SU1194522A1 - Mill for periodic rolling - Google Patents

Abstract

MILL FOR PERIODIC ROLLING, containing a frame, shells installed in it, having a turning drive with conical pairs, work rolls with a variable profile, a brook and notched cutting and interacting gears of turning the rolls interacting with it; that, in order to simplify set-up and maintenance, it is equipped with elastic couplings in the gears of rotation of the rolls and mechanisms for the radial movement of the roll bodies, executed in the form of supports installed in the frame with adjustable longitudinal movement and bearing axles with levers pivotally connected to the bodies, each of which is mounted eccentrically to the shaft of the tapered wheel of the body turning rotation on the crank and rotatable relative to the curvature on which one of the gears of rotation of the rollers is fixed; from the axis of the shaft of the bevel gear to the axis of the crank and the axis of the lever, from the axis of the curved tenon to the axis of the roller and the axis of the hinge connecting the lever to the body and from the axis of the roller to the axis of the hinge connecting chaga with a body are respectively 0.625; 1.75; 2,125; CO 4 1.75, 1.625 of the length of the lever. next you

Description

The invention relates to rolling production and can be used for the periodic rolling of pipes and profiles. The aim of the invention is to simplify the setting and ensure healing. Fig. I shows the camp, general view, in section; figure 2 - section aa in figure 1; Fig. 3 shows a kinematic drive scheme for one roll; FIG 4 is a kinematic diagram of a class; figure 5 is a sequence diagram of the angles of rotation of the gears and the housing; Fig 6 is a view of B 2 and 2 (elastic. muff | Ta). The mill contains a frame 1, shafts 4 mounted on supports 2, conical pairs 4 connecting them, cranks 5 with mounted bis bodies rigidly fixed on them with wheels 7 toothed rolls with gears 8-11, rolls 12, having gear cuts 13 and mounted on axles 14, elastic couplings 15, supports 16 of the mechanism of radial movement of the roll bodies, supporting axes 17 with levers 18, hinges 19 located in the levers, connecting-levers to the cases, adjusting screws 20, nuts 21 driving rollers 22, wiring 23, engine 24 and gear 25. The housing 6, together with the crank 5 and the lever 18, is a four-link articulated four-link straight-guide mechanism, which, with a link ratio of 625 DB; DO 1.75 DB; AC 2.125 DB; , 75 DB; , 625 DB allows to obtain a part of the trajectory of the center of the work roll, which is close to the straight line, which eliminates cyclic waviness during rolling and simplifies calibration. The provision of the mill with mechanisms for radial movement of the roll bodies is made in the form of supports 16 installed in the frame 1 with adjustable longitudinal movement, and bearing axes 17 with levers 18 that are pivotally connected to the housing 6, allows changing the trajectory of movement of the center of the work roll 12 i.e. adjust the caliber of the rolls. The camp works as follows. The workpiece is supplied by the setting rollers 22 through the wiring 23. The twisting moment from the engine 24 through the gearbox: the gearbox 25 is transmitted to one of the shafts 3, and then through the conical pairs 4 to the remaining shafts that rotate the cranks 5, which cause the casing 6 rotating the crank, the work roll 12 for each rolling cycle describes a closed curved path with a straight line segment. The deformation of the metal occurs only during the forward stroke of the work roll. When the mill is idling, the protrusions A and B of the elastic coupling 15 (Fig. 6) are in constant contact, i.e. The work roll 12 and the crank 5 are synchronously rotated, interconnected by a roll rotation gear, including a wheel 7 rigidly fixed on the crank, gears 8-11 and a gear 13 on the work roll 12 with a total gear ratio equal to one. During forward travel, when the work roll 12 comes into contact with the billet, the synchronism of rotation between the work roll 12 and the crank 13 is broken, the rotation angle of gear 10 is greater than gear 11 (Fig. 5, curves H and H). Here, the protrusion A of the clutch 15, associated with the gear 10, and the protrusion B of the same clutch, associated With the gear 11, is consumed. After the roll leaves the contact with the metal by springing the "elastic coupling, the protrusions return to their original position, i.e. the protrusion A comes into contact with the protrusion B. By the time of the beginning of the forward stroke, the work roll is set in the initial position. I To adjust the gauge, rotate the adjusting screws 20, which move the supports 16. The proposed mill, as compared with the base mill, allows increasing productivity by 1.9 times, reducing the wear of working wafers, and simplifying calibration and tuning of the mill.

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Claims (1)

(.54) A PERIODIC ROLLING MACHINE, comprising a bed, housings installed therein, having a rotary drive with conical pairs, work rolls with axles of a variable stream profile and gear cutting located in the housings on the axes and gear roll rotation gears interacting with it, characterized in that that, in order to simplify settings and maintenance, it is equipped with elastic couplings in the gears for turning the rolls and mechanisms of radial movement of the roll housings, made in the form of supports installed in the frame with the possibility of p guided longitudinal movement and bearing axes with levers pivotally connected to the "bodies, each of which is mounted eccentrically to the shaft of the conical wheel of the body turning drive on the crank and can be rotated relative to the crank on which one of the gear wheels of the roll rotation is rigidly fixed, while the distance from the axis of the shaft of the conical wheel to the axis of the crank and the axis of the lever, from the axis of the curve to the axis of the roll and the axis of the joint; the unity of the lever with the housing and from the axis of the roll to the axis of the hinge of the connection of the lever with the housing are 0.625, respectively; 1.75; 2.125; 1.75 ‘, 1.625 of the length of the lever.