Modular apparatus for compression forming or calibrating of powder metal workpieces
US5366363A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1992 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Aug 14, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
To form and compact a powdered metal workpiece (W) having an outer spiral circumference, for example a helical gear, the apparatus has a press mold (21) in a compaction press. This mold can be used for manufacture or for sizing or calibrating workpiece dimensions. A first rotatable and axially movable plunger, punch or ram (16) is movable towards the press mold, and a second rotatable or axially movable plunger or punch or ram (27) is movable through the press mold. To ensure and control rotation of the first (16) plunger, a helical cam system (13, 15) formed by a core element (15) having a spiral outer contour in engagement with a matrix or nut element (13) is provided, the system being coupled to the first plunger (16) by a gear transmission (11, 12) coupled to the matrix element and to the first plunger, punch or ram (16). An additional centering plunger, or core plunger, for example to make an axial bore (3) in the workpiece, or additional concentric portions on the workpiece, such as a smooth hub (4) and a geared hub (2) at the other side, are positioned concentrically to the first plunger and the press mold. The cam system is readily replaceable with spiral surfaces of differ…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.