JPS6039200Y2 - Mechanical press balancer pressure automatic switching device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic balancer pressure switching device for a mechanical press.

Conventionally, the balancer pressure setting when replacing molds was as follows: balancer pressure when adjusting mold → bottom dead center of slide → adjust down → die clamp → balancer pressure when adjusting with mold → top dead center of slide → advance amount adjustment down → with mold It took time to set the balancer pressure because it was done three times during operation.

The present invention was developed in view of the above circumstances, and its purpose is to create a machine that requires only one pressure adjustment when the mold is not adjusted, when the mold is present, when the mold is not operating, and when the mold is operating. An object of the present invention is to provide a balancer pressure automatic switching device for a press.

Hereinafter, the present invention will be explained with reference to the drawings.

In the drawing, reference numeral 8 denotes a compressed air rapid supply/discharge device, and this compressed air rapid supply/discharge device 8 is composed of a main regulator 20, a check valve 21, a three-way mask valve 22, and a balance valve 23.

In this device 8, an inlet boat 8a is connected to the air supply side 24 via a main air line 18.

In the drawing, 10 is a differential pressure regulating valve, 11 is a first solenoid valve, and 12 is a second solenoid valve.

The differential pressure regulating valve 10 is set to the pressure difference between operation and adjustment, and the board 10a of the differential pressure regulating valve 10 is connected to the pipe line 13.
is connected to the air supply side 24 via this pipe line 13
A second regulator 14 is provided.

The ports 10a and 10b of the differential pressure regulating valve 10 are connected to the pipe lines 15 and 1.
6 to the ports 12a, 12b of the second solenoid valve 12.

The pilot boat 8b of the compressed air rapid supply and discharge device 8 is connected to the air supply side 24 via a pipe line 17, and the pilot pipe line 17 is provided with a regulator 18 and the first electromagnetic valve 11. A check valve 19 is provided at the confluence of the line 17 and the pipe line 13.

The port 12c of the second solenoid valve 12 is connected to the port lla of the first solenoid valve 11 via a conduit 25.

Connection ports 8c and 8d of the compressed air rapid supply/discharge device 8 communicate with an air tank 26 via a pipe line 27, and the air tank 26 is connected to a rond side chamber of a balancer 28 via a pipe line 29.

Figure 2 shows balancer air pressure and total clearance a.

a' and the current value of the slide adjustment motor.

b' is shown, but the balancer air pressure is B, which has the lowest current value of the adjustment motor during slide adjustment.
During point operation, there is no overall clearance that is problematic for press operation (
This is considered as point A.

In FIG. 2, the overall clearance a shown by the solid line was measured while increasing the balancer air pressure, and the dotted line a' was measured while decreasing the balancer air pressure.

Further, the operating current value b shown by a solid line is the current when rising, and the operating current value b' shown by a dotted line is the current when falling.

Point C is the point of the overall clearance reference value.

5O in the state shown in FIG. 1, that is, the first solenoid valve 11.
When LA is ON and 5OLCON is on in the second solenoid valve 12, the mold is not in operation and the cloth making operation is in progress.

The pressure is adjusted only in this case, and is adjusted each time using the balancer chart shown in FIG.

In the balancer diagram of FIG. 3, the air pressure is the air pressure at point A when the upper die weight of curve S during operation is 0.

When the upper die weight of curve R during adjustment is 0, the air pressure is the air pressure at point B.

In this case, the pilot pressure becomes the pressure of the second regulator 14, which is led to the pilot port 8b of the compressed air rapid supply and discharge device 8.

Main regulator 2 has the same pressure as this pilot pressure.
The zero secondary pressure flows into the three-way master valve 22 through the check valve 21.

On the other hand, the pilot pressure is guided to the pilot port of the three-way mask valve 22 via the balance valve 23, the three-way mask valve 22 is turned ON, and the supplied air is guided to the air tank 26.

The pressure within this air tank 26 is quickly adjusted to the same pressure as the pressure set in the main regulator 20.

In this way, the pressure in the balancer 28 is regulated.

Next, in the case of no mold adjustment, 5OL in the first solenoid valve 11
When A is OFF and 5OLB is ON, air tank 26
The pressure inside becomes the pressure of the first regulator 18 by the compressed air rapid supply/discharge device 8.

Since this pressure is always constant, once it is set, no further adjustment is required.

Next, when adjusting fabric production, the first solenoid valve 11
A ON, 5OLDON in the second solenoid valve 12.

Therefore, since the air pressure that has passed through the second regulator 14 and the differential pressure regulating valve 10 becomes the pilot pressure, the pressure inside the air tank 26 is controlled by the compressed air rapid supply and discharge device 8.
The pressure is reduced by a preset pressure difference from the regulator 14 through the differential pressure regulating valve 10.

That is, ■ Pressure is constant when the mold is not adjusted.

■ When adjusting fabric production, the pressure difference between operation and adjustment is set in advance using the differential pressure adjustment valve 10, so automatic switching is possible using the selector.

■ Adjust each time using the balancer chart when the mold is not running or when cloth making is running.

becomes.

Therefore, it is only necessary to adjust the pressure once when the mold is not adjusted, when adjusting the cloth making, when the mold is not operating, and when the cloth making is being performed.

The present invention has been described in detail above, and includes an air tank 26 that stores the air supplied to the balancer 28, and an air tank 26 that is provided in the circuit from the air pressure supply side 24 to the air tank 26.
a compressed air rapid supply/discharge device 8 that controls the air pressure in the compressed air rapid supply/discharge device 8 to the same pressure as the set pressure; and a regulator 18 provided in a pilot circuit extending from the air pressure supply side 24 to the pilot port of the compressed air rapid supply/discharge device 8. A second regulator 14 is provided in the pilot circuit in parallel with the regulator 18, and a second regulator 14 is provided in the pilot circuit.
A differential pressure regulating valve 10 is provided in parallel with 8 and set to the pressure difference between operation and adjustment, and a second regulator 14 is provided in the pilot circuit alone or in combination with the second regulator 14 and the differential pressure regulating valve 10. A second solenoid valve 12 that switches and outputs either the pressure that has passed through the regulator 18 or the second solenoid valve 12 provided in the pilot circuit, and a pilot port of the compressed air rapid supply/discharge device 8. It is characterized by comprising a first electromagnetic valve 11 that directs the air to the air.

Therefore, when the mold is not adjusted, the pressure is constant, and when adjusting the fabric, the pressure difference between operation and adjustment is set in advance with the differential pressure regulating valve, so automatic switching by the selector, when the mold is not operating, and when the mold is not operating. The pressure must be adjusted each time according to the balancer chart, and the pressure adjustment only needs to be done once when the mold is not adjusted, when the cloth making is being adjusted, when the mold is not operating, and when the cloth making is being operated.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the configuration of the present invention-embodiment, Fig. 2 is an explanatory diagram of the relationship between balancer air pressure, total clearance, and current value, and Fig. 3 is an explanatory diagram of the relationship between balancer air pressure, total clearance, and current value.
The figure is a balancer chart. 8 is a compressed air rapid supply and discharge device, 10 is a differential pressure regulating valve, 1
1 is a first solenoid valve, 12 is a second solenoid valve, 14 is a second regulator, 18 is a second regulator, and 26 is an air tank.

Claims (1)

[Scope of utility model registration request] an air tank 26 that stores air supplied to the balancer 28;
A compressed air rapid supply/discharge device 8 that is provided in a circuit from the air pressure supply side 24 to the air tank 26 and controls the air pressure in the air tank 26 to the same pressure as the set pressure, and the air pressure supply side 24
a second regulator 14 provided in the pilot circuit in parallel with the second regulator 18; and a second regulator 14 provided in the pilot circuit in parallel with the regulator 18. A differential pressure regulating valve 10 is provided in parallel with the valve 10 and is set to the pressure difference during operation and adjustment, and a second regulator 14 is provided in the pilot circuit alone or the second regulator 14 and the differential pressure regulating valve 10 are provided in the pilot circuit. a second solenoid valve 12 that switches and outputs either the pressure passed through the regulator 18 or the second solenoid valve 12 provided in the pilot circuit to the pilot port of the compressed air rapid supply/discharge device 8; An automatic balancer pressure switching device for a mechanical press, characterized in that it is equipped with a first solenoid valve 11 for directing the pressure.