JP2004114181A - Defoaming agent supplying device - Google Patents

Defoaming agent supplying device Download PDF

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Publication number
JP2004114181A
JP2004114181A JP2002277855A JP2002277855A JP2004114181A JP 2004114181 A JP2004114181 A JP 2004114181A JP 2002277855 A JP2002277855 A JP 2002277855A JP 2002277855 A JP2002277855 A JP 2002277855A JP 2004114181 A JP2004114181 A JP 2004114181A
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JP
Japan
Prior art keywords
cutting fluid
defoaming agent
tank
fluid tank
foam
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
JP2002277855A
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Japanese (ja)
Inventor
Kenji Yamada
山田 賢治
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 JP2002277855A priority Critical patent/JP2004114181A/en
Publication of JP2004114181A publication Critical patent/JP2004114181A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a defoaming agent supplying device which eliminates foams by monitoring a generation state of foams, and supplying defoaming a proper quantity of agent at a proper time, prevents foams from overflowing from a cutting fluid tank, and also prevents generation of a machining defective of a machine tool by a cutting fluid discharge defect due to lowering of a fluid level of the cutting fluid tank. <P>SOLUTION: This device supplies the defoaming agent 4 to the cutting fluid tank 3 for storing the cutting fluid 2 to be supplied to the machine tool. The device is constituted of a defoaming agent tank 5 for storing the fluid defoaming agent 4, a pump 6 for supplying the defoaming agent 4 from the defoaming agent tank 5 to the cutting fluid tank 3 via a tube 9 and a foam detection means 7 for detecting a defoaming surface of the cutting fluid tank 3. When the foam detection means 7 detects more than prescribed quantity of foams 8, the pump 6 is driven to supply the defoaming agent 4 to the cutting fluid tank 3. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、工作機械の切削液タンクに消泡剤を供給する消泡剤供給装置に関する。
【0002】
【従来の技術】
切削機や研削機、旋盤等の工作機械に使用されている切削液には、種類によっては泡立ちするものがあり、例えば加工条件を変更したり、工作機械を無人で運転して発見が遅れたりして、この泡立ち量が多くなった時には、切削液タンクから溢れて工場の床面へ流れ出し、やがて泡が液体へ変化することにより床面が切削液で濡れてしまい工場が水浸しになってしまうことがある。また、切削液タンクから発泡した切削液が流出することにより切削液タンクの液面が低下し、切削液を吸い上げ工作機械へ吐出するポンプが吸い込み口から空気を吸い込み、工作機械への吐出が不十分になり、加工不良を生じたりすることがある。
この発泡を消すためにさまざまな試みがされている。切削液にいろいろな添加剤を加えても、切削液としての能力の関係から、発泡しない切削液単体を作成することは現状、困難となっている。
また、半固体状や液状の消泡剤を切削液に投入することにより、発泡量を減少できるので、作業員が発泡量を見ながら消泡剤を切削液タンクに投入する。また、切削液タンクの上方蓋の下面に消泡剤を設け、その消泡剤に、上昇してきた発泡が接触して消滅し、一定高さ以上には発泡量を増やさない切削液タンク装置がある。(例えば、特許文献1参照)
更に、発泡を物理的に消失又は圧縮させる切削液タンク装置がある。(例えば、特許文献2参照)
【0003】
【特許文献1】
特開2002−059337号公報
【特許文献2】
特開平11−129139号公報
【0004】
【発明が解決しようとする課題】
しかし、消泡剤の効果は約1〜3時間といった短時間しか持続できない場合が多く、夜間などに工作機械を運転する場合には、切削液タンクの発泡の有無を作業員が見回ったり、一旦消泡剤を投入したら消泡の効果が薄れる頃を見計らって再び消泡剤を投入するために作業員が戻ってこなければならなかった。また、特許文献1のような切削液タンク装置にあっても、取り付けられた消泡剤の補給などをする必要が考えられる。更に、物理的に発泡を消失させる装置は装置として大がかりな場合も多く実用的でない面もある。
【0005】
【課題を解決するための手段】
そこで、本発明は上記課題を鑑み、泡の発生状態を監視し、消泡剤を適時に適量供給することにより泡を消失させ、切削液タンクから泡が溢れ出すことを防止し、切削液タンクの液面低下による切削液吐出不良によって工作機械の加工不良が生じることを防止できる消泡剤供給装置を提供することを目的とする。
つまり、請求項1に係る本発明の構成は、工作機械の切削液タンクに消泡剤を供給する装置であって、
消泡剤を貯蔵する消泡剤タンクと、消泡剤タンクから消泡剤を切削液タンクへ移動させる移動手段と、切削液タンクの発泡面を検出する泡検知手段とからなり、泡検知手段が所定量以上の泡を検知したときに移動手段を駆動して消泡剤を切削液タンクに移動させることを特徴とする消泡剤供給装置である。
これにより、泡検知手段が所定量以上の泡を検知したときに移動手段を駆動して消泡剤を切削液タンクに移動させるので、泡が所定量以上発生するたびに消泡を行い、無人であっても切削液タンクから切削液の発泡が溢れ出して工場内の床面を汚したり、切削液タンクの液面低下による切削液吐出不良によって工作機械の加工不良が生じたりすることがない。
【0006】
ここで、消泡剤には液体状と固体状とがあり、消泡剤タンクから消泡剤を切削液タンクへ移動させる移動手段は、液状の場合、消泡剤タンクから液状消泡剤を汲み上げ切削液タンクに吐出するポンプとなる。なお、消泡剤タンクは、切削液タンクの近傍に設置すれば、ポンプによる送出距離が短くなるので送出管を短くしたり、ポンプ機能を小さくすることができる。
一方、固体状消泡剤の場合の移動手段は、消泡剤タンクを切削液タンクの上方へ位置させ、消泡剤タンクの下面に固体状消泡剤を落下させる開閉口を設け、開閉口から落下する固定状消泡剤を切削液タンクの液面に落下させて投入することが好ましい。また、消泡剤が固体状であってもゲル状又は粘性の高い性状である場合は、消泡剤タンクからゲル状等消泡剤を適量掻き出すフォーク形状の取り出し部材を設け、その取り出し部材を切削液タンクの切削液内へ移動させ、攪拌させることで切削液に溶解させるように設けることが好ましい。
また、泡検知手段は、切削液タンク内に設けられて発泡面に接触するものだけでなく、切削液タンクの外に泡検知手段を配置し、発泡面に赤外線等を照射して発泡液高さを計測したり、かなり平滑な液面と気泡が不規則に列ぶ発泡面との差異を撮影映像から画像処理して発泡面高さを計測したりすることも可能である。また、消泡剤タンクから消泡剤を切削液タンクへ移動させる移動手段は、移動させる消泡剤を常に定量とするだけでなく、移動時間間隔を時間測定部材により記録し、移動時間間隔が所定時間より短くなったときは、発泡原因が増加又は強化していると制御部で判断して消泡剤の移動量を増加させたりすることは可能である。
【0007】
【発明の実施の形態】
本発明に係る消泡剤供給装置を図面に基づき説明する。
図1は、本発明に係る消泡剤供給装置を示す概略図である。
消泡剤供給装置1は、図示しない工作機械へポンプなどで切削液2を供給する切削液タンク3に消泡剤4を供給する装置であり、液状の消泡剤4を貯蔵する消泡剤タンク5と、消泡剤タンク5から消泡剤4を切削液タンク3へチューブ9を介して供給するポンプ6と、切削液タンク3の発泡面を検出する泡検知手段7とで構成されている。そして、泡検知手段7が所定量以上の泡8を検知したときにポンプ6を駆動して消泡剤4を切削液タンク3に供給する。
切削液タンク3の開口部を覆う蓋部材31には、工作機械から還流してきた切削液2を切削液タンク3へ流入させる開口部が設けられ、その開口部の近くには消泡剤4を吐出するチューブ9の先端が取り付けられている。還流した切削液に含まれていた発泡や切削液が液面に落下し発泡して泡が集まりやすいからで、これにより吐出される消泡剤4が大量の泡に直接に噴射されることになる。
また、71は検出方向が発泡面に向けられて蓋部材31に取り付けられた検出センサであり、上下動する発泡面に浮上する材質のフロート72の高さを測定することで発泡面の検出を行う。フロート72はガイド部材73を挿通して検出センサ71の検知範囲から外れないように案内されている。ガイド部材73は蓋部材31から下向きに突出され、先端にはフロート72が落下しないように抜け止め74が取り付けられている。
【0008】
以上のように構成された消泡剤供給装置の作用を説明する。
図示しない工作機械へポンプなどで供給する切削液2は還流されて、蓋部材31の開口部から切削液タンク3へ流入され、還流した切削液に含まれていた発泡や切削液が液面に落下して発泡し、泡8が切削液2の上に浮遊している。泡8の上面にはフロート72が浮上しており、泡8の発泡面が上下動するのに合わせてガイド部材73に沿って上下動する。
フロート72は、検出センサ72が常に高さを測定しており、所定高さ以上になった場合には、切削液タンク3の底面積とにより所定量以上の泡が生じていると判断できるので、消泡剤供給装置1のポンプ6を駆動して消泡剤タンク5から消泡剤4を吸い上げてチューブ9の先端から切削液タンク3の泡8に消泡剤4を吐出して泡8を消失させる。
【0009】
【発明の効果】
本発明の消泡剤供給装置によれば、泡検知手段が所定量以上の泡を検知したときに移動手段を駆動して消泡剤を切削液タンクに移動させるので、泡が所定量以上発生するたびに消泡を行い、無人であっても切削液タンクから切削液の発泡が溢れ出して工場内の床面を汚したり、切削液タンクの液面低下による切削液吐出不良によって工作機械の加工不良が生じたりすることがない。
【図面の簡単な説明】
【図1】本発明の消泡剤供給装置の構成を示す説明図である。
【符号の説明】
1・・消泡剤供給装置、2・・切削液、3・・切削液タンク、4・・消泡剤、5・・消泡剤タンク、6・・ポンプ、7・・泡検知手段、8・・泡、9・・チューブ、31・・蓋部材、71・・検出センサ、72・・フロート、73・・ガイド部材、74・・抜け止め。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an antifoaming agent supply device for supplying an antifoaming agent to a cutting fluid tank of a machine tool.
[0002]
[Prior art]
Some cutting fluids used in machine tools such as cutting machines, grinders, lathes, etc. are foamy depending on the type.For example, changing the processing conditions or running the machine tool unattended may delay discovery. Then, when the amount of foaming increases, it overflows from the cutting fluid tank and flows to the floor of the factory, and eventually the foam changes to liquid, so that the floor is wet with the cutting fluid and the factory is flooded. Sometimes. In addition, the fluid level of the cutting fluid tank drops due to the flow of the foamed cutting fluid from the cutting fluid tank, and the pump that sucks up the cutting fluid and discharges it to the machine tool sucks air from the suction port, preventing discharge to the machine tool. In some cases, it may be insufficient and processing defects may occur.
Various attempts have been made to eliminate this foaming. Even if various additives are added to the cutting fluid, it is presently difficult to prepare a cutting fluid alone that does not foam due to its ability as a cutting fluid.
In addition, since the amount of foaming can be reduced by adding a semi-solid or liquid defoaming agent to the cutting fluid, the worker inputs the defoaming agent into the cutting fluid tank while watching the foaming amount. Also, a defoaming agent is provided on the lower surface of the upper lid of the cutting fluid tank, and the rising foam comes into contact with the defoaming agent and disappears, and a cutting fluid tank device that does not increase the foaming amount beyond a certain height is provided. is there. (For example, see Patent Document 1)
Further, there is a cutting fluid tank device for physically eliminating or compressing the foam. (For example, see Patent Document 2)
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-059337 [Patent Document 2]
JP-A-11-129139
[Problems to be solved by the invention]
However, in many cases, the effect of the defoamer can be maintained for only a short time such as about 1 to 3 hours, and when operating a machine tool at night or the like, an operator looks around for foaming in the cutting fluid tank, When the defoaming agent was put in, the worker had to return in order to put the defoaming agent again in anticipation of the time when the defoaming effect diminished. Further, even in a cutting fluid tank device as disclosed in Patent Document 1, it may be necessary to replenish the attached defoaming agent. Further, a device for physically eliminating foaming is often large-scale as a device, and is not practical in some cases.
[0005]
[Means for Solving the Problems]
In view of the above problems, the present invention monitors the generation state of foam, eliminates foam by supplying an appropriate amount of an antifoaming agent in a timely manner, prevents foam from overflowing from the cutting fluid tank, and provides a cutting fluid tank. It is an object of the present invention to provide an antifoaming agent supply device capable of preventing a machining failure of a machine tool from being caused by a defective cutting fluid discharge due to a decrease in the liquid level.
That is, the configuration of the present invention according to claim 1 is an apparatus for supplying an antifoaming agent to a cutting fluid tank of a machine tool,
A defoamer tank for storing the defoamer, a moving means for moving the defoamer from the defoamer tank to the cutting fluid tank, and a foam detecting means for detecting a foaming surface of the cutting fluid tank; Is a defoaming agent supply device characterized in that when detecting a predetermined amount of foam or more, the moving means is driven to move the defoaming agent to the cutting fluid tank.
Thereby, when the foam detecting means detects a foam of a predetermined amount or more, the moving means is driven to move the defoaming agent to the cutting fluid tank. Even with this, the foaming of the cutting fluid does not overflow from the cutting fluid tank and contaminate the floor surface in the factory, and the machining fluid does not drop due to the lowering of the fluid level in the cutting fluid, and the machining failure of the machine tool does not occur. .
[0006]
Here, the defoaming agent has a liquid form and a solid state, and the moving means for moving the defoaming agent from the defoaming agent tank to the cutting fluid tank is, in the case of a liquid, a liquid defoaming agent from the defoaming agent tank. It is a pump that pumps and discharges it to the cutting fluid tank. If the defoaming agent tank is installed near the cutting fluid tank, the delivery distance by the pump is shortened, so that the delivery pipe can be shortened and the pump function can be reduced.
On the other hand, the moving means in the case of the solid defoaming agent is such that the defoaming agent tank is located above the cutting fluid tank, and an opening / closing opening for dropping the solid defoaming agent is provided on the lower surface of the defoaming agent tank. It is preferable to drop the fixed defoaming agent falling from the surface onto the liquid surface of the cutting fluid tank and to put it therein. Also, if the defoaming agent is a solid or a gel or a highly viscous property, a fork-shaped take-out member for scraping an appropriate amount of a defoamer such as a gel from a defoamer tank is provided, and the take-out member is provided. It is preferable to dispose in the cutting fluid by moving it into the cutting fluid in the cutting fluid tank and stirring it.
The foam detecting means is provided not only in the cutting fluid tank and in contact with the foaming surface, but also by arranging the foam detecting means outside the cutting fluid tank and irradiating the foaming surface with infrared rays or the like to increase the foaming fluid height. It is also possible to measure the height of the foamed surface by measuring the difference between the considerably smooth liquid surface and the foamed surface in which bubbles are arranged irregularly from the photographed video. In addition, the moving means for moving the defoaming agent from the defoaming agent tank to the cutting fluid tank not only constantly determines the defoaming agent to be moved, but also records the moving time interval by a time measuring member, and the moving time interval is changed. When the time is shorter than the predetermined time, it is possible for the control unit to determine that the cause of foaming is increasing or strengthening, and to increase the movement amount of the antifoaming agent.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
An antifoaming agent supply device according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing an antifoaming agent supply device according to the present invention.
The defoaming agent supply device 1 is a device that supplies a defoaming agent 4 to a cutting fluid tank 3 that supplies a cutting fluid 2 to a machine tool (not shown) by a pump or the like, and that stores the liquid defoaming agent 4. It comprises a tank 5, a pump 6 for supplying the defoaming agent 4 from the defoaming agent tank 5 to the cutting fluid tank 3 via a tube 9, and a foam detecting means 7 for detecting a foaming surface of the cutting fluid tank 3. I have. When the foam detecting means 7 detects the foam 8 of a predetermined amount or more, the pump 6 is driven to supply the antifoaming agent 4 to the cutting fluid tank 3.
The cover member 31 covering the opening of the cutting fluid tank 3 is provided with an opening through which the cutting fluid 2 returned from the machine tool flows into the cutting fluid tank 3, and an antifoaming agent 4 is provided near the opening. The tip of the tube 9 for discharging is attached. Since the foaming and the cutting fluid contained in the refluxed cutting fluid fall on the liquid surface and foam and the bubbles are easily collected, the antifoaming agent 4 to be discharged by this is directly injected into a large amount of foam. Become.
A detection sensor 71 is attached to the lid member 31 with the detection direction directed to the foam surface, and detects the foam surface by measuring the height of a float 72 of a material floating on the foam surface that moves up and down. Do. The float 72 is guided through the guide member 73 so as not to go out of the detection range of the detection sensor 71. The guide member 73 protrudes downward from the lid member 31, and a stopper 74 is attached to a tip of the guide member 73 so that the float 72 does not drop.
[0008]
The operation of the defoaming agent supply device configured as described above will be described.
The cutting fluid 2 supplied to a machine tool (not shown) by a pump or the like is refluxed, flows into the cutting fluid tank 3 from the opening of the lid member 31, and foams and cutting fluid contained in the recirculated cutting fluid flow to the fluid surface. The foam 8 falls and foams, and the foam 8 is floating on the cutting fluid 2. The float 72 floats on the upper surface of the foam 8 and moves up and down along the guide member 73 in accordance with the up and down movement of the foam surface of the foam 8.
The float 72 is constantly measuring the height by the detection sensor 72. If the height is equal to or more than the predetermined height, it can be determined that bubbles of a predetermined amount or more are generated by the bottom area of the cutting fluid tank 3. Then, the pump 6 of the defoaming agent supply device 1 is driven to suck up the defoaming agent 4 from the defoaming agent tank 5, and the defoaming agent 4 is discharged from the tip of the tube 9 to the foam 8 of the cutting fluid tank 3. Disappear.
[0009]
【The invention's effect】
According to the antifoaming agent supply device of the present invention, when the foam detecting means detects the foam of a predetermined amount or more, the moving means is driven to move the antifoaming agent to the cutting fluid tank, so that the foam is generated in the predetermined amount or more. Each time the cutting fluid is removed, foaming of the cutting fluid overflows from the cutting fluid tank and soils the floor in the factory. Processing defects do not occur.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a configuration of an antifoaming agent supply device of the present invention.
[Explanation of symbols]
1. Defoaming agent supply device, 2. Cutting fluid, 3. Cutting fluid tank, 4. Defoaming agent, 5. Defoaming agent tank, 6, Pump, 7. Foam detecting means, 8 · · · Foam, 9 · · · tube, 31 · · · lid member, 71 · · · detection sensor, 72 · · · float, 73 · · · · guide member, 74 · · · · ·.

Claims (1)

工作機械の切削液タンクに消泡剤を供給する装置であって、消泡剤を貯蔵する消泡剤タンクと、消泡剤タンクから消泡剤を切削液タンクへ移動させる移動手段と、切削液タンク内に設けられた泡検知手段とからなり、泡検知手段が所定量以上の泡を検知したときに移動手段を駆動して消泡剤を切削液タンクに供給することを特徴とする消泡剤供給装置。An apparatus for supplying an antifoaming agent to a cutting fluid tank of a machine tool, the defoaming agent tank storing the defoaming agent, a moving means for moving the antifoaming agent from the defoaming agent tank to the cutting fluid tank, A foam detecting means provided in the liquid tank, wherein when the foam detecting means detects a predetermined amount or more of foam, the moving means is driven to supply the defoaming agent to the cutting fluid tank. Foam supply device.
JP2002277855A 2002-09-24 2002-09-24 Defoaming agent supplying device Pending JP2004114181A (en)

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JP2010220499A (en) * 2009-03-19 2010-10-07 Meiji Milk Prod Co Ltd Method for detecting foam of reaction liquid and defoaming apparatus
KR20170100429A (en) * 2016-02-24 2017-09-04 경남대학교 산학협력단 A device for recycling cutting oil
KR102021423B1 (en) * 2018-12-14 2019-09-16 최형식 Coolant regeneration and recycling feeder

Cited By (4)

* Cited by examiner, † Cited by third party
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JP2007160717A (en) * 2005-12-14 2007-06-28 Seiko Epson Corp Liquid ejector and its maintenance method
JP2010220499A (en) * 2009-03-19 2010-10-07 Meiji Milk Prod Co Ltd Method for detecting foam of reaction liquid and defoaming apparatus
KR20170100429A (en) * 2016-02-24 2017-09-04 경남대학교 산학협력단 A device for recycling cutting oil
KR102021423B1 (en) * 2018-12-14 2019-09-16 최형식 Coolant regeneration and recycling feeder

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