Tahan L. Improvement of technological processes of heavy forging based on the use of new methods of deformation

The object of the research is the heavy forging process such as shafts. The aim of the research is improving the efficiency of the heavy forging process such as shafts through improved methods of metal forming, development of mathematical models and recommendations for the design of forging technology. The methods of research are the complex method, comprising carrying out the installation of experiments and on the basis of theoretical analysis of the forging process with the experimental verification of the proposed solutions. Theoretical and practical results are the regularities of stress-strain state in the workpiece during forging process, depending on the geometric parameters of the tool and so the mechanical modes of forging. The regularities of forming nonprofit ingots in forging process during upsetting the annular plates with different configurations, dependences. The conditions and mechanism of defect form appear as axial dimple on the ends of the shaft in the upsetting process with flat dies defined. New knowledge is the established patterns of deformation combined with the developed shear strains in forging process such as shafts, profiled tools, defined defect form appear as axial dimple on the ends of the shaft in the upsetting process, obtained on the basis of the energy method mathematical model of combined upsetting. Efficiency implementation is the new processes and tools for heavy forging such as shafts and plates, improve the quality of forging and reduce the complexity of manufacturing, tested and approved for implementation in production. The field of application is metal forming, forging and heavy forging.