Investigation of applying protective sheet metal die covers for hot forging dies on a cross-forging geometry
Investigation of applying protective sheet metal die covers for hot forging dies on a cross-forging geometry
复制标题
在交叉锻造几何形状上应用热锻模具保护性金属板模具盖的研究
DOI:
10.1007/s00170-018-03250-4
复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
G. Hirt
中科院分区:
文献类型:
--
作者:
J. Zottis;M. Wolfgarten;G. Hirt
Improving tool life is one of the main challenges and research objectives in closed-die forging. One approach, first proposed in (Rosenstock et al. 2015) uses an inexpensive and easy-to-exchange sheet metal die cover, which is placed on the die surface during forging. By using this cover, die wear can be reduced since mechanical and thermal loads mostly affect the die cover instead of the die itself. Numerical and experimental investigations (Wolfgarten et al. 2015; Yu et al. 2016) have proven the general key features of the concept and the positive impact on the lifetime of the forging die. However, these studies have shown that the applicability of the concept and the corresponding lifetime of the die cover are strongly dependent on the investigated die and die cover geometries. For simple 2D die cover geometries, where the die cover can be produced by a simple bending operation, the maximum die cover lifetime of seven forging cycles was achieved. Since these geometries offer low structural stability, the die covers are prone to deformation or folding during forging. Hence, this work investigates the application of die covers in complex geometries. For this purpose, a 3D die cover geometry was proposed that offers higher structural stability and less challenging contact conditions regarding the material flow during forging. The die cover successfully experienced 40 forging cycles without visible distortions or folds. Regarding the thermal loads, the maximum temperature and the temperature amplitude measured in the forging die were reduced by 40 °C. Based on the experimental results, a numerical simulation model was built and validated regarding the temperature evolution and forging forces. The numerical model indicates a significant reduction in the mechanical loads on the dies through the application of the die cover.
登录
查看更多内容
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
T. Arai
通讯作者:
T. Arai
影响因子:
4.4
作者:
Paschke, H.;Weber, M.;Brand, H.
通讯作者:
Brand, H.
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
M. Spittel;T. Spittel
通讯作者:
T. Spittel
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
H. Kwon;Alan N. Bramely
通讯作者:
Alan N. Bramely
影响因子:
5
作者:
Kazuya Horie;M. Nanko;Yoshihiro Kuwabara;Satoru Nishiwaki
通讯作者:
Satoru Nishiwaki