Development of alternative technology of dual forming of profiled workpiece obtained by buckling

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.72063

Keywords:

dual forming, impression–free profiling, profiled workpiece, die-forging of eye-bolt, buckling (longitudinal bending), butts distortion, flash

Abstract

A possibility of application of longitudinal bending (buckling) as an economical way of profiling workpieces, ensuring replacement of pinching impressions and edgers was shown for manufacturing of eye-bolt forgings. For realization of this method of impression-free profiling of blanks, a process of twin forging of eye-bolt forgings was designed as well as the arrangement of the forging facilities. The peculiarity of this process is that the cut-off blank is upset, it loses its stability and thus obtained profiled semi-finished product is turned over on its side and eventually it is put inside the impression for simultaneous forging of two forgings from one blank. It was found that profiled semi-finished items acquired the desired shape at the degree of blank’s upsetting equal to 39 %, the central angle between the twin eye-bolts forgings being 54° and it had been taken into account for the dies’ design. Experimental forming of eye-bolts forgings according to the proposed and conventional processes on physical lead models of blanks, which helped to find out that the proposed technical solution, can ensure metal saving at 21.7 % level. Comparison of these two methods revealed improved technical and economic indices of the new process; particularly the coefficient of metal consumption at cutting was raised by 1.4 %, the quotient of output of quality forgings by 21.1 % and coefficient of application of forgings metal along the consumption rate by 27.9 %.

Author Biographies

Volodymyr Kukhar, SHEI «Priazovskyi State Technical University» Universitetskaya str., 7, Mariupol, Ukraine, 87500 E-mail: kvv.mariupol@gmail.com, kvv_mariupol@mail.ru

Doctor of technical science, Professor

Department of plastic metal working

Vadym Burko, SHEI «Priazovskyi State Technical University» Universitetskaya str., 7, Mariupol, Ukraine, 87500

PhD, Associate professor

Department of labour and environment protection 

Andrii Prysiazhnyi, SHEI «Priazovskyi State Technical University» Universitetskaya str., 7, Mariupol, Ukraine, 87500

PhD, Associate professor

Department of plastic metal working

Elena Balalayeva, SHEI «Priazovskyi State Technical University» Universitetskaya 7, Mariupol, Ukraine, 87500

PhD, Associate professor

Department of information science

Mykyta Nyhnibeda, SHEI «Priazovskyi State Technical University» Universitetskaya str., 7, Mariupol, Ukraine, 87500

Department of metallurgy of black metals

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Published

2016-06-30

How to Cite

Kukhar, V., Burko, V., Prysiazhnyi, A., Balalayeva, E., & Nyhnibeda, M. (2016). Development of alternative technology of dual forming of profiled workpiece obtained by buckling. Eastern-European Journal of Enterprise Technologies, 3(7(81), 53–61. https://doi.org/10.15587/1729-4061.2016.72063

Issue

Section

Applied mechanics