SU1507469A1 - Rolling/forging mill - Google Patents

Abstract

The invention relates to rolling production, in particular, to step rolling mills, designed to produce billets of simple and shaped profiles with large cuts. The purpose of the invention is to increase productivity and increase reliability by reducing the axial forces acting on the strip. The rod 7 for fastening the roll 4 is pivotally fixed on the lever 6 between the hinges 9 and 10 of its fastening to the stand and the stand, which makes it possible to achieve equal length of the deformation cone to the stand movement. This naturally reduces axial forces acting on the strip. Reducing axial forces reduces the effect of dynamic forces on the driver, which increases the reliability of the mill. This also makes it possible to move the hinge of the rod attachment to the roll from the rolled metal. You can carry out rolling on this mill with an increased number of moves, which increases the productivity of the mill. The productivity of the mill also increases due to the possibility of moving the rod 7 along the lever 6, which reduces the labor costs for changeovers of the mill when moving to a different size of the workpiece. 3 hp f-ly, 2 ill.

Description

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31507469

It is possible to achieve equal lengths of the deformation cone along the stand; This naturally reduces axial forces acting on the strip. Reducing axial forces reduces the effect of dynamic forces on the driver, which increases the reliability of the mill. It also allows you to move the hinge of the rod to the roll from rolling

metal. You can roll on this mill with an increased number of turns, which increases the mill's productivity. The productivity of the mill also increases due to the possibility of moving the rod 7 along the lever 6, which reduces the labor costs for changeovers of the mill when moving to a different size of the workpiece. 3 hp f-ly, 5 ill.

The invention relates to rolling production, in particular, to step rolling mills, designed to produce billets of simple and shaped profiles with large cuts.

The purpose of the invention is to increase productivity and increase reliability by reducing the axial forces acting per lane.

FIG. 1 shows the camp, a general view; in fig. 2 — node I in FIG. 1 (screw connection of the lever with the rod); in fig. 3 shows section A-A in FIG. 2; in fig. 4 — node I in FIG. one

(compound using a slider and si

left cylinder); in fig. 5 is a section BB in FIG. four.

The rolling-forging mill consists of frame 1 mounted on frame 1 of a fixed rack 2. Rolling stand 3

mounted on the frame with the possibility of reciprocating movement along the rolling axis aa. In the cage 3 are located rolls 4 of variable radius. The cage 3 and the fixed stand 2 are interconnected by a pull 5 and a lever 6, hinged respectively on the stand 3 and the fixed

rack 2 ..

The rod 7, hinged on the roll 4, is connected by means of a hinge 8 on the lever 6 between the hinge

9 its fastenings to t ge 5 and hinge

10 fastening it to the fixed rack 2. In the first embodiment, the rod 7 is fixed on the rod 6 by means of a nut 11, a screw surface 12 made on the lever 6, and a collar 13 On the second version, the slider 14 is installed in the guides 15 of the lever 6 and connected to the power cylinder 16 mounted on the lever 6.

The camp works as follows.

A drive for reciprocating rolls (not shown) is included. The cage 3 begins to reciprocate along the frame 1. When the cage 3 is moved by means of the thrust rod 5, the lever 6 rotates on the hinge of the stand 2 and the rod

7 turns the rolls 4, which deform the strip 17. At the same time, the hinge

8 moves in the direction of the stand, which limits the rotation of the rolls 4. The position of the hinge 8 on the lever 6 changes. The cone of the deformation cone and the stand of the stand 3 are equal.

The achievement of this equality is judged by the movement of the rear end of the workpiece 17, which is determined by the measurement of the device of the meter (not shown) attached to the master device.

When moving to another size of the workpiece 17, the nut 11 is rotated, which, moving along the threaded surface 12 of the lever 6, moves the hinge 8 by means of the clamp 13 and changes its position on the lever 6 relative to the hinges 9 and 10. The hinge B can be moved along the lever 6 and when changing the stroke of the ram 16, as a result of which the slider 14 moves along the direction 15 of lever 6 and changes the position of the hinge 8.

The position of the hinge mounting rod on the lever to perform the condition of equality of the course of the stand during deformation is determined by the formula

1 J SlllLi4.li-lipJ-8j Jsi) lil§lics K1). -i

.

411

1 where k - bar length;

a is the distance between the hinge for fastening the lever to the rack; lever length;

1507469

5 shows the angle of the hinge attachment of the rod to the roll; L J ,, ,, is the length of the cone and

The length of the deformation cone is defined by - ercjf by the formula

.

 kA

.i + e sin 5c

The angle of rotation of the roll 5, defined by Yu-1CI, the beginning of the formation of a deformation cone is equal to

Da.zH °) 4e (

eight

n, k

arccos

where e is the radius of the roll axis.

The technical design of the mill has been developed. The mill contains rolls with a radius of curvature M, eccentricity mm. The distance between the roll axes is DQ 240 mm. Rod length g 132 mm, levers 1, 92 mm. The vertical projection of the distance from the hinge for fastening the lever to turning the roll to the stand is 40 mm, the distance from the axis of rotation of the roll to the hinge connecting the rod to the roller mm, the horizontal projection of the distance from the axis of rotation of the roller to the hinge connecting the lever to rack is 120 mm.

When rolling profiles with a height of 20 mm from blanks with a height of 40 mm, the distance from the hinge for fastening the lever on the stand to the hinge for fastening the rod on the stand is 1 38 mm. In that

In case the length of the deformation cone is L. 82.7 mm, the angle of rotation of the roll corresponding to the beginning of the formation of the deformation cone is 5 ° to 44.5 degrees. When rolling the same profile from a HO 60 workpiece, the indicated parameters are 1 53 mm, 113.2 mm; (63 degrees).

The mill is intended for use in the tooling and blanking production of a machine-building enterprise and is designed for 90 strokes / min. In the prototype, the maximum number of stand moves is 60.

This mill has the following advantages as compared with the known one: increased productivity by 1.5 times, increased reliability of the mill operation by reducing bearing wear, reducing wear on the thread of the driver screws.

10 Formula of invention

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thirty

five

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five

Claims (4)

1. A rolling-forging mill containing a fixed rack mounted on the frame, a stand mounted for movement along the rolling axis with at least two variable-radius rolls mounted in it, and a swing mechanism for each roll in the form of a non-movable stand connecting and the multilinker cage, which includes the bar, the puller and the lever, with the arm and the arm being pivotally connected to one end by themselves, and the other end also to be pivotally connected: the arm to the stand, and the arm to the stand, and rod at one end arnirno fixed to the roll, characterized in that, in order to increase the performance and enhance reliability by reducing the axial forces acting on the strip, rod and the other end is hinged on the lever between the hinge attaching it to the m and n stand. 2. Stan according to Clause 1, clause 1 and 2 with the fact that the hinge of the mounts of the roll bar to the lever is arranged so as to adjust its position along the lever. 3. Stan on PP. 1 and 2, of which the bar is fixed on the nut that forms a screw pair with the lever. 4. Stan on PP. 1 and 2, characterized in that the rod is fixed on a slider mounted on the lever and connected to the power cylinder mounted on the lever. Фа9.1 1507469 A- / t 6-6 Fi9.5