SU1014608A1 - Die rolling mill stand moving drive - Google Patents

Abstract

DRIVE MOBILE CLEANING MILL OF PERIODIC ROLLING, containing a connecting rod with a cage. on the eccentric of the drive shaft and its other shoulder pivotally connected with the balancing lever. W 4 ;: O 00

Description

The invention relates to metallurgical equipment, and more specifically, to the design of periodic rolling mills for pipes and long stems in both cold and heated conditions, and can be used to create drives for HPT and HPPR tube rolling mills, as well as for long rolling mill drives for high-quality metal. (rods, wire, etc.) and in the case of periodic rolling in the unit when combined with the continuous casting of varietal billets.

A known drive of a cage and a mill for periodic rolling of tubes contains connecting rods, a crankshaft and a balancing weight, which is ekrepleyyny on |) lever P,

The disadvantage of this design is that the rugged shaft of a complex multi-bearing design and deficient cutting under the rolling on the crankshaft journals leads to laboriousness and complexity of manufacturing such a drive and to an increase in its cost.

The closest drive to the mill is the drive to rewrite the stand of the periodic rolling mill tube containing a pair of connecting rods 51 / d with the cage, a double-arm lever hinged to them with one shoulder, a drive shaft with an eccentric and a balance lever with a C 2 load.

A disadvantage of the known drive is that, due to the large number of moving links and the number of hinged joints, the speed of the drive of the KEY is reduced, and the design is complicated.

The purpose of the invention is to increase the drive speed.

The goal is achieved by the fact that in the drive for moving the stand of a periodic rolling mill the content of a pair of connecting rods connected to the cage is a two shoulder arm lever connected to the stand with a single arm, a drive shaft with an eccentric and a balance arm with a weight, the two shoulder arm is mounted on the eccentric arm. and its other shoulder is pivotally connected to a balanced VS (K11 with a lever.

Fig. 1 shows the crosshead drive of a clef, longitudinal section (the trajectory of the hinges of the two shoulders is shown); in FIG. 2, a view along arrow A in FIG. 1 (the two shoulders the lever is conventionally shown in the upper position).

The drive for moving the stand of the mill for the periodic rolling of tubes contains a pair of connecting rods 3 connected to the cage 1 through hinges 2, hinges 4

attached to them by one shoulder of the double-arm lever 5, driven by the electric motor b through the gearbox 7, the shaft 8, having an eccentric 9, and the balancing lever 10 with a load 11

at the end.

The double-shouldered lever is mounted freely (i.e., through the bearing 12) on the eccentric 9 of the drive shaft, and its other shoulder is connected via a hinge 13 to the balancing lever 10, which is mounted in a stationary frame 15 by means of an axis 14 and bearings (not shown).

The cage is installed in the guides.

grooves 16 stationary bed. The swing angle of the connecting rod is determined by the angle ot-.

The drive of the movement of the stand is carried out as follows.

The motor 6 with the help of the gear 7 rotates the drive shaft 8, which in turn informs the complex movement of the two shoulders 5. The double-arm lever with the help of connecting rods 3

and hinged joints 2 and 4, the reciprocating movement of the working stand 1 along the direction of the grooves 16 in the stationary frame 15. At the same time, the double-arm lever using the hinge 13 pumps the Balancing lever 10 with the weight 11 mounted on it around the axis 14.

With the rotation of the drive shaft 8 bearing 12 two shoulders lever 5

describes a circular path

o-5-Bt-3-exM, with the hinge 13 connecting the double-arm lever with the balancing lever 10, respectively, describes an arc about (-5 - - around axis 14, and the center of gravity of the weight. 11 accordingly moves along an arc .-Bp-tr - 3p-e f - Mj. Also, around axis 14. Thus, the nature of the movement of the two shoulders

The lever 5 defines the paths of movement of the bearing 12 and the hinge 13, while the hinge 4 will describe the forced closed path

“Oh which

stretched in the direction parallel to the rolling axis. Due to the fact that the distance is shorter than the distance, the length of the connecting rods is shorter with the constant swing angle of the connecting rods cC and the constant length

the course of the cage.

A feature of the design and operation of the drive is that the relative position of the axis 14 and the drive shaft 8 relative to the connecting rod 3

provides the condition of mutual balancing of the cage, and cargo: the transfer of kinetic energy from the cage to the cargo and, conversely, from the cargo to the cage. In other words, when the speed is moving,

stand is highest (position

Bj and} f p), TO the speed of the movement of the load is zero (position ij), and, conversely, when the speed of movement of the load is greatest (the position of slr and df-} t then the speed of the movement of the stand is zero (the position of "k and e").

The proposed drive mechanism for moving the stand of the cerioli rolling mill increases the speed of rolling, thereby increasing the productivity of the mill by 15-20%.

Claims (1)

DRIVING DRIVE OF A CART OF A PERIODIC ROLLING MACHINE, comprising a pair of connecting rods, a two-arm lever pivotally attached to them with one shoulder, a drive shaft with an eccentric and a balancing lever with a load, characterized in that, in order to increase its high-speed, two-arm lever freely mounted on the cam shaft and its other arm pivotally connected to the balancing arm. "SU .... 1014608 .1