Influence of the forming angle in cross wedge rolling on the multi-directional forging of crankshafts

authored by: Bernd Arno Behrens, Malte Stonis, Neelam Rasche
Abstract: In each industrial process for the production of crankshafts a low energy demand and a fast processing time are required. Crankshafts have a very complex geometry and are forged with a high percentage of flash compared to other forging parts. Recent research showed the feasibility of a flashless forging of crankshafts. One way to forge a flashless crankshaft within three steps is to use cross wedge rolling, multi-directional forging and final forging. This paper presents the investigation results regarding the influence of the forming angle α in cross wedge rolling on different parameters at multi-directional forging. First, the state of the art is presented. As a basis for the investigations the process development and tool design of cross wedge rolling and multi-directional forging are described. Afterwards the paper’s results regarding the influence of the forming angle α on flash generation, billet temperatures, forming degree, forming forces and effective strain will be presented as a parameter study. Generally, flash is generated because a rotation-symmetric billet is forced into an asymmetric movement. The influence of an increasing forming angle leads to a higher amount of flash at the bottom of the crankwebs.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
External Organisation(s): Institut für integrierte Produktion Hannover (IPH)
Type: Article
Journal: International Journal of Material Forming
Volume: 11
Pages: 31-41
No. of pages: 11
ISSN: 1960-6206
Publication date: 01.2018
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Materials Science
Electronic version(s): https://doi.org/10.1007/s12289-016-1326-3 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{1b4bd7131bb94245ac78aeb0b325d17a,
title = "Influence of the forming angle in cross wedge rolling on the multi-directional forging of crankshafts",
abstract = "In each industrial process for the production of crankshafts a low energy demand and a fast processing time are required. Crankshafts have a very complex geometry and are forged with a high percentage of flash compared to other forging parts. Recent research showed the feasibility of a flashless forging of crankshafts. One way to forge a flashless crankshaft within three steps is to use cross wedge rolling, multi-directional forging and final forging. This paper presents the investigation results regarding the influence of the forming angle α in cross wedge rolling on different parameters at multi-directional forging. First, the state of the art is presented. As a basis for the investigations the process development and tool design of cross wedge rolling and multi-directional forging are described. Afterwards the paper{\textquoteright}s results regarding the influence of the forming angle α on flash generation, billet temperatures, forming degree, forming forces and effective strain will be presented as a parameter study. Generally, flash is generated because a rotation-symmetric billet is forced into an asymmetric movement. The influence of an increasing forming angle leads to a higher amount of flash at the bottom of the crankwebs.",
keywords = "Crankshaft, Cross wedge rolling, Forming angle, Multi-directional forging, Parameter study",
author = "Behrens, {Bernd Arno} and Malte Stonis and Neelam Rasche",
note = "Publisher Copyright: {\textcopyright} Springer-Verlag France 2016. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",
year = "2018",
month = jan,
doi = "10.1007/s12289-016-1326-3",
language = "English",
volume = "11",
pages = "31--41",
journal = "International Journal of Material Forming",
issn = "1960-6206",
publisher = "Springer Paris",
number = "1",
}