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1. JP2003326438 - TOOL ANOMALY DETECTOR

Office
Japon
Numéro de la demande 2002292809
Date de la demande 04.10.2002
Numéro de publication 2003326438
Date de publication 18.11.2003
Type de publication A
CIB
B23Q 17/09
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
23MACHINES-OUTILS; TRAVAIL DES MÉTAUX NON PRÉVU AILLEURS
QPARTIES CONSTITUTIVES, AMÉNAGEMENTS OU ACCESSOIRES DES MACHINES-OUTILS, p.ex. DISPOSITIONS POUR COPIER OU COMMANDER; MACHINES-OUTILS D'UTILISATION GÉNÉRALE, CARACTÉRISÉES PAR LA STRUCTURE DE CERTAINES PARTIES CONSTITUTIVES OU AMÉNAGEMENTS; COMBINAISONS OU ASSOCIATIONS DE MACHINES POUR LE TRAVAIL DES MÉTAUX, NE VISANT PAS UN TRAVAIL PARTICULIER
17Agencements sur les machines-outils pour indiquer ou mesurer
09pour indiquer ou mesurer la pression de coupe ou l'état de l'outil de coupe, p.ex. aptitude à la coupe, charge sur l'outil
B23B 49/00
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
23MACHINES-OUTILS; TRAVAIL DES MÉTAUX NON PRÉVU AILLEURS
BTOURNAGE; PERÇAGE
49Systèmes de mesure ou de calibrage des machines à aléser, pour le positionnement ou le guidage du foret; Dispositif pour indiquer les défauts des forets pendant l'alésage; Dispositifs à centrer les trous à aléser
CPC
G05B 19/4065
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
19Programme-control systems
02electric
18Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
406characterised by monitoring or safety
4065Monitoring tool breakage, life or condition
B23Q 17/0957
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING
17Arrangements for ; observing,; indicating or measuring on machine tools
09for indicating or measuring cutting pressure or ; for determining; cutting-tool condition, e.g. cutting ability, load on tool
0952during machining
0957Detection of tool breakage
B23Q 17/0961
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING
17Arrangements for ; observing,; indicating or measuring on machine tools
09for indicating or measuring cutting pressure or ; for determining; cutting-tool condition, e.g. cutting ability, load on tool
0952during machining
0961by measuring power, current or torque of a motor
G05B 2219/41372
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
2219Program-control systems
30Nc systems
41Servomotor, servo controller till figures
41372Force estimator using disturbance estimator observer
G05B 2219/50265
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
2219Program-control systems
30Nc systems
50Machine tool, machine tool null till machine tool work handling
50265If tool life over, continue machining only actual block, workability, then stop
Déposants FANUC LTD
ファナック株式会社
Inventeurs YASUKI KUNIHARU
安木 國晴
MAEKAWA SUSUMU
前川 進
Mandataires 竹本 松司
杉山 秀雄
湯田 浩一
魚住 高博
Données relatives à la priorité 2002054698 28.02.2002 JP
Titre
(EN) TOOL ANOMALY DETECTOR
(JA) 工具異常検出装置
Abrégé
(EN)

PROBLEM TO BE SOLVED: To accurately detect a tool anomaly and instruct replacement.

SOLUTION: In S1/S2, disturbance torque ys and yz acting on a main spindle motor and a Z-axis motor are estimated and they are stored in a data table. Until a time t0 passes from a starting point of time, S1 is repeated and pieces of data of ys and yz are gathered. The time t0 is slightly longer than times T1, T2 and T3. In S3, average values ysav1 and yzav1 (present situation estimates) from the present to the time T1 before are determined in regard to ys and yz. In S4, average values ysav23 and yzav23 from the present to between the time T2 before and the time T3 before are determined in regard to ys and yz. In S5, a movement fluctuation threshold is determined. In S6, the present situation estimates are compared with the threshold. If there is deviation from the threshold, it is determined that there is a tool anomaly, the procedure proceeds to S7, and a tool replacement signal is generated after finishing a machining cycle. A procedure of determining upper and lower limit bandwidths as the movement fluctuation threshold on the basis of an average waveform pattern of several prior machining cycles can be adopted also.

COPYRIGHT: (C)2004,JPO

(JA)


【課題】 工具異常の的確な検出と交換指示。


【解決手段】 S1/S2で、主軸モータとZ軸モータ
に働く外乱トルクys とyz を推定してデータテーブル
に記憶する。
スタート時点から時間t0 の経過するま
で、S1を繰り返し、ys とyz のデータを蓄積する。
時間t0 は、時間T1 、T2 及びT3 よりも少しだけ長
い。
S3で、ys 、yz について、現在から時間T1 前
までの平均値ysav1、yzav1(現状推定値)を求める。
S4でys 、yz について、現在から時間T2 前とT3
前の間の平均値ysav23 、yzav23 を求める。
S5で移
動変動しきい値を定める。
S6で現状推定値をしきい値
と比較する。
しきい値からの逸脱があれば、工具異常と
判定してS7へ進み、その加工サイクル終了を待って、
工具交換信号を生成する。
直前数加工サイクルの平均の
波形パターンに基いて上下限のバンド幅を移動変動しき
い値として定める手法も採用できる。

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