Method for hardening a surface of a cam provided on a camshaft
US4658111A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Sep 30, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18312
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method and apparatus are provided for hardening a surface of a cam which forms a chill layer of equal depth on the surface of the cam. The method includes the steps of rotating a cylinder cam and thereby oscillating a holder, rotating a camshaft on which the cam whose surface is to be hardened is located and emitting the high energy toward the surface to be hardened. The cylinder cam which is rotated includes a guide groove which includes at least two straight grooves and at least two `V` shape connecting portions so that `V` shape connecting portions connect the straight grooves and form a continuous peripheral guide groove on a surface of the cylinder cam. The holder which holds the camshaft is oscillated at a constant speed in the axial direction of the camshaft by the rotation of the cylinder cam. The camshaft is rotated in the circumferential direction of the camshaft concurrently with the oscillation of the holder. A torch is provided to emit the high energy to the surface of the cam concurrently with the oscillation of the holder and the rotation of the camshaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.