KR100481302B1 - Method for manufacturing electro-plated diamond wheel and electro-plated diamond wheel manufactured by the method, and apparatus for plating diamond wheel - Google Patents

Abstract

Method of manufacturing an electrodeposited diamond wheel according to an embodiment of the present invention comprises the steps of manufacturing a shank of a predetermined shape, using a mesh net jig to increase the concentration of diamond particles to the grinding surface of the shank, the grinding surface of the shank A first nickel electrodeposition plating step of nickel plating up to 5-10% of the diamond particle size to fix the diamond particles in contact, after the first nickel electrodeposition plating step, the mesh network is removed, and the excess diamond particles are recovered. And a second nickel electrodeposition plating step of nickel plating up to 60% of the diamond particle size in order to firmly fix the diamond particles fixed to the grinding surface of the shank.

Description

METHOD FOR MANUFACTURING ELECTRO-PLATED DIAMOND WHEEL AND ELECTRO-PLATED DIAMOND WHEEL MANUFACTURED BY THE METHOD, AND APPARATUS FOR PLATING DIAMOND WHEEL}

The present invention relates to a method for producing an electrodeposited diamond wheel or tool and a diamond wheel or tool produced by the method. In more detail, the present invention is electrodeposition diamond using an elastic mesh mesh (Jesh Sieve) as a jig for electrodepositing the concentration of diamond particles in the shank in the step of electrodepositing diamond powder (Diamond Powder) to the shank A method for manufacturing a wheel.

In general, diamond tools are divided into applications, for ferrite magnets, for ferrite cores, for sheet glass processing, for crystal vessel processing, for motor shaft cutting, for carbide tools and cermets. , Classified for stone processing, etc., and classified by bonds, resin bond wheels made of a mixture of resin (e.g., phenol, polyimide, etc.) with diamond or CBN, and metal (e.g., For example, metal bond wheels made by mixing Cu, Co, Sn and the like with diamond or CBN, vitrified bond wheels using Al2O3 as a vitrified bond, a metal surface Nickel is plated on, and the nickel is divided into an electroplated diamond wheel (Electroplated Diamond Wheel), which serves to bond the diamond or CBN particles.

Electroplated Diamond Wheel (Electroplated Diamond Wheel) related to the present invention is used in ferrite magnets, ferrite cores, etc.), edge processing of optical lenses, finishing of molds, cutting of semiconductor wafers, etc. It is used for complex shape or accurate shape processing, and it has the advantage that the shape does not change and can be maintained for a long time.

A conventional method for manufacturing such electrodeposited diamond wheels will be described with reference to FIGS. 6 to 8.

FIG. 6 is a view showing a method of manufacturing a conventional electrodeposited diamond tool, FIG. 7 is an enlarged view of the surface of the electrodeposited diamond tool manufactured by the method of manufacturing a conventional electrodeposited diamond tool, and FIG. It is a flowchart which shows the process of manufacturing the conventional electrodeposition diamond tool.

In Fig. 6, reference numeral 1 denotes a disc-shaped shank (diamond wheel body), and diamond particles (hereinafter referred to as grinding surfaces) are defined on a predetermined surface 11 (hereinafter referred to as a grinding surface) of the shank 1. Electrodeposited diamond wheel 100 electrodeposited 10) is commonly referred to as a diamond tool. Reference numeral 12 is a copper rod for fixing the shank 1 during electrodeposition of the diamond particles 10 on the shank 1, and reference numeral 14 denotes a chemical solution for chemicals (nickel sulfate, nickel chloride, boric acid solution). Reference numeral 16 denotes an electric wire, and reference numeral 18 denotes a tank. Typically, the diamond particles 10 have a size of 10 to 200 μm depending on the application.

The conventional method of manufacturing the electrodeposited diamond tool is as shown in FIG. 6, by standing the shank 1 vertically in the water tank 18, and supporting the lower part of the disk-shaped shank, such as a copper rod 12, the shank To keep it from moving. The diamond particles of the shank 1 are sprinkled on the surface to be electrodeposited, that is, the grinding surface 11 of the shank 1, and electroplated with nickel or the like for a predetermined time to fix the diamond particles firmly. Then, the shank 1 is rotated by a predetermined angle, and plating is performed on the unplated portion in the same manner as described above. In order to deposit the diamond grains on the disc-shaped shank 1 as a whole, the plating should be performed 6-10 times or more by the above-described method.

A method of manufacturing such a conventional electrodeposited diamond tool will be briefly described with reference to FIG. 8.

In step S11 of FIG. 8, the shank 1 having a predetermined shape is processed into a lathe or the like.

In step S12 of FIG. 8, after the shank 1 is placed vertically in the nickel electrodeposition plating tank to hold the shank stationary, the diamond particles are sprinkled on a part of the grinding surface 11 of the shank 1. Performs nickel electrodeposition plating

In step S13 of FIG. 8, it is judged whether the whole grinding surface 11 of the shank 1 performed nickel electrodeposition plating. When the entire grinding surface 11 of the shank 1 is subjected to nickel electrodeposition plating, a step of inspecting the profile (shape) of the diamond tool is performed.

On the other hand, in step S14 of FIG. 8, in the step S13, when the entire grinding surface 11 of the shank 1 is not subjected to nickel electrodeposition plating, the grinding surface of the shank 1 ( 11) After rotating and fixing the shank to plate the portion where the nickel electrodeposition plating has not been performed, the nickel electrodeposition plating is repeatedly performed in step S12 until the entire grinding surface of the shank is plated.

The conventional method for producing electrodeposited diamond tools has the following problems. First, the conventional electrodeposition method is partially carried out by repeatedly performing nickel plating, and thus divided into overlapped portions, non-plated portions, and portions that are normally plated, and these portions have different nickel plating layers, and thus, FIG. 7. As shown in the figure, since the nickel plating layer becomes non-uniform, it has an irregular profile of diamond particles. In other words, the diamond particles fixed on the overlapping portions of the diamond particles are fixed at a higher position than the diamond particles fixed on the portions where the normal plating is performed, so that the profile of the diamond particles is irregular.

Therefore, considering that the shape tolerance of the electrodeposited diamond tool is 0.03 mm, the defective rate is very high, and the nickel layer for fixing the diamond particles is irregular, so that not only the quality of the workpiece to be ground by the diamond tool is degraded, Due to the separation of particles, the life of the electrodeposited diamond tool is shortened.

The present invention provides a method for producing an electrodeposited diamond tool and a diamond tool produced by the method for supplementing or improving the above-mentioned problems and disadvantages.

That is, an object of the present invention is to provide a method for manufacturing a method for manufacturing an electrodeposited diamond tool that can easily perform the electrodeposition plating process of the diamond tool, and can significantly reduce the execution time of the electrodeposition plating process. .

In addition, another object of the present invention is to electrodeposit diamond particles evenly and uniformly in the production of electrodeposited diamond tools, so that the grinding surface of the workpiece maintains excellent grinding quality and reduces the defective rate of the workpiece.

In addition, the object of the present invention is to improve the life of the electrodeposited diamond tool by reducing the separation of the diamond particles in use by electrodepositing to a uniform thickness of the diamond particles in the electrodeposited diamond tool during manufacturing.

The method of manufacturing an electrodeposited diamond wheel according to an embodiment of the present invention includes the steps of manufacturing a shank of a predetermined shape, densely contacting the diamond particles on the grinding surface of the shank using a mesh network jig, and the diamond particles Nickel electrodeposition plating is performed to fix to the grinding surface of the shank. Preferably, the method for producing an electrodeposited diamond wheel of an embodiment of the present invention is characterized in that the nickel electrodeposition plating step performs nickel plating up to 5-10% of the diamond particle size in order to fix the diamond particles in contact with the grinding surface of the shank. Diamond particle size, after the first nickel electrodeposition plating step, after the first nickel electrodeposition plating step, to remove the mesh network, to recover excess diamond particles, and to securely fix the diamond particles fixed to the grinding surface of the shank A second nickel electrodeposition plating step is performed to carry out nickel plating up to 60% of the time.

According to another aspect of the present invention, there is provided a method of manufacturing an electrodeposited diamond wheel, the method comprising: manufacturing a shank of a predetermined shape, closely bonding diamond particles to a grinding surface of the shank using a mesh jig, In order to fix the contacted diamond particles, a first nickel electrodeposition plating step of performing nickel plating up to 5-10% of the diamond particle size, after the first nickel electrodeposition plating step, the mesh network is removed and excess diamond particles are recovered. And a second nickel electrodeposition plating step of performing nickel plating up to 60% of the diamond particle size to firmly fix the diamond particles fixed to the grinding surface of the shank.

Electrodeposited diamond wheel according to another embodiment of the present invention is characterized in that it is manufactured by the manufacturing method of the electrodeposited diamond wheel of claim 1 described above.

Electrode plating apparatus for a diamond wheel according to another embodiment of the present invention, for immersing in a chemical solution of the chemical solution, the electrode for nickel electrodepositing the diamond wheel in the aqueous solution

Including a water tank, a nickel plate, and a rectifier,

Disc-shaped shank for producing electrodeposited diamond wheel, slightly larger than the diameter of the shank to arrange the shank, disc-shaped backlight plate, after placing the shank, is attached to the side of the backlight plate It extends higher than the height of the shank and includes a mesh net for densely retaining diamond particles of a predetermined size between the grinding surface of the shank. In the electrodeposition plating apparatus of the diamond wheel which is another embodiment of the present invention, it is preferable that the mesh network has elasticity and has a mesh scale smaller than predetermined diamond particles.

(Example)

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.

1 is a view showing a perspective view of an electrodeposited diamond wheel, Figure 2 is a view showing an electrodeposition plating apparatus and process of the electrodeposited diamond wheel, Figure 3 illustrates a mesh used in the manufacturing process of the electrodeposited diamond wheel of the present invention. 4 is an enlarged view of the surface profile of the electrodeposited diamond tool manufactured by the method for manufacturing the electrodeposited diamond tool of the present invention, and FIG. 5 is a diagram showing the manufacture of the electrodeposited diamond wheel according to the present invention. A flowchart illustrating the method.

As shown in FIG. 1, the electrodeposited diamond wheel 100 used for polishing the ferrite magnet of the present invention is manufactured by electrodepositing and fixing diamond particles on the grinding surface 110 of the shank 1.

The shank 1 is disk shaped of metal and is typically 250 mm in diameter. This shank 1 is attached to the grinding surface 11 on which the ferrite magnet is to be ground by attaching diamond particles (or diamond particles) by a nickel plating electrodeposition method. Here, the size of the diamond particles is used 100 to 200 ㎛ depending on the surface precision of the workpiece, that is, the ferrite magnet. The electrodeposition plating of diamond grains on the shank 1 is generally referred to as an electrodeposition diamond wheel 100. This electrodeposited diamond wheel is fixed to a grinding machine (not shown) to grind the surface of the ferrite magnet.

As described later in FIG. 2, the diamond particles are fixed to the grinding surface 11 of the shank 1 by an electro-plating method of Ni.

As shown in the right side of FIG. 4, the shape tolerance of this electrodeposition diamond wheel 100 is 0.03. For example R29.5 + 0.03. That is, the R value must be within 29.50 to 29.53.

Next, the manufacturing method of the electrodeposition diamond wheel of this invention is demonstrated in detail. In Fig. 2, reference numeral 1 denotes a shank, and reference numeral 2 is a disk plate for placing the shank, which is made slightly larger than the diameter of the disk. Reference numeral 3 denotes a mesh network having a predetermined elasticity, for example, a product such as polyester, and the mesh network may be selected according to the size of the diamond grains, and the size of the scale may be It can be attached and attached on the side of the light plate (2), not only serves to prevent the dispersion of the diamond particles 10, but also to closely adhere the diamond particles to the shank (1). As shown in FIG. 2, a sufficient number of diamond particles 10 in the entire grinding surface 11 of the shank 1 are densely arranged on the grinding surface 11 by a mesh net. In FIG. 2, the front view of the Ni electrodeposition plating apparatus is shown. However, since the shank 1 has a disk shape and the backlight plate 2 is a disk shape slightly larger than the diameter of the shank, the mesh net 3 is a disk shaped bag. It is glued circularly along the side of the light plate and is generally cylindrical. Densely fill diamond particles of a predetermined size between the grinding surface of the discoid shank and the cylindrical mesh network.

Reference numeral 4 is an aqueous chemical solution as in the prior art, for example, nickel sulfate, nickel chloride, boric acid aqueous solution, 6 is a nickel plate, and 8 is a water bath. Reference numeral 20 is a rectifier in the electrodeposition plating process of diamond grains. In the present invention and the prior art, the current of the rectifier is determined according to the cross-sectional area of the grinding surface of the shank, the plating time, the size of the diamond particles, and the like.

After filling a large number of diamond particles much larger than the number to be electrodeposited between the shank and the mesh net jig, they are placed in a bath 8 containing an aqueous chemical solution 4, and the rectifier 20 on a nickel plate 6. By supplying electricity through), nickel is plated on the grinding surface 11 of the shank 1. As the nickel is plated, the diamond particles in contact with the grinding surface are fixed to the grinding surface of the shank.

It is preferable that a nickel electrodeposition plating process consists of two steps. The first nickel electrodeposition plating process is a step of attaching diamond particles to the grinding surface of the shank, plating about 5 to 10% of the diamond particle size, so that only the diamond particles adhered to the grinding surface are fixed.

Upon completion of the first electrodeposition plating process, the mesh net is removed and diamond particles not attached to the grinding surface of the shank are recovered. The recovered diamond particles are used again when manufacturing another electrodeposited diamond wheel 100. Thus, at first glance, it can be considered that the particles used in the present invention are used in much larger amounts than the conventional methods, but diamond particles not attached to the grinding surface of the shank are recovered to produce another electrodeposited diamond wheel. By using it, it can be seen that the number of particles used is almost the same as the conventional method.

Next, a second nickel electrodeposition plating step is performed. This second nickel electrodeposition plating process is an additional plating process for firmly attaching the diamond particles to the grinding surface, and proceeds to about 60% of the diamond particle size. By performing this second nickel electrodeposition plating process, it is possible to effectively prevent the detachment of diamond particles while the diamond tool polishes the workpiece, thereby significantly improving the life of the electrodeposited diamond tool.

4 is a cross-sectional view of the electrodeposited diamond wheel 100 completed through the nickel electrodeposition plating process described above. 4 shows a profile in which diamond particles are uniformly fixed to the grinding surface of the shank 1 by plating, and it can be seen that the diamond particles are significantly improved as compared with FIG.

5, a brief summary of the method of manufacturing the electrodeposited diamond wheel 100 is shown.

5 is a flowchart illustrating a method of manufacturing an electrodeposited diamond wheel according to the present invention.

In step S1 of FIG. 5, the shank 1 of the type suitable for the grinding machine is manufactured. The size and shape of the shank 1 may vary depending on the grinding machine and the workpiece.

In step S2 of FIG. 5, the diamond particles are closely adhered to the grinding surface 11 of the shank 1 by using a mesh network. Many diamond particles can be kept more dense and closer.

In step S3 of FIG. 5, as the first nickel electrodeposition plating step for fixing the diamond particles in contact with the grinding surface of the shank, about 5-10% of the diamond particle size is nickel plated.

In step S4 of FIG. 5, as a step of removing the mesh net jig and recovering the extra diamond particles, the recovered diamond particles are used in the manufacture of another electrodeposited diamond wheel.

In step S5 of FIG. 5, as a second nickel electrodeposition plating process for firmly fixing diamond particles fixed to the grinding surface of the shank, nickel plating is performed to about 60% of the diamond particle size.

Thereafter, the profile (shape) of the completed electrodeposited diamond wheel is inspected to see if the profile (shape) of the diamond particles falls within the above-described shape tolerance range (ie, R29.50 to R29.53).

According to the manufacturing method of the electrodeposited diamond wheel according to the embodiment of the present invention, the nickel electrodeposition plating process of the diamond particles on the predetermined surface of the shank is carried out in one batch over the entire disc shape, so that the nickel electrodeposition plating time can be significantly reduced. Productivity can be improved significantly.

According to the manufacturing method of the electrodeposited diamond wheel according to the embodiment of the present invention, the electrodeposition plating process of the diamond particles on a predetermined surface of the disc-shaped shank is performed at a time, so that the nickel layer is uniformly plated so that the defective rate of the electrodeposited diamond wheel is almost 0%. This leads to.

According to the manufacturing method of the electrodeposited diamond wheel according to the embodiment of the present invention, by adhering the diamond particles to the shank by the mesh network, the number of diamond particles attached to the grinding surface of the shank increases, that is, the concentration of the diamond particles is increased. It can increase.

According to the manufacturing method of the electrodeposited diamond wheel according to the embodiment of the present invention, since the diamond particles are uniformly arranged on the grinding surface of the electrodeposited diamond wheel and have a high concentration, the Ni plating for fixing the diamond particles is made uniform. The life of the diamond tool is significantly improved.

Embodiments of the present invention are illustrated by way of example and easy to understand the present invention, it should be recognized that not intended to limit the scope of the present invention, it is common in the art with reference to the specification and drawings of the present invention It should be construed to include embodiments that may be modified by those skilled in the art.

1 shows a perspective view of an electrodeposited diamond wheel;

2 is a view showing an electrodeposition plating apparatus and a process of an electrodeposition diamond wheel,

3 exemplarily shows a mesh used in the manufacturing process of the electrodeposited diamond wheel of the present invention;

4 is an enlarged view of the surface of the electrodeposited diamond wheel manufactured by the method of manufacturing the electrodeposited diamond tool of the present invention;

5 is a flowchart illustrating a method of manufacturing an electrodeposited diamond wheel according to the present invention;

6 is a view showing a method for manufacturing a conventional electrodeposited diamond wheel,

7 is an enlarged view of a surface of an electrodeposited diamond tool manufactured by a method of manufacturing a conventional electrodeposited diamond wheel;

8 is a flowchart illustrating a process of manufacturing a conventional electrodeposited diamond wheel.

<Explanation of symbols for the main parts of the drawings>

1: shank (or diamond wheel body) 2: backlight plate

3: mesh network 4: chemical solution

6: nickel plate 8: water tank

11: grinding surface 20: rectifier

100: electrodeposited diamond wheel

Claims (6)

Manufacturing a shank having a disk shape and having a semicircular concave grinding surface on a circumferential surface, Prepare a disk-shaped bakelite plate having a diameter slightly larger than the diameter of the shank, and on the side of the bakelite plate, a mesh mesh jig that is elastic to extend vertically slightly higher than the height of the shank lying down. Attaching, Placing the bakelite plate in a plating tank, placing a shank in the center on the bakelite plate, inserting a large number of diamond particles between the elastic mesh net jig and the grinding surface of the shank sufficiently densely Contact step, A first nickel electrodeposition plating step of performing nickel plating up to 5-10% of the diamond particle size to fix only the particles of the plurality of diamond particles in contact with the grinding surface of the shank, to the grinding surface of the shank, After the first nickel electrodeposition plating step, removing the mesh net and recovering excess diamond particles; and A second nickel electrodeposition plating step of performing nickel plating up to 60% of the size of the diamond particles attached to the grinding surface to securely fix the diamond particles fixed to the grinding surface of the shank. Method for producing an electrodeposition diamond wheel, characterized in that consisting of. delete delete The electrodeposited diamond wheel manufactured by the manufacturing method of the electrodeposited diamond wheel of Claim 1. In the electrodeposition plating apparatus of the diamond wheel containing an aqueous chemical solution, comprising a bath, a nickel plate, and a rectifier for nickel electrodeposition of the diamond wheel in the aqueous solution, Shank having a disk-shaped, semi-circular grinding surface concave on the circumferential surface, A disc shaped backlight plate slightly larger than the diameter of the shank for arranging the shank, and It is attached to the side of the bakelite plate and extends vertically higher than the height of the shank, and dense while a plurality of diamond particles of a predetermined size are electrodeposited on the grinding surface of the shank in part with the grinding surface of the shank. Mesh jig with elasticity to keep it secure Electrodeposition plating apparatus of the diamond wheel comprising a. The electrodeposition plating apparatus for a diamond wheel according to claim 5, wherein the mesh net jig has a smaller mesh scale than the diamond particles.