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JP3046370B2 - Screw grinder with opposed wheel head - Google Patents

Screw grinder with opposed wheel head

Info

Publication number
JP3046370B2
JP3046370B2 JP3047484A JP4748491A JP3046370B2 JP 3046370 B2 JP3046370 B2 JP 3046370B2 JP 3047484 A JP3047484 A JP 3047484A JP 4748491 A JP4748491 A JP 4748491A JP 3046370 B2 JP3046370 B2 JP 3046370B2
Authority
JP
Japan
Prior art keywords
workpiece
grinding
grindstone
screw
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP3047484A
Other languages
Japanese (ja)
Other versions
JPH0647621A (en
Inventor
博 寺町
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
THK Co Ltd
Original Assignee
THK Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by THK Co Ltd filed Critical THK Co Ltd
Priority to JP3047484A priority Critical patent/JP3046370B2/en
Publication of JPH0647621A publication Critical patent/JPH0647621A/en
Application granted granted Critical
Publication of JP3046370B2 publication Critical patent/JP3046370B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明はねじ研削盤、特に長尺の
ねじ軸を研削するのに適するねじ研削盤に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread grinder, and more particularly to a thread grinder suitable for grinding a long screw shaft.

【0002】[0002]

【従来の技術】従来、単一直径の長尺のねじは剛性が小
さいのでねじ研削盤で研削すると、びびりが出たり、加
工物が弾性変形して研削中ねじの軸線が偏位し、ねじ精
度、特にねじ径のばらつきが生じ易い。このような剛性
のない加工物をねじ研削する場合は一般にふれ止めが用
いられている。
2. Description of the Related Art Conventionally, a long screw having a single diameter has a low rigidity. When grinding with a screw grinder, chattering occurs or a workpiece is elastically deformed, and the axis of the screw is displaced during grinding. Accuracy, especially variation in screw diameter, is likely to occur. In the case of thread grinding such a work piece having no rigidity, an anti-sway is generally used.

【0003】[0003]

【発明が解決しようとする課題】直径に比して長さが著
しく大きいねじ軸は剛性がないため、研削力に対向する
のにねじ軸の外径部分にシューを当てる。処がねじ軸は
ねじが旋削加工で研削代を付した状態にして焼入れされ
ており、硬度が高い。そこてシューはねじ山頂と接し、
研削力によりシューは大きな圧力を設ける。そのため、
シューが摩耗し易く、ねじの頂上の幅がせまくねじの山
頂とフランクの角部がねじ軸の回転により軸方向に移動
し、シューを削り易い。そこで加工中シューを追い込ん
で合せる必要があり、ふれ止めのシュー位置の調整が伴
う。このようなふれ止めは加工物の長さが長くなるに伴
って数を増加して加工物を支えるため、加工途中のふれ
止めの調整に時間がかかる。この点を一般的に長尺物加
工についてやや詳しくのべると加工物には研削抵抗の主
分力と背分力を合成した研削力が加わる。これを主分力
を受けるシューと背分力で受けるシューを備えた二点式
ふれ止めが一般的に使用されている。この場合、背分力
を受けるシューは研削精度に直接影響するので加工物に
対して所定位置に送り込まねばならない。又、主分力を
受けるシューには大きな力が加わるので耐摩性を考慮し
て、或程度、加工物の弾性を利用して退いた位置に置く
ことも出来る。従ってふれ止めの調整の場合背分力を受
けるシューは簡単には各々独立して加工物直径に関し、
同位置としてもよいが、主分力を受けるシューは軸方向
に配列した各ふれ止めが加工物を支持する態様に従って
加工物への送り込み量を調整する必要がある。以上のよ
うな訳でふれ止めの調整は時間がかかる。従って、ふれ
止めの数は必要最小限にとどめると共に砥石切込量に制
限を加える。
Since a screw shaft whose length is significantly larger than its diameter has no rigidity, a shoe is applied to the outer diameter portion of the screw shaft to oppose the grinding force. The screw shaft is hardened by turning the screw with grinding allowance by turning and has high hardness. Then the shoe touches the screw crest,
The shoe exerts a large pressure due to the grinding force. for that reason,
The shoe is easily worn, and the top of the screw and the corner of the flank where the width of the screw top is narrowed move in the axial direction due to the rotation of the screw shaft, so that the shoe is easily shaved. Therefore, it is necessary to drive and match the shoes during processing, which involves adjustment of the shoe position of the anti-sway. Since the number of such anti-skids increases as the length of the workpiece increases and supports the workpieces, it takes time to adjust the anti-sway during processing. This point is generally described in a little more detail in the processing of a long workpiece, and a workpiece is subjected to a grinding force obtained by combining a main component force and a back component force of the grinding resistance. A two-point anti-sway device having a shoe that receives the main component and a shoe that receives the component by a back force is generally used. In this case, the shoe subjected to the back force directly affects the grinding accuracy and must be sent to a predetermined position with respect to the workpiece. Further, since a large force is applied to the shoe which receives the main component force, the shoe can be placed at a retreated position to some extent by utilizing the elasticity of the workpiece in consideration of the wear resistance. Therefore, in the case of the anti-sway adjustment, the shoes subjected to the back force are simply independent of the workpiece diameter.
Although the same position may be used, the shoe receiving the main component force needs to adjust the feeding amount to the workpiece in accordance with a mode in which each of the cleats arranged in the axial direction supports the workpiece. For the reasons described above, it is time-consuming to adjust the anti-sway. Therefore, the number of anti-skids is kept to the minimum necessary, and the cutting amount of the grinding wheel is limited.

【0004】上記のようなねじ研削を行うので切込量が
少なく、ふれ止め調整のため、加工時間が著しくかか
る。一つのふれ止めに方向の異なる二個所のシューを関
連調整すると共に各ふれ止めに関し、互いのシュー位置
が関係するので非常に高度の熟練を要し、研削精度を向
上するのが困難である。
[0004] Since the above-mentioned thread grinding is performed, the amount of cut is small, and the processing time is remarkably increased due to the anti-sway adjustment. It is necessary to adjust two shoes having different directions to one wobble in association with each other, and it is very difficult to improve the grinding accuracy because it requires a very high degree of skill because the positions of the shoes are related to each other.

【0005】本発明は上記の点に鑑みてなされたもので
研削精度を向上でき、且つふれ止めの数を少なくできる
と共に研削能率の良好なねじ研削盤を提供することを目
的とする。
The present invention has been made in view of the above points, and an object of the present invention is to provide a screw grinding machine which can improve grinding accuracy, reduce the number of anti-skids, and have good grinding efficiency.

【0006】[0006]

【課題を解決するための手段】本発明の第1の発明は
尺の加工物の回転と研削砥石と加工物の軸方向の相対移
動の割合を一定にするねじ研削送り手段を備えたねじ研
削盤において、機台と、機台上に往復動自在に備えたテ
ーブルと、テーブルの駆動装置と、テーブル上にテーブ
ルの往復動方向に平行な線上に対向して備えた加工物主
軸台及び心押台と、加工物の両側において夫々機台上に
加工物の中心線を通り機台に対して垂直な垂直軸心を旋
回中心とする旋回位置調整装置を介して支持された二つ
スライドと、主軸台と心押台にて支持した加工物の
心線が前記垂直軸心で通る位置とほぼ同一位置の加工物
両側において加工物に向って進退自在にスライドに備
えた対向する二つの砥石台と、砥石台の駆動装置とを備
えた対向砥石台を備えたねじ研削盤である。
The first invention of the present invention has a long
In a screw grinder provided with a screw grinding feed means for keeping the ratio of the rotation of the work of the scale and the relative movement of the grinding wheel and the work in the axial direction constant, the machine base and the machine base are reciprocally movable. Table, table drive and table on table
Workpiece and headstock and tailstock with opposite parallel lines in the direction of reciprocation of the Le, on each machine frame on both sides of the workpiece
Two supported via a turning position adjustment device whose center of rotation is a vertical axis passing through the center line of the workpiece and perpendicular to the machine base
And slides in the workpiece supported by headstock and tailstock
Workpiece substantially the same position as cord passes in the vertical axis
And two wheel head which faces with the retractably slides toward the workpiece on both sides of a thread grinding machine provided with a counter wheel head with a grinding wheel head driving device.

【0007】本発明の第2の発明は長尺の加工物の回転
と研削砥石と加工物の軸方向の相対移動の割合を一定に
するねじ研削送り手段を備えたねじ研削盤において、機
台と、機台上に往復動自在に備えたテーブルと、テーブ
ルの駆動装置と、テーブル上にテーブルの往復動方向に
平行な線上に対向して備えた加工物主軸台及び心押台
と、加工物の両側の加工物から離れた位置において夫々
機台上に加工物の軸方向についての位置を調節可能に設
けられたサドルと、機台に対して垂直な垂直軸心を旋回
中心として旋回位置を調整可能にサドルに設けられた二
つのスイベルスライドと、主軸台と心押台にて支持した
加工物のほぼ同一位置の加工物の両側においてスイベル
スライド上に加工物に向って進退自在に備えた対向する
二つの砥石台と、砥石台の駆動装置とを備えた対向砥石
台を備えたねじ研削盤である。
A second invention of the present invention is the rotation of a long workpiece.
The ratio of the relative movement of the grinding wheel and the workpiece in the axial direction is constant
In a screw grinding machine equipped with a screw grinding feed means
A table, a table reciprocally movable on the machine base, and a table
Of the table and the reciprocating direction of the table on the table
Workpiece headstock and tailstock provided facing each other on parallel lines
And at a position away from the workpiece on both sides of the workpiece, respectively
The position of the workpiece in the axial direction can be adjusted on the machine base.
Swiveled saddle and vertical axis perpendicular to machine
Two wheels provided on the saddle so that the turning position can be adjusted as the center
Supported by two swivel slides, headstock and tailstock
Swivel on both sides of the workpiece at approximately the same location on the workpiece
Opposite on the slide so that it can move back and forth toward the workpiece
Opposed whetstone with two whetstone heads and a whetstone head drive
It is a screw grinder equipped with a table .

【0008】本発明の第3の発明は砥石台の後退位置に
おける砥石に作用する砥石修正装置を備え、各砥石の加
工物に対する作用位置と反対側の位置に砥石修正工具を
配設したことを特徴とする第1又は第2の発明に記載の
対向砥石台を備えたねじ研削盤である。
[0008] A third invention of the present invention is to move the grinding wheel head to the retracted position.
Equipped with a grindstone correction device that acts on the grindstone in
Place a grindstone correction tool on the opposite side of the
According to the first or second aspect of the present invention,
It is a screw grinder equipped with an opposed wheel head.

【0009】本発明の第4の発明は両砥石台は夫々加工
物に向って進退するスライド上に設けられ、スライドは
ねじ送り装置を介して数値制御装置により駆動されるサ
ーボモータにより駆動されることを特徴とする第1の発
明又は第2もしくは第3の発明に記載の対向砥石台を備
えたねじ研削盤である。
According to a fourth aspect of the present invention, the two grinding wheels are individually machined.
It is provided on a slide that moves back and forth toward an object, and the slide is
A sensor driven by a numerical controller via a screw feeder
A first motor driven by a servomotor.
Equipped with the opposed grinding wheel head according to the second or third invention.
This is a screw grinder.

【0010】本発明の第5の発明は両砥石台の砥石回転
方向が同方向であることを特徴とする第1から第4の発
明の何れか1つに記載の対向砥石台を備えたねじ研削盤
である。
[0010] A fifth invention of the present invention is a grinding wheel rotation of both wheel heads.
The first to fourth emission sources, wherein the directions are the same.
A thread grinder provided with the opposed wheel head according to any one of the preceding claims.
It is.

【0011】本発明の第6の発明は両砥石台の砥石回転
方向が互いに逆方向であることを特徴とする第1から第
4の発明の何れか1つに記載の対向砥石台を備えたねじ
研削盤である。
[0011] A sixth invention of the present invention is a grinding wheel rotation of both wheel heads.
The directions are opposite to each other.
A screw provided with the opposed wheel head according to any one of the fourth inventions
It is a grinding machine.

【0012】本発明の第7の発明は両砥石台の砥石台に
備えた砥石駆動用の主電動機は少なくともその一つが正
逆転可能であることを特徴とする第1から第4の発明の
何れか1つに記載の対向砥石台を備えたねじ研削盤であ
る。
[0012] A seventh invention of the present invention relates to a whetstone head of both whetstone heads.
At least one of the main motors for driving the grinding wheel
The first to fourth inventions are characterized in that they can be reversed.
A screw grinder provided with the opposed wheel head according to any one of the above.
You.

【0013】[0013]

【実施例】以下、本発明の実施例を図面に従って説明す
る。図1は平面図、図2は図1の側面図(親ねじ駆動用
のサーボモータ、軸受部を外してある)である。
Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view, and FIG. 2 is a side view of FIG. 1 (a servomotor for driving a lead screw and a bearing are removed).

【0014】機台1上に設けたいわゆるV−ひらの案内
2にテーブル3が滑合し、テーブル3は機台1上を往復
動自在となっている。このテーブル3には送りナット4
が取付けられ、送りナット4には案内2に平行な親ねじ
5がねじ込まれている。
A table 3 slides on a so-called V-palm guide 2 provided on the machine base 1, and the table 3 can reciprocate on the machine base 1. This table 3 has a feed nut 4
A lead screw 5 parallel to the guide 2 is screwed into the feed nut 4.

【0015】テーブル3上にはテーブル3の往復動する
方向に加工物主軸台6が固定され、加工物主軸台6に対
向して心押台9が位置を調節可能に固定されている。加
工物主軸台6は上部の電動機10からベルト装置11を
介して入力され、内部の減速歯車を介して加工物主軸8
に回転が伝達されるようになっている。加工物Wは加工
物主軸8に嵌入するセンタ12と心押台9に出入りが調
整されるスリーブ13に嵌入するセンタ14に支持され
ている。加工物Wは加工物Wに固定した回し金15に係
合した駆動具16で回転させられる。駆動具16は加工
物主軸8に固定されている。
A work headstock 6 is fixed on the table 3 in the direction in which the table 3 reciprocates, and a tailstock 9 is fixed to the work headstock 6 so that the position of the tailstock 9 can be adjusted. The workpiece headstock 6 is input from the upper electric motor 10 via the belt device 11 and is supplied via the internal reduction gear to the workpiece spindle 8.
The rotation is transmitted to. The workpiece W is supported by a center 12 that fits into the workpiece spindle 8 and a center 14 that fits into a sleeve 13 whose entry and exit are adjusted to the tailstock 9. The workpiece W is rotated by a driving tool 16 engaged with a screw 15 fixed to the workpiece W. The driving tool 16 is fixed to the workpiece spindle 8.

【0016】加工物主軸台6と心押台9にて支持した加
工物Wの軸方向のほぼ同一位置の両側に向って斜めに進
退自在に対向する砥石台18,118をスライド17,
117上に備えている。このためスライド17,117
には機台1の案内2に交叉方向の案内19,119が設
けられ、各砥石台本体21,121が該案内19,11
9に滑合している。砥石台本体21,121には夫々案
内19,119に直交する砥石軸22,122が回転自
在に支持されている。砥石台本体21,121上に設け
た主電動機23,123と砥石軸22,122はベルト
装置24,124で連結されている。砥石軸22,12
2には加工物Wに形成するねじの谷の形状に合せた半径
方向断面を持つ砥石25,125が取付けられている。
砥石25,125は加工物Wの直径をはさんで反対側に
あり、加工物Wの軸方向では加工物Wに形成するねじの
半ピッチ分、離した位置に研削作用部がある。スライド
17,117には砥石台18,118の駆動装置が設け
てある。
Slides 17 and 18 are provided on opposite sides of the grindstone heads 18 and 118 which are diagonally opposed to the workpiece W supported on the workpiece headstock 6 and the tailstock 9 so as to be able to reciprocate obliquely toward both sides at substantially the same position in the axial direction.
117. For this reason, slides 17, 117
The guides 2 of the machine base 1 are provided with guides 19, 119 in the cross direction in the guide 2 of the machine base 1.
9 is slipping. Grinding wheel shafts 22 and 122 orthogonal to the guides 19 and 119 are rotatably supported on the wheel head main bodies 21 and 121, respectively. The main motors 23 and 123 provided on the wheel head main bodies 21 and 121 and the wheel shafts 22 and 122 are connected by belt devices 24 and 124. Whetstone shaft 22, 12
Grindstones 25 and 125 having a radial cross section corresponding to the shape of the thread valley formed on the workpiece W are attached to the workpiece 2.
The grindstones 25 and 125 are on opposite sides of the diameter of the workpiece W, and a grinding action portion is provided at a position separated by half a pitch of a screw formed on the workpiece W in the axial direction of the workpiece W. The slides 17 and 117 are provided with driving devices for the grindstone stands 18 and 118.

【0017】砥石台18,118の駆動装置はスライド
17,117に固定したサーボモータ26,126とサ
ーボモータ26,126に夫々連結され案内19,11
9に平行な切込み送りねじ27,127と、切込み送り
ねじ27,127がねじ込まれ、砥石台本体21,12
1に固定された送りナット28,128からなってい
る。
The drive units for the wheel heads 18, 118 are servomotors 26, 126 fixed to the slides 17, 117 and guides 19, 11 connected to the servomotors 26, 126, respectively.
The cutting feed screws 27, 127 parallel to 9 and the cutting feed screws 27, 127 are screwed into the grindstone main bodies 21, 12.
1 comprises feed nuts 28 and 128 fixed at 1.

【0018】図1に示すように砥石修正装置29,12
9がスライド17,117上に設けてある。両砥石修正
装置29,129はその砥石修正工具31,131を対
向しており、各砥石25,125の背部から各砥石2
5,125に作用するようになっており、同構成である
ので砥石修正装置29について説明する。砥石修正工具
31はロータリドレッサである。砥石修正工具31は砥
石修正工具台32に砥石軸22に平行な図示されない回
転軸に固定されており、該工具台32に内蔵したモータ
によって回転駆動されるようになっている。砥石修正工
具台32は砥石軸22に平行及び直交する方向に位置を
調整可能にスライド17,117に固定されている。
As shown in FIG.
9 is provided on the slides 17,117. The two grindstone correction devices 29 and 129 face the grindstone correction tools 31 and 131, and the respective grindstones 2, 125 from the back of the grindstones 25 and 125.
5, 125, and has the same configuration, so that the grindstone correcting device 29 will be described. The grindstone correction tool 31 is a rotary dresser. The grindstone correction tool 31 is fixed to a grindstone correction tool table 32 on a rotating shaft (not shown) parallel to the grindstone shaft 22, and is rotated by a motor built in the tool table 32. The grindstone correction tool base 32 is fixed to the slides 17 and 117 so that its position can be adjusted in directions parallel and orthogonal to the grindstone shaft 22.

【0019】スライド17,117は機台1上に設けた
円弧案内条33,133に回転自在に滑合している。円
弧案内条33,133は同一の中心Oを有する。中心O
は第1図でみて加工物Wの中心と砥石25,125の幅
方向の中心をとおる直線の交点をとおる垂線と一致す
る。
The slides 17, 117 are rotatably fitted to arc guide strips 33, 133 provided on the machine base 1. The arc guide strips 33 and 133 have the same center O. Center O
1 corresponds to a perpendicular passing through the intersection of a straight line passing through the center of the workpiece W and the center in the width direction of the grindstones 25 and 125 in FIG.

【0020】円弧案内条33,133に沿って円弧形の
角度スケール34,134が設けられ、スライド17,
117には該角度スケール34,134の読み取り装置
35,135が取り付けられている。又、円弧案内条3
3,133と同心のウォームホイルセグメント36,1
36がスライド17,117に固定され、該ウォームホ
イルセグメント36,136にかみ合うウォーム37,
137はその軸38,138が機台1に設けた軸受3
9,139に支持され、軸38,138の軸端にはリー
ド角調整ハンドル41,141が取付けられている。
An arc-shaped angle scale 34, 134 is provided along the arc guide strip 33, 133, and the slide 17,
At 117, readers 35 and 135 for the angle scales 34 and 134 are attached. Also, arc guide strip 3
Worm wheel segment 36,1 concentric with 3,133
The worm 37 is fixed to the slides 17 and 117 and engages with the worm wheel segments 36 and 136.
137 is a bearing 3 whose shafts 38, 138 are provided on the machine base 1.
9, 139, and lead angle adjustment handles 41, 141 are attached to the shaft ends of the shafts 38, 138.

【0021】加工物Wを回転して加工物Wのねじピッチ
に相当するテーブル3の送り量を得るためには、親ねじ
5と加工物主軸8を所望のねじピッチを得るように一定
回転比で回転させる。そこでこの部分は周知の数値制御
装置或は交換歯車箱もしくはこれらの組合せが用いられ
る。本例では数値制御による例をのべる。機台1に固定
したZ軸サーボモータ7はその出力軸が親ねじ5に連結
されている。加工物主軸8にはエンコーダ43が連結さ
れている。加工物主軸8の回転により、エンコーダ43
が発する信号は数値制御装置44に入力され、数値制御
装置44はZ軸サーボモータ7を加工物主軸8の回転に
対して一定割合で親ねじ5を回転するようになってい
る。尚、加工物Wのねじピッチを得るためには加工物主
軸8を数値制御のサーボモータで回転し、テーブル3の
長手方向に機台1上又はテーブル3にリニヤースケール
を設け、テーブル3又は機台1に該リニヤースケールの
読取り装置を設けることによって、読み取られるテーブ
ル3位置に対応して加工物主軸8の回転角を対応させる
としてもよいものである。
In order to obtain the feed amount of the table 3 corresponding to the thread pitch of the workpiece W by rotating the workpiece W, the lead screw 5 and the workpiece spindle 8 are rotated at a constant rotation ratio so as to obtain a desired thread pitch. Rotate with. Therefore, a well-known numerical controller, a replaceable gear box, or a combination thereof is used for this part. In this example, an example by numerical control will be described. The output shaft of the Z-axis servo motor 7 fixed to the machine base 1 is connected to the lead screw 5. An encoder 43 is connected to the workpiece spindle 8. The rotation of the workpiece spindle 8 causes the encoder 43 to rotate.
Is input to the numerical controller 44, which rotates the lead screw 5 of the Z-axis servomotor 7 at a fixed rate with respect to the rotation of the work spindle 8. In order to obtain the thread pitch of the workpiece W, the workpiece spindle 8 is rotated by a numerically controlled servomotor, and a linear scale is provided on the machine base 1 or on the table 3 in the longitudinal direction of the table 3. By providing the linear scale reading device in the machine base 1, the rotation angle of the workpiece spindle 8 may be made to correspond to the position of the table 3 to be read.

【0022】次に上記構成における作用を説明する。Next, the operation of the above configuration will be described.

【0023】先ず数値制御装置44に切るべきねじピッ
チ、ねじの長さ、切込量、研削サイクルのプログラムを
入力する。次に該ねじピッチに対応するリード角を計算
する。リード角調整ハンドル41,141を回転すると
ウォーム軸38,138が回転し、ウォーム37,13
7を回転させる。ウォーム37,137はウォームホイ
ルセグメント36,136を回転する。ウォームホイル
セグメント36,136とスライド17,117は固定
されているのでスライド17,117は円弧案内条3
3,133に案内されて水平面内で傾動する。角度読取
り装置35,135でもってリード角を得られるように
角度スケール34,134を読み取ると、砥石25,1
25の幅方向の中心を結ぶ水平線は加工物Wの軸心に対
して所要のリード角となって傾く。
First, a program for a thread pitch, a thread length, a cutting depth, and a grinding cycle to be cut is input to the numerical controller 44. Next, a lead angle corresponding to the screw pitch is calculated. When the lead angle adjusting handles 41, 141 are rotated, the worm shafts 38, 138 are rotated, and the worms 37, 13 are rotated.
7 is rotated. The worms 37, 137 rotate the worm wheel segments 36, 136. Since the worm wheel segments 36 and 136 and the slides 17 and 117 are fixed, the slides 17 and 117 are
3,133 to be tilted in a horizontal plane. When the angle scales 34 and 134 are read by the angle readers 35 and 135 so as to obtain a lead angle, the grindstones 25 and 1 are read.
The horizontal line connecting the centers in the width direction of 25 is inclined at a required lead angle with respect to the axis of the workpiece W.

【0024】加工物Wに対する切込みは1例として図4
に示す。加工物Wのブランクは研削代を付して下ねじが
切られており、外径D0は通常旋削加工して、焼入研削
されている。1回の砥石25の半径方向の切込量(以下
の切込みは加工物Wの半径方向の切込みで説明し、単に
切込量と称す)をt1、砥石125の切込量をt2とす
る。回転方向は加工物Wを図4において時計回りとする
と通常砥石25,125は時計回りであり、加工物Wの
周面の移動方向と、砥石25,125の周面の移動方向
は反対方向である。ふれ止めを用いない場合切込t1,
t2は砥石25,125の研削抵抗の主分力がほぼ等し
いように選択する。
The cut into the workpiece W is shown in FIG.
Shown in The blank of the workpiece W is provided with a grinding allowance and the lower screw is cut, and the outer diameter D0 is usually turned and hardened. The amount of cutting in the radial direction of the grindstone 25 (the following cutting is described as the amount of cutting in the radial direction of the workpiece W, and is simply referred to as the amount of cutting) is t1, and the amount of cutting of the grindstone 125 is t2. Assuming that the rotation direction of the work W is clockwise in FIG. 4, the normal grindstones 25 and 125 are clockwise, and the moving direction of the circumferential surface of the work W and the moving direction of the circumferential surface of the grindstones 25 and 125 are opposite directions. is there. When not using the anti-slip, cut t1,
t2 is selected so that the main components of the grinding resistance of the grindstones 25 and 125 are substantially equal.

【0025】上記のように砥石切込み量t1,t2を設
定するには砥石修正装置29,129を基準に行う。砥
石修正工具31,131はダイヤモンドロールであり摩
耗量が極めて小さい。従って、実用上砥石修正工具3
1,131の研削作用面は一定位置にあると見做し得
る。砥石25,125は砥石台18,118を送りねじ
27,127、送りナット28,128を介して移動さ
せるサーボモータ26,126の回転位置が数値制御装
置44により与えられることにより、砥石25,125
の直径は演算されるから、砥石25,125の切込み送
りのための砥石台18,118の移動量も原点位置を基
準に演算され、砥石修正を行っても砥石切込み量t1,
t2を求めることが可能である。
As described above, in order to set the grinding wheel cutting amounts t1 and t2, the grinding wheel correction devices 29 and 129 are used as a reference. The grinding wheel correction tools 31 and 131 are diamond rolls, and the wear amount is extremely small. Therefore, the grinding wheel correction tool 3 for practical use
The 1,131 grinding action surfaces can be considered to be in a fixed position. The rotational positions of the servo motors 26 and 126 for moving the grindstone stands 18 and 118 through the feed screws 27 and 127 and the feed nuts 28 and 128 are given by the numerical controller 44 to the grindstones 25 and 125, so that the grindstones 25 and 125 are adjusted.
Is calculated, the amount of movement of the grindstone stands 18, 118 for cutting and feeding of the grindstones 25, 125 is also calculated with reference to the origin position.
It is possible to determine t2.

【0026】加工物Wのブランクに回し金15を取付
け、加工物主軸台6のセンタ12、心押台9のセンタ1
4間に加工物Wを取付、駆動具16と回し金15を係合
させる。主電動機23,123を回転すると夫々ベルト
装置24,124を介して砥石軸22,122は回転
し、砥石25,125は回転する。数値制御装置44を
操作してZ軸サーボモータ7を付勢して親ねじ5を回転
し、送りナット4を移動してテーブル3を送り、加工物
Wの心押台側端部から外れた原点位置が砥石25,12
5に来るようにテーブル3を移動し、次に数値制御装置
44のスタートボタンを押すとサーボモータ26,12
6は付勢され、切込み送りねじ27,127を回転し、
送りナット28,128を移動して砥石台18,118
を互いに接近させ、砥石25のり切込み量がt1、砥石
125の切込み量がt2になり、サーボモータ26,1
26は停止して砥石25,125は移動を停止し、第4
図のように切込み量がセットされる。続いて数値制御装
置44に入力されているプログラムにより、数値制御装
置44の補助機能により加工物主軸台6上の電動機10
が付勢される。電動機10の回転はベルト装置11を介
して加工物主軸8に伝えられ、駆動具16、回し金15
を介して加工物Wは回転する。
A screw 15 is attached to the blank of the work W, and the center 12 of the work headstock 6 and the center 1 of the tailstock 9 are mounted.
The workpiece W is mounted between the four, and the driving tool 16 and the turn 15 are engaged. When the main motors 23 and 123 rotate, the grindstone shafts 22 and 122 rotate through the belt devices 24 and 124, respectively, and the grindstones 25 and 125 rotate. The numerical controller 44 is operated to urge the Z-axis servomotor 7 to rotate the lead screw 5, move the feed nut 4 to feed the table 3, and come off the tailstock side end of the workpiece W. Origin position 25, 12
The table 3 is moved so as to reach the position No. 5 and then the start button of the numerical controller 44 is pressed.
6 is urged to rotate the cut feed screws 27, 127,
Move the feed nuts 28, 128 to move the grindstones 18, 118
Are brought close to each other, the cutting amount of the grindstone 25 becomes t1, the cutting amount of the grindstone 125 becomes t2, and the servomotors 26, 1
26 stops and the grindstones 25 and 125 stop moving.
The cut amount is set as shown in the figure. Subsequently, the electric motor 10 on the workpiece headstock 6 is assisted by the auxiliary function of the numerical controller 44 according to the program input to the numerical controller 44.
Is energized. The rotation of the electric motor 10 is transmitted to the workpiece spindle 8 via the belt device 11, and the driving tool 16, the screw 15
Workpiece W is rotated via.

【0027】加工物主軸8の回転によりエンコーダ43
は加工物主軸8の回転角、即ち、加工物Wの回転角を検
出して数値制御装置44へ送る。数値制御装置44は入
力されている加工物Wのねじピッチを得るようにエンコ
ーダ43の回転角に対して一定割合でZ軸サーボモータ
7を回転して親ねじ5を回転し、テーブル3を送って加
工物Wを軸方向に右行させる。これによって、加工物W
の研削が行われる。
The rotation of the work spindle 8 causes the encoder 43 to rotate.
Detects the rotation angle of the workpiece spindle 8, that is, the rotation angle of the workpiece W, and sends it to the numerical controller 44. The numerical controller 44 rotates the Z-axis servomotor 7 at a fixed ratio with respect to the rotation angle of the encoder 43 to rotate the lead screw 5 and sends the table 3 so as to obtain the input thread pitch of the workpiece W. The workpiece W to the right in the axial direction. Thereby, the workpiece W
Grinding is performed.

【0028】加工物Wのねじ部の図1において左端が砥
石25,125の位置に来ると、数値制御の電動機10
が停止すると共にZ軸サーボモータ7が停止し、サーボ
モータ26,126は付勢され、砥石25,125は後
退して停止し、Z軸サーボモータ7は付勢され、テーブ
ル3を左行させ、Z軸上元の位置へ加工物Wを移動させ
て停止する。第2回目の研削は砥石25,125に更に
切込みが与えられ、同サイクルがくり返される。砥石2
5,125の研削作用面の修正は砥石25,125を後
退して砥石修正装置29,129を付勢して砥石修正工
具31,131により行う。
When the left end of the thread portion of the workpiece W in FIG. 1 comes to the position of the grindstones 25 and 125, the numerically controlled motor 10
Stops, the Z-axis servomotor 7 stops, the servomotors 26 and 126 are energized, the grindstones 25 and 125 retract and stop, and the Z-axis servomotor 7 is energized to move the table 3 to the left. , The workpiece W is moved to the original position on the Z axis and stopped. In the second grinding, the grindstones 25 and 125 are further cut, and the same cycle is repeated. Whetstone 2
Correction of the grinding surface of 5,125 is performed by the grindstone correcting tools 31 and 131 by retracting the grindstones 25 and 125 and urging the grindstone correcting devices 29 and 129.

【0029】砥石修正後は砥石25,125の砥石修正
工具31,131への切込量が数値制御装置44によ
り、与えられているので数値制御装置44は該切込み量
を補正して加工物Wへの砥石25,125の切込み量を
演算することは常に行われる。
After the grindstones are corrected, the numerical control device 44 gives the cutting amounts of the grindstones 25 and 125 to the grindstone correction tools 31 and 131. Therefore, the numerical control device 44 corrects the cutting amounts and corrects the work W The amount of cutting of the grindstones 25 and 125 into the wheel is always calculated.

【0030】加工物Wに加わる研削抵抗は図4に示すよ
うに砥石25の研削抵抗は主分力F1、背分力F2、砥
石125の研削抵抗は主分力101、背分力F102で
あり、主分力F1≒F101背分力F2≒F102とな
る。
As shown in FIG. 4, the grinding resistance applied to the workpiece W is such that the grinding resistance of the grindstone 25 is the main component force F1, the back component force F2, and the grinding resistance of the grindstone 125 is the main component force 101, the back component force F102. , The main component force F1 ≒ F101 and the back component force F2 ≒ F102.

【0031】上記のように砥石25,125の研削抵抗
を均衡させ得るので加工物Wには曲げ力が殆どかからな
いので加工物Wが細長くてもふれ止めなしで加工可能で
あり、ふれ止めを用いる場合も従来に比してきわめて少
なくてすむ。尚ふれ止めは図5に示すように加工物Wの
下方より上下動するVブロック73、又は図6に示すよ
うに加工物Wの下方より上下動する上面が平らな受金7
4でもよい。
As described above, since the grinding resistance of the grindstones 25 and 125 can be balanced, a bending force is hardly applied to the workpiece W. Therefore, even if the workpiece W is elongated, the workpiece W can be machined without the anti-skid, and the anti-skid is used. In this case, the number is extremely small as compared with the conventional case. The anti-sway device is a V-block 73 that moves up and down from below the workpiece W as shown in FIG. 5, or a metal support 7 that moves up and down from below the workpiece W as shown in FIG.
4 may be used.

【0032】次に他の実施例について説明する。図7は
前実施例の図1に対応する平面図を示している。前実施
例と異なる点をのべると、この実施例では各砥石台1
8,118はZ軸方向に移動可能なスイベルスライド装
置上に担持され、これらは、加工物Wの両側に対称に配
置されるので主として片側のみについて説明する。機台
1上には案内2と平行に案内51が設けられ、案内51
にサドル52が案内され。サドル52の上面に設けた円
弧形案内(図に現われない)にはスイベルスライド53
が回転可能に案内され、スイベルスライド53上に設け
た案内19に砥石台18が案内され、砥石軸22と案内
19は直交している。
Next, another embodiment will be described. FIG. 7 is a plan view corresponding to FIG. 1 of the previous embodiment. The points different from the previous embodiment are as follows.
8, 118 are carried on a swivel slide device movable in the Z-axis direction, and since these are arranged symmetrically on both sides of the workpiece W, mainly only one side will be described. A guide 51 is provided on the machine base 1 in parallel with the guide 2.
Is guided to the saddle 52. A circular guide (not shown) provided on the upper surface of the saddle 52 has a swivel slide 53.
Are rotatably guided, the grindstone table 18 is guided by a guide 19 provided on a swivel slide 53, and the grindstone shaft 22 and the guide 19 are orthogonal to each other.

【0033】機台1上に回転自在に設けた送りねじ50
と、サドル52に固定された該送りねじ50がねじ込ま
れる送りナット(図示されない)を備えたねじ送り装置
54が設けられ、ねじ送り装置54の送りねじ50はマ
イクロメータ装置55を備えたZ軸送りハンドル56に
固定されている。
A feed screw 50 rotatably provided on the machine base 1
And a screw feeder 54 having a feed nut (not shown) into which the feed screw 50 fixed to the saddle 52 is screwed. The feed screw 50 of the screw feeder 54 has a Z-axis provided with a micrometer device 55. It is fixed to the feed handle 56.

【0034】スイベルスライド53には同芯上にウォー
ムホイルセグメント57が固定され、ウォームホイルセ
グセメント57にはウォーム58がかみ合う。ウォーム
58のウォーム軸59はサドル52に設けた軸受61に
支持され、軸端に角度ハンドル62を備える。スイベル
スライド53上に設けた角度目盛63はサドル52に設
けた読取り装置64で読み取られるようになっている。
A worm wheel segment 57 is coaxially fixed to the swivel slide 53, and a worm 58 meshes with the worm wheel seg cement 57. The worm shaft 59 of the worm 58 is supported by a bearing 61 provided on the saddle 52, and has an angle handle 62 at the shaft end. The angle scale 63 provided on the swivel slide 53 is read by a reading device 64 provided on the saddle 52.

【0035】前実施例と異なる作用は砥石台の傾動位置
調整である。角度ハンドル62を回転するとウォーム軸
59が回転してウォーム58が回転し、ウォームホイル
セグメント57を回転する。これによってスイベルスラ
イド53が回転し、砥石台18が回転して砥石25は加
工物Wに対して傾く。角度目盛63を角度読取り装置6
4によって読み取り、加工物Wのリード角に合せる。同
様に砥石125を砥石25と同角度傾ける。次にZ軸送
りハンドル56を回転するとねじ送り装置54を介して
サドル52は移動するので砥石25,125の加工物W
の軸方向位置を調整する。そして砥石25,125の幅
の中心をとおる線が図1において一直線上になるように
する。対向する砥石台118に関しても同様に操作す
る。
The operation different from that of the previous embodiment is the adjustment of the tilting position of the grinding wheel head. When the angle handle 62 is rotated, the worm shaft 59 is rotated, and the worm 58 is rotated, and the worm wheel segment 57 is rotated. As a result, the swivel slide 53 rotates, the grindstone table 18 rotates, and the grindstone 25 is inclined with respect to the workpiece W. Angle scale 63 is read by angle reading device 6
4 is read and adjusted to the lead angle of the workpiece W. Similarly, the grindstone 125 is inclined at the same angle as the grindstone 25. Next, when the Z-axis feed handle 56 is rotated, the saddle 52 moves via the screw feed device 54, so that the workpiece W of the grindstones 25 and 125 is moved.
Adjust the axial position of. Then, the line passing through the center of the width of the grindstones 25 and 125 is aligned with the straight line in FIG. The same operation is performed with respect to the opposing grindstone table 118.

【0036】図8は更に他の実施例の正面図である。図
において機台1を切断した部分の上には手前側の砥石台
18が存在するが切断図示のため、図には現われず、後
部側の砥石台118のみが図示されている。前記実施例
と異なる部分は加工物Wの回転角とテーブル3の位置の
関係を交換歯車箱71にて得るようにした点である。加
工物主軸8と、テーブル3の両端にて軸受72により支
持した親ねじ5は夫々交換歯車箱71を介して連結され
ている。交換歯車箱71中にはねじピッチに対応して選
択的にかみ合せる歯車群が設けられており、図示されな
いレバー操作により、歯車列を選択する。又、一部歯車
対は手動交換出来るようにして特殊なピッチ等に備え
る。交換歯車箱71は汎用旋盤で周知されているので詳
細な説明は省略する。この場合、親ねじ5がねじ込まれ
る送りナット4は機台1に固定されている。
FIG. 8 is a front view of still another embodiment. In the figure, a grinding wheel base 18 on the near side exists above the portion where the machine base 1 has been cut, but it is not shown in the drawing for the sake of cutting, and only the grinding wheel base 118 on the rear side is shown. The difference from the above embodiment is that the relationship between the rotation angle of the workpiece W and the position of the table 3 is obtained by the exchange gear box 71. The work spindle 8 and the lead screw 5 supported by bearings 72 at both ends of the table 3 are connected to each other via a replacement gear box 71. A group of gears that are selectively engaged in accordance with the screw pitch are provided in the exchange gear box 71, and a gear train is selected by operating a lever (not shown). Some of the gear pairs can be replaced manually to prepare for a special pitch or the like. Since the exchange gear box 71 is well known in general-purpose lathes, detailed description is omitted. In this case, the feed nut 4 into which the lead screw 5 is screwed is fixed to the machine base 1.

【0037】[0037]

【発明の効果】本発明の第1及び第2の発明は (1)砥石の切込量を増大できるから研削能力が著しく
増大する。 (2)砥石の切込量を増大しても二つの砥石の研削抵抗
を打消すようにすることにより、加工物に加わる曲げモ
ーメントを小さくできるため、ふれ止めを要しないか、
或はふれ止めの数を少なくできる。 (3)従来のねじ研削盤に比して、同一切込みの場合に
加工物に加わる力が小さいので、加工物の変形による加
工物の寸法誤差、形状誤差が小さくなる。 (4)ふれ止めは加工物を一方向から支持すればよいか
ら構造簡単であり、調整は速やかに行われる。
The first and second aspects of the present invention are as follows: (1) Since the cutting depth of the grinding wheel can be increased, the grinding ability is significantly increased. (2) Even if the cutting depth of the grinding stones is increased, the bending moment applied to the workpiece can be reduced by canceling the grinding resistance of the two grinding stones.
Alternatively, the number of steady rests can be reduced. (3) Since the force applied to the workpiece at the same depth of cut is smaller than that of a conventional thread grinder, the dimensional error and the shape error of the workpiece due to the deformation of the workpiece are reduced. (4) The anti-sway device has a simple structure because it only needs to support the workpiece in one direction, and the adjustment is performed quickly.

【0038】本発明の第の発明は各砥石修正装置の砥
石修正工具と加工物へ切込状態の砥石との距離を等しく
しておくと、各砥石台を等距離後退させることにより、
砥石修正を行うことが出来、例えば成形ロータリダイヤ
モンドドレッサを用いる場合には修正工具摩耗は殆どな
いから、砥石径は等しく切込まれ、砥石の寸法管理が容
易である。
According to a third aspect of the present invention, when the distance between the grindstone correction tool of each grindstone correcting device and the grindstone in a cut state to the workpiece is made equal, each grindstone table is retracted by the same distance.
The grinding wheel can be modified. For example, when a molded rotary diamond dresser is used, there is almost no wear of the modified tool. Therefore, the diameter of the grinding wheel is cut evenly, and the dimensional control of the grinding wheel is easy.

【0039】本発明の第の発明は各砥石台は夫々別個
の送り装置により数値制御装置により駆動されるから、
両砥石の切込み差を設定出来、同時切込み作用を容易に
行うことが出来る。
According to the fourth aspect of the present invention, each wheel head is driven by a numerical controller by a separate feeder.
It is possible to set a cutting difference between both whetstones, so that simultaneous cutting action can be easily performed.

【0040】本発明の第の発明は両砥石は同一方向に
回転するから、両砥石の周面の移動方向は加工物周面の
移動方向に対して共に同方向又は共に逆方向とすること
ができる。
According to the fifth aspect of the present invention, since both grinding wheels rotate in the same direction, the moving directions of the peripheral surfaces of the two grinding wheels are both the same direction or the opposite directions to the moving direction of the workpiece peripheral surface. Can be.

【0041】本発明の第の発明は両砥石は互いに逆方
向に回転するから、両砥石は加工物周面の移動方向に関
して、一方の砥石の周面は同方向、他方の砥石の周面は
逆方向に移動する。即ち、アプカット研削とダウンカッ
ト研削を組合すことができる。
According to the sixth aspect of the present invention, since both wheels rotate in opposite directions, both wheels have the same circumferential direction with respect to the direction of movement of the workpiece circumferential surface, and the circumferential surface of the other wheel has the same direction. Moves in the opposite direction. That is, upcut grinding and downcut grinding can be combined.

【0042】本発明の第の発明は両砥石の何れか一つ
が正逆転するから、両砥石は同方向に回転することが出
来ると共に両砥石を互いに逆方向に回転することができ
る。従って、上記第4、第5の発明における研削方法の
何れでも選択できる。
According to the seventh aspect of the present invention, since either one of the two grindstones rotates forward and backward, both grindstones can rotate in the same direction and both grindstones can rotate in mutually opposite directions. Therefore, any of the grinding methods according to the fourth and fifth aspects can be selected.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例の平面図である。FIG. 1 is a plan view of an embodiment of the present invention.

【図2】図1の側面図である。FIG. 2 is a side view of FIG.

【図3】図1のA−A断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 1;

【図4】研削切込み例を示す加工物に直角な側面図であ
る。
FIG. 4 is a side view perpendicular to a workpiece showing a grinding cut example.

【図5】ふれ止めの側面図である。FIG. 5 is a side view of the steady rest.

【図6】ふれ止めの側面図である。FIG. 6 is a side view of the steady rest.

【図7】他の実施例の平面図である。FIG. 7 is a plan view of another embodiment.

【図8】更に他の実施例の一部断面で示す正面図であ
る。
FIG. 8 is a front view showing a partial cross section of still another embodiment.

【符号の説明】[Explanation of symbols]

W・・加工物 1・・機台 2・・案内 3・・テーブ
ル 4・・送りナット5・・親ねじ 6・・加工物主軸
台 7・・Z軸サーボモータ 8・・加工物主軸 9・
・心押台 10・・電動機 11・・ベルト装置 12
・・センタ13・・スリーブ 14・・センタ 15・
・回し金 16・・駆動具 17,117・・スライド
18,118・・砥石台 19,119・・案内 2
1,121・・砥石台本体 22,122・・砥石軸
23,123・・主電動機24,124・・ベルト装置
25,125・・砥石 26,126・・サーボモー
タ 27,127・・送りねじ 28,128・・送り
ナット 29,129・・砥石修正装置 31,131
・・砥石修正工具 32・・砥石修正工具台33,13
3・・円弧案内条 34,134・・角度スケール 3
5,135・・読取り装置 36,136・・ウォーム
ホイルセグメント 37,137・・ウォーム 38,
138・・軸 39,139・・軸受 41,141・
・リード角調整ハンドル 43・・エンコーダ 44・
・数値制御装置 51・・案内 52・・サドル 53
・・スイベルスライド 54・・ねじ送り装置 55・
・マイクロメータ装置 56・・Z軸ハンドル 57・
・ウォームホイルセグメント 58・・ウォーム 59
・・ウォーム軸 61・・軸受 62・・ハンドル 6
3・・角度目盛 64・・角度読取り装置 71・・交
換歯車箱 72・・軸受 73・・Vブロック 74・
・受金。
Workpiece 1. Machine stand 2. Guide 3. Table 4. Feed nut 5. Lead screw 6. Workpiece headstock 7. Z-axis servo motor 8. Workpiece spindle 9.
・ Tailstock 10 ・ ・ Electric motor 11 ・ ・ Belt device 12
・ ・ Center 13 ・ ・ Sleeve 14 ・ ・ Center 15 ・
・ Spindle 16 ・ ・ Drive device 17,117 ・ ・ Slide 18,118 ・ ・ Whetstone stand 19,119 ・ ・ Guidance 2
1,121 ・ ・ Whetstone base 22,22 ・ ・ Wheel axis
23, 123 ··· Main motor 24, 124 · · · Belt device 25, 125 · · Grinding wheel 26, 126 · · Servo motor 27, 127 · · · Feed screw 28, 128 · · · Feed nut 29, 129 · · · Grinding wheel correction device 31 , 131
..Wheelstone correction tool 32..Wheelstone correction tool table 33,13
3 ··· Arc guide 34, 134 · · Angle scale 3
5,135-reader 36,136-worm wheel segment 37,137-worm 38,
138 ··· Shaft 39,139 ··· Bearing 41,141 ·
・ Lead angle adjustment handle 43 ・ ・ Encoder 44 ・
· Numerical control unit 51 · · Guide 52 · · Saddle 53
..Swivel slide 54.Screw feeder 55.
・ Micrometer device 56 ・ ・ Z axis handle 57 ・
・ Warm wheel segment 58 ・ ・ Warm 59
..Warm shaft 61.Bearing 62.Handle 6
3. Angle scale 64 Angle reader 71 Replacement gear box 72 Bearing 73 V block 74
・ Receipt.

Claims (7)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 長尺の加工物の回転と研削砥石と加工物
の軸方向の相対移動の割合を一定にするねじ研削送り手
段を備えたねじ研削盤において、機台と、機台上に往復
動自在に備えたテーブルと、テーブルの駆動装置と、テ
ーブル上にテーブルの往復動方向に平行な線上に対向し
て備えた加工物主軸台及び心押台と、加工物の両側にお
いて夫々機台上に加工物の中心線を通り機台に対して垂
直な垂直軸心を旋回中心とする旋回位置調整装置を介し
て支持された二つのスライドと、主軸台と心押台にて支
持した加工物の中心線が前記垂直軸心で通る位置とほぼ
同一位置の加工物の両側において加工物に向って進退自
在にスライドに備えた対向する二つの砥石台と、砥石台
の駆動装置とを備えた対向砥石台を備えたねじ研削盤。
1. A screw grinder provided with a screw grinding feed means for making a ratio of rotation of a long workpiece and relative movement of a grinding wheel and a workpiece in an axial direction constant, a machine base and a machine base. and reciprocating freely with tables, and a drive device of the table, and the workpiece headstock and tailstock with opposite parallel line to the reciprocating direction of the table on the table, you on both sides of the workpiece
On each machine , passing through the center line of the workpiece
Two slides supported via a turning position adjustment device having a vertical vertical axis as a rotation center, and a position where the center line of the workpiece supported by the headstock and the tailstock passes through the vertical axis. A screw grinding machine comprising two opposed wheel heads provided on a slide so as to be able to advance and retreat toward a workpiece on both sides of a workpiece at the same position, and an opposed wheel head provided with a driving device of the wheel head.
【請求項2】 長尺の加工物の回転と研削砥石と加工物
の軸方向の相対移動の割合を一定にするねじ研削送り手
段を備えたねじ研削盤において、機台と、機台上に往復
動自在に備えたテーブルと、テーブルの駆動装置と、テ
ーブル上にテーブルの往復動方向に平行な線上に対向し
て備えた加工物主軸台及び心押台と、加工物の両側の加
工物から離れた位置において夫々機台上に加工物の軸方
向についての位置を調節可能に設けられたサドルと、機
台に対して垂直な垂直軸心を旋回中心として旋回位置を
調整可能にサドルに設けられた二つのスイベルスライド
と、主軸台と心押台にて支持した加工物のほぼ同一位置
の加工物の両側においてスイベルスライド上に加工物に
向って進退自在に備えた対向する二つの砥石台と、砥石
台の駆動装置とを備えた対向砥石台を備えたねじ研削
盤。
2. A screw grinding machine provided with a thread grinding feed means for making a ratio of rotation of a long workpiece and relative movement of a grinding wheel and a workpiece in an axial direction constant, a machine base and a machine base. A table provided reciprocally, a table driving device, a workpiece headstock and a tailstock provided on the table so as to face a line parallel to the reciprocating direction of the table, and workpieces on both sides of the workpiece. A saddle that is provided on the machine base at a position away from the machine so that the position of the workpiece in the axial direction can be adjusted, and a saddle that can adjust the turning position with the vertical axis perpendicular to the machine as the center of rotation Two swivel slides provided, and two opposing grinding wheels provided on the swivel slide on both sides of the workpiece at substantially the same position of the workpiece supported by the headstock and the tailstock so as to be able to advance and retreat toward the workpiece. And a drive unit for the grinding wheel head. Screw grinder equipped with a facing wheel head.
【請求項3】 砥石台の後退位置における砥石に作用す
る砥石修正装置を備え、各砥石の加工物に対する作用位
置と反対側の位置に砥石修正工具を配設したことを特徴
とする請求項1又は2に記載の対向砥石台を備えたねじ
研削盤。
3. A grindstone correcting device which acts on a grindstone at a retracted position of a grindstone base, and a grindstone correcting tool is disposed at a position opposite to a position where each grindstone acts on a workpiece. Or a screw grinder provided with the opposed grinding wheel stand according to 2.
【請求項4】 両砥石台は夫々加工物に向って進退する
スライド上に設けられ、スライドはねじ送り装置を介し
て数値制御装置により駆動されるサーボモータにより駆
動されることを特徴とする請求項1又は2もしくは3に
記載の対向砥石台を備えたねじ研削盤。
4. The apparatus according to claim 1, wherein each of the two wheel heads is provided on a slide that advances and retreats toward the workpiece, and the slide is driven by a servomotor driven by a numerical controller via a screw feeder. Item 4. A screw grinder provided with the opposed grindstone head according to Item 1, 2 or 3.
【請求項5】 両砥石台の砥石回転方向が同方向である
ことを特徴とする請求項1から4の何れか1つに記載の
対向砥石台を備えたねじ研削盤。
5. The screw grinding machine according to claim 1, wherein the grinding wheels rotate in the same direction.
【請求項6】 両砥石台の砥石回転方向が互いに逆方向
であることを特徴とする請求項1から4の何れか1つに
記載の対向砥石台を備えたねじ研削盤。
6. The screw grinder according to claim 1, wherein the rotating directions of the grinding wheels are opposite to each other.
【請求項7】 両砥石台の砥石台に備えた砥石駆動用の
主電動機は少なくともその一つが正逆転可能であること
を特徴とする請求項1から4の何れか1つに記載の対向
砥石台を備えたねじ研削盤。
7. The opposed grindstone according to claim 1, wherein at least one of the grindstone driving main motors provided on the grindstone heads of the two grindstone heads is capable of normal and reverse rotation. Screw grinder with table.
JP3047484A 1991-02-20 1991-02-20 Screw grinder with opposed wheel head Expired - Lifetime JP3046370B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3047484A JP3046370B2 (en) 1991-02-20 1991-02-20 Screw grinder with opposed wheel head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3047484A JP3046370B2 (en) 1991-02-20 1991-02-20 Screw grinder with opposed wheel head

Publications (2)

Publication Number Publication Date
JPH0647621A JPH0647621A (en) 1994-02-22
JP3046370B2 true JP3046370B2 (en) 2000-05-29

Family

ID=12776404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3047484A Expired - Lifetime JP3046370B2 (en) 1991-02-20 1991-02-20 Screw grinder with opposed wheel head

Country Status (1)

Country Link
JP (1) JP3046370B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482669A (en) * 1984-01-19 1984-11-13 Massachusetts Institute Of Technology Preceramic organosilazane polymers
JP4255662B2 (en) * 2002-08-27 2009-04-15 Thk株式会社 Thread grinding machine
KR101434017B1 (en) * 2012-06-11 2014-08-25 주상규 Method for cutting thread part on screw for catapult and extruding machine

Also Published As

Publication number Publication date
JPH0647621A (en) 1994-02-22

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