JPS59209407A - Rolling facility rolling flat steel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rolling equipment for rolling flat steel, which is provided with at least three stands combined into one rolling block, The stand has roll pairs of smooth rolls angularly offset from each other by 90', the roll pairs being separately drivable and roll gap adjustable symmetrically with respect to the roll axis; The present invention relates to a roll pair arranged corresponding to the narrow side of the steel, which cooperates with a movable rolled material guide for guiding the wide side of the flat steel.

BACKGROUND OF THE INVENTION In order to produce steel bars with a rectangular cross section, so-called flat bars, which are now required in large quantities with various cross-sectional dimensions, continuous rolling is carried out using a plurality of roll stands arranged in a row. Machine (Federal Republic of Germany Patent No. 91616
It is known to form relatively compact rolling blocks (DE 23 26 723) or relatively compact rolling blocks (DE 23 26 723). In such rolling mills, however, the roll stands are fixedly aligned with one another and the direction of passage of the rolled material must always be the same.

In the case of large-scale production, a separate roll stand is provided for each piece of material required to obtain the final cross-section from the initial cross-section, and the rolled material passes through these many roll stands over a correspondingly long distance. It must be passed through while being turned around and turned. Although the extremely long rolling equipment formed by this method is expensive to manufacture, it can only roll steel bars with a specified cross section, and changing the rolling program requires large-scale replacement work. is necessary. Furthermore, due to the long transit times, it is necessary to carry out intermediate heating in order to avoid premature cooling of the rolled material and edge breakage.

German Patent Application No. 2 254 676 discloses a reversible roll stand,
However, the roll stand is mainly used as a jingle stand and is suitable only for machining one of the sides, ie the width or the height, of a flat steel. The range of use of this known roll stand is limited from the outset, since the rolling material guide arranged correspondingly on the other side can only be adjusted in movement to change the rolling 70 grams and not after each pass.

OBJECTS OF THE INVENTION It is an object of the present invention to provide an apparatus which is distinguished by the fact that it requires only one pass in an extremely small space, and which, because of its consecte structure, can achieve an extremely short transit time;
To provide rolling equipment that guarantees the rational production of flat bars and can also produce square bars with square to extremely rectangular cross sections without troublesome replacement work.

DESCRIPTION OF THE INVENTION In order to achieve this object, the present invention provides a rolling mill of the type mentioned at the outset, in which all roll stands are reversible and whose displacement can be adjusted symmetrically with respect to the roll axis. Guides are located before and after the pair of rolls belonging to the rolled material guide, and a roll drive device, a drive device for adjusting the roll gap, and a drive device for adjusting the movement of the rolled material guide are used to control the E-rolling of the rolled material. After each pass through the block, it can be controlled by a numerical control device in accordance with a defined rolling program such that the direction of passage is reversed for continuous area reduction.

Example The invention will now be described in detail with reference to the drawings.

The rolling equipment shown in FIG. 1 consists of five roll stands 2, 3 combined into one common rolling block 1, each of which has a pair of roll stands 2, 3. Each roll stand 3 has a pair of vertical smooth rolls 5. The roll pairs 4, 5 can be driven independently of each other, in which case the hook drive consists of an alternating current motor 6, an adjustable hydraulic cylinder f7 and a hydraulic motor 9 connected via a hydraulic line 8 to a hydraulic pump 7. This hydraulic motor 9 fully rotates the rolls 4 and 5 via a transmission 10 and a cardan shaft 11. In this case, the roll rotation speed can be varied steplessly by changing the rotation angle of the adjusting pump 27 (hydraulic pump 7), and the direction of rotation of the roll can also be reversed via this adjusting pump.

The rolls 4, 5 are mounted on roll stands 2, 3 with an adjustable roll gap, for which purpose the roll bearings 12 of each roll pair can be shifted symmetrically with respect to the roll center via an adjustment gear 13. can. This adjustment transmission bag #13 is driven via a hydraulic motor 14. This hydraulic motor 14 is equipped with a hydraulic valve and a supply conduit 15.
Via a common hydraulic pump 17 connected to the electric motor 16, pressure medium is also supplied.

Rolling flat steel by sliding rolls 4 and 5 / Rolling material guides 18 are assigned to the vertical rolls 5, and these rolling material guides 18 roll the narrow sides of the flat steel. It guides the wide side of the flat steel to prevent turning of the flat steel during rolling. In order to adapt to different cross-sections, these rolling stock guides 18 can be adjusted vertically, and this adjustment is likewise connected via hydraulic valves to the supply line 15 and to the hydraulic cylinder 7''17. As shown in FIGS. 2 and 3, the rolling material guide 18 each consists of two L-shaped sections 18' forming a rectangular cross section 20, both of which have a rectangular cross section 20. The horizontal guide leg 8" of the shaped part 18' projects into the nip between the rolls in the form of a tongue, and the rollers are held in a manner not shown in order to avoid damaging the surface of the rolled material. good. The L-shaped part 18' is attached to a vertical guide 21, and a rack 24 fixed to the L-shaped part 18'
By means of a displacement adjustment shaft 22 cooperating with the motor 1 through a pinion 23, they can be moved in mutually opposite directions. For this purpose, the displacement adjustment shaft 22 is drivingly connected to the hydraulic motor 19.

A rolling block having a pair of horizontal smooth rolls 4, a pair of vertical smooth rolls 5, a reversible roll drive, and an adjustable rolling material guide 18, and with adjustable roll gap. In l, multiple ・
The rolling can be carried out continuously without any breaks, and by repeating the passes in the opposite direction, it is possible to roll an arbitrary number of grooves and to obtain very different flattened cross sections. The hydraulic pump 7 of the roll drive, the hydraulic valve for the hydraulic motor 14 for adjusting the roll gap, and the hydraulic valve for the hydraulic motor 19 for adjusting the displacement of the rolled material guide 18 are connected in each case by corresponding control lines 26, 27. A numerical control device 25 controlling via the control console 28 synchronizes the roll rotation direction, roll rotation speed, roll gap value and rolling material guide movement adjustment value with respect to the rolling program inputted by the control console 29. Control the adjustment value. As a result, a functionally reliable course of rolling of the flat steel is ensured in a reversible compact rolling block consisting of several roll stands.

Effects and Effects of the Invention As can be seen from the above description, the present invention is a continuous and reversible roller that can perform a large number of passes corresponding to the number of roll stands each pass. A rolling mill is obtained. Owing to the reversibility, it is also possible to carry out only an arbitrary number of passes with this rolling mill; the rolled material need only be fed through the rolling mill in both directions the corresponding number of passes. By using smooth roll pairs with adjustable roll gap and offset by 900 degrees in each case, it is possible to roll flat steel with any rectangular cross section;
Still, the rolling stock guides ensure that the rolling stock does not swivel or deviate from the center of rolling, even with very small cross-sections, so that virtually everything from the initial billet to arbitrary flattened cross-sections can be It can be carried out in a reversible rolling mill. In order to readjust the roll stands after each pass of the rolled material and to align the roll stands with one another for the purpose of continued processing when changing the pass direction, the respective drives and displacement adjustment drives are alternated via a numerical control device. It is controlled depending on the direction of passage and the successive processing steps. This numerical control allows programmable adjustment and monitoring of the individual drives of the rolls, roll gap adjustment and rolling material guide sump, and also facilitates and accurately selects different rolling programs. A smooth rolling process is guaranteed. This makes it possible to produce flat steel in a very short time and very rationally, and it becomes possible to install the entire rolling plant with reversible rolling blocks in one relatively small space.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically showing a rolling equipment according to the present invention;
FIG. 2 is a horizontal sectional view of the rolled material guide, and FIG. 3 is a front view of the rolled material guide.

Claims (1)

[Claims] A rolling installation for rolling flat steel, comprising at least three roll stands combined into one rolling block, the roll stands consisting of smooth rolls angularly offset by 90° from each other. It has a pair of rolls, these roll pairs can be driven separately and the roll gap can be adjusted symmetrically with respect to the roll axis, and the roll pair arranged corresponding to the narrow side of the flat steel is In cooperation with a movable and adjustable abrasive guide for guiding the wide side of the steel, all the stands (2, 3) of the rolling block (1) are reversible and the roll Abrasive guide (18
) are located before and after the pair of rolls (5) belonging to the abrasive guide, and include a roll j drive device, a drive device for adjusting the roll gap, and a drive device for adjusting the movement of the abrasive guide (18). Or, after the rolled material passes through the rolling block (1), the passing direction can be controlled by the numerical control device (25) so that it is reversed each time according to a prescribed rolling program to continuously reduce the area. A rolling equipment for rolling flat steel, characterized by: