Transactions of Materials and Heat Treatment

Title：Optimization on process parameters in the incremental forming based on improved ant colony algorithm

Authors： Wang Yuhuai Wang Lidong Gou Zhijian Tong Xiaoping

Unit： Hangzhou Normal University

KeyWords： incremental forming ant colony algorithm thinning rate orthogonal experiment ANSYS/LS-DYNA

ClassificationCode：TG386.4

year,vol(issue):pagenumber：2018,43(10):57-62

Abstract：

For the problem of uneven thickness distribution easily leading to the local fracture of sheet in the incremental forming, taking the average thinning rate as the objective function, an improved ant colony algorithm used for the combination optimization of incremental forming process parameters was proposed. Then, taking the forming angle, tool head diameter, initial sheet thickness and axial increment as input parameters and the thinning rate as output parameter, the secondorder model was established by the regression analysis, and the minimum optimization problem model for thinning rate and its constraint conditions were given. Furthermore, based on the truncated conical parts with different forming angles, the optimal process parameters of tool head diameter Φ10 mm, initial sheet thickness 1.0 mm and axial increment 1.0 mm were obtained by the ant colony algorithm. For the truncated conical parts with forming angles of 30°, 37°, 45° and 60° respectively, the simulation based on ANSYS/LSDYNA and the experiment of Al1060 aluminum sheet were conducted by the optimized parameters. The results show that compared with the thinning rate for the Sine rule, the maximum deviations of the thinning rate for the improved ant colony algorithm, simulation and experiment are 0.823%, 1.16% and 3.4%, respectively.

Funds：

浙江省自然科学基金重点项目（LZ12E05003）

王玉槐（1981-），男，博士，讲师，E-mail：5472728@qq.com

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