SU1533824A1 - Method and apparatus for continuous casting of hollow billets cut to length - Google Patents

Abstract

The invention relates to metallurgy, and more specifically to continuous casting of hollow dimensional blanks. The purpose of the invention is to improve the quality of the blanks and the stability of the casting process. The method of continuous casting hollow-dimensional workpieces involves introducing a seed into the mold, feeding the metal into the gap between the mold and the core with a sandy coating, forming the workpiece in the mold with simultaneous impact on the surface of the forming workpiece of transverse oscillations, and after the seed leaves the mold, the workpiece is affected only by longitudinal vibrations mi A device for implementing the method of continuous casting hollow-dimensional workpieces includes a mold 1, a seed mounted on a movable plate 3, a sand-coated rod, a vibrator 5 placed on the lateral surface of the mold at the bottom end can be rotated around a horizontal axis at an angle of 90 ° and equipped with a gear a wheel connected to a toothed rack 7 mounted vertically on a movable plate, separating flanges 8. 2 sec. f-ly, 4 ill.

Description

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The invention relates to metallurgy, and more specifically to continuous casting of hollow dimensional blanks.

The aim of the invention is to improve the quality of the blanks and the stability of the casting process.

The method is carried out as follows.

The seed is introduced into the mold, the liquid metal is poured into the gap between the mold and the sand-coated rod coaxially mounted, the preform is formed in the mold

with the simultaneous impact of the transverse surface of the workpieces, which show new fluctuations on the surface of the forming workpiece, and after the seed leaves the crystallizer, the workpiece is affected only by longitudinal vibrations.

Figure 1 shows the device before starting work, a general view; figure 2 is the same, after the release of the seed from the mold; on fig.Z and 4 - the same, side view.

The device contains a mold 1, the seed 2 mounted on the movable plate 3, the core 4 with a sandy coating, the vibrator 5, the gear wheel 6, the toothed rack 7 mounted on the movable plate 3, separation flanges 8.

The device works as follows.

At the beginning of pouring the molten metal into the gap between the mold 1 and the core 4, the vibrator 5 acts on the crust of the workpiece with transverse (perpendicular to the axis of extrusion) vibrations. When the seed 2 leaves the crystallizer, the gear-rack mechanism rotates the vibrator 5 by 90 ° and, in this position, the vibrator acts on the workpiece with longitudinal (along the extrusion axis) vibrations).

The use of the method and device eliminates the destruction of sand-coated rods and thin flanges for separating continuously cast billets into dimensional parts, since thin flanges of the rods are located during transverse vibrations.

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Improves process stability and quality blanks.

Claims (2)

Invention Formula . 1. Method for continuous casting of hollow-dimensional workpieces, including inserting a seed into the mold, feeding metal into the gap between the mold and the mandrel, forming the workpiece with simultaneous effect on the workpiece oscillations and stretching the workpiece, characterized in that in order to improve the quality of the workpieces and process stability pour, before the seed emerges from the crystallizer, oscillations are applied perpendicular to the drawing axis on the surface of the formed workpiece; after the seed emerges from the crystallizer, oscillations impose a longitudinal axis of extrusion. . 2. Device for continuous casting hollow-dimensional workpieces containing a mold, a seed mounted on a movable plate, a mandrel and a vibrator, characterized in that, in order to improve the quality of the workpieces and the stability of the casting process, it is equipped with a toothed wheel and a vertical gear mounted on the movable plate rail, the vibrator is installed on the lateral surface of the mold and its lower end can be rotated around the horizontal axis at an angle of 90 through a gear, and as the mandrel use suture rod. above the crystallizer and are not destroyed. The change of vibrations from transverse to longitudinal is carried out after the seed leaves the crystallizer and the effect of such vibrations on the thin flange during its stay in the crystallizer does not lead to its destruction. Thus, the friction of the workpiece with the crystallizer is reduced, the stretching force of the workpiece is reduced, and the scoring is eliminated. five 0 five 0 five 0 Improves process stability and quality blanks. Invention Formula . 1. Method for continuous casting of hollow-dimensional workpieces, including inserting a seed into the mold, feeding metal into the gap between the mold and the mandrel, forming the workpiece with simultaneous effect on the workpiece oscillations and stretching the workpiece, characterized in that in order to improve the quality of the workpieces and process stability pour, before the seed emerges from the crystallizer, oscillations are applied perpendicular to the drawing axis on the surface of the formed workpiece; after the seed emerges from the crystallizer, oscillations impose a longitudinal axis of extrusion. ., 2. A device for continuous casting of hollow-dimensional workpieces containing a mold, a seed mounted on a moving plate, a mandrel and a vibrator, characterized in that, in order to improve the quality of the workpieces and the stability of the casting process, it is equipped with a toothed wheel and a vertical toothed rack mounted on the moving plate, the vibrator is installed on the lateral surface of the mold and its lower end can be rotated around the horizontal axis at an angle of 90 by means of a gear wheel, and as a mandrel, use aemy rod. g-} FIG. 2 Fig.Z Editor V. Bugrenkova Fig Compiled by V. Yakovlev Tehred M. Khodanich Proofreader M. Kucher va Order 10 Circulation 629 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 1533824 Fig Subscription