- TITLE:
STIFFNESS FACTOR FORMATION UNDER STRUCTURAL CIRCUIT SYNTHESIS OF INDUSTRIAL ROBOTS WIRE-FRAME ARRANGEMENTS
- AUTHOR(S):
Alrefo Ibrahim F.S.
- ABSTRACT:
It is suggested that the best solutions during the structural circuit synthesis of wireframe arrangements for industrial robots with and without the mechanisms of parallel structure are chosen on account of the integrated stiffness index based on the relative stiffness factor (where the round rod of the same cross section and length is taken as a rating criterion) and stiffness instability factor within a manipulated object travelling area.
- TITLE:
OPTIMIZATION OF ELASTIC ABRASIVE CUTTING PROCESS OF ROTATING WORKPIECES MADE OF C45 STEEL
- AUTHOR(S):
I. Alexandrova,
- ABSTRACT:
The paper presents the results of a multiobjective optimization of the elastic abrasive cutting process conditions of rotating workpieces made of C45 steel. A generalized utility function has been chosen as an optimization parameter and has been used as a complex indicator of the technological, economic and dynamic elastic abrasive cutting process parameters. For its determination an adequate theoretical and
experimental model has been built, reflecting the complex influence of the elastic abrasive cutting conditions. The solution of the optimization problem has been reduced to the determination of combinations of values of the compression force, the cut-off wheel diameter and the workpiece rotational frequency for which the generalized utility function has a maximum and which guarantee an optimum
combination of the following: the cut-off wheel lifetime, the tangential cutting force magnitude, the temperature of the cut piece and the cut - off operation cost and production rate.
- TITLE:
THERMAL EFFICIENCY OF A COMBINED CRADLE-CONVEYER TYPE OF SOLAR-FUEL DRYING INSTALLATION
- AUTHOR(S):
K. Norkulova, Z. Iskandarov, A. Halimov, J. Safarov, B. Boltaev, B. Ergashev
- ABSTRACT:
It is shown the problems of the influence of the perforation method of an aluminum-magnesium foil on its strength characteristics. Discussed concept of the research stand. It is given the results of numerical and natural experiments. Received recommendatio ns of the selection of an optimum method for perforation manufacturing during processing of rolled thin sheet specimens of metal cellular panels.
- TITLE:
RESEARCH DRYING CURVE OF MEDICINAL HERBS
- AUTHOR(S):
K. T. Norkulova, J. E. Safarov
- ABSTRACT:
Authors carry out the influence analysis of friction forces, joints contact rigidity and "clamping element-clamping object" and "clamping element-clamping chuck" subsystems’ rigidities proportion on the different clamping stages in the cases of non-rotating and rotating spindle, taking into account the centrifugal forces of unstable clamping elements. Recommendations on the improvement of clamping chucks power characteristics at high-speed treatment are given here.
- TITLE:
ON SOME ASPECTS OF TRAINING GERMAN FOR SPECIAL PURPOSES - TECHNICAL GERMAN
- AUTHOR(S):
S. Dragozova
- ABSTRACT:
This paper deals with the characteristic features of languages for special purposes, technical German in particular, from the point of view of foreign language teaching. Special attention is paid to terminology as the most distinctive feature of the languages for special purposes. The language is examined in certain types of texts relevant to the language of science and technology. Conclusions have been drawn with regard to the degree of abstractedness and specialization of the texts that are to be used in the course of foreign language teaching for special purposes.
