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Information × Registration Number 0223U002794, 0121U110171 , R & D reports Title Development of technologies and research facility for the manufacture of polygonal small arms barrel bore by cold plastic deformation methods popup.stage_title Head Lavrinenkov Anton Dmitrovich, Кандидат технічних наук Registration Date 09-03-2023 Organization Economic and Financial Department of the Secretariat of the Cabinet of Ministers of Ukraine popup.description2 The aim of the work is to develop technologies for a pilot plant for the manufacture of a polygonal bore of a small arms barrel and typical samples of barrel blanks using cold plastic deformation methods. Based on the analysis of existing processes for the manufacture of small arms (SA) barrels, a block diagram of an integrated technological process for manufacturing a SA barrel with a polygonal bore surface by cold plastic deformation by crimping the barrel blank over a profiled mandrel is proposed. A classification of technological schemes for the implementation of the load during cold plastic deformation by crimping the shaft blanks along the mandrel is made. The fundamental difference between compression in roller pairs of rolling and compression in strikers is shown. Their advantages and disadvantages are determined. To study and refine the technological processes for manufacturing SA barrels with a polygonal channel surface, experimental installations have been developed that implement promising load patterns. Typical designs of mandrels for fixing a barrel billet for two methods of shaping the polygonal inner surface of the barrel have been developed: for all-round crimping of the barrel billet during shaping in strikers (without axial elongation) and crimping in rollers on an installation with drive rollers. It is shown that the plastically deformed zone along the thickness of the workpiece will be equal to the thickness of the workpiece if the gap between the workpiece and the mandrel is greater than 0.25…0.30 mm. Interest in using the results is confirmed by official letters from industrial customers PJSC "Motor Sich", SE ZMKB "Progress im. O.G. Ivchenko, LLC Special Design Bureau Vector-V, State Enterprise Design Bureau of Artillery Armament, JSC Mayak Plant. Product Description popup.authors Boris Ruslan S. Vyshnevsky Peter S. Gozhii Sergey P. Danylchenko Mariia A. Zhikunov Mykola M. Zlochevska Natalia K. Klisko Andriy V. Koreva Vitaliy O. Lavrinenkov Anton D. Luhovskyi Oleksandr F. Myronenko Vitaly A. Movchanuk Andrey V. Orliuk Mykhailo V. Rozov Yuriy G. Seliverstov Igor A. Sokhan Dmytro V. Titov Andrii V. Titov Vyacheslav A. Tereshchenko Petro I. Kholiavik Olha V. Chechailyuk Ihor P. Shevtsova Oksana V. popup.nrat_date 2023-03-09 Close