SU1062946A1 - Reciprocating movement drive of part mill of tube cold rolling - Google Patents

Abstract

THE DRIVE OF RETURN AND ADDITIONAL MIXING OF THE PARTS OF THE COLD ROLLING PIPE, containing. housing, located in the housing shaft with a crank pin on one of its ends and mounted gear, gear covering gear, us-. rotor mounted on a shaft on bearings, having a rotary-gear toothed drive and two balancing wheels. for, in order to increase the reliability of operation of the mill by fully balancing the dynamic moment on the shaft, it is equipped with a two-arm rotary relative to the stationary axis, at the ends of which balance weights are placed, equal in mass, while the shaft is equipped with an additional crank finger, located on the other end of it with an angular displacement of 180 relative to the main one, and this finger is connected to one of the weights through the pull. (L

Description

The invention relates to the field of pipe production, in particular, to cold pilgrim rolling, and concerns the improvement of the drive for reciprocating the moving parts of the HPT mill.

A known drive for moving the working stand of the cold rolling mill tube includes a drive crank shaft, a pair of curvings of which is connected to the working stand through connecting rods, and another pair of cranks through connecting rods with ypaBHOBernHB loadings.

In this case, the total mass of the goods is equal to the mass of the cage. The effectiveness of such an equilibrium lies in the fact that the dynamic loads, the displacement in the kinematic chain of the drive during reciprocating motion of the working stand, can not be transmitted to the links of this chain and the motor, but be closed directly on the drive crank shaft.

The closest known from the technical nature of the invention 1C

This is a drive for reciprocating movement of parts of stab 4ib on cold-rolled pipes, containing a casing placed in a casing wai with a crank finger at one end of it and a pinion gear, encompassing: gear gear kfesb mounted on a shaft on a rotor bearing, having a gear drive and two counterbalancing loads. . The known drive allows to unload the shaft from inertial forces. . However, the drive shaft will perceive the weight of the goods, which sharply reduces the operational reliability and durability of drive transmissions and leads to an increase in uneven running, which in turn is associated with the appearance of harmful alternating dynamic loads in the shafting. The aim of the invention is to increase the reliability of the work of the convoy by fully balancing the dynamic moment on the shaft. The chain is achieved by the fact that the drive of the reciprocating cold rolling mill tube includes a housing, a shaft housed in the housing with a crank finger at one end thereof, and a pinion mounted on a gear mounted on a shaft a rotor having a gear drive vshe} u and two balancing loads, equipped with a two-arm pbwaroM pivotal relative to the stationary axis, at the ends of which balancing weights of equal weight are placed, while the shaft is provided with an additional fold with a bearing finger, located at the other end of it with an angular displacement of 180 from this pin of the main body, is connected to one of the loads via a cable. The drive is provided with a two-arm swinging lever with a weight-balanced load at its ends. It allows the shaft to be unloaded from the weights of the weights. FIG. 1 depicts the proposed drive; figure 2 is a section along aa in FIG. 1; on fig.Z - section bb in fig, 1; Fig. 4 is a graph of the variation of the inerschi force, reciprocating) of the moving parts of the mill -F, the graph of the variation of the inertia force equalized by the shivayod1x freights -F; Fig. 1 shows the dynamic moment variation on the crank iiiMnHOM shaft M due to the inertia force -F and the graph of the total dynamic moment on the crank shaft. The drive of the reciprocating movement of the parts of the cold-rolled pipes includes a housing 1 fixed on the frame 2 with the guides 3, the slider 4, placed in shaft 5; With the cranks 6 and 7, the angle between which is 180 ° and which have a crank pin 8, connected via a bearing 9 with a slide and a TRAIL pin 10, mounted on a key 11 on the shaft gear 12, gear pinning gear with 13, rigidly mounted in the housing. and a rotor 16 mounted on a shaft on bearings 15 fixed in rotation on a shaft 14 mounted on bearings 17 in a housing and having a gear drive of rotation in the form of a gear pair 18, whose high-speed shaft 19 is connected to the main drive of the mill, a double arm 20 with a stationary a swing axle 21 placed in bearing supports 22 fixed to the frame, balancing weights 23 and 24 located at the ends of the lever, one of which is connected by means of the hook 25 and the bearing 26 to the crank pin 10, bearing weight 27. Balancing loads 23 and 24 are equal in mass, and the radius of the initial circumference of gear 12 is equal to the length of half-curvature 6 and half of the radius of the initial circumference of the non-swiveling gear 13. The drive of the reciprocating displacement of the 1-millimeter HPT works as follows. The uniform rotation of the rotor 16 in the bearings 17 relative to the housing 1 and the fixed gear 13 is carried out by a gear pair 18, the high speed shaft 19 of which is connected to the main drive of the mill (not shown). Together with the rotor about the axis of its rotation, the shaft 5 rotates with a rigidly fixed means. bristles pins 11 12. The gears, rolling around inside the stationary gear 13, rotates the shaft 5 of its own axis of rotation in the bearings 15. From the body of mathematics it is known that the point of the circle rolling without a circle inside the girlfriend is a hypocycloid, the number whose branches are equally relative to their radii. If this ratio is equal to two, then the two branches of the hypocycloid are extruded into the diameter of the large fixed circle, and the above point moves linearly along the diameter of the fixed circumference according to the cosine law, which follows from the equation of motion of the point describing the hypocycloid in the case of internal rolling 9 when the radius

the small circle is half the radius of the larger fixed circle. It should be noted that one rotation; the DUT of the center of the small circle relative to the center of the fixed circle corresponds to two displacements of a point along the diameter — back and forth. In relation to the proposed drive, the crank pin 8 of the crank 6 moves along the diameter of the fixed gear 13 in the cosine law in the horizontal direction and through the bearing 9 moves the slider 4, and the crank finger 10 of the crank 7 moves along the diameter of the stationary gear 13 along the cosine law in the vertical direction in the vertical direction through the bearing 27 moves the tgu 25. Th ha 25, in turn, moves the balancing weight 24.

The harmonic nature of the change in the movement of the slider and the counterbalancing load determines the cosine-like character of the change of the yeri forces Fg

and; and movable masses F

sine wave ha: the pattern of change

the cusche moments of M. and M „on the shaft

 2

(see Fig. 4), and the equality of their displacements and masses causes equal values of accelerations (graphs in Fig. 4 are not shown) of the iner Al type and dynamic moments as a function of the rotation angle cp of the rotor 16. Diametrically opposite arrangement of the curvature

7 relative to the crank 6 allows in the proposed drive to fully balance the dynamic moments M and M with each other.

on the shaft (see Fig. 4, Mg. 0), because the acceleration of one mass (slider) corresponds to the braking of the other mass (balancing load) and vice versa. However, in the vertical movement of the balancing weight 24, the shaft 5 is acted upon by the weight of the load, which is transmitted by the gear 12 fixed on the shaft to the fixed gear 13, the rotor 16, the gear 18 and the main drive of the mill. In order to eliminate the alternating moment on the shaft from the weight of the balancing weight 24, the weight of the weight 23, equal to the weight of the load 24, is placed at the other end of the swing arm 20 symmetrically with respect to the swing axis, thereby eliminating the effect of the torque on the shaft.

The complete balancing of the dynamic moment on the crank shaft of the drive for the reciprocating movement of the HPT mill allows to increase the mill productivity and increases its reliability and durability of power units and mechanisms.

A reciprocating drive is taken as the basic object.

5 NIN parts of the mill HPP-8-40. The expected economic effect is 399,537 rubles. in year.

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Claims (2)

THE DRIVE OF RETURN AND ADDITIONAL MOVEMENT OF THE PARTS OF THE COLD COLORING PIPE, containing, a housing placed in a housing with a crank pin on one of its ends and a pinion gear, covering the gear wheel, is a gear. 2 _. a rotor mounted on a shaft on bearings, having a gear drive rotating and two balancing loads; for that, with the aim of increasing the reliability of the mill by fully balancing the dynamic moment on the shaft, it is equipped with a two-arm pivotal with respect to the stationary axis, with balancing weights at equal ends , at 5 of this, the shaft is provided with an additional crank pin located at the other end of it with an angular displacement of 180 ° relative to the main one, and this pin is connected to the a ONE OF CARGO. .