2011 年 37 巻 6 号 p. 316-320
Blast processing is a substrate processing technique during which spherical or granular materials are jetted against the substrate surface using compressed air. Blasting techniques is widely used for various mechanical parts as a surface reforming technique. When performing blast processing to a complicated-shaped substrate for the purpose of thermal spraying method, it is difficult to set blasting angle to a constant value and it is necessary to clarify the effect of state of substrate on blast processing. In present paper, the effect of blasting angle to removal processing effect and the modification state of substrate is investigated. Results from this investigation are summarized as follows: When blasting angle θ was 30º, the removal quantity ● showed the maximum. The removal quantity became large as cylindrical diameter D was larger. Removal quantity of particle diameter a =100 μm is bigger than that of a =700 μm. As a nozzle movement rate v increased, removal quantity ● became small. As blasting angle θ became small, removal quantity ● became large even though nozzle movement rate v was changed. As blasting pressure P increases, removal quantity ● became big.