Reducing tubes over a stepped mandrel to manufacture tubular shafts having an undercut in one operation
US7644601B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2005 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Nov 15, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49391
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing hollow shafts having end portions of greater wall thickness and at least one intermediate portion of reduced wall thickness, from a tube having constant wall thickness. The method includes providing a mandrel having diameters stepped over its length, with a first longitudinal section having a smallest diameter and at least one further longitudinal section having a further larger diameter. Reducing the external diameter of a first portion of the tube over the first longitudinal section of the mandrel to produce the first end portion. Reducing the external diameter of a middle portion of the tube over the at least one further longitudinal section of the mandrel to produce the at least one intermediate portion. Reducing the external diameter of a further portion of the tube over the first longitudinal section of the mandrel to produce the second end portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.