JP2000153318A - Method for saving energy in punch press and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save energy by stopping the rotational driving of a power motor by judging the time when a punch press is not in automatic operation. SOLUTION: In the punch press, by hitting a punch with a crank-shaft which is rotationally driven with a press motor 33 as a press driving means or a ram through a hydraulic cylinder which is freely vertically movable, a work is punched in cooperation of the punch with a die. Whether the punch press is automatically operated is judged with a controller (CNC 17) for controlling the punch press and, when the press is not in automatic operation, driving of the power driving means such as the press motor 33 or a hydraulic motor 71 as a hydraulical driving means for supply pressure oil to the hydraulic cylinder is stopped. By stopping driving of the power driving means except the time in automatic operation, the energy is saved and noise caused by the power driving means is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for saving energy in a punch press.

[0002]

2. Description of the Related Art Conventionally, a punch press such as a turret punch press is provided with a crankshaft or a hydraulic cylinder for hitting a punch with a vertically movable ram, and a rotary for rotating the crankshaft. A power motor such as a press motor as a driving unit or a hydraulic motor as a hydraulic driving unit for supplying pressure oil for driving a hydraulic cylinder is provided.

When a punch is hit, a work inserted between a punch guide for guiding the punch and a die mounted in a die holder is punched.

[0004] The above-mentioned power motor is always started not only during punching but also when the setup of the mold and the work is stopped.

[0005]

By the way, in the conventional punch press machine, it is natural that the press motor and the hydraulic motor are activated during the punching process. Activating the press motor or hydraulic motor during time wastes electricity bills,
There was a problem that it would also adversely affect global warming.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to determine when a punch press is not automatically operating and stop the rotation of a power motor to save energy. An object of the present invention is to provide a method and an apparatus for saving energy in a punch press.

[0007]

According to a first aspect of the present invention, there is provided a method for saving energy in a punch press machine, comprising: a crankshaft driven by a press drive means or a hydraulic drive means; In a punch press machine that strikes a punch through a ram and punches a work in cooperation with a punch and a die,
The control device determines whether or not the punch press machine is automatically operating, and when the automatic operation is not being performed, stops the drive of the press drive unit and / or the hydraulic drive unit.

Therefore, the power drive means such as the hydraulic drive means and the press drive means need to rotate only during the automatic operation, so that the drive of the power drive means is stopped at other times to save energy. Furthermore, it contributes to the reduction of noise by the power drive means.

According to a second aspect of the present invention, there is provided a method of saving energy in a punch press according to the first aspect of the present invention, wherein the control device drives various devices provided in the punch press. It is also characterized in that a driving stop command is given to the driving means when the automatic driving is not being performed.

Therefore, the driving of the various driving means is additionally stopped when the automatic driving is not being performed, thereby contributing to energy saving measures and reduction of noise by the various driving means.

According to a third aspect of the present invention, there is provided the energy saving method for a punch press according to the first or second aspect, wherein the hydraulic drive means, the press drive means, and the various drive means are provided. If the driving of the corresponding drive means is within the set time since the control device determines that the automatic operation is not being performed, the next automatic operation is continued without stopping and the next automatic operation is performed within the set time. When there is no driving, the driving is stopped.

[0012] Therefore, the provision of the timer unit does not frequently turn on / off the power drive means such as the hydraulic drive means, the press drive means, and the various drive means. If the automatic operation is started after the setup work for performing the above work, the next automatic operation is performed without stopping the power drive means.

According to a fourth aspect of the present invention, there is provided a method for energy saving in a punch press according to the present invention, wherein a punch is hit by a vertically movable ram, and a punch is formed on a workpiece by cooperation of the punch and the die. On the machine,
Inverter means controlled by a punch command is provided in the hydraulic drive means, and the hydraulic drive means is controlled to rotate at high speed while the punch command is ON, and to low speed while the punch command is OFF. is there.

Therefore, the rotation speed of the hydraulic motor 81 is changed to a low-speed rotation (idling rotation) even during a relatively short period of time during the setup in which the punching is not performed and between the next punching. Energy consumption can be suppressed.

Also, instead of suddenly changing from a completely stopped state to a high-speed rotation, a low-speed rotation (idling rotation)
, The response speed can be increased.

According to a fifth aspect of the present invention, there is provided an energy-saving apparatus for a punch press machine according to the present invention, wherein a punch is hit by a crankshaft rotationally driven by a press driving means or a vertically movable ram by a hydraulic driving means. A punch press machine for punching a workpiece by the cooperation of the above, it is determined whether or not the punch press machine is in automatic operation, and when not in automatic operation, the press driving means and / or
Alternatively, a control device for giving a command to stop driving the hydraulic drive means is provided.

Therefore, the operation is the same as that of the first aspect, and the power drive means such as the hydraulic drive means and the press drive means need to rotate only during the automatic operation. By stopping the driving of the motor, it is possible to contribute to energy saving measures and further reduce noise by the power driving means.

According to a sixth aspect of the present invention, there is provided an energy saving device for a punch press according to the present invention, wherein the control device is configured to drive various devices provided in the punch press. In addition to the drive means, a command unit for giving a drive stop command when the automatic driving is not being performed is provided.

Accordingly, the operation is the same as that of the second aspect, and the driving of the various driving means is additionally stopped when the automatic driving is not being performed, thereby contributing to energy saving measures and reduction of noise by the various driving means. .

According to a seventh aspect of the present invention, there is provided the energy saving apparatus for a punch press according to the fifth or sixth aspect of the present invention, wherein the control unit determines that the automatic operation is not being performed. A timer unit is provided for stopping the drive of the hydraulic drive, the press drive, and the drive of the various types of drive after a set time has elapsed.

Accordingly, the operation is the same as that of the third aspect, and the provision of the timer unit does not frequently turn on / off the power drive means such as the hydraulic drive means, the press drive means, and the various drive means. If the automatic operation is started after the worker performs the setup work for the next work within the set time from the end, the next automatic operation is performed without stopping the power drive means.

According to an eighth aspect of the present invention, there is provided an energy saving device for a punch press machine according to the present invention, wherein a punch is hit through a vertically movable ram, and a punch is formed on a work by cooperation of the punch and the die. On the machine,
An inverter unit controlled by a punch command is provided in the hydraulic drive unit, and a control device is provided which gives a command to control the hydraulic drive unit to rotate at high speed while the punch command is ON, and to rotate at a low speed while the punch command is OFF. It is characterized by becoming.

Therefore, the rotation speed of the hydraulic motor 81 is reduced to a low speed (during a relatively short period of time during setup where punching is not performed and during the next punching). Idling rotation)
, It is possible to suppress wasteful energy consumption.

Also, instead of suddenly changing from a completely stopped state to high-speed rotation, low-speed rotation (idling rotation)
, The response speed can be increased.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a punch press working method and apparatus according to the present invention will be described below with reference to the drawings, taking a turret punch press as an example.

Referring to FIG. 4 and FIG. 5, a turret punch press 1 as a punch press according to the present embodiment includes side frames 5 and 7 erected on both sides of a base 3.
The structure of the main body frame 11 is such that both sides of the upper frame 9 are supported. At the lower part of the upper frame 9, a disk-shaped upper turret 13 having various types of punches P detachably mounted is rotatably mounted.

A lower turret 15 facing the upper turret 13 is rotatably mounted on the upper surface of the base 3. On this lower turret 15, a large number of dies D facing various types of punches P are formed in an arc shape. And are detachably mounted. The axis of the upper turret 13 and the axis of the lower turret 15 are arranged on the same axis.
The upper turret 13 and the lower turret 15 are commanded by, for example, a T-axis servomotor 19 as a turret rotation drive unit from a CNC 17 as a control device as shown in FIG. It is rotated synchronously in the same direction via the rotation drive transmission means.

A ram 23 is mounted on the lower surface of the upper frame 9 at a substantially central portion so as to be vertically movable. The rotation of the upper turret 13 and the lower turret 15 causes the ram 2 to rotate.
The punch P indexed and positioned below 3 is pressed by the ram 23.

As a press driving means for moving the ram 23 up and down, for example, a ram 23 is connected via a connecting rod (not shown) to a crankshaft 25 which is horizontally supported on a frame. Furthermore, the crankshaft 25
At one end of the flywheel 27, a flywheel 27 is rotatably supported via a clutch mechanism.
As shown in FIG. 4, is rotated by, for example, a press motor 33 as a press rotation driving means via a rotational force transmitting means such as a belt 29 and a pulley 31.

Therefore, the rotational force of the flywheel 27 is transmitted to the crankshaft 25 by the operation of the clutch mechanism, and the rotation of the crankshaft 25 causes the ram 23 to move up and down via the connecting rod. The plate-shaped workpiece W that has been hit and moved to the processing position K is punched by the cooperation of the punch P and the die D.

The press motor 33 is shown in FIGS.
As shown in (B), it is electrically connected to CNC 17 so that a command is given via relay RY1.

The turret punch press 1 is provided with a work movement positioning device 35 for moving and positioning the work W in the front-rear and left-right directions.
Is gripped by the workpiece W. The work movement positioning device 35 is controlled by the CNC 17 to position the work W at an appropriate position between the punch P and the die D.

The work movement positioning device 35 is disposed on the lower right side of the turret punch press 1 in FIG.
The work movement positioning device 35 is a turret punch press 1
A carriage base 39 having a length substantially equal to the entire machine width is provided so as to be movable in the Y direction on a carriage base linear guide 43 provided on the table frame 41. Ball screw 45
It is provided movably in the Y direction by a Y-axis feed mechanism comprising a Y-axis feed drive means, for example, a Y-axis servo motor 47. The Y-axis servo motor 47 is shown in FIG.
It is electrically connected to the CNC 17 as shown in FIG.

The carriage base 39 can be moved from the right side in FIG. 5 to a punching position on a horizontally installed center table 49, and a side table 51 is provided below the carriage base 39. The carriage base 39 is fixed so as to be divided into left and right sides, and is movable in the Y direction as the carriage base 39 moves.

The carriage base 39 has a carriage linear guide 53 on its side facing the turret punch press 1.
As shown in FIG. 4, a carriage 55 having a gripping device 37 is provided on the side surface of the carriage base 39 so as to be slidable in the X-axis direction along the carriage linear guide 53. Have been.

A carriage ball screw 57 provided on the side surface of the carriage base 39 substantially through the center of the carriage 55 as shown in FIG. 5 is provided. For example X as
It is driven and rotated by a shaft servomotor 61. College 55
The so-called X-axis is freely moved in the longitudinal direction of the carriage base 39 by the rotation of the carriage ball screw 57, and the work W is positioned and fed in the X-axis direction. Note that X
The shaft servomotor 61 is electrically connected to the CNC 17 as shown in FIG.

As described above, the punch P mounted on the turret punch press 1 and the die D mounted on the lower turret 15
Then, after the plate-shaped work W is positioned, the punch P is pressed by the ram 23 so that the work W is punched by the punch P and the die D.

Next, a method and an apparatus for saving energy in a punch press machine according to a main part of an embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 1, for example, a CNC 17 as a control device built in the turret punch press 1
Is provided with a sequencer 63, and the sequencer 63 has a built-in timer unit 65 having a timer function. Start SW67 of turret punch press 1 is O
N, turret punch press 1 by CNC17
Automatic operation is performed.

The CNC 17 is provided with various power motors such as the aforementioned X-axis servo motor 61, Y-axis servo motor 47, T-axis servo motor 19, and C-axis servo motor 69 as various driving means for various devices.
They are electrically connected via AMP2, AMP3 and AMP4.

The sequencer 63 has a press motor 3
3 (M1) is electrically connected so that a command is given via the relay RY1.

The turret punch press 1 is provided with various hydraulic devices. For example, a hydraulic drive means for rotating a hydraulic pump (not shown) for supplying pressure oil to the various hydraulic devices, such as a hydraulic drive unit, is provided. Motor 71 (M2)
Are electrically connected to the sequencer 63 so that a command is given via each relay RY2 as shown in FIG.

Further, as shown in FIG. 1A, the sequencer 63 is configured to receive various input signals from various devices and output various output signals to various devices.

Further, the sequencer 63 is connected to an energy saving on / off switch 73 for executing an energy saving function. In the present embodiment, the energy saving function is executed by the signal of the energy saving ON / OFF SW 73 being “ON”.

The energy saving function of the CNC 17 is controlled as shown in FIG. Start S
When W67 is turned on, automatic operation is started, and usually, the press motor 33 or the hydraulic motor 71 is turned on and rotates (step S1).

In the present embodiment, the sequencer 63 determines whether or not the automatic operation is being performed by the sequencer 63 based on the "ON" signal of the energy-saving ON / OFF switch 73. Therefore, if the energy saving on / off switch 73 is “off”, the press motor 33 or the hydraulic motor 71 is in the ON state (step S2).

When the energy-saving on / off switch 73 is "on", the sequencer 63 determines whether or not the automatic operation is being performed (step S3). If the automatic operation is being performed, the press motor 33 or the hydraulic motor 71 is in the ON state. If the automatic operation is not being performed, the timer unit 65 in the sequencer 63 is operated and the press motor 33 or the hydraulic The motor 71 is turned off and the rotation stops (step S
4, S5).

The provision of the timer section 65 prevents the power motors such as the press motor 33 and the hydraulic motor 71 from being frequently turned on / off.

For example, as shown in the upper part of FIG. 3, the worker carries in the next work W and performs work such as inputting a program within a timer set time (for example, about 10 minutes) from the end of the automatic operation. If the start switch 67 is turned on after that, the next processing can be performed without stopping the rotation of the power motor.

As described above, the power motors such as the press motor 33 and the hydraulic motor 71 are rotated only during the automatic operation, and the power motor is not operated at other times or other than the time obtained by adding the timer set time during the automatic operation. Stopping the rotation of the motor contributes to energy saving and noise reduction.

FIG. 6 shows a hydraulically driven punch press.
Hydraulic motor 8 as a hydraulic drive means for rotationally driving a hydraulic pump (not shown) for supplying hydraulic oil to hydraulic equipment
An example is shown in which one drive unit is provided with inverter means controlled by a punch command from the CNC 17.

That is, the drive section of the hydraulic motor 81 is provided with inverter means 83, and the inverter means 8
3 is provided so that the punch command PF from the CNC 17 is input. Then, pressure oil from a hydraulic pump (not shown) driven by a hydraulic motor 81 is sent to a hydraulic cylinder 85 of a hydraulically driven punch press (not shown) via a direction switching valve (not shown). . A striker (not shown) that strikes the punch P is provided at the tip of the piston rod of the hydraulic cylinder 85.

The operation of the inverter 83 will be described with reference to FIG. When the punch command PF is turned on, the rotation speed of the hydraulic motor 81 is changed from low-speed rotation (idling rotation) to high-speed rotation, and the hydraulic cylinder 85 is moved downward through a directional switching valve (not shown) in a downward direction. Pressure oil is sent from a hydraulic pump (not shown). After performing the punching process, the hydraulic cylinder 85 returns to the initial rising end.

The rotation speed of the hydraulic motor 81 is changed to high speed only while the punch command PF is ON.
While the punch command PF is OFF, it is controlled to return to the low-speed rotation.

Accordingly, the rotation speed of the hydraulic motor 81 is changed to a low speed rotation (idling rotation) even during a relatively short time between the setup and the next punching process in which the punching process is not performed. Energy consumption can be suppressed.

Also, instead of suddenly changing from a completely stopped state to high-speed rotation, low-speed rotation (idling rotation)
, The response speed can be increased.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. In the example of the present embodiment, a turret punch press has been described as an example of a punch press machine, but other punch presses may be used.

In the above-described embodiment, the energy saving /
Although the off switch is used, the energy saving on / off switch may be omitted. Further, in the above-described embodiment, the determination is made based on whether or not the automatic operation is being performed. However, the determination may be performed in a setting mode such as an “automatic” mode.

In addition, since the servomotors as various driving means such as the X-axis servomotor 61, the Y-axis servomotor 47, and the T-axis servomotor 19 consume relatively little electric power, they are not energy-saving in the above-described embodiment. However, the above-mentioned sequencer 63 can also be used as a command unit for stopping the rotation of the various servomotors when the automatic operation is not being performed.

In the above-described embodiment, a press motor for rotating a crankshaft is described as an example of a drive device for a ram that strikes a punch. However, when a ram is driven by a hydraulic cylinder, a press motor is used. 33 is not used, and a hydraulic motor 71 or 81 for supplying hydraulic oil to the hydraulic cylinder 85 is used.

[0061]

As will be understood from the above description of the embodiment of the invention, according to the first aspect of the invention, the power drive means such as the hydraulic drive means and the press drive means rotate only during automatic operation. It is necessary to stop the driving of the power driving means during other times, so that it is possible to achieve energy saving measures and reduce noise by the power driving means.

According to the second aspect of the present invention, since the driving of the various driving means is additionally stopped when the automatic driving is not being performed, it is possible to save energy and to reduce noise by the various driving means.

According to the third aspect of the present invention, since the timer unit is provided, the power drive units such as the hydraulic drive unit, the press drive unit, and the various drive units do not frequently turn on / off. If the operator starts the automatic operation after setting up for the next work within the set time, the next automatic operation can be performed without stopping the power drive means, so energy saving considering work efficiency Measures can be taken.

According to a fourth aspect of the present invention, in the hydraulically driven punch press machine, inverter means controlled by a punch command is provided in the hydraulic drive means, and while the punch command is ON, the hydraulic drive means is rotated at a high speed. , Punch command is OF
During the period F, the rotation speed of the hydraulic motor 81 is controlled to a low speed (idling rotation) even during a setup in which punching is not performed and during a relatively short time between the next punching. ), It is possible to reduce wasteful energy consumption.
In addition, instead of suddenly changing from a completely stopped state to high-speed rotation, the speed is changed from low-speed rotation (idling rotation) to high-speed rotation, so that the response speed can be increased.

According to the fifth aspect of the present invention, it is the same as the effect of the first aspect, and the power drive means such as the hydraulic drive means and the press drive means need to rotate only during the automatic operation. Since the driving of the power driving means is stopped during the period of time, energy saving measures and reduction of noise by the power driving means can be achieved.

According to the sixth aspect of the present invention, the same effect as in the second aspect is achieved, and the driving of the various driving means is additionally stopped when the automatic driving is not being performed. Noise can be reduced.

According to the seventh aspect of the present invention, the effect is the same as that of the third aspect, and the power drive means such as the hydraulic drive means, the press drive means, and the various drive means are frequently turned on by providing the timer section. For example, if the operator starts the automatic operation after performing the setup work for the next work within the set time after the end of the automatic operation so that the automatic driving is not stopped, the next automatic operation is performed without stopping the power driving means. Can be done,
Energy saving measures can be taken in consideration of work efficiency.

According to the eighth aspect of the invention, the same effect as the fourth aspect of the invention can be obtained.

[Brief description of the drawings]

FIGS. 1A and 1B are block diagrams of a control device in a punch press used in an embodiment of the present invention.

FIG. 2 is a flowchart of the embodiment of the present invention.

FIG. 3 is an operational state diagram over time in various devices according to an embodiment of the present invention.

FIG. 4 is a side view of the punch press used in the embodiment of the present invention.

FIG. 5 is a plan view of a punch press used in the embodiment of the present invention.

FIG. 6 is an explanatory view of another embodiment of the hydraulic drive unit according to the present invention.

FIG. 7 is a timing chart for explaining the operation of the hydraulic drive unit in FIG. 6;

[Explanation of symbols]

 Reference Signs List 1 turret punch press (punch press machine) 13 upper turret 15 lower turret 17 CNC (control device) 19 T-axis servomotor (various driving means) 23 ram 25 crankshaft 33 press motor (press driving means) 35 work moving positioning device 37 Gripping device 47 Y-axis servo motor (various driving means) 61 X-axis servo motor (various driving means) 63 Sequencer (command unit) 65 Timer unit 69 C-axis servo motor (various driving means) 71, 81 Hydraulic motor (hydraulic driving means) ) 73 Energy saving ON / OFF SW 83 Inverter means 85 Hydraulic cylinder PF Punch command

Claims (8)

[Claims] 1. A punch press machine in which a punch is hit by a crank shaft rotated by a press driving means or a ram which can be moved up and down by a hydraulic driving means, and a punching process is performed on a work by cooperation of a punch and a die. Wherein the control device determines whether or not the punch press machine is in automatic operation, and when the automatic operation is not in operation, stops driving of the press drive unit and / or the hydraulic drive unit. . 2. The control device according to claim 1, further comprising: giving a drive stop command to various driving means for driving various devices provided in the punch press when the automatic driving is not being performed. The energy saving method in the punch press according to claim 1. 3. The method according to claim 1, wherein the driving of the corresponding driving means among the hydraulic driving means, the press driving means, and the various driving means is within a set time after the control device determines that the automatic driving is not being performed. The energy saving method for a punch press according to claim 1 or 2, wherein the next automatic operation is continued without stopping as it is, and the driving is stopped when there is no next automatic operation within a set time. 4. A hydraulically driven punch press machine for punching a workpiece through a vertically movable ram and punching a workpiece in cooperation with a punch and a die. A method for energy saving in a punch press machine, wherein the hydraulic driving means is controlled to rotate at a high speed while a punch command is ON, and to a low speed when the punch command is OFF. 5. A punch press machine in which a punch is hit by a crank shaft which is rotationally driven by a press driving means or a ram which can be moved up and down by a hydraulic driving means, and punching is performed on a work by cooperation of the punch and the die. Wherein a control device is provided for determining whether or not the punch press machine is in automatic operation and for giving a command to stop driving of the press drive unit and / or the hydraulic drive unit when not in automatic operation. Energy saving device in punch press machine. 6. The control device further includes a command unit for giving a command to stop driving when automatic operation is not being performed to various driving means for driving various devices provided in the punch press machine. The energy saving device for a punch press according to claim 5, characterized in that: 7. The control device instructs the hydraulic drive unit, the press drive unit, and the various drive units to stop driving after a lapse of a set time from when it is determined that automatic operation is not being performed. The energy saving device of the punch press according to claim 5 or 6, further comprising a timer unit for performing the operation. 8. A hydraulically driven punch press machine for punching a workpiece through a vertically movable ram and punching a workpiece in cooperation with a punch and a die. A punch press machine provided with a drive unit, which gives a command for controlling the hydraulic drive unit to rotate at a high speed while the punch command is ON, and to a low speed while the punch command is OFF. Energy-saving equipment.