Development of the section for heating blanks from special steels and alloys

The results of work on the creation of a technological section for heating and transporting blanks from special steels and alloys intended for plastic deformation by a modern GFM SKK-14 radial forging machine performed by the Metallurgical Institute of Advanced Technologies (MIPT LLC), which is part of the METCHIV Group of Companies, are presented. The shortcomings of the known technological lines for heating blanks from special steels and alloys, methods and devices for their transportation along the working space of pusher furnaces are shown. It is proposed to install two methodical pusher furnaces in a checkerboard pattern, one of which has an end task and delivery, and the other with an end task and side delivery, providing the implementation of two technological heating options. The developed method for transporting blanks in a methodical pusher furnace is described, which ensures uniform heating of round blanks due to their independent rotation around their axis when moving along the hearth of the furnace. The developed new design of guides to protect the hearth of a repetitive pusher furnace from the mechanical impact of moving workpieces is characterized. It is proposed to use metal flexible elements in the form of tapes or rods as guides, the ends of which are connected to freely suspended loads. Proposals are presented to improve the reliability of the methodical heating furnace with lateral delivery of blanks and reduce operating costs, which consist in the use of a guide chute made of several hollow elements filled with loose fire-resistant material, and for their sealing on both sides closed with plugs. Conical male surfaces are made on the outer surfaces of the plugs. On the side walls of the furnace frame, opposite the male conical surfaces, lugs with female conical surfaces are made. All completed developments are patented.