JP7489299B2 - Cutting fluid supply and recovery device for machine tools - Google Patents

Cutting fluid supply and recovery device for machine tools Download PDF

Info

Publication number
JP7489299B2
JP7489299B2 JP2020196014A JP2020196014A JP7489299B2 JP 7489299 B2 JP7489299 B2 JP 7489299B2 JP 2020196014 A JP2020196014 A JP 2020196014A JP 2020196014 A JP2020196014 A JP 2020196014A JP 7489299 B2 JP7489299 B2 JP 7489299B2
Authority
JP
Japan
Prior art keywords
cutting fluid
spindle
ejector
side port
supply
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.)
Active
Application number
JP2020196014A
Other languages
Japanese (ja)
Other versions
JP2022084269A (en
Inventor
知史 青山
幸夫 後藤
恒 瀬川
泰希 泉井
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
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 filed Critical Okuma Corp
Priority to JP2020196014A priority Critical patent/JP7489299B2/en
Publication of JP2022084269A publication Critical patent/JP2022084269A/en
Application granted granted Critical
Publication of JP7489299B2 publication Critical patent/JP7489299B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Auxiliary Devices For Machine Tools (AREA)

Description

本発明は、マシニングセンタ等の工作機械の切削液供給回収装置に関する。 The present invention relates to a cutting fluid supply and recovery device for machine tools such as machining centers.

従来の工作機械として、主軸の後部から先端方向に主軸および工具ホルダを貫通するように切削液流通孔を設け、この切削液流通孔を通してスルースピンドル方式で切削液の噴射を行うものが知られている。 A known conventional machine tool has a cutting fluid passage hole that runs from the rear of the spindle to the tip, through the spindle and tool holder, and the cutting fluid is sprayed through this hole using a through-spindle method.

スルースピンドル方式の切削液供給回収装置を備えた工作機械は、非加工時または工具交換時において、切削液の供給を停止し、エアーを供給することにより主軸および工具ホルダに残留する切削液(主軸内残留切削液)を排出している。 Machine tools equipped with a through-spindle type cutting fluid supply and recovery device stop the supply of cutting fluid when not machining or when changing tools, and drain the cutting fluid remaining in the spindle and tool holder (residual cutting fluid in the spindle) by supplying air.

しかしながら、自動工具交換装置により工具の交換を行う際、主軸先端から工具ホルダが取り外されるときに、主軸と工具ホルダとの間で切削液流通孔が分断されるため、分断部分から主軸および工具ホルダの切削液流通孔に残留する切削液が漏れ出していた。主軸内残留切削液が漏れ出すと、切削液に混じった微小切粉による噛み込みが生じ不具合が生じるおそれがある。 However, when changing tools using an automatic tool changer, the cutting fluid flow holes between the spindle and the tool holder are disconnected when the tool holder is removed from the tip of the spindle, causing the cutting fluid remaining in the cutting fluid flow holes of the spindle and the tool holder to leak out from the disconnected part. When the remaining cutting fluid in the spindle leaks out, tiny chips mixed in with the cutting fluid can get caught, causing malfunctions.

非加工時あるいは工具交換時の工具内の切削液が工具外へ排出されないようにする手段としては、主軸内残留切削液を吸引するものが知られており、特許文献1には、切削液供給回収経路と、切削液供給回収経路に配された流路切換弁、エジェクタおよびポンプとを備えており、ポンプ1つでスルースピンドル吐出および吸引を実施する工作機械の切削液供給回収装置が開示されている。 As a means for preventing the cutting fluid in the tool from being discharged outside the tool when not machining or when the tool is being replaced, a device that sucks up the cutting fluid remaining in the spindle is known, and Patent Document 1 discloses a cutting fluid supply and recovery device for a machine tool that is equipped with a cutting fluid supply and recovery path, a flow path switching valve, an ejector, and a pump arranged in the cutting fluid supply and recovery path, and that performs through-spindle discharge and suction with a single pump.

特許第2965468号公報Japanese Patent No. 2965468

特許文献1の工作機械の切削液供給回収装置によると、ポンプ1つでスルースピンドル吐出および吸引を実施しているため、吸引に必要な負圧が発生するまでに時間がかかり、十分に主軸内残留切削液の回収機能を発揮できないという問題があった。また、1つのポンプでスルースピンドル吐出と吸引を行っている為、吸引後の切削液を洗浄に使用すると、その間は、スルースピンドル吐出が行えなくなるという問題もあった。 According to the cutting fluid supply and recovery device for machine tools in Patent Document 1, because through-spindle discharge and suction are performed by a single pump, it takes time for the negative pressure required for suction to be generated, and there is a problem that the function of recovering residual cutting fluid in the spindle cannot be fully performed. In addition, because through-spindle discharge and suction are performed by a single pump, there is also a problem that if the suctioned cutting fluid is used for cleaning, through-spindle discharge cannot be performed during that time.

この発明の目的は、極めて短時間で主軸内残留切削液の吸引を行うことができる工作機械の切削液供給回収装置を提供することにある。 The object of this invention is to provide a cutting fluid supply and recovery device for a machine tool that can suck up residual cutting fluid in the spindle in an extremely short time.

この発明の他の目的は、吸引後の切削液を洗浄に使用する際の効率に優れた工作機械の切削液供給回収装置を提供することにある。 Another object of the invention is to provide a cutting fluid supply and recovery device for a machine tool that is highly efficient when using the sucked cutting fluid for cleaning.

この発明による工作機械の切削液供給回収装置は、主軸装置作動中に切削液タンクの切削液を主軸に供給し、主軸装置作動停止時に主軸内残留切削液を切削液タンクに回収するための切削液供給回収経路と、切削液供給回収経路に配された流路切換弁、エジェクタおよび2つのポンプとを備えた工作機械の切削液供給回収装置であって、流路切換弁は、主軸側ポート、主ポンプ側ポートおよびエジェクタ側ポートを有し、切削液供給回収経路の流路切換弁の主ポンプ側ポートと切削液タンクとの間に、主軸に切削液を供給するための主ポンプが設けられ、切削液供給回収経路のエジェクタの供給側ポートと切削液タンクとの間に、副ポンプが設けられており、副ポンプによってエジェクタの供給側ポートに切削液タンクの切削液を供給することにより、流路切換弁のエジェクタ側ポートとエジェクタとの間に負圧を発生することができ、予め副ポンプからの切削液の吐出をすることにより、事前にエジェクタ側通路が負圧となり、主軸内残留切削液を瞬時に吸引することができるものである。 The cutting fluid supply and recovery device for a machine tool according to the present invention is a cutting fluid supply and recovery device for a machine tool comprising a cutting fluid supply and recovery path for supplying cutting fluid from a cutting fluid tank to the spindle while the spindle is operating and recovering cutting fluid remaining in the spindle to the cutting fluid tank when the spindle is stopped, and a flow path switching valve, an ejector and two pumps arranged in the cutting fluid supply and recovery path, the flow path switching valve having a spindle side port, a main pump side port and an ejector side port, a main pump for supplying cutting fluid to the spindle is provided between the main pump side port of the flow path switching valve of the cutting fluid supply and recovery path and the cutting fluid tank, and an auxiliary pump is provided between the supply side port of the ejector of the cutting fluid supply and recovery path and the cutting fluid tank, and by supplying cutting fluid from the cutting fluid tank to the supply side port of the ejector by the auxiliary pump, negative pressure can be generated between the ejector side port of the flow path switching valve and the ejector, and by discharging cutting fluid from the auxiliary pump in advance, negative pressure can be created in the ejector side passage in advance, allowing the cutting fluid remaining in the spindle to be instantly sucked in .

主軸装置作動中には、流路切換弁のエジェクタ側ポートは閉じられ、流路切換弁の主ポンプ側ポートと主軸側ポートとが連通され、これにより、主ポンプによって切削液が主軸に供給される。副ポンプによると、切削液タンクの切削液をエジェクタを介して主軸以外の構成(例えば切粉の洗浄のためのノズルなど)に供給することができる。副ポンプを作動することで、流路切換弁のエジェクタ側ポートとエジェクタとの間に負圧が発生する。 When the spindle unit is operating, the ejector side port of the flow path switching valve is closed and the main pump side port of the flow path switching valve is connected to the main spindle side port, allowing the main pump to supply cutting fluid to the spindle. The auxiliary pump allows cutting fluid from the cutting fluid tank to be supplied to components other than the spindle (such as a nozzle for cleaning chips) via the ejector. By operating the auxiliary pump, negative pressure is generated between the ejector side port of the flow path switching valve and the ejector.

流路切換弁のエジェクタ側ポートとエジェクタとの間に負圧が発生している状態で、流路切換弁の主ポンプ側ポートが閉じられて、流路切換弁の主軸側ポートとエジェクタ側ポートとが連通されると、主軸内残留切削液は、負圧によって瞬時にエジェクタ側に送られる。この動作を主軸装置作動停止時に行うことで、極めて短時間で主軸内残留切削液の吸引を行うことができる。 When negative pressure is generated between the ejector side port of the flow path switching valve and the ejector, and the main pump side port of the flow path switching valve is closed and the spindle side port of the flow path switching valve is connected to the ejector side port, the residual cutting fluid in the spindle is instantly sent to the ejector side by the negative pressure. By performing this operation when the spindle device is stopped, the residual cutting fluid in the spindle can be sucked out in an extremely short time.

この発明において、エジェクタの流出ポートが洗浄吐出口に接続されていることが好ましい。 In this invention, it is preferable that the outlet port of the ejector is connected to the cleaning outlet.

このようにすると、特別な動力装置を必要とせず、エジェクタを介して主軸および工具ホルダから吸引した切削液や副ポンプからエジェクタに供給された切削液をワーク加工室内や段取りステーション、工具マガジン内の切粉洗浄、切削液タンク内の切粉回収に利用することができる。これにより、吸引後の切削液を洗浄に使用した際であっても、スルースピンドル吐出が行えなくなることはなく、吸引後の切削液を洗浄に使用する際の効率が優れたものとなる。 In this way, no special power unit is required, and the cutting fluid sucked from the spindle and tool holder via the ejector and the cutting fluid supplied to the ejector from the sub-pump can be used to clean chips inside the workpiece machining chamber, the setup station, and the tool magazine, and to collect chips in the cutting fluid tank. This means that even when the sucked-in cutting fluid is used for cleaning, through-spindle discharge is not impossible, and the efficiency of using the sucked-in cutting fluid for cleaning is excellent.

この発明の工作機械の切削液供給回収装置によれば、主軸への切削液供給用の主ポンプに加えて、エジェクタの負圧発生用の副ポンプが設けられていることで、極めて短時間で主軸内残留切削液の吸引を行うことができる。 The cutting fluid supply and recovery device for machine tools of this invention has a main pump for supplying cutting fluid to the spindle, and a sub-pump for generating negative pressure in the ejector, so that residual cutting fluid in the spindle can be sucked out in an extremely short time.

また、この発明の工作機械の切削液供給回収装置によれば、吸引後の切削液を洗浄等に使用する際の効率が優れたものとできる。 In addition, the cutting fluid supply and recovery device for machine tools of this invention can provide excellent efficiency when using the sucked cutting fluid for cleaning, etc.

図1は、この発明の工作機械の切削液供給回収装置の1実施形態を示す概略図で、主軸に切削液を供給している状態を示している。FIG. 1 is a schematic diagram showing an embodiment of a cutting fluid supply and recovery device for a machine tool according to the present invention, illustrating a state in which cutting fluid is being supplied to a spindle. 図2は、図1に示した状態から流路切換弁により流路が切り換えられて、主軸内残留切削液を吸引している状態を示す概略図である。FIG. 2 is a schematic diagram showing a state in which the flow path has been switched from the state shown in FIG. 1 by the flow path switching valve and cutting fluid remaining in the spindle is being sucked.

以下、図面を参照して、この発明の実施の形態を説明する。 The following describes an embodiment of the invention with reference to the drawings.

図1および図2に示すように、工作機械の切削液供給回収装置(1)は、主軸装置作動中に切削液タンク(3)の切削液をスルースピンドル方式の主軸(2)に供給し、主軸装置作動停止時に主軸内残留切削液を切削液タンク(3)に回収する装置であり、そのための切削液供給回収経路(4)と、切削液供給回収経路(4)に配された流路切換弁(5)、エジェクタ(6)、2つのポンプ(主ポンプ(7)と副ポンプ(8))および洗浄吐出口(9)とを備えている。 As shown in Figures 1 and 2, the cutting fluid supply and recovery device (1) for a machine tool supplies cutting fluid from a cutting fluid tank (3) to a through-spindle type spindle (2) while the spindle is in operation, and recovers the cutting fluid remaining in the spindle back to the cutting fluid tank (3) when the spindle stops operating. For this purpose, the device is equipped with a cutting fluid supply and recovery path (4), a flow path switching valve (5) arranged in the cutting fluid supply and recovery path (4), an ejector (6), two pumps (main pump (7) and auxiliary pump (8)), and a cleaning discharge port (9).

図示省略するが、主軸(2)および工具ホルダには、切削液を工具の先端からワーク加工領域に向けて吐出させるために、切削液流通孔が設けられている。 Although not shown, the spindle (2) and the tool holder are provided with cutting fluid flow holes to eject cutting fluid from the tip of the tool toward the workpiece machining area.

流路切換弁(5)は、流路方向を切り換えるソレノイド方式の3ポートの電磁弁であり、主ポンプ側ポート(5a)、エジェクタ側ポート(5b)および主軸側ポート(5c)を有しており、主ポンプ側ポート(5a)と主軸側ポート(5c)とを連通して、エジェクタ側ポート(5b)を閉じる第1の流路形態(図1参照)と、エジェクタ側ポート(5b)と主軸側ポート(5c)とを連通して、主ポンプ側ポート(5a)を閉じる第2の流路形態(図2参照)とに切り換えることができる。流路切換弁(5)は、図示しない制御装置に接続されており、制御装置によって流路の切り換えが行われている。 The flow path switching valve (5) is a solenoid-type three-port electromagnetic valve that switches the flow path direction. It has a main pump side port (5a), an ejector side port (5b), and a spindle side port (5c). It can be switched between a first flow path configuration (see FIG. 1) in which the main pump side port (5a) and the spindle side port (5c) are connected and the ejector side port (5b) is closed, and a second flow path configuration (see FIG. 2) in which the ejector side port (5b) and the spindle side port (5c) are connected and the main pump side port (5a) is closed. The flow path switching valve (5) is connected to a control device (not shown), and the control device switches the flow paths.

エジェクタ(6)は、周知の流体排出装置であり、構成の図示は省略するが、中空状の本体内に本体と同心のノズルが形成されており、本体の一端に形成されてノズルの入口に通じる供給側ポート(6a)と、本体の他端に形成されてノズルの出口に通じる出口側ポート(6b)と、本体の周壁に形成されてノズルの外周を臨む吸引側ポート(6c)とを有している。 The ejector (6) is a well-known fluid discharge device, and although its configuration is not shown in the drawings, it has a nozzle formed inside a hollow body that is concentric with the body, a supply side port (6a) formed at one end of the body and leading to the inlet of the nozzle, an outlet side port (6b) formed at the other end of the body and leading to the outlet of the nozzle, and a suction side port (6c) formed in the peripheral wall of the body and facing the outer periphery of the nozzle.

エジェクタ(6)によると、ノズルから第1の流体(この実施形態では、副ポンプ(8)から吐出される切削液)を高速に噴出し、噴流の巻き込み作用により負圧を発生させて、この負圧により第2の流体(この実施形態では、主軸内残留切削液)を吸引、排出することができる。 The ejector (6) ejects a first fluid (in this embodiment, cutting fluid discharged from the auxiliary pump (8)) from a nozzle at high speed, and generates negative pressure due to the entrainment action of the jet, which can suck in and discharge a second fluid (in this embodiment, cutting fluid remaining in the spindle).

主ポンプ(7)は、モータに駆動されて切削液タンク(3)の切削液をスルースピンドル方式の主軸(2)に吐出するもので、流路切換弁(5)、主軸側通路(4b)およびロータリージョイント(図示略)等を介して主軸(2)の切削液流通孔に連通している。切削液タンク(3)から供給された切削液は、切削液流通孔の後端から先端に流通して、工具先端からワーク加工領域に噴出される。 The main pump (7) is driven by a motor to discharge cutting fluid from the cutting fluid tank (3) to the through-spindle type spindle (2), and is connected to the cutting fluid flow hole of the spindle (2) via a flow path switching valve (5), a spindle side passage (4b), a rotary joint (not shown), etc. The cutting fluid supplied from the cutting fluid tank (3) flows from the rear end of the cutting fluid flow hole to the front end, and is sprayed from the tip of the tool into the workpiece machining area.

副ポンプ(8)は、モータに駆動されて切削液タンク(3)の切削液を洗浄吐出口(9)に吐出するもので、副ポンプ側通路(4d)、エジェクタ(6)および洗浄ノズル側通路(4e)を介して洗浄吐出口(9)に連通している。副ポンプ(8)は、エジェクタ(6)に対しては、負圧を発生するための流体として切削液を吐出する機能を有している。 The auxiliary pump (8) is driven by a motor to discharge cutting fluid from the cutting fluid tank (3) to the cleaning discharge port (9), and is connected to the cleaning discharge port (9) via the auxiliary pump side passage (4d), the ejector (6), and the cleaning nozzle side passage (4e). The auxiliary pump (8) has the function of discharging cutting fluid to the ejector (6) as a fluid for generating negative pressure.

洗浄吐出口(9)からは、例えば、切粉の洗浄のためにワーク加工室に設置されている切粉洗浄ノズルに切削液が供給され、主軸内残留切削液を切削液タンク(3)に回収する前に洗浄吐出口(9)に供給することで、主軸内残留切削液を利用して洗浄を行うことができる。洗浄吐出口(9)からの切削液は、ワーク加工室内の切粉洗浄のほか、段取りステーション、工具マガジン内の切粉洗浄、切削液タンク内の切粉回収などに利用することができる。洗浄吐出口(9)へは副ポンプ(8)から切削液タンク(3)の切削液を供給することができ、主軸内残留切削液の回収中でない時でも、切粉の洗浄等を行うことができる。 For example, cutting fluid is supplied from the cleaning outlet (9) to a chip cleaning nozzle installed in the workpiece machining chamber to clean chips, and by supplying the cutting fluid remaining in the spindle to the cleaning outlet (9) before collecting it in the cutting fluid tank (3), cleaning can be performed using the cutting fluid remaining in the spindle. The cutting fluid from the cleaning outlet (9) can be used to clean chips in the workpiece machining chamber, as well as to clean chips in the setup station and tool magazine, and to collect chips in the cutting fluid tank. The cleaning outlet (9) can be supplied with cutting fluid from the cutting fluid tank (3) from the auxiliary pump (8), so that cleaning of chips can be performed even when the cutting fluid remaining in the spindle is not being collected.

切削液供給回収経路(4)は、主ポンプ(7)と流路切換弁(5)の主ポンプ側ポート(5a)とを連通する主ポンプ側通路(4a)と、流路切換弁(5)の主軸側ポート(5c)と主軸(2)とを連通する主軸側通路(4b)と、流路切換弁(5)のエジェクタ側ポート(5b)とエジェクタ(6)の吸引側ポート(6c)とを連通するエジェクタ側通路(4c)と、副ポンプ(8)とエジェクタ(6)の供給側ポート(6a)とを連通する副ポンプ側通路(4d)と、エジェクタ(6)の出口側ポート(6b)と洗浄吐出口(9)とを連通する洗浄ノズル側通路(4e)と、洗浄吐出口(9)と切削液タンク(3)とを連通する切削液タンク側通路(4f)とからなる。 The cutting fluid supply and recovery path (4) is composed of a main pump side passage (4a) that connects the main pump (7) to the main pump side port (5a) of the flow path switching valve (5), a main shaft side passage (4b) that connects the main shaft side port (5c) of the flow path switching valve (5) to the main shaft (2), an ejector side passage (4c) that connects the ejector side port (5b) of the flow path switching valve (5) to the suction side port (6c) of the ejector (6), an auxiliary pump side passage (4d) that connects the auxiliary pump (8) to the supply side port (6a) of the ejector (6), a cleaning nozzle side passage (4e) that connects the outlet side port (6b) of the ejector (6) to the cleaning discharge port (9), and a cutting fluid tank side passage (4f) that connects the cleaning discharge port (9) to the cutting fluid tank (3).

次に、この実施形態の工作機械の切削液供給回収装置(1)の作用を説明する。 Next, the operation of the cutting fluid supply and recovery device (1) for the machine tool of this embodiment will be described.

工作機械がワークの切削加工を行う際、まず、図1に示すように、流路切換弁(5)は、励磁されて主ポンプ側ポート(5a)と主軸側ポート(5c)とが連通する第1の流路形態となる。これにより、切削液タンク(3)内の切削液は、主ポンプ(7)により、主ポンプ側通路(4a)、流路切換弁(5)および主軸側通路(4b)を介して主軸(2)の切削液流通孔に供給される。切削液流通孔に供給された高圧の切削液は、主軸(2)および工具ホルダを貫通してワークの加工領域に向けて噴出される。 When the machine tool performs cutting processing on a workpiece, first, as shown in FIG. 1, the flow path switching valve (5) is excited to establish a first flow path configuration in which the main pump side port (5a) and the spindle side port (5c) are connected. As a result, the cutting fluid in the cutting fluid tank (3) is supplied by the main pump (7) to the cutting fluid flow hole of the spindle (2) via the main pump side passage (4a), the flow path switching valve (5), and the spindle side passage (4b). The high-pressure cutting fluid supplied to the cutting fluid flow hole is sprayed through the spindle (2) and the tool holder toward the machining area of the workpiece.

この際、副ポンプ(8)からの切削液の吐出については、行ってもよく、行わなくてもよい。切削液を吐出することで、洗浄吐出口(9)への洗浄用切削液が供給され、エジェクタ(6)の吸引側ポート(6c)に負圧が発生する。 At this time, the cutting fluid may or may not be discharged from the auxiliary pump (8). By discharging the cutting fluid, the cleaning cutting fluid is supplied to the cleaning discharge port (9), and negative pressure is generated in the suction side port (6c) of the ejector (6).

所定の加工プロセスが終了すると、主軸(2)の回転が停止され、工作機械が工具の交換動作を開始する。 When the specified machining process is completed, the rotation of the spindle (2) is stopped and the machine tool starts the tool replacement operation.

このとき、図2に示すように、流路切換弁(5)が消磁されて、エジェクタ側ポート(5b)と主軸側ポート(5c)とが連通する第2の流路形態となる。副ポンプ(8)からの切削液の吐出によって、エジェクタ(6)の吸引側ポート(6c)に負圧が発生する。この負圧により、主軸(2)および工具ホルダの切削液流通孔内の主軸内残留切削液は、吸引側ポート(6c)からエジェクタ(6)に吸引され、エジェクタ(6)の出口側ポート(6b)および洗浄ノズル側通路(4e)を介して洗浄吐出口(9)に供給される。また、切削加工時に、予め副ポンプ(8)からの切削液の吐出をしていた場合、事前にエジェクタ側通路(4c)が負圧となり、工作機械が工具の交換動作時に流路切換弁(5)が消磁された瞬間に主軸(2)および工具ホルダの切削液流通孔内の主軸内残留切削液を瞬時に吸引側ポート(6c)からエジェクタ(6)に吸引することが可能となる。 At this time, as shown in Figure 2, the flow path switching valve (5) is demagnetized, resulting in a second flow path configuration in which the ejector side port (5b) and the spindle side port (5c) are connected. Negative pressure is generated in the suction side port (6c) of the ejector (6) by the discharge of cutting fluid from the auxiliary pump (8). This negative pressure causes the residual cutting fluid in the spindle, which is in the cutting fluid flow holes of the spindle (2) and the tool holder, to be sucked into the ejector (6) from the suction side port (6c) and supplied to the cleaning discharge port (9) via the outlet side port (6b) of the ejector (6) and the cleaning nozzle side passage (4e). In addition, if cutting fluid has been discharged from the auxiliary pump (8) beforehand during cutting processing, the ejector side passage (4c) will be under negative pressure in advance, and the moment the flow path switching valve (5) is demagnetized during the tool replacement operation of the machine tool, the residual cutting fluid in the spindle (2) and in the cutting fluid flow holes of the tool holder can be instantly sucked into the ejector (6) through the suction side port (6c).

主軸(2)の切削液流通孔から切削液が漏れるのは、切削液流通孔に切削液が残留しているときに工具ホルダを主軸(2)から取り外す場合や、工具を交換する場合であるので、主軸内残留切削液が主軸(2)から除去された後は、工具ホルダの取り外しや工具の交換によって、切削液が漏れ出すことはない。 Cutting fluid leaks from the cutting fluid flow hole of the spindle (2) when the tool holder is removed from the spindle (2) or when a tool is replaced while cutting fluid remains in the cutting fluid flow hole. Therefore, after the residual cutting fluid in the spindle is removed from the spindle (2), the cutting fluid will not leak out when the tool holder is removed or a tool is replaced.

副ポンプ(8)がエジェクタ(6)を介して洗浄吐出口(9)に接続されていることにより、主軸(2)および工具ホルダの切削液流通孔から吸引した主軸内残留切削液や副ポンプ(8)から負圧発生用にエジェクタ(6)に供給された切削液を切粉の洗浄に利用することができる。主軸内残留切削液を切削液タンク(3)に回収する前に洗浄吐出口(9)に供給することで、主軸内残留切削液を有効に利用することができる。また、副ポンプ(8)によって切削液を洗浄吐出口(9)に供給することで、主ポンプ(7)から切削液を洗浄吐出口(9)に供給することが不要となり、必要なときにいつでも主ポンプ(7)から主軸(2)に切削液の供給を行うことができる。 By connecting the auxiliary pump (8) to the cleaning discharge port (9) via the ejector (6), the residual cutting fluid in the spindle sucked from the cutting fluid flow holes of the spindle (2) and the tool holder and the cutting fluid supplied from the auxiliary pump (8) to the ejector (6) for generating negative pressure can be used to clean the chips. By supplying the residual cutting fluid in the spindle to the cleaning discharge port (9) before collecting it in the cutting fluid tank (3), the residual cutting fluid in the spindle can be used effectively. In addition, by supplying cutting fluid to the cleaning discharge port (9) by the auxiliary pump (8), it is no longer necessary to supply cutting fluid from the main pump (7) to the cleaning discharge port (9), and cutting fluid can be supplied from the main pump (7) to the spindle (2) whenever necessary.

こうして、この実施形態の工作機械の切削液供給回収装置(1)によると、極めて短時間で残留切削液の吸引を行うことができるとともに、副ポンプ(8)が負圧発生用および洗浄用の両方の切削液供給を行うことで、切削液を洗浄に使用する際の効率に優れた切削液供給回収装置が得られている。 Thus, with the cutting fluid supply and recovery device (1) for a machine tool in this embodiment, residual cutting fluid can be sucked up in an extremely short time, and the auxiliary pump (8) supplies cutting fluid for both generating negative pressure and for cleaning, resulting in a cutting fluid supply and recovery device that is highly efficient when using cutting fluid for cleaning.

なお、上記特許文献1記載の工作機械の切削液供給回収装置は、複数の弁を使用しているが、本願発明の工作機械の切削液供給回収装置(1)では、弁を1つに集約しているので、部品点数を削減することもできる。 The cutting fluid supply and recovery device for machine tools described in Patent Document 1 uses multiple valves, but the cutting fluid supply and recovery device for machine tools (1) of the present invention consolidates the valves into one, which reduces the number of parts.

(1):切削液供給回収装置
(2):主軸
(3):切削液タンク
(4):切削液供給回収経路
(5):流路切換弁
(5a):主ポンプ側ポート
(5b):エジェクタ側ポート
(5c):主軸側ポート
(6a):供給側ポート
(6):エジェクタ
(6c):吸引側ポート
(7):主ポンプ
(8):副ポンプ
(9):洗浄吐出口
(1): Cutting fluid supply and recovery device
(2): Main shaft
(3) Cutting fluid tank
(4): Cutting fluid supply and recovery route
(5): Flow path switching valve
(5a): Main pump side port
(5b): Ejector side port
(5c): Spindle side port
(6a): Supply port
(6): Ejector
(6c): Suction port
(7): Main pump
(8): Auxiliary pump
(9): Cleaning outlet

Claims (2)

主軸装置作動中に切削液タンクの切削液を主軸に供給し、主軸装置作動停止時に主軸内残留切削液を切削液タンクに回収するための切削液供給回収経路と、切削液供給回収経路に配された切換弁、エジェクタおよび2つのポンプとを備えた工作機械の切削液供給回収装置であって、
切換弁は、主軸側ポート、主ポンプ側ポートおよびエジェクタ側ポートを有し、切削液供給回収経路の切換弁の主ポンプ側ポートと切削液タンクとの間に、主軸に切削液を供給するための主ポンプが設けられ、切削液供給回収経路のエジェクタの供給側ポートと切削液タンクとの間に、副ポンプが設けられており、
副ポンプによってエジェクタの供給側ポートに切削液タンクの切削液を供給することにより、切換弁のエジェクタ側ポートとエジェクタの吸引側ポートとの間に負圧を発生することができ
予め副ポンプからの切削液の吐出をすることにより、事前にエジェクタ側通路が負圧となり、主軸内残留切削液を瞬時に吸引することができる、
工作機械の切削液供給回収装置。
A cutting fluid supply and recovery device for a machine tool, comprising: a cutting fluid supply and recovery path for supplying cutting fluid from a cutting fluid tank to a spindle while the spindle is in operation, and recovering cutting fluid remaining in the spindle into the cutting fluid tank when the spindle is stopped, and a switching valve, an ejector, and two pumps disposed in the cutting fluid supply and recovery path,
The switching valve has a spindle side port, a main pump side port, and an ejector side port, and a main pump for supplying cutting fluid to the spindle is provided between the main pump side port of the switching valve and the cutting fluid tank in the cutting fluid supply and recovery path, and an auxiliary pump is provided between the supply side port of the ejector and the cutting fluid tank in the cutting fluid supply and recovery path,
By supplying cutting fluid from the cutting fluid tank to the supply side port of the ejector by the auxiliary pump, negative pressure can be generated between the ejector side port of the switching valve and the suction side port of the ejector ,
By discharging the cutting fluid from the sub-pump in advance, the ejector-side passage is put into negative pressure in advance, and the cutting fluid remaining in the spindle can be instantly sucked in .
Cutting fluid supply and recovery device for machine tools.
主軸装置作動中に切削液タンクの切削液を主軸に供給し、主軸装置作動停止時に主軸内残留切削液を切削液タンクに回収するための切削液供給回収経路と、切削液供給回収経路に配された切換弁、エジェクタおよび2つのポンプとを備えた工作機械の切削液供給回収装置であって、
切換弁は、主軸側ポート、主ポンプ側ポートおよびエジェクタ側ポートを有し、切削液供給回収経路の切換弁の主ポンプ側ポートと切削液タンクとの間に、主軸に切削液を供給するための主ポンプが設けられ、切削液供給回収経路のエジェクタの供給側ポートと切削液タンクとの間に、副ポンプが設けられており、
副ポンプによってエジェクタの供給側ポートに切削液タンクの切削液を供給することにより、切換弁のエジェクタ側ポートとエジェクタの吸引側ポートとの間に負圧を発生することができ、
エジェクタの流出ポートが洗浄吐出口に接続されている、工作機械の切削液供給回収装置。
A cutting fluid supply and recovery device for a machine tool, comprising: a cutting fluid supply and recovery path for supplying cutting fluid from a cutting fluid tank to a spindle while the spindle is in operation, and recovering cutting fluid remaining in the spindle into the cutting fluid tank when the spindle is stopped, and a switching valve, an ejector, and two pumps disposed in the cutting fluid supply and recovery path,
The switching valve has a spindle side port, a main pump side port, and an ejector side port, and a main pump for supplying cutting fluid to the spindle is provided between the main pump side port of the switching valve and the cutting fluid tank in the cutting fluid supply and recovery path, and an auxiliary pump is provided between the supply side port of the ejector and the cutting fluid tank in the cutting fluid supply and recovery path,
By supplying cutting fluid from the cutting fluid tank to the supply side port of the ejector by the auxiliary pump, negative pressure can be generated between the ejector side port of the switching valve and the suction side port of the ejector,
A cutting fluid supply and recovery device for a machine tool , in which the outlet port of the ejector is connected to the cleaning discharge port.
JP2020196014A 2020-11-26 2020-11-26 Cutting fluid supply and recovery device for machine tools Active JP7489299B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020196014A JP7489299B2 (en) 2020-11-26 2020-11-26 Cutting fluid supply and recovery device for machine tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020196014A JP7489299B2 (en) 2020-11-26 2020-11-26 Cutting fluid supply and recovery device for machine tools

Publications (2)

Publication Number Publication Date
JP2022084269A JP2022084269A (en) 2022-06-07
JP7489299B2 true JP7489299B2 (en) 2024-05-23

Family

ID=81868176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020196014A Active JP7489299B2 (en) 2020-11-26 2020-11-26 Cutting fluid supply and recovery device for machine tools

Country Status (1)

Country Link
JP (1) JP7489299B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7344420B1 (en) 2023-03-02 2023-09-13 Dmg森精機株式会社 Machine tools, machine tool control methods, and machine tool control programs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2965468B2 (en) 1994-10-19 1999-10-18 株式会社牧野フライス製作所 Processing fluid supply device
JP2001198772A (en) 2000-01-19 2001-07-24 Kira Corporation:Kk Machining device having function for removing cutting fluid remaining in cutting fluid passage
JP2018192536A (en) 2017-05-12 2018-12-06 オークマ株式会社 Cutting-liquid supply recovery system of machine tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2965468B2 (en) 1994-10-19 1999-10-18 株式会社牧野フライス製作所 Processing fluid supply device
JP2001198772A (en) 2000-01-19 2001-07-24 Kira Corporation:Kk Machining device having function for removing cutting fluid remaining in cutting fluid passage
JP2018192536A (en) 2017-05-12 2018-12-06 オークマ株式会社 Cutting-liquid supply recovery system of machine tool

Also Published As

Publication number Publication date
JP2022084269A (en) 2022-06-07

Similar Documents

Publication Publication Date Title
JP5674847B2 (en) Machine tool with cutting fluid filtration device
JP7489299B2 (en) Cutting fluid supply and recovery device for machine tools
TW589244B (en) Vacuum chuck apparatus
JP3788277B2 (en) Deep hole cutting equipment
JPS5953141A (en) Cutting tool apparatus with chips suction apparatus
JP2965468B2 (en) Processing fluid supply device
CN204639767U (en) The filter device to washing liquit of lathe
JP2010105116A (en) Machine tool
JP5402668B2 (en) Tool cleaning equipment for machine tools
JPH0317616B2 (en)
JPS6014660B2 (en) Coolant supply device
JP2018192536A (en) Cutting-liquid supply recovery system of machine tool
JP5321404B2 (en) Tool cleaning equipment for machine tools
JP5321412B2 (en) Tool cleaning equipment for machine tools
JP3979223B2 (en) Coolant filtration device for machine tools
WO2000062973A1 (en) Coolant feeding device of machine tool
JP7304217B2 (en) Cutting fluid supply and recovery device in the spindle of a machine tool
CN217913250U (en) Tapping machine for stamping die part machining
JP7132361B2 (en) Machine Tools
JP3620954B2 (en) Cutting fluid supply device
JP2002178207A (en) Fine hole drilling method, tool holder using for the same method and machining center
CN219094489U (en) Air path system of machine tool
JP2751972B2 (en) Flushing device
JP2551311Y2 (en) Flushing equipment for electric discharge machine
JPH0628161Y2 (en) Defoaming device for cutting fluid

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20230630

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20240220

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20240221

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20240419

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20240507

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20240513

R150 Certificate of patent or registration of utility model

Ref document number: 7489299

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150