JP2011098397A - Method and device for centerless grinding - Google Patents
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Abstract
【課題】センタレス研削技術を改良して、研削砥石車による研削操作の待ち時間を短縮して実研削時間効率を向上させる。
【解決手段】第１の調整砥石車９と第２の調整砥石車１０とを同軸に並列する。２個の調整砥石車それぞれに対向離間させてブレード４を配設して、第１の研削エリア１１と第２の研削エリア１２とを設定する。研削砥石車２は、研削砥石車Ｚスライド１３に搭載されて第１の研削エリア１１と第２の研削エリア１２との間を往復し、ワーク交換待ちのアイドルタイムがなく、高い実時間効率で研削操作を遂行する。
【選択図】図１An object of the present invention is to improve the centerless grinding technology, shorten the waiting time of grinding operation by a grinding wheel, and improve the actual grinding time efficiency.
A first adjusting grinding wheel 9 and a second adjusting grinding wheel 10 are arranged in parallel on the same axis. The first grinding area 11 and the second grinding area 12 are set by arranging the blade 4 so as to face and separate from each of the two adjusting grinding wheels. The grinding wheel 2 is mounted on the grinding wheel Z slide 13 and reciprocates between the first grinding area 11 and the second grinding area 12, and there is no idle time waiting for workpiece replacement, and high real-time efficiency. Perform the grinding operation.
[Selection] Figure 1
Description
本発明は、工作物を回転して研削する際にその回転中心を利用せずに、その外周面を回転支持しながら工作物を研削するセンタレス研削技術に係り、特に多数のワークを連続的に研削する場合、研削砥石車の作業待ち時間を短縮して実作業時間効率を向上させるように改良したインフィ−ド方式のセンタレス研削方法、及び、該方法を実施するに好適に改良したセンタレス研削装置に関するものである。 The present invention relates to a centerless grinding technique for grinding a workpiece while rotating and supporting the outer peripheral surface without using the center of rotation when the workpiece is rotated and ground. When grinding, an in-feed type centerless grinding method improved so as to shorten the work waiting time of the grinding wheel and improve the actual work time efficiency, and a centerless grinding device suitably improved to implement the method It is about.
センタレス研削装置は、研削対象の工作物（ワーク）を回転して研削する際に、この工作物の回転中心を利用せずに、固定された支持刃（ブレード）と回転する調整砥石車との間で工作物の外周面を回転支持し、この回転する工作物の外周面に、回転する研削砥石車を押し当てて研削するものである。そして、インフィ−ド方式のセンタレス研削装置は、調整砥石車の回転軸と研削砥石車の回転軸が平行に配置される構造となっている。
そのセンタレス研削装置の基本的構成を、図５及び図６に示す。
図５（Ａ）は、従来のセンタレス研削装置の正面外観を示し、センタレス研削装置は、ベッド２１の上に研削砥石車２２と調整砥石車２３とが搭載され、調整砥石車２３に対向離間してブレード２４が配置されている。研削されるワークは、回転する調整砥石車２３とブレード２４とに支持されつつ回転し、そのワークに回転する研削砥石車２２が接触して研削作業が行なわれる。そして、前記ベッド２１の上面に調整砥石スライド２５が設置され、この調整砥石スライド２５に調整砥石車２３及びブレード２４が搭載されている。
調整砥石車と研削砥石車とを結ぶ直線は水平をなし、これをＸ軸とする。ただし、ワークを安定させる等の目的によって図５（Ｂ）のように調整砥石スライド２５を傾斜させた公知例もあり、この場合Ｘ軸は、調整砥石車の回転軸に直交し、傾斜させた調整砥石スライドとほぼ平行をなす。
The centerless grinding device, when rotating and grinding a workpiece (workpiece) to be ground, does not use the center of rotation of the workpiece, and does not use the fixed support blade (blade) and the rotating adjustment grinding wheel. The outer peripheral surface of the workpiece is rotated and supported between them, and a rotating grinding wheel is pressed against the outer peripheral surface of the rotating workpiece to perform grinding. The in-feed type centerless grinding apparatus has a structure in which the rotating shaft of the adjusting grinding wheel and the rotating shaft of the grinding wheel are arranged in parallel.
The basic configuration of the centerless grinding apparatus is shown in FIGS.
FIG. 5A shows a front appearance of a conventional centerless grinding apparatus. The centerless grinding apparatus includes a grinding wheel 22 and an adjustment grinding wheel 23 mounted on a bed 21 and is opposed to and separated from the adjustment grinding wheel 23. The blade 24 is arranged. The workpiece to be ground rotates while being supported by the rotating adjustment grinding wheel 23 and the blade 24, and the grinding grinding wheel 22 that rotates rotates in contact with the workpiece. An adjustment grindstone slide 25 is installed on the upper surface of the bed 21, and an adjustment grindstone wheel 23 and a blade 24 are mounted on the adjustment grindstone slide 25.
The straight line connecting the adjustment grinding wheel and the grinding wheel is horizontal, and this is the X axis. However, there is a known example in which the adjusting grindstone slide 25 is tilted as shown in FIG. 5B for the purpose of stabilizing the workpiece. In this case, the X-axis is inclined perpendicular to the rotation axis of the adjusting grindstone. Almost parallel to the adjusting wheel slide.
図６は、図５（Ａ）に示すセンタレス研削装置の分解斜視図である。調整砥石スライド５はベッド２１の上に載置され、調整砥石スライド駆動機構２５ａにより研削砥石車２２に対し前進、後進駆動される。
尚、通常のセンタレス研削装置には、砥石台を垂直軸周りに回動させる垂直旋回盤が設けられたり、メンテナンスのために砥石台を移動させる手段が設けられたり、研削砥石車や調整砥石車の砥石部分を研ぐ（ドレッシング）ためのドレッサが併設されたりしているが、本発明と直接的な関係がないので図示を省略する。
FIG. 6 is an exploded perspective view of the centerless grinding apparatus shown in FIG. The adjusting grindstone slide 5 is placed on the bed 21 and driven forward and backward by the adjusting grindstone slide drive mechanism 25a with respect to the grinding wheel 22.
In addition, a normal centerless grinding apparatus is provided with a vertical swivel for rotating the grinding wheel head around the vertical axis, a means for moving the grinding wheel table for maintenance, a grinding wheel or an adjustment grinding wheel. Although a dresser for sharpening (dressing) the grindstone portion of this is also provided, the illustration is omitted because it is not directly related to the present invention.
図７は、従来のセンタレス研削装置における研削作業を示し、図７（Ａ）に示すごとく、１番目のワークＷａは調整砥石車２３とブレード２４とに支持されて、調整砥石車２３と逆方向に回転している。
調整砥石車２３とブレード２４とを搭載した調整砥石スライド２５は、調整砥石スライド駆動機構２５ａにより往復矢印ｆ−ｒ方向に駆動される。調整砥石スライド２５が前進（矢印ｆ）方向に移動して、ワークを研削砥石車２２に接触させ、さらに同方向に切込み送りする。この移動・接触・切込み送りは相対的なものであり、研削砥石車２２をスライドに搭載して矢印ｒ方向に移動・接触・切込み送りさせるものであってもよい。
FIG. 7 shows a grinding operation in a conventional centerless grinding apparatus. As shown in FIG. 7A, the first workpiece Wa is supported by the adjusting grinding wheel 23 and the blade 24 and is opposite to the adjusting grinding wheel 23. It is rotating.
The adjusting grindstone slide 25 on which the adjusting grindstone 23 and the blade 24 are mounted is driven in the reciprocating arrow fr direction by the adjusting grindstone slide drive mechanism 25a. The adjustment grindstone slide 25 moves in the forward direction (arrow f) to bring the workpiece into contact with the grinding wheel 22 and further cut and feed in the same direction. This movement / contact / cut feed may be relative, and the grinding wheel 22 may be mounted on a slide and moved / contact / cut feed in the direction of arrow r.
前記１番目のワークＷａの研削が終わると、図７（Ｂ）に示すごとく、調整砥石スライド２５を矢印ｒ方向に後退させ、ワークを搬出するアンローダ６を用いて研削済みの１番目のワークＷａを矢印ａのように搬出し、またワークを搬入するローダ７を用いて未研削の２番目のワークＷｂを矢印ｂのように搬入する。この工程における調整砥石車２３の後退も相対的なものであり、研削砥石車２２を後退させてもよい。
ここにワークについて、研削済みや未研削とは、この図に示されている研削砥石車２２による研削作業に関するものであって、図外の上流作業ステーションで粗研削されていても、この作業ステーションでは未研削であり、図外の下流作業ステーションで更に仕上げ研削されても、この作業ステーションでは研削済みである。
When the grinding of the first workpiece Wa is finished, as shown in FIG. 7B, the first workpiece Wa that has been ground by using the unloader 6 that moves the adjusting grindstone slide 25 in the direction of the arrow r and carries the workpiece out as shown in FIG. Is unloaded as shown by the arrow a, and the unground second work Wb is loaded as shown by the arrow b by using the loader 7 for loading the work. The backward movement of the adjusting grinding wheel 23 in this process is also relative, and the grinding grinding wheel 22 may be moved backward.
Here, with regard to the workpiece, ground and unground are related to the grinding work by the grinding wheel 22 shown in this figure, and this work station even if rough grinding is performed at the upstream work station outside the figure. Is unground, and even if it is further finish ground at a downstream work station (not shown), it is already ground at this work station.
そして、１番目のワークＷａを搬出（矢印ａ）し、２番目のワークＷｂを搬入（矢印ｂ）すると、図７（Ｃ）に示すごとく、２番目のワークＷｂの研削を開始する。以下、これらの工程を繰り返す。 When the first workpiece Wa is unloaded (arrow a) and the second workpiece Wb is loaded (arrow b), grinding of the second workpiece Wb is started as shown in FIG. 7C. Hereinafter, these steps are repeated.
図７に示す従来のインフィ−ド方式のセンタレス研削においては、図７（Ａ）で研削の実作業を行なった後、図７（Ｂ）でワ−クを交換する間、研削砥石車２２は待機している。その後、図７（Ｃ）で研削を再開するまで、待ち時間が生じる。その一例として、研削砥石車２２において、実研削時間が５秒で、待ち時間が３秒の場合の実作業の時間効率は５／（５＋３）＝６２．５％であるが、待ち時間を３秒から２秒に短縮すれば、実作業の時間効率は、５／（５＋２）＝７１．４％に向上する。 In the conventional in-feed type centerless grinding shown in FIG. 7, after performing the actual grinding work in FIG. 7 (A), the grinding wheel 22 is replaced while the workpiece is replaced in FIG. 7 (B). Waiting. Thereafter, a waiting time is generated until grinding is resumed in FIG. As an example, in the grinding wheel 22, when the actual grinding time is 5 seconds and the waiting time is 3 seconds, the time efficiency of actual work is 5 / (5 + 3) = 62.5%, but the waiting time is 3 If the time is reduced from 2 seconds to 2 seconds, the time efficiency of actual work is improved to 5 / (5 + 2) = 71.4%.
本発明は以上に述べた事情に鑑みて為されたものであって、その目的は、研削実作業の時間効率を格段に向上せしめ得るセンタレス研削方法、及び上記の方法を実施するに好適なセンタレス研削装置を提供することである。 The present invention has been made in view of the above-described circumstances, and an object thereof is a centerless grinding method capable of remarkably improving the time efficiency of actual grinding work, and a centerless suitable for implementing the above method. A grinding device is provided.
本発明の基本的な原理について、その１実施形態に対応する図１を参照して説明すると次の通りである。
第１の調整砥石車（９）と第２の調整砥石車（１０）とを同軸に並列させ、これらを調整砥石スライド（５）に搭載して矢印ｆ−ｒ方向に往復駆動する。
スルフィ−ド研削においては調整砥石車が垂直旋回盤に搭載され、一定の送り角が与えられるが、インフィ−ド研削における調整砥石車の回転軸は研削砥石車（２）の回転軸とほぼ平行に配置される。この回転軸方向をＺ軸とする、前記の矢印ｆ−ｒ方向はＺ軸に直角である。
The basic principle of the present invention will be described with reference to FIG. 1 corresponding to the first embodiment.
The first adjustment grinding wheel (9) and the second adjustment grinding wheel (10) are arranged coaxially in parallel, and these are mounted on the adjustment grinding wheel slide (5) and driven to reciprocate in the direction of the arrow fr.
In slewing grinding, an adjusting grinding wheel is mounted on a vertical turning machine, and a constant feed angle is given. However, the rotational axis of the adjusting grinding wheel in infeed grinding is almost parallel to the rotational axis of the grinding wheel (2). Placed in. The direction of the arrow fr is perpendicular to the Z axis, with this rotation axis direction as the Z axis.
前記調整砥石スライド（５）に２個のブレード（４）を搭載し、その片方を第１の調整砥石車（９）に対向離間させ、他方を第２の調整砥石車（１０）に対向離間させることにより、この２つの領域をワ−クを支持して研削可能な第１の研削エリア（１１）と第２の研削エリア（１２）に設定する。
一方、研削砥石車（２）を研削砥石車Ｚスライド（１３）に搭載してＺ軸方向に、矢印Ｌ−Ｒのごとく往復駆動可能にする。これにより、搭載された研削砥石車（２）が、第１の研削エリア（１１）に対向したり第２の研削エリア（１２）に対向したりする。従来、メンテナンス等のために研削砥石車を移動させる構造の前例はあるが、２個所の研削エリア間を往復させるという構成はなかった。
Two blades (4) are mounted on the adjusting grinding wheel slide (5), one of which is opposed to and separated from the first adjusting grinding wheel (9), and the other is opposed to and separated from the second adjusting grinding wheel (10). Thus, these two regions are set as a first grinding area (11) and a second grinding area (12) that can be ground while supporting the workpiece.
On the other hand, the grinding wheel (2) is mounted on the grinding wheel Z slide (13) so as to be reciprocally driven in the Z-axis direction as indicated by arrows LR. As a result, the mounted grinding wheel (2) faces the first grinding area (11) or faces the second grinding area (12). Conventionally, there is a precedent structure for moving a grinding wheel for maintenance or the like, but there has been no configuration for reciprocating between two grinding areas.
このように構成されたセンタレス研削装置によれば、図１のように研削砥石車（２）を矢印Ｒ方向に移動させて第２の調整砥石車（１０）に対向させ、第２の研削エリア（１２）においてワ−ク（図示省略）を研削している間に、第１の研削エリア（１１）においてワ−クの交換を行ない、第１の研削エリア（１１）のワーク交換が終わると研削砥石車（２）を矢印Ｌ方向に移動させて第１の調整砥石車（９）に対向させ、第１の研削エリア（１１）においてワ−ク（図示省略）を研削することができる。
このようにして、１個の研削砥石車（２）がＺ軸方向に移動するだけで、ワークの交換待ちアイドルタイムがなく、次のサイクルの実研削作業に進むことができる。
According to the centerless grinding apparatus configured as described above, the grinding wheel (2) is moved in the direction of the arrow R as shown in FIG. 1 so as to face the second adjustment grinding wheel (10). While the workpiece (not shown) is being ground in (12), the workpiece is exchanged in the first grinding area (11), and the workpiece exchange in the first grinding area (11) is completed. The grinding wheel (2) is moved in the direction of arrow L so as to face the first adjustment grinding wheel (9), and the workpiece (not shown) can be ground in the first grinding area (11).
In this way, only by moving one grinding wheel (2) in the Z-axis direction, there is no idle time waiting for workpiece replacement, and it is possible to proceed to the actual grinding operation of the next cycle.
前述の原理に基づいて本願発明のセンタレス研削方法は、調整砥石車とブレードとを対向離間させて支持するワークに研削砥石車を接触させて研削するセンタレス研削方法において、前記調整砥石車を、同軸で並列する第１調整砥石車と第２調整砥石車とから構成し、前記第１調整砥石車とブレードを対向離間させてワークを支持する第１研削エリアを設定するとともに、前記第２調整砥石車とブレードを対向離間させてワークを支持する第２研削エリアを設定し、前記研削砥石車が第１研削エリアに移動して前記第１調整砥石車とブレードとに支持されたワークと接触して研削し、かつ前記第２研削エリアから研削済みのワークを搬出して該第２研削エリアに未研削のワークを搬入する第１工程と、前記研削砥石車が第２研削エリアに移動して前記第２調整砥石車とブレードとに支持されたワークと接触して研削し、かつ前記第１研削エリアから研削済みのワークを搬出して該第１研削エリアに未研削のワークを搬入する第２工程と、を繰り返し実行することを特徴とする。 Based on the above principle, the centerless grinding method of the present invention is a centerless grinding method in which the grinding wheel is brought into contact with a workpiece that supports the grinding wheel and the blade that are opposed to and separated from each other, and the grinding wheel is coaxial. The first adjustment grinding wheel and the second adjustment grinding wheel that are arranged in parallel with each other, the first adjustment grinding wheel and the blade are separated from each other to set a first grinding area for supporting a workpiece, and the second adjustment grinding wheel A second grinding area for supporting the workpiece is set by separating the wheel and the blade from each other, and the grinding wheel moves to the first grinding area to come into contact with the workpiece supported by the first adjustment grinding wheel and the blade. The first step of carrying out the grinding and unloading the ground workpiece from the second grinding area and carrying the unground workpiece into the second grinding area, and the grinding wheel moving to the second grinding area Then, the workpiece is ground in contact with the workpiece supported by the second adjusting grinding wheel and the blade, and the ground workpiece is taken out from the first grinding area, and the unground workpiece is carried into the first grinding area. The second step is repeatedly executed.
また、本願発明のセンタレス研削方法は、前記第１調整砥石車と第２調整砥石車とを一体的に連設して、研削砥石の幅の２倍以上の砥石幅を有する幅広調整砥石車とすることを特徴とする。 In the centerless grinding method of the present invention, the first adjustment grinding wheel and the second adjustment grinding wheel are integrally connected to each other, and a wide adjustment grinding wheel having a grinding wheel width that is twice or more the width of the grinding wheel is provided. It is characterized by doing.
また、本願発明のセンタレス研削装置は、調整砥石車とブレードとを対向離間させて支持するワークに研削砥石車を接触させて研削するセンタレス研削装置において、前記調整砥石車を、同軸で並列する第１調整砥石車と第２調整砥石車とから構成し、前記第１調整砥石車にブレードを対向離間させて第１研削エリアを設定するとともに、前記第２調整砥石車にブレードを対向離間させて第２研削エリアを設定し、かつ、前記研削砥石車を搭載して研削砥石車の軸方向に往復移動する研削砥石車スライドを設けて、前記研削砥石車が第１研削エリアと第２研削エリアとの間を往復移動することを特徴とする。 Further, the centerless grinding apparatus of the present invention is a centerless grinding apparatus for grinding by bringing a grinding wheel into contact with a workpiece that supports the grinding wheel and the blade that are opposed to and spaced apart from each other. The first adjustment grinding wheel is composed of a first adjustment grinding wheel and a blade is opposed to and separated from the first adjustment grinding wheel to set a first grinding area, and the blade is opposed to and separated from the second adjustment grinding wheel. A second grinding area is set, and a grinding wheel slide is provided that reciprocates in the axial direction of the grinding wheel by mounting the grinding wheel, and the grinding wheel has a first grinding area and a second grinding area. It is characterized by reciprocating between.
また、本願発明のセンタレス研削装置は、前記第１調整砥石車と第２調整砥石車とを一体的に連設して、研削砥石の幅の２倍以上の砥石幅を有する幅広調整砥石車とすることを特徴とする。 Further, the centerless grinding apparatus of the present invention includes a wide adjustment grinding wheel having a grinding wheel width that is at least twice the width of the grinding wheel by integrally connecting the first adjustment grinding wheel and the second adjustment grinding wheel. It is characterized by doing.
また、本願発明のセンタレス研削装置は、前記第１調整砥石車と第２調整砥石車を搭載してその回転軸方向に移動する調整砥石車スライドを設けたことを特徴とする。 The centerless grinding apparatus according to the present invention is characterized in that an adjustment grinding wheel slide is provided which is mounted with the first adjustment grinding wheel and the second adjustment grinding wheel and moves in the rotation axis direction.
また、本願発明のセンタレス研削装置は、前記研削砥石車スライド若しくは調整砥石車スライドと連動させて、研削砥石車が近接していない方の研削エリアに対して未研削のワークを搬入する手段、及び研削済みワークを搬出する手段を備えることを特徴とする。 Further, the centerless grinding apparatus of the present invention is a means for bringing an unground workpiece into a grinding area where the grinding wheel is not in close proximity in conjunction with the grinding wheel slide or adjusting grinding wheel slide, and A means for carrying out the ground workpiece is provided.
本願発明のセンタレス研削方法によれば、１個の研削砥石車が２個所の研削エリアの間を往復するので、研削砥石車が位置していない方の研削エリアではワ−クを入れ替えて研削操作の準備を行ない、そして研削砥石車は準備を終えた研削エリアで研削操作を行なうことができる。これにより、研削砥石車は、ワ−クを入れ替え待ちのアイドルタイムを生じることなく、実研削作業の時間効率が高くなる。 According to the centerless grinding method of the present invention, since one grinding wheel reciprocates between two grinding areas, the grinding operation is performed by replacing the work in the grinding area where the grinding wheel is not located. And the grinding wheel can perform the grinding operation in the prepared grinding area. As a result, the grinding wheel improves the time efficiency of the actual grinding operation without causing idle time waiting for replacement of the workpiece.
また、本願発明のセンタレス研削装置によれば、研削砥石車を２個所の研削エリア間を往復させるスライド機構を設けることで、その効果を十分に発揮することができる。 Further, according to the centerless grinding apparatus of the present invention, the effect can be sufficiently exhibited by providing a slide mechanism for reciprocating the grinding wheel between two grinding areas.
また、本願発明のセンタレス研削装置によれば、研削作業に伴って、第１の研削エリア及び第２の研削エリアに対するワ−クの搬入と搬出が行なわれるので、多数のワ−クを連続して円滑に研削することができる。 Further, according to the centerless grinding apparatus of the present invention, since the work is carried into and out of the first grinding area and the second grinding area in accordance with the grinding work, a large number of works are continuously provided. And can be ground smoothly.
図１は、本発明に係るセンタレス研削装置の第１の実施例を示す模式的な平面図である。
センタレス研削装置は、その基台となるベッド１の上に研削砥石車Ｚスライド１３が設けられ、その上に研削砥石車２を搭載している。図１において、研削砥石車２の回転軸２ａと平行に座標軸Ｚを設定し、Ｘ軸はそのＺ軸と直交している。
研削砥石車Ｚスライド１３は、矢印Ｌ−ＲのごとくＺ軸方向に往復駆動される。また、前記ベッド１上に、調整砥石スライド５も設けられていて、Ｚ軸方向に並列し回転軸を共有する第１の調整砥石車９、及び第２の調整砥石車１０が配置される。
FIG. 1 is a schematic plan view showing a first embodiment of a centerless grinding apparatus according to the present invention.
In the centerless grinding apparatus, a grinding wheel Z slide 13 is provided on a bed 1 serving as a base, and the grinding wheel 2 is mounted thereon. In FIG. 1, a coordinate axis Z is set parallel to the rotation axis 2a of the grinding wheel 2 and the X axis is orthogonal to the Z axis.
The grinding wheel Z slide 13 is driven to reciprocate in the Z-axis direction as indicated by an arrow LR. An adjustment grinding wheel slide 5 is also provided on the bed 1, and a first adjustment grinding wheel 9 and a second adjustment grinding wheel 10 that are parallel to the Z-axis direction and share a rotation axis are disposed.
そして、前記第１の調整砥石車９とブレード４を対向離間させて、その領域にワーク（図示省略）を支持し、これに研削砥石車を接近させてワークを研削するものであり、この領域を第１の研削エリア１１とする。
同様に、第２の調整砥石車１０とブレード４を対向離間させて、その領域にワーク（図示省略）を支持し、これに研削砥石車を接近させてワークを研削するものであり、この領域を第２の研削エリア１２とする。この際、前記調整砥石スライド５は、矢印ｆ−ｒのようにＸ軸方向に往復駆動される。
Then, the first adjusting grinding wheel 9 and the blade 4 are opposed to and separated from each other, a work (not shown) is supported in the region, and the grinding wheel is brought close to this to grind the work. Is a first grinding area 11.
Similarly, the second adjusting grinding wheel 10 and the blade 4 are opposed to and separated from each other, and a workpiece (not shown) is supported in that region, and the grinding wheel is brought close to this to grind the workpiece. Is the second grinding area 12. At this time, the adjusting grindstone slide 5 is reciprocated in the X-axis direction as indicated by an arrow fr.
図１において、第２の研削エリア１２にワーク（図示省略）を供給して支持し、調整砥石スライド５を矢印ｆ方向に移動すると、ワークに対して研削砥石車２が相対的に接近し、該ワークに接触してセンタレス研削を行なう。また、研削砥石車Ｚスライド１３を矢印Ｌ方向に移動させて研削砥石車２を第１の研削エリア１１に対向させると、この第１の研削エリアにワーク（図示省略）を供給してセンタレス研削を行なうことができる。
このように、１個の研削砥石車を往復移動させることにより、２個所の研削エリアにおいて研削することが本実施形態の特徴である。
In FIG. 1, when a workpiece (not shown) is supplied and supported in the second grinding area 12 and the adjusting grinding wheel slide 5 is moved in the direction of the arrow f, the grinding wheel 2 approaches relatively to the workpiece, Centerless grinding is performed in contact with the workpiece. Further, when the grinding wheel Z slide 13 is moved in the direction of the arrow L and the grinding wheel 2 is opposed to the first grinding area 11, a workpiece (not shown) is supplied to the first grinding area to perform centerless grinding. Can be performed.
As described above, the present embodiment is characterized by grinding in two grinding areas by reciprocating one grinding wheel.
図２は、図１に示した実施形態によるセンタレス研削作業の説明図である。本発明方法は多数のワークを連続してセンタレス研削するものであって、以下の工程を繰り返す。
図２（Ａ）は第１の工程を示し、研削砥石車２が第１の研削エリア１１に対向している。図示しない１番目のワークが第１の研削エリア１１に予め搬入されていて、研削砥石車２が第１の研削エリア１１で１番目のワークの研削を行う。その間に、ローダ７によって２番目のワ−クＷｂを第２の研削エリア１２に搬入する（矢印ｂ）。
FIG. 2 is an explanatory diagram of the centerless grinding operation according to the embodiment shown in FIG. In the method of the present invention, a number of workpieces are continuously centerless ground, and the following steps are repeated.
FIG. 2A shows the first step, in which the grinding wheel 2 is opposed to the first grinding area 11. A first workpiece (not shown) is previously carried into the first grinding area 11, and the grinding wheel 2 performs grinding of the first workpiece in the first grinding area 11. Meanwhile, the loader 7 carries the second work Wb into the second grinding area 12 (arrow b).
図２（Ｂ）は第２の工程を示し、第２の研削エリア１２には、前工程で２番目のワ−クＷｂが搬入されているので、研削砥石車２はＺ軸の右方向に移動し、第２の研削エリア１２において２番目のワ−クＷｂ（この図では図示省略）を研削する。
研削砥石車２が第２の研削エリア１２で２番目のワ−クＷｂを研削している間に、前工程で研削を終えた１番目のワ−クＷａをアンローダ６で搬出する（矢印ａ）。そして、１番目のワ−クＷａが搬出された第１の研削エリア１１に、３番目のワ−クＷｃがローダ７によって搬入される。
この第２の工程において、１番目のワ−クＷａは研削を終えて搬出され、２番目のワ−クＷｂは第２の研削エリア１２で研削されていて、３番目のワ−クＷｃは第１の研削エリア１１に搬入される。
上述した搬出用のアンローダ６と搬入用のローダ７とは、別体の部材でも、また一つの部材に両方の役目を兼用させてもよい。
FIG. 2 (B) shows the second process. Since the second work Wb is carried into the second grinding area 12 in the previous process, the grinding wheel 2 is moved to the right of the Z axis. Move and grind the second workpiece Wb (not shown in this figure) in the second grinding area 12.
While the grinding wheel 2 is grinding the second workpiece Wb in the second grinding area 12, the first workpiece Wa that has been ground in the previous process is carried out by the unloader 6 (arrow a ). Then, the third work Wc is carried in by the loader 7 into the first grinding area 11 where the first work Wa has been carried out.
In the second step, the first work Wa is finished after being ground, and the second work Wb is ground in the second grinding area 12, and the third work Wc is It is carried into the first grinding area 11.
The unloader 6 for unloading and the loader 7 for unloading described above may be separate members, or a single member may serve both functions.
図２（Ｃ）は第３の工程を示し、研削砥石車２は図２（Ａ）の位置に復帰し、前工程で第１の研削エリア１１に搬入された３番目のワ−クＷｃを研削するとともに、第２の研削エリア１２において、研削を終えている２番目のワ−クＷｂをアンローダ６で搬出し、その替わりに４番目のワ−クＷｄをローダ７で搬入する。
このようにして、以降は上記第２の工程と、第３の工程を繰り返すことにより、複数のワークを連続して研削することができるものである。
FIG. 2 (C) shows the third step, and the grinding wheel 2 returns to the position shown in FIG. 2 (A), and the third work Wc carried into the first grinding area 11 in the previous step is shown. In addition to grinding, in the second grinding area 12, the second workpiece Wb that has been ground is carried out by the unloader 6, and instead, the fourth workpiece Wd is carried in by the loader 7.
Thus, after that, a plurality of workpieces can be ground continuously by repeating the second step and the third step.
図３は、本発明の第２の実施例を示し、第１の実施例におけるＺ軸方向に並列した２個の調整砥石車を一体的に連設し、研削砥石車２の幅の２倍以上の砥石幅を有する幅広調整砥石車１４とするものである。このような幅広調整砥石車１４とすることにより、研削エリアを左右２個所に設けることができる。尚、何れを第１の研削エリアとしてもよい。
この実施例において、研削砥石車２は矢印Ｌ−ＲのごとくＺ軸方向に往復駆動され、幅広調整砥石車１４を搭載した調整砥石車Ｚスライド１５は、矢印ｆ−ｒのごとくＸ軸方向に往復駆動する。
FIG. 3 shows a second embodiment of the present invention, in which two adjusting grinding wheels arranged in parallel in the Z-axis direction in the first embodiment are integrally connected, and are twice the width of the grinding wheel 2. The wide adjustment grinding wheel 14 having the above-described grinding wheel width is used. By setting it as such a wide adjustment grinding wheel 14, a grinding area can be provided in two places on right and left. In addition, any may be used as the first grinding area.
In this embodiment, the grinding wheel 2 is reciprocated in the Z-axis direction as indicated by the arrow LR, and the adjusting grinding wheel Z slide 15 equipped with the wide adjustment grinding wheel 14 is moved in the X-axis direction as indicated by the arrow fr. Reciprocating drive.
図４は、本発明の第３の実施例を示し、この実施例では上記第２の実施例と同様に幅広調整砥石車１４を設けているが、第２の実施例との差異は、この幅広調整砥石車１４を搭載した調整砥石車Ｚスライド１５が矢印Ｌ′−Ｒ′のごとくＺ軸方向に往復駆動されることである。
本実施形態では、センタレス研削の切り込み送りを行なわせるため、矢印ｆ′−ｒ′のごとくＸ軸方向に往復駆動する研削砥石車切込スライド１６を設けて、これに研削砥石車２を搭載している。このセンタレス研削の切込み送りのためには、調整砥石車を搭載したスライド、若しくは研削砥石車を搭載したスライドの、少なくとも何れかをＸ軸方向に往復駆動させるものである。
上述した砥石車スライドの駆動機構をどのように構成するかについて、設計的自由度はあるが、調整砥石車搭載スライド若しくは研削砥石車搭載スライドの、少なくとも何れか片方をＺ軸方向（研削砥石車の回転軸方向）に移動させて、研削砥石車を２箇所の研削エリア間を往復させることが本発明に必須の構成である。
FIG. 4 shows a third embodiment of the present invention. In this embodiment, a wide adjustment grinding wheel 14 is provided as in the second embodiment, but the difference from the second embodiment is that That is, the adjustment grinding wheel Z slide 15 on which the wide adjustment grinding wheel 14 is mounted is reciprocated in the Z-axis direction as indicated by arrows L′-R ′.
In the present embodiment, a grinding wheel cutting slide 16 that reciprocates in the X-axis direction as shown by an arrow f'-r 'is provided to mount the grinding wheel 2 for centerless grinding. ing. For the centerless grinding infeed, at least one of a slide equipped with an adjusting grinding wheel or a slide equipped with a grinding grinding wheel is driven to reciprocate in the X-axis direction.
Although there is a degree of design freedom as to how the driving mechanism of the grinding wheel slide described above is configured, at least one of the adjustment grinding wheel mounting slide or the grinding wheel mounting slide is set in the Z-axis direction (grinding wheel). It is an essential configuration for the present invention that the grinding wheel is moved back and forth between two grinding areas.
１…ベッド ２…研削砥石車 ２ａ…回転軸 ３…調整砥石車 ４…ブレード ５…調整砥石スライド ６…アンローダ ７…ローダ ９…第１の調整砥石車 １０…第２の調整砥石車 １１…第１の研削エリア １２…第２の研削エリア
１３…研削砥石車Ｚスライド １４…幅広調整砥石車 １５…調整砥石車Ｚスライド １６…研削砥石車切込スライド ２１…ベッド ２２…研削砥石車 ２３…調整砥石車 ２４…ブレード ２５…調整砥石スライド ２５ａ…調整砥石スライド駆動機構 Ｗａ…１番目のワ−ク Ｗｂ…２番目のワ−ク Ｗｃ…３番目のワ−ク Ｗｄ…４番目のワ−ク
DESCRIPTION OF SYMBOLS 1 ... Bed 2 ... Grinding wheel 2a ... Rotating shaft 3 ... Adjusting wheel 4 ... Blade 5 ... Adjusting wheel slide 6 ... Unloader 7 ... Loader 9 ... First adjusting wheel 10 ... Second adjusting wheel 11 ... First 1 grinding area 12 ... second grinding area 13 ... grinding wheel Z slide 14 ... wide adjustment grinding wheel 15 ... adjusting grinding wheel Z slide 16 ... grinding grinding wheel cutting slide 21 ... bed 22 ... grinding grinding wheel 23 ... adjustment Grinding wheel 24 ... Blade 25 ... Adjusting grindstone slide 25a ... Adjusting grindstone slide drive mechanism Wa ... First work Wb ... Second work Wc ... 3rd work Wd ... 4th work
Claims (6)
前記調整砥石車を、同軸で並列する第１調整砥石車と第２調整砥石車とから構成し、
前記第１調整砥石車とブレードを対向離間させてワークを支持する第１研削エリアを設定するとともに、前記第２調整砥石車とブレードを対向離間させてワークを支持する第２研削エリアを設定し、
前記研削砥石車が第１研削エリアに移動して前記第１調整砥石車とブレードとに支持されたワークと接触して研削し、かつ前記第２研削エリアから研削済みのワークを搬出して該第２研削エリアに未研削のワークを搬入する第１工程と、
前記研削砥石車が第２研削エリアに移動して前記第２調整砥石車とブレードとに支持されたワークと接触して研削し、かつ前記第１研削エリアから研削済みのワークを搬出して該第１研削エリアに未研削のワークを搬入する第２工程と、を繰り返し実行することを特徴とするセンタレス研削方法。 In the centerless grinding method in which the grinding wheel is brought into contact with the workpiece that supports the adjustment grinding wheel and the blade while being opposed to each other and is ground,
The adjusting wheel is composed of a first adjusting wheel and a second adjusting wheel that are coaxially arranged in parallel,
A first grinding area for supporting the workpiece by setting the first adjusting grinding wheel and the blade to face each other is set, and a second grinding area for supporting the workpiece by setting the second adjusting grinding wheel and the blade to face each other. ,
The grinding wheel moves to the first grinding area to contact and grind the workpiece supported by the first adjusting grinding wheel and the blade, and the ground workpiece is unloaded from the second grinding area. A first step of bringing an unground workpiece into the second grinding area;
The grinding wheel moves to a second grinding area to contact and grind the workpiece supported by the second adjustment grinding wheel and a blade, and the ground workpiece is unloaded from the first grinding area. A centerless grinding method comprising repeatedly performing a second step of bringing an unground workpiece into the first grinding area.
前記調整砥石車を、同軸で並列する第１調整砥石車と第２調整砥石車とから構成し、
前記第１調整砥石車にブレードを対向離間させて第１研削エリアを設定するとともに、前記第２調整砥石車にブレードを対向離間させて第２研削エリアを設定し、
かつ、前記研削砥石車を搭載して研削砥石車の回転軸方向に往復移動する研削砥石車スライドを設けて、前記研削砥石車が第１研削エリアと第２研削エリアとの間を往復移動することを特徴とするセンタレス研削装置。 In a centerless grinding apparatus for grinding by bringing a grinding wheel into contact with a work that supports an adjustment grinding wheel and a blade opposed to each other,
The adjusting wheel is composed of a first adjusting wheel and a second adjusting wheel that are coaxially arranged in parallel,
A first grinding area is set by causing the blade to face and separate from the first adjustment grinding wheel, and a second grinding area is set by making the blade face and separate from the second adjustment grinding wheel,
In addition, the grinding wheel is mounted so as to reciprocate in the direction of the rotation axis of the grinding wheel, and the grinding wheel reciprocates between the first grinding area and the second grinding area. A centerless grinding apparatus characterized by that.
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| JP2004050328A (en) * | 2002-07-18 | 2004-02-19 | Shigiya Machinery Works Ltd | Process for grinding tubular work through grinder and centerless core grinder |
| JP2008149389A (en) * | 2006-12-14 | 2008-07-03 | Micron Seimitsu Kk | Centerless grinding method and device |
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| JP2008149389A (en) * | 2006-12-14 | 2008-07-03 | Micron Seimitsu Kk | Centerless grinding method and device |
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