WO2008001530A1 - Presse - Google Patents

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Publication number
WO2008001530A1
WO2008001530A1 PCT/JP2007/057747 JP2007057747W WO2008001530A1 WO 2008001530 A1 WO2008001530 A1 WO 2008001530A1 JP 2007057747 W JP2007057747 W JP 2007057747W WO 2008001530 A1 WO2008001530 A1 WO 2008001530A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
die cushion
slide
die
motor
Prior art date
Application number
PCT/JP2007/057747
Other languages
English (en)
Japanese (ja)
Inventor
Motonao Niizuma
Hiroaki Kuwano
Original Assignee
Ihi Corporation
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 Ihi Corporation filed Critical Ihi Corporation
Publication of WO2008001530A1 publication Critical patent/WO2008001530A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/14—Control arrangements for mechanically-driven presses
    • B30B15/148—Electrical control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies

Definitions

  • the present invention relates to a press machine. More specifically, the present invention relates to a press machine having a die cushion for performing wrinkle pressing of a force-receiving object during press caking.
  • the press machine drives the slide up and down, and when the slide descends, presses the workpiece between the upper die fixed to the lower surface of the slide and the lower die placed below the upper die. .
  • FIG. 1 shows a configuration example of a press machine.
  • the press machine 40 in Fig. 1 includes a motor 41, a flywheel 47 that accumulates the rotational energy of the motor 41, and a shelf structure 53 that converts the rotary motion of the motor 41 into a lift motion (in Fig. 1, the crankshaft). And a slide 57 connected to the crankshaft 53 and moving up and down. When the slide 57 is lowered, a pressed object is sandwiched between the upper mold fixed to the lower surface of the slide 57 and the lower mold arranged below the upper mold.
  • the pulley 43 and the transmission belt 45 transmit the rotational driving force of the motor 41 to the flywheel 47.
  • the rotational energy of the flywheel 47 is transmitted to the main gear 51 via the clutch 48 and the gear 49.
  • a crankshaft 53 is connected to the main gear 51.
  • a servo motor type press machine using a flywheel has also been proposed.
  • This servo motor type press machine has the advantages of eliminating the flywheel, clutch, etc., making it smaller and lighter, so the energy required for pressing cannot be stored in the flywheel, so it is supplied to the servo motor
  • the power to be generated must be increased. Therefore, the AC power supply equipment in the factory must have a large capacity, and the power supply equipment becomes large.
  • Patent Document 1 In this technology, power is stored in a capacitor, and a part of the power to the servo motor required for pressing is supplied to the capacitor!
  • Patent Document 2 As a prior art document of the present application, there is the following Patent Document 2.
  • the technology of Patent Document 2 also regenerates energy by the impact force force during pressing. Specifically, the die cushion is supported by hydraulic pressure, and the hydraulic motor is rotated using the generated oil flow while absorbing the impact force during pressing by the accumulator for pressure oil accumulation. Electric power is regenerated by a servo motor driven by this hydraulic motor.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 2003-290998 “Press Machine and Press Machine System”
  • Patent Document 2 Japanese Patent No. 3707061 “Press Cushion Device”
  • Patent Document 1 there is a problem because a large-capacitance capacitor is provided.
  • a space for a large-capacity capacitor is required.
  • electrolytic capacitors normally used as large-capacity capacitors are likely to deteriorate in performance over time and require maintenance.
  • a space for providing a discharge circuit for discharging a capacitor in which electric power is stored at an appropriate timing is also required.
  • Patent Document 2 does not solve the problem of increasing the size of an AC power supply facility.
  • an object of the present invention is to provide a press machine that can supply a large amount of electric power required for pressing to a drive motor while using a small power supply facility without using a power storage device such as a capacitor. .
  • a drive motor for performing pressing, a first modification for converting the rotational movement of the drive motor into a reciprocating movement, and the first modification are coupled to the first modification.
  • a press machine comprising: a reciprocating slide; and a die cushion that moves by receiving the mold force load while a work piece is sandwiched between the die attached to the slide.
  • a press machine comprising: an energy conversion device that movably supports a cushion and generates electric power by the load; and an electric power line that supplies the electric power to the drive motor.
  • the force can also reduce the power supplied to the drive motor.
  • the energy conversion device can generate a large electric power. Therefore, the power supplied from the power supply facility to the drive motor can be greatly reduced, and the power supply facility can be downsized.
  • the power generated by the energy conversion device is immediately supplied to the drive motor through the power line during the press period in which the die cushion receives the load.
  • the press machine is configured as follows.
  • the energy conversion device can generate a large amount of electric power during the press period, the required supply power to the drive motor is the largest during the same press period. In this way, the timing at which large power can be generated coincides with the timing at which the required supply power to the drive motor is maximized. Therefore, in the above embodiment, using the coincidence of timing, large electric power generated by the energy conversion device in the press period is immediately supplied to the drive motor through the electric power line. As a result, the maximum value of power supplied from the power supply equipment to the drive motor can be greatly reduced. Therefore, the power supply facility can be reduced in size accordingly.
  • the energy conversion device is configured to push a die cushion toward the mold when power is supplied, and the die cushion receives the load.
  • a power supply device for supplying power to the energy conversion device during the press period.
  • the energy conversion device can have both a function of acting the die cushion and a function as a power supply source for the drive motor.
  • the energy conversion device includes a second conversion mechanism connected to the die cushion, an electric motor capable of generating electricity, the output shaft of which is connected to the second conversion mechanism,
  • the second conversion mechanism is configured to convert the linear motion of the die cushion into the rotational motion of the electric motor, and to convert the rotational motion of the electric motor into the linear motion of the die cushion.
  • the power supply device is Electric power is supplied to the electric motor.
  • the electric motor is supplied with electric power and pushes the dictation toward the mold, so that the die cushion is pushed back and lowered by the load from the mold, The motor generates a large torque. Therefore, large electric power is generated by the electric motor.
  • FIG. 1 is a diagram showing a configuration example of a conventional press machine.
  • FIG. 2 is a configuration diagram of a press machine according to an embodiment of the present invention.
  • FIG. 3 is an explanatory view of the operation of the press machine of FIG.
  • FIG. 2 shows a configuration of the press machine 10 according to the embodiment of the present invention.
  • the press machine 10 includes a first servo motor 3 for performing pressing, a first modification 5 for converting the rotational movement of the first servo motor 3 into a lifting movement, and a first modification 5. Is moved by receiving a load from the upper mold 9 with the workpiece 1 (for example, a plate) sandwiched between the slide 7 connected to the slide 7 and the upper mold 9 attached to the slide 7. Die cushions 8a and 8b.
  • the workpiece 1 for example, a plate
  • the press machine 10 further includes a converter 11, a DC bus 12, and a slide drive inverter 1
  • Converter 11 receives power from AC power supply facility 23 installed in a factory or the like through AC power supply line 24.
  • the converter 11 has a rectifier circuit that also includes a diode force. It converts AC from the AC power supply facility 23 into DC and supplies DC power to the DC bus 12.
  • the DC bus 12 electrically connects the converter 11, the slide drive inverter 15 and the die cushion drive inverters 17a and 17b. Accordingly, the DC power from the converter 11 is supplied to the slide drive inverter 15 and the die cushion drive inverters 17a and 17b via the DC bus 12.
  • the slide drive inverter 15 is an IGBT (Insulated Gate Bipolar Transistor) or GTO.
  • the first variable shelf structure 5 is connected to the output shaft of the first servo motor 3 and the slide 7, and converts the rotational movement of the first servo motor 3 into the up-and-down movement to raise and lower the slide 7.
  • the configuration of the first variation 5 may be an appropriate one that converts the rotational motion of the first servomotor 3 into the reciprocating motion of the slide 7.
  • the configuration of the first variable shelf structure 5 may be a configuration in which a reduction gear, a crankshaft, and a link have equal force, a configuration in which the reduction gear, an eccentric wheel, and a link have an equal force, or a configuration that includes a ball screw.
  • the slide controller 19 receives the slide position signal from the slide position measuring device 27, thereby grasping the ascending / descending position of the slide 7 every moment.
  • the slide controller 19 calculates the slide drive torque command value from moment to moment so that the slide 7 moves according to the motion pattern pre-stored in its storage unit or the motion pattern set by the operator's button operation, etc. Then output.
  • feedback calculation such as PID control or feedforward control can be used.
  • the slide position measuring device 27 has an appropriate configuration capable of detecting the lift position of the slide 7.
  • the slide position measuring device 27 may be a linear encoder that uses the magnetostriction effect and the propagation time of ultrasonic waves, or a linear scale that reads a monochrome pattern with a photo sensor.
  • the die cushion drive inverters 17a and 17b have power control elements such as IGBT and GTO as constituent elements, and are based on the die cushion drive torque command values from the die cushion controllers 33a and 33b.
  • the current flowing through the second servomotors 2 la and 2 lb through the connections 29a and 29b and the applied voltage are controlled. Thereby, torque according to the die cushion drive torque command value is generated in the second servo motors 21a and 21b.
  • the second modification 31a, 31b is connected to the output shaft of the second servo motor 21a, 21b and the die cushion 8a, 8b, and the rotary motion of the second servo motor 21a, 21b is changed to the up / down motion. Convert and raise and lower the die cushions 8a and 8b.
  • the configuration of the second variation 3 la, 3 lb may be appropriate for converting the rotational motion of the servo motor into the reciprocating motion of the die cushions 8a, 8b.
  • the configuration of the second variations 31a and 31b may be a configuration with a ball screw force or a configuration with a rack / peon force.
  • the die cushion controllers 33a and 33b receive the slide position signal from the slide position measuring device 27, thereby grasping the lift position of the slide 7 every moment.
  • the die cushion controllers 33a and 33b are used to drive the die cushion drive torque so that the die cushions 8a and 8b move according to the motion patterns stored in advance in the storage unit and the motion patterns set by the operator's button operations.
  • the command value is calculated and output every moment.
  • feedback calculation such as PID control and feed forward control can be performed.
  • the multiple die cushion controllers 33a and 33b may calculate the same die cushion drive torque command value using the same motion pattern, or may calculate different die cushion drive torque values using different motion patterns. Good
  • An upper mold 9 is fixed to the slide 7 using bolts or a die clamper, and the slide 7 and the upper mold 9 are moved up and down integrally.
  • a lower mold 14 is fixed to a bolster 16 using bolts or a die clamper at a position facing the upper mold 9, and the bolster 16 is supported by a bed 18.
  • the bed 18 is fixed so as not to move, and the bolster 16 supported by the bed 18 and the lower mold 14 fixed to the bolster 16 also do not move.
  • the die cushions 8 a and 8 b are provided so as to surround the lower mold 14.
  • the pressed object 1 to be pressed is inserted between the upper mold 9 and the lower mold 14.
  • the first servo motor 3 lowers the slide 7 via the first deformation mechanism 5 and the upper mold 9 contacts the dies 8a and 8b
  • Servo motor 21a, 21b rotational force is applied to second cushion 31a, 3 lb through upward force applied to die cushion 8a, 8b
  • peripheral edge of object 1 is It is sandwiched between the mold 9 and the die cushions 8a and 8b.
  • the slide 7 continues to descend while the upper die 9 and the die cushions 8a, 8b are in contact with each other, the workpiece 1 is pressed against the lower die 14, and press force is applied.
  • the first servo motor 3 is rotated so as to raise the slide 7, and the pressed object 1 is taken out when the pressing force is completed.
  • FIG. 3 (A) represents the ascending / descending speed of the slide 7 with respect to time
  • (B) in FIG. 3 represents the torque of the first servo motor 3 with respect to time
  • (C) in FIG. 3 represents the second servo motor 21 with respect to time
  • Fig. 3 (D) shows the power required by the first servo motor 3 with respect to time
  • Fig. 3 (E) shows the torque of the second servo motors 21a and 21b with respect to time. It represents the required power.
  • Slide 7 is further lowered, and when a press period in which pressing is performed with the object 1 being sandwiched between the upper die 9 and the die cushions 8a and 8b, the slide 7 is moved first.
  • the power supplied from the DC nose 12 to the slide drive inverter 15 increases (see (D) in FIG. 3).
  • the die cushions 8a and 8b are moved together with the upper mold 9 while holding the object 1 to be driven.
  • the force that descends when pushed by Ride 7 In order to hold down wrinkle of object 1, the second servomotors 21a and 21b have a large current and electric current so that the die cushions 8a and 8b are pushed toward the slide 7.
  • This power is immediately supplied from the die cushion drive inverters 17a and 17b to the slide drive inverter 15 via the DC bus 12 (see arrows from (E) in FIG. 3 to (D) in FIG. 3). . Therefore, the AC power supply 23 and the converter 11 are used for the slide drive by subtracting the power regenerated by the second servomotors 21a and 21b from the power required by the first servomotor 3 during the press period. It may be supplied to the inverter 15. As a result, the AC power supply facility 23 can be reduced in capacity.
  • the second conversion mechanisms 31a and 31b and the second servo motors 21a and 21b generate electric power due to the load received by the die cushions 8a and 8b from the upper mold 9 attached to the slide 7. Since electric power is supplied to the first servo motor 3, the power supplied to the first servo motor 3 can also be reduced by the corresponding amount of power from the AC power supply facility 23 during pressing.
  • the second servomotors 21a and 21b can generate large electric power because the load applied to the dies 8a and 8b from the upper die 9 is large.
  • the second servo motors 2 la and 21 b are supplied with electric power and push the die cushions 8 a and 8 b toward the upper mold 9.
  • the first servo motor 3 generates a large torque while being lowered by being pushed back. For this reason, the second servomotor 21a, 21b Power can be generated.
  • the power supplied from the AC power supply facility 23 to the first servomotor 3 during pressing can be greatly reduced, and the AC power supply facility 23 can be downsized.
  • the apparatus does not increase in size and complexity.
  • the required power supply to the first servomotor 3 is the largest during the same press period. In this way, the timing at which large electric power can be generated coincides with the timing at which the required supply power to the first servo motor 3 is maximized. Therefore, in the embodiment described above, the large electric power generated by the second servomotors 21a and 21b during the press period is immediately supplied to the first servomotor 3 by using this coincidence of timings. As a result, the maximum value of the electric power supplied from the AC power supply facility 23 to the first servo motor 3 can be greatly reduced. Therefore, the AC power supply equipment 23 can be reduced in size accordingly.
  • the second variation 31a, 31b and the second servo motors 21a, 21b are a function for operating the die cushions 8a, 8b and a function as a power supply source for the first servo motor 3. Can be combined.
  • the first servo motor 3 may be a force, which is an example of a drive motor for performing pressing, or another suitable motor as the drive motor.
  • first servo motor 3 instead of the first servo motor 3, a linear servo motor may be used as the drive motor.
  • first shelf structure 5 can be simplified or omitted.
  • the second servo motors 21a, 21b and the second variable structures 31a, 31b support the die cushions 8a, 8b so as to be movable, and generate electric power by the load received by the die cushions 8a, 8b from the mold. Configure the energy conversion device, but configure the energy conversion device with another suitable one.
  • the second servo motors 21a and 21b are used as electric motors capable of generating electricity.
  • Other suitable motors can be used as electric motors that can generate electricity!
  • a linear servo motor may be used as the energy conversion device.
  • the energy conversion device supports and lifts the die cushions 8a and 8b with hydraulic pressure (for example, hydraulic pressure), and generates fluid flow power generated at this time by a fluid motor (for example, hydraulic motor). It may be a device.
  • a motor capable of generating linear motion is used as the energy conversion device, the second variable supporting structures 31a and 31b can be simplified or omitted.
  • the second servo motor connections 29a and 29b, part of the die cushion drive inverters 17a and 17b, the DC bus 12, part of the slide drive inverter 15 and the first servo motor connection 25 As a result, a power line for supplying the power generated by the second servo motors 21a and 21b to the first servo motor 3 is configured, but the power line may be configured with other appropriate ones.
  • the slide drive inverter 15 and the die cushion drive inverters 17a and 17b are each integrated with a converter capable of regenerating power, or the first servo motor 3 and the second servo motors 21a and 21b. Further, it is possible to adopt a configuration in which the slide drive inverter 15 and the dichroic drive inverters 17a and 17b are used as a DC motor and a thyristor Leonard type regeneration mechanism. In these cases, it is possible to omit the converter 11 and connect the slide drive inverter 15 and the die cushion drive inverters 17a and 17b not by the DC bus 12 but by the AC bus.
  • the die cushion drive inverters 17a and 17b constitute a power supply device, other suitable devices may constitute the power supply device! /.
  • the power regeneration type converter 11 is used to start the second servomotors 21a and 2lb.
  • Power to the AC power supply facility 23 a power storage device such as a capacitor connected to the DC nose 12 to temporarily store the power, or a brake resistor added to convert excess power into heat A consuming configuration can be employed.
  • the die cushion drive inverters 17a and 17b, the second servo motors 21a and 21b, the second variable shelf structures 31a and 31b, and the dicks 3n 8a and 8b are provided in two, respectively. One of these may be provided, or three or more may be provided. [0054] Unlike the above embodiment, either or both of the first servo motor 3 and the first conversion mechanism 5 may be provided.
  • a sensor other than the above-described slide position measuring device 27 may be used as a sensor for feedback control of the first servo motor 3 and the second servo motors 21a and 21b. That is, a means capable of directly or indirectly detecting the position and speed of the slide 7 can be used. For example, a method of measuring the motor rotation angle with an encoder and applying a conversion formula based on the machine structure to this, or a method of estimating the motor rotation angle with an observer and applying a conversion formula based on the machine structure, etc. It may be a means to do. Further, it may be a means using a method of calculating a position by measuring a speed and integrating it over time.
  • the die cushion controllers 33a and 33b As a method for the die cushion controllers 33a and 33b to output the die cushion drive torque command value, a method for always outputting a constant die cushion drive torque command value without using the slide position, or a slide 7 As a result of pressing the die cushion 8a, 8b, the slide position and speed are estimated based on the current and voltage generated in the second servomotors 21a, 21b, and the die cushion drive torque command value is estimated based on the estimated value. You can also use the output method.
  • the press machine of the present invention may be applied to a press machine having a flywheel and a clutch brake mechanism. Also in this case, similarly to the above-described embodiment, since the regenerative power can be supplied during the press period in which the required power of the drive motor that drives the slide 7 is maximized, the AC power supply equipment 23 and the converter 11 can be downsized. it can. Thus, the present invention may be applied to a press machine of a different type from the above-described embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

L'invention concerne une presse (10) entraînée par un moteur d'entraînement (10); un premier mécanisme de conversion (5) servant à transformer le mouvement de rotation du moteur d'entraînement (3) en un mouvement de va-et-vient; une coulisse (7) couplée au premier mécanisme de conversion (5) pour l'obtention du mouvement de va-et-vient; un coussin (8a, 8b) de serre-flan mis en mouvement lorsqu'il est sollicité par un serre-flan (9) fixé à la coulisse (7), une pièce d'usinage (1) étant prise en sandwich entre le coussin de serre-flan et le serre-flan (9); un dispositif de conversion d'énergie (21a, 21b, 31a, 31b) soutenant de façon mobile le coussin (8a, 8b) de serre-flan et générant de l'énergie électrique sous l'effet de la sollicitation; et une ligne électrique (12) alimentant le moteur d'entraînement (3) en énergie électrique.
PCT/JP2007/057747 2006-06-28 2007-04-06 Presse WO2008001530A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-178679 2006-06-28
JP2006178679A JP2008006459A (ja) 2006-06-28 2006-06-28 プレス機械

Publications (1)

Publication Number Publication Date
WO2008001530A1 true WO2008001530A1 (fr) 2008-01-03

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Application Number Title Priority Date Filing Date
PCT/JP2007/057747 WO2008001530A1 (fr) 2006-06-28 2007-04-06 Presse

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JP (1) JP2008006459A (fr)
WO (1) WO2008001530A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116727542A (zh) * 2023-07-10 2023-09-12 济南二机床集团有限公司 一种具有能量可回收功能的模具缓冲装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5274171B2 (ja) * 2008-09-17 2013-08-28 アイダエンジニアリング株式会社 ダイクッション装置を具備するサーボプレス
JP5413795B2 (ja) * 2008-09-29 2014-02-12 株式会社Ｉｈｉ プレス機械
CN102555131B (zh) * 2012-02-24 2014-04-23 西安交通大学 一种纤维增强树脂基复合材料板热冲压成形装置及方法
US10529941B2 (en) 2017-06-22 2020-01-07 Joled Inc. Organic electroluminescent element, organic electroluminescent unit, and electronic apparatus
JP7381294B2 (ja) 2019-10-30 2023-11-15 ファナック株式会社 ダイクッション上の被加工物を加工する加工機械の制御装置
KR102500950B1 (ko) 2020-11-05 2023-02-17 한국자동차연구원 프레스 장치의 에너지 회생 시스템 및 이를 포함하는 프레스 장치

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Publication number Priority date Publication date Assignee Title
JP2006060935A (ja) * 2004-08-20 2006-03-02 Fanuc Ltd サーボモータ駆動装置及びサーボモータの駆動方法
JP2006142357A (ja) * 2004-11-22 2006-06-08 Fanuc Ltd ダイクッション駆動装置

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Publication number Priority date Publication date Assignee Title
JP2004276028A (ja) * 2003-01-21 2004-10-07 Hoden Seimitsu Kako Kenkyusho Ltd プレス加工機

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2006060935A (ja) * 2004-08-20 2006-03-02 Fanuc Ltd サーボモータ駆動装置及びサーボモータの駆動方法
JP2006142357A (ja) * 2004-11-22 2006-06-08 Fanuc Ltd ダイクッション駆動装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116727542A (zh) * 2023-07-10 2023-09-12 济南二机床集团有限公司 一种具有能量可回收功能的模具缓冲装置
CN116727542B (zh) * 2023-07-10 2024-02-09 济南二机床集团有限公司 一种具有能量可回收功能的模具缓冲装置

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