JPS5945006A - Control method of plane shape - Google Patents

Abstract

PURPOSE:To improve a plane shape in a control method for changing a roll gap during rolling by changing the roll gap specifically thereby preventing the folding defect in the finish rolling after said rolling. CONSTITUTION:A roll gap is first preset in the position 6 near the thickness 7 in a flat part to be a target in the stage of rolling the material having the thickness 4 with a horizontal rolling mill of a plate rolling installation. The roll gap is quickly widened by the biting of the material to the position of a target crest height 5. Thereafter the roll gap is narrowed at a prescribed speed down to the roll gap at which the intended thickness in the flat part is obtd. and the crest shape in the front end part is formed. The control reverse from the control in the stage of biting is performed in the stage of releasing the material from the biting and the crest shape of the rear end is formed. Then the material having the sectional shape in the rolling direction as shown in the figure is obtd.

Description

[Detailed Description of the Invention] (2I) Explanation of Technical 5F Field Kinoe IJJ is involved in the rolling installation and 1liif of the steel plate,
Horizontal pressure treatment and reduction provided in this IJ extension area ↓'9
11.1, the shape ailJ f+! improves the shape, especially the planar shape, of the R-arc finished material 1 by changing the thickness of the material. 11 methods.

(1)) Previously, four horizontal pressure machines were installed on J branch I, 1 + 1 I2, and 1 vertical pressure [pressure 64y, pressure 4
:Modanai):)-Setup of plate pressure treatment VIII Vc oi"C
F, plane J (〉 shape), if no control is performed, the rolled finished material V11 shape, the edges will not be rectangular, and there will be a large loss in the subsequent pruning process, which will reduce the yield. low 1131
The planar shape is as shown in the figure.

Therefore, in the conventional thickness rolling process, the roll gap is changed during rolling as a method for controlling the qi surface shape, and a chevron is formed at a part of the front and back in the rolling direction. All methods are used to improve the planar shape of the finished material after finish rolling by imparting a cross-sectional shape to the material at the later pressing stage.

However, in this conventional method, the target flat part plate) 4
It is necessary to preset the roll gap to a large calm. For this reason, a low jf4J 7[only, -:i
:<, and the load relay operation becomes unstable. For this reason, I took the IH train in the evening when the roll gear was tightened. The load relay does not operate at the same time as the biting timing. ;ir 3 l', , In the current situation where we are working on a plate 170 phase (l') as shown in the symbol 1 of l,
Originally, it is desirable to set it to the same as the preset t1 of the roll gap, but in this case, the loading claw is not detected and the roll gap tightening timing 'ID controller' Y cannot be created. Therefore, in the conventional method, a value of 2 is precented to the roll gap. However, even in this case, the load is applied differently, so the code
However, there was a drawback in that a flat portion with an unpredictable length such as No. 3 was generated.

In addition, when finish rolling a one-sided shape as shown in Figure 2: 9, the outside of the angular part of the 4fA section is rolled up to the outside, and the crop die 1 is cut, and the planar shape is When disturbed V)
There are some shortcomings/ζ.

(c) Object of the Invention The present invention is intended to solve the above-mentioned drawbacks, and it is easier to preset the YC than the VC when the roll gear is close to the flat thickness of the roll gear.
Perform all 4i heavy detections, then core 1'h'1. VC number 4, Yamagata part 6/:) Expand the roll gap slightly.
Mi, value nine down, sono t soft, constant no □ mi? , n'-tal
12, 111fij <noj
, iI '63 Shiko na 4) and roll gap full sudden α (Ladder expansion next job 1 laziness (7 sentence r kosume/) also known as ``V'' and subsequent finishing EE 1)''E VC okei) The purpose is to provide a planar shape control method that can improve the planar shape.
〇(d) Qualifications of the Invention Below, the fruitful side of the present invention is shown in drawing 'a: 'j31i4(
I will clarify the situation. Figure λ5 shows the planar shape when the present invention is implemented. It is I. When rolling a material having a thickness of 4 in a horizontal melon roll of the Nowa plate rolling equipment, first the roll gap is preset from the target plate thickness of the flat part to 7 to the position of 6. The material is bitten (rapidly widen the roll gap to position 5, which is the target chevron height. After that, narrow the roll gap by a predetermined J degree until the target thickness of the flat part is obtained.゛ [Form with a chevron at the tip.The material's grip (・When you don't use vrct.
By performing step 11 to form a chevron at the rear end, it is possible to roll a material having a cross-sectional shape in the L direction as shown in FIG. 5.

(e) The effect of the original J.
Yo, Forest Products V's 1-Toyu 1. becomes thicker (:1
1. The force is increased by 5, and there is no time lag between the biting and the load relay. ::i:-ri, the roll gap can be started at the timing of the biting.

This means that 11ζ up rolling direction same moe ti+i I'c I-
＞The child appeared (the symmetrical shape side fill 'i
It can be carried out.

It is the same as the 1st weight and the same lI \ shi ' This roll gigang is widened and the Q Yonashi 1 α 11S is 1 1 '-e, f is placed at the top of the mountain. I was able to move it!'), and the subsequent action was ``two-pressure contact i2:l'?'' Even if lρ is used, it is possible to prevent arrogance.

FIG. 6 &U is a diagram showing the flat "1" ■ shape of the material obtained when the present invention is fully implemented and 1-f and finish rolling is performed.

Soil 7c47 is a material with the planar shape shown in Figure 6.
- Shows the cross-sectional shape seen from the tori arrow A-A'...11ri
It is a diagram.

(f) Yoshiko Mizuka, which has become more ancient and clearer than the effects of the invention 1. ; N' plane shape i1 of J
i'J 7t according to the way I rollgagged
J;+::jflatjj,jiζb41txthickness+jヱcomb/koi1'b ξJ・'), 1
．． Lt-, i・;- becomes larger (;5te+(J i Moeri l becomes gray hair properly, so the bite timing of material Shin 1 can be made positive 0'#i l-koj wing height. The effect is low.

According to the present invention, 1) has a phase family of 11J cubic shape rolled,
i (j roll same V bit, 11. then roll N゛guyang dog, then C widen 10 taper 1- [8. Mr., that i; 30-ru = A-' Yasopu The doctor said that the tip should be rolled with a sudden t' (narrowed reverse shape σ) so that both ends of the tip were served by the double chevron 11 and 11. Both sides of the part [・Have a small chevron shape, and the chevron part''; with the part in the center, 1・r
- Since the IJ is pressed, it is possible to prevent the 5゛l delivery part from rolling by applying two pressures and pressure. Therefore, it is possible to improve the shape of 1,000 degrees Celsius, and the yield of VI material can also be improved 2).

[Brief explanation of the drawing]

tF, according to Figure 1μ)・This planar shape system tact all rows 2
I゛〆l, >>2 Figure Q showing the flat shape of the j♀ plate when c
The planar shape of the east side iit'1piil +C, () moon -4i1 direction 111 [towards) 1 Yubuku iH, 1,) i:
! , Th: Diagram shown, ') J: 3 diagram (・yoshi・) 2 planar shape of soil 1 space r, 1+ v koyoku) river/su 2 direction t (
41 song form G, Lari (Pa, ゛4: Show rLi, shii'y
4 t゛';l &I, [1ij;(]゛(Sushijij)
1 yo, 1 prostitute 1iiJ fjll to show the shape of 711 1゛'1,・21 horoscope 5 figure 1tJ,':;F
, ', Pressure j and direction t when applying once again with +-light!
r ii'ii form 'Hide no: figure shown, white) 61tsu l i'
J: What is shown in Fig. 5 ・pressure 1 il-L bu, -21 go Its +: j, +, space diagram /) 1 , 1 ... pressure 61 layer 135 j1 or j
":' jllj2.6... Roll gap preset (i'13... Flat part 5... Mountain blade ≦i, +"< -hi !1is l
i'j7...Target flat plate J, l-, value 8...) 1 komi NX (7317) [3i human dialect] 1! Shi Nori Chika Togo Yu (and others j6) Figure 1 Tate 2 Figure 3 Figure 4 Figure 8

Claims (1)

[Claims] In a plate rolling facility that manufactures thick metal plates, when a rectangular parallelepiped material is caught between the rolls of the rolling mill, the roll gap of the rolling mill is suddenly widened to carry out Cheever rolling, and the f-thread roll cap is removed. Sharply taper-rolled with an inverse shape of jlξ・O, and the first 4 pieces of ILIK were rolled into a 4-r shape.
The pressure is 1 (ii;, (,, near the rear end of the same village, f is 1)
” Bivalent, when you start, the previous 3. The roll gearing of the first rolling guard is read over the moon, and the roll gap is widened and taper rolled, and then the roll gap is narrowed rapidly, and the roll gap is reversed and the dog taper rolled is rolled until the rear end t''113113 double-sided shape is obtained. 1”-+
How to fit a planar shape.