JPH04135139A - Lubrication system of bearing in machine tool - Google Patents
Lubrication system of bearing in machine toolInfo
- Publication number
- JPH04135139A JPH04135139A JP25308790A JP25308790A JPH04135139A JP H04135139 A JPH04135139 A JP H04135139A JP 25308790 A JP25308790 A JP 25308790A JP 25308790 A JP25308790 A JP 25308790A JP H04135139 A JPH04135139 A JP H04135139A
- Authority
- JP
- Japan
- Prior art keywords
- lubrication
- bearing
- oil
- rotation number
- flow rate
- 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
Links
- 238000005461 lubrication Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 239000010687 lubricating oil Substances 0.000 claims description 23
- 239000003921 oil Substances 0.000 description 20
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Turning (AREA)
- Auxiliary Devices For Machine Tools (AREA)
Abstract
Description
本発明は、工作機械における主軸等の軸受けに対して潤
滑油を供給、回収する、所謂ジェット潤滑装置の潤滑シ
ステムに関する。The present invention relates to a lubrication system for a so-called jet lubrication device that supplies and collects lubricating oil to a bearing such as a main shaft in a machine tool.
前記潤滑システムは、従来第４図示の如く、給油ポンプ
２によりオイルタンクｌ内の潤滑油を軸受け３へ圧送し
て軸受け３の潤滑を行うと共に、排油ポンプ４によって
軸受け３からオイルタンクｌへ返送する循環油圧回路を
設け、オイルタンク１内の潤滑油は、そのオイルタンク
１に接続されたオイルクーラ５により適宜冷却され一定
温度にコントロールされていた。
そしてその供給される潤滑油の量は、回転軸８ａの最高
回転数に対応する固定値に設定され、その流量は流量調
整弁６ａにより調整され、供給路に設けられた流量計ｌ
Ｏにより流量が確認できるようにもなっていた。In the conventional lubrication system, as shown in FIG. 4, an oil supply pump 2 pumps lubricating oil in an oil tank l to a bearing 3 to lubricate the bearing 3, and an oil drain pump 4 pumps lubricating oil from the bearing 3 to an oil tank l. A circulating hydraulic circuit was provided for returning the lubricating oil, and the lubricating oil in the oil tank 1 was appropriately cooled by an oil cooler 5 connected to the oil tank 1 and controlled to a constant temperature. The amount of lubricating oil supplied is set to a fixed value corresponding to the maximum rotational speed of the rotating shaft 8a, and the flow rate is adjusted by a flow rate regulating valve 6a, and a flow meter l provided in the supply path is set.
It was also possible to check the flow rate using O.
回転軸が定速回転するものであれば、潤滑油の供給量は
その回転数に適応する量に調整しておきさえすれば何も
問題はないが、回転速度が変化するものでは、上記潤滑
油の供給量が最大回転数時の必要量を基準に決定されて
いるので、回転軸の低回転時には、消費動力の無駄を招
き、それに伴なう利益は何もない。
即ち、潤滑油の供給量は、回転軸の温度上昇を許容範囲
内に押えることが最大の目的であり、供給量を増加する
ことにより、第２図に示す如く、全回転数に亘って温度
上昇防止効果も向上することは誰しもが知っていること
である。
従って最高回転時には、許容温度以下に押えるため大量
の潤滑油を必要とするが、低速回転時には、潤滑油の供
給が少量でも許容温度以下を維持できる０反面潤滑油の
供給量と消費動力との関係を見てみると、第３図の如く
、供給量の増加に伴って消費動力も増大することが実験
的に確認されており、してみると低速回転時に、必要以
上（許容温度以下を保つための最低量を超過した量）の
潤滑油を供給することは、かえって消費動力を無駄に浪
費することにしかならないし、潤滑油の劣化を速めるこ
とにも繋がるIf the rotating shaft rotates at a constant speed, there will be no problem as long as the amount of lubricant supplied is adjusted to match the rotation speed, but if the rotating speed changes, the above-mentioned lubrication Since the amount of oil supplied is determined based on the amount required at the maximum rotation speed, power consumption is wasted when the rotating shaft rotates at low speeds, and there is no profit associated with it. In other words, the main purpose of the supply amount of lubricating oil is to suppress the temperature rise of the rotating shaft within an allowable range. Everyone knows that it also improves the prevention effect. Therefore, at maximum rotation, a large amount of lubricating oil is required to keep the temperature below the allowable level, but at low speeds, even a small amount of lubricating oil supply can maintain the temperature below the allowable level.On the other hand, the amount of lubricating oil supplied and the power consumed are Looking at the relationship, as shown in Figure 3, it has been experimentally confirmed that as the supply amount increases, the power consumption also increases. Supplying lubricating oil in an amount that exceeds the minimum amount required to maintain the lubricating oil will only result in wasted power consumption, and will also lead to faster deterioration of the lubricating oil.
本発明は、主軸回転数が可変運転される工作機械に対し
、効率の良い潤滑システムを提供するもので、その構成
は、主軸の回転数に応じた量の潤滑油を供給するために
、工作機械の軸受けに対して潤滑油を供給、回収する油
圧回路と、その油圧回路に設けた流量調整機構と、前記
工作機械の主軸回転数を検出する回転数検出機構と、そ
の回転数検出機構により検出された回転数に応じて前記
流量調整機構を制御する流量制御手段とを含むことにあ
る。The present invention provides an efficient lubrication system for a machine tool that operates with a variable spindle rotation speed. A hydraulic circuit that supplies and recovers lubricating oil to the bearings of the machine, a flow rate adjustment mechanism provided in the hydraulic circuit, a rotation speed detection mechanism that detects the rotation speed of the main shaft of the machine tool, and the rotation speed detection mechanism. and a flow rate control means for controlling the flow rate adjustment mechanism according to the detected rotational speed.
回転数検出機構によって検出された回転数に応じ、流量
調整機構が流量制御手段によってその回転数に適した所
定の供給量に制御され、軸受けに対して最適な量の潤滑
油を供給する。According to the rotation speed detected by the rotation speed detection mechanism, the flow rate adjustment mechanism is controlled by the flow control means to a predetermined supply amount suitable for the rotation speed, thereby supplying an optimal amount of lubricating oil to the bearing.
以下本発明に係る実施例を図面に従って説明する。
第１図は、本発明に係る軸受けの潤滑システムの油圧回
路を示したもので、オイルタンクｌ内の潤滑油は、給油
ポンプ２によりノズルを介して軸受け３に供給され、そ
の軸受け３からは、排油ポンプ４によりオイルタンク１
へ戻され、オイルタンク１内の潤滑油は適宜オイルクー
ラ５により冷却されるといった従来と同様の循環油圧回
路が構成されている。給油ポンプ２と軸受け３とを接続
する管路には、流量調整機構である比例電磁式流量調整
弁６が設けられ、供給量が可変的に調整される。この比
例電磁式流量調整弁６は、流量制御手段である数値制御
装置７に接続され、主軸８に取り付けられている回転数
検出機構９により検出された回転数に応じて制御される
。数値制御装置７には、予め主軸８の回転数に応じた潤
滑油の最適な量のデータがインプットされており、比例
電磁式流量調整弁６は、その最適量の信号が伝達される
と、管路な通過する潤滑油の量をその信号に従って作動
する。又管路の途中には流量計１０が設けられており、
供給油量の確認もできる。
本実施例では、流量調整機構として比例電磁式流量調整
弁を採用したが、サーボモータにより駆動される機械的
装置であってもよい。
又本システムは、主軸以外の回転軸に採用しても差し支
えない。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a hydraulic circuit of a bearing lubrication system according to the present invention. Lubricating oil in an oil tank 1 is supplied to a bearing 3 through a nozzle by an oil supply pump 2, and from the bearing 3, , the oil tank 1 is removed by the oil drain pump 4.
The lubricating oil in the oil tank 1 is returned to the lubricating oil tank 1, and is appropriately cooled by an oil cooler 5, thereby forming a circulating hydraulic circuit similar to the conventional one. A proportional electromagnetic flow rate adjustment valve 6, which is a flow rate adjustment mechanism, is provided in the pipeline connecting the oil supply pump 2 and the bearing 3, and the supply amount is variably adjusted. This proportional electromagnetic flow rate adjustment valve 6 is connected to a numerical control device 7 that is a flow rate control means, and is controlled according to the rotation speed detected by a rotation speed detection mechanism 9 attached to the main shaft 8. Data on the optimal amount of lubricating oil according to the rotational speed of the main shaft 8 is input into the numerical control device 7 in advance, and when the proportional electromagnetic flow control valve 6 receives the signal of the optimal amount, The amount of lubricating oil passing through the pipe is controlled according to the signal. In addition, a flow meter 10 is installed in the middle of the pipe,
You can also check the amount of oil supplied. In this embodiment, a proportional electromagnetic flow rate adjustment valve is used as the flow rate adjustment mechanism, but a mechanical device driven by a servo motor may also be used. Furthermore, this system may be applied to rotating shafts other than the main shaft.
以上のように構成した軸受けの潤滑システムによれば、
回転軸の回転数に最適の潤滑油を供給することが可能と
なり、回転軸の消費動力の節約するばかりでなく、潤滑
油の劣化に伴う補充、交換時期を伸ばすことができるの
で、回転数が可変の工作機械における潤滑の効率アップ
になる。According to the bearing lubrication system configured as above,
It is possible to supply lubricating oil that is optimal for the rotational speed of the rotating shaft, which not only saves power consumption of the rotating shaft, but also extends the period of replenishment and replacement due to deterioration of the lubricating oil, which reduces the rotational speed. This increases the efficiency of lubrication in variable machine tools.
図面は本発明の軸受けの潤滑装置を示したもので、第１
図は潤滑システムの説明図、第２図は主軸の回転数と軸
受けの温度上昇との関係を示すグラフ、第３図は主軸の
回転数と主軸の消費動力との関係を示すグラフ、第４図
は従来技術の説明図である。
ｌ・・オイルタンク、２・・給油ポンプ、３・・軸受け
、４・・排油ポンプ、５・・オイルクーラ、６・・比例
電磁式流量調整弁、６ａ・・流量調整弁、７・・数値制
御装置、８．８ａ・・主軸、９・・回転数検出機構、１
０・・流置針。
代
理
人The drawing shows the bearing lubrication device of the present invention.
The figure is an explanatory diagram of the lubrication system. Figure 2 is a graph showing the relationship between the rotation speed of the main shaft and the temperature rise of the bearing. Figure 3 is a graph showing the relationship between the rotation speed of the main shaft and the power consumption of the main shaft. The figure is an explanatory diagram of the prior art. l... Oil tank, 2... Oil supply pump, 3... Bearing, 4... Oil drain pump, 5... Oil cooler, 6... Proportional electromagnetic flow rate adjustment valve, 6a... Flow rate adjustment valve, 7... Numerical control device, 8.8a...Main shaft, 9...Rotation speed detection mechanism, 1
0: Placement needle. agent
Claims (1)
回路と、その油圧回路に設けた流量調整機構と、前記工
作機械の主軸回転数を検出する回転数検出機構と、その
回転数検出機構により検出された回転数に応じて前記流
量調整機構を制御する流量制御手段とを含む工作機械に
おける軸受けの潤滑システム。A hydraulic circuit that supplies and recovers lubricating oil to the bearings of a machine tool, a flow rate adjustment mechanism provided in the hydraulic circuit, a rotation speed detection mechanism that detects the rotation speed of the main shaft of the machine tool, and the rotation speed detection mechanism. A lubrication system for a bearing in a machine tool, the system comprising a flow rate control means for controlling the flow rate adjustment mechanism according to a rotational speed detected by the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25308790A JPH04135139A (en) | 1990-09-21 | 1990-09-21 | Lubrication system of bearing in machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25308790A JPH04135139A (en) | 1990-09-21 | 1990-09-21 | Lubrication system of bearing in machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04135139A true JPH04135139A (en) | 1992-05-08 |
Family
ID=17246312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25308790A Pending JPH04135139A (en) | 1990-09-21 | 1990-09-21 | Lubrication system of bearing in machine tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04135139A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004353868A (en) * | 2004-07-14 | 2004-12-16 | I M N Kk | Lubricant supplying method in rotation part support |
| JP2006022916A (en) * | 2004-07-09 | 2006-01-26 | Toray Ind Inc | Automatic oil feeding device and its method in drawing machine |
| JP2009127676A (en) * | 2007-11-20 | 2009-06-11 | Okuma Corp | Bearing lubricating device and its operation checking method |
-
1990
- 1990-09-21 JP JP25308790A patent/JPH04135139A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006022916A (en) * | 2004-07-09 | 2006-01-26 | Toray Ind Inc | Automatic oil feeding device and its method in drawing machine |
| JP2004353868A (en) * | 2004-07-14 | 2004-12-16 | I M N Kk | Lubricant supplying method in rotation part support |
| JP4683870B2 (en) * | 2004-07-14 | 2011-05-18 | アイ・エム・エヌ株式会社 | Lubricating oil supply method for rotating part support |
| JP2009127676A (en) * | 2007-11-20 | 2009-06-11 | Okuma Corp | Bearing lubricating device and its operation checking method |
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