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论文类型：期刊论文

发表时间：2011-12-01

发表刊物：Guangxue Jingmi Gongcheng/Optics and Precision Engineering

收录刊物：EI、PKU、ISTIC、Scopus

卷号：19

期号：SUPPL.2

页面范围：29-34

ISSN号：1004924X

摘要：The effects of single-layer offsets on the cladding heights of inclined thin-walled parts were investigated to improve the formed quality of the parts by laser cladding forming. Under the conditions of three-axis, open-loop control and quarter circle scanning path, the experiments were performed for inward and outward inclined thin-walled parts by laser cladding forming, respectively. To guarantee that total Z-increment could be close to the cladding height, different Z-increments of single-layer were used for corresponding level offsets of thin-walled parts. The experimental results show that the cladding height of inclined thin-walled parts decreases with the increasing offset. Moreover, the rate of reduction firstly increases, and then decreases. The thin-walled parts start to collapse when the rate increases again. The cladding heights of outward inclined thin-walled parts are higher than those of the inward ones, and the additional heights of cladding layer increases with the increasing offset up to a stable range from 0.15 mm to 0.2 mm. The utmost offset values of single-layer for inward and outward inclined thin-walled parts are 0.09~0.1 mm and 0.1 ~0.11 mm, respectively, and both the inclination angles are close to the limit of 40  . When the cladding parts reach the inclination limit, continuing increment of the offset or reduction of the Z-increment would lead to the collapse of the cladding parts seriously and the reduction of cladding height sharply. It concludes that reasonable controls of single-layer offset and Z-increment could form higher quality thin-walled parts with larger inclination angles.