JP5551040B2 - Metal bond grinding wheel - Google Patents
Metal bond grinding wheel Download PDFInfo
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- JP5551040B2 JP5551040B2 JP2010222044A JP2010222044A JP5551040B2 JP 5551040 B2 JP5551040 B2 JP 5551040B2 JP 2010222044 A JP2010222044 A JP 2010222044A JP 2010222044 A JP2010222044 A JP 2010222044A JP 5551040 B2 JP5551040 B2 JP 5551040B2
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- 238000000227 grinding Methods 0.000 title claims description 59
- 239000002184 metal Substances 0.000 title claims description 16
- 229910052751 metal Inorganic materials 0.000 title claims description 16
- 239000010941 cobalt Substances 0.000 claims description 39
- 229910017052 cobalt Inorganic materials 0.000 claims description 39
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 39
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 33
- 239000011737 fluorine Substances 0.000 claims description 33
- 229910052731 fluorine Inorganic materials 0.000 claims description 33
- 229910052628 phlogopite Inorganic materials 0.000 claims description 33
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000006061 abrasive grain Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 238000002474 experimental method Methods 0.000 description 25
- 239000002245 particle Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000013528 metallic particle Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Images
Classifications
-
- 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
Description
本発明は、ホーニング粗加工に好適なメタルボンド砥石に関する。 The present invention relates to a metal bond grindstone suitable for honing roughing.
近年、あらゆる分野において環境に対する取り組みがなされている。車両においても、燃費向上は取り組むべき重大な事項である。燃費向上対策の一つに、シリンダとピストンとの間の摩擦軽減がある。この摩擦軽減は、燃費向上だけでなく、運動性能の向上にも繋がる。 In recent years, environmental efforts have been made in all fields. Even in vehicles, improving fuel efficiency is an important issue to be addressed. One measure for improving fuel efficiency is to reduce friction between the cylinder and the piston. This friction reduction not only improves fuel consumption but also leads to improvement of exercise performance.
上述の摩擦軽減を実現するには、プラトーホーニング工法が有効である。
図６はプラトーホーニング加工が施されたシリンダの断面を拡大した模式図であり、プラトーホーニング加工が施されたシリンダ１００の表面には、無数のプラトー（丘）１０１と、隣り合うプラトー１０１、１０１の間に形成される谷１０２とが形成される。プラトー１０１の頂面１０３は面粗さを小さくして摩耗を低減させ、谷１０２に溜めたオイルで頂面１０３とピストンとの間の潤滑を維持する。この結果、摺動性と潤滑性を両立させることができる。
The plateau honing method is effective for realizing the above-mentioned friction reduction.
FIG. 6 is an enlarged schematic view of the cross section of the cylinder subjected to the plateau honing process. The surface of the
以上に述べたプラトーホーニング加工に適した砥石として、メタルボンド砥石が提案されている（例えば、特許文献１（第２頁）参照。）。 As a grindstone suitable for the plateau honing process described above, a metal bond grindstone has been proposed (see, for example, Patent Document 1 (page 2)).
特許文献１の請求項２に「焼結性メタルボンドの組成が、金属質粒子２５〜７５体積％とガラス質粒子２５〜７５体積％である請求項１に記載の超砥粒メタルボンド砥石。」の記載がある。 Claim 2 of Patent Document 1 states that “the composition of the sinterable metal bond is 25 to 75% by volume of metal particles and 25 to 75% by volume of glassy particles. Is described.
ガラス質粒子２５〜７５体積％は、崩壊してチップポケットを生成する役割を果たす。チップポケットの存在により、切り屑の排出が円滑となり、ホーニング加工が安定して行える。
ところで、ガラス質粒子と金属質粒子の配合比を検討すると、ガラス質粒子／金属質粒子＝（２５体積％／７５体積％）〜（７５体積％／２５体積％）＝０．３３〜３．０となる。
The glassy particles 25-75% by volume play a role of breaking down and generating chip pockets. Due to the presence of the chip pocket, chips are discharged smoothly and honing can be performed stably.
By the way, when the compounding ratio of the vitreous particles and the metallic particles is examined, the vitreous particles / metallic particles = (25 vol% / 75 vol%) to (75 vol% / 25 vol%) = 0.33-3. 0.
本発明者らの検討によれば、ガラス質粒子／金属質粒子が大きいほど、ガラス質粒子の崩壊、脱落が顕著になり、研削体積／摩耗体積で定義される研削比が極端に小さくなることが判明した。
チップポケットの生成が維持されつつ、研削比を高めることができる砥石が求められる。
According to the study by the present inventors, the larger the vitreous particles / metallic particles, the more conspicuous the collapse and dropout of the vitreous particles, and the grinding ratio defined by the grinding volume / wear volume becomes extremely small. There was found.
There is a need for a grindstone that can increase the grinding ratio while maintaining the generation of chip pockets.
本発明は、チップポケットの生成が維持されつつ、研削比を高めることができるメタルボンド砥石を提供することを課題とする。 An object of the present invention is to provide a metal bond grindstone capable of increasing a grinding ratio while maintaining generation of chip pockets.
請求項１に係る発明は、研削材としての砥粒と、砥石の性能を向上させるコバルト及びフッ素金雲母と、結合材とからなるメタルボンド砥石において、
前記フッ素金雲母及び前記コバルトの含有量を、フッ素金雲母：７．７５〜１９．７５体積％、コバルト：５６〜４４体積％であって、前記フッ素金雲母の体積％を前記コバルトの体積％で除した値を、０．１４〜０．２３の範囲にしたことを特徴とする。
なお、フッ素金雲母の体積％とは、メタルボンド砥石に占めるフッ素金雲母の含有率を体積％で表したものである。同様に、コバルトの体積％とは、メタルボンド砥石に占めるコバルトの含有率を体積％で表したものである。
The invention according to claim 1 is a metal bond grindstone comprising abrasive grains as a grinding material, cobalt and fluorine phlogopite for improving the performance of the grindstone, and a binder,
The fluorine phlogopite and the cobalt content are: fluorine phlogopite: 7.75 to 19.75% by volume, cobalt: 56 to 44% by volume, and the volume% of the fluorine phlogopite is the volume% of the cobalt. The value divided by is in the range of 0.14 to 0.23.
The volume% of fluorophlogopite represents the content of fluorine phlogopite in the metal bond grindstone in volume%. Similarly, the volume% of cobalt represents the content of cobalt in the metal bond grindstone in volume%.
請求項１に係る発明では、（フッ素金雲母／コバルト）＝０．１４〜０．２３とした。 In the invention according to claim 1, (fluorine phlogopite / cobalt) = 0.14 to 0.23.
フッ素金雲母の体積％をコバルトの体積％で除した値が、０．１４を下回るとチップポケットの生成が不足し、切り屑の排出性が低下するため研削能率が小さくなる。研削能率は、（研削体積／研削時間）で定義されるため、所定時間当たりの研削体積が小さくなり、研削工程が延びる。
また、フッ素金雲母の体積％をコバルトの体積％で除した値が、０．２３を超えると、研削比が小さくなる。研削比は、（研削体積／摩耗体積）で定義されるため、砥石の寿命が短くなる。
When the value obtained by dividing the volume% of the fluorophlogopite by the volume% of cobalt is less than 0.14, the generation of chip pockets is insufficient and the chip dischargeability is reduced, so that the grinding efficiency is reduced. Since the grinding efficiency is defined by (grinding volume / grinding time), the grinding volume per predetermined time is reduced and the grinding process is extended.
Further, when the value obtained by dividing the volume% of fluorophlogopite by the volume% of cobalt exceeds 0.23, the grinding ratio becomes small. Since the grinding ratio is defined by (grinding volume / wear volume), the life of the grindstone is shortened.
（フッ素金雲母／コバルト）＝０．１４〜０．２３であれば、所定の研削能率及び所定の研削比が得られ、砥石の寿命を延ばすことができると共に研削工程の短縮化を図ることができる。
すなわち、請求項１によれば、チップポケットの生成が維持されつつ、研削比を高めることができるメタルボンド砥石が提供される。
If (fluorine phlogopite / cobalt) = 0.14 to 0.23, a predetermined grinding efficiency and a predetermined grinding ratio can be obtained, the life of the grindstone can be extended and the grinding process can be shortened. it can.
That is, according to Claim 1, the metal bond grindstone which can raise a grinding ratio is provided, maintaining the production | generation of a chip pocket.
本発明の実施の形態を添付図に基づいて以下に説明する。なお、圧力に関しては次の表記を採用する。減圧状態には、絶対真空をゼロとした絶対圧を使用し、単位の後に（ａ）を記す。加圧状態には、大気圧をゼロとしたケージ圧を使用し、単位の後に（Ｇ）を記す。 Embodiments of the present invention will be described below with reference to the accompanying drawings. The following notation is adopted for pressure. In the reduced pressure state, an absolute pressure with an absolute vacuum of zero is used, and (a) is written after the unit. For the pressurized state, a cage pressure with the atmospheric pressure set to zero is used, and (G) is written after the unit.
本発明の実施例を図面に基づいて説明する。
図１に示されるように、ホットプレス１０は、水冷ジャケット１１を備え、内圧が０．９８ＭＰａ（Ｇ）まで耐える炉殻１２と、この炉殻１２の底から上向きに挿入された下部パンチ１３と、この下部パンチ１３に載せられる円筒状のダイ１４と、炉殻１２のトップから下向きに挿入され、ダイ１４に挿入される上部パンチ１５と、ダイ１４の周囲に配置される黒鉛ヒータ１６と、この黒鉛ヒータ１６を囲う断熱室１７とからなる焼結炉（耐加圧型ホットプレス）である。
Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a
下部パンチ１３の下部はシリンダ１８に挿入され、このシリンダ１８へ油圧ポンプ１９から圧油が送られると下部パンチ１３は上昇する。油圧は圧力検出手段２１で検出する。
水冷ジャケット１１へは、水ポンプ２２で給水される。この水はチラー２３に排出され、温度調節がなされた後、水ポンプ２２に戻される。
The lower part of the
黒鉛ヒータ１６は炉温制御部２５で制御される。すなわち、炉温検出手段２６で検出した温度が設定値より低い場合には、黒鉛ヒータ１６への給電量を増加し、温度が設定値より高い場合には、黒鉛ヒータ１６への給電量を減少させることにより、昇温速度の制御を含む炉温制御が可能となる。
The
また、炉殻１２には、炉内の圧力を検出する炉圧検出手段２７及び排気・加圧兼用の管２８が設けられ、この管２８に真空ポンプやエジェクターなどの排気手段２９及び不活性ガス供給源３１が接続されている。不活性ガスは、アルゴンガスや窒素ガスが入手容易である。ただし、排気手段２９と不活性ガス供給源３１とは同時に使用されることはない。
Further, the
また、炉圧検出手段２７は減圧用と加圧用とは別々に設けることが望ましいが、ここでは便宜的に共用とした。
以上に説明したホットプレス１０を用いて次に述べる実験を行った。
The furnace pressure detecting means 27 is preferably provided separately for the pressure reduction and the pressure application, but is here shared for convenience.
The following experiment was performed using the
（実験例）
本発明に係る実験例を以下に述べる。なお、本発明は実験例に限定されるものではない。
○素材：
砥粒（粒度１７０）：６．２５体積％
フッ素金雲母：７．７５〜１９．７５体積％
コバルト：５６〜４４体積％
結合材：３０体積％
(Experimental example)
Experimental examples according to the present invention will be described below. Note that the present invention is not limited to experimental examples.
○ Material:
Abrasive grains (grain size 170): 6.25% by volume
Fluorine phlogopite: 7.75 to 19.75% by volume
Cobalt: 56-44% by volume
Binder: 30% by volume
○素材充填：
上記素材を、図１のダイ１４に充填した。なお、ダイ１４の最大径は２００ｍｍである。
○排気：
炉内の空気を排除するために、図１の排気手段２９により、炉内を２０Ｐａ（ａ）又はそれ以下の圧力に減圧する。これで、酸素は殆ど除去される。
○ Material filling:
The material was filled in the
○ Exhaust:
In order to exclude the air in the furnace, the inside of the furnace is reduced to a pressure of 20 Pa (a) or lower by the exhaust means 29 of FIG. This almost removes oxygen.
○不活性ガス充填：
図１の不活性ガス供給源３１からアルゴンガスを炉内へ吹き込み、炉圧を所定の圧力に維持する。
○プレス：
図１のパンチ１３、１５により、素材に１５ＭＰａのプレス圧を付与する。
○ Inert gas filling:
Argon gas is blown into the furnace from the inert
○ Press:
A press pressure of 15 MPa is applied to the material by the
○加熱及び昇温速度：
大気温度（２５℃）から焼結温度（７４０℃）まで、１２．５℃／分の昇温速度で加熱する。７４０℃で一定時間保持することにより、焼結処理がなされる。
○ Heating and heating rate:
Heat from the atmospheric temperature (25 ° C.) to the sintering temperature (740 ° C.) at a heating rate of 12.5 ° C./min. By holding at 740 ° C. for a certain time, the sintering process is performed.
○加熱停止及び降温速度：
図１の黒鉛ヒータ１６を止める。これで、炉内及び素材の温度は下がる。降温の際には、炉内のアルゴンガスの圧力が約０．９２ＭＰａ（Ｇ）に維持されるように、炉圧検出手段２７で圧力を監視して排気手段２９、及び不活性ガス供給源３１を制御する。結果、１８．０℃／分の降温速度になった。
○ Heating stop and cooling rate:
The
得られた砥石の断面図（模式図）を、図２に示す。
砥石５０は、砥粒５１と、コバルト粒子５２と、フッ素金雲母粒子５３と、これらを結合する金属系結合材５４とからなる。
A sectional view (schematic diagram) of the obtained grindstone is shown in FIG.
The
以上の条件に加えて、フッ素金雲母の体積％とコバルトの体積％を変えながら、実験０１〜０５の砥石を得た。結果を、表１に示す。 In addition to the above conditions, the grindstones of Experiments 01 to 05 were obtained while changing the volume% of fluorine phlogopite and the volume% of cobalt. The results are shown in Table 1.
すなわち、実験０１では、砥粒６．２５体積％とフッ素金雲母７．７５体積％とコバルト粒子５６体積％と結合材３０体積％からなるメタルボンド砥石（ホーニング粗加工用砥石）を作製した。この砥石を用いて次の条件でホーニング粗加工を実施した。 That is, in Experiment 01, a metal bond grindstone (honing roughing grindstone) composed of 6.25 vol% abrasive grains, 7.75 vol% fluorine phlogopite, 56 vol% cobalt particles, and 30 vol% binder was produced. Using this grindstone, honing roughing was performed under the following conditions.
○ホーニング粗加工条件（実験０１〜０５共通）：
ホーニングヘッドに取付けた砥石の数：３枚
砥石の拡張圧力：１．３ＭＰａ
ホーニングヘッドの回転数：毎分７００回転
ホーニングヘッドの振動数：３．８Ｈｚ
ホーニングヘッドの送り速度：４５．６ｍ／分
○ Honing roughing conditions (common to Experiments 01 to 05):
Number of grinding wheels attached to the honing head: 3 Grinding wheel expansion pressure: 1.3 MPa
Honing head rotation speed: 700 rotations per minute Honing head vibration frequency: 3.8 Hz
Honing head feed rate: 45.6 m / min
以上の条件でホーニング粗加工を施し、研削比と研削能率を求めた。
砥石でワークを研削した場合に、ワークは所定の体積だけ研削除去される。この体積を研削体積と呼ぶ。また、砥石側もある程度の体積が摩耗する。この体積を摩耗体積と呼ぶ。
The honing roughing was performed under the above conditions, and the grinding ratio and grinding efficiency were determined.
When a workpiece is ground with a grindstone, the workpiece is ground and removed by a predetermined volume. This volume is called the grinding volume. Moreover, a certain amount of volume is worn on the grindstone side. This volume is called the wear volume.
（研削体積／摩耗体積）＝研削比と定義する。研削比は砥石の寿命そのものを表すので、研削比の大きな砥石、すなわち、砥石の摩耗量が少なく、ワークの研削量が大きい砥石が望まれる。 (Grinding volume / wear volume) = defined as grinding ratio. Since the grinding ratio represents the life of the grindstone itself, a grindstone with a large grinding ratio, that is, a grindstone with a small amount of wear of the grindstone and a large amount of workpiece grinding is desired.
また、ワークを一定時間で加工する時、研削体積は大きいほど生産性が高まる。そこで、研削能率＝（研削体積／加工時間）と定義する。研削能率の単位はｍｍ３／ｓｅｃとする。 In addition, when the workpiece is processed in a certain time, the productivity increases as the grinding volume increases. Therefore, it is defined that grinding efficiency = (grinding volume / processing time). The unit of grinding efficiency is mm 3 / sec.
実験０１での研削比は２４２２５であり、研削能率は７５ｍｍ３／ｓｅｃであった。
実験０２〜実験０５では、砥粒６．２５体積％と結合材３０体積％とは変えないで、フッ素金雲母の体積％とコバルト粒子の体積％とを変えて、研削比と研削能率を求めた。結果は表１に示す通りである。
The grinding ratio in Experiment 01 was 24225, and the grinding efficiency was 75 mm 3 / sec.
In Experiment 02 to Experiment 05, the grinding ratio and the grinding efficiency were obtained by changing the volume percentage of fluorine phlogopite and the volume percentage of cobalt particles without changing the abrasive grain 6.25 volume% and the binder 30 volume%. It was. The results are as shown in Table 1.
表１から明らかなように、フッ素金雲母及びコバルトの体積％を変えると、研削比が著しく変わり、研削能率が穏やかに変わることが分かった。この変化をより分かり易くするために、次のようにデータを処理する。 As is apparent from Table 1, it was found that when the volume percentages of fluorine phlogopite and cobalt were changed, the grinding ratio was remarkably changed and the grinding efficiency was changed gently. In order to make this change easier to understand, data is processed as follows.
フッ素金雲母の体積％をコバルトの体積％で除する（割る）ことで、フッ素金雲母／コバルトで表す指標を作る。
実験０１では、フッ素金雲母が７．７５体積％でコバルトが５６体積％であるから、フッ素金雲母／コバルト＝７．７５／５６＝０．１３８の計算により、０．１３８となる。
By dividing (dividing) the volume% of fluorine phlogopite by the volume% of cobalt, an index represented by fluorine phlogopite / cobalt is created.
In Experiment 01, since the fluorine phlogopite is 7.75% by volume and the cobalt is 56% by volume, the calculation of fluorine phlogopite / cobalt = 7.75 / 56 = 0.138 is 0.138.
また、表１において研削比が大きく変わっているため、最小値の５３０７（実験０５での研削比）を１．００とし、他の実験の研削比を相対比（便宜上、相対比Ａと呼ぶ。）で求めることにする。具体的には、実験０１は、研削比が２４２２５であるから、５３０７で割ることにより、４．５６を得る。すなわち、実験０１の研削比は、実験０５の研削比の４．５６倍に相当する。 In Table 1, since the grinding ratio has changed greatly, the minimum value 5307 (grinding ratio in Experiment 05) is set to 1.00, and the grinding ratio in other experiments is referred to as relative ratio (for convenience, relative ratio A). ). Specifically, since Experiment 01 has a grinding ratio of 24225, dividing by 5307 gives 4.56. That is, the grinding ratio in Experiment 01 corresponds to 4.56 times the grinding ratio in Experiment 05.
また、表１において研削能率は変化が小さいが、最小値の７５ｍｍ３／ｓｅｃ
（実験０１での研削能率）を１．００とし、他の実験の研削能率を相対比（便宜上、相対比Ｂと呼ぶ。）で求めることにする。具体的には、実験０２は、研削能率が１０３であるから、７５で割ることにより、１．３７を得る。すなわち、実験０２の研削能率は、実験０１の研削能率の１．３７倍に相当する。
In Table 1, although the grinding efficiency is small, the minimum value is 75 mm 3 / sec.
(Grinding efficiency in Experiment 01) is set to 1.00, and the grinding efficiency in other experiments is obtained by a relative ratio (referred to as relative ratio B for convenience). Specifically, in Experiment 02, since the grinding efficiency is 103, 1.37 is obtained by dividing by 75. That is, the grinding efficiency in Experiment 02 corresponds to 1.37 times the grinding efficiency in Experiment 01.
以上のデータ処理を行うことで表２が得られる。 Table 2 is obtained by performing the above data processing.
表２における、フッ素金雲母／コバルトを横軸に取り、相対比Ａを縦軸に取って描いたグラフを、図３に示す。フッ素金雲母／コバルトが増加するほど、研削比（相対比Ａ）が急減する。
フッ素金雲母はチップポケット生成要素であるが、過剰になると脱落が顕著になる。合わせて、フッ素金雲母／コバルトが増加するほど、補強作用を発揮するコバルトが減少するため、研削比が急減したと推定される。
FIG. 3 shows a graph in Table 2 in which the horizontal axis represents fluorine phlogopite / cobalt and the relative ratio A represents the vertical axis. As the amount of fluorine phlogopite / cobalt increases, the grinding ratio (relative ratio A) decreases rapidly.
Fluorophlogopite is a chip pocket generating element, but when it is excessive, dropping off becomes remarkable. In addition, it is presumed that the grinding ratio sharply decreased as the amount of fluorine phlogopite / cobalt increased and the amount of cobalt that exerted the reinforcing action decreased.
また、表２における、フッ素金雲母／コバルトを横軸に取り、相対比Ｂを縦軸に取って描いたグラフを、図４に示す。フッ素金雲母／コバルトが増加するほど、研削能率（相対比Ｂ）が穏やかに増加する。 Moreover, the graph which took the fluorine phlogopite / cobalt on the horizontal axis in Table 2 and took the relative ratio B on the vertical axis is shown in FIG. As the amount of fluorine phlogopite / cobalt increases, the grinding efficiency (relative ratio B) increases more gently.
図３と図４からでは、フッ素金雲母／コバルトの好適範囲を見出すことが難しいため、さらなるデータ処理を施すことにした。
すなわち、表２中の相対比Ａに相対比Ｂを乗じる。具体的には、実験０１では、４．５６×１．００＝４．５６の計算により、（相対比Ａ）×（相対比Ｂ）を得る。同様の処理を実験０２〜０５にも施す。結果を表３に示す。
From FIG. 3 and FIG. 4, since it is difficult to find a suitable range of fluorine phlogopite / cobalt, it was decided to perform further data processing.
That is, the relative ratio A in Table 2 is multiplied by the relative ratio B. Specifically, in Experiment 01, (relative ratio A) × (relative ratio B) is obtained by calculation of 4.56 × 1.00 = 4.56. Similar processing is performed for Experiments 02 to 05. The results are shown in Table 3.
表３における、フッ素金雲母／コバルトを横軸に取り、（相対比Ａ）×（相対比Ｂ）を縦軸に取って描いたグラフを、図５に示す。 FIG. 5 shows a graph in which the horizontal axis represents fluorophlogopite / cobalt in Table 3 and (relative ratio A) × (relative ratio B) plotted on the vertical axis.
図５から明らかなように、実験０２が最良である。実験０２でのフッ素金雲母／コバルトは、０．２０３であるから、最も好ましいフッ素金雲母／コバルトは、０．２０である。 As is apparent from FIG. 5, experiment 02 is the best. Since the fluorine phlogopite / cobalt in Experiment 02 is 0.203, the most preferable fluorine phlogopite / cobalt is 0.20.
次に良いのは実験０１であり、実験０１までを良好とすれば、実験０１の点を通る横線Ｃを引くことができる。この横線Ｃとグラフが交わった２箇所から縦線Ｄと縦線Ｅを下ろすと、縦線Ｄは０．１４の横軸目盛りで横軸と交わり、縦線Ｅは０．２３の横軸目盛りで横軸と交わる。
すなわち、フッ素金雲母／コバルトは０．１４〜０．２３であれば、良好な研削比と良好な研削能率が得られることが判明した。
Next is Experiment 01. If Experiment 01 is good, a horizontal line C passing through the points of Experiment 01 can be drawn. When the vertical line D and the vertical line E are dropped from two places where the horizontal line C and the graph intersect, the vertical line D intersects with the horizontal axis at a horizontal axis scale of 0.14, and the vertical line E is a horizontal axis scale of 0.23. Crosses the horizontal axis.
That is, it was found that if the fluorine phlogopite / cobalt is 0.14 to 0.23, a good grinding ratio and a good grinding efficiency can be obtained.
本発明は、ホーニング粗加工に用いるメタルボンド砥石に好適である。 The present invention is suitable for a metal bond grindstone used for honing roughing.
５０…メタルボンド砥石、５１…砥粒、５２…コバルト粒子、５３…フッ素金雲母粒子、５４…結合材（金属系結合材）。
DESCRIPTION OF
Claims (1)
前記フッ素金雲母及び前記コバルトの含有量を、フッ素金雲母：７．７５〜１９．７５体積％、コバルト：５６〜４４体積％であって、前記フッ素金雲母の体積％を前記コバルトの体積％で除した値を、０．１４〜０．２３の範囲にしたことを特徴とするメタルボンド砥石。 In a metal bond grindstone consisting of abrasive grains as a grinding material, cobalt and fluorine phlogopite to improve the performance of the grindstone, and a binder,
The fluorine phlogopite and the cobalt content are: fluorine phlogopite: 7.75 to 19.75% by volume, cobalt: 56 to 44% by volume, and the volume% of the fluorine phlogopite is the volume% of the cobalt. A metal bond grindstone characterized in that the value divided by is in the range of 0.14 to 0.23.
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| JP2010222044A JP5551040B2 (en) | 2010-09-30 | 2010-09-30 | Metal bond grinding wheel |
| PCT/JP2011/072249 WO2012043661A1 (en) | 2010-09-30 | 2011-09-28 | Metal-bonded grinding wheel |
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| JPS5969483A (en) * | 1982-10-07 | 1984-04-19 | 有限会社 日本グレ−ン研究所 | Ceramic bond diamond grinding stone |
| JP2000006033A (en) * | 1998-06-18 | 2000-01-11 | Osaka Diamond Ind Co Ltd | Resin bond super-abrasive grain wheel and manufacture thereof |
| JP4586704B2 (en) * | 1999-08-17 | 2010-11-24 | 三菱マテリアル株式会社 | Resin bond grinding wheel |
| JP2001246565A (en) * | 2000-02-29 | 2001-09-11 | Allied Material Corp | Super-abrasive grain tool and its manufacturing method |
| JP2002001668A (en) * | 2000-06-19 | 2002-01-08 | Mitsubishi Materials Corp | Metal bonded grinding wheel |
| JP4419299B2 (en) * | 2000-09-01 | 2010-02-24 | 三菱マテリアル株式会社 | Hybrid grinding wheel and manufacturing method thereof |
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| JP2006239834A (en) * | 2005-03-04 | 2006-09-14 | Noritake Super Abrasive:Kk | Wheel for resin bond double-end grinding |
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