SU535356A2 - Vacuum Melting Furnace - Google Patents

Description

one

By bus. St. No. 423849 is a well-known vacuum melting furnace, which consists of a melting chamber, a loading chamber and a mold chamber. A melting crucible with an axis of rotation and a crucible tilt mechanism are installed in the melting chamber, having flexible connections, one ends of which are fixed on the sides of the crucible at equal distances from the axis of its rotation and the others on the body of the melting chamber. In such a furnace, the melting chamber has a large volume due to the idling of the carriage of the crucibles - from the neutral position of the crucible to its inclination at an angle corresponding to the beginning of the discharge. In addition, it is impossible to control the trajectory of the jet of liquid metal poured from the crucible, which is summed up from two interconnected movements of the drain tip of the crucible - horizontal translational movement together with the crucible carriage and simultaneous rotational movement around the axis of rotation of the crucible; and it is also impossible to conduct open smelting and casting of metal without significantly complicating the design of the furnace and increasing the size of the crucible carriage and melting chamber.

In order to improve the efficiency of the vacuum furnace, an additional segment, fixed to the axis connected to the rotary drive, is installed in the movable part of its melting chamber, whose radius is equal to the radius of the crucible rotation segment, the segments being interconnected by flexible links, and the crucible carts

one from another at a distance greater than the rollback distance of the movable part of the melting chamber by an amount equal to the diameter of the roller. FIG. 1 shows the proposed oven,

side view; in fig. 2 shows a section along A-A in FIG. one; in fig. Figure 3 shows the furnace in operation with open smelting.

The vacuum melting furnace contains a loading chamber 1 and a melting chamber consisting of a fixed part 2 and a movable part 3, which rolls back on the carriage 4. Inside the melting chamber there is a carriage 5 on which the melting

crucible 6 having an axis of rotation 7 and a drain toe 8. Cart 5 moves progressively on rollers 9 by passing screw-nut 10 and drive 11 along rails 12. On the sides of the crucible there are two segments 13, on which flexible links 14 are fixed. the ends of the flexible connections are fixed on additional segments 15 of the same radius as the segments 13, located in the movable part 3 and having a common axis 16, connected

driven rotation 17.

. The metal from the crucible is poured into a mold 18 located in the chamber 19. The chamber 19 and the melting chamber are cut off from each other by the shutter 20.

Works vacuum melting furnace as follows.

The mixture enters the melting crucible 6 when the shutter 21 is opened from the loading chamber 1. After the charge is melted in the crucible, the liquid metal is poured into the mold 18 when the shutter is open 20. To drain the metal, turn on the actuator 17, and the segments 15 turn Fig. 14, segments 13 and axis 7 of the crucible are also rotated by 45 °, corresponding to the start of the drain. After that, the drive AND is turned on, the carriage 5 moves X to the distance - corresponding to

turning the crucible another 45 ° until the end of the drain, while the actuator 17 is turned on in the forward or reverse direction to correct the trajectory of the metal jets. As a result, the sock of the 8 crucible describes the trajectory B, while the spread of the metal jet can be reduced to zero.

When conducting open smelting, the vacuum melting furnace works as follows.

The movable part 3 of the melting chamber rolls back on the carriage 4 to the distance i, while the carriage 5 rests with its rollers on the left side on the rails 12 located in the fixed part and on the right side on the rails 12 located in the movable part of the melting chamber. The distance between the rollers 9 k ii + d.

The shop crane loads the charge into the crucible. After melting, the crucible is tilted by a drive 17 and the metal is drained into the process tank 22.

The implementation of the movable part of the melting chamber with the axis connected to the rotational drive installed in it, on which two guides of the same radius as on the crucible are fixed, fixing the second end of the flexible links on these guides, and also making the distance between the rollers the crucible carriage is greater than the rollback of the movable part of the melting chamber by an amount equal to the diameter of the roller (/ i / 24-), which reduces the crucible carriage stroke by 90 ° when it is tilted by 90 ° when the metal is drained into the mold, shorten the length of the melting chamber well, investigator2g

but, reduce its pumping time. In addition, it gives the opportunity to adjust the trajectory of the drain tip of the crucible and reduce the spread of the jet of the metal being poured to zero, thus increasing the accuracy of the metal entering the mold, i.e., the reliability of operation increases. It is possible to conduct open smelting and metal drainage without additional complications of the furnace design.

Claims (1)

Invention Formula Vacuum melting furnace according to ed. St. No. 423849, characterized in that, in order to increase its working capacity, it equipped with an additional segment installed in the movable part of the melting chamber and fixed on the axis connected to the rotational drive, the radius of which is equal to the radius of the crucible rotation segment, the segments being interconnected using flexible connections, and the crucible carts rollers are set apart from each other by distance , greater than the rollback distance of the movable part of the melting chamber, by an amount equal to the diameter of the roller. HoHpi c / uSa / 7 / " 12