TY - JOUR

T1 - Influence of the cross section area reduction in cross wedge rolling on the multi-directional forging of crankshafts

AU - Rasche, Neelam

AU - Stonis, Malte

AU - Behrens, Bernd Arno

N1 - Funding information: The authors thank the German Research Foundation (Deutsche Forschungsgemeinschaft – DFG) for the funding of the research project ‘ProKomb – Prozesskombination des Querkeilwalzens mit der mehrdirektionalen Umformung’ (DFG STO 1011/5-1). This work was supported by Deutsche Forschungsgemeinschaft [grant number DFG STO 1011/5-1].

PY - 2017/7/14

Y1 - 2017/7/14

N2 - Low energy demand and fast processing time are required in each industrial process for the production of crankshafts. A crankshaft is a part of combustion engines. It has a very complex geometry and is 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 of the influence of the cross section area reduction in cross wedge rolling on different parameters at multi-directional forging. First the state of research, the process development and tool design of cross wedge rolling and multi-directional forging will be described. Then the parameter field study will be presented and the influence of the cross section area reduction on flash, billet temperature, forming degree, forming forces and stress will be shown. Generally, flash develops because a rotation-symmetric billet is forced into an asymmetric movement. The least amount of flash develops at high cross section area reductions (>40%).

AB - Low energy demand and fast processing time are required in each industrial process for the production of crankshafts. A crankshaft is a part of combustion engines. It has a very complex geometry and is 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 of the influence of the cross section area reduction in cross wedge rolling on different parameters at multi-directional forging. First the state of research, the process development and tool design of cross wedge rolling and multi-directional forging will be described. Then the parameter field study will be presented and the influence of the cross section area reduction on flash, billet temperature, forming degree, forming forces and stress will be shown. Generally, flash develops because a rotation-symmetric billet is forced into an asymmetric movement. The least amount of flash develops at high cross section area reductions (>40%).

KW - crankshaft

KW - cross section area reduction

KW - cross wedge rolling

KW - Multi-directional forging

KW - parameter study

UR - http://www.scopus.com/inward/record.url?scp=85044398676&partnerID=8YFLogxK

U2 - 10.1080/2374068x.2017.1328151

DO - 10.1080/2374068x.2017.1328151

M3 - Article

AN - SCOPUS:85044398676

VL - 3

SP - 286

EP - 299

JO - Advances in Materials and Processing Technologies

JF - Advances in Materials and Processing Technologies

SN - 2374-068X

IS - 3

ER -