SU865500A1 - Plant for continuous casting of hollow billets - Google Patents

Description

v54) INSTALLATION OF CONTINUOUS HOSE CASTING PLAIN

I

The invention relates to metallurgy, koHKpeTHO to the pre-casting of metals and alloys.

. A device for continuous casting of hLer length is known, in which special separating washers are provided with a hole in the middle part, which are periodically introduced into the liquid metal located in the crystallizer fl.

However, this device cannot be used to produce hollow billets, the insertion of washers under the jet causes splashing of the metal, and it does not guarantee the production of billets of a given length.

The closest to the present invention is a device for continuous casting of shaped articles, performed in the form of a mandrel, on which, through one, the disks and a pin are fitted, separating the molded parts and forming their internal cavity. The mandrel is set between the rolls of the mold-

SIZE box

mi .and when it is immersed in a bath of liquid metal, a corresponding casting 2 is formed around it.

However, when using a known device, the possibility of additional feed during the process of solidification of the casting is excluded, and therefore, shrinkage compensation cannot be ensured and the casting density is necessary.

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The purpose of the invention is to obtain high-quality hollow billets of measured length.

The goal is achieved by the fact that in an installation for continuous casting of hollow blanks containing a mandrel,

Claims (3)

IS assembled from prefabricated elements and installed in a continuous mold, guiding and casting devices, assemble the mandrel elements made with flanges whose thickness is O, 2-2.0 thickness of the casting, completely overlapping the cross-section of the crystallizer, each flange having one or several symmetrically arranged slots made to a depth of 0.2 to 1.0 of the casting thickness, and the cross section of each slot is .1.0-5, O of the sections of the metal jet fed into the mold cavity. In addition, one or several were made on the outer side of each flange (Symmetrically positioned vertical grooves, with a depth of 0.1-0.5, the casting thickness, and in the flanges, through vertical holes, the axes of which are located at a distance of 0.5-0 , 75 is from the outer surface of the flange to the outer surface of the mandrel, with the diameter of the holes equal to O, 2-O, 5 of the casting thickness .In Fig. 1 shows the installation, a general view, in section, Fig. 2 - the same top view; in Fig. 3 - section A-A in Fig. 2. The installation includes a mandrel 1 consisting of an element ntov 2 with flanges, which are inserted into the mold 3 for shaping the cavity of the casting, 4, the refueling 5, on which the mandrel is fixed, the guide b and rolls 7 for pulling the workpiece. liquid metal when filling the cavity 9 of the crystallizer 3, the groove 10 for bonding the castings to each other, and from version 11 to feeding the underlying castings with the liquid metal. Each element 1gc 2 has a protrusion 12 at one end, and a depression 13 at the opposite end for assembling the mandrel. The device operates as follows. Filling 5 is introduced into the cavity of the crystallizer 3 at the level of its upper end or 5O-10O mm lower. The assembled mandrel 1 or the assembled block of elements 2 or a separate element 2 are mounted on the gas station P, connecting them through the protrusion 12 and the vapina 13. The assembly of the elements 2 and their installation in K15 and the analyzer 3 are carried out in such a way that -i c with; metal piles from the casting device 14. The seed 5 with the mandrel 1 is moved down by 0.2-0, 5 (the height of the crystallizer and through the casting device o 14 feeds the metal into the working cavity 9 of the crystallizer 3. After solidification of the metal on the seed begin the process of removing 4. 04 In the course of drawing, the flanges of the elements 2 after / juvenously overlap the cavity 9 of the mold 3 and solidify castings 4 are separated. At the exit of the crystallizer 3, the castings 4 are easily separated by a percussion device. supplying the metal to the cavity of the mold, makes it possible to obtain dimensional workpieces in any slip through mold without creating an intermediate bath of liquid metal. In addition, these slots contribute to the consistent directional solidification of each from the pouring, connecting them to each other. Cuts for metal supply and the hole through which the hardening underlying castings are fed. They prevent the occurrence of shrink holes and porosity in castings, which significantly improves their quality. Claim 1. An installation for continuous casting of hollow blanks, containing a mandrel assembled from prefabricated elements and installed in the through mold of the mold, a guide and casting device, characterized in that, in order to obtain high-quality hollow blanks of measuring length, the assembled elements of the mandrel are filled with flanges, whose thickness is 0, 22, 0 thickness of the casting, completely overlapping the cross-section of the mold, each flange has one or more lneinss a depth O, 2-1 O casting thickness, and the cross section of each slot is 1, G-5, G-sections of the metal stream introduced into the mold cavity. 2. The installation according to claim 1, so that, in order to ensure the bond between the castings during the stretching process, one or more vertical holes are made symmetrically on each side of each flange, or , 1-0.5 thickness of casting. 3. Installation according to claim 1, so that in order to supply the solidified castings with liquid metal, the flanges have through vertical holes, the axes of which are located at a distance O, 5-O, 75 distance from the outside