JPH06304861A - Grinding device - Google Patents

Grinding device

Info

Publication number
JPH06304861A
JPH06304861A JP9739993A JP9739993A JPH06304861A JP H06304861 A JPH06304861 A JP H06304861A JP 9739993 A JP9739993 A JP 9739993A JP 9739993 A JP9739993 A JP 9739993A JP H06304861 A JPH06304861 A JP H06304861A
Authority
JP
Japan
Prior art keywords
workpiece
grinding
diameter
grindstone
detecting
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
Application number
JP9739993A
Other languages
Japanese (ja)
Other versions
JP3168767B2 (en
Inventor
Takao Yoneda
孝夫 米田
Takayuki Hotta
尊之 堀田
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.)
Toyoda Koki KK
Original Assignee
Toyoda Koki KK
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 Toyoda Koki KK filed Critical Toyoda Koki KK
Priority to JP9739993A priority Critical patent/JP3168767B2/en
Publication of JPH06304861A publication Critical patent/JPH06304861A/en
Application granted granted Critical
Publication of JP3168767B2 publication Critical patent/JP3168767B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

PURPOSE:To quickly feed a wheel spindle stock made advanceable in a condition that a space between a grinding wheel and a workpiece is always obtained in a necessary minimum limit, by providing a measuring arithmetic means for calculating a quick feed advancing position for placing the wheel spindle stock to approach the workpiece to a position of the necessary minimum limit based on a measured diameter. CONSTITUTION:During action of detecting an end face of a ground part, an advance command of a workpiece diameter measuring unit 20 is supplied from a CPU 41 to a fluid control part, to actuate a fluid pressure cylinder retracted, and the workpiece diameter measuring unit 20 is advanced to a side of a workpiece W, to engage a feeler of the unit 20 with a ground part before grinding. Thus by detecting a degree of opening the feeler in a displacement detecting part, a diameter of the ground part before grinding is measured. Based on this measured value, a quick feed advance position for approaching the workpiece W and a wheel spindle stock 13 to a position of necessary minimum limit is calculated in the CPU 41. In accordance with this calculated value, a servo motor 27 of the wheel spindle stock 13 is driven to be rotated, to advance the wheel spindle stock 13 quickly fed. Thereafter in accordance with a machining program, the wheel spindle stock 13 is cut-in fed to be controlled, to perform grinding work of the workpiece W.

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、研削装置に関し、特に
工作物に対し砥石台を研削加工プログラムに従って切込
み送り制御することにより、工作物を研削加工する研削
装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding machine, and more particularly to a grinding machine for grinding a work by controlling a cutting head of a grindstone for a work according to a grinding program.

【0002】[0002]

【従来の技術】従来、例えば円筒研削盤において、工作
物を研削加工する場合は、図5に示すように、砥石台
を、その砥石車の研削面が工作物に接触する直前まで早
送り前進させ、その後、予め指定した切込み速度にて砥
石台を所定量送り込むことにより工作物を粗研削し、し
かる後、予め指定した切込み速度にて砥石台を所定量送
り込むことにより工作物を精研削し、さらに予め指定し
た切込み速度にて砥石台を送り込むことにより工作物を
微研削し、この微研中に工作物の加工寸法が目標の寸法
に達したならば、砥石台を早戻し後退させる研削サイク
ルで工作物を加工するようにしていた。
2. Description of the Related Art Conventionally, when a workpiece is ground in a cylindrical grinder, for example, as shown in FIG. 5, a grinding wheel head is fast-forwarded to a position immediately before the grinding surface of the grinding wheel comes into contact with the workpiece. After that, the grindstone is roughly ground by feeding a predetermined amount of the grinding wheel base at a prespecified cutting speed, and then the work piece is precisely ground by feeding a predetermined amount of the grinding wheel base at a prespecified cutting speed, In addition, a grinding cycle in which the workpiece is finely ground by feeding the wheel head at a prespecified cutting speed, and if the machining size of the workpiece reaches the target dimension during this fine grinding, the wheel head is quickly returned and retracted. I was working on a workpiece.

【0003】[0003]

【発明が解決しようとする課題】ところで、砥石台を早
送り前進させるとき、砥石台の早送り量は、砥石車の研
削面を工作物に近接させるほど、研削全体のサイクルタ
イムを短くすることができる。しかるに、加工前の工作
物は同一種類のものであっても、その外径寸法には比較
的大きなバラツキがあるため、砥石台の早送り量は、工
作物径の最大のバラツキ量を考慮した値に設定しなけれ
ばならない。従って、工作物径のバラツキが大きい場合
には、これに応じて砥石台を早送り前進させたときの砥
石車の研削面と工作物の被研削面間の間隔も大きくな
り、研削サイクルタイム増加するという問題があった。
By the way, when the grindstone head is fast-forwarded and advanced, the rapid feed amount of the grindstone head can shorten the cycle time of the entire grinding as the grinding surface of the grindstone is closer to the workpiece. . However, even though the workpieces before machining are of the same type, there is a large variation in the outer diameter dimension, so the rapid feed rate of the grinding wheel head is a value that considers the maximum variation in the workpiece diameter. Must be set to. Therefore, when there is a large variation in the workpiece diameter, the gap between the grinding surface of the grinding wheel and the surface to be ground of the workpiece when the grinding wheel head is advanced rapidly increases accordingly, and the grinding cycle time increases. There was a problem.

【0004】本発明は、上記のような事情に鑑みなされ
たものであり、工作物径の研削加工サイクルタイムを短
縮できる研削装置を提供することを目的とする。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a grinding apparatus capable of shortening the grinding cycle time of the workpiece diameter.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に本発明は、ベッドと、このベッド上に設けられ回転駆
動される砥石車を有する砥石台と、ベッド上に設けられ
たテーブルと、このテーブル上に設けられ基準端面を有
する工作物を回転駆動する主軸台と、前記砥石車により
研削される工作物と砥石車とが接離する方向に前記砥石
台を移動させる第1駆動手段と、前記テーブルを工作物
の回転軸線方向に移動させる第2駆動手段と、前記砥石
台の位置を検出する位置検出手段と、前記工作物の径を
計測する工作物径測定手段と、前記ベッド上に設けられ
前記工作物の基準端面を検出する端面検出手段と、前記
第2駆動手段を制御することでテーブルを移動させ、工
作物の基準端面を端面検出手段にて検出した時点でテー
ブルの移動を停止し、前記第1駆動手段を制御すること
で砥石台を早送り前進させ、続いて研削送りする加工制
御手段とを備えた研削装置において、前記加工制御手段
で制御される第2駆動手段によってテーブルを移動さ
せ、工作物の基準端面を端面検出手段にて検出する動作
と並行して前記工作物径測定手段にて工作物の径を測定
し、この測定値を基に前記砥石台と工作物とを必要最小
限の位置まで接近させるための早送り前進位置を演算す
る測定演算手段を備えてなるものである。
In order to achieve the above object, the present invention provides a bed, a grinding wheel base having a grinding wheel that is rotatably driven and that is provided on the bed, and a table that is provided on the bed. A headstock provided on the table for rotationally driving a workpiece having a reference end surface; first driving means for moving the grindstone in a direction in which the workpiece ground by the grindstone and the grindstone come into contact with and separate from each other; Second drive means for moving the table in the direction of the axis of rotation of the workpiece, position detection means for detecting the position of the grindstone, workpiece diameter measuring means for measuring the diameter of the workpiece, and on the bed The table is moved by controlling the end face detecting means provided on the end face for detecting the reference end face of the workpiece and the second driving means, and the table is moved when the reference end face of the workpiece is detected by the end face detecting means. Stop In a grinding machine provided with a machining control means for fast-forwarding and advancing the grinding wheel head by controlling the first drive means, and then for grinding feed, the table is moved by the second drive means controlled by the machining control means. Then, in parallel with the operation of detecting the reference end face of the workpiece by the end face detecting means, the diameter of the workpiece is measured by the workpiece diameter measuring means, and the grindstone base and the workpiece are based on the measured value. It is provided with a measurement calculation means for calculating a fast-forward advance position for approaching to a required minimum position.

【0006】[0006]

【作用】上記の構成により、工作物の基準端面検出のテ
ーブル割出しと並列して、工作物径測定手段で測定した
加工開始前の工作物径に基づいて測定演算手段により砥
石台の早送り前進位置を算出し、この算出値にしたがっ
て砥石台を早送り前進させるから、加工開始前の工作物
径のバラツキに関係なく、工作物と砥石車との間隔を常
に必要最小限にすることができる。
With the above construction, in parallel with the table indexing for detecting the reference end face of the workpiece, the measuring and computing means, based on the workpiece diameter before the start of machining, measured by the workpiece diameter measuring means, causes rapid advance of the grinding wheel head. Since the position is calculated and the grindstone head is fast-forwarded forward according to this calculated value, the distance between the workpiece and the grinding wheel can always be minimized regardless of the variation in the workpiece diameter before the start of machining.

【0007】[0007]

【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図1は、本発明による研削装置の全体の構成図
である。図1において、10は円筒研削盤、40は研削
盤10を制御する数値制御装置である。研削盤10は、
ベッド11上にZ軸方向に移動可能に設置した工作物テ
ーブル12、およびベッド11上にX軸方向に移動可能
に設置した砥石台13を備える。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a grinding apparatus according to the present invention. In FIG. 1, 10 is a cylindrical grinder, and 40 is a numerical controller for controlling the grinder 10. The grinding machine 10
The work table 12 is installed on the bed 11 so as to be movable in the Z-axis direction, and the grindstone base 13 is installed on the bed 11 so as to be movable in the X-axis direction.

【0008】工作物テーブル12は、ベッド11に設け
たサーボモータ14および図略の送りねじによりZ軸方
向に移動される。サーボモータ14は、その回転から工
作物テーブル12の位置を検出するエンコーダ14aを
備え、このエンコーダ14aの検出信号は数値制御装置
40に入力される。工作物テーブル12上には、主軸1
6を軸承する主軸台15と心押台17が左右に位置して
対向設置されている。工作物Wの両端は、主軸16と心
押台17にそれぞれ設けたセンタ15a,17aによっ
て支持され、さらに工作物Wの左端部には主軸16に突
設した回止め部材18が係合され、これにより工作物W
を主軸16と一体に回転させるようになっている。ま
た、主軸16は主軸台15に設けたモータ19により回
転駆動される。
The work table 12 is moved in the Z-axis direction by a servomotor 14 provided on the bed 11 and a feed screw (not shown). The servomotor 14 includes an encoder 14a that detects the position of the workpiece table 12 based on the rotation of the servomotor 14, and the detection signal of the encoder 14a is input to the numerical controller 40. On the work table 12, the spindle 1
A headstock 15 and a tailstock 17 that support 6 are located on the left and right and face each other. Both ends of the workpiece W are supported by the centers 15a and 17a provided on the spindle 16 and the tailstock 17, respectively, and the left end portion of the workpiece W is engaged with a detent member 18 projecting from the spindle 16. As a result, the workpiece W
Is rotated integrally with the main shaft 16. Further, the spindle 16 is rotationally driven by a motor 19 provided on the spindle stock 15.

【0009】20は工作物テーブル12上に工作物Wに
対向して設置されたインプロセスタイプの工作物径測定
装置であり、この工作物径測定装置20で測定された工
作物Wの測定信号はA/Dコンバータ32を通して数値
制御装置40に入力される。また、21はベッド11上
に工作物Wに対向して設置された、工作物Wの被研削部
Waの基準端面Wbを検出する端面検出装置であり、こ
の端面検出装置21から出力される検出信号はA/Dコ
ンバータ33を通して数値制御装置40に入力される。
Reference numeral 20 denotes an in-process type workpiece diameter measuring device installed on the workpiece table 12 so as to face the workpiece W, and a measurement signal of the workpiece W measured by the workpiece diameter measuring device 20. Is input to the numerical controller 40 through the A / D converter 32. Reference numeral 21 denotes an end face detection device that is installed on the bed 11 so as to face the workpiece W and detects a reference end face Wb of the ground portion Wa of the workpiece W. The detection output from the end face detection device 21. The signal is input to the numerical controller 40 through the A / D converter 33.

【0010】前記砥石台13は、工作物Wの被研削部W
aを研削するCBN砥石などの砥石車23、この砥石車
23を主軸16と平行に支持する砥石軸24、及びこの
砥石軸24とベルトなどの回転伝達機構25を介して砥
石車23を回転駆動するモータ26を有する。また、砥
石台13は、ベッド11に設けたサーボモータ27と、
このサーボモータ27により回転される図略の送りねじ
によってX軸方向(工作物Wの軸線と直交する方向)に
移動される。
The grindstone 13 has a portion W to be ground of the workpiece W.
A grinding wheel 23 such as a CBN grinding wheel that grinds a, a grinding wheel shaft 24 that supports the grinding wheel 23 in parallel with the main shaft 16, and a grinding wheel 23 that is rotationally driven via a rotation transmission mechanism 25 such as the grinding wheel shaft 24 and a belt. It has a motor 26 that operates. Further, the whetstone base 13 includes a servo motor 27 provided on the bed 11,
It is moved in the X-axis direction (direction orthogonal to the axis of the workpiece W) by a feed screw (not shown) rotated by the servo motor 27.

【0011】サーボモータ27は、その回転から砥石台
13の移動量を検出するエンコーダ27aを備え、この
エンコーダ27aの検出信号は数値制御装置40に入力
される。
The servomotor 27 is provided with an encoder 27a for detecting the amount of movement of the grindstone 13 based on its rotation, and the detection signal of this encoder 27a is inputted to the numerical controller 40.

【0012】数値制御装置40は、図1に示すように、
研削盤全体を制御し管理する中央処理装置(以下CPU
という)41、メモリ42、外部とのデータの授受を行
うインタフェース43およびCPU41からの指令に応
じて駆動パルスを分配送出するパルス分配回路44,4
5を備え、これらはCPU41に接続されている。CP
U41には、工作物径測定装置20のA/Dコンバータ
32および端面検出装置21のA/Dコンバータ33が
それぞれ接続されている。
The numerical controller 40, as shown in FIG.
Central processing unit (hereinafter CPU) that controls and manages the entire grinding machine
41), a memory 42, an interface 43 for exchanging data with the outside, and pulse distribution circuits 44, 4 for distributing and transmitting drive pulses in response to commands from the CPU 41.
5, which are connected to the CPU 41. CP
An A / D converter 32 of the workpiece diameter measuring device 20 and an A / D converter 33 of the end face detecting device 21 are connected to U41.

【0013】また、インタフェース43には、制御デー
タ、研削開始指令等を入力する操作ボタン、およびCR
T表示部等を有する入力装置50が接続されている。さ
らに、パルス分配回路44には、駆動回路61を介して
工作物テーブル用サーボモータ14が接続され、パルス
分配回路45には、駆動回路62を介して砥石台用サー
ボモータ27が接続されている。
Further, the interface 43 has an operation button for inputting control data, a grinding start command and the like, and a CR.
An input device 50 having a T display unit and the like is connected. Further, the work table servomotor 14 is connected to the pulse distribution circuit 44 via a drive circuit 61, and the grinding wheel head servomotor 27 is connected to the pulse distribution circuit 45 via a drive circuit 62. .

【0014】メモリ42は、図1に示すように、工作物
Wを研削加工するための加工プログラム、加工前の工作
物Wの外径データから砥石台13の早送り量を算出する
演算プログラム、およびCPU41での演算結果などを
格納する。
The memory 42, as shown in FIG. 1, is a machining program for grinding the workpiece W, an arithmetic program for calculating the rapid feed amount of the grinding wheel head 13 from the outer diameter data of the workpiece W before machining, and The calculation result in the CPU 41 is stored.

【0015】図2は、工作物径測定装置20の構成図を
示すもので、工作物Wの外周に両側から当接する一対の
フィーラ20aと、このフィーラ20aの機械的変位を
電気信号に変換する差動トランス等の変位検出部20b
とから構成される。また、この工作物径測定装置20は
支持部材201を介して流体圧シリンダ202のピスト
ンロッド203に結合され、流体圧シリンダ202によ
り工作物Wに対し進退可能になっている。204は工作
物径測定装置20を進退可能に案内するパイロットバー
である。
FIG. 2 is a block diagram of the workpiece diameter measuring device 20. A pair of feelers 20a contacting the outer periphery of the workpiece W from both sides and a mechanical displacement of the feeler 20a are converted into electric signals. Displacement detector 20b such as a differential transformer
Composed of and. The workpiece diameter measuring device 20 is connected to a piston rod 203 of a fluid pressure cylinder 202 via a support member 201, and can be moved back and forth with respect to the workpiece W by the fluid pressure cylinder 202. Reference numeral 204 denotes a pilot bar that guides the workpiece diameter measuring device 20 so that the workpiece diameter measuring device 20 can move forward and backward.

【0016】なお、端面検出装置21も図略の流体圧シ
リンダなどにより、工作物W側へ進退可能になってい
る。なお、上記実施例において、サーボモータ27は第
1駆動手段を、サーボモータ14は第2駆動手段を、エ
ンコーダ14は位置検出手段を、端面検出装置21は端
面検出手段を、工作物径測定装置20は工作物径測定手
段を、CPU41およびメモリ42は測定演算手段を、
数値制御装置40が加工制御手段をそれぞれ構成する。
The end face detection device 21 can also be moved back and forth to the workpiece W side by a fluid pressure cylinder or the like (not shown). In the above embodiment, the servo motor 27 is the first driving means, the servo motor 14 is the second driving means, the encoder 14 is the position detecting means, the end face detecting device 21 is the end face detecting means, and the workpiece diameter measuring device. 20 is a workpiece diameter measuring means, and the CPU 41 and the memory 42 are measuring and calculating means.
The numerical control device 40 constitutes each processing control means.

【0017】次に、上記のように構成された本実施例の
動作を図3に示すフローチャートを参照して説明する。
入力装置50上の研削ボタン(不図示)が押されること
により、加工プログラムがスタートすると、CPU41
は、加工プログラムにしたがい端面検出装置21の前進
指令をメモリ42から読み出し、この前進指令を図略の
流体圧制御部に供給して、図略の流体圧シリンダを動作
させることにより、端面検出装置21を工作物W側へ前
進させる(ステップS1)。
Next, the operation of this embodiment configured as described above will be described with reference to the flow chart shown in FIG.
When the grinding program (not shown) on the input device 50 is pressed to start the machining program, the CPU 41
Reads the forward movement command of the end face detection device 21 from the memory 42 according to the machining program, supplies the forward movement command to a fluid pressure control unit (not shown), and operates a fluid pressure cylinder (not shown). 21 is advanced to the workpiece W side (step S1).

【0018】次に、CPU41は、加工プログラムにし
たがい工作物テーブル右進指令をメモリ42から読み出
し、この右進指令をパルス分配回路44に供給すること
により、パルス分配回路44からパルス信号を送出し、
このパルス信号を駆動回路61に供給することでサーボ
モータ14を回転駆動して工作物テーブル12をZ軸方
向に右進させる(ステップS2)。
Next, the CPU 41 reads a rightward command for the workpiece table from the memory 42 in accordance with the machining program and supplies the rightward command to the pulse distribution circuit 44, thereby sending a pulse signal from the pulse distribution circuit 44. ,
By supplying this pulse signal to the drive circuit 61, the servo motor 14 is rotationally driven to move the workpiece table 12 rightward in the Z-axis direction (step S2).

【0019】次のステップS3では、工作物テーブル1
2が図1において右進することにより、工作物Wの被研
削部Waの端面が端面検出装置21に接触し、この端面
検出装置21から端面検出信号が発生したかをCPU4
1で判定する。そして、端面検出信号がない場合はステ
ップS2に戻り、端面検出信号が発生するまで工作物テ
ーブル12を右進させる。
In the next step S3, the work table 1
2 moves to the right in FIG. 1, the end surface of the ground portion Wa of the workpiece W comes into contact with the end surface detection device 21, and the CPU 4 determines whether an end surface detection signal is generated from this end surface detection device 21.
Judge with 1. If there is no end face detection signal, the process returns to step S2, and the work table 12 is moved to the right until the end face detection signal is generated.

【0020】端面検出信号が発生したことが判定される
と、次のステップS4において、加工プログラムにした
がいCPU41から端面検出装置21の後退指令を図略
の流体圧制御部に出力することにより、図略の流体シリ
ンダを動作させて端面検出装置21を元位置に後退させ
る。これによって、砥石車23に対する工作物Wの軸方
向のバラツキが吸収される。
When it is determined that the end face detection signal has been generated, in the next step S4, the CPU 41 outputs a backward command of the end face detection device 21 to the fluid pressure controller (not shown) in accordance with the machining program. The end face detection device 21 is retracted to its original position by operating a substantially fluid cylinder. As a result, variations in the axial direction of the workpiece W with respect to the grinding wheel 23 are absorbed.

【0021】そして、次のステップS5では、加工プロ
グラムにしたがい工作物テーブル12を所定量移動さ
せ、工作物Wの被研削部Waと砥石車23とが対応する
位置に工作物テーブル12を割出す。これによって、工
作物Wを繰り返し研削を行う場合において、砥石車23
の同一箇所で被研削部Waの研削を行うことができ、加
工精度を向上させることができる。
Then, in the next step S5, the workpiece table 12 is moved by a predetermined amount according to the machining program, and the workpiece table 12 is indexed to a position where the ground portion Wa of the workpiece W and the grinding wheel 23 correspond to each other. . Accordingly, when the workpiece W is repeatedly ground, the grinding wheel 23
The grinding target part Wa can be ground at the same position, and the processing accuracy can be improved.

【0022】また、上記被研削部Waの端面検出動作中
に、加工プログラムにしたがいCPU41から工作物径
測定装置20の前進指令を図略の流体制御部に供給する
ことにより、流体圧シリンダ202を後退動作させて、
工作物径測定装置20を工作物W側へ前進させ(ステッ
プS6)、そのフィーラ20aを図2の2点鎖線に示す
ように加工前の被研削部Waに係合させる。これによ
り、フィーラ20aの開き度合を変位検出部20bで検
出することで被研削部Waの加工前の径を測定する。測
定された径信号はA/Dコンバータ32によりデジタル
信号に変換された後、CPU41に取り込まれる。この
とき、工作物Wを回転させる必要がない。
Further, during the operation of detecting the end surface of the portion to be ground Wa, the fluid pressure cylinder 202 is moved by supplying an advance command of the workpiece diameter measuring device 20 from the CPU 41 to the fluid control unit (not shown) according to the machining program. Move it backwards,
The workpiece diameter measuring device 20 is advanced to the workpiece W side (step S6), and the feeler 20a is engaged with the ground portion Wa before processing as shown by the chain double-dashed line in FIG. As a result, the opening degree of the feeler 20a is detected by the displacement detection unit 20b to measure the diameter of the ground portion Wa before processing. The measured diameter signal is converted into a digital signal by the A / D converter 32 and then taken into the CPU 41. At this time, it is not necessary to rotate the workpiece W.

【0023】CPU41では、砥石台早送り量演算プロ
グラムと、前記測定された加工前の径データに基づい
て、K=a−α−(D/2)の式から被研削部Waに最
適な砥石台早送り量Kを算出する(ステップS7)。上
記砥石台早送り量Kの式、K=a−α−(D/2)は図
4に示す関係から与えられる。この式において、 aは図4に示すように砥石台が後退端にあるときの砥石
車23の研削面(原点0)から工作物Wの回転中心まで
の距離 αは早送りにより、砥石車を工作物Wの被研削面Waに
最大限に近接し得る許容値 Dは被研削部Waの直径 をそれぞれ表わす。
In the CPU 41, based on the grindstone head rapid feed amount calculation program and the measured diameter data before processing, the optimum grindstone head for the portion to be ground Wa from the equation K = a-α- (D / 2). The rapid feed amount K is calculated (step S7). The above formula for the rapid movement amount of the grinding wheel head K, K = a-α- (D / 2), is given from the relationship shown in FIG. In this equation, a is the distance from the grinding surface (origin 0) of the grinding wheel 23 to the center of rotation of the workpiece W when the grinding wheel head is at the backward end as shown in FIG. The permissible value D that allows the workpiece W to approach the ground surface Wa to the maximum extent represents the diameter of the ground portion Wa.

【0024】砥石台早送り量Kの演算処理が終了する
と、ステップS8に進み、CPU41から後退指令を図
略の流体圧制御部に供給することにより、流体圧シリン
ダ202を前進動作させて工作物径測定装置20を元位
置に後退させる。
When the processing for calculating the rapid feed rate of the grinding wheel head K is completed, the process proceeds to step S8, and a backward command is supplied from the CPU 41 to a fluid pressure control unit (not shown) to advance the fluid pressure cylinder 202 to move the workpiece diameter. The measuring device 20 is retracted to its original position.

【0025】次のステップS9では、算出した早送り量
Kに応じた指令信号をCPU41からパルス分配回路4
5に供給することにより、このパルス分配回路45から
指令信号に応じた数のパルス信号を送出し、このパルス
信号を駆動回路62に供給してサーボモータ27を回転
駆動することにより、砥石台13を算出した早送り量K
だけ早送り前進させる。
In the next step S9, a command signal corresponding to the calculated rapid feed amount K is sent from the CPU 41 to the pulse distribution circuit 4.
5, the pulse distribution circuit 45 outputs a number of pulse signals corresponding to the command signal, and the pulse signals are supplied to the drive circuit 62 to rotationally drive the servo motor 27, whereby the wheel head 13 is rotated. Rapid feed amount K calculated
Fast forward only forward.

【0026】次のステップS10aでは、加工プログラ
ムにしたがいCPU41から第1粗研指令信号をパルス
分配回路45に供給することにより、パルス分配回路4
5から第1粗研に応じたパルス信号を送出し、このパル
ス信号を駆動回路62に供給してサーボモータ27を回
転駆動することにより、砥石台13を第1粗研指令に応
じた送り速度で所定量前進させ、被研削部Waを砥石車
23により第1粗研削し、被研削部Waの黒皮を落す。
In the next step S10a, the pulse distribution circuit 4 is supplied with the first roughening command signal from the CPU 41 according to the machining program.
A pulse signal corresponding to the first rough grinding command is sent from 5 and the pulse signal is supplied to the drive circuit 62 to drive the servo motor 27 to rotate, whereby the wheel head 13 is fed at a feed speed according to the first rough grinding command. Then, the ground portion Wa is advanced by a predetermined amount, the first rough grinding is performed on the ground portion Wa by the grinding wheel 23, and the black skin of the ground portion Wa is removed.

【0027】ステップ10bで工作物径測定装置20を
前進させ、ステップ10cで加工プログラムにしたが
い、CPU41から第2粗研指令信号をパルス分配回路
45に供給することにより、パルス分配回路45から第
2粗研に応じたパルス信号を送出し、このパルス信号を
駆動回路に供給してサーボモータ27を回転駆動するこ
とにより、砥石台13を第2粗研指令に応じた送り速度
にて前進させ、被研削部Waを砥石車23により第2粗
研削する。そして、この工作物径測定装置20で測定さ
れる被研削部Waの加工径信号はA/Dコンバータ32
によりデジタル量に変換されてCPU41に入力され
る。
In step 10b, the workpiece diameter measuring device 20 is moved forward, and in step 10c, the CPU 41 supplies the second roughing command signal to the pulse distribution circuit 45 according to the machining program. By sending a pulse signal according to the rough grinding and supplying this pulse signal to the drive circuit to drive the servomotor 27 to rotate, the wheel head 13 is moved forward at the feed speed according to the second rough grinding command, Second rough grinding is performed on the part to be ground Wa by the grinding wheel 23. The machining diameter signal of the ground portion Wa measured by the workpiece diameter measuring device 20 is the A / D converter 32.
Is converted into a digital amount and input to the CPU 41.

【0028】CPU41では、工作物径測定装置20か
ら出力される加工径信号が予め設定した第2粗研取り代
に相当する第1の定寸信号に達したかを判定する(ステ
ップS11)。ここで、第1の定寸信号に相当する加工
径信号がない場合はステップS10に戻り、第2粗研削
を続行させる。そして、第1の定寸信号に相当する加工
径信号があったことが判定されると、ステップS12に
進み、加工プログラムにしたがいCPU41から精研指
令をパルス分配回路45に供給することにより、パルス
分配回路から精研に応じたパルス信号を送出し、このパ
ルス信号を駆動回路62に供給してサーボモータ27を
回転駆動することにより、砥石台13を精研指令に応じ
た送り速度にて前進させ、被研削部Waを砥石車23に
より精研削する。
The CPU 41 determines whether the machining diameter signal output from the workpiece diameter measuring device 20 has reached the preset first sizing signal corresponding to the preset second roughing stock removal (step S11). If there is no machining diameter signal corresponding to the first constant size signal, the process returns to step S10 to continue the second rough grinding. When it is determined that there is a machining diameter signal corresponding to the first sizing signal, the process proceeds to step S12, and the CPU 41 supplies a refinement command to the pulse distribution circuit 45 in accordance with the machining program to generate a pulse. A pulse signal corresponding to the precision polishing is sent from the distribution circuit, and this pulse signal is supplied to the drive circuit 62 to drive the servomotor 27 to rotate, whereby the grinding wheel head 13 is moved forward at the feed speed according to the precision polishing command. Then, the ground portion Wa is finely ground by the grinding wheel 23.

【0029】次のステップS13では、工作物径測定装
置20から出力される加工径信号が予め設定した精研取
り代に相当する第2の定寸信号に達したかをCPU41
で判定する。ここで、第2の定寸信号に達していないと
きは精研削を続行し、第2の定寸信号に達したことが判
定されたならば、次のステップS14に示す微研削に移
行する。
In the next step S13, the CPU 41 determines whether or not the machining diameter signal output from the workpiece diameter measuring device 20 has reached the preset second sizing signal corresponding to the preset polishing removal allowance.
Determine with. Here, when the second sizing signal is not reached, the fine grinding is continued, and when it is determined that the second sizing signal is reached, the process proceeds to the fine grinding shown in the next step S14.

【0030】工作物Wの微研に際しては、加工プログラ
ムにしたがいCPU41から微研指令をパルス分配回路
45に供給することで、パルス分配回路45から微研に
応じたパルス信号を送出し、このパルス信号を駆動回路
62に供給してサーボモータ27を回転駆動することに
より、砥石台13を微研指令に応じた送り速度にて前進
させ、被研削部Waを砥石車23により微研削する。
When the work W is micro-machined, the micro-machine command is supplied from the CPU 41 to the pulse distribution circuit 45 in accordance with the machining program so that the pulse signal corresponding to the micro-machine is transmitted from the pulse distribution circuit 45. By supplying a signal to the drive circuit 62 to drive the servo motor 27 to rotate, the grindstone base 13 is advanced at the feed speed according to the fine grinding command, and the grindstone 23 finely grinds the portion to be ground Wa.

【0031】次のステップS15では、工作物径測定装
置20から出力される加工径信号が予め定めた目標寸
法、すなわち第3の定寸信号に達したかをCPU41で
判定する。ここで、第3の定寸信号になっていないとき
はステップS14に戻り、微研削を続行し、第3の定寸
信号になったことが判定されたときは次のステップS1
6に進む。
In the next step S15, the CPU 41 determines whether the machining diameter signal output from the workpiece diameter measuring device 20 has reached a predetermined target dimension, that is, a third sizing signal. Here, when the third sizing signal is not reached, the process returns to step S14, fine grinding is continued, and when it is determined that the third sizing signal is reached, the next step S1 is performed.
Go to 6.

【0032】ステップS16では、加工プログラムにし
たがいCPU41から砥石台早送り後退指令をパルス分
配回路45に供給することにより、パルス分配回路45
から後退指令に応じたパルス信号を送出し、このパルス
信号を駆動回路62に供給してサーボモータ27を回転
駆動することにより、砥石台13を後退指令に応じた速
度にて早送り後退させ、1つの工作物Wの加工が終了す
る。
In step S16, the pulse distribution circuit 45 is supplied from the CPU 41 in accordance with the machining program by supplying the wheel head rapid feed backward command to the pulse distribution circuit 45.
To send a pulse signal according to the backward command and supply the pulse signal to the drive circuit 62 to drive the servomotor 27 to rotate, whereby the wheel head 13 is fast-forwarded backward at a speed according to the backward command. The processing of one workpiece W is completed.

【0033】上記のような本実施例においては、研削加
工が開始される前に、工作物径測定装置20により工作
物Wの被研削部Waの外径を測定し、この測定値と式
K=a−α−(D/2)に基づいて砥石台13の早送り
量KをCPU41で算出し、この算出した早送り量Kだ
け砥石台13を早送り前進させた後、この早送り前進位
置から工作物Wの研削加工へ移行させる構成にしたの
で、工作物の被研削部径のバラツキに関係なく、砥石車
23を工作物の被研削部に必要最小限の位置まで接近さ
せることができる。
In this embodiment as described above, the outer diameter of the ground portion Wa of the workpiece W is measured by the workpiece diameter measuring device 20 before the grinding process is started, and the measured value and the expression
The CPU 41 calculates the rapid feed amount K of the grindstone base 13 based on K = a-α- (D / 2), advances the grindstone base 13 by the calculated rapid feed amount K, and then works from this rapid feed forward position. Since the configuration is such that the workpiece W is moved to the grinding process, the grinding wheel 23 can be brought close to the necessary portion of the workpiece regardless of the variation in the diameter of the workpiece.

【0034】これに伴い従来、工作物径のバラツキを見
込んで大きく確保しなければならなかった許容値αを小
さくすることができ、その分、研削サイクルタイムを短
縮できる。また、AEセンサのような砥石と工作物との
接触を検知する接触検知器が不要になり、これによって
装置のコスト上昇を防止できる。さらに、上述した実施
例は、ステップS1〜S3と並行してステップS6を行
うため、工作物径測定によってサイクルタイムが長くな
ることがない。
As a result, it is possible to reduce the allowable value α, which has conventionally been required to be large in consideration of the variation in the workpiece diameter, and the grinding cycle time can be shortened accordingly. Further, a contact detector such as an AE sensor for detecting the contact between the grindstone and the workpiece is not required, which can prevent the cost increase of the apparatus. Further, in the above-described embodiment, since step S6 is performed in parallel with steps S1 to S3, the cycle time does not become long due to the workpiece diameter measurement.

【0035】なお、上記実施例では、加工開始前の工作
物Wの被研削部径を測定するとき、工作物Wの黒皮によ
って一対のフィーラ20aが損傷しないように工作物W
の回転を停止した状態で測定する場合について述べた
が、本発明はこれに限定されない。例えば工作物Wを主
軸台15により回転させた状態で工作物径を測定するよ
うにしてもよい。この場合、工作物Wを回転することに
より、センタずれなどによる工作物の振れ量を含む値が
測定されるため、さらに精度の高い砥石台の早送り前進
のための位置決めが可能になる。
In the above embodiment, when measuring the diameter of the portion to be ground of the workpiece W before the start of machining, the workpiece W should be prevented from being damaged by the black skin of the workpiece W.
Although the case where the measurement is performed in the state in which the rotation is stopped is described, the present invention is not limited to this. For example, the workpiece diameter may be measured while the workpiece W is rotated by the headstock 15. In this case, by rotating the workpiece W, a value including the amount of shake of the workpiece due to a center shift or the like is measured, and therefore, it is possible to perform positioning with higher accuracy for rapid advance of the wheel head.

【0036】また、上記実施例では、加工開始前の工作
物径を測定した後、工作物径測定装置20を一旦退避さ
せる場合について述べたが、本発明はこれに限定されな
い。また、本発明は、上記実施例に示す構成のものに限
定されず、請求項に記載した範囲を逸脱しない限り、種
々に変形、変更し得る。
In the above embodiment, the case where the workpiece diameter measuring device 20 is temporarily retracted after the workpiece diameter is measured before the start of machining has been described, but the present invention is not limited to this. Further, the present invention is not limited to the configurations shown in the above embodiments, and can be variously modified and changed without departing from the scope described in the claims.

【0037】[0037]

【発明の効果】以上説明したように本発明によれば、工
作物の基準端面検出のテーブル割出しと並行して、加工
開始前の工作物径を工作物径測定手段により測定し、こ
の測定径を基に、砥石車と工作物とを必要最小限の位置
まで接近させるための砥石台の早送り位置を算出し、こ
の算出した値にしたがって砥石台を早送り前進させた
後、研削加工へ移行させる構成にしたので、研削加工サ
イクルが長くなるおそれがなく、しかも加工開始前の工
作物径のバラツキに関係なく、砥石車と工作物との間隔
が常に必要最小限となる状態に砥石台を早送り前進させ
ることができ、これによって研削加工サイクルタイムを
短縮することができる。
As described above, according to the present invention, the workpiece diameter before the start of machining is measured by the workpiece diameter measuring means in parallel with the table indexing for detecting the reference end surface of the workpiece, and this measurement is performed. Based on the diameter, calculate the rapid traverse position of the grinding wheel head to bring the grinding wheel and the workpiece close to the required minimum position, advance the wheel head forward according to the calculated value, and then shift to the grinding process. With this configuration, the grinding cycle is not likely to be long, and the grinding wheel head is always placed in a state where the distance between the grinding wheel and the workpiece is always the minimum necessary regardless of the variation in the workpiece diameter before the start of processing. It is possible to advance fast forward, which can shorten the grinding cycle time.

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

【図1】本発明に係る研削装置の一実施例を示す全体の
構成図である。
FIG. 1 is an overall configuration diagram showing an embodiment of a grinding apparatus according to the present invention.

【図2】本実施例における工作物径測定装置の詳細を示
す側面図である。
FIG. 2 is a side view showing details of the workpiece diameter measuring apparatus in the present embodiment.

【図3】本実施例における研削サイクルの動作手順を示
すフローチャートである。
FIG. 3 is a flow chart showing an operation procedure of a grinding cycle in the present embodiment.

【図4】本実施例における工作物に対する砥石台の早送
り量と算出関係を示す説明図である。
FIG. 4 is an explanatory diagram showing a rapid feed amount of a grinding stone head with respect to a workpiece and a calculation relationship in the present embodiment.

【図5】研削加工サイクルを示す説明図である。FIG. 5 is an explanatory diagram showing a grinding cycle.

【符号の説明】[Explanation of symbols]

10 研削盤 11 べッド 12 工作物テーブル 13 砥石台 14 サーボモータ(第2駆動手段) 15 主軸台 16 心押台 20 工作物径測定装置 21 端面検出装置 23 砥石車 27 サーボモータ(第1駆動手段) 27a エンコーダ(位置検出手段) 40 数値制御装置 41 CPU 42 メモリ 10 Grinding machine 11 Bed 12 Workpiece table 13 Grindstone base 14 Servomotor (second drive means) 15 Headstock 16 Tailstock 20 Workpiece diameter measuring device 21 End face detection device 23 Grindstone wheel 27 Servomotor (first drive) Means) 27a Encoder (position detection means) 40 Numerical control device 41 CPU 42 Memory

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ベッドと、このベッド上に設けられ回転
駆動される砥石車を有する砥石台と、ベッド上に設けら
れたテーブルと、このテーブル上に設けられ基準端面を
有する工作物を回転駆動する主軸台と、前記砥石車によ
り研削される工作物と砥石車とが接離する方向に前記砥
石台を移動させる第1駆動手段と、前記テーブルを工作
物の回転軸線方向に移動させる第2駆動手段と、前記砥
石台の位置を検出する位置検出手段と、前記工作物の径
を計測する工作物径測定手段と、前記ベッド上に設けら
れ前記工作物の基準端面を検出する端面検出手段と、前
記第2駆動手段を制御することでテーブルを移動させ、
工作物の基準端面を端面検出手段にて検出した時点でテ
ーブルの移動を停止し、前記第1駆動手段を制御するこ
とで砥石台を早送り前進させ、続いて研削送りする加工
制御手段とを備えた研削装置において、前記加工制御手
段で制御される第2駆動手段によってテーブルを移動さ
せ、工作物の基準端面を端面検出手段にて検出する動作
と並行して前記工作物径測定手段にて工作物の径を測定
し、この測定値を基に前記砥石台と工作物とを必要最小
限の位置まで接近させるための早送り前進位置を演算す
る測定演算手段を備えたことを特徴とする研削装置。
1. A bed, a grindstone having a grinding wheel provided on the bed and driven to rotate, a table provided on the bed, and a workpiece having a reference end surface provided on the table, which is driven to rotate. A headstock, a first drive means for moving the grindstone in a direction in which the workpiece to be ground by the grindstone and the grindstone come into contact with each other, and a second moving means for moving the table in the rotational axis direction of the workpiece. Driving means, position detecting means for detecting the position of the grindstone, workpiece diameter measuring means for measuring the diameter of the workpiece, and end face detecting means provided on the bed for detecting a reference end face of the workpiece. And moving the table by controlling the second driving means,
And a machining control means for stopping the movement of the table when the reference end face of the workpiece is detected by the end face detection means and for controlling the first drive means to advance the grindstone head forward and then feed the grinding. In the grinding apparatus, the table is moved by the second drive means controlled by the processing control means, and the workpiece diameter measuring means performs the work in parallel with the operation of detecting the reference end face of the work by the end face detecting means. A grinding machine characterized by comprising a measurement calculation means for measuring a diameter of an object and calculating a fast-forward advance position for approaching the grindstone base and the workpiece to a necessary minimum position based on the measured value. .
JP9739993A 1993-04-23 1993-04-23 Grinding equipment Expired - Fee Related JP3168767B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9739993A JP3168767B2 (en) 1993-04-23 1993-04-23 Grinding equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9739993A JP3168767B2 (en) 1993-04-23 1993-04-23 Grinding equipment

Publications (2)

Publication Number Publication Date
JPH06304861A true JPH06304861A (en) 1994-11-01
JP3168767B2 JP3168767B2 (en) 2001-05-21

Family

ID=14191445

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9739993A Expired - Fee Related JP3168767B2 (en) 1993-04-23 1993-04-23 Grinding equipment

Country Status (1)

Country Link
JP (1) JP3168767B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009285781A (en) * 2008-05-29 2009-12-10 Okuma Corp Working method of inside diameter of workpiece in compound working machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69807099T2 (en) 1997-09-30 2002-12-05 Ricoh Kk IMAGE GENERATION METHOD AND DEVICE AND CLEANING DEVICE THEREFOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009285781A (en) * 2008-05-29 2009-12-10 Okuma Corp Working method of inside diameter of workpiece in compound working machine

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