SU925456A2 - Method of controlling interstand tensions - Google Patents

Description

A0, 1L of block 14, it is possible to set zero initial conditions on input 20. Signs "in the diagram indicate the current values of values, and the absence of these signs indicates fixed values of values.

The scheme works as follows.

When the front end of metal 1 is not displaced to position 10, but the sensor 6 is not in contact with the signal from sensor 7, unit 8 calculates the value of static

current / s. proportional to the moment of free rolling in the cage 2.

After the rental has been captured by cage 3, block 9 calculates the difference

static currents D / s before and after the capture of rolled metal by cage 3, the value of which A / s is memorized in block 13 in the Novozhenin II front end of the metal.

If (tension), then the correction speed reference UC, formed by block 15, should reduce the speed of the drive 5 of the stand 2 (), and in the case when A / s 0 (back pressure) the speed of the drive 5 should increase (), i.e. signs a / c and juice are opposite. The block 19 forms the task of a trial change in the speed of an asoc module, specified by the block 17, and a sign defined by the sign A / C in the direction of working out the corrective task of the speed wk.

Thus, the condition

sign A (-signwK - - sign D / s.

At the same time, when rolling thin strips that allow a slight compressive force (backpressure) due to the possible formation of a loop, a trial change in the velocity of Yes) at small tensions is worked towards its further reduction and may cause unacceptable backpressure values. To avoid this, when supplying Asos, the condition where a is the dead zone should be observed.

In the case when, Asog Oh, in | AsOz

block 15 relation

is determined

IA / C A / s

by taking into account the initial value of this block 14 at input 20 (in the first pass after power up) or by the value of IA / C and the crease in previous passes.

Measurement | D / s

when serving

produced at each pass at position 12 of the front end of the metal 1 and stored in block 14. At the same time

A corrective speed reference WK is applied, determined by block 15 according to the algorithm

---AND

this.m., the task Aoj:,.

The technical and economic effect when applying the proposed method is achieved by reducing the adjustment time, since at the moment of switching on the correctional setting of the speed "JK, the value

setting the speed difference with a to-asoz, which allows rolling a large part of the strip with minimal tension, providing increased rolling accuracy. So, at Asos 0.02 o) s, the value of speed testing decreases by 2 (oi 0.04 (0 s, which (at the drive acceleration time to the main speed / 4 s)) reduces the control time by

, 04w3-4, 16s

At rolling speeds and 10 m / s, additionally with minimum tension

will be rolled

& L V А / р 10 0.16 1.6 m of the strip length, which will make it possible to additionally take out 1500 seam meters of rolled products in a given tolerance field per year.

Thus, the annual economic effect will amount to 1500X3.5 5250 rubles, (3.5 rubles - the average cost of a foot meter auto-obd).

Claims (1)

1. USSR author's certificate No. 810319, cl. B 21 B 87/06, 1979. 1C