JPS59125300A - Decelerating method of high speed press device - Google Patents

Abstract

PURPOSE:To enable emission of a deceleration command in an optimum time according to the speed of a press machine by measuring the traveling length of a material terminal in accordance with the detection signal from a terminal detector provided to an un-coiler, comparing the same with a set value and emitting the deceleration command. CONSTITUTION:A high speed press device is constituted so as to feed a material 1 fed from an un-coiler 2 via a roll feed 3 to a press machine 4. A switch 8 in such a press device is actuated by the detection signal from a terminal detector 7 provided to the un-coiler 2 to open an AND gate 9 which passes the output pulse generated from an encoder 5 provided to the feed 3 and corresponding to the rotation thereof to a counter 10. The counter counts the traveling length of the material terminal from the un-coiler 2. The traveling extent is compared with the set distance value from a digital switch 6, and when the terminal arrives at the distance lm in the position where a deceleration command is to be emitted, a transistor 13 is turned on via an amplifier 12 by the output from a comparator 11, by which a relay 14 is actuated to emit the deceleration command to the press machine.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of controlling a press apparatus, and more particularly to a method of decelerating a high-speed press apparatus.

A high-speed press machine supplies a steel plate wound into a coil shape to a press machine while being unwound by an uncoiler and synchronized with the press knee. If the coiled material runs out, the press runs idle and there is a risk of destroying the mold, so it is necessary to detect the presence or absence of material and perform controls such as slowing down and stopping the press. Conventionally, this control method uses a phototube, a limit switch, a proximity switch, etc. to determine the presence or absence of material at a fixed position, and issues a deceleration command when the material is no longer present. When issuing a deceleration command at a fixed position like this, it must be set so that it does not run blank even at maximum speed. Therefore, when used at intermediate speeds, there was excess material, making it inefficient to operate at low speeds.

The present invention is aimed at improving such drawbacks, and provides a method for controlling a press machine that issues a deceleration command when the end of the material is optimal according to the speed of the press machine. The purpose is to

Therefore, in the present invention, the uncoiler is provided with an end detector for detecting the end of the material, and the distance to the position where the deceleration command is to be issued is set in advance in accordance with the press speed, and the distance from the end detector is set in advance. This apparatus is characterized in that the distance of material traveling is measured based on a terminal detection signal, and when the measured value reaches a value set by the distance setting device, a deceleration command is issued.

Two examples using the present invention will be described below. Material 1
As shown in Figure 1, from the uncoiler 2 through the figure 8 loop, the roll feed 3 is applied.

It is fed into a press machine 4. An encoder 5 is placed in front of the roll feed 3 for feeding the material 1.

The encoder 5 outputs an output pulse corresponding to the rotation G of the roll feed 3, and outputs a high frequency pulse at high speed and a low frequency pulse at low speed. 1st
1 m in the figure is the distance to the position where you want to issue the deceleration command, and it depends on the press speed of the press machine, that is, the feed speed of the material. This distance is set in a distance setting device 6 consisting of a digital switch or the like.

A switch serving as a terminal detector 7 is provided at the winding core of the uncoiler 2, and the switch 8 is configured to turn on when the material runs out. The pulses from the encoder 5 and the signal from the switch 8 are input to the AND gate 9, and when they are output, the AND gate 9 is opened and the pulses from the encoder 5 are counted by the counter 10.

Since the value counted by this counter 10 is the output pulse of the encoder 5, it naturally responds to the feed speed of the material 1, and ultimately counts the feed length. The counted value and the value set by the distance setting device 6 are compared by the comparator 11, and when the two match, an output is output, and the transistor 13 is turned on via the amplifier 12. A relay 14 connected to the collector for issuing a deceleration command is operated.

In the circuit of FIG. 2, the line 15 connected to the counter 10 is for resetting the counter 10, and while the material 1 is being wound around the uncoiler 2, the switch 16 is kept off and the counter is turned off. This is to turn off and release the reset when the end of the material is detected. Therefore, set the distance to the position where the deceleration command should be issued according to the press speed in advance on the distance setting device 6. If the press device is then operated as it is, the material wound around the uncoiler 2 will gradually decrease until the uncoiler 2 runs out of material.

Then, the switch 16 is turned off to reset the counter 10, and the switch 8 is turned on to open the AND gate 9. Therefore, the output pulses from the encoder 5 are input to the counter 10 and counted. When the value becomes equal to the value set in the distance setting device 6, an output is output from the comparison circuit 11, and the transistor 13 is turned on via the intensifier 12.

The relay 14 is operated to issue a deceleration command. By simply changing the set value depending on the press speed, a deceleration command can be issued at the most efficient position according to the speed.

As described above, according to the present invention, even if the press speed changes, the most efficient position is always set by simply setting the position at which the deceleration command should be issued on the distance setting device consisting of a digital switch, etc. It becomes possible to issue a deceleration command.

[Brief explanation of drawings]

1 is a wedge-shaped diagram of a press apparatus for carrying out the present invention;
The figure is a block diagram of a circuit implementing the present invention. 1... Material 7... Terminal detector 2...
・Uncoiler 8... Switch 3... Coal feed 9... And Kate 4... Press machine 1
0...Counter 5...Encoder 11...Comparator 6...Distance setting device Patent amount Applicant: AIDA Engineering Co., Ltd. Representative Patent Attorney Kiyoshi Nakayama (and 1 other person)

Claims (1)

[Claims] In a deceleration method that detects the end of the material supplied from the uncoiler and issues a deceleration command to the press machine, the uncoiler is equipped with an end detector that detects the end of the material, and the deceleration command is issued in advance according to the press speed. The distance at M1 is set in the distance setting device, the distance of the material is measured by the terminal detection signal from the terminal detector, and when the measured value reaches the value set in the distance setting device. A method for decelerating a high-speed press machine, characterized by issuing a deceleration command.