Transactions of Materials and Heat Treatment

Title：Polygon operation and filling method of path planning for wire arc additive manufacturing

Authors： Zhang Jiansheng1 2 Wang Qiuyun1 Xiao Guiqian2 Zhou Jie1

Unit： 1.Chongqing Key Laboratory of Advanced Mold Intelligent Manufacturing College of Materials Science and Engineering Chongqing University v

KeyWords： wire arc additive remanufacturing complex section contour path planning polygon operation composite filling

ClassificationCode：TG315.2

year,vol(issue):pagenumber：2021,46(12):128-132

Abstract：

When the existing wire arc additive manufacturing (WAAM) path planning method is applied to hot forging molds with complex cross-sectional contours, such as the target model to be repaired with a cavity or thin-walled structure inside, there are problems of a step effect at the edge, a degraded edge in the offset contour and programming complexity, etc. Therefore, based on the above problems, a composite filling method that used a linear scanning filling algorithm for the inside of section and a contour offset filling algorithm for the outside of section was proposed to make uniform internal filling and smooth external transition, and according to the intersection of inner and outer contours that often occurred in the process of contour offset, a solution was proposed and the geometric relationship operation when polygons intersected was emphatically discussed. Finally, for a failed crankshaft forging mold, the wire arc additive manufacturing repair experiment was conducted the composite filling method was used to fill path during the repair process, and the feasibility of the new method was verified by experiments. The repair results of the crankshaft mold show that the mold without gap, slag inclusion, crack and other defects after machining is obtained by the composite filling method.

Funds：

国家重点研发计划项目(2018YFB1106504）；重庆市自然科学基金博士后科学基金(cstc2020jcyjbshX0006)

张建生(1990-),男,博士,高级工程师 E-mail：zhangjiansheng@cqu.edu.cn

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