JP3539140B2 - Machine tool table feeder - Google Patents

Machine tool table feeder Download PDF

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Publication number
JP3539140B2
JP3539140B2 JP18781297A JP18781297A JP3539140B2 JP 3539140 B2 JP3539140 B2 JP 3539140B2 JP 18781297 A JP18781297 A JP 18781297A JP 18781297 A JP18781297 A JP 18781297A JP 3539140 B2 JP3539140 B2 JP 3539140B2
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Prior art keywords
armature
winding
machine tool
armature core
stator
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JP18781297A
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JPH1118407A (en
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恭祐 宮本
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Yaskawa Electric Corp
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Yaskawa Electric Corp
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【発明の属する技術分野】
本発明は、工作機械のテーブルの送り装置に関するものである。
【０００２】
【従来の技術】
従来の工作機械のテーブルの送り装置は、図７に示すように構成している。
図において、２０はＵ字状に構成した工作機械のベッドで、このベッド２０の脚部２１の先端にリニアガイド２２を設けている。２３はテーブルで、このテーブル２３の側部を前記リニアガイド２２に載置してテーブル２３を軸線方向に移動できるようにしている。前記テーブル２３の下面には前記ベッド２０の脚部２１の垂直な垂直面２３ａを設けている。２４は前記ベッド２０の脚部２１の垂直面に取付けた固定子、２５は前記ベッド２０の脚部２１の固定子２４に対向するテーブル２３の垂下面２３ａに取付けた電機子である。
つぎに、テーブル送り装置の動作について説明をする。
前記電機子２５を励磁すると、テーブル２３に取り付けた電機子２５とベッド２０に取付けた固定子２４との電磁作用によりベッド２０のリニアガイド２２に支持されたテーブル２３を軸線方向に移動し、このテーブル２３取付けた被加工物を移動させて図示しない工作機械の刃物で被加工物を切削するものである。
【発明が解決しようとする課題】
ところが、従来の工作機械のテーブルの送り装置は、電機子２５からの損失熱がテーブル２３に伝導し、テーブル２３が熱により膨張し、テーブル２３上面の平面度が阻害される。このため、工作機械で加工された被加工物の加工面の精度が悪くなっていた。
本発明は、電機子からの損失熱を冷却してテーブルが熱により膨張しないようにして被加工物の加工精度を上げることを目的とする。
【０００４】
【課題を解決するための手段】
上記問題点を解決するために、本発明は、工作機械のベッドに取付けた永久磁石よりなる固定子と、該固定子に対向して取付けられた電機子を有するテーブルとを備え、該テーブルを直線方向に駆動する工作機械のテーブル送り装置において、前記電機子は、前記テーブルの下面に、長方形に打ち抜き両側に巻線収納溝を、中央に係合部である凸部、凹部を有する電機子鉄板を積層した電機子鉄心と、前記電機子鉄心の巻線収納溝に整列巻きして収納した巻線とを備えると共に、前記巻線を巻装した電機子鉄心の係合部を係合して構成しており、前記巻線の外周に充填した絶縁樹脂および前記電機子鉄心の外周に非磁性体の覆板が取付けられ、前記絶縁樹脂および前記電機子鉄心の外周と前期覆板との間に冷媒を充填した冷媒導管を設けてある。
また、本発明は、工作機械のベッドに取付けた永久磁石よりなる固定子と、該固定子に対向して取付けられた電機子を有するテーブルとを備え、該テーブルを直線方向に駆動する工作機械のテーブル送り装置において、前記電機子は、前記テーブルの下面に、長方形に打ち抜き両側に巻線収納溝を、中央に係合部である凸部、凹部を有する電機子鉄板を積層した電機子鉄心と、前記電機子鉄心の巻線収納溝に整列巻きして収納した巻線とを備えると共に、前記巻線を巻装した電機子鉄心の係合部を係合して構成しており、前記電機子鉄心および電機子鉄心に巻装した巻線を囲うキャンが設けられ、このキャンの外周に非磁性体の覆板が取付けられ、この覆板をキャンに接合して覆板とキャンとにより形成した複数の冷媒導管を設けてある。
【０００５】
【発明の実施の形態】
以下、本発明を図に示す実施例に基づいて説明する。
図１は本発明の第１の実施例を示す工作機械の概略構成図である。図２は本発明の第１実施例を示す工作機械の要部の平面図である。図３は図２のＡ−Ａ線に沿う断面図てある。
図において、１はＵ字状に構成した工作機械のベッドで、このベッド１の脚部２の先端にリニアガイド３を取付けている。前記ベッド１の脚部２の垂直な垂直面に固定子４を取付けている。前記固定子４は図２で示すようにベッド１の脚部２の内側に永久磁石を取付けて構成している。前記永久磁石は対向するものとは異極に配置し、隣のものとは異極になるように配置している。５は被加工物を載置して往復動するテーブルである。前記テーブル５の下面に前記ベッド１の垂直面２ａに取付けた固定子４に対向する電機子６を取付けている。前記電機子６は、図２に示すように薄鉄板より長方形の長手方向の両側に巻線収納溝７ａを有し、長方形の中央部の一方側側面に凸部７ｂを他方側側面に凹部７ｃを有する電機子鉄板を打ち抜き、この電機子鉄板を積層して電機子鉄心７を構成している。前記電機子鉄心７の巻線収納溝７ａに電線を整列巻きした巻線８を収納している。このように構成した電機子鉄心７を、電機子鉄心７に巻線８を巻装した歯部を、前記ベッド１の固定子４に対向させて並べ、電機子鉄心７の凸部７ｂを電機子鉄心７の凹部７ｃに嵌め込んで電機子６を構成する。９は側板で、前記電機子６の端部に固定している。１０は前記電機子６の外周に空隙を介して非磁性材の覆板１０ａで覆い、前記電機子６と覆板１０ａとの間に形成した冷媒導管で、この冷媒導管１０内に冷媒が充填してある。１１、１２は前記側板９に設けた冷媒注入口および冷媒排出口で、冷媒注入口１１から注入した冷媒を電機子鉄心７の外周と覆板１０ａとの間に形成した冷媒導管１０内を流通して冷媒排出口１２より外部に排出するように構成している。１３は巻線８の外周に充填した絶縁樹脂である。１４は押さえ板である。
つぎに、工作機械のテーブル送り装置の動作について説明をする。
電機子６の巻線８に通電すると、固定子４の永久磁石の磁束との電磁作用によりテーブル５を軸線方向に作動する。前記巻線８に流れる電流により巻線８に損失熱が発生する。この損失熱は、側板９に設けた冷媒注入口１１より注入した冷媒がテーブル５の移動に伴って揺動されながら冷媒導管１０内を流通して電機子鉄心７を冷却する。したがって、電機子鉄心７からの損失熱がテーブル５に伝導しない。
図４は本発明の第２の実施例を示す図２のＡ−Ａ線に沿う断面図で、電機子６の外側に断面が細長状の筒体よりなる冷媒導管１５を設け、端部を前記側板９冷媒注入口１１および冷媒排出口１２に接続する。したがって、この冷媒導管１５内を流れる冷媒がテーブル５の移動に伴って揺動されながら流通して電機子鉄心７を冷却する。したがって、電機子鉄心７からの損失熱がテーブル５に伝導しない。
図５は本発明の第３の実施例を示す工作機械の概略構成図である。図６は要部を拡大し要部側断面図である。
１６は永久磁石よりなる固定子で、ベッド１の底面に配置している。１７は巻線１８を有する電機子で、前記電機子１７の歯部を前記固定子１６に対向するようにテーブル５に取付けている。１９は非磁性材よりなるキャンで、前記巻線１８の外周に絶縁樹脂２０を充填し、その絶縁樹脂２０を囲ってテーブル５の固定部に取付けている。２１は冷媒導管で、前記キャン１９に空隙を介して覆板２１ａを取付け、前記覆板２１ａの適宜の箇所をスポットウエルドで前記キャン１９に接合して構成し、この冷媒導管２１内を複数の通路に区切り、冷媒を装填している。したがって、複数に区切られた冷媒導管２１内を冷媒が流通して電機子１７を冷却し、テーブル５に損失熱を伝導しない。
【０００６】
【発明の効果】
以上述べたように、本発明によればテーブル５に設けた電機子６を冷媒がテーブルの移動によって動かされながら流通して冷却するので、テーブルへの熱伝導がなくテーブルの熱歪みが生じることがなく、加工精度を損なうことがない。
【図面の簡単な説明】
【図１】本発明の第１の実施例を示す工作機械の概略構成図である。
【図２】本発明の第１の実施例を示す工作機械の要部の平面図である。
【図３】図２のＡ−Ａ線に沿う断面図である。
【図４】本発明の第２の実施例を示す図２のＡ−Ａ線に沿う断面である。
【図５】本発明の第３の実施例を示す工作機械の概略構成図である。
【図６】本発明の第３の実施例を示す工作機械の要部側断面図である。
【図７】従来の工作機械の概略構成図である。
【符号の説明】
１ ベッド、 ２ 脚部、 ３ リニアガイド、 ４ 固定子、
５テーブル、 ６ 電機子、 ７ 電機子鉄心、 ７ａ 巻線収納溝、
７ｂ 凸部、 ７ｃ 凹部、 ８巻線、 ９ 側板、 １０ 冷媒導管、
１０ａ 覆板、 １１ 冷媒注入口、 １２ 冷媒排出口、
１３ 絶縁樹脂、 １４ 押さえ板、 １５ 冷媒導管、 １６ 固定子、
１７ 電機子、 １８ 巻線、 １９ キャン、 ２０ 絶縁樹脂、
２１ 冷媒導管、 ２１ａ 覆板TECHNICAL FIELD OF THE INVENTION
The present invention relates to a table feed device for a machine tool.
[0002]
[Prior art]
A table feed device of a conventional machine tool is configured as shown in FIG.
In the figure, reference numeral 20 denotes a bed of a machine tool configured in a U-shape, and a linear guide 22 is provided at the tip of a leg 21 of the bed 20. Reference numeral 23 denotes a table. The side of the table 23 is placed on the linear guide 22 so that the table 23 can be moved in the axial direction. The lower surface of the table 23 is provided with a vertical surface 23 a perpendicular to the leg 21 of the bed 20. Reference numeral 24 denotes a stator mounted on the vertical surface of the leg 21 of the bed 20, and reference numeral 25 denotes an armature mounted on a hanging surface 23a of the table 23 facing the stator 24 of the leg 21 of the bed 20.
Next, the operation of the table feeding device will be described.
When the armature 25 is excited, the table 23 supported by the linear guide 22 of the bed 20 is moved in the axial direction by the electromagnetic action of the armature 25 attached to the table 23 and the stator 24 attached to the bed 20, and The workpiece mounted on the table 23 is moved, and the workpiece is cut by a blade of a machine tool (not shown).
[Problems to be solved by the invention]
However, in the conventional table feed device of a machine tool, heat loss from the armature 25 is transmitted to the table 23, the table 23 expands due to the heat, and the flatness of the upper surface of the table 23 is impaired. For this reason, the precision of the machined surface of the workpiece machined by the machine tool has deteriorated.
An object of the present invention is to increase the processing accuracy of a workpiece by cooling heat loss from an armature so that a table does not expand due to heat.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes a stator having a permanent magnet mounted on a bed of a machine tool , and a table having an armature mounted opposite to the stator. In the table feeder for a machine tool driven in a linear direction, the armature has a winding receiving groove on both sides punched in a rectangular shape on a lower surface of the table, and a convex portion and a concave portion which are engaging portions in the center. an armature core formed by laminating the iron plates, with and a winding wound to housing aligned winding receiving groove of the armature core, and engaging the engaging portion of the armature iron core wound the winding constitutes Te, the cover plate of non-magnetic material is attached to the outer periphery of the winding on the outer periphery of the filled insulating resin and said armature core, wherein the outer and year cover plate of insulating resin and said armature core A refrigerant conduit filled with refrigerant is provided between .
According to another aspect of the present invention, there is provided a machine tool including: a stator made of a permanent magnet mounted on a bed of a machine tool; and a table having an armature mounted opposite to the stator, and driving the table in a linear direction. In the table feeder, the armature is formed by laminating an armature iron plate having a winding receiving groove on both sides punched in a rectangular shape on the lower surface of the table and a convex portion and a concave portion serving as an engaging portion in the center. And windings arranged and housed in the winding accommodating groove of the armature core, and the engaging portion of the armature core wound with the winding is engaged, and An armature core and a can surrounding the winding wound on the armature core are provided, and a nonmagnetic cover plate is attached to an outer periphery of the can, and the cover plate is joined to the can to form a cover and a can. A plurality of formed refrigerant conduits are provided.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on an embodiment shown in the drawings.
FIG. 1 is a schematic configuration diagram of a machine tool showing a first embodiment of the present invention. FIG. 2 is a plan view of a main part of a machine tool showing a first embodiment of the present invention. FIG. 3 is a sectional view taken along line AA of FIG.
In the figure, reference numeral 1 denotes a bed of a machine tool configured in a U-shape, and a linear guide 3 is attached to a tip of a leg 2 of the bed 1. The stator 4 is attached to a vertical surface of the leg 2 of the bed 1. As shown in FIG. 2, the stator 4 is constructed by attaching a permanent magnet to the inside of the leg 2 of the bed 1. The permanent magnet is arranged with a different polarity from the facing magnet, and is arranged with a different polarity from the adjacent magnet. Reference numeral 5 denotes a table on which a workpiece is placed and reciprocates. An armature 6 facing the stator 4 attached to the vertical surface 2a of the bed 1 is attached to the lower surface of the table 5. As shown in FIG. 2, the armature 6 has winding accommodating grooves 7a on both sides in the longitudinal direction of a rectangular shape from a thin iron plate, and has a convex portion 7b on one side surface of a rectangular central portion and a concave portion 7c on the other side surface. The armature iron plate 7 is punched, and the armature iron plates are laminated to form the armature iron core 7. The winding 8 in which the electric wires are aligned and wound is housed in the winding housing groove 7 a of the armature core 7. The armature core 7 thus configured is arranged such that the teeth of the armature core 7 on which the windings 8 are wound are opposed to the stator 4 of the bed 1, and the protrusions 7b of the armature core 7 are The armature 6 is configured by being fitted into the concave portion 7c of the child core 7. Reference numeral 9 denotes a side plate fixed to an end of the armature 6. Reference numeral 10 denotes a refrigerant conduit which is formed by covering the outer periphery of the armature 6 with a cover plate 10a made of a non-magnetic material via a gap, and formed between the armature 6 and the cover plate 10a. I have. Reference numerals 11 and 12 denote a refrigerant inlet and a refrigerant outlet provided in the side plate 9, and flow the refrigerant injected from the refrigerant inlet 11 in the refrigerant conduit 10 formed between the outer periphery of the armature core 7 and the cover plate 10 a. Then, the refrigerant is discharged from the refrigerant discharge port 12 to the outside. Reference numeral 13 denotes an insulating resin filling the outer periphery of the winding 8. 14 is a holding plate.
Next, the operation of the table feed device of the machine tool will be described.
When the winding 8 of the armature 6 is energized, the table 5 is operated in the axial direction by an electromagnetic action with the magnetic flux of the permanent magnet of the stator 4. The current flowing through the winding 8 generates heat loss in the winding 8. This lost heat cools the armature core 7 by flowing the refrigerant injected from the refrigerant injection port 11 provided in the side plate 9 through the refrigerant conduit 10 while swinging along with the movement of the table 5. Therefore, the heat loss from the armature core 7 does not conduct to the table 5.
FIG. 4 is a cross-sectional view taken along the line AA of FIG. 2 showing a second embodiment of the present invention. A refrigerant conduit 15 having an elongated cross-section is provided outside the armature 6 and an end is formed. The side plate 9 is connected to the refrigerant inlet 11 and the refrigerant outlet 12. Therefore, the refrigerant flowing in the refrigerant conduit 15 oscillates along with the movement of the table 5 and flows to cool the armature core 7. Therefore, the heat loss from the armature core 7 does not conduct to the table 5.
FIG. 5 is a schematic configuration diagram of a machine tool showing a third embodiment of the present invention. FIG. 6 is an enlarged cross-sectional view of a main part.
Reference numeral 16 denotes a stator made of a permanent magnet, which is arranged on the bottom of the bed 1. Reference numeral 17 denotes an armature having windings 18, and the armature 17 is attached to the table 5 so that the teeth of the armature 17 face the stator 16. Reference numeral 19 denotes a can made of a non-magnetic material. The outer periphery of the winding 18 is filled with an insulating resin 20 and is attached to a fixed portion of the table 5 so as to surround the insulating resin 20. Reference numeral 21 denotes a refrigerant conduit, a cover plate 21a is attached to the can 19 via a gap, and an appropriate portion of the cover plate 21a is joined to the can 19 by a spot weld. It is divided into passages and charged with refrigerant. Therefore, the coolant flows through the plurality of partitioned coolant conduits 21 to cool the armature 17 and does not conduct the heat loss to the table 5.
[0006]
【The invention's effect】
As described above, according to the present invention, since the refrigerant circulates and cools the armature 6 provided on the table 5 while being moved by the movement of the table, there is no heat conduction to the table and thermal distortion of the table occurs. And processing accuracy is not impaired.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a machine tool showing a first embodiment of the present invention.
FIG. 2 is a plan view of a main part of the machine tool showing the first embodiment of the present invention.
FIG. 3 is a sectional view taken along line AA of FIG. 2;
FIG. 4 is a cross-sectional view of the second embodiment of the present invention, taken along line AA of FIG.
FIG. 5 is a schematic configuration diagram of a machine tool showing a third embodiment of the present invention.
FIG. 6 is a side sectional view of a main part of a machine tool showing a third embodiment of the present invention.
FIG. 7 is a schematic configuration diagram of a conventional machine tool.
[Explanation of symbols]
1 bed, 2 legs, 3 linear guide, 4 stator,
5 tables, 6 armatures, 7 armature cores, 7a winding storage grooves,
7b convex portion, 7c concave portion, 8 windings, 9 side plate, 10 refrigerant conduit,
10a cover plate, 11 refrigerant inlet, 12 refrigerant outlet,
13 insulating resin, 14 holding plate, 15 refrigerant conduit, 16 stator,
17 armature, 18 winding, 19 can, 20 insulating resin,
21 refrigerant conduit, 21a cover plate

Claims (2)

工作機械のベッド（１）に取付けた永久磁石よりなる固定子（４）と、該固定子（４）に対向して取付けられた電機子（６）を有するテーブル（５）とを備え、該テーブル（５）を直線方向に駆動する工作機械のテーブル送り装置において、
前記電機子（６）は、前記テーブル（５）の下面に、長方形に打ち抜き両側に巻線収納溝（７ａ）を、中央に係合部である凸部（７ｂ）、凹部（７ｃ）を有する電機子鉄板を積層した電機子鉄心（７）と、前記電機子鉄心（７）の巻線収納溝（７ａ）に整列巻きして収納した巻線（８）とを備えると共に、前記巻線（８）を巻装した電機子鉄心（７）の係合部（７ｂ）（７ｃ）を係合して構成しており、
前記巻線（８）の外周に充填した絶縁樹脂（１３）および前記電機子鉄心（７）の外周に非磁性体の覆板（１０ａ）が取付けられ、
前記絶縁樹脂（１３）および前記電機子鉄心（７）の外周と前記覆板（１０ａ）との間に冷媒を充填した冷媒導管（１０）を設けてあることを特徴とする工作機械のテーブル送り装置。A stator (4) made of a permanent magnet mounted on a bed (1) of a machine tool; and a table (5) having an armature (6) mounted opposite to the stator (4). In a table feeder of a machine tool for driving a table (5) in a linear direction,
The armature (6) has a winding receiving groove (7a) punched in a rectangular shape on the lower surface of the table (5) , a convex portion (7b) serving as an engaging portion , and a concave portion (7c) at the center. together provided with an armature iron plates laminated armature core (7), said armature core (7) of the winding wire housing grooves housed in winding aligned (7a) winding and (8), said windings ( the engagement portion of the armature core (7) wound around a 8) (7b) constitutes engaging the (7c),
A non-magnetic cover plate (10a) is attached to the insulating resin (13) filled around the outer periphery of the winding (8) and the outer periphery of the armature core (7),
Table feed of a machine tool, characterized in that a refrigerant pipe (10) filled with a refrigerant is provided between the insulating resin (13) and the outer periphery of the armature core (7) and the cover plate (10a). apparatus. 工作機械のベッド（１）に取付けた永久磁石よりなる固定子（４）と、該固定子（４）に対向して取付けられた電機子（６）を有するテーブル（５）とを備え、該テーブル（５）を直線方向に駆動する工作機械のテーブル送り装置において、
前記電機子（６）は、前記テーブル（５）の下面に、長方形に打ち抜き両側に巻線収納溝（７ａ）を、中央に係合部である凸部（７ｂ）、凹部（７ｃ）を有する電機子鉄板を積層した電機子鉄心（７）と、前記電機子鉄心（７）の巻線収納溝（７ａ）に整列巻きして収納した巻線（８）とを備えると共に、前記巻線（８）を巻装した電機子鉄心（７）の係合部（７ｂ）（７ｃ）を係合して構成しており、
前記電機子鉄心（７）および前記電機子鉄心（７）に巻装した巻線（８）を囲うキャン（１９）が設けられ、
このキャン（１９）の外周に非磁性体の覆板（２１ａ）が取付けられ、この覆板（２１ａ）をキャン（１９）に接合して覆板（２１ａ）とキャン（１９）とにより形成した複数の冷媒導管（２１）を設けてあることを特徴とする工作機械のテーブル送り装置。
【０００１】 A stator (4) made of a permanent magnet mounted on a bed (1) of a machine tool; and a table (5) having an armature (6) mounted opposite to the stator (4). In a table feeder of a machine tool for driving a table (5) in a linear direction,
The armature (6) has a winding receiving groove (7a) punched in a rectangular shape on the lower surface of the table (5), a convex portion (7b) serving as an engaging portion, and a concave portion (7c) at the center. An armature core (7) in which armature iron plates are stacked, and a winding (8) aligned and housed in a winding accommodating groove (7a) of the armature iron (7), and the winding ( 8) is engaged with the engaging portions (7b) and (7c) of the armature core (7) wound with
A can (19) surrounding the armature core (7) and the winding (8) wound around the armature core (7);
A non-magnetic cover plate (21a) is attached to the outer periphery of the can (19), and the cover plate (21a) is joined to the can (19) to form the cover plate (21a) and the can (19). A table feed device for a machine tool, comprising a plurality of refrigerant conduits (21).
[0001]
JP18781297A 1997-06-27 1997-06-27 Machine tool table feeder Expired - Fee Related JP3539140B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2002064968A (en) * 2000-08-21 2002-02-28 Nippon Thompson Co Ltd Slider with built-in moving coil linear motor
KR100893453B1 (en) * 2002-09-24 2009-04-17 두산인프라코어 주식회사 A High-Speed Rotary Table With Through-Spindle Cooling System
JP2005176464A (en) * 2003-12-09 2005-06-30 Toshiba Mach Co Ltd Linear motor
DE102006038416A1 (en) * 2006-08-17 2008-02-21 Siemens Ag Device slide with integrated motor part
JP5029830B2 (en) * 2007-12-27 2012-09-19 株式会社安川電機 Linear motor and table feeding device having the same
JP5369265B2 (en) * 2009-01-06 2013-12-18 東芝機械株式会社 Linear motor and linear moving stage device
KR101489031B1 (en) * 2010-03-11 2015-02-04 가부시키가이샤 야스카와덴키 Linear motor and table feed apparatus

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