FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and may be used for making rod elements with lengthwise ribs by forging. Upsetting is used to shape workpiece with flange at first pass cylindrical workpiece, inner groove in flange zone and ledge on flange end surface. Groove depth makes 1.5 of flange height. Ledge thickness corresponds to that of side wall of workpiece cylindrical part with flange. Ledge height makes 0.4-0.6 of its thickness. At second pass, lengthwise ribs are formed in flange zone by extrusion in female die. Upsetting and extrusion are carried out at heated flange temperature of 450-470°C. Aforesaid female die is heated to 250-300°C. After extrusion, finished product is withdrawn from female die by liquid phase medium.
EFFECT: long-length rod-type parts with thin-wall lengthwise ribs.
6 dwg, 1 tbl
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