JP2018028865A - Machine with rotation axis - Google Patents

Machine with rotation axis Download PDF

Info

Publication number
JP2018028865A
JP2018028865A JP2016161408A JP2016161408A JP2018028865A JP 2018028865 A JP2018028865 A JP 2018028865A JP 2016161408 A JP2016161408 A JP 2016161408A JP 2016161408 A JP2016161408 A JP 2016161408A JP 2018028865 A JP2018028865 A JP 2018028865A
Authority
JP
Japan
Prior art keywords
rolling bearing
rolling
control device
speed
graph
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.)
Pending
Application number
JP2016161408A
Other languages
Japanese (ja)
Inventor
一成 小池
Kazunari Koike
一成 小池
直樹 川田
Naoki Kawada
直樹 川田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Okuma Corp
Original Assignee
Okuma Corp
Okuma Machinery Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Okuma Corp, Okuma Machinery Works Ltd filed Critical Okuma Corp
Priority to JP2016161408A priority Critical patent/JP2018028865A/en
Publication of JP2018028865A publication Critical patent/JP2018028865A/en
Pending legal-status Critical Current

Links

Images

Abstract

PROBLEM TO BE SOLVED: To provide a machine with a rotation axis capable of easily diagnosing a state of a rolling bearing without requiring any expertise, expensive device or the like.SOLUTION: The machine with a rotation axis creates and displays a graph which represents friction coefficient on the vertical axis and, on the horizontal axis, a value of a product in which the viscosity of lubricating oil and the rolling speed is divided by present precompression, and displays information relevant to the diagnose of the rolling bearing 3 such as: rotation speed of a main shaft 2; temperature of cooling oil; built-in precompression of rolling bearings 3, 3; present precompression on each rolling bearing 3; rolling speed; friction torque; friction coefficient; total calorific value of rolling bearings 3, 3; calorific value of each rolling bearing 3; viscosity of lubricating oil and the like on a display unit 10. Accordingly, different from convention, since there is no necessity to measure vibrations and/or noises, analysis of frequency based on the measurement result, or requires no expertise, expensive device or the like, even a worker with insufficient work experiences can easily diagnose a state of the rolling bearings at a low cost.SELECTED DRAWING: Figure 1

Description

本発明は、たとえば工具又はワークを回転させながら加工するための回転軸装置を備えた機械に関するものである。   The present invention relates to a machine provided with a rotary shaft device for processing while rotating a tool or a workpiece, for example.

回転軸を回転させて加工を行う工作機械（たとえば特許文献１）には、回転軸を軸支するための転がり軸受が設けられている。しかしながら、転がり軸受の転走面の摩耗が進行すると、びびり振動の発生の原因となったり、加工精度が悪化したりする。そして、さらに摩耗が進行すると、転がり軸受が焼き付いて工作機械が動作停止してしまうおそれがある。そこで、そのような問題が発生しないように、回転軸の回転時の振動や音等を測定し、その測定結果をもとに周波数分析を行うとともに、その分析結果にもとづいて転がり軸受の状態を診断しようという方法がある。   A machine tool (for example, Patent Document 1) that performs processing by rotating a rotating shaft is provided with a rolling bearing for supporting the rotating shaft. However, when wear on the rolling contact surface of the rolling bearing progresses, chatter vibrations may occur or machining accuracy may deteriorate. If the wear further progresses, the rolling bearing may be seized and the machine tool may stop operating. Therefore, in order to prevent such problems from occurring, vibration and sound during rotation of the rotating shaft are measured, frequency analysis is performed based on the measurement results, and the state of the rolling bearing is determined based on the analysis results. There is a way to make a diagnosis.

特開２０００−２４８１１号公報JP 2000-24811 A

しかしながら、上記従来の方法は専門知識や経験を有するため、作業経験に乏しい作業者等には不向きであるという問題がある。また、センサや周波数分析装置等は高額で、コストの点においても問題がある。   However, since the above conventional methods have specialized knowledge and experience, there is a problem that they are not suitable for workers with poor work experience. Also, sensors and frequency analyzers are expensive and have problems in terms of cost.

そこで、本発明は、上記問題に鑑みなされたものであって、専門知識や高額な装置等を要することなく、容易に転がり軸受の状態を診断することができる回転軸を有する機械を提供しようとするものである。   Therefore, the present invention has been made in view of the above problems, and an attempt is made to provide a machine having a rotating shaft that can easily diagnose the state of a rolling bearing without requiring specialized knowledge or expensive equipment. To do.

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、回転軸を転がり軸受にて軸支した回転軸装置と、前記転がり軸受の温度を検出するための温度検出手段、前記回転軸の速度を検出するための回転速度検出手段、及び表示手段を有する制御装置とを備えた回転軸を有する機械であって、前記制御装置は、前記転がり軸受の状態を診断するための情報として、前記転がり軸受の温度と、前記制御装置で算出する前記転がり軸受の転がり速度と、前記制御装置で算出する前記転がり軸受の摩擦トルクと、前記制御装置で算出する前記転がり軸受の摩擦係数と、前記制御装置で算出する前記転がり軸受の発熱量と、前記制御装置で算出する前記転がり軸受における潤滑油粘度と、前記制御装置で算出する前記転がり軸受の現在の予圧とのうちの少なくとも何れか１つを、数値及び／又はグラフにて前記表示手段に表示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、前記制御装置は、前記摩擦係数と、前記潤滑油粘度と前記転がり速度との積を前記転がり軸受の現在の予圧で除した値との関係をグラフにて前記表示手段に表示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、前記制御装置は、前記摩擦係数と、前記潤滑油粘度と前記転がり速度との積を前記転がり軸受の現在の予圧で除した値との関係を表すグラフを記憶するとともに、今回のグラフを表示するにあたり、過去のグラフと重ねて表示することを特徴とする。
請求項４に記載の発明は、請求項１〜３の何れかに記載の発明において、前記制御装置は、前記転がり軸受の状態を診断するための情報を記憶するとともに、今回の情報を前記表示手段に表示するにあたり、過去の情報と今回の情報との両方を表示することを特徴とする。 In order to achieve the above object, the invention described in claim 1 of the present invention is a rotary shaft device in which a rotary shaft is supported by a rolling bearing, and a temperature detecting means for detecting the temperature of the rolling bearing, A machine having a rotation shaft comprising a rotation speed detection means for detecting the speed of the rotation shaft and a control device having a display means, the control device for diagnosing the state of the rolling bearing As information, the temperature of the rolling bearing, the rolling speed of the rolling bearing calculated by the control device, the friction torque of the rolling bearing calculated by the control device, and the friction coefficient of the rolling bearing calculated by the control device. The calorific value of the rolling bearing calculated by the control device, the lubricating oil viscosity in the rolling bearing calculated by the control device, and the current prediction of the rolling bearing calculated by the control device. At least any one of the a, and displaying on said display means in numerical and / or graphs.
According to a second aspect of the present invention, in the first aspect of the present invention, the control device divides the product of the friction coefficient, the lubricating oil viscosity, and the rolling speed by the current preload of the rolling bearing. The relationship with the value is displayed on the display means as a graph.
According to a third aspect of the present invention, in the second aspect of the present invention, the control device divides the product of the friction coefficient, the lubricant viscosity, and the rolling speed by the current preload of the rolling bearing. A graph representing the relationship with the value is stored, and when displaying the current graph, the graph is displayed so as to overlap with the past graph.
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the control device stores information for diagnosing the state of the rolling bearing and displays the current information in the display. In displaying on the means, both past information and current information are displayed.

本発明によれば、転がり軸受の状態を診断するための情報として、転がり軸受の温度と、制御装置で算出される転がり軸受の転がり速度と、制御装置で算出される転がり軸受の摩擦トルクと、制御装置で算出される転がり軸受の摩擦係数と、制御装置で算出される転がり軸受の発熱量と、制御装置で算出される転がり軸受における潤滑油粘度と、制御装置で算出される転がり軸受の現在の予圧とのうちの少なくとも何れか１つが、数値及び／又はグラフにて表示手段に表示されるようになっており、作業者はその情報にもとづいて転がり軸受の状態を診断すればよい。したがって、従来のように振動や音等を測定したり、その測定結果をもとに周波数分析を行ったりする必要がないことから、専門知識や高額な装置等が必要でなく、低コストで、且つ、作業経験に乏しいような作業者であっても容易に転がり軸受の状態を診断することができる。
また、特に請求項３や請求項４に記載の発明によれば、過去のグラフや情報と現在のグラフや情報とが両方表示されるため、転がり軸受の状態の変化が非常にわかりやすく、正確且つ迅速に転がり軸受の状態を診断することができる。 According to the present invention, as information for diagnosing the state of the rolling bearing, the temperature of the rolling bearing, the rolling speed of the rolling bearing calculated by the control device, the friction torque of the rolling bearing calculated by the control device, The friction coefficient of the rolling bearing calculated by the control device, the calorific value of the rolling bearing calculated by the control device, the lubricating oil viscosity in the rolling bearing calculated by the control device, and the current rolling bearing calculated by the control device At least one of the preloads is displayed on the display means as a numerical value and / or a graph, and the operator may diagnose the state of the rolling bearing based on the information. Therefore, it is not necessary to measure vibration or sound as in the past, or to perform frequency analysis based on the measurement result, so specialized knowledge and expensive equipment are not required, and at low cost, In addition, even a worker who has little work experience can easily diagnose the state of the rolling bearing.
In particular, according to the invention described in claim 3 or claim 4, since both the past graph and information and the current graph and information are displayed, the change in the state of the rolling bearing is very easy to understand and accurate. And the state of a rolling bearing can be diagnosed rapidly.

工作機械を示した説明図である。It is explanatory drawing which showed the machine tool. 表示装置に表示される転がり軸受の診断に係るグラフを示した説明図である。It is explanatory drawing which showed the graph which concerns on the diagnosis of the rolling bearing displayed on a display apparatus. 転がり軸受の状態の診断に係る制御について示したフローチャート図である。It is the flowchart figure shown about the control which concerns on the diagnosis of the state of a rolling bearing.

以下、本発明の一実施形態となる軸受の状態の診断機能を有する工作機械について、図面にもとづき詳細に説明する。   Hereinafter, a machine tool having a function of diagnosing a bearing state according to an embodiment of the present invention will be described in detail with reference to the drawings.

図１は、工作機械２０を示した説明図である。
工作機械２０は、主軸装置１、制御装置７、冷却油循環装置１１、及び潤滑油供給装置１２を有する。主軸装置１は、回転軸としての主軸２と、主軸２を軸支する複数の転がり軸受３、３と、主軸２を回転させるための図示しない駆動装置とを備えてなるものであって、主軸２の先端には、図示しない工具を装着可能となっている。また、主軸装置１には、主軸２を冷却する冷却油を循環させるための冷却油循環装置１１と、転がり軸受３、３へ潤滑油を供給するための潤滑油供給装置１２とが接続されている。さらに、主軸装置１には、主軸２の内部を流れる冷却油の温度を測定するための温度センサ５と、主軸２の回転速度を検出するための回転速度検出部６とが設けられている。一方、制御装置７は、主軸装置１の動作を制御するとともに、主軸装置１における転がり軸受３、３の状態を診断するためのものであって、温度センサ５により測定された冷却油の温度に係る情報や、回転速度検出部６により検出された主軸２の回転速度等にもとづいて種々の演算を行う演算装置８、記憶装置９、及び表示装置１０が備えられている。 FIG. 1 is an explanatory view showing a machine tool 20.
The machine tool 20 includes a spindle device 1, a control device 7, a cooling oil circulation device 11, and a lubricating oil supply device 12. The main shaft device 1 includes a main shaft 2 as a rotating shaft, a plurality of rolling bearings 3 and 3 that support the main shaft 2, and a driving device (not shown) for rotating the main shaft 2. A tool (not shown) can be attached to the tip of 2. The spindle device 1 is connected with a cooling oil circulation device 11 for circulating cooling oil for cooling the spindle 2 and a lubricating oil supply device 12 for supplying lubricating oil to the rolling bearings 3 and 3. Yes. Further, the spindle device 1 is provided with a temperature sensor 5 for measuring the temperature of the cooling oil flowing inside the spindle 2 and a rotation speed detector 6 for detecting the rotation speed of the spindle 2. On the other hand, the control device 7 controls the operation of the main shaft device 1 and diagnoses the state of the rolling bearings 3 and 3 in the main shaft device 1, and adjusts the temperature of the cooling oil measured by the temperature sensor 5. An arithmetic device 8, a storage device 9, and a display device 10 are provided for performing various calculations based on such information, the rotational speed of the spindle 2 detected by the rotational speed detector 6, and the like.

ここで、本発明の要部となる制御装置７による転がり軸受３の状態の診断に係る制御について、図３のフローチャート図に沿って説明する。
まず、事前に、制御装置７による制御のもと、主軸２を所定の診断用回転速度で回転させた後、当該状態から駆動装置をＯＦＦとして主軸２を惰性で回転させ、その惰性回転開始時に主軸２の内部を流れる冷却油の温度を温度センサ５で測定するとともに、その測定値をもとに駆動装置及び転がり軸受３を発熱源とした伝熱解析を行い、その解析結果を記憶装置９に記憶させておく。 Here, the control which concerns on the diagnosis of the state of the rolling bearing 3 by the control apparatus 7 used as the principal part of this invention is demonstrated along the flowchart figure of FIG.
First, after the main shaft 2 is rotated at a predetermined diagnostic rotation speed under the control of the control device 7 in advance, the driving device is turned off from this state to rotate the main shaft 2 by inertia, and when the inertia rotation starts. The temperature of the cooling oil flowing inside the main shaft 2 is measured by the temperature sensor 5, and heat transfer analysis is performed using the drive device and the rolling bearing 3 as a heat source based on the measured value, and the analysis result is stored in the storage device 9. Remember me.

そして、主軸装置１の転がり軸受３の状態を診断するにあたって、制御装置７は、上記同様に主軸２を診断用回転速度で回転させた（Ｓ１）後、駆動装置をＯＦＦとして主軸２を惰性で回転させる（Ｓ２）。また、惰性回転の開始時に主軸２の内部を流れる冷却油の温度を温度センサ５で測定する（Ｓ３）とともに、その測定値や予め記憶されている伝熱解析の解析結果、診断用回転速度等から、転がり軸受３の発熱量及び転走面の温度を推定する（Ｓ４）。さらに、それらの推定結果や予め記憶装置９に記憶されている転がり軸受３の組み込み予圧等をもとに、転がり軸受３の現在の予圧、摩擦係数、及び潤滑油粘度を算出する（Ｓ５）。一方、回転速度検出部６により、惰性回転開始からの主軸２の回転速度の経時的変化を読み取るとともに、主軸２の回転速度にもとづいて転がり軸受３の転がり速度を算出する（Ｓ６）。   Then, in diagnosing the state of the rolling bearing 3 of the main shaft device 1, the control device 7 rotates the main shaft 2 at the diagnostic rotational speed in the same manner as described above (S1), and then turns off the driving device to make the main shaft 2 inertial. Rotate (S2). Further, the temperature of the cooling oil flowing inside the main shaft 2 at the start of inertial rotation is measured by the temperature sensor 5 (S3), the measured value, the analysis result of the heat transfer analysis stored in advance, the rotational speed for diagnosis, etc. From this, the calorific value of the rolling bearing 3 and the temperature of the rolling surface are estimated (S4). Further, the current preload, the friction coefficient, and the lubricating oil viscosity of the rolling bearing 3 are calculated based on the estimation result and the built-in preload of the rolling bearing 3 stored in the storage device 9 in advance (S5). On the other hand, the rotational speed detector 6 reads the change over time in the rotational speed of the main shaft 2 from the start of inertial rotation, and calculates the rolling speed of the rolling bearing 3 based on the rotational speed of the main shaft 2 (S6).

そして、縦軸が摩擦係数、横軸が潤滑油粘度と転がり速度との積を現在の予圧で除した値とされたグラフ（すなわち、転がり軸受３の診断に係るグラフ）、及びたとえば主軸２の回転速度や冷却油温度、転がり軸受３、３の組み込み予圧、各転がり軸受３の現在の予圧、転がり速度、摩擦トルク、摩擦係数、転がり軸受３、３の総発熱量、各転がり軸受３の発熱量、潤滑油粘度等の転がり軸受３の診断に係る情報を表示装置１０に表示するとともに、当該診断に係るグラフや情報を記憶装置９に記憶する（Ｓ７）。このとき、転がり軸受３の転走面の摩耗が進行すると、摩擦係数や転がり速度に変化が生じ、Ｓ７で作成するグラフも以前作成するグラフとは異なるものとなる。そこで、グラフを表示するにあたっては、図２に示す如く、過去のグラフと現在のグラフとを重ねて表示する。また、診断に係る情報については、数値そのものを表示してもよいし、グラフとして表示してもよく、更にはその両方を表示してもよい。   A graph in which the vertical axis represents the friction coefficient, the horizontal axis represents the product of the lubricant viscosity and the rolling speed divided by the current preload (that is, a graph relating to the diagnosis of the rolling bearing 3), and for example the spindle 2 Rotational speed and cooling oil temperature, built-in preload of the rolling bearings 3 and 3, current preload of each rolling bearing 3, rolling speed, friction torque, friction coefficient, total heat generation of the rolling bearings 3 and 3, heating of each rolling bearing 3 Information related to the diagnosis of the rolling bearing 3, such as the amount and the lubricating oil viscosity, is displayed on the display device 10, and a graph and information related to the diagnosis are stored in the storage device 9 (S7). At this time, if the wear of the rolling surface of the rolling bearing 3 proceeds, the friction coefficient and the rolling speed change, and the graph created in S7 is also different from the graph created earlier. Therefore, when displaying the graph, as shown in FIG. 2, the past graph and the current graph are overlapped and displayed. As for the information related to the diagnosis, the numerical value itself may be displayed, may be displayed as a graph, or both of them may be displayed.

以上のような構成を有する工作機械２０によれば、惰性回転の開始時に主軸２の内部を流れる冷却油の温度を温度センサ５で測定するとともに、その測定値や予め記憶されている伝熱解析の解析結果、診断用回転速度等から、転がり軸受３の発熱量及び転走面の温度を推定し、それらの推定結果や予め記憶装置９に記憶されている転がり軸受３の組み込み予圧等をもとに、転がり軸受３の現在の予圧、摩擦係数、及び潤滑油粘度を算出する（Ｓ５）。また、回転速度検出部６により、惰性回転開始からの主軸２の回転速度の経時的変化を読み取るとともに、主軸２の回転速度にもとづいて転がり軸受３の転がり速度を算出する。そして、縦軸が摩擦係数、横軸が潤滑油粘度と転がり速度との積を現在の予圧で除した値とされたグラフ、及びたとえば主軸２の回転速度や冷却油温度、転がり軸受３、３の組み込み予圧、各転がり軸受３の現在の予圧、転がり速度、摩擦トルク、摩擦係数、転がり軸受３、３の総発熱量、各転がり軸受３の発熱量、潤滑油粘度等の転がり軸受３の診断に係る情報を表示装置１０に表示する。したがって、従来のように振動や音等を測定したり、その測定結果をもとに周波数分析を行ったりする必要がないことから、専門知識や高額な装置等が必要でなく、低コストで、且つ、作業経験に乏しいような作業者であっても容易に転がり軸受の状態を診断することができ、ひいては転がり軸受３、３の異常を検出することができる。   According to the machine tool 20 having the above-described configuration, the temperature of the cooling oil flowing inside the main shaft 2 is measured by the temperature sensor 5 at the start of inertial rotation, and the measured value and the heat transfer analysis stored in advance are measured. The heat generation amount of the rolling bearing 3 and the temperature of the rolling surface are estimated from the analysis result, the rotational speed for diagnosis, and the like, and the estimation result and the built-in preload of the rolling bearing 3 stored in the storage device 9 in advance are also obtained. In addition, the current preload, friction coefficient, and lubricating oil viscosity of the rolling bearing 3 are calculated (S5). Further, the rotational speed detection unit 6 reads a change with time in the rotational speed of the main shaft 2 from the start of inertial rotation, and calculates the rolling speed of the rolling bearing 3 based on the rotational speed of the main shaft 2. The vertical axis represents the friction coefficient, the horizontal axis represents the value obtained by dividing the product of the lubricating oil viscosity and the rolling speed by the current preload, and the rotational speed and cooling oil temperature of the main shaft 2, the rolling bearings 3, 3 and the like. Rolling bearings 3 such as pre-loading preload, current preload of each rolling bearing 3, rolling speed, friction torque, friction coefficient, total heating value of rolling bearings 3, 3, heating value of each rolling bearing 3, lubricating oil viscosity, etc. Is displayed on the display device 10. Therefore, it is not necessary to measure vibration or sound as in the past, or to perform frequency analysis based on the measurement result, so specialized knowledge and expensive equipment are not required, and at low cost, In addition, even a worker who has little work experience can easily diagnose the state of the rolling bearing, and consequently, the abnormality of the rolling bearings 3 and 3 can be detected.

また、縦軸が摩擦係数、横軸が潤滑油粘度と転がり速度との積を現在の予圧で除した値とされたグラフを作成・表示するにあたり、過去のグラフと現在のグラフとを重ねて表示する。したがって、転がり軸受３、３の状態の変化が非常にわかりやすく、正確且つ迅速に転がり軸受の状態を診断することができ、ひいては転がり軸受３、３の異常を早期に検出することができる。   Also, when creating and displaying a graph with the vertical axis representing the friction coefficient and the horizontal axis representing the product of the lubricant viscosity and rolling speed divided by the current preload, the past graph and the current graph are superimposed. indicate. Therefore, the change in the state of the rolling bearings 3 and 3 is very easy to understand, the state of the rolling bearing can be diagnosed accurately and quickly, and thus the abnormality of the rolling bearings 3 and 3 can be detected at an early stage.

なお、本発明の工作機械に係る構成は、上記実施形態に何ら限定されるものではなく、機械全体の構成は勿論、転がり軸受の状態の診断に係る制御等に係る構成についても、本発明の趣旨を逸脱しない範囲で必要に応じて適宜変更可能である。   The configuration related to the machine tool of the present invention is not limited to the above-described embodiment, and the configuration related to the control related to the diagnosis of the state of the rolling bearing as well as the configuration of the entire machine is not limited to the configuration of the present invention. As long as it does not deviate from the meaning, it can change suitably as needed.

たとえば、上記実施形態では、転がり軸受の状態の診断に係る情報として、主軸の回転速度や冷却油温度、転がり軸受の組み込み予圧、各転がり軸受の現在の予圧、転がり速度、摩擦トルク、摩擦係数、転がり軸受の総発熱量、各転がり軸受の発熱量、潤滑油粘度の全てを表示するとしているが、少なくとも冷却油温度と、転がり軸受の現在の予圧と、転がり速度と、摩擦トルクと、摩擦係数と、転がり軸受の発熱量と、潤滑油粘度との何れか１つを表示するように構成すれば、転がり軸受の状態を診断することは可能である。
また、回転軸の回転速度や転がり軸受の組み込み予圧に関しては、表示しても表示しなくてもどちらでもよい。 For example, in the above embodiment, as information related to the diagnosis of the state of the rolling bearing, the rotation speed and cooling oil temperature of the main shaft, the built-in preload of the rolling bearing, the current preload of each rolling bearing, the rolling speed, the friction torque, the friction coefficient, The total calorific value of the rolling bearing, the calorific value of each rolling bearing, and the lubricating oil viscosity are all displayed, but at least the cooling oil temperature, the current preload of the rolling bearing, the rolling speed, the friction torque, and the friction coefficient If the heat generation amount of the rolling bearing and the viscosity of the lubricating oil are displayed, it is possible to diagnose the state of the rolling bearing.
Further, the rotational speed of the rotary shaft and the built-in preload of the rolling bearing may be displayed or not displayed.

さらに、転がり軸受の発熱量や、転がり軸受の現在の予圧を表示するにあたっては、たとえば全ての転がり軸受の総発熱量を表示するように構成してもよいし、各転がり軸受毎に発熱量や現在の予圧を表示する（たとえば主軸の先端側のフロント転がり軸受と、基端側のリア転がり軸受とに分けて表示する）ように構成してもよく、当然ではあるが、総発熱量と各転がり軸受毎の情報との両方を表示するように構成しても何ら問題はない。
さらにまた、上記実施形態では、縦軸が摩擦係数、横軸が潤滑油粘度と転がり速度との積を現在の予圧で除した値とされたグラフを作成・表示するとしているが、縦軸と横軸とが逆のグラフであっても何ら問題はないし、このようなグラフは表示しない（上記診断に係る情報のみを表示する）とすることも可能である。 Furthermore, when displaying the calorific value of the rolling bearing and the current preload of the rolling bearing, for example, the total calorific value of all the rolling bearings may be displayed. The current preload may be displayed (for example, the front rolling bearing on the front end side of the main shaft and the rear rolling bearing on the base end side are displayed separately). There is no problem even if it is configured to display both the information for each rolling bearing.
Furthermore, in the above embodiment, the vertical axis represents the friction coefficient, and the horizontal axis represents a product obtained by dividing the product of the lubricating oil viscosity and the rolling speed by the current preload. There is no problem even if the graph is opposite to the horizontal axis, and such a graph may not be displayed (only information related to the diagnosis is displayed).

またさらに、上記実施形態では、温度センサの設置位置について特に言及していないものの、その設置位置は回転軸装置の静止部であることが好ましいものの、転がり軸受の温度を測定可能であれば、温度センサの設置位置が限定されることはない。
加えて、上記実施形態では、回転軸を惰性回転させ、その間に転がり軸受の状態を診断するとしているが、惰性回転中ではなく、駆動装置による回転中に各種情報を算出し、表示手段に表示するように構成することも可能である。 Furthermore, in the above embodiment, although no particular mention is made of the installation position of the temperature sensor, it is preferable that the installation position is a stationary part of the rotary shaft device, but if the temperature of the rolling bearing can be measured, The installation position of the sensor is not limited.
In addition, in the above-described embodiment, the rotating shaft is inertially rotated and the state of the rolling bearing is diagnosed during the inertial rotation. However, not the inertial rotation but various information is calculated during the rotation by the driving device and displayed on the display means. It is also possible to configure so as to.

また、上記実施形態では、回転軸の内部を流れる冷却油の温度を測定し、その測定値をもとにして転がり軸受の温度を検出する（推定する）としているが、要は転がり軸受の温度が検出可能であればよい。したがって、冷却装置を設けたり、冷却油の温度を測定したりすることなく、転がり軸受の温度を検出するように構成することも可能である。
さらに、上記実施形態では、転がり軸受に潤滑油を供給する潤滑装置を設けるとしているが、転がり軸受をグリス潤滑するのであれば、そのような潤滑装置を設ける必要はない。なお、この場合、潤滑油粘度とはグリスの粘度ということになる。
加えて、本発明は、工作機械以外の機械（たとえば発電機や圧延機等）にも適用することができる。 In the above embodiment, the temperature of the cooling oil flowing inside the rotating shaft is measured, and the temperature of the rolling bearing is detected (estimated) based on the measured value, but the temperature of the rolling bearing is important. As long as it can be detected. Therefore, it is also possible to configure to detect the temperature of the rolling bearing without providing a cooling device or measuring the temperature of the cooling oil.
Furthermore, in the above embodiment, a lubrication device that supplies lubricating oil to the rolling bearing is provided. However, if the rolling bearing is lubricated with grease, it is not necessary to provide such a lubrication device. In this case, the lubricating oil viscosity is the viscosity of the grease.
In addition, the present invention can also be applied to machines other than machine tools (for example, a generator, a rolling mill, etc.).

１・・主軸装置（回転軸装置）、２・・主軸（回転軸）、３・・転がり軸受、５・・温度センサ（温度検出手段）、６・・回転速度検出部（回転速度検出手段）、７・・制御装置、８・・演算装置、９・・記憶装置、１０・・表示装置（表示手段）、１１・・冷却油循環装置（冷却装置）、１２・・潤滑油供給装置（潤滑装置）、２０・・工作機械（回転軸を有する機械）。   1 .... Spindle device (rotary shaft device) 2 .... Spindle (rotary shaft) 3 .... Rolling bearing 5 .... Temperature sensor (temperature detection means) 6 .... Rotation speed detection unit (rotation speed detection means) , 7 .. Control device, 8 .. Arithmetic device, 9 .. Storage device, 10 .. Display device (display means), 11 .. Cooling oil circulation device (cooling device), 12. Device), 20 .. Machine tool (machine having a rotating shaft).

Claims (4)

回転軸を転がり軸受にて軸支した回転軸装置と、前記転がり軸受の温度を検出するための温度検出手段、前記回転軸の速度を検出するための回転速度検出手段、及び表示手段を有する制御装置とを備えた回転軸を有する機械であって、
前記制御装置は、前記転がり軸受の状態を診断するための情報として、前記転がり軸受の温度と、前記制御装置で算出する前記転がり軸受の転がり速度と、前記制御装置で算出する前記転がり軸受の摩擦トルクと、前記制御装置で算出する前記転がり軸受の摩擦係数と、前記制御装置で算出する前記転がり軸受の発熱量と、前記制御装置で算出する前記転がり軸受における潤滑油粘度と、前記制御装置で算出する前記転がり軸受の現在の予圧とのうちの少なくとも何れか１つを、数値及び／又はグラフにて前記表示手段に表示することを特徴とする工作機械。 A control having a rotating shaft device in which a rotating shaft is supported by a rolling bearing, temperature detecting means for detecting the temperature of the rolling bearing, rotating speed detecting means for detecting the speed of the rotating shaft, and display means. A machine having a rotating shaft with a device,
The control device, as information for diagnosing the state of the rolling bearing, the temperature of the rolling bearing, the rolling speed of the rolling bearing calculated by the control device, and the friction of the rolling bearing calculated by the control device. A torque, a friction coefficient of the rolling bearing calculated by the control device, a heat generation amount of the rolling bearing calculated by the control device, a lubricating oil viscosity in the rolling bearing calculated by the control device, and the control device. A machine tool, wherein at least one of the calculated current preloads of the rolling bearing is displayed on the display means as a numerical value and / or a graph. 前記制御装置は、前記摩擦係数と、前記潤滑油粘度と前記転がり速度との積を前記転がり軸受の現在の予圧で除した値との関係をグラフにて前記表示手段に表示することを特徴とする請求項１に記載の工作機械。   The control device displays the relationship between the friction coefficient and a value obtained by dividing the product of the lubricating oil viscosity and the rolling speed by the current preload of the rolling bearing on the display means in a graph. The machine tool according to claim 1. 前記制御装置は、前記摩擦係数と、前記潤滑油粘度と前記転がり速度との積を前記転がり軸受の現在の予圧で除した値との関係を表すグラフを記憶するとともに、
今回のグラフを表示するにあたり、過去のグラフと重ねて表示することを特徴とする請求項２に記載の工作機械。 The control device stores a graph representing a relationship between the friction coefficient and a value obtained by dividing a product of the lubricating oil viscosity and the rolling speed by a current preload of the rolling bearing;
3. The machine tool according to claim 2, wherein the current graph is displayed so as to overlap the past graph. 前記制御装置は、前記転がり軸受の状態を診断するための情報を記憶するとともに、今回の情報を前記表示手段に表示するにあたり、過去の情報と今回の情報との両方を表示することを特徴とする請求項１〜３の何れかに記載の工作機械。   The control device stores information for diagnosing the state of the rolling bearing, and displays both past information and current information when displaying the current information on the display means. The machine tool according to claim 1.
JP2016161408A 2016-08-19 2016-08-19 Machine with rotation axis Pending JP2018028865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016161408A JP2018028865A (en) 2016-08-19 2016-08-19 Machine with rotation axis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016161408A JP2018028865A (en) 2016-08-19 2016-08-19 Machine with rotation axis

Publications (1)

Publication Number Publication Date
JP2018028865A true JP2018028865A (en) 2018-02-22

Family

ID=61249110

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016161408A Pending JP2018028865A (en) 2016-08-19 2016-08-19 Machine with rotation axis

Country Status (1)

Country Link
JP (1) JP2018028865A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108981965A (en) * 2018-06-15 2018-12-11 河南中烟工业有限责任公司 A kind of air-conditioning draught fan vibrating shaft temperature checking method
CN109101000A (en) * 2018-09-27 2018-12-28 山东冠洲股份有限公司 Cold rolling production monitoring system and its monitoring method
JP2020140447A (en) * 2019-02-28 2020-09-03 ファナック株式会社 Information processing device and information processing method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108981965A (en) * 2018-06-15 2018-12-11 河南中烟工业有限责任公司 A kind of air-conditioning draught fan vibrating shaft temperature checking method
CN109101000A (en) * 2018-09-27 2018-12-28 山东冠洲股份有限公司 Cold rolling production monitoring system and its monitoring method
JP2020140447A (en) * 2019-02-28 2020-09-03 ファナック株式会社 Information processing device and information processing method
US11449035B2 (en) 2019-02-28 2022-09-20 Fanuc Corporation Information processing device and information processing method

Similar Documents

Publication Publication Date Title
TWI665435B (en) Bearing diagnostic device for machine tool
US10513001B2 (en) Bearing diagnostic device
JP6657256B2 (en) Fault diagnosis method and fault diagnosis device for feed axis
JP7000135B2 (en) Feed shaft abnormality diagnosis method and abnormality diagnosis device
JP6616964B2 (en) State display method and apparatus of rolling bearing in machine tool
JP6495797B2 (en) Spindle abnormality detection device and spindle abnormality detection method for machine tools
JP2018028865A (en) Machine with rotation axis
JP2018017689A (en) Abnormality determination method of feed shaft
US10286507B2 (en) Machine tool having function of diagnosing abnormality of speed reducer of tool changer
JP2009068950A (en) Machine diagnostic system
JP2019132773A (en) Diagnosis device of rotating shaft device
WO2019167180A1 (en) Abnormality type determining device and abnormality type determining method
JP2018028512A (en) Machine with rotating shaft
JPWO2016133100A1 (en) Abnormality diagnosis system
JP6726579B2 (en) Machine Tools
JP6799977B2 (en) Bearing abnormality diagnosis method in rotary shaft device and rotary shaft device
JP6845192B2 (en) Processing environment measuring device
JP5516839B2 (en) Spindle device abnormality detection device, spindle device abnormality detection method, spindle device, and machine tool
JP6603805B2 (en) Method for determining rigidity of power transmission system of machine
JP6742205B2 (en) Rotating shaft device and bearing abnormality diagnosis method in rotating shaft device
JP6637844B2 (en) Method for determining warm-up operation time before bearing diagnosis in machine tool, machine tool
JP2021085694A (en) Ball screw condition monitoring device and condition monitoring method
JP6881673B2 (en) Anomaly detection device and abnormality detection method
JP6873870B2 (en) Lubrication state diagnosis device and lubrication state diagnosis method for bearings in rotary shaft devices
JP2018028513A (en) Method of checking lubrication condition of bearing in rotary shaft device, and rotary shaft device

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160914

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190328

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20200330

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200407

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20201201