Brazing powder deposition method

Abstract

Abstract Apparatus and method, in preferred form, particularly adapted for evenly depositing a brazing powder at the interface of a honeycomb sheet and a substrate. The apparatus is comprised of a head having a working face defined by a porous medium, the medium permitting suction therethrough but preventing powder from passing therethrough. The face of the head is provided with shims of a preselected thickness, that thickness being dependent on the weight of powder per unit area to be deposited. In use, a partial vacuum is established on one side of the head''s working face and the powder to be deposited is placed on the other side of the face, the powder thereby being held to the face. A definite and reproducible powder thickness is established by scraping excess powder off the face through use of a knife edge in cooperation with the shims. The honeycomb sheet is preliminarily fixed to the substrate such as, for example, by tack-welding. Thereafter, the powder-coated face of the head is positioned over the honeycomb sheet and the vacuum released. This allows the powder to drop from the head''s working face through the honeycomb cells onto the substrate surface. Such results in an even distribution of powder on the exposed area of the substrate, and is a practical method of achieving such distribution in that no skilled operator is required.

Inventors

• 👤 Orsdel J Van

Bibliographic Details