SU1370409A1 - Heat treatment set - Google Patents

Abstract

The invention relates to metallopetes equipment, in particular, industrial furnaces for heat treatment of blanks. The purpose of the invention is to increase the productivity and quality of heat treatment of blanks. The unit consists of a furnace 1 with a rotating hearth 2, a loading-unloading mechanism 9 with a grip, hardening) 1 m tank, a table for loading and unloading blanks. The goal is achieved by placing heaters 7 in the loading-unloading chamber 5 of the furnace 1 and making the camera capable of moving along the stem 6 of the lifting table 3 at its lower position. The loading-unloading mechanism 9 is installed between the furnace 1 and the loading-unloading table with the possibility of placing the grippers above the lifting table 3 of the furnace in its lower position, quenching tank and loading-unloading table. 2 Il. with (L

Description

Tgg

SAE

About 4

ABOUT

:about

1; 1G) retention refers to metallurgical equipment, in particular to npoMiiiuijienHbiM furnaces for heat treatment of blanks.

The aim of the invention is to increase the productivity and quality of heat treatment.

FIG. 1 shows a heat treatment unit, plan view; in fig. 2 shows section A-A in FIG. one.

The heat treatment unit consists of a rotary hearth furnace 1, a lifting table 3 made in the form of a lined cork, a vacuum gate 4, a lock chamber or a loading / unloading chamber 5 in which the lifting table rod 6 moves and the heaters 7 are installed, and the drive 8 vertical movement of the sluice chamber.

In addition to the furnace, the unit contains a mechanism 9 for loading and unloading blanks, a quenching tank 10, and a table 11 for issuing the finished billet and receiving a new one.

The unit works as follows.

The mechanism 9 transports the workpiece 12 from the table 11 to the open sluice chamber 5. The workpiece 12 is installed or lifting CTO: I 3, located on the rod 6. Then the sluice chamber 5 is closed by the drive 8. The evacuation starts and the heaters 7 are simultaneously turned on. After evacuation and heating of the workpiece 12 to the required temperature, the shutter 4 opens and the rod b lifts the plug 3 with the blank 12. The plug 3 enters the corresponding hole in the ram1, the bottom 2 and the heating of the blank 12 begins in the chamber. Table-stopper 3 is fixed in the hearth 2 (clamps not shown). Rod 6 is lowered. Under 2 rotates on definition: 1en angular pitch. Then the rod 6 rises and the table-stopper 3 is released from the hearth 2.

The rod 6 lowers the cork table 3 with the workpiece 12 into the lock chamber 5. The vacuum shutter closes. Air is introduced into the lock chamber and the required temperature of the workpiece 12 is maintained by means of a heater 7.

After the air inlet, the lock chamber 5 is lowered (opened)

0

five

0

five

0

five

0

five

0

five

drive 8. Mechanism 9 captures the workpiece 12, immediately turns to the quenching tank 10 (not producing a reduction in the arm's length of the mechanism) and, not releasing the workpiece, lowers it into the quenching tank 10. At the end of the quenching, mechanism 9 transports the workpiece 12 to the table 11.

With the preform, the process is repeated.

The presence of a lock chamber with heaters makes it possible to reduce the heat losses associated with placing the workpiece in the heating chamber at pos. No. 1 (Fig. 1). Heated blank placed on pos. 1, has less effect on the uneven temperature of the billet at the last position (for example, in FIG. 1, pos. 9). When a heated billet is placed in a lock chamber, air is let in, which will be accompanied by cooling the billet if the workpiece is not heated in a lock chamber. By the time the sluice chamber is opened, the billet has the temperature required for quenching. Now heat losses, which are unavoidable during transportation to the quenching tank, are minimal, since the shape of the sluice chamber makes it possible to reduce the path, and consequently, the time for transferring the workpiece.

The proposed design of a vacuum furnace allows heating in vacuum with a minimum residence time of the heated billet in an air atmosphere and short-term transportation of the billet to the quenching tank, which makes it possible to increase the productivity of the unit and also improve the quality of the billet by reducing heat loss during sluicing and billet transportation.

Claims (1)

Invention Formula A heat treatment unit containing a vacuum heating furnace with a rotating hearth and a vacuum shutter, a lock chamber located below the heating furnace with a table that can be moved vertically, so that it is equipped with a loading / unloading table to increase productivity , quenching table and loading-unloading mechanism made with the possibility of verticals equipped with heaters. ; / F // g. ;