JPH06246613A - Grinding method - Google Patents
Grinding methodInfo
- Publication number
- JPH06246613A JPH06246613A JP25622592A JP25622592A JPH06246613A JP H06246613 A JPH06246613 A JP H06246613A JP 25622592 A JP25622592 A JP 25622592A JP 25622592 A JP25622592 A JP 25622592A JP H06246613 A JPH06246613 A JP H06246613A
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- grindstone
- workpiece
- outer diameter
- groove
- 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
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、被加工物の円柱状ま
たは円筒状の外径部と、インプロセス測定が不可能また
は困難な部分とを、連続して研削する研削方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding method for continuously grinding a cylindrical or cylindrical outer diameter portion of a workpiece and a portion where in-process measurement is impossible or difficult. .
【０００２】[0002]
【従来の技術】自動車のパワーステアリング装置のロー
タリ型コントロールバルブに用いるバルブシャフトを被
加工物とする、従来例の研削方法を図７について説明す
る。被加工物１の円柱状部１ａの表面に軸方向に沿う溝
２を８箇所に予め形成し、次に、被加工物１の両端部に
設けたセンタ孔３を研削する。その後、被加工物１の
円柱状部１ａの溝２を有する部分およびベアリング組付
部分１ｂに荒研削用砥石４によって外径荒研削をし、
前記円柱状部１ａの溝２を有する部分などを仕上げ研削
用砥石５によって外径仕上げ研削し、図８にも示すよ
うに、円柱状部１ａの溝２の両側部分に面取り用砥石６
によって面取り研削をしている。2. Description of the Related Art A conventional grinding method using a valve shaft used in a rotary type control valve of an automobile power steering apparatus as a workpiece will be described with reference to FIG. Grooves 2 along the axial direction are formed in advance on the surface of the cylindrical portion 1a of the workpiece 1 at eight locations, and then the center holes 3 provided at both ends of the workpiece 1 are ground. After that, the portion having the groove 2 of the cylindrical portion 1a of the workpiece 1 and the bearing assembly portion 1b are subjected to outer diameter rough grinding by the rough grinding wheel 4.
The portion having the groove 2 of the cylindrical portion 1a is subjected to outer diameter finish grinding with a grinding stone 5 for finish grinding, and as shown in FIG. 8, chamfering grinding stones 6 are formed on both sides of the groove 2 of the cylindrical portion 1a.
Is chamfered and ground.
【０００３】前記，，の各工程は、荒研削盤、仕
上げ研削盤、面取り研削盤の３台の研削盤を用い、前記
の工程順に加工を行っている。そして、の面取り研削
は、インプロセス測定が不可能であるため、の仕上げ
研削工程で加工した外径寸法を接触式のＡＥセンサ７に
よって検知し、この検知結果に基づいて砥石台の熱変位
を補正して行っている。In each of the above steps, a rough grinding machine, a finish grinding machine, and a chamfering grinder are used, and processing is performed in the order of the above steps. In chamfering grinding, since in-process measurement is impossible, the outer diameter dimension processed in the finishing grinding step is detected by the contact type AE sensor 7, and the thermal displacement of the grinding wheel head is detected based on this detection result. I am making corrections.
【０００４】[0004]
【発明が解決しようとする課題】前述した従来の研削方
法は、外径仕上げ研削と、溝の両側部分の面取り研削と
の両工程を、別個の研削盤で行っているため、被加工物
の着脱の際にアライメント不良が発生する。このアライ
メント不良は、面取り研削盤による面取り加工時に、被
加工物の外径の振れとなり、この振れが熱変位による誤
差に加わるため、大きな補正が必要となる。また、図８
に示すように、クーラントなどのノイズによってＡＥセ
ンサ７の検知精度に限界があるため、接触検知位置に誤
差が生じ、溝２の両側部分の面取り研削時に、溝２の面
取り幅寸法の誤差などによって不良品が発生するという
問題点があった。In the above-described conventional grinding method, both the steps of the outer diameter finish grinding and the chamfering grinding of both sides of the groove are performed by separate grinders, so that the workpiece to be processed is Alignment failure occurs when attaching and detaching. This misalignment causes deflection of the outer diameter of the workpiece during chamfering by the chamfering grinder, and this deflection adds to the error due to thermal displacement, and thus requires a large correction. Also, FIG.
As shown in FIG. 3, noise such as coolant limits the detection accuracy of the AE sensor 7, and therefore an error occurs in the contact detection position, and when chamfering and grinding both sides of the groove 2, an error in the chamfer width dimension of the groove 2 causes an error. There is a problem that defective products occur.
【０００５】この発明は、前述した問題点を解決し、被
加工物のアライメント不良をなくして溝の両側部分の面
取り幅の寸法誤差および精度不良をなくすと共に、１台
の研削盤によって被加工物の外径部、およびインプロセ
ス測定が不可能または困難な部分に高精度の研削加工が
でき、設備コストも低減できる、研削方法を提供するこ
とを目的とするものである。The present invention solves the above-mentioned problems, eliminates alignment errors of the work piece to eliminate dimensional errors in chamfer widths on both sides of the groove and poor accuracy, and also allows the work piece to be machined by one grinder. It is an object of the present invention to provide a grinding method capable of performing highly accurate grinding processing on the outer diameter portion and a portion where in-process measurement is impossible or difficult, and can reduce equipment cost.
【０００６】[0006]
【課題を解決するための手段】この発明による研削方法
は、砥石台に設けた砥石によって被加工物の外径部を研
削し、続いて前記砥石によって前記被加工物のインプロ
セス測定が不可能または困難な部分を研削する研削方法
にして、前記外径部が所定の仕上げ径に研削されたこと
を定寸装置によって検出されたときの前記砥石台の位置
を基準にして、インプロセス測定が不可能または困難な
部分の研削の切込みを行うものである。In the grinding method according to the present invention, an outer diameter portion of a workpiece is ground by a grindstone provided on a grindstone base, and subsequently, in-process measurement of the workpiece is impossible by the grindstone. Or as a grinding method for grinding a difficult portion, the in-process measurement is based on the position of the wheel head when the sizing device detects that the outer diameter portion has been ground to a predetermined finish diameter. It is used to make grinding cuts in impossible or difficult parts.
【０００７】[0007]
【作用】この発明の研削方法は、被加工物の外径部と、
インプロセス測定が不可能または困難な部分との研削
を、１台の研削盤のテーブルに被加工物を装着したまま
行うので、従来のように、２台の研削盤のテーブルに被
加工物を着脱してそれぞれの研削するのと異なり、被加
工物の着脱時に発生する被加工物のアライメント不良が
なくなり、同軸度が向上する。このため、インプロセス
測定が不可能または困難な部分の研削加工時に被加工物
の外径振れを原因とする精度不良がなくなり、高精度の
加工ができる。According to the grinding method of the present invention, the outer diameter portion of the workpiece is
Grinding with in-process measurement impossible or difficult part is performed with the work piece mounted on the table of one grinder, so that the work piece can be placed on the table of two grinders as before. Unlike attachment and detachment and grinding each, there is no alignment failure of the work piece that occurs when attaching or detaching the work piece, and the coaxiality is improved. For this reason, when grinding a portion where in-process measurement is impossible or difficult, there is no accuracy defect due to outer diameter runout of the workpiece, and high-precision machining is possible.
【０００８】また、被加工物の外径部に対する研削時に
用いる定寸装置は、ノイズの影響が少ないものを使用で
き、このため外径部の研削後の仕上げ径を正確に測定す
ることができ、砥石台の熱変位の補正を正確に行うこと
ができる。そして、被加工物のインプロセス測定が不可
能または困難な部分は、この砥石台の熱変位補正をした
砥石で研削加工を行うので、加工精度が向上する。Further, as the sizing device used for grinding the outer diameter portion of the work piece, one having less influence of noise can be used, so that the finished diameter of the outer diameter portion after grinding can be accurately measured. Therefore, the thermal displacement of the grinding wheel head can be accurately corrected. Then, since the in-process measurement of the work piece is impossible or difficult, the grinding is performed with the grindstone whose thermal displacement is corrected, and thus the working accuracy is improved.
【０００９】さらに、従来は２台用いていた研削盤が、
この発明では１台の研削盤ですむので、設備コストを低
減できる。Further, the grinder which has conventionally used two units,
In this invention, since only one grinding machine is required, equipment cost can be reduced.
【００１０】[0010]
【実施例】以下、この発明の実施例につき図を参照して
説明する。図１はこの発明の第１実施例による研削方法
を行う複合研削盤を示す。図１において、１１はベッド
であり、ベッド１１上には、テーブル１２を設けると共
に、外径荒研削用の第１砥石台１３と、外径仕上げ兼面
取り研削用の第２砥石台１４とを、左，右に並べて設
け、複合研削盤をデュアルヘッド構成にしてある。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a compound grinding machine for carrying out a grinding method according to a first embodiment of the present invention. In FIG. 1, 11 is a bed, and a table 12 is provided on the bed 11, and a first grindstone base 13 for outer diameter rough grinding and a second grindstone base 14 for outer diameter finishing and chamfering grinding are provided. , The left and right are arranged side by side, and the compound grinder has a dual head configuration.
【００１１】テーブル１２は、ベッド１１に設けたテー
ブル移動用サーボモータ１５の駆動によって送りねじ軸
１６を介しＺ軸（左右）方向に往復移動するように構成
されている。テーブル１２上には主軸台１７と心押台１
８とが設けられ、これらの間に被加工物１が着脱可能に
保持されている。この被加工物１は、パワーステアリン
グ装置のロータリ型コントロールバルブに用いるバルブ
シャフトである。The table 12 is configured to reciprocate in the Z-axis (left and right) direction via the feed screw shaft 16 by driving a table moving servomotor 15 provided on the bed 11. On the table 12, a headstock 17 and a tailstock 1
8 is provided, and the workpiece 1 is detachably held between them. The workpiece 1 is a valve shaft used for a rotary control valve of a power steering device.
【００１２】前記主軸台１７には、主軸回転用サーボモ
ータ１９の駆動によって回転する主軸２０、および主軸
２０から被加工物１に回転力を伝達する駆動金具２１が
設けられ、主軸回転用モータ１９には主軸２０の回転検
出用エンコーダ２２が付設されている。なお、３３，３
４は主軸側，心押台側センタである。The spindle head 17 is provided with a spindle 20 that is rotated by the driving of a spindle rotation servomotor 19, and a drive fitting 21 that transmits a rotational force from the spindle 20 to the workpiece 1, and the spindle rotation motor 19 is provided. An encoder 22 for detecting the rotation of the main shaft 20 is attached to this. 33,3
Reference numeral 4 is a center on the spindle side and a tailstock side.
【００１３】前記第１，第２砥石台１３，１４は、ベッ
ド１１に設けた第１，第２砥石台移動用サーボモータ２
３，２４の駆動によって送りねじ軸２５，２６を介しＸ
軸（前後）方向に往復移動するようにそれぞれ構成さ
れ、このサーボモータ２３，２４には、サーボモータ２
３，２４の回転を検出するエンコーダ２３ａ，２４ａが
設けられている。また、第１，第２砥石軸駆動装置２
７，２８によって回転する第１，第２砥石軸２９，３０
に第１，第２砥石３１，３２がそれぞれ着脱可能に嵌合
固定されている。The first and second grinding wheel heads 13 and 14 are the servomotors 2 for moving the first and second wheel heads provided on the bed 11.
3 and 24 drive to feed screw shafts 25 and 26
The servomotors 23 and 24 are configured to reciprocate in the axial (front-back) direction.
Encoders 23a and 24a for detecting the rotations of 3 and 24 are provided. In addition, the first and second grindstone shaft drive devices 2
First and second whetstone shafts 29, 30 rotated by 7, 28
The first and second grindstones 31 and 32 are detachably fitted and fixed.
【００１４】第１，第２砥石軸２９，３０は、相対向し
て第１，第２砥石台１３，１４の左，右にそれぞれ突出
し、第１，第２砥石３１，３２と共にテーブル１２の移
動方向と平行に配置されている。第１砥石３１は荒研削
用、第２砥石３２は仕上げ研削兼面取り研削用であり、
第２砥石３２は、第１砥石３１より小外径にすると共
に、被加工物１の溝２の長さとほぼ等しい軸方向長さに
してある。The first and second grindstone shafts 29 and 30 are opposed to each other and project to the left and right of the first and second grindstone bases 13 and 14, respectively, and together with the first and second grindstones 31 and 32 of the table 12. It is arranged parallel to the moving direction. The first grindstone 31 is for rough grinding, the second grindstone 32 is for finish grinding and chamfering grinding,
The second grindstone 32 has a smaller outer diameter than the first grindstone 31 and has an axial length substantially equal to the length of the groove 2 of the workpiece 1.
【００１５】また、４０は数値制御装置であり、この制
御装置４０には、中央処理装置（ＣＰＵ）４１、メモリ
４２およびインタフェイス４３，４４が設けられてい
る。一方のインタフェイス４３には、第１，第２砥石台
位置制御用の駆動回路４５，４６、テーブル位置制御用
の駆動回路４７および主軸回転制御用の駆動回路４８を
設け、これらの駆動回路４５，４６，４７および４８に
よって前記サーボモータ２３，２４，１５および１９を
それぞれ制御するように構成され、一方のインタフェイ
ス４３には、前記エンコーダ２２，２３ａ，２４ａ、お
よびテーブル１２の適所に設けた定寸装置４９からの測
定値をそれぞれ入力するように構成され、他方のインタ
フェイス４４はキーボード５０に接続されている。Reference numeral 40 denotes a numerical controller, which is provided with a central processing unit (CPU) 41, a memory 42 and interfaces 43 and 44. One interface 43 is provided with drive circuits 45 and 46 for controlling the positions of the first and second grinding wheels, a drive circuit 47 for controlling the table position, and a drive circuit 48 for controlling the spindle rotation, and these drive circuits 45 are provided. , 46, 47 and 48 are used to control the servomotors 23, 24, 15 and 19, respectively, and one interface 43 is provided in the encoder 22, 23a, 24a and the table 12 at appropriate positions. The interface 44 is connected to a keyboard 50, each of which is configured to input a measured value from the sizing device 49.
【００１６】次に、前述した構成の研削盤を用いて行う
この発明の一実施例による研削方法について説明する。
前述した従来例と同様に、被加工物１に溝２を形成し、
両端部に設けたセンタ孔３（図２参照）を別の研削盤を
用いて研削した後、主軸側センタ３３と心押台センタ３
４とにセンタ孔３をそれぞれ係合支持させて、被加工物
１をテーブル１２に着脱可能に保持させる。そして、第
１砥石台１３は、第１砥石３１を被加工物１の溝２を形
成した部分と対向させてこの部分の後方に位置させ、第
２砥石台３２は後退させておく。Next, a grinding method according to an embodiment of the present invention, which is carried out by using the grinding machine having the above-mentioned structure, will be described.
Similar to the conventional example described above, the groove 2 is formed in the workpiece 1,
After grinding the center holes 3 (see FIG. 2) provided at both ends with another grinder, the spindle side center 33 and tailstock center 3
The center hole 3 is engaged with and supported by 4 and 4, respectively, and the workpiece 1 is detachably held on the table 12. Then, the first grindstone 13 makes the first grindstone 31 face the portion of the workpiece 1 in which the groove 2 is formed and positions it behind this portion, and the second grindstone 32 is retracted.
【００１７】この状態で、図３に示すフローチャートに
したがって、荒研削、仕上げ研削および溝の両側部分の
面取り研削を順次行う。まず、キーボード５０の操作に
よって数値制御装置４０を動作させ、主軸回転用サーボ
モータ１９の駆動によって被加工物１を軸回りに回転さ
せると共に、第１砥石軸駆動装置２７の駆動によって荒
研削用の第１砥石３１を軸回りに回転させつつ、第１砥
石台移動用サーボモータ２３の駆動によって第１砥石台
１３および第１砥石３１を第１砥石軸２９と直交するＸ
方向に前進させ、図２の実線に示すように、第１砥石３
１の外周面を被加工物１の円柱状部１ａの溝２を形成し
た部分およびベアリング組付部分１ｂの外径部に接触さ
せて荒研削を行う。In this state, rough grinding, finish grinding, and chamfering grinding of both sides of the groove are sequentially performed according to the flowchart shown in FIG. First, the numerical control device 40 is operated by operating the keyboard 50, the workpiece 1 is rotated around the axis by driving the servomotor 19 for rotating the spindle, and the rough grinding is performed by driving the first grindstone shaft driving device 27. While rotating the first grindstone 31 about the axis, the first grindstone 13 and the first grindstone 31 are driven by the servomotor 23 for moving the first grindstone head so that the first grindstone 13 and the first grindstone 31 are orthogonal to the first grindstone axis 29.
Direction, and as shown by the solid line in FIG.
Rough grinding is performed by bringing the outer peripheral surface of No. 1 into contact with the grooved portion of the cylindrical portion 1a of the workpiece 1 and the outer diameter portion of the bearing assembly portion 1b.
【００１８】以下の説明において、設定値とは、あらか
じめメモリ４２に記憶させた被加工物１の仕上げ寸法の
値をいう。また、計測値とは、定寸装置４９で測定した
被加工物１の研削部の外径の値をいう。また、座標値と
は、サーボモータ２３，２４の回転を検出するエンコー
ダ２３ａ，２４ａの値から求めた砥石台１３，１４の位
置を示した値をいう。In the following description, the set value means the value of the finishing dimension of the workpiece 1 stored in the memory 42 in advance. Further, the measured value means the value of the outer diameter of the ground portion of the workpiece 1 measured by the sizing device 49. Further, the coordinate value means a value indicating the position of the wheel heads 13 and 14 obtained from the values of the encoders 23a and 24a that detect the rotations of the servo motors 23 and 24.
【００１９】前記荒研削は、数値制御装置４０のメモリ
４２に記憶された荒研削用の第１設定値まで、中央処理
装置４１からの信号によって行う。すなわち、荒研削が
第１設定値に達したことを、定寸装置４９で検出した第
１計測値によって検知される。その後、この第１計測値
とエンコーダ２３ａから得られた第１砥石台１３の位置
を示した第１座標値とを、中央処理装置４１で比較して
差を算出し、この差を第１座標値に加え、第１砥石台１
３などの熱変位を補正し、荒研削の寸法管理をインプロ
セス測定によって行い、荒研削工程を終了させる。The rough grinding is performed by a signal from the central processing unit 41 up to the first set value for rough grinding stored in the memory 42 of the numerical controller 40. That is, the fact that the rough grinding has reached the first set value is detected by the first measurement value detected by the sizing device 49. Thereafter, the central processing unit 41 compares the first measurement value and the first coordinate value indicating the position of the first grindstone 13 obtained from the encoder 23a to calculate the difference, and the difference is calculated as the first coordinate. In addition to the value, the 1st wheel head 1
The thermal displacement such as 3 is corrected, the dimension control of the rough grinding is performed by the in-process measurement, and the rough grinding step is completed.
【００２０】荒研削工程で砥石台１３の熱変位補正する
のは、次の被加工物１の荒研削を行う時、砥石の早送り
前進端を被加工物１に対して一定にすることができ、荒
研削の研削時間のばらつきを小さくすることができる。The thermal displacement of the grindstone base 13 is corrected in the rough grinding step so that the rapid forward advance end of the grindstone can be made constant with respect to the work piece 1 when the next work piece 1 is roughly ground. Therefore, it is possible to reduce variations in the grinding time of rough grinding.
【００２１】次に、第１砥石台１３を荒研削開始前の位
置に後退させて停止させると共に、第１砥石３１の回転
を停止させる。第１砥石台１３の後退開始に若干遅れ
て、テーブル移動用サーボモータ１５を駆動させて、テ
ーブル１２を図１の右方に移動させ、後退している第２
砥石３２と被加工物１の円柱状部１ａとを対向させる。Next, the first grindstone base 13 is moved back to the position before the start of rough grinding and stopped, and the rotation of the first grindstone 31 is stopped. The table moving servo motor 15 is driven to move the table 12 to the right in FIG. 1 a little later than the start of the retreat of the first whetstone 13, and the table 2 is moved backward.
The grindstone 32 and the cylindrical portion 1a of the workpiece 1 are opposed to each other.
【００２２】この状態で、第２砥石軸駆動装置２８を駆
動させて仕上げ研削兼面取り研削用の第２砥石３２を回
転させつつ、第２砥石台移動用サーボモータ２４の駆動
によって第２砥石台１４および第２砥石３２を第２砥石
軸３０と直交するＸ方向に前進させ、図２の一点鎖線に
示すように、第２砥石３２の外周面を被加工物１の円柱
状部１ａの溝２を有する部分の外径部に接触させ、テー
ブル１２をＺ軸方向に往復移動させつつ仕上げ研削を行
う。In this state, the second grindstone head drive device 28 is driven to rotate the second grindstone 32 for finish grinding and chamfering grinding, while the second grindstone head moving servo motor 24 drives the second grindstone head. 14 and the second grindstone 32 are advanced in the X direction orthogonal to the second grindstone axis 30, and the outer peripheral surface of the second grindstone 32 is formed into the groove of the cylindrical portion 1a of the workpiece 1 as shown by the alternate long and short dash line in FIG. 2 is brought into contact with the outer diameter portion of the portion having 2 and the table 12 is reciprocally moved in the Z-axis direction to perform finish grinding.
【００２３】この仕上げ研削は、メモリ４２に記憶され
た仕上げ研削用の第２設定値まで、中央処理装置４１か
らの信号によって行う。すなわち、仕上げ研削が第２設
定値に達したことを、定寸装置４９で検出した第２計測
値によって検知される。その後、この第２計測値とエン
コーダ２４ａから得られた第３砥石台１４の位置を示し
た第２座標値とを、中央処理装置４１で比較して差を算
出し、この差を第２座標値に加え、第２砥石台１４など
の熱変位を補正し、仕上げ研削の寸法管理をインプロセ
ス測定によって行い、仕上げ研削工程を終了させる。This finishing grinding is performed by the signal from the central processing unit 41 up to the second setting value for finishing grinding stored in the memory 42. That is, the fact that the finish grinding has reached the second set value is detected by the second measurement value detected by the sizing device 49. Thereafter, the second processing value and the second coordinate value indicating the position of the third grindstone 14 obtained from the encoder 24a are compared by the central processing unit 41 to calculate a difference, and the difference is calculated as the second coordinate. In addition to the value, the thermal displacement of the second grinding wheel head 14 and the like is corrected, the dimension control of the finish grinding is performed by the in-process measurement, and the finish grinding step is completed.
【００２４】続いて、被加工物１のインプロセス測定が
不可能な部分、具体的には被加工物１の円柱状部１ａに
形成した溝２の両側部分の面取り研削をする。この面取
り研削は、第２砥石台１４をＸ軸方向に後退させて、第
２砥石３２を被加工物１の外周面と離間させ、テーブル
１２をＺ軸方向に移動させることで、被加工物１の溝２
と第２砥石３２とを正対させる（図２の一点鎖線、図４
参照）。Subsequently, chamfering grinding is performed on a portion of the workpiece 1 where the in-process measurement is impossible, specifically, both sides of the groove 2 formed in the cylindrical portion 1a of the workpiece 1. In this chamfering grinding, the second grindstone base 14 is retracted in the X-axis direction, the second grindstone 32 is separated from the outer peripheral surface of the workpiece 1, and the table 12 is moved in the Z-axis direction. Groove 1
And the second whetstone 32 face each other (see the alternate long and short dash line in FIG. 2, FIG.
reference).
【００２５】次に、主軸回転用サーボモータ１９による
被加工物１のＣ軸回りの回転と、第２砥石台移動用サー
ボモータ２４による第２砥石台１４および第２砥石３２
のＸ軸方向への移動によるＣ−Ｘ軸同時制御によって、
図４に示すように、第２砥石３２で被加工物１の溝２の
両側部分を溝２の幅方向中央２ａを基準として対称に行
う。Next, rotation of the workpiece 1 around the C axis by the spindle rotation servomotor 19 and the second grinding wheel mount 14 and the second grinding wheel 32 by the second grinding wheel moving servomotor 24.
C-X axis simultaneous control by moving the X axis direction,
As shown in FIG. 4, the second grindstone 32 is used to symmetrically perform both side portions of the groove 2 of the workpiece 1 with the center 2a in the width direction of the groove 2 as a reference.
【００２６】この面取り研削は、前記基準位置２ａから
Ｃ軸回りに反時計方向と時計方向とに被加工物１を回転
させて、溝２の一側部分と他側部分とに分けて行い、あ
るいは被加工物１を一方向に回転させ、基準位置２ａの
図４左，右での研削誤差を修正しつつ、被加工物１の溝
２の両側部分を高精度に対称形になるように面取り加工
する。This chamfering grinding is performed by rotating the workpiece 1 in the counterclockwise and clockwise directions about the C axis from the reference position 2a to divide the groove 2 into one side portion and the other side portion, Alternatively, the workpiece 1 may be rotated in one direction to correct the grinding error at the reference position 2a at the left and right of FIG. 4 and to make the both sides of the groove 2 of the workpiece 1 highly symmetrical. Chamfer.
【００２７】なお、被加工物１の全部の溝２、すなわち
被加工物１の円周方向８箇所に設けた溝２の両側部分に
それぞれ面取り加工を行うが、これらの加工は、全部の
溝２の一側部分を研削した後、全部の溝２の他側部分を
研削する方法、１箇所の溝２の一側部分を研削した後、
この溝２の他側部分を研削することを、８箇所の溝２に
対し順次行う方法などがある。Chamfering is performed on all the grooves 2 of the work piece 1, that is, on both sides of the groove 2 provided at eight locations in the circumferential direction of the work piece 1, respectively. Method of grinding the other side part of all the grooves 2 after grinding one side part of 2, after grinding the one side part of the groove 2 at one place,
There is a method of sequentially grinding the other side portion of the groove 2 with respect to the grooves 2 at eight locations.
【００２８】被加工物１の全部の溝２の両側部分の面取
加工を完了した後、第２砥石台１４を仕上げ研削を行う
以前の位置に復帰させ、第２砥石３２の回転を停止させ
ると共に、テーブル１２を荒研削を行う以前の位置に復
帰させ、主軸２０の回転を停止させる。その後、主軸側
センタ３３と心押台側センタ３４とによる研削加工完了
後の被加工物１の保持を解除し、この被加工物１をテー
ブル１２外に搬出し、未加工の被加工物を前記センタ３
３，３４によって着脱可能にテーブル１２上に装着し、
以後前述した研削加工を未加工の被加工物に行うこと
を、繰り返す。After the chamfering of both sides of all the grooves 2 of the workpiece 1 is completed, the second grindstone base 14 is returned to the position before the finish grinding, and the rotation of the second grindstone 32 is stopped. At the same time, the table 12 is returned to the position before the rough grinding, and the rotation of the spindle 20 is stopped. After that, the holding of the work piece 1 after completion of the grinding work by the spindle side center 33 and the tailstock side center 34 is released, the work piece 1 is carried out of the table 12, and the unprocessed work piece is removed. Center 3
3, 34 is detachably mounted on the table 12,
Thereafter, the above-described grinding process is repeated on the unprocessed workpiece.
【００２９】前述したように、第１実施例では、１台の
研削盤に設けた第１砥石３１によって被加工物１に荒研
削を行った後、第２砥石３２によって仕上げ研削と溝２
の両側部分の研削とを行っているので、３台の研削盤に
被加工物を順次付け替える、従来の研削方法に比べ、研
削を能率よく行うことができ、被加工物を付け替えず
に、荒研削、仕上げ研削、面取り研削を能率よく行える
と共に、設備コストを低減できる。As described above, in the first embodiment, the workpiece 1 is roughly ground by the first grindstone 31 provided on one grinder, and then the second grindstone 32 is used for the finish grinding and the groove 2.
Since both sides are grinded, the work pieces are sequentially replaced on three grinders. Compared with the conventional grinding method, grinding can be performed more efficiently, and the work pieces are not It is possible to efficiently perform grinding, finish grinding, and chamfering grinding, and reduce equipment costs.
【００３０】また、第１実施例では、１台の研削盤のテ
ーブル１２に被加工物１を装着したままで、前述した３
種類の研削加工を行うことができ、従来例のような被加
工物の着脱時に発生するアライメント不良がなくなり、
同軸度が向上するため、仕上げ研削および溝の両側部分
の研削加工中に被加工物の外径振れを原因とする精度不
良がなくなり、とくに溝２の両側部分の面取り研削時
に、面取り幅の精度が向上する。Further, in the first embodiment, the above-mentioned 3 is performed while the work piece 1 is mounted on the table 12 of one grinder.
It is possible to perform various types of grinding processing, eliminating the alignment failure that occurs when attaching and detaching the workpiece as in the conventional example.
Since the concentricity is improved, the accuracy defect due to the outer diameter runout of the work piece during finish grinding and grinding of both sides of the groove is eliminated, and the accuracy of the chamfer width is particularly high when chamfering the both sides of the groove 2. Is improved.
【００３１】さらに、テーブル１２に設けた１つの定寸
装置４９の信号に基づき、荒研削，仕上げ研削時の第
１，第２砥石台１３，１４の熱変位をインプロセス測定
によって補正でき、構造が簡単になる。さらに、第２砥
石３２で被加工物の外径を所定の仕上げ径に研削された
ことを、ノイズの影響が少ない定寸装置４９を使用して
正確に検知して、定寸装置４９で検出した第２計測値
と、第２砥石台１４の位置を示す第２座標値とを比較し
て、第２砥石台１４の熱によって生じた変位を正確に得
ることができるため、熱変位の補正誤差が減少し、引き
続いて、第２砥石台１４の砥石３２で行うインプロセス
測定が不可能な溝２の両側部分の面取り研削時の形状精
度が向上する。Further, based on the signal of one sizing device 49 provided on the table 12, the thermal displacement of the first and second grinding wheel heads 13 and 14 during rough grinding and finish grinding can be corrected by in-process measurement, and the structure Will be easier. Further, the fact that the outer diameter of the workpiece has been ground to the predetermined finish diameter by the second grindstone 32 is accurately detected by using the sizing device 49 which is less affected by noise, and detected by the sizing device 49. Since the second measurement value and the second coordinate value indicating the position of the second grinding wheel base 14 are compared with each other, the displacement caused by the heat of the second grinding wheel base 14 can be accurately obtained. The error is reduced, and subsequently, the shape accuracy at the time of chamfering and grinding the both sides of the groove 2 where the in-process measurement performed by the grindstone 32 of the second grindstone 14 is impossible is improved.
【００３２】そして、被加工物１の外径部の荒加工時
に、ベアリング組付部１ｂも加工するため、この組付部
１ｂと溝２の両側部分の面取り加工部分との同軸度が向
上し、バルブシャフトである被加工物１にコントロール
バルブを組み付けた後のバルブ特性が向上する。Since the bearing assembly portion 1b is also machined during rough machining of the outer diameter portion of the workpiece 1, the concentricity between this assembly portion 1b and the chamfered portions on both sides of the groove 2 is improved. The valve characteristics after assembling the control valve to the workpiece 1 which is the valve shaft are improved.
【００３３】この発明の第２実施例による研削方法につ
き、図５を参照して説明する。図５において、５１は円
柱状のジャーナル部５２とインプロセス測定が困難なカ
ム部５３とを軸方向に離間させて形成したカム軸からな
る被加工物であり、被加工物５１は両端部が主軸側セン
タ３３と心押台センタ３４とに係合支持されて、図５に
は図示省略したテーブル上方に着脱可能に装着される。A grinding method according to the second embodiment of the present invention will be described with reference to FIG. In FIG. 5, reference numeral 51 denotes a workpiece including a cam shaft formed by axially separating a cylindrical journal portion 52 and a cam portion 53, which is difficult to perform in-process measurement, and the workpiece 51 has both ends. The main shaft side center 33 and the tailstock center 34 are engaged and supported, and are detachably mounted above a table (not shown in FIG. 5).
【００３４】ジャーナル部５２の外径荒研削用の第１砥
石台１３と、外径仕上げとカム部５３の研削用とを兼ね
た第２砥石台１４とを、左，右に並べて設けて、複合研
削盤をデュアルヘッド構成にしてあり、第１砥石台１３
に装着した第１砥石３１と、第２砥石台１４に装着した
第２砥石３２とをほぼ等しい外径にしてある。なお、第
２実施例に用いる複合研削盤の前述した以外の構成は、
第１実施例に用いる複合研削盤とほぼ同構成にしてあ
る。A first grindstone base 13 for rough outer diameter grinding of the journal portion 52 and a second grindstone base 14 for both outer diameter finishing and grinding of the cam portion 53 are provided side by side on the left and right sides. The compound grinder has a dual head configuration, and the first grindstone 13
The first grindstone 31 mounted on the second grindstone and the second grindstone 32 mounted on the second grindstone base 14 have substantially the same outer diameter. The structure of the compound grinding machine used in the second embodiment other than that described above is as follows.
The structure is almost the same as that of the compound grinder used in the first embodiment.
【００３５】第２実施例による研削方法は、第１砥石台
１３に装着した第１砥石３１によって被加工物５１のジ
ャーナル部５２の外径部を荒研削し、次に、荒研削を終
了した前記外径部を第２砥石台１４に装着した第２砥石
３２によって仕上げ研削し、その後、第２砥石３２によ
って被加工物５１のインプロセス測定による制御では加
工が困難なカム部５３の外周面を研削する。In the grinding method according to the second embodiment, the outer diameter portion of the journal portion 52 of the workpiece 51 is roughly ground by the first grindstone 31 mounted on the first grindstone base 13, and then the rough grinding is completed. The outer diameter portion is finish-ground by the second grindstone 32 mounted on the second grindstone base 14, and then the outer peripheral surface of the cam portion 53 which is difficult to process by the in-process measurement of the workpiece 51 by the second grindstone 32. To grind.
【００３６】第２実施例の前記各研削は、第１実施例で
は、第２砥石３２によって被加工物の溝の両側部分を面
取り研削したのを、カム部５３の外周面の研削にした以
外、第１実施例とほぼ同様である。また、第２実施例で
は、被加工物５１に形成された複数のジャーナル部５２
の全部に、荒研削を行った後仕上げ研削を行い、さらに
その後、複数のカム部５３の全部を研削しても、荒研削
と仕上げ研削とをジャーナル部５２に行うことを繰り返
して全部のジャーナル部５２の研削を行い、任意のジャ
ーナル部５２の仕上げ研削に続けて、適宜カム部５３の
研削をしてもよい。In each of the grindings of the second embodiment, in the first embodiment, both sides of the groove of the workpiece are chamfered by the second grindstone 32, except that the outer peripheral surface of the cam portion 53 is ground. The same as in the first embodiment. Further, in the second embodiment, a plurality of journal portions 52 formed on the workpiece 51.
Even if all of the plurality of cam portions 53 are ground after that, rough grinding and finish grinding are repeatedly performed on the journal portion 52 to finish all the journals. The portion 52 may be ground, and the cam portion 53 may be ground appropriately after the finish grinding of the arbitrary journal portion 52.
【００３７】この発明の第３実施例による研削方法につ
き、図６を参照して説明する。 図６において、６１は
一端部に大外径部６２を形成し、大外径部６２と、これ
と同軸に小外径の筒状部６３を一体に形成した被加工物
であり、被加工物６１は、主軸２０の先端部に固定した
チャック６４に大外径部６２が着脱可能に保持される。A grinding method according to the third embodiment of the present invention will be described with reference to FIG. In FIG. 6, reference numeral 61 denotes a work piece in which a large outer diameter portion 62 is formed at one end, and a large outer diameter portion 62 and a cylindrical portion 63 having a small outer diameter are coaxially formed integrally with the large outer diameter portion 62. A large outer diameter portion 62 of the object 61 is detachably held by a chuck 64 fixed to the tip portion of the main shaft 20.
【００３８】筒状部６３の外径荒研削用の第１砥石３１
と、前記筒状部６３の外径仕上げ研削インプロセス測定
による制御では加工が困難な筒状部の内径研削用の第１
砥石３２とを、図６には図示しない第１砥石台と第２砥
石台に設けてある。なお、第３実施例に用いる複合研削
盤の前述した以外の構成は、第１実施例に用いる複合研
削盤とほぼ同構成にしてある。First grindstone 31 for rough outer diameter grinding of the cylindrical portion 63
And a first portion for grinding the inner diameter of the cylindrical portion, which is difficult to process by the control by the outer diameter finish grinding in-process measurement of the cylindrical portion 63.
The grindstones 32 are provided on the first grindstone base and the second grindstone base, which are not shown in FIG. The structure of the compound grinder used in the third embodiment is the same as that of the compound grinder used in the first embodiment, except for the above-mentioned structure.
【００３９】第３実施例による研削方法は、第１砥石３
１によって被加工物６１の筒状部６３の外径部を荒研削
し、次に荒研削を終了した前記外径部を第２砥石３２に
よって仕上げ研削し、その後、第２砥石３２を筒状部６
３内に右側から挿入し、第２砥石３２によって、筒状部
６３のインプロセス測定が困難な内径部を研削する。In the grinding method according to the third embodiment, the first grindstone 3 is used.
1 rough-grinds the outer diameter portion of the tubular portion 63 of the workpiece 61, then finish-grinds the outer diameter portion after the rough grinding with the second grindstone 32, and thereafter, the second grindstone 32 is cylindrical. Part 6
3 is inserted from the right side, and the second grindstone 32 grinds the inner diameter portion of the tubular portion 63 where in-process measurement is difficult.
【００４０】そして、第２，第３実施例による荒研削、
仕上げ研削は、それぞれ定寸装置で検知した計測値と砥
石台を駆動する駆動モータの回転を検出するエンコーダ
で検知した座標値と比較して差を算出し、この差を座標
値に加えて第１，第２砥石台の熱変位に対する補正を各
別に行う。なお、図５，図６において、図１，図２と同
符号は対応する部分を示す。Then, rough grinding according to the second and third embodiments,
In finish grinding, the difference is calculated by comparing the measured value detected by the sizing device with the coordinate value detected by the encoder that detects the rotation of the drive motor that drives the grinding wheel head, and add this difference to the coordinate value to calculate the difference. 1. The thermal displacement of the second wheel head is corrected separately. In FIGS. 5 and 6, the same reference numerals as those in FIGS. 1 and 2 indicate corresponding parts.
【００４１】この発明は、前記各実施例に設けた荒研削
用の第１砥石台およびこの第１砥石台に設けた各部材を
共に省略し、第２砥石台およびこれに設けた第２砥石の
みによって研削をするようにしてもよい。In the present invention, the first grindstone base for rough grinding and the respective members mounted on the first grindstone base provided in each of the above-described embodiments are omitted, and the second grindstone base and the second grindstone provided thereon are omitted. You may make it grind only by.
【００４２】[0042]
【発明の効果】以上説明したように、この発明の研削方
法は、砥石台に設けた砥石によって被加工物の外径部を
研削し、続いて、前記砥石によって前記被加工物のイン
プロセス測定が不可能または困難な部分を研削する研削
方法にして、前記外径部が所定の仕上げ径に研削された
ことを定寸装置によって検出されたときの前記砥石台の
位置を基準にして、インプロセス測定が不可能または困
難な部分の研削の切込みを行うようにしたので、次の効
果が得られる。As described above, according to the grinding method of the present invention, the outer diameter portion of the workpiece is ground by the grindstone provided on the grindstone base, and subsequently the in-process measurement of the workpiece is carried out by the grindstone. In the grinding method for grinding the impossible or difficult part, the position of the wheel head when the sizing device detects that the outer diameter part has been ground to a predetermined finishing diameter is used as a reference. The following effects can be obtained by making a grinding cut in a portion where process measurement is impossible or difficult.
【００４３】すなわち、この発明の研削方法は、被加工
物の外径部と、インプロセス測定が不可能または困難な
部分との研削を、１台の研削盤のテーブルに被加工物を
装着したまま行うので、従来のように、２台の研削盤の
テーブルに被加工物を着脱してそれぞれの研削するのと
異なり、被加工物の着脱時に発生する被加工物のアライ
メント不良がなくなり、同軸度が向上する。このため、
インプロセス測定が不可能または困難な部分の研削加工
時に被加工物の外径振れを原因とする精度不良がなくな
り、高精度の加工ができる。That is, according to the grinding method of the present invention, the outer diameter portion of the workpiece and the portion where in-process measurement is impossible or difficult are ground by mounting the workpiece on the table of one grinder. Since it is performed as it is, unlike the conventional method, in which the work pieces are attached to and detached from the tables of two grinders and the respective pieces are ground, misalignment of the work piece that occurs when the work pieces are attached and removed is eliminated, and the coaxial The degree improves. For this reason,
High accuracy machining can be performed without the inferior precision caused by the outer diameter runout of the workpiece during grinding of the part where in-process measurement is impossible or difficult.
【００４４】また、被加工物の外径部に対する研削時に
用いる定寸装置は、ノイズの影響が少ないものを使用で
き、このため外径部の研削後の仕上げ径を正確に測定し
て、この時の砥石台の位置から熱変位の補正が正確にで
きるようになり、被加工物のインプロセス測定が不可能
または困難な部分はこの補正を行った砥石で研削加工を
行うので、加工精度を向上することができる。Further, the sizing device used for grinding the outer diameter portion of the workpiece can be one that is less affected by noise. Therefore, the finished diameter of the outer diameter portion after grinding is accurately measured and It is now possible to accurately correct the thermal displacement from the position of the grinding wheel head at that time, and for the part where in-process measurement of the workpiece is impossible or difficult, grinding is performed with this corrected grinding wheel, so the processing accuracy is improved. Can be improved.
【００４５】さらに、従来は２台用いていた研削盤が、
この発明では１台の研削盤ですむので、設備コストを低
減できる。Further, the grinder which has conventionally used two units,
In this invention, since only one grinding machine is required, equipment cost can be reduced.
【図１】この発明の第１実施例による研削方法を行う複
合研削盤を示した概略平面図FIG. 1 is a schematic plan view showing a compound grinder that performs a grinding method according to a first embodiment of the present invention.
【図２】この発明の第１実施例による被加工物と砥石と
の関係を工程順に示した説明図FIG. 2 is an explanatory view showing the relationship between the workpiece and the grindstone according to the first embodiment of the present invention in the order of steps.
【図３】第１実施例による研削方法のフローチャートFIG. 3 is a flowchart of a grinding method according to the first embodiment.
【図４】第１実施例による被加工物の溝の両側部分を面
取り研削する状態を示した部分横断面図FIG. 4 is a partial cross-sectional view showing a state in which both sides of a groove of a workpiece according to the first embodiment are chamfered and ground.
【図５】この発明の第２実施例による被加工物と砥石と
の位置関係を示した説明図FIG. 5 is an explanatory view showing a positional relationship between a workpiece and a grindstone according to a second embodiment of the present invention.
【図６】この発明の第３実施例による被加工物と砥石と
の位置関係を示した説明図FIG. 6 is an explanatory view showing a positional relationship between a workpiece and a grindstone according to a third embodiment of the present invention.
【図７】従来例の研削方法を工程順に示した説明図FIG. 7 is an explanatory view showing a conventional grinding method in order of steps.
【図８】従来例の研削方法による被加工物の溝の両側部
分を面取り研削する状態を示した部分横断面図FIG. 8 is a partial cross-sectional view showing a state in which both sides of a groove of a workpiece are chamfered and ground by a conventional grinding method.
１ 被加工物 ２ 溝 １１ ベッド １２ テーブル １４ 第２砥石台 １５ テーブル移動用サーボモータ １９ 主軸回転用モータ ２０ 主軸 ２２ エンコーダ ２４ 第２砥石台移動用サーボモータ ２４ａ エンコーダ ２８ 第２砥石駆動装置 ３０ 第２砥石軸 ３２ 第２砥石 ３３ 主軸側センタ ３４ 心押台側センタ ４０ 数値制御装置 ４１ 中央処理装置 ４２ メモリ ４９ 定寸装置 1 Workpiece 2 Groove 11 Bed 12 Table 14 Second Grinding Wheel Stand 15 Table Moving Servo Motor 19 Spindle Rotating Motor 20 Spindle 22 Encoder 24 Second Grinding Wheel Moving Servo Motor 24a Encoder 28 Second Grinding Wheel Driving Device 30 Second Grindstone axis 32 Second grindstone 33 Main spindle side center 34 Tailstock side center 40 Numerical control device 41 Central processing unit 42 Memory 49 Sizing device
Claims (1)
外径部を研削し、続いて、前記砥石によって前記被加工
物のインプロセス測定が不可能または困難な部分を研削
する研削方法にして、前記外径部が所定の仕上げ径に研
削されたことを定寸装置によって検出されたときの前記
砥石台の位置を基準にして、インプロセス測定が不可能
または困難な部分の研削の切込みを行うことを特徴とす
る研削方法。1. A grinding method in which an outer diameter portion of a workpiece is ground by a grindstone provided on a grindstone base, and subsequently, a portion of the workpiece where in-process measurement is impossible or difficult is ground by the grindstone. And, based on the position of the grinding wheel head when the sizing device detects that the outer diameter portion has been ground to a predetermined finish diameter, the incision for grinding the portion where in-process measurement is impossible or difficult A grinding method characterized by performing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25622592A JP3241453B2 (en) | 1992-09-25 | 1992-09-25 | Grinding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25622592A JP3241453B2 (en) | 1992-09-25 | 1992-09-25 | Grinding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06246613A true JPH06246613A (en) | 1994-09-06 |
| JP3241453B2 JP3241453B2 (en) | 2001-12-25 |
Family
ID=17289677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25622592A Expired - Lifetime JP3241453B2 (en) | 1992-09-25 | 1992-09-25 | Grinding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3241453B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2614574A1 (en) * | 1987-04-30 | 1988-11-04 | Sony Corp | DOUBLE INJECTION MOLDING DEVICE, IN PARTICULAR OF AN OPAQUE RESIN AND A TRANSPARENT RESIN |
| CN107571107A (en) * | 2017-10-17 | 2018-01-12 | 南京纽美瑞数控科技有限公司 | A kind of internal grinding replacing emery wheel exempts from the method for grinding to knife |
| CN113352172A (en) * | 2021-07-05 | 2021-09-07 | 成都立海同创智能科技有限公司 | Automatic polishing device and polishing method for wheel steel ring welding seam |
-
1992
- 1992-09-25 JP JP25622592A patent/JP3241453B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2614574A1 (en) * | 1987-04-30 | 1988-11-04 | Sony Corp | DOUBLE INJECTION MOLDING DEVICE, IN PARTICULAR OF AN OPAQUE RESIN AND A TRANSPARENT RESIN |
| CN107571107A (en) * | 2017-10-17 | 2018-01-12 | 南京纽美瑞数控科技有限公司 | A kind of internal grinding replacing emery wheel exempts from the method for grinding to knife |
| CN113352172A (en) * | 2021-07-05 | 2021-09-07 | 成都立海同创智能科技有限公司 | Automatic polishing device and polishing method for wheel steel ring welding seam |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3241453B2 (en) | 2001-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3787248B2 (en) | Method and apparatus for controlling sizing of machine tool | |
| JP4047277B2 (en) | Method and apparatus for grinding the central bearing position of a crankshaft | |
| US8678881B2 (en) | Grinding center and method for simultaneous grinding of a plurality of bearings and end-side surfaces of crankshafts | |
| JP3241453B2 (en) | Grinding method | |
| JP5402546B2 (en) | Cylindrical workpiece grinding method | |
| JPH06114702A (en) | Automatic taper correcting device | |
| JP3687770B2 (en) | Method and apparatus for controlling sizing of twin head grinder | |
| JP2786879B2 (en) | Internal grinding device | |
| JP3834493B2 (en) | Compound grinding method and apparatus | |
| JPH1190799A (en) | Machine tool for crank pin machining and machining method for crank pin | |
| JP4088071B2 (en) | Work end face position detecting means and work end face position detecting method in machine tool for combined machining | |
| JP2003025196A (en) | Method and device for grinding crank shaft | |
| JPH11320299A (en) | Outer diameter polish finishing device of commutator processing machine | |
| JPH05200649A (en) | Tool centering device | |
| JP2600425B2 (en) | Method and apparatus for lapping nut thread groove | |
| JP3836098B2 (en) | Crank pin grinding method and grinding apparatus | |
| JP2000271827A (en) | Compound machine method and compound machining device | |
| JP4539557B2 (en) | Method and apparatus for controlling sizing of machine tool | |
| JP2004330397A (en) | Gear wheel honing method and working machine | |
| JP2542084B2 (en) | Method for correcting the grinding surface of the grinding wheel | |
| JP2003094293A (en) | Abnormality detection method for measurement device of machining device and machining device | |
| JP3170938B2 (en) | Grinding method | |
| JPS61241055A (en) | Precision grinding device | |
| JP3920995B2 (en) | Crankshaft processing equipment | |
| JP3322682B2 (en) | Groove grinding machine for axial work |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R371 | Transfer withdrawn |
Free format text: JAPANESE INTERMEDIATE CODE: R371 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313115 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081019 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 8 Free format text: PAYMENT UNTIL: 20091019 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 8 Free format text: PAYMENT UNTIL: 20091019 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101019 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 10 Free format text: PAYMENT UNTIL: 20111019 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 10 Free format text: PAYMENT UNTIL: 20111019 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 11 Free format text: PAYMENT UNTIL: 20121019 |
|
| EXPY | Cancellation because of completion of term |