JPS60191603A - Rolling method of bar steel - Google Patents

Abstract

PURPOSE:To permit easy schedule change and to decrease loss time by shifting the molding caliber meeting a product size in an axial direction in such a way that the caliber coincides with a pass line and rolling the material in a flat part in an upper stream stand. CONSTITUTION:A caliber F3 for finishing of a roll R8 is newly made to coincide with a pass line PL in the stage of producing a product W3. Rolls R6, R7 are shifted to make the flat part 30 of the roll 6 and the caliber L2 prior to finishing of the roll R7 to coincide with the pass line PL; further, the gap of each roll and guide gap are changed. A billet is successively drawn by the rolls R3- R6 and is subjected to working prior to finishing by the roll R7 and finishing by the roll R8 and thereafter the billet is taken out as the product W3 on the outlet side of the roll R8.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention aims at
Items to be preserved wI) Concerning the lower rolling method, in particular, 1) it relates to an electrically controlled rolling method that allows the pass schedule to be freely changed in accordance with each product.

(Prior art) When rolling multiple sizes of long steel products with multiple roll stands arranged along a pass line (trajectory of the rolling mill), the rolling process is performed according to a pass schedule suitable for each product. Each month is passed through a group of rolls with different combinations for each product. In other words, in the above case, for example, many of the rolls on the downstream roll stand can be used for each product, but on the downstream roll stand, the pass schedule gradually diverges, and the molding hole type is changed according to the exterior product. There are circumstances in which it is necessary to selectively use various types of rolls with (Kariba) for each product.

For this reason, conventionally, when changing from product to J chair,
In many of the F style 11111 stands, the creators are Iwa V, l.
However, these roll exchange operations were extremely complicated, and the process of exchanging the rolls caused a lot of loss and damage. there were.

OBJECTS OF THE INVENTION The present invention aims to enable quick and easy changes in pass schedules in conjunction with changes in product size.

(Structure of the Invention) Therefore, in the present invention, it is possible to
A roll stand that performs second rolling is selected, and during two or three successive passes including this roll stand, the rolls are axially moved so that the forming holes corresponding to the product size match the pass lines. The first-class roll stand is characterized by rolling by a flat section.

(Effects of the Invention) Therefore, according to the present invention, there is no need for complicated work such as replacing the roll itself when changing the pass schedule, making it extremely easy to change the schedule, and reducing loss time when changing the schedule. will also decrease significantly. As a result, work efficiency is greatly improved.

(Example) Next, an example of the present invention will be explained based on the drawings.

FIG. 1 is a diagram schematically showing the long steel rolling equipment according to the present invention, and the rolling installation 1iii consists of 12 roll stands 81 to S1 arranged along the pass line.
2 (each stand is indicated by 2 numbers only for convenience).

Each roll stand has a pair of rolls R]・river<
Ili 12! i, and an odd number of units [-1 stand S
l, S3. ...then roll l:< i, , 'R'A
... is horizontal, and an even number of stands [1 stand g2. S=+
... is roll I < 2, R = 1 ... is roll 1
Supported by α.

This rolling equipment is a product (long steel) Wl-WIO with a billet number of 2 blades and a noise of 13 (not shown) to 101".
(not shown) Rikiyama Nobuka': came to be done 'C'.

Next, to explain the roll shape of each roll stand 81.~S]2, the L flow side stand S1.-8! The roll RI = R5 supported by 'C'1 forms a completely flat roll (hereinafter the flat part of the roll will be denoted by: or 11). Note that instead of rolls R1 to R4, rolls 1<1゛ to R4' have holes 25 and 28 having rhombic cross sections.
It can also be removed by one month of menopause.

Also, stand 56 = 81 (roll supported by i) (6
・River 10 is in the flat part 30-34 ponds, respectively.
Molding hole molds L'l to L3 for pre-finishing (the hole molds for pre-finishing are indicated by ○) and molding hole molds for finishing L'l = F5
(The hole shape for finishing is indicated by .).

For example, roll R6 has a flat part 30 and a pre-finish hole type I.
, 1, σ-ru I'<7 has a flat portion 31, a finishing hole type F1, and a pre-finishing hole 9IJ.

The following rolls R1j~l? The same applies to 1fl.

Rolls R, lJ, 1 supported by stands Sll and Si2 on the most downstream side, and 12 are caliber rolls without a flat part, and rolls [<11 have two types of pre-finish hole types L4.15, and For roll 1 < 12, please use 5 types (1: ``Hole type F6 ~ F I l)''.

To show these rolls more specifically, for example, rolls R6 and R7 are shown in FIG. 3(a) and FIG. 3(1), respectively.
). and roll 1<6~1
The shaft 12 can be shifted in the axial direction by a roll stand shift device.

In other words, in Fig. 5, the roll stand S (corresponding to the stand S'7. equivalent)
(r L, each roll is connected to the binion stand...12 via the spindle 4+1.41.-
1-The roll stand S, the binion stand/[2 and the spin torque port 43, etc. are connected to each other via the moving axis l[・4,
Worm gear driven by a motor (not shown) A, 1
Sole play by 5) 46 J: is in order so that it can be shifted in the axial direction of roll 1<. Also, Mot.
In the evening 4'7, the closing type device 71 i (, Binion stand = 12 and spindle, 1 ()) The cap was fr and the roll 1
To reduce the rotational force, the above-mentioned R-type device 1); is used to shift the roll stand S, etc.
It becomes. In this rolling installation MH, the roll R is shifted along with the roll stand S in the direction of its axis IJ to perform a limit (not shown).

16. Position the roll stand S at the appropriate position (multiple positions are determined for each IJ-Role) as determined by a switch, etc., and then use an appropriate clamping device d (not shown) to secure the roll stand
After fixing, rolling is performed. Further, the roll stand S61Sr3...SJ2 is also constructed so as to be able to shift in the axial direction of the roll R6,1<8...1712 as described above (Japanese Patent Application No. 5F; 22
96, No. 40).

- A force is applied between adjacent rolls l (1 < 1 to R12), as shown in FIG. Regulate movement
A temple guide device is interposed. This guide device is reversed at both ends by a hydraulic motor 50 according to the product M size]
By rotating the threaded rod 51 having a J position, the guide plates 5 of 1λ-j facing each other across the path line ]'L are rotated.
2153, the guys 18' rollers 5. The distance between..., 55...! i! 1ll (forced side opening degree) can be changed (see Utility Model Application No. 5+118°7 '793).

When rolling a long steel bar, for example, as shown in FIG.
A pass schedule is determined based on initial data such as roll shift position, roll opening (Ir lower gap of roll), and guide opening corresponding to each product.

Next, the mill jump amount is calculated based on the above pass schedule, and the roll opening degree of each stand is adjusted according to the result using a conventionally known method. At the same time, each roll is shifted along with the roll stand as necessary in its axial direction [ζ, axial shift is simply referred to as shift].
Adjust the guide opening.

An example of the pass schedule is shown based on FIGS. 1 and 2. As shown in FIG. 2, for example, the product W1 is rolled and coated with a relatively small billet) Flat roll [(3~F<5 and 14 rolls each)
Roll 1' (6, R7
Only is used.

After the billet [3 is sequentially stretched by flat rolls R3 to [(5), it is subjected to pre-finishing holes of rolls R& and R7, and subjected to pre-finishing and finishing processing by means of finishing holes Fl. The roll [<7 taken as product W1)) is discharged. Furanotrol R3,
Instead of R4, it is also possible to stretch the rolling roll using Calibarol R3', R, ↓'.

Subsequently, when manufacturing products ~.-'3, in addition to the above configuration, the finishing hole type F3 of the first roll is newly aligned with the pass line I'L. Alsoa-ru)(6,1(
7 and shift the flat part 30 of roll R6 and roll R.
7, the pre-finishing hole type L2 is made to match the pass line pI7, and the opening degree and forced side opening degree of each roll are further changed. In this state, the billet 13 described above is rolled into roll I<:(
- Stretch sequentially at R6, and roll 1 is good at 7.
j JJII Il,', and can also be taken out as a product W3 on the exit side of roll 1 (rolled after finishing in step 8) 3. In addition, products W2 and W4 (
, manufactured by the method of Class 11゛j.

-)i, When manufacturing product ■'5.~W1()] In this case, a relatively large billet is used as the raw material.

For example, when manufacturing product W5, flat roll 1
(1 to 1 Te5, respectively, the flat parts 30 to 32 or the rolls aligned with the pass line PL [6 to Type F
5 is matched with the pass line r' L, roll R9,
Using R1, 1, 1, further adjust the opening degree of each roll and the guide opening degree as necessary. In this state, the second billet was stretched sequentially with rolls 1 (1 to R8, and then finished and finished with rolls R9 and R11) until the roll l<io. It can be collected as product W5 on the output side.

Also, as is clear from Fig. 2, product XA' 6 = product,
When manufacturing W1 (), all the rolls are used, and the roll 1 te 1 < 1 () is a month for each product, and the common 1. It can be fixed at f position and used for one history. Therefore, by simply shifting the handles 1x11 and 12, the product W of the desired size can be obtained.
6 to W1() can be selectively set to serial number, - or 1. That is, if the above embodiment is summarized as a stock, roll 1<
1 to R5 are used at a common position for all products W14'] +1, and 6-R is used at the roll l of that pond.2 is shifted as appropriate by signals from the control computer, etc. according to the product size. By carefully changing the pass schedule by allowing some of the rolls to stop, or stopping some of the rolls, it is possible to selectively manufacture a product of a desired size from a billet of an appropriate size.

In the present invention, when changing the path schedule, 10
This method has the advantage that there is no need for any complicated work such as "V" and that schedule changes can be made quickly and easily. Further, according to the present invention, as described above, when the schedule is changed, the opening degree of each roll and the guide opening degree can be automatically adjusted by signals from a control computer or the like. The control computer has information on the order in which each product is manufactured, and the V! By inputting the number of pieces to be manufactured, etc., it is possible to automatically manufacture a wide variety of products in succession. Of course,
The double roll shift operation or the adjustment of the roll opening degree and guide opening degree can be done by the operator's command (button operation, etc.) at each lot break, and not by signals from a computer or the like. Ru.

Note that the number of roll stands, the number of billet or product sizes used as rolling months, etc. are not limited to the above embodiments. In addition, the cross-sectional shape of the hole carved in the hole can be any shape such as circular or square depending on each product. The steps 1.) and .C to gradually reduce the cross-sectional area shall be made as appropriate.

Moreover, in the present invention, ′ζ, roll f<6=R] 2
When shifting etc., roll stand S6...: Bow 1
2 itself is in a fixed state, and roll 1 (3 to 1 x 12,
7- may be shifted.

[Brief explanation of drawings]

FIG. 1 is a drawing schematically showing each roll of the long bar rolling IIF 11II according to the present invention, and FIG. 2 shows the axis position of the T roll corresponding to each product manufactured by the rolling installation 111. Based on the path line 7 (the drawing shown in -,
Figure 71 is a front view of rolls 1<6 and 7, respectively;
A drawing showing the procedure of f, Fig. 5 is a roll stand system;? )
A broken cross-sectional view of the device, and FIG. 6 is a schematic W-plane view of the guide device. To Sl・S12...Roll stand, R1~1<12
...Roll, 30-34...Flat part, Ll--I, 5, F]-F1()... Molding hole mold. Patent applicant: Kobe Steel, Ltd. Representative: Patent attorney: Aoyama, two idiots Figure 1

Claims (1)

[Claims] (1) An electrically controlled rolling method in which multi-die long steel products are manufactured in a continuous pass C'' using multiple roll stands arranged along a pass line, and the roll stand performs finish rolling according to the product size. is selected, and in a roll stand with 2 to 3 baths including this roll stand and 1 + fv, the roll is shifted in the axial direction so that the molding hole pattern corresponding to the product size matches the pass line, and then An electrically controlled rolling method characterized in that rolling is carried out so that it is rolled by a flat section in a first-class roll stand.