CN113802154B - Device and method for preparing micro-nozzle on arc-shaped metal surface - Google Patents

Abstract

The patent of the present invention discloses a device and method for preparing a micro-sprinkler on an arc-shaped metal surface. It consists of a liquid collecting tank, wherein the anode cover seals the anode above the upper member, the guide tube connects the upper member and the lower member into a whole, and the core penetrates the anode cover, the anode, the upper member, the guide tube and the lower member. When working, the device is attached to the arc-shaped metal surface, so that the electrolyte flows into the upper member, and the special electrolytic cell of the cathodized arc-shaped metal surface covered by the lower member is connected through the internal flow channel, which causes the current around the central process hole. The density is significantly higher than the current density at the edge of the lower member, and the electrodeposition is preferentially electrodeposited around the process hole to form an electrodeposited structure surrounding the core and increasing. As the electrodeposition continues, the deposition metal builds up around the core, resulting in a micro-shower that is built into the lower member's flared flow channel and wraps around the core.

Description

A device and method for preparing micro-sprinklers on curved metal surfaces

technical field

The invention belongs to the technical field of electrochemical processing, and in particular relates to a device and method suitable for preparing micro-spray heads on arc-shaped metal surfaces.

Background technique

When maintaining large sports venues, it is necessary to carry out daily cleaning operations on sports equipment, ventilation ducts in the building, glass curtain walls and other positions. However, the cleaning object usually has a non-planar groove structure, which accommodates dirt and affects the function and appearance, which becomes the difficulty and hidden danger of the cleaning operation. For the cleaning of different types of groove structures, the development of customized high-efficiency cleaning equipment and exclusive functions has broad application prospects. For this reason, the customized development of micro-nozzle structures on general-purpose pressure tubes or containers has become an effective means of quickly cleaning complex surface groove structures.

In order to realize the customized cleaning function, the position and structure of the customized nozzle can be completed by means of split assembly, welding, EDM or laser processing. Although these technologies have their own processing and manufacturing advantages, there are problems such as large structure size of the nozzle, easy deformation of components, low precision of inner holes, simple hole structure, and insufficient depth-to-diameter ratio, which affect the cleaning efficiency of the equipment. The electroplating and electroforming technology based on the principle of electrochemical deposition has the advantages of compact material and controllable performance. It has been widely used in the preparation of thin-layer metals and precision parts. However, the electro-deposition process based on the bath plating mode has production efficiency. Low, many process links, difficult demoulding, poor adaptability and other deficiencies, cannot meet the needs of specific metal component forming. Different from the electrodeposition method of the tank plating mode, in order to achieve a specific electrodeposition structure on the curved metal surface of the existing pressure vessel, it is necessary to rebuild a special electrolytic cell and electrode arrangement. The invention discloses a device and a method for preparing a micro-spray head on a metal surface, and improves electrodeposition efficiency and electrodeposition quality while preparing a micro-spray head on an arc-shaped metal surface.

Contents of the invention

The object of the present invention is to provide a device for preparing micro-spray heads on arc-shaped metal surfaces and a method for preparing micro-spray heads, so as to realize customized processing and forming of the spray heads on arc-shaped metal surfaces.

For achieving the above object, technical scheme of the present invention is:

A device for preparing a micro-spray head on an arc-shaped metal surface, comprising a core, an anode cover, an anode, an upper member, a power supply, a draft tube, a lower member, an electrolyte circulation system and an electrolyte collection tank, and is characterized in that: The anode cover seals the anode above the upper component, and the draft tube connects the upper component and the lower component as a whole; the core runs through the anode cover, the anode, the upper component, the draft tube, and the lower component; the electrolyte circulation system is connected with the upper component The components are connected, and the lower component has a trumpet-shaped flow channel inside, and 4 to 8 liquid outlets are arranged on the edge of the lower end.

The core is an engineering plastic profile with a diameter of less than 2mm, preferably a nylon rod.

The anode is a disc-shaped insoluble anode with a through hole in the middle, made of stainless steel, platinum or titanium.

The material of the upper member is corrosion-resistant polyvinyl chloride or nylon.

The material of the guide tube is an engineering material with high light transmittance, preferably plexiglass.

The material of the lower member is corrosion-resistant silicon rubber.

A method for preparing a micro-sprinkler on a curved metal surface, comprising the following steps:

S1. Drill a process hole on the curved metal surface, and perform pretreatment operations such as degreasing, grinding, cleaning, and activation on the surrounding surface in sequence;

S2. Install the device for preparing micro-sprinklers on the arc-shaped metal surface, make the lower member closely fit the arc-shaped metal surface, place the core in the process hole of the arc-shaped metal surface, and adjust the core to be in the center of the device On the shaft, the positive pole of the power supply is connected to the anode, and the negative pole of the power supply is connected to the arc-shaped metal surface;

S3. Start the electrolyte circulation system, so that the electrolyte flows through the cavity formed by the upper member, anode, guide tube and lower member, flows out from the liquid outlet at the lower edge of the lower member, and collects in the electrolyte collection tank recycle;

S4. Start the power supply. Under the action of the power supply voltage, an electrodeposition current is generated between the anode and the arc-shaped metal surface covered by the lower component, and the cathodic arc-shaped metal surface restricted by the electrolyte in the trumpet-shaped flow channel of the lower component produces a central high , the low current density distribution around it causes the electrochemical deposition reaction of metal ions in the electrolyte to concentrate around the process hole of the core. As the electrodeposition continues, the accumulation of deposited metal around the core increases, and then a trumpet-like flow built in the lower component is formed. A micro-sprinkler in the channel and wrapped around the core;

S5. When the height of the micro-spray head meets the design requirements, turn off the power supply and the electrolyte circulation system, remove the components above the micro-spray head, remove the core, and complete the processing, and finally realize the arc-shaped metal surface to prepare the micro-spray head.

The working principle of the electrodeposition growth of the micro-spray head involved in the present invention is introduced as follows.

Based on the principle of electrochemical electrodeposition, the invention reconstructs a special electrode arrangement form and an electrolyte flow area between electrodes. In terms of electrode arrangement, only the annular area of the disc-shaped anode placed on the upper member contacts the electrolyte, which is much smaller than the area of the anodized arc-shaped metal surface covered by the lower member. Therefore, the different distances between the arc-shaped metal surface and the anode cause a central The current density around the process hole is significantly higher than the current density at the edge of the lower member. This current density distribution characteristic leads to preferential electrodeposition around the process hole to form an electrodeposition bulge structure surrounding the core and increasing continuously. As the electrodeposited raised structures increase continuously upward, the electrodeposition current is further concentrated at the front end of the electrodeposited raised structures. At the same time, the electrodeposited ridge structure growing against the trend in the trumpet-shaped flow channel of the lower member appears a shape similar to the inner wall surface of the lower member as the flow cross section of the electrolyte shrinks. Observe the height of the electrodeposition raised structure through the transparent guide tube, and stop the electrodeposition process when it reaches the predetermined height of the micro-spray head.

Compared with the prior art, the present invention has the following advantages.

1. The structure of the micro nozzle is reasonable, the aperture is fine and the quality of the inner hole is good. The present invention prepares the micro-spray head with a streamlined shape structure from bottom to top, the lower end can be firmly attached to the arc-shaped metal surface, and the outer diameter of the upper end is small, which is beneficial to group arrangement of multiple spray heads. Using a micro-diameter core can obtain an inner pore structure with a pore size as small as tens of microns.

2. Low processing conditions and environmental requirements, suitable for on-site processing of micro-spray heads. The equipment adopted in the invention is simple and can work under normal temperature conditions and in an open environment. There is no need to move the workpiece to be processed, and the device is arranged on the required arc-shaped metal surface. According to the aforementioned process flow, the micro-nozzle preparation process can be performed on the arc-shaped metal surface at the process site.

3. The micro nozzle is easy to control. The micro-spray head of the present invention is formed based on electrochemical deposition growth. By adjusting the power supply parameters and electrodeposition time, the height of the micro-spray head can be adjusted conveniently and accurately to meet the functional requirements. At the same time, the transformation of the horn-shaped flow channel of the lower component can also Change the external configuration of the micro-sprinkler.

Description of drawings

Fig. 1 is a sectional view of the internal structure of the device of the present invention.

Fig. 2 is a schematic diagram of electrolyte circulation in the device of the present invention.

Fig. 3 is a working schematic diagram of the device of the present invention preparing metal micro-sprinklers on an arc-shaped metal surface.

Fig. 4 is a three-dimensional cross-sectional view of a metal micro-spray head prepared on an arc-shaped metal surface according to the present invention.

Fig. 5 is a metal micro-spray head prepared on a curved metal surface according to the present invention.

Labels and names in the figure:

1. Core; 2. Anode cover; 3. Anode; 4. Upper member; 5. Power supply; ; 8. Micro nozzle; 9. Arc metal surface; 10. Electrolyte circulation system; 11. Electrolyte collection tank.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

The specific embodiments of the present invention are as follows.

A titanium disc with an outer diameter of 10 mm is used as the anode 3 and placed in the groove on the top of the upper member 4. The anode cover 2 made of nylon screw-presses the anode, and is connected to the electrolyte through an internal channel with an inner diameter of 5 mm. The upper member 4 is made of polyvinyl chloride, with a T-shaped flow channel inside, the two horizontal ends are the electrolyte inlet, and the lower end is the liquid outlet. The plexiglass tube of transparent material is used as the guide tube 6 to connect the lower end of the upper member 4 with the upper end of the lower member 7, and the joint is sealed with a sealant. The lower member 7 made of silicone rubber, the inner cavity gradually expands from the electrolyte inlet end (diameter 5mm) to the diameter of the lower end edge is 50mm, which is a trumpet-shaped flow channel 7-1, and 8 outlets are evenly distributed on the edge of the lower member. Liquid port 7-2. A slender nylon rod with an outer diameter of 1 mm is used as the core 1 , and the core 1 runs through the anode cover 2 , the anode 3 , the upper member 4 , the draft tube 6 , and the lower member 7 .

2-3 liters of nickel-containing plating solution is housed in the semi-closed electrolytic solution collection tank 11, and the composition is 250 g/L of nickel sulfate, 10 g/L of nickel chloride, 30 g/L of boric acid, and the pH value is 4.0. The electrolyte filtration circulation system 10 composed of a magnetic pump and a filter transports the electrolyte to the upper member 4 and makes the electrolyte circulate.

The implementation method of the present invention to prepare the metal micro-sprinkler on the curved metal surface is as follows.

Drill a 1mm through hole on the arc-shaped metal surface 9 of a barrel-shaped pressure vessel with a wall thickness of 2mm, remove the dirt on the outer surface, use a degreasing agent to remove the oil on the surface, and use 600 to 2000 mesh sandpaper to polish and rinse the surface in turn, and then Surface activation was performed with dilute hydrochloric acid at a concentration of 10 wt%. Then the assembled device is moved to the arc-shaped metal surface 9 to be processed, the nylon rod is placed in the pre-processed through hole, and the nylon rod is adjusted so that it is located at the axial position of the hollow passage of the draft tube 6 and the lower member 7. The auxiliary bracket is used to act on the top of the upper member, so that the lower member 7 is attached to the arc-shaped metal surface 9 of the pressure vessel.

The positive pole of the power supply 5 is connected with the anode 3 , and the negative pole of the power supply 5 is connected with the arc-shaped metal surface 9 .

Start the electrolyte circulation system 10, and the magnetic pump will input the electrolyte in the electrolyte collection tank 10 into the port of the upper member, so that the electrolyte flows through the cavity formed by the upper member 3, the anode 3, the guide tube 6 and the lower member 7 body, and flow out from the liquid outlet 7-2 at the edge of the lower end of the lower member, and then collect in the electrolyte sump 10 for recycling.

Start the power supply 5, set it to the constant voltage working mode, and adjust the voltage to 5V. Under the action of the power supply voltage, an electrodeposition current is generated between the anode 3 and the arc-shaped metal surface 9 covered by the lower member 7, and the horn-shaped flow of the lower member The cathodic arc-shaped metal surface 9 restricted by the electrolyte in Road 7-1 produces a current density distribution with a high center and low surroundings, which causes the electrochemical deposition reaction of metal ions in the electrolyte to concentrate around the process hole of the core, resulting in a process The preferential electrodeposition around the hole forms an ever-increasing electrodeposited raised structure surrounding the nylon rod. As the electrodeposited raised structures increase continuously along the nylon rod, the electrodeposition current is further concentrated at the front end of the electrodeposited raised structures. At the same time, the electrodeposited ridge structure growing against the trend in the trumpet-shaped flow channel of the lower member appears a shape similar to the inner wall surface of the lower member as the flow cross section of the electrolyte shrinks.

Observe the height of the electrodeposition uplift structure through the transparent guide tube 6. When it reaches the predetermined height of the micro-spray head, turn off the power supply 5 and the electrolyte circulation system 10, remove the upper components, remove the nylon rod, complete the processing, and finally realize the curved metal Surface 9 prepares micro-spray head 8.

The scope of protection of the present invention is not limited to the embodiments described above. Without departing from the essence of the present invention, any obvious improvement, replacement or change that can be made by those skilled in the art belongs to the protection scope of the present invention.

Claims (9)

1. A device for preparing micro-sprinklers on arc-shaped metal surfaces, including a core (1), an anode cover (2), an anode (3), an upper member (4), a power supply (5), and a guide tube (6 ), the lower member (7), the arc-shaped metal surface (9), the electrolyte circulation system (10) and the electrolyte liquid collection tank (11), characterized in that: the anode (3) is placed on the upper member (4 ), the anode cover (2) screw-presses the anode (3) tightly, and connects with the electrolyte through the internal channel; the upper member (4) is provided with a T-shaped flow channel inside, and the horizontal ends are Electrolyte inlet, the lower end of the liquid; the guide tube (6) connects the upper member (4) and the lower member (7) as a whole; the core (1) runs through the anode cover (2), the anode ( 3), the upper member (4), the guide tube (6) and the lower member (7); the lower member (7) has a trumpet-shaped flow channel (7-1) inside, and 4 to There are 8 liquid outlets (7-2), and the lower member (7) is closely attached to the arc-shaped metal surface (9). 2. A device for preparing micro-sprinklers on arc-shaped metal surfaces according to claim 1, characterized in that: the core (1) is an engineering plastic profile with a diameter of less than 2mm. 3. A device for preparing micro-spray nozzles on arc-shaped metal surfaces according to claim 1, characterized in that: the core (1) is a nylon rod with a diameter of less than 2mm. 4. A device for preparing micro-spray nozzles on arc-shaped metal surfaces according to claim 1, characterized in that: the anode (3) is a disc-shaped insoluble anode with a through hole in the middle, and the material is stainless steel, platinum or titanium. 5. The device for preparing micro-spray nozzles on arc-shaped metal surfaces according to claim 1, characterized in that: the material of the upper member (4) is corrosion-resistant polyvinyl chloride or nylon. 6. The device for preparing micro-sprinklers on a curved metal surface according to claim 1, characterized in that: the material of the guide tube (6) is an engineering material with high light transmittance. 7. A device for preparing micro-sprinklers on a curved metal surface according to claim 1, characterized in that: the material of the guide tube (6) is plexiglass. 8. The device for preparing micro-sprinklers on arc-shaped metal surfaces according to claim 1, characterized in that: the material of the lower member (7) is corrosion-resistant silicone rubber. 9. A method for preparing a micro-sprinkler on a curved metal surface, characterized in that: comprising the following steps: S1. Drill a process hole on the arc-shaped metal surface (9), and degrease, polish, clean, and activate pretreatment operations on the surrounding surface in sequence; S2. Install the device for preparing micro-sprinklers on arc-shaped metal surfaces according to any one of claims 1-8, so that the lower member (7) is closely attached to the arc-shaped metal surface, and the core (1) is placed on the arc-shaped metal surface (9) in the process hole, and adjust the core (1) to be on the central axis of the device, the positive pole of the power supply (5) is connected to the anode (3), and the negative pole of the power supply (5) is connected to the arc-shaped metal surface (9). ; S3. Start the electrolyte circulation system (10), so that the electrolyte flows through the cavity formed by the upper member (4), the anode (3), the guide tube (6) and the lower member (7), from the lower member (7) ) flows out from the outlet (7-2) at the edge of the lower end, collects the electrolyte solution in the collection tank (11) and recycles it; S4. Start the power supply (5). Under the action of the power supply voltage, an electrodeposition current is generated between the anode (3) and the arc-shaped metal surface (9) covered by the lower member (7), and is subjected to the horn-shaped flow of the lower member (7). The cathodic arc-shaped metal surface restricted by the electrolyte in channel (7-1) produces a current density distribution that is high in the center and low in the surrounding area, causing the electrochemical deposition reaction of metal ions in the electrolyte to concentrate in the process hole of the core (1) Around, as the electrodeposition continues, the accumulation of deposited metal around the core (1) increases, thereby forming a micro-nozzle (8) built into the trumpet-shaped flow channel of the lower member (7) and wrapping the core (1); S5. When the height of the micro-spray head meets the design requirements, turn off the power supply (5) and the electrolyte circulation system (10), and remove the lower member (7), guide tube (6) and upper member ( 4) The components are formed, the core (1) is removed, the processing is completed, and the arc-shaped metal surface (9) is finally realized to prepare the micro-nozzle (8).

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