RU99114265A - METHOD FOR MANUFACTURING RING PRODUCTS - Google Patents

Claims (4)

1. A method of manufacturing ring products on a single-strand ring rolling mill with parallel axes of deforming rolls, in which a common heating and rolling of the original cylindrical billets in cone-shaped deforming rolls with the opposite arrangement of the bases and different tapers, one of which is a drive, having a taper defined by the dependence

where d ₃ and D ₃ - the smallest and largest diameters of the conical surface of the rolled billet after turning the section in contact with the drive roll, mm;
d _B and D _B - the smallest and largest diameters of the conical surface of the drive roll in contact with the rolled product, mm,
made integral, and the other, pressed, in the form of an axis with disks placed on it with the possibility of independent rotation, assembled into a package fixed from axial movement, using two centering rollers placed symmetrically relative to the vertical plane passing through the axis of rotation of the deformation rolls, moreover, the rolling process is carried out in two stages, in the first of which, due to the initial compression section, uneven in height, the section is rotated by a given angle, and in the second stage, due to further compression section, uniform in height, simultaneously simultaneously increase the diameter of the workpiece over the entire section height to specified values, and both rolling stages are performed continuously, one after the other, characterized in that the axis of rotation of the centering rollers are inclined with respect to the vertical plane passing through the axis rotation of the deforming rolls, and to another vertical plane perpendicular to the first, and the point of intersection is always in the vertical plane, passing th through the rotation axis of the deformation of the rolls.  2. The method according to claim 1, characterized in that the axis of rotation of the centering rollers with a vertical plane passing through the axis of rotation of the deforming rolls at the initial stage of rolling intersect at a point located between the axes of the drive and pressure rolls, at the end of the first stage of rolling - at a point located on the axis of the drive roll, and coinciding with the vertex point of the cone formed by the conical surface of the drive roll, and at the end of the second stage, at a point located outside the interval limited by the axes of the drive and pressure rolls.  3. The method according to claims 1 and 2, characterized in that the end planes of the centering rollers are the base planes of two identical truncated cones, the vertices of which at the end of the first rolling stage coincide with the vertex of the cone formed by the conical surface of the drive roll, and the bases coincide with the lower end planes of centering rollers. 4. The method according to claims 1 to 3, characterized in that the centering rollers are made barrel-shaped, with a radius R of the line in the axial section forming the surface of the barrel and the diameter of the lower base d _p , determined by the expressions
R ≈ D _in , d _p ≈ 0.25D _in