Machining head and process for the surface machining of workpieces by means of a laser beam
US6316744A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2000 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Mar 3, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/52
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention relates to a machining head and to a process for the surface machining of workpieces by means of a laser beam, in which coating, alloying in the area close to the surface or dispersion of a peripheral zone of the base material with powder particles can be carried out using a pulverulent filler supplied. The invention is intended to make it possible to maintain, independently of direction, a virtually constant mass flow rate of the powder supplied, the intention being to form a uniform hollow powder jet. According to the invention, this object is achieved by the fact that in a housing of the machining head a turbulence chamber is formed, into which a powder-gas flow is introduced at least via one entry opening and the powder-gas flow is directed through a conical annular gap, as a hollow coaxial jet, as is the laser beam guided through the housing, onto a workpiece surface, and stabilizing passages, which are aligned parallel to the longitudinal axis of the laser beam, are present in a radially symmetrical arrangement between the turbulence chamber and the annular gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.