JP2000033565A - Contact position detection method for grinding wheel and device therefor - Google Patents
Contact position detection method for grinding wheel and device thereforInfo
- Publication number
- JP2000033565A JP2000033565A JP10202136A JP20213698A JP2000033565A JP 2000033565 A JP2000033565 A JP 2000033565A JP 10202136 A JP10202136 A JP 10202136A JP 20213698 A JP20213698 A JP 20213698A JP 2000033565 A JP2000033565 A JP 2000033565A
- Authority
- JP
- Japan
- Prior art keywords
- workpiece
- grindstone
- contact
- detecting
- contact position
- 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
Landscapes
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、砥石で被加工物
に研削加工を行う際の砥石が被加工物に接触する接触位
置を検出する砥石の接触位置検出方法およびその装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for detecting a contact position of a grindstone for detecting a contact position at which a grindstone comes into contact with a work when grinding the work with the grindstone.
【０００２】[0002]
【従来の技術】従来、研削用の砥石を回転させながら上
下方向に移動させ被加工物としてのワークに研削加工を
行う研削盤はよく知られている。この研削盤において砥
石とワークとの接触位置を検出する手段としては、砥石
面とワークとの接触時の火花や砥石軸に加わる電気的負
荷又は、砥石軸を下方向に移動させながら砥石面をワー
クに押し付けるときに発生する送りモータにかかる電気
的負荷を検出する方法が知られている。これらの検出方
法はいずれも安全で安定性のある検出方法ではなかっ
た。2. Description of the Related Art Conventionally, a grinding machine which moves a grinding wheel in the vertical direction while rotating to grind a workpiece as a workpiece is well known. As means for detecting the contact position between the grindstone and the work in this grinder, sparks at the time of contact between the grindstone surface and the work or an electric load applied to the grindstone shaft or the grindstone surface while moving the grindstone shaft in a downward direction are used. There is known a method of detecting an electric load applied to a feed motor generated when the feed motor is pressed against a work. None of these detection methods were safe and stable.
【０００３】さらに、砥石とワークとの接触位置を検出
する手段としては、例えば特開昭５９−１６６４６１号
公報などで知られているように、砥石とワークとの導通
を検出して行う方法も知られている。Further, as a means for detecting a contact position between a grindstone and a work, a method of detecting conduction between the grindstone and the work as disclosed in, for example, JP-A-59-166461 is also known. Are known.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上述した従
来の砥石とワークとの導通を単に検出して接触位置を検
出する検出方法では、砥石がワークに直接接触する時の
みを検出していると共に、砥石に含まれている導通性を
検出し、砥石の端面を検出しているとはかぎらない。ま
た研削時に使用している水分や研削カスを介して検出し
ている恐れもある。したがって、砥石とワークとの接触
位置にはそのときに応じて誤差が生じて、正確な接触位
置を検出できず、ひいては研削加工精度に影響を及ぼし
ていた。By the way, in the above-mentioned conventional detecting method for detecting the contact position by simply detecting the continuity between the grindstone and the work, only when the grindstone directly contacts the work is detected. However, it does not necessarily mean that the conductivity of the grindstone is detected and the end face of the grindstone is detected. In addition, there is a possibility that detection is performed via moisture or grinding waste used during grinding. Therefore, an error occurs in the contact position between the grindstone and the work at that time, and an accurate contact position cannot be detected, which in turn affects the grinding accuracy.
【０００５】この発明の目的は、砥石と被加工物との接
触位置を誤差を少なくして検出し、高精度な研削加工を
行い得るようにした砥石の接触位置検出方法およびその
装置を提供することにある。An object of the present invention is to provide a method and an apparatus for detecting a contact position of a grindstone capable of detecting a contact position between a grindstone and a workpiece with a reduced error and performing high-precision grinding. It is in.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に請求項１によるこの発明の砥石の接触位置検出方法
は、研削加工時における被加工物と砥石との接触位置を
検出する方法において、少なくとも導電性を有した砥石
を回転して被加工物に相対的に接近させ、被加工物と砥
石との接触による導通を検出し、上記導通が所定時間以
上継続したとき、又は予め設定された複数回目の導通を
検出したときに、その所定時間経過時の位置又は予め設
定された複数回目の導通検出位置を被加工物接触位置と
して検出することを特徴とするものである。According to a first aspect of the present invention, there is provided a method for detecting a contact position of a grindstone in a grinding process, comprising the steps of: At least rotate the grindstone having conductivity and relatively approach the workpiece, detect the conduction due to the contact between the workpiece and the grindstone, when the conduction has continued for a predetermined time or more, or a preset When a plurality of conductions are detected, a position at which a predetermined time has elapsed or a preset plurality of conduction detection positions is detected as a workpiece contact position.
【０００７】請求項４によるこの発明の砥石の接触位置
検出装置は、被加工物に対する導電性を有した回転可能
な砥石の相対的な位置を検出する位置検出手段と、被加
工物と砥石との接触を検出する接触検出手段と、この接
触検出手段による検出の通電時間が所定時間に達したか
否かを判別する第１判別手段又は被加工物と砥石との接
触による通電が予め設定された複数回行われたか否かを
判別する第２判別手段と、前記第１又は第２判別手段の
判別結果と前記位置検出手段の検出結果に基いて被加工
物に対する砥石の接触位置を求める接触位置演算手段
と、を備えてなることを特徴とするものである。According to a fourth aspect of the present invention, there is provided an apparatus for detecting a contact position of a grindstone with a position detecting means for detecting a relative position of a rotatable grindstone having conductivity with respect to a work, and a method of detecting the position of the work and the grindstone. Contact detection means for detecting the contact of the workpiece, and first determination means for determining whether or not the energization time of the detection by the contact detection means has reached a predetermined time, or energization by contact between the workpiece and the grindstone is preset. A second discriminating means for discriminating whether or not the operation has been performed a plurality of times; and a contact for obtaining a contact position of the grindstone with the workpiece based on a discrimination result of the first or second discriminating means and a detection result of the position detecting means. And a position calculating means.
【０００８】したがって、請求項１および４によるこの
発明の砥石の接触位置検出方法およびその装置では、少
なくとも導電性を有した砥石を回転せしめて被加工物に
相対的に接近せしめる。そして、砥石が被加工物に当接
して導通したことが位置検出手段で検出される。この導
通が所定時間以上継続したとき、又は予め設定された複
数回目の導通を検出したときに、その所定時間経過時の
位置又は予め設定された複数回目の導通検出位置を第１
又は第２判別手段で判別すると共に接触位置演算手段で
演算して被加工物接触位置とすることにより、この被加
工物接触位置は誤差が少なく検出されて被加工物に研削
精度良好な研削加工が行われる。Therefore, in the method and the apparatus for detecting a contact position of a grindstone according to the present invention according to claims 1 and 4, at least the grindstone having conductivity is rotated to relatively approach the workpiece. Then, it is detected by the position detecting means that the grindstone is brought into contact with the workpiece to be conducted. When this conduction has continued for a predetermined time or more, or when a plurality of preset conduction detections have been detected, the position at the elapse of the predetermined time or the preset plurality of conduction detection positions is set to the first position.
Alternatively, the workpiece contact position is determined by the second determination means and calculated by the contact position calculation means to obtain the workpiece contact position, so that the workpiece contact position is detected with a small error, and the workpiece is ground with good grinding accuracy. Is performed.
【０００９】請求項２によるこの発明の砥石の接触位置
検出方法は、研削加工時における被加工物と砥石との接
触位置を検出する方法において、導電性を有した砥石又
は被加工物の少なくとも一方を回転し、相対的に接近せ
しめ、砥石と被加工物との接触導通を複数個所において
検出し、最終検出位置を被加工物接触位置として検出す
ることを特徴とするものである。According to a second aspect of the present invention, there is provided a method for detecting a contact position of a grindstone, the method comprising: detecting at least one of a conductive grindstone and a workpiece. Are rotated to make them relatively close to each other, and contact conduction between the grindstone and the workpiece is detected at a plurality of locations, and the final detection position is detected as the workpiece contact position.
【００１０】請求項５によるこの発明の砥石の接触位置
検出装置は、被加工物に対する導電性を有する回転可能
な砥石の相対的な位置を検出する位置検出手段と、被加
工物と砥石との接触を検出する接触検出手段と、この接
触検出手段による検出の接触導通が複数個所における最
終個所であるか否かを判別する第３判別手段と、この第
３判別手段の判別結果と前記位置検出手段の検出結果に
基いて被加工物に対する砥石の接触位置を求める接触位
置演算手段と、を備えてなることを特徴とするものであ
る。According to a fifth aspect of the present invention, there is provided an apparatus for detecting a contact position of a grindstone with a grinding wheel, comprising: a position detecting means for detecting a relative position of a rotatable grindstone having conductivity with respect to a workpiece; Contact detecting means for detecting a contact, third determining means for determining whether or not the contact conduction detected by the contact detecting means is the last one of a plurality of places; a result of the determination by the third determining means; Contact position calculating means for obtaining a contact position of the grindstone with the workpiece based on a detection result of the means.
【００１１】したがって、請求項２および５のこの発明
の砥石の接触位置検出方法およびその装置では、導通性
を有した砥石又は被加工物の少なくとも一方を回転せし
めて砥石を被加工物に相対的に接触せしめる。そして、
砥石が被加工物に当接して導通したことが位置検出手段
で検出される。この検出を複数個所において検出し、最
終検出位置を第３判別手段で判別すると共に接触位置演
算手段で演算して被加工物接触位置とすることにより、
この被加工物接触位置は誤差が少なく検出されて被加工
物に研削精度良好な研削加工が行われる。Therefore, in the method and the apparatus for detecting a contact position of a grindstone according to the present invention, at least one of a grindstone having conductivity and a workpiece is rotated to move the grindstone relative to the workpiece. Contact. And
It is detected by the position detecting means that the grindstone is brought into contact with the workpiece to be conducted. This detection is detected at a plurality of locations, the final detection position is determined by the third determination means, and is calculated by the contact position calculation means to obtain the workpiece contact position.
The workpiece contact position is detected with a small error, and the workpiece is subjected to grinding with good grinding accuracy.
【００１２】請求項３によるこの発明の砥石の接触位置
検出方法は、請求項１又は２の砥石の接触位置検出方法
において、被加工物接触位置を検出するまで被加工物の
表面および砥石にエアを吹き付けることを特徴とするも
のである。According to a third aspect of the present invention, there is provided a method for detecting a contact position of a grindstone according to the first or second aspect, wherein air is applied to the surface of the workpiece and the grindstone until the contact position of the workpiece is detected. Is sprayed.
【００１３】請求項６によるこの発明の砥石の接触位置
検出方法は、請求項４又は５の砥石の接触位置検出装置
において、被加工物の表面および砥石にエアを吹き付け
るエア吹き付け手段を備えてなることを特徴とするもの
である。According to a sixth aspect of the present invention, there is provided a method for detecting a contact position of a grindstone according to the fourth or fifth aspect, further comprising air blowing means for blowing air to the surface of the workpiece and the grindstone. It is characterized by the following.
【００１４】したがって、請求項４および６によるこの
発明の砥石の接触位置検出方法およびその装置では被加
工物接触検出時に被加工物の表面および砥石にエア吹き
付け手段でエアを吹き付けることによって、被加工物の
表面が清掃されて、水分や研削カス等が除去されるの
で、砥石が被加工物に接触したことがより一層正確に検
出される。Therefore, in the method and the apparatus for detecting a contact position of a grindstone according to the present invention according to the fourth and sixth aspects, air is blown to the surface of the work and the grindstone by the air blowing means when the contact of the work is detected. Since the surface of the object is cleaned to remove moisture, grinding residue, and the like, it is possible to more accurately detect that the grinding wheel has come into contact with the workpiece.
【００１５】[0015]
【発明の実施の形態】以下、この発明の実施の形態を図
面に基いて詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１６】図１を参照するに、研削盤１は立設された
フレーム３を備えており、このフレーム３の前側（図１
において左側）には複数のガイドレール５が敷設されて
いる。このガイドレール５には複数のスライダ７を介し
てＬ字形状のＺ軸キャレッジ９がＺ軸方向（図１におい
て上下方向）へ移動可能に設けられている。このキャレ
ッジ９の垂直部９Ａにおける後部には前後方向（図１に
おいて水平方向）へ延伸したナット部材１１が設けられ
ており、このナット部材１１にはＺ軸方向へ延伸したボ
ールねじ１３が螺合されている。このボールねじ１３の
上部は前記フレーム３の上部に設けられた送りモータ１
５に連結されていると共に、前記ボールねじ１３の下部
はフレーム３に設けられた軸受１７に回転可能に支承さ
れている。前記送りモータ１５には位置検出手段の一例
としてのエンコーダ１９が備えられている。Referring to FIG. 1, the grinding machine 1 includes a frame 3 which is erected, and a front side of the frame 3 (FIG. 1).
, A plurality of guide rails 5 are laid. An L-shaped Z-axis carriage 9 is provided on the guide rail 5 via a plurality of sliders 7 so as to be movable in the Z-axis direction (vertical direction in FIG. 1). A nut member 11 extending in the front-rear direction (horizontal direction in FIG. 1) is provided at a rear portion of the vertical portion 9A of the carriage 9, and a ball screw 13 extending in the Z-axis direction is screwed to the nut member 11. Have been. The upper part of the ball screw 13 is connected to the feed motor 1 provided on the upper part of the frame 3.
5 and a lower portion of the ball screw 13 is rotatably supported by a bearing 17 provided on the frame 3. The feed motor 15 is provided with an encoder 19 as an example of a position detecting means.
【００１７】上記構成により、送りモータ１５を駆動せ
しめると、ボールねじ１３が回転されるから、ナット部
材１１が上下動される。このナット部材１１の上下動に
よりスライダ７を介してＺ軸キャレッジ９がガイドレー
ル５に沿って上下動されることになる。With the above configuration, when the feed motor 15 is driven, the ball screw 13 is rotated, so that the nut member 11 is moved up and down. The vertical movement of the nut member 11 causes the Z-axis carriage 9 to move up and down along the guide rail 5 via the slider 7.
【００１８】前記Ｚ軸キャレッジ９の水平部９Ｂの上部
には回転用モータ２１が設けられており、この回転用モ
ータ２１には回転速度を検出するエンコーダ２３が備え
られている。しかも、前記回転モータ２１には絶縁部材
２５を介して砥石ヘッド２７が回転可能に連結されてい
る。この砥石ヘッド２７の下部には導電性を有した例え
ばカップ状の砥石２９が設けられている。この砥石２９
は例えば砥粒とカーボンとが混合されバインダにより結
合されて導電性を有している。A rotary motor 21 is provided above the horizontal portion 9B of the Z-axis carriage 9, and the rotary motor 21 is provided with an encoder 23 for detecting a rotational speed. In addition, a grindstone head 27 is rotatably connected to the rotary motor 21 via an insulating member 25. Below the grindstone head 27, for example, a cup-shaped grindstone 29 having conductivity is provided. This whetstone 29
Has conductivity, for example, in which abrasive grains and carbon are mixed and bound by a binder.
【００１９】上記構成により、回転用モータ２１を駆動
せしめると、砥石ヘッド２７が回転されるので、砥石２
９が同方向へ回転されることになる。With the above configuration, when the rotation motor 21 is driven, the grindstone head 27 is rotated.
9 will be rotated in the same direction.
【００２０】前記フレームの前側（図１において左側）
には上方を開口した箱形状の支持フレーム３１が取付け
られており、この支持フレーム３１の下部フレーム３１
Ｄに軸受３３を介してワークテーブル３５が回転可能に
支承されている。このワークテーブル３５の上部にはチ
ャック３７でもって加工すべき被加工物としてのワーク
Ｗがクランプされるものである。このワークＷの代りド
レッサーがクランプされることもある。The front side of the frame (left side in FIG. 1)
A box-shaped support frame 31 having an open top is attached to the lower frame 31 of the support frame 31.
A work table 35 is rotatably supported on D via a bearing 33. A work W as a workpiece to be processed by the chuck 37 is clamped on the upper portion of the work table 35. The dresser may be clamped instead of the work W.
【００２１】前記ワークテーブル３５の下部には下方へ
突出した回転軸３９が取付けられていると共にこの回転
軸３９にはプーリ４１が装着されている。前記フレーム
３の前側にはモータベース４３が取付けられていると共
にこのモータベース４３には回転用モータ４５が設けら
れている。この回転用モータ４５にはエンコーダ４７が
備えられている。前記回転用モータ４５の出力軸４９に
は駆動プーリ５１が装着されている。この駆動プーリ５
１と前記プーリ４１とにはベルト５３が巻回されてい
る。A rotary shaft 39 protruding downward is attached to the lower portion of the work table 35, and a pulley 41 is mounted on the rotary shaft 39. A motor base 43 is mounted on the front side of the frame 3, and a rotation motor 45 is provided on the motor base 43. The rotation motor 45 is provided with an encoder 47. A drive pulley 51 is mounted on an output shaft 49 of the rotation motor 45. This drive pulley 5
A belt 53 is wound around 1 and the pulley 41.
【００２２】上記構成により、回転用モータ４５を駆動
せしめると、出力軸４９を介して駆動プーリ５１が回転
されるから、ベルト５３，プーリ４１，回転軸３９を介
してワークテーブル３５が回転される。このワークテー
ブル３５にはチャック３７でもってワークＷ又はドレッ
サーがクランプされて設けられているから、ワークテー
ブル３５の回転によって同方向へワークＷ又はドレッサ
ーが回転されることになる。With the above configuration, when the rotation motor 45 is driven, the drive pulley 51 is rotated via the output shaft 49, so that the work table 35 is rotated via the belt 53, the pulley 41, and the rotation shaft 39. . Since the work W or the dresser is provided on the work table 35 by being clamped by the chuck 37, the rotation of the work table 35 causes the work W or the dresser to rotate in the same direction.
【００２３】前記ワークテーブル３５，砥石ヘッド２７
はそれぞれ金属製でできていて導通性を有している。こ
のワークテーブル３５と砥石ヘッド２７間には電源５５
を有した電気回路５７が形成されている。この電気回路
５７には接触位置検出手段の一例としての電流計などの
センサ５９が設けられている。しかも、このセンサ５
９，送りモータ１５，回転用モータ２１，４５およびエ
ンコーダ１９，２３，４７が制御装置６１に接続されて
いる。また、この制御装置６１には例えば第１判別手段
６３，接触位置演算手段６５を備えており、センサ５９
で砥石２９がワークＷ又はドレッサーに当接して導通し
たことを検出すると共に、このセンサ５９の検出信号が
第１判別手段６３に取り込まれて所定時間Ｔ0 継続する
と、被加工物接触位置であると判断し、さらに接触位置
演算手段６５で被加工物位置が演算される。また、セン
サ５９の検出信号の第２判別手段６７に取り込まれて作
動した後、所定時間Ｔ0 経過後に予め設定された複数回
のうちの２回目の検出信号が第２判別手段６７に取り込
まれて作動したときに、被加工物接触位置であると判断
し、さらに接触位置演算手段６５で被加工物が演算され
る。さらに、センサ５９の検出信号がワークＷ又はドレ
ッサーの複数個所において第３判別手段６９に取り込ま
れて作動したときに、最終の検出位置を被加工物接触位
置であると第３判別手段６９で判別すると共に接触位置
演算手段６５で演算するようにしても構わない。The work table 35 and the grindstone head 27
Are made of metal and have conductivity. A power supply 55 is provided between the work table 35 and the grindstone head 27.
Is formed. The electric circuit 57 is provided with a sensor 59 such as an ammeter as an example of a contact position detecting means. Moreover, this sensor 5
9, the feed motor 15, the rotation motors 21, 45, and the encoders 19, 23, 47 are connected to the control device 61. The control device 61 includes, for example, a first determination unit 63 and a contact position calculation unit 65.
When the detection signal of the sensor 59 is taken into the first discriminating means 63 and continues for a predetermined time T 0 , the workpiece is in contact with the workpiece. And the contact position calculating means 65 calculates the workpiece position. After the detection signal of the sensor 59 is input to the second determination means 67 and operated, after a predetermined time T 0 elapses, the second detection signal of a plurality of preset times is input to the second determination means 67. When operated, it is determined that the workpiece is in the contact position, and the contact position calculating means 65 calculates the workpiece. Further, when the detection signal of the sensor 59 is taken into the third discriminating means 69 at a plurality of positions of the workpiece W or the dresser and operated, the third discriminating means 69 discriminates that the final detection position is the workpiece contact position. Alternatively, the calculation may be performed by the contact position calculation means 65.
【００２４】前記Ｚ軸キャレッジ９の水平部９Ｂには、
先端にエア吹き付け手段の一例としてのエアノズル７１
を備えたホース７３の一部が取付けられていると共にホ
ース７３の他端には図示省略のエア源が接続されてい
る。したがって、Ｚ軸キャレッジ９が下降して砥石２９
がワークＷ又はドレッサーに当接して被加工物接触位置
を検出するときに、圧力源から圧縮エアがホース７３を
経てエアノズル７１からワークＷ又はドレッサーおよび
砥石２９へ向けて噴射されて、ワークＷの表面に又はド
レッサーおよび砥石２９に付着している水分や研削カス
などがワークＷ又はドレッサーの表面から吹き飛ばされ
て除去される（清掃される）ものである。In the horizontal portion 9B of the Z-axis carriage 9,
Air nozzle 71 as an example of air blowing means at the tip
Is attached, and an air source (not shown) is connected to the other end of the hose 73. Therefore, the Z-axis carriage 9 descends and the grindstone 29
Is pressed against the workpiece W or the dresser to detect the workpiece contact position, compressed air is injected from the pressure source through the hose 73 from the air nozzle 71 toward the workpiece W or the dresser and the grindstone 29, and the workpiece W Moisture, grinding debris, and the like adhering to the surface or to the dresser and the grindstone 29 are blown off from the surface of the work W or the dresser to be removed (cleaned).
【００２５】上記構成により、ワークＷ又はドレッサー
に砥石２９で研削加工する方法を、図２に示したフロー
チャートを基にして説明すると、まずステップＳ１で回
転用モータ２１を駆動せしめて砥石２９を備えた砥石ヘ
ッド２７を回転せしめる。この砥石ヘッド２７の回転数
は研削加工時の回転数とする。ステップＳ２で回転用モ
ータ４５を駆動せしめてワークＷをチャック３７でクラ
ンプしたワークテーブル３５を回転せしめる。このワー
クテーブル３５の回転数は研削加工時の回転数とする。A method of grinding the work W or the dresser with the grindstone 29 by the above configuration will be described with reference to the flowchart shown in FIG. 2. First, in step S1, the rotating motor 21 is driven to provide the grindstone 29. The grinding wheel head 27 is rotated. The rotational speed of the grinding wheel head 27 is the rotational speed at the time of grinding. In step S2, the rotation motor 45 is driven to rotate the work table 35 on which the work W is clamped by the chuck 37. The rotation speed of the work table 35 is the rotation speed at the time of grinding.
【００２６】ステップＳ３で送りモータ１５を駆動せし
めてＺ軸キャレッジ９を下降せしめる。このときの下降
速度は研削加工時の下降速度より等しいか速いものとす
る。次いで、ステップＳ４でＺ軸キャレッジ９が下降し
続けて、砥石２９がワークＷに接触したかどうかを第１
判別手段６３で判断する。すなわち、砥石２９がワーク
Ｗに接触し導通すると、センサ５９がＯＮし制御装置６
１へ検出信号が取り込まれる。In step S3, the feed motor 15 is driven to lower the Z-axis carriage 9. The lowering speed at this time is equal to or higher than the lowering speed at the time of grinding. Next, in step S4, the Z-axis carriage 9 continues to descend, and it is determined whether or not the grindstone 29 has contacted the workpiece W.
The determination is made by the determination means 63. That is, when the grindstone 29 comes into contact with the work W and becomes conductive, the sensor 59 is turned on and the control device 6
1, the detection signal is taken.
【００２７】ステップＳ５で、砥石２９がさらに所定時
間経過後にワークＷに接触したことを第１判別手段６３
で判断すると、再度センサ５９がＯＮし、この検出信号
が制御装置６１の接触位置検出手段６５へ取り込まれて
演算され、ステップＳ６で被加工物接触位置とされる。
このときの被加工物接触位置はエンコーダ１９によって
検出されて制御装置６１に取り込まれる。In step S5, the first discriminating means 63 determines that the grinding wheel 29 has come into contact with the workpiece W after a predetermined time has elapsed.
When the determination is made, the sensor 59 is turned on again, and this detection signal is taken into the contact position detecting means 65 of the control device 61 and calculated, and is set as the workpiece contact position in step S6.
The workpiece contact position at this time is detected by the encoder 19 and taken into the control device 61.
【００２８】次に、ステップＳ７でＺ軸キャレッジ９を
わずか上昇せしめた後、今度はステップＳ８でＺ軸キャ
レッジ９を研削加工時の下降速度で下降せしめて、被加
工物接触位置到達後にステップＳ９で研削加工が行われ
て研削加工が終了すると、Ｚ軸キャレッジ９は元の位置
へ上昇される。Next, after the Z-axis carriage 9 is slightly raised in step S7, the Z-axis carriage 9 is lowered at the descent speed at the time of grinding in step S8. When the grinding process is completed and the grinding process is completed, the Z-axis carriage 9 is raised to the original position.
【００２９】而して、誤差の少ない被加工物接触位置を
検出することができると共に、高精度な研削加工を行う
ことができる。Thus, it is possible to detect a workpiece contact position with a small error and to perform highly accurate grinding.
【００３０】上記図２におけるフローチャートで、ステ
ップＳ４において１回目の接触がセンサ５９のＯＮによ
る導通で判断された後、ステップＳ５で複数回のうち例
えば、２回目の接触を第２判別手段６７で判断し、さら
に接触位置演算手段６５で演算してもよく、また、２回
目でなく、３回目以上の複数個所においてセンサ５９が
ＯＮしたことを第３判別手段６９で判別し、さらに接触
位置演算手段６５で演算するようにしても構わない。In the flowchart shown in FIG. 2, after the first contact is determined by the ON of the sensor 59 in step S4, for example, the second contact among a plurality of times is determined by the second determination means 67 in step S5. The third determination means 69 may determine that the sensor 59 has been turned on at a plurality of third or more locations, not the second time, and then calculate the contact position. The calculation may be performed by the means 65.
【００３１】また、少なくともステップＳ１からステッ
プＳ６までの間エアノズル６５から圧縮エアをワークＷ
へ向け噴射し続けておけば、ワークＷの表面に付着して
いる水分や研削カスが圧縮エアにより吹き飛ばされて除
去されワークＷの表面はきれいに清掃される。その結
果、被加工物接触位置を検出する際の誤動作をする邪魔
物がなくなり、誤動作が従来よりも少なくなり、正確に
被加工物接触位置を検出することができる。而して、研
削加工時の研削精度を良好にした研削加工を行うことが
できる。また、構造が非常に簡単で低価格で提供でき
る。At least during the period from step S1 to step S6, compressed air is supplied from the air nozzle 65 to the workpiece W.
If the spray is continued toward the surface of the work W, the moisture and the grinding debris adhering to the surface of the work W are blown off by the compressed air to be removed, and the surface of the work W is cleaned cleanly. As a result, there is no obstacle to malfunction when detecting the workpiece contact position, the number of malfunctions is smaller than in the past, and the workpiece contact position can be detected accurately. Thus, it is possible to perform the grinding with improved grinding accuracy during the grinding. In addition, the structure is very simple and can be provided at a low price.
【００３２】砥石２９は砥粒にカーボンを混合せしめバ
インダにより結合せしめて導電性を有する例で説明した
が、図３（Ａ），（Ｂ）に示されているように、砥石２
９の少なくとも１ケ所にカーボンＣを設けて形成せしめ
るようにし、このカーボンＣの部分がワークに接触して
いる時間が設定時間継続したときの位置又は、ワークの
表面状態等によっては上記カーボン部分がワークに接触
し、その後に接触状態が解除される態様となることがあ
るので、ワークに対して砥石を回転したら相対的に近接
せしめるときに、単時間内接触場所が変化して複数回接
触したときに、この複数回目の接触したときの位置を接
触位置として検出することでも可能である。なお、この
内容は砥石２９として砥粒にカーボンを混合せしめバイ
ンダにより結合したときにも同様理由で行っている。The grinding stone 29 has been described as an example in which carbon is mixed with abrasive grains and bonded with a binder to have conductivity, but as shown in FIGS. 3A and 3B, the grinding stone 2
9, carbon C is provided at least at one position, and the carbon portion may be formed depending on the position where the time when the carbon C portion is in contact with the work continues for a set time or the surface condition of the work. Since it may be in a mode in which the contact state is released after contacting the work, when the grindstone is rotated relatively to the work and brought closer to the work, the contact location changes within a single hour and the work is contacted a plurality of times. Sometimes, it is also possible to detect the position at the time of the plurality of times of contact as the contact position. Note that this is also performed for the same reason when carbon is mixed with abrasive grains as the grindstone 29 and bonded by a binder.
【００３３】なお、この発明は、前述した発明の実施の
形態に限定されることなく、適宜な変更を行うことによ
り、その他の態様で実施し得るものである。The present invention is not limited to the above-described embodiment of the present invention, but can be embodied in other forms by making appropriate changes.
【００３４】[0034]
【発明の効果】以上のごとき発明の実施の形態の説明か
ら理解されるように、請求項１，４の発明によれば、少
なくとも導電性を有した砥石を回転せしめて被加工物に
相対的に接近せしめる。そして、砥石が被加工物に当接
して導通したことが検出される。この導通が所定時間以
上継続したとき、又は予め設定した複数回目の導通を検
出したときに、その所定時間経過時又は予め設定した複
数回目の導通検出位置を被加工物接触位置とすることに
より、この被加工物接触位置は誤差を少なくして検出す
ることができると共に、被加工物に研削精度良好な研削
加工を行うことができる。As will be understood from the above description of the embodiments of the present invention, according to the first and fourth aspects of the present invention, at least the grindstone having conductivity is rotated so that the grindstone is rotated relative to the workpiece. Approach. Then, it is detected that the grindstone is brought into contact with the workpiece to conduct electricity. When this conduction has continued for a predetermined time or more, or when a plurality of preset conduction has been detected, by setting the predetermined conduction detection position after the elapse of the predetermined time or a plurality of preset conduction detection positions as a workpiece contact position, The workpiece contact position can be detected with a small error, and the workpiece can be ground with good grinding accuracy.
【００３５】請求項２，５の発明によれば、導通性を有
した砥石又は被加工物の少なくとも一方を回転せしめて
砥石を被加工物に相対的に接触せしめる。そして、砥石
が被加工物に当接して導通したことが検出される。この
検出を複数個所において検出し、最終検出位置を被加工
物接触位置とすることにより、この被加工物接触位置は
誤差を少なくして検出することができると共に被加工物
に研削精度良好な研削加工を行うことができる。According to the second and fifth aspects of the present invention, at least one of the conductive grindstone and the workpiece is rotated to bring the grindstone into relatively contact with the workpiece. Then, it is detected that the grindstone is brought into contact with the workpiece to conduct electricity. By detecting this detection at a plurality of locations and setting the final detection position as the workpiece contact position, the workpiece contact position can be detected with a reduced error and the workpiece can be ground with good grinding accuracy. Processing can be performed.
【００３６】請求項３，６の発明によれば、被加工物接
触検出時に被加工物の表面へエアを吹き付けることによ
って、被加工物の表面が清掃されて、水分や研削カス等
が除去されるので、砥石が被加工物に接触したことをよ
り一層正確に検出することができる。According to the third and sixth aspects of the present invention, the surface of the workpiece is blown by blowing air at the time of contact detection of the workpiece, thereby cleaning the surface of the workpiece and removing moisture, grinding debris, and the like. Therefore, it is possible to more accurately detect that the grindstone has contacted the workpiece.
【図１】この発明を実施する研削盤の側面図である。FIG. 1 is a side view of a grinding machine embodying the present invention.
【図２】この発明のワークに研削加工を行う動作のフロ
ーチャートである。FIG. 2 is a flowchart of an operation of performing a grinding process on a work according to the present invention.
【図３】（Ａ），（Ｂ）は砥石の一例を示す正面図、平
面図である。3A and 3B are a front view and a plan view showing an example of a grindstone.
１ 研削盤 ３ フレーム ９ Ｚ軸キャレッジ １５ 送りモータ １９ エンコーダ（位置検出手段） ２１ 回転用モータ ２３ エンコーダ ２５ 絶縁部材 ２７ 砥石ヘッド ２９ 砥石 ３５ ワークテーブル ４５ 回転用モータ ４７ エンコーダ ５９ センサ（接触検出手段） ６１ 制御装置 ６３ 第１判別手段 ６５ 接触位置演算手段 ６７ 第２判別手段 ６９ 第３判別手段 ７１ エアノズル（エア吹き付け手段） Reference Signs List 1 grinding machine 3 frame 9 Z-axis carriage 15 feed motor 19 encoder (position detection means) 21 rotation motor 23 encoder 25 insulating member 27 grinding stone head 29 grinding stone 35 work table 45 rotation motor 47 encoder 59 sensor (contact detection means) 61 Control device 63 First discriminating means 65 Contact position calculating means 67 Second discriminating means 69 Third discriminating means 71 Air nozzle (air blowing means)
Claims (6)
接触位置を検出する方法において、少なくとも導電性を
有した砥石を回転して被加工物に相対的に接近させ、被
加工物と砥石との接触による導通を検出し、上記導通が
所定時間以上継続したとき、又は予め設定された複数回
目の導通を検出したときに、その所定時間経過時の位置
又は予め設定した複数回目の導通検出位置を被加工物接
触位置として検出することを特徴とする砥石の接触位置
検出方法。In a method for detecting a contact position between a workpiece and a grindstone during a grinding process, at least a conductive grindstone is rotated to relatively approach the workpiece, and the workpiece and the grindstone are rotated. When the conduction is detected by contact with the sensor and the conduction continues for a predetermined time or more, or when a plurality of predetermined conductions are detected, the position at the time when the predetermined time has elapsed or the plurality of predetermined conduction detections is detected. A method for detecting a contact position of a grindstone, wherein the position is detected as a workpiece contact position.
接触位置を検出する方法において、導電性を有した砥石
又は被加工物の少なくとも一方を回転し、相対的に接近
せしめ、砥石と被加工物との接触導通を複数個所におい
て検出し、最終検出位置を被加工物接触位置として検出
することを特徴とする砥石の接触位置検出方法。2. A method for detecting a contact position between a workpiece and a grindstone during a grinding process, wherein at least one of a conductive grindstone and the workpiece is rotated and relatively approached, and the grindstone and the workpiece are rotated. A method for detecting a contact position of a grindstone, wherein contact continuity with a workpiece is detected at a plurality of locations, and a final detection position is detected as a workpiece contact position.
物の表面及び砥石にエアを吹き付けることを特徴とする
請求項１又は２記載の砥石の接触位置検出方法。3. The method for detecting a contact position of a grinding wheel according to claim 1, wherein air is blown to the surface of the workpiece and the grindstone until the contact position of the workpiece is detected.
能な砥石の相対的な位置を検出する位置検出手段と、被
加工物と砥石との接触を検出する接触検出手段と、この
接触検出手段による検出の通電時間が所定時間に達した
か否かを判別する第１判別手段又は被加工物と砥石との
接触による通電が予め設定された複数回行われたか否か
を判別する第２判別手段と、前記第１又は第２判別手段
の判別結果と前記位置検出手段の検出結果に基いて被加
工物に対する砥石の接触位置を求める接触位置演算手段
と、を備えてなることを特徴とする砥石の接触位置検出
装置。4. A position detecting means for detecting a relative position of a rotatable grindstone having conductivity with respect to a workpiece, a contact detecting means for detecting contact between the workpiece and the grinding wheel, and the contact detection. First determining means for determining whether or not the energizing time detected by the means has reached a predetermined time, or second determining whether or not energizing by contact between the workpiece and the grindstone has been performed a plurality of preset times. Discriminating means, and contact position calculating means for obtaining a contact position of the grindstone on the workpiece based on the discrimination result of the first or second discriminating means and the detection result of the position detecting means. Device for detecting the contact position of the grinding wheel.
能な砥石の相対的な位置を検出する位置検出手段と、被
加工物と砥石との接触を検出する接触検出手段と、この
接触検出手段による検出の接触導通が複数個所における
最終個所であるか否かを判別する第３判別手段と、この
第３判別手段の判別結果と前記位置検出手段の検出結果
に基いて被加工物に対する砥石の接触位置を求める接触
位置演算手段と、を備えてなることを特徴とする砥石の
接触位置検出装置。5. A position detecting means for detecting a relative position of a rotatable grindstone having conductivity with respect to a workpiece, a contact detecting means for detecting contact between the workpiece and the grinding wheel, and the contact detecting means. A third determining means for determining whether or not the contact conduction detected by the detecting means is the last place in a plurality of places; and a whetstone for the workpiece based on a result of the determination by the third determining means and a result of the detection by the position detecting means. And a contact position calculating means for determining a contact position.
付けるエア吹き付け手段を備えてなることを特徴とする
請求項４又は５記載の砥石の接触位置検出装置。6. The grindstone contact position detecting device according to claim 4, further comprising air blowing means for blowing air to the surface of the workpiece and the grindstone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20213698A JP4217301B2 (en) | 1998-07-16 | 1998-07-16 | Grinding wheel contact position detection method and apparatus, and grinding wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20213698A JP4217301B2 (en) | 1998-07-16 | 1998-07-16 | Grinding wheel contact position detection method and apparatus, and grinding wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000033565A true JP2000033565A (en) | 2000-02-02 |
| JP4217301B2 JP4217301B2 (en) | 2009-01-28 |
Family
ID=16452566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20213698A Expired - Fee Related JP4217301B2 (en) | 1998-07-16 | 1998-07-16 | Grinding wheel contact position detection method and apparatus, and grinding wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4217301B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007245315A (en) * | 2006-03-17 | 2007-09-27 | Taiwa Seisakusho:Kk | Grinding method of non-conductive workpiece and device thereof |
| WO2010131610A1 (en) * | 2009-05-15 | 2010-11-18 | 旭硝子株式会社 | Method for setting working position of grindstone for grinding glass end face |
| WO2014061434A1 (en) | 2012-10-17 | 2014-04-24 | 株式会社 アマダ | Die measurement apparatus |
-
1998
- 1998-07-16 JP JP20213698A patent/JP4217301B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007245315A (en) * | 2006-03-17 | 2007-09-27 | Taiwa Seisakusho:Kk | Grinding method of non-conductive workpiece and device thereof |
| WO2010131610A1 (en) * | 2009-05-15 | 2010-11-18 | 旭硝子株式会社 | Method for setting working position of grindstone for grinding glass end face |
| CN102427913A (en) * | 2009-05-15 | 2012-04-25 | 旭硝子株式会社 | Method for setting working position of grindstone for grinding glass end face |
| JPWO2010131610A1 (en) * | 2009-05-15 | 2012-11-01 | 旭硝子株式会社 | Processing position setting method for grinding wheel for glass end face grinding |
| WO2014061434A1 (en) | 2012-10-17 | 2014-04-24 | 株式会社 アマダ | Die measurement apparatus |
| US10071455B2 (en) | 2012-10-17 | 2018-09-11 | Amada Company, Limited | Tool measuring apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4217301B2 (en) | 2009-01-28 |
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