Diametral control of rolled annular workpieces by weighing
US3992911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1975 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Jul 21, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21H1/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of roll forming an annular workpiece to a desired shape from a workpiece having dimensions within a tolerance range, in which the difference in weight between the workpiece and a nominally sized workpiece is determined and the workpiece is then roll formed to its desired shape by being squeezed between at least two rotating forming members which advance relatively towards one another to a fully advanced position to impress the desired shape into the workpiece followed by maintaining the forming members at their fully advanced position to complete the roll forming for a period of time known as the dwell time. The extent of advancement of the forming members or the dwell time is varied from the standard required for the nominally sized workpiece in dependence upon the difference in weight of the workpiece from the nominally sized workpiece so as to produce a final rolled workpiece whose diameter is substantially identical with that of a nominally sized workpiece subjected to the standard extent of advancement of the forming members or dwell time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.