JPH1170474A - Rotating grinding wheel - Google Patents

Rotating grinding wheel

Info

Publication number
JPH1170474A
JPH1170474A JP17571598A JP17571598A JPH1170474A JP H1170474 A JPH1170474 A JP H1170474A JP 17571598 A JP17571598 A JP 17571598A JP 17571598 A JP17571598 A JP 17571598A JP H1170474 A JPH1170474 A JP H1170474A
Authority
JP
Japan
Prior art keywords
grindstone
grinding
resinoid
fiber
grinding wheel
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.)
Pending
Application number
JP17571598A
Other languages
Japanese (ja)
Inventor
Kenji Yamauchi
憲司 山内
Hai Sato
菩 佐藤
Hidenori Tanizaki
英宣 谷崎
Toshiro Amo
敏郎 天羽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIYUUREJISUTON KK
Original Assignee
NIYUUREJISUTON KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NIYUUREJISUTON KK filed Critical NIYUUREJISUTON KK
Priority to JP17571598A priority Critical patent/JPH1170474A/en
Publication of JPH1170474A publication Critical patent/JPH1170474A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To shorten the manufacturing manhours by setting a fiber to a disc porous structure and by providing a resinoid grinding wheel board formed by sticking the resinoid grains to the structure. SOLUTION: A rotating grinding wheel 1 is an offset type rotating grinding wheel which is formed by joining a substrate 2 having elasticity with the top face of a resinoid grinding wheel board 3 formed of a grain-stuck fiber disc. The rotating grinding wheel 1 has a fitting hole 5 for being fitted to a rotary shaft of a disc grinder in its center part and an offset part 6 which is projected to the top face side than the grinding and polishing part in its outside is formed in the circumferential part of the fitting hole 5. The fiber disc is formed of either of a chemical fiber such as a natural fiber, a carbon fiber, and a nylon, or the combination of them into a porous structure having a void communicated with the front/rear faces.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、グラインダに装着
される回転砥石に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone mounted on a grinder.

【0002】[0002]

【従来の技術】従来より、グラインダに装着される回転
砥石として、被加工物を削り取る重研削に、より適した
回転砥石や、被加工物表面を平滑にする軽研削又は研磨
に、より適した回転砥石が種々知られている。
2. Description of the Related Art Conventionally, a rotary grindstone mounted on a grinder is more suitable for a rotary grindstone which is more suitable for heavy grinding for shaving a workpiece and for light grinding or polishing for smoothing the surface of a workpiece. Various types of rotary grindstones are known.

【0003】後者の例として、円板状レジノイド砥石の
下面に短冊形状等の複数枚の研磨布紙を放射状に配置
し、エポキシ樹脂等の接着剤により接着したものが知ら
れている(特公昭63−25915号公報)。この回転
砥石は、レジノイド砥石による研削研磨に加え、研磨布
紙による研磨を行うことができるという特徴を有する。
[0003] As an example of the latter, there is known a disk-shaped resinoid grindstone in which a plurality of strip-shaped abrasive cloths are radially arranged on the lower surface and bonded with an adhesive such as an epoxy resin (Japanese Patent Publication No. Sho-Kokyo). 63-25915). This rotary grindstone has a feature that, in addition to grinding and polishing with a resinoid grindstone, polishing with polishing cloth paper can be performed.

【0004】また、砥石板の中に芯材としてガラスクロ
スを埋設した弾性砥石が知られている。この砥石は、被
加工物表面の形状に沿うように弾性変形させることによ
り、該被加工物表面との広い接触面積を得ることがで
き、平滑化のための研削研磨性能に優れるという特徴を
有するものである。
Further, an elastic grindstone in which a glass cloth is embedded as a core material in a grindstone plate is known. This whetstone has a feature that, by being elastically deformed so as to conform to the shape of the surface of the workpiece, a large contact area with the surface of the workpiece can be obtained, and the grinding and polishing performance for smoothing is excellent. Things.

【0005】さらに、ガラスクロスのネットを円形に切
取り、これに砥粒を接着した砥石が知られている。
[0005] Further, there is known a whetstone in which a net of a glass cloth is cut out in a circular shape and abrasive grains are adhered to the cut.

【0006】[0006]

【発明が解決しようとする課題】しかしながら、前記研
磨布紙を接着した砥石は、レジノイド砥石板を製作する
ことに加え、研磨布紙を多数の短冊形状等所定の形状に
切断し前記レジノイド砥石板に放射状に並べて接着する
必要があるため、製作に手間が掛かりコストが増加する
という欠点がある。
However, in addition to manufacturing a resinoid grind plate, the grindstone to which the polishing cloth paper is bonded is cut into a predetermined shape such as a plurality of strips to form the resinoid grindstone plate. In this case, it is necessary to bond them in a radial pattern, so that there is a disadvantage that the production is troublesome and the cost is increased.

【0007】また、前記弾性砥石は、砥粒層の内部に芯
材としてガラスクロスを埋設しているので、その弾性度
は、砥石の厚みを薄くした程度でしか得られないという
欠点を有し、曲面等の研削研磨には適切でない。さら
に、前記ガラスクロスのネットに砥粒を接着した砥石
は、使用に伴う砥粒の滅失によりガラスクロスが露呈し
た後は使用できないため、寿命が短いという欠点を有す
る。
Further, since the above-mentioned elastic grindstone has a glass cloth embedded as a core material inside the abrasive grain layer, it has a drawback that its elasticity can be obtained only by reducing the thickness of the grindstone. It is not suitable for grinding and polishing of curved surfaces. Further, the grinding stone in which the abrasive grains are bonded to the net of the glass cloth cannot be used after the glass cloth is exposed due to the loss of the abrasive grains during use, and thus has a disadvantage that the life is short.

【0008】本発明は、上記のような従来技術の欠点を
解消し、被加工物表面を平滑にする軽研削又は研磨に、
より適した回転砥石であって、製作の手間とコストを軽
減できると共に使用寿命が長い回転砥石を提供すること
を目的とするものである。
The present invention solves the above-mentioned disadvantages of the prior art, and is used for light grinding or polishing for smoothing the surface of a workpiece.
It is an object of the present invention to provide a more suitable rotating grindstone, which can reduce the labor and cost of production and has a long service life.

【0009】[0009]

【課題を解決するための手段】上記目的達成のため、本
発明に係る回転砥石は、繊維を円板状の多孔組織とし、
該組織にレジノイド砥粒を付着して表裏面に連通する空
隙を有した多孔状に形成されたレジノイド砥石板を備え
ていることを特徴とする。
Means for Solving the Problems In order to achieve the above-mentioned object, a rotating grindstone according to the present invention has a fiber having a disc-shaped porous structure,
It is characterized by comprising a resinoid grindstone plate formed in a porous shape and having voids communicating with the front and back surfaces by attaching resinoid abrasive grains to the structure.

【0010】好適には、前記多孔組織を形成する繊維
は、天然繊維、炭素繊維又は化学繊維とされる。
Preferably, the fibers forming the porous tissue are natural fibers, carbon fibers or chemical fibers.

【0011】また、前記レジノイド砥石板の天面に弾性
を有する基板が接合されていることが望ましい。
It is preferable that an elastic substrate is joined to a top surface of the resinoid grindstone plate.

【0012】さらに、前記レジノイド砥石板に該砥石板
の下面からほぼ天面に達する溝が放射状に複数設けられ
ていることが望ましい。
Further, it is preferable that the resinoid grindstone plate is provided with a plurality of grooves radially extending from a lower surface of the grindstone plate to a substantially top surface.

【0013】[0013]

【発明の実施の形態】以下、本発明の実施形態を図面に
基づいて説明する。図1は本発明の一実施例に係る回転
砥石1の断面図である。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a rotary grindstone 1 according to one embodiment of the present invention.

【0014】図1において、回転砥石1は、砥粒を付着
した繊維製円板で構成されたレジノイド砥石板3の天面
に弾性を有する基板2を接合したオフセット型回転砥石
である。該回転砥石1は、ディスクグラインダの回転軸
に取り付けるための取付孔5を中心部に有しており、該
取付孔の周囲部分は、その外側の研削研磨部分よりも天
面側に凸状とされたオフセット部6を形成している。前
記繊維製円板は、天然繊維、炭素繊維及びナイロン等の
化学繊維のいずれか又はこれらの組合せにより表裏面に
連通する空隙を有した多孔組織に形成されている。
In FIG. 1, a rotary grindstone 1 is an offset rotary grindstone in which an elastic substrate 2 is joined to the top surface of a resinoid grindstone plate 3 made of a fiber disc having abrasive grains attached thereto. The rotary grindstone 1 has a mounting hole 5 at the center thereof for mounting on a rotating shaft of a disk grinder, and a peripheral portion of the mounting hole has a more convex shape on the top surface side than a grinding and polishing portion on the outside. The formed offset portion 6 is formed. The fiber disc is formed into a porous structure having voids communicating with the front and back surfaces by using one of natural fibers, carbon fibers, and chemical fibers such as nylon or a combination thereof.

【0015】重研削に近い範囲で研削を行う場合(砥粒
の粒度#60〜#120)には、研削力を大きくするた
め、砥石の押付面圧を大きくする必要がある。したがっ
て、砥石の接触面の温度は高くなりやすい。このような
場合には、250℃〜300℃程度の高温でも溶着しな
い天然繊維又は炭素繊維で繊維製円板を形成するのが有
効である。また、研磨を行う場合(砥粒の粒度#180
〜#400)には、砥石の押付面圧は小さくてよいの
で、砥石の接触面の温度は、上記重研削の場合に比べて
低くなる。したがって、この場合には、融点の低いナイ
ロン等の化学繊維で繊維性円板を形成することができ
る。研磨の際には、砥石を弾性変形させる場合が多く、
引張強度が天然繊維より大きいナイロン等は、繊維が切
断することが少ないため、研磨用砥石の繊維製円板を形
成するのに最適な繊維である。
When grinding is performed in a range close to heavy grinding (grain size # 60 to # 120), it is necessary to increase the pressing surface pressure of the grindstone in order to increase the grinding force. Therefore, the temperature of the contact surface of the grindstone tends to increase. In such a case, it is effective to form a fiber disc with natural fibers or carbon fibers that are not welded even at a high temperature of about 250 ° C. to 300 ° C. When polishing is performed (grain size # 180)
In # 400), the pressing surface pressure of the grindstone may be small, so that the temperature of the contact surface of the grindstone is lower than in the case of the heavy grinding. Therefore, in this case, a fibrous disk can be formed from chemical fibers such as nylon having a low melting point. In the case of polishing, the whetstone is often elastically deformed,
Nylon and the like having a tensile strength larger than that of natural fibers are fibers that are less likely to be cut, and thus are the most suitable fibers for forming a disk made of fibers of a grinding wheel.

【0016】前記多孔組織は、例えば、図4に示すラッ
セル編物31を基にして製作される。図4において、ラ
ッセル編物31は、10番手の木綿の単糸をたて糸31
1として形成されたチェーンステッチに、10番手の木
綿の双糸からなるよこ糸312を適切な空隙を有するよ
うに編み込んでいる。繊維製円板は、ラッセル編物31
にレジン被覆砥粒を付着し、これを複数枚重ねて接着し
て製作される。こうして製作されたレジノイド砥石板3
は、表裏面に連通する空隙を有しているため、研削研磨
時の摩擦熱を効果的に発散することができ、被加工物の
焼けを軽減するという利点が得られる。さらに、研削研
磨時に脱落した砥粒及び被加工物の研削粉が前記空隙に
排斥されるため、砥石の目詰まりが発生しにくくなり、
砥石の砥粒の被加工物表面への接触が確実に維持され研
削研磨性能が長期間保持される。また、この例では、レ
ジノイド砥石板3の天面に弾性を有する基板2を接合し
た構成としているため、被加工物表面の形状に沿わせて
使用することができ、表面平滑化のための研削研磨性能
に優れる。なお、本実施例の繊維製円板は木綿糸による
ラッセル編物31を用いているが、その他の編物又は平
織りその他の製織法を用いた織物でも良く、木綿以外の
天然繊維を用いても良い。また、前記編物31を一枚の
み使用して繊維製円板を形成することも可能である。
The porous structure is manufactured based on, for example, a Russell knit 31 shown in FIG. In FIG. 4, the Russell knit 31 is made of a 10th cotton single yarn and a warp 31.
In the chain stitch formed as 1, a weft yarn 312 made of 10th cotton double yarn is knitted so as to have an appropriate gap. The fiber disk is a Russell knit 31
Is manufactured by adhering resin-coated abrasive grains to a plurality of sheets and laminating and adhering a plurality of the resin-coated abrasive grains. Resinoid grinding stone plate 3 manufactured in this way
Has an opening communicating with the front and back surfaces, so that frictional heat during grinding and polishing can be effectively dissipated, and the advantage of reducing burning of the workpiece can be obtained. Furthermore, since the abrasive particles and the grinding powder of the workpiece that have fallen off during the grinding and polishing are rejected to the gap, clogging of the grinding wheel is less likely to occur,
The contact of the abrasive grains of the grindstone with the surface of the workpiece is reliably maintained, and the grinding and polishing performance is maintained for a long period of time. Further, in this example, since the elastic substrate 2 is joined to the top surface of the resinoid grindstone plate 3, it can be used according to the shape of the surface of the workpiece, and can be used for grinding for surface smoothing. Excellent polishing performance. Although the fiber disk of the present embodiment uses the Russell knit 31 made of cotton yarn, other knits or plain weaves or other woven fabrics may be used, or natural fibers other than cotton may be used. It is also possible to form a fiber disc using only one knit 31.

【0017】また、前記繊維製円板を図5に示す立体編
物32とすることも可能である。図5において、立体編
物32は、たて糸321、322を10番手の木綿の単
糸又は強度を上げるためにガラスクロス混紡糸とし、よ
こ糸323を10番手の木綿の双糸として形成されてい
る。たて糸321からなるチェーンステッチとたて糸3
22からなるチェーンステッチは、互いに厚み方向に平
行に配置され、各チェーンステッチ間によこ糸323が
編み込まれている。繊維製円板をこのような立体編物と
した場合には、円板の厚み方向へ延びようとする弾性力
により、円板の側面(図5において紙面の左右方向に相
当)にも、より広い空隙を有することになり、研削研磨
時の摩擦熱をより効果的に発散することができる。ま
た、編物一枚あたりの厚みが大きくなるため、前記ラッ
セル編物を複数枚重ねて接着する場合よりも少ない枚数
で所定の砥石の厚みを得ることができ、製作の手間が軽
減される。
Further, the fiber disk may be a three-dimensional knitted fabric 32 shown in FIG. In FIG. 5, the three-dimensional knitted fabric 32 is formed such that the warp yarns 321 and 322 are single yarns of 10th cotton or a glass cloth blended yarn for increasing the strength, and the weft yarn 323 is a double yarn of 10th cotton. Chain stitch made of warp yarn 321 and warp yarn 3
The chain stitches 22 are arranged parallel to each other in the thickness direction, and weft yarns 323 are woven between the chain stitches. When the fiber disk is made into such a three-dimensional knitted fabric, the side surface of the disk (corresponding to the horizontal direction in FIG. 5) also has a wider width due to the elastic force that extends in the thickness direction of the disk. Since it has voids, frictional heat during grinding and polishing can be more effectively dissipated. Further, since the thickness per one knitted fabric is increased, the thickness of a predetermined grindstone can be obtained with a smaller number of pieces than in the case where a plurality of the Russell knitted fabrics are adhered to each other, and the labor for manufacturing is reduced.

【0018】基板2は、レジノイド砥石3の保形性を強
化するものであり、例えば、積層ガラスクロス、厚紙、
樹脂成型品等で形成され、必要に応じて弾性変形性を有
したものとされる。基板2の径はレジノイド砥石3と同
じとするか、或いは保形性を付与し得る範囲で小さいも
のとされる。また、レジノイド砥石板3の空隙による冷
却作用をより有効とするため、基板2は、多数の小孔を
設けたもの、或いは多孔質のものとすることができる。
The substrate 2 reinforces the shape retention of the resinoid grindstone 3 and includes, for example, laminated glass cloth, cardboard,
It is formed of a resin molded product or the like, and has elastic deformation as required. The diameter of the substrate 2 is the same as that of the resinoid grindstone 3, or is small as long as shape retention can be imparted. Further, in order to make the cooling action by the voids of the resinoid grinding stone plate 3 more effective, the substrate 2 may be provided with a large number of small holes or may be porous.

【0019】図2は図1の回転砥石1の裏面を、図3は
図2のA−A線に沿う断面を示す。図2、図3に示すよ
うに、レジノイド砥石板3には、該砥石3の下面からほ
ぼ天面に達する溝4が放射状に複数設けられている。溝
4を有した砥石板3は、繊維製円板にレジンで被覆した
砥粒を付着させ、成形する際に前記溝4に対応する凸部
を有する金型で押圧し、焼成することにより形成され
る。回転砥石1の研削研磨性能は前記溝4によりさらに
向上する。すなわち、砥石1の回転中に前記溝4のエッ
ジ部41が被加工面に当たり、例えば、溶接ビードのよ
うな比較的大きな凸部をも効果的に研削研磨することが
できる。また、前記溝4はレジノイド砥石板の下面から
ほぼ天面に達するように設けられているので、レジノイ
ド砥石板3が滅失するまで存在し、優れた研削研磨性能
を長期間維持することができる。なお、本実施例は、望
ましい実施形態としてレジノイド砥石板3に溝4が設け
られた場合を示しているが、溝4を省略することも可能
である。溝4が無い場合、或いは浅い場合には、図6に
示すようにレジノイド砥石板3のみからなる回転砥石1
としても良く、基板2をなくすことにより、さらに弾性
変形し易い回転砥石とすることができる。
FIG. 2 shows a back surface of the rotary grindstone 1 of FIG. 1, and FIG. 3 shows a cross section taken along line AA of FIG. As shown in FIGS. 2 and 3, the resinoid grindstone plate 3 is provided with a plurality of radially extending grooves 4 extending from the lower surface of the grindstone 3 to the top surface. The grindstone plate 3 having the groove 4 is formed by adhering abrasive grains coated with a resin to a fiber disc, pressing the mold with a mold having a convex portion corresponding to the groove 4, and baking it. Is done. The grinding and polishing performance of the rotary grindstone 1 is further improved by the grooves 4. That is, the edge 41 of the groove 4 hits the surface to be processed while the grindstone 1 is rotating, and for example, a relatively large convex portion such as a weld bead can be effectively ground and polished. Further, since the groove 4 is provided so as to reach almost the top surface from the lower surface of the resinoid grindstone plate, the groove 4 exists until the resinoid grindstone plate 3 is lost, so that excellent grinding and polishing performance can be maintained for a long time. This embodiment shows a case in which the groove 4 is provided in the resinoid grindstone plate 3 as a preferred embodiment, but the groove 4 can be omitted. When there is no groove 4 or when the groove is shallow, as shown in FIG.
By removing the substrate 2, a rotating grindstone that is more easily deformed elastically can be obtained.

【0020】[0020]

【実施例】以下、本発明に係る回転砥石と従来の回転砥
石との比較により、本発明の有効性をさらに明確にす
る。本発明の実施例及び従来技術による比較例として、
以下の仕様の砥石を作成し、両砥石の研削研磨性能を比
較した。
EXAMPLES The effectiveness of the present invention will be further clarified by comparing a rotary grindstone according to the present invention with a conventional rotary grindstone. As an example of the present invention and a comparative example according to the prior art,
Grindstones having the following specifications were prepared, and the grinding and polishing performances of both grindstones were compared.

【0021】(1)実施例 a)砥石板:直径100mm、厚さ1〜3mm b)砥粒 :A砥粒、粒径#60〜#400 c)芯材 :木綿、ラッセル編み d)基板 :木綿、デニム織り、直径100mm、厚さ
1〜1.5mm (2)比較例 a)砥石板:直径100mm、厚さ2〜3mm b)砥粒 :A砥粒、粒径#60〜#400 c)芯材 :ナイロン、不織布 d)基板 :合成繊維、直径100mm、厚さ2〜3m
m (3)研削研磨性能比較試験 被研削研磨面としてステンレス304を用いた。上記両
仕様の砥石を研削ロボットに取付け、砥石の押付力を一
定にした状態で、水平方向での10分間の平行動作の研
削研磨試験を行った。被研削研磨面については、Ra表
面粗さ測定器により表面粗さを測定した。また、電子秤
り(精度±0.1g)により、被研削面の研削量(ステ
ンレス304の重量減少)を測定した。
(1) Examples a) Grindstone plate: diameter 100 mm, thickness 1 to 3 mm b) Abrasive particles: A abrasive particles, particle size # 60 to # 400 c) Core material: cotton, Russell knitting d) Substrate: Cotton, denim weave, diameter 100 mm, thickness 1 to 1.5 mm (2) Comparative example a) Grindstone plate: diameter 100 mm, thickness 2 to 3 mm b) Abrasive grains: A abrasive grains, particle size # 60 to # 400 c ) Core material: Nylon, non-woven fabric d) Substrate: Synthetic fiber, diameter 100mm, thickness 2-3m
m (3) Grinding / polishing performance comparison test Stainless steel 304 was used as the grinding / polishing surface. A grindstone of both specifications was mounted on a grinding robot, and a grinding / polishing test of a parallel operation for 10 minutes in a horizontal direction was performed with the pressing force of the grindstone kept constant. The surface to be ground and polished was measured for surface roughness by a Ra surface roughness measuring instrument. The amount of grinding of the surface to be ground (reduction in weight of stainless steel 304) was measured by electronic weighing (accuracy ± 0.1 g).

【0022】図7及び図8に、本発明の実施例に係る回
転砥石(図中(a)で示す)と比較例の回転砥石(図中
(b)で示す)の研削研磨性能を比較した結果の一例を
示す。図7は、回転砥石の砥粒の粒度と、研削研磨後の
被加工面の表面粗さとの関係を示し、図8は、図7と同
一の条件下での研削研磨面後の被加工面の表面粗さと研
削量との関係を示す。
FIGS. 7 and 8 show the grinding and polishing performance of the rotary grindstone (shown by (a) in the figure) according to the embodiment of the present invention and the rotary grindstone of the comparative example (shown by (b) in the figure). An example of the result is shown. FIG. 7 shows the relationship between the grain size of the abrasive grains of the rotary grindstone and the surface roughness of the work surface after grinding and polishing. FIG. 8 shows the work surface after the grinding and polishing surface under the same conditions as in FIG. Shows the relationship between the surface roughness of the sample and the amount of grinding.

【0023】図7に示すように、同一粒度の砥粒を用い
て研削研磨した場合、本発明の実施例に係る回転砥石
は、従来の回転砥石に比べ、研削研磨後の表面粗さが密
となった。これは、以下の理由によるものと考えること
ができる。すなわち、砥粒の粒度が同一であっても、本
発明の回転砥石は、弾性変形し易いため、従来の回転砥
石に比べ、被研削物への砥石の接触面積が広くなる。し
たがって、押付力が一定であれば、接触面圧は小さくな
る。接触面圧が小さいと砥粒の食い込み量が小さくなる
ので被研削面は滑らかになるというものである。また、
砥粒により研削された部分に繊維が当たると、研削され
た部分のエッジのかえり等が繊維によりバフ仕上げと同
じように取り除かれるため、被研削面が滑らかになると
いう理由も考えられる。図7に示す結果は、本発明の回
転砥石が従来の回転砥石に比べ、粒度の大きな砥石を用
いても被研削研磨面をより緻密な表面粗さとし得る点
で、優れた研削研磨性能を有することを意味する。
As shown in FIG. 7, when grinding and polishing are performed using abrasive grains having the same particle size, the rotating grindstone according to the embodiment of the present invention has a higher surface roughness after grinding and polishing than a conventional rotating grindstone. It became. This can be attributed to the following reasons. That is, even if the grain size of the abrasive grains is the same, the rotating grindstone of the present invention is easily elastically deformed, so that the contact area of the grindstone with the object to be ground is larger than that of the conventional rotating grindstone. Therefore, if the pressing force is constant, the contact surface pressure decreases. If the contact surface pressure is small, the amount of the abrasive grains to be cut is small, so that the surface to be ground becomes smooth. Also,
When the fiber hits the portion ground by the abrasive grains, the burrs of the edge of the ground portion are removed by the fiber in the same manner as in the buffing, so that the ground surface may be smooth. The results shown in FIG. 7 show that the rotary grindstone of the present invention has excellent grinding and polishing performance in that the surface to be polished can have a finer surface roughness even when using a grindstone having a large grain size as compared with the conventional rotary whetstone. Means that.

【0024】また、図8に示すように、上記条件におい
て、同一の表面粗さとなるように研削研磨した場合、本
発明の実施例に係る回転砥石の方が比較例の回転砥石に
比べて単位時間当たりの研削量が多かった。これは、本
発明の実施例に係る回転砥石が比較例の回転砥石に比
べ、所定の表面粗さを得るのに必要な研削研磨時間を短
縮し得ることを意味する。
Further, as shown in FIG. 8, when the grinding wheel is ground and polished so as to have the same surface roughness under the above-mentioned conditions, the rotating grindstone according to the embodiment of the present invention has a unit size greater than that of the comparative grindstone. The amount of grinding per hour was large. This means that the grinding wheel according to the example of the present invention can reduce the grinding and polishing time required to obtain a predetermined surface roughness as compared with the grinding wheel of the comparative example.

【0025】[0025]

【発明の効果】このように本発明に係る回転砥石は、繊
維を円板状の多孔組織とし、該組織にレジノイド砥粒を
付着して形成されたレジノイド砥石板を備えるため、砥
石表面の砥粒による研削研磨に加え、砥粒が滅失した際
に表面に顕れる前記繊維による優れた研磨性能を奏す
る。したがって、従来の砥石のように複数の研磨布紙を
短冊形状等に切断し接着するという工程が不要であり、
製作工数が短縮されると共にコストを軽減することが可
能となる。
As described above, the rotary grindstone according to the present invention is provided with a resinoid grindstone plate formed by forming fibers into a disk-shaped porous structure and adhering resinoid abrasive grains to the structure. In addition to grinding and polishing by the grains, excellent polishing performance by the fibers appearing on the surface when the abrasive grains are lost is exhibited. Therefore, there is no need to cut and bond a plurality of abrasive cloths into a strip shape or the like as in a conventional grindstone,
The number of manufacturing steps can be reduced, and the cost can be reduced.

【0026】また、前記ガラスクロスのネットに砥粒を
接着した砥石等が該ガラスクロスが露呈するまでしか使
用できないのと異なり、本発明に係る砥石は前記繊維が
磨滅するまで使用でき、長寿命である。
Also, unlike a grinding stone or the like in which abrasive grains are bonded to the net of the glass cloth can be used only until the glass cloth is exposed, the grinding stone according to the present invention can be used until the fibers are worn out, and has a long life. It is.

【0027】また、レジノイド砥石板が表裏面に連通す
る空隙を有した多孔状に形成されているため、研削研磨
時の摩擦熱を効果的に発散することができ、被加工面に
融着するおそれがない。特に、前記繊維製円板が立体編
みにより形成された編物である場合には、該円板の側面
にも十分に大きな空隙を有するため、摩擦熱をより効果
的に発散することができる。
Further, since the resinoid grindstone plate is formed in a porous shape having a void communicating with the front and back surfaces, frictional heat during grinding and polishing can be effectively dissipated and is fused to the surface to be processed. There is no fear. In particular, when the fiber disk is a knitted article formed by three-dimensional knitting, a sufficiently large gap is also provided on the side surface of the disk, so that frictional heat can be more effectively dissipated.

【0028】さらに、前記繊維製円板に該円板の下方か
らほぼ天面に達する溝が放射状に複数設けられている場
合には、溝のエッジによる効果的な研削研磨が可能であ
る。
Further, when the fiber disk is provided with a plurality of radially extending grooves reaching the top surface from below the disk, effective grinding and polishing can be performed by the edges of the grooves.

【図面の簡単な説明】[Brief description of the drawings]

【図1】図1は、本発明の1実施例に係るオフセット型
回転砥石の縦断面図である。
FIG. 1 is a longitudinal sectional view of an offset-type rotary grindstone according to one embodiment of the present invention.

【図2】図2は、図1の回転砥石の背面図である。FIG. 2 is a rear view of the rotary grindstone of FIG. 1;

【図3】図3は、図2のA−A線に沿う断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 2;

【図4】図4は、図1の繊維製円板を形成する一例であ
るラッセル編物を示す。
FIG. 4 shows a Russell knit which is an example of forming the fiber disc of FIG.

【図5】図5は、図1の繊維製円板を形成する一例であ
る立体編物の斜視図である。
FIG. 5 is a perspective view of a three-dimensional knitted fabric which is an example of forming the fiber disc of FIG. 1;

【図6】図6は、本発明の他の実施例に係るオフセット
型回転砥石の縦断面図である。
FIG. 6 is a vertical sectional view of an offset rotary grindstone according to another embodiment of the present invention.

【図7】図7は、従来の回転砥石との比較において、本
発明に係る回転砥石の一実施例における、回転砥石の砥
粒の粒度と研削研磨後の被加工面の表面粗さとの関係を
示す。
FIG. 7 is a graph showing the relationship between the grain size of abrasive grains of a rotary grindstone and the surface roughness of a processed surface after grinding and polishing in one embodiment of the rotary grindstone according to the present invention, in comparison with a conventional rotary grindstone. Is shown.

【図8】図8は、従来の回転砥石との比較において、本
発明に係る回転砥石の一実施例における、研削研磨後の
被加工面の表面粗さと研削量との関係を示す。
FIG. 8 shows the relationship between the surface roughness of the work surface after grinding and polishing and the amount of grinding in one embodiment of the rotating grindstone according to the present invention, in comparison with a conventional rotating grindstone.

【符号の説明】[Explanation of symbols]

1 回転砥石 2 基板 3 レジノイド砥石板 4 溝 31 ラッセル編物 32 立体編物 41 エッジ部 DESCRIPTION OF SYMBOLS 1 Rotary grindstone 2 Substrate 3 Resinoid grindstone plate 4 Groove 31 Russell knitting 32 Solid knitting 41 Edge part

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 繊維を円板状の多孔組織とし、該組織に
レジノイド砥粒を付着して表裏面に連通する空隙を有し
た多孔状に形成されたレジノイド砥石板を備えているこ
とを特徴とする回転砥石。
The present invention is characterized by comprising a porous resinous grindstone plate having a disc-shaped porous structure, a resinoid abrasive grain attached to the structure, and a void communicating with the front and back surfaces. And a rotating whetstone.
【請求項2】 前記多孔組織を形成する繊維が、天然繊
維であることを特徴とする請求項1に記載の回転砥石。
2. The rotating grindstone according to claim 1, wherein the fibers forming the porous structure are natural fibers.
【請求項3】 前記多孔組織を形成する繊維が、炭素繊
維であることを特徴とする請求項1に記載の回転砥石。
3. The rotating grindstone according to claim 1, wherein the fibers forming the porous structure are carbon fibers.
【請求項4】 前記多孔組織を形成する繊維が、化学繊
維であることを特徴とする請求項1に記載の回転砥石。
4. The rotating grindstone according to claim 1, wherein the fibers forming the porous structure are chemical fibers.
【請求項5】 前記レジノイド砥石板の天面に弾性を有
する基板を接合したことを特徴とする請求項1から4の
いずれかに記載の回転砥石。
5. The rotating grindstone according to claim 1, wherein an elastic substrate is bonded to a top surface of the resinoid grindstone plate.
【請求項6】 前記レジノイド砥石板に該砥石板の下面
からほぼ天面に達する溝が放射状に複数設けられている
ことを特徴とする請求項5に記載の回転砥石。
6. The rotary grindstone according to claim 5, wherein the resinoid grindstone plate is provided with a plurality of radially extending grooves from the lower surface of the grindstone plate to the top surface.
JP17571598A 1997-06-23 1998-06-23 Rotating grinding wheel Pending JPH1170474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17571598A JPH1170474A (en) 1997-06-23 1998-06-23 Rotating grinding wheel

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9-166220 1997-06-23
JP16622097 1997-06-23
JP17571598A JPH1170474A (en) 1997-06-23 1998-06-23 Rotating grinding wheel

Publications (1)

Publication Number Publication Date
JPH1170474A true JPH1170474A (en) 1999-03-16

Family

ID=26490671

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17571598A Pending JPH1170474A (en) 1997-06-23 1998-06-23 Rotating grinding wheel

Country Status (1)

Country Link
JP (1) JPH1170474A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009172750A (en) * 2008-01-25 2009-08-06 Suntek Industries Ltd Porous polishing disk and method for producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009172750A (en) * 2008-01-25 2009-08-06 Suntek Industries Ltd Porous polishing disk and method for producing the same

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