A Dacromet coating passivation device and control method thereof

Abstract

The present invention relates to the technical field of metal parts processing, in particular to a Dacromet coating passivation device and a control method thereof, which also includes: the passivation cylinder includes a dipping chamber, a transition chamber and a storage chamber; a mesh box is installed above the passivation cylinder through a driving component to drive the passivation cylinder to perform vertical movement adjustment, and the driving component also includes a rotating mechanism for driving the passivation cylinder to rotate; a solution surge component is installed inside the passivation cylinder and is used to drive the Dacromet liquid to surge slowly along a trajectory from the storage chamber to the dipping chamber and then to the transition chamber to form a flow replacement of the Dacromet liquid; this device, through the arrangement of the solution surge component, enables the Dacromet liquid inside the dipping chamber to form a slow surge while keeping the amount unchanged, so that the Dacromet liquid forms a dynamic flow, which is beneficial to improving the coating effect on the workpiece.

Description

Technical Field

[0001] The invention relates to the field of metal parts processing, and in particular to a Dacromet coating passivation device and a control method thereof. Background Art

[0002] Dacromet coating is a high-performance anti-corrosion coating technology. The main components of Dacromet coating include metal powder (zinc and aluminum powder), solvent (such as ethylene glycol), passivator (mainly chromate) and special organic matter (such as cellulose powder). The protective effect of the coating on the steel substrate is mainly reflected in the barrier effect, passivation effect and cathodic protection effect.

[0003] During the Dacromet coating process, the clean workpiece is evenly coated with Dacromet coating by dipping, spraying or brushing. When the workpiece is coated by dipping, multiple workpieces are usually coated at one time. However, as the coating proceeds, the concentration of the Dacromet liquid gradually decreases as the reaction proceeds, which makes the control of the coating thickness inaccurate and affects the coating efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a Dacromet coating passivation device and a control method thereof.

[0005] In a first aspect, the present invention provides a Dacromet coating passivation device, comprising a passivation cylinder, and further comprising:

[0006] The passivation cylinder comprises a dipping chamber, a transition chamber and a storage chamber;

[0007] A mesh box is installed above the passivation cylinder through a driving assembly to drive the passivation cylinder to perform vertical movement adjustment, and the driving assembly also includes a rotating mechanism for driving the passivation cylinder to rotate;

[0008] A solution surge assembly is installed inside the passivation cylinder and is used to drive the Dacromet solution to surge slowly along a trajectory from the storage chamber to the dipping chamber and then to the transition chamber, so as to form a flow replacement of the Dacromet solution;

[0009] A control unit, used for controlling the solution surging component to start driving the Dacromet solution to surge after the mesh box enters the dipping chamber, and controlling the solution surging component to drive the Dacromet solution from the dipping chamber to the interior of the transition chamber after the dipping is completed, so that a centrifugal cavity is formed inside the dipping chamber;

[0010] The operator places the cleaned workpiece that needs to be coated inside the mesh box, and then the control unit controls the driving component to start. After the driving component is started, the mesh box is driven to move downward. After the mesh box moves downward, it gradually enters the interior of the dipping chamber. The interior of the dipping chamber contains Dacromet liquid. After the mesh box completely enters the interior of the dipping chamber, the workpiece inside the mesh box is completely immersed in the Dacromet liquid. Then the control unit controls the solution surge component to start. After the solution surge component is started, it drives the Dacromet liquid to gradually surge from the interior of the storage chamber to the interior of the dipping chamber, and at the same time drives the Dacromet liquid in the dipping chamber to slowly flow to the interior of the transition chamber, so that the Dacromet liquid in the dipping chamber forms a slow surge while keeping the amount unchanged, so that the Dacromet liquid forms a dynamic flow, which is conducive to avoiding the situation that the Dacromet liquid around the workpiece is in a static state and the concentration decreases as the reaction gradually proceeds, thereby resulting in a reduced coating effect on the workpiece, thereby helping to improve the coating effect on the workpiece;

[0011] The amount of Dacromet liquid in the dipping chamber is kept constant, which helps to avoid the situation where the total amount of Dacromet liquid in the storage chamber increases as the Dacromet liquid surges from the storage chamber to the inside of the dipping chamber, thereby causing hydraulic and gas pressure effects to form inside the storage chamber, interfering with the coating pressure of the workpiece, thereby affecting the final coating effect, which helps to maintain the coating effect on the workpiece;

[0012] The setting of the transition chamber allows the surging Dacromet liquid to be stored inside the transition chamber, so that the Dacromet liquid with reduced concentration can be temporarily stored inside the transition chamber. The operator can detect the concentration of the Dacromet liquid inside the transition chamber and intervene to adjust it. By adding substances, the concentration of the Dacromet liquid inside the transition chamber is restored to a normal level, and then the restored Dacromet liquid is transported to the storage chamber for storage, so as to keep the concentration of the Dacromet liquid inside the storage chamber stable at a normal coating concentration when coating is performed next time, which is beneficial to improving the coating effect on the workpiece.

[0013] Preferably, the solution surging component comprises:

[0014] A first connecting pipe is fixed inside the storage chamber, the top of the first connecting pipe passes through the top of the storage chamber and then extends to the inside of the dipping chamber, a plurality of first openings are opened at the bottom of the first connecting pipe, and a first one-way valve is installed inside the first connecting pipe;

[0015] a second connecting pipe fixed inside the storage chamber, the top of the second connecting pipe passing through the top of the storage chamber and then extending to the inside of the transition chamber, a plurality of second openings being opened at the bottom of the second connecting pipe, and a third one-way valve being installed inside the second connecting pipe;

[0016] An air pressure control assembly installed inside the storage chamber, used to control the air pressure inside the storage chamber, so as to drive the Dacromet liquid from the storage chamber into the dipping chamber or from the transition chamber into the storage chamber through the air pressure change inside the storage chamber;

[0017] A negative pressure driving component is installed inside the transition chamber and is used to control the Dacromet liquid to enter the transition chamber from the dipping chamber under the action of negative pressure;

[0018] Due to the arrangement of the first one-way valve inside the first connecting pipe, the Dacromet liquid can only flow from the storage chamber to the dipping chamber, and due to the arrangement of the third one-way valve inside the second connecting pipe, the Dacromet liquid can only flow from the transition chamber to the storage chamber.

[0019] When the air pressure control component starts to deliver air to the inside of the storage chamber, the internal air pressure of the storage chamber increases, so that under the action of the air pressure, the Dacromet liquid is pushed to flow into the inside of the dipping chamber along the first connecting pipe after passing through the first opening, and the speed of the air flow delivered inside the storage chamber of the control box is controlled to control the surging speed of the Dacromet liquid, so that the Dacromet liquid is surging and replaced into the dipping chamber;

[0020] When the negative pressure driving component starts to extract the internal gas of the transition chamber, a negative pressure is formed inside the transition chamber. Under the action of the negative pressure, the Dacromet liquid inside the dipping chamber flows along the pipeline of the negative pressure driving component to the inside of the transition chamber, thereby realizing equal discharge of the Dacromet liquid inside the dipping chamber to maintain the stability of the amount of Dacromet liquid inside the dipping chamber. After coating, the Dacromet liquid inside the dipping chamber can be controlled to flow to the inside of the transition chamber to empty the centrifugal space inside the dipping chamber, so that the mesh box can drive the workpiece to be centrifuged inside the dipping chamber after coating, so that the Dacromet liquid thrown out by the centrifugation remains inside the dipping chamber, which is conducive to avoiding the waste of Dacromet liquid due to the transfer of the workpiece, thereby helping to improve the utilization rate of the Dacromet liquid;

[0021] After the concentration of the Dacromet liquid inside the transition chamber is adjusted to restore the normal coating level, the control unit controls the air pressure control component to start extracting the gas inside the storage chamber, so that a negative pressure is formed inside the storage chamber. Under the action of the negative pressure, the Dacromet liquid inside the transition chamber flows along the second connecting pipe and is transported to the inside of the storage chamber through the second opening, so that the Dacromet liquid is reset to enable the next coating operation, which is beneficial to maintaining the coating effect on the workpiece.

[0022] Preferably, the negative pressure driving component comprises:

[0023] A third air pump is fixed on the outer wall of the passivation cylinder and is connected to the interior of the transition chamber through an input end, so as to extract the gas inside the transition chamber;

[0024] A recovery pipe, consisting of a hard pipe end and a telescopic hose end that are interconnected, wherein the hard pipe end is located inside the transition chamber, the telescopic hose end is located inside the dipping chamber, and the lowest end of the telescopic hose end is connected to a gravity block;

[0025] A pulling wire, one end of which is fixed to the bottom end of the telescopic hose end, and the other end of which passes through the telescopic hose end and the hard tube end in sequence and then passes through the side wall of the passivation cylinder and extends out;

[0026] A fourth motor is fixed to the top of the passivation cylinder, a winding roller is fixed to the end of the output shaft of the fourth motor, and the other end of the pulling line is wound around the winding roller;

[0027] After the fourth motor is started, it can drive the winding roller to rotate. After the winding roller rotates, the pulling line is wound or unwound, thereby adjusting the remaining free length of the pulling line. By adjusting the length of the pulling line, the bottom of the telescopic hose end connected to the end of the pulling line is adjusted. The telescopic hose end is kept in a hanging state under the action of the gravity block, thereby adjusting the height of the bottom of the telescopic hose end. By adjusting the height of the bottom of the telescopic hose end, the height of the remaining liquid level inside the dipping chamber is adjusted, thereby being able to adjust and control the remaining amount of Dacromet liquid inside the dipping chamber;

[0028] After the third air pump is started, the gas inside the transition chamber can be extracted, thereby adjusting the air pressure inside the transition chamber, so that a negative pressure state is formed inside the transition chamber. Under the action of the negative pressure, the Dacromet liquid is driven to flow from the inside of the dipping chamber to the inside of the transition chamber, thereby realizing the transfer of the Dacromet liquid.

[0029] In a second aspect, a control method for a Dacromet coating passivation device is provided, wherein a gravity sensor is installed at the top connection of the mesh box, and the control unit includes a user end. The control method includes the following steps:

[0030] The control unit acquires gravity information M from the gravity sensor;

[0031] The control unit obtains the proportion information x and the single part weight m and segment information Q from the user end, wherein the segment information Q includes the surging speed v corresponding to each data segment;

[0032] The control unit substitutes the gravity information M, the ratio information x, and the single part weight m into A=x(M / m 2 ) to obtain the judgment coefficient A;

[0033] The control unit selects a corresponding surge speed v according to the segment information Q corresponding to the judgment coefficient A;

[0034] The control unit sends the surging speed v to the solution surging component;

[0035] The gravity sensor can detect the weight of the workpiece inside the mesh box to form gravity information M about the weight of the workpiece, and send the gravity information M to the control unit so that the control unit acquires the gravity information M;

[0036] The operator can input the proportion information x, the single part weight m, and the segmentation information Q from the user end. The proportion information x is the proportion coefficient, which is determined by the operator according to the coating thickness of the workpiece as needed. The larger the proportion information x is, the greater the coating thickness of the workpiece is required. The single part weight m is the weight of a workpiece, which is input by the operator according to the measured weight of the single part. The segmentation information Q is to segment the range of the judgment coefficient A. Since the number of workpieces that can be contained in the mesh box is limited, the range of the segmentation information Q has an upper limit and can be set as needed. Each range segment of the segmentation information Q corresponds to a surge speed v, so that different surge speeds v are adjusted according to different ranges of the segmentation information Q corresponding to the judgment coefficient A;

[0037] It should be noted that the ratio information x and the segment information Q are both variable information, which are selected by the operator according to actual operation needs;

[0038] The M / m in x (M / m) can calculate the number of workpieces through the weight m of a single part and the gravity information M, so that the surge speed v can be increased when the number of workpieces is large. When the number of workpieces is large, the reaction range is large, which increases the consumption. At this time, increasing the surge replacement speed of the Dacromet liquid is conducive to the normal coating.

[0039] The setting of m in x (M / m) makes it possible that when the volume of a single workpiece is large, the surface area of ​​the workpiece inside the mesh box to be coated will be reduced under the same gravity information M, because the large volume of the single workpiece will lead to a reduction in the surface area of ​​the workpiece to be coated under the same gravity information M, resulting in different surface areas to be coated when the volume of a single workpiece is large under the same number of workpieces. At this time, the weight of a single part m is used as the denominator for calculation, so that under the same gravity information M, the judgment coefficient A obtained when the volume of a single workpiece is large is smaller, in accordance with the trend that the surface area to be coated is smaller when the volume of a single workpiece is large under the same number of workpieces, thereby facilitating the distinction of workpieces with different single volumes under the same number of workpieces;

[0040] After the control unit obtains the judgment coefficient A, the judgment coefficient A is compared with the range of the segment information Q to adjust and control the surging speed of the Dacromet liquid;

[0041] It should be noted that the surge velocity v is the liquid flow velocity of the Dacromet liquid through the first connecting pipe, and the unit is cm / s;

[0042] In summary, by adjusting the surge speed of the Dacromet liquid according to the number of workpieces and the weight of a single workpiece, the surge speed of the Dacromet liquid can be increased when the surface to be coated increases, which is beneficial to increase the surge speed and replace the Dacromet liquid in time when the amount of Dacromet liquid consumed in the reaction increases, thereby helping to improve the coating effect on the workpiece.

[0043] Preferably, the driving assembly includes an infrared sensor and further includes:

[0044] The control unit obtains height information h1 from the infrared sensor;

[0045] The control unit obtains the liquid level difference h0 from the user end;

[0046] The control unit substitutes H=h1+h0 according to the height information h and the liquid level difference h0 to obtain the liquid level control height H, and generates liquid discharge control information, the liquid discharge control information includes the control height H, and the liquid discharge control information is used to control the fourth motor to start so as to control the end height of the recovery pipe to be the control height H;

[0047] The control unit sends the discharge control information to the fourth motor to control the fourth motor to start adjusting the end height of the recovery pipe to a control height H;

[0048] The infrared sensor can detect the stacking height of the workpieces inside the mesh box and generate height information h1. The infrared sensor then sends the height information h1 to the control unit, so that the control unit obtains the height information h1. After obtaining the height information h1, the control unit generates drainage control information according to the height information h1.

[0049] Then the control unit sends the discharge control information to the fourth motor to control the fourth motor to start adjusting the end height of the recovery pipe;

[0050] It should be noted that the above-mentioned height information h1 is the distance between the highest point of the workpiece and the bottom of the mesh box, and the control height H is the distance between the liquid surface and the bottom of the dipping chamber after the mesh box is attached to the bottom of the dipping chamber;

[0051] In summary, by controlling the height of the liquid level according to the position of the highest point of the workpiece, it is helpful to avoid the situation where the liquid level is too low and the workpiece is not completely immersed, and it is helpful to avoid the situation where the liquid level is too high and the amount of Dacromet liquid in the dipping chamber is too much and waste occurs.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The present invention arranges a solution surge component so that the Dacromet solution inside the dipping chamber forms a slow surge while maintaining a constant amount, thereby forming a dynamic flow of the Dacromet solution, which is beneficial to avoid the situation where the Dacromet solution around the workpiece is in a static state and the concentration decreases as the reaction proceeds, thereby causing a decrease in the coating effect on the workpiece, thereby helping to improve the coating effect on the workpiece.

[0054] 2. The present invention adjusts the surging speed of the Dacromet liquid according to the number of workpieces and the weight of a single workpiece through the setting of a control unit, so that when the surface to be coated increases, the surging speed of the Dacromet liquid can be increased, which is beneficial to increase the surging speed and timely replace the Dacromet liquid when the amount of Dacromet liquid consumed in the reaction increases, thereby helping to improve the coating effect on the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the method flow of the present invention.

[0056] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0057] Figure 3 The structure of the present invention after the overall section is schematically shown. Figure 1 .

[0058] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0059] Figure 5 The structure of the present invention after the overall section is schematically shown. Figure 2 .

[0060] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure at point B in the middle.

[0061] Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure at point C in the middle.

[0062] Figure 8 It is a schematic structural diagram of the cross section of the passivation tube of the present invention.

[0063] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at D in the middle.

[0064] Fig.10 It is a partial structural schematic diagram of the driving assembly of the present invention.

[0065] In the figure: 1, passivation cylinder; 101, dipping chamber; 102, transition chamber; 103, storage chamber; 2, cover plate; 201, threaded sleeve; 202, screw; 203, outer cylinder; 204, rotating shaft; 205, first synchronous wheel; 206, first synchronous belt; 207, second synchronous wheel; 208, first motor; 209, isolation box; 210, partition; 3, mesh box; 301, installation box; 302, electric push rod; 303, rotating plate; 304, second motor; 4, first connecting pipe; 401, first opening; 402, first one-way valve; 5, first air pump; 501, air inlet pipe; 502, exhaust pipe; 5 03, cylindrical box; 504, rotating block; 505, third motor; 506, port; 507, external interface; 508, first connecting pipe; 509, second connecting pipe; 510, second one-way valve; 511, round hole; 6, second connecting pipe; 601, second opening; 602, third one-way valve; 7, recovery pipe; 701, pulling line; 702, fourth motor; 703, winding roller; 8, drying box; 801, fifth motor; 802, third synchronous wheel; 803, second synchronous belt; 804, rotating sleeve; 9, drying tube; 901, second air pump; 902, third connecting pipe; 10, third air pump. DETAILED DESCRIPTION

[0066] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0067] like Figures 2 to 10 A Dacromet coating passivation device shown includes a passivation cylinder 1 and further includes:

[0068] The passivation cylinder 1 includes a dipping chamber 101, a transition chamber 102 and a storage chamber 103;

[0069] The mesh box 3 is installed above the passivation cylinder 1 through a driving assembly to drive the passivation cylinder 1 to move and adjust vertically. The driving assembly also includes a rotating mechanism for driving the passivation cylinder 1 to rotate;

[0070] The solution surge assembly is installed inside the passivation cylinder 1 and is used to drive the Dacromet solution to surge slowly along the trajectory from the storage chamber 103 to the dipping chamber 101 and then to the transition chamber 102, so as to form a flow replacement of the Dacromet solution;

[0071] A control unit, which is used to control the solution surging component to start driving the Dacromet solution to surge after the mesh box 3 enters the interior of the dipping chamber 101, and to control the solution surging component to drive the Dacromet solution from the dipping chamber 101 to the interior of the transition chamber 102 after the dipping is completed, so that a centrifugal cavity is formed inside the dipping chamber 101;

[0072] During the Dacromet coating process, the clean workpiece is evenly coated with Dacromet coating by dipping, spraying or brushing. When the workpiece is coated by dipping, multiple workpieces are usually coated at one time. However, as the coating proceeds, the concentration of the Dacromet liquid gradually decreases as the reaction proceeds, which makes the control of the coating thickness inaccurate and affects the coating efficiency.

[0073] This embodiment of the present invention can solve the above problems. The specific implementation method is as follows: the operator places the cleaned workpiece that needs to be coated inside the mesh box 3, and then the control unit controls the drive component to start. After the drive component is started, the mesh box 3 is driven to move downward. After the mesh box 3 moves downward, it gradually enters the interior of the dipping chamber 101. The interior of the dipping chamber 101 contains Dacromet solution. After the mesh box 3 completely enters the interior of the dipping chamber 101, the workpiece inside the mesh box 3 is completely immersed in the interior of the Dacromet solution. Then the control unit controls the solution surging component to start, and the solution After the surge component is started, it drives the Dacromet liquid to surge gradually from the inside of the storage chamber 103 to the inside of the dipping chamber 101, and at the same time drives the Dacromet liquid in the dipping chamber 101 to flow slowly to the inside of the transition chamber 102, so that the Dacromet liquid in the dipping chamber 101 forms a slow surge while keeping the amount unchanged, so that the Dacromet liquid forms a dynamic flow, which is beneficial to avoid the situation where the Dacromet liquid around the workpiece is in a static state and the concentration decreases as the reaction gradually proceeds, thereby resulting in a decrease in the coating effect on the workpiece, thereby helping to improve the coating effect on the workpiece;

[0074] The amount of Dacromet liquid in the dipping chamber 101 remains unchanged, which helps to avoid the situation where the total amount of Dacromet liquid in the storage chamber 103 increases as the Dacromet liquid surges from the storage chamber 103 to the inside of the dipping chamber 101, thereby causing hydraulic and gas pressure effects to form inside the storage chamber 103, interfering with the coating pressure of the workpiece, thereby affecting the final coating effect, which helps to maintain the coating effect on the workpiece;

[0075] The setting of the transition chamber 102 allows the surging Dacromet liquid to be stored inside the transition chamber 102, so that the Dacromet liquid with reduced concentration can be temporarily stored inside the transition chamber 102. The operator can detect the concentration of the Dacromet liquid inside the transition chamber 102 and intervene to adjust it. By adding substances, the concentration of the Dacromet liquid inside the transition chamber 102 is restored to a normal level, and then the restored Dacromet liquid is transported to the storage chamber 103 for storage, so as to keep the concentration of the Dacromet liquid inside the storage chamber 103 stable at a normal coating concentration when coating is performed next time, which is beneficial to improve the coating effect on the workpiece.

[0076] The rotating mechanism includes:

[0077] The second motor 304 is fixed to the top of the cover plate 2. The output shaft of the second motor 304 passes through the cover plate 2 and is fixed with a rotating plate 303. The rotating plate 303 is rotatably connected to the bottom of the cover plate 2.

[0078] Two installation boxes 301 are symmetrically fixed inside the mesh box 3;

[0079] Two electric push rods 302 are respectively fixed inside the two installation boxes 301. The tops of the telescopic rods of the two electric push rods 302 penetrate the installation boxes 301 and are fixedly connected to the bottom of the rotating plate 303.

[0080] After the second motor 304 is started, the output shaft drives the rotating plate 303 to rotate, and the rotating plate 303 drives the electric push rod 302 to rotate, thereby driving the installation box 301 and the mesh box 3 to rotate, so that the mesh box 3 can drive the workpiece inside to rotate for centrifugal effect, which is beneficial to centrifugally remove excess Dacromet liquid inside the dipping chamber 101, avoiding the situation where the workpiece is taken out and then operated, thereby improving the utilization rate of the Dacromet liquid;

[0081] After the electric push rod 302 is started, the distance between the mesh box 3 and the cover plate 2 is adjusted by extending and retracting the telescopic rod, thereby adjusting the height of the mesh box 3, so that the position of the mesh box 3 inside the dipping chamber 101 can be adjusted, which is conducive to adjusting the appropriate position to facilitate coating.

[0082] As an optional embodiment, the solution surging component includes:

[0083] The first connecting pipe 4 is fixed inside the storage chamber 103. The top of the first connecting pipe 4 passes through the top of the storage chamber 103 and then extends to the inside of the dipping chamber 101. The bottom of the first connecting pipe 4 is provided with a plurality of first openings 401. A first one-way valve 402 is installed inside the first connecting pipe 4.

[0084] The second connecting pipe 6 is fixed inside the storage chamber 103. The top of the second connecting pipe 6 passes through the top of the storage chamber 103 and then extends to the inside of the transition chamber 102. The bottom of the second connecting pipe 6 is provided with a plurality of second openings 601. A third one-way valve 602 is installed inside the second connecting pipe 6.

[0085] An air pressure control component is installed inside the storage chamber 103 and is used to control the air pressure inside the storage chamber 103 so as to drive the Dacromet liquid from the storage chamber 103 into the dipping chamber 101 or from the transition chamber 102 into the storage chamber 103 through the air pressure change inside the storage chamber 103;

[0086] A negative pressure driving assembly is installed inside the transition chamber 102 and is used to control the Dacromet liquid to enter the transition chamber 102 from the dipping chamber 101 under the action of negative pressure;

[0087] Due to the arrangement of the first one-way valve 402 inside the first connecting pipe 4, the Dacromet liquid can only flow along the storage chamber 103 to the dipping chamber 101, and due to the arrangement of the third one-way valve 602 inside the second connecting pipe 6, the Dacromet liquid can only flow along the transition chamber 102 to the storage chamber 103;

[0088] When the air pressure control component starts to deliver air to the interior of the storage chamber 103, the internal air pressure of the storage chamber 103 increases, so that under the action of the air pressure, the Dacromet liquid is pushed to flow through the first opening 401 along the first connecting pipe 4 to the interior of the dipping chamber 101, and the speed of the air flow delivered to the interior of the storage chamber 103 of the control box is controlled to control the surging speed of the Dacromet liquid, so that the Dacromet liquid is surging and replaced to the interior of the dipping chamber 101;

[0089] When the negative pressure driving component starts to extract the internal gas of the transition chamber 102, a negative pressure is formed inside the transition chamber 102. Under the action of the negative pressure, the Dacromet liquid inside the dipping chamber 101 flows along the pipeline of the negative pressure driving component to the inside of the transition chamber 102, thereby realizing the equal discharge of the Dacromet liquid inside the dipping chamber 101 to maintain the stability of the amount of Dacromet liquid inside the dipping chamber 101. After the coating is completed, the Dacromet liquid inside the dipping chamber 101 can be controlled to flow to the inside of the transition chamber 102 to empty the centrifugal space inside the dipping chamber 101, so that the mesh box 3 can drive the workpiece to be centrifuged inside the dipping chamber 101 after coating, so that the Dacromet liquid thrown out by the centrifugation remains inside the dipping chamber 101, which is conducive to avoiding the waste of Dacromet liquid due to the transfer of the workpiece, thereby helping to improve the utilization rate of the Dacromet liquid;

[0090] After the concentration of the Dacromet liquid inside the transition chamber 102 is adjusted to restore the normal coating level, the control unit controls the air pressure control component to start extracting the gas inside the storage chamber 103, so that a negative pressure is formed inside the storage chamber 103. Under the action of the negative pressure, the Dacromet liquid inside the transition chamber 102 flows along the second connecting pipe 6 and is transported to the inside of the storage chamber 103 through the second opening 601, so that the Dacromet liquid is reset to enable the next coating operation, which is beneficial to maintaining the coating effect on the workpiece.

[0091] As an optional embodiment, the negative pressure driving component includes:

[0092] The third air pump 10 is fixed on the outer wall of the passivation cylinder 1 and is connected to the interior of the transition chamber 102 through the input end, so as to extract the gas inside the transition chamber 102;

[0093] The recovery pipe 7 is composed of a hard pipe end and a telescopic hose end which are interconnected. The hard pipe end is located inside the transition chamber 102, and the telescopic hose end is located inside the dipping chamber 101. The lowest end of the telescopic hose end is connected to a gravity block.

[0094] The pulling wire 701 has one end fixed to the bottom end of the telescopic hose end, and the other end passes through the telescopic hose end and the hard tube end in sequence, and then passes through the side wall of the passivation cylinder 1 and extends out;

[0095] The fourth motor 702 is fixed to the top of the passivation cylinder 1. A winding roller 703 is fixed to the end of the output shaft of the fourth motor 702. The other end of the pulling line 701 is wound around the winding roller 703.

[0096] After the fourth motor 702 is started, it can drive the winding roller 703 to rotate. After the winding roller 703 rotates, it reels or unwinds the pulling line 701, so as to adjust the remaining free length of the pulling line 701. By adjusting the length of the pulling line 701, the bottom of the telescopic hose end connected to the end of the pulling line 701 is adjusted. The telescopic hose end is kept in a hanging state under the action of the gravity block, so as to adjust the height of the bottom of the telescopic hose end. By adjusting the height of the bottom of the telescopic hose end, the height of the remaining liquid level inside the dipping chamber 101 is adjusted, so that the remaining amount of Dacromet liquid inside the dipping chamber 101 can be adjusted and controlled;

[0097] After the third air pump 10 is started, it can extract the gas inside the transition chamber 102, thereby adjusting the air pressure inside the transition chamber 102, so that a negative pressure state is formed inside the transition chamber 102, and under the action of the negative pressure, the Dacromet liquid is driven to flow from the inside of the dipping chamber 101 to the inside of the transition chamber 102, thereby realizing the transfer of the Dacromet liquid.

[0098] As an optional embodiment, it also includes:

[0099] The drying box 8 is rotatably mounted on the top of the passivation cylinder 1;

[0100] The turning assembly is installed on the top of the passivation cylinder 1 and is used to drive the spin drying box 8 to turn over;

[0101] A drying tube 9 is fixed to the bottom of the inner wall of the drying box 8;

[0102] The second air pump 901 is fixed on the outer wall of the drying box 8, and the output end of the second air pump 901 is fixedly connected to the drying tube 9 through the third connecting pipe 902 to transport dry air to the interior of the drying tube 9;

[0103] After the flip assembly is started, the spin drying box 8 is driven to flip, so that the spin drying box 8 can flip to the top of the passivation cylinder 1 to spin the workpiece, and can also flip to be separated from the passivation cylinder 1 to make way for the downward movement of the mesh box 3;

[0104] When the spin-drying box 8 flips to the top of the passivation cylinder 1, the driving component drives the mesh box 3 to enter the interior of the spin-drying box 8 and then drives the spin-drying box 8 to rotate. The spin-drying box 8 performs a spin-drying operation on the workpiece during the rotation and centrifugal process. At the same time, the control unit controls the second air pump 901 to start, and delivers a dry airflow to the interior of the drying tube 9 through the third connecting tube 902. The airflow flows along the drying tube 9 to the groove inside the spin-drying box 8, so that the dry airflow flows from the middle of the spin-drying box 8 to the surroundings of the spin-drying box 8 during the rotation of the spin-drying box 8, which is beneficial to promote the drying of the workpiece, thereby facilitating the coating of the workpiece in a dry state, thereby facilitating improving the coating effect on the workpiece.

[0105] The flip assembly includes:

[0106] The fifth motor 801 is fixed on the top of the passivation cylinder 1;

[0107] The rotating sleeve 804 is fixed on the outer wall of the drying box 8 and is rotatably mounted on the top of the passivation cylinder 1;

[0108] Three third synchronous wheels 802, one fixed to the output shaft end of the fifth motor 801, one fixed to the outer wall of the rotating sleeve 804, and one rotatably mounted on the top of the passivation cylinder 1;

[0109] The second synchronous belt 803 is transmission-connected to the outer rings of the three third synchronous wheels 802;

[0110] After the fifth motor 801 is started, it drives the third synchronous wheel 802 connected to it to rotate. The third synchronous wheel 802 drives the other two third synchronous wheels 802 to rotate through the second synchronous belt 803, thereby driving the rotating sleeve 804 to rotate, and then driving the spin dryer box 8 to rotate through the rotating sleeve 804, thereby realizing the flipping adjustment of the spin dryer box 8.

[0111] As an optional embodiment, the air pressure control component includes:

[0112] An isolation box 209 is fixed inside the storage cavity 103 to form an isolated installation space;

[0113] The first air pump 5 is fixed inside the isolation box 209, and the input end and the output end of the first air pump 5 are respectively connected to the intake pipe 501 and the exhaust pipe 502;

[0114] The cylindrical box body 503 has upper and lower ends on one side connected to the exhaust pipe 502 and the intake pipe 501 respectively, and the upper and lower ends on the other side are connected to the first connecting pipe 508 and the second connecting pipe 509 respectively. The ends of the first connecting pipe 508 and the second connecting pipe 509 are connected to the inside of the storage chamber 103 after passing through the isolation box 209. The insides of the first connecting pipe 508 and the second connecting pipe 509 are both installed with a second one-way valve 510;

[0115] The communication adjustment mechanism is installed inside the cylindrical box 503, and is used to connect the air intake pipe 501 to the outside when the exhaust pipe 502 is adjusted to be connected to the first connecting pipe 508, and to connect the exhaust pipe 502 to the outside when the air intake pipe 501 is adjusted to be connected to the second connecting pipe 509;

[0116] When it is necessary to deliver airflow to the storage chamber 103, the communication regulating mechanism is controlled to start, so that the exhaust pipe 502 is connected with the first connecting pipe 508, and the air intake pipe 501 is connected with the outside, so that the first air pump 5 drives the outside airflow to flow into the storage chamber 103 after starting, and the airflow is delivered to the storage chamber 103, so that the air pressure inside the storage chamber 103 increases;

[0117] When it is necessary to discharge the gas inside the storage chamber 103, the control connection regulating mechanism is started, so that the air inlet pipe 501 is connected with the second connecting pipe 509, and the exhaust pipe 502 is connected with the outside, so that after the first air pump 5 is started, the gas inside the storage chamber 103 is driven to flow to the outside, thereby discharging the gas inside the storage chamber 103 and increasing the negative pressure inside the storage chamber 103.

[0118] The connectivity adjustment mechanism includes:

[0119] The rotating block 504 is rotatably mounted inside the cylindrical box 503;

[0120] The third motor 505 is rotatably mounted on the side wall of the cylindrical box 503 and drives the rotating block 504 to rotate via the output shaft;

[0121] Two through ports 506 and two external interfaces 507, one through port 506 and one external interface 507 form a group, and the through ports 506 and external interfaces 507 in the same group are symmetrically arranged.

[0122] Two circular holes 511 are respectively opened at the top and bottom of the cylindrical box 503, and are matched with the two external interfaces 507 respectively;

[0123] When the through port 506 of one group is located at the bottom to connect the air inlet pipe 501 and the second connecting pipe 509, the external port 507 of the same group connects the exhaust pipe 502 and the circular hole 511 at the top;

[0124] When the through port 506 of a group is located at the top to connect the exhaust pipe 502 and the first connecting pipe 508, the external port 507 of the same group connects the intake pipe 501 and the circular hole 511 at the bottom;

[0125] After the third motor 505 is started, the output shaft drives the rotating block 504 to rotate, and the rotating block 504 drives the through port 506 and the external interface 507 to rotate. When the through port 506 of a group is located at the bottom to connect the air inlet pipe 501 and the second connecting pipe 509, and the external interface 507 of the same group is connected to the exhaust pipe 502 and the circular hole 511 on the top, the first air pump 5 is started to drive the gas inside the storage chamber 103 to flow to the outside, so as to discharge the gas inside the storage chamber 103, so that the negative pressure inside the storage chamber 103 increases;

[0126] When the through-port 506 and the external interface 507 are rotated until a group of through-ports 506 are located at the top to connect the exhaust pipe 502 and the first connecting pipe 508, and the external interface 507 of the same group connects the air inlet pipe 501 and the circular hole 511 at the bottom, the first air pump 5 is started to drive the external airflow to flow into the storage chamber 103, thereby delivering airflow to the interior of the storage chamber 103, thereby increasing the air pressure inside the storage chamber 103.

[0127] The drive unit also includes:

[0128] Two outer cylinders 203 are symmetrically fixed on both sides of the top of the passivation cylinder 1;

[0129] Two screws 202 are rotatably mounted inside two outer cylinders 203 respectively;

[0130] Two threaded sleeves 201 are respectively threadedly sleeved on the outside of the two screw rods 202, and the opposite sides of the two threaded sleeves 201 are fixedly connected to the edge of the cover plate 2;

[0131] The partition 210 is fixed at the lower part of the storage chamber 103, and the bottom of the isolation box 209 passes through the partition 210 and communicates with the space below the partition 210;

[0132] Two rotating shafts 204 are respectively fixed to the bottoms of the two screw rods 202, and the bottoms of the two rotating shafts 204 penetrate the partition plate 210 and extend downward;

[0133] Two first synchronous wheels 205 are respectively fixed to the bottom of the two rotating shafts 204;

[0134] The first motor 208 is fixed inside the isolation box 209, and the output shaft of the first motor 208 is fixed with the second synchronous wheel 207;

[0135] The first synchronous belt 206 is transmission-connected to the outside of the two first synchronous wheels 205 and the second synchronous wheel 207;

[0136] After the first motor 208 is started, it drives the second synchronous wheel 207 to rotate, the second synchronous wheel 207 drives the first synchronous belt 206 to transmit, the first synchronous belt 206 drives the first synchronous wheel 205 to rotate, the first synchronous wheel 205 drives the screw 202 to rotate through the rotating shaft 204, and after the screw 202 rotates, it drives the threaded sleeve 201 threadedly connected thereto to move vertically inside the outer cylinder 203, the threaded sleeve 201 drives the cover plate 2 to move, thereby realizing the vertical adjustment of the cover plate 2, and the side walls of the two outer cylinders 203 are provided with a make way groove for the vertical movement of the threaded sleeve 201.

[0137] like Figure 1 A control method for a Dacromet coating passivation device is shown, a gravity sensor is installed at the top connection of the mesh box 3, and the control unit includes a user end. The control method includes the following steps:

[0138] The control unit obtains gravity information M from the gravity sensor;

[0139] The control unit obtains the proportion information x and the weight m of a single part and the segment information Q from the user end, and the segment information Q includes the surging speed v corresponding to each data segment;

[0140] The control unit substitutes the gravity information M, the ratio information x, and the weight m of a single part into A=x(M / m 2 ) to obtain the judgment coefficient A;

[0141] The control unit selects the corresponding surge speed v according to the segment information Q corresponding to the judgment coefficient A;

[0142] The control unit sends the surging speed v to the solution surging component;

[0143] The gravity sensor can detect the weight of the workpiece inside the mesh box 3 to form gravity information M about the weight of the workpiece, and send the gravity information M to the control unit so that the control unit acquires the gravity information M;

[0144] The operator can input the proportion information x, the single part weight m, and the segmentation information Q from the user end. The proportion information x is the proportion coefficient, which is determined by the operator according to the coating thickness of the workpiece as needed. The larger the proportion information x is, the greater the coating thickness of the workpiece is required. The single part weight m is the weight of a workpiece, which is input by the operator according to the measured weight of the single part. The segmentation information Q is to segment the range of the judgment coefficient A. Since the number of workpieces that the mesh box 3 can hold is limited, the range of the segmentation information Q has an upper limit and can be set as needed. Each range segment of the segmentation information Q corresponds to a surge speed v, so that different surge speeds v are adjusted according to different ranges of the segmentation information Q corresponding to the judgment coefficient A;

[0145] It should be noted that the ratio information x and the segment information Q are both variable information, which are selected by the operator according to actual operation needs;

[0146] x(M / m 2 ) in which M / m can calculate the number of workpieces through the weight m of a single part and the gravity information M, so that the surge speed v can be increased when the number of workpieces is large. When the number of workpieces is large, the reaction range is large, which increases the consumption. At this time, increasing the surge replacement speed of the Dacromet liquid is beneficial to the normal coating.

[0147] x(M / m 2 ) 2 The setting makes it possible that when the volume of a single workpiece is large, the surface area of ​​the workpiece inside the mesh box 3 to be coated will be reduced under the same gravity information M due to the large volume of the single workpiece, resulting in different surface areas to be coated when the volume of a single workpiece is large under the same number of workpieces. At this time, the weight of a single part m is used as the denominator for calculation, so that under the same gravity information M, the judgment coefficient A obtained when the volume of a single workpiece is large is smaller, in accordance with the trend that the surface area to be coated is smaller when the volume of a single workpiece is large under the same number of workpieces, thereby facilitating the distinction of workpieces with different single volumes under the same number of workpieces;

[0148] After the control unit obtains the judgment coefficient A, the judgment coefficient A is compared with the range of the segment information Q. For example, when the range of the segment information Q is [A∈(0,5), v=0.1], [A∈(5,10), v=0.2], [A∈(10,15), v=0.3]..., when the judgment coefficient A=7 is obtained, A∈(10,15), then the corresponding v=0.2, that is, the control unit selects v=0.2 as the surging speed v, and then the control unit sends the surging speed v=0.2 to the solution surging component to adjust and control the surging speed of the Dacromet solution;

[0149] It should be noted that the surge velocity v is the liquid flow velocity of the Dacromet liquid through the first connecting pipe 4, and the unit is cm / s;

[0150] In summary, by adjusting the surge speed of the Dacromet liquid according to the number of workpieces and the weight of a single workpiece, the surge speed of the Dacromet liquid can be increased when the surface to be coated increases, which is beneficial to increase the surge speed and replace the Dacromet liquid in time when the amount of Dacromet liquid consumed in the reaction increases, thereby helping to improve the coating effect on the workpiece.

[0151] As an optional embodiment, the driving component includes an infrared sensor and further includes:

[0152] The control unit obtains the height information h1 from the infrared sensor;

[0153] The control unit obtains the liquid level difference h0 from the user end;

[0154] The control unit substitutes H=h1+h0 according to the height information h and the liquid level difference h0 to obtain the liquid level control height H, and generates the liquid discharge control information, the liquid discharge control information includes the control height H, and the liquid discharge control information is used to control the fourth motor 702 to start so as to control the end height of the recovery pipe 7 to be the control height H;

[0155] The control unit sends the discharge control information to the fourth motor 702 to control the fourth motor 702 to start adjusting the end height of the recovery pipe 7 to the control height H;

[0156] The infrared sensor can detect the stacking height of the workpieces inside the mesh box 3 and generate height information h1. The infrared sensor then sends the height information h1 to the control unit so that the control unit acquires the height information h1. After acquiring the height information h1, the control unit generates drainage control information according to the height information h1.

[0157] For example, when the infrared sensor detects that the stacking height of the workpieces inside the mesh box 3 is 30 cm, the infrared sensor generates height information h1=30 cm. The operator needs to control the height of the liquid level to be 40 cm higher than the highest position of the workpiece. At this time, the operator inputs the liquid level difference h0=40 cm from the user end, so that the control unit obtains the liquid level difference h0=40 cm. Subsequently, the control unit substitutes the height information h1=30 cm and the liquid level difference h0=40 cm into H=h1+h0=30 cm+40 cm=70 cm. Then, the control unit generates the drainage control information including the control height H=70 cm.

[0158] Then the control unit sends the discharge control information to the fourth motor 702 to control the fourth motor 702 to start adjusting the end height of the recovery pipe 7 to the control height H=70 cm;

[0159] It should be noted that the above-mentioned height information h1 is the distance between the highest point of the workpiece and the bottom of the mesh box 3, and the control height H is the distance between the liquid surface and the bottom of the dipping chamber 101 after the mesh box 3 is attached to the bottom of the dipping chamber 101;

[0160] In summary, by controlling the height of the liquid level according to the highest point of the workpiece, it is helpful to avoid the situation where the liquid level is too low and the workpiece is not completely immersed, and it is helpful to avoid the situation where the liquid level is too high and the amount of Dacromet liquid in the dipping chamber 101 is excessive and wasteful.

[0161] As an optional embodiment, it also includes:

[0162] The control unit obtains the dipping time information t from the driving component;

[0163] The control unit obtains the standard time T from the user end;

[0164] The control unit substitutes the standard time T and the dipping time information t into the judgment formula t≥T. When the judgment formula is met, the control unit generates centrifugal control information, which is used to control the start of the negative pressure driving component;

[0165] The control unit sends the centrifugal control information to the negative pressure driving component to control the negative pressure driving component to start driving the Dacromet liquid from the dipping chamber 101 into the transition chamber 102 under the action of negative pressure;

[0166] After the driving component drives the mesh box 3 to completely enter the dipping chamber 101, the dipping time is measured and the dipping time information t is generated. Then the driving component sends the dipping time information t to the control unit, so that the control unit obtains the dipping time information t. Before starting, the operator can input the standard time T to be controlled through the user end. Then the control unit substitutes the standard time T and the dipping time information t into the judgment formula t≥T. When the judgment formula is met, the control unit generates centrifugal control information and sends the centrifugal control information to the negative pressure driving component to control the negative pressure driving component to start driving the Dacromet liquid from the dipping chamber 101 into the transition chamber 102 under the action of negative pressure, so as to empty the centrifugal space inside the dipping chamber 101 to facilitate centrifugation.

[0167] As an optional embodiment, it also includes:

[0168] The control unit obtains the feeding information from the gravity sensor;

[0169] The control unit generates drying control information according to the feeding information, and the drying control information is used to control the start of the flip assembly to drive the drying box 8 to adjust to the bottom of the passivation cylinder 1, and to control the start of the driving assembly to drive the mesh box 3 to rotate;

[0170] The control unit sends the spin-drying control information to the flip assembly to control the flip assembly to start and drive the spin-drying box 8 to adjust to the bottom of the passivation cylinder 1;

[0171] The control unit sends the spin-drying control information to the driving component to control the driving component to start driving the mesh box 3 to rotate;

[0172] The gravity sensor generates loading information when it recognizes that the gravity increases and reaches a constant value, and sends the loading information to the control unit, so that the control unit obtains the loading information. After obtaining the loading information, the control unit generates spin-drying control information according to the loading information. Then the control unit first sends the spin-drying control information to the flipping component to control the flipping component to start and drive the spin-drying box 8 to adjust to the bottom of the passivation cylinder 1. Then the control unit sends the spin-drying control information to the driving component to control the driving component to start and drive the mesh box 3 to rotate, thereby realizing the spin-drying control of the workpiece inside the mesh box 3.

[0173] As an optional embodiment, it also includes:

[0174] The control unit obtains the gravity threshold M0 from the user end;

[0175] The control unit brings the gravity threshold M0 and the gravity information M into the judgment formula M0≥M. If the judgment formula is not met, the control unit generates a warning message;

[0176] The control unit sends the warning information to the user end;

[0177] The operator inputs the gravity threshold M0 of the maximum weight of the workpiece that can be placed inside the mesh box 3 from the user end, and the control unit puts the acquired gravity threshold M0 and gravity information M into the judgment formula M0≥M. If the judgment formula is not met, the workpieces placed inside the mesh box 3 are excessive, and the control unit generates a warning message, and then the control unit sends the warning message to the user end to remind the operator that the workpieces placed inside the mesh box 3 are excessive, which is helpful to avoid placing excessive workpieces inside the mesh box 3, thereby affecting the coating effect on the workpieces.

[0178] Working principle of the present invention: The operator places the cleaned workpiece that needs to be coated inside the mesh box 3, and then the control unit controls the driving component to start. After the driving component is started, the mesh box 3 is driven to move downward. After the mesh box 3 moves downward, it gradually enters the interior of the dipping chamber 101. The interior of the dipping chamber 101 contains Dacromet liquid. After the mesh box 3 completely enters the interior of the dipping chamber 101, the workpiece inside the mesh box 3 is completely immersed in the interior of the Dacromet liquid. Then the control unit controls the solution surge component to start. After the solution surge component is started, it drives the Dacromet liquid to gradually surge from the interior of the storage chamber 103 to the interior of the dipping chamber 101, and at the same time drives the Dacromet liquid inside the dipping chamber 101 to slowly flow to the interior of the transition chamber 102, so that the Dacromet liquid inside the dipping chamber 101 forms a slow surge while keeping the amount unchanged, so that the Dacromet liquid forms a dynamic flow, which is conducive to avoiding the situation that the Dacromet liquid around the workpiece is in a static state and the concentration decreases as the reaction gradually proceeds, thereby resulting in a reduced coating effect on the workpiece, thereby helping to improve the coating effect on the workpiece;

[0179] The amount of Dacromet liquid in the dipping chamber 101 remains unchanged, which helps to avoid the situation where the total amount of Dacromet liquid in the storage chamber 103 increases as the Dacromet liquid surges from the storage chamber 103 to the inside of the dipping chamber 101, thereby causing hydraulic and gas pressure effects to form inside the storage chamber 103, interfering with the coating pressure of the workpiece, thereby affecting the final coating effect, which helps to maintain the coating effect on the workpiece;

[0180] The setting of the transition chamber 102 allows the surging Dacromet liquid to be stored inside the transition chamber 102, so that the Dacromet liquid with reduced concentration can be temporarily stored inside the transition chamber 102. The operator can detect the concentration of the Dacromet liquid inside the transition chamber 102 and intervene to adjust it. By adding substances, the concentration of the Dacromet liquid inside the transition chamber 102 is restored to a normal level, and then the restored Dacromet liquid is transported to the storage chamber 103 for storage, so as to keep the concentration of the Dacromet liquid inside the storage chamber 103 stable at a normal coating concentration when coating is performed next time, which is beneficial to improve the coating effect on the workpiece.

[0181] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A Dacromet coating passivation device, comprising a passivation cylinder (1), characterized in that: Also includes: The passivation cylinder (1) comprises a dipping chamber (101), a transition chamber (102) and a storage chamber (103); A mesh box (3) is installed above the passivation cylinder (1) via a driving assembly to drive the passivation cylinder (1) to perform vertical movement adjustment, and the driving assembly also includes a rotating mechanism for driving the passivation cylinder (1) to rotate; A solution surge assembly is installed inside the passivation cylinder (1) and is used to drive the Dacromet solution to surge slowly along a trajectory from the storage chamber (103) to the dipping chamber (101) and then to the transition chamber (102), so as to form a flow replacement of the Dacromet solution; a control unit, configured to control the solution surging component to start driving the Dacromet solution to surge after the mesh box (3) enters the interior of the dipping chamber (101), and to control the solution surging component to drive the Dacromet solution from the dipping chamber (101) to enter the interior of the transition chamber (102) after the dipping is completed, so that a centrifugal cavity is formed inside the dipping chamber (101); The solution surging component comprises: A first connecting pipe (4) is fixed inside the storage chamber (103); the top of the first connecting pipe (4) passes through the top of the storage chamber (103) and then extends to the inside of the dipping chamber (101); a plurality of first openings (401) are formed at the bottom of the first connecting pipe (4); and a first one-way valve (402) is installed inside the first connecting pipe (4); a second connecting pipe (6) fixed inside the storage chamber (103); the top of the second connecting pipe (6) passes through the top of the storage chamber (103) and then extends to the inside of the transition chamber (102); a plurality of second openings (601) are formed at the bottom of the second connecting pipe (6); and a third one-way valve (602) is installed inside the second connecting pipe (6); an air pressure control component installed inside the storage chamber (103) and used to control the air pressure inside the storage chamber (103) so as to drive the Dacromet liquid from the storage chamber (103) into the dipping chamber (101) or from the transition chamber (102) into the storage chamber (103) through changes in the air pressure inside the storage chamber (103); A negative pressure driving component is installed inside the transition chamber (102) and is used to control the Dacromet liquid to enter the transition chamber (102) from the dipping chamber (101) under the action of negative pressure.

2. A Dacromet coating passivation device according to claim 1, characterized in that: The negative pressure driving component comprises: A third air pump (10) is fixed on the outer wall of the passivation cylinder (1), connected to the interior of the transition chamber (102) via an input end, and is used to extract gas from the interior of the transition chamber (102); The recovery pipe (7) is composed of a hard pipe end and a telescopic hose end which are interconnected, the hard pipe end is located inside the transition chamber (102), the telescopic hose end is located inside the dipping chamber (101), and the lowest end of the telescopic hose end is connected to a gravity block; A pulling wire (701), one end of which is fixed to the bottom end of the telescopic hose end, and the other end of which passes through the telescopic hose end and the hard tube end in sequence and then penetrates the side wall of the passivation cylinder (1) and extends out; The fourth motor (702) is fixed to the top of the passivation cylinder (1); a winding roller (703) is fixed to the end of the output shaft of the fourth motor (702); and the other end of the pulling wire (701) is wound around the winding roller (703).

3. A Dacromet coating passivation device according to claim 2, characterized in that: Also includes: A spin drying box (8) rotatably mounted on the top of the passivation cylinder (1); A turning assembly, mounted on the top of the passivation cylinder (1), and used to drive the drying box (8) to turn over; A drying tube (9) fixed to the bottom of the inner wall of the drying box (8); The second air pump (901) is fixed on the outer wall of the spin drying box (8), and the output end of the second air pump (901) is fixedly connected to the drying pipe (9) through a third connecting pipe (902) to transport dry air flow into the interior of the drying pipe (9).

4. A Dacromet coating passivation device according to claim 3, characterized in that: The air pressure control assembly comprises: An isolation box (209) is fixed inside the storage cavity (103) to form an isolated installation space; A first air pump (5) is fixed inside the isolation box (209), wherein an input end and an output end of the first air pump (5) are respectively connected to an air inlet pipe (501) and an air outlet pipe (502); A cylindrical box body (503), wherein the upper and lower ends of one side are respectively connected to the exhaust pipe (502) and the intake pipe (501), and the upper and lower ends of the other side are respectively connected to a first connecting pipe (508) and a second connecting pipe (509), wherein the ends of the first connecting pipe (508) and the second connecting pipe (509) both pass through the isolation box (209) and are connected to the interior of the storage chamber (103), and the interiors of the first connecting pipe (508) and the second connecting pipe (509) are both installed with a second one-way valve (510); A connection adjustment mechanism is installed inside the cylindrical box (503) and is used to connect the air intake pipe (501) to the outside world when the exhaust pipe (502) and the first connecting pipe (508) are connected, and to connect the air intake pipe (501) to the outside world when the intake pipe (501) and the second connecting pipe (509) are connected.

5. A control method for a Dacromet coating passivation device, applicable to a Dacromet coating passivation device according to claim 4, characterized in that: A gravity sensor is installed at the top connection of the mesh box (3), the control unit comprises a user end, and the control method comprises the following steps: The control unit acquires gravity information M from the gravity sensor; The control unit obtains the proportion information x and the single part weight m and segment information Q from the user end, wherein the segment information Q includes the surging speed v corresponding to each data segment; The control unit substitutes the gravity information M, the ratio information x, and the single component weight m into A=x(M / m2) to obtain a determination coefficient A; The control unit selects a corresponding surge speed v according to the segment information Q corresponding to the judgment coefficient A; The control unit sends the surging speed v to the solution surging component.

6. The control method of a Dacromet coating passivation device according to claim 5, characterized in that: The driving assembly includes an infrared sensor and further includes: The control unit obtains height information h1 from the infrared sensor; The control unit obtains the liquid level difference h0 from the user end; The control unit substitutes H=h1+h0 according to the height information h and the liquid level difference h0 to obtain a liquid level control height H, and generates liquid discharge control information, the liquid discharge control information including the control height H, and the liquid discharge control information is used to control the fourth motor (702) to start so as to control the height of the end of the recovery pipe (7) to be the control height H; The control unit sends the liquid discharge control information to the fourth motor (702) to control the fourth motor (702) to start adjusting the end height of the recovery pipe (7) to a control height H.

7. The control method of a Dacromet coating passivation device according to claim 6, characterized in that: Also includes: The control unit obtains dipping time information t from the driving component; The control unit obtains the standard time T from the user terminal; The control unit substitutes the standard time T and the dipping time information t into a judgment formula t≥T, and when the judgment formula is met, the control unit generates centrifugal control information, and the centrifugal control information is used to control the start of the negative pressure driving component; The control unit sends the centrifugal control information to the negative pressure drive component, so as to control the negative pressure drive component to start driving the Dacromet liquid from the dipping chamber (101) into the transition chamber (102) under the action of negative pressure.

8. The control method of a Dacromet coating passivation device according to claim 5, characterized in that: Also includes: The control unit obtains the feeding information from the gravity sensor; The control unit generates spin-drying control information according to the loading information, and the spin-drying control information is used to control the start-up of the flip assembly to drive the spin-drying box (8) to adjust to the bottom of the passivation cylinder (1), and is used to control the start-up of the driving assembly to drive the mesh box (3) to rotate; The control unit sends the spin-drying control information to the flip assembly to control the flip assembly to start driving the spin-drying box (8) to adjust to the bottom of the passivation cylinder (1); The control unit sends the spin-drying control information to the driving component to control the driving component to start driving the mesh box (3) to rotate.

9. The control method of a Dacromet coating passivation device according to claim 5, characterized in that: Also includes: The control unit obtains a gravity threshold M0 from the user terminal; The control unit brings the gravity threshold M0 and the gravity information M into a judgment formula M0≥M, and if the judgment formula is not met, the control unit generates a warning message; The control unit sends the warning information to the user terminal.

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