JP5352977B2 - Dress gear - Google Patents

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JP5352977B2
JP5352977B2 JP2007232886A JP2007232886A JP5352977B2 JP 5352977 B2 JP5352977 B2 JP 5352977B2 JP 2007232886 A JP2007232886 A JP 2007232886A JP 2007232886 A JP2007232886 A JP 2007232886A JP 5352977 B2 JP5352977 B2 JP 5352977B2
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abrasive
abrasive grain
tooth
tooth profile
grain layer
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JP2009061560A (en
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博充 田中
和寛 藤嵜
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Mitsubishi Materials Corp
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Mitsubishi Materials Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrodeposition tool having an abrasive grain layer formed on the surface of a tooth profile, which supplies a grinding coolant to a processing section of a workpiece by surely retaining the grinding coolant on the abrasive grain layer and effectively remove chips and processing heat generated during grinding. <P>SOLUTION: In the electrodeposition tool, in which the abrasive grain layer 3 is formed by electrodepositing abrasive grains 3a on the surface of the tooth profile 2 formed on a base metal 1, numerous dimples 4 are formed on the surface of the abrasive grain layer 3. The dimple 4 is formed so as to be larger in its diameter X and shallower in its depth Y than a mean grain size of the abrasive grain 3a. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

本発明は、台金に形成された歯形の表面に砥粒が電着されたドレスギアに関するものである。 The present invention relates to Doresugia abrasive grains are electrodeposited on the surface of the teeth formed on the base metal.

ドレスギア等の電着工具は、砥粒層が形成された歯形をワークとしての歯車や内歯車型砥石等の歯形に噛合させて回転することにより、歯車の歯を仕上げ加工したり内歯車型砥石等の歯形の砥粒層をドレッシングしたりするのに使用される。このうち、内歯車型砥石をドレッシングするドレスギアとしては例えば特許文献１に記載されているものなどが提案され、また円環状の台金の内周に上記歯形が形成された電着内歯車型砥石としては特許文献２に記載のようなものが、さらに台金の外周にネジ状の歯形が形成された電着ネジ状工具（ウォーム状工具）としては特許文献３に記載のようなものが提案されている。 An electrodeposition tool such as a dress gear is used to finish the gear teeth or rotate the internal gear type grinding wheel by meshing and rotating the tooth profile formed with the abrasive grain layer with a tooth profile such as a gear or internal gear type grinding wheel as a workpiece. For example, it is used for dressing a layer of abrasive grains having a tooth profile. Among these, as a dressing gear for dressing an internal gear type grindstone, for example, the one described in Patent Document 1 is proposed, and the electrodeposition internal gear type grindstone in which the above-described tooth shape is formed on the inner periphery of an annular base metal. As described in Patent Document 2, and as an electrodeposition screw tool (worm-shaped tool) in which a screw-like tooth profile is formed on the outer periphery of the base metal, a tool as described in Patent Document 3 is proposed. Has been.

ところで、このような電着工具によってワークの仕上げ加工やドレッシングを行う際には、加工の際に生じる細かい切粉等の除去や加工部位の冷却のために研削油剤が供給されるが、上述のように台金に形成された歯形に砥粒層が形成された電着工具では、歯形の形状が複雑であるため、その表面の砥粒層に研削油剤を十分に保持して確実にワークに供給するとともに加工部位で生じた切粉や熱をこの研削油剤とともに効率的に除去することは容易ではない。このため、工具やワークの加工部位の冷却が不十分となって熱による損傷を生じたり、除去しきれずに残った切粉によりワークの歯面が傷つけられて加工品位が損なわれたりするおそれがあった。   By the way, when performing finish processing or dressing of a workpiece with such an electrodeposition tool, grinding oil is supplied for removing fine chips generated during processing and cooling the processing site. In an electrodeposition tool in which the abrasive layer is formed on the tooth profile formed on the base metal, the shape of the tooth profile is complicated. It is not easy to efficiently remove chips and heat generated at the processing site together with the grinding oil as well as being supplied. For this reason, there is a possibility that the processing part of the tool or workpiece will be insufficiently cooled, causing damage due to heat, or the tooth surface of the workpiece may be damaged by the remaining chips that cannot be removed and the processing quality may be impaired. there were.

本発明は、このような背景の下になされたもので、上述のような歯形の表面に砥粒層が形成されたドレスギアにおいて、この砥粒層に研削油剤を確実に保持してワークの加工部位に供給し、加工時に発生する切粉や加工熱を効率的に除去することが可能なドレスギアを提供することを目的としている。 The present invention has been made under such a background. In a dress gear in which an abrasive grain layer is formed on the surface of the tooth profile as described above, the grinding oil is securely held in the abrasive grain layer to process a workpiece. An object of the present invention is to provide a dress gear that can be supplied to a part and can efficiently remove chips and heat generated during processing.

上記課題を解決して、このような目的を達成するために、本発明は、台金に形成された歯形の表面に砥粒が電着されて砥粒層が形成されているドレスギアであって、上記砥粒層の表面には多数のディンプルが形成され、上記ディンプルは、上記歯形の歯面と歯先面にそれぞれ成形されるとともに、上記砥粒の平均粒径よりも径が大きくかつ深さが浅く形成されて開口部が円形をなす凹球面状の凹部によって形成され、該ディンプルには複数の上記砥粒が固着され、上記砥粒層には、上記砥粒が電着された上でツルーイングが施されていることを特徴とする。従って、このようなドレスギアによれば、砥粒層表面に形成された多数のディンプルすなわち窪みに研削油剤を保持することができるので、そのままワークの加工部位に確実に研削油剤を供給し、ワークから除去された切粉や加工熱を効率的に加工部位から奪い取って排出、発散することができる。 In order to solve the above-described problems and achieve such an object, the present invention provides a dress gear in which abrasive grains are electrodeposited on the surface of a tooth profile formed on a base metal to form an abrasive grain layer. A large number of dimples are formed on the surface of the abrasive grain layer, and the dimples are respectively formed on the tooth surface and the tooth tip surface of the tooth profile, and have a diameter larger than the average particle diameter of the abrasive grains and a depth thereof. The dimples are formed with a plurality of abrasive grains fixed to each other, and the abrasive grains are electrodeposited on the abrasive grain layer. It is characterized by truing. Therefore, according to such a dress gear , the grinding oil can be held in a large number of dimples, that is, dents formed on the surface of the abrasive layer, so that the grinding oil can be reliably supplied to the processing portion of the work as it is, The removed chips and processing heat can be efficiently taken away from the processing site and discharged and emitted.

また、上記ディンプルを、上記砥粒の平均粒径よりも径が大きく、かつ深さが浅くなるように形成しているので、このディンプル内にも砥粒を電着して配設することができ、このときディンプル内の砥粒は、その突き出し量がディンプル外の砥粒よりもディンプル深さ分だけ大きくなる。従って、このディンプル外の砥粒が加工により摩耗したりした場合には、このディンプル内の砥粒が突出して砥粒層の切れ味を維持することができるので、長期に亙って鋭い切れ味を砥粒層に確保することができ、寿命の長い電着工具を提供することが可能となる。なお、このようにディンプル外の砥粒の摩耗を待たずに、上記砥粒層に、上記砥粒が電着された上でツルーイングを施した場合にも同様の効果を得ることができる。 In addition, since the dimple is formed so as to have a diameter larger than the average grain size of the abrasive grain and a shallow depth , the abrasive grain can be electrodeposited in the dimple. At this time, the amount of protrusion of the abrasive grains in the dimple is larger by the dimple depth than the abrasive grains outside the dimple. Therefore, when the abrasive grains outside the dimple are worn due to processing, the abrasive grains in the dimple can protrude and maintain the sharpness of the abrasive layer. It is possible to provide an electrodeposition tool that can be secured in the particle layer and has a long life. In addition, the same effect can be obtained even when truing is performed on the above-mentioned abrasive grain layer after the above-mentioned abrasive grains are electrodeposited without waiting for the abrasion of the abrasive grains outside the dimples.

さらに、上記ディンプルは、例えば上記歯形の表面に凹凸を有する下地めっき層を形成し、その上に砥粒を分散しつつ電着めっき層を析出させて砥粒層を形成することにより、この下地めっき層の凹凸の凹部を該ディンプルとするような方法でも形成可能であるが、このような方法では、下地めっき層の有無によって砥粒や砥粒層の付着強度に部分的に相違が生じ、凸部で砥粒が脱落しやすくなったり、砥粒層が剥離しやすくなったりするおそれがある。また、特に本発明の電着工具のように複雑な形状の歯形の表面に所望の凹凸を有する下地めっき層を形成するのは困難でもある。   Further, the dimple is formed, for example, by forming a ground plating layer having irregularities on the surface of the tooth profile, and depositing an electrodeposition plating layer while dispersing abrasive grains thereon to form an abrasive grain layer. Although it can be formed by a method in which the concave and convex portions of the plating layer are used as the dimple, in such a method, a difference occurs in the adhesion strength of the abrasive grains and the abrasive layer depending on the presence or absence of the base plating layer, There is a possibility that the abrasive grains easily fall off at the convex portions, and the abrasive grain layer easily peels off. In addition, it is also difficult to form a base plating layer having desired irregularities on the surface of a tooth shape having a complicated shape, particularly like the electrodeposition tool of the present invention.

そこで、このような問題を解消するには、上記ディンプルを、上記歯形の表面に成形された多数の凹部によって形成するようにして、すなわちこの歯形表面の凹部がそのまま砥粒層表面のディンプルとなるように砥粒を電着するのが望ましい。なお、このように台金の歯形表面に多数の凹部を成形するには、例えばドリルやエンドミル等の工具によって所望の位置に所望の大きさ、深さの凹部を直接的に形成してもよいが、成形すべき凹部の大きさや深さに応じた径の粒子（メディア）を台金の歯形表面に所定の圧力の流体によって吹きつけることにより、サンドブラスト等の方法によって成形するようにすれば、複雑な形状の歯形の表面にも確実に所望の凹部を形成することが可能となる。   Therefore, in order to solve such a problem, the dimple is formed by a large number of concave portions formed on the surface of the tooth profile, that is, the concave portion of the tooth profile surface becomes the dimple on the surface of the abrasive layer as it is. Thus, it is desirable to electrodeposit abrasive grains. In order to form a large number of recesses on the tooth profile surface of the base metal as described above, recesses having a desired size and depth may be directly formed at a desired position by a tool such as a drill or an end mill. However, by spraying particles (media) having a diameter corresponding to the size and depth of the concave portion to be molded onto the tooth profile surface of the base metal with a fluid having a predetermined pressure, the molding is performed by a method such as sand blasting. It is possible to reliably form a desired concave portion on the surface of a complex-shaped tooth profile.

以上説明したように、本発明によれば、歯形の形状が複雑であっても、その砥粒層表面に形成されたディンプルに研削油剤を保持して確実に加工部位に供給することができ、加工時に発生する熱や切屑を除去して効率的に排出、発散することが可能となる。そして、これにより、加工熱によってワークやドレスギアに損傷が生じたりするのを防ぐことができるとともに、切粉によってワークの仕上げ面が傷つけられたりするのも防ぐことができ、加工品位の向上を図ることが可能となる。 As described above, according to the present invention, even if the shape of the tooth profile is complicated, the grinding oil can be held in the dimple formed on the surface of the abrasive layer and reliably supplied to the processing site. Heat and chips generated during processing can be removed and efficiently discharged and emitted. As a result, the work heat and dress gear can be prevented from being damaged by the processing heat, and the finished surface of the work can be prevented from being damaged by the chips, thereby improving the processing quality. It becomes possible.

図１ないし図４は、本発明の実施形態を示すものであって、本発明をドレスギアに適用した場合を示すものである。本実施形態のドレスギアＡにおいて、台金１は鋼材等の金属材料により概略円板状に形成されており、その外周部には、この台金１の周方向を向く一対の歯面２ａと外周側を向く歯先面２ｂとを備えた複数条の歯形２が、周方向に等間隔をなして突出するように、かつこの台金の軸線Ｏ方向に向けて螺旋状に捩れるようにして、該軸線Ｏに直交する断面において歯車形をなすように形成されている。そして、少なくともこれらの歯形２の表面には、ダイヤモンド砥粒やｃＢＮ砥粒等の超砥粒３ａをＮｉめっき等のめっき層３ｂに分散して固着した砥粒層３が形成されており、さらにこの砥粒層３の表面には多数のディンプル４が形成されている。 1 to 4, there is shown an embodiment of the present invention shows a case where the present invention is applied to Doresugia. In the dress gear A of the present embodiment, the base metal 1 is formed in a substantially disc shape from a metal material such as a steel material, and a pair of tooth surfaces 2 a facing the circumferential direction of the base metal 1 and an outer periphery are formed on the outer peripheral portion thereof. A plurality of tooth profiles 2 having tooth tip surfaces 2b facing side are projected at equal intervals in the circumferential direction and spirally twisted toward the axis O direction of the base metal. In the cross-section orthogonal to the axis O, it is formed to have a gear shape. And at least on the surfaces of these tooth profiles 2, there is formed an abrasive layer 3 in which superabrasive grains 3a such as diamond abrasive grains and cBN abrasive grains are dispersed and fixed to a plating layer 3b such as Ni plating, A large number of dimples 4 are formed on the surface of the abrasive grain layer 3.

図２は、台金１に形成された歯形２の１つを、その捩れを解くように展開して図示したものであるが、この図２に示すように本実施形態におけるディンプル４は、歯形２の上記両歯面２ａと歯先面２ｂとに満遍なく形成されており、その砥粒層３表面への開口部の形状は概ね円形をなすとともに、この円の直径Ｘに沿って該表面に直交する断面では図３や図４に示すように上記直径Ｘよりも小さい（浅い）深さＹの凹円弧状をなすような、概略凹球面状の窪みとして形成されている。ここで、これら図２から図４では個々のディンプル４は互いに独立して不連続となるように、すなわち互いに重なり合わないように形成されているが、部分的に、あるいは全体的に連続して重なり合うように形成されていてもよい。   FIG. 2 shows one of the tooth profiles 2 formed on the base metal 1 expanded so as to release the twist. As shown in FIG. 2, the dimple 4 in this embodiment has a tooth profile. 2 are uniformly formed on both the tooth surface 2a and the tooth tip surface 2b, and the shape of the opening to the surface of the abrasive layer 3 is substantially circular, and the surface along the diameter X of this circle As shown in FIGS. 3 and 4, the cross section perpendicular to the cross section is formed as a substantially concave spherical recess having a concave arc shape having a depth Y smaller (shallow) than the diameter X. Here, in FIGS. 2 to 4, the individual dimples 4 are formed so as to be discontinuous independently of each other, that is, so as not to overlap each other, but partially or entirely continuously. You may form so that it may overlap.

このようなディンプル４は、本実施形態では砥粒層３を形成する前の台金１の歯形２の表面（一対の歯面２ａと歯先面２ｂ）に、ドリルやエンドミル等による穴明け加工を施したり、あるいはディンプル４がなす凹球面と略等しい径の球形をなす硬質粒子をメディアとして高圧の圧縮空気等の流体により吹き付けるサンドブラストを施したりすることにより、図３および図４に示すような凹部５を多数成形し、こうして成形した凹部５も含めて歯形２の表面に、必要に応じて均一な厚さの下地めっきを施した上で、超砥粒３ａを分散しためっき液中に台金１を浸漬して通電することにより略均一な厚さの砥粒層３を形成することで、凹部５の凹みの形状がそのまま砥粒層３の表面に窪みとして表れるようにして形成される。   In this embodiment, such dimples 4 are formed in the surface of the tooth profile 2 (a pair of tooth surfaces 2a and tip surfaces 2b) of the base metal 1 before forming the abrasive grain layer 3 by a drill, an end mill or the like. 3 or FIG. 4, or by applying sand blasting with hard particles having a spherical shape having a diameter substantially equal to the concave spherical surface formed by the dimples 4 by a fluid such as high-pressure compressed air. A number of recesses 5 are formed, and the surface of the tooth profile 2 including the recesses 5 thus formed is subjected to base plating with a uniform thickness as required, and then placed in a plating solution in which superabrasive grains 3a are dispersed. By forming the abrasive grain layer 3 having a substantially uniform thickness by immersing the gold 1 and energizing it, the concave shape of the recess 5 is formed as it appears on the surface of the abrasive grain layer 3 as it is. .

ここで、凹部５をドリルやエンドミルによる穴明け加工によって形成した場合には、図２ないし図４に示したように、少なくとも一部あるいはすべてのディンプル４を互いに独立して形成することができ、また上記サンドブラストによって形成した場合には、ディンプル４は上述したように少なくとも一部あるいは全部が互いに連続して重なり合うように形成される。また、本実施形態では、図３および図４に示すようにディンプル４および凹部５の大きさは、その上記直径Ｘが超砥粒３ａの平均粒径よりも大きく、かつその上記深さＹはこの超砥粒３ａの平均粒径よりも小さくなるようにされていて、ディンプル４および凹部５内にも望ましくは複数個の超砥粒３ａが固着され、かつこのディンプル４および凹部５内に固着された超砥粒３ａが、砥粒層３のめっき層３ｂ表面から突き出すようにされている。   Here, when the recess 5 is formed by drilling with a drill or an end mill, as shown in FIGS. 2 to 4, at least a part or all of the dimples 4 can be formed independently of each other, Further, when formed by sandblasting, the dimples 4 are formed such that at least a part or all of them are continuously overlapped with each other as described above. In the present embodiment, as shown in FIGS. 3 and 4, the dimples 4 and the recesses 5 are such that the diameter X is larger than the average grain size of the superabrasive grains 3a and the depth Y is The superabrasive grains 3 a are made smaller than the average grain size, and a plurality of superabrasive grains 3 a are preferably fixed in the dimples 4 and the recesses 5, and fixed in the dimples 4 and the recesses 5. The superabrasive grains 3a thus made protrude from the surface of the plating layer 3b of the abrasive grain layer 3.

なお、図３はこうして歯形２の表面に超砥粒３ａを固着して砥粒層３を形成したままの状態を示しているが、特に凹部５をサンドブラストによって形成したりしてディンプル４を部分的にでも連続するように形成した場合には、図４に示すように砥粒層３の表面にツルーイングを施して、特にディンプル４の外に固着された超砥粒３ａの突き出し量を均一にし、ディンプル４内を除いた砥粒層３の外形形状、寸法を、加工すべきワークに応じたものに整形してもよい。   FIG. 3 shows the state in which the superabrasive grains 3a are fixed to the surface of the tooth profile 2 and the abrasive grain layer 3 is still formed. In particular, the dimple 4 is partially formed by forming the recess 5 by sandblasting. In the case of continuous formation, the surface of the abrasive grain layer 3 is subjected to truing as shown in FIG. 4 so that the protruding amount of the superabrasive grains 3a fixed to the outside of the dimple 4 is made uniform. The outer shape and dimensions of the abrasive grain layer 3 excluding the inside of the dimple 4 may be shaped according to the workpiece to be processed.

このように構成された本実施形態のドレスギアＡは、例えば図５に示すように、内歯車型砥石Ｂの円環状をなす台金１１の内周部に形成された歯形１２と互いの軸線Ｏ，Ｐが所定の軸交差角をもつようにして噛合させられ、これらの軸線Ｏ，Ｐ回りに互いに回転させられることにより、上記歯形１２の表面に形成された砥粒層１３のドレッシング（目立て）を行うのに使用される。なお、この内歯車型砥石Ｂにおいても、その歯形１２は円環状をなす台金１１の軸線Ｐ方向に向けて螺旋状に捩れるように形成されている。ただし、その周方向を向く両歯面１２ａは、当該内歯車型砥石Ｂにより加工されるワークである被削歯車の歯形形状に応じて図６に示すように断面凹曲面状に形成され、この両歯面１２ａおよび歯底面１２ｃとに上記砥粒層１３が形成されている。   For example, as shown in FIG. 5, the dress gear A of the present embodiment configured as described above has a tooth profile 12 formed on the inner peripheral portion of the base 11 that forms an annular shape of the internal gear type grindstone B and the axis O of each other. , P are engaged with each other so as to have a predetermined axis crossing angle, and rotated around these axes O, P, thereby dressing (sharpening) the abrasive layer 13 formed on the surface of the tooth profile 12. Used to do. In this internal gear type grindstone B, the tooth profile 12 is formed so as to be spirally twisted in the direction of the axis P of the annular base 11. However, both tooth surfaces 12a facing in the circumferential direction are formed in a concave curved cross-section as shown in FIG. 6 according to the tooth shape of the work gear that is a workpiece processed by the internal gear type grindstone B. The abrasive grain layer 13 is formed on both the tooth surfaces 12a and the tooth bottom surface 12c.

このようにして本実施形態のドレスギアＡによりドレッシングを行う際には、ワークである内歯車型砥石Ｂの歯形１２と噛合するその歯形２に向けて、研削油剤が図示されないノズル等から供給されるが、このとき本実施形態によれば、この歯形２の歯面２ａおよび歯先面２ｂに形成された砥粒層３の表面に多数のディンプル４が形成されているので、研削油剤がこれらのディンプル４内に保持されることにより、このように歯形２と歯形１２が噛み合うために研削油剤を直接的に供給することが困難な加工部位に対しても確実な研削油剤の供給を図ることができる。従って、加工時に発生する細かい切粉や熱を該研削油剤によって加工部位から効率的に除去して排出、発散させることができ、ドレスギアＡやワークとしての内歯車型砥石Ｂの損傷を防いで、工具寿命の延長を図ることができる。   Thus, when performing dressing with the dress gear A of the present embodiment, the grinding oil is supplied from a nozzle or the like (not shown) toward the tooth profile 2 that meshes with the tooth profile 12 of the internal gear type grindstone B that is a workpiece. However, at this time, according to the present embodiment, since a large number of dimples 4 are formed on the surface of the abrasive grain layer 3 formed on the tooth surface 2a and the tooth tip surface 2b of the tooth profile 2, the grinding oil is added to these surfaces. By being held in the dimple 4, the tooth profile 2 and the tooth profile 12 are engaged with each other in this manner, so that it is possible to reliably supply the grinding fluid even to a machining site where it is difficult to directly supply the grinding fluid. it can. Therefore, the fine chips and heat generated during processing can be efficiently removed from the processing site by the grinding oil agent to be discharged and diffused, and the dress gear A and the internal gear type grindstone B as a work can be prevented from being damaged. The tool life can be extended.

また、本実施形態では、上記ディンプル４の直径Ｘが砥粒層３に固着される超砥粒３ａの平均粒径よりも大きく、かつディンプル４の深さＹが平均粒径よりも小さく（浅く）なるようにされており、これによりディンプル４内にも超砥粒３ａを固着することができるとともに、このディンプル４内の超砥粒３ａの突き出し量を図３や特に図４に示すようにディンプル４外の超砥粒３ａの突き出し量よりも大きくすることができる。従って、図３に示したようにこのディンプル４外の超砥粒３ａにツルーイングを施していない場合は勿論、図４に示したようにディンプル４外の超砥粒３ａにツルーイングを施した場合でも、これらディンプル４外の超砥粒３ａに摩耗が生じた場合にはディンプル４内の超砥粒３ａが突き出して、砥粒層３の切れ味を維持することができる。このため、図３や図４に示したように超砥粒３ａが単層で固着された砥粒層３においても、鋭い切れ味を長期に亙って確保することができ、これによっても寿命の長い工具を提供することが可能となる。   In the present embodiment, the diameter X of the dimple 4 is larger than the average particle diameter of the superabrasive grains 3a fixed to the abrasive grain layer 3, and the depth Y of the dimple 4 is smaller than the average particle diameter (shallow). Thus, the superabrasive grains 3a can be fixed in the dimple 4 as well, and the protruding amount of the superabrasive grains 3a in the dimple 4 is as shown in FIG. 3 and particularly in FIG. The protruding amount of the superabrasive grains 3a outside the dimple 4 can be made larger. Therefore, as shown in FIG. 3, not only truing is applied to the superabrasive grains 3a outside the dimple 4, but also when truing is applied to the superabrasive grains 3a outside the dimple 4, as shown in FIG. When the superabrasive grains 3a outside the dimples 4 are worn, the superabrasive grains 3a in the dimples 4 protrude and the sharpness of the abrasive layer 3 can be maintained. For this reason, as shown in FIG. 3 and FIG. 4, even in the abrasive grain layer 3 in which the superabrasive grains 3a are fixed as a single layer, a sharp sharpness can be ensured over a long period of time, and this also increases the lifetime. A long tool can be provided.

さらに、本実施形態では、これらのディンプル４が、台金１における歯形２の歯面２ａおよび歯先面２ｂに凹部５を形成して、その上に超砥粒３ａをめっき層３ｂで固着した砥粒層３を形成することで、該砥粒層３の表面に形成されるようになされており、台金１の表面からの砥粒層３の厚さが均一となるため、部分的に超砥粒３ａが脱落し易くなったり、砥粒層３が剥離しやすくなったりするようなこともない。また、上述のような形状、寸法のディンプル４を画成する凹部５を形成するのも比較的容易である。   Further, in the present embodiment, these dimples 4 form recesses 5 in the tooth surface 2a and the tooth tip surface 2b of the tooth profile 2 in the base metal 1, and the superabrasive grains 3a are fixed thereon by the plating layer 3b. By forming the abrasive grain layer 3, it is formed on the surface of the abrasive grain layer 3, and the thickness of the abrasive grain layer 3 from the surface of the base metal 1 becomes uniform. The superabrasive grains 3a do not easily fall off, and the abrasive grain layer 3 does not easily peel off. It is also relatively easy to form the recess 5 that defines the dimple 4 having the shape and dimensions as described above.

なお、このような凹部５を形成するのに際して、上述のようなドリルやエンドミルによる穴明け加工による場合には、個々の凹部５の形成自体は容易であるものの、複数の歯形２に多数の凹部５を形成するには多くの時間を要することになる。ただし、その反面、複数のディンプル４を独立して形成することが可能であって、逆にディンプル４外にも十分な面積を歯形２の表面全体に亙って確保することができるので、この表面の砥粒層３の外形形状、寸法を、ディンプル４が形成されていない場合との誤差が少なくなるようにすることができるという効果が得られる。   In forming such recesses 5, if the above-described drilling or end milling is used to form the recesses 5, the individual recesses 5 can be easily formed, but a large number of recesses are formed in the plurality of tooth profiles 2. It takes a lot of time to form 5. However, on the other hand, a plurality of dimples 4 can be formed independently, and conversely, a sufficient area outside the dimples 4 can be secured over the entire surface of the tooth profile 2. There is an effect that the outer shape and dimensions of the surface abrasive grain layer 3 can be reduced in error from the case where the dimple 4 is not formed.

これに対して、上述のようなサンドブラストによる場合には、逆に凹部５の形成は短時間でより簡単に行うことができる反面、凹部５が連続してしまう可能性が大きいため複数のディンプル４も連続してしまい、これらのディンプル４が連続する部分では超砥粒３ａの突き出し量も小さくなるため、ディンプル４が形成されていない場合の砥粒層３の外形形状、寸法との誤差が、穴明け加工の場合よりも大きくなるおそれがある。ただし、このようにディンプル４が連続することにより、連続したディンプル４間で研削油剤の流動を促すことができて、一層確実な研削油剤の供給および切粉や加工熱の排出、発散を図ることができるという利点を得ることができるので、ディンプル４をどのように形成するかは、上述した凹凸する下地めっき層を形成する場合も含めて、当該電着工具の用途に応じて決定するのが望ましい。   On the other hand, in the case of sandblasting as described above, the formation of the recesses 5 can be performed more easily in a short time, but on the other hand, since there is a high possibility that the recesses 5 will continue, a plurality of dimples 4 are provided. Since the amount of protrusion of the superabrasive grains 3a is reduced at the portion where these dimples 4 are continuous, an error from the outer shape and dimensions of the abrasive layer 3 when the dimples 4 are not formed, There is a risk that it will be larger than in the case of drilling. However, the continuous dimples 4 can promote the flow of the grinding fluid between the continuous dimples 4, and can supply the grinding fluid more reliably, and discharge and diverge chips and processing heat. Therefore, how to form the dimple 4 is determined according to the use of the electrodeposition tool, including the case of forming the uneven plating layer described above. desirable.

次に、図７は、本発明の参考例を示すものである。すなわち、この参考例である電着ネジ状工具Ｃは、軸線Ｑを中心とした外形略円筒状をなす台金２１の外周に、この軸線Ｑ回りに螺旋状に捩れる１または複数条のネジ状の歯形２２が形成され、この歯形２２の表面に超砥粒等の砥粒が電着により固着されて砥粒層２３が形成されてなるものであり、上記軸線Ｑ回りに回転されつつ、この歯形２２をワークとしての被削歯車にウォーム状に噛合させることにより、この被削歯車の歯面の仕上げ加工等を行う。そして、この歯形２２の上記軸線Ｑ方向を向く両歯面２２ａと外周側を向く歯先面２２ｂには、実施形態と同様の多数のディンプルが実施形態と同様の方法で形成されている。 Next, FIG. 7 shows a reference example of the present invention . In other words, the electrodeposition screw-like tool C as the reference example is provided with one or a plurality of screws that are spirally twisted around the axis Q on the outer periphery of the base 21 having a substantially cylindrical shape centered on the axis Q. A tooth form 22 is formed, and abrasive grains such as superabrasive grains are fixed to the surface of the tooth form 22 by electrodeposition to form an abrasive grain layer 23. While rotating around the axis Q, The tooth profile 22 is meshed with a work gear as a workpiece in a worm shape to finish the tooth surface of the work gear. Then, this is the tooth top surface 22b facing the Ryohamen 22a and the outer periphery side facing the axis Q direction tooth 22, a large number of dimples similar to the embodiment are formed in the same manner as the embodiment.

従って、この参考例の電着ネジ状工具Ｃによれば、実施形態と同様の効果が得られる上、ワークが被削歯車であるのに対し、上述のように切粉の円滑な排出を促すことができるので、かかる切粉によって被削歯車の歯面等が傷つけられたりするのも防ぐことが可能となり、これにより高品位の加工が可能になるという効果を得ることができる。 Therefore, according to the electrodeposition screw-like tool C of this reference example , the same effect as that of the embodiment can be obtained, and the workpiece is a work gear, whereas the smooth discharge of the chips is promoted as described above. it is possible, also it becomes possible to prevent to or injured teeth surfaces or the like of the workpiece gear by such chips, thereby Ru can be obtained an effect that the processing of high-quality is made possible.

本発明の実施形態のドレスギアＡを示す斜視図である。It is a perspective view showing a Doresugia A embodiment of the present invention. 図１に示すドレスギアＡの歯形２の展開斜視図である。FIG. 3 is a developed perspective view of a tooth profile 2 of the dress gear A shown in FIG. 1. 図１に示すドレスギアＡのツルーイングを施していない砥粒層２３の拡大断面図である。It is an expanded sectional view of the abrasive grain layer 23 which has not given the truing of the dress gear A shown in FIG. 図１に示すドレスギアＡのツルーイングを施した砥粒層２３の拡大断面図である。It is an expanded sectional view of the abrasive grain layer 23 which gave the truing of the dress gear A shown in FIG. 図１に示すドレスギアＡにより電着内歯車型砥石Ｂにドレッシングを施す場合を示す斜視図である。It is a perspective view which shows the case where dressing is performed to the electrodeposition internal gear type grindstone B by the dress gear A shown in FIG. 図５に示す内歯車型砥石Ｂの歯形２２の断面図である。It is sectional drawing of the tooth profile 22 of the internal gear type grindstone B shown in FIG. 本発明の参考例の電着ネジ状工具Ｃを示す一部破断した側面図である。It is the partially broken side view which shows the electrodeposition screw-shaped tool C of the reference example of this invention.

符号の説明Explanation of symbols

１，１１，２１ 台金
２，１２，２２ 歯形
２ａ 歯面
２ｂ 歯先面
２ｃ 歯底面
３，１３，２３ 砥粒層
３ａ 超砥粒（砥粒）
３ｂ めっき層
４ ディンプル
５ 凹部
Ｘ ディンプル４（凹部５）の直径
Ｙ ディンプル４（凹部５）の深さ 1,11,21 Base metal 2,12,22 Tooth profile 2a Tooth surface 2b Tooth surface 2c Tooth bottom 3,13,23 Abrasive layer 3a Super abrasive (abrasive)
3b Plating layer 4 Dimple 5 Recess X Diameter of dimple 4 (recess 5) Y Depth of dimple 4 (recess 5)

Claims (1)

台金に形成された歯形の表面に砥粒が電着されて砥粒層が形成されているドレスギアであって、上記砥粒層の表面には多数のディンプルが形成され、
上記ディンプルは、上記歯形の歯面と歯先面にそれぞれ成形されるとともに、上記砥粒の平均粒径よりも径が大きくかつ深さが浅く形成されて開口部が円形をなす凹球面状の凹部によって形成され、
該ディンプルには複数の上記砥粒が固着され、
上記砥粒層には、上記砥粒が電着された上でツルーイングが施されていることを特徴とするドレスギア。 A dress gear in which abrasive grains are electrodeposited on the surface of the tooth profile formed on the base metal to form an abrasive grain layer, and a large number of dimples are formed on the surface of the abrasive grain layer,
The dimples are respectively formed on a tooth surface and a tip surface of the tooth profile, and are formed in a concave spherical shape having a diameter larger than the average particle diameter of the abrasive grains and a shallow depth, and an opening having a circular shape. Formed by a recess,
A plurality of the abrasive grains are fixed to the dimple,
The dressing gear , wherein the abrasive layer is trued after the abrasive grains are electrodeposited.
JP2007232886A 2007-09-07 2007-09-07 Dress gear Expired - Fee Related JP5352977B2 (en)

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JPH0634902Y2 (en) * 1987-10-31 1994-09-14 株式会社不二越 Threaded grinding tool
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JP3390137B2 (en) * 1998-04-16 2003-03-24 豊田バンモップス株式会社 A method for manufacturing a superabrasive grain in which dimples are scattered on an outer peripheral surface.
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