Effects of Punch Shapes and Cutting Configurations on the Dimensional Accuracy of Punched Holes on an AHSS Sheet AK Steel Corporation

Format:

Conference/Event

Author/Creator:

Pu, Pu, author.

Contributor:

Du, Changqing

Jia, Yueqian

Makrygiannis, Panagiotis (John)

Wang, Youwei

Wu, Wei

Zhou, Dajun

Zhu, Feng

Conference Name:

WCX World Congress Experience (2018-04-10 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2018

Summary:

AbstractDimensional accuracy of punched hole is an essential consideration for high-quality sheet metal forming. An out-of-shape hole can give rise to manufacturing issues in the subsequent production processes thus inducing quality defects on a vehicle body. To understand the effects of punch shapes and cutting configurations on punched hole diameter deviations, a systematical experimental study was conducted for multiple types of AHSS (DP1180, DP980, DP590) and one mild steel. Flat, conical and rooftop punches were tested respectively with three cutting clearances on each material. The measurement results indicated different diameter enlargement modes based on the punch profiles, and dimensional discrepancies were found to be more significant with the stronger materials and higher cutting clearance. To uncover the mechanism of punched hole enlargement, a series of finite element simulations were established for numerical investigation. The diameter change is mainly owing to the spring-back for the additional material deformation induced by punch tip. Its consequent benefits for tool protection from punching induced enlargement will be also discussed

Notes:

Vendor supplied data

Publisher Number:

2018-01-0800

Access Restriction:

Restricted for use by site license