SU1586810A1 - Roll set for sheet-rolling stand - Google Patents

Abstract

The invention relates to rolling production, in particular to sheet rolling rolls. The goal is to reduce the power and power parameters of rolling by reducing the friction forces while creating longitudinal vibrations of the roll. This is achieved by the fact that in a roller assembly comprising two rolls, the first of which has end thrust assemblies, the end surfaces of the second roll are inclined in one direction with a slope of 0.01 ... 1 °, and the length of the roll barrel is equal to the distance between flanges of the second roll. 1 tab., 1 Il.

Description

The invention relates to rolling production, in particular to sheet rolls.

The purpose of the invention is to reduce the power-bearing parameters of rolling by reducing friction forces when creating longitudinal vibrations of the roll.

The drawing shows the roller unit.

The roller unit includes a roller 1, the end planes of which are inclined in one direction with an angle of inclination (0.01-1 and roller 2 with end shoulders Zo. The length of the barrel of roller 1 Lg is equal to the distance L. between the shoulders of roller 2 with allowance for on a sliding fit,.

Roller node works as follows.

After installation in the cage in the position shown in the drawing, the process of rolling the strip 4 begins. When the rollers rotate from the bottom roll 2, the inner surface of the left shoulder 3 acts on the end of the upper roll 1 and shifts it to the right (to the right shoulder). Since the lengths Lg and L are the same for Cc, taking into account the gap), the upper roll floats freely between the left and right shoulders. For one turn the upper roll. performs two axial displacements (one oscillation) relative to the lower roll. With oscillatory movements, the metallic bonds on the contact of the strip and the rolls are broken and the longitudinal friction forces are reduced. To ensure a reduction in the longitudinal friction forces, small longitudinal oscillations of the rolls are sufficient.

The operability check of the proposed unit is carried out on a two-roll mill with roll diameters D 100 100 mm and D. 116 mm. Rolled strip of aluminum with a thickness of Ni; 1.3 mm,

(L

with

width 50 s with compression B. 0.3 mm. An emulsol is used as a lubricant. The circumferential speed of the rolls of 60 rpm provides n 60 vibrations per minute. However, in the process of rotation, the rollers are constantly moving along the wasps and, which ensures permanent destruction of metal (mechanical) bonds, n. rolls with an angle (f

account of longitudinal oscillations of the rolls. The rolling time in the rolls with " 1 effect of the oscillations as compared with Cf 1 i is almost the same, but leads to intensive wear of the rolls due to significant slip across the strip width. Consequently, the optimum angles of inclination of the inner surfaces of the shoulders are angles equal to e) 0.01-1 °.

The application of the proposed roller node on the cold rolling mill 1200 reversing mill compared to

 .fcjjj.i. v. k t l j

 0.005-1.5. The results of experiments known to provide a reduction in consumption

put in the table. The rolling force of the Electricity is approximately 22% determined by means of strain gauges with strain gauges. Mean pressure P

calculated by iJjOpNryjTe RS - P / lj -B.

wed

20

by reducing the average pressure and rolling force,

 The table shows the results of experiments to determine the effect of vibrations of the roll on the force parameters of deformation,

where 1b is the doyna of the contact arc, and the magnitude of the longitudinal displacement of the roll by the formula

and D, tg (f.

As can be seen from the table, when rolling a strip without., Longitudinal oscillations of the rolls (test 1, a 0), the average pressure P. .. is maximal and equal to P t I2i Sha. When rolling with long 1 oscillations of the rolls, the average pressure is less than in experience, but n: the most noticeable decrease in P (–p is observed at 4 0.01–1 (, 02–2.02 mm)). Under these conditions, P c is obtained - 101–88 Sha, which is 16 , 5-27j3% less than in experiment 1; a further increase in C 1 ° has almost no effect on the change

 The table shows the results of experiments to determine the influence of the vibrations of the roll on the force parameters of deformation,

The rolling node of the sheet rolling mill, containing two cylindrical rolls, one of which is equipped with shoulders, interacting with the ends of the second roll, is characterized by the fact that the face planes create longitudinal oscillations of the roll; the second roll is inclined in

 ONE direction at an angle of 0.01-,

Formulas

the invention

35

 The roll knot of a sheet rolling stand containing two cylindrical rollers, one of which is with shoulders interacting with the ends of the second roll, characterized in that, in order to reduce the power rolling parameters by reducing frictional forces during the creation of longitudinal vibrations of the roll, 0.01 ° is not observed. The effect is made oblique in one folder reducing the contact of the axial directions of the axis at an angle of 0.01-1.0.

l-wed

So when rolling in

868104

account of longitudinal oscillations of the rolls. When rolling in rolls with " 1, the influence of oscillations compared to Cf 1 i is almost the same, but leads to intensive wear of the rolls due to significant slip across the strip width. Consequently, the optimum angles of inclination of the inner surfaces of the shoulders are angles equal to e) 0.01-1 °.

The application of the proposed roller node on the cold rolling mill 1200 reversing mill compared to

 .fcjjj.i. v. k t l j

15 known reduces rahod

electricity by about 22%

20

by reducing the average pressure and rolling force,

 The table shows the results of experiments to determine the effect of vibrations of the roll on the force parameters of deformation,

The rolling node of the sheet rolling mill, containing two cylindrical rolls, one of which is equipped with shoulders, interacting with the ends of the second roll, is characterized by the fact that the face planes create longitudinal oscillations of the roll; the second roll is inclined in

 ONE direction at an angle of 0.01-,

Formulas

the invention

Claims (1)

SUMMARY OF THE INVENTION · A roll unit of a sheet rolling stand containing two cylindrical rolls, one of which is with collars, • interacting with the ends of the second roll, characterized in that, in order to reduce the energy-force parameters of rolling by reducing friction forces when creating longitudinal vibrations of the roll, the ends the second roll are made inclined in one direction at an angle of 0.01-1.0 °. ”' ^{L, lv} ** ^s Experience f Η mm τ Δ h, mm 3 12, ΜΜ 4 Ρ, κΙΙ ^R cf., MPa 6 hail 7 a _s mm 9 1 1, 30 0.31 3.91 23.6 121 0 0 2 Ts31 0.32 3.98 '23, 1 117 0.005 0.01 3 1, 30 0.33 4.05 20.3 101 0.01 0.02 4 1, 32 0.34 4.08 19.6 97 0.7 1.42 5 1.30 0.34 4.08 19.5 95 0.83 1, 67 Table continuation f 2 3 4 ί ί 7 8 6 1.31 0.35 4.16 18.8 90 0.92 1.86 7 1.3! 0.36 4.22 18.6 88 1,0 2.02 8 1, 32 0.36 4.22 18.5 88 1.23 2.49 9 1, 31 0.36 4.22 18.5 88 1,5 3.04