Process for producing a shaft clamping member
US5566449A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 18, 1994 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Aug 18, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2162
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A connecting rod as a shaft clamping member includes a rod member and cap, each of which has mating faces at circumferentially opposite ends of a semi-circular recess and which are fastened to each other by bolts by matching the opposed mating faces to each other to define a crank pin hole by the two semi-circular recesses. The rod member and the cap are forgings formed from an aluminum alloy and simultaneously produced by forging powder preforms of the rod member and cap in a cavity having the desired shape of the connecting rod. After forging, the opposed mating faces have an infinite number of recesses and projections which are formed from the flow of the material during the forging and which are in a matched and fitted relation to each other. Thus, any misalignment between and in a direction parallel to the mating faces can be prevented to avoid the generation of a situation that only the rod member receives a stress. This achieves a prolongation in the life of the connecting rod of the aluminum alloy. The composition of the most desirable aluminum alloy includes, by weight, 7% .ltoreq.Fe<15%, 1% <Si<4% and between 1% and 3% of a metal selected from Ti, Zr, Mn, Ni, Cr, V, Mg an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.