| 摘要 |
FIELD: plastic working of metals, possibly manufacture of forged pieces with central opening. ^ SUBSTANCE: method comprises steps of upsetting heated initial blank; forming semi-finished product having bridge in zone of one end of its inner portion in die set without forming burr; remaining part of end surface having no contact with tool; then performing final forming, mainly in one half of open die set at displacing outer burr and with possibility of displacing inner burr; removing bridge and trimming burrs. ^ EFFECT: lowered metal and energy consumption at process. ^ 20 cl, 6 dwg, 1 ex |
