SU1586811A1 - Roll set for strip multihigh rolling mill - Google Patents

Abstract

The invention relates to rolling production, in particular, to multi-roll cold rolling mills. The aim of the invention is to reduce the power parameters by reducing the contact stresses between the rollers and the strip. The roller unit of the multi-roll mill includes work rolls 1 and thrust bearings 2 and 3. The outer ring of the bearing is made of two parts, with the upper part offset from the bottom with an eccentricity of 0.002 ... 0.035 of the diameter of the outer ring of the bearing. 1 ill., 1 tab.

Description

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The invention relates to rolling production, in particular, to multi-shaft hoiad rolling mills.

The purpose of the invention is CHiixeime power parameters by reducing the contact stresses between the rolls and the strip.

The drawing shows schematically a roller knot ..-.

The roller unit contains upper and lower cylindrical mill rolls 1, the ends of which abut against thrust bearings 2 and 3, made of two parts, with the upper part of the upper carrier 15 being displaced with eccentricity e (O, 002-0.035) d, and the corresponding parts of the left and right bearings are located in the back of20

Roller node works as follows.

When the strip is rolled by the action of the bearing 2, the upper roller is displaced to the left, and under the action of the bearing 3 7f the lower roller is displaced to the right. As the sticks are rotated when the bearings are rotated, the bearings rotate the bearing 2/2 turns, the upper roller moves to the right and the lower roller to the left. In this way, in one turn of the axle rolls, the swaths perform one longitudinal oscillatory motion in the protrusion phase. In this case, the mechanical bonds of the surface of the rolls and the strip are broken and the contact stresses of the research institute, rolling force and torque decrease.

The operability check of the roller unit is carried out on a two-roll mill with a diameter D of 100 mm and thrust bearings with a diameter d of 60 mm. Rolled strips of aluminum with a thickness of E, 3 mm, width B c mm SO and a thickness of i / lh-iiOjS mm. Emulsol T is used as lubricant 5. Circular speed of the rolls is 60 rpm. In the experiments, were bearings with an eccentricity of external cages e (0.001-Oj056) d. Ipu rolling P onredoshot mesdozov teisometric sensors,

Average pressure is calculated on the formula.

35

Pep

where IQ is the length of the contact arc and the deformation zone.

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15

20

7f Q

„5 l

five

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

As can be seen from the table, when rolling a strip without longitudinal oscillations of the rolls (experiment 1, e 0), the average pressure PO is maximal and equal to P c 12 bMPa. When rolling with longitudinal oscillations of the rolls, the average pressures in all cases turned out to be less than in experiment 1, but the most noticeable decrease in Pcp is observed at e 0.12-2.1 mm. Under these conditions, Pcp 108–89 MPa, which is 14.2–29.3% less than in Experiment 1. A further increase in eccentricity, e, has practically no effect on the change in Pcp.

Thus, when rolling in shafts with an e. Of 0.12 mm, there is no significant effect of reducing the contact stresses due to the insufficient displacement of the rolls and the change of the friction force vector in the deformation zone. When rolling in rolls with e 2.1 mm, the influence of oscillations compared to e 2.1 mm is almost the same as in intensive roll wear due to significant slip across the strip width. Therefore, the bearing eccentricity is within e 0, 12-2.1 mm or e (05002-0,, 035) d.

Pricing the proposed roller unit at the twenty-shaft cold rolling mill will ensure a reduction in power consumption by an average of 21.6%.

Claims (1)

Invention Formula „5 l five The roller unit of the strip multi-rolling mill, comprising upper and lower cylindrical rolls and thrust bearings with rings placed at their ends, characterized in that, in order to reduce the strength of the parameters by means of contact stress, the outer rings of the bearings are made of upper and lower eccentric rings, each of which interacts with the end of a single-shaft rolling roll, with the eccentricity of the outer rings of the bearing (0.002-0.035) of the diameter of the bearing ring. Editor A.KoEoriz Compiled by V.Vasilyeva Tehred L, Serdyukov and Proofreader L. Pilipenko Order 2386 Circulation 401 VNIIGSH of the State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 4/5, Moscow, Zh-35, Raushsk nab. 113035 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 Subscription