A device for electroless plating nickel on the surface of diamond micro-powder

Abstract

The utility model relates to a kind of diamond micro-powder surface chemical nickel plating device of diamond abrasive processing technical field, including nickel plating container, stirring subassembly, ultrasonic vibration subassembly and chemical plating liquid dispensing subassembly;Stirring subassembly includes stirring support, stirring motor, stirring rod and stirrer;Ultrasonic vibration subassembly includes ultrasonic vibration tank, the lower half portion of nickel plating container is immersed below the liquid level in ultrasonic vibration tank, for the ultrasonic high-frequency vibration treatment to material in nickel plating container;Chemical plating liquid dispensing subassembly includes the liquid supplementing tank for placing dispensing liquid container and the liquid supplementing pump for conveying dispensing liquid from dispensing liquid container to nickel plating container, and the pH meter for detecting material inside nickel plating container.The chemical nickel plating device reduces the difficulty of manual operation, improves the uniformity of chemical nickel plating, helps to ensure nickel plating efficiency and nickel plating effect.

Description

Technical Field

[0001] This utility model belongs to the field of diamond abrasive processing technology, specifically relating to a device for chemical nickel plating on the surface of diamond micro powder. Background Technology

[0002] Diamond abrasive is a fine powder with extremely high hardness and wear resistance. It is widely used as a high-performance grinding material in precision manufacturing, optical processing, and jewelry polishing. It is also a crucial raw material for cutting and grinding tools (such as grinding wheels, cutting discs, drill bits, and cutting tools) used in the cutting and polishing of metals, ceramics, and glass. Diamond abrasive is also frequently added to the jetting liquid in water jet cutting. To improve the strength and interfacial bonding of diamond abrasive, reduce the probability of diamond particles detaching from the matrix, and provide oxygen protection and reduce thermal damage, diamond abrasive is usually nickel-plated, meaning one or more layers of metallic nickel are plated onto its surface. The most common methods for nickel plating diamond are electroless nickel plating and electroplating. The general steps for electroless nickel plating are as follows: First, diamond powder (bare abrasive) is pre-treated by cleaning in a solution (such as sodium hydroxide solution) for degreasing. Then, it is activated in an activation solution composed of palladium chloride, sodium bromide, ammonium acetate, and deionized water. Finally, it is electroless nickel plating in a solution composed of nickel sulfate, nickel acetate, sodium hypophosphite, ammonia, and deionized water. During electroless nickel plating, the solution and diamond powder must be continuously stirred to ensure the diamond powder is evenly dispersed in the solution, guaranteeing the uniformity of the electroless nickel plating. However, existing electroless nickel plating equipment is relatively simple, and the stirring and dispersion effects are not ideal. Furthermore, the high specific gravity of diamond powder makes it prone to sedimentation at the bottom of the container, thus affecting the nickel plating effect. Additionally, the pH of the electroless plating solution needs real-time adjustment during the process (the pH of waste electroless plating solution is generally 4-6), requiring the timely addition of conditioning components (usually by adding ammonia dropwise to the electroless plating solution to adjust the pH to 5-6). Currently, this is mainly done manually, with manual detection and dropwise addition of ammonia. A method for surface nickel plating of artificial diamond, as described in patent document CN106835086B, is relatively cumbersome, increasing workload and affecting efficiency. Therefore, it is necessary to design a more convenient electroless nickel plating device for diamond powder to improve efficiency and plating effect. Summary of the Invention

[0003] In view of the above situation, this utility model provides a device for electroless nickel plating on the surface of diamond micro powder, which reduces the difficulty of manual operation and improves the uniformity of electroless nickel plating, thus helping to ensure the efficiency and effect of nickel plating.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A device for electroless nickel plating of diamond micro powder includes a nickel plating container for holding diamond micro powder and electroless plating solution, a stirring component for auxiliary stirring of the materials inside the nickel plating container, and also includes an ultrasonic vibration component and an electroless plating solution preparation component.

[0005] The stirring assembly includes a stirring bracket, a stirring motor, and a stirring rod. The stirring motor is mounted on the stirring bracket. The upper end of the stirring rod is detachably mounted below the output end of the stirring motor. The lower part of the stirring rod is rotatably inserted below the liquid surface inside the nickel plating container. A stirrer is connected to the lower end of the stirring rod. The ultrasonic vibration assembly includes an ultrasonic vibration tank. The lower half of the nickel plating container is immersed below the liquid surface in the ultrasonic vibration tank for ultrasonic high-frequency vibration treatment of the material inside the nickel plating container. The chemical plating solution preparation assembly includes a replenishment tank for placing the preparation solution container, a replenishment pump for conveying the preparation solution from the preparation solution container to the nickel plating container, and a detection head for detecting the material inside the nickel plating container. Furthermore, the replenishment tank is integrally fixed to the right side of the ultrasonic vibration tank, and the electrical control box is integrally fixed to the right side of the replenishment tank. The ultrasonic vibration tank, the replenishment tank, and the electrical control box are all housed in a single device housing.

[0006] Furthermore, the stirring support includes a horizontal crossbar and a vertical lifting rod. The stirring motor is fastened to one end of the horizontal crossbar by a ring clamp. The upper end of the stirring rod is detachably mounted on the lower end of the output shaft of the stirring motor by a drill chuck. The vertical lifting rod is a vertically arranged electric telescopic rod, and the telescopic rod side wall is provided with a guide groove to prevent the telescopic rod from rotating circumferentially. The base of the electric telescopic rod is fixedly connected to the top of the electrical control box. The right end of the horizontal crossbar is connected to the telescopic end of the electric telescopic rod by a cross-shaped connecting block.

[0007] Furthermore, an ultrasonic transducer is installed below the bottom of the ultrasonic vibration tank. The ultrasonic transducer is electrically connected to an ultrasonic generator, which is housed in an electrical control box. The control panel of the ultrasonic generator extends beyond the front panel of the electrical control box and is equipped with a power switch and an adjustment knob.

[0008] Furthermore, the replenishment pump is a peristaltic pump, with the inlet pipe extending below the liquid level inside the mixing container and the outlet pipe suspended above the opening of the nickel-plated container by a horizontal crossbar. Both the inlet and outlet pipes of the peristaltic pump are made of transparent rubber hoses.

[0009] Furthermore, the preparation solution is ammonia; the detection head is a pH meter; the upper end of the pH meter is connected to the outside of the annular clamp via a connecting rod; the electrical control box is equipped with an automatic control system, preferably a microcontroller; both the pH meter and the peristaltic pump are connected to the automatic control system.

[0010] Furthermore, the stirring motor is a speed-regulating motor, which is equipped with a motor speed controller to control the speed of the stirring motor. The motor speed controller is installed in the electrical control box and connected to the automatic control system. The operation panel of the motor speed controller extends beyond the front panel of the electrical control box.

[0011] Furthermore, a spring clip is movably fitted on the outside of the stirring container to prevent it from tipping over. One side of the spring clip has an openable elastic opening, and the other side of the spring clip has a support tail. The support tail is fixedly connected to the device housing by connecting screws.

[0012] This utility model also includes other components that enable its normal use, all of which are conventional means in the field. In addition, any devices or components not limited in this utility model adopt the prior art in the field.

[0013] The beneficial effects of this utility model are as follows: This invention provides a device for electroless nickel plating of diamond micropowder. It uses ultrasonic high-frequency vibration combined with a stirrer to improve the dispersion uniformity of diamond micropowder in the electroless plating solution, ensuring the effective contact area between the diamond micropowder and the electroless plating solution. This also improves the uniformity of electroless nickel plating. Furthermore, it employs online pH meter detection and peristaltic pump automatic addition of the preparation solution, reducing the difficulty of manual addition and preparation, and helping to ensure the efficiency and effect of nickel plating. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the electroless nickel plating apparatus in the embodiment; Figure 2 for Figure 1 Schematic diagram of the structure viewed from the center line AA; Figure 3 for Figure 1 A schematic diagram of the structure viewed from the center along the BB line. Detailed Implementation

[0015] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without creative effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "center," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] Example like Figure 1-3 As shown, a device for electroless nickel plating of diamond micro powder includes a nickel plating container 1 for holding diamond micro powder and electroless plating solution, a stirring component for auxiliary stirring of the materials inside the nickel plating container, an ultrasonic vibration component, and an electroless plating solution mixing component.

[0018] The stirring assembly includes a stirring bracket, a stirring motor 2, and a stirring rod 3. The stirring motor is mounted on the stirring bracket. The upper end of the stirring rod is detachably mounted below the output end of the stirring motor. The lower part of the stirring rod is rotatably inserted below the liquid surface inside the nickel-plating container. A stirrer 4 is connected to the lower end of the stirring rod. The stirrer is an anchor-type stirrer, and the stirring rod and stirrer are preferably integrally molded from tetrafluoroethylene material with high wear resistance and low coefficient of friction.

[0019] The ultrasonic vibration assembly includes an ultrasonic vibration tank 5, in which the lower half of the nickel plating container is submerged below the liquid surface. This is used to perform ultrasonic high-frequency vibration treatment on the material in the nickel plating container, which helps to distribute the diamond micro powder more evenly in the chemical plating solution under high-frequency vibration, avoids precipitation, and improves the uniformity of nickel plating.

[0020] The chemical plating solution preparation assembly includes a replenishment tank 7 for holding the preparation solution container 6, a replenishment pump 8 for conveying the preparation solution from the preparation solution container to the nickel plating container, and a detection head 9 for detecting the material inside the nickel plating container. Both the nickel plating container and the preparation solution container are plastic measuring cups. Specifically, the replenishment tank is integrally fixed to the right side of the ultrasonic vibration tank, and the electrical control box 10 is integrally fixed to the right side of the replenishment tank. The ultrasonic vibration tank, the replenishment tank, and the electrical control box are all housed in a single device housing, which is preferably a sheet metal housing supported by sheet metal.

[0021] Specifically, the stirring support includes a horizontal crossbar 11 and a vertical lifting rod 12. The stirring motor is fastened to one end of the horizontal crossbar via an annular clamp 13. The upper end of the stirring rod is detachably mounted on the lower end of the output shaft of the stirring motor via a drill chuck 14. The drill chuck is preferably a hand-tight three-jaw drill chuck, which facilitates quick connection and disconnection between the stirring rod and the stirring motor. The hand-tight three-jaw drill chuck is similar to a common pistol drill chuck and is existing technology, so it will not be described in detail here.

[0022] The vertical lifting rod is a vertically installed electric telescopic rod, and the telescopic rod side wall is provided with a guide groove 15 to prevent possible circumferential rotation of the telescopic rod. The base of the electric telescopic rod is fixedly connected to the top of the electrical control box, and the right end of the horizontal crossbar is connected to the telescopic end of the electric telescopic rod through a cross-shaped connecting block 16. The locking set screw is preferably a Torx handle screw, which facilitates the vertical and horizontal position adjustment of the horizontal crossbar. The cross-shaped connecting block and the Torx handle screw are both existing technologies and will not be described in detail here.

[0023] Specifically, an ultrasonic transducer 17 is installed below the bottom of the ultrasonic vibration tank. The ultrasonic transducer is electrically connected to an ultrasonic generator 18, which is housed in an electrical control box. The control panel of the ultrasonic generator extends beyond the front panel of the electrical control box and includes a power switch and adjustment knob. Both the ultrasonic transducer and the ultrasonic generator are existing technologies commonly found in ultrasonic cleaning machines and will not be described in detail here.

[0024] Specifically, the replenishment pump is a peristaltic pump. The inlet pipe 19 of the peristaltic pump extends below the liquid surface inside the mixing container, and the outlet pipe 20 of the peristaltic pump is suspended above the opening of the nickel-plated container by a horizontal crossbar. Both the inlet and outlet pipes of the peristaltic pump are made of transparent rubber hoses. The front of the outlet pipe is suspended below the horizontal crossbar, and a slack is provided for the electric telescopic rod to raise and lower. The peristaltic pump is prior art and will not be described in detail here.

[0025] Specifically, the preparation solution is ammonia water, and the detection head is a pH meter. The upper end of the pH meter is connected to the outside of the annular clamp via a connecting rod 21. The pH meter can rise and fall with the connecting rod. When the pH meter descends, its detection head can be inserted below the surface of the chemical plating solution to detect the acidity and alkalinity. The electrical control box is equipped with an automatic control system, which can be a single-chip microcomputer PCBA board. The pH meter and the peristaltic pump are both connected to the automatic control system. The automatic control system of the single-chip microcomputer PCBA board adopts existing technology and will not be described in detail here.

[0026] Specifically, the stirring motor is a speed-regulating motor, and the speed-regulating motor is equipped with a motor speed controller 22, which can realize the speed control of the stirring motor. The motor speed controller is installed in the electrical control box and connected to the automatic control system. The operation panel of the motor speed controller extends beyond the outside of the front panel of the electrical control box.

[0027] Specifically, a spring clip 23 is movably fitted on the outside of the stirring container to prevent it from tipping over. The spring clip is made of stainless steel spring sheet material. One side of the spring clip is provided with an openable "Ω"-shaped elastic opening for the stirring container to move in and out. The nickel-plated container can move in and out through the middle of the elastic opening. The other side of the spring clip is provided with a support tail, which is fixedly connected to the device housing by connecting screws 24.

[0028] Before nickel plating, diamond powder and chemical plating solution are placed into a nickel plating container. The electric telescopic rod extends, the horizontal bar rises, and the container is then placed in the water of an ultrasonic vibration tank, simultaneously engaging a spring clamp. The electric telescopic rod then retracts, and the horizontal bar gradually descends, inserting the agitator below the surface of the chemical plating solution in the nickel plating container. Under the stirring action of the agitator and the high-frequency ultrasonic vibration, the diamond is dispersed as evenly as possible in the chemical plating solution, ensuring uniform nickel plating. During the nickel plating process, the electric telescopic rod... Under the programmed settings of the microcontroller-based automatic control system, the system automatically raises and lowers a specific height at regular intervals, while simultaneously agitating with a stirrer to further improve the uniformity of the agitation. At the same time, a pH meter is periodically inserted into the chemical plating solution to detect the acidity or alkalinity. When the pH is detected to be too low, the automatic control system controls a peristaltic pump to pump a mixing solution (such as ammonia) dropwise from the mixing solution container into the chemical plating solution in the nickel plating container until the pH value of the chemical plating solution is adjusted to a suitable range (generally between pH 5 and 6) to ensure the nickel plating effect of the diamond micropowder.

[0029] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A device for electroless nickel plating of diamond micropowder, comprising a nickel plating container for holding diamond micropowder and electroless plating solution, and a stirring assembly for auxiliary stirring of the materials inside the nickel plating container, characterized in that: It also includes an ultrasonic vibration component and a chemical plating solution preparation component; the stirring component includes a stirring bracket, a stirring motor, and a stirring rod. The stirring motor is mounted on the stirring bracket, and the upper end of the stirring rod is detachably mounted below the output end of the stirring motor. The lower part of the stirring rod is rotatably inserted below the liquid surface inside the nickel plating container, and a stirrer is connected to the lower end of the stirring rod; the ultrasonic vibration component includes an ultrasonic vibration tank, and the lower half of the nickel plating container is immersed below the liquid surface in the ultrasonic vibration tank for ultrasonic high-frequency vibration treatment of the material inside the nickel plating container; the chemical plating solution preparation component includes a replenishment tank for placing the preparation solution container, a replenishment pump for conveying the preparation solution from the preparation solution container to the nickel plating container, and a detection head for detecting the material inside the nickel plating container.

2. The apparatus for electroless nickel plating of diamond micropowder according to claim 1, characterized in that: The replenishment tank is connected to the right side of the ultrasonic vibration tank, and the right side of the replenishment tank is connected to the electrical control box.

3. The apparatus for electroless nickel plating of diamond micropowder according to claim 2, characterized in that: The mixing support includes a horizontal crossbar and a vertical lifting rod. The mixing motor is fastened to one end of the horizontal crossbar by a ring clamp. The upper end of the mixing rod is detachably installed at the lower end of the output shaft of the mixing motor by a drill chuck. The vertical lifting rod is a vertically arranged electric telescopic rod. The base of the electric telescopic rod is fixedly connected to the top of the electrical control box. The right end of the horizontal crossbar is connected to the telescopic end of the electric telescopic rod by a cross-shaped connecting block.

4. The apparatus for electroless nickel plating of diamond micropowder according to claim 3, characterized in that: An ultrasonic transducer is installed at the bottom of the ultrasonic vibration tank. The ultrasonic transducer is electrically connected to an ultrasonic generator, which is housed in an electrical control box.

5. The apparatus for electroless nickel plating of diamond micropowder according to claim 4, characterized in that: The replenishment pump is a peristaltic pump. The inlet pipe of the peristaltic pump extends below the liquid level inside the mixing container, and the outlet pipe of the peristaltic pump is suspended above the opening of the nickel plating container by a horizontal crossbar.

6. The apparatus for electroless nickel plating of diamond micropowder according to claim 5, characterized in that: The preparation solution is ammonia; the detection head is a pH meter; the upper end of the pH meter is connected to the outside of the annular clamp via a connecting rod.

7. The apparatus for electroless nickel plating of diamond micropowder according to claim 6, characterized in that: The stirring motor is a speed-regulating motor, which is equipped with a motor speed controller, which is installed in the electrical control box.

8. The apparatus for electroless nickel plating of diamond micropowder according to claim 7, characterized in that: The nickel-plated container is movably fitted with a spring clip to prevent it from tipping over, and one side of the spring clip has an openable elastic opening.

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