SU804029A1 - Rolling stand screw-down mechanism - Google Patents

Description

one

The invention relates to metallurgical engineering and can be used in sheet rolling mills to control the parallelism of the axes of the work rolls.

Pressure devices of rolling stands with a screw drive of pressure screws are known, in which the parallelism of the axes of the work rolls is adjusted by driving the pressure screws when the kinematic connection of screws 1 is disconnected,

The disadvantage of such a pressure device is that after switching on the gear clutch of the kinematic connection mechanism of the pressure screws, there is a partial mismatch of the parallelism of the work rolls.

The mechanisms of the angular adjustment of the rolls without disconnecting their kinematic connection are known, which contain a gear coupling with two gear rims, one of which is made helical 2.

However, the use of such a mechanism on the press stand of a rolling stand requires an additional drive for the mechanism, and also excludes the possibility of using the roll solution pointer to adjust the parallelism of the axes of the work rolls.

Known pressure device

rolling stand containing push screws, screw drive screw screws and a mechanism for adjusting the parallelism of the axes of the work rolls, made in the form of a gear coupling

a clutch mounted between the shafts of a worm drive and containing a holder and two gear rims, one of which is helical 3.

The disadvantage of this device

is that the mechanism for adjusting the parallelism of the axes of the work rolls has large dimensions and weight due to the low load capacity of the conic and worm gear, and also requires the installation of an additional motor to drive it,

The purpose of the invention is to simplify the design of the pressure device and

decrease in its metal intensity.

The goal is achieved by the fact that the clutch of the gear coupling is connected by means of a self-braking thread to the sleeve, which is equipped with a worm drive shaft and which is rotatably mounted on this shaft and provided with a brake disc.

FIG. 1 shows a pressure device, top view; FIG. 2, section A-A in FIG. one.

The pressure device contains pressure screws 1, kinematically connected with electric motors 2 through screw gears 3 and mechanism 4 for adjusting the parallelism of the axes of the work rolls, comprising gear sleeve 5, mounted on high-speed shaft of worm gear and mounted on shaft 8 intermediate compound. The yoke 9 of the gear coupling is connected to the nut 1 which is screwed onto the self-braking thread of the sleeve 11. The sleeve 11 is rotatably mounted on the shaft 8 of the intermediate connection, fixed axially connected to the brake disk 12, FIG. 2 sleeve 11 and the brake dis 12 are made as one piece. The hydraulic cylinders 13 are installed on the cage bed. One of the gear teeth of the coupling is made helical,

The device works as follows

With an established technological process, the mechanism for adjusting the parallelism of the axes of the work rolls works like a gear clutch, which contributes to the synchronous rotation of the pressure screws. When the parallelism of the axes of the work rolls is broken, the hydraulic cylinders 13 are engaged, which brake the brake disc 12, preventing rotation of the bushings 11. The electric motors 2 for driving the drive screws are activated and, depending on the direction of their rotation, the sleeve 9 moves to the right or left. Due to the fact that one of the rims of the gear coupling is made helical, the axial movement of the yoke 9 causes a relative rotation of the shaft biv and, accordingly, the relative axial displacement of the pressure screws.

Claims (3)

1.Tselikov L.I. and Smirnov V.V. Rolling mills. M., Metallurgizdat, 1958, p. 98, fig. 87 2. US patent 3686918, cl. 72-198, published. 1972, 3. The US patent 1825957, class 72-248, published. 1933. 12 // / / 9 7 / I //// //// L ///// 2L