SU417204A1 - - Google Patents

Description

one

This invention relates to the field of tube rolling.

Known front tables rolling mills, including Llitu with racks under the chute and a screw lifting mechanism chute driven by a gearbox.

These tables have a small ratio of the length of the way you want the gutter to the height of the posts in which the gutter is mounted.

But the greater this ratio, the greater the durability of the table, since the greater the contact surface of the chute and the supports and the greater the resistance of the table to loads perpendicular to the longitudinal plane of the table. The gearbox lifting mechanism gutters perceived shock loads from the workpiece in the rolling process. This leads to frequent breakdowns of the bearings of the gearbox, failure of the gearing. The reducer itself is in the zone of action of water, scale and dirt, and it is almost impossible to protect it. It also reduces its reliability and durability.

The aim of the invention is to increase the durability of the table.

For this, the proposed front table of the rolling mill is provided with an intermediate support fixed to the plate, in which the nut of the screw mechanism and the screw drive gearbox are placed, and there is an elastic element between the groove and the screw.

FIG. 1 shows the proposed front table of the rolling mill, general view; in fig. 2 is a section along A-A in FIG. 1 (on an enlarged scale).

The table consists of a cast movable groove 1 with lateral guide planes which go into racks 2 and 3 mounted on one plate 4. Lifting groove 1 is carried out by a screw mechanism, including screw 5 and a nut 6. The screw mechanism, in addition, has a drive from the gearbox 7. On the plate 4 between the uprights 2 and 3 and the movable chute 1, a propeller support 8 is fixed. On one side of the intermediate platform, there is a nut 6 of the screw mechanism, and on the other side the gearbox 7 of the screw drive is fixed. Between the movable groove 1 "screw 5 there is an elastic element 9.

In the process of work, when the next billet of a different diameter is fed into the chute, its axis is aligned with the axis of piercing by turning on the drive 10 of the screw lifting mechanism. When the gearbox 7 rotates, the movement through the splines 11 is transmitted to the screw 5, which, turning into the nut 6, through the spherical support 12 and the elastic element 9 presses against the movable chute 1 and lifts it up to the joint of the axis of the workpiece. The impact load of the workpiece on the chute is reduced by the installation of elastic

elements 9 fp is delivered from screw 5 through nut 6 and intermediate support 8 to common plate 4. In this case, the gear 7 is freed from the load and protected from ingress of water, scale and dirt.

Such a table structure allows an increase in the ratio of the length of the guide grooves to 1ВЫ: Honeycomb racks in which groove 1 is mounted. This contributes to an increase in the rigidity of the structure | When holding the workpiece during rolling, as well as table reliability and durability.

Subject invention

The front table of the rolling mill, (CO includes a plate; stand for the chute and screw mechanism of the chute with actuators from the gearbox, characterized in that, with a table durability enhancement slot, it is equipped with an intermediate support fixed to the plate, in which there is a secret screw mechanism and gear drive screw, and between the chute and the screw is an elastic element.