FIELD: plastic metal working, possibly manufacture of sharply bent branch pipes of tube blanks. SUBSTANCE: die set unit with parting die and shaping hydraulic cylinders are mounted in frame of press. One hydraulic cylinder is provided with punch for pulling through tube blank; outer hydraulic cylinder has ball type end pushing punch. One hydraulic cylinder is mounted on bracket jointly connected with frame with possibility of rotation relative to frame and bracket in horisontal plane. Elastic filler is placed in cavity of tube blank. Shaping hydraulic cylinders are provided with additional hydraulic cylinders mounted in shaping ones coaxially to them and telescopically joined with them. It provides possibility for making thin-wall pipeline members with bent axis. EFFECT: improved quality of branch pipes due to elimination of their corrugation and material rupture. 3 dwg, 1 ex
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Authors
Dates
2001-08-20—Published
1998-10-06—Filed