Transactions of Materials and Heat Treatment

Title：Influence of pre-coated oil for sheet metal on forming performance of stamping parts

Authors： ang Xiuchen1 Zhen Huaxiang1 Wu He1 Zhang Qinmei1 He Jing1 Wang Qi2

Unit： 1. Production Readiness FAWVOLKSWAGEN Automotive Co. Ltd. 2. Press Center FAWVOLKSWAGEN Automotive Co. Ltd.

KeyWords： formability interfacial friction sheet metal lubrication machine for cleaning and oil coating squeezing roller pressure

ClassificationCode：TG386.1；TG305

year,vol(issue):pagenumber：2021,46(12):112-116

Abstract：

In order to explore the friction condition between die and sheet metal during the stamping production process, determine the oil-coated squeezing roller pressure required by sheet metal lubrication and solve the problem of sheet metal lubrication that was difficult to control in the production process of body exterior parts, for the fender of a vehicle with material designation of HC180B+ZE75BPO and the thickness of 0.7 mm, using cleaning oil type of NR-320 with the kinematic viscosity of 7.5-9.5 mm2·s-1 at 40 ℃, the fender forming experiments were carried out by controlling different squeezing roller pressures, and the area obtained with the largest deformation for the fender was analyzed by grid experiment. Then, the corresponding relationships between the squeezing roller pressure of different cleaning and oiling machines and the oil film thickness on the sheet metal surface were studied so as to analyze the influence on the thinning rate of sheet metal. With the increasing of the pressure for squeezing roller, the coating amount of oil film on the sheet metal decreased, which was easy to cause necking or cracking defects. Considering that more pro-coated oil can cause local wrinkle defect, the suitable pressure range of oil-coated squeezing roller was 9.0-9.5 MPa.

Funds：

杨秀臣（1990-），男，硕士，外协件管理工程师 E-mail：yangxiuchen2008@126.com

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