Method of manufacturing mechanical parts from metal scrap
US4272877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1978 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | May 31, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49753
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing mechanical parts from the raw material of metal scrap such as shavings and turnings of castings and steel and press chips of steel, includes the steps of: preparing the metal scrap including shavings and turnings; forming a billet by pressing metal scrap; heating the billet to the forging temperature, whereby a satisfactory plasticity is given to the billet for plastic deformation of metal scrap in the succeeding process; and forming the heated billet into a forged workpiece by use of a semi-closed forging die. The shape of the billet is determined such that, in this forging step, the respective portions of the billet are subjected to plastic deformation having a given plastic deformation rate, whereby material flow sufficient to generate metallic bond at the respective portions is caused, and burred portions are formed on portions of the forged workpiece mainly subjected to extrusion press during die-forging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.