JPS59189100A - Device for stopping press device at fixed position - Google Patents

Abstract

PURPOSE:To stop automatically a press device at a fixed position by attaching an encoder to a revolving shaft synchronized with the cycle of a press slide, counting the outputs therefrom, selecting the sliding angle by a press speed selecting switch and outputting a stop signal when the values thereof coincide. CONSTITUTION:An encoder 1 is attached to a revolving shaft 1 constituting a press device, and the outputs therefrom are respectively successively inputted via a pulse line 2 to counters 3, 4, 5 for the 1st, 10th and 100th digits. The counters 3, 4, 5 are made resettable by a reset line 6. The count values from the counters 3, 4, 5 are compared in comparators 7, 8, 9 connected to a rotary switch 10, and the output signals obtd. by the comparison are transmitted via an OR circuit 12, a driver 13 and a transistor 14 to a relay 15. The number of revolutions of the revolving shaft and the sliding angle corresponding thereto are thus detected and a relay 15 is actuated to stop the device when a desired value is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press device, and more particularly to a fixed position stopping device that can reliably stop the press device at a predetermined position.

Conventionally, press equipment had a constant press speed, so
When stopping, stopping at a fixed position was done in a spectacular manner. However, in the case of a variable speed press device that can change the press speed, it cannot be easily stopped at a fixed position. For example, even when stopping at the origin.

This is because the bevel angle varies depending on the press speed.

If the press stop signal is changed and given depending on the press speed, η can be reduced. Of course, since we know in advance how many strokes there will be depending on the press speed, we can simply send a stop signal at an angle that corresponds to the press speed to stop the press. I didn't have the means.

The present invention has been made in view of the above points, and the present invention automatically sets the angle at which a stop signal is issued when stopping the press at the same time as selecting the press speed L7. The object of the present invention is to provide a fixed position stopping device that automatically issues a stop signal and stops at a predetermined position when it rotates to that angle.

Therefore, 5 the present invention has the same rv as the press slide cycle.
Take the encoder to the rotation 1i-1II and count its output, while turning on the switch to select the press speed so that the selected speed selects a particular angle [7, that selection The pressed angle is compared with the counted value of the counter (7), and the pressing device is stopped when they match (7) or when the counted value is less than the selected angle. The illustrated embodiment will be described below.

The origin encoder 1 is rotated in synchronization with the press slide cycle (not shown), and its output is sent to the first digit counter 3 via the pulse line 2. The counter of this embodiment is inputted to the above 1.
It is composed of three counters: a digit counter 3, a 10-digit counter 4, and a 1.00-digit counter 5, and counts from 1° to 360°.

These counters are also connected to the encoder 1 via a reset line 6 (7) so that a reset signal is applied when passing the origin.
．． 5 is connected to comparators 7, 8.9 which compare the count values of the respective digits.

10 is a switch linked to the low fleece inch that selects the press speed, and in the case of two guns, it can be changed to 23 stages. Selected terminals] Oa~10)~r K are IJ-do wires respectively], 1
Similarly, four input lines 7a to 7d are connected to the comparator 7°8.9.

8a to 8d and 9a to 9d are connected. A diode 12 is connected as shown between these lines and the lead wires 11a to 11a to 1] and W (7, and the combination of these diodes allows the comparators 7, 8...
It is said that it is possible to give to 9. These angles correspond to the press speed (7 is selected as the sliding angle). When it is a match or a match, the OR circuit 12 turns on the trannostar 14 via the driver 13, operates the relay 15, and stops the press.

Therefore, when the press speed is selected with the switch 10, the angle corresponding to the press speed is determined by the comparator 7°8.9, and when the stop switch (not shown) is turned on (7
' tl- passes the origin and backward counter 31415
and a′l number (7, II whose count value coincides with the above angle
; At point i, the transisk 14 is turned on, and the relay 15 is operated to stop it. The angle selected by the switch 10 corresponds to the press speed [7]. Since it is a slip angle, Stop.

In this case, even if the vehicle is traveling more than 360 degrees in a high vehicle, the correct 1. can be set. For example, the slip angle is 3
If it is 90 degrees, then 390 degrees - 360' = 30 degrees.

360°-30°=330°. That is, it is sufficient to make the output from the comparator come out at 330°, and when the turning angle is 360°, it is sufficient to make the output match at Oo.

As described above, according to the present invention, by simply selecting the press speed, it is possible to automatically issue a stop signal that takes into account the slip angle, and the press is automatically kept in the fixed position no matter what speed it is used. It can be stopped at

Also, use the encoder to count 1. Since the comparison is made with the sliding angle, it is possible to make a comparison based on 21 degrees, and the accuracy of stopping at a fixed position can be increased. Furthermore, since the number is reset every one rotation, /Flj can also be used for a press with a slip of one rotation or more.

[Brief explanation of the drawing]

Figure (ri) Electrical block diagram of the embodiment of the present invention. 1... Encoder 11. Riet wire 3.4.
5... Counter 12... OR circuit 7.8.9.
... Comparator 13 ... Driver 10 ... Switch patent Applicant: Idaen 7 Nearing Company Representative Patent Attorney Nakayama (11 (1 other person))

Claims (1)

[Claims] an encoder mounted on a rotating shaft that synchronizes with the cycle of the press slide, a counter that counts the output pulses of the encoder and can be reset at 360 degrees, a switch that selects the press speed, and a press speed selected by the switch. An angle selection circuit that selects an angle according to the speed [7] Compares the angle selected by the angle selection circuit with the counted value of the counter [7] When the coincidence and the counted value are equal, either or both A fixed position stopping device for a press machine, characterized in that it has a comparator that outputs a state, and a press stop circuit that operates based on the output of the comparator (stops the press machine ℃).