SU841809A1 - Apparatus for controlling cutting mechanism of straightening-and-cutting off automatic machine - Google Patents

Description

(54) CONTROL MECHANISM DEVICE FOR CUTTING THE CORRECT-CUT-OFF AUTOMATIC

These pulses arrive at the clock inputs of the bar length counter 7 and the cut signal shaping counter 3. Pre-selection of the required bar length is performed by setting device 2. When the above-mentioned counters of the number of pulses are filled with a certain task, signals are generated at their outputs that perform the following functions: commands are sent to the Kjehanism 4 cuts from the counter 3 to generate the control signal and to reset the error indicator-6 The cut signal shaping counter 3 is brought to the zero state. From the bar length meter 7, a pulse is applied to the counting input of the trigger 11, which through the element 9 coincides with the pulse from the bar displacement sensor 1 to the clock of the meter 6 error indicator. The magnitude of the overrun is simultaneously recorded by the counter 3 of the cut signal formation.

At the moment of cutting, the cut sensor 5 generates a signal that sets the bar length counter 7 and, to the zero state. arriving at the estimated input of the trigger 11, sets it to the initial state, while the trigger 11 imposes a ban on the passage of pulses through the elements 9 and 8 of coincidence. From this moment the counter of the indicator indicates the value of the positioning error until the next signal from the counter of the formation of the signal 3 mistakes. By the end of the cut, the amount of overrun is recorded in the control signal generation counter 3. The next signal from the output of the counter 3 of the control signal is fed to the mechanism 4 cuts with a lead on the value of the previous overrun.

Thus, the system takes into account the inertia of the mechanism 4 cuts. The bar length meter 7 displays the true length of the straightened bar, since it starts counting from the moment of the cut according to the signal of the cut sensor 5.

The device operates in the same way as described above in all cases of a positive error value.

If the signal from the cut sensor 5 arrives at the counting input of the trigger 11 before the signal from the output of the counter 7 LENGTH of the bar, the device works in the next 5 |} way.

Match element 8 receives the resolution signals from trigger 11 and

sensor 5 cut. Pulses of the generator 10 pulses Fill the counter b of the magnitude of the error, which is held in the zero state preliminarily by the counter 3 of the formation of the control signal. At the same time, the pulses from the generator 10 are fed to the input of the counter 7 of the bar length. When the latter is filled to the value of the task from its output, a signal is generated, enumerating the trigger 11 to the initial state, prohibiting elements 9 and 8 of coincidence.

The frequency of the generator 10 ensures the filling of the counter 7 of the length of the rod and, accordingly, the counter-indicator

6 magnitude of the error during the pulse duration of the sensor 5 cut. The rear edge of the setpoint adjuster 5 provides resetting the counter 7 Bar lengths. Error sign is formed in

counter-indicator b error depending on the channel filling the counter (from the element 9 of the match or the element 8 of the match).

The device of the proposed design has a high accuracy and ease of use.

Claims (1)

1. Copyright certificate 498107, cl. On 23 D 25/16, 1973. Inpulsk Signal ijnfaBftHiifi