DEVICE FOR MANUFACTURE OF HOLLOW WORKPIECES BY UPSETTING Russian patent published in 1994 - IPC

FIELD: metal plastic working. SUBSTANCE: device for upsetting hollow workpieces has top and bottom plates, female die, male die, mandrel and pusher. Pusher lift crosspiece is connected by tie-rods to top plate for vertical movement inside mandrel. Pusher and crosspiece are fixedly attached to each other and are spring-loaded relative to female die located on slide blocks mounted on bottom plate. Mandrel has smooth lower working section and shaped top working section. On top section there is catcher of workpiece whose shaping corresponds to that of mandrel. Bottom plate has cross-shaped slot on its top surface for receiving crosspiece. Depth of slot corresponds to thickness of crosspiece. EFFECT: enhanced operating capability. 4 dwg