SU659218A1 - Rolling mill - Google Patents

Description

2, a drive roller 3, a leading ball segment 4, rigidly fixed on the neck of the drive roller, a non-drive roll 5, a driven ball segment 6 fixed on the neck of the roll 5 with the possibility of non-displacement in the axial direction; an elastic element 7, with which the said segments are pressed together. If you press down, it is regulated with the help, 1, raiiKn 8. Rolling rolls with bearings and pillows are mounted in the beds 9. But the number of rolls can be a duo, quarto, multi-roll. Segments 4 and 6 are associated with a roll-joint movable profile joint.

The camp works as follows.

When the drive roller 3 rotates from the main electric motor 1- through coupling sleeves 2, the leading ball segment 4 connected to the drive roller 3 transmits torque to the driven ball segment 6 due to the frictional forces on the contact of segments 4 and 6.

The frictional force at the contact of the segments is created by the compressive force of the elastic element 7. The compressive force of the elastic element is injected by the nut 8.

When reducing or increasing the distance A between the roll axes, the driven segment 6 is moved by the elastic element 7 along the axis of the roll 5. Due to this, the contact between segments 4 and 6 is maintained. Although at these displaced diameters of D the contact points of the segments, their ratio remains constant at any value of A, which means that the ratio of the speeds of the work rolls remains unchanged.

The magnitude of the transmitted torque practically remains constant; since the decrease or increase in the compression of the elastic element with a change in the distance A is respectively compensated for and; 1 and a decrease or increase in the diameters of the contacting points of the ball segmeite.

To ensure that the peripheral speeds of the roll barrels and the normal operation of the rolling mill at idle, it is necessary that the half-sum of maximum j MiiKc and minimum Dch1sh diameters of segments 4 and 6 be 5-10% greater, respectively, of the maximum and minimum distances between the axes of the rolls; Taking into account the sliding of the driven segment 6 relative to the leading segment 4, the ratio of the radii of the balls Rm of these segments should be (1.03-1.05): 1 nrn equal to the diameters of the work rolls and (1.03-1.05) -: 1

At different diameters of the drive DI of the DZ rollers, in the case of not sticking the segments, the radius of the ball Rm of the larger segment must be such that the angle of inclination of the tangent to the horizontal

at the point of maximum diameter, Dmax was greater than the friction angle of the contacting upper bridges, there were segments made from steel, there was no lubrication between them. The coefficient of friction for this case is .11 0.15-0.18, and the angle of friction is respectively 10 ° 15. Then a 11 °. Prn D - ,, a, c: - 550 mm from geomerically ratios

/ max550

: -280 MM.

2 COS and 2 COS 1G

developed by the external element /, should create on the contact of segments 4 and G a frictional force sufficient to overcome MOjVienia friction in a non-driven roller unit (working and supporting rolls) on a hard run of the mill.

The proposed device makes it possible to improve the quality of the rolling surface (less thinning is more equal to the smooth surface), provides good conditions for gripping the strip by rolls, and mixes the power parameters of rolling and repair of parts and nodes of the rolling mill.

Formula and 3 optin

Claims (2)

1. Rolled ethane, containing drive and non-drive work rolls and free-fall gear between them, installed on the roll necks, and also with the fact that, to improve the conditions for gripping the workpiece by ensuring equality of peripheral speeds of the rolls on X. SUSTER move in different solutions rolls, the friction gear is made in the form of spherical segments, facing each other by spherical surface surfaces, in which one of the segments is mounted on the neck of the roll with the possibility of alternation in axial direction and is different to the other This segment is provided with an elastic element equipped with a means for controlling the angle. 2. Rolling mill according to claim 1, I distinguish P with the fact that, in order to ensure equality of the peripheral speeds of the rolls with unequal diameters and compensation and slippage between the segments, the ratio of the radii of the ball surfaces of the spool, its slave and the segmented 1gg are set h .. :( 1,03 -1,05) TO, the radius of the leading segment and the diameter of the barrel of the roller drive, respectively; the radius of the driven segment and the diameter of the barrel non-driving roll, respectively. Sources of information taken into account in the examination 1. KopOvTCB A. A. Mechanical equipment of the rolling shops of black and color metallurgy. - “Metallurgists, 1976, p. 162-163, 410-411. 2. Patent of England No. 1370618, cl. In ZM, 1974. I 1 L