JPS59107860A - Disk for diamond cutter and manufacturing method thereof - Google Patents

Abstract

PURPOSE:To restrict vibration and reduce noise by a method wherein a metal or an alloy, having a Young's modulus lower than a steel plate, is employed as one of intermediate layers to connect them to respective steel plates metallurgically in the disk consisting of a plurality of steel plates bonded through the intermediate layers. CONSTITUTION:The disk 10 for the diamond cutter is provided with many notches at the circumference thereof and blades 14 are attached to the circumferential surface thereof. In this case, the disk 10 is formed by piching the intermediate layers 20 between the steel plates 16, 18. The intermediate layers 20 are metals or alloys having a Young's modulus lower than the same of the steel plates 16, 18 and are connected metallurgically to the steel plates 16, 18 through bonding layers 22, 24. Upon manufacturing, copper plating is applied to both surfaces of a thin plate, forming the intermediate layer 20, thereafter, metallic powder, reacting with the copper and forming a phase of high strength and melting point, and flux are interposed between respective steel plates 16, 18, then, they are heated and pressed to form the disk 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to stone, tiles, glass, lenses, and glass materials.

FIG. 1 is a 1E view of the disc 10 for a diamond cutter. This disk 10 is circular as shown,
A large number of notches 12 are provided on its circumferential surface, and blades 4 are provided on its circumferential surface.

Since this disc is required to be rigid and strong, it has traditionally been made of high carbon steel or a material made by adding some alloying ingredients such as nickel, chromium, tungsten, molybdenum, vanadium, etc. Hardened and tempered) are used.

However, in conventional disks, noise is likely to occur due to the contact between the object to be cut and the disk during cutting or the vibration of the substrate due to intermittent edge cutting.

For example, as shown in FIG. 2, the blades 14 are discontinuous in the circumferential direction, which applies periodic stress to the disk IO, which causes vibrations in the disk and tends to generate loud noise. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk for a diamond cutter and a method for manufacturing the same, in which noise is significantly reduced.

In order to achieve this object, the present invention, as a first invention,
A disk consisting of a plurality of steel plates bonded together via an intermediate layer, the intermediate layer being a metal or alloy having a lower Young's modulus than the steel plate, and each steel plate and the intermediate layer being metallurgically bonded. This disc for a diamond cutter is characterized in that an intermediate layer 20 is sandwiched between steel plates 16, 18, and the intermediate layer 20 and the steel plates 16, 18 are bonded to each other via an adhesive layer 22, 24. is combined with

Further, the intermediate layer 20 has a lower Young's diagram than the steel plate 16 and IFI, and the steel plates 16 and 18 are metallurgically bonded via the intermediate layer 26. This intermediate layer 26 has a lower Young's modulus than the steel plate +fi, 18, and is formed by plating the steel plate +6.18.

In the present invention, various types of steel commonly used for disks can be used as the steel.

In addition, for the intermediate layer, copper, copper alloys such as brass, aluminum, aluminum alloys, etc., which have a lower Young's modulus than steel, can be used, and copper alloys are particularly suitable for copper because of their strength and corrosion resistance. . Other thin plates with vibration absorbing properties can also be used.

Examples of such materials include those made of porous materials.

In addition, as shown in FIG. 8, as for the plate material of the intermediate layer, a through-hole 32 is provided between the outer periphery and the center hole 30 to the extent that the strength allows.
A shield 34 is also suitable. This hole 3
2 is a steel plate that forms a cavity when narrowed, increasing the vibration absorption effect.

Although the intermediate layer is sandwiched between two steel plates in FIGS. 3 and 4, the present invention is not limited to this, and the intermediate layer may be sandwiched between three or more steel plates. .

By sandwiching the intermediate layer with a low Young's modulus in this way, this intermediate layer acts as a vibration absorber, greatly reducing vibration.
The noise generated from the disc can be significantly reduced.

In addition, in the disc of the present invention, multiple steel plates are strongly integrated, and the moment of inertia of the area is comparable to that of a conventional single disc, providing sufficient strength and stiffness. have. That is, assuming that the thickness of the steel plate used in the conventional disk is 4 mm, the moment of inertia of this steel plate is: b (width) x 43 = 5°3b 2 . - In the disc of the present invention shown in Fig. 3, if the thickness of the steel plate 16.18 is two fins and these are not connected to each other, the second moment of area of the steel plate 16.18 is: - b X2' +-A-b ×2" = 1, 3
bl 2 12 , and from Euler's theoretical formula, the buckling strength Par (kg
/cr/L'), Pcr=nπ'(,:t) Therefore, the buckling strength is reduced to about 10 compared to the conventional one. On the other hand, in the disk of the present invention, since the steel plates are metallurgically and firmly connected as described above, the second moment of area is the same, and the substrate strength does not change.

The present invention also provides the following second and third inventions as a preferred method for manufacturing the disk according to the first invention.

A second invention is a method including a step of sandwiching thin plates made of metal or alloy having a Young's modulus lower than that of steel between steel plates, and then joining them by heating and pressurizing the plates, the method comprising the steps of: Copper plating is applied to the surface in advance, and when the thin plate is sandwiched between steel plates, a metal and/or alloy that reacts with the copper to form a phase with high strength and a high melting point is added between the thin plate and the steel plate. The gist of the present invention is a method for manufacturing a disc for a diamond cutter, characterized in that a powder of the present invention and a flux are interposed therein.

In addition, when a plurality of steel plates are bonded together, the surfaces of the steel plates to be bonded are plated with copper in advance, and there is a layer between each steel plate that reacts with the steel to provide high strength and high melting properties. 9 tons of diamonds, characterized by a process in which metal and/or alloy powder forming a dot phase and flux are interposed, and then the steel plates are heated and pressed to join them. The gist of this article is a method for manufacturing cutter discs.

In these second and third inventions, copper, copper alloy, aluminum, or aluminum alloy is preferable as the metal or alloy having a Young's modulus lower than that of 1 steel, especially in terms of strength. Copper and copper alloys are preferred from the viewpoint of corrosion resistance and corrosion resistance.

Powders of metals and/or straddle alloys that still react with copper to form phases with high strength and high melting points include lead, soot,
One or more of aluminum and zinc-soot alloys are preferred. Although the particle size of this powder is not particularly limited, fine powder on the order of microns is suitable. Further, it is preferable that the amount of this powder be equal to or less than the amount of copper to be hl-plated, particularly about 20 to 40% by weight.

As the flux, a flux that sublimates at the heating temperature during bonding is suitable, such as ammonium chloride.

The temperature heated when joining the steel plates is higher than the melting point of the metal and/or alloy powder that reacts with copper to form a high-strength, high-melting-point phase, and preferably the quenching temperature of the steel is 10 to 10%. The temperature is in the order of over 100°C, particularly preferably in the range of 20 to 50°C above the quenching temperature of this steel.

Further, the pressure applied during this joining is not particularly limited, but is 1 to 100 kg/cx2, particularly 5 to 50 kg.
g/CPIL about 2 is suitable. It is preferable to hold at these temperatures and pressures for 5 to 100 minutes, preferably 10 to 20 minutes, then gradually cool to the quenching temperature, and then quench.

In this process, the metal and/or alloy powder that reacts with copper to form a phase with a high strength and high melting point melts at its melting point and reacts with the copper or copper alloy to form a phase with a high melting point and high strength. Then, metallurgically connect the steel plate and the intermediate layer or steel plates to the strong country. Figure 5 is a binary phase diagram of copper and zinc. Zinc starts melting at 419.5°C, and the resulting melt immediately reacts with copper to form a high-strength, high-melting-point phase (e.g. α phase). ).

Generally, when brazing brass to steel, it is necessary for the brass to melt and sufficiently wet the steel plate.

Also, the zinc that makes up the brass reacts with iron to form Fe, Z
It is necessary to prevent the precipitation of brittle metal tube compounds such as n, Fe, Zn, etc., but by applying copper plating in advance to the bonding surface of the steel plate as in the present invention, it is possible to Even when brass is used or zinc is used as the above-mentioned powder, direct reaction between the steel and zinc is prevented and the steel plates or the copper plate and the intermediate layer are firmly bonded. Become.

On the other hand, flux removes oxides from the steel plate and the intermediate layer 1 and facilitates the wetting reaction of the metal. This bonding can be easily achieved by using a sublimable flux such as ammonium chloride.

The present invention will be described in detail below, but the present invention is not limited to the following examples unless it exceeds the gist thereof.

Example I 2 made of JIS, 5K5 (quenching temperature 85'0°C) steel
One side of the disc was plated with copper, and a thin plate of brass was held between the discs. A solution of ammonium chloride mixed with zinc powder is applied between the brass plate and each steel plate. Thereafter, while applying a pressure of about 10 kl/cm', these steel plates were placed in a furnace at 880°C, held at this temperature for 15 minutes, and then gradually cooled in the furnace to 850°C, and then quenched.

As a result, a disc for a diamond cutter was obtained that had extremely low noise, high rigidity, and strong strength. FIG. 6 is a microscopic photograph showing the metallographic structure of the cross section of the disk manufactured in this manner, and it can be seen that the steel and the brass plate sandwiched therein are strongly bonded metallurgically.

Example 2 Copper plating was applied to one side of two disks made of JIS, Si2 steel, and the plated surfaces were smeared with a solution containing zinc powder mixed with argon chloride/monium chloride solution. Next, this was placed in a furnace at 880°C and held for 15 minutes, and then heated to 850°C.
It was gradually furnace cooled to ℃ and then quenched. This also resulted in a disk that was extremely low in noise and had high repellency and stiffness.

Comparative Example A mixture of ammonium chloride solution and zinc powder was applied to one side of a JIS, Si2 steel plate, and then a brass plate was sandwiched between the steel plates and treated in the same manner as in the above example. The resulting disc had low bonding strength;
It was insufficient as a disc. FIG. 7 is a microscopic photograph showing the metal structure in this cross section.

As described above, the present invention provides a disk for a diamond cutter and a method for manufacturing the same in which noise is significantly reduced. Furthermore, the disc according to the present invention has sufficient rigidity and stiffness.

[Brief explanation of the drawing]

FIG. 1 is a front view of a disk for a diamond cutter, FIG. 2 is a graph illustrating the state of stress generation in the circumferential portion of the disk, FIGS. 3 and 4 are longitudinal sectional views of the disk according to the present invention, and FIG. Figure VI copper-zinc binary system phase diagram,
6 is a microphotograph showing the metallographic structure of a disk according to an example of the present invention, FIG. 7 is a photomicrograph showing the metallographic structure of a disk according to a comparative example, and FIG. 8 is a plan view of the thin plate 34. 10... Disc, 12... Cut υ in, 14
...Blade, 16.18...Steel plate, 20.
・-Middle layer, 22.24... Contact M layer, 26・
...middle class. Agent Tatsuyuki Unuma (and 2 others) Figure 1 14 Figure 2 Figure 3 Figure 4 Figure 5 □□□□'' I2. ? Figure 6 Near '4, ゛ζ--\(j )-27 Figure 8 Figure 7

Claims (1)

[Scope of Claims] (1) A disk formed by laminating a plurality of steel plates with an intermediate layer interposed therebetween, the intermediate layer being a metal or alloy having a lower Young's modulus than the steel plates, and each steel plate having a lower Young's modulus than the other. /l? that it is metallurgically bonded to the intermediate layer? (2) The disk for a diamond cutter according to claim 1, wherein the intermediate layer is a thin plate of metal or alloy. (3) A disk for a diamond cutter according to claim 2, characterized in that a through hole is formed in a thin plate of metal or alloy. (4) The disk for a diamond cutter according to claim 2 or 3, wherein the metal or alloy thin plate is a porous plate. (5) The disc for a diamond cutter as set forth in claim 1, wherein the intermediate layer is a taming layer formed on a surface of a steel plate. (6) A method including the step of sandwiching a thin plate made of a metal or alloy with a lower Young's modulus than steel between steel plates, and then joining them by heating and pressurizing the plates, the surfaces of the steel plates to be joined to Copper plating has been applied in advance, and when the thin plate is sandwiched between steel plates, a metal and/or alloy powder that reacts with the copper to form a phase with high strength and a high melting point is added between the thin plate and the steel plate. A method for manufacturing a diamond cutter disc, characterized in that a disc for a diamond cutter is interposed with a flux. (7) The method for manufacturing a disk for a diamond cutter according to claim 6, wherein the metal or alloy having a Young's modulus lower than that of steel is copper or a copper alloy. (8) The metal and/or alloy powder that reacts with copper to form a phase with high strength and high melting point is characterized by being one or more of zinc, soot, aluminum, and zinc-soot alloy. A method for manufacturing a diamond cutter disk according to claim 6 or 7. (9) When bonding multiple steel plates together, copper plating is applied in advance to the surfaces of the steel plates to be bonded, and
A metal and/or alloy powder that reacts with copper to form a high-strength, high-melting-point phase and a flux are interposed between each steel plate, and then these steel plates are heated.
A method of manufacturing a disc for a diamond cutter, which is characterized by a pressurized joining process and a tip metal workpiece. On The method for manufacturing a diamond cutter disk according to claim 9, wherein the flux is a flux that sublimates at a heating temperature during bonding.