SU745567A1 - Method of separating conjugated sections - Google Patents

Description

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The invention relates to rolling production. It can be used on sectional, rolling mills in the production of symmetric and asymmetrical section varieties in a combined form.

There is a known method for separating the aligned profiles by shifting the profile portions relative to each other ij.

The disadvantage of this method is that the surface in the separation zone is uneven, and the edges of the separated profiles are sharp with burrs.

The purpose of the invention is to obtain a high-quality surface in the plane of separation and lower costs when processing separate profiles.

For this, the shift and separation of the parts of the combined profile are carried out in a four-roll caliber with simultaneous deformation of the separation planes between the end surfaces of the horizontal rolls in the separation zone and the vertical rolls.

FIG. Figure 1 shows schematically a four-square caliber, in which the division of the combined profile is performed with simultaneous deformation of the separation planes; in fig. 2 — separation and deformation stages of separation planes; in fig. 3 - the same in terms of.

The process of moving and separating parts of the combined profile with simultaneous deformation of the separation planes is realized as follows.

The combined profile is set into four caliber caliber, in which the driving horizontal rollers 1 shift the left part 2 and the right part 15 relative to each other until the combined profile is completely divided into its component parts (see Fig. 1). The division of the combined profile occurs along the planes A, while to reduce

20 cutting forces and obtaining the required technological radii on the divided parts in the process of rolling the combined profile in the plane of the future separation

It is preferable to prepare a weakened cross-section with a blunt aacr; Tleni mi one of the known methods. The length of the strip with horizontal rolls (see Figs. 2 and 3) consists of the cutting section 1-II, the intermediate section G-111 and the section for cutting the strip with vertical rollers W-1U. The specified contact length significantly exceeds the contact length of the metal with the vertical rollers 4 (Fig. 2 and 3, section. W-1U) ,. . The horizontal diameters of horizontal rolls are usually 1.3–2 times the diameter of vertical rolls, and the magnitude of the shift of the parts of the combined profile is much greater than the reduction of I along the separation plane. Therefore, the combined profile is initially divided by horizontal rollers (see Figs. 2 and 3, section 1-II), and after moving the separated parts through the intermediate section 11-Ш, the latter interact with the vertical rollers (section W-1U). As a result, the deformation of the section planes occurs between the end surfaces of the horizontal rolls in the separation zone and the vertical rolls. Required krli. The processing of the separation planes is achieved by assigning a radial amount of cutting of the planes A, for which the width of the divided parts of the profile C must be greater than the distance between the end surfaces B of the horizontal rolls in the separation zone and the vertical rolls by the amount of reduction (1.5 - 4.0 mm ). . The described method of separating the joint profiles with simultaneous deformation of the separation planes can be carried out both in the cold and in the hot condition in four sets, the roll gauge with coaxial arrangement of the axes of the horizontal and vertical rolls or in the gauge with spaced spikes relative to the other horizontal axes. and vertical rolls. In this case, four-roll gauge with a coaxial arrangement of horizontal and vertical rolls is preferable to use

When otoshSHII diameters of the latter, equal to 1.5 - 2.0 or more,. and calibers with spaced axes - with a ratio of 1.5 - 1.3 and less.

As a specific example of the implementation of the proposed method, the separation technology was selected in a four roll caliber in a cold state.

 22.6 mm from the axis of the rolls, where D / 7r § -

2

- the magnitude of the shift of one part of the profile after complete separation. After a complete shift in the area of 22.6 - 14.2 s8.4 mm, the separated parts freely move vertically relative to each other and only on section f of the profile for guide elevators, rolled in a combined form, for example, at the mill 55O. The dual elevator profile after rolling on the mill and cooling on the refrigerator has the following main cross section dimensions: Total width 2 x 64 - 128 mm Flange height 90 mm Wall thickness 10 mm Head thickness 20 mm For separating dual profiles with subsequent editing, a universal stand with four-roll caliber is installed on the outlet roller table of the refrigerator directly in front of the sorting machine. Dimensions of work rolls of the universal stand: rolling diameters of horizontal rolls 440 + 380 - 410 mm; barrel length 119 mm; roll diameters of vertical rolls 2OO mm, barrel length 16O mm. The axes of the horizontal and vertical rolls, forming a four-square caliber, are located in the same plane. The dual profile, cooled to a temperature of 100-250 ° C, goes to the universal stand, in which it is divided by shifting the parts of the profile relative to each other and compressing the planes along which the shift is performed. The magnitude of the shift parts of the profile of 10 mm. The length of the contact of the horizontal rolls with the metal is Cdr / 0.5 Other- 4/7/0.5.470.7.539, 2 mm, - 20-10 + 5 where 4 / - -.5 is the shift amount of one part of the profile by the horizontal rollers. The length of the contact of the vertical rolls with the divided parts of the double profile is -1U, 5 .200. 2 14.2 mm. The complete separation of the double profile by horizontal rollers will occur on a section of length a - | /0.5.410. 5 11.2 mm from the axis of the rolls, a two-sided interaction occurs on the horizontal metal and vertical rolls, due to which the separation plane is deformed. Therefore, with. This ratio of diameters of horizontal and vertical rolls, accepted values, reduction of metal and overlapping of horizontal rolls during the shearing process ensures that the full shear processes of the double profile parts and the deformation of the separation planes are separated in time, which eliminates the likelihood that the double profile parts are pressed against each other in the transverse direction and the distortion obtained when rolling on the mill profile configuration. With other values of the above parameters of the separation process in time, the process of complete shift of the parts of the combined; profile and deformation of the separation planes can be achieved, for example, by separating the planes from each other in

which lie the axis of the horizontal and vertical rolls.

The amount of compression of individual parts of the double profile between the end surfaces of the horizontal rolls and the vertical rolls is, in this case, 128 - B - 128 - 60 - 4 mm, 2 T

It is in the range of 0.5 to 4.0 mm, depending on the desired quality of processing of the separation planes, and can be easily adjusted by appropriate adjustment of the vertical rolls.

Claims (1)

1. Korolev A. A. Mechanical equipment of rolling shops of ferrous and non-ferrous metallurgy. M.- Metallurgists 1976, p. 252 - 255 ..: