SU1532121A1 - Method of manufacturing sections of high rigidity and stand for effecting same - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in the production of profiles of high rigidity. The purpose of the invention is to improve the quality of the profiles by stabilizing the length of the periods and reducing the metal consumption. The strip is passed from top to bottom between the upper and middle rolls, bending the rolls and crimping the edge sections of the strip when the middle portion is released from the clamp. The molding is carried out between the middle and lower rolls. The amount of reduction is taken within 0.5 ... 2%, the molding is carried out in a cage with three rollers having the same basic diameters. The upper roller is made with a smooth barrel, having different diameters of the middle and edge sections. The diameter of the middle section is 0.98 of the diameter of the extreme sections, and its length is 6.6 ... 8% longer than the length of the section with the gauges of the middle roll. This technical solution allows to reduce the variation in the lengths of the profiles. 2 sec. f-ly, 2 ill.

Description

The invention relates to the processing of metals by pressure and my, d: t was used in the production of profiles of high rigidity (PVLO.

The aim of the invention: 1 1 vpeps improving the quality of high-stiffness prof. 1 by stabilizing the length of the periods and reducing the races:

Figure 1 shows a section; the rolls of the stand along the longitudinal axis of the mill; Fig. 2 shows the configuration of its roll rolls.

The cage contains the upper roll 1 with a smooth barrel and two brook rolls - average 2 and 111 3. The main diameters of all rolls) (.. С1) one part of the barrel of the upper roll has a length of 1 s

diameter P is not more than 0.98 D ,, and the value 1 is greater than the calibrated part 1 of the barrel of the middle roll by 25, which is 6.6-8% 1, the calibrated part of the barrel of the lower roll is less than 1 and this difference is determined by the strip thickness S. Calibers 4 are located symmetrically about the YY axis. The strip is designated by a position 5, a live rolls a position 6.

The gap between the rolls 2 and 3 is equal to S, and between the rolls 1 and 2 - d, and L: S.

When forming, strip 5 (the direction of its movement is indicated by an arrow) at first 8-image 1 o covers rolls 1 and

2 (total angle - 360 °) with compression of its edge sections I and II and release of the formable section from clamping, and then passes into the gap between rollers 2 and 3, where the extrusion of closed corrugations is carried out. The amount of reduction is taken within 0, 5-2% of the Formed strip along the take-up roll table 6 goes to the correct machine, and after it is cut into measuring profiles.

Examples of specific implementation method.

1.PVZH 1000x40 5 mm is formed in a trio cage with D, 300 mm Width of the calibrated part of the barrel of the middle roll mm Parameters of the upper roll: U 0.96 D 480 mm; one,

-1.08 1, (151 mmo

The gap between the middle and lower rolls mm; the amount of compression of the edge sections of the strip by the upper and middle rolls —Ah 0.02; , 02-5 Oh, 1 mm.

2.PVZH 1000l2khZOOOK35hZ (mm) D (-550 mm; mm;, 975 D. 535 mm;, 065 mm;

-0, ОБ8 0, OU3 0.03 mm.

3.PVZH 1500O 1200h35k2 (mm DO 550 mm; mm;, 98 1) o

 540 mm; lt, l, 05 1c 462 mm; d h 0,005-8 0,005x2 0,01 mm.

Claims (2)

1. Method for the production of high stiffness profiles in the cage of the trio, including stretching the strip by 8-way passing it between a pair of rolls and forming between the rolls of the adjacent pair, characterized in that, in order to improve the quality of the profiles with longitudinal corrugations and reduce the metal consumption due to the stabilization of the period length, the tension create by passing the strip between the upper and middle valkamn with simultaneous compression of the edge sections of the strip within 0.5-2.0% and freeing the middle section of Lod the corrugations from clamping, and forming the corrugations between the middle and lower rolls with , 2. A cage for the production of high-stiffness profiles containing three rolls placed one above the other, one of which is made with a smooth working surface and the other two with gauges, in order to improve the quality of profiles with longitudinal corrugations and reduce metal consumption due to stabilization of the length of the period of the corrugations, all the rolls are made with the same main diameters, with a smooth working surface made the upper roll, having different diameters of the middle and edge sections, the diameter with ednego portion is not more than 0.98 diameter edge portions, and the length of this portion on 6,6-8,0% more area with calibres average length of the roll. Compiled by L.Samokhvalova. Editor A.Dolinich Tehred L.Serdyukova. Corrector A.Obruchar Order 7987/13 Circulation 693 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab., A / 5 Have F1 / 9.g Subscription