JPS61292011A - Measuring method for out-of-roundness of precise mass-rpoduced parts - Google Patents
Measuring method for out-of-roundness of precise mass-rpoduced partsInfo
- Publication number
- JPS61292011A JPS61292011A JP10591885A JP10591885A JPS61292011A JP S61292011 A JPS61292011 A JP S61292011A JP 10591885 A JP10591885 A JP 10591885A JP 10591885 A JP10591885 A JP 10591885A JP S61292011 A JPS61292011 A JP S61292011A
- Authority
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- Japan
- Prior art keywords
- roundness
- time
- difference
- workpiece
- measuring
- 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
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の概要〕
円筒研削加工に際し、定寸制御装置により検出される測
定電位と基準電位との電位差が零になったときから研削
が終了するまでの時間を測定することにより、各加工品
の真円度を測定する。[Detailed Description of the Invention] [Summary of the Invention] During cylindrical grinding, the time from when the potential difference between the measurement potential detected by the sizing control device and the reference potential becomes zero until the grinding is completed is measured. This measures the roundness of each workpiece.
〔産業上の利用分野〕 ′
本発明は精密量産部品の真円度測定方法に関し、更に詳
しくは、円筒研削される加工品の加工中における直径を
測定してその測定値と基準値とを比較し、加工品が真円
の場合には測定値と基準値との差が零のときに研削終了
信号を出力し、且つ、加工品が真円でない場合には測定
値と基準値との差が零になった時点から加工品の真円度
にほぼ比例する時間だけ遅れて研削終了信号を出力する
定寸制御装置を用いて加工品の真円度を測定する方法に
関する。[Field of Industrial Application] ′ The present invention relates to a method for measuring the roundness of precision mass-produced parts, and more specifically, a method for measuring the diameter of a workpiece to be cylindrically ground during processing and comparing the measured value with a reference value. However, if the workpiece is a perfect circle, a grinding end signal is output when the difference between the measured value and the reference value is zero, and if the workpiece is not a perfect circle, the difference between the measurement value and the reference value is output. The present invention relates to a method for measuring the roundness of a workpiece using a sizing control device that outputs a grinding completion signal after a time delay approximately proportional to the roundness of the workpiece from the time when the roundness of the workpiece becomes zero.
一般に、光フアイバコネクタの接続には高精度の心合わ
せが要求されるため、光フアイバコネクタのフェルール
の外径部には超高精度、例えば加工精度が０．５μｍ、
真円度が０．５μｍが要求される。Generally, the connection of optical fiber connectors requires high-precision alignment, so the outer diameter of the ferrule of the optical fiber connector is manufactured with ultra-high precision, for example, with a processing accuracy of 0.5 μm.
A roundness of 0.5 μm is required.
このような部品の超精密円筒研削加工には、通常、寸法
設定のための定寸制御装置が用いられる。For ultra-precision cylindrical grinding of such parts, a sizing control device is usually used to set the dimensions.
例えばマーポス株式会社より市販されている定寸制御装
置は円筒研削される加工品の加工中における外径を測定
してその測定値を電位により出力する測定部と、予め精
密加工されたマスターの外径或いは内径を測定してその
測定値を基準値として電位により出力する基準値設定部
と、制御部とを備えている。制御部は測定部から入力さ
れる測定電位と基準値設定部から入力される基準電位と
を比較し、その電位差が零のときに研削終了信号を出力
するように構成されている。For example, the sizing control device commercially available from Marposs Co., Ltd. has a measuring section that measures the outer diameter of a workpiece to be cylindrically ground during processing and outputs the measured value using an electric potential, and a measuring section that measures the outer diameter of a workpiece that is being cylindrically ground during processing and outputs the measured value using an electric potential. It includes a reference value setting section that measures the diameter or inner diameter and outputs the measured value as a reference value as a potential, and a control section. The control section is configured to compare the measured potential input from the measurement section and the reference potential input from the reference value setting section, and output a grinding end signal when the potential difference is zero.
この種の定寸制御装置を用いて量産部品の円筒研削加工
を行なった場合、加工精度及び真円度が許容公差を越え
るものが発生し得ることが知られている。そこで、従来
は、量産品の加工後の真円度を抜取り検査により別個の
真円度測定機で測丸（１、ていたが、抜取り検査により
不良品が発見された場合には全数について検査選別を行
なうか或いは全数を不良とする必要があり、精密部品は
高価であるため、経済的及び時間的損失が極めて大とな
っていた。It is known that when cylindrical grinding of mass-produced parts is performed using this type of sizing control device, the machining accuracy and roundness may exceed allowable tolerances. Therefore, in the past, the roundness of mass-produced products after processing was measured using a separate roundness measuring machine through sampling inspection. It is necessary to sort out or reject all the parts, and since precision parts are expensive, the economic and time losses are extremely large.
本発明者等は、市販の定寸制御装置を円筒研削加工に用
いた場合に、該定寸制御装置が次のような特性を示すこ
とを見出した。すなわち、定寸制御装置は、通常は、測
定値と基準値との差を示す電位差計の指針が零点に達し
たときに、加工日Ｍの終了信号を発する。そして、回転
砥石が加工品から離間したときに指針はマイナス側に大
きく振れる。しかし、ある加工品の場合には、電位差計
の指針が零点を通過して継続的にマイナス側に進んだ後
に加工終了信号を発し、そして、回転砥石が加工品から
離間したときに指針はマイナス側に大きく振れる。本発
明者等は電位差計の指針が零点に達した時点から加工が
終了するまでの時間遅れと、加工後の真円度との関係を
調べたところ、その時間遅れと加工品の真円度とがほぼ
比例関係にあることが判った。The present inventors have discovered that when a commercially available sizing control device is used for cylindrical grinding, the sizing control device exhibits the following characteristics. That is, the sizing control device normally issues an end signal for the processing date M when the pointer of the potentiometer that indicates the difference between the measured value and the reference value reaches the zero point. Then, when the rotating grindstone separates from the workpiece, the pointer swings significantly in the negative direction. However, in the case of a certain workpiece, the pointer of the potentiometer passes through the zero point and continues to move toward the negative side before issuing a processing end signal, and when the rotary grindstone moves away from the workpiece, the pointer becomes negative. It swings a lot to the side. The present inventors investigated the relationship between the time delay from when the pointer of the potentiometer reaches the zero point until the end of machining and the roundness after machining, and found that the time delay and the roundness of the processed product It was found that there is an almost proportional relationship between the two.
したがって、本発明が解決すべき問題点は、定寸制御装
置のこのような特性を利用して円筒研削加工品の真円度
を個別に効率良く測定することにある。Therefore, the problem to be solved by the present invention is to utilize such characteristics of the sizing control device to efficiently measure the roundness of cylindrical grinded products individually.
上記問題点を解決するための手段として、本発明は、円
筒研削される加工品の加工中における直径を測定してそ
の測定値と基準値とを比較し、加工品が真円の場合には
測定値と基準値との差が零のときに研削終了信号を出力
し、且つ、加工品が真円でない場合には測定値と基準値
との差が零になった時点から加工品の真円度にほぼ比例
する時間だけ遅れて研削終了信号を出力する定寸制御装
置を用いて加工品の真円度を測定する方法であって、測
定値と基準値との差が零になった時点から研削が終了す
るまでの時間を測定することにより加工品の真円度を測
定することを特徴とする精密量産部品の真円度測定方法
を提供する。As a means for solving the above problems, the present invention measures the diameter of a workpiece to be cylindrically ground during processing and compares the measured value with a reference value, and when the workpiece is a perfect circle, A grinding end signal is output when the difference between the measured value and the reference value is zero, and if the workpiece is not a perfect circle, the grinding end signal is output from the time when the difference between the measured value and the reference value becomes zero. A method of measuring the roundness of a processed product using a sizing control device that outputs a grinding completion signal with a delay of a time approximately proportional to the roundness, and the difference between the measured value and the reference value becomes zero. Provided is a method for measuring the roundness of precision mass-produced parts, which is characterized by measuring the roundness of a processed product by measuring the time from a point in time until the end of grinding.
上記手段によれば、加工品ごとにその真円度が簡単に測
定されるので、不良品を的確に且つ容易に選別すること
ができるようになる。According to the above means, since the roundness of each processed product can be easily measured, defective products can be accurately and easily selected.
〔実施例〕 以下、図面を参照して本発明の詳細な説明する。〔Example〕 Hereinafter, the present invention will be described in detail with reference to the drawings.
図を参照すると、定寸制御装置１０は加工品１１の外径
を測定しそめ測定値に応じた電位を出力する測定部１２
と、予め精密加工されたマスター１３の内径若しくは外
径或いは所望の厚みを有するゲージの厚さ等を測定しそ
の測定値に応じた電位を出力す基準値設定部１４と、制
御部１５とを備えている。Referring to the figure, the sizing control device 10 measures the outer diameter of the workpiece 11 and outputs a potential according to the measured value using a measuring section 12.
, a reference value setting section 14 that measures the inner diameter or outer diameter of the master 13 that has been precisely machined in advance, or the thickness of a gauge having a desired thickness, and outputs a potential according to the measured value; and a control section 15. We are prepared.
制御部１５は測定部１２から入力される測定電位と基準
値設定部１４から入力される基準電位とを比較し、加工
品１１が真円の場合には測定値と基準値との電位差が零
のときに出力端子１５から研削終了信号を出力し、且つ
、加工品１４が真円でない場合には測定値と基準値との
電位差が零になった時点から加工品１１の真円度にほぼ
比例する時間だけ遅れて出力端子１５から研削終了信号
を出力するように構成されている。定寸制御装置１４は
測定値と基準値との電位差を表示する電位差計１６を備
えている。このような特性を有する定寸制御装置１０は
例えばマーボス株式会社から市販されている。The control unit 15 compares the measured potential input from the measuring unit 12 and the reference potential input from the reference value setting unit 14, and when the processed product 11 is a perfect circle, the potential difference between the measured value and the reference value is zero. A grinding end signal is output from the output terminal 15 when It is configured to output a grinding end signal from the output terminal 15 with a delay of a proportional time. The sizing control device 14 includes a potentiometer 16 that displays the potential difference between the measured value and the reference value. A sizing control device 10 having such characteristics is commercially available from Marbos Co., Ltd., for example.
円筒研削盤の回転砥石１７による加工が進むと、測定値
と基準値との電位差が零に近づく。定寸制御装置１０か
ら円筒研削盤に研削終了信号が送られると、円筒研削盤
の回転砥石１７は加工品１１から離間する。回転砥石１
７が加工品１１から離間する瞬間に測定値と基準値との
電位差はマイナス側に大きく変化する。As processing by the rotary grindstone 17 of the cylindrical grinder progresses, the potential difference between the measured value and the reference value approaches zero. When a grinding end signal is sent from the sizing control device 10 to the cylindrical grinder, the rotary grindstone 17 of the cylindrical grinder moves away from the workpiece 11. Rotating whetstone 1
At the moment when 7 separates from the workpiece 11, the potential difference between the measured value and the reference value changes significantly to the negative side.
本発明方法によれば、上記測定値と基準値との電位差が
零になった時点から研削が終了するまでの時間を測定す
ることにより加工品の真円度が測定される。According to the method of the present invention, the roundness of the processed product is measured by measuring the time from when the potential difference between the measured value and the reference value becomes zero until the grinding is completed.
本発明による真円度測定方法を・具体的に説明すると、
ここでは、定寸制御装置１０により検出される電位差が
第１比較回路２０及び第２比較回路２１に入力される。To specifically explain the roundness measuring method according to the present invention,
Here, the potential difference detected by the sizing control device 10 is input to the first comparison circuit 20 and the second comparison circuit 21.
第１比較回路２０は定寸制御装置１０からの入力電位（
電位差）Ｖｃを０■と比較し、入力電位ＶｃがＯｖ以下
になったときにカウンタ回路２２のクリア端子ＣＬＲに
入力される出力をハイレベル又はローレベルに切り替え
る。The first comparison circuit 20 receives an input potential (
The potential difference) Vc is compared with 0■, and when the input potential Vc becomes less than Ov, the output input to the clear terminal CLR of the counter circuit 22 is switched to high level or low level.
一方、第２比較回路２１は定寸制御装置１０からの入力
電位（電位差）Ｖｃを予め設定された基準電位Ｖｍ（例
えば−１２Ｖ）と比較し、入力電位Ｖｃが基準電位Ｖｍ
以下になったときにランチ回路２３のクロック端子Ｃに
トリガー信号を送る。On the other hand, the second comparison circuit 21 compares the input potential (potential difference) Vc from the sizing control device 10 with a preset reference potential Vm (for example, -12V), and determines that the input potential Vc is the reference potential Vm.
When the following occurs, a trigger signal is sent to the clock terminal C of the launch circuit 23.
すなわち、第２比較回路２１は回転砥石１７が加工品１
１から離間するときに生じる電位差の急激な変化を検出
する役割りを果たす。That is, the second comparison circuit 21 detects that the rotary grindstone 17 is the workpiece 1.
It serves to detect the sudden change in potential difference that occurs when the voltage is separated from the voltage 1.
カウンタ回路２２のクロック端子ＣＫにはクロック回路
２４が接続されている。クロック回路２４は水晶発振器
を含む基準クロック発生回路と必要数の分周回路とを備
えている。A clock circuit 24 is connected to a clock terminal CK of the counter circuit 22. The clock circuit 24 includes a reference clock generation circuit including a crystal oscillator and a necessary number of frequency dividing circuits.
カウンタ回路２２は端子ＣＬＲへの入力信号が切り替わ
ったとき、すなわち、第１比較回路２０への入力信号Ｖ
ｃがＯｖ以下のレベルになったときにクロック回路２３
から入力されるパルス数のカウント数を零にし、その後
のカウント数に相当する信号（ここでは４ビツトのディ
ジタル信号）を第３比較回路２５に送る。第３比較回路
２５はカウンタ回路２４からの入力信号と一定値発生回
路２６からの入力信号（４ビツトのディジタル信号）と
を常時比較し、再入力信号の大小に応じてランチ回路２
３のデータ入力端子りにハイレベル又はローレベルの信
号を送る。The counter circuit 22 is activated when the input signal to the terminal CLR is switched, that is, when the input signal V to the first comparison circuit 20 is switched.
When c becomes a level below Ov, the clock circuit 23
The count number of the number of pulses inputted from is set to zero, and a signal (here, a 4-bit digital signal) corresponding to the subsequent count number is sent to the third comparison circuit 25. The third comparison circuit 25 constantly compares the input signal from the counter circuit 24 and the input signal (4-bit digital signal) from the constant value generation circuit 26, and outputs the input signal from the launch circuit 2 depending on the magnitude of the re-input signal.
Send a high level or low level signal to the data input terminal 3.
ラッチ回路２３の出力端子百はドライバ回路２７を介し
てリレニ２８に接続されている。う・ノチ回路２３がト
リガー信号を入力した時点でカウンタ回路２２から第３
比較回路２５に送ら□れる４ビット信号が一定値発生回
路２６から入力れさる４ビット信号よりも小さいときに
は、リレー２８は消勢状態にある。一方、ラッチ回路２
３がトリガー信号を入力した時点でカウンタ回路２２か
ら第３比較回路２５に送られる４ビ・ノド信号が一定値
発生回路２６から入力れさる４ビット信号よりも大きい
ときには、ランチ回路２３の端子百から出力さ゛れるレ
ベルの切替えにより、リレー２８が励磁される。The output terminal of the latch circuit 23 is connected to the relay 28 via the driver circuit 27. When the trigger signal is input to the nochi circuit 23, the third
When the 4-bit signal sent to the comparison circuit 25 is smaller than the 4-bit signal inputted from the constant value generation circuit 26, the relay 28 is in a de-energized state. On the other hand, latch circuit 2
When the 4-bit signal sent from the counter circuit 22 to the third comparison circuit 25 is larger than the 4-bit signal input from the constant value generation circuit 26 at the time when the trigger signal is inputted to the terminal 3, the terminal 100 of the launch circuit 23 is The relay 28 is energized by switching the output level.
リレー２８の励磁によりその接点２８ａが閉成すると、
電磁弁２９が作動し、これにより、加工後の加工品１１
を不良品として選別するためのエアシリンダ３０が作動
して不良品を選別する。When the relay 28 is energized and its contact 28a is closed,
The solenoid valve 29 is activated, and the workpiece 11 after processing is thereby
The air cylinder 30 is activated to select defective products.
エアシリンダ３０が選別動作を終了すると、リミットス
イッチ３１が作動してランチ回路２３のリセット端子Ｒ
３Ｔにリセット信号が送られる。When the air cylinder 30 finishes the sorting operation, the limit switch 31 is activated and the reset terminal R of the launch circuit 23 is activated.
A reset signal is sent to 3T.
加工品１１が真円の場合には、定寸制御装置１０で検出
される電位差Ｖｃが零になったときに研削終了信号が速
やかに発っせられるので、研削の終了に伴う電位差Ｖｃ
のマイナス側への大きな変動は速やかに発生する。した
がって、ラッチ回路２３にトリガー信号が入力されたと
きのカウンタ回路２２の出力信号は一定値発生回路２６
から出力される信号よりも小さい。したがって、リレー
２８は消磁状態にある。一方、加工品１１の加工精度が
悪い場合或いは真円でない場合には、定寸制御装置１０
で検出される電位差Ｖｃが零になった後も電位差Ｖｃは
継続的にマイナス側に変化し、真円度誤差に相当する量
だけマイナス側に変化したときに研削終了信号が発っせ
られる。したがって、研削の終了に伴う電位差のマイナ
ス側への大きな変動は電位差Ｖｃが零になった後述れて
現れる。その遅れ時間はカウンタ回路２２により計測さ
れ、その遅れ時間に相当する出力信号が一定値発生信号
２６からの出力信号よりも大きい場合にリレー２８が励
磁される。加工品１１の量産加工において、加工後の加
工品は順番に次の工程に向けて搬出されるので、エアシ
リンダ３０により不良品を的確に選別することができる
。一定値発生器２６の出力信号の値は加工品の許容公差
に応じて任意に設定することができる。When the workpiece 11 is a perfect circle, the grinding end signal is immediately issued when the potential difference Vc detected by the sizing control device 10 becomes zero, so the potential difference Vc accompanying the end of grinding is
A large change to the negative side occurs quickly. Therefore, when the trigger signal is input to the latch circuit 23, the output signal of the counter circuit 22 is output from the constant value generating circuit 26.
is smaller than the signal output from the Therefore, relay 28 is in a demagnetized state. On the other hand, if the processing accuracy of the processed product 11 is poor or if it is not a perfect circle, the sizing control device 10
Even after the potential difference Vc detected at becomes zero, the potential difference Vc continues to change to the negative side, and when it changes to the negative side by an amount corresponding to the roundness error, a grinding end signal is issued. Therefore, a large change in the potential difference to the negative side due to the end of grinding appears after the potential difference Vc becomes zero. The delay time is measured by the counter circuit 22, and when the output signal corresponding to the delay time is greater than the output signal from the constant value generation signal 26, the relay 28 is energized. In mass production of the processed products 11, the processed products are sequentially transported to the next process, so that defective products can be accurately selected by the air cylinder 30. The value of the output signal of the constant value generator 26 can be set arbitrarily depending on the permissible tolerances of the workpiece.
以上図示実施例につき説明したが、本発明は上記実施例
の態様のみに限定されるものではなく、特許請求の範囲
に記載した発明の範囲内においてその構成要素に種々の
変更を加えることができる。Although the illustrated embodiments have been described above, the present invention is not limited to only the embodiments of the above embodiments, and various changes can be made to the constituent elements within the scope of the invention described in the claims. .
例えば、定寸制御装置により検出される電位差Ｖｃが零
になったときから加工品の研削が終了するまでの時間は
、研削終了時における電位差Ｖｃのレベルを測定するこ
とにより、間接的に測定することができる。また、加工
品ごとに測定した時間をＸＹレコーダ等に表示し、作業
者がその表示データに基づいて不良品の選別を行なうよ
うにしてもよい。For example, the time from when the potential difference Vc detected by the sizing control device becomes zero until the grinding of the workpiece is finished can be indirectly measured by measuring the level of the potential difference Vc at the end of grinding. be able to. Alternatively, the time measured for each processed product may be displayed on an XY recorder or the like, and the operator may select defective products based on the displayed data.
以上の説明から明らかなように、本発明による真円度測
定方法によれば、加工品ごとにその真円度を簡単に測定
することができるので、不良品を経済的に且つ効率的に
選別することができるようになる。As is clear from the above explanation, according to the roundness measuring method according to the present invention, the roundness of each processed product can be easily measured, so that defective products can be economically and efficiently sorted out. You will be able to do this.
図は本発明の一実施例を示す定寸制御装置及び真円度測
定回路のブロック図である。
１０・・・定寸制御装置、１１・・・加工品、１２・・
・測定部、 １３・・・マスター、１４・・・基
準値設定部、１５・・・制御部、１６・・・電位差計、
１７・・・回転砥石、２０・・・第１比較回路、２
１・・・第２比較回路、２２・・・カウンタ回路、２３
・・・ランチ回路、２４・・・クロック回路、２５・・
・第３比較回路、２６・・・一定値発生回路、
２７・・・ドライバ゛回路、２８・・・リレー、２９・
・・電磁弁、 ３０・・・エアシリンダ、３１・
・・リミットスイッチ。The figure is a block diagram of a sizing control device and a roundness measuring circuit showing an embodiment of the present invention. 10... Sizing control device, 11... Processed product, 12...
- Measuring section, 13... Master, 14... Reference value setting section, 15... Control section, 16... Potentiometer,
17... Rotating grindstone, 20... First comparison circuit, 2
1... Second comparison circuit, 22... Counter circuit, 23
... Launch circuit, 24... Clock circuit, 25...
・Third comparison circuit, 26... Constant value generation circuit, 27... Driver circuit, 28... Relay, 29...
...Solenoid valve, 30...Air cylinder, 31.
··Limit switch.
Claims (1)
径を測定してその測定値と基準値とを比較し、加工品（
１１）が真円の場合には測定値と基準値との差が零のと
きに研削終了信号を出力し、且つ、加工品（１１）が真
円でない場合には測定値と基準値との差が零になった時
点から加工品の真円度にほぼ比例する時間だけ遅れて研
削終了信号を出力する定寸制御装置（１０）を用いて加
工品の真円度を測定する方法であって、 測定値と基準値との差が零になった時点から研削が終了
するまでの時間を測定することにより加工品の真円度を
測定することを特徴とする精密量産部品の真円度測定方
法。 ２、測定値と基準値との差が零になった時点から研削が
終了するまでの時間の測定は、該差が零になった時点か
ら研削の終了に伴って測定値と基準値との差が所定レベ
ルに達する時点までの時間を測定することにより行なう
ことを特徴とする特許請求の範囲第１項に記載の精密量
産部品の真円度測定方法。 ３、測定値と基準値との差が零になった時点から研削が
終了するまでの時間が所定時間を越えた場合に不良品選
別のための信号を出力することを特徴とする特許請求の
範囲第１項又は第２項に記載の精密量産部品の真円度測
定方法。[Claims] 1. Measure the diameter of the workpiece (11) to be cylindrically ground during processing, compare the measured value with a reference value,
11) is a perfect circle, a grinding end signal is output when the difference between the measured value and the reference value is zero, and when the workpiece (11) is not a perfect circle, the difference between the measured value and the reference value is output. This is a method of measuring the roundness of a workpiece using a sizing control device (10) that outputs a grinding completion signal with a delay of a time approximately proportional to the roundness of the workpiece after the difference becomes zero. The roundness of precision mass-produced parts is characterized in that the roundness of the processed product is measured by measuring the time from the time when the difference between the measured value and the reference value becomes zero until the end of grinding. Measuring method. 2. The time from the time when the difference between the measured value and the reference value becomes zero until the end of grinding is measured from the time when the difference becomes zero until the end of grinding. The method for measuring the roundness of precision mass-produced parts according to claim 1, characterized in that the method is carried out by measuring the time until the difference reaches a predetermined level. 3. A patent claim characterized in that when the time from the time when the difference between the measured value and the reference value becomes zero until the end of grinding exceeds a predetermined time, a signal for selecting defective products is output. A method for measuring the roundness of precision mass-produced parts according to item 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10591885A JPS61292011A (en) | 1985-05-20 | 1985-05-20 | Measuring method for out-of-roundness of precise mass-rpoduced parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10591885A JPS61292011A (en) | 1985-05-20 | 1985-05-20 | Measuring method for out-of-roundness of precise mass-rpoduced parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61292011A true JPS61292011A (en) | 1986-12-22 |
| JPH0342771B2 JPH0342771B2 (en) | 1991-06-28 |
Family
ID=14420242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10591885A Granted JPS61292011A (en) | 1985-05-20 | 1985-05-20 | Measuring method for out-of-roundness of precise mass-rpoduced parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61292011A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5096253A (en) * | 1973-12-19 | 1975-07-31 | ||
| JPS5245955A (en) * | 1975-10-08 | 1977-04-12 | Toshiba Corp | Method for measuring characteristics of round test piece without any c ontact |
| JPS5625210U (en) * | 1980-07-17 | 1981-03-07 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5583709A (en) * | 1978-12-20 | 1980-06-24 | Lion Corp | Fluorine-containing preparation |
-
1985
- 1985-05-20 JP JP10591885A patent/JPS61292011A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5096253A (en) * | 1973-12-19 | 1975-07-31 | ||
| JPS5245955A (en) * | 1975-10-08 | 1977-04-12 | Toshiba Corp | Method for measuring characteristics of round test piece without any c ontact |
| JPS5625210U (en) * | 1980-07-17 | 1981-03-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0342771B2 (en) | 1991-06-28 |
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