Method of compacting the surface of a sintered part
US8474295B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2007 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Sep 29, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49474
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention describes a method of compacting the surface of a sintered part (2), whereby a sintered part (2) is moved in a die (1) along an axis (3) in a pressing direction (20) through several die portions (7, 8, 9) from a first die portion (7) at a first die orifice (6) into a last die portion (9), and a wall surface (16) of each die portion (7, 8, 9) forms at least one pressing surface (18) against which a contact surface (17) formed by an external surface (12) of the sintered part (2) is pressed, and an internal contour (25) defined by the pressing surface (18) lying in a cross-section by reference to the axis (3) at least approximately corresponds to an external contour (26) defined by the contact surface (17). As the sintered part (2) is moved, the surface is compacted from the first die orifice (6) to the last die portion (9) by die portions (7, 8, 9) continuously merging into one another and by monotonously decreasing internal diameters (19) of the die portions (7, 8, 9) as measured between co-operating pressing surfaces (18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.