WO2013161358A1 - Hydraulic device and industrial machine - Google Patents
Hydraulic device and industrial machine Download PDFInfo
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- WO2013161358A1 WO2013161358A1 PCT/JP2013/053944 JP2013053944W WO2013161358A1 WO 2013161358 A1 WO2013161358 A1 WO 2013161358A1 JP 2013053944 W JP2013053944 W JP 2013053944W WO 2013161358 A1 WO2013161358 A1 WO 2013161358A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/82—Hydraulic or pneumatic circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
Definitions
- the present invention relates to a hydraulic device and an industrial machine.
- a hydraulic device there is one in which a hydraulic pump that supplies hydraulic oil to a molding machine is driven by a servo motor (see, for example, JP 2011-115967 A (Patent Document 1)).
- the discharge flow rate and discharge pressure of the hydraulic pump are controlled by variably controlling the rotation speed of the servo motor, and the drive control for each actuator of the molding machine is performed.
- an object of the present invention is to provide an inexpensive hydraulic device that can control the pressure and flow rate of hydraulic oil by driving a hydraulic pump using an induction motor, and an industrial machine equipped with the hydraulic device.
- the hydraulic device of the present invention is: A hydraulic pump; An induction motor for driving the hydraulic pump; An inverter that outputs a drive signal for rotating the induction motor; And a control device for controlling the inverter device.
- the inverter device is controlled by the control device, the induction motor is rotated by the drive signal output from the inverter device, and the hydraulic pump is driven by the induction motor, so that it is less expensive than an expensive servo motor.
- An inexpensive hydraulic device capable of controlling the pressure and flow rate of hydraulic oil by driving a hydraulic pump using a simple induction motor can be realized.
- the control device controls the inverter device based on the discharge pressure of the hydraulic oil discharged from the hydraulic pump detected by the pressure sensor and the rotation speed of the induction motor detected by the rotation speed sensor.
- the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump can be optimally controlled according to the machine in which the hydraulic device is used.
- the hydraulic pump is a fixed displacement hydraulic pump.
- the hydraulic device is provided.
- the cost of the industrial machine can be reduced by using an inexpensive hydraulic device that can control the pressure and flow rate of the hydraulic oil by driving the hydraulic pump using the induction motor.
- an inexpensive hydraulic device capable of controlling the pressure and flow rate of hydraulic oil by driving a hydraulic pump using an induction motor and an industrial machine equipped with the hydraulic device can be realized. .
- FIG. 1 is a configuration diagram of an injection molding machine as an example of an industrial machine using a hydraulic apparatus according to an embodiment of the present invention.
- FIG. 2 is a block diagram of the main part of the injection molding machine.
- FIG. 1 shows a configuration diagram of an injection molding machine as an example of an industrial machine using a hydraulic apparatus according to an embodiment of the present invention.
- the injection molding machine of this embodiment includes a main machine controller 1, a control device 2, an inverter device 3, an induction motor 4, and a fixed displacement hydraulic pump 5.
- Main machine controller 1 outputs a control signal to inverter device 3.
- the injection molding machine includes a pair of molds 21 and 31, a movable plate 22 to which one mold 21 is attached, a mold clamping cylinder 23 for moving the movable plate 22 back and forth, and a mold clamping cylinder 23.
- the mold clamping device 24 the stationary platen 32 to which the other mold 31 is attached, the heating cylinder 33 whose tip is inserted into the ejection port of the stationary platen 32, and the injection cylinder 34 for moving the heating cylinder 33 forward and backward.
- an injection device 35 to which an injection cylinder 34 is attached.
- the control device 2, the inverter device 3, the induction motor 4, and the hydraulic pump 5 constitute a hydraulic device 10.
- the mold clamping cylinder 23 and the injection cylinder 34 are driven by hydraulic oil supplied from the hydraulic device 10 via the switching valve 6.
- the injection molding machine is provided with a pressure sensor (not shown) for detecting the discharge pressure of the hydraulic pump 5, the cylinder pressure of the clamping cylinder 23, the cylinder pressure of the injection cylinder 34, and the like.
- the hydraulic pump 5 is a hydraulic pump such as a gear pump, a trochoid pump, a vane pump, or a piston pump, and sucks and discharges hydraulic oil from an oil tank 7 (shown in FIG. 2).
- the inverter device 3 includes the induction motor 4 of the hydraulic device 10 based on the discharge pressure of the hydraulic pump 5 of the hydraulic device 10, the cylinder internal pressure of the clamping cylinder 23, the cylinder internal pressure of the injection cylinder 34, and the like. To control the rotation speed. At this time, the inverter device 3 rotates the induction motor 4 according to each operation of the injection molding machine based on a rotation speed signal indicating the rotation speed of the induction motor 4 from an encoder (not shown) for detecting the rotation speed. Rotate at speed.
- FIG. 2 shows a block diagram of the main part of the injection molding machine.
- the control device 2 receives the command signal from the PQ control unit 2a to which the pressure command value and the flow rate command value are input and the PQ control unit 2a, and outputs the control signal to the inverter device 3. And a speed controller 2b.
- the pressure command value and the flow rate command value are output from the main machine controller 1 (shown in FIG. 1).
- the output shaft of the induction motor 4 that is rotationally driven by the inverter device 3 and the input shaft of the hydraulic pump 5 are coupled via a coupling (not shown).
- a pressure sensor 12 is provided on the discharge side of the hydraulic pump 5.
- an encoder 11 as an example of a rotational speed sensor that detects the rotational speed of the induction motor 4 is provided in a coupling that connects the output shaft of the induction motor 4 and the input shaft of the hydraulic pump 5.
- the encoder 11 may be, for example, an optical rotary encoder that includes a disc having a plurality of slits and an optical sensor that detects the presence or absence of slits in a rotating disc, or may be a magnetic rotary encoder or the like. .
- the PQ control unit 2a receives a signal representing the discharge pressure from the pressure sensor 12 and a rotation speed signal from the encoder 11, so that the discharge flow rate of the hydraulic pump 5 becomes a flow command value, and the hydraulic pump 5 A command signal is output to the speed control unit 2b so that the discharge pressure becomes a pressure command value.
- the PQ control unit 2a receives the signal representing the discharge pressure from the pressure sensor 12 and the rotation speed signal from the encoder 11, so that the discharge pressure and the discharge flow rate conform to the pressure flow characteristic set inside.
- a command signal is output to the control unit 2b.
- the speed control unit 2b receives the command signal from the PQ control unit 2a and the rotation speed signal from the encoder 11, and causes the induction motor 4 to rotate at the target rotation speed based on the command signal from the PQ control unit 2a. Then, a control signal is output to the inverter device 3.
- feedforward control is performed using a load torque derived by calculation from a signal representing the discharge pressure from the pressure sensor 12.
- the control device 2 controls the inverter device 3 to rotate the induction motor 4 by the drive signal output from the inverter device 3, and the fixed displacement hydraulic pump 5 is connected to the induction motor 4.
- the control device 2 controls the inverter device 3.
- the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump 5 are optimally controlled according to the injection molding machine in which the hydraulic device 10 is used. be able to.
- the injection molding machine has been described as an industrial machine provided with a hydraulic device.
- the industrial machine is not limited to this, and the present invention is applied to an industrial machine such as a molding machine of another configuration, a press machine, or a machine tool.
- the hydraulic device may be applied.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
A hydraulic device comprising: a hydraulic pump (5); an induction motor (4) that drives the hydraulic pump (5); an inverter device (3) that outputs a drive signal that causes the induction motor (4) to rotate; and a control device (2) that controls the inverter device (3). As a result, an inexpensive hydraulic device (10) capable of driving the hydraulic pump (5) using the induction motor (4) and of controlling the pressure and flow rate of hydraulic oil is provided.
Description
この発明は、油圧装置および産業機械に関する。
The present invention relates to a hydraulic device and an industrial machine.
従来、油圧装置としては、作動油を成形機に供給する油圧ポンプをサーボモータで駆動するものがある(例えば、特開2011-115967号公報(特許文献1)参照)。
Conventionally, as a hydraulic device, there is one in which a hydraulic pump that supplies hydraulic oil to a molding machine is driven by a servo motor (see, for example, JP 2011-115967 A (Patent Document 1)).
上記油圧装置では、サーボモータの回転数を可変制御することにより油圧ポンプの吐出流量および吐出圧力を制御して、成形機の各アクチュエータに対する駆動制御を行う。
In the above hydraulic device, the discharge flow rate and discharge pressure of the hydraulic pump are controlled by variably controlling the rotation speed of the servo motor, and the drive control for each actuator of the molding machine is performed.
しかしながら、上記油圧装置に用いられるサーボモータは、高価であるため、油圧装置の低コスト化を阻む要因となっている。
However, since the servo motor used in the hydraulic device is expensive, it is a factor that hinders cost reduction of the hydraulic device.
そこで、この発明の課題は、誘導モータを用いて油圧ポンプを駆動して作動油の圧力と流量を制御できる安価な油圧装置およびそれを備えた産業機械を提供することにある。
Therefore, an object of the present invention is to provide an inexpensive hydraulic device that can control the pressure and flow rate of hydraulic oil by driving a hydraulic pump using an induction motor, and an industrial machine equipped with the hydraulic device.
上記課題を解決するため、この発明の油圧装置は、
油圧ポンプと、
上記油圧ポンプを駆動する誘導モータと、
上記誘導モータを回転させる駆動信号を出力するインバータ装置と、
上記インバータ装置を制御する制御装置と
を備えたことを特徴とする。 In order to solve the above problems, the hydraulic device of the present invention is:
A hydraulic pump;
An induction motor for driving the hydraulic pump;
An inverter that outputs a drive signal for rotating the induction motor;
And a control device for controlling the inverter device.
油圧ポンプと、
上記油圧ポンプを駆動する誘導モータと、
上記誘導モータを回転させる駆動信号を出力するインバータ装置と、
上記インバータ装置を制御する制御装置と
を備えたことを特徴とする。 In order to solve the above problems, the hydraulic device of the present invention is:
A hydraulic pump;
An induction motor for driving the hydraulic pump;
An inverter that outputs a drive signal for rotating the induction motor;
And a control device for controlling the inverter device.
上記構成によれば、制御装置によりインバータ装置を制御して、インバータ装置から出力された駆動信号により誘導モータを回転させ、油圧ポンプを誘導モータにより駆動することによって、高価なサーボモータに比べて安価な誘導モータを用いて油圧ポンプを駆動して作動油の圧力と流量を制御できる安価な油圧装置を実現できる。
According to the above configuration, the inverter device is controlled by the control device, the induction motor is rotated by the drive signal output from the inverter device, and the hydraulic pump is driven by the induction motor, so that it is less expensive than an expensive servo motor. An inexpensive hydraulic device capable of controlling the pressure and flow rate of hydraulic oil by driving a hydraulic pump using a simple induction motor can be realized.
また、一実施形態の油圧装置では、
上記油圧ポンプの作動油の吐出圧力を検出する圧力センサと、
上記誘導モータの回転速度を検出する回転速度センサと、
を備え、
上記制御装置は、上記圧力センサにより検出された上記油圧ポンプから吐出される作動油の吐出圧力および上記回転速度センサにより検出された上記誘導モータの回転速度に基づいて、上記インバータ装置を制御することにより、上記油圧ポンプから吐出される作動油の圧力と流量を制御する。 Moreover, in the hydraulic device of one embodiment,
A pressure sensor for detecting the discharge pressure of the hydraulic oil of the hydraulic pump;
A rotational speed sensor for detecting the rotational speed of the induction motor;
With
The control device controls the inverter device based on a discharge pressure of hydraulic oil discharged from the hydraulic pump detected by the pressure sensor and a rotation speed of the induction motor detected by the rotation speed sensor. Thus, the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump are controlled.
上記油圧ポンプの作動油の吐出圧力を検出する圧力センサと、
上記誘導モータの回転速度を検出する回転速度センサと、
を備え、
上記制御装置は、上記圧力センサにより検出された上記油圧ポンプから吐出される作動油の吐出圧力および上記回転速度センサにより検出された上記誘導モータの回転速度に基づいて、上記インバータ装置を制御することにより、上記油圧ポンプから吐出される作動油の圧力と流量を制御する。 Moreover, in the hydraulic device of one embodiment,
A pressure sensor for detecting the discharge pressure of the hydraulic oil of the hydraulic pump;
A rotational speed sensor for detecting the rotational speed of the induction motor;
With
The control device controls the inverter device based on a discharge pressure of hydraulic oil discharged from the hydraulic pump detected by the pressure sensor and a rotation speed of the induction motor detected by the rotation speed sensor. Thus, the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump are controlled.
上記実施形態によれば、圧力センサにより検出された油圧ポンプから吐出される作動油の吐出圧力および回転速度センサにより検出された誘導モータの回転速度に基づいて、制御装置によりインバータ装置を制御して、油圧ポンプから吐出される作動油の圧力と流量を制御することによって、この油圧装置が用いられる機械に応じて、油圧ポンプから吐出される作動油の圧力と流量を最適に制御できる。
According to the above embodiment, the control device controls the inverter device based on the discharge pressure of the hydraulic oil discharged from the hydraulic pump detected by the pressure sensor and the rotation speed of the induction motor detected by the rotation speed sensor. By controlling the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump, the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump can be optimally controlled according to the machine in which the hydraulic device is used.
また、一実施形態の油圧装置では、
上記油圧ポンプは、固定容量型の油圧ポンプである。 Moreover, in the hydraulic device of one embodiment,
The hydraulic pump is a fixed displacement hydraulic pump.
上記油圧ポンプは、固定容量型の油圧ポンプである。 Moreover, in the hydraulic device of one embodiment,
The hydraulic pump is a fixed displacement hydraulic pump.
上記実施形態によれば、油圧ポンプの容量制御を行わずに誘導モータの回転速度を制御することによって、油圧ポンプから吐出される作動油の圧力と流量の制御の処理を簡略化できる。
According to the above embodiment, by controlling the rotational speed of the induction motor without performing the capacity control of the hydraulic pump, it is possible to simplify the process of controlling the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump.
また、この発明の産業機械では、
上記の油圧装置を備えたことを特徴とする。 In the industrial machine of the present invention,
The hydraulic device is provided.
上記の油圧装置を備えたことを特徴とする。 In the industrial machine of the present invention,
The hydraulic device is provided.
上記構成によれば、誘導モータを用いて油圧ポンプを駆動して作動油の圧力と流量を制御できる安価な油圧装置を用いることによって、産業機械の低コスト化が図れる。
According to the above configuration, the cost of the industrial machine can be reduced by using an inexpensive hydraulic device that can control the pressure and flow rate of the hydraulic oil by driving the hydraulic pump using the induction motor.
以上より明らかなように、この発明によれば、誘導モータを用いて油圧ポンプを駆動して作動油の圧力と流量を制御できる安価な油圧装置およびそれを備えた産業機械を実現することができる。
As is apparent from the above, according to the present invention, an inexpensive hydraulic device capable of controlling the pressure and flow rate of hydraulic oil by driving a hydraulic pump using an induction motor and an industrial machine equipped with the hydraulic device can be realized. .
以下、この発明の油圧装置および産業機械を図示の実施の形態により詳細に説明する。
Hereinafter, the hydraulic apparatus and the industrial machine of the present invention will be described in detail with reference to the illustrated embodiments.
図1はこの発明の実施の一形態の油圧装置を用いた産業機械の一例としての射出成形機の構成図を示している。
FIG. 1 shows a configuration diagram of an injection molding machine as an example of an industrial machine using a hydraulic apparatus according to an embodiment of the present invention.
この実施の形態の射出成形機は、図1に示すように、主機コントローラ1と、制御装置2と、インバータ装置3と、誘導モータ4と、固定容量型の油圧ポンプ5とを備えている。主機コントローラ1は、インバータ装置3に制御信号を出力する。
As shown in FIG. 1, the injection molding machine of this embodiment includes a main machine controller 1, a control device 2, an inverter device 3, an induction motor 4, and a fixed displacement hydraulic pump 5. Main machine controller 1 outputs a control signal to inverter device 3.
また、上記射出成形機は、一対の金型21,31と、一方の金型21が取り付けられた可動盤22と、可動盤22を前後進させる型締めシリンダ23と、型締めシリンダ23が取り付けられた型締め装置24と、他方の金型31が取り付けられた固定盤32と、固定盤32の射出口に先端部が挿入される加熱シリンダ33と、加熱シリンダ33を前後進させる射出シリンダ34と、射出シリンダ34が取り付けられた射出装置35とを備えている。
The injection molding machine includes a pair of molds 21 and 31, a movable plate 22 to which one mold 21 is attached, a mold clamping cylinder 23 for moving the movable plate 22 back and forth, and a mold clamping cylinder 23. The mold clamping device 24, the stationary platen 32 to which the other mold 31 is attached, the heating cylinder 33 whose tip is inserted into the ejection port of the stationary platen 32, and the injection cylinder 34 for moving the heating cylinder 33 forward and backward. And an injection device 35 to which an injection cylinder 34 is attached.
上記制御装置2とインバータ装置3と誘導モータ4と油圧ポンプ5で油圧装置10を構成している。
The control device 2, the inverter device 3, the induction motor 4, and the hydraulic pump 5 constitute a hydraulic device 10.
上記型締めシリンダ23と射出シリンダ34は、油圧装置10から切換バルブ6を介して供給される作動油により駆動される。
The mold clamping cylinder 23 and the injection cylinder 34 are driven by hydraulic oil supplied from the hydraulic device 10 via the switching valve 6.
なお、上記射出成形機には、油圧ポンプ5の吐出圧、型締めシリンダ23のシリンダ内圧および射出シリンダ34のシリンダ内圧などを検出する圧力センサ(図示せず)を設けている。
The injection molding machine is provided with a pressure sensor (not shown) for detecting the discharge pressure of the hydraulic pump 5, the cylinder pressure of the clamping cylinder 23, the cylinder pressure of the injection cylinder 34, and the like.
また、油圧ポンプ5は、ギアポンプ、トロコイドポンプ、ベーンポンプ、ピストンポンプ等の油圧ポンプであり、作動油を油タンク7(図2に示す)から吸入して吐出する。
The hydraulic pump 5 is a hydraulic pump such as a gear pump, a trochoid pump, a vane pump, or a piston pump, and sucks and discharges hydraulic oil from an oil tank 7 (shown in FIG. 2).
上記構成の射出成形機において、インバータ装置3は、油圧装置10の油圧ポンプ5の吐出圧、型締めシリンダ23のシリンダ内圧および射出シリンダ34のシリンダ内圧などに基づいて、油圧装置10の誘導モータ4の回転速度を制御する。このとき、インバータ装置3は、回転数検出用のエンコーダ(図示せず)からの誘導モータ4の回転速度を表す回転速度信号に基づいて、誘導モータ4を射出成形機の各動作に応じた回転速度で回転させる。
In the injection molding machine configured as described above, the inverter device 3 includes the induction motor 4 of the hydraulic device 10 based on the discharge pressure of the hydraulic pump 5 of the hydraulic device 10, the cylinder internal pressure of the clamping cylinder 23, the cylinder internal pressure of the injection cylinder 34, and the like. To control the rotation speed. At this time, the inverter device 3 rotates the induction motor 4 according to each operation of the injection molding machine based on a rotation speed signal indicating the rotation speed of the induction motor 4 from an encoder (not shown) for detecting the rotation speed. Rotate at speed.
図2は上記射出成形機の要部のブロック図を示している。
FIG. 2 shows a block diagram of the main part of the injection molding machine.
図2に示すように、制御装置2は、圧力指令値と流量指令値が入力されたPQ制御部2aと、PQ制御部2aからの指令信号を受けて、インバータ装置3に制御信号を出力する速度制御部2bとを有する。上記圧力指令値と流量指令値は、主機コントローラ1(図1に示す)から出力される。
As shown in FIG. 2, the control device 2 receives the command signal from the PQ control unit 2a to which the pressure command value and the flow rate command value are input and the PQ control unit 2a, and outputs the control signal to the inverter device 3. And a speed controller 2b. The pressure command value and the flow rate command value are output from the main machine controller 1 (shown in FIG. 1).
また、インバータ装置3により回転駆動される誘導モータ4の出力軸と油圧ポンプ5の入力軸をカップリング(図示せず)を介して連結している。
Further, the output shaft of the induction motor 4 that is rotationally driven by the inverter device 3 and the input shaft of the hydraulic pump 5 are coupled via a coupling (not shown).
また、油圧ポンプ5の吐出側に圧力センサ12を設けている。さらに、誘導モータ4の出力軸と油圧ポンプ5の入力軸を連結するカップリングに、誘導モータ4の回転速度を検出する回転速度センサの一例としてのエンコーダ11を設けている。このエンコーダ11は、例えば複数のスリットを有する円板と、回転する円板のスリットの有無を検出する光センサからなる光学式のロータリーエンコーダでもよいし、磁気式のロータリーエンコーダなどであってもよい。
Further, a pressure sensor 12 is provided on the discharge side of the hydraulic pump 5. Furthermore, an encoder 11 as an example of a rotational speed sensor that detects the rotational speed of the induction motor 4 is provided in a coupling that connects the output shaft of the induction motor 4 and the input shaft of the hydraulic pump 5. The encoder 11 may be, for example, an optical rotary encoder that includes a disc having a plurality of slits and an optical sensor that detects the presence or absence of slits in a rotating disc, or may be a magnetic rotary encoder or the like. .
上記PQ制御部2aは、圧力センサ12からの吐出圧力を表す信号およびエンコーダ11からの回転速度信号を受けて、油圧ポンプ5の吐出流量が流量指令値になるように、かつ、油圧ポンプ5の吐出圧力が圧力指令値になるように、速度制御部2bに指令信号を出力する。または、PQ制御部2aは、圧力センサ12からの吐出圧力を表す信号およびエンコーダ11からの回転速度信号を受けて、内部に設定された圧力流量特性に吐出圧力と吐出流量が沿うように、速度制御部2bに指令信号を出力する。
The PQ control unit 2a receives a signal representing the discharge pressure from the pressure sensor 12 and a rotation speed signal from the encoder 11, so that the discharge flow rate of the hydraulic pump 5 becomes a flow command value, and the hydraulic pump 5 A command signal is output to the speed control unit 2b so that the discharge pressure becomes a pressure command value. Alternatively, the PQ control unit 2a receives the signal representing the discharge pressure from the pressure sensor 12 and the rotation speed signal from the encoder 11, so that the discharge pressure and the discharge flow rate conform to the pressure flow characteristic set inside. A command signal is output to the control unit 2b.
そして、上記速度制御部2bは、PQ制御部2aからの指令信号およびエンコーダ11からの回転速度信号を受けて、PQ制御部2aからの指令信号に基づく目標回転速度で誘導モータ4が回転するように、インバータ装置3に制御信号を出力する。
The speed control unit 2b receives the command signal from the PQ control unit 2a and the rotation speed signal from the encoder 11, and causes the induction motor 4 to rotate at the target rotation speed based on the command signal from the PQ control unit 2a. Then, a control signal is output to the inverter device 3.
なお、速度制御部2bでは、圧力センサ12からの吐出圧力を表す信号から演算によって導き出された負荷トルクを使用したフィードフォワード制御が行われる。
In the speed control unit 2b, feedforward control is performed using a load torque derived by calculation from a signal representing the discharge pressure from the pressure sensor 12.
上記構成の油圧装置10によれば、制御装置2によりインバータ装置3を制御して、インバータ装置3から出力された駆動信号により誘導モータ4を回転させ、固定容量型の油圧ポンプ5を誘導モータ4により駆動することによって、高価なサーボモータに比べて安価な誘導モータ4を用いて油圧ポンプ5を駆動して作動油の圧力と流量を制御できる安価な油圧装置を実現することができる。
According to the hydraulic device 10 configured as described above, the control device 2 controls the inverter device 3 to rotate the induction motor 4 by the drive signal output from the inverter device 3, and the fixed displacement hydraulic pump 5 is connected to the induction motor 4. By driving in accordance with the above, it is possible to realize an inexpensive hydraulic device that can control the pressure and flow rate of hydraulic oil by driving the hydraulic pump 5 using the induction motor 4 that is less expensive than an expensive servomotor.
また、上記圧力センサ12により検出された油圧ポンプ5から吐出される作動油の吐出圧力およびエンコーダ11により検出された誘導モータ4の回転速度に基づいて、制御装置2によりインバータ装置3を制御して、油圧ポンプ5から吐出される作動油の流量を制御することによって、この油圧装置10が用いられる射出成形機に応じて、油圧ポンプ5から吐出される作動油の圧力と流量を最適に制御することができる。
Further, based on the discharge pressure of the hydraulic oil discharged from the hydraulic pump 5 detected by the pressure sensor 12 and the rotational speed of the induction motor 4 detected by the encoder 11, the control device 2 controls the inverter device 3. By controlling the flow rate of the hydraulic oil discharged from the hydraulic pump 5, the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump 5 are optimally controlled according to the injection molding machine in which the hydraulic device 10 is used. be able to.
また、上記油圧ポンプ5の容量制御を行わずに誘導モータ4の回転速度を制御することによって、油圧ポンプ5から吐出される作動油の圧力と流量の制御性が向上する。
Further, by controlling the rotational speed of the induction motor 4 without controlling the capacity of the hydraulic pump 5, the controllability of the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump 5 is improved.
また、上記産業機械としての射出成形機によれば、誘導モータ4を用いて油圧ポンプ5を駆動して作動油の圧力と流量を制御できる安価な油圧装置10を用いることによって、射出成形機の低コスト化が図れる。
Moreover, according to the injection molding machine as the industrial machine, by using the inexpensive hydraulic device 10 that can control the pressure and flow rate of the hydraulic oil by driving the hydraulic pump 5 using the induction motor 4, Cost reduction can be achieved.
上記実施の形態では、油圧装置を備えた産業機械として射出成形機について説明したが、産業機械はこれに限らず、他の構成の成形機や、プレス機、工作機械などの産業機械にこの発明の油圧装置を適用してもよい。
In the above-described embodiment, the injection molding machine has been described as an industrial machine provided with a hydraulic device. However, the industrial machine is not limited to this, and the present invention is applied to an industrial machine such as a molding machine of another configuration, a press machine, or a machine tool. The hydraulic device may be applied.
この発明の具体的な実施の形態について説明したが、この発明は上記実施の形態に限定されるものではなく、この発明の範囲内で種々変更して実施することができる。
Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention.
1…主機コントローラ
2…制御装置
2a…PQ制御部
2b…速度制御部
3…インバータ装置
4…誘導モータ
5…油圧ポンプ
6…切換バルブ
7…油タンク
10…油圧装置
11…エンコーダ
12…圧力センサ
21,31…金型
22…可動盤
23…型締めシリンダ
24…型締め装置
32…固定盤
33…加熱シリンダ
34…射出シリンダ
35…射出装置 DESCRIPTION OF SYMBOLS 1 ... Main-machine controller 2 ... Control apparatus 2a ... PQ control part 2b ... Speed control part 3 ... Inverter apparatus 4 ... Induction motor 5 ... Hydraulic pump 6 ... Switching valve 7 ... Oil tank 10 ... Hydraulic apparatus 11 ... Encoder 12 ... Pressure sensor 21 , 31 ... Mold 22 ... Movable plate 23 ... Clamping cylinder 24 ... Clamping device 32 ... Fixed plate 33 ... Heating cylinder 34 ... Injection cylinder 35 ... Injection device
2…制御装置
2a…PQ制御部
2b…速度制御部
3…インバータ装置
4…誘導モータ
5…油圧ポンプ
6…切換バルブ
7…油タンク
10…油圧装置
11…エンコーダ
12…圧力センサ
21,31…金型
22…可動盤
23…型締めシリンダ
24…型締め装置
32…固定盤
33…加熱シリンダ
34…射出シリンダ
35…射出装置 DESCRIPTION OF SYMBOLS 1 ... Main-
Claims (4)
- 油圧ポンプ(5)と、
上記油圧ポンプ(5)を駆動する誘導モータ(4)と、
上記誘導モータ(4)を回転させる駆動信号を出力するインバータ装置(3)と、
上記インバータ装置(3)を制御する制御装置(2)と
を備えたことを特徴とする油圧装置(10)。 A hydraulic pump (5);
An induction motor (4) for driving the hydraulic pump (5);
An inverter device (3) for outputting a drive signal for rotating the induction motor (4);
A hydraulic device (10) comprising a control device (2) for controlling the inverter device (3). - 請求項1に記載の油圧装置(10)において、
上記油圧ポンプ(5)の作動油の吐出圧力を検出する圧力センサ(12)と、
上記誘導モータ(4)の回転速度を検出する回転速度センサ(11)と、
を備え、
上記制御装置(2)は、上記圧力センサ(12)により検出された上記油圧ポンプ(5)から吐出される作動油の吐出圧力および上記回転速度センサ(11)により検出された上記誘導モータ(4)の回転速度に基づいて、上記インバータ装置(3)を制御することにより、上記油圧ポンプ(5)から吐出される作動油の圧力と流量を制御することを特徴とする油圧装置(10)。 The hydraulic device (10) according to claim 1,
A pressure sensor (12) for detecting the discharge pressure of the hydraulic oil of the hydraulic pump (5);
A rotational speed sensor (11) for detecting the rotational speed of the induction motor (4);
With
The control device (2) includes a discharge pressure of hydraulic oil discharged from the hydraulic pump (5) detected by the pressure sensor (12) and the induction motor (4) detected by the rotational speed sensor (11). The hydraulic device (10) is characterized in that the pressure and flow rate of the hydraulic oil discharged from the hydraulic pump (5) is controlled by controlling the inverter device (3) based on the rotation speed of the hydraulic pump. - 請求項1または2に記載の油圧装置(10)において、
上記油圧ポンプ(5)は、固定容量型の油圧ポンプであることを特徴とする油圧装置(10)。 The hydraulic device (10) according to claim 1 or 2,
The hydraulic pump (5) is a fixed displacement hydraulic pump (10). - 請求項1から3までのいずれか1つに記載の油圧装置(10)を備えたことを特徴とする産業機械。 Industrial machine comprising the hydraulic device (10) according to any one of claims 1 to 3.
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JP2012103662A JP2013231389A (en) | 2012-04-27 | 2012-04-27 | Hydraulic device and industrial machine |
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JP (1) | JP2013231389A (en) |
CN (2) | CN103375393A (en) |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001090668A (en) * | 1999-09-24 | 2001-04-03 | Daikin Ind Ltd | Hydraulic device |
JP2001206663A (en) * | 2000-01-21 | 2001-07-31 | Hitachi Ltd | Hydraulic elevator |
JP2001263254A (en) * | 2000-03-17 | 2001-09-26 | Tokimec Inc | Hydraulic device |
JP2012062772A (en) * | 2010-09-14 | 2012-03-29 | Daikin Industries Ltd | Hydraulic pressure device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63309789A (en) * | 1987-06-12 | 1988-12-16 | Hitachi Constr Mach Co Ltd | Control device for plural hydraulic pump |
JP4635282B2 (en) * | 1999-09-24 | 2011-02-23 | ダイキン工業株式会社 | Autonomous inverter drive hydraulic unit |
-
2012
- 2012-04-27 JP JP2012103662A patent/JP2013231389A/en active Pending
-
2013
- 2013-02-19 WO PCT/JP2013/053944 patent/WO2013161358A1/en active Application Filing
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001090668A (en) * | 1999-09-24 | 2001-04-03 | Daikin Ind Ltd | Hydraulic device |
JP2001206663A (en) * | 2000-01-21 | 2001-07-31 | Hitachi Ltd | Hydraulic elevator |
JP2001263254A (en) * | 2000-03-17 | 2001-09-26 | Tokimec Inc | Hydraulic device |
JP2012062772A (en) * | 2010-09-14 | 2012-03-29 | Daikin Industries Ltd | Hydraulic pressure device |
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TW201344066A (en) | 2013-11-01 |
JP2013231389A (en) | 2013-11-14 |
CN103375393A (en) | 2013-10-30 |
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