SU556853A1 - The bed of the mill stand helical rolling - Google Patents

Description

one

The invention relates to the rolling of metals and relates to the improvement of a two-roll shank of a helical rolling mill intended for piercing sleeves or rolling in pipes in tube-rolling machines.

Known cage machine helical rolling ij, the frame of which has a base cover. The lid is fixed to the base of the bed with bolts and bolts .. a1m.

The support drum is fixed by means of locking devices built into the cover.

The disadvantage of such stands is the difficulty of reloading the work rolls through the windows in the lid and the unreliable fixation of the drums, which is manifested in the longitudinal vibration of the support drums relative to the base and the lid.

Known to the bed frame, the two-roll stand of the helical rolling mill f2, comprising a base, a lid hinged on it, its driving screw turning mechanisms and driving eccentric locks. In combination with eccentric

locks in the cage provided drive wedge. The nut of the screw mechanism for turning the cover in this cage is mounted in the wheel hub of the gear drive of the mechanism. The rolling force in this design is perceived by the bearings of the gearbox, which adversely affects the performance of the gearing and reduces the load capacity of the stand. The aim of the invention is to simplify the maintenance of the stand during the transshipment of the supporting drums with work rolls and increase the load capacity of the stand.

Claims (2)

The goal is achieved by the fact that in the stand of the mill stand there is a screw rolling containing a base, a lid hinged on it, its driving screw turning mechanisms and driving ones. eccentric locks, each eccentric} The single lock is combined with the nut of the screw turning mechanism and is formed by the outer and inner double-support iC cross-beams, which are eccentrically mounted. one is relative to the other. This allows, after replacing the support drums with work rolls and PS from the energizing switch and screwing the screw screw, turning the cover automatically turns on the driving eccentric lock. When the bearing pivots are rotated in the external traverse, a partial movement of the internal traverse along with the screwed screw mechanism MGM AND the lid is simultaneously caused. At the same time, the cover is automatically pressed against the support drums and the latter are securely locked. FIG. 1 shows a twin roll stand of the helical rolling mill of FIG. 2, section A-A in FIG. one; in fig. 3 - section bb FIG. one; in fig. 4 is a sectional view of FIG. 1 in FIG. 5 - section GG in FIG. 1; in fig. 6 is a section DDD FIG. 5. The stand of the stand of the helical rolling mill contains the base 1, the cover 2, the elastic buffer 3 and the pressing drums 4 with the work rolls 5 against the wear bars 6 of the base, two axes 7 connecting the cover with the base pivotally. Since, in a two-roll stand of a helical rolling mill, due to the rotation of the drums with work rolls, the rolling force is directed to the angle so that one drum is pressed to the base and the other to the lid, the elastic buffer is placed in the part of the lid where the drum It is forced by the forces of prokagki to the base. Calsdy screw mechanism of rotation of the cover includes a support node 8, installed with the help of a hinge 9 on the roof and connected to it the gearbox 10, which interacts with the screw 11 through the splines 12, the drive 13 of the gearbox. The nut 14 of each screw lid rotation mechanism with the base through the corresponding eccentric lock, which is connected with the lid with the partial movement of the lid together with the screw mechanisms and, is formed by the outer 15 and inner 16 double support beams, the trunnions 17 and 18 are installed eco-friendly Oia is different. The drive (eccentric locks) is made of power cylinders 19, the rods 2O of which are connected to levers 21 connected to corresponding pins 17 of the outer traverse IS covering the pivots 18 in the base bearings. The device works as follows. To transfer the drum 4 with the work rolls 5, the drive 13 of the gearbox 10 is turned on, driving the screw 11 of the mechanism for turning the cover 2. The screw, interacting with the nut 14, hinged to the base 1, moves, acting on the cover 2 through the support assembly 8, The curvature rotates relative to the hinge axes 7 and takes up half-collapse, providing transshipment of the drums 4 with the work rolls 5. Next, in a known manner, the old is unloaded and the new drum set is loaded with the work rolls and the diameter of the rolled pipe and the installation of drums at the desired angle of the work rolls. After the cover 2 is retracted in reverse order, the eccentric lock drive is automatically activated. In this case, the power cylinders 19 rotate the trunnions 17 of the outer cross member 15 by means of the lever 21 and the stem 20 in the base bearings 1. When the supporting trunnions 17 of the outer cross bar 15 rotate relative to the eccentric pins 18 of the inner cross bar 16, the inner cross bar partially moves along with the screwed lid screw mechanism 2. Due to this, the process of stopping the stoppers with working rolls is fully automated. The invention of the stand of the stand of the helical rolling mill, containing the base, the lid hinged on it, its driving screw turning mechanisms and driving eccentric locks, which, in order to increase the load capacity of the stand, each eccentric lock is combined with a nut of the BINT mechanism rotation of the lid and formed by the external and internal double-support cross-arms with trunnions mounted eccentrically one relative to another. Sources of information taken into account in the examination; 1. Soloveychik P.M. Pipe-rolling units with an automatic machine, D., Metallurgists, 1967, pp. 28-52. 2, Copyright certificate number 45O605. B 21 B 19/00, 1973. ig. 3 CGL