JP7240013B2 - Vertical grinder - Google Patents

Vertical grinder Download PDF

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JP7240013B2
JP7240013B2 JP2021045639A JP2021045639A JP7240013B2 JP 7240013 B2 JP7240013 B2 JP 7240013B2 JP 2021045639 A JP2021045639 A JP 2021045639A JP 2021045639 A JP2021045639 A JP 2021045639A JP 7240013 B2 JP7240013 B2 JP 7240013B2
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work
drive
shaft
vertical
work holding
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JP2022144572A (en
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貴博 中内
晃司 新谷
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Daisho Seiki Corp
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本発明は、立型研削盤に係り、特にインデックスタイプ立型片面平面研削盤に関する。 The present invention relates to a vertical grinder, and more particularly to an index type vertical single-sided surface grinder.

従来、立型研削盤として、ワークドライブ機構を有するインデックスタイプ立型片面平面研削盤が、公知である(特許文献1、及び、図6,図7参照)。
図6の一部断面要部正面図と、図7の平面図に示すように、従来のインデックスタイプ立型片面平面研削盤は、インデックステーブル51を備え、このインデックステーブル51は、鉛直状軸心52廻りに間欠的に回転駆動される。被研削用ワークWは回転軸体53の上面54に保持され、図6の下方図外に設けた電動モータによって、鉛直軸心L53廻りに、回転(自転)すると共に、上方から下降(矢印N参照)して接近する研削砥石55によって、ワーク上面が、研削加工される。
図7に於て、右側のワークWは、研削加工される研削位置に在ると共に、左側のワークWは、ワーク着脱位置に在る。
2. Description of the Related Art Conventionally, an index type vertical single-sided surface grinder having a work drive mechanism is known as a vertical grinder (see Patent Document 1 and FIGS. 6 and 7).
As shown in the partial cross-sectional front view of FIG. 6 and the plan view of FIG. 7, a conventional index type vertical single-sided surface grinder has an index table 51. The index table 51 has a vertical axis. It is intermittently driven to rotate around 52 . The workpiece W to be ground is held on the upper surface 54 of the rotating shaft body 53, and is rotated (rotated) around the vertical axis L 53 by an electric motor provided outside the bottom view of FIG. N), the upper surface of the workpiece is ground by the approaching grinding wheel 55 .
In FIG. 7, the work W on the right side is at the grinding position, and the work W on the left side is at the work loading/unloading position.

特開平4-46753号公報JP-A-4-46753

図6,図7に示すように、ワークWは、回転軸体53の軸心L53上に、単数個だけ保持した状態で、軸心L53廻りに回転しつつ、矢印N方向に下降してくる研削砥石55(の下面)によって、研削されるのであるが、ワークWが小さい場合には、円環状砥石55の幅W55が狭い(小さい)ものを、使用せねばならない。 As shown in FIGS. 6 and 7, a single workpiece W is held on the axis L 53 of the rotary shaft 53 and descends in the direction of arrow N while rotating about the axis L 53 . It is ground by (the lower surface of) the grinding wheel 55, and if the workpiece W is small, the ring-shaped grinding wheel 55 with a narrow (small) width W55 must be used.

即ち、図7に示した平面視に於て、ワークWの上面の(研削後の)平面度を向上させるためには、ワークWの外周線が、砥石55の内周56と外周57を抜ける必要がある。そのために、ワークWが小さい場合に、砥石55の幅W55も狭くせねばならない。 That is, in the plan view shown in FIG. 7, in order to improve the flatness of the upper surface of the work W (after grinding), the outer peripheral line of the work W must pass through the inner periphery 56 and the outer periphery 57 of the grindstone 55. There is a need. Therefore, when the workpiece W is small, the width W55 of the grindstone 55 must also be narrowed.

従って、従来の図6,図7に示した立型研削盤では、(i)ワークWの上面の平面度及び表面粗さを向上させることが難しいという問題、(ii)研削砥石55をワークサイズに合わせて頻繁に交換せねばならないという問題、があった。 Therefore, the conventional vertical grinder shown in FIGS. 6 and 7 has the following problems: (i) it is difficult to improve the flatness and surface roughness of the upper surface of the workpiece W; There was a problem that it had to be replaced frequently according to the

そこで、本発明は、このような問題点(i)(ii)を解決して、ワークの研削面の平面度及び表面粗さを向上すること、及び、研削砥石の交換頻度を低減して、全体の研削作業の効率を改善することを、目的とする。 Therefore, the present invention solves such problems (i) and (ii), improves the flatness and surface roughness of the grinding surface of the workpiece, and reduces the frequency of replacement of the grinding wheel, The aim is to improve the efficiency of the overall grinding operation.

そこで、本発明は、複数本の鉛直状のワークドライブ軸を備え、該各ワークドライブ軸上に鉛直状のワーク保持回転軸体を複数本ずつ配設し、該ワーク保持回転軸体は被研削用ワークが着脱自在に取着されるワーク保持部を上端に有し、ワークドライブ用駆動モータの回転を、上記ワークドライブ軸を介して上記ワーク保持回転軸体に伝達するワークドライブ回転伝達系に於て、遊星ギア機構が、設けられ、上記遊星ギア機構は、上記各ワーク保持回転軸体の下端部に固設された遊星ギアと、上記各ワークドライブ軸を包囲する円筒体と、上記各円筒体の内面に設けられた内歯車とを、備え、複数の上記遊星ギアを上記内歯車に噛合させることによって、上記ワーク保持回転軸体、自転及び公転の両運動を起こすように構成した。 Therefore, in the present invention, a plurality of vertical work drive shafts are provided, a plurality of vertical work holding rotary shafts are arranged on each of the work drive shafts, and the work holding rotary shafts are ground. A work drive rotation transmission system which has a work holding portion at the upper end to which a work for work is detachably attached, and which transmits the rotation of the work drive drive motor to the work holding rotary shaft through the work drive shaft. A planetary gear mechanism is provided, and the planetary gear mechanism includes a planetary gear fixed to the lower end of each work holding rotary shaft, a cylindrical body surrounding each work drive shaft, and each of the above and an internal gear provided on the inner surface of a cylindrical body, and by meshing a plurality of the planetary gears with the internal gear, the workpiece holding rotary shaft is configured to cause both rotation and revolution motions. .

また、複数本の鉛直状のワークドライブ軸を備え、該各ワークドライブ軸上に鉛直状のワーク保持回転軸体を複数本ずつ配設し、該ワーク保持回転軸体は被研削用ワークが着脱自在に取着されるワーク保持部を上端に有し、ワークドライブ用駆動モータの回転を、上記ワークドライブ軸を介して上記ワーク保持回転軸体に伝達するワークドライブ回転伝達系に於て、遊星ギア機構が、設けられ、上記遊星ギア機構は、上記各ワーク保持回転軸体の下端部に固設された遊星ギアと、上記各ワークドライブ軸を包囲する円筒体と、上記各円筒体の内面に設けられた内歯車とを、備え、複数の上記遊星ギアを上記内歯車に噛合させることによって、上記ワーク保持回転軸体、自転及び公転の両運動を起こすように構成した研削加工構造体を、複数個、インデックステーブル上に、周方向均等に配設し、 上記インデックステーブルを中心鉛直軸心廻りに回転させて、ワーク研削ステーションとワーク脱着ステーションとに、停止させるインデックス駆動手段を、具備する。 In addition, a plurality of vertical work drive shafts are provided, and a plurality of vertical work holding rotary shafts are arranged on each of the work drive shafts. In a work drive rotation transmission system having a freely attached work holding portion at its upper end and transmitting rotation of a drive motor for a work drive to the work holding rotary shaft through the work drive shaft, a planetary A gear mechanism is provided, and the planetary gear mechanism includes a planetary gear fixed to the lower end of each work holding rotary shaft, a cylinder surrounding each work drive shaft, and an inner surface of each cylinder. and an internal gear provided in a grinding structure configured to generate both rotation and revolution motions in the work holding rotary shaft by meshing a plurality of the planetary gears with the internal gear. are arranged on the index table evenly in the circumferential direction, and index driving means is provided for rotating the index table around the central vertical axis and stopping the workpiece grinding station and the workpiece loading/unloading station. do.

本発明によれば、研削砥石の幅の大きいものが適用可能となる。従って、1つの研削砥石によって、研削加工できるワークの種類が増加できる。言い換えれば、遊星運動を行うことによりワーク研削面が均等に砥石面に当たり、ワークWの上面(被研削面)の平面度が向上し、表面粗さも著しく改善される。また、研削砥石の交換頻度を低減可能である。 According to the present invention, a grinding wheel having a large width can be applied. Therefore, one grinding wheel can increase the types of workpieces that can be ground. In other words, the planetary motion causes the grinding surface of the workpiece to evenly contact the grindstone surface, thereby improving the flatness of the upper surface (surface to be ground) of the workpiece W and significantly improving the surface roughness. Also, the frequency of replacement of the grinding wheel can be reduced.

本発明の実施の一形態を示す一部断面正面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a partially cross-sectional front view which shows one embodiment of this invention. 要部拡大正面断面図である。Fig. 3 is an enlarged front cross-sectional view of a main part; 本発明の平面説明図である。It is a plane explanatory view of the present invention. 図1の(IV-IV)断面拡大図である。FIG. 2 is an enlarged sectional view taken along (IV-IV) in FIG. 1; ワークの形状の一具体例及び作動を説明した斜視図である。FIG. 4 is a perspective view explaining a specific example of the shape of a workpiece and its operation; 従来例を示す要部の一部断面正面図である。It is a partial cross-sectional front view of the principal part which shows a conventional example. 従来例の平面説明図である。It is a plane explanatory view of a conventional example.

以下、図示の実施の形態に基づき本発明を詳説する。
図1~図5に於て、Wは被研削用ワークであって、図例では、小さなギアーを例示する。1はワーク保持回転軸体であって、その上端に、ワークWが着脱自在に取着されるワーク保持部2を有する。図1~図4では、この鉛直状ワーク保持回転軸体1を4本配置した場合を、例示する。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on the illustrated embodiments.
In FIGS. 1 to 5, W denotes a work to be ground, and in the example shown, a small gear is exemplified. Reference numeral 1 denotes a work-holding rotary shaft having a work-holding portion 2 at its upper end to which a work W is detachably attached. FIGS. 1 to 4 illustrate a case in which four vertical work holding rotary shafts 1 are arranged.

3はワークドライブ軸であり、2本のワークドライブ軸3,3の各々に、4本のワーク保持回転軸体1が軸受8,8にて回転可能に枢着されている。
4はインデックステーブルであり、中心鉛直軸心L4 廻りに間欠的に回転するように設けられる。インデックステーブル4は、上記鉛直軸心L4 に沿って下方へ延伸状のテーブル軸部11を有し、軸受12,12を介して、固定円筒体13の内部に枢支されている。
Reference numeral 3 denotes a work drive shaft, and four work holding rotating shafts 1 are rotatably pivoted on two work drive shafts 3, 3 through bearings 8, 8, respectively.
An index table 4 is provided so as to rotate intermittently around a central vertical axis L4 . The index table 4 has a table shaft portion 11 extending downward along the vertical axis L4 , and is pivotally supported inside a fixed cylindrical body 13 via bearings 12,12.

14は研削盤ベースを示し、これに固定円筒体13が固着されている。また、鉛直軸心L4 廻りにインデックステーブル4のテーブル軸部11を、間欠的に回転駆動するためのインデックス駆動手段10が設けられている。
このインデックス駆動手段10は、インデックス駆動モータM4 と、上記テーブル軸部11の下端に固着された大ギアー15と、これに噛合する小ギアー16と、この小ギアー16の軸の下端に固着のプーリ17と、上記モータM4 の出力軸に固着の駆動プーリ18と、両プーリ17,18を連動させるように懸架されたベルト19等から、構成される。
14 designates the grinder base to which the stationary cylinder 13 is fixed. An index drive means 10 is provided for intermittently rotating the table shaft portion 11 of the index table 4 around the vertical axis L4.
The index drive means 10 comprises an index drive motor M4 , a large gear 15 fixed to the lower end of the table shaft portion 11, a small gear 16 meshing with this, and a small gear 16 fixed to the lower end of the shaft. It is composed of a pulley 17, a drive pulley 18 fixed to the output shaft of the motor M4 , and a belt 19 suspended so as to interlock the two pulleys 17 and 18, and the like.

また、M1 ,M2 は、ワークドライブ用駆動モータであって、一方のモータM1 はワーク研削側に対応し、他方のモータM2 はワーク脱着側に対応する。
そして、ワークドライブ用駆動モータM1 の回転を、前述の4本のワーク保持回転軸体1に伝達するワークドライブ回転伝達系R1 に於て、複数本(図例では4本)のワーク保持回転軸体1を、自転及び公転の両運動J,Kを起こす遊星ギア機構Gが、設けられている(図2及び図4参照)。
M 1 and M 2 are work drive motors, one motor M 1 corresponds to the work grinding side, and the other motor M 2 corresponds to the work detachment side.
In the work drive rotation transmission system R1 that transmits the rotation of the work drive motor M1 to the four work holding rotary shafts 1, a plurality of (four in the figure) work holding A planetary gear mechanism G is provided for causing both rotation and revolution movements J, K of the rotary shaft 1 (see FIGS. 2 and 4).

図1~図5に示す実施形態では、複数本(4本)の各ワーク保持回転軸体1の下端部に、遊星ギア20を固設する。さらに、インデックステーブル4の上面に固着された円筒体21の内周面21Aに所定肉厚の円環状内突条22を形成して、この内突条22の内周端縁に内歯車23を設ける。この内歯車23に、4個の遊星ギア20を噛合させることによって、遊星ギア20が、自転J及び公転Kの両運動───遊星運動───を起こす。このような遊星ギア機構Gによって、ワーク保持回転軸体1及び(その上に取着の)ワークWは、図5に示す如く、自転運動J及び公転運動Kを起こす。自転運動Jは軸心L1 廻りの回転運動であり、公転運動Kは軸心L3 廻りの回転運動である。 In the embodiment shown in FIGS. 1 to 5, a planetary gear 20 is fixed to the lower end of each of the plurality (four) of work holding rotary shafts 1. As shown in FIG. Further, an annular inner ridge 22 having a predetermined thickness is formed on the inner peripheral surface 21A of the cylindrical body 21 fixed to the upper surface of the index table 4, and an internal gear 23 is attached to the inner peripheral edge of the inner ridge 22. prepare. By meshing the four planetary gears 20 with the internal gear 23, the planetary gears 20 cause both motions of rotation J and revolution K—planetary motion. By such a planetary gear mechanism G, the work-holding rotary shaft 1 and the work W (attached thereon) cause rotation motion J and revolution motion K, as shown in FIG. Rotational motion J is rotational motion about axis L1 , and orbital motion K is rotational motion about axis L3 .

図1と図3に於て、25は上方から下降して、ワークWの上面に接近可能な研削砥石であり、平面視円環状で、その砥石幅W25は、複数個のワークWを同時に研削するために、従来の砥石幅W55(図7参照)よりも大きい。 In FIGS. 1 and 3, reference numeral 25 denotes a grinding wheel that can be lowered from above to approach the upper surface of the workpiece W. It has an annular shape in plan view, and its width W25 is such that it can simultaneously grind a plurality of workpieces W. For grinding purposes, it is larger than the conventional wheel width W 55 (see FIG. 7).

図3から判るように、砥石25の内周・外周をワークWは自転Jと公転Kを行いつつ、通過する。
従って、砥石25の研削面が不均等磨耗せずに済み、これに伴って、ワークWの被研削仕上面の平面度,表面粗さ等の品質が優秀なものとなる。
As can be seen from FIG. 3, the work W passes through the inner and outer circumferences of the grindstone 25 while rotating J and revolving K. As shown in FIG.
Therefore, uneven wear of the grinding surface of the grindstone 25 can be avoided, and the quality of the finished surface of the workpiece W to be ground, such as flatness and surface roughness, is excellent.

本発明は、上述したような研削加工構造体Yをインデックステーブル4上に2個(複数個)均等に───図例では180°をもって───配設した構成であると言い換えることもできる。 The present invention can be rephrased as a configuration in which two (a plurality of) grinding structures Y as described above are evenly arranged on the index table 4——in the example shown, 180° apart——. .

即ち、本発明は、被研削用ワークWが着脱自在に取着されるワーク保持部2を上端に有する鉛直状のワーク保持回転軸体1を、ワークドライブ軸3上に複数本具備し、ワークドライブ用駆動モータM1 の回転を、ワーク保持回転軸体1に伝達するワークドライブ回転伝達系R1 に於て、複数本のワーク保持回転軸体1を、自転及び公転の両運動J,Kを起こす遊星ギア機構Gを、具備する研削加工構造体Yを、複数個、インデックステーブル4上に、周方向均等に配設し、インデックステーブル4を中心鉛直軸心L4 廻りに回転させて、ワーク研削ステーションS1 とワーク脱着ステーションS2 とに、停止させるインデックス駆動手段10を、具備する。 That is, according to the present invention, a plurality of vertical work holding rotary shafts 1 having work holding portions 2 at their upper ends to which works W to be ground are detachably attached are provided on a work drive shaft 3, and the work is In the work drive rotation transmission system R1 that transmits the rotation of the drive motor M1 to the work holding rotary shaft 1, a plurality of work holding rotary shafts 1 are subjected to both rotation and revolution motions J and K. A plurality of grinding structures Y, each having a planetary gear mechanism G that causes The workpiece grinding station S1 and the workpiece loading/unloading station S2 are provided with index driving means 10 for stopping.

なお、被研削用ワークWが、回転軸体1のワーク保持部2と一体に自転Jするように拘束するための拘束保持手段を、ワーク保持部2の上面に備える。
例えば、ワークが平面視円形以外の異形───例えば四角や六角等の多角形、楕円形、図5に示した歯形状等───であれば、その異形のワーク輪郭よりも僅かに大き目の凹窪部、又は、その異形のワーク輪郭の一部に係止する1本又は複数本の係止ピン等を、ワーク保持部2の上面に設けて、拘束保持手段とする。
A restraint holding means for restraining the workpiece W to be ground so that it rotates J integrally with the workpiece holding portion 2 of the rotary shaft 1 is provided on the upper surface of the workpiece holding portion 2 .
For example, if the workpiece has an irregular shape other than a circular shape in plan view---for example, a polygonal shape such as a square or a hexagon, an elliptical shape, or a tooth shape shown in FIG. or one or a plurality of locking pins or the like to be locked to a part of the contour of the deformed work are provided on the upper surface of the work holding portion 2 to serve as restraint holding means.

なお、図示の実施形態では、各ワークドライブ軸3に、4本のワーク保持回転軸体1及び4個のワークWが設けられる場合を例示したが、これを2本(2個)や3本(3個)とすることも可能であり、更に、5本(5個)や6本(6個)とすることも自由である。 In the illustrated embodiment, each work drive shaft 3 is provided with four work holding rotary shafts 1 and four works W, but these may be two (two) or three. (3 pieces) is also possible, and it is also possible to freely set it to be five (five pieces) or six (six pieces).

本発明は、以上詳述したように、被研削用ワークWが着脱自在に取着されるワーク保持部2を上端に有する鉛直状のワーク保持回転軸体1を、ワークドライブ軸3上に複数本具備し、ワークドライブ用駆動モータM1 の回転を、上記ワーク保持回転軸体1に伝達するワークドライブ回転伝達系R1 に於て、複数本の上記ワーク保持回転軸体1を、自転及び公転の両運動を起こす遊星ギア機構Gが、設けられている構成であるので、ワークWの上面の平面度及び表面粗さが著しく改善できる。しかも、複数個のワークWを同時かつ均等に加工され、研削作業能率も改善できる。また、砥石25の交換頻度を減少できる。 As described in detail above, the present invention provides a work drive shaft 3 with a plurality of vertical work holding rotary shafts 1 each having a work holding portion 2 at its upper end to which a work W to be ground is detachably attached. A plurality of work holding rotary shafts 1 are rotated and Since the planetary gear mechanism G that causes both revolution and revolution is provided, the flatness and surface roughness of the upper surface of the workpiece W can be significantly improved. Moreover, a plurality of works W can be machined simultaneously and evenly, and the efficiency of the grinding work can be improved. Also, the frequency of replacement of the grindstone 25 can be reduced.

また、被研削用ワークWが着脱自在に取着されるワーク保持部2を上端に有する鉛直状のワーク保持回転軸体1を、ワークドライブ軸3上に複数本具備し、ワークドライブ用駆動モータM1 の回転を、上記ワーク保持回転軸体1に伝達するワークドライブ回転伝達系R1 に於て、複数本の上記ワーク保持回転軸体1を、自転及び公転の両運動J,Kを起こす遊星ギア機構Gを、具備する研削加工構造体Yを、複数個、インデックステーブル4上に、周方向均等に配設し、上記インデックステーブル4を中心鉛直軸心L4 廻りに回転させて、ワーク研削ステーションS1 とワーク脱着ステーションS2 とに、停止させるインデックス駆動手段10を、具備する構成であるので、ワーク研削ステーションS1 にて研削加工作業中に、別の場所───ワーク脱着ステーションS2 ───において、研削後のワークWの取出し、及び、新しいワークWの取着を、行うことが可能であり、一層、作業能率が改善される。しかも、研削加工構造体Yに於ての研削加工は、ワーク平面度が高いと共に、表面粗さが優れている。かつ、研削作業能率も改善できる。 A work drive shaft 3 is provided with a plurality of vertical work holding rotating shafts 1 each having a work holding portion 2 at its upper end to which a work W to be ground is detachably attached. In the work drive rotation transmission system R1 that transmits the rotation of M1 to the work holding rotary shaft 1, both rotation and revolution motions J and K are caused in the plurality of work holding rotary shafts 1. A plurality of grinding structures Y each having a planetary gear mechanism G are equally arranged on an index table 4 in the circumferential direction. Since the grinding station S1 and the workpiece loading/unloading station S2 are provided with the index driving means 10 for stopping, the grinding operation at the workpiece grinding station S1 can be performed at another place ---- the workpiece loading/unloading station. In S 2 ────, it is possible to take out the workpiece W after grinding and attach a new workpiece W, further improving the working efficiency. Moreover, the grinding process in the grinding structure Y has high work flatness and excellent surface roughness. Moreover, grinding work efficiency can also be improved.

1 ワーク保持回転軸体
2 ワーク保持部
3 ワークドライブ軸
4 インデックステーブル
10 インデックス駆動手段
20 遊星ギア
21 円筒体
23 内歯車
W 被研削用ワーク
4 中心鉛直軸心
1 ワークドライブ用駆動モータ
1 ワークドライブ回転伝達系
G 遊星ギア機構
Y 研削加工構造体
1 ワーク研削ステーション
2 ワーク脱着ステーション
J 自転運動
K 公転運動
REFERENCE SIGNS LIST 1 work holding rotating shaft 2 work holding unit 3 work drive shaft 4 index table
10 index drive means
20 planetary gear
21 Cylinder
23 internal gear
W work to be ground L 4 center vertical axis M 1 drive motor for work drive R 1 work drive rotation transmission system G planetary gear mechanism Y grinding structure S 1 work grinding station S 2 work desorption station J rotation motion K revolution motion

Claims (2)

複数本の鉛直状のワークドライブ軸(3)を備え、該各ワークドライブ軸(3)上に鉛直状のワーク保持回転軸体(1)を複数本ずつ配設し、該ワーク保持回転軸体(1)は被研削用ワーク(W)が着脱自在に取着されるワーク保持部(2)を上端に有し、
ワークドライブ用駆動モータ(M1 )の回転を、上記ワークドライブ軸(3)を介して上記ワーク保持回転軸体(1)に伝達するワークドライブ回転伝達系(R1 )に於て、遊星ギア機構(G)が、設けられ、
上記遊星ギア機構(G)は、上記各ワーク保持回転軸体(1)の下端部に固設された遊星ギア(20)と、上記各ワークドライブ軸(3)を包囲する円筒体(21)と、上記各円筒体(21)の内面に設けられた内歯車(23)とを、備え、複数の上記遊星ギア(20)を上記内歯車(23)に噛合させることによって、上記ワーク保持回転軸体(1)、自転及び公転の両運動(J)(K)を起こすように構成したことを特徴とする立型研削盤。
A plurality of vertical work drive shafts (3) are provided, and a plurality of vertical work holding rotary shafts (1) are arranged on each of the work drive shafts (3), and the work holding rotary shafts (1) are provided. (1) has a work holding portion (2) at the upper end to which a work to be ground (W) is detachably attached,
In a work drive rotation transmission system (R 1 ) for transmitting the rotation of a work drive drive motor (M 1 ) to the work holding rotary shaft ( 1 ) through the work drive shaft ( 3 ) , a planetary gear A mechanism (G) is provided,
The planetary gear mechanism (G) includes a planetary gear (20) fixed to the lower end of each work holding rotary shaft (1) and a cylindrical body (21) surrounding each work drive shaft (3). and an internal gear (23) provided on the inner surface of each cylindrical body (21). A vertical grinder characterized in that it is constructed so that both rotation and revolution movements (J) and (K) are caused in a shaft body (1).
複数本の鉛直状のワークドライブ軸(3)を備え、該各ワークドライブ軸(3)上に鉛直状のワーク保持回転軸体(1)を複数本ずつ配設し、該ワーク保持回転軸体(1)は被研削用ワーク(W)が着脱自在に取着されるワーク保持部(2)を上端に有し、
ワークドライブ用駆動モータ(M1 )の回転を、上記ワークドライブ軸(3)を介して上記ワーク保持回転軸体(1)に伝達するワークドライブ回転伝達系(R1 )に於て、遊星ギア機構(G)が、設けられ、
上記遊星ギア機構(G)は、上記各ワーク保持回転軸体(1)の下端部に固設された遊星ギア(20)と、上記各ワークドライブ軸(3)を包囲する円筒体(21)と、上記各円筒体(21)の内面に設けられた内歯車(23)とを、備え、複数の上記遊星ギア(20)を上記内歯車(23)に噛合させることによって、上記ワーク保持回転軸体(1)、自転及び公転の両運動(J)(K)を起こすように構成した研削加工構造体(Y)を、複数個、インデックステーブル(4)上に、周方向均等に配設し、
上記インデックステーブル(4)を中心鉛直軸心(L4 )廻りに回転させて、ワーク研削ステーション(S1 )とワーク脱着ステーション(S2 )とに、停止させるインデックス駆動手段(10)を、具備することを特徴とする立型研削盤。
A plurality of vertical work drive shafts (3) are provided, and a plurality of vertical work holding rotary shafts (1) are arranged on each of the work drive shafts (3), and the work holding rotary shafts (1) are provided. (1) has a work holding portion (2) at the upper end to which a work to be ground (W) is detachably attached,
In a work drive rotation transmission system (R 1 ) for transmitting the rotation of a work drive drive motor (M 1 ) to the work holding rotary shaft ( 1 ) through the work drive shaft ( 3 ) , a planetary gear A mechanism (G) is provided,
The planetary gear mechanism (G) includes a planetary gear (20) fixed to the lower end of each work holding rotary shaft (1) and a cylindrical body (21) surrounding each work drive shaft (3). and an internal gear (23) provided on the inner surface of each cylindrical body (21). A plurality of grinding structures (Y) configured to cause both rotation and revolution motions (J) and (K) on the shaft (1) are arranged evenly on the index table (4) in the circumferential direction. set up,
An index drive means (10) for rotating the index table (4) around the center vertical axis ( L4 ) and stopping the workpiece grinding station ( S1 ) and the workpiece loading/unloading station ( S2 ) is provided. A vertical grinder characterized by:
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