HEATING FURNACE

According to the invention, the heating furnace with rotary hearth is employed to heat large-scale small-sized metal blanks to be subsequently subjected to die forging operations. The furnace, as claimed by the invention, is characterized in that it comprises an external metal structure (), an internal ceramic structure () and an insulation () which are arranged vertically and are supported by the foundation by means of several supports () attached to the external metal structure inside which, towards the lower part, there is a metal-ceramic rotary hearth () on which the pieces are placed to be heated by the radiation of a radiating vault in the center of which there is a burner () with flat short flame, the burnt gases generated by the parabolic combustion chamber () of the burner () being centrifuged under the vault, for making them move in close contact therewith and with the ceramic blocks () which make up the external vertical wall of the work space (), away from the pieces on the hearth, which are subjected to heating, after which they are sucked through the L-shaped channels () cut inside the ceramic blocks () and, further, through the annular collecting channel () located within the furnace vault, to be afterwards sucked by the furnace stack. The claimed rotary hearth consists of a vertical cylindrical hollow body () to which there are attached: a support plate (), an edge (), an annular circular trough () filled with packing material (), a toothed crown () meant to drive the mobile hearth into rotation, by means of a worm screw (), and an annular supporting and rolling tyre () resting on the supporting rollers () fixed on an annular metal frame () which is detachably mounted onto the fixed furnace structure. Cuptorul de încălzire cu vatră mobilă rotativă, conform invenţiei, este folosit la încălzirea unor semifabricate metalice mici, de serie mare, ce urmează să fie supuse operaţiilor de matriţare. Cuptorul conform invenţiei este caracterizat prin aceea că este alcătuit dintr-o structură metalică () exterioară, o structură ceramică () interioară şi o izolaţie (), dispuse vertical şi susţinute pe fundaţie cu mai multe suporturi () ataşate la structura metalică exterioară, în interiorul căreia, spre partea inferioară, se află o vatră rotativă () metalo-ceramică, pe care se pun piesele pentru a fi încălzite de radiaţia unei bolţi radiante, în centrul căreia se află un arzător cu flacără plată () scurtă, gazele de ardere generate de camera de ardere (