尖顶封闭结构件激光熔覆成形工艺研究

采用中空激光光内送粉技术,成形尖顶封闭结构件。采用法向分层方法和顶端封口技术,熔覆成形尖点封闭结构件的圆台、圆筒以及圆锥连接结构。法向分层方法能够消除圆台和圆锥成形过程中的台阶效应,采用间歇熔覆和分段扫描相结合的方法,解决圆锥封口处在堆积时熔覆层产生热集聚效应而导致封口处塌陷的问题。检测结果表明,成形件形貌和质量较好,尺寸误差在8%以内。

Study of Laser Cladding Forming Technology of Spindle Closed Structure

The hollow laser light internal powder feeding technology is used to form the closed structure of spire.The normal stratification method is used with the top sealing technique to form a round table,a cylinder and a conical connecting structure for forming a cusp closed structure member.The normal stratification method can be used to eliminate the step effect in the forming process of the circular table and the cone.The combination of intermittent cladding and segment scanning is used to solve the collapse caused by the heat accumulation effect of the cladding layer when the cone is stacked at the sealing.The test results show that the shape and quality of the formed part is good,the size error is within 8%.