Designing a kinematic module with rounding to model the processes of combined radial-longitudinal extrusion involving a tool whose configuration is complex
| Autor: | Natalia Hrudkina, Igramotdin Aliiev, Oleg Markov, Iurii Savchenko, Liudmyla Sukhovirska, Liubov Tahan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
020209 energy
0211 other engineering and technologies Energy Engineering and Power Technology Boundary (topology) 02 engineering and technology Kinematics simulation of combined extrusion processes Industrial and Manufacturing Engineering tool configuration Matrix (mathematics) Management of Technology and Innovation 021105 building & construction 0202 electrical engineering electronic engineering information engineering T1-995 Industry Electrical and Electronic Engineering Technology (General) Mathematics Curvilinear coordinates Deformation (mechanics) Applied Mathematics Mechanical Engineering Rounding Mathematical analysis kinematic module energy method HD2321-4730.9 Computer Science Applications Transverse plane Control and Systems Engineering Vector field |
| Zdroj: | Eastern-European Journal of Enterprise Technologies, Vol 2, Iss 1 (110), Pp 81-89 (2021) |
| Popis: | It is advisable that parts whose shape is complex and which are made from solid or hollow blanks should be made by means of transverse and combined radial-longitudinal extrusion. The variation of manufacturing modes, tool configurations (in the form of chambers and rounding of the transitional sections of matrices) requires an adequate preliminary assessment of the force regime and the features of part shape formation. This paper has proposed a curvilinear kinematic module of the trapezoidal form for modeling radial-longitudinal extrusion processes in the presence of matrix rounding. Given the impossibility of using a quarter-circle boundary for the kinematically assigned possible velocity field, it has been proposed to use approximate curves in the form of z1(r) and z2(r). Taking into account the slightest deviation in the length of the arc of the approximate curve z1(r) and the area of the curvilinear trapezoid bounded by it relative to a quarter of the circle (not exceeding 0.8% for any ratio), it has been recommended using this particular replacement. We have performed calculations of the value of the reduced deformation pressure inside the kinematic module with rounding taking into consideration the power of cutting forces at the border with adjacent kinematic modules. As an example, the devised module with rounding embedded in the estimation scheme of radial extrusion was analyzed. A significant impact of friction conditions on the force mode and the corresponding optimal value of the rounding radius have been identified. The resulting kinematic module makes it possible to expand the capabilities of the energy method for modeling cold extrusion processes involving the tools of complex form according to new deformation schemes. That could contribute to preparing recommendations on the optimal tool configuration and more active industrial implementation of these processes |
| Databáze: | OpenAIRE |
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