New type of groove used to improve friction in roll forging
来源期刊：中南大学学报(英文版)2014年第2期
论文作者：JIA Zhi(贾智) 周杰 JI Jin-jin(姬金金)
文章页码：493 - 499
Key words：roll forging; spring board; oval-diamond groove; rectangular groove; automobile front axles
Abstract: A FEM model for a failed industrial example of roll forging was established to analyze the generation mechanisms of the mismatch of size and shape of two spring board. To demonstrate the formulation of these defects, the bites condition and contact status between rectangular groove and workpiece during rolling the first and second spring boards were analyzed. Then, a new oval-diamond groove combining oval groove and diamond groove was presented to eliminate these defects. By analyzing field variables under the same deformation degree, the larger friction can be obtained on the contact surface of workpiece and the oval-diamond groove. The physical experiment validates that the oval-diamond groove can eliminate these defects effectively, and the size of part is in good agreement with design requirement.
JIA Zhi(贾智) , ZHOU Jie(周杰), JI Jin-jin(姬金金)
(School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China)
Abstract:A FEM model for a failed industrial example of roll forging was established to analyze the generation mechanisms of the mismatch of size and shape of two spring board. To demonstrate the formulation of these defects, the bites condition and contact status between rectangular groove and workpiece during rolling the first and second spring boards were analyzed. Then, a new oval-diamond groove combining oval groove and diamond groove was presented to eliminate these defects. By analyzing field variables under the same deformation degree, the larger friction can be obtained on the contact surface of workpiece and the oval-diamond groove. The physical experiment validates that the oval-diamond groove can eliminate these defects effectively, and the size of part is in good agreement with design requirement.
Key words:roll forging; spring board; oval-diamond groove; rectangular groove; automobile front axles
