SU1650336A1 - Vertical continuous casting machine - Google Patents

Abstract

The invention relates to metallurgy, specifically to the continuous casting of blanks in molds with moving walls. The goal is to expand the technological capabilities of the machine by casting shaped castings and increasing its productivity. The machine contains a composite movable crystallizer, the movable walls of which consist of separate half-molds mounted on fingers attached to two pulling chain drives with the possibility of rotation around them and aligning them in a mold, the half-molds having side cavities for casting fittings cavity for casting the assortment of blanks. 3 hp f-ly, 9 ill.

Description

The invention relates to the field of metallurgy, and more specifically to the continuous casting of blanks in molds with moving walls.

The purpose of the invention is to expand the technological capabilities of the machine by casting shaped castings and improving its productivity.

Figure 1 shows the machine, a general view; figure 2 - section aa in figure 1; fig.Z - different half-form; figure 4 - fastening the half-form to the traction chain and the connection of the cuffs with the chamfer; figure 5 is a view of B in figure 4; figure 6 - tube; in fig. 7 - interaction of half-molds with an emphasis; in fig. 8-installation rods; in fig. 9 - casting of blanks of variable cross-section of shafts, gear shaft.

The vertical machine with movable walls for continuous casting of the blanks contains two closed lines 1. Each line consists of two traction chain branches mounted on two pairs of sprockets 2 fixed on the upper and lower axles, which by means of bearings 3 are fixed on horizontal racks 4 .

These horizontal posts are bolted to the four vertical posts on which frame 5 rests.

The lines are moved with the help of a 6m electric motor of a two-stage worm gearbox 7, which rotates the lower axis of the line.

Separate half molds 8 are rotatably mounted between two traction chain drives of each line on fingers attached to them.

Each half-form is equipped with four fingers 9, which limit the rotation of the half-form in the opening position only by 30-40 °, while they abut against the chain.

The individual molds are combined into a form with the help of conical fingers 10 and holes, and are pressed against the sliding supports 11c on the back side of the chain. Aligning with tapered fingers and holes moves the second line from the motor.

The half-molds have a vertical cavity for casting blanks of the assortment and associated with it by sprues 12 lateral along &

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cavities 13 for casting shaped blanks (body parts and gears). The subsequent shape is aligned with the previous cuff 14 with the outer face at the end, and the subsequent shape has an inner face 15 with a large angle. The height of the cuff provides plane-parallel movement of the half-form relative to the casting through the fingers 16, which interact with two side stops 17, having the form of an arc of an asterisk line. Molds are cooled by external watering with cold water from pipelines 18 both in the casting zone and in the free zone, in the external and internal cavities of the half-molds.

The metal receiver 19 is mounted on the frame 5, and the metal pipe 20 is lowered into a vertical mold cavity to a depth greater than the height of the mold so that the subsequent shape is fully aligned. In order to accurately install the metal pipe in the mold cavity, it is necessary either to install the metal receiver or to move the axes of the line along the horizontal posts 4. The pouring of the liquid metal and the emergency closing are performed by stopper 21 using an electromagnetic device 22.

At the end of the metal conduit, a wear-resistant refractory outer ring 23 made of chromium or metal carbides is installed.

In the opening position of the semiforms, the sprues are cut using two semicircular knives 24 mounted on a ring stand 25 moving on the pipe 26 using two hydraulic cylinders 27. In the opening position, when the half-molds are 25 mm thick, they interact with the electric sensor 28 controlling spools hydraulic cylinders 27.

The operation of the machine is as follows

At the beginning of casting, a plug 29 of fire-resistant material, chamotte, is inserted into the lower mold so that it rests against rack 25. A signal is then sent to the electromagnetic device 22, which opens the plug 21 of the metal conductor 20 and the liquid metal enters the central and side cortical 13 chill molds. After the time when all forms are filled with metal and in the lower forms the metal crystallizes, the refractory stopper 29 is knocked out and the electric motor 6 is turned on to move the line 1 with the half-molds. The lower half-forms 8, interacting with the fingers 16 with the side stops 17, make a plane-parallel movement, while the lower half-forms 8 are slightly raised relative to the upper half-form, but due to the cuffs 14

do not interact with them. In order to prevent deformation of the castings about the mold half 8, when the latter are separated by a distance of 25 mm, it interacts with an electric sensor 28, which turns on the spools of hydraulic cylinders 27, and half-round knives 24 cut sprues 12. The electric sensor 28 jumps off the half-mold 8 and turns on the return of hydraulic cylinders 27 with knives 24.

0 A piece of the blanks of the gauge is produced by a circular saw 30. The gates 12 are made with a curved L-shape. In the process of unloading with the displacement of molds and castings of body parts relative to

5 assortment workpieces, the L-shaped sprues gradually move into the gap and bend, providing for displacement of the half-molds. To increase the durability of semi-molds, their working surfaces can be painted with thermo-resistant paint.

In order to increase the range of the cast billets, pairs of half-molds that are different from each other are installed.

For casting blanks with cavities

5 inside the mold half are provided with grippers 31 for rods 32.

For casting bodies of rotation — shafts, gear shafts, etc., which have a variable cross section; the metal conduit at the end is provided with

0 two electric sensors 33 of tungsten wire. When a liquid metal is supplied, the current through the lower sensor and the liquid metal closes the circuit of the electromagnetic device (Fig. 9) and with a plug adjusts the average metal consumption. When the level of the liquid metal reaches the upper sensor, the second circuit of the electromagnetic device closes and the plug closes the metal conduit.

0 For blanks of long shafts, you can use two or more forms in sequence.

The use of the proposed machine for continuous casting of billets makes it possible to cast both the assortment type blanks and the case type of body parts and gear wheels.

In addition, the proposed machine occupies a small productive area.

The formulas of the invention 1. A machine for vertical continuous casting of billets comprising a filling device with metal wire, a movable composite mold in the form of two closed lines of separate half-molds with their movement drives, a seed mounted on a ring stand, and a device for dividing the cast ingot into billets, at the same time

The molds are made through cavities with the formation of a vertical channel when they are closed with each other, characterized in that, in order to expand the technological capabilities of the machine by casting shaped castings and increasing its productivity, the metal conduit is buried in a vertical channel for a distance not less than the half-form height, and in the half-molds, there are additionally made side cavities interconnected by L-shaped gating channels with through cavities, wherein each half-form is made with the possibility of connecting with the previous one in vertical plane through a cuff with a side slope and an inclined chamfer on its opposite ends and is mounted with the possibility of plane-parallel movement when opening the half-form, and

the division of the cast ingot into blanks is made in the form of two semi-circular knives installed with the possibility of vertical movement on the ring stand and the circular saw located under them.

2. A machine in accordance with claim 1, wherein each pair of half-molds has different lateral cavities in shape.

3. The machine according to claim 1, in which, in order to ensure the casting of hollow articles, the mold halves are capable of gripping the mandrels,

4. The machine according to claim 1, characterized in that, in order to provide the casting of the bodies of rotation, it is equipped with metal level sensors mounted on the lower end of the metal conductor with a different depth in the cavity of the vertical channel.

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Claims (4)

Claim 1. A machine for vertical continuous casting of billets, comprising a casting device with a metal wire, a movable composite mold in the form of two closed lines of individual half-molds with the disabilities of their movement, a seed set on an annular rack, and a device for separating the cast ingot into billets, while in the half-molds through cavities are made with the formation of a vertical channel when they are interconnected, characterized in that, in order to expand the technological capabilities of the machine by casting x castings and increase its productivity, the metal wire is buried in the vertical channel at a distance of not less than the height of the half-mold, and the side cavities are additionally made in the half-molds, communicated by L-shaped gate channels with through cavities, each half-mold made with the possibility of connection with the previous one in the vertical plane by means of a cuff with a lateral slope and an inclined chamfer at its opposite ends and is installed with the possibility of plane-parallel movement when the half-forms are opened, and the device In order to separate the cast ingot into billets, it is made in the form of two semicircular knives and a circular saw located below them installed with the possibility of vertical movement on the annular rack. 2. The machine according to claim 1, characterized in that each pair of half-forms has different lateral cavities in shape. 3. The machine according to claim 1, on the basis of the fact that, in order to ensure the casting of hollow products, the half-molds are made with the possibility of gripping the mandrels, 4. The machine according to claim 1, with the fact that, in order to ensure casting of bodies of revolution, it is equipped with metal level sensors mounted on the lower end of the metal wire with a different depth of penetration into the vertical cavity channel. A Figure 1 with a * Figure 5 FIG. FIG. 6