RU2294254C2 - Apparatus for feeding blank to rolling mill - Google Patents

Abstract

FIELD: rolled stock production, namely apparatuses for transporting and feeding to rolling mill blanks such as ingots, continuously cast billets, tube blanks.

SUBSTANCE: apparatus includes driven rail car; horizontal platform with lateral walls mounted in frame of car with possibility of changing its position. Platform is provided with driven roller table and it is arranged normally relative to axis of frame of car. One lateral wall of platform is jointly secured to struts rigidly mounted in frame of car. Second lateral wall is joined with mechanism for slightly rocking platform and made in the form of "screw-nut" transmission whose nut internal gearing is engaged with sleeve rigidly secured to lateral wall mounted with possibility of motion on screw of said transmission. Upper end of nut engages with said sleeve along spherical surface. Base of screw is provided with spherical bearing unit arranged in hollow shaft of reduction gear and joined with it through internal gearing. Teeth of shaft are engaged with rotation drive unit of screw. Said drive unit is stationary mounted on car frame. Radiuses of spherical surfaces of nut and screw are coincided with radiuses of turning of engaged gear wheels.

EFFECT: enlarged manufacturing possibilities of apparatus due to feeding different-diameter blanks, improved efficiency of apparatus.

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Description

The invention relates to rolling production, and more specifically to devices for transporting and transferring billets to a rolling mill: ingots, continuously cast billets, pipe billets.

A device is known for supplying a workpiece to a rolling mill, comprising a drive rail trolley moving perpendicular to the axis of rolling, and two parallel axes of the rolling mill and mounted relative to each other on the frame of the rolling table carriage for feeding the tube billet directly to the mill (US Pat. No. 20066336, cl. 80-13, declared on 05.22.1933, published on 2.07.1935).

The workpiece on the roller conveyor is fed by a lever shifter. Roller on the trolley mounted without the possibility of changing position in height.

The disadvantage of this device is that only one size can be used, since the feed roller tables are not able to change their position in height.

The closest in technical essence is a device for feeding a workpiece to a rolling mill, containing a drive rail trolley, a platform horizontal with side walls, mounted on the frame of the trolley with the possibility of changing position and a drive for moving the trolley (ed. Certificate of the USSR No. 1794519, V 21 V 39 / 02, declared on June 25, 1991, published on February 15, 1993).

The platform rests by means of hinges on four vertical parallel racks, freely sitting on axes fixed on the frame. The platform with the workpiece located along the axis of the frame is rotated 180 ° and the workpiece (ingot) is laid on the receiving roller table of the rolling mill located along the axis of the device.

A disadvantage of the known design of the device for feeding the billet to the rolling mill is that its technological capabilities are insufficient, since when changing the size of the billet laid on the receiving roller of the rolling mill, additional devices are required to install the billet along the axis of the rolling mill.

In addition, the performance of this device is insufficient, since the trolley carrying the platform with the workpiece moves along the axis of rolling and, therefore, it is impossible to use several heating furnaces or billet mills to service the rolling mill without additional transfer devices.

The objective of the present invention is to provide a device for feeding billets to a rolling mill, which has wider technological capabilities and allows to increase the productivity of the mill by feeding billets of different diameters.

The problem is achieved in that in the device for supplying billets to a rolling mill containing a drive rail trolley, a platform horizontal with side walls mounted on the trolley frame with the possibility of changing position and a trolley moving drive, according to the invention, the platform is equipped with a drive roller table and is perpendicular to the axis of the frame trolleys, while one side wall of the platform is pivotally mounted on racks rigidly mounted on the frame of the trolley, the second wall is connected to the swinging mechanism platform, made in the form of a screw-nut transmission, the nut of which is connected by an internal gearing to a sleeve rigidly mounted on the side wall of the platform and mounted with the possibility of movement on the screw, the upper end of the nut interacting with the sleeve on a spherical surface, the base of the screw is provided a spherical support installed in the hollow shaft of the gearbox and the internal gearing connected with it, and the shaft is connected by gearing with a rotational drive of the screw fixedly mounted on the trolley frame, moreover, the radii of the spherical surfaces of the nut and screw coincide with the radii of rotation of the gears.

Such a constructive implementation of the device for feeding the workpiece to the rolling mill allows it to expand its technological capabilities due to the fact that the swing of the platform allows you to raise and lower the workpieces within the specified limits without changing their horizontal location, and thereby establish the axis of the workpieces of different diameters axis of the rolling mill. The spherical surfaces of the screw and nut allow the screws to deviate from the vertical position in any direction, to compensate for the displacements of the platform hinges when it is swinging, changing the size of the platform depending on the ambient temperature and inaccuracy of installation.

To explain the invention, a specific embodiment of the invention is provided below with reference to the accompanying drawings, in which:

figure 1 - shows a device for feeding a workpiece to a rolling mill, front view;

figure 2 is the same, plan view;

figure 3 is a view of B in figure 1;

figure 4 is a view In figure 3;

figure 5 - section GG in figure 2.

A device for supplying a workpiece to a rolling mill consists of a drive rail trolley containing a frame 1 and a pair of wheels 2; a horizontal platform 3 with side walls 4 and 5 mounted on the frame 1 of the trolley perpendicular to its axis with the possibility of rocking; drive roller table 6 mounted on the platform 3; drive 7 rocking platform 3; drive 8 for moving the trolley along a rail 9 located perpendicular to the axis of the rolling mill (not shown).

The side wall 4 of the platform 3 is pivotally mounted on the uprights 10, which are rigidly mounted on the frame 1. The side wall 5 of the platform 3 (Fig. 3) is provided with bushings 12 rigidly mounted on the brackets 11, by means of which it is connected with the swinging mechanism of the platform 3.

The swinging mechanism of the platform 3 is made in the form of a screw-nut transmission (Fig. 5). Each sleeve 12 is mounted on a screw-nut transmission screw 13 with a possibility of movement relative to the screw 13 and is connected to the transmission nut 14 by gearing 15. The upper end face of the nut 14 interacts with the sleeve 12 on a spherical surface 16. The transmission screw 13 is provided with a spherical base a support 17 installed in the hollow pin 18 of the gearbox shaft 19 and the internal gearing 20 connected thereto. The radii R of the spherical surfaces 16 and 17 of the nut 14 and the screw 13 coincide with the turning radii of the gears 15 and 20. The shaft 19 is closed lennogo thereon the bevel gear 21 supported by bearings 22 and associated gearing to shaft 23, is connected to the actuator 7 of rotation of the screw (rocking platform).

The ends of each roller 24 of the drive roller 6 are mounted on bearings 25 on the platform 3, the covers 26 of which are equipped with struts 27 for supporting heat insulation boards 28. At one end of each roller 24, sprockets 29 are connected to each other by a chain 30 for transmitting rotation from one of rollers 24 connected to the shaft of the gearbox 31 and, therefore, to the electric motor 32 mounted on the platform 3.

All drives are equipped with locking mechanisms 33, 34, 35.

To ensure high-performance operation of the mill on the track 9, two drive trolleys are installed for alternately supplying the workpiece to the mill from parallel feed conveyors (not shown). Under the rail path 9 is a pit (not shown) for the location of current collectors for drives of the device.

The device operates as follows.

The drive trolley moves along a rail 9 located perpendicular to the rolling axis. From the feed roller table (not shown), the blank 36 is fed to the roller table 6 and by moving the frame 1 along the rail 9, the blank 36 on the roller table 6 is set along the rolling axis in the horizontal plane. The diameter of the workpiece 36 is equal to D _max and D _min . The extreme lower position of the roller table 6 corresponds to the maximum diameter of the workpiece D _max . For installation on the rolling axis of the workpiece of smaller diameter in a vertical plane include a drive 7 of the rotation screw 13 of the transmission screw-nut. The nuts 14, moving along the screws 13, act on the sleeve 12 and begin to rotate the platform 3, raising the side wall 5, and thereby change the height of the workpiece. The spherical surfaces of the sleeve 12 and the nut 14 and the spherical support 17 of the screw 13 allow the platform 3 to tilt at an angle necessary to set the workpieces along the axis of the rolling mill in a vertical plane.

The proposed device for feeding the billet to the rolling mill in comparison with the known ones allows to use billets of various sizes without additional reconfiguration of the rolling equipment, to reduce the metal consumption by eliminating the shifters, and to increase productivity.

Claims (1)

A device for supplying a workpiece to a rolling mill, comprising a drive rail trolley, a platform horizontal with side walls, mounted on the trolley frame with the possibility of changing position, and a trolley movement drive, characterized in that the platform is equipped with a drive roller table and is perpendicular to the axis of the trolley frame, while one side wall of the platform is pivotally mounted on racks rigidly mounted on the frame, the second wall is connected with the platform swing mechanism, made in the form of a “screw - nut ", the nut of which is connected by an internal gearing to a sleeve rigidly mounted on the side wall and mounted to move on the transmission screw, the upper end of the nut interacting with the sleeve on a spherical surface, the base of the screw provided with a spherical support mounted in the hollow shaft of the gearbox and connected with it internal gearing, and the shaft with gearing is connected with a screw rotation drive fixedly mounted on the trolley frame, and the radii of the spherical surfaces of the nut and NTA coincide with the turning radius gearing.

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