JP2001232569A - Electrodeposition tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding and fixing structure for abrasive of an electrodeposition tool preventing the drop of abrasive and having excellent durability. SOLUTION: In this electrodeposition tool composed of a structure in which abrasives adhere on a surface of a tool shaft member and are held and fixed by an electrodeposited metal, electroless plating is applied to exposed faces of the abrasives and the surface of the shaft member integrally after attaching the abrasives to the surface of the shaft member by the electrodeposited metal temporarily to electrodeposit and fix the abrasives on the shaft member through an electroless-plated film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an electrodeposition tool,
More specifically, the present invention relates to a structure for holding and fixing abrasive grains of an electroplated tool, which is hard to fall off and has excellent durability.

[0002]

2. Description of the Related Art An electrodeposition tool is a tool in which abrasive grains adhered around a shaft are buried and fixed around the shaft with an electrodeposited metal. At least 50% of the abrasive particles are buried in the electrodeposited metal, and the tip is exposed and used. Since the abrasive grains of the electrodeposition tool are merely embedded and physically held and fixed in the electrodeposited metal, there is a disadvantage that the abrasive grains are easily dropped. The key to increasing the holding power of the abrasive grains is how to increase the contact area at the interface between the abrasive grains and the electrodeposited metal. In the current electrodeposition tool, the state of the interface between the electrodeposited metal and the abrasive grains is as shown in FIG. 2, and a gap is formed in a portion indicated by an arrow.
The formation of this gap is a major cause of the abrasive grains falling off.
In order to prevent dropping, the gap between the arrow parts is eliminated and FIG.
However, no solution has been found to date.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and can prevent the above-mentioned gap from occurring during electrodeposition plating, and can make the electrodeposited metal adhere to the abrasive grains without any gap. It is intended to provide an electrodeposition tool having a new structure.

[0004]

Means for Solving the Problems The present inventors have made intensive studies on the above problems and have obtained the following findings. That is, in the electrodeposition tool, after the abrasive grains are temporarily attached to the surface of the shaft material with an electrodeposited metal, the exposed surface of the abrasive grains and the surface of the shaft material are integrally coated with an electroless plating film. When the abrasive grains are electrodeposited on the shaft through the film, no gap is created between the abrasive grains and the electrodeposited metal. The most preferred electroless plating film is nickel-based electroless plating. Most preferably, the thickness of the electroless plating film is 0.001 to 50 μm. The above findings were obtained. The present invention has been made based on the above findings.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, abrasive grains of an electrodeposition tool according to the present invention are prepared by temporarily attaching the abrasive grains to the surface of a shaft with an electrodeposited metal, and then removing the tacked portion. The entire exposed surface of the abrasive grains and the surface of the shaft member are integrally covered with an electroless plating film 1 without any gap, and this electroless plating film is bonded to the electrodeposited metal 2. When the abrasive grains are fixed by electrodeposition, since the electrodeposited metal grows evenly from the electroless plating film, no gap is created between the abrasive grains and the electrodeposited metal, and the abrasive grains are wrapped with the electrodeposited metal. Will be fixed so that In addition, the gaps are eliminated, the contact area is increased, and the plated metal enters the entire surface of the uneven surface of the abrasive grains, and a strong anchoring effect is exhibited, so that the abrasive grains do not fall off and the durability is greatly improved.

Electrodeposited abrasive grains include diamond, BN, Si
C, WC, SiO2, graphite, SiN, SiC-
Cu, SiC-Al, and all other abrasive grains can be used regardless of particle size.

As the electroless plating, nickel-based, copper-based, and cobalt-based plating are effective, and particularly, nickel-based electroless plating, for example, Ni-B-based or Ni-P-based plating is preferable. The plating thickness is preferably 0.001 to 50 μm.
In order to obtain a structure having no gap as shown in FIG. 1, the plating thickness needs to be 0.001 μm or more. If the plating thickness exceeds the upper limit, cracks may occur in the plating film during processing and abrasive grains may fall off, which is not preferable.

In the present invention, since the entire exposed surface of the abrasive grain except the temporarily attached portion is electroless-plated, when the electrode is fixed to the shaft material, the entire abrasive grain projection is covered with the electrodeposited metal. Therefore, at the time of use, the electrodeposited metal covering the protruding portion is dressed and removed as necessary, exposing the abrasive grains.

As the electrodeposited metal for tacking and fixing, nickel, cobalt, iron-based metals and the like can be appropriately used, and most preferably, nickel-based metals are used.

After the abrasive grains are temporarily attached to a base material (shaft material) by a seed plating method, the periphery of the abrasive grains is filled with an electrodeposited metal and fixed. As seed plating, abrasive grains are suspended and dispersed in a plating solution and co-deposited with the plating solution, or the abrasive grains are placed in a porous container, submerged in an electroplating solution, and the shaft material is placed in the abrasive grains. Any of the methods used for this type of application, such as a method of inserting and filling an electrode and electroplating and seeding the shaft with an electrodeposited metal, can be adopted.

[0011]

Example 1 (Electrodeposited diamond drill) Abrasive grains: Diamond abrasive grains with a particle size of 100 mesh [Seeding plating] Diamond abrasive grains are put in a porous crucible made of glass fiber and immersed in a Ni plating solution having the following composition. Then, an iron shaft having a diameter of 10 mm was inserted into the abrasive grains and electroplated at a current density of 0.2 A / dm ² for 30 minutes. Composition of seed plating solution Nickel sulfate 240 g / l, nickel chloride 40 g / l,
Boric acid 40 g / l, PH 4.2, bath temperature 55 ° C. Next, the shaft material seeded with diamond abrasive grains is pulled up from the plating solution, and excess abrasive grains are dropped with a brush.
The shaft and the exposed surface of the abrasive grains were integrally electrolessly plated. [Electroless plating] After performing degreasing, sensitizing treatment and activator treatment by a known method, Ni-B is applied to the surface of the shaft member and the abrasive grains with a concentration of approximately 0.2 μm using an electroless plating solution having the following composition. Electroless plating was performed. Composition of electroless Ni-B plating solution Nickel sulfate 30 g / l, boric acid 30 g / l, ammonium chloride 30 g / l, Rossel salt 30 g / l, dimethylamine borane 3 g / l, PH 5.5, bath temperature 60 ° C [meat Electroplating for filling] Next, a current density of 0.5 A / dm was applied on the electroless plating film using a Ni plating solution having the following composition.
² for 2 hours, Ni was built up around the abrasive grains, and the abrasive grains were fixed to the shaft. Composition of overlaying electroplating solution Nickel sulfate 240g / l, nickel chloride 45g / l,
Boric acid 40 g / l, stress reducing agent (manufactured by World Metal Corporation:
(Zeroall) 20 ml / l, PH 4.2, bath temperature 55 ° C. The surroundings of the abrasive grains were overlaid with Ni without gaps, and the protrusions of the abrasive grains were also coated with Ni. Evaluation Test After the Ni coated on the protruding portions of the abrasive grains was removed by dressing, the performance was evaluated by polishing alumina ceramics. A total of 800 hours could be used without the abrasive particles falling off. On the other hand, in the case of the conventional tool, the abrasive grains fell off in a total of 70 hours, and became unusable. It was confirmed that the structure of the present invention has a remarkable effect in preventing the abrasive grains from falling off and improving the durability.

Example 2 (BN electrodeposition drill) Abrasive grains: CBN abrasive grains having a particle size of 80 mesh [Seeding plating] A 10 mm diameter Ni plating solution having the following composition in which 5 wt% of BN abrasive grains were suspended and dispersed was used. A stainless steel shaft was used, and a current density of 0.2 A / dm ²
Plated for 0 minutes. Composition of seed plating solution Nickel sulfamate 400g / l, Nickel chloride 1
0 g / l, boric acid 40 g / l, PH 4.0, temperature 60 ° C. Next, the shaft was seeded, pulled up from the plating solution, and the extra-adhered abrasive grains were washed and dropped. Electroless plating was performed. [Electroless Plating] A shaft material seeded with abrasive grains is subjected to degreasing, a sensitizer, and an activator treatment in the same manner as in Example 1, and then Ni-P is reduced to 0 using an electroless Ni-P plating solution having the following composition. .05μ
m electroless plating. Composition of electroless Ni-P plating solution Nickel sulfate 20 g / l, sodium citrate 30 g /
1, sodium hypophosphite 15 g / l, PH 8.9, bath temperature 40 ° C. [Electroplating for cladding] Next, on the electroless plating film, a Ni plating solution having the following composition was used to obtain a current density of 0.1. 5A / dm
² for 2 hours, Ni was built up around the abrasive grains, and the abrasive grains were fixed to the shaft. Composition of overlaying electroplating solution Nickel sulfamate 400g / l, nickel chloride 2
0 g / l, boric acid 40 g / l, stress reducing agent (World Metal Co., Ltd .: Zerool) 20 ml / l, PH 4.0, bath temperature 60 ° C. The portion was also overlaid with Ni. N coated on protruding part of abrasive grains
After dressing and removing i, it was used for polishing a cemented carbide to evaluate its performance. A total of 700 hours could be used without abrasive particles falling off. On the other hand, a total of 2
At 0 hours, the abrasive grains fell off and became unusable. It was confirmed that the structure of the present invention has a remarkable effect in preventing the abrasive grains from falling off and improving the durability.

[0013]

As described in detail above, the present invention has a remarkable effect in preventing the abrasive grains from dropping out of the electrodeposited tool, and makes a great contribution to the improvement of the durability and quality of the tool.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an electrodeposition structure of a tool according to the present invention.

FIG. 2 is a diagram illustrating an electrodeposition structure of a conventional tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Shaft material 2 ... Abrasive grain 3 ... Electrodeposited metal 4 ... Electroless plating layer

Claims (3)

[Claims] 1. An electrodeposited tool having a structure in which abrasive grains are adhered to the surface of a tool shaft and held and fixed with an electrodeposited metal, after the abrasive grains are temporarily attached to the surface of the shaft with an electrodeposited metal. An electrodeposited tool, wherein an exposed surface of the abrasive grains and a shaft material surface are integrally electrolessly plated, and the abrasive grains are electrodeposited and fixed to the shaft material via the electroless plating film. . 2. The electrodeposition tool according to claim 1, wherein said electroless plating is nickel-based electroless plating. 3. The method according to claim 1, wherein said electroless plating film has a thickness of 0.001 to 0.001.
3. The electrodeposited tool according to claim 1, which has a thickness of 50 μm.