SU596817A1 - Rolled stock length meter - Google Patents

Description

The invention relates to instrumentation, technology, and can be used for the first part of the length of products in the rolling tip. The known rental length meter contains two clamps of the front edge of the rolled products, which are located at a certain distance from one another behind the rolls along the rolling line, the rear edge of the rolled rolled near the rolls, a pulse sensor and a computer with two pulse counters and logic elements 1. However, such a device has a low accuracy of measurement due to the instability of fixing the rear edge of the car and the difficult operating conditions of the retainer osredstvenno in rolls. The closest to this invention to the technical essence and the achieved result is the gauge of the length of the car, containing the locking front edge of the car, installed after the rolls at a base distance from their axis, a pulse converter of the angle of rotation of the rolls, trigger, one of the inputs of which is connected to the locking front rolled edge, pulse counter, the control input of which is connected to the trigger output, two locks of the rear rolled edge, the first of which is set at a distance and the second at a distance of 2 Before the rolls, and AND gate having a first input connected to the output of flip-flop 2. The disadvantage of this arrangement is the long duration of the measurement time which .zakanchivaets only release the trailing edge of the rolling rolls. The purpose of the invention is to reduce the measurement time. For this, a rolling length meter is equipped with a frequency doubler key whose information input is connected to the output of a pulse converter, the first control input is connected to the trigger output, the second is connected to the output of the And element, the double key output is connected to the counting input of the pulse counter, the second trigger input - to the first fixing edge of the rear edge of the car, and the second step of the element and the second fixing device of the rear edge of the product. The drawing shows the block diagram of the gauge length of hire. The proposed length meter contains two clamps 1 and 2 of the rear edge and a clamp 3 of the front edge of the car. The latch 1 is installed in front of the rolls 4 at a distance f from their axis, and the latch 2 - at a distance 2f. The latch 3 is placed behind the rolls 4 in the course

rolled at a distance Is from the axis of the rolls, where the length that is chosen is based on the minimum rolled length and the distance L

A pulse transducer 5 of the angle of rotation of the rolls is mechanically connected with the rolls 4. The output of latch 1 is connected to the zero input trigger 6, the single input of which is connected to latch 3, and the output to the first input of element 7 I, the first control input of the doubler key 8 and with the input of the counter 9 pulses, the counting input of which is connected to the output of the doubler key 8. The second input of element 7 I is connected to a clamp 2, and the output to the second control input of the key doubler 8, whose information input is connected to a pulse converter 5 of the angle of rotation of the rolls 4.

Measuring the length of the rental works as follows.

In the initial position, the latches 1-3 of the edges of the rolled out give zero signals to the external circuits, trigger 6 is in the null state, element 7 is closed, prohibitive signals are sent to both control inputs of the key-double 8 t 8, pulses from the pulse output Converter 5 to the counting input of the counter 9 does not pass.

At the moment of fixation of the front edge of the rental with retainer 3 from its signal, trigger 6 transceiver 3 turns into a single state, in which the direct channel to the doubler 8 is turned on. From this moment, the impulse of the converter 5 through the doubler switch 8 begins to pass to the counter input of the counter 9 without doubling.

At the moment of fixation of the rear edge of the hire of fixer m 2, element 7 I opens from its signal (the other signal is fed with a permit signal from trigger 6). The signal from the output of element 7 also turns off the direct channel and turns on the doubler-doubler channel 8, ensuring from this moment on the counter 9 the number of pulses of the converter 5 doubled.

The measurement ends when fixing the rear edge of the rental with latch I, from the signal of which trigger b goes to the zero state, turning off both control inputs of the doubler key 8. I. The pulses from the transducer 5 cease to flow to the counter 9. The latter issues a fixed it informatsiyu in accordance with the expression

L m N

where f is a constant length, equal to the distance of the fixer 3 from the axis of the rolls 4;

W - scale of the pulse length of the Converter 5;

N is the number of transducer pulses 5 recorded during the measurement time by the counter 9.

This meter allows you to reduce the measurement time of the rental length at the time of its passage by the rear edge of the distance between the retainer 1 and the axis of the rolls 4, which makes it possible to get the final information about the length and make its processing (for example, in the automatic control system of cutting m rolled), is not spent on this additional time. Hence, this length gauge can be used on high-speed rolling mills of high unit power.

Claims (2)

1. The patent of Germany N ° 1252908, cl. 42 5/00, 1967. 2. USSR author's certificate number 310104, cl. G 01 B 7/04, 1971. S