Method for pressing a workpiece with a predetermined pressing force
US11161316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2017 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Jul 9, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB30B15/26
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for pressing a workpiece with a predetermined pressing force uses a forming tool coupled with an electric motor via a spindle drive that converts the rotational movement of the electric motor drive shaft to a translational movement of the forming tool. The method includes: accelerating the electric motor in a first rotational direction to a predetermined maximal speed of rotation; operating the electric motor at the maximal speed until the drive shaft has completed a predetermined number of revolutions; reducing the speed of rotation of the electric motor to a predetermined reduced speed of rotation; operating the electric motor at the reduced speed until a pressing force increase exceeding a predetermined threshold value is detected by a measuring unit that follows the electric motor; forming the workpiece with constant detection of the pressing force by the measuring unit until the predetermined pressing force has been reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.