SU330788A1 - Heating furnace with stepping hearth - Google Patents

Description

The invention relates to heating installations intended for heating metal prior to pressure treatment.

Known heating furnaces with walking hearth, containing fixed support beams and located between them with the possibility of reciprocating movement in the longitudinal direction of the movable beam, equipped with a drive.

Such mechanisms are widely used in forge shops, mainly for the mechanization of plasma and electric furnaces. The mechanization of induction plants is hindered by the need to introduce intermediate supports, especially with a significant inductor length and a large beam weight.

Since these supports are introduced by the coils of the inductor coil, the step size must be taken to be minimal and in order to remove the workpiece from the working chamber of the inductor, a large number of steps have to be taken, and this in turn leads to the fact that the workpiece, gradually creeping out of the inductor, stops heating its magnetic field, but continues to cool intensively, giving off heat to the walking beam and into the environment.

In order to ensure the movement of the workpieces, the heating furnace is equipped with vertical racks located under the movable beam with rollers fixed at their upper ends, in contact with the movable beam and equipped with a mechanism for reciprocating their movement in the vertical direction.

Figure 1 shows a furnace with a walking hearth; figure 2 - diagram of the operation of the furnace.

Walking under the heating furnace (Fig. 1) consists of a walking beam 1. the ends 2 of which, coming out of the inductor, are rigidly fixed to the frame on the loading side and on the unloading side so that the distance between the mounting posts and the inductor provides a stroke allowing blank 3 per spin step. In order to avoid deflection of the pop beam, the support posts 4 are brought in between the turns of the inductor 5; therefore, the beam does not fasten to the support posts, but lies freely on them.

On fi £ .2, a movement diagram of the workpieces in an inductor with a sliding-walking hearth is shown. In the initial state, all structural elements occupy the positions shown in figure 2 a. In the process, each movable beam together with the support posts rises (Fig.2b), then makes a horizontal stroke (Fig.2c), in which only the mounting posts move, and the support posts remain stationary (the beam slides over them)} then the beam and all racks are lowered (Fig.2d) and the beam on the mounting racks, sliding along the remaining stationary support racks, is raised to its original position (Fig, 2e). To reduce the coefficient of friction between the beam and the supporting posts, rolling elements 6 (rollers, balls, etc.) can be installed.

Claims (1)

The invention relates to heating installations designed to heat a metal prior to pressure treatment. Heating furnaces with stepping hearths are known; they contain fixed support beams and a movable beam, provided with a drive, located between them with the possibility of reciprocating movement in the longitudinal direction. Such mechanisms are widely used in forging shops, mainly for the mechanization of plasma and electric furnaces. The mechanization of induction installations is made difficult by the need to introduce intermediate supports, especially with a significant inductor length and a large beam weight. Since these SUPPORTS are introduced by the turns of the inductor coil, the step size MUST take the minimum and a large number of steps must be taken to remove the workpiece from the working chamber of the inductor, and this in turn leads to. that the workpiece, gradually creeping out of the inductor, ceases to be heated by its magnetic field, continues to be intensively cooled, releasing heat to the walking beam and to the surrounding environment. In order to ensure the movement of the blanks, the heating furnace is equipped with vertical columns located under the movable beam with rollers fixed at their upper ends, in contact with the movable beam and equipped with a reciprocating mechanism for moving them in the vertical direction. Figure 4.1 shows a walking hearth furnace; 2 on the diagram of the furnace. Walking under the heating furnace (fig. O consists of walking beam 1. whose 2, coming out of the inductor, are rigidly fixed on the frame of the loading side and on the unloading side in such a way that the gap between the ridge posts and the inductor provides allowing you to pass workpiece 3 for opium pitch. In order to avoid the deflection of the pop beam, the support posts 4, which are between the turns of the inductor 5, the beam, are not attached to the support posts, but lie freely on them. slider-step billet in the inductor In the initial state, all the structural elements occupy the positions shown in phi1.2a. During operation, each movable beam rises together with the supporting struts (FIG. 2b), then makes a horizontal stroke of Fig.2vL in which only the fastening racks move and the stand-up pillars remain unattachable (the beam slides over them), then the beam and all the pillars are lowered (fig. 2g) and the beam on the pedestals, slide 84 on the remaining fixed support pillars, return to its original position ((ig, 2d), D reduce co-friction Rolling elements 6 (rollers, balls, and t, n) can be installed between the beam and support posts. Claims of the invention A heating furnace with a walking hearth containing stationary support beams and a movable beam positioned between them with the possibility of reciprocating movement in a directional direction; equipped with a drive, characterized in that, in order to ensure the movement of the blanks in an induction furnace, it is provided with vertical columns located under the movable beam with a roll fixed to their upper ends kami contacting the movable beam and provided with a reciprocating mechanism for moving them in the vertical direction. nirrrz r-HbTib / QB7 /. gyz  t t .g