TY - CHAP

T1 - Control of geometry deviation by stiffness variation in polymer deep drawing tools

AU - Mennecart, Thomas

AU - Güner, Alper

AU - Ben Khalifa, Noomane

AU - Tekkaya, A. Erman

PY - 2014

Y1 - 2014

N2 - Due to the fact that the automotive industry is increasing the amount of vaiants of cars, the produced parts become more and more less. As a result, the same types of produced parts decrease and therefore the use of tools with a lifetime of nearly 10,000 parts gets a higher attractiveness. For forming operations with a low production volume or even for the design or try out process, deep drawing tools made out of polymers can be used. To enhance the wear behaviour of the tools, it is possible to protect the polymer by a hard metal coating. One of the main advantages of the polymer material in such a tool is the possibility to change or influence the stiffness. By varying the stiffness, the material flow can be controlled. This is useful to influence the geometry deviation and the springback behaviour of deep drawn parts. The use of an elastic tool leads to a broad process wmdow for the forming operation. In the presented research results the possibility of the influence of stuffiness variation in polymer tool is investigated for two forming processes of DP 600 high strength steel. A comparison of the forming behaviour with polymer die and steel die is operated in these investigations. In the polymer die, the stiflhess could be varied by the use of metallic springs and electrical linear actuators. Thereby the stiffness was controlled temporally and locally. The observed results show, that with the use of such functional elements the springback and the geometry deviation could be reduced successfully.

AB - Due to the fact that the automotive industry is increasing the amount of vaiants of cars, the produced parts become more and more less. As a result, the same types of produced parts decrease and therefore the use of tools with a lifetime of nearly 10,000 parts gets a higher attractiveness. For forming operations with a low production volume or even for the design or try out process, deep drawing tools made out of polymers can be used. To enhance the wear behaviour of the tools, it is possible to protect the polymer by a hard metal coating. One of the main advantages of the polymer material in such a tool is the possibility to change or influence the stiffness. By varying the stiffness, the material flow can be controlled. This is useful to influence the geometry deviation and the springback behaviour of deep drawn parts. The use of an elastic tool leads to a broad process wmdow for the forming operation. In the presented research results the possibility of the influence of stuffiness variation in polymer tool is investigated for two forming processes of DP 600 high strength steel. A comparison of the forming behaviour with polymer die and steel die is operated in these investigations. In the polymer die, the stiflhess could be varied by the use of metallic springs and electrical linear actuators. Thereby the stiffness was controlled temporally and locally. The observed results show, that with the use of such functional elements the springback and the geometry deviation could be reduced successfully.

KW - Engineering

KW - Kunstoff

KW - Werkzeugwerkstoff

KW - Polymer

KW - Rückfederung

KW - Hartmetall

KW - Werkzeugstahl

KW - hochfester Stahl

KW - Prototypentwicklung

KW - Steifigkeit

KW - Umformen

KW - Lebensdauer

KW - Automobilindustrie

KW - Verschleißschutzschicht

KW - Linearaktuator

KW - Ziehteil

KW - Funktionsglied

KW - Matrizenwerkstoff

KW - Umformverhalten

KW - Steifigkeitsanpassung

KW - Tiefziehwerkzeug

KW - Funktionselement

KW - stiffness variation

KW - steel die

UR - http://d-nb.info/1072654962/04

M3 - Article in conference proceedings

SN - 978-3-88355-400-6

SP - 291

EP - 298

BT - New Developments in Sheet Metal Forming Technology

A2 - Liewald, Mathias

PB - MAT-INFO Werkstoff-Informationsgesellschaft mbH

T2 - International Conference on "New Developments in Sheet Metal Forming"

Y2 - 13 May 2014 through 14 May 2014

ER -