JPH0624860U

JPH0624860U - Electroplated whetstone

Info

Publication number: JPH0624860U
Application number: JP3015492U
Authority: JP
Inventors: 健二福島; 秀男大下
Original assignee: 大阪ダイヤモンド工業株式会社
Priority date: 1992-05-08
Filing date: 1992-05-08
Publication date: 1994-04-05
Anticipated expiration: 2005-04-12
Also published as: JPH0715725Y2

Abstract

(57)【要約】【目的】砥面の全体にわたって切粉の排出性が良く、
高い精度で加工が行える電着砥石を提供する。【構成】砥石台金の砥面２に、互いに交叉する多数の
傾斜溝３、４を設けてその間に４角錐状突起５を形成
し、その突起５と傾斜溝３、４により連続した凹凸パタ
ーンを形成する。各傾斜溝３、４の角度α、βを異なら
せて各突起５の頂点位置を回転方向に対してずらし、各
突起５の表面に、突起より小さい超砥粒を電着する。 (57) [Summary] [Purpose] Good chip discharge over the entire grinding surface,
Provide an electrodeposition grindstone that can be processed with high accuracy. [Structure] A large number of inclined grooves 3 and 4 intersecting each other are provided on a grinding surface 2 of a whetstone base, and a quadrangular pyramid-shaped protrusion 5 is formed between them, and a concavo-convex pattern formed by the protrusions 5 and the inclined grooves 3 and 4. To form. The angles α and β of the inclined grooves 3 and 4 are different from each other to shift the apex position of each protrusion 5 with respect to the rotation direction, and superabrasive grains smaller than the protrusion are electrodeposited on the surface of each protrusion 5.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

この考案は、ダイヤモンド又は立方晶窒化ホウ素などの超砥粒を、砥石の台金表面に電気化学方法によって固着させた電着砥石の改良に関するものである。 The present invention relates to an improvement of an electrodeposition grindstone in which superabrasive grains such as diamond or cubic boron nitride are fixed to the surface of a base metal of the grindstone by an electrochemical method.

【０００２】[0002]

【従来の技術及びその課題】[Prior art and its problems]

この種の電着砥石は、レジンボンドやメタルボンド、或いはビトリファイドボンドを用いた砥石に比べて、砥面における砥粒の集中度が高く、加工に作用する砥粒数が極めて多い。このために、ガラス材やセラミック材などを加工した場合、砥粒の摩耗の進行と共に切粉の排出が著しく悪くなり、目詰まりや溶着を起こしやすい問題がある。 This type of electrodeposited grindstone has a higher concentration of abrasive grains on the grinding surface and an extremely large number of abrasive grains that affect machining, as compared with a grindstone using a resin bond, a metal bond, or a vitrified bond. For this reason, when a glass material or a ceramic material is processed, there is a problem that clogging and welding are likely to occur because the discharge of chips becomes significantly worse as the abrasion of the abrasive grains progresses.

【０００３】このような問題に対して、従来、図６に示すように台金２１の砥面２２に所定の間隔でスリット２３を形成し、そのスリット２３により切粉の排出を行うようにした電着砥石が提案されている。To address such a problem, conventionally, as shown in FIG. 6, slits 23 are formed at a predetermined interval on a polishing surface 22 of a base metal 21, and the slits 23 are used to discharge chips. Electroplated whetstones have been proposed.

【０００４】しかし、上記提案の砥石では、砥石全体でみれば確かに砥面２２にスリット２３による凹凸が混在し、切粉の排出性が若干改善されるが、砥面２２の高い部分では、以前と同様に砥粒の集中度が高く、従来通り目詰まりや溶着を起こしやすい欠点がある。However, in the above-mentioned proposed grindstone, when seen from the whole grindstone, the unevenness due to the slits 23 is surely mixed in the grind surface 22 and the discharge property of the chips is slightly improved, but in the high part of the grind surface 22 As before, the concentration of abrasive grains is high, and there is a drawback that clogging and welding easily occur as before.

【０００５】また、従来の電着砥石においては、切込み深さを大きくできると共に、高い加工精度が確保でき、高い研削能率が得られる砥石の開発が求められている。Further, in the conventional electrodeposition grindstone, there is a demand for development of a grindstone capable of increasing the cutting depth, ensuring high machining accuracy, and obtaining high grinding efficiency.

【０００６】そこで、この考案は、上記の課題を解決し、砥面の全体にわたって切粉の排出を良好に行うことができ、しかも高い研削精度で加工を行うことができる電着砥石を提供することを目的としている。Therefore, the present invention solves the above-mentioned problems and provides an electrodeposition grindstone capable of satisfactorily discharging chips over the entire grinding surface and capable of processing with high grinding accuracy. The purpose is to do.

【０００７】[0007]

【課題を解決するための手段】[Means for Solving the Problems]

上記の課題を解決するため、この考案は、砥石台金の砥面に、その砥面の両側から一定のピッチで傾斜する多数の傾斜溝をそれぞれ互いに交叉するように設け、その各傾斜溝の間に砥面に、一様に分布する４角錘状突起を形成し、この４角錐状突起の表面に、その突起より小さな粒径の超砥粒を電着作用によって固定した構成としたものである。 In order to solve the above problems, the present invention provides a plurality of inclined grooves, which are inclined at a constant pitch from both sides of the grinding surface of a grinding wheel base metal, so as to intersect each other, and In the structure, four pyramidal protrusions that are uniformly distributed are formed on the grinding surface, and superabrasive grains with a smaller particle size than the protrusions are fixed to the surface of the four-sided pyramidal protrusions by electrodeposition. It was done.

【０００８】また、この考案は第２の手段として、上記各傾斜溝の傾斜角度を互いに異ならせた構造を採用したのである。Further, the present invention employs, as a second means, a structure in which the inclination angles of the respective inclined grooves are different from each other.

【０００９】[0009]

【作用】[Action]

上記の構造においては、各傾斜溝と４角錐状突起により連続した凹凸パターンが形成され、砥面に多数のチップポケットとなる隙間が形成される。また、各４角錐状突起の頂点付近の砥粒だけが加工に関与するため、切粉の目詰まりや溶着が防止される。 In the above structure, a concavo-convex pattern is formed by the inclined grooves and the four-sided pyramidal protrusions, and a large number of chip pockets are formed in the polishing surface. Further, since only the abrasive grains near the apexes of the four-sided pyramidal protrusions are involved in the processing, clogging of chips and welding are prevented.

【００１０】また、第２の手段では、各傾斜溝の傾斜角度を互いに異ならせると、その間で形成される４角錐の頂点の位置がずれるため、その砥石で加工を行った場合、各々の４角錐突起がそれぞれ細かいピッチで加工面に喰い込むことになり、精度のよい加工面をえることができる。Further, in the second means, when the inclination angles of the inclined grooves are made different from each other, the positions of the vertices of the quadrangular pyramids formed between them are displaced, and therefore, when the grindstone is used for machining, the respective points are different. The quadrangular pyramid protrusions bite into the machined surface at a fine pitch, respectively, and a machined surface with high accuracy can be obtained.

【００１１】[0011]

【実施例】【Example】

図１乃至図４は実施例の電着砥石を示している。図において、１は円板状に形成した台金であり、その台金１の外周の砥面２に、その両側面からそれぞれ一定のピッチで円周方向に傾斜する多数の傾斜溝３、４が設けられ、その交叉する各傾斜溝３、４の間に、砥面２に一様に分布する４角錐状突起５が形成されている。 1 to 4 show an electrodeposition grindstone of the embodiment. In the figure, reference numeral 1 denotes a disc-shaped base metal, and a large number of inclined grooves 3 and 4 inclined in the circumferential direction from both side surfaces of the base metal 1 on the outer peripheral polishing surface 2 at a constant pitch. Are provided, and the four-sided pyramidal protrusions 5 uniformly distributed on the grinding surface 2 are formed between the intersecting inclined grooves 3 and 4.

【００１２】上記傾斜溝３、４は、砥面２の全体にわたって均一に形成され、その各傾斜溝３、４と４角錐状突起５により砥面２に連続した凹凸パターンが形成されている。また、図２に示すように、各傾斜溝３、４の回転方向に対する傾斜角度α、β は、４５°を中心に前後１０°の角度範囲で互いに異なるように（α≠β）設定されており、これにより各傾斜溝３、４の間で形成される各４角錐状突起５の頂点の位置は、砥石の円周方向（すなわち砥石の回転方向）に対してそれぞれわずかな量ずれて配列されている。The inclined grooves 3 and 4 are formed uniformly over the entire polishing surface 2, and the inclined grooves 3 and 4 and the four-sided pyramidal protrusion 5 form a concavo-convex pattern continuous to the polishing surface 2. Further, as shown in FIG. 2, the inclination angles α and β of the respective inclined grooves 3 and 4 with respect to the rotation direction are set so as to be different (α ≠ β) within an angular range of 10 ° in front and back around 45 °. As a result, the positions of the apexes of the four-sided pyramidal protrusions 5 formed between the inclined grooves 3 and 4 are slightly displaced with respect to the circumferential direction of the grindstone (that is, the rotating direction of the grindstone). Are arranged.

【００１３】また、上記各４角錐状突起５の表面には、図４に示すように、ダイヤモンドまたは立方晶窒化ホウ素等の多数の超砥粒６がニッケル電着によって固着されている。この超砥粒６は、４角錐状突起５よりも小さな粒径のもので形成されており、砥面２全体に単層で一様に分布して研削作業面を形成している。Further, as shown in FIG. 4, a large number of superabrasive grains 6 such as diamond or cubic boron nitride are fixed to the surface of each of the four-sided pyramidal protrusions 5 by nickel electrodeposition. The superabrasive grains 6 are formed with a grain size smaller than that of the quadrangular pyramidal protrusions 5, and are uniformly distributed in a single layer over the entire polishing surface 2 to form a grinding work surface.

【００１４】上記のような構造で成る実施例の電着砥石においては、図４に示すように、各傾斜溝３、４と４角錐状突起５によって、砥面２全体に一様にチップポケットとなる多数の間隙７が形成されるため、その間隙７を通って切粉が排出され、目詰まりが防止される。In the electrodeposition grindstone of the embodiment having the above-mentioned structure, as shown in FIG. 4, the inclined grooves 3, 4 and the quadrangular pyramid-shaped projections 5 make the chip pocket uniformly over the entire grinding surface 2. Since a large number of gaps 7 are formed, the chips are discharged through the gaps 7 and clogging is prevented.

【００１５】また、各４角錐状突起５の頂点部分の砥粒６だけが加工に関与するために、砥面２に対する切粉の目詰まりや溶着が生じにくい。Further, since only the abrasive grains 6 at the apex of each four-sided pyramidal protrusion 5 are involved in the processing, clogging and welding of cutting chips to the polishing surface 2 are less likely to occur.

【００１６】さらに、砥石の回転方向に対して各４角錐状突起５の頂点位置がわずかずつずれ、各４角錐状突起５の回転軌跡がそれぞれ異なるため、加工面は細かいピッチの突起５表面で研削されることになり、凹凸が少なく精度の高い仕上面を得ることができる。これに対して、各４角錐状突起５が全て同一の回転軌跡上にあると、各突起５によって加工面が何回もえぐられるため、深い筋がつき、仕上面精度が悪くなる不具合がある。Furthermore, since the vertex positions of the four-sided pyramidal protrusions 5 are slightly shifted with respect to the rotation direction of the grindstone, and the rotation trajectories of the respective four-sided pyramidal protrusions 5 are different from each other, the processing surface is the surface of the protrusions 5 with a fine pitch. Therefore, it is possible to obtain a highly accurate finished surface with less unevenness. On the other hand, if all the four-sided pyramidal protrusions 5 are on the same rotation locus, the machining surface is scooped by the protrusions 5 many times, resulting in deep streaks and poor finishing surface accuracy. .

【００１７】また、互いに交叉する傾斜溝３、４により４角錐状突起５を形成する構造では、各傾斜溝３、４の傾斜角度α、βやピッチを変化させることによって、加工に作用する砥粒数を自由に変化させることができる。このため、加工する被削材料の性質に応じて、切粉排出が最適となる作用砥粒数を設定することが可能となり、高い能率で安定した加工を行うことができる。Further, in the structure in which the quadrangular pyramidal protrusions 5 are formed by the inclined grooves 3 and 4 intersecting with each other, the abrasive angles which act on the machining are changed by changing the inclination angles α and β and the pitch of the inclined grooves 3 and 4. The number of grains can be changed freely. For this reason, it is possible to set the number of working abrasive grains that optimizes the discharge of chips according to the property of the work material to be processed, and it is possible to perform stable processing with high efficiency.

【００１８】なお、上記の例では、砥面２をストレートな円筒形状としたが、砥面を半径方向に凸形又は凹形の円弧状とした異形の砥石や、台金を棒状に形成した砥石に対しても、この考案を同様に適用することができる。In the above example, the grinding surface 2 has a straight cylindrical shape, but the grinding surface is formed in the shape of a bar with a deformed grindstone in which the grinding surface has a convex or concave arc shape in the radial direction. The present invention can be similarly applied to a grindstone.

【００１９】[0019]

【実施例】【Example】

円板状の台金１（外径１５０mmΦ、幅１０mm、材質Ｓ２５Ｃ）の外周面に、その両側からピッチ２mmで円周方向に傾斜する傾斜溝３、４を形成し、その各傾斜溝３、４の間に、底辺が０．８mmの４角錐状突起５を形成した。また、各傾斜溝３、４の傾斜角度α、βは、それぞれα＝４１°、β＝４９°に設定した。 On the outer peripheral surface of a disk-shaped base metal 1 (outer diameter 150 mmΦ, width 10 mm, material S25C), inclined grooves 3 and 4 inclined in the circumferential direction with a pitch of 2 mm from both sides are formed, and each inclined groove 3 4, the pyramidal protrusions 5 having a base of 0.8 mm were formed. The inclination angles α and β of the inclined grooves 3 and 4 were set to α = 41 ° and β = 49 °, respectively.

【００２０】上記のように形成した台金１を、めっき前処理として電解脱脂及び塩酸処理を行った後、図５に示すようなダイヤモンド砥粒６’を含んだ電解ニッケルメッキ槽１０に入れ、ニッケル電着を行った。この電着作業は、台金１を回転させながらポンプ１１によりダイヤモンド砥粒６’を撹拌し、台金１に砥粒を沈降させながら、台金１の外周面に砥粒を固着させた。この場合、ダイヤモンド砥粒６’はメッシュ１２０の粒径のものを使用し、めっき厚みは砥粒径の６０％前後に設定した。なお、図５において１２はニッケル板、１３はヒータである。The base metal 1 formed as described above is subjected to electrolytic degreasing and hydrochloric acid treatment as a pretreatment for plating, and then placed in an electrolytic nickel plating tank 10 containing diamond abrasive grains 6 ′ as shown in FIG. Nickel electrodeposition was performed. In this electrodeposition work, while the base metal 1 is rotated, the diamond abrasive grains 6 ′ are stirred by the pump 11 and the abrasive grains are allowed to settle on the base metal 1, while the abrasive grains are fixed on the outer peripheral surface of the base metal 1. Let In this case, diamond abrasive grains 6'having a grain size of mesh 120 were used, and the plating thickness was set to about 60% of the abrasive grain size. In FIG. 5, 12 is a nickel plate and 13 is a heater.

【００２１】この様に得られた電着砥石と、砥面を均一な円筒面とした従来の砥石とを用いて超硬合金を平面研削により、砥石周速１６００ｍ／min 、工作物速度１５ｍ／ min 、切り込み量０．０２mm／pass、研削液ＪＩＳＷ２種２％の条件で工作物を４０００mm³／mm研削した結果、従来の砥石では、法線方向の研削抵抗が６２Ｎ／mm、接線方向の研削抵抗が２２Ｎ／mmであり、また砥面に目詰まりを生じたのに対して、上記の電着砥石では法線方向の研削抵抗が４３Ｎ／mm、接線方向の研削抵抗が１６Ｎ／mmと従来の電着砥石にくらべて低くまた砥面に目詰まりが見られなかった。Using the electrodeposition grindstone thus obtained and a conventional grindstone having a uniform cylindrical surface as a grinding surface, a cemented carbide was surface-ground to obtain a grinding wheel peripheral speed of 1600 m / min and a work speed of 15 m / min. min, depth of cut 0.02 mm / pass, grinding fluid JIS W2 class 2%, the workpiece was ground at 4000 mm ³ / mm. As a result, the conventional grinding wheel had a grinding resistance of 62 N / mm in the normal direction and tangential direction. Grinding resistance was 22 N / mm, and the grinding surface was clogged. On the other hand, with the above electrodeposition grindstone, the grinding resistance in the normal direction was 43 N / mm and the grinding resistance in the tangential direction was 16 N / mm. As compared with the conventional electroplated whetstone, it was lower and there was no clogging on the grinding surface.

【００２２】また、従来砥石では溶着によってほとんど加工出来なかった合成樹脂材を、上記の電着砥石を用いて研削加工を行った場合、砥面に溶着が少なく、加工継続が可能であった。Further, when a synthetic resin material, which could hardly be processed by welding with a conventional grindstone, was ground by using the above-mentioned electrodeposition grindstone, there was little welding on the grinding surface and it was possible to continue processing. .

【００２３】[0023]

【考案の効果】[Effect of device]

以上のように、この考案においては、砥面に多数の傾斜溝と４角錐状突起によって連続した凹凸パターンを形成し、その４角錐状突起の表面に小さい超砥粒を電着させたので、砥面全体に切粉が排出する多数の間隙が形成されると共に、４角錐状突起の頂点部分の砥粒のみが加工に関与することになり、切粉の目詰まりや溶着を確実に防止できる効果がある。 As described above, in the present invention, a continuous uneven pattern is formed on the polishing surface by a large number of inclined grooves and quadrangular pyramid protrusions, and small superabrasive grains are electrodeposited on the surface of the quadrangular pyramid protrusions. As a result, a large number of gaps from which chips are discharged are formed on the entire grinding surface, and only the abrasive grains at the apex of the four-sided pyramidal protrusions are involved in the processing, which ensures clogging and welding of chips. There is an effect that can be prevented.

【００２４】また、交叉する傾斜溝によって４角錐状突起を形成する構造では、傾斜溝の角度やピッチを変えることにより加工に作用する砥粒数を変化させることができるため、被加工材料に応じた最適な砥面を形成することができ、高精度で高能率な研削加工を行うことができる。Further, in the structure in which the quadrangular pyramid-shaped protrusions are formed by the intersecting inclined grooves, the number of abrasive grains acting on the processing can be changed by changing the angle or pitch of the inclined grooves. The optimum grinding surface can be formed according to the conditions, and highly accurate and efficient grinding can be performed.

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

【図１】樹脂の電着砥石を示す斜視図FIG. 1 is a perspective view showing a resin electrodeposition grindstone.

【図２】同上の砥面を拡大して示す正面図FIG. 2 is a front view showing an enlarged grinding surface of the same.

【図３】砥面の斜視図FIG. 3 is a perspective view of a polishing surface

【図４】砥面の断面図FIG. 4 is a sectional view of a grinding surface

【図５】電解ニッケルめっき槽を示す模式図FIG. 5 is a schematic diagram showing an electrolytic nickel plating tank.

【図６】実施例を示す斜視図FIG. 6 is a perspective view showing an embodiment.

【符号の説明】[Explanation of symbols]

１台金３、４傾斜溝５４角錐状突起６超砥粒 1 base metal 3, 4 inclined groove 5 4 pyramidal protrusion 6 super abrasive grain

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

【請求項１】砥石台金の砥面に、その砥面の両側から
一定のピッチで傾斜する多数の傾斜溝をそれぞれ互いに
交叉するように設け、その各傾斜溝の間に、砥面に一様
に分布する４角錘状突起を形成し、この４角錐状突起の
表面に、その突起より小さな粒径の超砥粒を電着作用に
よって固定した電着砥石。1. A grinding surface of a whetstone base is provided with a large number of inclined grooves that are inclined at a constant pitch from both sides of the grinding surface so as to intersect with each other. An electrodeposition grindstone in which four-sided pyramidal protrusions having a uniform distribution are formed, and superabrasive grains having a smaller particle size than the protrusions are fixed to the surface of the four-sided pyramidal protrusions by an electrodeposition action.

【請求項２】上記各傾斜溝の傾斜角度を互いに異なら
せた請求項１に記載の電着砥石。2. The electrodeposition grindstone according to claim 1, wherein the inclination angles of the inclined grooves are different from each other.