JPH03264264A - Porous resin bond grinding wheel and manufacture thereof - Google Patents
Porous resin bond grinding wheel and manufacture thereofInfo
- Publication number
- JPH03264264A JPH03264264A JP6182290A JP6182290A JPH03264264A JP H03264264 A JPH03264264 A JP H03264264A JP 6182290 A JP6182290 A JP 6182290A JP 6182290 A JP6182290 A JP 6182290A JP H03264264 A JPH03264264 A JP H03264264A
- Authority
- JP
- Japan
- Prior art keywords
- porous
- resin
- grinding wheel
- calcium silicate
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011347 resin Substances 0.000 title claims abstract description 36
- 229920005989 resin Polymers 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000000227 grinding Methods 0.000 title abstract description 52
- 239000002245 particle Substances 0.000 claims abstract description 45
- 239000006061 abrasive grain Substances 0.000 claims abstract description 22
- 239000011230 binding agent Substances 0.000 claims description 32
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 32
- 239000000378 calcium silicate Substances 0.000 claims description 32
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 7
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 17
- 230000008878 coupling Effects 0.000 abstract 7
- 238000010168 coupling process Methods 0.000 abstract 7
- 238000005859 coupling reaction Methods 0.000 abstract 7
- 239000004111 Potassium silicate Substances 0.000 abstract 3
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 abstract 3
- 229910052913 potassium silicate Inorganic materials 0.000 abstract 3
- 235000019353 potassium silicate Nutrition 0.000 abstract 3
- 239000010410 layer Substances 0.000 description 19
- 239000012530 fluid Substances 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- 229920001721 polyimide Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000010436 fluorite Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- -1 SICSA IyOs Substances 0.000 description 1
- 235000018734 Sambucus australis Nutrition 0.000 description 1
- 244000180577 Sambucus australis Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 239000011246 composite particle Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、砥粒層が多孔質であるレジンボンド砥石およ
びその製造方法に係わり、特に樹脂結合相の強度を高め
て砥粒保持力を向上するための改良に関する。Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a resin-bonded grindstone in which the abrasive grain layer is porous and a method for manufacturing the same, and particularly relates to a resin bonded grindstone having a porous abrasive grain layer and a method for manufacturing the same. Regarding improvements to improve.
「従来の技術」
レジンボンド砥石の結合剤としては、フェノール系ボン
ドあるいはポリイミド系ホント等が主に使用され、フェ
ノール系ボンドは通常の湿式研削、ポリイミド系ボンド
は乾式または湿式重研削と用途が区分されている。"Conventional technology" Phenol bond or polyimide bond is mainly used as a binder for resin bond grinding wheels. Phenol bond is used for normal wet grinding, and polyimide bond is used for dry or wet heavy grinding. has been done.
ところで、いずれのボンドにおいても、レジンボンド砥
石に共通する問題として、砥粒保持力が弱く砥粒層の摩
耗が大きい点が挙げられる。このためレジンボンド砥石
は被削材に形状を付与する加工には向かず、また砥粒層
の摩耗が早い分、メタルボンド砥石などよりも加工コス
トがかかる欠点を有している。By the way, in any bond, problems common to resin bonded grindstones include weak abrasive grain holding power and large wear of the abrasive grain layer. For this reason, resin bonded grindstones are not suitable for machining that gives shapes to workpieces, and also have the disadvantage that processing costs are higher than metal bonded grindstones because the abrasive grain layer wears out quickly.
そこで従来では、ＳｉＣ等の硬質粒子を樹脂結合相中に
分散させ、結合相の強度を高めて研削面における摩耗を
減らすとともに、砥粒保持力を向上して超砥粒の早すぎ
る脱落を防止する効果を狙った提案もある。Therefore, in the past, hard particles such as SiC were dispersed in the resin binder phase to increase the strength of the binder phase and reduce wear on the grinding surface, as well as improve abrasive grain retention and prevent premature drop-off of superabrasive grains. There are also proposals aimed at achieving this effect.
「発明が解決しようとする課題」
ところが、上記ＳｉＣ等の硬質粒子はそれ自身の硬度が
高いため、研削面において樹脂結合相の表面に露出して
結合相と被削材の接触頻度を低減し、結合相の摩耗を防
止する効果には優れるが、樹脂結合剤に対する接着性は
あまり良くないため、架橋作用により結合相そのものの
強度を高める効果には乏しかった。``Problem to be Solved by the Invention'' However, since the hard particles such as SiC have high hardness, they are exposed to the surface of the resin binder phase on the grinding surface, reducing the frequency of contact between the binder phase and the workpiece. , has an excellent effect of preventing wear of the binder phase, but its adhesion to the resin binder is not very good, so it has a poor effect of increasing the strength of the binder phase itself through crosslinking action.
このため、結合相の強度を高める目的で硬質粒子の混合
量を増すと、研削面からの硬質粒子の脱落が激しくなり
、樹脂結合相の強度が逆に低下し、かえって砥石の形状
不良が生じやすくなる欠点を有していた。For this reason, if the amount of hard particles mixed is increased in order to increase the strength of the binder phase, the hard particles will fall off from the grinding surface more frequently, and the strength of the resin binder phase will decrease, resulting in poor shape of the grinding wheel. It had the disadvantage of being easy to use.
「課題を解決するための手段フ
本発明は上記課題を解決するためになされＴ二もので、
以下、その構成を具体的に説明する。``Means for Solving the Problems'' The present invention has been made to solve the above problems.
The configuration will be specifically explained below.
本発明に係わる多孔質レジンボンド砥石は、樹脂結合相
中に、超砥粒とともに多孔質ケイ酸カルシウム粒子を均
一に分散させたことを特徴とする。The porous resin bonded grindstone according to the present invention is characterized in that porous calcium silicate particles are uniformly dispersed together with superabrasive grains in a resin bonding phase.
この多孔質ケイ酸カルシウム粒子は、
５ｉｎｓ ：５０〜８０ｗｔ％、ＣａＯ：Ｉ Ｏ〜４０
ｗｔ％、Ａ ＬＯ３：０ 、１〜５ ａｔ％を含有する
もので、内部に多数の気孔を有する多弁状をなし、内部
気孔が互いに連通している割合が高い。この多孔質ケイ
酸カルシウム粉末は、例えば徳山曹達株式会社製の商品
名：フローライトＲとして市販されており、参考までに
このフローライトＲの物性を以下に記す。 平均粒径：
２０〜３０μｌ、見掛Ｉす比重：０．０８〜０，１２、
ＰＨ：８．５〜９．１、吸油！：４００〜６００ ｚ（
１／ １０ｈ、吸着水分：８ｗｔ％以下。This porous calcium silicate particle has 5ins:50~80wt%, CaO:IO~40
wt%, ALO3:0, 1 to 5 at%, and has a multi-valve shape with a large number of pores inside, with a high proportion of internal pores communicating with each other. This porous calcium silicate powder is commercially available, for example, under the trade name Fluorite R manufactured by Tokuyama Soda Co., Ltd., and the physical properties of Fluorite R are described below for reference. Average particle size:
20-30 μl, apparent I specific gravity: 0.08-0.12,
PH: 8.5-9.1, oil absorption! :400~600z(
1/10h, adsorbed moisture: 8wt% or less.
多孔質ケイ酸カルシウム粉末の添加量は、砥粒層の３〜
３５ｖｏ１％とされる。実１Ｉｆ１こは砥石の種類によ
って添加量を変えることが望ましく、被削材イこ対し線
接触するホイール型砥石では１０〜３５ｖｏ１％、また
被削材に面接触するカップ型砥石等では３〜２０ｖｏ１
％が最適である。この差は、カップ型砥石では超砥粒の
自生発刃作用が悪く、ホイール型砥石に比して砥粒脱落
を促進する必要があることによる。添加量が３ｖｏ１％
未満では十分な自生発刃作用が得られない。また３５ｖ
ｏ１％を越えると結合相の強度低下が無視できず、砥粒
層の型組れが生じやすくなる。The amount of porous calcium silicate powder added is from 3 to 3 in the abrasive layer.
It is said to be 35vo1%. In fact, it is desirable to change the amount added depending on the type of grindstone; for wheel-type grindstones that make line contact with the workpiece, it is 10-35vo1, and for cup-type grindstones that make surface contact with the workpiece, it is 3-20vo1.
% is optimal. This difference is due to the fact that the cup-shaped grindstone has a poor self-generation effect of the superabrasive grains, and it is necessary to promote abrasive grain shedding compared to the wheel-type grindstone. Addition amount is 3vo1%
If it is less than that, sufficient self-sharpening effect cannot be obtained. Also 35v
If the content exceeds 1%, the strength of the binder phase will deteriorate significantly and the abrasive grain layer will easily become distorted.
樹脂結合剤は、従来から使用されているフェノール系あ
るいはポリイミド系など、熱硬化性および熱可塑性を問
わずいかなるものでもよい。超砥粒の粒径や集中度も使
用目的に応じて決定される。The resin binder may be any conventionally used phenol type or polyimide type, regardless of whether it is thermosetting or thermoplastic. The particle size and concentration of superabrasive grains are also determined depending on the purpose of use.
そして、これら原料を均一に混合して合金とともに型込
めし、加圧加熱成形、焼成を行なって固化させる。その
際、多孔質ケイ酸カルンウム粒子の表層部の内部気孔の
一部に、溶融した樹脂結合剤が入り込んで固化する。加
圧加熱成形、焼成の条件は従来と同様でよいが、成形圧
力が高いか、あるいは溶融時の樹脂結合剤の流動性が高
いと、内部気孔への樹脂結合剤の侵入量が多くなり、粒
子の架橋作用による強度向上効果が増す。ただし、多孔
質ケイ酸カルシウム粒子の気孔率の低下を抑制するため
には、５００ ｋｇ／ ｃ１以下であることか好ましい
。もしも圧力不足で成形性が悪い場合には、成形温度を
高めに設定して補なえばよい。Then, these raw materials are uniformly mixed and put into a mold together with an alloy, and then pressurized, heated, molded, and fired to solidify. At this time, the molten resin binder enters some of the internal pores in the surface layer of the porous carunium silicate particles and solidifies. The conditions for pressure-heat molding and firing may be the same as conventional ones, but if the molding pressure is high or the resin binder has high fluidity when melted, the amount of resin binder that enters the internal pores will increase. The crosslinking effect of particles increases the strength improvement effect. However, in order to suppress a decrease in the porosity of porous calcium silicate particles, it is preferably 500 kg/c1 or less. If moldability is poor due to insufficient pressure, the molding temperature may be set higher to compensate.
こうして得られた砥石原型に整形を施し、多孔質レジン
ボンド砥石を得る。第１図および第２図は、この砥石の
砥粒層を示す断面拡大図で、符号ｌは樹脂結合相、２は
超砥粒、３は多孔質ケイ酸カルシウム粒子である。The grindstone prototype thus obtained is shaped to obtain a porous resin bonded grindstone. 1 and 2 are enlarged cross-sectional views showing the abrasive grain layer of this grindstone, where 1 is a resin binder phase, 2 is a superabrasive grain, and 3 is a porous calcium silicate particle.
上記構成からなる多孔質レジンボンド砥石では、樹脂結
合相ｌに分散された多孔質ケイ酸カルシウム粒子３が多
数の内部気孔を有し、これら内部気孔に結合相！が複雑
に侵入した状態で固化しているので、粒子３と結合相ｌ
との接触面積か極めて大きいうえ、多孔質ケイ酸カルシ
ウム粒子３と樹脂結合相中とは馴染み性（濡れ性）が良
好であるから、これら粒子３を介在して結合相■が強固
な３次元構造を作り、この良好な架橋作用により結合相
■そのものの強度を大幅に高めることができる。In the porous resin bonded grindstone having the above structure, the porous calcium silicate particles 3 dispersed in the resin bonding phase 1 have a large number of internal pores, and the bonding phase! Because the particles are solidified in a complicated state, the particles 3 and the binder phase l
The contact area with the porous calcium silicate particles 3 is extremely large, and the compatibility (wettability) between the porous calcium silicate particles 3 and the resin bonding phase is good. This good crosslinking effect can greatly increase the strength of the bonding phase (2) itself.
これにより、研削面における結合相１の過剰摩耗を防止
し、砥粒保持力を高めて超砥粒２の早すぎる脱落を防止
するとともに、砥粒層の型部れを低減して、従来は困難
だったレジンポンド砥石による高精度の形状付与が可能
となる。This prevents excessive wear of the bonding phase 1 on the grinding surface, increases the abrasive grain retention and prevents the superabrasive grains 2 from falling off too quickly, and reduces the mold part of the abrasive grain layer. It is now possible to create highly accurate shapes using a resin pound grindstone, which was previously difficult.
また、上記のような結合相１の強度向上効果が得られる
にも拘わらず、多孔質ケイ酸カルシウム粒子３そのもの
は比較的脆性を有するから、研削面で露出した粒子３は
結合相Ｉの摩耗に伴ない適度に破壊され脱落していき、
その跡にチップポケットが形成される。こうして研削面
に多数生じたチップポケットにより、切粉の排出性およ
び研削液の保持性が大幅に向上し、砥石の目詰まり防止
効果が得られる。In addition, although the above-mentioned strength improvement effect of the binder phase 1 can be obtained, the porous calcium silicate particles 3 themselves are relatively brittle, so the particles 3 exposed on the grinding surface are susceptible to abrasion of the binder phase I. Along with this, it is moderately destroyed and falls off,
A chip pocket is formed in the trace. The large number of chip pockets thus generated on the grinding surface greatly improves the ability to discharge chips and retain the grinding fluid, thereby providing the effect of preventing clogging of the grindstone.
さらに、多孔質ケイ酸カルンウム粒子３は、吸水量が１
００〜８０（ｉｎ／１００ｇと著しく高いため、研削時
に研削液を砥粒層内に保持することができ、研削熱によ
る砥粒層の温度上昇を防止して砥粒層の熱劣化を防止で
き、かつ高負荷加工が可能となる。Furthermore, the porous carunium silicate particles 3 have a water absorption amount of 1
00 to 80 (in/100g), which is extremely high, allows the grinding fluid to be retained in the abrasive layer during grinding, prevents the temperature of the abrasive layer from rising due to grinding heat, and prevents thermal deterioration of the abrasive layer. , and enables high-load machining.
また、多孔質ケイ酸カルノウム粒子３は、従来フィラー
として使用されていた硬質粒子と異なり、分散量をかな
り多くしても結合相１の強度を低下させることがないた
め、その混合量を変えることにより結合相Ｉの強度を広
い範囲で無段階に調節でき、特定の被削材および研削条
件に適合させることが可能である。Furthermore, unlike the hard particles conventionally used as fillers, the porous carnoum silicate particles 3 do not reduce the strength of the binder phase 1 even if the amount of dispersion is considerably increased. This makes it possible to steplessly adjust the strength of the bonding phase I over a wide range and adapt it to specific workpiece materials and grinding conditions.
なお、砥石成形に先立ち、多孔質ケイ酸カルノウム粉末
に予め研削液や研削油、あるいはステアリン酸カルシウ
ム等の潤滑性物質を含浸しておくことも可能である。こ
の場合、研削面において多孔質ケイ酸カルシウム粒子が
破壊されると、含まれていた研削液または研削油、潤滑
性物質が放出されるため、被削材と研削面との潤滑性を
高めて研削抵抗の低減が図れる。In addition, it is also possible to previously impregnate the porous carnoum silicate powder with a grinding fluid, grinding oil, or a lubricating substance such as calcium stearate prior to forming the grindstone. In this case, when the porous calcium silicate particles are destroyed on the grinding surface, the grinding fluid, grinding oil, and lubricating substances contained therein are released, increasing the lubricity between the workpiece and the grinding surface. Grinding resistance can be reduced.
また、多孔質ケイ酸カルソウム粉末に予め発泡剤を担持
させることにより、砥粒層の気孔率を一層高めることが
できる。Furthermore, by allowing the porous calcium silicate powder to support a foaming agent in advance, the porosity of the abrasive layer can be further increased.
また、予め多孔質ケイ酸カルシウム粒子に周知の造粒処
理を施し、大径化した後、これら複合粒子を砥石製造に
使用してもよい。こうすれば、粒子が脱落した跡に形成
されるチップポケットが大きくなり、切粉排出性等が桁
対的？こ向上する。Furthermore, after the porous calcium silicate particles are subjected to a well-known granulation process to increase their diameter, these composite particles may be used for manufacturing a grindstone. By doing this, the chip pockets formed at the spots where the particles have fallen out will become larger, and the chip evacuation performance will be improved by an order of magnitude. This will improve.
さらに、砥粒層には多孔質ケイ酸カルシウム粉末たけで
なく、必要に応じてグラファイト粉、ｈＢＮ粉等の固体
潤滑剤や、Ｓ ＩＣＳＡ ＩｙＯｓ等の硬質粒子あるい
は硬質繊維、さらｊこは金属粉等の熱伝導性や電気伝導
性の高い物質を添加してもよい。In addition, the abrasive layer contains not only porous calcium silicate powder, but also solid lubricants such as graphite powder and hBN powder, hard particles or hard fibers such as SICSA IyOs, and metal powder as needed. A substance with high thermal conductivity or electrical conductivity may be added.
Ｆ実施ＮＪ 以下、実施例を挙げて本発明の効果を実証する。F implementation NJ Hereinafter, the effects of the present invention will be demonstrated by giving examples.
（実施例１ン
多孔質ケイ酸カルシウム粉末を添加したカップ型砥石を
以下の条件で製造した。(Example 1) A cup-shaped grindstone to which porous calcium silicate powder was added was manufactured under the following conditions.
砥粒層寸法、外径３００ｘｚ、砥＃ｉ層幅１５ｘｘダイ
ヤモンド砥粒の粒径：＃２７０
砥粒集中度ニア５
＃Ｉ脂結合剤：ポリイミド樹脂
多孔質ケイ酸カルシウム粉末の主成分組成：Ｓ＋Ｏｐ：
６０ｗｔ％ ＣａＯ：２５ｗｔ％Ａｌｔｏｓ： ０．
５ｗｔ％
同粉末の平均粒径：２５μｌ
多孔質ケイ酸カルシウム粉末混合ｆｉｌＯｖｏ１％ホッ
トプレス：３７０℃Ｘ２０分
２００ ｋｇ／ｃｍ’
（比較例１）
実施例】と同寸法で、多孔質ケイ酸カルシウム粉末を加
えない点以外は、全て上記と同じカップ型砥石を作成し
た。Abrasive layer dimensions, outer diameter 300xz, abrasive #i layer width 15xx diamond abrasive grain size: #270 abrasive grain concentration near 5 #I fat binder: polyimide resin Main component composition of porous calcium silicate powder: S+Op :
60wt% CaO: 25wt% Altos: 0.
5wt% Average particle size of the same powder: 25 μl Porous calcium silicate powder mixed filOvo 1% hot press: 370°C x 20 minutes 200 kg/cm' (Comparative Example 1) Porous calcium silicate powder with the same dimensions as Example] A cup-shaped whetstone was made that was the same as above, except that no .
そして上記２つの砥石を用いて、次いてこの砥石を、Ｔ
ｉＣ系サーメツト製のスローアウェイチップの側面研削
に用い、研削比および研削盤の消費電力を測定した。研
削条件は以下の通りである。Then, using the above two whetstones, this whetstone is
It was used for side surface grinding of an indexable insert made of iC-based cermet, and the grinding ratio and power consumption of the grinder were measured. The grinding conditions are as follows.
研削様式：平面研削
砥石周速： Ｉ ０００ ｊ！／ｍｉｎ切り込み：
０．００５■
ワーク揺動速度：３１／屈ｉｎ
研削液：ケミカルソリューション５０倍希釈液’７−ク
ノ被研削面１：５ｘｚｘ１２ｚｚその結果を第１表に示
す。Grinding style: Surface grinding Wheel speed: I 000 j! /min cutting depth:
0.005 ■ Workpiece swing speed: 31/in Grinding fluid: Chemical solution 50 times diluted solution '7-kuno Surface to be ground 1: 5xzx12zz The results are shown in Table 1.
電力が向上し、研削比が向上できた。また、砥粒の過剰
脱落を防いで切れ味を高めた分、砥石駆動力も低減でき
た。The power was improved and the grinding ratio was improved. In addition, by preventing excessive shedding of abrasive grains and improving sharpness, the driving force of the whetstone was also reduced.
（実施例２）
多孔質ケイ酸カルシウム粉末を添加したホイール型砥石
を以下の条件で製造した。(Example 2) A wheel-type grindstone to which porous calcium silicate powder was added was manufactured under the following conditions.
寸法：外径２００ｘｘＸ砥粒層幅１５ｘｚ砥粒：ダイヤ
モンド
粒径： ＃１２０ 集中度：５０
結合剤：ポリイミド樹脂
多孔質ケイ酸カルシウム粉末の混合量：２０ｖｏ１％（
組成は実施例１と同じであるが、ステアリン酸Ｎａを２
ＶＯＩ％担持させた）
ホットプレス：３９０℃×３０分
２００ ｋｇ／ ｃｍ’
（比較例２）
実施例２と同寸法で、多孔質ケイ酸カルシウム粉末を加
えない直辺外は、条件を全て実施例２と等しくしてスト
レート砥石を作成した。Dimensions: Outer diameter 200xxX Abrasive layer width 15xx Abrasive grain: Diamond Particle size: #120 Concentration degree: 50 Binder: Polyimide resin Mixing amount of porous calcium silicate powder: 20vo1% (
The composition is the same as in Example 1, but with 2% Na stearate.
(VOI% supported) Hot press: 390°C x 30 minutes 200 kg/cm' (Comparative Example 2) Same dimensions as Example 2, except for the straight line without adding porous calcium silicate powder, all conditions were implemented. A straight grindstone was prepared in the same manner as in Example 2.
上記２つの砥石をそれぞれ用いて、超硬材（Ｋ２Ｏ）の
クリープフィード研削を行った。研削条件は以下の通り
である。Creep-feed grinding of superhard material (K2O) was performed using each of the above two grindstones. The grinding conditions are as follows.
砥石周速： １３００ ｘ／ｓｉｎ。Grinding wheel peripheral speed: 1300 x/sin.
切り込み：０．０２５ｚｚ
クロススピード：２１友／ｐａｓｓ
テーブルの送り速度：５ｘ／ｓｉｎ
研削液：ケミカルソリューシ３ン５０倍希釈液ワークの
被研削面積： １００ｘｉｘ１００ｚｘ総研削除去量
：１０ｃ＊’
そして研削比、研削盤Ｉ、：要した消費電力、研削後の
砥粒層のエツジの曲率を計測した。その結果を第２表に
示す。Depth of cut: 0.025zz Cross speed: 21 friends/pass Table feed rate: 5x/sin Grinding fluid: Chemical solution 3x 50 times diluted solution Workpiece area to be ground: 100xix100zx Total amount removed by grinding: 10c*' And grinding ratio, Grinding machine I: The required power consumption and the curvature of the edge of the abrasive layer after grinding were measured. The results are shown in Table 2.
第２表
上表から明らかなように、実施例２では研削比が１５倍
に向上でき、消費電力も低減できた。As is clear from the upper table of Table 2, in Example 2, the grinding ratio could be improved by 15 times, and the power consumption could also be reduced.
またエツジの型崩れも比較例２の砥石に比して少なかっ
た。In addition, the shape of the edge was less likely to deteriorate than that of the whetstone of Comparative Example 2.
「発明の効果ｊ
以上説明したように、本発明に係わる多孔質レノンボン
ド砥石およびその製造方法によれば、以下のような優れ
た効果が得られる。``Effects of the Invention j'' As explained above, according to the porous Lennon bond grindstone and the manufacturing method thereof according to the present invention, the following excellent effects can be obtained.
■ 樹脂結合相に分散された多孔質ケイ酸カルシウム粒
子が多数の内部気孔を有し、これら内部気孔に結合相が
複雑に侵入した状態で固化しているので、粒子と結合相
との接触面積が極めて大きいうえ、多孔質ケイ酸カルシ
ウム粒−子と樹脂結合相とは馴染み性（ａれ性）が良好
であるから、これら粒子を介在して結合相が強固な３次
元構造を作り、この良好な架橋作用により結合相そのも
のの強度を大幅に高めることができる。これにより、研
削面Ｉこおける結合相の過剰摩耗を防止し、砥ｖｉ保持
力を高めて超砥粒の早すぎる脱落を防止するとともに、
砥粒層の型崩れを低減して、従来は困難だったレジンボ
ンド砥石による高精度の形状付与が可能となる。■ The porous calcium silicate particles dispersed in the resin binder phase have many internal pores, and the binder phase is solidified in a complicated manner into these internal pores, so the contact area between the particles and the binder phase is small. is extremely large, and the porous calcium silicate particles and the resin binder phase have good compatibility (abrasion resistance), so the binder phase forms a strong three-dimensional structure through these particles, and this The strength of the bonded phase itself can be significantly increased due to the good crosslinking effect. This prevents excessive wear of the bonding phase on the grinding surface I, increases the abrasive retention force, and prevents the superabrasive grains from falling off too quickly.
By reducing the shape loss of the abrasive grain layer, it becomes possible to create highly accurate shapes using resin bonded grindstones, which was previously difficult.
■ 上記のような結合相の強度向上効果か得られるにも
拘わらず、多孔質ケイ酸カルシウム粒子そのものは比較
的脆性を有するから、研削面で露出した粒子は結合相の
摩耗に伴ない適度に破壊され脱落していき、その跡にチ
ップポケットが形成される。こうして研削面に多数生じ
たチップポケットにより、切粉の排出性および研削液の
保持性が大幅に向上し、砥石の目詰まり防止効果が得ら
れる。また、多孔質ケイ酸カルシウム粒子の保水性によ
る冷却効果により、砥粒層の研削熱による温度上昇が抑
制されるため、樹脂の軟質化および流動化による溶着性
および研削抵抗の増大を防止でき、併せて研削比を高め
ることが可能である。■ Despite the above-mentioned strength-enhancing effect of the binder phase, the porous calcium silicate particles themselves are relatively brittle, so the particles exposed on the grinding surface will weaken as the binder phase wears away. They break down and fall off, forming chip pockets in their wake. The large number of chip pockets thus generated on the grinding surface greatly improves the ability to discharge chips and retain the grinding fluid, thereby providing the effect of preventing clogging of the grindstone. In addition, the cooling effect of the porous calcium silicate particles due to their water-retaining properties suppresses the temperature rise caused by the grinding heat of the abrasive grain layer, which prevents increases in weldability and grinding resistance due to softening and fluidization of the resin. At the same time, it is possible to increase the grinding ratio.
■ 多孔質ケイ酸カルシウム粒子は、従来フィラ−とし
て使用されていた硬質粒子と異なり、分散量をかなり多
くしても結合相の強度を低下させることがないため、そ
の混合量を変えることにより結合相の強度を広い範囲で
無段階に調節でき、特定の被削材および研削条件に適合
させることが可能である。■ Porous calcium silicate particles, unlike the hard particles conventionally used as fillers, do not reduce the strength of the binder phase even when dispersed in a considerably large amount; The strength of the phase can be adjusted steplessly over a wide range and can be adapted to specific workpiece materials and grinding conditions.
■ 予め多孔質ケイ酸カルシウム粒子に周知の造粒処理
を施し、大径化した場合Ｊこは、これら粒子が脱落した
跡に形成されるチップポケットが大きくなり、切粉排出
性等が相対的に向上する。■ If porous calcium silicate particles are subjected to a well-known granulation process in advance to increase their diameter, the chip pockets formed at the spots where these particles have fallen out will become larger, and the chip evacuation performance will be relatively poor. improve.
第１図および第２図は本発明に係わる多孔質レジンボン
ド砥石の横断面および縦断面の拡大図である。
１・・・金属結合相、 ２・・・超砥粒、３・・・
多孔質ケイ酸カルシウムセ子。FIGS. 1 and 2 are enlarged cross-sectional and vertical cross-sectional views of a porous resin-bonded grindstone according to the present invention. 1... Metal bonding phase, 2... Super abrasive grain, 3...
Porous calcium silicate seco.
Claims (4)
するレジンボンド砥石において、 前記砥粒層中に多孔質ケイ酸カルシウム粒子を分散させ
たことを特徴とする多孔質レジンボンド砥石。(1) A resin bonded grindstone having an abrasive layer formed by dispersing superabrasive grains in a resin bonding phase, characterized in that porous calcium silicate particles are dispersed in the abrasive layer. Bond whetstone.
：５０〜８０ｗｔ％、ＣａＯ：１０〜４０ｗｔ％、Ａｌ
＿２Ｏ＿３：０．１〜５ｗｔ％を含有することを特徴と
する請求項１記載の多孔質レジンボンド砥石。(2) The porous calcium silicate powder is SiO_2
:50~80wt%, CaO:10~40wt%, Al
The porous resin-bonded grindstone according to claim 1, characterized in that it contains 0.1 to 5 wt% of _2O_3.
ウム粉末を混合し、樹脂結合剤を固化させて砥粒層を成
形することを特徴とする多孔質レジンボンド砥石の製造
方法。(3) A method for manufacturing a porous resin-bonded grindstone, which comprises mixing superabrasive grains and porous calcium silicate powder in a resin binder, solidifying the resin binder, and forming an abrasive grain layer.
立ち、この粉末に予め造粒処理を施して大径化しておく
ことを特徴とする請求項３記載の多孔質レジンボンド砥
石の製造方法。(4) The method for manufacturing a porous resin bonded grindstone according to claim 3, characterized in that, before mixing the porous calcium silicate powder, the powder is previously subjected to a granulation process to increase the diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2061822A JP2765167B2 (en) | 1990-03-13 | 1990-03-13 | Porous resin-bonded grinding wheel and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2061822A JP2765167B2 (en) | 1990-03-13 | 1990-03-13 | Porous resin-bonded grinding wheel and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03264264A true JPH03264264A (en) | 1991-11-25 |
| JP2765167B2 JP2765167B2 (en) | 1998-06-11 |
Family
ID=13182161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2061822A Expired - Lifetime JP2765167B2 (en) | 1990-03-13 | 1990-03-13 | Porous resin-bonded grinding wheel and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2765167B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010124687A (en) * | 2009-12-24 | 2010-06-03 | Totan Kako Kk | Carbon brush for electric machine |
| JP2010240751A (en) * | 2009-04-01 | 2010-10-28 | Joibondo Kk | Plastic soft composition for polishing and for surface protective material application |
| EP2042268A3 (en) * | 2007-09-28 | 2011-06-29 | Toyoda Van Moppes Ltd. | Grinding wheel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5815672A (en) * | 1981-07-21 | 1983-01-29 | Daichiku:Kk | Resinoid bonded flat shaped rotary grinding stone |
| JPS632669A (en) * | 1986-06-18 | 1988-01-07 | Toyoda Mach Works Ltd | Grinding tool |
-
1990
- 1990-03-13 JP JP2061822A patent/JP2765167B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5815672A (en) * | 1981-07-21 | 1983-01-29 | Daichiku:Kk | Resinoid bonded flat shaped rotary grinding stone |
| JPS632669A (en) * | 1986-06-18 | 1988-01-07 | Toyoda Mach Works Ltd | Grinding tool |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2042268A3 (en) * | 2007-09-28 | 2011-06-29 | Toyoda Van Moppes Ltd. | Grinding wheel |
| JP2010240751A (en) * | 2009-04-01 | 2010-10-28 | Joibondo Kk | Plastic soft composition for polishing and for surface protective material application |
| JP2010124687A (en) * | 2009-12-24 | 2010-06-03 | Totan Kako Kk | Carbon brush for electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2765167B2 (en) | 1998-06-11 |
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