JP2018017689A5 - - Google Patents
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- JP2018017689A5 JP2018017689A5 JP2016150318A JP2016150318A JP2018017689A5 JP 2018017689 A5 JP2018017689 A5 JP 2018017689A5 JP 2016150318 A JP2016150318 A JP 2016150318A JP 2016150318 A JP2016150318 A JP 2016150318A JP 2018017689 A5 JP2018017689 A5 JP 2018017689A5
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- JP
- Japan
- Prior art keywords
- frequency characteristic
- feed
- measurement
- reference value
- feed axis
- Prior art date
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- 238000005259 measurement Methods 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
Description
上記目的を達成するために、本発明のうち請求項１に記載の発明は、ＮＣ制御された工作機械の送り軸において、前記送り軸の正常状態とした周波数特性の基準値と測定時の周波数特性とを比較照合し、前記送り軸の異常を判定することを特徴とする。
請求項２に記載の発明は、請求項１に記載の発明において、前記送り軸の正常状態とした周波数特性の基準値と測定時の周波数特性との比較照合に係り、前記送り軸の正常状態とした周波数特性の基準値と測定時の周波数特性のゲインの差を求めることにより、前記送り軸の異常を判定することを特徴とする。
請求項３に記載の発明は、請求項２に記載の発明において、特定の周波数に対する応答性と送り軸の軸位置とを関連付けて取得しており、前記軸位置に関連した応答性の正常状態とする基準値と測定時の応答性とのゲインの差を求めることにより、前記送り軸の異常の判定することを特徴とする。
In order to achieve the above object, the invention according to claim 1 of the present invention is a feed shaft of an NC-controlled machine tool, wherein the reference value of the frequency characteristic in the normal state of the feed shaft and the frequency at the time of measurement A characteristic is compared and collated to determine an abnormality of the feed axis.
請 Motomeko invention described in 2 is the invention according to claim 1 relates to a comparison match between the reference value and the frequency characteristic of the measurement of normal state and the frequency characteristic of the feed axis, the normal of the feed shaft It is characterized in that the abnormality of the feed axis is determined by finding the difference between the reference value of the frequency characteristic in the state and the gain of the frequency characteristic at the time of measurement.
The invention described in 請 Motomeko 3 is the invention according to claim 2, has obtained in association with the axial position of the response and the feed axis with respect to the frequency of the particular, responsiveness associated with the shaft position It is characterized in that the abnormality of the feed axis is determined by obtaining the difference between the gain of the reference value in the normal state and the response at the time of measurement.
前記ブロック図の一例では応答を前記速度検出値と、入力を速度偏差とするオープンループ周波数特性と入力を速度指令値としたクローズドループ周波数特性が取得できる。本発明では前者オープンループ制御系の周波数特性を送り軸の異常判定方法に用いる一例として述べるが、これに限ることではない。 In an example of the block diagram, an open loop frequency characteristic in which a response is the speed detection value , an input is a speed deviation, and a closed loop frequency characteristic in which an input is a speed command value can be acquired. In the present invention, although the frequency characteristic of the former open loop control system is described as an example used for the abnormality determination method of the feed axis, it is not limited thereto.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016150318A JP6837771B2 (en) | 2016-07-29 | 2016-07-29 | Feed axis abnormality judgment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016150318A JP6837771B2 (en) | 2016-07-29 | 2016-07-29 | Feed axis abnormality judgment method |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2018017689A JP2018017689A (en) | 2018-02-01 |
| JP2018017689A5 true JP2018017689A5 (en) | 2019-06-13 |
| JP6837771B2 JP6837771B2 (en) | 2021-03-03 |
Family
ID=61081374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016150318A Active JP6837771B2 (en) | 2016-07-29 | 2016-07-29 | Feed axis abnormality judgment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6837771B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020022260A (en) * | 2018-07-31 | 2020-02-06 | 東洋電機製造株式会社 | Machine abnormality prediction device |
| KR20210080353A (en) * | 2018-10-29 | 2021-06-30 | 닛본 세이고 가부시끼가이샤 | A method for detecting a drop in preload of a ball screw and a direct-acting drive device |
| JP7000295B2 (en) | 2018-10-31 | 2022-01-19 | 株式会社日研工作所 | Feed shaft and worm gear abnormality judgment system |
| JP6806754B2 (en) * | 2018-11-13 | 2021-01-06 | ファナック株式会社 | Machine tool and vibration diagnosis support method |
| JP7436169B2 (en) | 2019-09-18 | 2024-02-21 | ファナック株式会社 | Diagnostic equipment and method |
| JP7412158B2 (en) * | 2019-12-18 | 2024-01-12 | オークマ株式会社 | Machine tool feed axis diagnosis device and feed axis diagnosis method |
| CN114063565A (en) * | 2020-08-03 | 2022-02-18 | 沈机（上海）智能系统研发设计有限公司 | Fault detection method and system for feed shaft of numerical control machine tool, medium and numerical control machine tool |
| US20240003781A1 (en) | 2020-11-27 | 2024-01-04 | Fanuc Corporation | Machine tool and diagnostic method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3829559B2 (en) * | 1999-11-29 | 2006-10-04 | 三菱電機株式会社 | Numerically controlled machine tool |
| JP4782766B2 (en) * | 2007-12-27 | 2011-09-28 | オークマ株式会社 | Machine diagnostic method and apparatus |
| JP5302639B2 (en) * | 2008-11-21 | 2013-10-02 | 三菱重工業株式会社 | Servo control device |
| JP2013164386A (en) * | 2012-02-13 | 2013-08-22 | Nsk Ltd | Ball screw abnormality diagnostic device and ball screw abnormality diagnostic method |
| JP5904025B2 (en) * | 2012-06-14 | 2016-04-13 | 日本精工株式会社 | Abnormality detection device and abnormality detection method for ball screw device |
-
2016
- 2016-07-29 JP JP2016150318A patent/JP6837771B2/en active Active
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