JP2001219357A - Compound for polishing barrel and barrel polishing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compound for polishing a barrel and a barrel polishing method capable of stably exercising the action of a surface active agent without depending on an amount of ion included in the water. SOLUTION: A polishing operation is executed in a state that works, abrasive stones, the water, the surface active agent, and an ion adsorbing agent (zeolite) capable of adsorbing a calcium ion and/or magnesium ion in the water and preventing the formation of smut during the polishing operation, are mixed inside a barrel polishing vessel, whereby the polishing operation of the works can be stably executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a compound for barrel polishing and a method for barrel polishing.

[0002]

2. Description of the Related Art Conventionally, barrel polishing has been used as a method of performing deburring and edge rounding of small products and semi-finished products (hereinafter, referred to as "workpieces") such as cast products or stamped products. Methods are known. In this method, a work is filled in a barrel-shaped polishing tank (barrel) together with a polishing stone called a medium, and a polishing operation such as rotation or vibration is performed. Deburring, casting scale removal, rounding of corners and ridges, and gloss finishing are performed.

There are two types of barrel polishing methods: dry barrel polishing in which water is not injected into the barrel, and wet barrel polishing in which water is injected into the barrel to perform a polishing operation.
Among these, in wet barrel polishing, a polishing operation is performed by charging a medium, water, and a polishing aid called a compound into a barrel together with a work. Among them, the compound mainly contains a surfactant,
Ingredients are added according to the purpose such as rust prevention and gloss.

[0004]

By the way, soap, a kind of surfactant, is blended into a compound mainly for the purpose of cleaning the surface of a work. When soap is compounded in the compound, the balance with the properties of water is important. That is, in the wet barrel polishing, when hard water containing a large amount of calcium ions or magnesium ions in water is used, metal soaps such as calcium soap and magnesium soap which react with soap and calcium ions or magnesium ions and are insoluble in water. Is generated. For this reason, there was a case where it was not possible to achieve the original cleaning action of the soap. Conventionally, in order to solve this problem, by compounding excess soap in advance in the compound,
Excess soap removed calcium and magnesium ions, and the remaining soap had its original cleaning action.

However, even if such measures are taken, if the hardness of the water used is higher than expected, a large amount of soap is consumed for ion removal, and a sufficient amount of soap does not remain. As a result, the required detergency could not be obtained. On the other hand, if the hardness of the water used is lower than expected, excess soap will be present, and such excess soap may adhere to the surface of the work as a black stain called smut. . In this smut, excessive soap wraps up dirt, and further takes in swarf of the polishing stone and polishing scum of the work, which causes deterioration of the quality of the work after barrel polishing. In addition, the presence of excess soap or metallic soap increases the viscosity in the barrel too much and reduces the frictional forces,
There has also been a problem that the polishing power is reduced. For this reason,
The amount of soap in the compound had to be adjusted according to the hardness of the water at the place where the polishing operation was performed, and a complicated operation had to be performed.

As another method, an attempt has been made to add a chelating agent in order to remove calcium ions and magnesium ions in water. The chelating agent is
A certain effect can be obtained because a chelate compound is generated and masked by coordinating with calcium ions and magnesium ions in water. However, if a large amount of the chelating agent is present in the water, smut is generated in the same manner as described above. Therefore, adjustment must be performed according to the hardness of the water.

The present invention has been made in view of the above circumstances, and has as its object to provide a barrel capable of stably exerting the action of a surfactant regardless of the amount of ions contained in water. An object of the present invention is to provide a polishing compound and a barrel polishing method.

[0008]

In order to solve the above-mentioned problems, the barrel polishing compound according to the first aspect of the present invention contains a surfactant, and contains calcium ions and / or magnesium ions in water. And an ion adsorbent capable of avoiding the formation of smut during the polishing operation.

In the barrel polishing method according to the second aspect of the present invention, the polishing is performed while adsorbing a work, a polishing stone, water, a surfactant, and calcium ions and / or magnesium ions in water in a polishing tank. The work is polished by performing a polishing operation in a state where an ion adsorbent capable of avoiding formation of a smut during operation is mixed.

[0010]

According to the first and second aspects of the present invention, when performing barrel polishing, calcium ions and / or magnesium ions in water are adsorbed and smut formation during the polishing operation is avoided. By adding a possible ion adsorbent, the ion adsorbent adsorbs calcium and / or magnesium ions in the water. For this reason, it is possible to avoid a situation in which the surfactant in the compound is denatured by the ions and lowers the detergency. Therefore, the work can be effectively cleaned and polished. Further, since it is not necessary to adjust the amount of the surfactant, it is easy to prevent the occurrence of unexpected smut, and a stable polishing operation can be performed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A barrel polishing compound according to an embodiment of the present invention absorbs at least a surfactant and calcium ions and / or magnesium ions in water and avoids smut formation during a polishing operation. Obtained ion adsorbent (hereinafter, such an ion adsorbent may be referred to as "predetermined ion adsorbent").
And is contained.

Examples of the surfactant include soap mainly composed of alkali salts of higher fatty acids, such as tallow soap, coconut oil soap, and hardened oil soap, and other surfactants such as alkyl benzene sulfonate. Alkyl sulfate, polyoxyethylene alkyl ether, sucrose fatty acid ester and the like. As for the action of the surfactant, it is desired that the soap has a washing action and a gloss imparting action, and that the surfactant other than the soap has a foaming action, a washing action, an action of preventing reattachment of dirt, and the like.

[0013] Further, as the above-mentioned predetermined ion adsorbent,
For example, zeolites, ion exchange resins, inorganic salts, and the like can be used. Among them, zeolite can be used in the form of powder. Zeolite is porous and has a property of adsorbing calcium ions and magnesium ions in its pores. In addition, since zeolite itself does not easily generate smut, if a predetermined amount is mixed in advance, even if the amount of ions in water has a considerable range, it is possible to adsorb those ions. For this reason,
Since it is not necessary to adjust the amount of the surfactant, it is easier to prevent the occurrence of smut. As the origin of the zeolite, any of a natural zeolite and a synthetic zeolite can be used. When a synthetic zeolite is used, A-type zeolite, X-type zeolite, Y-type zeolite and the like can be used.

When an ion exchange resin is used as the ion adsorbent, for example, polystyrene sulfonic acid type resin, phenol sulfonic acid type resin and the like can be used. When an inorganic salt is used, for example, sodium carbonate, trisodium phosphate, sodium metaphosphate, potassium carbonate and the like can be used.

The compound for barrel polishing may contain, in addition to the surfactant and the ion adsorbent, a builder for assisting the action of the surfactant, a rust preventive, a pH adjuster, and an organic powder. Can also. In that case, by adding a builder, it is possible to obtain the effect of enhancing the detergency of the surfactant, such as, for example,
Silicates, carbonates, phosphates and the like can be used. Further, as the rust preventive, for example, nitrite, borate, phosphate, aromatic carboxylate and the like can be used. Examples of the ph regulator include borax,
Sulfates and the like can be used. Further, by adding the organic powder, it is possible to obtain an effect of wiping off stains on the surface of the work, and as such, for example, corn husk powder, wood powder, walnut powder, chaff powder and the like can be used. .

When the above-described barrel polishing compound is used for a work polishing operation, the barrel polishing compound, the work, the polishing stone, and water are mixed in the polishing tank. Then, the polishing tank is driven. At this time, if calcium ions or magnesium ions are contained in the water, the action of the surfactant is reduced, but such ions are adsorbed by the ion adsorbent contained in the barrel polishing compound. Therefore, the surfactant can exhibit a stable action. Further, since the ion adsorbent itself is used which can avoid the formation of smut, it does not affect the finish of the work. Thus, the workpiece is polished by the polishing stone by the polishing operation.

Further, in the embodiment of the present invention, in addition to the case where the predetermined ion adsorbent is previously mixed into the compound for barrel polishing as described above, the predetermined ion adsorbent is added separately from the surfactant or the like. It can also be mixed in a barrel tank. That is, during the polishing operation, inside the polishing tank,
The work can also be polished by performing a polishing operation in a state where the work, the polishing stone, the water, the surfactant, and the predetermined ion adsorbent are mixed. In this case, in addition to the surfactant, the above-mentioned builder, rust inhibitor, p
Needless to say, h regulators, organic powders and the like can be added.

Hereinafter, the present invention will be described in more detail by way of examples, but it is needless to say that the present invention is not limited to the following examples. Further, the mixing ratio of each component can be varied and implemented.

[0019]

EXAMPLES <Adjustment of Compound> In the experiment, the following compound was prepared as a compound which was conventionally designed on a soft water basis. The component is 10.0% by weight of sodium alkylbenzene sulfonate as a surfactant,
8.0% by weight of tallow soap, 3.0% by weight of sodium silicate as a builder, 5.0% by weight of sodium tripolyphosphate as a rust preventive, and 10.10% of sodium nitrite as a rust preventive.
0% by weight, 10.0% by weight of borax as a ph regulator,
The corn flour was 54.0% by weight, and this compound was used as a control compound.

In addition, zeolite (Silton B powder manufactured by Mizusawa Chemical (A-type zeolite,
Particles having a particle size of 2-3 μm) added at 5.0% by weight were used as the compound for barrel polishing in this example.

<Comparative Example 1> Rotating barrel FH as a polishing machine
-15 (manufactured by Tipton Co., Ltd., capacity: 15 liters), and a work described later and a polishing stone GXRP-5 made by ceramics (manufactured by Tipton Co., Ltd.) were added to the barrel tank in a volume of 50 to the barrel capacity. % And the control compound 75
Gram and each, and water is injected to a position 10 mm above the surface of the mass (general term including all of the work, abrasive stone, compound, etc. charged in the barrel tank) to perform a polishing operation. went.

As the work, carbon steel having a diameter of 28 mm and a thickness of 8 mm was used. In addition, tap water in Nagoya city (the hardness according to JIS K0101 is 27) was used as the water used in the polishing operation. Hereinafter, this water is referred to as “soft water”. In the above state, the barrel polishing operation was performed for 24 hours, and thereafter, the evaluation was performed by measuring the glossiness of the work. The gloss was measured using a digital variable-angle gloss meter manufactured by Suga Test Instruments Co., Ltd.
It is shown based on the 8741 standard. ).

Comparative Example 2 In Comparative Example 1, the water used for the barrel polishing operation was changed from soft water to well water in eastern Nagano prefecture (the hardness according to JIS K0101 was 185).
Hereinafter, this water is referred to as “hard water”. ), Except that the barrel polishing operation was performed in the same manner as in Comparative Example 1, and the glossiness of the work after the polishing operation was measured.

<Comparative Example 3> A barrel polishing operation was performed in the same manner as in Control Example 1 except that the work was changed from carbon steel to stainless steel (φ28 mm, thickness 8 mm). The gloss was measured. <Comparative Example 4> A barrel polishing operation was performed in the same manner as in Comparative Example 1 except that the workpiece was changed from carbon steel to the stainless steel used in Comparative Example 3 and the water was changed from soft water to hard water. The gloss of the work after the operation was measured.

<Comparative Example 5> A barrel polishing operation was performed in the same manner as in Control Example 1 except that the work was changed from carbon steel to brass (φ28 mm, thickness 8 mm). The degree was measured. <Comparative Example 6> A polishing operation was performed in the same manner as in Control Example 1 except that the work was changed from carbon steel to brass used in Control Example 5 and the water was changed from soft water to hard water. The gloss of the subsequent work was measured.

<Example 1> A barrel polishing operation was performed in the same manner as in Control Example 1 except that the control compound was changed to a barrel polishing compound, and the glossiness of the work after the polishing operation was measured. . <Example 2> In Comparative Example 1, a barrel polishing operation was performed in the same manner as in Control Example 1 except that the control compound was changed to a barrel polishing compound and the water was changed from soft water to hard water. The gloss was measured.

Example 3 The same barrel as in Control 1 except that the control compound was changed to a barrel polishing compound and the workpiece was changed from carbon steel to the stainless steel used in Control 3 in Control 1 The polishing operation was performed, and the glossiness of the work after the polishing operation was measured. <Example 4> Control example 1 was the same as control example 1 except that the control compound was changed to the barrel polishing compound, the workpiece was changed from carbon steel to the stainless steel used in control example 3, and the water was changed from soft water to hard water. The same barrel polishing operation as that described above was performed, and the glossiness of the work after the polishing operation was measured.

Example 5 In the same manner as in Comparative Example 1, except that the control compound was changed to a barrel polishing compound and the work was changed from carbon steel to the brass used in Control Example 5, the same barrel polishing was performed as in Control Example 1. The operation was performed, and the glossiness of the work after the polishing operation was measured. Example 6 Comparative Example 1 was the same as Comparative Example 1 except that the control compound was changed to a barrel polishing compound, the workpiece was changed from carbon steel to brass used in Control Example 5, and the water was changed from soft water to hard water. The same barrel polishing operation was performed, and the glossiness of the work after the polishing operation was measured.

<Test Results and Discussion> The above Comparative Examples 1 to
Table 1 shows the test results of Control Example 6 and Examples 1 to 6.
And Table 2. In addition, the rate of decrease (%) when the water used for the barrel polishing operation is changed from soft water to hard water is as follows:
(1− (gloss of the work when using hard water / gloss of the work when using soft water)) × 100.

[0030]

[Table 1]

[0031]

[Table 2]

As a result, when carbon steel was used as the work, the gloss of the work was 573.0 in soft water and 3 in hard water when the control compound was used.
22.8. On the other hand, when a compound for barrel polishing is used, the glossiness of the work is 577.
2. In hard water, it was 546.6.

When stainless steel was used as the work, the gloss of the work was 626.4 in soft water and 416.4 in hard water when the control compound was used. On the other hand, when the barrel polishing compound is used, the glossiness of the work is 61% in soft water.
5.6 and 615.6 in hard water. In addition, when brass is used as a work, the gloss of the work is 64 in soft water when a control compound is used.
0.2 and 408.2 in hard water. On the other hand, when the compound for barrel polishing is used, the glossiness of the work is 675.0 in soft water, and 675.0 in hard water.
0.8.

The reduction rate of the gloss of the work between the use of soft water and the use of hard water was 4% in the control compound when carbon steel was used as the work.
It was 3.7% compared to 3.7% for the barrel polishing compound. When stainless steel is used as the workpiece, the control compound is 3
It was 3.5%, whereas the compound for barrel polishing was 0.0%. When brass was used as the workpiece, the control compound yielded 36.2%, while the barrel polishing compound yielded 0.3%.
6%.

The following facts were found from the results of these tests. In the conventional control compound, when using any work of carbon steel, stainless steel and brass, if the water used is changed from soft water to hard water,
The glossiness of the work after the barrel polishing operation was greatly reduced. This is because if hard water is used, magnesium ions and calcium ions in the water react with the soap, reducing the amount of soap that can be used for polishing workpieces, and thus obtaining the expected cleaning action. Was considered difficult.

On the other hand, in the barrel polishing compound of the present embodiment, when soft water was used, the same polishing effect as the control compound could be obtained when any of the works was used. For this reason, it turned out that zeolite does not have the influence which reduces the glossiness of a work in wet barrel polishing. Also, when the water used was changed from soft water to hard water, the glossiness of the work hardly changed, and a good polishing action could be obtained with any water. This is because zeolite, which is an example of a predetermined ion adsorbent, removes calcium and magnesium ions in water from hard water to prevent those ions from acting on soap, and the soap has its original function. It was thought that it was because it was able to demonstrate.

As described above, according to this embodiment, the zeolite is mixed in the barrel polishing operation, so that the effect of the surfactant can be obtained regardless of whether soft water or hard water is used. Can be exhibited stably. In addition, since zeolite is an inorganic substance, even if it is added in excess, it does not form a smut unlike soap and chelate compounds, so that the quality of the work can be maintained. For this reason, when the zeolite powder is contained in the compound for barrel polishing, a large amount of zeolite powder can be added in advance in case of high water hardness, and can be used for both hard water and soft water. Things can be provided.

Further, during the barrel polishing operation, fine particles of zeolite are pressed against the work by the polishing stone, which can contribute to improvement of the polishing power. In addition, the presence of zeolite in the barrel tank is economical because there is no need to add excessive soap. Also, zeolite is not necessarily required to be added to the compound,
When performing the barrel polishing operation, it is sufficient that the work, the polishing stone, the water, the surfactant, and the zeolite are mixed in the polishing tank.

The above embodiment can be modified and implemented as follows. In this example, after the control compound was adjusted in advance, the compound for barrel polishing was adjusted by mixing zeolite into the compound.However, according to the present invention, zeolite as a predetermined ion adsorbent was first replaced with another zeolite. And a compound for barrel polishing. When zeolite is used as the predetermined ion adsorbent, the zeolite may be mixed not only with the powdery compound but also with the liquid compound.

In this embodiment, zeolite is mixed in the compound for luster. However, according to the present invention, zeolite as a predetermined ion adsorbent is mixed in the compound for rough finishing to form a compound for barrel polishing. Good. When rough finishing is performed, a large amount of oil may be attached to the work, and in such a case, the zeolite also absorbs the oil, so that the soap can sufficiently exert its cleaning action. It becomes possible. Note that the technical scope of the present invention is not limited by the above-described embodiment, but extends to an equivalent range.

Claims (2)

[Claims] 1. A barrel polishing compound containing a surfactant, which comprises an ion adsorbent that adsorbs calcium ions and / or magnesium ions in water and can avoid formation of smut during a polishing operation. A compound for barrel polishing characterized by the following. 2. A work, a polishing stone, and a polishing stone inside a polishing tank.
Water, a surfactant, calcium ions in the water and / or
Alternatively, a barrel polishing method characterized in that the work is polished by performing a polishing operation in a state where an ion adsorbent capable of adsorbing magnesium ions and avoiding the formation of smut during the polishing operation is mixed.