocessor is electrically connected to the display module and the alarm module, a first thermometer is installed on the side wall of the second chamber, the first thermometer is used to detect the temperature of the liquid in the second chamber, and a second thermometer is installed on the side wall of the lower passivation bin, the second thermometer is used to detect the temperature of the liquid in the lower passivation bin.

8. A passivation method for an aluminum honeycomb core, characterized in that: Applicable to the aluminum honeycomb core passivation device according to any one of claims 1 to 7, the aluminum honeycomb core passivation method comprises: Rotate the porous lifting plate along the center of the positioning axis so that the porous lifting plate is arranged in a horizontal direction and serves as a partition between the second chamber and the lower passivation chamber; The servo is started, and the output end of the servo drives the rotating block to rotate. The angle sensor collects the angle data signal of the rotating block and sends the angle data signal to the microprocessor. The microprocessor sends a stop signal to the servo to stop the output end of the servo; Place the aluminum honeycomb core onto the porous lifting plate through the second chamber, open the second ball valve and the fourth ball valve, and close the third ball valve and the fifth ball valve; Connect one end of the first channel to the liquid source, start the first lift pump, and introduce 35g / l to 70g / l of trivalent chromium salt aqueous solution into the first channel until the trivalent chromium salt aqueous solution submerges the aluminum honeycomb core. The reaction time is 2 minutes to 5 minutes. The microprocessor sends a start signal to the servo, and the output end of the servo drives the rotating block to rotate away from the porous lifting plate. During the downward rotation of the porous lifting plate, the aluminum honeycomb core leaves the contact position of the porous lifting plate under the action of gravity and enters the lower passivation chamber, so that the blind area where the surface of the aluminum honeycomb core contacts the movable plate is passivated; Take out the aluminum honeycomb core, push the movable plate along the slot to make the movable plate fully engage with the slot, and place the aluminum honeycomb core on top of the movable plate; Close the second ball valve and the fourth ball valve, open the third ball valve and the fifth ball valve, start the second lift pump, let pure water flow into the second channel, and discharge the pure water into the interior of the upper passivation part through the pure water discharge channel to rinse the trivalent chromium salt solution remaining on the surface of the aluminum honeycomb core.

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