Method and apparatus for the manufacture of a thin sheet orifice plate
US3978705A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1975 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Mar 14, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9314
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A thin sheet metal orifice plate is disclosed having at least one orifice therethrough with a rounded inlet to improve flow and an outlet defined by an encircling projection whose axis accurately conforms to a predetermined direction. Apparatus for the production of such an orifice plate is disclosed and includes a forming tool operable to form a spherical boss in a flat intermittently advanced thin metal sheet of orifice blank material. The apparatus includes an orifice plate blank trimming tool having a punch and die assembly for accurately trimming the spherical boss from a continuous strip such that an annular flange is provided therearound. An orifice punching apparatus is provided having a chuck for holding an orifice plate blank adjacent to a resilient backing material. The chuck is supported by an angular adjustment apparatus which, in turn, is rotatably supported on a base and provided with a pair of detent mechanisms. The detent mechanisms secure the angular position of the adjustment apparatus. A horizontally reciprocable punch is aligned with its longitudinal axis passing through a locus of curvature of an orifice blank when carried by the chuck. The punch is provided w…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.