Patent · US Active

Method of joining by electron beam or laser welding a turbocharger turbine wheel to a shaft; corresponding turbocharger turbine wheel

US10603740B2 · kind B2 · utility

0Cited by

1References

10Claims

0Family size

Assignee

BorgWarner Inc. · US

Inventors

Silvio Koch · Kirchheimbolanden, DE
Stefan Eisinger · Bornheim, DE

Key dates

Filing date	Jan 22, 2016
Grant date	Mar 31, 2020
Priority date	—
Expiry date	Jun 8, 2036

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05D2230/234
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A turbocharger wheel (4) and shaft (1) assembly exhibits a frustoconical geometry of welding zone contact surfaces extending to the outer circumference of the shaft (1). This frustoconical geometry not only allows continuous centering of the parts (1, 4) during joining, it also eliminates the problem of stress propagation along a plane. The location of the electron beam is shifted so that only the radially outer segment of the frustoconical contact surface is joined by welding, leaving a radially inner unmelted and unfused zone for maintaining firm contact of the oblique surfaces.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.