JP2018114525A - Forging press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forging press device capable of avoiding an enlargement of a power supply part of a knock-out part, while shortening an operation time of the knock-out part.SOLUTION: This forging press device comprises a slide for advancing-retreating a metal mold, an eccentric shaft for advancing-retreating the slide by rotating, a transmission shaft relatively rotatable with the eccentric shaft by penetrating through the inside of the eccentric shaft, a driving mechanism for rotating the transmission shaft, a reduction gear for transmitting to the eccentric shaft by decelerating rotation of the transmission shaft, a knock-out part for projecting a molding object after molding from the metal mold, and an energy recovery part connected to the transmission shaft and supplying energy to the knock-out part by recovering the energy of the rotation of the transmission shaft.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a forging press apparatus.

  Some forging press apparatuses include a knockout portion that protrudes a forged workpiece from a mold (see, for example, Patent Document 1). In addition, there is a system in which a forging press apparatus and a conveying apparatus cooperate to perform molding from molding to conveyance. In such a system, when the forging press device forges the workpiece, the knockout portion projects the workpiece from the mold, and the projected workpiece is transported by the transport device.

JP 2010-207857 A

  The operation of one cycle of the forging press includes a process in which the knockout unit protrudes the molding object from the mold and moves the molding object to a position where the conveyance apparatus can hold it. In order to improve the production efficiency of the forged product, it is required to shorten the operation time of the knockout portion in addition to the shortening of the time of other processes.

  The knockout portion requires a relatively large force to protrude the forged molded product from the mold, and further requires a stroke for moving the molded product to a position where the conveying device can hold it. For this reason, in order to shorten the operation time of the knockout unit, it is necessary to greatly increase the capacity of the power supply unit of the knockout unit. The power supply unit corresponds to a hydraulic unit that supplies hydraulic pressure if it is a hydraulic knockout unit, and corresponds to a power supply board if it is an electric knockout unit. When the capacity of the power supply unit is greatly increased, the size of the power supply unit increases, which causes a problem that it is difficult to secure a space for installing the power supply unit.

  An object of this invention is to provide the forge press apparatus which can avoid the enlargement of the power supply part of a knockout part, shortening the operation time of a knockout part.

The forging press apparatus according to the present invention is:
A slide to move the mold forward and backward,
An eccentric shaft that advances and retracts the slide by rotating; and
A transmission shaft that penetrates the interior of the eccentric shaft and is rotatable relative to the eccentric shaft;
A drive mechanism for rotating the transmission shaft;
A speed reducer that decelerates the rotation of the transmission shaft and transmits it to the eccentric shaft;
A knockout portion for projecting a molded article after molding from the mold, and
An energy recovery unit that is connected to the transmission shaft, recovers energy of rotation of the transmission shaft, and supplies the energy to the knockout unit;
It was set as the structure provided with.

  ADVANTAGE OF THE INVENTION According to this invention, the enlargement of the power supply part of a knockout part can be avoided, aiming at shortening of the operation time of a knockout part.

It is a lineblock diagram showing the forge press device concerning a 1st embodiment of the present invention. It is a figure which shows a detailed example of a hydraulic circuit part. It is a time chart which shows operation | movement of each part of the forge press apparatus of 1st Embodiment. It is a figure which shows an example of the electric circuit part in the forge press apparatus which concerns on 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a configuration diagram illustrating a forging press apparatus according to a first embodiment of the present invention.

  As shown in FIG. 1, the forging press device 1 according to the first embodiment includes a crown 21, an upright 22, a bed 23, a slide 18, a guide 19, and a bolster 24. A lower mold 32 is fixed to the upper part of the bolster 24. An upper mold 31 is fixed to the lower part of the slide 18.

  The crown 21, the upright 22, and the bed 23 are frame portions that support the drive units of the forging press apparatus 1. The crown 21, the upright 22, and the bed 23 are fastened to each other by inserting a tie rod 25a therein and tightening the tie rod nut 25b.

  The bolster 24 is fixed to the bed 23. The slide 18 is guided by a guide 19 so as to be able to advance and retract in the vertical direction, for example. The guide 19 is supported by a frame portion such as the upright 22. As the slide 18 descends, the upper mold 31 and the lower mold 32 come close to each other, and the object to be molded can be forged between them. Although the direction in which the slide 18 advances and retreats is not particularly limited, the following description will be made assuming that the slide 18 advances and retreats in the vertical direction.

  A conveying device 40 is provided in the vicinity of the forging press device 1. The conveyance device 40 may also be called a transfer feeder. After the molding of the molding object, after the upper mold 31 and the lower mold 32 are separated from each other, the conveying device 40 conveys the molding object.

<Power transmission mechanism>
The forging press apparatus 1 includes a motor 11, a flywheel 12, a clutch brake 13, a transmission shaft 14, a reduction gear 15, an eccentric shaft 16, a connecting rod 17, and a control unit 2 as a configuration for moving the slide 18 up and down. Among these, the motor 11, the flywheel 12, and the clutch brake 13 correspond to an example of a drive mechanism according to the present invention.

  The motor 11 is fixed to a frame portion such as a crown 21. The eccentric shaft 16 is supported by a frame portion such as the crown 21 or the upright 22 through a bearing 41 so that the main shaft portion 16a is rotatable. The clutch brake 13 and the speed reducer 15 are supported by a frame portion such as the crown 21 or the upright 22 via a frame member.

  The motor 11 is an induction motor, for example, and generates power for moving the slide 18 up and down. The power of the motor 11 is transmitted to the flywheel 12 through the belt 11a, for example, and the flywheel 12 is rotated.

  The clutch brake 13 can intermittently connect the flywheel 12 and the transmission shaft 14. When these are connected, the rotational motion of the flywheel 12 is transmitted to the transmission shaft 14. Further, the clutch brake 13 intermittently connects the transmission shaft 14 and the fixed portion. The fixed portion is, for example, a frame portion such as the upright 22 or a member fixed to the frame portion.

  The eccentric shaft 16 has a hollow portion that penetrates along the rotation center axis. The transmission shaft 14 is disposed so as to be rotatable relative to the eccentric shaft 16 in the hollow portion. The transmission shaft 14 transmits the rotational motion of the flywheel 12 to the speed reducer 15. The reducer 15 decelerates the rotational motion of the transmission shaft 14 and transmits it to the eccentric shaft 16.

  The eccentric shaft 16 has an eccentric portion 16 b that is eccentric with respect to the main shaft portion 16 a, and the eccentric portion 16 b is connected to the connecting rod 17. The connecting rod 17 connects the eccentric shaft 16 and the slide 18, converts the rotational motion of the eccentric shaft 16 into a linear motion, and transmits the linear motion to the slide 18.

  Since the eccentric shaft 16 is configured to rotate once in one cycle of the forging press, the rotational speed is low. On the other hand, in this embodiment, by having the transmission shaft 14 and the speed reducer 15, the rotational speeds of the motor 11 and the flywheel 12 can be increased as compared with the configuration in which the flywheel and the eccentric shaft are directly connected. . Thereby, the driving | operation of the efficient forge press apparatus 1 is attained.

  The control unit 2 controls driving and stopping of the motor 11 and intermittent control of the clutch brake 13. The flywheel 12 is rotationally driven by driving the motor 11 under the control of the control unit 2. Further, when the clutch brake 13 connects the flywheel 12 and the transmission shaft 14 under the control of the control unit 2, the movement is transmitted to the transmission shaft 14, the speed reducer 15, the eccentric shaft 16 and the connecting rod 17, and the slide 18 moves up and down. . Further, when the clutch brake 13 connects the transmission shaft 14 to the fixed portion under the control of the control unit 2, the rotation of the transmission shaft 14 is braked, and this braking force is transmitted to the speed reducer 15 and the eccentric shaft 16 to slide 18. Ascending and descending is braked.

<Knockout section>
The forging press apparatus 1 further includes a knockout unit 51, a hydraulic circuit unit 52, and an energy recovery unit 53.

  Knockout portion 51 includes a knockout pin 51a that can move from the inner surface of lower die 32 into the die, and a hydraulic cylinder 51b that drives knockout pin 51a. The hydraulic cylinder 51b is supported by the bed 23 and is driven by hydraulic pressure. When the hydraulic cylinder 51b is driven, the knockout pin 51a protrudes the molded object after molding from the lower mold 32 and raises it to a position where the transport device 40 can grip it.

  FIG. 2 is a diagram illustrating a detailed example of the hydraulic circuit. In FIG. 2, the main body 1A of the forging press apparatus 1 is shown in a simplified manner. The hydraulic cylinder 51b is drawn separately from the main body 1A. The main body 1 </ b> A refers to a portion excluding the hydraulic circuit from the forging press apparatus 1.

  The hydraulic circuit for driving the knockout unit 51 includes a hydraulic cylinder 51b, a hydraulic circuit unit 52, an energy recovery unit 53, and a tank 54, as shown in FIGS. As shown in FIG. 2, the hydraulic circuit unit 52 includes a pressure accumulating unit 71, a hydraulic unit 72, and a control valve 73.

  The energy recovery unit 53 includes a pump 53 a connected to the transmission shaft 14. As the transmission shaft 14 rotates, the rotating portion of the pump 53a rotates and feeds hydraulic oil from the tank 54. When a load is applied to the hydraulic oil delivered from the pump 53a, the pump 53a recovers energy from the transmission shaft 14 and a braking force is applied from the pump 53a to the transmission shaft 14. On the other hand, when no load is applied to the hydraulic oil delivered from the pump 53a, the pump 53a does not recover energy from the transmission shaft 14, and the transmission shaft 14 can rotate without receiving a large resistance from the pump 53a.

  The pressure accumulating unit 71 includes a recovery valve 711, a check valve 712, an accumulator 713, and a discharge valve 714. The pressure accumulating unit 71 can accumulate pressure by pressurizing the hydraulic oil with the energy recovered by the energy recovery unit 53. The pressure accumulating unit 71 may include a safety valve such as a relief valve in the upstream portion of the check valve 712.

  The recovery valve 711 switches between a loaded state in which the hydraulic oil delivered from the pump 53 a is sent to the check valve 712 side and a no-load state in which the hydraulic oil is sent to the tank 715. By this switching, the state of the energy recovery unit 53 is switched between the energy recovery state and the non-recovery state. The collection valve 711 is switched and controlled by the control unit 2.

  The check valve 712 prevents the hydraulic oil from being sent back from the accumulator 713 to the recovery valve 711. High pressure is applied to the oil passage from the check valve 712 to the accumulator 713 side.

  The accumulator 713 can accumulate hydraulic oil pressure.

  The discharge valve 714 is provided in an oil passage between the accumulator 713 and the control valve 73 and can be switched between a state in which the hydraulic pressure accumulated in the accumulator 713 is discharged to the control valve 73 side and a non-release state. The discharge valve 714 is switched and controlled by the control unit 2.

  The hydraulic unit 72 is a power supply source that is driven by an external power source and pressurizes hydraulic oil, and includes an electric motor 721, a pump 722, and a check valve 723. The hydraulic unit 72 may include a safety valve such as a relief valve in the upstream portion of the check valve 723.

  The check valve 723 prevents hydraulic oil from being fed back from the output port of the hydraulic unit 72 to the pump 722.

  The pump 722 applies pressure to the hydraulic oil by driving the electric motor 721 and sends the hydraulic oil from the output port of the hydraulic unit 72 from the tank 724 via the check valve 723. The electric motor 721 is driven and controlled by the control unit 2.

  The control valve 73 is a valve that controls the operation of the hydraulic cylinder 51b. The control valve 73 sends hydraulic oil pressurized by one or both of the pressure accumulating unit 71 and the hydraulic unit 72 in a state (ON) in which the piston d is pushed out to the hydraulic cylinder 51b and in a direction in which the piston d is pulled back. It can be switched to a state (OFF). The control valve 73 is switched and controlled by the control unit 2.

<Arrangement of components>
The transmission shaft 14 passes through the interior of the eccentric shaft 16 and is arranged coaxially with the eccentric shaft 16. The flywheel 12 and the clutch brake 13 are disposed in the vicinity of one end of the transmission shaft 14 in the axial direction. The reduction gear 15 is disposed in the vicinity of the other end of the transmission shaft 14 in the axial direction, that is, in the vicinity of the opposite ends of the flywheel 12 and the clutch brake 13. The flywheel 12, the clutch brake 13 and the speed reducer 15 are arranged coaxially with the eccentric shaft 16.

  With such an arrangement, the heavy flywheel 12 and the clutch brake 13 and the heavy reduction gear 15 can be distributed on both sides of the eccentric shaft 16 in the axial direction. Thereby, the favorable weight balance of the forge press apparatus 1 can be aimed at. Further, a transmission shaft 14 that penetrates the interior of the eccentric shaft 16 is interposed between the flywheel 12 and the speed reducer 15. Therefore, by adopting a configuration in which the rotational motion of the motor 11 is decelerated by the speed reducer 15 and transmitted to the eccentric shaft 16, a good weight balance of the forging press device 1 can be achieved by interposing the transmission shaft 14. .

  Further, a rotary joint 43 for supplying hydraulic oil to the clutch brake 13 is disposed outside the clutch brake 13 on the extension of the axis of the transmission shaft 14. With such an arrangement, it is possible to efficiently send hydraulic oil to the clutch brake 13 and reduce the number of parts. The rotary joint 43 is connected to supply means (not shown) (for example, a tank and a pump) for supplying hydraulic oil.

  The energy recovery unit 53 is disposed on an extension of the transmission shaft 14 on the opposite side of the rotary joint 43 with the transmission shaft 14 interposed therebetween. With such an arrangement, the rotating portion of the pump 53a and the transmission shaft 14 can be directly connected, and the number of parts can be reduced as compared with the case where the transmission mechanism such as a biaxial gear is interposed. I can plan.

<Cycle operation>
Subsequently, the cycle operation of the forging press of the forging press apparatus 1 according to the first embodiment will be described. FIG. 3 is a time chart showing the operation of each part of the forging press apparatus. 3A shows the movement of the slide 18 and the hydraulic cylinder 51b. FIGS. 3B to 3F show the pump 53a, the recovery valve 711, the discharge valve 714, the control valve 73, and the hydraulic unit 72, respectively. Shows the operation.

  The slide 18 moves up and down as shown in FIG. 3A by the drive control of the motor 11 and the intermittent control of the clutch brake 13. Specifically, first, the slide 18 is lowered in the period T1 from the state where the slide 18 is stopped above, and then the molding is pressure-molded in the period T2 in the vicinity of the bottom dead center, and then rises in the period T3. When the slide 18 moves up, the clutch brake 13 applies a braking force to the transmission shaft 14. Then, the slide 18 stops above.

  In the periods T1, T2, and T3, the transmission shaft 14 rotates, and as a result, the pump 53a of the energy recovery unit 53 rotates as shown in FIG. On the other hand, when the slide 18 stops, the pump 53a stops.

  As shown in FIG. 3C, the recovery valve 711 is switched to a loaded state during a period T3 and switched to a no-load state during other periods as shown in FIG. As a result, the inertia energy of the eccentric shaft 16 and the slide 18 is recovered by the energy recovery unit 53 via the transmission shaft 14 and the speed reducer 15 during the period T3 during which the slide 18 rises. The energy recovery unit 53 sends hydraulic oil to the accumulator 713 by the recovered energy and supplies hydraulic pressure to the accumulator 713. Further, when the slide 18 moves up, a braking force is applied to the eccentric shaft 16 and the slide 18 by energy recovery.

  As shown in FIG. 3D, the discharge valve 714 switches to a state in which the hydraulic pressure is released during a period T4 from when the pressure molding is performed until the operation of the hydraulic cylinder 51b is completed, as shown in FIG. It is done.

  In the hydraulic unit 72, as shown in FIG. 3F, for example, the electric motor 721 is always driven to apply hydraulic pressure to the output port of the hydraulic unit 72. By such operations of the hydraulic unit 72 and the discharge valve 714, a high hydraulic pressure is supplied to the input port of the control valve 73 at least during the period T4.

  As shown in FIG. 3E, the state of the control valve 73 is switched by the control of the control unit 2 in a predetermined period T4 after the end of the pressure molding. Specifically, during the ascending period of the slide 18, the control valve 73 is switched to send hydraulic oil in the direction of pushing the piston d to the hydraulic cylinder 51b (ON). Thereby, the hydraulic cylinder 51b is driven, and the knockout pin 51a protrudes the molded object after molding from the lower mold 32 and moves it to a position where the conveying device 40 can grip it. Subsequently, the control valve 73 maintains this state (ON) at least until the conveying device 40 grips the workpiece and starts conveying. Thereafter, the control valve 73 is switched (OFF) so as to send the hydraulic oil in the direction in which the piston d is pulled back to the hydraulic cylinder 51b. As a result, the hydraulic cylinder 51 b is driven and the knockout pin 51 a moves to the inner surface of the lower mold 32. Thereby, the operation of one molding cycle of the forging press is completed.

  As described above, according to the forging press device 1 of the first embodiment, the energy recovery unit 53 recovers the inertial energy of the slide 18 and the eccentric shaft 16, and hydraulic pressure is applied to the knockout unit 51 using the recovered energy. Supplied. A large amount of power can be supplied to the knockout unit 51 without greatly improving the capacity of the hydraulic unit 72 by the amount of hydraulic pressure supplied. As a result, the operation time of the knockout unit 51 can be shortened while avoiding an increase in the size of the hydraulic unit 72. Note that the configuration of the pressure accumulating unit 71 is smaller in size than the configuration of the hydraulic unit 72. Therefore, the production efficiency of the forging press can be improved by shortening the operation time of the knockout portion 51. Further, by avoiding the increase in size of the hydraulic unit 72, it is easy to secure the entire arrangement space of the power supply unit of the knockout unit 51 including the pressure accumulating unit 71 and the control valve 73.

  Further, according to the forging press device 1 of the first embodiment, the energy recovery unit 53 is connected to the transmission shaft 14 and recovers rotational energy from the transmission shaft 14. Since the eccentric shaft 16 does not rotate so fast, if the pump 53a of the energy recovery unit 53 is rotated by the rotation of the eccentric shaft 16, the energy recovery efficiency is lowered. However, by recovering energy from the transmission shaft 14, high energy recovery efficiency by the energy recovery unit 53 can be obtained.

  In addition, according to the forging press device 1 of the first embodiment, the energy recovery unit 53 recovers energy during the period T3 (see FIG. 3) during which the slide 18 rises. Therefore, a part of the energy discharged when the clutch brake 13 is braked can be effectively used as the power of the knockout unit 51, compared with the case where there is no recovery configuration.

  Furthermore, according to the forging press device 1 of the first embodiment, the energy recovery unit 53 is disposed on the extension of the axis of the transmission shaft 14 and connected to the transmission shaft 14. Therefore, the number of parts can be reduced as compared with the case where a transmission mechanism such as a biaxial gear is interposed between the energy recovery unit 53 and the transmission shaft 14. Furthermore, the energy recovery part 53 is provided in the direction where the reduction gear 15 is arrange | positioned among the one end side of the transmission shaft 14, and the other end side. Therefore, even if the rotary joint 43 for supplying hydraulic oil to the clutch brake 13 is disposed on the other end side of the transmission shaft 14, the energy recovery unit 53 can be disposed without interfering with the rotary joint 43.

(Second Embodiment)
FIG. 4 is a diagram illustrating an example of an electric circuit unit in the forging press apparatus according to the second embodiment of the present invention. The forging press apparatus according to the second embodiment differs from the first embodiment in that an electric knockout portion 51 is employed. Detailed description of the same configuration as that of the first embodiment will be omitted.

  The forging press device according to the second embodiment includes an electric drive device 51c as a configuration for driving the knockout pin 51a. As the drive device 51c, for example, an actuator that moves the plunger d1 back and forth can be employed. The driving device 51 c is supported by the bed 23.

  Moreover, the forging press apparatus which concerns on 2nd Embodiment is as a structure for driving the drive device 51c, the power supply board 83, the generator 53b, the converter 81, the electrical storage part 82, the power supply board 83, the drive circuit 84, and the control part 2A. Is provided.

  The generator 53b is provided in the energy recovery unit 53, is connected to the transmission shaft 14, and recovers the rotational energy of the transmission shaft 14 by the rotation of the transmission shaft 14 to generate power. The generator 53b receives a current from the converter 81 and is loaded to recover energy. On the other hand, the generator 53b does not recover the energy because a load is not applied because the converter 81 cuts off the current.

  Converter 81 receives electric current from generator 53b, converts electric power, and stores it in power storage unit 82 during a period in which the energy of transmission shaft 14 is recovered under the control of control unit 2A. Moreover, the converter 81 interrupts | blocks the electric current of the generator 53b in the period which does not collect | recover the energy of the transmission shaft 14 by control of the control part 2A.

  The power storage unit 82 is a secondary battery, a high-capacity capacitor, or the like, and outputs the stored power to the drive circuit 84.

  The power supply board 83 is equipped with a power supply circuit, converts the power received from the external power supply E, and outputs it to the drive circuit 84.

  The drive circuit 84 receives power supplied from the power supply substrate 83 and the power storage unit 82 under the control of the control unit 2A, and outputs a current to the drive device 51c. The drive circuit 84 drives the drive device 51c in a direction in which the plunger d1 is pushed out at a predetermined timing, and drives the drive device 51c in a direction in which the plunger d1 is pulled back at another predetermined timing. The drive timing of the drive device 51c is the same as, for example, the drive timing of the hydraulic cylinder 51b of the first embodiment (see FIG. 3A).

  As described above, according to the forging press device of the second embodiment, the energy recovery unit 53 converts the rotational energy from the transmission shaft 14 into electric power and recovers it, and this electric power is used to drive the knockout unit 51. Therefore, the drive capability of the knockout unit 51 can be increased, and the operation time of the knockout unit 51 can be shortened. Further, even if the operation time is shortened, it is not necessary to greatly increase the capacity of the power supply board 83, and the power supply board 83 can be prevented from being enlarged.

  The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. For example, in the above embodiment, the configuration in which the knockout portion 51 is disposed on the bed 23 is shown. However, the knockout portion is provided on the slide 18 and moves the knockout pin from the inner surface of the upper mold 31 into the mold. It may be a configuration. Moreover, in the said embodiment, although the structure which the energy collection | recovery part 53 collect | recovers energy was shown in the period when the slide 18 raises, you may collect | recover energy in another period. In the first embodiment, the hydraulic unit 72 is provided, and in the second embodiment, the power supply board 83 that receives the external power supply E is provided. However, the hydraulic unit 72 or the power supply board 83 may be omitted if the knockout unit 51 can be driven only by the energy recovered by the energy recovery unit 53. Moreover, in the said embodiment, although the example which used hydraulic fluid as hydraulic fluid was shown, you may use another fluid as hydraulic fluid. In that case, what is indicated as hydraulic pressure in the embodiment may be read as hydraulic pressure. In addition, details shown in the embodiment, such as a hydraulic circuit for driving the knockout unit 51, an electric circuit for driving the driving device 51c, and an operation timing of the knockout unit 51, can be appropriately changed without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Forging press apparatus 2 Control part 11 Motor 12 Flywheel 13 Clutch brake 14 Transmission shaft 15 Reduction gear 16 Excend shaft 17 Connecting rod 18 Slide 21 Crown 22 Upright 23 Bed 24 Bolster 31 Upper die 32 Lower die 51 Knockout part 51a Knockout Pin 51b Hydraulic cylinder 51c Driving device 52 Hydraulic circuit section 53 Energy recovery section 53a Pump 53b Generator 71 Accumulation section 72 Hydraulic unit 73 Control valve 81 Converter 82 Power storage section 83 Power supply board 84 Drive circuit 711 Recovery valve 713 Accumulator 714 Release valve 721 Electric Motor 722 pump

Claims (6)

A slide to move the mold forward and backward,
An eccentric shaft that advances and retracts the slide by rotating; and
A transmission shaft that penetrates the interior of the eccentric shaft and is rotatable relative to the eccentric shaft;
A drive mechanism for rotating the transmission shaft;
A speed reducer that decelerates the rotation of the transmission shaft and transmits it to the eccentric shaft;
A knockout portion for projecting a molded article after molding from the mold, and
An energy recovery unit connected to the transmission shaft, recovering energy of rotation of the transmission shaft, and supplying the recovered energy to the knockout unit;
A forging press device comprising: The knockout part is
A knockout pin for projecting the molding;
A cylinder that moves the knockout pin by the hydraulic pressure of the hydraulic fluid,
The energy recovery unit applies pressure to the hydraulic fluid by the recovered energy;
The forging press apparatus according to claim 1. The knockout part is
A knockout pin for projecting the molding;
An electric drive for moving the knockout pin,
The energy recovery unit generates electric power supplied to the electric drive device by the recovered energy.
The forging press apparatus according to claim 1. The energy recovery unit recovers energy during the ascending period of the slide in one molding cycle;
The forging press apparatus as described in any one of Claims 1-3. The energy recovery unit is disposed on an extension of the transmission shaft.
The forging press apparatus as described in any one of Claims 1-4. The drive mechanism includes a flywheel and a clutch brake arranged on one side in the axial direction of the transmission shaft,
The energy recovery unit is disposed on the opposite side of the flywheel and the clutch brake across the transmission shaft.
The forging press apparatus according to claim 5.

Images