SU1542679A1 - Roll tool for reeling rings - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to the rolling of rings, and is intended to produce rings of large diameter. The purpose of the invention is to increase tool life. On the axis 1 of the pressure roll of the ring rolling mill, the bandage is assembled from a package of disks 2, 3, 4. An annular billet is mounted on it and the drive and pressure 1 rolls are brought together. The billet metal pushes conical discs 3, the diameter of which is larger than the diameter of the discs 4. Disks 3 are mounted on the axis of the roll 1 with a gap. The lower part of the discs 3 expands the entire package and moves the lower part of the end discs 2, partially compensating for moving their upper part, eliminating the misalignment of the discs 2 and loading the tension bolts 5 and 6 evenly. The invention improves tool life. 2 ill., 1 tab.

Description

figure 1

The invention relates to metallurgical production, in particular to rolling rings, and can be used on ring rolling mills to produce rings of large diameter.

The purpose of the invention is to increase tool life by eliminating disc skew.

FIG. 1 shows a tool for rolling, ring rollers, a general view; in fig. 2 - the same, during the rolling of the ring.

five

The tool for rolling rings includes axis 1 of a non-driven inner roll of a ring rolling mill on which a roll band is mounted, which is made in the form of a package consisting of forming a brook of gauge with end faces 2, compensating skew 3 and internal 4 diaBands from a pack of disks 2, 3 and 4 is assembled on the axis 1 of the inner press roll of the ring rolling mill, the workpiece of the ring 8 is mounted onto the band and the outer drive roll 9 and the inner pressure roll are brought together. In this case, the metal of the ring blank 8 (Fig. 2) pushes tapered compensating disks 3, the diameter of which is larger than the diameter of the disks 4, and in the holes there is a radial clearance about axis 1; the lower part of the disks 3 pushes the entire package of disks and moves the lower part of the end disks 2, partially compensating the movement of their upper part, eliminating the distortion of the disks 2 and loading evenly the clamping bolts 5 and 6. Reducing the movement of the upper part of the disks 2 prevents the ring billet from expanding.

Example. On the rolling machine RM-2000 rolled blanks of rings made of alloy VT-6 with an internal diameter of 350 mm, na15

skov. The disk pack is bolted with 5, 20 MANUAL 500 mm and a ring height of 80 mm. AT

6 and fixed to the swath by means of a nut 7. Disks 3 and 4 are made in section in the form of a trapezoid, with the end disks 2 and internal disks 4 mounted rigidly and without a gap on the axis, and the larger base 25 of the trapezium section of disks 4 is made on their outer diameter i.e., they are made taper inward of the roll. Compensating discs 3 are made with a reverse konugnoy; yo, i.e., a larger base of the trapezoid in their

As the internal roll, the proposed tool with a band of five discs was used; the angle of inclination of the end sides of the discs was 5 °; the axis diameter was 150 mm. The internal diamer of the compensating disks was taken equal to 151.5; 153; 15§; 157.5 and 160.5 mm (i.e. equal to 1.01; 1.02; 1.04; 1.05 and 1.07 axis diameter). The same rings were rolled out using the prototype tool and the tool life of the tool was compared to the hole, a diameter of 30 ment and metal savings due to increased ring accuracy.

The results are shown in the table.

As can be seen from the table, with a hole diameter of compensating discs equal to 1.02-1.05 diameters of their axes, the resistance of the discs is equal to 1.02-1.05 diameters of the roll axis, the outer diameter of the discs 3 is greater than the diameter of the discs 4 by the same value 0 , 02- 0.05 of the diameter of the disk axis, i.e. the height of the trapezoid in the cross section of disks 3 and 4 is the same.

The diameter of the openings of the disks 3 is made 35 kov bandage increases, the diameter of the axis is 1.02-1.05 times larger, since with a value less than 1.02 times the compensation of the skewness of the disks is insignificant and the service life of the band practically does not increase. Limit the upper formula of the invention

Roller tool for rolling rings containing axle mounted

la diameter of the axial hole of 4 ° bandage in the form of a package forming a stream

1 05 the diameter of the axis is connected with the fact that the arrival of the 6HPT of the caliber of conical disks with an increase in this value increases by the alternating direction of the taper, the average displacement of the compensating disks 3 and the face to fix the package of disks on the axis,

discs 2, while increasing the difference in that, in order to increase

load on the fixing bolts 5, 6, which are 45 durability, it is equipped with compensating

leads to their rupture, reduced resistance to conical discs with a cross section of the tool before the repair. These loads depend on the trapezoid forked, mounted in strips as well on the angles of taper of the disks 3, gauge steer handles, a larger base which in this solution can be attached to the roll axis when

They are equal to 525 °. The diameter of their axial bore is made equal to a large diameter ring on a ring-50 of 1.02-1.05 diameters of the roll axis, and the rolling mill using this diameter exceeds the diameter of the tool to be rolled out as follows the differences

razom.ih internal diameters.

„

A bandage from a pack of disks 2, 3 and 4 is assembled on the axis 1 of the inner pressure roll of the ring rolling mill, the workpiece of the ring 8 is placed on the bandage and the outer drive roll 9 and the pressure inner roll are brought together. In this case, the metal of the ring blank 8 (Fig. 2) pushes tapered compensating disks 3, the diameter of which is larger than the diameter of the disks 4, and in the holes there is a radial clearance about axis 1; the lower part of the disks 3 pushes the entire package of disks and moves the lower part of the end disks 2, partially compensating the movement of their upper part, eliminating the distortion of the disks 2 and loading evenly the clamping bolts 5 and 6. Reducing the movement of the upper part of the disks 2 prevents the ring billet from expanding.

Example. On the rolling machine RM-2000 rolled blanks of rings made of alloy VT-6 with an internal diameter of 350 mm, na5

MANUAL 500 mm and a ring height of 80 mm. AT

As the internal roll, the proposed tool with a band of five discs was used; the angle of inclination of the end sides of the discs was 5 °; the axis diameter was 150 mm. The internal diamer of the compensating disks was taken equal to 151.5; 153; 15§; 157.5 and 160.5 mm (i.e. equal to 1.01; 1.02; 1.04; 1.05 and 1.07 axis diameter). The same rings were rolled out using the prototype tool and the tool life and metal savings were compared by increasing the accuracy of the rings.

The results are shown in the table.

As can be seen from the table, with the diameter of the hole of the compensating discs equal to 1.02-1.05 of the diameter of their axis, the resistance of the disa increases,

Claims (1)

Invention Formula Durability of disks to rings Economy of metal for reducing the allowance in thickness, kg / t 318 318 331 342 338 303 0.4 0.8 0.5 «У /// А ///// Л ЗЗ $ ///// U /// //// L ////,