Method for forging rotationally symmetrical forging object e.g. gear wheel, involves inserting mandrel into blank by cupping top side towards bottom side of blank so that cavity is formed in blank

摘要

#CMT# #/CMT# The method involves providing a metal blank (10) having a top side (12), bottom side (14) and a central portion (11) between the top and bottom sides. The outwardly projecting contour is set by placing the top side of blank over center portion. A mandrel is inserted into the blank by cupping the top side towards the bottom side of blank so that a cavity (16) is formed in the blank. The outwardly projecting contour is set by placing the blank on its bottom side over the center portion. #CMT# : #/CMT# An independent claim is included for a forging tool. #CMT#USE : #/CMT# Method for forging rotationally symmetrical forging object e.g. gear wheel (all claimed). #CMT#ADVANTAGE : #/CMT# The forging object e.g. gear wheel is manufactured efficiently and stably at low cost. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows the sectional views explaining the process of forging rotationally symmetrical forging object. 10 : Metal blank 11 : Central portion 12 : Top side 14 : Bottom side 16 : Cavity.