WO1986000252A1

WO1986000252A1 - Method for electrodeposition of metal and granular abrasive on a tool

Info

Publication number: WO1986000252A1
Application number: PCT/JP1984/000517
Authority: WO
Inventors: Masatoshi Funakubo; Naomi Yoshihara
Original assignee: Funasaw Co., Ltd.
Priority date: 1984-06-25
Filing date: 1984-10-29
Publication date: 1986-01-16
Also published as: EP0185091A4; JPS619600A; EP0185091A1

Abstract

A method in which a granular abrasive, together with a deposited metal, is deposited on a base metal for an electrodeposition on a tool by electroplating. A cathode chamber (4) is provided in an electrolytic tank (1) in such a manner that a portion of the cathode chamber (4) projects beyond the anolyte surface Sa. A granular abrasive layer (8) is formed on the bottom of the cathode chamber (4). A portion of an anolyte in an anode chamber (7) is circularly poured into the cathode chamber (4) from the upper side thereof such that a head difference (Sc-Sa) is formed between the catholyte surface Sc and the anolyte surface Sa, whereby such plating conditions as the pH of the catholyte and the metal concentration are controlled such that the granular abrasive (8) is deposited on a base metal (3) without diffusing the granular abrasive layer (8). The method is suitably employed to manufacture an electrodeposition plated tool in such a manner that a granular abrasive, such as diamond, cubic boron nitride or fine ceramic is deposited on a base metal for various grinding, polishing or cutting tools, together with a metal, such as nickel or copper.

Description

Description Electroplated tool manufacturing method Technical field

The present invention relates to a method for manufacturing an electrodeposited tool, and more particularly to a method for eutectoidally fixing abrasive grains together with a precipitated metal onto a base metal of an electrodeposited tool by an electric tool.

Background art

Conventionally, this type of electrodeposition tool has been mainly manufactured by the following method (Japanese Patent Laid-Open No. 58-66668, Japan).

(A) A method in which the abrasive grains are suspended while suspending the abrasive grains in the liquid and the plating solution, and the abrasive grains are prayed together with the metal.

(B) a method of performing electrodeposition while suspending abrasive grains that have been previously subjected to chemical magic in a mechanical liquid, and causing the abrasive grains to pray together;

(C) A method in which abrasive grains are bonded to a base metal in advance using an adhesive, and a base treatment using a chemical plating is performed or not, and further, an electric plating is used to fix it.

In addition, the electrolytic cell used for the production of electrodeposition tools is usually immersed in the cathode (metal) and the anode without specially partitioning the electric plating bath contained in the bath. It has a configuration in which adhesion is performed while stirring with an impeller provided inside.

However, in the method (A), it is extremely difficult to adjust the compounding ratio of the abrasive grains, and in the method (B), the adhesion and bonding force of the abrasive grains are insufficient.

OMPI In addition, the method (C) has disadvantages such as a decrease in the adhesive strength of the abrasive grains. Therefore, these conventional methods require the abrasive grains to be uniformly and firmly fixed on the base metal under stable operating conditions. Was difficult.

The present invention solves the above-mentioned disadvantages of the prior art, and in particular, stabilizes plating conditions such as PH and metal concentration in an electric plating bath, thereby improving the plating metal efficiency. The amount of co-folding of the abrasive grains can be controlled to a fixed amount, and the abrasive grains used as a work-in-progress can be fixed to the minimum while maintaining the minimum necessary. It is an object of the present invention to provide a method capable of producing an electrodeposited tool capable of fully exhibiting functions of various tools such as shearing property with high efficiency, economically and continuously.

Disclosure of the invention

In order to achieve such an object, the present inventors have made intensive studies on the production of an electrodeposition tool, and as a result, installed a cathode chamber of a specific configuration in an air plating bath, and a part of the anolyte was transferred to the cathode chamber. It was found that this could be achieved by circulating the solution into the bath and keeping the catholyte level slightly higher than the anolyte level. '

That is, in the present invention, a tool base having a predetermined shape of a metal resist is immersed in an electric plating bath to which abrasive grains have been added, and the abrasive grains together with a prayer metal are used as the tool base. In the above method, a cathode chamber is provided in the electric plating bath so as to partially protrude from the liquid level, and a part of the anolyte is circulated and injected into the cathode chamber from above. A method of manufacturing an electrodeposited tool, characterized by fixing the abrasive grains on the tool base by performing electrodeposition while maintaining the abrasive grains at the bottom.

ΟΜΡΙ It is said that.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an explanatory view schematically showing an example of an electrolytic cell used in the method of the present invention,

FIG. 2 is a perspective view illustrating the assembly of the cathode chamber in the electrolytic cell shown in FIG. 1,

FIG. 3 is a new surface view of the cutting edge portion of the band saw blade after completion of the attachment and attachment of the abrasive grains in the embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

10 Hereinafter, the present invention will be described in detail with reference to the drawings.

The electrolytic cell used in the method of the present invention is provided with a cathode chamber partly protruding from the liquid level in an electric plating bath, and circulating a part of the anolyte into the cathode chamber from above. The structure is such that the liquid in the catholyte compartment is replaced by the catholyte surface being higher than the anolyte surface (head difference) and i5 is refluxed to the anolyte compartment.

FIG. 1 is a schematic explanatory view showing the outline of an electrolytic cell used in the method of the present invention. In the figure, 丄 is an electrolytic cell, which is composed of an anode chamber 7 and a cathode chamber 4, in which an anode metal plate 2 is arranged at the bottom, while a tool base 3 as a cathode is shaded.配 Powered in room 4

Connected to 20 1 1. Further, a conduit 1 ′ ′ is provided on one side wall of the electrolytic cell 1, and an injection pipe 10 is connected to the conduit 1 ′ via a pump 9 made of a material which is not subject to electrolytic corrosion, so that a part of the anolyte is removed. The liquid is sucked up by the pump 9 and introduced into the injection pipe 10, and injected from the many pores or narrow slits provided in the injection pipe into the cathode electrode chamber 4 over the entire surface.

O PI, 0 The conduit 10 ′ and the injection pipe 10 may be made of an acid-resistant pipe, and a filter may be connected in series with the pump 9.

The metal plate 2 of the anode is set at a position corresponding to the cathode surface to which the abrasive grains are to be fixed, such as the left and right surfaces or the bottom surface or both sides of the metal plate, according to the shape of the metal plate of the mounting tool to be manufactured. Cut. At this time, in order to prevent the sludge generated from the metal plate 2 of the anode from diffusing into the solution, the metal plate 2 is wrapped in advance with a suitable mesh cross 2 '. It is desirable to get a copy.

On the other hand, as shown in FIG. 2, the cathode chamber 4 is provided with a tetrone or polyethylene inside or outside a frame 5 which is appropriately assembled from wood, plastic sock, or the like. Filter cloth or filter paper (hereinafter collectively referred to as “cross”), which is made of an acid-resistant cloth or paper, etc., and distributes microscopic gaps over the entire surface to the extent that the abrasive grains contained inside do not pass through. ) Is in close contact. Abrasive grains are formed at the bottom of the cathode chamber to form an abrasive layer 8. The height of the abrasive layer 8 is controlled by a layer 3 ′ for fixing the abrasive grains of the base metal 3, ie, masking. Abrasive grains are introduced so as to form a layer that is slightly higher than the portion 3 ′ that is not formed, and the portion where the abrasive grains are desired to be fixed is completely buried in the abrasive layer 8.

In the case of continuously processing the long base metal 3, it is necessary to provide a loading / unloading port for the base metal 3 on the side wall of the cathode chamber 4, and to install a grain filling device at an appropriate place. Of course.

In the operation of the electrolytic cell having such a configuration, a part of the anolyte is injected into the cathode chamber 4 from above from the injection pipe 10 into the cathode chamber 4 by the pump 9 as described above. Recover the liquid in the cathode chamber through cathode chamber cross 6. o

Then, it is refluxed to the anode chamber 7. This injection amount is used to suppress the pH rise in the cathode chamber so that the pH of the solution in the cathode chamber is maintained at a PH value appropriate for the present invention (for example, 2 to 4), and to control the abrasive layer at the bottom of the cathode chamber. It is desirable to control 8 so that it does not spread. In order to reliably prevent the diffusion of the abrasive layer, it is preferable to inject the anolyte from the pores or slits of the injection pipe 10 in a shower shape. In this case, even if the injection amount is large, a part of the injection amount overflows from the upper edge of the cathode chamber and returns to the anode chamber again, but the abrasive layer is not diffused. This makes it easy to control the PH in the cathode chamber by adjusting the pH.

When the anolyte is partially circulated, the liquid level Sc in the cathode chamber is slightly higher than the liquid level Sa in the anode chamber 7 due to the resistance of the cross 6 (for example, 5 ~ 10 mm). As a result, most of the anolyte injected into the cathode chamber is replaced by the liquid in the cathode chamber due to the head difference (S c−S a), and is lower than the injected anolyte ρ Η. Reflux into the anode chamber 7 as a solution with high ρ--For this reason, the 管理の in the cathode chamber is always maintained in this way by simply performing the same anolyte solution management as in normal plating work. Appropriate conditions can be maintained. In other words, as described above, since the cathode chamber uses a cross in which the minute gaps are distributed over the entire surface, if there is no reflux of the anolyte, the permeation in the paint is insufficient. In this case, since the metal ion corresponding to the metal praying to the cathode is not supplied from the anolyte, the concentration of the metal ion in the cathode chamber decreases and ρ Η Rises, making it impossible to maintain proper plating conditions or causing variations. Especially abrasive This tendency is remarkable as the particle size becomes finer. In some cases, a basic salt may be generated on the cathode surface, and the metal deposition itself may be completely stopped.

However, if the anolyte is refluxed as in the method of the present invention, the above-mentioned problem is completely solved, and even when fine abrasive grains are used, uniform and normal electrodeposition can be performed, and thus, satisfactory results can be obtained. You can get the results you need.

Example

Next, an embodiment of the method of the present invention will be described. Note that the present embodiment relates to the manufacture of a band saw blade having a diamond layer at the cutting edge, but various types such as diamond, cubic boron nitride, fine ceramics, etc. It goes without saying that the present invention can be applied to the case where other various tools are manufactured using the same abrasive grain.

In this example, a band saw blade was manufactured by the following steps using the electrolytic cell shown in FIGS.

M After processing a metal material such as charcoal steel or stainless steel, which has a certain hardness, into the shape and hardness of the tool to be manufactured, the surface is polished with a buff or the like to form a base metal.

? Mask the areas where electrodeposition of the abrasive grains is not necessary using a resist ink for plating in the usual way.

Subsequently, in the same manner as in the normal plating pretreatment, electrolytic finger removal or chemical finger removal is performed, and further, pickling is performed. When the material is stainless steel, the activation treatment is performed by electrolysis or acid pickling.

Underground plating is performed under the following conditions. Note that this is necessary

OMPI

― · ■ ^ ― May be omitted and omitted.

Electrolyte salt 100-200 g / H

Nickel chloride 200-300 g / β

Electrolysis conditions ^ ππ.

Cathode current density 3 to 20 A / dm

1-5 minutes

直ちに Immediately wash with acid and water.

B) Under the following conditions, a large amount of composite medium with abrasive grains fixed is performed. First, a required amount of diamond abrasive particles, which have been hydrophilized by boiling water treatment or the like, are introduced into the cathode chamber in a required amount, and the base metal to which the abrasive particles are to be fixed is completely formed in the abrasive layer. Try to fill it. Next, the required amount of the plating solution having the following bath composition is charged into the cathode chamber and the cathode chamber of the electrolytic cell, and heated to an appropriate temperature. Then, a part of the anolyte is pumped through an injection pipe. Inject the entire surface into the cathode chamber in a shaping manner.

Bath composition Nickel sulfate 24Q-320 g / 5

Nickel chloride 45 to 90 g / &

Boric acid 30 to 80 g / β

light

Electrolysis conditions dm 30 to 70 ° C

P H 2.0 to 4.5

Cathode current density 1 to 12 A / dm ²

Electrolysis time about 30 to 90 minutes

Finishing electrolysis: The base metal that has undergone co-praying electrolysis for fixing the abrasive is

OMPI The final electrodeposition is carried out in the same electrode bath with the same composition as in the above (1) and the same electrolysis bath and electrolysis conditions in the entire cathode chamber or in the same electrode tank from which the abrasive grains have been removed from the cathode chamber, or in an electrolytic tank prepared separately. The electrolysis time in this case varies greatly depending on the grain size of the abrasive grains, but depending on the application, etc., the coverage of the abrasive grains by the plated metal is about 60 to 90%. Determine the time and perform electrolysis.

台 The base metal after completion of the electrolysis is immediately washed with water and dried. If hydrogen embrittlement due to the trace amount of hydrogen absorbed by the metal plating is particularly problematic, 200 Heat treatment at about ° C for about 4 hours.

場合 If any resist ink remains on the base metal, remove it and, if necessary, clean it with thinner, etc., to completely remove the resist ink.

· ® When post-processing (end processing in the case of a band saw blade) is required as a tool, perform the required post-processing to produce a product. In addition, the process! ; Cutting edge of the band saw sword obtained complete After the completion of, Remind as to the ^_ 3 Figure, via a two-Tsu Kell main star key layer 1 2 basolateral except masked portion 1 3 of the base metal 3 As a result, the diamond grains _ 8 were uniformly hardened, which was good. .

As described in detail below, the present invention particularly provides a cathode chamber of a specific configuration in an electric plating bath, and circulates a part of the anolyte into the cathode chamber from above and supplies it to the bottom. Since the abrasive grains are maintained without diffusing, it is possible to stabilize and control the plating conditions such as PH and metal concentration in the cathode chamber. The amount of grain prayer can be controlled to a fixed amount, and grinding on the base metal

O PI Grain sticking can be achieved uniformly and evenly. Also, unlike the conventional method, there is no need to agitate the abrasive grains to distribute them uniformly in the plating bath. Instead, the abrasive grains are simply introduced into the chamber and a fixed height is set at the bottom thereof. The layer is automatically maintained in a layered state, and the same effect as agitation is exerted by the reflux of the liquid between the layers, stabilizing the plating conditions in the cathode chamber. In addition to contributing, it is economical because only the necessary minimum amount of abrasive grains needs to be prepared. Furthermore, since the operating conditions can be controlled and stabilized, it is possible to provide an optimal method for manufacturing an electrodeposited tool, for example, enabling an electrodeposited tool to be manufactured intermittently. And can be.

Industrial applicability

As described above, the method for manufacturing an electrodeposited tool according to the present invention includes the use of a diamond, a cubic boron nitride, and a fin as a base for various tools such as grinding, polishing, and cutting. Abrasives such as ramix are fixed together with nickel, copper, and other metals, and are suitable for electrodeposition to produce shine.

Is

, ^ WIPO ¾ν

Claims

The scope of the claims

(1) A tool base having a predetermined shape of a metal resist is immersed in an electric plating bath to which abrasive grains have been added, and the recharged grains are fixed together with the deposited metal on the tool base. In this method, a catholyte chamber is provided specially in the electromechanical bath so as to partially protrude from the liquid level, and a part of the anolyte is circulated and injected into the catholyte chamber from above and the abrasive is provided on the bottom. A method for manufacturing an electrodeposited tool, characterized by fixing abrasive grains on the tool base by attaching while maintaining the grains.

2. The method according to claim 1, wherein the cathode chamber is in close contact with a frame with a cloth or paper in which ultrafine gaps are distributed over the entire surface such that abrasive grains contained therein do not pass through.

3. The method according to claim 2, wherein the cloth or paper is an acid-resistant cloth or paper.

4. The method according to claim 1, wherein the height of the layer of the visiting abrasive grains is at least larger than the height of the portion of the tool base to which the abrasive grains are to be fixed.

The method according to claim 1, wherein a part of the anolyte is injected into the cathode chamber from above in a rechargeable manner.

6. The method according to claim 5, wherein a part of the anolyte is injected through pores of an injection pipe provided above the cathode chamber.

7. The method according to claim 1, wherein a part of the aqueous solution is circulated to the cathode chamber through a pipe by a pump. Method.

OMPI WIPO ^