SU997872A1 - Apparatus for axial mounting of rolling rolls - Google Patents

Description

The invention relates to rolling equipment and can be used for axial installation of rolls in rolling stands, mainly for mills.

A device for the axial installation of mill rolls is known. containing wedge-shaped strips, made in the form of a Y-shaped guide, a bed movably mounted in the vertical groove and connected through a drive with a cushion protrusion 1 ... .

However, in this device, an axial movement of the roll together with the pads of the seat takes place, which does not allow its use in prestressed cages and does not provide backlash-free installation of the rolls.

It is also known a device for axial installation ;; rock rolls, co. , roll it with an overhead, roll movement mechanism installed in one of the roll cushions, and hydrrr) the roll return mechanisms installed in the other cushion.

In this device, the mechanism for moving the roll is made in the form of a pressure screw enclosed in a pillow coaxially with the roll. .Loverest pole

The pressure is tightened: on the screw, and the movement in the direction that the screw is unscrewing takes place due to the efforts of the hydraulic backpressure 2.

The disadvantages of this device include larger overall dimensions, low load capacity of pa-SCHIAL bearings and the presence of threads & 2 on the cushion,

10, the cutting of which makes manufacturing much more difficult.

The closest to the technical essence of the invention is a device for the axial installation of the rolls,

15 includes a roll moving mechanism mounted on the bed of the stand 4i and interacting with the rolling roll installed in the bed in the pillows with the bearings

20 friction (PZHT) and thrust bearings, and hydraulic cylinders BOSBpiaTa. 3

A disadvantage of the known device is the effect of the roll return cylinders on the fluid friction bearing (FBL), since the simultaneous perception of the conical surfaces of the FBL and the roll force of the hydrospacing and axial pressure rolls the metal into a frit-corrosion,

30 i.e. sintering.

The hanger of this, the presence of thrust bearings, perceiving the full axial load of the rolled metal, reduces the carrying capacity of the drive end of the work roll and complicates the assembly of the bearing assembly. In addition, the obligatory fixation in the bed of both pillows in the axial position makes the design acceptable only for beds of the yellow type.

The purpose of the invention is to improve the operation of the roll supports, for example, the liquid friction bearings, by eliminating the effect of return cylinders on them and improving the accuracy of the rolled stock.

The goal is achieved by the arrangement of the axial installation of the rolls, including the roll movement mechanism mounted on the stand frame and interacting with the rolling roll mounted in said frame in cushions with fluid friction bearings and fixed bearings, and return cylinders installed between support bearings and MES, mounted on a roll from the non-drive side, with a flange with built-in 1: roll return cylinders, while the plungers of the roll return hydraulic cylinders They are tied through an intermediate ring with an end face of the support bearing, and the end of the flange with the bearing surface is “STEELY”, and the device is equipped with a sleeve on the opposite side of the above-mentioned thrust bearings, in conjunction with a roller displacement mechanism.

In this device in the frame is fixed in the axial direction and only one pillow is installed on the non-drive side of the roll, and the thrust bearings are also installed only on the non-drive side of the roll. ,

The drawing shows the proposed device, the cut.

The device comprises a frame 1 in which a pillow 2, roller 3, PZhT 4, thrust bearings 5 fixedly mounted on roll 3, levers of the mechanism for moving roll 3 fixed between thrust bearings 5 and ПЖТ 4, flange 7 sec fixed on frame 1, are installed built-in hydraulic cylinders 8 of the roll return, which through their plungers interact through the intermediate ring 9 with the thrust bearings 5, the sleeve 10 mated with the sliders of the roll movement mechanism, extract the axial installation of the roll (not shown).

The device works as follows.

By rotating the axial setting of the roll (not shown). The arms 6 of the roll movement mechanism rotate relative to the bed 1, act on the sleeve 10 and thereby the upholstered bearings 5, moving the roller 3 along the axis in the pad 2 along the HRB 4. The plungers of the hydraulic cylinders 8 of the roll return are sunk.

During rotation of the axial installation of the roll in the opposite direction, the plungers of the hydraulic cylinders 8, acting on the thrust bearings 5 through the intermediate ring 9, return the roller 3 to its original position.

The technical and economic effect from the use of the invention is formed by increasing the accuracy of rolled products.

In the proposed device, due to the axial fixation of the roll in the cushion and the cushion in the frame, the axial stress and thereby the accuracy of the rolled stock is ensured.

With the annual need for high-precision rolled products, in 151, 7 thousand tons of annual savings from the use of this device will be 64.667 rubles.

Claims (3)

1. USSR author's certificate number 332604, cl. At 21 31/18, 1970. 2. Authors certificate of the USSR 240651, cl. B 21 V 31/18, 1967. 3. USSR author's certificate number 703168, cl. B 21 V 31/18, 1977.