KR950005119B1 - Manufacturing method of grinding tools - Google Patents

Manufacturing method of grinding tools Download PDF

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KR950005119B1
KR950005119B1 KR1019920007064A KR920007064A KR950005119B1 KR 950005119 B1 KR950005119 B1 KR 950005119B1 KR 1019920007064 A KR1019920007064 A KR 1019920007064A KR 920007064 A KR920007064 A KR 920007064A KR 950005119 B1 KR950005119 B1 KR 950005119B1
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South Korea
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abrasive
substrate
layer
borax
tungsten carbide
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KR1019920007064A
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Korean (ko)
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KR930021330A (en
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이보현
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이보현
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements

Abstract

The method produces grinding material by melting a ultra light-alloy. The grinding material comprises a base plate, a melt-fused solid layer and a grinding surface layer instead of the conventional homogeneous grinding material. The base plate, being of steel, stainless steel or copper, is coated with a powdered composition of phosphor brorye, aluninium, siluer and borax and coated again with tungsten carbide particles to be heated 4-5 minutes in the atmosphere of 600-1,000 deg.C nitrogen in an electric furnace.

Description

내마모성이 우수한 연마기재의 제조방법Manufacturing method of abrasive substrate with excellent wear resistance

본 발명은 내마모성이 우수한 연마기재의 제조방법에 관한 것으로 구체적으로는 초경합금분말을 이용 용융방법으로 연마기재를 제조하는 방법을 제공함에 있다.The present invention relates to a method for producing an abrasive substrate having excellent abrasion resistance, and more particularly, to a method of manufacturing an abrasive substrate by melting using a cemented carbide powder.

기본 연마재는 인조연마재와 천연연마재로 대별할 수 있고 인조연마재로서는 알루미나, 탄화규소, 탄화붕소, 용융시리콘 등이 있고 천연연마재로는 다이아몬드, 코런덤과 에머리, 가아넷, 규소 등이 있으며 그밖에 모오스경도가 큰 금속 및 무기질 재료들이 연마재로 이용되고 있다.Basic abrasives can be roughly divided into artificial abrasives and natural abrasives. Artificial abrasives include alumina, silicon carbide, boron carbide, molten silicon, etc. Natural abrasives include diamond, corundum, emery, garnet, and silicon. Hard metals and inorganic materials are used as abrasives.

상술한 연마재를 이용한 연마재제품으로는 연마포지 연삭숫돌, 버핑연마재(Buffing Compound)등이 있으며 연마포지는 연마포, 연마지, 내수연마지, 연마벨트, 연마디스크 등 여러형태가 있으며 이들은 단일 연마재 또는 둘이상의 연마재를 결합재와 균일하게 혼합하여 도장접착하므로서 얻어지고 연삭숫돌은 단일 또는 둘이상의 연마재를 규산염, 내열성이 좋은 열경화성합성수지와 같은 결합재와 배합하여 경화시켜 제조하거나 자기소결에 의하여 제조하게 된다. 그밖의 버핑연마재는 스테아린산, 경화유, 우지, 파라핀, 목납 등을 적당히 배합하여 가열용융해서 연마재와 균일하게 혼련하여 유동상태를 나타내는 조성물을 금형에 넣어 냉각고화시킨 것이다.Abrasive products using the above-described abrasives include abrasive cloth grinding wheels, buffing compounds, etc., and abrasive cloths can be in various forms such as abrasive cloth, abrasive paper, water-resistant abrasive paper, abrasive belts and abrasive discs. It is obtained by uniformly mixing two or more abrasives with a binder and painting them. The grinding wheel is prepared by hardening a single or two or more abrasives with a binder such as silicate, a thermosetting synthetic resin having good heat resistance, or by self-sintering. Other buffing materials are a mixture of stearic acid, hardened oil, tallow, paraffin, wax, etc., which are appropriately melted by heating and melted to be uniformly kneaded with the abrasive to form a composition showing a fluid state in a mold for cooling and solidification.

이상과 같이 종래 연마재제품은 연삭숫돌이든 연마포지의 연마도포층이든 경화, 소송, 접착 등 어떤 방법으로 제조되었든간에 연마석이나 연마도포층이 균질성의 혼합물이나 조성물로 이루어진 것이 공통점이라 할 수 있다.As described above, the conventional abrasive products may have a common feature that the abrasive stone or the abrasive coating layer is made of a homogeneous mixture or composition, regardless of whether it is manufactured by a grinding wheel, an abrasive coating layer of the abrasive cloth, or any other method such as curing, suiting, or bonding.

본 발명은 종래 연마재 제품과는 달리 다층구조 형태의 연마재제품으로 연마재와 결착제가 균일하게 배합된 상태에서 용융되어 연마층을 형성하게 되는 것이 아니고 용융고화된 금속결착제가 연마재의 일부를 견고하게 결착된 상태이고 금속결착제가 형성하는 평면으로부터 연마재가 외부로 돌출된 상태의 연마기재를 얻는 것을 목적으로 하고 있다.Unlike the conventional abrasive products, the present invention is a multi-layered abrasive product, which is not melted to form an abrasive layer in a state where the abrasive and the binder are uniformly blended, and the molten solidified metal binder is firmly bound to a part of the abrasive. It is an object to obtain an abrasive substrate in a state where the abrasive is protruded outward from the plane formed by the metal binder.

이상에서 본 발명이 시도하는 연마기재의 제조방법은 철판, 강판, 스텐레스판, 동판 등의 기판상에 미세 분말상의 인청동, 알미늄, 은, 붕사와 유지의 조성물을 전면 또는 부분적으로 균일하게 첨착시킨 다음 모아 경도 9인 텅스텐카바이드(WC) 입자를 그 위에 첨착시켜 질소기류 분위기하에서 온도 600℃-1000℃로 유지시킨 전기로에서 4-5분간 용융시키므로서 내마모성이 우수한 연마기재를 얻게 되는 것이다.In the above-described method of manufacturing an abrasive substrate, a method of manufacturing a fine powdered phosphor bronze, aluminum, silver, borax and a fat or oil on a substrate such as an iron plate, a steel plate, a stainless plate, or a copper plate is uniformly adhered to the entire surface or partially. By collecting the tungsten carbide (WC) particles having a hardness of 9 and melting them in an electric furnace maintained at a temperature of 600 ° C.-1000 ° C. under a nitrogen gas atmosphere, a abrasive substrate having excellent wear resistance is obtained.

상기 용융과정에서는 알미늄이 약 650℃ 전후에서 먼저 용융되기 시작하고 붕사는 약 740℃에서 인청동은 약 830℃에서, 은분은 약 960℃에서 용융되어 기판에 융착됨과 동시에 용융되지 않은 텅스텐카바이드 입자는 용융온도가 약 2800℃에 달하여 용융되지 않은 상태로 용융고화된 금속분말조성물층에 결착되어 표면으로 돌출된 구조를 형성한다.In the melting process, aluminum begins to melt around 650 ° C. first, and borax is melted at about 740 ° C., phosphor bronze at about 830 ° C., silver powder at about 960 ° C., and melted onto the substrate. The temperature reaches about 2800 ° C. to bind to the molten solidified metal powder composition layer in an unmelted state to form a structure protruding to the surface.

또 용융고화층을 구성하는 인청동, 알미늄, 은, 붕사 등은 미세입자 일수록 좋으나 적어도 200매쉬 이상의 입자를 사용해야 용융고화층의 용융온도를 내릴 수 있을 뿐만 아니라 용융되지 않은 입자가 남지않고 용융층의 면이 평활하게 형성되며 이들 조성물을 배합하여 결합시키는 유지의 사용량을 전술한 전체 조성물 중량의 약 1/5 정도가 좋다. 그 이유로는 기판위에 조성물을 첨착하는 인쇄작업이나 로울러 작업에 알맞는 점도로서 작업성이 좋아진다.Phosphor Bronze, Aluminum, Silver, Borax, etc., which make up the molten solidified layer are better as fine particles, but at least 200 mesh particles are required to lower the melting temperature of the molten solidified layer, and the surface of the molten layer without leaving unmelted particles. The amount of the fats and oils formed smoothly and blended and combined with these compositions is preferably about 1/5 of the total weight of the composition described above. For this reason, workability improves as a viscosity suitable for a printing operation and a roller operation in which a composition is deposited on a substrate.

한편 텅스텐 카바이드의 입자는 용융층조성물의 입자보다 커야하며 마모용도에 따라 입자의 크기가 달라지고 적어도 입자의 60-80% 정도로 용융층에 매몰되어 고화되는 것이 가장 이상적이라 할 수 있고, 이들의 첨착방법은 용융고화층 조성물 유지와 배합하여 첨착한 표면에 텅스텐카바이드 분말을 과량으로 부어 털어버리면 텅스텐카바이드 입자가 표면에 첨착된다.On the other hand, the particles of tungsten carbide should be larger than the particles of the molten layer composition, and the size of the particles may vary depending on the abrasion purpose, and at least 60-80% of the particles may be buried in the molten layer and solidified. In the method, the tungsten carbide powder is deposited on the surface by pouring the excess of tungsten carbide powder on the surface where it is combined with the melted and solidified composition oil and fat.

이와 같은 상태로 질소를 충진시킨 밀폐된 전기로에서 용융시키면 텅스텐카바이드가 비중이 크므로 용융층에 서서히 침몰하여 상기 소정의 온도와 시간이 경과하면 입자의 60-80% 정도가 용융층에 매몰되어 고화되는 것이다. 결국 전체적인 구조형태를 아래층이 기판이고 중간층이 금속분말조성물의 용융고화층이며 표면층이 텅스텐카바이드 입자층이라 할 수 있다.When melting in a sealed electric furnace filled with nitrogen in such a state, tungsten carbide has a large specific gravity, so that it gradually sinks in the molten layer, and when the predetermined temperature and time elapse, about 60-80% of the particles are buried in the molten layer and solidified. Will be. As a result, the overall structure can be said that the lower layer is a substrate, the middle layer is a molten solidified layer of a metal powder composition, and the surface layer is a tungsten carbide particle layer.

본 방법에서 사용되는 붕사는 중성용융제로서 강력한 촉매용제 작용을 하여 용융고화층의 강도와 내산성을 증가시키고 용융층의 면을 평활하게 한다. 또 붕사(Na2B4O7·10H2O)는 사용전에 함수량(결정수)의 양을 측정해야 하고 함수량이 크면 용적이 증가하므로 탈수화합물을 사용함이 유리하다. 특히 중요한 것은 붕사의 첨가로 용융고화층의 경도가 월등하게 상승하는 것은 고온에서 붕사의 일부가 B2O3, N2O, H2O로 분해되고 B2O3의 일부가 조성물로 첨가되는 유지의 탄화로 얻어지는 탄소와 고온에서 결합하여 탄화붕소가 생성되는 것으로 생각된다.Borax used in this method acts as a strong catalyst solvent as a neutral melting agent to increase the strength and acid resistance of the molten solidified layer and smooth the surface of the molten layer. In addition, borax (Na 2 B 4 O 7 · 10H 2 O) should measure the amount of water content (crystallized water) before use, it is advantageous to use a dehydration compound because the volume increases if the water content is large. Particularly important is that the hardness of the molten solidified layer is significantly increased due to the addition of borax, which causes part of the borax to be decomposed into B 2 O 3 , N 2 O, and H 2 O at a high temperature, and a part of B 2 O 3 is added to the composition. It is thought that boron carbide is produced by bonding at high temperature with carbon obtained by carbonization of fats and oils.

또 조성물로 첨가되는 알루미늄과 은은 연성을 부여하며 유지는 용융작업전단계 공정인 연마기재 형성공정에서 기판에 금속분말을 첨착시키고 그 위에 텅스텐카바이드 입자를 첨착시켜 작업성을 향상시키며 전술한 바와같이 고온에서 분해된 산화붕소에 탄소를 공급하여 일부 모아경도 9.3인 탄화붕소가 생성하는 것으로 생각된다.In addition, aluminum and silver added as a composition impart ductility, and in the polishing substrate forming process, which is a pre-melting operation, the metal powder is attached to the substrate and the tungsten carbide particles are deposited thereon to improve the workability. It is believed that some of the boron carbides with a hardness of 9.3 are produced by supplying carbon to the decomposed boron oxide.

그밖에 용융고화층은 형성하는 조성물의 조성비는 중량비로 인청동 3부, 알루미늄 5부, 은 8부, 붕사 0.1-0.5부이고, 유지는 금속분말과 텅스텐카바이드 분말이 첨착될 정도이고 텅스텐카바이드 분말은 연마기재의 사용목적 용도에 따라서 입도를 달리 할 수 있으며 첨착량도 조정할 수 있다.In addition, the composition of the molten solidified layer is 3 parts by weight of phosphor bronze, 5 parts of aluminum, 8 parts of silver, and 0.1-0.5 parts of borax, and the fat and oil are adhered to the metal powder and tungsten carbide powder, and the tungsten carbide powder is ground. Depending on the intended use of the substrate, the particle size may be different and the amount of deposition may be adjusted.

이상과 같이 본 발명에 의한 연마기재는 종래의 균일소재인 연마숫돌(그라인더)과는 달리 기판, 용융고화층, 연마표면층으로 되어 있고 이로인해 고가의 연마재를 절약할 수 있으며 표면의 요철로 절삭 또는 연마능이 향상된 내마모성이 우수한 연마기재라 할 수 있다.As described above, the abrasive substrate according to the present invention is made of a substrate, a molten solidified layer, and an abrasive surface layer, unlike conventional grinding materials, which is a homogeneous material. Thus, it is possible to save expensive abrasives and to cut or cut the surface by irregularities. It can be said to be an abrasive substrate having excellent abrasion resistance with improved polishing ability.

또 이와 같은 연마기재는 피연마체의 형상이나 용도에 따라 평판상태로 사용할 수 있고 이 평판을 절단하여 원통상에 권취하여 원통상으로도 사용할 수 있다.Such abrasive substrate can be used in a flat state according to the shape and use of the polished body, and can be cut into a cylindrical shape and wound into a cylindrical shape.

Claims (1)

철판, 강판, 스텐레스판, 동판중 하나의 기판상에 미세분말의 인청동, 알미늄, 은, 붕사와 유지의 조성물을 전면 또는 부분적으로 균일하게 첨착시키고 텅스텐카바이드 입자를 그 위에 균일하게 분포 첨착시킨 다음 온도 600℃-1000℃로 유지시킨 질소기류 분위기의 전기로를 4-5분간 통과시켜 제조함을 특징으로 하는 내마모성이 우수한 연마기재의 제조방법.On the substrate of one of iron plate, steel plate, stainless steel plate and copper plate, the composition of the fine powder phosphor bronze, aluminum, silver, borax and fat or oil is uniformly or partially deposited on the substrate and tungsten carbide particles are uniformly distributed thereon and then A method for producing an abrasive substrate having excellent wear resistance, characterized in that it is produced by passing an electric furnace in a nitrogen gas atmosphere maintained at 600 ° C-1000 ° C for 4-5 minutes.
KR1019920007064A 1992-04-25 1992-04-25 Manufacturing method of grinding tools KR950005119B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100778652B1 (en) * 2007-03-29 2007-11-22 이창엽 The method of preparing non-slip matal plate for stairs using metal paticle's of high hardness
KR101953793B1 (en) * 2018-04-19 2019-06-11 (주)이앤피엔지니어링 Lighting device using thermoelectric module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100778652B1 (en) * 2007-03-29 2007-11-22 이창엽 The method of preparing non-slip matal plate for stairs using metal paticle's of high hardness
KR101953793B1 (en) * 2018-04-19 2019-06-11 (주)이앤피엔지니어링 Lighting device using thermoelectric module

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