SU761131A1 - Casting line to lined moulds - Google Patents

Description

The invention relates to foundry, in particular to a method for producing precision billets by casting into lined chill molds.

Known line casting lined chill molds; [1].

The disadvantage of this line is the lack of accumulators of sufficient capacity, especially in front of the pouring unit. The use of inter-aggregate conveyors as storage devices is limited, as the length of the line increases dramatically. In addition, the long-term stay of the molds in the storage unit violates the stability of thermal parameters, which, in turn, leads to a decrease in geometric accuracy and a violation of the stability of the physicomechanical properties of the castings.

A known casting line, which has a drive before pouring, is made in the form of technological conveyors combined with heating devices connecting the assembly unit with the pouring unit and the pouring unit with the disassembly unit [2].

However, the drive cannot be used to store backup chill molds and

periodic (as required) their

input into the work, as well as for periodic input into it of the chills of one name and output of the chills of another name.

Also known line designed for casting chill molds, consisting of the lower 5 half and cover, equipped with an additional transport branch connecting the transfer mechanisms of chill molds from the longitudinal branch to the transverse directly with the assembly unit [3].

10 The branch is intended for transporting only the lids of the molds and cannot be used as a storage of collected chill molds with their subsequent issuance for pouring.

15 Also known is a line that has a storage of half-molds before they are fed to a carousel for applying obliteration. The drive is installed outside the main process stream and is connected to it.

20 gears [4].

However, this line has the same drawbacks as the ones described above, since the drive does not ensure the accumulation of the collected chill molds, nor does it compensate25. He cuts down on waiting for the fill.

In the practice of foundry, in some cases it is necessary to pour molds of different grades moving in the same process flow. None of

30 known, including those described above li3

This does not provide such an opportunity, since for the stability of the technical process, chills are to be poured in groups whose size corresponds to the melting capacity or, at least, the capacity of the transfer bucket.

The purpose of the invention is the creation of high-performance lines, free from the disadvantages of the known lines.

The goal is achieved by the fact that in the casting line into lined molds, containing aggregates for applying cladding to chill molds, assembling, pouring, disassembling, knocking out, inter-assembly conveyors and a drive installed outside the main process flow with transmission mechanisms, the latter connect the drive to the conveyor for transferring the assembled chill molds from the assembly unit to the pouring unit, on the one hand, and with the conveyor of transfer of the collected filled molds to the disassembly unit, on the other hand.

The drive can be equipped with a heating device and can be made in the form of conveyors, which, like the transmission mechanisms, it is advisable to perform reversible.

FIG. 1 shows the proposed line, plan view; in fig. 2 - option of the vertically closed drive, side view; in fig. 3 - diagrams of various options for filling the drive with the chill molds and their subsequent issuance from it.

The line includes a unit for applying lining onto chill molds, unit 2 assemblies, unit 3 pouring, unit 4 disassembling, unit 5 knocking out, unit 6 cleaning chill molds from spent facing, unit 7 cooling. The line units are interconnected by conveyors 8-13 and transmitting mechanisms 14 and 15. In the present invention, conveyors 8-13 are made in the form of drive roller tables. A conveyor heating device 16 is installed on the conveyor 10. Parallel to the main process flow of the collected chill molds, a drive 17 of the assembled chill molds is installed, which includes reversible conveyors, for example, drive roller tables 18, a pass-through heating device 19 and reverse gears 20 and 21. A mechanism 20 connects the accumulator 17 to the conveyor 9 transferring the collected molds 22 from the assembly 2 to the assembly 3, and the mechanism 21 connects the drive 17 to the conveyor 10 for transferring the filled-in die molds 23 from the unit 3 fill to the unit 4 disassembly. On the conveyors 9 and 10 directly at the gears 20 and 21 installed managed stops 24 and 25 of the mold, and on the roller table 18 - hard stops 26 and 27.

In the variant of the accumulator (Fig. 2), the transmission mechanisms 20 and 21 are made in VI

de lifting tables with drive reversi in Nm and r ol ι> g and n g and m and.

The line works as follows. After applying the claddings in unit 1, halves of the chill molds are transferred to assembly unit 2 by conveyor 8, where they are assembled into chill mold 22. After assembly, the chill mold 22 is conveyed to conveyor 9 to aggregate position 3, where it is poured with liquid metal. Pour the collected chill molds 23 are transferred to the conveyor 10, during the movement along which the solidification of the casting takes place. During movement along the conveyor 10, the chill molds 23 pass through a heating device 16, simultaneously performing the functions of a shelter localizing harmful and thermal excretions. Next, the chill mold 23 through the mechanism 14 and the conveyor 11 is transmitted to the unit 4 disassembly. After disassembly in unit 4, semi-chills are successively passed through knockout unit 5, where the casting, mechanism 15, conveyor 12, cleaning unit 6 from the treated facing and unit 7, where cooled, if necessary, are removed to the temperature required for subsequent lining application. Next, half-squares along the conveyor 13 are transferred to the unit 1 applying the lining.

The described scheme corresponds to the cyclical operation of the line without downtime in anticipation of the fill.

In the case of downtime and waiting for pouring, the stop 24 (Figs. 1 and 2) and lined molds 22 are loaded with the aid of the transmission mechanism 20 into the accumulator 17. During particularly prolonged downtimes, as well as in the case of the end of operation, the chill mold 22 also fills the heating device 16 (see FIG. ZA, b). Since the accumulator 17 is provided with a heating device 19, the chill molds 22 stored in the accumulator 17 retain their temperature, which fully meets the requirements of the technical process. Also keep the temperature and chill molds that are in the heating device 16. The total length of the heating devices 16 and 19 is chosen so that they can accommodate the entire set of assembled chills, simultaneously used on the line. Filling the drive 17 at the end of the work can be done with the help of the mechanism 21. In this case, the stop 25 is turned on, and the roller tables 18 are reversed (see Fig. 3c).

In the case of the resumption of the pouring, the chills 17 of the accumulator 17 17 by the roller table 18 are transferred to the stop 26, and then by the mechanism 20 to the conveyor 10. The stop 24 is open. If in the accumulator 17 and in the heating device 16 a full set of lined molds was stored, then the chills in the device 16 are stored 22

the covered stop 25 is transferred by the mechanism 21 to the accumulator 17, and then, after the chills that were previously in the accumulator 17, are transferred to the conveyor 10 and to the pouring. At the end of the unloading of the device 16, the stop 25 opens (see Fig. 3 g, d).

In the case of storage in the accumulator 17 and the heating device 16 of the unlined assembled chill molds, the latter have the temperature necessary for the application of the lining to them, and must be fed to the lining application unit 1 when the line resumes operation. The extraction of chill molds from the accumulator 17 can be carried out both with the help of the mechanism 21 and with the help of the mechanism 20, according to the patterns of movement shown in FIG. 3 f, g.

If necessary, pouring of chill molds with different grades of metal, chills of one of the names are fed to the pouring position, while the chills of the second name are transferred to the accumulator 17 in accordance with the movement pattern shown in FIG. 3 b, c. At the end of the casting of a batch of molds of the same name, the batch of molds of the second name being in the accumulator 17 is transferred to the fill position in accordance with the movement pattern shown in FIG. 3 g or 3 g.

Thus, the implementation of the invention allows to expand technological capabilities and increase the utilization rate of casting lines in lined chill molds, to ensure high-quality castings with stable properties and sizes and an increase in line productivity by 15–20%, which corresponds to an annual economic effect of 80–100 thousand rubles. from the operation of one line with an average metal capacity of chill mold 100 kg

7611P

6

Claims (2)

Claim 1. Casting line in lined chill molds, containing aggregates for applying chill molds onto chill molds, their assembling, pouring, disassembling, knocking, inter-unit transport, and a drive installed outside the main three-logical flow with different gear mechanisms By the fact that, in order to ensure the filling of two types of metal of different grades of metal moving in a single process flow and increasing productivity, the drive is connected by transfer mechanisms 15 to the transfer conveyor of the collected molds from the assembly unit to the pouring unit, on the one hand, and the transfer conveyor poured collected molds from the casting unit to the unit 20 disassembly - on the other hand. 2. Line on π. 1, characterized in that the drive is equipped with heating devices to maintain the set temperature of the collected chill molds. 25 3. Line on π. 1, different the fact that the drive is made in the form of conveyors, for example, drive roller conveyors, while the conveyors and transmission mechanisms of the drive are reversible.