2 research outputs found
Π ΠΎΠ·ΡΠΎΠ±ΠΊΠ° ΠΊΡΠ½Π΅ΠΌΠ°ΡΠΈΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄ΡΠ»Ρ ΡΠ· Π·Π°ΠΎΠΊΡΡΠ³Π»Π΅Π½Π½ΡΠΌ Π΄Π»Ρ ΠΌΠΎΠ΄Π΅Π»ΡΠ²Π°Π½Π½Ρ ΠΏΡΠΎΡΠ΅ΡΡΠ² ΠΊΠΎΠΌΠ±ΡΠ½ΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΡΠ°Π΄ΡΠ°Π»ΡΠ½ΠΎ-ΠΏΠΎΠ·Π΄ΠΎΠ²ΠΆΠ½ΡΠΎΠ³ΠΎ Π²ΠΈΠ΄Π°Π²Π»ΡΠ²Π°Π½Π½Ρ ΡΡΡΡΡΠΌΠ΅Π½ΡΠΎΠΌ ΡΠΊΠ»Π°Π΄Π½ΠΎΡ ΠΊΠΎΠ½ΡΡΠ³ΡΡΠ°ΡΡΡ
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 0.8Β % 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 processesΠ‘Π»ΠΎΠΆΠ½ΡΠ΅ ΠΏΠΎ ΡΠΎΡΠΌΠ΅ Π΄Π΅ΡΠ°Π»ΠΈ ΠΈΠ· ΡΠΏΠ»ΠΎΡΠ½ΡΡ
ΠΈΠ»ΠΈ ΠΏΠΎΠ»ΡΡ
Π·Π°Π³ΠΎΡΠΎΠ²ΠΎΠΊ ΡΠ΅Π»Π΅ΡΠΎΠΎΠ±ΡΠ°Π·Π½ΠΎ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΡ ΡΠΏΠΎΡΠΎΠ±Π°ΠΌΠΈ ΠΏΠΎΠΏΠ΅ΡΠ΅ΡΠ½ΠΎΠ³ΠΎ ΠΈ ΠΊΠΎΠΌΠ±ΠΈΠ½ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΡΠ°Π΄ΠΈΠ°Π»ΡΠ½ΠΎ-ΠΏΡΠΎΠ΄ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ Π²ΡΠ΄Π°Π²Π»ΠΈΠ²Π°Π½ΠΈΡ. ΠΠ°Π»ΠΈΡΠΈΠ΅ Π²Π°ΡΠΈΠ°ΡΠΈΠΈ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΠΆΠΈΠΌΠΎΠ², ΠΊΠΎΠ½ΡΠΈΠ³ΡΡΠ°ΡΠΈΠΈ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ° (Π² Π²ΠΈΠ΄Π΅ ΡΠ°ΡΠΎΠΊ ΠΈ Π·Π°ΠΊΡΡΠ³Π»Π΅Π½ΠΈΠΉ ΠΏΠ΅ΡΠ΅Ρ
ΠΎΠ΄Π½ΡΡ
ΡΡΠ°ΡΡΠΊΠΎΠ² ΠΌΠ°ΡΡΠΈΡ) Π½Π° ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²Π΅ ΡΡΠ΅Π±ΡΠ΅Ρ Π½Π°Π»ΠΈΡΠΈΡ Π°Π΄Π΅ΠΊΠ²Π°ΡΠ½ΠΎΠΉ ΠΏΡΠ΅Π΄Π²Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΠΎΡΠ΅Π½ΠΊΠΈ ΡΠΈΠ»ΠΎΠ²ΠΎΠ³ΠΎ ΡΠ΅ΠΆΠΈΠΌΠ° ΠΈ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠ΅ΠΉ ΡΠΎΡΠΌΠΎΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ Π΄Π΅ΡΠ°Π»ΠΈ. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ ΠΊΡΠΈΠ²ΠΎΠ»ΠΈΠ½Π΅ΠΉΠ½ΡΠΉ ΠΊΠΈΠ½Π΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΌΠΎΠ΄ΡΠ»Ρ ΡΡΠ°ΠΏΠ΅ΡΠ΅ΠΈΠ΄Π°Π»ΡΠ½ΠΎΠΉ ΡΠΎΡΠΌΡ Π΄Π»Ρ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² ΡΠ°Π΄ΠΈΠ°Π»ΡΠ½ΠΎ-ΠΏΡΠΎΠ΄ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ Π²ΡΠ΄Π°Π²Π»ΠΈΠ²Π°Π½ΠΈΡ Ρ Π½Π°Π»ΠΈΡΠΈΠ΅ΠΌ Π·Π°ΠΊΡΡΠ³Π»Π΅Π½ΠΈΡ ΠΌΠ°ΡΡΠΈΡΡ. Π£ΡΠΈΡΡΠ²Π°Ρ Π½Π΅Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π΄Π»Ρ Π·Π°Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΠΊΠΈΠ½Π΅ΠΌΠ°ΡΠΈΡΠ½ΠΎ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ ΡΠΊΠΎΡΠΎΡΡΠ΅ΠΉ Π³ΡΠ°Π½ΠΈΡΡ Π² Π²ΠΈΠ΄Π΅ ΡΠ΅ΡΠ²Π΅ΡΡΠΈ ΠΊΡΡΠ³Π°, ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΈΠ±Π»ΠΈΠΆΠ΅Π½Π½ΡΡ
ΠΊΡΠΈΠ²ΡΡ
Π²ΠΈΠ΄Π° z1(r) ΠΈ z2(r). Π£ΡΠΈΡΡΠ²Π°Ρ Π½Π°ΠΈΠΌΠ΅Π½ΡΡΠ΅Π΅ ΠΎΡΠΊΠ»ΠΎΠ½Π΅Π½ΠΈΠ΅ Π΄Π»ΠΈΠ½Ρ Π΄ΡΠ³ΠΈ ΠΏΡΠΈΠ±Π»ΠΈΠΆΠ΅Π½Π½ΠΎΠΉ ΠΊΡΠΈΠ²ΠΎΠΉ ΠΈ ΠΏΠ»ΠΎΡΠ°Π΄ΠΈ ΠΊΡΠΈΠ²ΠΎΠ»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠΉ ΡΡΠ°ΠΏΠ΅ΡΠΈΠΈ, ΠΎΠ³ΡΠ°Π½ΠΈΡΠ΅Π½Π½ΠΎΠΉ Π΅Ρ, ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΡΠ΅ΡΠ²Π΅ΡΡΠΈ ΠΊΡΡΠ³Π° (Π½Π΅ ΠΏΡΠ΅Π²ΡΡΠ°Π΅Ρ 0,8 % ΠΏΡΠΈ Π»ΡΠ±ΡΡ
ΡΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡΡ
), ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄ΡΠ΅ΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΈΠΌΠ΅Π½Π½ΠΎ ΡΡΠΎΠΉ Π·Π°ΠΌΠ΅Π½Ρ. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Ρ ΡΠ°ΡΡΠ΅ΡΡ Π²Π΅Π»ΠΈΡΠΈΠ½Ρ ΠΏΡΠΈΠ²Π΅Π΄Π΅Π½Π½ΠΎΠ³ΠΎ Π΄Π°Π²Π»Π΅Π½ΠΈΡ Π΄Π΅ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π²Π½ΡΡΡΠΈ ΠΊΠΈΠ½Π΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠΎΠ΄ΡΠ»Ρ Ρ Π·Π°ΠΊΡΡΠ³Π»Π΅Π½ΠΈΠ΅ΠΌ Ρ ΡΡΠ΅ΡΠΎΠΌ ΠΌΠΎΡΠ½ΠΎΡΡΠ΅ΠΉ ΡΠΈΠ» ΡΡΠ΅Π·Π° Π½Π° Π³ΡΠ°Π½ΠΈΡΠ΅ ΡΠΎ ΡΠΌΠ΅ΠΆΠ½ΡΠΌΠΈ ΠΊΠΈΠ½Π΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΌΠΎΠ΄ΡΠ»ΡΠΌΠΈ. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΏΡΠΈΠΌΠ΅ΡΠ° ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π° Π²ΡΡΡΠ°ΠΈΠ²Π°Π΅ΠΌΠΎΡΡΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄ΡΠ»Ρ Ρ Π·Π°ΠΊΡΡΠ³Π»Π΅Π½ΠΈΠ΅ΠΌ Π² ΡΠ°ΡΡΠ΅ΡΠ½ΡΡ ΡΡ
Π΅ΠΌΡ ΡΠ°Π΄ΠΈΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π²ΡΠ΄Π°Π²Π»ΠΈΠ²Π°Π½ΠΈΡ. ΠΡΡΠ²Π»Π΅Π½ΠΎ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΡΡΠ΅Π½ΠΈΡ Π½Π° ΡΠΈΠ»ΠΎΠ²ΠΎΠΉ ΡΠ΅ΠΆΠΈΠΌ ΠΈ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΡΡΡΠ΅Π΅ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΡΠ°Π΄ΠΈΡΡΠ° Π·Π°ΠΊΡΡΠ³Π»Π΅Π½ΠΈΡ. Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π½ΡΠΉ ΠΊΠΈΠ½Π΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΌΠΎΠ΄ΡΠ»Ρ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΡΠ°ΡΡΠΈΡΠΈΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ ΡΠ½Π΅ΡΠ³Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠ΅ΡΠΎΠ΄Π° Π΄Π»Ρ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² Ρ
ΠΎΠ»ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π²ΡΠ΄Π°Π²Π»ΠΈΠ²Π°Π½ΠΈΡ ΡΠΎ ΡΠ»ΠΎΠΆΠ½ΠΎΠΉ ΡΠΎΡΠΌΠΎΠΉ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ° ΠΏΠΎ Π½ΠΎΠ²ΡΠΌ ΡΡ
Π΅ΠΌΠ°ΠΌ Π΄Π΅ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ. ΠΡΠΎ Π±ΡΠ΄Π΅Ρ ΡΠΏΠΎΡΠΎΠ±ΡΡΠ²ΠΎΠ²Π°ΡΡ Π²ΡΡΠ°Π±ΠΎΡΠΊΠ΅ ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°ΡΠΈΠΉ ΠΏΠΎ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠΉ ΠΊΠΎΠ½ΡΠΈΠ³ΡΡΠ°ΡΠΈΠΈ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ° ΠΈ Π±ΠΎΠ»Π΅Π΅ Π°ΠΊΡΠΈΠ²Π½ΠΎΠΌΡ Π²Π½Π΅Π΄ΡΠ΅Π½ΠΈΡ Π΄Π°Π½Π½ΡΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² Π½Π° ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²Π΅Π‘ΠΊΠ»Π°Π΄Π½Ρ Π·Π° ΡΠΎΡΠΌΠΎΡ Π΄Π΅ΡΠ°Π»Ρ ΡΠ· ΡΡΡΡΠ»ΡΠ½ΠΈΡ
Π°Π±ΠΎ ΠΏΠΎΡΠΎΠΆΠ½ΠΈΡΡΠΈΡ
Π·Π°Π³ΠΎΡΠΎΠ²ΠΎΠΊ Π΄ΠΎΡΡΠ»ΡΠ½ΠΎ Π²ΠΈΠ³ΠΎΡΠΎΠ²Π»ΡΡΠΈ ΡΠΏΠΎΡΠΎΠ±Π°ΠΌΠΈ ΠΏΠΎΠΏΠ΅ΡΠ΅ΡΠ½ΠΎΠ³ΠΎ Ρ ΠΊΠΎΠΌΠ±ΡΠ½ΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΡΠ°Π΄ΡΠ°Π»ΡΠ½ΠΎ-ΠΏΠΎΠ·Π΄ΠΎΠ²ΠΆΠ½ΡΠΎΠ³ΠΎ Π²ΠΈΠ΄Π°Π²Π»ΡΠ²Π°Π½Π½Ρ. ΠΠ°ΡΠ²Π½ΡΡΡΡ Π²Π°ΡΡΠ°ΡΡΡ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΡΠ½ΠΈΡ
ΡΠ΅ΠΆΠΈΠΌΡΠ², ΠΊΠΎΠ½ΡΡΠ³ΡΡΠ°ΡΡΡ ΡΠ½ΡΡΡΡΠΌΠ΅Π½ΡΡ (Ρ Π²ΠΈΠ³Π»ΡΠ΄Ρ ΡΠ°ΡΠΎΠΊ ΡΠ° Π·Π°ΠΎΠΊΡΡΠ³Π»Π΅Π½Ρ ΠΏΠ΅ΡΠ΅Ρ
ΡΠ΄Π½ΠΈΡ
Π΄ΡΠ»ΡΠ½ΠΎΠΊ ΠΌΠ°ΡΡΠΈΡΡ) Π½Π° Π²ΠΈΡΠΎΠ±Π½ΠΈΡΡΠ²Ρ Π²ΠΈΠΌΠ°Π³Π°Ρ Π½Π°ΡΠ²Π½ΠΎΡΡΡ Π°Π΄Π΅ΠΊΠ²Π°ΡΠ½ΠΎΡ ΠΏΠΎΠΏΠ΅ΡΠ΅Π΄Π½ΡΠΎΡ ΠΎΡΡΠ½ΠΊΠΈ ΡΠΈΠ»ΠΎΠ²ΠΎΠ³ΠΎ ΡΠ΅ΠΆΠΈΠΌΡ ΡΠ° ΠΎΡΠΎΠ±Π»ΠΈΠ²ΠΎΡΡΠ΅ΠΉ ΡΠΎΡΠΌΠΎΡΡΠ²ΠΎΡΠ΅Π½Π½Ρ Π΄Π΅ΡΠ°Π»Ρ. ΠΠ°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΎ ΠΊΡΠΈΠ²ΠΎΠ»ΡΠ½ΡΠΉΠ½ΠΈΠΉ ΠΊΡΠ½Π΅ΠΌΠ°ΡΠΈΡΠ½ΠΈΠΉ ΠΌΠΎΠ΄ΡΠ»Ρ ΡΡΠ°ΠΏΠ΅ΡΠ΅ΡΠ΄Π°Π»ΡΠ½ΠΎΡ ΡΠΎΡΠΌΠΈ Π΄Π»Ρ ΠΌΠΎΠ΄Π΅Π»ΡΠ²Π°Π½Π½Ρ ΠΏΡΠΎΡΠ΅ΡΡΠ² ΡΠ°Π΄ΡΠ°Π»ΡΠ½ΠΎ-ΠΏΠΎΠ·Π΄ΠΎΠ²ΠΆΠ½ΡΠΎΠ³ΠΎ Π²ΠΈΠ΄Π°Π²Π»ΡΠ²Π°Π½Π½Ρ ΡΠ· Π½Π°ΡΠ²Π½ΡΡΡΡ Π·Π°ΠΎΠΊΡΡΠ³Π»Π΅Π½Π½Ρ ΠΌΠ°ΡΡΠΈΡΡ. ΠΡΠ°Ρ
ΠΎΠ²ΡΡΡΠΈ Π½Π΅ΠΌΠΎΠΆΠ»ΠΈΠ²ΡΡΡΡ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½Ρ Π΄Π»Ρ Π·Π°Π΄Π°Π½ΠΎΠ³ΠΎ ΠΊΡΠ½Π΅ΠΌΠ°ΡΠΈΡΠ½ΠΎ ΠΌΠΎΠΆΠ»ΠΈΠ²ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ ΡΠ²ΠΈΠ΄ΠΊΠΎΡΡΠ΅ΠΉ ΠΌΠ΅ΠΆΡ Ρ Π²ΠΈΠ³Π»ΡΠ΄Ρ ΡΠ²Π΅ΡΡΡ ΠΊΠΎΠ»Π°, Π·Π°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΎ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½Ρ Π½Π°Π±Π»ΠΈΠΆΠ΅Π½ΠΈΡ
ΠΊΡΠΈΠ²ΠΈΡ
Π²ΠΈΠ³Π»ΡΠ΄Ρ z1(r) ΡΠ° z2(r). Π ΠΎΠ³Π»ΡΠ΄Ρ Π½Π° Π½Π°ΠΉΠΌΠ΅Π½ΡΠ΅ Π²ΡΠ΄Ρ
ΠΈΠ»Π΅Π½Π½Ρ Π΄ΠΎΠ²ΠΆΠΈΠ½ΠΈ Π΄ΡΠ³ΠΈ Π½Π°Π±Π»ΠΈΠΆΠ΅Π½ΠΎΡ ΠΊΡΠΈΠ²ΠΎΡ z1(r) ΡΠ° ΠΏΠ»ΠΎΡΡ ΠΊΡΠΈΠ²ΠΎΠ»ΡΠ½ΡΠΉΠ½ΠΎΡ ΡΡΠ°ΠΏΠ΅ΡΡΡ, ΡΠΎ ΠΎΠ±ΠΌΠ΅ΠΆΠ΅Π½Π° Π½Π΅Ρ, Π²ΡΠ΄Π½ΠΎΡΠ½ΠΎ ΡΠ²Π΅ΡΡΡ ΠΊΠΎΠ»Π° (Π½Π΅ ΠΏΠ΅ΡΠ΅Π²ΠΈΡΡΡ 0,8 % Π·Π° Π±ΡΠ΄Ρ-ΡΠΊΠΈΡ
ΡΠΏΡΠ²Π²ΡΠ΄Π½ΠΎΡΠ΅Π½Ρ), ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄ΠΎΠ²Π°Π½ΠΎ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½Ρ ΡΠ°ΠΌΠ΅ ΡΡΡΡ Π·Π°ΠΌΡΠ½ΠΈ. ΠΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΡΠΎΠ·ΡΠ°Ρ
ΡΠ½ΠΊΠΈ Π²Π΅Π»ΠΈΡΠΈΠ½ΠΈ ΠΏΡΠΈΠ²Π΅Π΄Π΅Π½ΠΎΠ³ΠΎ ΡΠΈΡΠΊΡ Π΄Π΅ΡΠΎΡΠΌΡΠ²Π°Π½Π½Ρ Π²ΡΠ΅ΡΠ΅Π΄ΠΈΠ½Ρ ΠΊΡΠ½Π΅ΠΌΠ°ΡΠΈΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄ΡΠ»Ρ ΡΠ· Π·Π°ΠΎΠΊΡΡΠ³Π»Π΅Π½Π½ΡΠΌ ΡΠ· ΡΡΠ°Ρ
ΡΠ²Π°Π½Π½ΡΠΌ ΠΏΠΎΡΡΠΆΠ½ΠΎΡΡΠ΅ΠΉ ΡΠΈΠ» Π·ΡΡΠ·Ρ Π½Π° ΠΌΠ΅ΠΆΡ ΡΠ· ΡΡΠΌΡΠΆΠ½ΠΈΠΌΠΈ ΠΊΡΠ½Π΅ΠΌΠ°ΡΠΈΡΠ½ΠΈΠΌΠΈ ΠΌΠΎΠ΄ΡΠ»ΡΠΌΠΈ. Π£ ΡΠΊΠΎΡΡΡ ΠΏΡΠΈΠΊΠ»Π°Π΄Ρ ΠΏΡΠΎΠ°Π½Π°Π»ΡΠ·ΠΎΠ²Π°Π½ΠΎ Π²Π±ΡΠ΄ΠΎΠ²Π°Π½Π½ΡΡΡΡ ΡΠΎΠ·ΡΠΎΠ±Π»Π΅Π½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄ΡΠ»Ρ ΡΠ· Π·Π°ΠΎΠΊΡΡΠ³Π»Π΅Π½Π½ΡΠΌ Ρ ΡΠΎΠ·ΡΠ°Ρ
ΡΠ½ΠΊΠΎΠ²Ρ ΡΡ
Π΅ΠΌΡ ΡΠ°Π΄ΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π²ΠΈΠ΄Π°Π²Π»ΡΠ²Π°Π½Π½Ρ. ΠΠΈΡΠ²Π»Π΅Π½ΠΎ ΡΡΡΡΡΠ²ΠΈΠΉ Π²ΠΏΠ»ΠΈΠ² ΡΠΌΠΎΠ² ΡΠ΅ΡΡΡ Π½Π° ΡΠΈΠ»ΠΎΠ²ΠΈΠΉ ΡΠ΅ΠΆΠΈΠΌ ΡΠ° Π²ΡΠ΄ΠΏΠΎΠ²ΡΠ΄Π½Π΅ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½Π΅ Π·Π½Π°ΡΠ΅Π½Π½Ρ ΡΠ°Π΄ΡΡΡΡ Π·Π°ΠΎΠΊΡΡΠ³Π»Π΅Π½Π½Ρ. Π ΠΎΠ·ΡΠΎΠ±Π»Π΅Π½ΠΈΠΉ ΠΊΡΠ½Π΅ΠΌΠ°ΡΠΈΡΠ½ΠΈΠΉ ΠΌΠΎΠ΄ΡΠ»Ρ Π΄ΠΎΠ·Π²ΠΎΠ»ΡΡ ΡΠΎΠ·ΡΠΈΡΠΈΡΠΈ ΠΌΠΎΠΆΠ»ΠΈΠ²ΠΎΡΡΡ Π΅Π½Π΅ΡΠ³Π΅ΡΠΈΡΠ½ΠΎΠ³ΠΎ ΠΌΠ΅ΡΠΎΠ΄Ρ Π΄Π»Ρ ΠΌΠΎΠ΄Π΅Π»ΡΠ²Π°Π½Π½Ρ ΠΏΡΠΎΡΠ΅ΡΡΠ² Ρ
ΠΎΠ»ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π²ΠΈΠ΄Π°Π²Π»ΡΠ²Π°Π½Π½Ρ ΡΠ· ΡΠΊΠ»Π°Π΄Π½ΠΎΡ ΡΠΎΡΠΌΠΎΡ ΡΠ½ΡΡΡΡΠΌΠ΅Π½ΡΡ Π·Π° Π½ΠΎΠ²ΠΈΠΌΠΈ ΡΡ
Π΅ΠΌΠ°ΠΌΠΈ Π΄Π΅ΡΠΎΡΠΌΡΠ²Π°Π½Π½Ρ. Π¦Π΅ ΡΠΏΡΠΈΡΡΠΈΠΌΠ΅ Π²ΠΈΡΠΎΠ±Π»Π΅Π½Π½Ρ ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°ΡΡΠΉ ΡΠΎΠ΄ΠΎ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΡ ΠΊΠΎΠ½ΡΡΠ³ΡΡΠ°ΡΡΡ ΡΠ½ΡΡΡΡΠΌΠ΅Π½ΡΡ ΡΠ° Π±ΡΠ»ΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΠΌΡ Π²ΠΏΡΠΎΠ²Π°Π΄ΠΆΠ΅Π½Π½Ρ Π΄Π°Π½ΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠ² Π½Π° Π²ΠΈΡΠΎΠ±Π½ΠΈΡΡΠ²
Designing A Kinematic Module with Rounding to Model the Processes of Combined Radial-longitudinal Extrusion Involving A Tool Whose Configuration is Complex
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 processe