期刊名称：Eastern-European Journal of Enterprise Technologies
印刷版ISSN：1729-3774
电子版ISSN：1729-4061
出版年度：2016
卷号：3
期号：7
页码：53-61
DOI：10.15587/1729-4061.2016.72063
语种：English
出版社：PC Technology Center
摘要：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 %.
关键词：dual forming;impression–free profiling;profiled workpiece;die-forging of eye-bolt;buckling (longitudinal bending);butts distortion;flash
