RU2225770C1 - Apparatus for metal continuous casting and deforming - Google Patents

Abstract

FIELD: metallurgy. SUBSTANCE: apparatus includes horizontal builtup mold having opening in upper portion; pair of lateral walls having portions inclined relative to horizontal axis and secured to support mounted on two drive eccentric mutually parallel vertical shafts. Supports of lateral walls are builtup ones; they have vertical mean parting plane normal relative to axial plane of eccentric shafts. EFFECT: enhanced dimensional and geometry accuracy of continuously cast billets, improved operational reliability of apparatus. 3 dwg

Description

The invention relates to metallurgy, namely to continuous casting with simultaneous deformation of the metal.

The prototype of the technical nature of the proposed is a device for continuous casting and deformation of metal (patent No. 2073586 RU). It includes a horizontal composite mold made with a hole in the upper part, a pair of horizontal side walls, each of which is made with sections inclined to the horizontal axis and mounted on a support mounted on two drive eccentric parallel vertical shafts, the upper and lower walls, each which of them are mounted on one of these shafts with the possibility of a phase-shifted reciprocating movement to a pair of side working walls.

The disadvantage of this device is the plastic deformation of the eccentric drive shafts of the paired lateral working walls, caused by tensile stresses arising in the elastically deforming caliper during rotation of the eccentric shafts in antiphase. This leads to a decrease in the reliability of the device as a whole, as well as to a change in the trajectory of the movement of paired side walls and, as a result, reduces the dimensional and geometric accuracy of the resulting blanks in particular.

The occurrence of tensile stresses in an elastically deformable support during rotation of the eccentric shafts is due to different relative displacements of the same points of the eccentrics of the drive shafts of the working side wall when they are simultaneously rotated 90 °.

The objective of the claimed device is to obtain blanks of a given assortment during continuous casting with simultaneous deformation of the metal.

In the process of solving this problem, a technical result is achieved, which consists in increasing the dimensional and geometric accuracy of continuously cast billets from wrought metal and increasing the reliability of the device for their manufacture.

The inventive device is characterized by essential features.

Restrictive:

A horizontal composite mold made with a hole in the upper part, a pair of side walls, each of which is made with sections inclined to the horizontal axis and mounted on a support mounted on two driven eccentric parallel vertical shafts, the lower and upper walls, each of which is mounted on one their specified shafts with the possibility of phase-shifted to a pair of side walls of the reciprocating motion.

Distinctive:

The calipers of the paired side walls are made integral with the vertical middle of the plane of the connector perpendicular to the axial plane of the eccentric shafts.

A causal relationship between the set of essential features and the technical results achieved is that the composite calipers of the pair side walls eliminate the plastic deformation of the eccentric drive shafts by compensating for tensile stresses arising in the caliper during rotation of the eccentric shafts that are in antiphase to the mutual plane-parallel movements of the composite caliper parts.

In Fig.1 shows a General view of the device, in Fig. 2 and 3 - the appearance of the caliper, where the numbers indicate the following positions:

1 - side walls;

2 - a support;

3 - drive eccentric shafts;

4 - bed walls;

5, 5 ’- the upper and lower walls;

6 - hinge system;

7 - clamping device;

8 - a flat ball bearing;

9 - an eccentric;

10 - clown;

11 - insert of low-conductivity material;

12 - the left part of the caliper;

13 - the right part of the caliper;

14 - overlay;

15 - screw;

16 - centering pins.

The device for continuous casting and deformation of the metal includes a water-cooled mold, consisting of four parts: two side walls 1, each of which is fixed in the caliper 2 and is driven by two drive eccentric shafts 3, rotating towards each other in bearings installed in the upper and lower walls 5, driven in a horizontal plane from one of the pairs of drive eccentric shafts 3 by means of a device 6, and tightly pressed against the side parts by pressure devices 7, mounted in the walls 4 of the bed through the device 8, which is a flat bearing with balls. The side walls 1 have inclined and straight sections. The top plate has a window for installing a pouring glass. The same window has the upper wall 4 of the bed. A pair of drive eccentric shafts 3 drives the upper and lower walls 5 through the hinge system 6. On the right side, the calipers 2 are mounted on the eccentric shafts 3 using a device that allows the support 2 to move relative to the axes of the shafts 3 along the sliding bearings. This scheme is quite widely used in articulated eccentric devices.

The operation of the device is as follows. During steady-state operation, liquid metal is poured through a pouring cup installed in the windows of the bed wall 4 and the upper wall 5 into a prefabricated mold, which forms a hopper, where metal crystallizes by heat removal by heat from the crystallizer walls and deformation of the solidified metal. When the drive eccentric shafts rotate, the side walls of the mold make complex movement towards each other in the horizontal plane along a closed path, characterized by the size of the eccentrics, their orientation relative to each other and the direction of rotation of the shafts in each side wall. This movement of the side walls contributes to the deformation of the crystallized metal and the alternate delivery of the workpiece. The upper and lower walls of the mold, associated only with the eccentric shafts, during the rotation of the shafts 3, perform reciprocating motion in the horizontal plane, contributing to the alternate advancement of the crystallized metal (self-feeding) of the workpiece exit. The movement of the upper and lower walls is carried out through eccentrics located on the extreme sections of the shafts 3 and rotated relative to the eccentric of the middle section, on which the support 1 is mounted, by 90 °. The bottom plate under the window also has an insert made of carbide material, for example, TiC, which prevents erosion of the plate.

The caliper 2 is made integral (figure 2) and includes two detachable parts 12 and 13 made with mating surfaces having a cross section of a self-centering spline connection (section AA).

These parts are centered by pins 16 and, with the help of the pads 14, are fixed with screws 15 from mutual vertical displacement. The horizontal relative movement of the caliper parts is controlled by displacement of the screw heads 15 in the oval holes of the plates 14. The operation of the composite caliper is as follows. When you turn the same points of the drive eccentric shafts, on which the relative horizontal movement of the 12 and 13 parts of the caliper, which causes the movement of the screw heads 15 in the oval holes of the plates 14. With a further turn of the same points of the drive eccentric shafts, the relative distance between them decreases, which leads to compression forces that lead to the inverse relative horizontal movement (convergence) of the caliper parts to their original position. Further cycles are repeated.

Claims (1)

A device for continuous casting and deformation of metal, containing a horizontal composite mold with a hole in the upper part, a pair of side walls, each of which is made with sections inclined to the horizontal axis and mounted on a support mounted on two drive eccentric parallel vertical shafts, lower and upper walls , each of which is mounted on one of these shafts with the possibility of a phase-shifted reciprocating movement to a pair of side walls, characterized in that the support you working side walls operate components with vertical median plane of the connector perpendicular to the axial plane of the eccentric shafts.

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