The article discusses the design of the stand for the diagnosis and determination of the optimal modes of thermo-force processing (TFP) of light-hard long shaft-type parts. The stand is equipped with an automatic control system (ACS) for heating, cooling and axial plastic deformation. ACS includes three control loops. The functional scheme of the stand and its operation algorithm are described.

No abstract

The development relates to machine tool construction, in particular, to the technological processes of chip removal with automatic control of technical process parameters. The installation allows you to automatically manage the process of turning. New in the process of turning is that the position of the cutter in the ZOY plane is changed directly in the cutting process, which reduces cutting forces. Registration of which is carried out by an indirect method based on the analysis of vibroacoustic emission, and is corrected by information about the torque on the main drive of the machine. The installation is a tool rotation mechanism, in which the worm-worm sector, is equipped with a controlled drive and a feedback control circuit on the position of the worm.

Purification of heavily doped electronic grade silicon by evaporation of N‐type impurities with electron beam heating was investigated in process with a batch weight up to 50 kilos. Effective temperature of the melt, an indicative parameter suitable for purification process characterization was calculated and appeared to be stable for different load weight processes. Purified material was successfully approbated in standard CZ processes of three different companies. Each company used its standard process and obtained CZ monocrystals applicable for photovoltaic application. These facts enable process to be successfully scaled up to commercial volumes (150‐300 kg) and yield solar grade silicon. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

No abstract