Patent ID: 9409226
Filing Date: 2016-08-09
CPC Classification: B21J

Claim Text:
1. An apparatus for forging a first hollow body having a first hollow space with a first diameter and a second hollow body having a second hollow space with a second diameter different from the first diameter, said apparatus comprising forging tools which are arranged in a centrically symmetrical way about a forging axis, and a forging mandrel, wherein the forging mandrel comprises a mandrel core and first mandrel segments which are distributed over and supported on the circumference of the mandrel core, are exchangeably held on the mandrel core, and form first molding surfaces for the first hollow space of the first hollow body, wherein the first mandrel segments are held on the mandrel core so that the first mandrel segments are replaceable with second mandrel segments forming second molding surfaces for the second hollow space of the second hollow body, and wherein the circumference of the mandrel core is split into circumferential sections.