JPS5847435B2 - grinding paste - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grinding paste that is supplied to and interposed between a tool and a workpiece, or between workpieces to be rubbed and polished.

Conventionally, when performing drilling, cutting, grinding, engraving, etc. using ultrasonic vibration, abrasive grains are mixed with a suitable processing fluid and supplied to the processing part, but the polishing effect is not high.

The present invention utilizes a special acid with high adsorption, hydrophilicity, etc. as a main ingredient as a dispersion medium for abrasive grains.

For example, an acid having a molecular structure of Adsorb and disperse.

The structural characteristics of this acid are three COs: primary, secondary, and tertiary.
It has an OH group, and it has a tertiary OH group.

It also has a long chain alkyl group and has a large number of carbon atoms (10 or more).

This acid is usually in powder form and dissolves well in methyl alcohol, so it can be used as an alcoholic solution.
Solubility increases with sodium COONa or higher, and it is used as a sodium salt, or as a salt of potassium, calcium, magnesium, etc., and esterified.

Abrasive grains are commonly used ZrO2, B4C, SiC,
Hard particles such as Al203, BN, and diamond are used.

These abrasive grains may be used alone or in combination, and mixed with the acid medium at a volume ratio of 10 to 50%.

In some cases, solid lubricants such as W2S, MoS2, and BN may be used in combination.

In addition, synthetic resin adhesives such as epoxy, amine, amide, chloroprene, resinoid, halogenated olefin, and ethanolamine can be mixed and used, and copolymerized by electron beam irradiation.

Example 1 Using 400 mesh diamond particles as abrasive grains,
The 3-hydroxy 3,4 dicarboxy pentadecanoisoquaside described above is mixed into a solution in NaOH.

As a medium, ice was added to 400 m of this acid, and diamond grains were mixed therein at a volume ratio of 25, and thoroughly kneaded to prepare a grinding paste.

In this case, due to the strong adsorption power of the acid, the acid is completely adsorbed to the surface of the particles, forming a film, increasing wettability, and making it possible to obtain a grinding paste that is evenly mixed throughout and the particles are uniformly dispersed throughout the medium. Ta.

Next, the grinding process using this grinding paste exhibited extremely high performance in cutting POCO Graphite (trade name, manufactured by Poco Corporation) by adhering to the surface of a high tensile strength wire of 0.2 mm diameter.

The comparative performance when cutting POCO graphite with a plate thickness of 4Qmm is shown in Figure 1.

In the figure, the horizontal axis indicates the compared abrasive grain media, and it can be seen from this comparative test that the one of the present invention has less scattering of abrasive grains and has a high processing effect.

This is because the adsorption power of the acid acts as a strong van der Waalska to adsorb the abrasive grains to the tool, and increases the wettability of the workpiece material to bring the abrasive grains into close contact. enhance sexuality.

In addition, by improving the wettability, scattering outside the processed area is prevented.

Moreover, FIG. 2 compares the state of rust on the polished surface when used for polishing metal surfaces such as iron materials.

In the present invention using the above-mentioned acid, no rust was observed even if water was mixed in the medium, as in the case using oil (Kekoshin).

This acid strongly adsorbs and coats the solid surface polished by abrasive grains due to its adsorption and hydrophilic properties, completely protecting the polished surface from water, air, etc. This is due to the adsorption effect of

As described above, the paste of the present invention does not necessarily cause rust and has high grindability, so it can be effectively used for polishing any metal, alloy, or other non-metallic material.

Further, the paste can be used in a liquid form by mixing with water or other aqueous solution, or in a grease form by mixing with a binder, or by adjusting the hardness as desired depending on the purpose of use.

In addition, when using it by adhering it to a tool as in the above embodiment, it is better to mix an adhesive into the paste, and it is also possible to use it by adhering it and then baking it.

Even if the acid used in the present invention does not have the same structure as the above-mentioned acids, as long as it has three COOH groups, one OH group, and has 10 or more carbon atoms, As explained above, it is practically effective due to the adsorption effect of polar groups.

Furthermore, acids having a lactone type structure are equally effective, and as mentioned above, salts of acids or lactones, esters of acids or lactones, etc. are practically used.

[Brief explanation of the drawing]

FIG. 1 is a comparative performance diagram of the present invention and a conventional example, and FIG. 2 is another comparative performance diagram.

Claims (1)

[Claims] 1. A grinding paste consisting mainly of at least one kind of 3-hydroxy-3,4-dicarboxypentadenic acid or lactone, or its salts, esters, and other derivatives, and mixed with abrasive grains.