JPH02212056A - Centerless grinder - Google Patents
Centerless grinderInfo
- Publication number
- JPH02212056A JPH02212056A JP3051189A JP3051189A JPH02212056A JP H02212056 A JPH02212056 A JP H02212056A JP 3051189 A JP3051189 A JP 3051189A JP 3051189 A JP3051189 A JP 3051189A JP H02212056 A JPH02212056 A JP H02212056A
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- blade
- center
- grindstone
- work
- 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.)
- Granted
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 230000008707 rearrangement Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は芯なし研削盤、特に長尺の加工物をインフィー
ド研削する芯なし研削盤に関する。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a centerless grinding machine, and particularly to a centerless grinding machine for infeed grinding of a long workpiece.
「従来の技術」
例えば細長い磨きシャフトを研削して製作する場合は、
予め素材の曲りをとってあっても曲り取りは完全に行う
のは難かしく、曲りが残っている。このまま通常のイン
フィードで芯なし研削すると研削中素材は躍る。このた
め、第６図（ａ）に示すように加工物Ｗの中心ＯＷを研
削砥石１の中心０１と調整車２の中心０２を結ぶ線でｒ
Ｊ１＝Ｘよりもａだけ下げて加工物Ｗをワークレストの
ブレード３で支持し、調整車２及び又は研削砥石１をＸ
方向に加工物Ｗに向って切込んで粗研削する。例えば加
工物Ｗの直径を２５ｍとすると加工物Ｗの中心ＯＷを中
心線Ｘから下げる寸法ａ ＝ ６ ｔｍ程度である。粗
研削後、調整車２及び又は研削砥石１を後退して第６図
（ｂ）に示すようにワークレストのブレード３をワーク
Ｗの中心ＯＷが中心線Ｘよりもｂだけ上方に来るように
セットし、調整車２及び又は研削砥石１を切込んで加工
物Ｗを仕上研削する。``Conventional technology'' For example, when manufacturing a long and slender polished shaft by grinding,
Even if the material is bent in advance, it is difficult to remove the bend completely, and some bends remain. If you perform centerless grinding with normal infeed, the material will jump during grinding. Therefore, as shown in FIG. 6(a), the center OW of the workpiece W is r
J1=The workpiece W is supported by the blade 3 of the work rest by a lower than X, and the adjusting wheel 2 and/or grinding wheel 1 is lowered by
Rough grinding is performed by cutting in the direction toward the workpiece W. For example, if the diameter of the workpiece W is 25 m, the distance a which lowers the center OW of the workpiece W from the center line X is approximately 6 tm. After rough grinding, the adjusting wheel 2 and/or the grinding wheel 1 are moved back and the blade 3 of the work rest is moved so that the center OW of the work W is above the center line X by an amount b, as shown in FIG. 6(b). The workpiece W is then finished ground by cutting with the adjusting wheel 2 and/or the grinding wheel 1.
或は上記粗研削に続いてブレード３をそのま＼にして切
込み速度のみを遅くして仕上研削している。Alternatively, after the rough grinding described above, finish grinding is performed by leaving the blade 3 as is and reducing only the cutting speed.
「発明が解決しようとする課題」
従来のワークレストを研削砥石１と調整車２可へ進退さ
せる装置はねじ送り装置であり、粗研削後仕上研削番こ
移る前に別途手動で上下していた。そのため、研削盤を
停止し、研削盤の外装カバーを開放してワークレストの
ねじ送り装置を操作しなければならず手数のか＼るもの
である。これを回避するため芯なし研削盤を粗研削用、
仕上研削用に分けると芯なし研削盤が２台必要となる不
都合があった。又、−台の芯なし研削盤で複数本の加工
物Ｗの粗研削のみをまとめて行ない、段取善後にまとめ
て仕上研削も行うことができるが段取替の必要があり、
多種中量生産化は適当でない。``Problem to be solved by the invention'' The conventional device for advancing and retracting the work rest from the grinding wheel 1 and the adjustment wheel 2 is a screw feeding device, which was manually moved up and down after rough grinding and before moving on to finish grinding. . Therefore, it is necessary to stop the grinding machine, open the outer cover of the grinding machine, and operate the screw feeding device of the work rest, which is a hassle. To avoid this, we use a centerless grinder for rough grinding.
There was an inconvenience that two centerless grinders would be required if separated for finish grinding. In addition, it is possible to carry out only rough grinding of multiple workpieces W at once using a centerless grinding machine with a -base, and also perform finish grinding at once after the setup has been completed, but it is necessary to change the setup.
High-variety, medium-volume production is not appropriate.
そこで後者のよう化ブレード３の高さを下げたま＼で切
込速度を小さく研削した場合調整車２が加工物Ｗ１こ回
転を与えるため加える切線力化より、加工物Ｗは研削砥
石１と調整車２間に持上げられ、くさび状の研削砥石１
と調整車２間の表面に押込まれるので研削砥石１により
、大きな切込みを与えられる結果となりたとえ切込み速
度を遅くしても加工物Ｗの寸法精度、面粗度の向上は難
しい。Therefore, in the latter case, when grinding is carried out at a small cutting speed while the height of the grinding blade 3 is lowered, the workpiece W is adjusted with the grinding wheel 1 due to the cutting force applied by the adjustment wheel 2 to give rotation to the workpiece W1. A wedge-shaped grinding wheel 1 is lifted between two wheels.
Since it is pushed into the surface between the adjusting wheel 2 and the grinding wheel 2, a large cutting depth is applied by the grinding wheel 1, and even if the cutting speed is reduced, it is difficult to improve the dimensional accuracy and surface roughness of the workpiece W.
本発明は上記従来のインフィード送りによる芯なし研削
盤における課題を解決し、段取替しないで且つ加工物の
面粗度の向上を計ることのできる芯なし研削盤を提供す
ることを目的とする０
「課題を解決するための手段」
本発明は調整車、研削砥石、ワークレストを備えた芯な
し研削盤において、ワークレストを調整車と研削砥石間
に向って進退させる送り装置を設け、ワークレストの送
り装置と調整車及び又は研削砥石の切込み装置を関連動
作させる制御装置を設けたことを特徴とする芯なし研削
盤である。The purpose of the present invention is to solve the above-mentioned problems with the conventional centerless grinding machine using in-feed feeding, and to provide a centerless grinding machine that can improve the surface roughness of the workpiece without changing the setup. 0 "Means for Solving the Problems" The present invention provides a centerless grinding machine equipped with an adjustment wheel, a grinding wheel, and a work rest, which includes a feeding device that advances and retreats the work rest toward between the adjustment wheel and the grinding wheel, This is a centerless grinding machine characterized by being provided with a control device for operating a work rest feeding device, an adjusting wheel, and/or a cutting device of a grinding wheel in a related manner.
「実施例」
以下、本発明の実施例を図面に従って説明する。第１図
は正面図である。研削砥石１、調整車２の外周が対向す
るように配設されている。"Embodiments" Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a front view. The grinding wheel 1 and the adjusting wheel 2 are arranged so that their outer circumferences face each other.
研削砥石１は砥石主軸４に取付けられ、砥石主軸４は図
示されない軸受により砥石台５に回転自在に支持され、
図示されない電動機により図示矢印イの方向へ駆動さ、
れるようになっている。砥石台５は機台６の案内７によ
り水平方向に案内されている。砥石台５は切込み装置に
連結されている。この切込み装置はねじ送り装置８と送
りモータ９とからなっている。即ち、ねじ送り装置８は
砥石台５に固定した砥石台送りナツト１１と、該送りナ
ツト１１にねじ込まれ、軸方向不動に軸受１２に支持さ
れた送りねじ１３とからなっている。軸受１２は機台６
に固定されている。送りモータ９はパルスモータ或はＤ
Ｃモータであり、その出力軸は送りねじ１！に連結され
ている。The grinding wheel 1 is attached to a grinding wheel main shaft 4, and the grinding wheel main shaft 4 is rotatably supported on a grinding wheel head 5 by a bearing (not shown).
Driven by an electric motor (not shown) in the direction of arrow A shown in the drawing,
It is now possible to The grindstone head 5 is guided in the horizontal direction by a guide 7 of the machine stand 6. The grindstone head 5 is connected to a cutting device. This cutting device consists of a screw feed device 8 and a feed motor 9. That is, the screw feed device 8 includes a grindstone feed nut 11 fixed to the grindstone head 5, and a feed screw 13 screwed into the feed nut 11 and supported by a bearing 12 so as not to move in the axial direction. The bearing 12 is the machine base 6
Fixed. The feed motor 9 is a pulse motor or D
It is a C motor, and its output shaft is the feed screw 1! is connected to.
調整車２は調整車軸１４に固定され、調整車軸１４は図
示されない軸受−こより調整車台１５に回転自在に支持
され、図示されない電動機により図示矢印口の方向へ駆
動されるようになっている。調整車台１５は機台６の案
内１６により水平方向に案内されている。砥石主軸４の
中心０１と調整車軸１４の中心０２を結ぶ１ｓＸと砥石
主軸４、調整車軸１４の移動方向は一致している。調整
車台１５は切込み装置に連結されている。この切込み装
置はねじ送り装置１７と送りモータ１８からなっている
０即ち、ねじ送り装置１７は調整車台１５に固定された
送りナツト１９と、該送りナツト１９にねじ込まれ、軸
方向不動に軸受２目こ支持された送りねじ２２とからな
っている。軸受２１は機台６に固定されている。送りモ
ータ１８はパルスモータ或はＤＣモータであり、その出
力軸は送りねじ２２化連結されている。The adjustment wheel 2 is fixed to an adjustment axle 14, and the adjustment axle 14 is rotatably supported by an adjustment chassis 15 through a bearing (not shown), and is driven in the direction of the arrow shown by an electric motor (not shown). The adjustment chassis 15 is guided in the horizontal direction by guides 16 of the machine chassis 6. 1sX connecting the center 01 of the grindstone main shaft 4 and the center 02 of the adjustment axle 14 coincides with the moving direction of the grindstone main shaft 4 and the adjustment axle 14. The adjustment chassis 15 is connected to the cutting device. This cutting device consists of a screw feed device 17 and a feed motor 18. That is, the screw feed device 17 has a feed nut 19 fixed to the adjustment chassis 15, and a bearing 2 which is screwed into the feed nut 19 and fixed in the axial direction. It consists of a feed screw 22 that is visually supported. The bearing 21 is fixed to the machine base 6. The feed motor 18 is a pulse motor or a DC motor, and its output shaft is connected to a feed screw 22.
上端番ζブレード３を備えるワークレスト１０は機台６
＃こ設けられている。ワークレスト１０は機台６にハウ
ジング２３が固定され、ハウジングのキー溝２４付の円
筒孔にスリーブ２５が滑合しており、スリーブ２５に固
定されたキー２６は前記のキー溝２４に滑合していて、
スリーブ２５ζこはねじ送り装置が連結されている。The work rest 10 equipped with the upper end number ζ blade 3 is attached to the machine base 6
#This is provided. In the work rest 10, a housing 23 is fixed to the machine base 6, a sleeve 25 is slidably fitted into a cylindrical hole with a key groove 24 in the housing, and a key 26 fixed to the sleeve 25 is slidably fitted into the key groove 24. I'm doing it,
A screw feeding device is connected to the sleeve 25ζ.
ねじ送り装置はスリーブ２５の中心に切られためねじ２
５ａにねじ込まれた送りねじ２７がハウジング２３に固
定された軸受カバー２８４こ軸承されたものである０軸
受カバー２８に固定された送りモータ２９の出力軸は送
りねじ２７に連結されている。ハウジング２３に固定し
た油圧シリンダ３１のピストンロッドはハウジング２６
を半径方向に貫通しており、スリーブ２５を押圧してス
リーブ２５を固定できるようになっている。そして、ス
リーブ２５は停止後、直ちに油圧シリンダ３１により固
定され、移動開始直前に固定を解除される。送りモータ
２９はパルスモータ或はＤＣモータであり、その出力軸
は送りねじ２７に連結されている。The screw feeding device has an internal thread 2 cut in the center of the sleeve 25.
The output shaft of a feed motor 29 is connected to the feed screw 27, which is fixed to a bearing cover 28, in which the feed screw 27 screwed into the housing 23 is supported by a bearing cover 284. The piston rod of the hydraulic cylinder 31 fixed to the housing 23 is connected to the housing 26
The sleeve 25 is penetrated in the radial direction so that the sleeve 25 can be fixed by pressing the sleeve 25. Immediately after the sleeve 25 is stopped, it is fixed by the hydraulic cylinder 31, and the fixation is released immediately before the movement starts. The feed motor 29 is a pulse motor or a DC motor, and its output shaft is connected to the feed screw 27.
第２図は第１図の一部平面図である。調整車軸１４は第
２図の調整車軸１４を含む紙面に直交する垂直面内にお
いて砥石主軸４に対してわずかに傾きが与えられており
、これによって運転中加工物Ｗがストッパδ２の方向へ
移動し加工物Ｗの軸方向の位置が一定するようになって
いる。FIG. 2 is a partial plan view of FIG. 1. The adjustment axle 14 is slightly tilted with respect to the grinding wheel main shaft 4 in a vertical plane perpendicular to the plane of the paper including the adjustment axle 14 in FIG. 2, so that the workpiece W moves in the direction of the stopper δ2 during operation. Therefore, the axial position of the workpiece W is kept constant.
研削砥石１、調整車２の切込み装置及びワークレスト１
０の送り装置を関連動作させるため砥石台用の送りモー
タ９、調整台用の送りモータ１８、ワークレスト用の送
りモータ２９はサーボアンプ５ｇ、３４．！５を介して
ＣＮＣ制御又はプログラムコントロールにより研削サイ
クルを行う制御装置＆６に配線されている。Grinding wheel 1, cutting device of adjustment wheel 2 and work rest 1
The feed motor 9 for the grinding wheel head, the feed motor 18 for the adjustment table, and the feed motor 29 for the work rest are operated by servo amplifiers 5g, 34. ! 5 to a control device &6 which performs the grinding cycle by CNC control or program control.
以上説明した芯なし研削盤は研削砥石１、調整車２の両
車の台の調整動型の機械であるが、研削砥石１固定型、
調整車２固定量の機械であってもよい。本集施例では
（１）調整車台１５を固定しておいて砥石台用送すモー
タ９、ワークレスト用送りモータ２９のみを制御し、連
続又は連続及び間欠運動の組合せにより、ワークレスト
１Ｇと砥石台５を制御する方法。The centerless grinding machine described above is an adjustable type machine with a grinding wheel 1 and an adjustment wheel 2, but the grinding wheel 1 is fixed type,
It may be a machine with two fixed adjustment wheels. In this example, (1) the adjustment chassis 15 is fixed and only the grindstone feed motor 9 and the work rest feed motor 29 are controlled, and the work rest 1G is controlled continuously or by a combination of continuous and intermittent movements. A method of controlling the grindstone head 5.
（２）上記（１）に調整台用送りモータ１８の送りを加
えて制御する方法（加工物Ｗの大きさ、研削しるにより
）。(2) A method of controlling by adding the feed of the adjustment table feed motor 18 to the above (1) (depending on the size of the workpiece W and the grinding process).
で研削が行われる。Grinding is done in
全体の作用を説明する前に砥石１、調整車２、ブレード
δの運動方法ｌこついてのべると、制御装置！５６の指
令によりサーボアンプ３３を介して砥石台用送りモータ
９が附勢されると、送りねじ１６が回転し、送りナツト
１１は送られ、砥石台５は案内７に導かれて進退し、砥
石１はその中心０１が中心線Ｘ上を移動して進退する。Before explaining the overall operation, let me explain how the grinding wheel 1, adjusting wheel 2, and blade δ move. When the grindstone feed motor 9 is energized by the command 56 via the servo amplifier 33, the feed screw 16 rotates, the feed nut 11 is fed, and the grindstone head 5 is guided by the guide 7 to advance and retreat. The center 01 of the whetstone 1 moves on the center line X and advances and retreats.
制御装置＆６の指令によりサーボアンプδ４を介してワ
ークレスト用モータ２９が附勢されると、送りねじ２，
７が回転し、スリーブ２５はハウジング２！Ｉ中を上下
し、スリーブ２５に取付は取外し可能に設けたブレード
６は砥石１と調整車２の外周の対向面間に向って進退す
る。When the work rest motor 29 is energized via the servo amplifier δ4 by a command from the control device &6, the feed screw 2,
7 rotates, and the sleeve 25 becomes the housing 2! A blade 6, which moves up and down in I and is removably attached to the sleeve 25, advances and retreats between the opposing surfaces of the outer periphery of the grinding wheel 1 and the adjusting wheel 2.
制御装置３６の指令によりサーボアンプ３５を介して調
整車台用送すモータ１８が附勢されると送りねじ２２が
回転し、送りナツト１９は送られ、調整車台１５は案内
１６に導かれて進退し、調整車２はその中心０２が中心
線Ｘ上を移動して進退する。When the adjustment chassis feed motor 18 is energized via the servo amplifier 35 in response to a command from the control device 36, the feed screw 22 rotates, the feed nut 19 is sent, and the adjustment chassis 15 is guided by the guide 16 to move forward and backward. However, the center 02 of the adjusting wheel 2 moves on the center line X and moves back and forth.
制御装置３６はＣＮＣ制御或はプログラム制御により、
砥石台用送りモータ９、調整車台用送りモータ１゛８、
ワークレスト周速すモータ２９を関連動作させ、夫々の
送りモータは砥石１、調整車２、ブレード６を関連して
進退させる０
全体の作用は上記各動作を伴なって研削砥石１、調整車
２、ブレード６が移動するので以下の説明は研削砥石１
、調整車２、ブレード３及び加工物Ｗの動きに関した説
明とし、制御装置６６からの関連の説明は省略する。The control device 36 is controlled by CNC control or program control.
Feed motor 9 for grinding wheelhead, feed motor 1゛8 for adjustment wheel base,
The work rest circumferential speed motor 29 is operated in conjunction with each other, and the respective feed motors move the grinding wheel 1, adjusting wheel 2, and blade 6 forward and backward in conjunction with each other. 2. Since the blade 6 moves, the following explanation is based on the grinding wheel 1.
, the movement of the adjustment wheel 2, the blade 3, and the workpiece W will be explained, and the explanation related to the control device 66 will be omitted.
先ず前記した調整車台１５を固定し、砥石１、ブレード
６を関連動作させる場合についてのべる。このような動
作を行う加工は加工物Ｗの直径が大きくなく、取代と加
工物Ｗの曲りかや−大きい場合である。First, a case will be described in which the above-mentioned adjustment chassis 15 is fixed and the grindstone 1 and blade 6 are operated in conjunction with each other. Such operations are performed when the diameter of the workpiece W is not large and the machining allowance and curvature of the workpiece W are large.
第３図はタイムチャートであって横軸に時間、縦軸に砥
石１、ブレード６の位置を示している。FIG. 3 is a time chart in which the horizontal axis shows time and the vertical axis shows the positions of the grindstone 1 and blade 6.
時間ｔＯｌこおいてブレード６を上昇させ第６図の時間
ｔ１、ブレード位置にで停止させる。このブレード位置
には第４図（ａ）に示すようζこ加工物Ｗはブレードδ
の頂面の斜面と調整車２の外周に接しており、加工物Ｗ
の中心ＯＷが砥石中心０１と調整車中心０２を結ぶ中心
線Ｘよりもａだけ下った位置とする。例えば加工物Ｗの
直径を２０１１８とした場合ａ ＝ ６ ｔａｒである
。時間ｔ１において第４図（ａ）のように加工物Ｗから
離れている砥石１は急速前進に附勢され時間ｔ２Ｊこ第
６図の砥石位置人に達し、粗研削の切込み送り番こ切換
えられる。この砥石位置Ａは砥石１と加工物Ｗが近接し
た位置である。時間ｔ２から間もなく砥石１は加工物Ｗ
に切り込まれる。この時からブレード３は研削作用に併
せて第３図のブレード位置Ｌ（＝Ｋ）力１ら上昇を始め
る。回転方向は第４図（ａ）に示すよう薔こ砥石１は矢
印イ、調整車２は矢印口、加工物Ｗは矢印ハの方向に回
転する。時間ｔ２からｔδまでは粗研削であり、この研
削により加工物Ｗは調整車２が加工物Ｗを回転させる切
線力で加工物Ｗを持上げる力及び加工物Ｗの曲り等の不
整−状によりブレード墨頂面を基準に持ち上げられるカ
により、砥石１と調整車２の対向面に加工物Ｗは押し込
まれる傾向となり加工物Ｗは先ず曲り或は不整形による
中心から凸形部が研削されて行き、ついで全体が真円に
研削される。研削により、加工物Ｗの直径が小さくなる
と加工物Ｗの中心ＯＷが下って砥石中心０１と調整車中
心０２を結ぶ中心ｌｓＸから加工物中心ＯＷの距離ａが
大きくなろう、とするが上記ブレード３の上昇により、
一定に保たれる。そして時間ｔ６において、砥石１、ブ
レード６は移動を停止する（砥石１は第６図の砥石位置
Ｂ、ブレード３は第３図のブレード位置Ｍ）。ｃ−から
スパークアウトとなり時間ｔａｇこおいて終了すると、
砥石１は第６図の砥石位置Ｃ（＝Ｂ）から急速後退し時
間ｔＳ、第６図の砥石位置りにおいて急速前進して時間
ｔ６．第δ図の砥石位置Ｅにおいて仕上研削の切込み速
度に切り換えられる。一方時間ｔ４．第６図のブレード
位置Ｎからブレード６は急上昇して時間ｔ６に第３図の
ブレード位置Ｑに達する。時間ｔ６における状態は第４
図（町こ示される。図において加工物Ｗの中心ＯＷは砥
石中心０１と調整車中心０２を結ぶ中心ａＸよりもｂだ
け上方に来ている。この距離すは通常の芯なし研削１こ
おける値である。At time tOl, the blade 6 is raised and stopped at the blade position at time t1 in FIG. At this blade position, as shown in FIG. 4(a), the workpiece W has a blade δ.
The slope of the top surface of W is in contact with the outer periphery of the adjusting wheel 2, and the workpiece W
The center OW is located a distance a below the center line X connecting the grindstone center 01 and the adjustment wheel center 02. For example, when the diameter of the workpiece W is 20118, a = 6 tar. At time t1, the grinding wheel 1, which is away from the workpiece W as shown in FIG. 4(a), is energized to advance rapidly and reaches the grinding wheel position shown in FIG. 6 at time t2J, and the cutting feed number for rough grinding is changed. . This grindstone position A is a position where the grindstone 1 and the workpiece W are close to each other. Shortly after time t2, the grinding wheel 1 turns to the workpiece W.
is cut into. From this point on, the blade 3 begins to rise from the blade position L (=K) force 1 in FIG. 3 in conjunction with the grinding action. As shown in FIG. 4(a), the grindstone 1 rotates in the direction of arrow A, the adjustment wheel 2 rotates in the direction of arrow C, and the workpiece W rotates in the direction of arrow C. From time t2 to tδ is rough grinding, and by this grinding, the workpiece W is lifted by the force of the adjustment wheel 2 to lift the workpiece W with the tangential force that rotates the workpiece W, and due to irregularities such as bending of the workpiece W. The workpiece W tends to be pushed into the opposing surfaces of the grinding wheel 1 and the adjustment wheel 2 by the force that lifts the top surface of the blade as a reference, and the convex part of the workpiece W is first ground from the center due to bending or irregularity. Then, the whole thing is ground into a perfect circle. As the diameter of the workpiece W decreases due to grinding, the center OW of the workpiece W will move downward, and the distance a between the workpiece center OW and the center lsX connecting the grinding wheel center 01 and the adjusting wheel center 02 will increase. Due to the rise of 3,
is kept constant. Then, at time t6, the grindstone 1 and the blade 6 stop moving (the grindstone 1 is at the grindstone position B in FIG. 6, and the blade 3 is at the blade position M in FIG. 3). When sparking out from c- and ending after the time tag,
The grindstone 1 rapidly retreats from the grindstone position C (=B) in FIG. 6 at time tS, and rapidly advances at the grindstone position shown in FIG. 6 at time t6. At the grindstone position E in Fig. δ, the cutting speed is switched to the finish grinding speed. On the other hand, time t4. The blade 6 rapidly rises from the blade position N in FIG. 6 and reaches the blade position Q in FIG. 3 at time t6. The state at time t6 is the fourth
In the figure, the center OW of the workpiece W is located above the center aX connecting the grinding wheel center 01 and the adjusting wheel center 02 by a distance b. It is a value.
時間ｔ６においてブレードδは停止し、間もなく砥石１
は加工物Ｗに切込まれる。この切込み速度は仕上研削用
であって粗研削時よりも遅い。At time t6, the blade δ stops, and soon the grinding wheel 1
is cut into the workpiece W. This cutting speed is for finish grinding and is slower than that for rough grinding.
時間ｔ７、＠δ図の砥石位置Ｆにおいて砥石１は前進を
停止する。ブレード３は停止したま＼である（第６図の
ブレード位置Ｒ（＝Ｑ））。時間ｔ７からｔ８までのス
パークアウトが行われ、・時間ｔ８、第３図の砥石位置
Ｇ（＝Ｆ）、ブレード位置８（＝Ｒ）から夫々急速後退
し、砥石１、ブレード６は原位置番と戻゛る（時間ｔ９
）。以上によって連続して粗研削、仕上研削が行われ、
夫々粗研削に適当な加工物Ｗの位置暑とおいて研削され
、加工物Ｗの加工時間が短かく、且つ良好な精度が得ら
れる。At time t7, the grindstone 1 stops moving forward at the grindstone position F in the diagram @δ. The blade 3 remains stopped (blade position R (=Q) in FIG. 6). Spark-out is performed from time t7 to t8, and at time t8, the grindstone 1 and blade 6 rapidly retreat from the grindstone position G (=F) and the blade position 8 (=R) in FIG. (time t9)
). Through the above steps, rough grinding and finish grinding are performed continuously.
Each of the workpieces W is ground at a position suitable for rough grinding, so that the machining time of the workpiece W is short and good accuracy is obtained.
加工物Ｗの直径、曲り、研削代によっては（曲り、研削
代の小さい場合）上記において時間ｔ１から時間ｔ４ま
での間ブレード６の位置を第６図のブレード位置Ｋ ｆ
）ｈらＭまでの間の一定位置において時間ｔ４から時間
ｔ６までブレード６を急上昇し時間１６４ζおいて第６
図のブレード位置Ｑ。Depending on the diameter, bending, and grinding allowance of the workpiece W (when the bending and grinding allowance are small), the position of the blade 6 from time t1 to time t4 in the above may be changed to the blade position Kf in FIG.
) At a constant position between h and M, the blade 6 is rapidly moved from time t4 to time t6, and at time 164ζ, the blade 6 is
Blade position Q in the figure.
第４図（ｂ）の状態とすることができる。The state shown in FIG. 4(b) can be achieved.
次に加工物Ｗの直径が大きく、研削代が大きい（素材の
真直度、表面粗度が良好でない場合）には調整車２の進
退を加える〇
前記方法で研削すると、第５図（ａ）に°示すように研
削開始時１こ砥石中心０１と調整車中心０２を結ぶ中心
線Ｘよりも距離ａだけ加工物中心ＯＷが下っていても、
ブレード６の上昇により加工物中心ＯＷと中心線Ｘとの
距離ａは保たれる。Next, when the diameter of the workpiece W is large and the grinding allowance is large (if the straightness and surface roughness of the material are not good), the adjusting wheel 2 is moved back and forth. If the workpiece is ground using the above method, as shown in Fig. 5 (a) As shown in °, even if the workpiece center OW is lower than the center line X connecting the grindstone center 01 and the adjustment wheel center 02 by a distance a when grinding starts
By raising the blade 6, the distance a between the workpiece center OW and the center line X is maintained.
然し、当初加工物Ｗとブレード乙の接触点Ｐ１は第５図
番）に示すようにＰ２となる。接触点Ｐ１とＰ２とは水
平方向に距離Ｃだけ離れる。この距離Ｃが大きくなると
加工物Ｗの支持条件が変化し、調整車２の加工物Ｗを回
転させる作用における滑りが変化し、加工物Ｗが所望の
回転速度の許容範囲を離れてしまう又、ブレード３が研
削砥石１により研削されてしまう場合が生じ得る。そこ
で第６図にＨ−Ｉ−Ｊ線で示すように調整車２の位置を
変える。即ち、時間ｔ２より間もなく砥石１が加工物Ｗ
に作用し始めると第６図の調整車位置Ｈにあった調整車
２を前進させると共にブレード３を上昇し、加工物の中
心ＯＷを砥石中心０１と調整車中心０２を結ぶ中心線Ｘ
よりも距離ａだけ下げ且つブレード３と加工物Ｗの接触
点の水平方向位置をほぼ同一位置に保つ、そして時間ｔ
３のスパークアウトに入る第３図の調整車位置Ｉにおい
て調整車２を停止すると共に第３図のブレード位置Ｍに
おいてブレード６を停止する。その他の点においては前
記した第１の研削方法と同じである。However, the initial contact point P1 between the workpiece W and the blade B becomes P2 as shown in Figure 5). Contact points P1 and P2 are separated by a distance C in the horizontal direction. When this distance C increases, the supporting conditions of the workpiece W change, the slippage in the action of rotating the workpiece W of the adjustment wheel 2 changes, and the workpiece W leaves the desired rotational speed tolerance range. A case may occur where the blade 3 is ground by the grinding wheel 1. Therefore, the position of the adjusting wheel 2 is changed as shown by line H-I-J in FIG. That is, shortly after time t2, the grinding wheel 1 touches the workpiece W.
When the wheel begins to act on the wheel, the adjustment wheel 2, which was at the adjustment wheel position H in FIG.
, and keep the horizontal position of the contact point between the blade 3 and the workpiece W at almost the same position, and for a time t.
The adjusting wheel 2 is stopped at the adjusting wheel position I shown in FIG. 3, where the spark-out occurs in step 3, and the blade 6 is stopped at the blade position M shown in FIG. 3. In other respects, this method is the same as the first grinding method described above.
本発明は以上のとおり、ブレードを研削砥石と調整車の
対向面に向って進退するようにし、砥石及び又は調整車
の進退と前記ブレードの進退を関連動作できる構成とし
たため、
（１）粗研削、仕上研削を引続き行うことが出来、研削
状態に応じてブレードと加工物の接触位置、調整車と加
工物の接触位置、砥石面の加工物への作用位置を逐次調
整可能なため、最適な芯なし研削を行うことができる０
（２） 加工物の曲り、研削代、加工物径等に応じて
加工物位置を最適位置と出来るから、研削時間が早く研
削精度にすぐれる。As described above, the present invention has a configuration in which the blade moves forward and backward toward the opposing surface of the grinding wheel and the adjustment wheel, and the movement of the grinding wheel and/or adjustment wheel and the movement of the blade can be performed in conjunction with each other. (1) Rough grinding , finish grinding can be continued, and the contact position of the blade and workpiece, the contact position of the adjustment wheel and workpiece, and the position of action of the grinding wheel surface on the workpiece can be adjusted sequentially depending on the grinding condition, so the optimal Centerless grinding is possible (2) The workpiece can be placed at an optimal position depending on the bending of the workpiece, grinding allowance, diameter of the workpiece, etc., resulting in faster grinding time and excellent grinding accuracy.
第１図は本発明の実施例の正面図、第２図は第１図の一
部平面図、第３図は第１図の実施例の作用例を示すタイ
ムチャート、第４図（ａ）、第４図（ｂ）、第５図（ａ
）、第５図（ｂ）は作用を説明するための正面図、第６
図（ａ）、第６図（ｂ）は従来例の説明図である。
１・・研削砥石 ２・・調整車 ６・・ブレード ４・
・砥石主軸 ５・・砥石台 ６・機台 ７・・案内 ８
・・ねじ送り装置 ？・・送りモータ １０・・ワーク
レスト １１・砥石台送りナツト １２・・軸受 １６
・・送りねじ １４・・調整車軸 １５・・調整車台
１６・・案内 １７・・ねじ送り装置１８・・モータ
１９・・送りナツト ２１Φ軸受 ２２・・送りねじ
２６・・ハウジング ２４・・キー溝 ２５・・スリー
ブ ２５ａ・めねじ ２６・・キー ２７・・送りねじ
２８・・軸受カバー ２９・・送りモータ３１ ・油圧
シリンダ ６２・・ストッパＭＢ、５４，５５・・サー
ボアンプ ｓ６・・制御装置。
特許出願人 株式会社 日平トヤマFIG. 1 is a front view of the embodiment of the present invention, FIG. 2 is a partial plan view of FIG. 1, FIG. 3 is a time chart showing an example of the operation of the embodiment of FIG. 1, and FIG. 4(a) , Fig. 4(b), Fig. 5(a)
), FIG. 5(b) is a front view for explaining the action, and FIG.
FIG. 6(a) and FIG. 6(b) are explanatory diagrams of a conventional example. 1. Grinding wheel 2. Adjustment wheel 6. Blade 4.
・Whetstone spindle 5・・Whetstone stand 6・Machine stand 7・・Guide 8
...Screw feeding device?・・Feed motor 10・・Work rest 11・Wheelhead feed nut 12・・Bearing 16
・・Feed screw 14・・Adjustment axle 15・・Adjustment chassis
16...Guide 17...Screw feeding device 18...Motor
19...Feed nut 21Φ bearing 22...Feed screw
26..Housing 24..Keyway 25..Sleeve 25a.Female thread 26..Key 27..Feed screw 28..Bearing cover 29..Feed motor 31..Hydraulic cylinder 62..Stopper MB, 54, 55.・Servo amplifier s6...control device. Patent applicant Nippei Toyama Co., Ltd.
Claims (1)
削盤において、ワークレストを調整車と研削砥石間に向
つて進退させる送り装置を設け、ワークレストの送り装
置と調整車及び又は研削砥石の切込み装置を関連動作さ
せる制御装置を設けたことを特徴とする芯なし研削盤。1. In a centerless grinding machine equipped with an adjusting wheel, a grinding wheel, and a work rest, a feeding device for moving the work rest forward and backward between the adjusting wheel and the grinding wheel is provided, and the feeding device of the work rest, the adjusting wheel, and/or the grinding wheel A centerless grinding machine characterized by being provided with a control device for operating a cutting device in conjunction with the cutting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1030511A JP2910016B2 (en) | 1989-02-09 | 1989-02-09 | Centerless grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1030511A JP2910016B2 (en) | 1989-02-09 | 1989-02-09 | Centerless grinding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02212056A true JPH02212056A (en) | 1990-08-23 |
| JP2910016B2 JP2910016B2 (en) | 1999-06-23 |
Family
ID=12305836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1030511A Expired - Fee Related JP2910016B2 (en) | 1989-02-09 | 1989-02-09 | Centerless grinding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2910016B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010097296A (en) * | 2000-04-21 | 2001-11-08 | 임성순 | Material supporting construction for centerless grinder |
| US6729938B2 (en) | 2000-05-29 | 2004-05-04 | Koyo Machine Industries Co., Ltd. | Centerless grinding machine |
| CN103639855A (en) * | 2013-12-31 | 2014-03-19 | 梧州市三禾添佰利五金加工有限公司 | Improved grinding device of centerless grinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5039879A (en) * | 1973-08-13 | 1975-04-12 | ||
| JPS5430593A (en) * | 1977-08-10 | 1979-03-07 | Hitachi Ltd | Centerless grinding method |
| JPS59219139A (en) * | 1983-05-27 | 1984-12-10 | Toyoda Mach Works Ltd | Center height control device in centerless grinder |
| JPS6025640A (en) * | 1983-07-21 | 1985-02-08 | Toyoda Mach Works Ltd | Forming method of stepped shaft |
-
1989
- 1989-02-09 JP JP1030511A patent/JP2910016B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5039879A (en) * | 1973-08-13 | 1975-04-12 | ||
| JPS5430593A (en) * | 1977-08-10 | 1979-03-07 | Hitachi Ltd | Centerless grinding method |
| JPS59219139A (en) * | 1983-05-27 | 1984-12-10 | Toyoda Mach Works Ltd | Center height control device in centerless grinder |
| JPS6025640A (en) * | 1983-07-21 | 1985-02-08 | Toyoda Mach Works Ltd | Forming method of stepped shaft |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010097296A (en) * | 2000-04-21 | 2001-11-08 | 임성순 | Material supporting construction for centerless grinder |
| US6729938B2 (en) | 2000-05-29 | 2004-05-04 | Koyo Machine Industries Co., Ltd. | Centerless grinding machine |
| CN103639855A (en) * | 2013-12-31 | 2014-03-19 | 梧州市三禾添佰利五金加工有限公司 | Improved grinding device of centerless grinder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2910016B2 (en) | 1999-06-23 |
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