SU405609A1 - ROLLING METHOD 19 - Google Patents

Description

There is a method of rolling a billet in the drive horizontal rolls with parallel in the plane of the metal output from the rolls forming, inclined to the axis of the roll at an angle of 45 °.

1-1 known method provides one-sided compression of the workpiece in each pass.

The proposed method differs from the well-known fact that rolling is carried out in rolls by at least two sections of the drum along a pernmeter, having a taper of different signs and eccentric with respect to the axis of the roll, with synchronized rotation of the rolls and a forced feed of the strip.

This achieves alternate two-side compression of the workpiece in one pass.

Pa figs. 1 shows the arrangement of the rollers and the workpiece; in fig. 2 - the same, with the position of the rolls in the opposite phase.

The rolls I, 2 have sections 3-6 of drums with conical surfaces, which, in the working position (in the plane of metal exit from the rolls), are mutually parallel for different rolls, and for the same roll in its different phase positions - mutually perpendicular.

The workpiece 7 is crimped between the tapered sections of the work rolls I, 2 alternately on both sides. When the mill is in position,

shown in FIG. 1, the tapered sections 4, 5 of the rolls compress the workpiece, and then, since they are located on the axis eccentrically, they diverge and they do not contact with the workpiece. After rotation by 180 °, sections 4, 5 on rollers 1, 2 are removed (E) from the billet to extreme positions, and conical sections 3, 6 are in contact with the billet, which deform the billet. But since, in the working position (in contact with the workpiece), the forming sections 3, 4 and 5, 6 are mutually perpendicular, then sections 3, 6 compress other edges of the workpiece.

At the next revolution, the workpiece is crimped again, and the reduction depends on the iodach value of the workpiece 7 per revolution of the work rolls. For each revolution, compression is performed alternately on all four edges in two mutually perpendicular directions. For each revolution, a thin layer is deformed, but the total compression per pass can be quite large.

As well as on known planetary mills, there must be installed a stand forcibly feeding the strip. The amount of movement of the strip per roll rotation determines the reduction per roll rotation.

The smaller the feed, the more accurate the size of the strip in thickness and width. The nature of the deforma- tion will be the same as on the well-known universal tambour mills, but without the use of vertical rolls.

There may be different conic sections not two, but a larger number around the perimeter of the roll, for example 4, 8, etc. At the same time, not two but more reductions will be performed per revolution. Rolls can make swinging movement.

The optimal variant is when the conic sections with the taper of different signs are made with different eccentricities, which makes it possible to give the billet in both directions different rolling shifts, such as a square from a rectangle or vice versa.

Subject invention

The method of rolling preimuschnogo bended billet, in drive horizontal rolls with parallel, in the plane of the metal exit from the rolls, forming them, inclined to the roll axis, preferably at an angle of 45 °, characterized in that in order to alternate two-side cutting of the workpiece in one pass , rolling is carried out in the rolls by at least two sections of the barrel around the perimeter, having a taper of different signs and eccentric with respect to the axis of the roll, with synchronization of the rotation of the rolls and the forced feed of the strip.

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