SU1784319A1 - Device for insetting strip into rolling cage rolls - Google Patents

Description

The invention relates to rolling production and can be used in rolling shops of plants of ferrous and non-ferrous metallurgy.

In the practice of rolling production, a rolling method is known in which a strip is rolled between two rolls rotating with a mismatch in peripheral speeds equal to the hood, and the rolls are then covered with a strip.

A device is known for covering rolls with a strip in a rolling stand, comprising curved guide wires with eyelets at the connector points, through which rods are mounted mounted on the rods of additional hydrocylinders.

The disadvantage of the design of this device is the sticking of the strip in curved wiring, especially when refueling thick strips, which leads to the drilling of the strip in the wiring.

Closest to the invention according to the technical essence and the achieved result is a device for covering the rolls with a strip in a rolling stand, containing for greater coverage of the roll with a strip curved levers fixed with shafts, bypass and pressure rollers mounted respectively in the middle and at the ends of the levers, locking means leverage.

However, this device has several disadvantages, the main of which are the complexity of the device and the increase in the size of the stand, the installation of additional equipment, in particular rollers to keep the strip in a horizontal position.

The aim of the invention is to ensure reliable filling of the strip without poking.

This goal is achieved by the fact that in the device for refueling the strip into the rolls 5 along a 5-turn path, containing a linear guide, bypass rollers; aakpenTieHHHe at the ends of levers mounted on both sides of the rolls; Equipment for turning levers about 10 axis of their installation, rear and front drive pulling rollers for moving strips before and after rolls along the rolling axis, according to the invention, levers are mounted on the same axes as pulling rollers with the possibility of turning them about the axis of the rollers, for example, with the help of hydraulic cylinders, the rod of which is attached to the bottom of the guides for rectilinear movement of the strip, which are attached to the lateral 20 walls of the levers, at the ends of the levers mounted on the side of the task and the exit of the strip relative to other from each other are mirrored, three gummed rollers are fixed in contact with each other, in both cases of non-drive, interconnected by gears, the extreme roller of each of the levers located closer to the horizontal plane passing through the deformation zone for a while dressing strip is in contact with the work roll.

Figure 1 presents a General view of the device for filling the strip in the rolls; figure 2 is a section aa in figure 1; in Fig.Z - 35 ‘solid lines represent the kinematics of the proposed device, and dashed lines represent the prototype.

The device for refueling the strip into the rolls consists of curved guides 1, covering the rolls along an S-shaped path, drive pulling rollers 2 installed by the doy after the fio stand of the rolling axis, levers 3 mounted on the same axes as the pulling rollers 2 with possibly 45 by turning them relative to the axis of the rollers' by means of hydraulic cylinders 6. three non-driven gummed rollers 4 mounted on rolling bearings in contact with each other, connected by gear teeth 8 with a gear ratio Ί = 1 and fixed and at the end of each of the levers using a cover 9, guides 5 for the rectilinear movement of the strip 7, attached to the side 55 walls of the levers 3.

The device operates as follows.

With the pulling rollers 2 installed up to the stand, the strip 7 is set in the guides 5, the lever 3 on the task side of the strip is in this horizontal position; as soon as the strip 7 is in front of the entrance to the throat of two adjacent rollers 4, the lever 3 mounted on the sliding bearings rotates relative to the axis of the pulling rollers from the horizontal upward to an angle that feeds the strip tangentially to the upper roll, while the lower (third) roller 4 is in contact with the rotating upper roll, providing through the gearing 8 reliable rotation of the first two rollers 4, also pulling the strip?, Which, bypassing the curved wires 1 and sequentially bending around the upper and lower rolls tangentially, p ohodit between two rotating lower rollers 4, the guide 5 of the lever 3, which is arranged specularly relative to the arm 3 on the input side and executes the same job. When rolling the strip, the levers 3 from the input and output sides of the strip are retracted to a horizontal position (it is shown by a dotted line in Fig. 1) and are fixed.

At the Novosibirsk Metallurgical Plant. A.N., Kuzmina installed a PV-800 cold-rolling strip mill operating using the rolling-drawing process with a strip covering the rolls. At the mill, according to the prototype, a refueling device was used containing pulling rollers mounted on the task side and the strip exit from the cage immediately before the curved levers, which are in the open states before filling the strip into the mill, as shown by the dotted line in FIG. 3; curved levers fixed with shafts on the side racks of the frame. Between the pressure rollers mounted on the ends of the curved levers and the drive shafts relative to which these levers are rotated, bypass rollers are installed. This filling device worked as follows; a strip of low-carbon steels 08 KP, St. Z. et al. with a thickness of 0.4-3 mm and a width of 400-600 mm in the annealed state by pulling rollers was set in the rolling mill cage and then to the winder. Then the roll drives were turned on, with the help of which the curved levers rotate, capturing the strip with the pressure rollers. In this case, the pressure rollers bend around the strip around the work rolls by an angle, the value of which is determined by the design parameters of the device, and the bypass rollers exclude touching the branches of the strip extending to the winders with branches covering the work rolls.

The locking of curved levers with bypass and pressure rollers in the working position is carried out by ratchet bands and dogs.

The main disadvantage of this design is the complexity of the device, leading to an increase in the dimensions of the stand and in general the entire line of the mill.

Although this refueling device eliminates such a drawback as sticking the strip into the rolls, it leads to the installation of additional equipment, in particular additional rollers, I’m holding; lining the strip horizontally to the stand and especially beyond the stand, because the roller, which receives the tension from the strip’s tension, is located above the strip, which complicates and increases the cost of the structure. !

Using the proposed device provides high reliability when refueling strips of any thickness, reduces the dimensions of the stand and the mill line, which can be seen from the kinematic scheme in Fig. 3, significantly reduces the cost of manufacturing a filling device (in comparison with the prototype by 40%).

Claims (1)

'Claim A device for refueling strips in rolls of a rolling stand along an S-shaped path, including curved guides, rollers fixed to the ends of levers mirror mounted on both sides of the rolls; piston drive of turning the levers relative to the support axis, rear and front drive pulling rollers for moving the strip up to the rolls after the rolls along the rolling axis, which is to ensure reliable filling of the strip without sticking it in the rolls, the levers are freely mounted on the axes of the corresponding pulling rollers, the levers are equipped with straight guides for the strip and side walls to which the guides are attached, the rollers at the ends of the levers in the amount of three are gummed, installed in contact between minutes and interconnected toothed gears, with extreme roller of each arm is mounted for contact with the roll. _; FIG. f D-fl boot i Phi * 3 ... t \ .. \ \