JP2000233368A - Chatter vibration detection method - Google Patents
Chatter vibration detection methodInfo
- Publication number
- JP2000233368A JP2000233368A JP11037103A JP3710399A JP2000233368A JP 2000233368 A JP2000233368 A JP 2000233368A JP 11037103 A JP11037103 A JP 11037103A JP 3710399 A JP3710399 A JP 3710399A JP 2000233368 A JP2000233368 A JP 2000233368A
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- chatter
- change
- magnitude
- chatter vibration
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
- B23Q17/0971—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring mechanical vibrations of parts of the machine
- B23Q17/0976—Detection or control of chatter
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、円筒研削盤のび
びり振動検出方法に関する。The present invention relates to a method for detecting chatter vibration of a cylindrical grinding machine.
【０００２】[0002]
【従来の技術】一般の機械加工において、円筒形状の被
研削物を研削するときには、びびり振動が発生すること
が多い。一般にこのびびり振動は、次の２種類の形態に
分類されている。2. Description of the Related Art In general machining, chatter vibration often occurs when grinding a cylindrical workpiece. Generally, the chatter vibration is classified into the following two types.
【０００３】一つは、工作機械の研削軸等の回転振動等
により生じる強制振動によるびびり振動である。そし
て、もう一つは、同一個所を複数回加工しながら全工程
を終了する場合に、工具と工作物との間の相対変位によ
り発生した工作物のうねりが、一回転後の工作時の工具
切り込み深さ変動を助長するため、うねり自身が成長し
て、びびり振動をともなう再生型自励振動である。[0003] One is chatter vibration caused by forced vibration generated by rotational vibration of a grinding shaft of a machine tool or the like. The other is that when the whole process is completed while machining the same part several times, the undulation of the workpiece caused by the relative displacement between the tool and the workpiece causes In order to promote the cutting depth variation, the swell itself grows and is a regenerative self-excited vibration accompanied by chatter vibration.
【０００４】そして、従来このようなびびり振動を検出
する方法としては、研削中の振動を適宜位置に配置した
振動検出器で検出し、周波数解析装置（FFTアナライザ
−）とパ−ソナルコンピュ−タにより解析評価し、判別
基準と比較してびびり振動を検出している。[0004] Conventionally, as a method of detecting such chatter vibration, a vibration during grinding is detected by a vibration detector arranged at an appropriate position, and a frequency analyzer (FFT analyzer) and a personal computer are used. , And chatter vibration is detected by comparison with a discrimination criterion.
【０００５】例えば、特開平８−１７４３７９号公報に
開示されたびびり振動の検出方法においては、図４に示
すように、研削盤２１の適宜位置に設置された振動検出
器２２により研削中の振動を検出し、検出した振動信号
を振動計２３を経てＦＦＴアナライザ−２４に入力す
る。このＦＦＴアナライザ−２４から出力される測定デ
−タは、これに接続されているパ−ソナルコンピュ−タ
２５に入力され、そこでびびり振動が発生しているか否
かが検知される。そして、びびり振動が発生している場
合には、ＮＣ研削盤２６に運転条件の変更指示が出さ
れ、研削盤２１の運転条件の変更が行なわれる。For example, in the method of detecting chatter vibration disclosed in Japanese Patent Application Laid-Open No. 8-174379, vibration during grinding is detected by a vibration detector 22 installed at an appropriate position on a grinding machine 21 as shown in FIG. Is detected, and the detected vibration signal is input to the FFT analyzer 24 via the vibrometer 23. The measurement data output from the FFT analyzer 24 is input to a personal computer 25 connected thereto, where it is detected whether chatter vibration has occurred. When chatter vibration occurs, an instruction to change the operating conditions is issued to the NC grinding machine 26, and the operating conditions of the grinding machine 21 are changed.
【０００６】このびびり振動の検出方法は、研削盤２１
の適宜位置の振動変位を測定し、図５に示すように、Ｆ
ＦＴ解析により得られた周波数毎の振動変位成分の大き
さを、びびり振動の有無のデ−タを基に設定されたしき
い値Ａとコンパレ−ト領域Ｂにより評価する方法であ
る。[0006] The method of detecting chatter vibration is described in US Pat.
The vibration displacement at an appropriate position is measured, and as shown in FIG.
In this method, the magnitude of the vibration displacement component for each frequency obtained by the FT analysis is evaluated based on a threshold value A and a comparison area B set based on data on the presence or absence of chatter vibration.
【０００７】この場合のしきい値Ａは、びびり振動が無
い時の振動波形ピ−ク値を基準にこれよりも高い値に設
定している。また、コンパレ−ト領域Ｂとは、びびり振
動があった時の振動波形ピ−ク値を基準に設ける領域の
ことである。The threshold value A in this case is set to a value higher than the peak value of the vibration waveform when there is no chatter vibration. The comparison area B is an area provided on the basis of a vibration waveform peak value when chattering occurs.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上述し
た従来のびびり振動の検出方法には、次のような問題点
がある。However, the above-mentioned conventional chatter vibration detecting method has the following problems.
【０００９】従来の検出方法におけるびびり振動の検出
性能は、しきい値Ａおよびコンパレ−ト領域Ｂの設定精
度と研削振動とびびりの程度に依存している。The performance of detecting a chatter vibration in the conventional detection method depends on the setting accuracy of the threshold value A and the comparison area B and the degree of the chatter vibration and the chatter.
【００１０】実際のびびり発生現象においては、研削振
動とびびり程度の相関には多少のバラツキがあるため、
ある時刻におけるしきい値Ａとコンパレ−ト領域Ｂによ
る判別のみでは、判別精度に問題があり、びびりが発生
していなくても、びびりが発生していると誤判別してし
まうこともあるので、特にびびり振動をびびり振動発生
の初期に、精度よく検出することは不可能である。In the actual chattering phenomenon, there is some variation in the correlation between the grinding vibration and the chattering degree.
If only the threshold value A and the comparison area B at a certain time are used for discrimination, there is a problem in the discrimination accuracy, and even if no chatter occurs, it may be erroneously determined that chatter has occurred. It is impossible to accurately detect chatter vibration at the beginning of chatter vibration generation.
【００１１】この発明は、従来技術の上述のような問題
点を解消するためになされたものであり、びびり振動を
びびり振動が発生した初期から精度よく検出することの
できるびびり振動検出方法を提供することを目的として
いる。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and provides a chatter vibration detecting method capable of detecting chatter vibration accurately from the beginning of the chatter vibration. It is intended to be.
【００１２】[0012]
【課題を解決するための手段】この発明に係るびびり振
動検出方法は、振動計で測定した研削中の円筒研削盤の
振動を、周波数解析装置および振動変化解析装置により
解析することにより、一定周波数帯域における振動の大
きさと一定時間内における振動の変化の度合を把握し、
把握した振動の大きさと振動の変化の度合をそれぞれの
びびり振動発生の判別基準値と比較し、振動の大きさお
よび振動の変化の度合の両方が判別基準値を超えた場合
に、びびり振動が発生していると判断するものである。A chatter vibration detecting method according to the present invention is characterized in that a vibration of a cylindrical grinding machine during grinding measured by a vibrometer is analyzed by a frequency analyzing device and a vibration change analyzing device, thereby obtaining a constant frequency. Grasp the magnitude of vibration in the band and the degree of change of vibration within a certain time,
The grasped magnitude of vibration and the degree of change in vibration are compared with the respective reference values for chatter vibration occurrence.If both the magnitude of vibration and the degree of change in vibration exceed the reference values, chatter vibration is reduced. It is determined that it has occurred.
【００１３】びびり振動を振動の大きさのみで判別する
と、研削振動とびびりの程度との相関にバラツキがある
ため、びびり振動をその発生初期において、検出するこ
とは困難である。If the chatter vibration is determined only by the magnitude of the vibration, there is a variation in the correlation between the grinding vibration and the degree of the chatter, so that it is difficult to detect the chatter vibration in the early stage of its occurrence.
【００１４】そこで、本発明のびびり振動の検出方法に
おいては、振動の大きさに加えて一定時間内における振
動の変化の度合を解析し、振動の大きさと振動の変化の
度合とからびびり振動の発生を判別するようにしてい
る。Therefore, in the chatter vibration detecting method according to the present invention, in addition to the magnitude of the vibration, the degree of change of the vibration within a predetermined time is analyzed, and the magnitude of the vibration, the degree of the change of the vibration, and the The occurrence is determined.
【００１５】このため、瞬時に振動の大きさがびびり振
動発生判別の基準値を超えたものまで、びびり振動と判
別することはなく、真のびびり振動のみをびびり振動と
して判別することができる。Therefore, it is possible to determine only true chatter vibration as chatter vibration without immediately discriminating chatter vibration until the vibration magnitude exceeds a reference value for chatter vibration occurrence determination.
【００１６】また、一定時間内における振動の変化の度
合を、連続的に把握していくことにより、びびり振動を
発生の初期において把握することができる。Further, by continuously grasping the degree of the change of the vibration within a certain period of time, the chatter vibration can be grasped at an early stage of occurrence.
【００１７】[0017]
【発明の実施の形態】この発明の実施の形態を、図面を
参照して説明する。図１は、本発明の実施の形態のびび
り検出方法を、圧延用ロ−ル研削盤に適用した場合に、
使用される機器の配置および構成を示す構成図である。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a case where the chatter detection method according to the embodiment of the present invention is applied to a rolling roll grinder.
FIG. 2 is a configuration diagram illustrating the arrangement and configuration of devices used.
【００１８】びびり振動を検出する機器は、ロ−ル受台
１に支持された圧延ロ−ル２の研削砥石３を支持する円
筒研削盤の研削砥石台４に配置した、研削中の水平方向
の振動速度を測定する振動速度計５と、振動速度計５に
より測定された振動速度の信号を増幅する振動速度計用
アンプ６と、増幅された振動速度の信号を入力して周波
数毎の振動の大きさおよび経時的な振動の大きさの変化
を解析する周波数解析装置７と、周波数解析装置７の解
析結果に基づいて、コンパレ−ト領域での振動の大きさ
および一定時間内における振動の大きさの変化の度合
を、びびり発生判別の基準値と比較して、びびりが発生
したか否かを判別するパ−ソナルコンピュ−タ８と、び
びり振動が発生したと判別されたときに、パ−ソナルコ
ンピュ−タ８からの信号によって点灯する回転灯９およ
び警報器１０とから構成されている。The apparatus for detecting chatter vibration is a horizontal direction during grinding, which is arranged on a grinding wheel table 4 of a cylindrical grinding machine that supports a grinding wheel 3 of a rolling roll 2 supported on a roll receiving table 1. A vibration speed meter 5 for measuring the vibration speed of the motor, a vibration speed meter amplifier 6 for amplifying the signal of the vibration speed measured by the vibration speed meter 5, and a vibration for each frequency by inputting the amplified vibration speed signal. Frequency analyzer 7 for analyzing the magnitude of the vibration and the magnitude of the vibration over time, and the magnitude of the vibration in the comparator region and the vibration of the vibration within a certain time based on the analysis result of the frequency analyzer 7. A personal computer 8 for comparing the degree of change in magnitude with a reference value for chatter occurrence determination to determine whether chatter has occurred, and when it is determined that chatter vibration has occurred, From the personal computer 8 And a rotating lamp 9 and the alarm device 10 Metropolitan lit by No..
【００１９】振動速度計５を研削砥石台４に配置したの
は、次のような理由による。すなわち、びびり振動発生
初期および中期において、ロ−ル受台１および研削砥石
台４における水平方向と上下方向の研削振動を振動セン
サ−で測定した。その結果、最大振幅が確認された場所
は研削砥石台４であり、しかも研削振動を水平方向に測
定したときが、最も大きい振幅となった。The vibration speed meter 5 is arranged on the grinding wheel base 4 for the following reason. That is, in the initial and middle stages of the occurrence of chatter vibration, the horizontal and vertical grinding vibrations of the roll receiving table 1 and the grinding wheel table 4 were measured by a vibration sensor. As a result, the place where the maximum amplitude was confirmed was the grinding wheel table 4, and the largest amplitude was obtained when the grinding vibration was measured in the horizontal direction.
【００２０】このように、研削砥石台４が研削振動の変
化に対して最も感受性が高く、さらには圧延用ロ−ル２
の研削中に研削反力が水平方向に作用する水平方向の測
定が最適である。As described above, the grinding wheel table 4 is most sensitive to a change in grinding vibration, and furthermore, the rolling roll 2
Optimum is measurement in the horizontal direction, in which the grinding reaction force acts in the horizontal direction during grinding.
【００２１】次に、上述したような機器を使用してびび
り振動を検出する本発明のびびり振動検出方法を説明す
る。このびびり振動検出方法においては、パ−ソナルコ
ンピュ−タ８に、びびり振動の発生を判別するために、
びびり振動の大きさのしきい値と、コンパレ−ト領域が
第一の判別手段として設定してある。このしきい値は、
例えばびびり許容程度に応じた研削振動速度成分の上限
値に設定する。また、コンパレ−ト領域の周波数範囲
は、研削するロ−ルの径や回転数等の研削条件より決定
される当該周波数の最大値および最小値に設定する。Next, a chatter vibration detecting method of the present invention for detecting chatter vibration using the above-described device will be described. In this chatter vibration detecting method, in order for the personal computer 8 to determine the occurrence of chatter vibration,
The threshold value of the magnitude of chatter vibration and the comparison area are set as first discriminating means. This threshold is
For example, it is set to the upper limit value of the grinding vibration speed component according to the allowable chatter. The frequency range of the comparator region is set to the maximum value and the minimum value of the frequency determined by the grinding conditions such as the diameter of the roll to be ground and the number of revolutions.
【００２２】また、同じくびびり振動の発生を判別する
ために、一定時間領域における研削振動の変化の度合の
しきい値が第二の判別手段として設定してある。このし
きい値は、びびり無しの状態からびびり発生の状態に推
移するときの振動変化程度を基準に設定する。Also, in order to determine the occurrence of chatter vibration, a threshold value of the degree of change of the grinding vibration in a certain time period is set as second determining means. This threshold value is set based on the degree of vibration change at the time of transition from a state without chatter to a state with chatter.
【００２３】そして、パ−ソナルコンピュ−タ８におい
ては、周波数解析装置７からの周波数毎の振動の大きさ
の信号が第一の判別手段で、同様に一定時間毎の振動の
大きさの変化の度合が第二の判別手段で、それぞれの判
別基準値と比較される。In the personal computer 8, the signal of the magnitude of the vibration for each frequency from the frequency analyzer 7 is used as the first discriminating means. Is compared with respective determination reference values by the second determination means.
【００２４】第一の判別手段によりびびり振動の発生を
検出する方法を、図２（ａ）および図２（ｂ）により説
明すると、図２（ａ）においては、振動の大きさは設定
されたしきい値Ａ以下で、設定されたコンパレ−ト領域
Ｂに無いので、びびり振動は発生していないと判断され
る。、図２（ｂ）においては、振動の大きさは設定され
たしきい値Ａを超え、設定されたコンパレ−ト領域Ｂに
あるので、びびり振動が発生していると判別される。A method for detecting the occurrence of chatter vibration by the first discriminating means will be described with reference to FIGS. 2A and 2B. In FIG. 2A, the magnitude of the vibration is set. Since it is below the threshold value A and is not in the set comparison area B, it is determined that chatter vibration has not occurred. In FIG. 2B, since the magnitude of the vibration exceeds the set threshold value A and is in the set comparison area B, it is determined that chatter vibration has occurred.
【００２５】第二の判別手段によりびびり振動の発生を
検出する方法を、図３により説明すると、測定された振
動速度の時間領域信号に対し、任意時間Δｔ（例えばロ
−ル３回転に要する時間）における振動速度の実効値の
一次回帰式を算出し、任意時間Δｔの時間領域における
最初と最後の実効値の比率Ｖrms t=t1／Ｖrms t=t2を求
め、この値がしきい値を超えた場合に、びびり振動が発
生していると判別される。A method for detecting the occurrence of chatter vibration by the second discriminating means will be described with reference to FIG. 3. An arbitrary time .DELTA.t (for example, the time required for three rotations of the roll) is given to the time domain signal of the measured vibration speed. ), The linear regression equation of the effective value of the vibration velocity is calculated, and the ratio Vrms t = t1 / Vrms t = t2 of the first and last effective values in the time domain of the arbitrary time Δt is obtained, and this value exceeds the threshold value. In this case, it is determined that chatter vibration has occurred.
【００２６】そして、両方の判別手段でびびり振動が発
生していると判別されたときのみ、真にびびり振動が発
生していると判別する。Only when it is determined that chatter vibration is occurring by both of the determination means, it is determined that true chatter vibration is occurring.
【００２７】[0027]
【発明の効果】この発明により、びびり振動を発生の初
期から把握することができるので、運転条件を変更して
研削能率の低下を防止することができるとともに、被研
削物にびびり振動にともなう表面疵が発生しないので、
被研削物の品質および原単位が向上する。According to the present invention, since the chatter vibration can be grasped from the beginning of the generation, the operating condition can be changed to prevent the reduction of the grinding efficiency, and the surface to be ground due to the chatter vibration of the workpiece can be prevented. No flaws occur,
The quality and basic unit of the workpiece are improved.
【図１】本発明の実施の形態のびびり検出方法を圧延用
ロ−ル研削盤に適用した場合に、使用される機器の配置
および構成を示す構成図である。FIG. 1 is a configuration diagram showing the arrangement and configuration of equipment used when a chatter detection method according to an embodiment of the present invention is applied to a rolling roll grinder.
【図２】本発明の実施の形態のびびり検出方法におい
て、第一の判別手段でびびり振動を判別する場合の説明
図であり、（ａ）はびびりが発生していない場合、
（ｂ）はびびりが発生している場合を示す。FIG. 2 is a diagram illustrating a case where chatter vibration is determined by a first determination unit in the chatter detection method according to the embodiment of the present invention. FIG.
(B) shows a case where chatter has occurred.
【図３】本発明の実施の形態のびびり検出方法におい
て、第二の判別手段でびびり振動を判別する場合の説明
図である。FIG. 3 is an explanatory diagram illustrating a case where chatter vibration is determined by a second determination unit in the chatter detection method according to the embodiment of the present invention;
【図4】従来のびびり振動抑制装置の概略構成を示す説
明図である。FIG. 4 is an explanatory diagram illustrating a schematic configuration of a conventional chatter vibration suppression device.
【図５】従来のびびり振動検出方法の説明図である。FIG. 5 is an explanatory diagram of a conventional chatter vibration detection method.
１ ロ−ル受台 ２ 圧延ロ−ル ３ 研削砥石 ４ 研削砥石台 ５ 振動速度計５ ６ 振動速度計用アンプ ７ 周波数解析装置 ８ パ−ソナルコンピュ−タ ９ 回転灯 １０ 警報器 DESCRIPTION OF SYMBOLS 1 Roll receiving stand 2 Rolling roll 3 Grinding wheel 4 Grinding wheel table 5 Vibration speed meter 5 6 Amplifier for vibration speed meter 7 Frequency analysis device 8 Personal computer 9 Rotary lamp 10 Alarm
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西森 道男 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 3C034 AA01 AA13 BB91 CA24 CB13 DD20 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Michio Nishimori 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. F-term (reference) 3C034 AA01 AA13 BB91 CA24 CB13 DD20
Claims (1)
振動を、周波数解析装置および振動変化解析装置により
解析することにより、一定周波数帯域における振動の大
きさと一定時間内における振動の変化の度合を把握し、
把握した振動の大きさと振動の変化の度合をそれぞれの
びびり振動発生の判別基準値と比較し、振動の大きさお
よび振動の変化の度合の両方が判別基準値を超えた場合
に、びびり振動が発生していると判断することを特徴と
するびびり振動検出方法。The vibration of a cylindrical grinder during grinding measured by a vibrometer is analyzed by a frequency analyzing device and a vibration change analyzing device, so that the magnitude of the vibration in a certain frequency band and the change of the vibration in a certain time are analyzed. Grasp the degree,
The grasped magnitude of vibration and the degree of vibration change are compared with the respective reference values for chattering vibration occurrence. A chatter vibration detecting method, wherein it is determined that a chatter has occurred.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11037103A JP2000233368A (en) | 1999-02-16 | 1999-02-16 | Chatter vibration detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11037103A JP2000233368A (en) | 1999-02-16 | 1999-02-16 | Chatter vibration detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000233368A true JP2000233368A (en) | 2000-08-29 |
Family
ID=12488266
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11037103A Pending JP2000233368A (en) | 1999-02-16 | 1999-02-16 | Chatter vibration detection method |
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| Country | Link |
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| JP (1) | JP2000233368A (en) |
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|---|---|---|---|---|
| JP2005014019A (en) * | 2003-06-24 | 2005-01-20 | Toyota Motor Corp | Device for adjusting shape of electrode tip, structure and method for detecting poor adjustment of shape of electrode tip |
| EP1645362A1 (en) * | 2004-07-20 | 2006-04-12 | BALANCE SYSTEMS S.p.A. | An Apparatus for detecting vibrations in a machine tool |
| JP2008290164A (en) * | 2007-05-22 | 2008-12-04 | Okuma Corp | Vibration attenuator of machine tool |
| JP2012047707A (en) * | 2010-08-30 | 2012-03-08 | Okuma Corp | Vibration detector, vibration suppression device, and vibration information display device |
| JP2012152835A (en) * | 2011-01-24 | 2012-08-16 | Okuma Corp | Vibration determination device |
| EP2497600A1 (en) | 2011-03-10 | 2012-09-12 | JTEKT Corporation | Chattering detection method for machine tool |
| JP2013036912A (en) * | 2011-08-10 | 2013-02-21 | Jtekt Corp | Chattering vibration detection device |
| CN112809462A (en) * | 2019-11-18 | 2021-05-18 | 株式会社捷太格特 | Flutter evaluation system |
| CN113226581A (en) * | 2018-12-27 | 2021-08-06 | 杰富意钢铁株式会社 | Method for detecting chatter of cold rolling mill, device for detecting chatter of cold rolling mill, cold rolling method, and cold rolling mill |
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1999
- 1999-02-16 JP JP11037103A patent/JP2000233368A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005014019A (en) * | 2003-06-24 | 2005-01-20 | Toyota Motor Corp | Device for adjusting shape of electrode tip, structure and method for detecting poor adjustment of shape of electrode tip |
| EP1645362A1 (en) * | 2004-07-20 | 2006-04-12 | BALANCE SYSTEMS S.p.A. | An Apparatus for detecting vibrations in a machine tool |
| US7430916B2 (en) | 2004-07-20 | 2008-10-07 | Balance Systems S.R.L. | Apparatus for detecting vibrations in a machine tool |
| JP2008290164A (en) * | 2007-05-22 | 2008-12-04 | Okuma Corp | Vibration attenuator of machine tool |
| JP2012047707A (en) * | 2010-08-30 | 2012-03-08 | Okuma Corp | Vibration detector, vibration suppression device, and vibration information display device |
| JP2012152835A (en) * | 2011-01-24 | 2012-08-16 | Okuma Corp | Vibration determination device |
| EP2497600A1 (en) | 2011-03-10 | 2012-09-12 | JTEKT Corporation | Chattering detection method for machine tool |
| US9463545B2 (en) | 2011-03-10 | 2016-10-11 | Jtekt Corporation | Chattering detection method for machine tool |
| JP2013036912A (en) * | 2011-08-10 | 2013-02-21 | Jtekt Corp | Chattering vibration detection device |
| CN113226581A (en) * | 2018-12-27 | 2021-08-06 | 杰富意钢铁株式会社 | Method for detecting chatter of cold rolling mill, device for detecting chatter of cold rolling mill, cold rolling method, and cold rolling mill |
| CN113226581B (en) * | 2018-12-27 | 2023-01-17 | 杰富意钢铁株式会社 | Method for detecting chatter of cold rolling mill, device for detecting chatter of cold rolling mill, cold rolling method, and cold rolling mill |
| US11779978B2 (en) | 2018-12-27 | 2023-10-10 | Jfe Steel Corporation | Chattering detection method for cold rolling mill, chattering detection device for cold rolling mill, cold rolling method, and cold rolling mill |
| CN112809462A (en) * | 2019-11-18 | 2021-05-18 | 株式会社捷太格特 | Flutter evaluation system |
| CN112809462B (en) * | 2019-11-18 | 2024-04-09 | 株式会社捷太格特 | Flutter Evaluation System |
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