电子束选区熔化技术, 储供粉系统, 铺粉系统, 粉末层厚

This paper analyzed the merits and faults of the existing powder supply and spread system. A new controllable vibrating powder spread system was proposed, considering the experimental conditions of EBSM: difficult to interfere in the vacuum chamber, high temperature in the melting zone, large stiffness of manufacturing parts, together with contacting powder spread system bringing down the whole process upon meeting bump unable to overcome. A new designation, non-contacting overhead sieve with feedback weighting sensor, capable of powder arching and arch vibrating elimination, realized powder spreading function by varying its speed and acceleration. The experimental results have verified the steadiness of the system, uniformly spreading can be achieved with certain amount of powder in the sieve, and the depth can be decided by moving speed and acceleration of the sieve, with 0.1mm the minimum. 

 electron beam selective melting(EBSM);  , supplying system;  , coating system;  , powder bed thickness