JPH0641796Y2 - Spindle unit - Google Patents
Spindle unitInfo
- Publication number
- JPH0641796Y2 JPH0641796Y2 JP1988079454U JP7945488U JPH0641796Y2 JP H0641796 Y2 JPH0641796 Y2 JP H0641796Y2 JP 1988079454 U JP1988079454 U JP 1988079454U JP 7945488 U JP7945488 U JP 7945488U JP H0641796 Y2 JPH0641796 Y2 JP H0641796Y2
- Authority
- JP
- Japan
- Prior art keywords
- cooling fluid
- spindle
- speed
- temperature
- cooling
- 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.)
- Expired - Lifetime
Links
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案はスピンドルユニット、特にスピンドルユニット
のハウジングに冷却機構を備えたスピンドルユニットに
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a spindle unit, and more particularly to a spindle unit having a cooling mechanism in a housing of the spindle unit.
［従来の技術］ 工作機械用スピンドル装置は、運転中に主として軸受部
での発熱によって軸受および主軸の温度が上昇し、その
結果生ずる熱膨張のため軸受にかかる予圧が増大し、つ
いには焼き付きを起こすことがある。この様な状態を回
避するためハウジングと軸受との間にスリーブ（外筒）
を嵌挿し、ハウジングとスリーブとの接触面に冷却流体
流路を設け、その冷却流体流路に冷却流体を通すことに
ょって軸受を冷却する技術が開示されている。（例え
ば、実開昭61-7623号公報） ［考案が解決しようとする課題］ 上記従来の技術に基いた冷却流体の供給装置は、通常、
機械の運転条件や機械の周囲温度に関係なく常に一定温
度の冷却流体を供給するものであった。[Prior Art] In the spindle device for machine tools, the temperature of the bearing and the main shaft rises mainly due to the heat generated in the bearing during operation, and the resulting thermal expansion increases the preload applied to the bearing, eventually causing seizure. It may happen. In order to avoid such a condition, a sleeve (outer cylinder) is placed between the housing and the bearing.
There is disclosed a technique in which a bearing is cooled by inserting and inserting a cooling fluid passage in the contact surface between the housing and the sleeve, and passing the cooling fluid through the cooling fluid passage. (For example, Japanese Utility Model Laid-Open No. 61-7623) [Problems to be Solved by the Invention] A cooling fluid supply device based on the above-mentioned conventional technique is usually
The cooling fluid is always supplied at a constant temperature regardless of the operating conditions of the machine and the ambient temperature of the machine.
一般にスピンドル装置は高速回転状態では軸受予圧の過
大化を防止するため上記冷却流体の温度を高めに（例え
ば周囲温度より５°Ｃ高め）にすることが望ましいが、
この状態のまま低速回転で使用すると軸受外輪とスリー
ブとの間のはめあいすきまが大きくなり、軸受けの剛性
および減衰能が低下し、低速回転での重切削に適さな
い。低速回転では上記冷却流体の温度を機械周囲温度と
ほぼ等しくする必要があるが、この場合は高速回転に不
適であるという課題があった。Generally, in the spindle device, it is desirable to increase the temperature of the cooling fluid (for example, 5 ° C. higher than the ambient temperature) in order to prevent the bearing preload from becoming excessive in a high-speed rotation state.
If it is used at low speed rotation in this state, the fitting clearance between the outer ring of the bearing and the sleeve becomes large, and the rigidity and damping capacity of the bearing decrease, making it unsuitable for heavy cutting at low speed rotation. In the low speed rotation, the temperature of the cooling fluid needs to be almost equal to the ambient temperature of the machine, but in this case, there is a problem that it is not suitable for the high speed rotation.
本考案は上記課題を解決し、高速回転時は高速回転に適
した冷却流体温度、低速回転時は低速回転に適した冷却
流体温度を使用するスピンドルユニットを提供すること
を目的とする。An object of the present invention is to solve the above problems and to provide a spindle unit that uses a cooling fluid temperature suitable for high speed rotation during high speed rotation and a cooling fluid temperature suitable for low speed rotation during low speed rotation.
［課題を解決するための手段］ 上記目的を達成するため本考案は、ハウジングと、該ハ
ウジングに軸受を介して支承された主軸と、前記ハウジ
ングに設けられた冷却流体流路と、該冷却流体流路に冷
却流体を供給する冷却流体供給装置と、前記主軸の回転
数を検出する主軸速度センサとを備えたスピンドルユニ
ットにおいて、前記冷却流体供給装置には前記冷却流体
を冷却する冷却装置および前記冷却流体を加熱する加熱
装置が設けられ、前記主軸速度センサにより検出した主
軸回転数があらかじめ設定された高速域主軸回転数下限
値以下であれば冷却流体の温度を周囲温度と同じ温度
に、前記主軸回転数が前記高速域主軸回転数下限値以上
であれば冷却流体の温度を周囲温度より高い所定温度に
制御すべく前記冷却装置または加熱装置の入切を制御す
る制御装置を備える構成としたのである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a housing, a main shaft supported by a bearing in the housing, a cooling fluid passage provided in the housing, and the cooling fluid. In a spindle unit including a cooling fluid supply device that supplies a cooling fluid to a flow path and a spindle speed sensor that detects a rotation speed of the spindle, the cooling fluid supply device includes a cooling device that cools the cooling fluid, and A heating device for heating the cooling fluid is provided, and if the spindle speed detected by the spindle speed sensor is equal to or lower than a preset high-speed range spindle speed lower limit value, the temperature of the cooling fluid is the same as the ambient temperature, If the spindle speed is equal to or higher than the lower limit value of the spindle speed in the high speed range, the cooling device or the heating device is turned on to control the temperature of the cooling fluid to a predetermined temperature higher than the ambient temperature. The control device for controlling the cutting is provided.
［作用］ 主軸が高速回転する場合は冷却流体温度が主軸周囲温度
より高めに制御され、軸受予圧の過大化が防止される。
その結果軸受の焼付きが防止できる。[Operation] When the spindle rotates at a high speed, the temperature of the cooling fluid is controlled to be higher than the ambient temperature of the spindle, and the bearing preload is prevented from becoming excessive.
As a result, seizure of the bearing can be prevented.
また、上記主軸が低速回転する場合は冷却流体温度が周
囲温度とほぼ等しく制御され、軸受と外筒との間のすき
まの増大が防止される。このため低速回転時に軸受の剛
性低下を生ずることなく重切削にも耐え得る。このよう
に主軸回転数に合わせて冷却流体温度を制御することに
よりスピンドルを有効に利用できる。Further, when the main shaft rotates at a low speed, the temperature of the cooling fluid is controlled to be substantially equal to the ambient temperature, and an increase in the clearance between the bearing and the outer cylinder is prevented. Therefore, it is possible to withstand heavy cutting without lowering the rigidity of the bearing during low speed rotation. In this way, the spindle can be effectively used by controlling the temperature of the cooling fluid in accordance with the spindle speed.
［実施例］ 第１図に基いて本考案の実施例を説明する。ハウジング
１の内面には外筒２が嵌合している。外筒２の外周面で
ハウジング１との嵌合面には螺旋状の冷却流体流路３が
設けられ、冷却流体流路３の両端はそれぞれハウジング
１の外面に設けた流体供給孔４および流体排出孔５に連
通している。[Embodiment] An embodiment of the present invention will be described with reference to FIG. An outer cylinder 2 is fitted on the inner surface of the housing 1. A spiral cooling fluid flow path 3 is provided on the outer peripheral surface of the outer cylinder 2 on the fitting surface with the housing 1, and both ends of the cooling fluid flow path 3 are respectively a fluid supply hole 4 and a fluid supply hole provided on the outer surface of the housing 1. It communicates with the discharge hole 5.
主軸６は軸受７を介して両端部を外筒２に支承されてい
る。冷却流体供給手段８は冷却流体を貯留する槽および
その槽から冷却流体をハウジング１の流体供給孔４をを
へて外筒２の冷却流体流路３に送り込むポンプＰを備え
ており、ハウジング１の流体排出孔５から排出された冷
却流体は冷却流体供給手段８に回収されるようになって
いる。冷却流体供給手段８の冷却流体貯留槽には加熱装
置９、冷却装置10および流体温度を検出する温度センサ
11が配設されており、温度センサ11の信号は制御手段12
に入力される。Both ends of the main shaft 6 are supported by the outer cylinder 2 via bearings 7. The cooling fluid supply means 8 includes a tank for storing the cooling fluid and a pump P for sending the cooling fluid from the tank to the cooling fluid flow path 3 of the outer cylinder 2 through the fluid supply hole 4 of the housing 1. The cooling fluid discharged from the fluid discharge hole 5 is collected by the cooling fluid supply means 8. The cooling fluid reservoir of the cooling fluid supply means 8 has a heating device 9, a cooling device 10 and a temperature sensor for detecting the fluid temperature.
11 is provided, and the signal of the temperature sensor 11 is the control means 12
Entered in.
主軸６の近傍には主軸６の回転数を検出する速度センサ
13および主軸周囲温度を検出する温度センサ14を配設
し、それぞれの信号は制御手段12に入力される。A speed sensor for detecting the rotation speed of the spindle 6 is provided near the spindle 6.
A temperature sensor 14 for detecting the temperature around the spindle 13 and a temperature sensor 14 for detecting the temperature around the spindle are provided, and respective signals are input to the control means 12.
制御手段12は速度センサ13から入力された信号によって
主軸回転数Ｎを算定し、その回転数Ｎがあらかじめ設定
された高速域主軸回転数下限値N1より大きいかどうかを
判定する。また温度センサ11および温度センサ14から制
御手段12に入力される信号は制御手段内でそれぞれ冷却
流体温度T0および主軸周囲温度Trに変換される。The control means 12 calculates the spindle rotation speed N from the signal input from the speed sensor 13 and determines whether or not the rotation speed N is larger than a preset high speed range spindle rotation speed lower limit value N 1 . Further, the signals input from the temperature sensor 11 and the temperature sensor 14 to the control means 12 are converted into the cooling fluid temperature T 0 and the spindle ambient temperature T r in the control means, respectively.
第２図は冷却流体温度の制御の一例を示している。主軸
回転数Ｎが高速域主軸回転数下限値N1より小さい場合は
冷却流体温度T0と主軸周囲温度Trとの差（T0−Tr）が０
になるように制御し、主軸回転数Ｎが高速域主軸回転数
下限値N1より大きい場合には冷却流体温度T0と主軸周囲
温度Trとの差（T0−Tr）が5degになるように制御する。
制御の手段として加熱装置９または冷却装置10を入切す
ることによって行う。FIG. 2 shows an example of control of the cooling fluid temperature. When the spindle rotation speed N is high speed range spindle rotation speed limit value N 1 is smaller than the difference between the cooling fluid temperature T 0 and the main shaft ambient temperature T r (T 0 -T r) is 0
When the spindle speed N is higher than the high-speed range spindle speed lower limit value N 1 , the difference (T 0 −T r ) between the cooling fluid temperature T 0 and the spindle ambient temperature T r becomes 5 deg. Control to be.
It is performed by turning on or off the heating device 9 or the cooling device 10 as a control means.
Ｎ＜N1（低速回転）の場合、T0＞TrならばT0を下げるた
めに冷却装置10を作動させる指令が制御手段12から発せ
られ、T0＜TrならばT0を上げるために加熱装置９を作動
させる指令が制御手段12から発せられる。In the case of N <N 1 (low speed rotation), if T 0 > T r , the control means 12 issues a command to operate the cooling device 10 to lower T 0, and if T 0 <T r , raises T 0 . In order to activate the heating device 9, a command is issued from the control means 12.
Ｎ＞N1（高速回転）の場合、T0＞Tr＋５ならば冷却装置
10が作動し、T0＜Tr＋５ならば加熱装置９が作動するよ
うに制御される。When N> N 1 (high speed rotation), if T 0 > T r +5, cooling device
10 is activated, and if T 0 <T r +5, the heating device 9 is controlled to be activated.
なお、上記実施例では主軸回転数を高速、低速の２領域
に設定しているが、速度域および温度域を多段に設定す
ることもできる。Although the spindle speed is set to two regions of high speed and low speed in the above embodiment, the speed range and the temperature range can be set in multiple stages.
［考案の効果］ 以上述べたように本考案は、主軸回転数の合わせて冷却
流体温度を制御することにより、主軸の低速回転時には
軸受の剛性低下を生ずることがなく重切削に耐え得、主
軸の高速回転時には軸受予圧の過大化が防止され、その
結果軸受の焼付きが防止できるスピンドルユニットを得
ることができるという効果を奏する。[Effects of the Invention] As described above, the present invention can withstand heavy cutting without lowering the rigidity of the bearing when the spindle rotates at a low speed by controlling the cooling fluid temperature in accordance with the spindle rotation speed. It is possible to obtain the spindle unit capable of preventing the bearing preload from being excessively increased at the time of high speed rotation, and as a result, preventing the seizure of the bearing.
第１図は本考案のスピンドル装置の主要部の断面図およ
び冷却流体の制御系統図であり、第２図は本考案のスピ
ンドル装置の制御の一例をグラフで示した図である。 ［主要部分の符号の説明］ 1:ハウジング、2:外筒 3:冷却流体流路、6:主軸 8:冷却流体供給手段、9:加熱装置 10:冷却装置、11、14:温度センサ 12:制御手段、13:速度センサFIG. 1 is a sectional view of a main part of a spindle device of the present invention and a control system diagram of a cooling fluid, and FIG. 2 is a graph showing an example of control of the spindle device of the present invention. [Description of symbols of main parts] 1: Housing, 2: Outer cylinder 3: Cooling fluid flow path, 6: Main shaft 8: Cooling fluid supplying means, 9: Heating device 10: Cooling device, 11, 14: Temperature sensor 12: Control means, 13: speed sensor
Claims (1)
て支承された主軸と、前記ハウジングに設けられた冷却
流体流路と、該冷却流体流路に冷却流体を供給する冷却
流体供給装置と、前記主軸の回転数を検出する主軸速度
センサとを備えたスピンドルユニットにおいて、前記冷
却流体供給装置には前記冷却流体を冷却する冷却装置お
よび前記冷却流体を加熱する加熱装置が設けられ、前記
主軸速度センサにより検出した主軸回転数があらかじめ
設定された高速域主軸回転数下限値以下であれば冷却流
体の温度を周囲温度と同じ温度に、前記主軸回転数が前
記高速域主軸回転数下限値以上であれば冷却流体の温度
を周囲温度より高い所定温度に制御すべく前記冷却装置
または加熱装置の入切を制御する制御装置を備えたこと
を特徴とするスピンドルユニット。1. A housing, a main shaft supported by a bearing in the housing, a cooling fluid passage provided in the housing, and a cooling fluid supply device for supplying a cooling fluid to the cooling fluid passage. In a spindle unit including a spindle speed sensor that detects the rotation speed of the spindle, the cooling fluid supply device is provided with a cooling device that cools the cooling fluid and a heating device that heats the cooling fluid, and the spindle speed. If the spindle speed detected by the sensor is less than or equal to the preset high-speed range spindle rotation speed lower limit value, the temperature of the cooling fluid is kept at the same temperature as the ambient temperature, and the spindle speed is above the high-speed range spindle rotation speed lower limit value. If there is any, it is provided with a controller for controlling the on / off of the cooling device or the heating device so as to control the temperature of the cooling fluid to a predetermined temperature higher than the ambient temperature. Dollar unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988079454U JPH0641796Y2 (en) | 1988-06-17 | 1988-06-17 | Spindle unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988079454U JPH0641796Y2 (en) | 1988-06-17 | 1988-06-17 | Spindle unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH024741U JPH024741U (en) | 1990-01-12 |
| JPH0641796Y2 true JPH0641796Y2 (en) | 1994-11-02 |
Family
ID=31304332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988079454U Expired - Lifetime JPH0641796Y2 (en) | 1988-06-17 | 1988-06-17 | Spindle unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0641796Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03272715A (en) * | 1990-03-20 | 1991-12-04 | Matsushita Electric Ind Co Ltd | Cooking utensil with steam process function |
| JP2011167799A (en) * | 2010-02-18 | 2011-09-01 | Ntn Corp | Main spindle device |
| JP6444717B2 (en) * | 2014-12-12 | 2018-12-26 | Ｔｏｗａ株式会社 | Cutting apparatus and cutting method |
| CN107953261A (en) * | 2017-12-26 | 2018-04-24 | 华辰精密装备（昆山）股份有限公司 | High-speed grinding roll grinder main shaft temperature control system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60167745A (en) * | 1984-02-08 | 1985-08-31 | Mitsubishi Heavy Ind Ltd | Temperature controller for spindle head of machine tool |
| JPH0620642B2 (en) * | 1984-11-15 | 1994-03-23 | 光洋精工株式会社 | Rolling bearing device for machine tool spindle |
| JPS6244351A (en) * | 1985-08-23 | 1987-02-26 | Hitachi Ltd | Spindle cooling controller for machine tool |
-
1988
- 1988-06-17 JP JP1988079454U patent/JPH0641796Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH024741U (en) | 1990-01-12 |
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