Transactions of Materials and Heat Treatment

Title：Optimization on simulation parameters for TBM disc cutter ring in die forging

Authors： Ma Chengbiao

Unit： China Railway Construction Heavy Industry Group Co. Ltd.

KeyWords： disc cutter ring die forging Taguchi method multi-objective optimization orthogonal experiment

ClassificationCode：TG316

year,vol(issue):pagenumber：2019,44(7):7-14

Abstract：

In order to study the die forging characteristics and improve the forming quality of disc cutter ring, a finite element analysis model for the die forging process of disc cutter ring was established based on Deform by numerical simulation, and the influences of initial forging temperature, forging speed and friction factor on the forming quality of cutter ring were studied. Then, the multi-objective optimization of the above forming parameters was carried out based on Taguchi method, and the experimental verification was conducted. The results show that the initial forging temperature has the greatest influence on the forming performance, and there is an interaction between the initial forging temperature and the forging speed. Thus the optimum combination of die forging parameters is the initial forging temperature of 1150 ℃, the forging speed of 25 mm·s-1 and the friction factor of 0.15. The detection results of die forging forming quality for cutter ring in the optimized process conditions show that the forming dimensions of cutter ring is consistent with the simulation results, the hardness distribution of cross section is uniform, and its values are 54-56 HRC. Furthermore, the average values of impact toughness in edge and core are 3.58 and 15.75 J·cm-2, respectively, which meet the requirements of cutter ring.

Funds：

湖南省战略性新兴产业科技攻关项目(2015GK1029)

麻成标（1969-），男，学士，高级工程师，E-mail：395056341@qq.com

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