SU674806A1 - Metal-rolling method - Google Patents

Description

one

The invention relates to the treatment of metal by pressure and can be used () at iT) to produce pipes by the method of periodic flow.

The method of periodic rolling of pipes, including the deformation of the workpiece iia to the mandrel between the rolls with the strands of the (constant) profile, into which the rolls (or the workpiece) perform a reciprocating motion with periodic feeding and turning of the workpiece Ij.

The accuracy of the pipes that are rolled in this way depends on many factors, one of which is the magnitude of the junction point. It is calculated on the basis of the maximum possible supply of phi provided that the required precision of the finished pipes is obtained. In addition to the magnitude of iodachi, the magnitude of the broadening junction is correlated with the metal rotor and this leads to a decrease in the accuracy of the geometric dimensions of the pipes. In this way, the increase in feed, t. C. the increase in the productivity of the mills in the rolling method og1) is moderated by the accuracy of the geometrical p; tt-.b. In addition, when considering the capacity of the CPR, 1P1e1C1; rolling due to weights and punctures, it is deficient1) miranus) | -o .1.1a h: .ir; .i,; then also) Dg ;; to a reduction; Yu exactly the geometrical dimensions of the pipe by increasing; 1; deflouauiii vlkov and etanin cage. As i: iBcc :(), it is possible to improve the accuracy of geometry; x ph: measures of pipes can be reduced by reducing the value of polochka. but at. This greatly reduces the productivity of the mill.

It is known that if the rolling of a strip is driven on rollers with idiokavyi circumferential speed lp, then the friction from the forces that increase the resistance to deformation turns into a force that contributes to deflection | therefore, rolling with different circumferential speeds requires less effort from pressing the rolls on the metal, which leads to an increased 2J performance.

This kind of metal rolling, which deforms the workpiece with rolls, rotating with irregular peripheral speeds and doesn’t come as a prototype.

However, the ciioccx rolling roll, ooecia-Miiivayuschiy tensile stress and strain 14, the line d: irokatkno | 1o, 1os in the rolls and does not allow to reduce the size of razvka / gki in the stream IMJX rolls periodic irokatk. pipes and because of the increased eko.i zhepi de {|) of the edited meta, 1, but the tool prizod.it to an increased eio ii3H, i.e., its accuracy irokatymiymi Ipyf), especially when rolling with riOBbiineHiioit ve;

The aim of the invention is to determine the exact geometrical: dimensions, | kiln with a periodic irgzhatko with a higher level of .m4iiH (jfl feed.

L, 1 of this in s:; OBSERVE; p () rollers of meta.ch., containing de (|) ormaii1o billet pair va, 1kov, vrapiiion1ihs with ICh) okinki okru K1P 1mi skorskt m, ok;) Znu1O speed oppom} from va.lkov eoooiHaioT ia i Meiibiiie around the speed).

The difference between the circumferential velocities; 1 cc is optically optimized, since the cusp of the circumference: c) of one of the rolls is less;: pa1 -; 1b1b Ib- / n pp1-: 1i) leads to the increase of the force of the tool.

The essence of the unspoken connection is that the unsealed tubular billets de (} k) are identified with creek-shaped streamers (|) silt, which are reported by unequal peripheral speed in |) adeep with dissolution of circumferential ck (J) (Jctey upper and the lower rolls in inx TCVia 2 15 / o, i.e. the circumferential speed of the trial ship from ia.ikov is reported on 2-lo- / n meiiee circle speed of the other.

In the case of a cold DUS) -200 for cold periodic iipokatka of pipes from OH 18X10T steel according to Mapniptam 30X2, X, 1о mm p 30 X 2, b - 21 XX 0.75 ni; 1ach Zmm, (i mm and 9mm, correspondingly, n |) and; - / gom ok |; 1} zhpa speed per 1penii 1-; izh11eg () va; 1ka nrnnima.tae 0.44 .m; s, and the top 0.418m / s, t i.e. difference

lasovanie their sos g ;; |, l, | ;; ;). : fH-iH exerienized I) aceor, iacoii speeds /) 1t :: galos, by the fact that); they are different, and the rate of their rotation (; d 1 Nakova

Understanding acjBaHHt- (;; long-term re; re; -: less than 1b), it is also possible to achieve one;:; x and ov. Diameters of w. Lko1-, ec.ui their grids, networks will be Gaz.tic.

11p (} wedon1p1 | 1e uxner1-1meatl1 nocaza / n ;, cht) t (j4i-iocTj pipes, 1 semi-demons: xrn pryzhatke e ukazanimi raseo1laoeo1ooang.em speedosto na, i kov, significantly, especially iinii C) i , .ii, 1NIH is compressed x, since the ion rolling in the deformation zone of the ir () bladac) stretches the voltage that irinodi to MeiiDiiieifino whip-1g metal. This will make it possible to significantly reduce the number of different things: 1k, h g;: K) star, drinking irm to the sick. ve.igchiiah nschchachi oo, to make pipes of higher strength.

 1 The disassembly of monojust and the pressure of the norkatka is also epi ayuts, in ev: h-: u umepiie de (p {)) matzp valkon and stan ;:::;,: to, 1. which also leads to t (h oto prokat: naem; x.

.MLi.ia isoste lewtfi

(dyusob iroka; ki: ega, G; a, spdsrzhashik deformatstsk) blanks of people ija, iK; jii. vr ;; shayushikhe with unequal () K) uhn:, 1 mi speed, find out what, with t.to noBbiHieiHim exactly (()) metricheek. The pipe size in a periodical oscillation is: I -, - L s; i is the above-mentioned value of nodachi, srzhrzhnuyu speed of one of the va, 1 konto1ak) t iia 2 15; i-; i min.p.-circumference speed (.1O.

1-1tetoch1-1ki ch | for.mapii, nr t) 1e denomination. Examination at examination

1.Koff 3.A. et al. Cold pipes and rolls, Metal1ur14zdat, 1962, p. 6--9.

2. Authors' evedetely.lstvo (. R. 63448, cl. 21 B 1/06. 1940.