SU1577899A1 - Working stand for rolling flanged shapes - Google Patents

Abstract

The invention relates to rolling production, in particular, to structures of rolling stands equipped with lead-ins (roller reinforcement), and can be used on section rolling mills. The aim of the invention is to increase productivity by increasing the service life of the wiring for a rolling task with a curved front end. In the rolling stand of the flange profiles, the horizontal wiring roller is made with a central annular groove, the shape of which is equidistant to the surface of the lower mill roll of the stand, which allows the wiring to be brought closer to the capture plane of the metal and thereby reduce the wear of the wiring pass. 3 ill., 1 tab.

Description

I

(21) 4418559 / 23-02

(22) 02.29.88

(46) 07.15.90. Bhl. No. 26

(71) Institute of Ferrous Metallurgy

(72) V.D. Nashivanko, N.A.Bogdanov, A.P.Lokhmatov, E.V.Sivak, S.M. Zhuchkov, L.V. Kulakov, V.V.Vishnevetsky

and O.E. Petlkov

(53) 621.771.067 (088.8)

(56) Chekmarev A.P. and other Roller armature rolling mills. M .: Metallurgi, 1964, p. 58.

Modern designs of roller valves for rolling mills. Album NIIInformt zhmash. / Ed. N.F. Gritsuk, 1968, p. 112

(54) ROLLED STABLE FOR FLANGE PROFILES ROLLING

(57) The invention relates to rolling production, in particular, to structures of rolling stands equipped with lead-in wiring (roller reinforcement), and can be used in section rolling mills. The aim of the invention is to increase productivity by increasing the service life of the wiring for a rolling task with a curved front end. In the rolling stand of the flange profiles, the horizontal wiring roller is made with a central annular groove, the shape of which is equidistant to the surface of the lower mill roll of the stand, which allows the wiring to be brought closer to the grip plane of the metal and thereby reduce the wear of the wiring pass. 3 ill., 1 tab.

With s

(L

The invention relates to rolling production, in particular, to structures of rolling stands equipped with lead-ins (roller reinforcement), and can be used in section rolling mills.

The aim of the invention is to increase productivity by increasing the service life of the wiring for a rolling task with a curved front end.

FIG. 1 shows schematically the proposed rolling stand; in fig. 2 is a section A-A in FIG. one; on fig.Z - section bb in fig. "one.

The rolling stand contains frame 1, calibrated upper 2 and lower 3 rolling rolls, forming a closed flange profile. On the attachment beam 4, an input wiring is installed, comprising a housing 5, an introduction funnel 6, a left 7 and right 8 guide rails, an upper 9 and a lower 10 skips. The lower pass carries a horizontal roller 11 with a central annular groove, the shape of which is equidistant to the shape of the lower 3 mill roll.

The device works as follows.

The roll coming from the previous cage is caught by the wiring funnel 6, then moving between the two guide lines, the upper and lower gaps, falls on the horizontal roller 11, installed

ate 1

00

& with

on the lower pass so that its working surface is higher than the bottom pass working surface. In this case, the rolling deviates upward, reduces the contact surface with the lower pass 10, reducing its wear, and after contact with the upper pass 9 is directed to the caliber of the rolling rolls.

The horizontal roller 11. minimizes the distance between the wiring and the rollers, and thereby reducing the distance between the surfaces of the horizontal roller and the lower mill roll, reduces the contact surface of the rolled product with the upper skip 9. Thus, the service life of the upper skip increases.

In the case of flange rollout with an IC with a curved front end, the horizontal roller 11 should be brought closer to the plane of the axes of the work rolls of the stand, or the distance between the axes of the lower work roll 3 and the horizontal roller 11 should be increased to increase the wear resistance of the upper and lower passes. bring the meeting line of the bent front end of the roll to the surface of the caliber of the upper roll 2 and the plane passing through the axes of the work rolls, thereby eliminating the possibility of rolling the roll into rolling th stand. This reduces the wear of the lower 1.0 and upper 9 wiring passes: the lower — due to the fact that the working surface of the roller 11 is higher than the working surface of the lower 10us upper pass — by reducing the length of the surface section of the upper skip 9 located in the immediate vicinity of the upper roll 3 rolling stands and reducing wear and its effect on the likelihood of an emergency — drilling.

The distance between the axes of the roll 3 and the roller 11 in the plane passing through

0

five

Jq 5

thirty

35

40

the cutting axis of the lower roll and the roller, determined from the expression

., d + D

.-.

The coefficient c is selected from the technological conditions of production. The lower limit is chosen from the condition that there is no rubbing of the lower roll and the horizontal roller, the upper limit is due to the condition of minimizing the length of the upper skip section, which is subject to considerable wear.

The invention has been tested under the conditions of the continuous small-section-wire mill 320 / / 150.

The table shows the test results.

Thus, the choice of the coefficient c, equal to 1.05-1.15, contributes to an increase in the service life of the transaction.

Claims (1)

Invention Formula Rolling mill for rolling flange profiles containing mill rolls whose profile forms a closed gauge, the frame on which the lead-in wiring is installed, containing upper and lower gaps, the last of which carries a horizontal roller, which is designed to increase productivity the service life of the wiring when the task of rolling with a curved front end, the horizontal roller is made with a central groove, the shape of which is equidistant to the profile of the lower mill roll, and n 1 at a distance from it, was determined by the relation emom d + D I -f --- 12 , 05-1.15 d D coefficient of proportionality; horizontal diameter, mm; diameter of the bottom mill roll, mm. FIG. 2 Bb FIG. 3