Process and apparatus for preparation of thin walled cylindrical vessels
US3945231A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1974 |
| Grant date | Mar 23, 1976 |
| Priority date | — |
| Expiry date | Oct 29, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D37/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In preparing thin walled cylindrical containers, e.g., can bodies, by the drawing and ironing processing, the lubricating effect between the metal material and tool metal can be highly improved by irradiating ultrasonic waves at least to the part to be ironed of the side wall portion of a cup-like formed article simultaneously with application of a lubricant. With the improvement of the lubricating effect thus attained, the manufacturing rate of can bodies can be greatly increased without such troubles as breakages of the head portion, the ear edge portion and the bottom wall portion of the can body. This improvement of the lubricating effect can be further enhanced when ultrasonic waves are irradiated in the direction perpendicular to the tapered face of a tapered inlet portion of an ironing die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.