SU379075A1 - METHOD OF EDITING INGOT - Google Patents

Description

one

The invention relates to ferrous metallurgy and, in particular, to weed ingots, cast in curved tile type continuous casting plants. The dressing is carried out with a leveling cage containing at least two bending rolls and one support roll. The cast ingot moves through a curved guide, ino the exit from which it is guided and guided along a horizontal or arc-shaped roll table.

However, the known straightening method allows the ingot to be subjected to bending forces in the zone before and after the correcting device, the bending moments lead to the ingot stretching and cracks forming on its surface, as well as to an overloading guide device, which for this reason is cumbersome. This method of straightening especially affects when straightening an ingot with a liquid core.

The purpose of the invention is to increase the quality of the ingot, while the ingot, before and after the dressing zone, always remains free from the action of the bending myent.

The essence of the proposed method is that the ingot that leaves the curvilinear guide is governed by at least two bending rolls and a support roll. The difference in what is recorded, for example, with the help of a mesdose, bending moments acting on the ingot in the zone before and after the instrumentation and deviating the readings from the nominal value regulate — vertically the position of the bending roll installed behind the support roll after of which, if the nominal value is not restored, continue the regulation by simultaneously turning all the rolls around the horizontal axis located at the entrance

Correct-t the device in the direction opposite to the vertical adjustment of the bending 1 roll.

The drawing shows a vertical section of a straddle stand that allows this method to be carried out.

The ingot / exits the stationary curvilinear-guide device 2, having a radius R and is guided to the correct-leaning stand 3, where it is governed and brought out

horizontal direction in the form of an ingot. In the frame of cage 3 there is a support roll 4, a bending and a nagging roll 5, t a nudging rolls 6 and 7 and a bending and a tapping roll 8. A straightened ingot is fed to the roller table 9. The rolls are located in beads 10, 11, 12, 13 and 14 The drive of the support roll 4 is designated 15, and the roll 4 can be mounted on castings of various thicknesses. Rolls 5, 6 and 8 are equipped with hydraulic cylinders 16, 17

and 18. The right-sided stand can turn as a whole around the pins 19, 20, horizontally mounted in the frame of the cage 3. The axes of the pins 21 parallel to the axis of the roll 4. The bending moments acting on the ingot 1 outside the bend zone are fixed by the mechanism 22, located between the stupid 23 of the stand frame and the displacement hydraulic cylinder 24, which serves to turn the stand 5 around the trunnions 19 and 20. The lock 22 is set so that its nominal value (zero value) corresponds to the position of the work, which is characterized by the fact that ingot 1 in the zone between nap Aulus guide means - 2 and the roll 4 and the straightened strip 1 in the area between the roller 8 and roller conveyor 9 remains svobadnym from bending stresses. The change in the indications of the meso dose 22 is used to change the position of the rolls 5 and S, with respect to the ingot 1, as long as it is nominal. the value (zero value) will not be reached again, i.e. until the controlling device 2 is free from bending (Moments. The position of the roll 4 remains practically unchanged. If the output ingot 1 rises from the roll table or pushes the roller table As a result, new bending moments appear in the zone between roller 8 and roller table 9, then these bending moments create changed indications of the mesdose, 22, i.e. a deviation from the nominal value (zero) in the direction of plus or minus sign is formed. The movement of the roll 5 in the vertical direction will probably take up the position of the roller table 9 in such a way that the bending forces will be removed and the indications of the mass doze 22 will return to the nominal value (zero). In this case, the ingot / will load the roller 9 only by its own weight. The changes in the readings of the Mesozoz 22 can be associated with bending moments acting on the ingot in the area between Device 2 and Roller 4 or in the area between the roller 8 and the roller table 9. When there is a deviation From the nominal value (zero value), automatic control is first crimped to move the roll 5 vertically. Such automatic control devices are known. If the means of moving the roll 5 the readings of the dose dozens return to the nominal value (zero), then the reason for the change of the readings is the bending moment that occurs after the roll 8. If the deviation of the nominal value (zero) as a result of moving the roll 5 will not be eliminated and vice versa increases, the reason for the change in the indication should be sought in the bending moment that occurs in front of the roll 4.

In this case, the automatic control works as follows.

Subject invention

Claims (3)

1. The method of editing the ingot coming out of curved guide device 65 continuous casting plants, including As soon as the limit value, t. that is, the predetermined maximum deviation from the nominal value (zero value) is exceeded, then the additional displacement hydraulic cylinder 24 is put into operation. With the help of the hydraulic cylinder 24, the cage 3 rotates around the horizontal axis of the trunnions 21 in the direction opposite to that of the roller 5 and at a higher speed, therefore, the displacement of the roll 5, which has been driven in the wrong direction, is quickly corrected. When the stand 3 is rotated, when the indication of the mesdoz 22 returns to the nominal value (zero value), it simultaneously ends with the movement of the roll 5 and the stand 3. The deviation of the indications of the mesdoza to the sluice value can occur for two reasons. First, the rolls 5, 8 can be higher than the bending lines would have, in this case a moment occurs in the guide device 2, which exerts an additional force on the roll 5. Secondly, the outgoing ingot 1 will not be straightened enough and therefore it will rise from the roll table 9. The resulting moment causes an increase in pressure in the space 22. The automatic control will cause the roll to rise 5. If the readings do not return to the nominal value (zero value). ) and the pressure, on the contrary, will continue to increase, the cause should be sought in the overestimated position of the rolls 5, 8 relative to the bend line. Since the readings will exceed the limiting value, the cage 3 is turned downwards in the direction opposite to the movement of the roll 5. This eliminates the bending moment acting on the ingot / through the guiding device 2 and causing the readings of the dose. 22. If the readings are if the dozens of the 22 deviate, conversely, to the negative value, which means pressure reduction or unloading of the cage 3, in this case the automatic control lowers the roll 5 and then, if this measure turns out to be wrong, the additional first cage 3 upwards rotation until clatter indications not returned to the nominal value (zero value), the above-described automatic control of the movement of the roll stand 5 and rotation 3 is particularly advantageous when the cage is at the same time t nuschey and correct. In addition, the rolls 5, 6 can simultaneously be rolling rolls, which give the ingot a certain profile after it has hardened. However, the rolls 7, 8 can also be located separately, performing the functions of pulling or pulling and rolling rolls. The secondary action of the supporting and bending valzko of the correcting device, characterized in that, in order to improve the quality of the ingot, the deviations from the specified bending moment, acting on the ingot, are measured in the zone before and after the equalizer and by its Signal control the position of the rolls. 2. A method according to claim 1, characterized in that, in order to preliminarily eliminate the cause of the bending moment, the position of the bending roll, installed behind the support roll, is controlled vertically. 3. Method according to PL. 1 and 2, characterized in that, in order to finally eliminate the cause of the bending moment, the position of all the other vortices is controlled by simultaneously rotating them around a horizontal axis located at the entrance of the correcting device in the direction opposite to the vertical movement of the bending roll .