Production process of a piston
US5653021A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1996 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Mar 8, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49265
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
To improve the abrasion resistance by increasing the ratio of copper content in the copper-type alloy layer on the periphery of the ring groove of a piston. A peripheral groove having a section of a roughly large trapezoidal shape larger than that of the ring groove is formed preliminarily on the outer peripheral face of the piston. While the powder of a copper-type alloy material is supplied to this peripheral groove, the laser beam is irradiated to melt the powder, and a thickening layers is thus formed. The thickening layer of a copper-type alloy is subjected to the machining process to form a ring groove for attaching the top ring,
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.