JP2023007788A - Grinding wheel - Google Patents

Grinding wheel Download PDF

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JP2023007788A
JP2023007788A JP2021110858A JP2021110858A JP2023007788A JP 2023007788 A JP2023007788 A JP 2023007788A JP 2021110858 A JP2021110858 A JP 2021110858A JP 2021110858 A JP2021110858 A JP 2021110858A JP 2023007788 A JP2023007788 A JP 2023007788A
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grindstone
abrasive grains
processing
rotation
axis
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英司 坂下
Eiji Sakashita
政浩 小岩
Masahiro Koiwa
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NC DIAMOND CO Ltd
Mitsubishi Heavy Industries Ltd
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NC DIAMOND CO Ltd
Mitsubishi Heavy Industries Ltd
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Abstract

To improve processing efficiency.SOLUTION: In a grinding wheel 1 in which a machining section 4 to which abrasive grains 3 are fixed is arranged along a circumferential direction of a rotation, the machining section 4 forms a plurality of divisions 4a to 4h along the circumferential direction, and the plurality of divisions 4a to 4h differ in size and a pattern of the abrasive grains 3.SELECTED DRAWING: Figure 2

Description

本開示は、砥石に関する。 The present disclosure relates to grinding wheels.

従来、例えば、特許文献1に、ビビリ発生を抑えて高い加工精度を得ることを目的とした研磨砥石について開示されている。この研磨砥石は、砥粒層を有する多数のセグメントチップを有している。多数のセグメントチップは、一円周上における周方向の寸法が異なる複数種類が用いられ、周方向に隙間無く配置される。 Conventionally, for example, Patent Literature 1 discloses a polishing grindstone for the purpose of suppressing chattering and obtaining high processing accuracy. This polishing wheel has a large number of segmented tips with abrasive grain layers. A plurality of types of segment chips having different circumferential dimensions on one circumference are used, and are arranged without gaps in the circumferential direction.

特開2002-254321号公報JP-A-2002-254321

砥石は、加工に伴って砥粒の摩耗が進行すると加工効率が低下し、やがて交換が必要になる。しかし、砥石を交換することが難しい環境下では、砥石の加工効率を向上することが望まれる。 As the abrasive grains of the grindstone become worn during processing, the processing efficiency of the grindstone decreases, and eventually it becomes necessary to replace the grindstone. However, in an environment where it is difficult to replace the grindstone, it is desirable to improve the processing efficiency of the grindstone.

本開示は上述した課題を解決するものであり、加工効率を向上することのできる砥石を提供することを目的とする。 An object of the present disclosure is to solve the above-described problems, and to provide a grindstone capable of improving processing efficiency.

上述の目的を達成するために、本開示の一態様に係る砥石は、砥粒が固定される加工部が回転の周方向に沿って配置される砥石であって、前記加工部は、周方向に沿って複数の区分を構成し、複数の前記区分は、前記砥粒の大きさやパターンが異なる。 In order to achieve the above object, a grindstone according to one aspect of the present disclosure is a grindstone in which a processing portion to which abrasive grains are fixed is arranged along the circumferential direction of rotation, and the processing portion is arranged in the circumferential direction A plurality of sections are formed along the line, and the plurality of sections differ in the size and pattern of the abrasive grains.

上述の目的を達成するために、本開示の一態様に係る砥石は、砥粒が固定される加工部が回転の周方向に沿って配置される砥石であって、前記加工部は、凸部および凹部を有する。 In order to achieve the above object, a grindstone according to an aspect of the present disclosure is a grindstone in which a processing portion to which abrasive grains are fixed is arranged along the circumferential direction of rotation, and the processing portion is a convex portion and recesses.

本開示は、加工効率を向上できる。 The present disclosure can improve processing efficiency.

図1は、実施形態に係る砥石の概略図である。FIG. 1 is a schematic diagram of a whetstone according to an embodiment. 図2は、実施形態に係る砥石の周端面の展開図である。FIG. 2 is a developed view of the peripheral end surface of the grindstone according to the embodiment. 図3は、実施形態に係る砥石の側面図である。FIG. 3 is a side view of the whetstone according to the embodiment. 図4は、実施形態に係る砥石の周端面を視た平面図である。FIG. 4 is a plan view of the peripheral end surface of the grindstone according to the embodiment. 図5は、実施形態に係る砥石の側面図である。FIG. 5 is a side view of the grindstone according to the embodiment. 図6は、実施形態に係る砥石の側面図である。FIG. 6 is a side view of the grindstone according to the embodiment.

以下に、本開示に係る実施形態を図面に基づいて詳細に説明する。なお、この実施形態によりこの発明が限定されるものではない。また、下記実施形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものが含まれる。 Hereinafter, embodiments according to the present disclosure will be described in detail based on the drawings. In addition, this invention is not limited by this embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same.

図1は、実施形態に係る砥石の概略図である。 FIG. 1 is a schematic diagram of a whetstone according to an embodiment.

実施形態の砥石1は、加工装置100に用いられる。加工装置100は、適宜移動させた砥石1によって加工対象Gを研削加工する。加工装置100は、本体101に設けられた回転軸101Aに砥石1が取り付けられる。加工装置100は、回転軸101Aを正逆回転することで矢印Aにて示すように軸心Sの廻りに砥石1を回転移動させる。加工装置100は、回転軸101Aの回転数を変更可能であり、砥石1を回転移動の速度を適宜変えられる。加工装置100は、回転軸101A(軸心S)の延在方向に沿って本体101を移動することで矢印Bにて示すように砥石1をスライド移動させる。加工装置100は、回転軸101A(軸心S)に直交する軸101Bを中心にして傾けるように本体101を傾斜させることで矢印Cにて示すように砥石1を加工対象Gに対して傾斜移動させる。砥石1は、回転軸101A(軸心S)を中心とする円盤形状に形成された台金1Aにより構成されている。砥石1は、加工装置100によって回転移動され、台金1Aにおいて回転軸101A(軸心S)を中心とした周端面1Aaが加工対象Gに接触することで加工対象Gを研削する。砥石1は、台金1Aが回転軸101A(軸心S)の延在方向に所定の厚さを有しており、当該厚さの範囲で周端面1Aaが加工対象Gに接触することができる。また、砥石1は、加工装置100によって回転移動されつつスライド移動され、周端面1Aaおよび周端面1Aaに連続する台金1Aの側面1Abが加工対象Gに接触することで加工対象Gを研削する。また、砥石1は、加工装置100によって回転移動されつつ傾斜移動(およびスライド移動)され、周端面1Aaおよび側面1Abが加工対象Gに接触することで加工対象Gを研削する。 The grindstone 1 of the embodiment is used in the processing apparatus 100. FIG. The processing apparatus 100 grinds the processing object G by the grindstone 1 which is moved as appropriate. The processing apparatus 100 has a grindstone 1 attached to a rotating shaft 101A provided in a main body 101 . The processing apparatus 100 rotates the grindstone 1 around the axis S as indicated by the arrow A by rotating the rotary shaft 101A forward and backward. The processing apparatus 100 can change the number of rotations of the rotating shaft 101A, and can appropriately change the speed of rotational movement of the grindstone 1 . The processing apparatus 100 slides the grindstone 1 as indicated by an arrow B by moving the main body 101 along the extending direction of the rotating shaft 101A (axis S). The processing apparatus 100 tilts the grindstone 1 with respect to the workpiece G as indicated by an arrow C by tilting the main body 101 about an axis 101B perpendicular to the rotation axis 101A (axis S). Let The grindstone 1 is composed of a disk-shaped base metal 1A centered on a rotating shaft 101A (axis S). The grindstone 1 is rotationally moved by the processing apparatus 100, and grinds the processing object G by contacting the processing object G with the peripheral end face 1Aa centered on the rotating shaft 101A (axial center S) of the base metal 1A. In the grindstone 1, the base metal 1A has a predetermined thickness in the extending direction of the rotating shaft 101A (axis S), and the peripheral end surface 1Aa can contact the workpiece G within the thickness range. . Further, the grindstone 1 is rotated and slid by the processing apparatus 100, and the peripheral end surface 1Aa and the side surface 1Ab of the base metal 1A that is continuous with the peripheral end surface 1Aa come into contact with the object G to grind the object G. Further, the grindstone 1 is rotated and tilted (and slid) by the processing apparatus 100, and grinds the workpiece G by contacting the workpiece G with the peripheral end surface 1Aa and the side surface 1Ab.

図2は、実施形態に係る砥石の周端面の展開図である。 FIG. 2 is a developed view of the peripheral end surface of the grindstone according to the embodiment.

砥石1は、図2に示すように、台金1Aの周端面1Aaに加工部4が配置される。加工部4は、周端面1Aaに砥粒3が固定されて設けられる。砥粒3は、例えば、ダイヤモンドが用いられ、周端面1Aaに溶着により固定される。加工部4は、周方向に沿って複数(実施形態では8個)の区分4A~4Hが構成される。区分4A~4Hは、セグメントとも言い、砥粒3の大きさやパターンが異なる。砥粒3の大きさとは、砥粒3の粒子の大きさをあらわす粒度や、平均粒径を含む。また、パターンとは、砥粒3の間隔T(粗密:密度)や、砥粒3の配置や、砥粒3の有無や、砥粒3の混在や、周方向長さLを示す。例えば、区分4Aと区分4Bとは、砥粒3の間隔Tや配置であるパターンが同じであるが、砥粒3の大きさ(粒度や平均粒径)が異なる。区分4Aと区分4Cとは、砥粒3の大きさが同じであるが、パターンのうちの間隔Tが異なる。区分4Aと区分4Dとは、砥粒3の大きさおよび間隔Tが同じであるが、パターンのうちの配置が異なる。区分4Aと区分4Eとは、砥粒3の間隔Tが同じであるが、区分4Eはパターンのうちの大きさの異なる砥粒3が混在している。大きさの異なる砥粒3が混在している場合は、大きさの異なる砥粒3がランダムに混在していること、および大きさの異なる砥粒3が整列して混在していることを含む。区分4Aと区分4Fとは、パターンのうちの砥粒3の有無で異なる。区分4A~4Hの少なくとも2つの関係は、パターンのうちの周方向長さLが異なっていてもよい。区分4Gと区分4Hのように、砥粒3の大きさやパターンが同じものが存在してもよく、周方向で隣接していてもよい。各区分4A~4Hの境目は、砥粒3の大きさやパターンの異なりにより生じるものであってもよく、溝が形成されていてもよい。各区分4A~4Hの周方向の順番は特に限定されるものではない。 As shown in FIG. 2, the grindstone 1 has a processed portion 4 arranged on a peripheral end surface 1Aa of a base metal 1A. The processing portion 4 is provided with abrasive grains 3 fixed to the peripheral end face 1Aa. The abrasive grains 3 are, for example, diamond, and are fixed to the peripheral end face 1Aa by welding. The processing portion 4 has a plurality (eight in the embodiment) of sections 4A to 4H along the circumferential direction. The segments 4A to 4H are also called segments, and the sizes and patterns of the abrasive grains 3 are different. The size of the abrasive grains 3 includes the grain size representing the grain size of the abrasive grains 3 and the average grain size. The pattern indicates the interval T (roughness: density) of the abrasive grains 3, the arrangement of the abrasive grains 3, the presence or absence of the abrasive grains 3, the mixture of the abrasive grains 3, and the length L in the circumferential direction. For example, the section 4A and the section 4B have the same pattern, which is the interval T and arrangement of the abrasive grains 3, but differ in the size of the abrasive grains 3 (grain size and average grain size). The sizes of the abrasive grains 3 are the same in the sections 4A and 4C, but the intervals T in the pattern are different. The division 4A and the division 4D have the same size of the abrasive grains 3 and the interval T, but differ in the arrangement of the patterns. The interval T between the abrasive grains 3 is the same between the section 4A and the section 4E, but the abrasive grains 3 of different sizes in the pattern are mixed in the section 4E. When abrasive grains 3 with different sizes are mixed, it includes randomly mixing abrasive grains 3 with different sizes and aligning and mixing abrasive grains 3 with different sizes. . Section 4A and section 4F differ in the presence or absence of abrasive grains 3 in the pattern. At least two relationships of sections 4A-4H may differ in circumferential length L of the pattern. As in the section 4G and the section 4H, the same size and pattern of the abrasive grains 3 may exist, or they may be adjacent in the circumferential direction. The boundaries between the sections 4A to 4H may be caused by differences in the size or pattern of the abrasive grains 3, or grooves may be formed. The order of the sections 4A to 4H in the circumferential direction is not particularly limited.

このように、実施形態の砥石1は、砥粒3が固定される加工部4が回転の周方向に沿って配置される砥石1であって、加工部4は、周方向に沿って複数の区分4A~4Hを構成し、複数の区分4A~4Hは、砥粒3の大きさやパターンが異なる。 Thus, the grindstone 1 of the embodiment is a grindstone 1 in which the processing portion 4 to which the abrasive grains 3 are fixed is arranged along the circumferential direction of rotation, and the processing portion 4 includes a plurality of Sections 4A to 4H are configured, and the plurality of sections 4A to 4H differ in size and pattern of the abrasive grains 3 .

ここで、例えば、一般の砥石は、2種類のふるい目を使って砥粒のサイズを選別し、台金の周方向に沿って砥粒を溶着したものがある。そのため、一般の砥石は、砥粒サイズが一定の寸法範囲のなかで大小サイズがランダムに分布する。この一般の砥石は、研削の初期は大きなサイズの砥粒の刃により効率良く加工できるが、時間経過とともに砥粒の摩耗が進行して加工効率が低下する。一般の砥石は、理想的には、摩耗した大きな砥粒が台金に溶着された溶金との境界で破断または脱落し、これにより表れた小さなサイズの砥粒の刃先により加工効率が向上する砥粒循環によって、全ての砥粒を有効利用して寿命に至ることを期待している。しかし、一般の砥石は、装置側の砥石への押付力の制限などにより摩耗した大きな砥粒が残存し砥粒循環が効果的に行われないおそれがある。 Here, for example, there is a general whetstone in which two types of sieve meshes are used to select the size of abrasive grains and the abrasive grains are welded along the circumferential direction of a base metal. Therefore, in a general whetstone, large and small sizes of abrasive grains are randomly distributed within a certain size range. In the initial stage of grinding, this general whetstone can be efficiently processed by means of blades with large-sized abrasive grains, but as time elapses, the wear of the abrasive grains progresses and the processing efficiency decreases. In general whetstones, ideally, the worn large abrasive grains break or fall off at the boundary with the molten metal welded to the base metal. It is expected that all the abrasive grains will be effectively used and the life will be extended by the abrasive grain circulation. However, in general whetstones, there is a risk that large abrasive grains that have been worn remain due to the limitation of the pressing force on the whetstone on the device side, and the abrasive grains are not effectively circulated.

この一般の砥石に対し、実施形態の砥石1によれば、加工部4の複数の区分4A~4Hが砥粒3の大きさやパターンが異なるため、疑似的な砥粒循環を生じさせることができ、加工効率を向上できる。例えば、放射能環境下のような加工環境において、研削加工を行う場合、頻繁に砥石1を交換することが難しいため、1つの砥石1で加工量をできるだけ確保する必要がある。実施形態の砥石1によれば、加工効率の向上によって、1つの砥石1で加工量をきるだけ確保できる。さらに、実施形態の砥石1によれば、加工部4の複数の区分4A~4Hが砥粒3の大きさやパターンが異なるため、加工時に振動が発生することで、例えば、燃料デブリのような硬度が一定でない加工対象Gの場合に振動によって加工効率を向上できる。例えば、砥石1の固有振動数と等しい振動を与えるように共振に近い回転数とすることで、加工効率を向上できる。また、実施形態の砥石1によれば、回転を正逆反転させることによって、砥粒を有効利用することができ、1つの砥石1で加工量をきるだけ確保できる。 In contrast to this general grindstone, according to the grindstone 1 of the embodiment, since the plurality of sections 4A to 4H of the processing portion 4 have different sizes and patterns of the abrasive grains 3, pseudo circulation of abrasive grains can be generated. , can improve the processing efficiency. For example, when grinding in a processing environment such as a radioactive environment, it is difficult to replace the grindstone 1 frequently, so it is necessary to secure as much processing amount as possible with one grindstone 1 . According to the grindstone 1 of the embodiment, it is possible to ensure the amount of machining with one grindstone 1 as much as possible by improving the machining efficiency. Furthermore, according to the grindstone 1 of the embodiment, since the plurality of sections 4A to 4H of the processing portion 4 have different sizes and patterns of the abrasive grains 3, vibration occurs during processing, resulting in hardness such as fuel debris. Vibration can improve the machining efficiency in the case of a machining target G in which is not constant. For example, the processing efficiency can be improved by setting the rotational speed close to resonance so as to give vibration equal to the natural frequency of the grindstone 1 . Further, according to the grindstone 1 of the embodiment, by reversing the rotation direction, the abrasive grains can be effectively used, and the amount of processing can be ensured with one grindstone 1 as much as possible.

また、実施形態の砥石1では、加工部4は、回転の軸(軸心S)を中心とした周端面1Aaに形成される。 Further, in the grindstone 1 of the embodiment, the processed portion 4 is formed on the peripheral end surface 1Aa around the rotation axis (axis S).

この実施形態の砥石1によれば、周端面1Aaは、加工対象Gに回転移動しながら接触する部分であり、当該周端面1Aaに加工部4を形成することで、加工効率の向上に寄与できる。 According to the grindstone 1 of this embodiment, the peripheral end surface 1Aa is a portion that comes into contact with the workpiece G while rotating, and forming the processing portion 4 on the peripheral end surface 1Aa can contribute to improving the processing efficiency. .

図3は、実施形態に係る砥石の側面図である。 FIG. 3 is a side view of the whetstone according to the embodiment.

実施形態の砥石1では、図3に示すように、台金1Aにおいて周端面1Aaに連続して回転の軸(軸心S)の延在方向に向く側面1Abにも加工部5が設けられている。加工部5は、周端面1Aaの加工部4と同様に、周方向に沿って複数(実施形態では8個)の区分5A~5Hを構成し、複数の区分5A~5Hは、砥粒3の大きさやパターンが異なる。各区分5A~5Hの境目は、砥粒3の大きさやパターンの異なりにより生じるものであってもよく、溝が形成されていてもよい。 In the grindstone 1 of the embodiment, as shown in FIG. 3, a processed portion 5 is also provided on a side surface 1Ab of the base metal 1A that is continuous with the peripheral end surface 1Aa and faces in the extending direction of the axis of rotation (axis S). there is Like the processed portion 4 of the peripheral end surface 1Aa, the processed portion 5 comprises a plurality (eight in the embodiment) of sections 5A to 5H along the circumferential direction. Different sizes and patterns. The boundaries between the sections 5A to 5H may be caused by differences in the size or pattern of the abrasive grains 3, or grooves may be formed.

この実施形態の砥石1によれば、周端面1Aaの加工部4によって加工が進むと、加工により形成された加工対象Gの凹部の側壁に側面1Abが接触する。従って、実施形態の砥石1によれば、この側面1Abに加工部5が形成されることで、加工部5によって加工を行うことができ、加工効率の向上に寄与できる。また、実施形態の砥石1によれば、回転移動しながらスライド移動したり、回転移動しながら傾斜移動したりすることで周端面1Aaおよび側面1Abが加工対象Gに接触するため、側面1Abに加工部5が形成されることで、加工部5によって加工を行うことができ、加工効率の向上に寄与できる。加工部5は、砥粒3の大きさやパターンが異なる複数の区分5A~5Hを構成するため、加工部4と同様に加工効率を向上できる。 According to the grindstone 1 of this embodiment, as the processing proceeds by the processing portion 4 of the peripheral end surface 1Aa, the side surface 1Ab comes into contact with the side wall of the concave portion of the processing object G formed by processing. Therefore, according to the grindstone 1 of the embodiment, since the processing portion 5 is formed on the side surface 1Ab, processing can be performed by the processing portion 5, which contributes to improvement in processing efficiency. Further, according to the grindstone 1 of the embodiment, since the peripheral end surface 1Aa and the side surface 1Ab come into contact with the workpiece G by sliding while rotating or tilting while rotating, the side surface 1Ab can be processed. By forming the portion 5, the processing can be performed by the processing portion 5, which can contribute to the improvement of the processing efficiency. Since the processing section 5 comprises a plurality of sections 5A to 5H having different sizes and patterns of the abrasive grains 3, the processing efficiency can be improved similarly to the processing section 4.

図4は、実施形態に係る砥石の周端面を視た平面図である。 FIG. 4 is a plan view of the peripheral end surface of the grindstone according to the embodiment.

実施形態の砥石1では、図4に示すように、砥粒3が固定される加工部6が回転の周方向に沿って配置される。加工部6は、台金1Aの周端面1Aaに設けられ、複数の凸部6Aおよび凹部6Bを有する。凸部6Aと凹部6Bは、台金1Aの周端面1Aaにおいて径方向に向けた凹凸として設けられ、回転の軸(軸心S)の延在方向に沿って交互に配置される。凸部6Aと凹部6Bは、終端の無い環状に形成されていてもよく、螺旋状に形成されていてもよい。凸部6Aと凹部6Bは、その凹凸形状の表面に砥粒3が固定される。この砥粒3は、例えば、砥粒サイズが一定の寸法範囲とされてもよく、砥粒サイズが一定の寸法範囲のなかで大小サイズがランダムに分布されてもよい。 In the grindstone 1 of the embodiment, as shown in FIG. 4, the working portion 6 to which the abrasive grains 3 are fixed is arranged along the circumferential direction of rotation. The processed portion 6 is provided on the peripheral end surface 1Aa of the base metal 1A and has a plurality of convex portions 6A and concave portions 6B. The convex portions 6A and the concave portions 6B are provided as concave and convex portions oriented in the radial direction on the peripheral end surface 1Aa of the base metal 1A, and are alternately arranged along the extending direction of the rotation axis (axis center S). The convex portion 6A and the concave portion 6B may be formed in an endless annular shape, or may be formed in a spiral shape. Abrasive grains 3 are fixed to the uneven surfaces of the projections 6A and the recesses 6B. The abrasive grains 3 may have, for example, a constant size range, or may have large and small sizes randomly distributed within the constant size range.

この実施形態の砥石1によれば、回転移動しながらスライド移動することで、スライド移動の方向に応じて各凸部6Aの表面やエッジが加工対象Gに対して異なる状態で接触するため、砥粒3による研削状態に変化をもたらすことができ、疑似的な砥粒循環を生じさせ、加工効率を向上できる。 According to the grindstone 1 of this embodiment, by sliding while rotating, the surfaces and edges of the respective projections 6A come into contact with the workpiece G in different states depending on the direction of slide movement. It is possible to bring about a change in the grinding state by the grains 3, to generate a pseudo grain circulation, and to improve the processing efficiency.

なお、加工部6の凸部6Aと凹部6Bは、台金1Aの形状によらず砥粒3の砥粒サイズによって構成してもよい。また、加工部6の凸部6Aの凹部6Bに加えて、加工部4や加工部5を適用してもよい。 The protrusions 6A and the recesses 6B of the processed portion 6 may be configured by the abrasive grain size of the abrasive grains 3 regardless of the shape of the base metal 1A. Moreover, in addition to the concave portion 6B of the convex portion 6A of the processed portion 6, the processed portion 4 and the processed portion 5 may be applied.

図5および図6は、実施形態に係る砥石の側面図である。 5 and 6 are side views of the grindstone according to the embodiment.

実施形態の砥石1では、図5および図6に示すように、砥粒3が固定される加工部7が回転の周方向に沿って配置される。加工部7は、台金1Aの周端面1Aaに設けられ、複数の凸部7Aおよび凹部7Bを有する。凸部7Aと凹部7Bは、台金1Aの周端面1Aaにおいて径方向に向けた凹凸として設けられ、周方向に沿って交互に配置される。図5に示す凸部7Aおよび凹部7Bは、凸部7Aが頂部7Aaに向けて径方向に突出する傾斜面で形成され、凹部7Bが頂部7Aaの間で前記傾斜面が径方向に凹む形状で形成される。また、図6に示す凸部7Aおよび凹部7Bは、凸部7Aが径方向に突出する突起として形成され、凹部7Bが突起の間で凹む形状で形成される。凸部7Aおよび凹部7Bは、図5および図6で示す側面視の形状が回転の軸(軸心S)の延在方向に連続して形成される。凸部7Aと凹部7Bは、その凹凸形状の表面に砥粒3が固定される。この砥粒3は、例えば、砥粒サイズが一定の寸法範囲とされてもよく、砥粒サイズが一定の寸法範囲のなかで大小サイズがランダムに分布されてもよい。 In the grindstone 1 of the embodiment, as shown in FIGS. 5 and 6, the working portion 7 to which the abrasive grains 3 are fixed is arranged along the circumferential direction of rotation. The processed portion 7 is provided on the peripheral end surface 1Aa of the base metal 1A and has a plurality of convex portions 7A and concave portions 7B. The protrusions 7A and the recesses 7B are provided as protrusions and recesses directed in the radial direction on the peripheral end surface 1Aa of the base metal 1A, and are arranged alternately along the peripheral direction. The convex portion 7A and the concave portion 7B shown in FIG. 5 are formed with inclined surfaces that radially protrude toward the top portion 7Aa, and the concave portion 7B has a shape in which the inclined surface is concave in the radial direction between the top portions 7Aa. It is formed. Moreover, the convex portion 7A and the concave portion 7B shown in FIG. 6 are formed as projections that protrude in the radial direction, and the concave portion 7B is formed in a shape that is recessed between the projections. The convex portion 7A and the concave portion 7B are formed so that the shape of the side view shown in FIGS. 5 and 6 continues in the extending direction of the axis of rotation (axis center S). Abrasive grains 3 are fixed to the uneven surfaces of the projections 7A and the recesses 7B. The abrasive grains 3 may have, for example, a constant size range, or may have large and small sizes randomly distributed within the constant size range.

この実施形態の砥石1によれば、回転移動することで、回転移動の方向に応じて凸部7Aおよび凹部7Bの表面やエッジが加工対象Gに対して異なる状態で接触するため、砥粒3による研削状態に変化をもたらすことができ、疑似的な砥粒循環を生じさせ、加工効率を向上できる。 According to the grindstone 1 of this embodiment, the surfaces and edges of the projections 7A and the recesses 7B come into contact with the workpiece G in different states depending on the direction of the rotational movement. It is possible to bring about a change in the grinding state due to the grinding, to generate a pseudo-abrasive grain circulation, and to improve the processing efficiency.

なお、加工部7の凸部7Aと凹部7Bは、台金1Aの形状によらず砥粒3の砥粒サイズによって構成してもよい。また、加工部7の凸部7Aの凹部7Bに加えて、加工部4や加工部5を適用してもよい。また、加工部7の凸部7Aの凹部7Bに加えて、加工部6の凸部6Aの凹部6Bを適用してもよい。 The protrusions 7A and the recesses 7B of the processed portion 7 may be configured by the abrasive grain size of the abrasive grains 3 regardless of the shape of the base metal 1A. Moreover, in addition to the concave portion 7B of the convex portion 7A of the processed portion 7, the processed portion 4 and the processed portion 5 may be applied. Moreover, in addition to the concave portion 7B of the convex portion 7A of the processed portion 7, the concave portion 6B of the convex portion 6A of the processed portion 6 may be applied.

1 砥石
1A 台金
1Aa 周端面
1Ab 側面
3 砥粒
4 加工部
4A,4B,4C,4D,4E,4F,4G,4H 区分
5 加工部
5A,5B,5C,5D,5E,5F,5G,5H 区分
6 加工部
6A 凸部
6B 凹部
7 加工部
7A 凸部
7B 凹部
S 軸心(回転の軸)
1 grinding wheel 1A base metal 1Aa peripheral end surface 1Ab side surface 3 abrasive grains 4 processed parts 4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H Section 5 processed parts 5A, 5B, 5C, 5D, 5E, 5F, 5G, 5H Section 6 Machined portion 6A Convex portion 6B Concave portion 7 Machined portion 7A Convex portion 7B Concave portion S Axial center (axis of rotation)

Claims (7)

砥粒が固定される加工部が回転の周方向に沿って配置される砥石であって、
前記加工部は、周方向に沿って複数の区分を構成し、複数の前記区分は、前記砥粒の大きさやパターンが異なる、砥石。
A grindstone in which a processing portion to which abrasive grains are fixed is arranged along the circumferential direction of rotation,
The grindstone, wherein the processing portion comprises a plurality of sections along the circumferential direction, and the plurality of sections have different sizes and patterns of the abrasive grains.
前記加工部は、回転の軸を中心とした円周の周端面に形成される、請求項1に記載の砥石。 2. The grindstone according to claim 1, wherein said processed portion is formed on a circumferential end face of a circumference centered on an axis of rotation. 前記加工部は、前記周端面に連続して前記回転の軸の延在方向に向く側面にも形成される、請求項2に記載の砥石。 3. The grindstone according to claim 2, wherein the processed portion is also formed on a side surface that is continuous with the peripheral end surface and faces the extending direction of the axis of rotation. 前記加工部は、凸部および凹部を有する、請求項1から3のいずれか1項に記載の砥石。 The whetstone according to any one of claims 1 to 3, wherein the processing portion has a convex portion and a concave portion. 砥粒が固定される加工部が回転の周方向に沿って配置される砥石であって、
前記加工部は、凸部および凹部を有する、砥石。
A grindstone in which a processing portion to which abrasive grains are fixed is arranged along the circumferential direction of rotation,
The grindstone, wherein the processing portion has a convex portion and a concave portion.
前記凸部と前記凹部は、回転の軸を中心とした円周の周端面に形成され、前記回転の軸の延在方向に沿って交互に配置される、請求項4または5に記載の砥石。 6. The grindstone according to claim 4 or 5, wherein the protrusions and the recesses are formed on a circumferential end face of a circumference centered on the axis of rotation, and arranged alternately along the extending direction of the axis of rotation. . 前記凸部と前記凹部は、回転の軸を中心とした円周の周端面に形成され、前記周方向に沿って交互に配置される、請求項4から6のいずれか1項に記載の砥石。 7. The grindstone according to any one of claims 4 to 6, wherein the protrusions and the recesses are formed on a circumferential end face of a circumference centered on the axis of rotation and arranged alternately along the circumferential direction. .
JP2021110858A 2021-07-02 2021-07-02 Grinding wheel Pending JP2023007788A (en)

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