Gorokhov YV, Belyaev SV, Uskov IV et al (2016) Application of combined die-casting process in the manufacture of aluminum wire for waveguide soldering. Yun XB, Tian T, Zhan H et al (2018) Microstructure evolution of copper strip during continuous extrusion and rolling forming. Li Y, Zhang Y, Cui S et al (2015) Deformation zone distribution of continuous extrusion process. Ĭao F, Jinglin W (2013) Progress and development trend on the study of metallic Castex technique. Īborkin AV, Elkin AI, Babin DM (2015) Features of the variation of energy-power parameters, temperature, and hydrostatic pressure under continuous extrusion of a noncompact aluminum material. Sherkunov VG, Gorokhov YV, Konstantinov IL et al (2015) The use of the «konform» method to process the aluminum alloy chips. Trans Nonferrous Met Soc China 25:1763–1769. Zhang X, Zhang H, Kong X, Fu D (2015) Microstructure and properties of Al−0.70Fe−0.24Cu alloy conductor prepared by horizontal continuous casting and subsequent continuous extrusion forming. In: Smirnov LA, Protopopov EV et al (eds) XX Metallurgy: technology, innovation, quality. Sidelnikov SB, Lopatina ES, Kleymenova YY et al (2017) Study the process of obtaining and properties of wire rod made of alloy AVE with using the combined methods of treatment. In: Korchunov AG (ed) Magnitogorsk Rolling Practice 2018. Kovin DS, Fominykh RV, Shimov GV (2018) Optimization of the CONFORM continuous extrusion scheme using flash cutting over the entire surface of the workpiece. Morozov AA (2015) Continuous pressing by the conform method. Sakhe PK (2015) Technology of aluminium extrusion. Gorokhov YV, Sergeev VM, Kornilov VN (1987) Power parameters of continuous metal pressing by conform method. Lokshin MZ, Shamraev VN, Avdeev VV et al (1992) Modern methods of continuous pressing of pipes, profiles, wire. Raab GI, Raab AG, Shibakov VG (2015) Analysis of shear deformation scheme efficiency in plastic structure formation processes. Gorokhov YV, Solopko IV, Suslov VP (2010) Calculation of the minimum length of the container at continuous pressing conform. Gorokhov YV, Sergeev VM, Sherkunov VG et al (1989) Analytical determination of the force conditions of the process of pressing wire from aluminum alloys. KSPU Pub, Krasnoyarskīowser M, Sauer G, Siegert K (2009) Pressing. Kornilov VN (1993) Continuous pressing with welding of aluminum alloys. Shcherba VN (2001) Pressing of aluminum alloys. This confirms the position that the maximum value of friction stresses can significantly exceed the yield strength of the workpiece material averaged over the volume of the deformation zone under pure shear in the process of continuous pressing by the conform method. As a result of this work, by solving the equation of the balance of forces required for a stable process of metal extrusion into a die hole, based on the actual length of the contact arc between the workpiece and the container, the calculated value of the friction index was obtained ( μ = 1.56). However, the determination of the true resistance to deformation in a thin near-contact metal layer is very difficult, so this value in the calculations can be corrected by the friction index ( μ) obtained by experiment. According to a number of researchers, when using the Siebel law, this value can reach more than 1.0 and is called the “friction index.” This is due to the fact that the maximum value of resistance to deformation in the near-contact layer can significantly exceed the value averaged over the deformation zone. ![]() In calculations related to the flow of metal along the contact surface of the tool, the friction coefficient is usually assumed to be no more than 0.58. Since the main friction process occurs in the near-contact layer “deformable metal-tool,” the maximum possible value of the friction stress ( τ) cannot exceed the intensity of shear stresses acting on this boundary. ![]() It is possible to forcibly create conditions under which these forces will not hinder but promote the improvement of the metal forming process. The kinematics of the plastic flow of the metal processed by pressure along the contact surface of the tool is largely determined by the direction of the friction forces acting in the boundary layer.
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