KR20100008894A - Manufacturing method for the abrasive material - Google Patents

Abstract

PURPOSE: A manufacturing method for an abrasive material is provided to improve abrasive efficiency with high hardness and a uniform grain size by adopting a recycled stainless abrasive material during a blasting or shot blasting processes. CONSTITUTION: A manufacturing method for an abrasive material is as follows. A stainless material is collected. A stainless material is melt. A mixing compound is put into in the molten stainless material. The mixing compound constitute C(Carbon) of 2.2wt.%, Mn(Manganese) of 0.10wt.%, Si(Silicon) of 0.40wt.%, P(Phosphorus) of 0.04wt.%, Mo(Molybdenum) of 0.15wt.%, S(Sulfur) of 0.005wt.%, Cr(Chromium) of 20.00wt.%, and Ni(Nickel) of 10.00wt.%.

Description

Manufacturing method for abrasives used to clean molds and precision parts {Manufacturing method for the abrasive material}

The present invention relates to a method of manufacturing an abrasive used for cleaning molds and precision parts, and more particularly, after collecting various stainless materials from scrap or other waste materials of the press-molded product collected from the outside, melting through a melting process C 2.2 wt%, Mn 0.10wt%, Si 0.40wt%, P 0.04wt%, Mo 0.15wt%, S 0.005wt%, Cr 20.00wt%, Ni 10.00wt% in the melting process The present invention relates to a method for manufacturing an abrasive used for cleaning molds and precision parts that can be made by adding a new abrasive to the alloy composition.

In general, the blasting method includes a blasting method such as a dry blast or a wet blast that sprays abrasives using a pressurized fluid such as compressed air. It includes a blast processing method which can project an abrasive | polishing agent at a predetermined | prescribed injection speed or an injection angle with respect to the processing surface of a to-be-processed object, such as the flat type which strikes and projects an abrasive using a rotor.

The above-described blast cleaning refers to polishing of a metal surface such as sand, steel ball or the like strongly on the surface to be processed, and polishing or cleaning of the metal surface by the collision, also referred to simply as blasting. In addition, depending on the injection method, power blast (using high pressure air), wet blast (using water and abrasives as liquid, also called liquid honing), centrifugal blast (using metal rotating wheel centrifugal force), vacuum blast (injection) And abrasives, dust is recovered in a vacuum).

On the other hand, there are short blasts using metals according to the type of abrasive used, and the materials used here include steel balls, steel grit, steel cut wires, aluminum cut wires, and non-metals use sand blasts. Most of them use minerals such as sanding sand, garnet (garnet), copper slag, diamond steel, plastic shot, glass beads, ceramic beads, silicon carbide, and silicon carbide. Among these, metal projection abrasives are superior to nonmetals in terms of durability and polishing efficiency, but the manufacturing cost is considerably higher than that of minerals by several tens to one hundred times. Also, metal projection abrasives have to be specially manufactured for the material. Mostly used for abrasive products requiring special surface finish.

The use of mineral materials is limited in terms of nature conservation, and it is an encouraging technology in terms of waste recycling, but it is expensive, low hardness, low roughness, corrosiveness of copper slag, large amount of dust after blasting, and it is impossible to reuse. There is a problem. In addition, the stainless steel plate and the pipe is collected into the steel mill for recycling, but there is a problem that the conditions for making the abrasive is not sufficient.

The present invention has been made in order to solve the above problems, can be recycled to form a stainless abrasive having a predetermined size through the waste material stainless dissolving process, melt spraying process, classification process collected from the outside, An object of the present invention is to provide a method for manufacturing abrasives used to clean molds and precision parts that can reduce environmental pollution.

In order to achieve the above object, collecting the stainless material from the outside, and melting the collected stainless material through a melting process, while in the melting process C 2.2wt%, Mn 0.10wt%, Si 0.40wt%, P 0.04 wt%, Mo 0.15 wt%, S 0.005 wt%, Cr 20.00 wt%, Ni 10.00 wt% A process for adding a mixed composition, and generating pressure by spraying the melt flowing out of the melt into which the raw material is injected A process, slow cooling the powder of molten metal to be injected, and classifying the cooled molten metal to the outside through a classifier, wherein the abrasive is used for cleaning molds and precision parts. It is about.

       As described above, according to the present invention, by melting the waste material stainless portion and adding a predetermined element, it can be recycled as an industrial abrasive and can reduce environmental pollution.

In addition, when the recycled stainless abrasive is used in the blasting or shot blasting process, the hardness is better and the polishing efficiency is improved to a uniform particle size as well as the surface roughness after blasting, and in particular, the existing equipment can be used without modification, There is an effect that the dust generation amount is remarkably small.

The terms or words used in the present specification and claims are not to be construed as being limited to ordinary or private meanings, and the concept of terms may be appropriately defined to explain the inventor's invention in the best way. It should be interpreted to mean and concept in accordance with the technical idea of the present invention.

Hereinafter, the configuration of the present invention in detail with reference to the accompanying drawings as follows.

1 is a working process diagram illustrating a method of manufacturing an abrasive used for cleaning a mold and precision parts according to the present invention.

The present invention comprises the steps of collecting the stainless material,

Dissolving the collected stainless material;

Melting the stainless material through the melting process, while C 2.2wt%, Mn 0.01wt%, Si 0.40wt%, P 0.04wt%, Mo 0.15wt%, S 0.005wt%, Cr 20.00wt% Injecting a mixed composition of Ni 10.00wt%,

Generating and spraying a predetermined pressure when the melt into which the mixed composition is introduced flows;

Slow cooling the powder of molten metal to be injected;

The cooled molten metal comprises a step of classifying to the outside through a classifier.

In the manufacturing method of the present invention, first, the stainless steel separated from the waste materials is collected and stored in a yard, and then moved to a separate reservoir through a conveyor connected with a loading device, which is a mobile device, and the collected stainless steel is rapidly cooled in a molten state. To produce granulated abrasives. At this time, the spherical nozzle is formed by spraying the molten stainless steel at the optimum spraying speed, and the blower nozzle forming the spraying air flow is preferably configured at the top and the bottom, respectively.

Water may be sprayed on the side of the tuyeres nozzle in the form of a spray, and a structure capable of performing rapid rapid cooling with gas and water vapor may perform a rapidly suppressed oxidation reaction.

For more effective rapid cooling, a cooling device capable of spraying water vapor in a spray state is installed on the side where the granulated abrasive falls, and configured to perform rapid cooling treatment quickly.

The abrasive produced through such a processing process can be produced in various sizes up to 0.02 ~ 0.4mm in particle size.

On the other hand, the uniformity coefficient showing the particle size distribution and the uniformity of the particle size for each dimension range is shown in {Table 1}.

Table 1. Abrasive particle size distribution and uniformity factor produced by the machining process

    Nominal dimension of sieve (mm) Weight granularity percentage passing through sieve          Uniformity factor            > 5             0%            1.22         1.2 ~ 2.5            15%              "         0.6 ~ 1.2            28%              "         0.3 ~ 0.6            35%              "         0.1-0.3            12%              "        0.01 ~ 0.1             3%              "          <0.01             2%              "

As mentioned above, the particle size distribution was found to occupy 90% of the samples in the range of 0.1 ~ 2.5mm, and in the case of the uniformity coefficient, the closer to '1', the more uniform the particle size was. You can check it.

Table 2. Physical Properties of Abrasives Feeded with Mixed Composition

    Item    Heavy weight  Apparent specific gravity   HVC (hardness)   HRC (hardness)     Morse    Abrasive     3.54     2.75   800-900     50-65   7.5 ~ 9.0     Item     burglar   Absorption rate (%)   Uniformity factor Polished Surface Roughness    Repose    Abrasive   290-470      0.1     1.22  60 ~ 160㎛    14-18 °

Table 3. Evaluation of Abrasives Added with Mixed Composition

Mixed composition abrasive   Copper slag     Quartz sand    Garnet  Glass bead     Roughness   Very good     Good     usually     Good     usually Reusability   11-13 times     Impossible     Impossible     3 ~ 4 times     Impossible Easy to change equipment     Dragon     Dragon     Dragon     Dragon     usually Waste Applicability     Normal     appointed     appointed     appointed     appointed

Table 4. Comparison of Particle Size and Polishing Characteristics by Abrasives in Surface Treatment

 Particle Size Table (mm)     Surface roughness  Polishing Area   Generated Dust     Sand 1     0.1-0.4        35       9.0      250     Sand 2     0.4-1.0        50       5.5      350     steal     0.1-0.4        60       8.0       86 Mixed Composition Abrasives     0.1-0.4        90        11       15

As a result, the surface roughness of all three types were better than those of small particles, but by the type of projection abrasive, the mixed composition, abrasive, steel, and sand appeared in the order of the mixed composition of the present invention than the conventional sand. It was confirmed that the charged abrasive was more effective.

In addition, the polishing treatment area was also able to process a larger area than all the small particles in all three, but the effect is also different for each abrasive, the abrasive mixture of the present invention is more abrasive than the sand of the same size polishing the area It was measured that it could. In addition, the dust generated during the polishing operation is a pollutant and can cause a big problem for the health of the workers. As a result of the experiment, a significant amount of dust was generated in the case of the sand that is broken through the collision on the polishing surface and generates a lot of dust. In the case of the mixed composition input abrasive of the present invention, it was found that only 1/5 of the sand of the same size occurred.

In other words, the larger the size of the projected abrasive material, the higher the surface roughness was. The treatment area was small and more dust was generated. The abrasive efficiency of the mixed composition of the present invention was better than that of sand and steel. .

The present invention described above is capable of various substitutions and modifications within the scope without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains, the foregoing embodiments and the accompanying drawings. It is not limited to.

1 is a work flow diagram schematically showing the work process of the present invention.

Claims (3)

In the blasting abrasive manufacturing method, Collecting stainless material, Dissolving the collected stainless material; Melting the stainless material through the melting process, while C 2.2wt%, Mn 0.10wt%, Si 0.40wt%, P 0.04wt%, Mo 0.15wt%, S 0.005wt%, Cr 20.00wt% Injecting a mixed composition consisting of 10.00wt% Ni, Generating and spraying a predetermined pressure when the melt into which the mixed composition is introduced flows; Slow cooling the powder of molten metal to be injected; The cooled molten metal is a manufacturing method of the abrasive used for the cleaning of molds and precision parts comprising the step of classifying to the outside through a classifier. The method of claim 1, The specification of the abrasive is added to the mixed composition is 0.02 ~ 0.6mm, 0.05 ~ 0.1mm, 0.1 ~ 0.2mm, 0.3 ~ 0.4mm characterized in that any one of the abrasives used in the cleaning of the mold and precision parts, characterized in that it can be selected Manufacturing method. The method of claim 1, The mixed composition may be contained in a ratio of C 2.2wt%, Mn 0.10wt%, Si 0.40wt%, P 0.04wt%, Mo 0.15wt%, S 0.005wt%, Cr 20.00wt%, Ni 10.00wt% A method of manufacturing an abrasive used for cleaning molds and precision parts, characterized in that the configuration.

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