Promising methods of forming complex profiled parts by precise volume extrusion
DOI:
https://doi.org/10.37142/2076-2151/2025-1(54)87Keywords:
radial extrusion, combined transverse and longitudinal extrusion, forming, parts with flange, hollow parts, shape defects.Abstract
Levchenko V., Aliieva L., Abhari P., Malii O., Khasanov K. Promising methods of forming complex profiled parts by precise volume extrusion
An effective way to increase the competitiveness of engineering products is to develop resource-saving technologies for forming by precise volume extrusion. Extrusion methods are characterized by the possibility of active control of metal working modes and allow obtaining precise workpieces with dimensions and quality nearing the parameters of finished parts. There is currently a tendency to increase the capabilities of extrusion processes by adding new transverse (radial and lateral) extrusion methods to traditional longitudinal extrusion ones, aimed at producing more complex parts of previously inaccessible shapes. Further development of these technologies is associated with designing methods for combining longitudinal and transverse extrusion schemes, which allows optimizing the modes for manufacturing complex-profile hollow and rod parts in one operation. The kinds of technological schemes of transverse (radial) and combined transverse-longitudinal extrusion were systematized. The groups of combined, sequential and staged combined extrusion were defined, which combine schemes carried out sequentially along the path and time of execution. The features of forming and development of the deformed state of hollow and solid parts with flanges and thickenings in radial and combined extrusion were studied experimentally and using the finite element method. An assessment of the possibilities and limitations of new technological methods for controlling metal flow and the quality of a deformed workpiece was given. The conditions for the occurrence of characteristic defects in parts, as well as methods for eliminating defects and deviations in the shape of parts, were considered.
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